/* ============================================
   数学社 - 主样式表
   西交利物浦大学官方风格 · 深蓝主导 + 洋红紫点缀
   深蓝 #010544 主色 | 洋红紫 #CE57C1 强调色
   ============================================ */

/* ---------- 变量与重置 ---------- */
:root {
    /* 主色 - 深蓝（占比最高） */
    --primary: #010544;
    --primary-light: #2a2f6e;
    --primary-dark: #00031f;
    /* 强调色 - 洋红紫（仅作点缀） */
    --accent: #CE57C1;
    --accent-light: #e07ad7;
    --accent-dark: #a83e9b;
    /* 官方扩展色(20周年互补色板)- 深蓝主导下的多色点缀 */
    --navy: #1e3374;
    --blue: #0071b8;
    --cyan: #009fc5;
    --purple: #783891;
    --gold: #edb647;
    --lilac: #cfadcc;

    /* 阅读型详情页（module 专题详情）正文列宽：hero / 信息条 / 正文共用 */
    --reading-width: 860px;

    /* 淡色调（用于背景、徽章等） */
    --primary-50: rgba(1, 5, 68, 0.05);
    --primary-100: rgba(1, 5, 68, 0.09);
    --primary-200: rgba(1, 5, 68, 0.14);
    --accent-50: rgba(206, 87, 193, 0.08);
    --accent-100: rgba(206, 87, 193, 0.13);

    /* 中性色 */
    --bg: #FFFFFF;
    --bg-alt: #F5F6FA;
    --surface: #FFFFFF;
    --border: #E8ECF6;
    --border-strong: #d4dbeb;
    --text: #333333;
    --text-secondary: #555b6e;
    --text-muted: #8b91a6;
    --text-on-dark: #ffffff;
    --text-on-dark-muted: rgba(255, 255, 255, 0.72);

    /* 效果 */
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
    --shadow-sm: 0 1px 2px rgba(1, 5, 68, 0.04), 0 1px 3px rgba(1, 5, 68, 0.06);
    --shadow: 0 4px 6px -1px rgba(1, 5, 68, 0.07), 0 2px 4px -2px rgba(1, 5, 68, 0.05);
    --shadow-md: 0 10px 25px -5px rgba(1, 5, 68, 0.1), 0 8px 10px -6px rgba(1, 5, 68, 0.05);
    --shadow-lg: 0 25px 50px -12px rgba(1, 5, 68, 0.2);
    --shadow-primary: 0 10px 30px -8px rgba(1, 5, 68, 0.35);
    --shadow-accent: 0 10px 28px -8px rgba(206, 87, 193, 0.5);

    /* 渐变（大面积用深蓝渐变，小面积点缀用洋红紫渐变） */
    --gradient-primary: linear-gradient(135deg, #010544 0%, #1a1f63 100%);
    --gradient-accent: linear-gradient(135deg, #CE57C1 0%, #a83e9b 100%);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 90px;
}

body {
    font-family: var(--font-ui);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: color 0.2s; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; }

/* ---------- Scroll Reveal Animation ---------- */
[data-reveal] {
    opacity: 0;
    transform: translate3d(0, 22px, 0);
    filter: blur(8px);
    transition:
        opacity 0.72s cubic-bezier(.2, .8, .2, 1),
        transform 0.72s cubic-bezier(.2, .8, .2, 1),
        filter 0.72s cubic-bezier(.2, .8, .2, 1);
    transition-delay: var(--reveal-delay, 0ms);
    will-change: opacity, transform, filter;
}
[data-reveal="fade"] { transform: none; }
[data-reveal="left"] { transform: translate3d(-24px, 0, 0); }
[data-reveal="right"] { transform: translate3d(24px, 0, 0); }
[data-reveal].is-visible {
    opacity: 1;
    transform: translate3d(0, 0, 0);
    filter: blur(0);
}
@media (prefers-reduced-motion: reduce) {
    [data-reveal] {
        opacity: 1 !important;
        transform: none !important;
        filter: none !important;
        transition: none !important;
    }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
    cursor: pointer;
}
/* 主行动按钮 = 深蓝实心(去洋红紫渐变/发光) */
.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 6px 16px -10px rgba(1, 5, 68, 0.55);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 12px 26px -10px rgba(1, 5, 68, 0.5); }
/* 次级按钮(浅色背景上)= 白底 + 发丝描边 + 深蓝文字(去玻璃) */
.btn-ghost {
    background: #fff;
    border: 1px solid var(--border-strong);
    color: var(--primary);
    box-shadow: none;
}
.btn-ghost:hover { background: var(--bg-alt); border-color: var(--primary); }
.btn-lg { padding: 14px 28px; font-size: 15px; }
.btn-block { width: 100%; padding: 13px; }

/* ---------- 导航栏（深蓝主色） ---------- */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: rgba(1, 5, 68, 0.88);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: all 0.3s ease;
}
.navbar.scrolled {
    background: rgba(1, 5, 68, 0.92);
    backdrop-filter: blur(24px) saturate(1.4);
    -webkit-backdrop-filter: blur(24px) saturate(1.4);
    box-shadow: 0 6px 24px -8px rgba(1, 5, 68, 0.4);
}
.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 14px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}
.logo { display: flex; align-items: center; gap: 10px; }
/* 品牌图标 = 洋红紫点缀（品牌点） */
.logo-symbol {
    width: 42px; height: 42px;
    display: grid; place-items: center;
    background: var(--gradient-accent);
    color: #fff;
    font-size: 24px;
    font-weight: 700;
    border-radius: 12px;
    box-shadow: var(--shadow-accent);
}
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-title { font-family: var(--font-heading); font-weight: 600; font-size: 18px; color: #fff; letter-spacing: 0.01em; }
.logo-subtitle { font-size: 11px; color: var(--text-on-dark-muted); letter-spacing: 0.5px; }

.nav-menu { display: flex; gap: 12px; }
/* 品牌区:只放图标,隐藏文字 wordmark(减少拥挤) */
.navbar .logo-text { display: none; }
.navbar .logo-img {
    height: 34px;
    filter: drop-shadow(0 1px 3px rgba(0, 0, 0, 0.30));
}
.nav-link {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-on-dark-muted);
    transition: all 0.2s;
    position: relative;
}
.nav-link:hover { color: #fff; background: transparent; }
/* 当前页 = 洋红紫 2px 下划线点睛(不再填充胶囊) */
.nav-link.active { color: #fff; background: transparent; }
.nav-link.active::after {
    content: "";
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: 2px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
}

.nav-actions { display: flex; align-items: center; gap: 10px; }
/* 导航次级按钮(退出)= 弱一档的描边 ghost:与登录/地球同一形状语言,存在感降一级 */
.nav-actions .btn-ghost {
    height: 34px;
    padding: 0 12px;
    background: transparent;
    color: rgba(255, 255, 255, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 9px;
    box-shadow: none;
    font-family: var(--font-ui);
    font-size: 13px;
}
.nav-actions .btn-ghost:hover { background: rgba(255, 255, 255, 0.12); color: #fff; border-color: rgba(255, 255, 255, 0.35); }
/* 导航主 CTA(登录)= 幽灵描边,与地球语言切换器同一套形状语言
   (34px 高 / 1px 描边 / 圆角 9px / 同 hover);2026-09-02 由白底大按钮改版 */
.nav-actions .btn-primary {
    height: 34px;
    padding: 0 14px;
    background: transparent;
    color: rgba(255, 255, 255, 0.82);
    border: 1px solid rgba(255, 255, 255, 0.26);
    border-radius: 9px;
    box-shadow: none;
    font-family: var(--font-ui);
    font-size: 13px;
}
.nav-actions .btn-primary:hover { background: rgba(255, 255, 255, 0.12); color: #fff; border-color: rgba(255, 255, 255, 0.4); box-shadow: none; }
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    position: relative;
}
.menu-toggle.has-unread::after {
    content: '';
    position: absolute;
    top: 5px;
    right: 4px;
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: #ff4d5d;
    box-shadow: 0 0 0 2px var(--primary), 0 0 12px rgba(255, 77, 93, 0.65);
}
.menu-toggle span {
    width: 22px; height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: all 0.3s;
}
.menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero（深蓝封面背景） ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 24px 80px;
    background:
        radial-gradient(ellipse 60% 50% at 80% 20%, rgba(206, 87, 193, 0.18), transparent 60%),
        var(--gradient-primary);
    overflow: hidden;
    color: #fff;
}
.hero-bg { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
/* 飘浮符号用淡白 + 极少洋红紫 */

/* ============================================
   Hero 背景装饰：SVG 几何曲线 + 数学公式
   （仅首页大 Hero，分层错落，半透明不抢眼）
   ============================================ */
/* --- 第 1 层：SVG 几何曲线 --- */
/* 暂时关闭 SVG 装饰层，方案优化后再启用 */
.hero-curve {
    display: none;
    position: absolute;
    fill: none;
    stroke: rgba(255, 255, 255, 0.085);
    stroke-width: 1.5;
    pointer-events: none;
    z-index: 1;
    animation: drift 24s ease-in-out infinite;
}
.hero-curve--sine {
    width: 520px; max-width: 48vw;
    top: 14%; left: 4%;
    transform: rotate(-4deg);
    animation-delay: 0s;
}
.hero-curve--spiral {
    width: 240px; max-width: 22vw;
    bottom: 16%; right: 6%;
    stroke: rgba(206, 87, 193, 0.11);
    animation-delay: -6s;
}
.hero-curve--rose {
    width: 220px; max-width: 20vw;
    top: 60%; left: 7%;
    stroke: rgba(255, 255, 255, 0.07);
    animation-delay: -12s;
}
.hero-curve--circle {
    width: 260px; max-width: 24vw;
    top: 8%; right: 12%;
    stroke: rgba(206, 87, 193, 0.09);
    animation-delay: -18s;
}
.hero-curve--bell {
    width: 360px; max-width: 32vw;
    top: 64%; left: 42%;
    stroke: rgba(255, 255, 255, 0.10);
    stroke-width: 2;
    transform: rotate(-2deg);
    animation-delay: -9s;
}
.hero-curve--integral {
    width: 280px; max-width: 26vw;
    top: 12%; right: 28%;
    stroke: rgba(206, 87, 193, 0.14);
    stroke-width: 2;
    stroke-dasharray: 0;
    animation-delay: -3s;
}
.hero-curve--integral .area { stroke: none; }

/* --- 第 2 层：优美公式（KaTeX 字体） --- */
/* 暂时关闭公式装饰层，方案优化后再启用 */
.hero-formula {
    display: none;
    position: absolute;
    font-family: 'KaTeX', 'Times New Roman', serif;
    font-style: italic;
    color: rgba(255, 255, 255, 0.13);
    font-weight: 500;
    white-space: nowrap;
    user-select: none;
    pointer-events: none;
    z-index: 1;
    animation: float2 18s ease-in-out infinite;
}
.hero-formula sup, .hero-formula sub { font-size: 0.65em; }
.hero-formula.f1 { font-size: 26px; top: 22%; left: 6%; animation-delay: 0s; }
.hero-formula.f2 { font-size: 22px; top: 70%; left: 9%; animation-delay: -4s; }
.hero-formula.f3 { font-size: 24px; top: 30%; right: 8%; color: rgba(206, 87, 193, 0.16); animation-delay: -8s; }
.hero-formula.f4 { font-size: 23px; bottom: 22%; right: 7%; animation-delay: -12s; }
.hero-formula.f5 { font-size: 21px; top: 50%; right: 14%; color: rgba(206, 87, 193, 0.14); animation-delay: -2s; }
.hero-formula.f6 { font-size: 25px; bottom: 30%; left: 16%; animation-delay: -10s; }
/* 应用数学经典：傅里叶变换 / 拉普拉斯变换 / 微积分基本定理 / 泰勒展开 / 斯托克斯 / 特征值 */
.hero-formula.f7 { font-size: 20px; top: 12%; left: 38%; animation-delay: -14s; }
.hero-formula.f8 { font-size: 20px; top: 82%; left: 34%; color: rgba(206, 87, 193, 0.15); animation-delay: -5s; }
.hero-formula.f9 { font-size: 22px; top: 44%; left: 4%; animation-delay: -7s; }
.hero-formula.f10 { font-size: 19px; bottom: 12%; left: 42%; animation-delay: -16s; }
.hero-formula.f11 { font-size: 20px; top: 78%; right: 24%; animation-delay: -11s; }
.hero-formula.f12 { font-size: 22px; top: 18%; right: 30%; color: rgba(206, 87, 193, 0.15); animation-delay: -13s; }

@keyframes drift {
    0%, 100% { transform: translate(0, 0) rotate(var(--rot, 0deg)); opacity: 0.85; }
    50%      { transform: translate(12px, -16px) rotate(calc(var(--rot, 0deg) + 2deg)); opacity: 1; }
}
.hero-curve--sine { --rot: -4deg; }

@keyframes float2 {
    0%, 100% { transform: translate(0, 0); opacity: 0.7; }
    50%      { transform: translate(-10px, 12px); opacity: 1; }
}

/* 响应式：手机端隐藏部分装饰，保持简洁 */
/* 响应式与无障碍规则已统一收敛至文件末尾 */

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(20px, -30px) rotate(5deg); }
    50% { transform: translate(-15px, -15px) rotate(-3deg); }
    75% { transform: translate(-25px, 20px) rotate(4deg); }
}

.hero-content { position: relative; z-index: 2; max-width: 820px; }
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px 6px 8px;
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 24px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: fadeUp 0.8s ease both;
}
.hero-badge-logo {
    width: 30px;
    height: 30px;
    object-fit: contain;
    border-radius: 50%;
    filter: drop-shadow(0 1px 3px rgba(0, 0, 0, 0.3));
}
.hero-title {
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
    color: #fff;
    animation: fadeUp 0.8s ease 0.1s both;
}
/* 高亮文字 = 洋红紫点缀 */
.accent-text { color: var(--accent-light); }
.hero-subtitle {
    font-size: 18px;
    color: var(--text-on-dark-muted);
    max-width: 620px;
    margin: 0 auto 36px;
    animation: fadeUp 0.8s ease 0.2s both;
}
.hero-buttons {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 56px;
    animation: fadeUp 0.8s ease 0.3s both;
}
/* Hero 上的次级按钮 = 白色描边 */
.hero .btn-ghost {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px) saturate(1.3);
    -webkit-backdrop-filter: blur(10px) saturate(1.3);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.15);
}
.hero .btn-ghost:hover { background: rgba(255, 255, 255, 0.2); }

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ---------- 通用 Section ---------- */
.section { padding: 100px 0; position: relative; }
/* alt 区块底色 = 蓝调纸感(极浅品牌蓝),比中性灰更轻、与深蓝主色同调 */
.section-alt { background: #f8fafd; }
.section-header { text-align: left; max-width: 720px; margin: 0 0 40px; }
/* 区块标签 = eyebrow(洋红紫短线 + 大写 muted),去玻璃胶囊 */
.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    padding: 0;
    background: none;
    border: none;
    border-radius: 0;
    box-shadow: none;
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 12px;
}
.section-tag::before {
    content: "";
    width: 20px;
    height: 2px;
    background: var(--accent);
    display: inline-block;
    flex: none;
}
/* 学术衬线区块标题(不用字重 800) */
.section-title {
    font-family: var(--font-heading);
    font-size: clamp(24px, 2.6vw, 30px);
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 10px;
    color: var(--primary);
}
.section-desc { font-size: 14px; color: var(--text-secondary); }

/* ---------- 公告栏 ---------- */
.filter-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.filter-btn {
    padding: 8px 20px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(8px) saturate(1.15);
    -webkit-backdrop-filter: blur(8px) saturate(1.15);
    border: 1px solid rgba(255, 255, 255, 0.35);
    transition: all 0.25s;
    box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.25);
}
.filter-btn:hover { border-color: var(--accent); color: var(--accent-dark); }
/* 筛选激活 = 深蓝主色 */
.filter-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: transparent;
    box-shadow: var(--shadow-primary);
}

.notice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}
.notice-carousel-status {
    display: none;
}
.notice-carousel-status:not([hidden]) {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 14px;
}
.notice-carousel-dots {
    display: flex;
    align-items: center;
    gap: 7px;
}
.notice-carousel-dot {
    width: 7px;
    height: 7px;
    padding: 0;
    border: 0;
    border-radius: 999px;
    background: rgba(1, 5, 68, 0.16);
    cursor: pointer;
    transition: width 0.25s ease, background 0.25s ease, transform 0.25s ease;
}
.notice-carousel-dot.active {
    width: 22px;
    background: var(--accent);
    box-shadow: 0 6px 16px rgba(206, 87, 193, 0.28);
}
.notice-carousel-dot:hover {
    transform: translateY(-1px);
    background: rgba(206, 87, 193, 0.55);
}
.notice-carousel-dot:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}
.notice-carousel-index {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}
.notice-carousel-edge {
    width: 34px;
    height: 34px;
    display: inline-grid;
    place-items: center;
    border-radius: 999px;
    border: 1px solid rgba(1, 5, 68, 0.08);
    background: rgba(255, 255, 255, 0.62);
    color: rgba(1, 5, 68, 0.48);
    font-size: 24px;
    line-height: 1;
    box-shadow: 0 10px 26px rgba(1, 5, 68, 0.08);
    opacity: 0.45;
    transform: translateY(0);
    transition: opacity 0.2s ease, color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}
.notice-carousel-edge:hover,
.notice-carousel-edge:focus-visible {
    opacity: 1;
    color: var(--primary);
    background: #fff;
    transform: translateY(-1px);
}
/* 折叠状态：隐藏超出的卡片（由 JS 动态控制） */
.notice-card.notice-hidden { display: none; }
.notice-expand-btn {
    text-align: center;
    margin-top: 28px;
}
.notice-expand-btn .btn { min-width: 200px; }
.notice-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}
.notice-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: var(--primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s;
}
.notice-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.notice-card:hover::before { transform: scaleX(1); }

.notice-meta {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}
.notice-tag {
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
}
.notice-tag.activity { background: var(--primary-100); color: var(--primary); }
.notice-tag.competition { background: var(--accent-100); color: var(--accent-dark); }
.notice-tag.notice { background: rgba(42, 47, 110, 0.1); color: var(--primary-light); }
.notice-grade-tag {
    padding: 5px 12px;
    border-radius: 999px;
    background: rgba(206, 87, 193, 0.10);
    color: var(--accent-dark);
    font-size: 12px;
    font-weight: 800;
    white-space: nowrap;
}
.notice-grade-tag--all {
    background: rgba(1, 5, 68, 0.07);
    color: var(--text-muted);
}
.notice-date {
    margin-left: auto;
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 700;
    white-space: nowrap;
}
.notice-card h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.4;
    color: var(--primary);
}
.notice-card p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 18px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.notice-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}
.notice-author {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-secondary);
}
.author-avatar {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: grid;
    place-items: center;
    font-weight: 700;
    font-size: 13px;
}
.notice-link {
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
}
/* 链接悬停 = 洋红紫 */
.notice-link:hover { color: var(--accent); }
.notice-card.featured {
    grid-column: span 2;
    /* 深蓝渐变，降低饱和度 + 提亮，比满版纯深蓝柔和 */
    background: linear-gradient(135deg, #1a2563 0%, #2d3a8a 100%);
    color: #fff;
    box-shadow: 0 8px 28px rgba(1, 5, 68, 0.18);
}
/* featured 卡的顶部色条：品红，从左展开（与普通卡动效一致） */
.notice-card.featured::before {
    display: block;
    background: var(--accent);
    box-shadow: 0 0 12px rgba(206, 87, 193, 0.5);
}
.notice-card.featured:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(1, 5, 68, 0.3);
}
.notice-card.featured h3 { color: #fff; }
.notice-card.featured p { color: rgba(255, 255, 255, 0.78); }
.notice-card.featured .notice-tag { background: rgba(255,255,255,0.18); color: #fff; }
.notice-card.featured .notice-grade-tag { background: rgba(255,255,255,0.14); color: rgba(255,255,255,0.9); }
.notice-card.featured .notice-date,
.notice-card.featured .notice-author { color: rgba(255, 255, 255, 0.72); }
.notice-card.featured .notice-footer { border-top-color: rgba(255,255,255,0.15); }
.notice-card.featured .notice-link { color: var(--accent-light); }
.notice-card.featured .notice-link:hover { color: #fff; }
.notice-card.featured .author-avatar { background: var(--gradient-accent); }

/* —— 紧急公告（priority-urgent）：浅品红渐变 + 品红顶条 —— */
.notice-card.priority-urgent::before {
    background: var(--accent);
    box-shadow: 0 0 12px rgba(206, 87, 193, 0.6);
}
.notice-card.priority-urgent {
    background: linear-gradient(135deg, #fdf2fa, #f9e0f3);
    border-color: rgba(206, 87, 193, 0.2);
}
.notice-card.priority-urgent h3 { color: #7a2c6e; }

/* —— 优先级角标：跟日期同处信息流，避免桌面/手机端与日期重叠 —— */
.notice-card { position: relative; }
.notice-badge {
    flex: 0 0 auto;
    font-size: 11px;
    font-weight: 800;
    padding: 4px 10px;
    border-radius: 999px;
    letter-spacing: 0.05em;
    white-space: nowrap;
}
.notice-badge-urgent {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 2px 8px rgba(206, 87, 193, 0.4);
    animation: badgePulse 2s ease-in-out infinite;
}
.notice-badge-important {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 2px 8px rgba(206, 87, 193, 0.4);
}
@keyframes badgePulse {
    0%, 100% { box-shadow: 0 2px 8px rgba(206, 87, 193, 0.4); }
    50% { box-shadow: 0 2px 16px rgba(206, 87, 193, 0.7); }
}

/* —— 公告"查看更多"入口 —— */
.notice-more {
    text-align: center;
    margin-top: 32px;
    padding-top: 24px;
}

/* 空状态：跨整行、居中、带图标与提示 */
.notice-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 56px 24px;
    color: var(--text-muted);
}
.notice-empty-icon { font-size: 44px; margin-bottom: 12px; opacity: 0.7; }
.notice-empty-text { font-size: 16px; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; }
.notice-empty-hint { font-size: 13px; color: var(--text-muted); }

/* ============================================
   公告 changelog 布局（notices.html，2026-07-11 重设计：
   左时间线主列（竖线+类型色节点）+ 右筛选侧栏）
   ============================================ */
.notice-cl-layout {
    display: flex;
    gap: 56px;
    align-items: flex-start;
}
.notice-cl-main { flex: 1; min-width: 0; }
.notice-cl-aside {
    flex: 0 0 190px;
    position: sticky;
    top: 96px;
    border-left: 1px solid var(--border);
    padding-left: 28px;
}
.notice-cl-filter-title {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 8px;
}
.notice-cl-aside .filter-group {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    margin-bottom: 26px;
}
.notice-cl-aside .filter-btn {
    background: none;
    border: none;
    box-shadow: none;
    border-radius: 0;
    padding: 5px 0;
    font-size: 13.5px;
    color: var(--text-secondary);
    text-align: left;
    transition: color .2s ease;
}
.notice-cl-aside .filter-btn:hover { color: var(--primary); background: none; }
.notice-cl-aside .filter-btn.active {
    color: var(--primary);
    font-weight: 600;
    background: none;
    box-shadow: none;
}
.notice-cl-count { font-size: 12.5px; color: var(--text-muted); margin-bottom: 22px; }

.notice-cl-group { margin-bottom: 42px; }
.notice-cl-group:last-child { margin-bottom: 0; }
.notice-cl-heading {
    font-size: 13.5px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 18px;
}
.notice-cl-list {
    border-left: 2px solid var(--border);
    padding-left: 30px;
}
.notice-cl-item {
    display: block;
    position: relative;
    padding-bottom: 34px;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}
.notice-cl-list .notice-cl-item:last-child { padding-bottom: 6px; }
.notice-cl-dot {
    position: absolute;
    left: -37px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #fff;
    border: 2.5px solid var(--primary);
}
.notice-cl-dot.activity { border-color: var(--blue); }
.notice-cl-dot.competition { border-color: var(--cyan); }
.notice-cl-dot.notice { border-color: var(--primary); }
.notice-cl-meta {
    font-size: 12.5px;
    color: var(--text-muted);
    margin-bottom: 6px;
    font-variant-numeric: tabular-nums;
}
.notice-cl-meta .notice-cl-pri--urgent { color: var(--accent-dark); font-weight: 600; }
.notice-cl-meta .notice-cl-pri--important { color: var(--blue); font-weight: 600; }
.notice-cl-title {
    font-family: var(--font-heading);
    font-size: 19px;
    font-weight: 600;
    color: var(--primary);
    margin: 0 0 6px;
    line-height: 1.45;
    transition: color .2s ease;
}
.notice-cl-item:hover .notice-cl-title { color: var(--blue); }
.notice-cl-excerpt {
    font-size: 13.5px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0 0 10px;
    max-width: 78ch;
}
.notice-cl-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.notice-cl-tag {
    font-size: 11px;
    font-weight: 500;
    padding: 2px 9px;
    border-radius: 6px;
    background: var(--bg-alt);
    color: var(--text-secondary);
}
.notice-cl-tag--activity { background: rgba(0, 113, 184, 0.1); color: #0a5e97; }
.notice-cl-tag--competition { background: rgba(0, 159, 197, 0.12); color: #0a6478; }
.notice-cl-tag--notice { background: var(--primary-100); color: var(--primary); }
.notice-cl-item.notice-hidden { display: none; }

@media (max-width: 900px) {
    .notice-cl-layout { flex-direction: column-reverse; gap: 28px; }
    .notice-cl-aside {
        position: static;
        border-left: none;
        padding-left: 0;
        width: 100%;
        flex: none;
    }
    .notice-cl-aside .filter-group {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 4px 16px;
        margin-bottom: 14px;
    }
}
@media (max-width: 560px) {
    .notice-cl-list { padding-left: 22px; }
    .notice-cl-dot { left: -29px; width: 10px; height: 10px; }
    .notice-cl-title { font-size: 16.5px; }
    .notice-cl-excerpt {
        font-size: 12.5px;
        display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .notice-cl-item { padding-bottom: 24px; }
}

@media (min-width: 901px) {
    .notice-grid.notice-desktop-carousel {
        display: block;
        position: relative;
        overflow: hidden;
        isolation: isolate;
        cursor: grab;
    }

    .notice-grid.notice-desktop-carousel.is-dragging {
        cursor: grabbing;
    }

    .notice-grid.notice-desktop-carousel .api-stale-hint {
        margin-bottom: 16px;
    }

    .notice-carousel-track {
        display: flex;
        width: 100%;
        transition: transform 0.66s cubic-bezier(0.22, 0.72, 0.18, 1);
        will-change: transform;
    }

    .notice-grid.notice-desktop-carousel.is-dragging .notice-carousel-track {
        transition-duration: 0.08s;
    }

    .notice-carousel-page {
        flex: 0 0 100%;
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 24px;
        padding: 1px 1px 6px;
        align-items: start;
        grid-auto-rows: auto;
        transition: opacity 0.42s ease, filter 0.42s ease;
    }

    .notice-grid.notice-desktop-carousel .notice-carousel-page:not(.is-active) {
        opacity: 0.42;
        filter: blur(2px);
        pointer-events: none;
    }

    .notice-grid.notice-desktop-carousel .notice-carousel-page.is-active {
        opacity: 1;
        filter: none;
    }

    .notice-carousel-page--count-4 .notice-card:nth-child(1) { grid-column: 1 / 2; grid-row: 1; }
    .notice-carousel-page--count-4 .notice-card:nth-child(2) { grid-column: 2 / 4; grid-row: 1; }
    .notice-carousel-page--count-4 .notice-card:nth-child(3) { grid-column: 1 / 3; grid-row: 2; }
    .notice-carousel-page--count-4 .notice-card:nth-child(4) { grid-column: 3 / 4; grid-row: 2; }

    .notice-carousel-page--count-1 .notice-card:nth-child(1) { grid-column: 1 / 2; grid-row: 1; }
    .notice-carousel-page--count-2 .notice-card:nth-child(1) { grid-column: 1 / 2; grid-row: 1; }
    .notice-carousel-page--count-2 .notice-card:nth-child(2) { grid-column: 2 / 3; grid-row: 1; }
    .notice-carousel-page--count-3 .notice-card:nth-child(1) { grid-column: 1 / 2; grid-row: 1; }
    .notice-carousel-page--count-3 .notice-card:nth-child(2) { grid-column: 2 / 3; grid-row: 1; }
    .notice-carousel-page--count-3 .notice-card:nth-child(3) { grid-column: 3 / 4; grid-row: 1; }

    .notice-grid.notice-desktop-carousel .notice-card,
    .notice-grid.notice-desktop-carousel .notice-card.featured {
        min-height: 0;
        height: auto;
        display: block;
    }

    .notice-grid.notice-desktop-carousel .notice-carousel-page .notice-card:nth-child(2),
    .notice-grid.notice-desktop-carousel .notice-carousel-page .notice-card:nth-child(3) {
        padding: 28px;
    }

    .notice-grid.notice-desktop-carousel .notice-card h3 {
        font-size: 19px;
        line-height: 1.35;
    }

    .notice-grid.notice-desktop-carousel .notice-carousel-page .notice-card:nth-child(2) h3,
    .notice-grid.notice-desktop-carousel .notice-carousel-page .notice-card:nth-child(3) h3 {
        font-size: 19px;
    }

    .notice-grid.notice-desktop-carousel .notice-card p {
        font-size: 14px;
        line-height: 1.6;
        -webkit-line-clamp: 2;
    }

    .notice-grid.notice-desktop-carousel .notice-footer {
        margin-top: 0;
    }

    .notice-grid.notice-desktop-carousel + .notice-carousel-status:not([hidden]) {
        margin-top: 18px;
    }

    .notice-grid.notice-desktop-carousel ~ .notice-expand-btn {
        display: none !important;
    }
}

/* ---------- 资料下载 ---------- */
.download-tabs {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}
.tab-btn {
    padding: 10px 22px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.25s;
}
.tab-btn:hover { color: var(--primary); }
/* 标签激活 = 深蓝主色 */
.tab-btn.active {
    background: var(--primary);
    color: #fff;
    box-shadow: var(--shadow-primary);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}
.resource-entry-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    max-width: 980px;
    margin: 0 auto;
}
/* 首页资料「展开更多」入口（横跨整行，居中） */
.download-more-wrap {
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    padding: 8px 0 4px;
}
.download-card {
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding: 22px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all 0.3s;
}
.download-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}
.download-card-top {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}
.download-card-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
}
.file-icon {
    flex-shrink: 0;
    width: 52px; height: 64px;
    border-radius: 8px;
    display: grid;
    place-items: center;
    font-size: 11px;
    font-weight: 700;
    color: #fff;
    position: relative;
    box-shadow: var(--shadow-sm);
}
.file-icon::after {
    content: '';
    position: absolute;
    top: 0; right: 0;
    border-style: solid;
    border-width: 0 12px 12px 0;
    border-color: transparent rgba(255,255,255,0.3) transparent transparent;
}
.file-icon.pdf { background: #d63b3b; }
.file-icon.doc { background: var(--primary); }
.file-icon.zip { background: #d98324; }
.file-icon.xls { background: #1d8a52; }

.file-info { flex: 1; min-width: 0; }
.file-info h4 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--primary);
}
.file-meta {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 6px;
}
.file-meta span { display: inline-flex; align-items: center; gap: 4px; }
.file-verified {
    font-size: 12px;
    color: var(--primary);
    font-weight: 600;
}
.download-btn {
    flex-shrink: 0;
    min-width: 40px;
    height: 40px;
    padding: 0 14px;
    border-radius: 8px;
    background: var(--primary-100);
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    font-size: 14px;
    font-weight: 700;
    font-family: inherit;
    border: none;
    cursor: pointer;
    transition: all 0.25s;
}
/* 下载按钮悬停 = 洋红紫点缀 */
.download-btn:hover {
    background: var(--accent);
    color: #fff;
    transform: scale(1.05);
}

/* —— 资料锁定状态（未登录时的私密资料）—— */
.download-card-locked {
    opacity: 0.78;
    background: repeating-linear-gradient(
        135deg,
        rgba(206, 87, 193, 0.04) 0,
        rgba(206, 87, 193, 0.04) 10px,
        transparent 10px,
        transparent 20px
    );
}
.download-btn-locked {
    background: rgba(206, 87, 193, 0.15);
    color: var(--accent);
}
.download-btn-locked:hover {
    background: var(--accent);
    color: #fff;
}
/* —— 资料积分兑换状态 —— */
/* 积分价格标签（品红） */
.download-points-tag {
    display: inline-block;
    font-size: 10px;
    font-weight: 700;
    color: #fff;
    background: var(--accent);
    padding: 2px 7px;
    border-radius: 4px;
    margin-left: 6px;
    vertical-align: middle;
}
/* 已兑换标签（绿色，区别于锁定/积分） */
.download-purchased-tag {
    display: inline-block;
    font-size: 10px;
    font-weight: 700;
    color: #1a7a3a;
    background: rgba(26, 122, 58, 0.12);
    padding: 2px 7px;
    border-radius: 4px;
    margin-left: 6px;
    vertical-align: middle;
}
/* 积分兑换卡片：品红虚线底纹 */
.download-card-points {
    background: repeating-linear-gradient(
        135deg,
        rgba(206, 87, 193, 0.06) 0,
        rgba(206, 87, 193, 0.06) 10px,
        transparent 10px,
        transparent 20px
    );
}
/* 积分购买按钮 */
.download-btn-points {
    background: rgba(206, 87, 193, 0.12);
    color: var(--accent);
    font-weight: 700;
    font-size: 13px;
    padding: 8px 14px;
}
.download-btn-points:hover {
    background: var(--accent);
    color: #fff;
    transform: scale(1.08);
}

/* —— 导航栏登录态 UI（用户名 + 退出）—— */
.nav-guest, .nav-user {
    display: flex;
    align-items: center;
    gap: 10px;
}
.nav-username {
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.nav-user #logoutBtn {
    display: none;
}
.profile-page .nav-user #logoutBtn {
    display: inline-flex;
}
.btn-sm {
    padding: 6px 14px;
    font-size: 13px;
}

/* ---------- 数学拓展 ---------- */
.extension-wrapper { max-width: 920px; margin: 0 auto; }
.extension-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}
.ext-card {
    text-align: left;
    padding: 40px 32px;
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}
.ext-card::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.35s;
    z-index: 0;
}
.ext-card--applied::before { background: linear-gradient(135deg, var(--primary-50), var(--primary-100)); }
.ext-card--pure::before { background: linear-gradient(135deg, var(--accent-50), var(--accent-100)); }
.ext-card > * { position: relative; z-index: 1; }
.ext-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.ext-card:hover::before { opacity: 1; }
.ext-card.expanded { border-width: 2px; }
.ext-card--applied.expanded { border-color: var(--primary); background: linear-gradient(135deg, #f0f2fb, #e6e9f7); }
.ext-card--pure.expanded { border-color: var(--accent); background: linear-gradient(135deg, #fbf0f9, #f7e6f4); }

.ext-icon {
    width: 64px; height: 64px;
    border-radius: 18px;
    display: grid;
    place-items: center;
    font-size: 32px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}
/* 应用数学图标 = 深蓝 */
.ext-card--applied .ext-icon { background: var(--gradient-primary); }
/* 纯数学图标 = 洋红紫（单一点缀点） */
.ext-card--pure .ext-icon { background: var(--gradient-accent); }
.ext-title { font-family: var(--font-heading); font-size: 22px; font-weight: 600; margin-bottom: 4px; color: var(--primary); }
.ext-desc { font-size: 14px; color: var(--text-secondary); margin-bottom: 24px; line-height: 1.6; }
.ext-toggle {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
}
.ext-card--applied .ext-toggle { color: var(--primary); }
.ext-card--pure .ext-toggle { color: var(--accent-dark); }
.ext-toggle .arrow {
    display: inline-block;
    width: 8px; height: 8px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg);
    transition: transform 0.3s;
    margin-bottom: 3px;
}
.ext-card.expanded .ext-toggle .arrow { transform: rotate(-135deg); margin-bottom: -3px; }

/* 子版块展开区 */
.subsections {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1), margin 0.5s;
}
.subsections.open {
    max-height: 800px;
    margin-top: 24px;
}
.subsections-inner {
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px dashed var(--border-strong);
    animation: fadeIn 0.4s ease;
}
#applied-subs .subsections-inner { background: linear-gradient(135deg, #f0f2fb, #ffffff); border-color: var(--primary-200); }
#pure-subs .subsections-inner { background: linear-gradient(135deg, #fbf0f9, #ffffff); border-color: var(--accent-100); }
.subsections-label {
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}
#applied-subs .subsections-label { color: var(--primary); }
#pure-subs .subsections-label { color: var(--accent-dark); }

.subsection-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 14px;
}
.subsection {
    display: flex;
    gap: 14px;
    padding: 16px;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: all 0.25s;
    align-items: flex-start;
}
.subsection:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow);
}
#applied-subs .subsection:hover { border-color: var(--primary-light); }
#pure-subs .subsection:hover { border-color: var(--accent); }
.sub-icon {
    flex-shrink: 0;
    width: 40px; height: 40px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    font-size: 18px;
    background: var(--bg-alt);
    transition: all 0.25s;
}
#applied-subs .subsection:hover .sub-icon { background: var(--primary-100); }
#pure-subs .subsection:hover .sub-icon { background: var(--accent-100); }
.subsection h5 { font-size: 15px; font-weight: 700; margin-bottom: 3px; color: var(--primary); }
.subsection p { font-size: 12px; color: var(--text-muted); line-height: 1.5; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }

/* ---------- 关于我们 ---------- */
.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 60px;
    align-items: center;
}
.about-text {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 15px;
}
.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 28px;
}
.feature {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
}
.feature span {
    width: 22px; height: 22px;
    border-radius: 50%;
    background: var(--accent-100);
    color: var(--accent-dark);
    display: grid;
    place-items: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

.about-visual {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
/* 公式卡 = 深蓝为主，中间一张用洋红紫点缀 */
.formula-card {
    padding: 28px 32px;
    border-radius: var(--radius);
    text-align: center;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}
.formula-card:hover { transform: translateX(-6px); box-shadow: var(--shadow-md); }
.formula-card:nth-child(1) { background: var(--gradient-primary); color: #fff; }
.formula-card:nth-child(2) { background: var(--gradient-accent); color: #fff; }
.formula-card:nth-child(3) { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
.formula-line {
    font-family: 'KaTeX', 'Times New Roman', serif;
    font-style: italic;
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 6px;
}
.formula-card:nth-child(3) .formula-line { color: var(--primary); }
.formula-name { font-size: 13px; opacity: 0.85; font-weight: 500; }
.formula-card:nth-child(3) .formula-name { color: var(--text-muted); opacity: 1; }

/* ---------- 页脚（深蓝主色） ---------- */
.footer {
    position: relative;
    overflow: hidden;
    background: var(--primary);
    color: #c8cee0;
    padding: 64px 0 24px;
}
/* 校园线稿点缀：左下角淡出，随视口宽度等比缩放，不压文字 */
.footer-illo {
    position: absolute;
    left: -20px;
    bottom: -18px;
    width: clamp(460px, 34vw, 780px);
    opacity: 0.62;
    pointer-events: none;
    z-index: 0;
    -webkit-mask-image: linear-gradient(100deg, rgba(0,0,0,1) 55%, rgba(0,0,0,0) 96%);
    mask-image: linear-gradient(100deg, rgba(0,0,0,1) 55%, rgba(0,0,0,0) 96%);
}
.footer > .container { position: relative; z-index: 1; }
.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1.15fr;
    gap: 28px;
    padding-left: clamp(240px, 24vw, 420px);
    margin-bottom: 40px;
}
.footer-brand .logo { margin-bottom: 14px; }
.footer-brand .logo-title { color: #fff; }
/* 完整版 logo(图标+社名合一，不再额外拼英文/中文文字)，放在联系信息下方 */
.footer-brand .logo--full { margin: 20px 0 0; }
.footer-brand .logo-img.logo-img--full {
    width: auto;
    height: clamp(72px, 6vw, 88px);
}
.footer-brand p { font-size: 14px; font-style: italic; max-width: 300px; margin: 4px 0 0; line-height: 1.7; color: rgba(226, 231, 250, 0.78); }
.social-links { display: flex; align-items: center; gap: 10px; }
.social-links a {
    min-width: 38px; height: 38px;
    padding: 0 10px;
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.2);
    background: transparent;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    transition: all 0.25s;
    cursor: pointer;
    color: #c8cee0;
}
.social-links a:hover { border-color: rgba(255,255,255,0.6); color: #fff; background: rgba(255,255,255,0.06); transform: translateY(-2px); }
/* 品牌图标大小(线性 Tabler 图标 + 小红书线稿字标：字标是横向文字图形，按高度缩放，不挤进圆形徽标) */
.social-links a i { font-size: 17px; transition: transform 0.25s; }
.social-links a img { width: auto; height: 15px; display: block; object-fit: contain; transition: transform 0.25s; }
.social-links a:hover i,
.social-links a:hover img { transform: scale(1.1); }
.footer-col h5 {
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.footer-col a {
    display: block;
    font-size: 14px;
    padding: 3px 0;
    color: #9aa2bd;
    transition: color 0.2s;
}
/* 页脚链接悬停 = 洋红紫 */
.footer-col a:hover { color: var(--accent-light); }
.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    font-size: 13px;
    color: #6b7390;
}
.contact-card {
    position: fixed;
    left: 50%;
    bottom: 26px;
    z-index: 1400;
    width: min(360px, calc(100vw - 32px));
    transform: translateX(-50%);
    padding: 18px;
    border-radius: 14px;
    background: #fff;
    color: var(--text);
    border: 1px solid rgba(1, 5, 68, 0.08);
    box-shadow: 0 24px 70px rgba(1, 5, 68, 0.2);
}
.contact-card strong {
    display: block;
    color: var(--primary);
    font-size: 17px;
    margin-bottom: 6px;
}
.contact-card span {
    display: block;
    color: var(--accent);
    font-weight: 800;
    margin-bottom: 8px;
}
.contact-card p {
    margin: 0 34px 14px 0;
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.65;
}
.contact-card-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 28px;
    height: 28px;
    border: 0;
    border-radius: 50%;
    background: rgba(1, 5, 68, 0.06);
    color: var(--primary);
    cursor: pointer;
    font-size: 18px;
    line-height: 1;
}
.contact-card-close:hover {
    background: rgba(206, 87, 193, 0.12);
}

/* ---------- 登录弹窗 ---------- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(1, 5, 68, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}
.modal-overlay.open { opacity: 1; visibility: visible; }
.modal {
    width: 100%;
    max-width: 440px;
    max-height: 90vh;
    overflow-y: auto;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    position: relative;
    box-shadow: var(--shadow-lg);
    transform: scale(0.92) translateY(20px);
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.modal-overlay.open .modal { transform: scale(1) translateY(0); }
.modal-close {
    position: absolute;
    top: 18px; right: 18px;
    width: 36px; height: 36px;
    border-radius: 50%;
    font-size: 24px;
    color: var(--text-muted);
    display: grid;
    place-items: center;
    transition: all 0.2s;
    line-height: 1;
}
.modal-close:hover { background: var(--bg-alt); color: var(--primary); }
.modal-tabs {
    display: flex;
    gap: 4px;
    background: var(--bg-alt);
    padding: 5px;
    border-radius: var(--radius-sm);
    margin-bottom: 28px;
}
/* 登录弹窗顶栏：tab 胶囊与关闭按钮同排共线，× 不再悬浮遮挡 tab */
.modal-topbar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 28px;
}
.modal-topbar .modal-tabs { flex: 1; margin-bottom: 0; }
.modal-topbar .modal-close { position: static; flex: none; }
.modal-tab {
    flex: 1;
    padding: 9px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.25s;
}
/* 弹窗标签激活 = 深蓝 */
.modal-tab.active { background: var(--surface); color: var(--primary); box-shadow: var(--shadow-sm); }
.auth-form { display: none; }
.auth-form.active { display: block; animation: fadeIn 0.3s ease; }
.auth-header { margin-bottom: 24px; }
.auth-header h2 {
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--primary);
}
.auth-header p { font-size: 14px; color: var(--text-muted); }
/* 「暂未开放」提示弹窗：大图标 + 居中标题（忘记密码等） */
.auth-notice { text-align: center; padding-top: 6px; }
.auth-notice-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: var(--bg-alt);
    color: var(--primary);
    font-size: 30px;
}
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-secondary);
}
.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    transition: all 0.2s;
    background: var(--bg-alt);
}
/* 输入框聚焦 = 深蓝主色 */
.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--surface);
    box-shadow: 0 0 0 4px var(--primary-100);
}
.form-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 16px 0 22px;
    font-size: 13px;
}
.checkbox {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 13px;
}
.checkbox input { width: 16px; height: 16px; accent-color: var(--primary); }
.link { color: var(--primary); font-weight: 600; }
.link:hover { color: var(--accent); text-decoration: underline; }
.auth-divider {
    display: flex;
    align-items: center;
    gap: 14px;
    margin: 20px 0;
    color: var(--text-muted);
    font-size: 12px;
}
.auth-divider::before, .auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

/* ---------- Toast ---------- */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: #fff;
    padding: 14px 24px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 3000;
    max-width: 90%;
    /* 用 opacity + visibility 隐藏，避免 translateY 位移时内容过长露出底部一条 */
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.toast.show {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}
.toast.success { background: #1d8a52; }
.toast.error { background: #d63b3b; }

/* ---------- 响应式 ---------- */
/* 桌面端默认隐藏手机端认证按钮区（防闪烁） */
.nav-mobile-auth { display: none; }
.nav-mobile-notification-link {
    position: relative;
}
.nav-mobile-notification-link .nav-mobile-dot {
    display: none;
    width: 8px;
    height: 8px;
    margin-left: 8px;
    border-radius: 999px;
    background: #ff4d5d;
    box-shadow: 0 0 10px rgba(255, 77, 93, 0.65);
}
.nav-mobile-notification-link.has-unread .nav-mobile-dot {
    display: inline-block;
}

/* 滚动条美化 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg-alt); }
::-webkit-scrollbar-thumb { background: #c1c8de; border-radius: 10px; border: 2px solid var(--bg-alt); }
::-webkit-scrollbar-thumb:hover { background: var(--primary-light); }

/* 选中文本 */
::selection { background: var(--accent-100); color: var(--primary); }

/* ============================================
   玻璃拟态 (Glassmorphism) 透明效果
   ============================================ */
.glass {
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(16px) saturate(1.2);
    -webkit-backdrop-filter: blur(16px) saturate(1.2);
    border: 1px solid rgba(255, 255, 255, 0.35);
    box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.25), 0 4px 16px rgba(1, 5, 68, 0.06);
}
/* 深色背景上的玻璃效果 */
.glass--dark {
    background: rgba(1, 5, 68, 0.35);
    backdrop-filter: blur(16px) saturate(1.3);
    -webkit-backdrop-filter: blur(16px) saturate(1.3);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: #fff;
    box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.08), 0 4px 16px rgba(0, 0, 0, 0.15);
}
/* 浅色卡片玻璃态：半透明白底 + 模糊 + 内高光（用于小卡片/标签/按钮） */
.glass-card {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px) saturate(1.15);
    -webkit-backdrop-filter: blur(10px) saturate(1.15);
    border: 1px solid rgba(255, 255, 255, 0.4);
    box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.3), var(--shadow-sm);
}

/* ============================================
   Logo 无符号样式（logo-text--solo）
   ============================================ */
.logo-text--solo .logo-title {
    font-size: 19px;
    letter-spacing: -0.02em;
}
.logo-text--solo .logo-subtitle {
    font-size: 11px;
    opacity: 0.7;
}

/* ============================================
   Logo 图片样式（XJTLU Math Club 徽标）
   深蓝导航栏 + 深蓝页脚上展示白底蓝字徽标
   ============================================ */
.logo-img {
    width: auto;
    height: 38px;
    object-fit: contain;
    /* 反白图标,深蓝上无需投影勾边 */
    filter: none;
    flex-shrink: 0;
    transition: transform 0.3s ease, filter 0.3s ease;
}
.logo:hover .logo-img {
    transform: scale(1.06);
    filter: none;
}
/* 页脚小尺寸版本 */
.footer-brand .logo-img {
    width: auto;
    height: 46px;
    margin-bottom: 4px;
}

/* ============================================
   首页 - Continue Learning 入口卡片
   ============================================ */
/* 持续学习：左双入口卡 + 右校园线稿 */
.ext-split {
    display: flex;
    align-items: center;
    gap: 36px;
}
.extension-entry {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    flex: 1;
    min-width: 0;
    margin: 0;
}
.home-page #extension { overflow: clip; }
.ext-illo {
    position: relative;
    flex: 0 0 clamp(310px, 28vw, 460px);
    margin-right: calc(clamp(56px, 6vw, 110px) * -1);
    background: #5267a8;
    mix-blend-mode: multiply;
    -webkit-mask-image:
        linear-gradient(90deg, transparent 0, #000 12%, #000 100%),
        linear-gradient(180deg, #000 0, #000 68%, transparent 100%);
    -webkit-mask-composite: source-in;
    mask-image:
        linear-gradient(90deg, transparent 0, #000 12%, #000 100%),
        linear-gradient(180deg, #000 0, #000 68%, transparent 100%);
    mask-composite: intersect;
}
.ext-illo img {
    width: 100%;
    height: auto;
    display: block;
    opacity: 1;
    mix-blend-mode: screen;
}
@media (max-width: 900px) {
    .ext-illo {
        display: none;
        margin-right: 0;
    }
}
.entry-card {
    display: flex;
    flex-direction: column;
    padding: 30px 28px;
    border-radius: var(--radius);
    background: #fff;
    border: 0.5px solid var(--border);
    box-shadow: none;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    transition: border-color 0.25s ease;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    color: var(--text);
}
.entry-card::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.25s;
    z-index: 0;
    border-radius: var(--radius-lg);
}
.entry-card > * { position: relative; z-index: 1; }
/* hover 不上浮、不加阴影,只加深边框 + 铺同色浅渐变,与全页轻量语言一致 */
.entry-card:hover { border-color: var(--border-strong); }
.entry-card:hover::before { opacity: 1; }

/* 两张入口卡统一深蓝系,不再一蓝一紫 */
.entry-card--applied::before,
.entry-card--pure::before { background: linear-gradient(135deg, var(--primary-50), var(--primary-100)); }
.entry-card--applied:hover,
.entry-card--pure:hover { border-color: var(--primary-light); }

.entry-head {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}
.entry-count {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}
.entry-arrow {
    margin-left: auto;
    font-size: 20px;
    font-weight: 400;
    color: var(--text-muted);
    transition: all 0.3s;
}
.entry-card:hover .entry-arrow {
    transform: translateX(4px);
    color: var(--primary);
}
.entry-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 20px;
}
.entry-tags span {
    padding: 5px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    background: var(--bg-alt);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

/* ============================================
   关于我们 - 部门设置
   ============================================ */
.about-features--center {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px 32px;
    max-width: 680px;
    margin: 0 auto;
}

/* ============================================
   子页面 - Hero (sub-hero)
   ============================================ */
.sub-hero {
    position: relative;
    min-height: 460px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: left;
    padding: 140px 24px 84px;
    background: linear-gradient(135deg, #00032f 0%, #070c46 52%, #16265f 100%);
    color: #fff;
    overflow: hidden;
    isolation: isolate;
}
/* 静态公式纹理:黑板母题,低透明度铺底(替代飘浮符号) */
.sub-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 0;
    background: url('../images/hero-math-blackboard-v1.webp') center / cover no-repeat;
    opacity: 0.15;
    filter: grayscale(1) brightness(1.55) contrast(1.12);
    transform: scale(1.06);
    pointer-events: none;
}
/* 深蓝渐变压底,保证前景文字对比度 */
.sub-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
    background: linear-gradient(100deg, rgba(1, 5, 68, 0.74) 0%, rgba(1, 5, 68, 0.44) 52%, rgba(30, 51, 116, 0.32) 100%);
    pointer-events: none;
}
.sub-hero > * { position: relative; z-index: 2; }
.sub-hero .hero-bg { display: none; }
.sub-hero-content {
    position: relative;
    z-index: 2;
    max-width: 1152px;
    width: 100%;
    margin: 0 auto;
}
.module-detail-hero {
    min-height: 400px;
    padding: 128px 24px 48px;
}
.module-detail-hero-content {
    max-width: var(--reading-width);
}
.module-detail-hero .hero-title {
    margin-bottom: 20px;
}
.module-detail-hero .hero-subtitle {
    display: none;
}
.module-detail-body {
    --module-content-width: var(--reading-width);
    padding-top: 64px;
}

/* 面包屑 */
.breadcrumb {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px;
    border-radius: 999px;
    font-size: 13px;
    margin-bottom: 24px;
}
.breadcrumb a {
    color: var(--text-on-dark-muted);
    transition: color 0.2s;
}
.breadcrumb a:hover { color: #fff; }
.breadcrumb-sep { color: rgba(255,255,255,0.35); font-weight: 400; }
.breadcrumb-current { color: #fff; font-weight: 600; }

/* ============================================
   子页 Hero 统一改造 — 公式纹理 + 学术衬线
   (定稿设计:去玻璃/去 emoji/去飘浮符号,eyebrow + 衬线标题)
   ============================================ */
.sub-hero .breadcrumb {
    display: flex;
    flex-wrap: wrap;
    background: none;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
    border: none;
    box-shadow: none;
    padding: 0;
    border-radius: 0;
    margin-bottom: 22px;
    gap: 8px;
    color: rgba(255, 255, 255, 0.62);
}
.sub-hero .breadcrumb a { color: rgba(255, 255, 255, 0.62); }
.sub-hero .breadcrumb a:hover { color: #fff; }
.sub-hero .breadcrumb-sep { color: rgba(255, 255, 255, 0.32); }
.sub-hero .breadcrumb-current { color: #fff; }

/* Eyebrow 标签(方案 C:纯标签、无紫线、更淡;紫色点睛下移到标题) */
.sub-hero .hero-badge {
    display: inline-block;
    padding: 0;
    background: none;
    border: none;
    border-radius: 0;
    box-shadow: none;
    color: rgba(255, 255, 255, 0.55);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 14px;
}
.sub-hero .hero-badge::before { content: none; }

/* 学术衬线标题 + 洋红紫下划线点睛(方案 C) */
.sub-hero .hero-title {
    display: inline-block;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: clamp(34px, 5vw, 52px);
    letter-spacing: -0.01em;
    line-height: 1.12;
    color: #fff;
    margin: 0;
    padding-bottom: 14px;
    border-bottom: 2px solid var(--accent);
}
.sub-hero .hero-title .accent-text { color: #fff; }
.sub-hero .hero-subtitle {
    color: rgba(255, 255, 255, 0.78);
    max-width: 640px;
    margin: 18px 0 32px;
    font-size: 17px;
}

/* physics 页并入同一公式纹理风格(去掉原整幅黑板背景) */
.sub-hero.physics-blackboard-hero {
    background: linear-gradient(135deg, #010544 0%, #0a0f52 52%, #1e3374 100%);
    background-attachment: initial;
}

/* ============================================
   门户页 - 分支头部
   ============================================ */
.branch-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}
.branch-header-left .section-tag { margin-bottom: 12px; }
.branch-header-left .section-title { text-align: left; margin-bottom: 10px; }
.branch-header-left .section-desc { text-align: left; }
.branch-count {
    padding: 8px 18px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    white-space: nowrap;
    flex-shrink: 0;
    margin-top: 36px;
}
/* eyebrow 化后,分类修饰不再加彩色底(点睛短线统一洋红紫) */
.tag-applied { background: none; }
.tag-pure { background: none; color: var(--text-muted); }

/* ============================================
   门户页 - 分支卡片 (应用数学)
   ============================================ */
.branch-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}
.branch-card {
    display: flex;
    flex-direction: column;
    padding: 32px 28px;
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--text);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}
.branch-card::before {
    content: '';
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.35s;
    z-index: 0;
    border-radius: var(--radius-lg);
}
.branch-card > * { position: relative; z-index: 1; }
.branch-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.branch-card:hover::before { opacity: 1; }

.branch-icon {
    width: 60px; height: 60px;
    border-radius: 18px;
    display: grid;
    place-items: center;
    font-size: 30px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}
.branch-icon--physics { background: var(--gradient-primary); }
.branch-icon--ai { background: var(--gradient-accent); }
.branch-icon--finance { background: linear-gradient(135deg, #1a2563, #3a2a6e); }
.branch-icon--stats { background: linear-gradient(135deg, #2a2f6e, #4a3a7e); }
.branch-icon--datasci { background: linear-gradient(135deg, #4a2a5e, #6e3a7e); }

.branch-card--applied:hover { border-color: var(--primary-light); }
.branch-card--applied::before { background: linear-gradient(135deg, var(--primary-50), var(--primary-100)); }

.branch-name {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--primary);
    margin-bottom: 6px;
}
.branch-en {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 12px;
    letter-spacing: 0.3px;
}
/* 学科卡统一:扁平白卡 + 去图标/去英文(方案 A) */
.pure-card,
.branch-card {
    background: #fff;
    border: 0.5px solid var(--border);
    box-shadow: var(--shadow-sm);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}
.pure-card:hover,
.branch-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-strong);
}
.pure-card .sub-icon-large,
.branch-card .branch-icon,
.pure-card .branch-en,
.branch-card .branch-en { display: none; }
/* 学科卡左对齐 */
.pure-card { align-items: flex-start; text-align: left; }
.pure-card .branch-name,
.pure-card .branch-desc { text-align: left; }
/* “进入详情” = 蓝色链接 */
.branch-enter { color: var(--blue); font-weight: 500; }
.pure-card:hover .branch-enter,
.branch-card:hover .branch-enter { color: var(--blue); transform: translateX(3px); }
.branch-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}
.branch-topics {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}
.branch-topics span {
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    background: var(--bg-alt);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}
/* ============================================
   门户页 - 纯数学卡片
   ============================================ */
.pure-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 28px 24px;
    border-radius: var(--radius);
    text-align: center;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s;
    position: relative;
}
.pure-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.pure-card .branch-enter {
    margin-top: 14px;
    display: inline-block;
}
.pure-card:hover .branch-enter { transform: translateX(4px); color: var(--accent); }
.sub-icon-large {
    width: 56px; height: 56px;
    border-radius: 16px;
    display: grid;
    place-items: center;
    font-size: 28px;
    margin: 0 auto 16px;
    background: var(--accent-50);
}
.pure-card .branch-name { margin-bottom: 6px; }
.pure-card .branch-en { margin-bottom: 10px; }
.pure-card .branch-desc { text-align: left; margin-bottom: 12px; }

/* 应用数学 / 纯数学门户统一为可增减数量的小卡片网格 */
/* 门户分支卡：大而简。应用数学 3 张/行（5 支 → 3+2），纯数学 2 张/行；
   手机端 560px 媒体查询另有固定两列小卡，不受此处影响。 */
.branch-grid--applied {
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
    counter-reset: branch-card;
}

.branch-grid--pure {
    grid-template-columns: repeat(auto-fill, minmax(430px, 1fr));
    gap: 24px;
}

.branch-grid--applied .branch-card,
.branch-grid--pure .pure-card {
    min-height: 240px;
    height: auto;
    padding: 30px 28px;
    border-radius: 24px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: space-between;
    text-align: left;
    background: #fff;
    border: 0.5px solid var(--border);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.branch-grid--applied .branch-card {
    counter-increment: branch-card;
}

.branch-grid--applied .branch-card::after {
    content: counter(branch-card, decimal-leading-zero);
    position: absolute;
    top: 14px;
    right: 18px;
    font-size: 40px;
    font-weight: 900;
    line-height: 1;
    color: rgba(1, 5, 68, .045);
    pointer-events: none;
    z-index: 0;
}

.branch-grid--applied .branch-card:hover,
.branch-grid--pure .pure-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-strong);
}

.branch-grid--applied .branch-icon,
.branch-grid--pure .sub-icon-large {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    font-size: 27px;
    margin: 0;
    box-shadow: 0 12px 24px rgba(13, 19, 74, .12);
}

.branch-grid--applied .branch-name,
.branch-grid--pure .branch-name {
    max-width: calc(100% - 34px);
    font-size: 24px;
    line-height: 1.16;
    margin: 14px 0 0;
    color: var(--primary);
    text-wrap: balance;
}

/* 卡片保持简洁：只留中文名 + 英文小字 + 两行简介；主题标签在桌面端也不显示 */
.branch-grid--applied .branch-en,
.branch-grid--pure .branch-en {
    display: block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin: 4px 0 0;
}

.branch-grid--applied .branch-topics {
    display: none;
}

.branch-grid--applied .branch-desc,
.branch-grid--pure .branch-desc {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 10px 0 14px;
}

.branch-grid--applied .branch-enter,
.branch-grid--pure .branch-enter {
    display: inline-flex;
    align-items: center;
    margin-top: auto;
    font-size: 13px;
    font-weight: 500;
    color: var(--blue);
    transition: transform .22s ease, color .22s ease;
}

.branch-grid--applied .branch-card:hover .branch-enter,
.branch-grid--pure .pure-card:hover .branch-enter {
    color: var(--blue);
    transform: translateX(3px);
}

/* ============================================
   详情页 - 主布局 (detail-layout)
   ============================================ */
.detail-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 40px;
    align-items: start;
}
.detail-main {
    min-width: 0;
}
.detail-heading {
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border);
    margin-top: 36px;
}
.detail-heading:first-child { margin-top: 0; }
.detail-text {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

/* ============================================
   详情页 - 话题卡片 (topic-cards)
   ============================================ */
.topic-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}
.topic-card {
    padding: 24px;
    border-radius: var(--radius);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}
.topic-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.topic-num {
    position: absolute;
    top: 10px;
    right: 14px;
    font-size: 36px;
    font-weight: 900;
    color: rgba(1, 5, 68, 0.06);
    line-height: 1;
}
.topic-card h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}
.topic-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   详情页 - 公式画廊 (formula-gallery)
   ============================================ */
.formula-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 18px;
}
.formula-block {
    padding: 28px 24px;
    border-radius: var(--radius);
    text-align: center;
    transition: all 0.3s;
}
.formula-block:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.formula-display {
    font-family: 'KaTeX', 'Times New Roman', serif;
    font-style: italic;
    font-size: 22px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
    word-break: break-word;
}
.formula-label {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}

/* ============================================
   详情页 - 侧边栏 (detail-sidebar)
   ============================================ */
.detail-sidebar {
    position: sticky;
    top: 100px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.sidebar-card {
    padding: 24px;
    border-radius: var(--radius);
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.3s;
}
.sidebar-card:hover { box-shadow: var(--shadow-card); }
.sidebar-card h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
}
.sidebar-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.sidebar-link {
    display: block;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.2s;
}
.sidebar-link:hover {
    background: var(--primary-100);
    color: var(--primary);
}
.sidebar-stats {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.sidebar-stat {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    background: var(--bg-alt);
    font-size: 13px;
    color: var(--text-secondary);
}
.sidebar-stat span {
    font-size: 20px;
    font-weight: 600;
    color: var(--accent-dark);
}
.reading-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.reading-list li {
    font-size: 13px;
    color: var(--text-secondary);
    padding-left: 16px;
    position: relative;
    line-height: 1.5;
}
.reading-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 7px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--blue);
}
.sidebar-empty {
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.6;
}

/* ============================================
   响应式补充 - 新组件
/* ============================================
   新增样式：板块筛选 / 板块卡片 / 部门3列 / 板块内容页
   ============================================ */

/* —— 标题副提示 —— */
.detail-heading-hint {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    margin-left: 8px;
    vertical-align: middle;
}

/* —— 板块标签筛选条 —— */
.module-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}
.module-tag-btn {
    padding: 7px 16px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}
.module-tag-btn:hover {
    border-color: var(--blue);
    color: var(--blue);
}
.module-tag-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* —— 板块卡片网格 —— */
.module-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 18px;
    margin-bottom: 40px;
}
.module-card {
    display: flex;
    flex-direction: column;
    border-radius: 12px;
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
    color: inherit;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.module-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.module-card-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex: 1;
}
.module-card-head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}
.module-card-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: rgba(0, 113, 184, 0.08);
    color: var(--blue);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 17px;
    flex-shrink: 0;
}
.module-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.module-card-tag {
    font-size: 11px;
    font-weight: 600;
    color: var(--blue);
    background: rgba(0, 113, 184, 0.08);
    padding: 3px 9px;
    border-radius: 6px;
}
.module-card-title {
    font-family: var(--font-heading);
    font-size: 17px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 8px;
}
.module-card-excerpt {
    font-size: 13px;
    line-height: 1.55;
    color: var(--text-secondary);
    margin-bottom: 14px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.module-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-muted);
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 10px;
}
.module-card-author {
    display: flex;
    align-items: center;
    gap: 6px;
}
.module-card-avatar {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
}
.module-card-enter {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    font-weight: 600;
    color: var(--blue);
}
.module-card-enter i { font-size: 12px; transition: transform 0.2s ease; }
.module-card:hover .module-card-enter i { transform: translateX(3px); }

/* —— 板块空状态 —— */
.module-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 48px 24px;
    color: var(--text-muted);
}
.module-empty-icon { font-size: 40px; margin-bottom: 12px; opacity: 0.7; }

/* —— 板块内容页：作者/标签信息条(hero 下方浅色条) —— */
.module-meta-strip {
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
}
.module-meta-row {
    max-width: var(--reading-width);
    margin-left: auto;
    margin-right: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    padding: 14px 0;
}
.module-meta-author {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 13px;
    color: var(--text-secondary);
}
.module-meta-author i { font-size: 16px; color: var(--text-muted); }
.module-meta-name { font-weight: 600; color: var(--primary); }
.module-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.module-tag {
    font-size: 11px;
    font-weight: 600;
    color: var(--blue);
    background: rgba(0, 113, 184, 0.08);
    padding: 3px 10px;
    border-radius: 6px;
}

/* —— 板块内容页：资源卡片列表 —— */
.module-resource-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 40px;
}
.resource-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    border-radius: 12px;
}
.resource-icon {
    font-size: 26px;
    flex-shrink: 0;
}
.resource-main { flex: 1; min-width: 0; }
.resource-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 2px;
}
.resource-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 4px;
    line-height: 1.5;
}
.resource-meta {
    font-size: 11px;
    color: var(--text-muted);
}
.resource-download {
    padding: 8px 18px;
    border-radius: 8px;
    background: var(--primary);
    color: #fff;
    border: none;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.2s ease;
}
.resource-download:hover { background: var(--accent); }

/* —— 板块内容页：学习路径 —— */
.study-path {
    margin: 0 0 40px;
    padding-left: 22px;
    line-height: 2;
    color: var(--text-secondary);
}
.study-path strong { color: var(--primary); }

/* —— 投稿说明卡片 —— */
.submission-card {
    display: flex;
    align-items: center;
    gap: 18px;
    margin-top: 32px;
    padding: 22px 26px;
    border-radius: 12px;
    background: #fff;
    border: 0.5px solid var(--border);
    box-shadow: var(--shadow-sm);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}
.submission-icon {
    width: 46px;
    height: 46px;
    border-radius: 10px;
    background: var(--accent-50);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}
.submission-body { flex: 1; min-width: 0; }
.submission-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 5px;
}
.submission-desc {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
}
.submission-card .btn { flex-shrink: 0; }

/* ============================================
   首页公告栏 · 时间线 + 校园线描(重构 · 新增,未启用前不影响旧结构)
   ============================================ */
/* 公告栏：开放式排版（无外框卡），与「资料与导航」板块同一语言；
   插画区无框、左右渐隐融入页面背景 */
.notice-home {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.15fr);
    width: 100%;
    margin: 0;
}
.notice-home-main { padding: 26px 30px 24px; min-width: 0; }
.notice-home-aside {
    position: relative;
    display: flex;
    align-items: flex-end;
    min-width: 0;
    overflow: hidden;
}
/* 左右白色渐隐,让线描融入、不抢内容 */
.notice-home-aside::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(90deg, #fff, rgba(255, 255, 255, 0) 18%),
        linear-gradient(270deg, #fff, rgba(255, 255, 255, 0) 10%);
    z-index: 1;
    pointer-events: none;
}
.notice-home-illo {
    /* 插画按自身比例撑开列高，不依赖左侧公告数量，避免少量公告时被裁切。 */
    position: relative;
    width: 100%;
    aspect-ratio: 1774 / 887;
    background: #5267a8;
    mix-blend-mode: multiply;
}
.campus-illo {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center bottom;
    opacity: 1;
    mix-blend-mode: screen;
    filter: none;
}

/* 时间线 */
.notice-tl { position: relative; padding-left: 30px; }
.notice-tl::before {
    content: "";
    position: absolute;
    left: 6px; top: 12px; bottom: 12px;
    width: 2px;
    background: #dbe2f0;
}
.notice-tl-node {
    position: relative;
    display: block;
    padding: 15px 0;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}
.notice-tl-dot {
    position: absolute;
    left: -30px; top: 18px;
    width: 13px; height: 13px;
    border-radius: 50%;
    border: 2.5px solid #fff;
    background: var(--blue);
}
.notice-tl-dot--lecture,
.notice-tl-dot--activity { background: var(--blue); }
.notice-tl-dot--competition { background: var(--cyan); }
.notice-tl-dot--meeting { background: var(--purple); }
.notice-tl-dot--notice { background: var(--primary); }
.notice-tl-node--feat .notice-tl-dot { box-shadow: 0 0 0 5px rgba(0, 113, 184, 0.16); }
.notice-tl-meta { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.notice-tl-date {
    font-family: var(--font-heading);
    font-size: 13px;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}
.notice-tl-pin { font-size: 10px; font-weight: 600; color: var(--accent); letter-spacing: 0.06em; }
.notice-tl-title { font-size: 14px; color: var(--primary); font-weight: 500; line-height: 1.45; margin-top: 5px; }
.notice-tl-node:hover .notice-tl-title { color: var(--blue); }
.notice-tl-exc { font-size: 12px; color: var(--text-muted); margin-top: 4px; line-height: 1.55; }
/* 非特写行:标题跟类型同排 */
.notice-tl-node--row .notice-tl-title { display: inline; margin: 0; }

/* 类型标签(通用,列表页/详情页也可用) */
.notice-type { font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 5px; white-space: nowrap; }
.notice-type--lecture,
.notice-type--activity { background: rgba(0, 113, 184, 0.12); color: #0a5e97; }
.notice-type--competition { background: rgba(0, 159, 197, 0.14); color: #0a6478; }
.notice-type--meeting { background: rgba(120, 56, 145, 0.12); color: #5f2c73; }
.notice-type--notice { background: var(--primary-100); color: var(--primary); }

.notice-home-all {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: 16px;
    color: var(--primary);
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
}
.notice-home-all-arrow {
    display: inline-flex; align-items: center; justify-content: center;
    width: 26px; height: 26px; border-radius: 999px;
    background: rgba(0, 113, 184, .1);
    transition: transform .3s cubic-bezier(.32,.72,0,1), background .3s;
}
.notice-home-all-arrow i { font-size: 14px; color: var(--blue); transition: color .3s; }
.notice-home-all:hover .notice-home-all-arrow { transform: translateX(4px); background: var(--blue); }
.notice-home-all:hover .notice-home-all-arrow i { color: #fff; }

@media (max-width: 860px) {
    .notice-home {
        grid-template-columns: 1fr;
        width: 100%;
    }
    .notice-home-aside { display: none; }
    .notice-home-main { padding: 22px 20px 20px; }
}

/* ============================================
   讲座回放卡片 + B站外链索引
   ============================================ */
.replay-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 24px;
    margin-bottom: 8px;
}
.replay-toolbar .section-header { margin-bottom: 0; flex: 1; min-width: 0; }
.replay-search-wrap {
    position: relative;
    flex: 0 0 240px;
}
.replay-search-wrap i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 13px;
    color: var(--text-muted);
    pointer-events: none;
}
.replay-search-wrap .admin-input {
    width: 100%;
    padding: 9px 12px 9px 34px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-alt);
    font-size: 13px;
}
.replay-search-wrap .admin-input:focus { border-color: var(--blue); background: #fff; }
.replay-result-meta {
    margin: 0 0 20px;
    font-size: 13px;
    color: var(--text-muted);
}
/* 未认证用户的回放锁定提示卡 */
.replay-locked-card {
    text-align: center;
    padding: 56px 28px;
    border-radius: 16px;
    border: 1px dashed var(--border-strong);
    margin-bottom: 24px;
}
.replay-locked-icon {
    font-size: 56px;
    margin-bottom: 12px;
    color: var(--text-muted);
    opacity: .7;
}
.replay-locked-card h3 {
    font-size: 20px;
    color: var(--primary);
    margin-bottom: 8px;
}
.replay-locked-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}
.replay-tl-group { margin-bottom: 32px; }
.replay-tl-group-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 12px;
}
.replay-tl-list {
    border-left: 3px solid var(--border);
    padding-left: 24px;
}
.replay-tl-item {
    display: block;
    position: relative;
    padding-bottom: 24px;
    text-decoration: none;
    color: inherit;
}
.replay-tl-list .replay-tl-item:last-child { padding-bottom: 4px; }
.replay-tl-dot {
    position: absolute;
    left: -29px;
    top: 4px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #fff;
    border: 2.5px solid var(--border-strong);
}
.replay-tl-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 16px;
}
.replay-tl-title {
    font-family: var(--font-heading);
    font-size: 16.5px;
    font-weight: 600;
    color: var(--primary);
    margin: 0;
    transition: color 0.2s ease;
}
.replay-tl-item:hover .replay-tl-title { color: var(--blue); }
.replay-tl-watch {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 11.5px;
    font-weight: 600;
    color: var(--blue);
    white-space: nowrap;
}
.replay-tl-watch i { font-size: 12px; transition: transform 0.2s ease; }
.replay-tl-item:hover .replay-tl-watch i { transform: translateX(3px); }
.replay-tl-watch--disabled { color: var(--text-muted); }
.replay-tl-desc {
    font-size: 12.5px;
    line-height: 1.55;
    color: var(--text-secondary);
    margin: 4px 0 6px;
    max-width: 78ch;
}
.replay-tl-meta {
    font-size: 11.5px;
    color: var(--text-muted);
}
.replay-tl-topic {
    color: var(--blue);
    font-weight: 600;
}
.admin-inline-link {
    color: var(--accent);
    font-weight: 700;
    text-decoration: none;
}
.admin-inline-link:hover {
    text-decoration: underline;
}

/* ============================================
   学业导航
   ============================================ */
.academic-hero .hero-title {
    margin-bottom: 18px;
}
.academic-hero {
    min-height: 360px;
    padding: 112px 24px 56px;
}
/* hero 内容盒保持基础 1152px，与下方全宽容器左缘对齐（形态 A）；860px 窄盒覆写已移除 */
.academic-section {
    background:
        linear-gradient(180deg, rgba(246, 248, 255, 0.75), #fff 38%),
        var(--surface);
}
/* 类型标签 = 极简 eyebrow（从简，不做彩色胶囊） */
.academic-type-pill {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-muted);
}
/* meta = 点号分隔的一行灰字 */
.academic-detail-meta {
    margin-top: 10px;
    font-size: 12.5px;
    color: var(--text-muted);
    line-height: 1.6;
}
.academic-detail-meta span:first-child {
    color: var(--text-secondary);
    font-weight: 500;
}
.academic-detail-meta span:not(:last-child)::after {
    content: '·';
    margin: 0 8px;
    color: var(--border-strong);
}
.academic-detail-panel {
    position: sticky;
    top: 92px;
    min-height: 520px;
    padding: 26px;
}
.academic-detail-back {
    border: 0;
    background: transparent;
    color: var(--accent);
    font-weight: 800;
    cursor: pointer;
    padding: 0;
    margin-bottom: 14px;
}
.academic-detail-back:hover {
    text-decoration: underline;
    text-underline-offset: 4px;
}
.academic-detail-empty {
    height: 100%;
    min-height: 360px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
    color: var(--text-secondary);
}
.academic-detail-empty h3 {
    color: var(--primary);
    margin-bottom: 8px;
}
.academic-detail-code {
    display: inline-flex;
    margin: 16px 0 0;
    padding: 5px 11px;
    border-radius: 8px;
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
}
.academic-detail-course-name {
    display: block;
    margin-top: 16px;
    color: var(--primary);
    font-weight: 600;
}
/* 前置建议 = 行内前缀 + 上方发丝分隔线（从简，去色块） */
.academic-prereq {
    margin: 24px 0;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-secondary);
}
.academic-prereq strong {
    color: var(--primary);
    font-weight: 600;
}
.academic-rich-content {
    color: var(--text);
    font-size: 14.5px;
    line-height: 1.8;
}
.academic-rich-content h2 {
    font-family: var(--font-heading);
    font-size: 19px;
    font-weight: 600;
    color: var(--primary);
    margin: 24px 0 8px;
}
.academic-rich-content h3 {
    font-family: var(--font-heading);
    font-size: 15px;
    font-weight: 600;
    color: var(--navy);
    margin: 18px 0 6px;
}
.academic-rich-content p {
    margin-bottom: 14px;
}
.academic-rich-content ol {
    margin: 8px 0 14px;
    padding-left: 22px;
}
.academic-rich-content ul {
    margin: 8px 0 14px;
    padding-left: 0;
    list-style: none;
}
.academic-rich-content ul li {
    position: relative;
    padding: 5px 0 5px 16px;
}
.academic-rich-content ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 13px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--text-muted);
}
/* 底部标签 = 小号淡底方角（补回被删的 .academic-card-tags） */
.academic-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.academic-card-tags span {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-alt);
    border: 0.5px solid var(--border);
    border-radius: 6px;
    padding: 3px 10px;
}
.academic-detail-tags {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}
.academic-detail-hero .hero-title {
    max-width: 980px;
    margin-left: auto;
    margin-right: auto;
}
.academic-detail-section {
    background: var(--bg-alt);
}
/* 扁平白卡（去 glass） */
.academic-detail-page {
    max-width: none;
    margin: 0 auto;
    background: #fff;
    border: 0.5px solid var(--border);
    border-radius: 12px;
    box-shadow: var(--shadow-card);
    padding: 40px 48px;
}
/* 两栏：左正文 + 右插画/下一步（放开限宽，插画列加宽） */
.academic-detail-layout {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 52px;
    align-items: start;
}
.academic-detail-main {
    min-width: 0;
}
.academic-detail-aside {
    border-left: 0.5px solid var(--border);
    padding-left: 28px;
    position: sticky;
    top: 96px;
}
.academic-aside-illo {
    width: 100%;
    height: auto;
    display: block;
    opacity: 0.82;
}
.academic-aside-h {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin: 22px 0 6px;
}
.academic-aside-nav a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    font-size: 13px;
    color: var(--navy);
    text-decoration: none;
    padding: 10px 0;
    border-bottom: 0.5px solid var(--border);
    transition: color 0.2s ease;
}
.academic-aside-nav a i {
    color: var(--blue);
    transition: transform 0.2s ease;
}
.academic-aside-nav a:hover {
    color: var(--blue);
}
.academic-aside-nav a:hover i {
    transform: translateX(3px);
}
.academic-detail-block {
    margin-top: 22px;
}
.academic-detail-block h2 {
    font-family: var(--font-heading);
    font-size: 19px;
    font-weight: 600;
    color: var(--primary);
    line-height: 1.3;
    margin-bottom: 10px;
}
.academic-resource-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.academic-resource-list li {
    position: relative;
    padding: 6px 0 6px 16px;
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 14px;
}
.academic-resource-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 13px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--text-muted);
}
.academic-admin-tools {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin-bottom: 22px;
    padding: 14px 16px;
    border-radius: 10px;
    background: rgba(206, 87, 193, 0.08);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 700;
}
/* ============================================
   学业导航页(academic-guide.html)— 专业四格 + 双 tab
   ============================================ */
.ag-majors {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 14px;
    margin-bottom: 40px;
}
.ag-major-card {
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 18px 20px;
    text-decoration: none;
    color: inherit;
    background: #fff;
    transition: box-shadow 0.25s ease, border-color 0.25s ease;
}
.ag-major-card:hover { border-color: var(--border-strong); box-shadow: var(--shadow-sm); }
.ag-major-card h3 {
    font-family: var(--font-heading);
    font-size: 17px; font-weight: 600; color: var(--primary); margin: 0 0 6px;
}
.ag-major-card p {
    font-size: 12.5px; color: var(--text-secondary); line-height: 1.6;
    margin: 0 0 10px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.ag-major-more { font-size: 12px; color: var(--blue); }
.ag-major-more i { font-size: 12px; }

.ag-tabs { display: flex; gap: 26px; border-bottom: 1px solid var(--border); margin-bottom: 18px; }
.ag-tab {
    font-family: var(--font-heading);
    font-size: 16px; font-weight: 600; color: var(--text-secondary);
    background: none; border: none; padding: 0 2px 10px; cursor: pointer;
    border-bottom: 2px solid transparent; margin-bottom: -1px;
    transition: color 0.2s ease, border-color 0.2s ease;
}
.ag-tab:hover { color: var(--primary); }
.ag-tab.active { color: var(--primary); border-bottom-color: var(--accent); }

.ag-tools { display: flex; flex-wrap: wrap; gap: 10px 14px; align-items: center; margin-bottom: 20px; }
.ag-search-wrap { position: relative; flex: 0 0 250px; }
.ag-search-wrap i {
    position: absolute; left: 12px; top: 50%; transform: translateY(-50%);
    font-size: 14px; color: var(--text-muted); pointer-events: none;
}
.ag-search-wrap input {
    width: 100%; padding: 8px 12px 8px 34px; font-size: 13px;
    border: 1px solid var(--border); border-radius: 8px;
    background: var(--surface); color: var(--text); outline: none;
    transition: border-color 0.2s;
}
.ag-search-wrap input:focus { border-color: var(--blue); }
.ag-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.ag-chip {
    font-size: 12px; padding: 4px 12px; border-radius: 999px;
    border: 1px solid var(--border); background: none; color: var(--text-secondary);
    cursor: pointer; transition: all 0.2s ease;
}
.ag-chip:hover { border-color: var(--border-strong); color: var(--primary); }
.ag-chip.active { background: var(--primary); border-color: var(--primary); color: #fff; }

.ag-course-group { margin-bottom: 26px; }
.ag-group-label { font-size: 12px; font-weight: 600; color: var(--text-muted); margin-bottom: 4px; }
.ag-course-row {
    display: flex; align-items: baseline; gap: 14px;
    padding: 9px 4px; border-bottom: 1px solid var(--bg-alt);
    text-decoration: none; color: inherit;
    transition: background 0.2s ease;
}
.ag-course-row:hover { background: rgba(1,5,68,0.02); }
.ag-course-code {
    font-family: 'SFMono-Regular', Consolas, monospace;
    font-size: 12.5px; color: var(--blue); flex: 0 0 76px;
}
.ag-course-name {
    font-family: var(--font-heading);
    font-size: 15px; font-weight: 600; color: var(--primary);
    flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.ag-course-meta { font-size: 11.5px; color: var(--text-muted); white-space: nowrap; font-variant-numeric: tabular-nums; }
.ag-course-arrow { font-size: 13px; color: var(--text-muted); transition: transform 0.25s, color 0.25s; }
.ag-course-row:hover .ag-course-arrow { color: var(--blue); transform: translateX(4px); }
.ag-expand {
    display: inline-flex; align-items: center; gap: 5px;
    font-size: 12.5px; color: var(--blue);
    background: none; border: none; padding: 10px 4px; cursor: pointer;
}
.ag-expand--center { display: flex; margin: 6px auto 0; }

.ag-exp-line { border-left: 2px solid var(--border); padding-left: 26px; }
.ag-exp-item { display: block; position: relative; padding-bottom: 26px; text-decoration: none; color: inherit; }
.ag-exp-line .ag-exp-item:last-child { padding-bottom: 4px; }
.ag-exp-dot {
    position: absolute; left: -33px; top: 4px;
    width: 11px; height: 11px; border-radius: 50%;
    background: #fff; border: 2.5px solid var(--purple);
}
.ag-exp-meta { font-size: 11.5px; color: var(--text-muted); margin-bottom: 4px; }
.ag-exp-title {
    font-family: var(--font-heading);
    font-size: 16.5px; font-weight: 600; color: var(--primary);
    margin: 0 0 4px; transition: color 0.2s;
}
.ag-exp-item:hover .ag-exp-title { color: var(--blue); }
.ag-exp-summary { font-size: 12.5px; color: var(--text-secondary); line-height: 1.65; margin: 0 0 8px; max-width: 78ch; }
.ag-exp-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.ag-tag { font-size: 10.5px; padding: 2px 8px; border-radius: 5px; background: var(--bg-alt); color: var(--text-secondary); }
.ag-empty { padding: 44px 0; text-align: center; color: var(--text-muted); font-size: 14px; }
.ag-empty span { display: block; font-size: 12px; margin-top: 6px; }

@media (max-width: 560px) {
    .ag-majors { grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 28px; }
    .ag-major-card { padding: 14px; }
    .ag-search-wrap { flex: 1 1 100%; }
    .ag-course-meta { display: none; }
    .ag-exp-line { padding-left: 20px; }
    .ag-exp-dot { left: -27px; width: 9px; height: 9px; }
}

/* 响应式 */
/* —— 首页「资料与回放」入口：大字 hover 展开式列表(2026-07-11 改版，替代原竖向卡片网格) —— */
/* 资料与回放：左插画 + 右大字列表（2026-07-11 图文交错节奏） */
.dl-split {
    display: flex;
    align-items: center;
    gap: 48px;
}
.dl-illo {
    flex: 0 0 clamp(420px, 42%, 560px);
    margin-left: calc(clamp(56px, 6vw, 110px) * -1);
    background: #405695;
    mix-blend-mode: multiply;
    opacity: 0.86;
    -webkit-mask-image: linear-gradient(90deg, #000 0, #000 84%, transparent 100%);
    mask-image: linear-gradient(90deg, #000 0, #000 84%, transparent 100%);
}
.dl-illo img {
    width: 100%;
    height: auto;
    display: block;
    mix-blend-mode: screen;
}
.dl-rows {
    flex: 1;
    border-top: 1px solid var(--border);
    max-width: 760px;
}
@media (max-width: 860px) {
    .dl-illo {
        display: none;
        margin-left: 0;
    }
}
.dl-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 26px 4px;
    border-bottom: 1px solid var(--border);
    text-decoration: none;
    opacity: 1;
    transition: opacity 0.3s ease;
}
.dl-row-main { flex: 1; min-width: 0; }
.dl-row-title {
    display: block;
    font-family: var(--font-heading);
    font-size: clamp(20px, 2vw, 24px);
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 6px;
}
.dl-row-desc {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}
.dl-row-hint {
    font-size: 12px;
    color: var(--text-muted);
    white-space: nowrap;
    flex-shrink: 0;
}
.dl-row-arrow {
    font-size: 20px;
    color: var(--text-muted);
    flex-shrink: 0;
    transition: transform 0.3s ease, color 0.3s ease;
}
.dl-rows:hover .dl-row { opacity: 0.4; }
.dl-rows .dl-row:hover { opacity: 1; }
.dl-row:hover .dl-row-arrow { color: var(--blue); transform: translateX(5px); }

/* 首页「学业导航」板块已并入「资料与导航」大字列表（2026-07-11 三合一），.aca-index 系列已退役 */
/* ============================================
   积分系统样式（个人中心 + 商城）
   ============================================ */

/* —— 未登录遮罩 —— */
.login-gate {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    padding: 60px 20px;
}
.login-gate-card {
    text-align: center;
    padding: 48px 40px;
    border-radius: 20px;
    max-width: 420px;
}
.login-gate-card {
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}
.login-gate-icon { font-size: 40px; margin-bottom: 14px; color: var(--text-muted); }
.login-gate-card h2 { font-size: 24px; color: var(--primary); margin-bottom: 12px; }
.login-gate-card p { color: var(--text-secondary); margin-bottom: 24px; line-height: 1.6; }

/* —— 个人中心 · 左竖导航 + 右内容区 7 板块账号中心(2026-07-13 重构 v2) —— */
.pf-layout { display: grid; grid-template-columns: 180px minmax(0, 720px) 1fr; gap: 40px; align-items: start; }
.pf-illo { position: sticky; top: 90px; width: 100%; max-width: 240px; justify-self: end; opacity: .8; pointer-events: none; user-select: none; }
.pf-side { position: sticky; top: 90px; display: flex; flex-direction: column; gap: 2px; }
.pf-side-label { font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--text-muted); margin: 0 0 10px 10px; }
.pf-nav-item { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 8px; font-size: 14px; color: var(--text-secondary); cursor: pointer; text-decoration: none; transition: background .18s ease, color .18s ease; }
.pf-nav-item .ti { font-size: 18px; }
.pf-nav-item:hover { background: var(--bg-alt); color: var(--primary); }
.pf-nav-item.active { background: var(--primary); color: #fff; }
.pf-nav-item.active .ti { color: #fff; }
.pf-sec { display: none; animation: fadeIn .3s ease; }
.pf-sec.active { display: block; }
.pf-sec-title { font-family: var(--font-heading); font-size: 22px; font-weight: 600; color: var(--primary); margin: 0 0 16px; }
.pf-block-label { font-size: 13px; color: var(--text-secondary); margin: 0 0 8px; }

/* —— 身份行(个人资料顶部) —— */
.pf-hello { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; }
.pf-hello-name { font-family: var(--font-heading); font-size: 22px; font-weight: 600; color: var(--primary); }
.pf-badge-ok { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; color: #0a6478; background: rgba(0,159,197,.12); padding: 3px 10px; border-radius: 999px; }
.pf-badge-muted { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; color: var(--text-muted); background: var(--bg-alt); padding: 3px 10px; border-radius: 999px; }
/* —— 参与点横幅(我的参与度顶部,复用 hero 公式纹理) —— */
.pf-hero { position: relative; overflow: hidden; display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; flex-wrap: wrap; background: var(--primary); border-radius: 14px; padding: 24px 28px; margin-bottom: 22px; }
.pf-hero::before { content: ''; position: absolute; inset: 0; background: url('../images/hero-math-blackboard-v1.webp') center / cover no-repeat; opacity: .10; filter: brightness(1.7); pointer-events: none; }
.pf-hero > * { position: relative; z-index: 1; }
.pf-hero-label { font-size: 12.5px; color: rgba(255,255,255,.7); margin-bottom: 8px; }
.pf-hero-num { font-family: var(--font-heading); font-size: 40px; font-weight: 600; color: var(--gold); line-height: 1; font-variant-numeric: tabular-nums; }
.pf-hero-sub { font-size: 12px; color: rgba(255,255,255,.65); margin-top: 10px; }
.pf-hero-side { display: flex; gap: 26px; text-align: right; }
.pf-hero-stat b { display: block; font-family: var(--font-heading); font-size: 22px; font-weight: 600; color: #fff; line-height: 1; font-variant-numeric: tabular-nums; }
.pf-hero-stat span { font-size: 11.5px; color: rgba(255,255,255,.6); }

/* —— 个人资料 profile —— */
.pf-fields { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; margin-bottom: 8px; }
.pf-field { display: flex; align-items: center; gap: 12px; padding: 14px 16px; border-bottom: 1px solid var(--border); }
.pf-field:last-child { border-bottom: none; }
.pf-field > .ti { font-size: 18px; color: var(--text-secondary); }
.pf-field-body { flex: 1; }
.pf-field-k { font-size: 12px; color: var(--text-secondary); }
.pf-field-v { font-size: 15px; color: var(--text); margin-top: 2px; }
.pf-inline-ok { font-size: 11px; color: #0f6e56; background: rgba(0,159,197,.12); padding: 2px 8px; border-radius: 6px; margin-left: 4px; }
.pf-field-soon { font-size: 12px; color: var(--text-muted); background: var(--bg-alt); padding: 4px 10px; border-radius: 6px; }
.pf-hint { font-size: 12px; color: var(--text-muted); line-height: 1.7; margin: 8px 0 22px; }
.pf-two { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.pf-plain { list-style: none; padding: 0; margin: 0; font-size: 13px; line-height: 2; color: var(--text); }
.pf-plain--muted { color: var(--text-secondary); }
.pf-plain .ti { color: var(--text-secondary); }

/* —— 社员认证 verify —— */
.pf-verify-ok { border: 1px solid var(--border); border-radius: 12px; overflow: hidden; }
.pf-verify-ok-head { display: flex; align-items: center; gap: 12px; padding: 16px 18px; background: rgba(0,159,197,.1); }
.pf-verify-ok-head .ti { font-size: 26px; color: #0a6478; }
.pf-verify-ok-title { font-size: 15px; color: #0a6478; }
.pf-verify-ok-meta { font-size: 12px; color: #0a6478; opacity: .85; margin-top: 2px; }
.pf-verify-ok-body { padding: 14px 18px; }
.pf-perks { display: flex; flex-wrap: wrap; gap: 16px; font-size: 13px; color: var(--text); }
.pf-perks .ti { color: #0f6e56; }
.pf-verify-no { border: 1px solid var(--border); border-radius: 12px; padding: 18px; }
.pf-verify-no-head { display: flex; align-items: center; gap: 10px; font-size: 15px; color: var(--text); margin-bottom: 10px; }
.pf-verify-no-head .ti { font-size: 20px; color: var(--text-secondary); }
.pf-verify-no p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin: 0 0 14px; }
.pf-verify-no-form { display: flex; gap: 8px; align-items: center; }
.pf-verify-no-form .redeem-input { max-width: 200px; }

/* —— 我的参与度 points —— */
.pf-two-uneven { display: grid; grid-template-columns: 1.5fr 1fr; gap: 24px; align-items: start; }
.pf-ways { display: flex; flex-direction: column; gap: 14px; }
.pf-way { display: flex; gap: 10px; align-items: flex-start; }
.pf-way .ti { font-size: 18px; color: var(--blue); margin-top: 1px; }
.pf-way-t { font-size: 14px; color: var(--text); }
.pf-way-d { font-size: 12px; color: var(--text-muted); }

/* —— 纪念品兑换 shop(并入我的参与度末尾) —— */
.pf-shop-block { margin-top: 30px; padding-top: 26px; border-top: 1px solid var(--border); }
.pf-subhead { font-family: var(--font-heading); font-size: 18px; font-weight: 600; color: var(--primary); margin: 0; }
.pf-sec-head { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 16px; }
.pf-balance-inline { font-size: 13px; color: var(--text-secondary); }
.pf-balance-inline strong { color: var(--text); }
.pf-notice { border: 1px solid var(--border); background: var(--bg-alt); border-radius: 12px; padding: 14px 16px; font-size: 12.5px; color: var(--text-secondary); line-height: 1.8; margin-top: 18px; }
.pf-notice strong { color: var(--primary); }

/* —— 账号与安全 security —— */
.pf-logout { display: flex; align-items: center; gap: 12px; padding: 15px 16px; border: 1px solid var(--border); border-radius: 12px; margin-top: 16px; }
.pf-logout > .ti { font-size: 18px; color: #c0392b; }

/* 参与度:兑换码输入行 */
.pf-redeem-row { display: flex; gap: 8px; align-items: center; margin-top: 14px; }
.pf-redeem-row .redeem-input { flex: 1; max-width: 180px; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* —— 导航栏积分显示 —— */
/* 积分 = 金色成就徽章 + coin 图标(取代 🪙) */
.nav-points {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: #edb647;
    font-size: 13px;
    font-weight: 600;
    background: rgba(237, 182, 71, 0.15);
    padding: 5px 11px;
    border-radius: 999px;
    white-space: nowrap;
    cursor: pointer;
    font-variant-numeric: tabular-nums;
}
.nav-points .ti { font-size: 15px; }
.nav-points:hover { background: rgba(237, 182, 71, 0.25); }
/* 用户名 = 线性用户图标 + 名字(取代 👋) */
.nav-username { display: inline-flex; align-items: center; gap: 6px; }
.nav-username .ti { font-size: 17px; color: rgba(255, 255, 255, 0.75); }

.redeem-input {
    flex: 1;
    padding: 9px 12px;
    border: 1px solid rgba(1, 5, 68, 0.2);
    border-radius: 8px;
    font-size: 14px;
    font-family: 'KaTeX', monospace;
    text-transform: uppercase;
}
.redeem-input:focus { outline: none; border-color: var(--accent); }
.redeem-hint { font-size: 11px; color: var(--text-muted); font-family: 'KaTeX', monospace; }

.profile-panel-title { font-size: 17px; color: var(--primary); margin-bottom: 16px; }

/* 积分流水 */
.points-log { max-height: 360px; overflow-y: auto; }
.points-log-item {
    display: grid;
    grid-template-columns: 70px 1fr auto;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(1, 5, 68, 0.06);
    font-size: 13px;
}
.points-log-item:last-child { border-bottom: none; }
.points-log-amount { font-weight: 700; font-variant-numeric: tabular-nums; }
.points-log-item.income .points-log-amount { color: #1d8a52; }
.points-log-item.expense .points-log-amount { color: #d63b3b; }
.points-log-reason { color: var(--text-secondary); }
.points-log-date { color: var(--text-muted); font-size: 11px; }
.points-log-empty { text-align: center; color: var(--text-muted); padding: 30px 0; font-size: 14px; }

/* 记录 tab */
.profile-panel-tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.profile-tab {
    padding: 6px 16px;
    border-radius: 8px;
    border: 1px solid rgba(1, 5, 68, 0.15);
    background: transparent;
    color: var(--text-muted);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}
.profile-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* 订单/资料记录 */
.records-empty { text-align: center; color: var(--text-muted); padding: 30px 0; font-size: 14px; }
.records-empty a { color: var(--accent); }
.order-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(1, 5, 68, 0.06);
}
.order-item:last-child { border-bottom: none; }
.order-cover { font-size: 28px; flex-shrink: 0; }
.order-info { flex: 1; min-width: 0; }
.order-name { font-size: 14px; font-weight: 600; color: var(--primary); margin-bottom: 2px; }
.order-meta { font-size: 11px; color: var(--text-muted); }
.order-status {
    font-size: 11px;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 6px;
    flex-shrink: 0;
}
.order-status-pending { background: #fff3cd; color: #856404; }
.order-status-shipped { background: #d1ecf1; color: #0c5460; }
.order-status-done { background: #d4edda; color: #155724; }

/* 通知中心 */
.profile-notification-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 18px;
    flex-wrap: wrap;
}
.profile-notification-tabs {
    display: inline-flex;
    gap: 8px;
    padding: 6px;
    border-radius: 12px;
    background: rgba(1, 5, 68, 0.04);
}
.profile-notification-tabs button {
    border: none;
    border-radius: 9px;
    padding: 8px 14px;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 700;
    cursor: pointer;
}
.profile-notification-tabs button.active {
    background: #fff;
    color: var(--primary);
    box-shadow: 0 2px 8px rgba(1,5,68,0.08);
}
.notification-list {
    display: grid;
    gap: 12px;
}
.notification-item {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 18px;
    padding: 18px 20px;
    border: 1px solid rgba(1, 5, 68, 0.08);
    border-radius: 14px;
    background: #fff;
}
.notification-item.is-unread {
    border-color: rgba(206, 87, 193, 0.32);
    background: linear-gradient(135deg, rgba(206, 87, 193, 0.08), #fff 42%);
}
.notification-title-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
    flex-wrap: wrap;
}
.notification-unread-dot {
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: #ff4d5d;
    flex-shrink: 0;
}
.notification-type-tag {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 3px 9px;
    background: rgba(206, 87, 193, 0.12);
    color: var(--accent);
    font-size: 11px;
    font-weight: 800;
}
.notification-title {
    margin: 0;
    color: var(--primary);
    font-size: 16px;
}
.notification-content {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.65;
    white-space: pre-wrap;
    margin: 0 0 10px;
}
.notification-meta {
    color: var(--text-muted);
    font-size: 12px;
}
.notification-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    flex-wrap: wrap;
}

/* —— 商城 —— */
.shop-balance {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    border-radius: 999px;
    margin-top: 24px;
    color: #fff;
}
.shop-balance strong { font-size: 22px; font-variant-numeric: tabular-nums; }
.shop-balance-link { font-size: 12px; color: rgba(255,255,255,0.8); text-decoration: underline; }
.shop-login-hint {
    text-align: center;
    padding: 14px;
    margin-bottom: 24px;
    background: rgba(206, 87, 193, 0.06);
    border-radius: 10px;
    font-size: 14px;
    color: var(--text-secondary);
}
.shop-login-hint a { color: var(--accent); font-weight: 600; }
.shop-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}
.shop-card {
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.shop-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.shop-card-cover {
    height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 56px;
    background: linear-gradient(135deg, rgba(1,5,68,0.06), rgba(206,87,193,0.12));
}
.shop-card-cover--image {
    padding: 0;
    background: rgba(1,5,68,0.04);
}
.shop-card-cover-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.shop-card-body { padding: 18px; display: flex; flex-direction: column; flex: 1; }
.shop-card-name { font-size: 16px; font-weight: 700; color: var(--primary); margin-bottom: 6px; }
.shop-card-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.5; margin-bottom: 14px; flex: 1; }
.shop-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}
.shop-card-price { font-size: 18px; font-weight: 800; color: var(--accent); }
.shop-card-stock { font-size: 12px; color: var(--text-muted); }
.shop-card-btn { width: 100%; }
.exchange-cover {
    width: 108px;
    height: 88px;
    margin: 0 auto 12px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 42px;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(1,5,68,0.06), rgba(206,87,193,0.12));
}
.exchange-cover--image { background: rgba(1,5,68,0.04); }
.exchange-cover-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* —— 响应式 —— */
/* ============================================
   管理后台 admin 样式
   ============================================ */

/* —— 登录拦截 —— */
.admin-gate { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 40px 20px; background: var(--bg); }
.admin-gate-card { text-align: center; padding: 44px 36px; border-radius: 20px; max-width: 380px; width: 100%; }
.admin-gate-icon { font-size: 52px; margin-bottom: 14px; }
.admin-gate-card h2 { font-size: 22px; color: var(--primary); margin-bottom: 8px; }
.admin-gate-card p { color: var(--text-secondary); margin-bottom: 20px; }
.admin-gate-form { display: flex; flex-direction: column; gap: 10px; margin-bottom: 12px; }
.admin-gate-hint { font-size: 12px; color: var(--text-muted); margin-bottom: 12px; }
.admin-gate-back { font-size: 13px; color: var(--accent); }
.admin-input {
    width: 100%; padding: 10px 14px; border: 1px solid rgba(1,5,68,0.2); border-radius: 8px;
    font-size: 14px; font-family: inherit; box-sizing: border-box;
}
.admin-input:focus { outline: none; border-color: var(--accent); }
.btn-block { width: 100%; }

/* —— 后台主体布局 —— */
.admin-app { flex-direction: column; min-height: 100vh; background: var(--bg); }
.admin-topbar {
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 24px; height: 60px; background: var(--primary); color: #fff;
    position: sticky; top: 0; z-index: 100;
}
.admin-topbar .logo-title { color: #fff; font-size: 16px; }
.admin-topbar-right { display: flex; align-items: center; gap: 14px; color: #fff; font-size: 14px; }
.admin-body { display: flex; flex: 1; }

/* 侧边栏 */
.admin-sidebar {
    width: 220px; background: #fff; border-right: 1px solid var(--border);
    padding: 16px 12px; display: flex; flex-direction: column; gap: 4px; flex-shrink: 0;
}
.admin-nav {
    display: block; text-align: left; padding: 12px 16px; border: none; background: transparent;
    border-radius: 8px; font-size: 14px; font-weight: 500; color: var(--text-secondary);
    cursor: pointer; transition: all 0.2s; text-decoration: none; font-family: inherit;
}
.admin-nav:hover { background: rgba(1,5,68,0.04); color: var(--primary); }
.admin-nav.active { background: var(--primary); color: #fff; }
.admin-nav-link { margin-top: 4px; }
.admin-sidebar-divider { border: none; border-top: 1px solid var(--border); margin: 12px 0; }

/* 内容区 */
.admin-content { flex: 1; padding: 28px; overflow-x: auto; }
.admin-mod-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.admin-mod-header h2 { font-size: 20px; color: var(--primary); }
.admin-mod-header-stacked { align-items: flex-start; gap: 16px; }
.admin-mod-subtitle { margin-top: 6px; font-size: 13px; color: var(--text-muted); line-height: 1.5; }

/* Tabs */
.admin-tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.admin-tab {
    padding: 7px 18px; border-radius: 8px; border: 1px solid var(--border);
    background: #fff; color: var(--text-muted); font-size: 13px; cursor: pointer; font-family: inherit;
}
.admin-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.admin-module-toolbar {
    display: flex; align-items: flex-end; gap: 12px; flex-wrap: wrap;
    margin: -4px 0 16px;
}
.admin-inline-field {
    display: flex; flex-direction: column; gap: 5px; min-width: 160px;
}
.admin-inline-field label {
    font-size: 12px; font-weight: 700; color: var(--text-secondary);
}
.admin-month-group { margin-bottom: 20px; }
.admin-month-title {
    display: flex; align-items: baseline; gap: 8px;
    margin: 0 0 8px; color: var(--primary); font-size: 16px; font-weight: 800;
}
.admin-month-title span {
    color: var(--text-muted); font-size: 12px; font-weight: 600;
}

/* 表格 */
.admin-table-wrap { overflow-x: auto; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 14px; background: #fff; border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); }
.admin-table th { background: rgba(1,5,68,0.04); padding: 12px 14px; text-align: left; font-weight: 600; color: var(--text-secondary); font-size: 13px; white-space: nowrap; }
.admin-table td { padding: 12px 14px; border-top: 1px solid var(--border); }
.admin-table tr:hover td { background: rgba(1,5,68,0.02); }
.cell-title { max-width: 280px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.admin-row-actions { display: flex; gap: 6px; white-space: nowrap; }
.admin-btn-danger { color: #d63b3b !important; }
.admin-empty { text-align: center; padding: 40px; color: var(--text-muted); background: #fff; border-radius: 12px; }
.admin-table-meta {
    padding: 10px 2px 0;
    font-size: 12px;
    color: var(--text-muted);
}
.admin-check {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--primary);
}
.admin-users-table th:first-child,
.admin-users-table td:first-child {
    width: 36px;
}
.admin-user-account {
    display: flex;
    flex-direction: column;
    gap: 3px;
    min-width: 170px;
}
.admin-user-account span {
    font-size: 12px;
    color: var(--text-muted);
}
.admin-user-stats {
    display: grid;
    grid-template-columns: repeat(5, minmax(110px, 1fr)) minmax(260px, 2fr);
    gap: 10px;
    margin: 0 0 16px;
}
.admin-user-stat {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 14px;
    min-height: 74px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    box-shadow: var(--shadow);
}
.admin-user-stat span {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 700;
}
.admin-user-stat strong {
    font-size: 24px;
    color: var(--primary);
    line-height: 1;
}
.admin-user-stat em {
    font-style: normal;
    color: var(--text-secondary);
    font-size: 12px;
    line-height: 1.55;
}
.admin-user-toolbar {
    display: grid;
    grid-template-columns: minmax(220px, 1.7fr) repeat(5, minmax(130px, 1fr)) auto auto;
    gap: 10px;
    align-items: center;
    margin-bottom: 12px;
}
.admin-user-bulkbar {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    min-height: 44px;
    padding: 10px 12px;
    margin-bottom: 12px;
    background: rgba(1,5,68,0.04);
    border: 1px solid var(--border);
    border-radius: 10px;
}
.admin-user-bulk-left {
    font-size: 13px;
    color: var(--text-secondary);
    margin-right: auto;
}
.admin-user-bulkbar .admin-input {
    width: auto;
    min-width: 150px;
}
.admin-content-bulkbar {
    min-height: 54px;
    padding: 10px 12px;
    margin: 0 0 12px;
}
.admin-content-bulkbar--idle {
    background: transparent;
    border-style: dashed;
}
.admin-content-bulkbar--idle .admin-user-bulk-left {
    display: flex;
    align-items: baseline;
    gap: 8px;
}
.admin-content-bulkbar--idle .admin-user-bulk-left strong { color: var(--primary); }
.admin-content-bulkbar--idle .admin-user-bulk-left span { color: var(--text-muted); font-size: 12px; }
.admin-content-bulkbar--active {
    position: relative;
    z-index: 2;
    border-color: rgba(1,5,68,.18);
    background: #f5f6fb;
    box-shadow: 0 5px 14px rgba(1,5,68,.05);
    animation: admin-bulkbar-slide-in .2s cubic-bezier(.2,.7,.3,1) both;
}
@keyframes admin-bulkbar-slide-in {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
    .admin-content-bulkbar--active { animation: none; }
}
.admin-bulk-selection {
    display: flex;
    align-items: center;
    gap: 7px;
}
.admin-bulk-selection-count {
    display: inline-grid;
    place-items: center;
    min-width: 24px;
    height: 24px;
    padding: 0 6px;
    color: #fff;
    background: var(--primary);
    border-radius: 4px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}
.admin-bulk-selection button {
    margin-left: 3px;
    padding: 2px 0;
    border: 0;
    color: #777e92;
    background: transparent;
    font-size: 12px;
    text-decoration: underline;
    text-underline-offset: 3px;
}
.admin-bulk-actions { display: flex; align-items: center; gap: 8px; }
.admin-bulk-more { position: relative; }
.admin-bulk-more summary {
    display: flex;
    align-items: center;
    min-height: 32px;
    padding: 5px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text-secondary);
    background: #fff;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
}
.admin-bulk-more summary::-webkit-details-marker { display: none; }
.admin-bulk-more summary::after { content: '⌄'; margin-left: 7px; color: var(--text-muted); }
.admin-bulk-more[open] summary { color: var(--primary); border-color: rgba(1,5,68,.3); }
.admin-bulk-more-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 150px;
    padding: 6px;
    border: 1px solid var(--border);
    border-radius: 7px;
    background: #fff;
    box-shadow: 0 12px 28px rgba(1,5,68,.14);
}
.admin-bulk-more-menu button {
    width: 100%;
    padding: 8px 9px;
    border: 0;
    border-radius: 4px;
    background: transparent;
    text-align: left;
    font-size: 12px;
}
.admin-bulk-more-menu .admin-bulk-danger { color: #ad3c4a; }
.admin-bulk-more-menu .admin-bulk-danger:hover { background: #fff2f4; }
.admin-content-bulkbar .btn[disabled],
.admin-table .admin-check[disabled] {
    opacity: 0.45;
    cursor: not-allowed;
}
.admin-pagination {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 14px;
    color: var(--text-secondary);
    font-size: 13px;
}
.admin-page-size {
    width: auto;
    min-width: 110px;
}
.admin-user-detail-main {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: stretch;
    margin-bottom: 18px;
}
.admin-user-profile {
    display: flex;
    align-items: center;
    gap: 14px;
}
.admin-user-avatar {
    width: 54px;
    height: 54px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: #fff;
    font-size: 20px;
    font-weight: 800;
    flex-shrink: 0;
}
.admin-user-profile h4 {
    margin: 0 0 4px;
    color: var(--primary);
    font-size: 18px;
}
.admin-user-profile p {
    margin: 0 0 8px;
    color: var(--text-muted);
    font-size: 13px;
}
.admin-user-kpis {
    display: grid;
    grid-template-columns: repeat(3, minmax(90px, 1fr));
    gap: 10px;
    min-width: 330px;
}
.admin-user-kpis div {
    background: rgba(1,5,68,0.04);
    border-radius: 10px;
    padding: 12px;
}
.admin-user-kpis span {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 5px;
}
.admin-user-kpis strong {
    color: var(--primary);
}
.admin-user-detail-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 14px;
}
.admin-user-detail-grid section {
    min-width: 0;
}
.admin-user-detail-grid h4 {
    margin: 0 0 8px;
    color: var(--primary);
    font-size: 14px;
}
.admin-mini-table {
    box-shadow: none;
    border: 1px solid var(--border);
    font-size: 12px;
}
.admin-mini-table td {
    padding: 9px 10px;
}
.admin-notification-summary {
    display: grid;
    grid-template-columns: repeat(3, minmax(160px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}
.admin-notification-card {
    padding: 14px 16px;
    border-radius: 12px;
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}
.admin-notification-card span {
    display: block;
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 700;
    margin-bottom: 6px;
}
.admin-notification-card strong {
    color: var(--primary);
    font-size: 22px;
}
.admin-notification-send-note {
    padding: 12px 14px;
    border-radius: 10px;
    background: rgba(1,5,68,0.04);
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.6;
    margin: 0 0 14px;
}
/* 下载与水印模块：说明块改用与页面背景同族的中性底 + 细边框，
   避免冷蓝调色块与「白 + 浅灰 + 品红」基调冲突（视觉审查 2026-09-08） */
.admin-mod[data-amod="settings"] .admin-notification-send-note {
    background: var(--bg-alt);
    border: 1px solid var(--border);
}
/* 下载与水印模块：小节标题与开关文案对齐后台既有字阶
   （h3 参照 dashboard 面板 = 衬线 18px 深蓝；开关文案 = 表单 label 级 14px/600） */
.admin-mod[data-amod="settings"] .settings-section-head {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin: 20px 0 12px;
}
.admin-mod[data-amod="settings"] .settings-section-head h3 {
    margin: 0;
    color: var(--admin-navy);
    font-family: var(--font-heading);
    font-size: 18px;
}
.admin-mod[data-amod="settings"] .settings-section-note {
    font-size: 12px;
    color: var(--text-muted);
}
.admin-mod[data-amod="settings"] .settings-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    margin: 4px 0 10px;
}
.admin-mod[data-amod="settings"] .settings-toggle strong {
    font-size: 14px;
    font-weight: 600;
    color: var(--admin-navy);
}
.admin-notification-content-cell {
    max-width: 360px;
    color: var(--text-secondary);
    font-size: 12px;
    line-height: 1.5;
}
.admin-notification-read {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}
.admin-notification-read-bar {
    width: 80px;
    height: 6px;
    border-radius: 999px;
    background: rgba(1,5,68,0.08);
    overflow: hidden;
}
.admin-notification-read-bar i {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: var(--accent);
}
.admin-section-subhead {
    margin: 14px 0 10px;
}
.admin-section-subhead--spaced {
    margin-top: 24px;
}
.admin-section-subhead h3 {
    margin: 0 0 4px;
    color: var(--primary);
    font-size: 18px;
}
.admin-section-subhead p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.5;
}

/* 可见性标签 */
.vis-tag { display: inline-block; font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 4px; }
.vis-public { background: #d4edda; color: #155724; }
.vis-login { background: #fff3cd; color: #856404; }
.vis-points { background: #f8d7f5; color: #7a2c6e; }
.role-tag,
.status-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
    background: rgba(1,5,68,0.08);
    color: var(--text-secondary);
}
.role-tag.role-admin {
    background: rgba(206,87,193,0.14);
    color: var(--accent-dark);
}
.status-tag.status-active {
    background: rgba(16,185,129,0.14);
    color: #059669;
}

/* 表单 */
.admin-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.admin-field { display: flex; flex-direction: column; gap: 5px; }
.admin-field label { font-size: 13px; font-weight: 600; color: var(--text-secondary); }
.admin-field textarea { resize: vertical; }
.admin-field-help {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    font-size: 12px;
    line-height: 1.45;
    color: var(--text-muted);
}
.admin-field-help span:last-child {
    flex-shrink: 0;
    font-weight: 700;
}
.admin-field-help .is-warning { color: #b56a00; }
.admin-field-help .is-danger { color: #d63b3b; }
.admin-goods-cell {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}
.admin-goods-cover {
    width: 42px;
    height: 42px;
    border-radius: 8px;
    object-fit: cover;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: rgba(1,5,68,0.06);
    font-size: 24px;
}
.admin-goods-cover--emoji {
    object-fit: initial;
}
.goods-form-image-preview {
    width: 160px;
    height: 112px;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid rgba(1,5,68,0.1);
    background: rgba(1,5,68,0.04);
}
.goods-form-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 弹窗 */
.admin-modal-overlay {
    position: fixed; inset: 0; background: rgba(1,5,68,0.4); backdrop-filter: blur(4px);
    display: flex; align-items: center; justify-content: center; z-index: 2000; padding: 20px;
}
.admin-modal {
    background: #fff; border-radius: 16px; padding: 28px; max-width: 560px; width: 100%;
    max-height: 85vh; overflow-y: auto; position: relative;
}
.admin-modal.admin-modal-wide { max-width: 1080px; }
.admin-modal.admin-modal-workspace {
    width: min(1320px, calc(100vw - 32px));
    max-width: min(1320px, calc(100vw - 32px));
    max-height: calc(100vh - 32px);
    padding: 24px;
}
.admin-modal.admin-modal-attachments {
    width: min(1280px, calc(100vw - 32px));
    max-width: min(1280px, calc(100vw - 32px));
    max-height: calc(100vh - 32px);
    padding: 24px;
}
.admin-modal h3 { font-size: 18px; color: var(--primary); margin-bottom: 18px; }
.admin-modal-close {
    position: absolute; top: 14px; right: 18px; border: none; background: transparent;
    font-size: 26px; color: var(--text-muted); cursor: pointer; line-height: 1;
}

.admin-attachment-panel { display: grid; gap: 14px; }
.admin-attachment-upload {
    padding: 16px; border-radius: 12px;
    background: rgba(1,5,68,0.035);
}
.admin-attachment-upload-row {
    display: grid; grid-template-columns: minmax(280px, 1fr) 120px; gap: 10px;
}
.admin-attachment-toolbar {
    display: flex; align-items: center; justify-content: flex-end;
    gap: 8px; flex-wrap: wrap;
}
.admin-attachment-table-wrap {
    width: 100%; max-width: 100%; overflow-x: auto;
    border: 1px solid rgba(1,5,68,0.08); border-radius: 12px;
    -webkit-overflow-scrolling: touch;
}
.admin-attachment-table {
    min-width: 980px; box-shadow: none; border-radius: 0;
}
.admin-attachment-table th,
.admin-attachment-table td { white-space: nowrap; }
.admin-attachment-table th:first-child,
.admin-attachment-table td:first-child { text-align: center; }

/* 积分发放卡片 */
.points-grant-card { padding: 24px; border-radius: 14px; margin-bottom: 16px; }
.points-grant-card h3 { font-size: 16px; color: var(--primary); margin-bottom: 16px; }
.admin-form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 18px; }
.admin-note { font-size: 13px; color: var(--text-muted); }
.admin-filter-bar {
    display: grid;
    grid-template-columns: minmax(220px, 1fr) minmax(140px, 180px) minmax(140px, 180px) auto;
    gap: 10px;
    align-items: center;
    margin: 14px 0 16px;
}
.admin-filter-bar .btn {
    white-space: nowrap;
}

/* 后台响应式 */
/* —— 现场签到模块 —— */
.checkin-workspace {
    display: grid;
    gap: 16px;
}
.checkin-panel {
    padding: 24px 28px;
    border-radius: 16px;
    border: 1px solid var(--border);
    background: #fff;
}
.checkin-panel-desc {
    max-width: 680px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: 16px;
}
.checkin-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}
.checkin-flow-compact {
    display: grid;
    gap: 10px;
    padding: 18px 20px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: #fff;
}
.checkin-flow-row {
    display: flex;
    align-items: baseline;
    gap: 10px;
    font-size: 13px;
}
.checkin-flow-row span {
    flex: 0 0 auto;
    color: var(--accent);
    font-weight: 900;
    min-width: 14px;
}
.checkin-flow-row p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.6;
}
.checkin-flow-row strong {
    color: var(--primary);
    font-weight: 700;
}
.checkin-config {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 14px;
}
.checkin-config {
    display: grid;
    grid-template-columns: minmax(220px, 1fr) auto;
    gap: 12px 18px;
    align-items: center;
    padding: 18px;
}
.checkin-config h4 { font-size: 15px; color: var(--primary); margin-bottom: 6px; }
.checkin-config p { font-size: 13px; color: var(--text-secondary); margin-bottom: 0; line-height: 1.6; }
.checkin-config code { background: rgba(1,5,68,0.08); padding: 2px 6px; border-radius: 4px; font-family: 'KaTeX', monospace; font-size: 12px; }
.checkin-config-input {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: minmax(240px, 1fr) auto;
    gap: 8px;
    align-items: center;
}
.checkin-config .admin-note {
    grid-column: 1 / -1;
}
/* ============================================
   关于我们新布局
   ============================================ */
/* 关于我们：左侧线稿插画 + 右侧标题/说明/横排统计 */
.about-intro-v2 {
    display: flex;
    align-items: stretch;
    gap: 28px;
    margin-bottom: 48px;
    margin-left: -32px;
}
.about-intro-illo {
    flex-shrink: 0;
    align-self: flex-start;
    width: 300px;
    margin-top: -28px;
    transform: translate(-22px, 22px);
    background: #5267a8;
    mix-blend-mode: multiply;
    opacity: 0.92;
    -webkit-mask-image: linear-gradient(180deg, #000 0, #000 92%, transparent 100%);
    mask-image: linear-gradient(180deg, #000 0, #000 92%, transparent 100%);
}
.about-intro-illo img {
    width: 100%;
    height: auto;
    display: block;
    mix-blend-mode: screen;
    filter: contrast(1.05);
}
.about-intro-content {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}
.about-intro-title {
    font-size: 26px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 6px;
}
.about-intro-subtitle {
    font-size: 14px;
    font-weight: 600;
    color: var(--blue);
    margin-bottom: 16px;
}
.about-intro-text {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 0;
    max-width: none;
}

/* 关于我们：部门设置（左对齐标题 + 三栏卡片，嵌入右列填充右下空区） */
#about .section-header {
    text-align: left;
    margin-left: 0;
    margin-right: 0;
}
.about-dept-section {
    margin-top: auto;
    padding-top: 32px;
}
.about-dept-heading {
    text-align: left;
    margin-bottom: 18px;
}
.about-dept-heading h3 {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 600;
    color: var(--primary);
    margin: 0 0 10px;
}
.about-dept-accent {
    display: block;
    width: 44px;
    height: 2px;
    background: var(--accent);
    margin: 0;
}
.about-dept-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-right: -24px;
}
.about-dept-card {
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 18px;
    background: #fff;
    transition: box-shadow 0.25s ease, transform 0.25s ease;
}
.about-dept-card:hover {
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}
.about-dept-card-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 19px;
    margin-bottom: 14px;
}
.about-dept-card-icon.about-dept-icon--academic { background: rgba(0, 113, 184, .12); color: var(--blue); }
.about-dept-card-icon.about-dept-icon--activity { background: rgba(120, 56, 145, .1); color: var(--purple); }
.about-dept-card-icon.about-dept-icon--modeling { background: rgba(0, 159, 197, .14); color: var(--cyan); }
.about-dept-card h4 {
    font-family: var(--font-heading);
    font-size: 17px;
    font-weight: 600;
    color: var(--primary);
    margin: 0 0 2px;
}
.about-dept-card-en {
    font-size: 11.5px;
    color: var(--text-muted);
    margin: 0 0 12px;
}
.about-dept-card-desc {
    font-size: 12.5px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0 0 12px;
}
.about-dept-card-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}
.about-dept-tag {
    font-size: 10.5px;
    font-weight: 600;
    padding: 2px 9px;
    border-radius: 5px;
}
.about-dept-tag--academic { color: var(--blue); background: rgba(0, 113, 184, .08); }
.about-dept-tag--activity { color: var(--purple); background: rgba(120, 56, 145, .08); }
.about-dept-tag--modeling { color: #0a6478; background: rgba(0, 159, 197, .1); }


/* ============================================
   公告详情页
   ============================================ */

/* 大标题区（全宽深蓝渐变，比 sub-hero 更大） */
.notice-detail-hero {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #010544 0%, #1a2563 40%, #2d3a8a 100%);
    padding: 120px 20px 80px;
    text-align: center;
}
.notice-detail-hero .hero-bg {
    position: absolute; inset: 0; z-index: 0; opacity: 0.5;
}
.notice-detail-hero-content {
    position: relative; z-index: 2; max-width: 760px; margin: 0 auto;
}
.notice-detail-tags {
    display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-bottom: 20px;
}
.notice-detail-type {
    display: inline-block; padding: 4px 14px; border-radius: 999px;
    background: rgba(255,255,255,0.18); color: #fff;
    font-size: 13px; font-weight: 700;
}
.notice-detail-grade {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 999px;
    background: rgba(206, 87, 193, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.16);
    color: #fff;
    font-size: 13px;
    font-weight: 800;
}
.notice-detail-pri {
    display: inline-block; padding: 4px 14px; border-radius: 999px;
    font-size: 13px; font-weight: 700; color: #fff;
}
.notice-detail-pri--urgent { background: var(--accent); animation: badgePulse 2s infinite; }
.notice-detail-pri--important { background: rgba(255,255,255,0.25); }
.notice-detail-title {
    font-family: var(--font-heading);
    font-size: clamp(26px, 4vw, 38px); font-weight: 600; color: #fff;
    line-height: 1.3; margin-bottom: 20px;
}
.notice-detail-meta {
    display: flex; justify-content: center; gap: 24px; flex-wrap: wrap;
    font-size: 14px; color: rgba(255,255,255,0.72);
}

/* 正文容器（800px 居中阅读区） */
.notice-detail-container {
    max-width: 800px; margin: 0 auto;
}

/* 活动信息条：单张扁平卡，横向排列，线性图标 */
.notice-event-info {
    display: flex; flex-wrap: wrap; gap: 20px;
    padding: 16px 20px;
    border: 0.5px solid var(--border);
    border-radius: 12px;
    background: var(--bg-alt);
    margin-bottom: 32px;
}
.notice-event-item {
    display: flex; align-items: center; gap: 8px;
}
.notice-event-icon { font-size: 16px; flex-shrink: 0; color: var(--blue); }
.notice-event-label { font-size: 12px; color: var(--text-muted); font-weight: 500; }
.notice-event-value { font-size: 13px; color: var(--text); font-weight: 500; line-height: 1.4; }

/* 海报 */
.notice-poster { margin-bottom: 40px; text-align: center; }
.notice-poster-img {
    max-width: 100%; max-height: 600px;
    border-radius: 16px; box-shadow: var(--shadow-lg);
    display: inline-block;
}

/* 正文排版 */
.notice-content { margin-bottom: 40px; }
.notice-content-para { margin-bottom: 20px; }
.notice-content-p {
    font-size: 15px; line-height: 1.9; color: var(--text);
    margin: 0;
}
.notice-content-subhead {
    font-size: 17px; font-weight: 700; color: var(--primary);
    margin: 8px 0 10px;
}
.notice-source-file {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin: -18px 0 40px;
    padding: 14px 16px;
    border: 1px solid rgba(1,5,68,0.08);
    border-radius: 12px;
    background: rgba(1,5,68,0.03);
}
.notice-source-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
}
.notice-source-name {
    margin-top: 2px;
    font-size: 12px;
    color: var(--text-muted);
}

/* 公告详情页：changelog 风格文章版式 */
.notice-detail-hero.notice-detail-hero--article {
    background:
        radial-gradient(circle at 18% 0%, rgba(206, 87, 193, 0.10), transparent 34%),
        linear-gradient(180deg, #f8f9fd 0%, #fff 100%);
    padding: 136px 24px 48px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
/* 公告详情 hero 内容盒不放宽：与正文阅读列（760px）同宽同中，保持同一条左缘线 */
.notice-detail-backlink {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 26px;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--bg-alt);
    border: 0.5px solid var(--border);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    transition: all 0.25s;
}
.notice-detail-backlink:hover { color: var(--blue); border-color: var(--border-strong); }
.notice-detail-hero--article .notice-detail-tags {
    justify-content: flex-start;
    margin-bottom: 20px;
}
.notice-detail-hero--article .notice-detail-type,
.notice-detail-hero--article .notice-detail-grade,
.notice-detail-hero--article .notice-detail-pri {
    color: var(--primary);
    background: rgba(1, 5, 68, 0.07);
    border: 1px solid rgba(1, 5, 68, 0.06);
}
.notice-detail-hero--article .notice-detail-grade {
    color: var(--accent-dark);
    background: rgba(206, 87, 193, 0.10);
}
.notice-detail-hero--article .notice-detail-pri--urgent {
    color: #fff;
    background: var(--accent);
    border-color: transparent;
}
.notice-detail-hero--article .notice-detail-pri--important {
    color: var(--accent-dark);
    background: rgba(206, 87, 193, 0.12);
}
.notice-detail-hero--article .notice-detail-title {
    max-width: 880px;
    color: var(--primary);
    font-size: clamp(34px, 5vw, 60px);
    line-height: 1.08;
    margin-bottom: 18px;
}
.notice-detail-summary {
    max-width: 720px;
    margin: 0 0 22px;
    color: var(--text-secondary);
    font-size: 18px;
    line-height: 1.75;
}
.notice-detail-hero--article .notice-detail-meta {
    justify-content: flex-start;
    gap: 16px;
    color: var(--text-muted);
}
.notice-detail-hero--article .notice-detail-meta span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.notice-detail-hero--article .notice-detail-meta span + span::before {
    content: '';
    width: 4px;
    height: 4px;
    border-radius: 999px;
    background: rgba(1, 5, 68, 0.28);
    margin-right: 8px;
}
.notice-detail-error {
    max-width: 680px;
    padding: 42px;
    border-radius: 18px;
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
}
.notice-detail-error h1 {
    color: var(--primary);
    font-size: 30px;
    margin-bottom: 10px;
}
.notice-detail-error p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}
.notice-article-section {
    padding: 56px 24px 96px;
    background: #fff;
}
.notice-detail-container.notice-detail-layout {
    max-width: 760px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 32px;
}
.notice-article-main {
    min-width: 0;
}
.notice-article-aside {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
/* TOC 在窄正文下作为底部小卡片，不再 sticky 侧栏 */
.notice-toc-card { order: -1; }
.notice-side-card {
    padding: 20px;
    border-radius: 14px;
    background: #fff;
    border: 1px solid var(--border);
    box-shadow: 0 14px 34px rgba(1, 5, 68, 0.05);
}
.notice-side-eyebrow {
    margin-bottom: 14px;
    color: var(--primary);
    font-size: 13px;
    font-weight: 800;
}
.notice-side-meta-list {
    display: grid;
    gap: 12px;
}
.notice-side-meta-row {
    display: grid;
    gap: 3px;
}
.notice-side-meta-row dt {
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 700;
}
.notice-side-meta-row dd {
    color: var(--text);
    font-size: 14px;
    line-height: 1.55;
    margin: 0;
}
.notice-toc-list {
    display: grid;
    gap: 6px;
}
.notice-toc-link {
    display: block;
    padding: 7px 10px;
    border-radius: 8px;
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.4;
}
.notice-toc-link:hover {
    color: var(--accent-dark);
    background: rgba(206, 87, 193, 0.08);
}
.notice-toc-link--h3 {
    padding-left: 22px;
    font-size: 12px;
}
.notice-side-actions {
    display: grid;
    gap: 8px;
}
.notice-side-link {
    color: var(--primary);
    font-size: 14px;
    font-weight: 800;
}
.notice-side-link:hover { color: var(--accent-dark); }
.notice-article-content {
    color: var(--text);
    font-size: 17px;
    line-height: 1.88;
}
.notice-article-content > *:first-child { margin-top: 0; }
.notice-article-content h2,
.notice-article-content h3 {
    scroll-margin-top: 110px;
}
.notice-article-content h2 {
    margin: 42px 0 14px;
    color: var(--primary);
    font-size: 26px;
    line-height: 1.28;
}
.notice-article-content h3 {
    margin: 30px 0 10px;
    color: var(--primary);
    font-size: 21px;
    line-height: 1.32;
}
.notice-article-content p,
.notice-article-content li {
    color: var(--text);
    font-size: 17px;
    line-height: 1.88;
}
.notice-article-content a {
    color: var(--accent-dark);
    text-decoration: underline;
    text-underline-offset: 4px;
}
.notice-article-content blockquote {
    margin: 28px 0;
    padding: 18px 22px;
    border-left: 4px solid var(--accent);
    background: rgba(206, 87, 193, 0.07);
    border-radius: 0 12px 12px 0;
}
.notice-article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 14px;
}
.notice-article-content th,
.notice-article-content td {
    padding: 12px;
    border: 1px solid var(--border);
    text-align: left;
}
.notice-article-content th {
    background: var(--bg-alt);
    color: var(--primary);
}
.notice-article-attachments {
    margin-top: 48px;
}
.notice-article-section .notice-event-info {
    margin-bottom: 34px;
}
.notice-article-section .notice-poster {
    text-align: left;
}

/* ============================================
   板块正文 + 富文本编辑器（module.html）
   ============================================ */
.module-intro-card {
    width: 100%;
    max-width: var(--module-content-width, 860px);
    margin-left: auto;
    margin-right: auto;
    margin-top: 0;
    margin-bottom: 30px;
    padding: 24px 28px;
    border-radius: 14px;
    background: rgba(255,255,255,0.82);
    border: 1px solid rgba(1,5,68,0.08);
    box-shadow: 0 12px 32px rgba(1,5,68,0.06);
}
.module-intro-card p {
    margin: 0;
    white-space: pre-line;
    line-height: 1.85;
    font-size: 15px;
    color: var(--text-secondary);
}
.module-section-heading {
    width: 100%;
    max-width: var(--module-content-width, 860px);
    margin-left: auto;
    margin-right: auto;
    margin-top: 0;
    margin-bottom: 18px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(1,5,68,0.1);
}
.module-section-heading span {
    font-size: 18px;
    font-weight: 800;
    color: var(--primary);
}
.module-section-heading small {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-muted);
}
.module-section-heading--compact {
    max-width: none;
    margin: 0 0 14px;
    padding-bottom: 8px;
}
.module-content {
    width: 100%;
    max-width: var(--module-content-width, 860px);
    margin-left: auto;
    margin-right: auto;
    line-height: 1.85;
    color: var(--text-primary);
    font-size: 16px;
}
.module-content h1 {
    font-size: 28px; font-weight: 800; color: var(--primary);
    margin: 0 0 18px;
}
.module-content h2 {
    font-size: 22px; font-weight: 700; color: var(--primary);
    margin: 32px 0 14px; padding-bottom: 8px;
    border-bottom: 2px solid rgba(1,5,68,0.08);
}
.module-content h3 {
    font-size: 18px; font-weight: 700; color: var(--primary);
    margin: 24px 0 10px;
}
.module-content h4 {
    font-size: 16px; font-weight: 700; color: var(--primary);
    margin: 18px 0 8px;
}
.module-content p { margin: 12px 0; }
.module-content ul, .module-content ol { margin: 12px 0; padding-left: 24px; }
.module-content li { margin: 6px 0; }
.module-content blockquote {
    margin: 16px 0; padding: 12px 18px;
    border-left: 4px solid var(--accent);
    background: rgba(206,87,193,0.06);
    border-radius: 0 8px 8px 0;
    color: var(--text-secondary);
}
.module-content img { max-width: 100%; border-radius: 10px; margin: 12px 0; }
.module-content a { color: var(--accent); text-decoration: underline; }
.module-content pre {
    background: rgba(1,5,68,0.05); padding: 14px 16px; border-radius: 8px;
    overflow-x: auto; font-family: 'KaTeX', monospace;
}
.module-content code, .module-content .math-inline {
    font-family: 'KaTeX', monospace;
    background: rgba(1,5,68,0.06); padding: 2px 6px; border-radius: 4px;
    color: var(--accent); font-size: 15px;
}
.module-content hr {
    border: none; border-top: 1px dashed rgba(1,5,68,0.2);
    margin: 24px 0;
}
.module-empty {
    text-align: center; padding: 60px 20px; color: var(--text-secondary);
    background: rgba(1,5,68,0.03); border-radius: 12px; font-size: 15px;
}

/* 管理员操作栏 */
.module-admin-bar {
    width: 100%;
    max-width: var(--module-content-width, 760px);
    margin-left: auto;
    margin-right: auto;
    margin-top: 0;
    margin-bottom: 20px;
    display: flex; align-items: center; gap: 14px;
}
.module-admin-hint { font-size: 13px; color: var(--text-secondary); }

/* 编辑器工具栏 */
.editor-toolbar {
    width: 100%;
    max-width: var(--module-content-width, 760px);
    margin-left: auto;
    margin-right: auto;
    margin-top: 0;
    margin-bottom: 12px;
    display: flex; flex-wrap: wrap; align-items: center; gap: 4px;
    padding: 10px 12px;
    background: rgba(255,255,255,0.7);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(1,5,68,0.1);
    border-radius: 10px;
    position: sticky; top: 70px; z-index: 20;
}
.editor-btn {
    min-width: 34px; height: 34px; padding: 0 8px;
    border: 1px solid transparent; border-radius: 6px;
    background: transparent; cursor: pointer;
    font-size: 14px; font-weight: 600; color: var(--primary);
    transition: all 0.15s ease;
    font-family: 'KaTeX', monospace;
}
.editor-btn:hover {
    background: rgba(1,5,68,0.08); border-color: rgba(1,5,68,0.15);
}
.editor-sep {
    width: 1px; height: 22px; background: rgba(1,5,68,0.15); margin: 0 4px;
}

/* 编辑区 */
.editor-area {
    min-height: 360px; padding: 24px 28px;
    border: 2px solid rgba(1,5,68,0.12); border-radius: 12px;
    background: #fff; outline: none;
    transition: border-color 0.2s ease;
    width: 100%;
    max-width: var(--module-content-width, 760px);
    margin-left: auto;
    margin-right: auto;
    box-shadow: var(--shadow);
}
.editor-area:focus { border-color: var(--accent); }
.editor-actions {
    width: 100%;
    max-width: var(--module-content-width, 760px);
    margin-left: auto;
    margin-right: auto;
    margin-top: 16px;
    margin-bottom: 0;
    display: flex; gap: 12px;
}

/* 专题详情页阅读轨道：适宜行宽，与 hero / 信息条共享同一条居中左缘线。 */
.module-detail-body .module-content,
.module-detail-body .editor-toolbar,
.module-detail-body .editor-area,
.module-detail-body .editor-actions {
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   API 失败三态（加载失败卡片 + 本地兜底提示条）
   ============================================ */
.api-error-card {
    grid-column: 1 / -1;
    text-align: center;
    padding: 48px 24px;
    border-radius: var(--radius);
    border: 1px dashed var(--accent);
}
.api-error-icon { font-size: 44px; margin-bottom: 12px; }
.api-error-text { font-size: 16px; font-weight: 600; color: var(--primary); margin-bottom: 6px; }
.api-error-hint { font-size: 13px; color: var(--text-secondary); margin-bottom: 16px; }
/* admin 表格内的错误态（窄内边距，适配表格容器） */
.admin-table-wrap .api-error-card { padding: 32px 16px; }
/* 本地兜底数据提示条（首页/分支页后端挂时显示） */
.api-stale-hint {
    grid-column: 1 / -1;
    padding: 10px 16px; margin-bottom: 16px;
    border-radius: 8px;
    background: rgba(206,87,193,0.08);
    border-left: 3px solid var(--accent);
    font-size: 13px; color: var(--text-secondary);
}

/* ============================================
   资料与习题库页（materials.html）— 双栏文件管理器
   （2026-07-11 重设计：左课程目录 + 右资料工作区）
   ============================================ */
.materials-search-wrap { position: relative; }
.materials-search-icon {
    position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
    font-size: 15px; color: var(--text-muted); pointer-events: none;
}
.materials-search {
    width: 100%; padding: 10px 14px 10px 40px; font-size: 14px;
    border: 1px solid var(--border); border-radius: 10px;
    background: var(--surface); color: var(--text); outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.materials-search:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(0,113,184,0.1); }

.mat-tp-layout { display: flex; gap: 44px; align-items: flex-start; }
.mat-tp-side { flex: 0 0 250px; position: sticky; top: 96px; }
.mat-tp-side .materials-search-wrap { margin-bottom: 16px; }
.mat-tp-nav { display: flex; flex-direction: column; }
.mat-tp-group-label {
    font-size: 11px; font-weight: 600; letter-spacing: 0.08em;
    text-transform: uppercase; color: var(--text-muted);
    margin: 14px 0 5px;
}
.mat-tp-group:first-child .mat-tp-group-label { margin-top: 0; }
.mat-tp-course {
    display: flex; align-items: center; gap: 8px;
    width: 100%; padding: 7px 10px;
    border: none; background: none; border-radius: 8px;
    font-size: 13.5px; color: var(--text-secondary);
    cursor: pointer; text-align: left;
    transition: background 0.2s ease, color 0.2s ease;
}
.mat-tp-course:hover { background: rgba(1,5,68,0.04); color: var(--primary); }
.mat-tp-course.active { background: rgba(0,113,184,0.08); color: var(--primary); font-weight: 600; }
.mat-tp-code {
    font-family: 'SFMono-Regular', Consolas, monospace;
    font-size: 12px; color: var(--blue); flex-shrink: 0;
}
.mat-tp-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.mat-tp-star { font-size: 11px; color: var(--gold); flex-shrink: 0; }
.mat-tp-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--blue); flex-shrink: 0; }
.mat-tp-nav-empty { padding: 12px 10px; font-size: 13px; color: var(--text-muted); }

.mat-tp-main { flex: 1; min-width: 0; }
.mat-tp-loading { padding: 40px 0; color: var(--text-secondary); font-size: 14px; }
.mat-tp-head {
    display: flex; align-items: flex-start; justify-content: space-between;
    gap: 16px; flex-wrap: wrap;
}
.mat-tp-head h2 {
    font-family: var(--font-heading);
    font-size: 24px; font-weight: 600; color: var(--primary);
    margin: 0 0 6px;
}
.mat-tp-head-meta {
    font-size: 12.5px; color: var(--text-muted); margin: 0;
    font-variant-numeric: tabular-nums;
}
.mat-tp-head-actions { display: flex; gap: 8px; flex-shrink: 0; }
.mat-tp-detail-search { margin: 16px 0 22px; max-width: 360px; }
.mat-tp-section { margin-bottom: 20px; }
.mat-tp-section-head {
    display: flex; align-items: center; gap: 8px;
    width: 100%; padding: 8px 0;
    border: none; background: none; cursor: pointer;
    font-size: 14px; font-weight: 600; color: var(--primary);
    border-bottom: 1px solid var(--border);
    text-align: left;
}
.mat-tp-section-head i { font-size: 14px; color: var(--text-muted); }
.mat-tp-section-count { margin-left: auto; font-size: 12px; font-weight: 400; color: var(--text-muted); }
.mat-tp-files { display: flex; flex-direction: column; }

.material-empty--compact {
    padding: 24px 12px;
    font-size: 14px;
}

/* 对齐的文件行：图标 | 名称 | 文件信息(右对齐) | 权限徽章(定宽) | 动作(定宽，容纳浏览+下载两个按钮) */
.material-row {
    display: grid;
    grid-template-columns: 26px minmax(0, 1fr) max-content 72px 70px;
    align-items: center;
    gap: 14px;
    padding: 10px 4px;
    border-bottom: 1px solid var(--bg-alt);
    transition: background 0.2s ease;
}
.mat-tp-files .material-row:last-child { border-bottom: none; }
.material-row:hover { background: rgba(1,5,68,0.02); }
.material-row-icon { font-size: 17px; color: var(--blue); text-align: center; }
.material-row-name {
    font-size: 13.5px; font-weight: 500; color: var(--text);
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.material-row-fileinfo {
    font-size: 11.5px; color: var(--text-muted);
    text-align: right; white-space: nowrap;
    font-variant-numeric: tabular-nums;
}
.mat-vis {
    font-size: 10.5px; font-weight: 500;
    padding: 2px 0; border-radius: 5px;
    background: var(--bg-alt); color: var(--text-secondary);
    text-align: center;
}
.mat-vis--public { background: rgba(0,113,184,0.1); color: var(--blue); }
.mat-vis--points { background: rgba(237,182,71,0.18); color: #7a5308; }
.material-row-action { display: flex; justify-content: flex-end; gap: 4px; }
.mat-act {
    width: 32px; height: 32px;
    padding: 0; min-width: 0;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: 8px; font-size: 15px;
}

/* —— 资料在线浏览弹窗（PDF iframe 预览） —— */
.preview-overlay {
    position: fixed;
    inset: 0;
    z-index: 2100;
    background: rgba(1, 5, 68, 0.72);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    animation: previewFadeIn 0.25s ease;
}
/* hidden 属性会被 display:flex 覆盖，必须显式关掉（否则遮罩从加载起就盖住整页） */
.preview-overlay[hidden] { display: none; }
.preview-modal {
    width: 100%;
    max-width: 1080px;
    height: min(88vh, 940px);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: previewPop 0.3s cubic-bezier(0.34, 1.4, 0.64, 1);
}
.preview-topbar {
    flex: none;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px 12px 18px;
    border-bottom: 1px solid var(--bg-alt);
}
.preview-title {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
}
.preview-title .ti { flex: none; font-size: 17px; color: var(--blue); }
.preview-title span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.preview-tools { flex: none; display: flex; gap: 6px; }
.preview-tool {
    width: 34px; height: 34px;
    border-radius: 8px;
    display: grid;
    place-items: center;
    font-size: 16px;
    color: var(--text-secondary);
    background: transparent;
    transition: all 0.2s;
}
.preview-tool:hover { background: var(--bg-alt); color: var(--primary); }
.preview-body {
    flex: 1;
    position: relative;
    background: #52565a;
}
.preview-frame {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}
.preview-status[hidden] { display: none; }
.preview-status {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    padding: 24px;
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
}
.preview-status .ti { font-size: 36px; opacity: 0.9; }
.preview-status--spin .ti { animation: previewSpin 1s linear infinite; }
@keyframes previewFadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes previewPop { from { transform: scale(0.96) translateY(14px); opacity: 0; } to { transform: scale(1) translateY(0); opacity: 1; } }
@keyframes previewSpin { to { transform: rotate(360deg); } }

@media (max-width: 900px) {
    .mat-tp-layout { flex-direction: column; gap: 24px; }
    .mat-tp-side { position: static; flex: none; width: 100%; }
    .mat-tp-group { display: inline; }
    .mat-tp-group-label { margin: 10px 0 5px; }
    .mat-tp-nav { display: block; }
    .mat-tp-course { display: inline-flex; width: auto; padding: 6px 10px; }
}
@media (max-width: 560px) {
    .material-row { grid-template-columns: 22px minmax(0, 1fr) max-content 60px 70px; gap: 9px; }
    .mat-tp-head h2 { font-size: 20px; }
    .preview-overlay { padding: 0; align-items: stretch; }
    .preview-modal { max-width: 100%; height: 100dvh; border-radius: 0; }
}
.material-empty {
    text-align: center; padding: 60px 20px; color: var(--text-muted);
    font-size: 16px; font-weight: 600;
}
.material-empty span { display: block; font-size: 13px; font-weight: 400; margin-top: 6px; }

/* ============================================
   资料库 v2 · 课程卡片浏览 + 折叠年级筛选
   ============================================ */
.mat-toolbar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.mat-search { flex: 1; min-width: 220px; margin: 0; }
.mat-filter-wrap { position: relative; }
.mat-filter {
    height: 40px; display: inline-flex; align-items: center; gap: 7px;
    padding: 0 13px; border: 1px solid var(--border-strong); border-radius: 8px;
    background: var(--bg); font-size: 13.5px; color: var(--text); cursor: pointer; white-space: nowrap;
}
.mat-filter:hover { border-color: var(--primary); }
.mat-filter-k { color: var(--text-muted); }
.mat-filter-chev { color: var(--text-muted); font-size: 15px; transition: transform 0.2s; }
.mat-filter.open .mat-filter-chev { transform: rotate(180deg); }
.mat-filter-menu {
    position: absolute; right: 0; top: calc(100% + 6px); z-index: 20; min-width: 154px;
    background: var(--bg); border: 1px solid var(--border-strong); border-radius: 10px;
    padding: 5px; box-shadow: var(--shadow-card);
}
.mat-filter-menu[hidden] { display: none; }
.mat-filter-opt {
    display: flex; align-items: center; gap: 8px; padding: 8px 10px; border-radius: 7px;
    font-size: 13.5px; color: var(--text-secondary); cursor: pointer;
}
.mat-filter-opt:hover { background: var(--bg-alt); }
.mat-filter-opt.sel { color: var(--primary); font-weight: 600; }
.mat-filter-opt .ti { margin-left: auto; color: var(--blue); font-size: 16px; }
.mat-recent-link {
    display: inline-flex; align-items: center; gap: 5px; border: none; background: none;
    cursor: pointer; font-size: 13px; color: var(--blue); white-space: nowrap; padding: 0;
}
.mat-recent-link.active { font-weight: 600; }
.mat-note { font-size: 12px; color: var(--text-muted); display: flex; align-items: center; gap: 6px; margin-bottom: 18px; }
.mat-note i { color: var(--blue); }

.mat-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 12px; }
.mat-card {
    position: relative; border: 1px solid var(--border); border-radius: 12px;
    padding: 16px 17px; background: var(--bg); cursor: pointer; text-align: left; width: 100%;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.mat-card:hover { border-color: var(--border-strong); box-shadow: var(--shadow-sm); }
.mat-card-line { width: 22px; height: 2px; background: var(--accent); margin-bottom: 13px; }
.mat-card-code {
    font-family: var(--font-heading);
    font-size: 26px; font-weight: 600; color: var(--primary); line-height: 1; letter-spacing: 0.01em;
}
.mat-card-name { font-size: 13.5px; color: var(--text-secondary); margin-top: 7px; }
.mat-card-div { height: 1px; background: var(--border); margin-top: 13px; }
.mat-card-foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-top: 11px; }
.mat-card-meta { font-size: 11px; color: var(--text-muted); font-variant-numeric: tabular-nums; }
.mat-card-mark { position: absolute; top: 14px; right: 14px; font-size: 13px; }
.mat-card-mark.star { color: var(--gold); }
.mat-card-mark.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--blue); }
.mat-card-common { font-size: 9.5px; padding: 1px 6px; border-radius: 5px; background: rgba(120,56,145,0.12); color: #5a2a70; flex-shrink: 0; }
.mat-detail-back {
    display: inline-flex; align-items: center; gap: 5px; border: none; background: none;
    cursor: pointer; font-size: 13px; color: var(--blue); margin-bottom: 16px; padding: 0;
}
.mat-detail[hidden], .mat-browse[hidden] { display: none; }

@media (max-width: 560px) {
    .mat-cards { grid-template-columns: 1fr 1fr; gap: 10px; }
    .mat-card { padding: 13px 13px 14px; }
    .mat-card-code { font-size: 21px; }
    .mat-card-name { font-size: 12px; }
}

/* 资料库 v2 · 卡片网格下方：权限说明条 + 校园线稿（拼接） */
.mat-legend {
    border-top: 1px solid var(--border);
    margin-top: 32px; padding-top: 26px;
    display: flex; gap: 36px; align-items: flex-end;
}
.mat-legend-illo { flex: 0 0 160px; display: flex; align-items: flex-end; justify-content: center; }
.mat-legend-illo img { width: 100%; max-width: 160px; height: auto; opacity: 0.9; }
.mat-legend-body { flex: 1; min-width: 0; }
.mat-legend-h {
    font-family: var(--font-heading);
    font-size: 15px; font-weight: 600; color: var(--primary); margin: 0 0 3px;
}
.mat-legend-sub { font-size: 11.5px; color: var(--text-muted); margin: 0 0 16px; }
.mat-legend-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 28px; }
.mat-legend-item { display: flex; align-items: center; gap: 10px; }
.mat-legend-badge { padding: 2px 9px; flex-shrink: 0; }
.mat-legend-txt { font-size: 12px; color: var(--text-secondary); }
.mat-legend-foot { font-size: 11.5px; color: var(--text-muted); margin: 16px 0 0; display: flex; align-items: center; gap: 6px; }
.mat-legend-foot i { color: #7a5308; }
@media (max-width: 760px) {
    .mat-legend-illo { display: none; }
    .mat-legend { gap: 0; margin-top: 24px; padding-top: 22px; }
}
@media (max-width: 560px) {
    .mat-legend-grid { grid-template-columns: 1fr; gap: 9px; }
}

/* ============================================
   资料来源徽标 + 后台上传表单
   ============================================ */
.vis-tag.vis-local  { background: rgba(16,185,129,.14); color: #059669; }
.vis-tag.vis-url    { background: rgba(100,116,139,.16); color: #475569; }
.mf-mode-switch { display: flex; gap: 20px; flex-wrap: wrap; padding: 4px 0; }
.mf-mode-opt { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; cursor: pointer; font-weight: 500; }
.mf-mode-opt input { margin: 0; }
.mf-block { padding: 4px 0; }
.mf-hint { font-size: 12px; color: var(--text-muted); margin-top: 6px; line-height: 1.5; }
.mf-curfile { font-size: 13px; color: var(--text); background: var(--bg-soft, rgba(0,0,0,.03)); padding: 10px 12px; border-radius: 8px; margin-bottom: 10px; }
.mf-curfile-size { color: var(--text-muted); font-size: 12px; margin-left: 6px; }
#mf-file { padding: 8px; }
.admin-textarea-tall { font-family: 'SFMono-Regular', Consolas, monospace; font-size: 13px; line-height: 1.6; resize: vertical; }
.admin-article-workspace { display: grid; gap: 16px; }
.admin-article-meta { align-items: end; margin-bottom: 0; }
.admin-article-save { margin-top: 4px; }
.admin-file-import-card {
    display: grid; grid-template-columns: minmax(260px, 420px) minmax(0, 1fr);
    gap: 14px; align-items: center;
    padding: 14px; border: 1px dashed rgba(1,5,68,.22);
    border-radius: 10px; background: rgba(1,5,68,.025);
    transition: border-color .18s ease, background .18s ease, box-shadow .18s ease;
}
.admin-file-import-card.is-dragging {
    border-color: var(--accent);
    background: rgba(206,87,193,.08);
    box-shadow: 0 10px 30px rgba(1,5,68,.08);
}
.admin-file-import-card .admin-input { background: #fff; }
.admin-file-import-meta { display: grid; gap: 4px; font-size: 13px; color: var(--text-secondary); line-height: 1.5; }
.admin-file-import-meta strong { color: var(--primary); font-size: 14px; }
.admin-markdown-editor {
    display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 12px; align-items: stretch;
}
.admin-markdown-editor textarea {
    min-height: 560px;
}
.admin-markdown-preview {
    min-height: 560px; max-height: calc(100vh - 330px); overflow: auto;
    padding: 18px 20px; border: 1px solid var(--border, rgba(0,0,0,.1));
    border-radius: 10px; background: #fff;
    max-width: none; margin: 0;
}
.admin-notebook-preview {
    min-height: 520px; max-height: calc(100vh - 360px); overflow: auto;
    padding: 18px 20px; border: 1px solid var(--border, rgba(0,0,0,.1));
    border-radius: 10px; background: #fff;
    margin-top: 12px; max-width: none;
}
.admin-markdown-preview table,
.module-content table {
    width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14px;
}
.admin-markdown-preview th,
.admin-markdown-preview td,
.module-content th,
.module-content td {
    border: 1px solid var(--border, rgba(0,0,0,.12)); padding: 8px 10px; text-align: left;
}
.admin-markdown-preview th,
.module-content th {
    background: rgba(1,5,68,0.04); font-weight: 700;
}
.admin-markdown-preview img,
.module-content img {
    display: block; height: auto;
}
.notebook-article { display: grid; gap: 18px; }
.notebook-cell {
    padding: 0 0 18px;
    border-bottom: 1px solid var(--border, rgba(0,0,0,.08));
}
.notebook-cell:last-child { border-bottom: 0; padding-bottom: 0; }
.notebook-code-label {
    display: inline-flex; align-items: center;
    height: 22px; padding: 0 8px; border-radius: 999px;
    background: rgba(1,5,68,.08); color: var(--primary);
    font-size: 12px; font-weight: 700; margin-bottom: 8px;
}
.notebook-code-input,
.notebook-output-text,
.notebook-output-error,
.notebook-cell-raw pre {
    white-space: pre-wrap; word-break: break-word;
    border-radius: 10px; padding: 12px 14px;
    font-size: 13px; line-height: 1.6;
}
.notebook-code-input { background: #f7f8fc; border: 1px solid rgba(1,5,68,.08); }
.notebook-output { margin-top: 10px; }
.notebook-output-text { background: #fbfbfd; border: 1px solid rgba(1,5,68,.06); color: var(--text-secondary); }
.notebook-output-error { background: #fff5f5; border: 1px solid rgba(220,38,38,.18); color: #b91c1c; }
.notebook-output-image img { max-width: 100%; height: auto; border-radius: 8px; border: 1px solid rgba(1,5,68,.08); }
.notebook-output-html { overflow-x: auto; }
.notebook-output-empty {
    margin-top: 10px; padding: 10px 12px; border-radius: 8px;
    background: rgba(148,163,184,.12); color: var(--text-muted); font-size: 13px;
}

/* ===== admin 模态框内的富文本编辑器容器 ===== */
.admin-rich-editor { border: 1px solid var(--border, rgba(0,0,0,.1)); border-radius: 10px; overflow: hidden; background: #fff; }
.admin-rich-editor .editor-toolbar { flex-wrap: wrap; }
.admin-rich-editor .editor-area { min-height: 240px; max-height: 480px; overflow-y: auto; }
/* contenteditable 空态占位符 */
.editor-area.editor-empty::before {
    content: attr(data-placeholder);
    color: var(--text-muted); pointer-events: none;
}
.admin-course-section-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    max-width: 360px;
}
.admin-course-sections { min-width: 120px; }
.admin-course-sections summary {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 0;
    color: var(--primary);
    font-size: 12px;
    font-weight:600;
    cursor: pointer;
    list-style: none;
}
.admin-course-sections summary::-webkit-details-marker { display: none; }
.admin-course-sections summary:hover { color: var(--accent-dark); }
.admin-course-sections summary:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}
.admin-course-sections summary i {
    color: var(--text-muted);
    font-size: 14px;
    transition: transform .18s ease;
}
.admin-course-sections[open] summary i { transform: rotate(180deg); }
.admin-course-sections-body { padding: 7px 0 2px; }
.admin-course-section-empty {
    color: var(--text-muted);
    font-size: 12px;
}
.admin-course-section-add {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    margin: 8px 0 0;
    padding: 2px 0;
}
.admin-course-detail-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 12px;
    padding: 18px;
    border: 1px solid var(--border, rgba(1,5,68,.1));
    border-radius: 12px;
    background: rgba(255,255,255,.78);
}
.admin-course-detail-head h3 {
    margin: 8px 0 6px;
    color: var(--primary);
    font-size: 22px;
}
.admin-course-detail-head p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 14px;
}
.admin-course-sections-panel {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
    padding: 12px;
    border: 1px solid rgba(1,5,68,.08);
    border-radius: 10px;
    background: rgba(248,249,255,.72);
}
@media (max-width: 900px) {
    .admin-course-detail-head {
        flex-direction: column;
    }
    .admin-course-detail-head .admin-row-actions {
        width: 100%;
        justify-content: flex-start;
    }
}
.admin-mini-link {
    margin-left: 4px;
    border: 0;
    background: transparent;
    color: var(--primary);
    font-size: 11px;
    font-weight: 800;
    cursor: pointer;
    padding: 0 2px;
}
.admin-mini-link-danger { color: #dc2626; }

/* ===== 专题附件下载区（module.html 用户端） ===== */
.module-attachments {
    width: 100%;
    max-width: var(--module-content-width, 860px);
    margin-left: auto;
    margin-right: auto;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--border, rgba(0,0,0,.08));
}
.module-attachments-title { font-size: 22px; font-weight: 700; margin-bottom: 20px; }
.module-attachments-list { display: grid; gap: 12px; }
.module-attachment-card {
    display: flex; align-items: center; gap: 16px;
    padding: 16px 20px; border-radius: 12px;
    background: var(--bg-alt);
    border: 0.5px solid var(--border);
}
.module-attachment-icon { font-size: 24px; flex-shrink: 0; color: var(--text-muted); }
.module-attachment-info { flex: 1; min-width: 0; }
.module-attachment-label { font-weight: 600; font-size: 15px; color: var(--text); margin-bottom: 4px; }
.module-attachment-meta { font-size: 12px; color: var(--text-muted); }
.module-attachment-btn { flex-shrink: 0; }
.module-empty-admin { color: var(--text-muted); font-size: 13px; font-weight: 400; }

/* ============================================
   响应式（统一收敛于此 — 所有桌面规则之后，避免顺序覆盖失效）
   断点：900px 平板/小屏档 | 560px 手机档
   ============================================ */
@media (max-width: 900px) {
    /* 导航栏折叠为汉堡菜单 */
    .nav-menu {
        position: absolute;
        top: 100%; left: 0; right: 0;
        flex-direction: column;
        background: var(--primary);
        padding: 16px;
        gap: 4px;
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        transition: transform 0.3s;
        border-bottom: 1px solid rgba(255,255,255,0.08);
        z-index: 999;
        max-height: calc(100vh - 60px);
        overflow-y: auto;
    }
    .nav-menu.open { transform: translateY(0); }
    .menu-toggle { display: flex; }
    .nav-actions .nav-guest,
    .nav-actions .nav-user { display: none !important; }
    .nav-menu .nav-mobile-auth {
        display: flex; flex-direction: column; gap: 8px;
        margin-top: 12px; padding-top: 12px;
        border-top: 1px solid rgba(255,255,255,0.12);
    }
    .nav-menu .nav-mobile-auth .btn {
        width: 100%; text-align: center; padding: 12px 16px; font-size: 15px;
    }
    .nav-menu .nav-mobile-auth .nav-mobile-points {
        color: var(--accent-light); font-size: 15px; font-weight: 700;
        text-align: center; padding: 8px 0;
    }

    /* 布局：双列/多列网格降为单列 */
    .extension-entry { grid-template-columns: 1fr; }
    .extension-cards { grid-template-columns: 1fr; }
    .detail-layout { grid-template-columns: 1fr; }
    .detail-sidebar { position: static !important; }
    .topic-cards { grid-template-columns: 1fr; }
    .module-grid { grid-template-columns: 1fr; }
    .pf-layout { grid-template-columns: 1fr; gap: 20px; }
    .pf-illo { display: none; }
    .pf-side { position: static; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
    .pf-side-label { display: none; }
    .pf-nav-item { padding: 10px 12px; border: 1px solid var(--border); justify-content: center; }
    .pf-nav-item.active { border-color: var(--primary); }
    .notification-item { grid-template-columns: 1fr; }
    .notification-actions { justify-content: flex-start; }
    .admin-notification-summary { grid-template-columns: 1fr; }
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-intro-v2 { flex-direction: column; gap: 24px; margin-left: 0; }
    .about-intro-illo { display: none; }
    .about-intro-content { width: 100%; }
    .about-dept-section { margin-top: 8px; padding-top: 24px; }
    .about-dept-cards { margin-right: 0; }
    .notice-card.featured { grid-column: span 1; }
    .notice-detail-hero.notice-detail-hero--article {
        padding: 112px 20px 42px;
    }
    .notice-detail-container.notice-detail-layout {
        gap: 28px;
        padding: 0 4px;
    }
    .notice-article-section {
        padding: 42px 20px 72px;
    }
    .footer-illo { display: none; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; padding-left: 0; }
    .footer-brand { grid-column: span 2; }
    .module-detail-hero {
        min-height: 360px;
        padding: 112px 18px 48px;
    }
    .module-detail-hero .hero-title {
        margin-bottom: 16px;
    }
    .module-detail-body {
        padding-top: 48px;
    }
    .module-intro-card,
    .module-section-heading,
    .module-content,
    .module-admin-bar,
    .editor-toolbar,
    .editor-area,
    .editor-actions,
    .module-attachments {
        max-width: 100%;
    }
    .module-intro-card {
        padding: 18px;
        margin-bottom: 24px;
    }
    .module-section-heading {
        align-items: flex-start;
    }
    /* 专题附件卡片手机端：按钮换行铺满 */
    .module-attachment-card { flex-wrap: wrap; gap: 10px; padding: 14px; }
    .module-attachment-btn { width: 100%; }
    .replay-toolbar {
        flex-direction: column;
        align-items: stretch;
    }
    .replay-search-wrap {
        flex: 1 1 auto;
    }
    .home-academic-panel {
        grid-template-columns: 1fr;
        padding: 24px;
    }
    .academic-detail-panel {
        position: static;
        min-height: auto;
    }
    .academic-detail-page {
        padding: 24px;
    }
    .academic-detail-layout {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .academic-detail-aside {
        position: static;
        border-left: 0;
        padding-left: 0;
        border-top: 0.5px solid var(--border);
        padding-top: 24px;
    }
    .academic-aside-illo {
        max-width: 360px;
    }
    .academic-admin-tools {
        align-items: flex-start;
        flex-direction: column;
    }
    .admin-markdown-editor { grid-template-columns: 1fr; }
    .admin-markdown-editor textarea,
    .admin-markdown-preview { min-height: 300px; }

    /* 管理后台：手机端改为顶部横向功能导航，内容区占满屏宽 */
    .admin-app { min-height: 100vh; }
    .admin-topbar {
        min-height: 60px; height: auto; padding: 10px 14px;
        gap: 10px; flex-wrap: wrap;
    }
    .admin-topbar .logo-title { font-size: 15px; }
    .admin-topbar-right { gap: 8px; font-size: 13px; }
    .admin-body { flex-direction: column; width: 100%; overflow-x: hidden; }
    .admin-sidebar {
        width: 100%; max-width: 100%;
        flex-direction: row; gap: 8px; overflow-x: auto;
        padding: 8px 12px; border-right: 0; border-bottom: 1px solid var(--border);
        position: sticky; top: 0; z-index: 40; background: #fff;
        -webkit-overflow-scrolling: touch;
    }
    .admin-nav {
        flex: 0 0 auto; white-space: nowrap;
        padding: 9px 12px; border-radius: 999px; font-size: 13px;
    }
    .admin-sidebar-divider { display: none; }
    .admin-content {
        width: 100%; max-width: 100%; box-sizing: border-box;
        padding: 16px; overflow-x: hidden;
    }
    .admin-mod-header { align-items: flex-start; gap: 12px; flex-wrap: wrap; }
    .admin-mod-header h2 { font-size: 18px; }
    .admin-user-stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
    .admin-user-stat-wide {
        grid-column: 1 / -1;
    }
    .admin-user-toolbar {
        grid-template-columns: 1fr 1fr;
        align-items: stretch;
    }
    .admin-user-toolbar #userSearch {
        grid-column: 1 / -1;
    }
    .admin-user-bulkbar {
        align-items: stretch;
    }
    .admin-user-bulk-left {
        width: 100%;
        margin-right: 0;
    }
    .admin-user-bulkbar .admin-input {
        flex: 1 1 170px;
        min-width: 0;
    }
    .admin-pagination {
        justify-content: flex-start;
        flex-wrap: wrap;
    }
    .admin-user-detail-main,
    .admin-user-detail-grid {
        grid-template-columns: 1fr;
        display: grid;
    }
    .admin-user-kpis {
        min-width: 0;
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
    .admin-tabs {
        width: 100%; overflow-x: auto; flex-wrap: nowrap;
        padding-bottom: 4px; -webkit-overflow-scrolling: touch;
    }
    .admin-tab { flex: 0 0 auto; padding: 8px 12px; }
    .admin-module-toolbar { align-items: stretch; gap: 10px; }
    .admin-inline-field { flex: 1 1 100%; min-width: 0; }
    .admin-table-wrap {
        width: 100%; max-width: 100%; overflow-x: auto;
        padding-bottom: 8px; -webkit-overflow-scrolling: touch;
    }
    .admin-table { min-width: 720px; box-shadow: none; border-radius: 10px; }
    .admin-row-actions { flex-wrap: wrap; white-space: normal; }
    .admin-modal-overlay { padding: 10px; align-items: flex-start; }
    .admin-modal {
        width: 100%; max-width: 100%; max-height: calc(100vh - 20px);
        padding: 18px; border-radius: 12px;
    }
    .admin-modal.admin-modal-workspace {
        width: 100%; max-width: 100%; max-height: calc(100vh - 20px);
        padding: 18px;
    }
    .admin-modal.admin-modal-attachments {
        width: 100%; max-width: 100%; max-height: calc(100vh - 20px);
        padding: 18px;
    }
    .admin-modal h3 { padding-right: 28px; }
    .admin-form, .admin-form-grid { grid-template-columns: 1fr; }
    .admin-filter-bar { grid-template-columns: 1fr; }
    .admin-attachment-upload-row { grid-template-columns: 1fr; }
    .admin-attachment-toolbar { justify-content: flex-start; }
    .admin-attachment-table { min-width: 920px; }
    .admin-markdown-editor { grid-template-columns: 1fr !important; }
    .admin-markdown-editor textarea,
    .admin-markdown-preview,
    .admin-notebook-preview { min-height: 300px; max-height: 420px; }
}


@media (max-width: 560px) {
    /* 基础间距 */
    .section { padding: 52px 0; }
    .container { padding: 0 18px; }
    .modal { padding: 28px 22px; }
    /* 资料与回放：hover 展开式列表手机端缩小字号/间距 */
    .dl-row { padding: 18px 4px; }
    .dl-row-title { font-size: 18px; margin-bottom: 4px; }
    .dl-row-hint { display: none; }
    .dl-row-desc {
        font-size: 12px; line-height: 1.5;
        display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .module-detail-hero {
        min-height: 330px;
        padding: 100px 18px 42px;
    }
    .module-section-heading {
        flex-direction: column;
        gap: 4px;
    }
    .module-intro-card p,
    .module-content {
        font-size: 15px;
        line-height: 1.8;
    }
    .admin-user-stats,
    .admin-user-toolbar {
        grid-template-columns: 1fr;
    }
    .admin-user-toolbar #userSearch {
        grid-column: auto;
    }
    .admin-user-kpis {
        grid-template-columns: 1fr;
    }
    .admin-user-profile {
        align-items: flex-start;
    }
    .replay-tl-list {
        padding-left: 18px;
    }
    .replay-tl-dot {
        left: -23px;
        width: 8px;
        height: 8px;
    }
    .replay-tl-head {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
    .academic-detail-panel {
        padding: 16px;
    }
    .academic-hero {
        min-height: 300px;
        padding: 92px 18px 42px;
    }
    .home-academic-panel {
        padding: 20px;
        border-radius: 14px;
    }
    .academic-detail-page {
        padding: 22px 20px;
    }
    .academic-detail-block h2 {
        font-size: 18px;
    }

    .notice-meta {
        row-gap: 8px;
        align-items: flex-start;
    }
    .notice-date {
        margin-left: 0;
    }
    .notice-badge {
        margin-left: auto;
    }

    /* Hero 区 */
    .hero { padding: 100px 18px 60px; }
    /* 主按钮紧凑 + 次按钮文字化：主按钮自适应宽度（不铺满），次按钮降级为文字链接 */
    .hero-buttons { flex-direction: row; justify-content: center; gap: 20px; flex-wrap: wrap; }
    .hero-buttons .btn { width: auto; }
    /* 主按钮：纯色胶囊（弃用渐变，避免品红铺满的压迫感），更克制 */
    .hero-buttons .btn-primary {
        padding: 10px 22px; font-size: 14px;
        background: var(--accent); box-shadow: none;
    }
    /* 次按钮：文字链接化（透明背景 + 下划线提示可点），降为辅助层级 */
    .hero-buttons .btn-ghost {
        background: transparent; color: rgba(255,255,255,0.78);
        padding: 6px 4px; font-size: 14px; box-shadow: none;
        text-decoration: underline; text-underline-offset: 4px;
        text-decoration-color: rgba(255,255,255,0.25);
    }
    .hero-buttons .btn-ghost:hover { color: #fff; background: transparent; text-decoration-color: rgba(255,255,255,0.6); }
    /* 手机端隐藏部分 Hero 装饰元素（减少视觉拥挤） */
    .hero-curve--rose,
    .hero-curve--circle,
    .hero-curve--bell,
    .hero-curve--integral,
    .hero-formula.f2,
    .hero-formula.f5,
    .hero-formula.f7,
    .hero-formula.f8,
    .hero-formula.f10,
    .hero-formula.f11 { display: none; }
    .hero-formula { font-size: 18px; }

    /* 网格进一步收紧为单列 */
    .branch-grid--pure { grid-template-columns: 1fr; }
    .about-features { grid-template-columns: 1fr; }
    .subsection-grid { grid-template-columns: 1fr; }

    /* 三大部门：手机端单列 */
    .about-dept-cards { grid-template-columns: 1fr; gap: 14px; }
    .about-dept-card { padding: 18px; }

    /* 资料卡手机端紧凑化：缩小内边距与行间距，减少纵向占用 */
    .download-grid { gap: 12px; }
    .download-card { padding: 14px; gap: 10px; }
    .download-card-top { gap: 12px; }
    .download-card-bottom { padding-top: 10px; }
    .file-icon { width: 40px; height: 50px; font-size: 11px; }
    .download-btn { height: 34px; min-width: 34px; padding: 0 10px; font-size: 13px; }

    /* 公告栏：手机端改为自动滑动的模糊卡组，保留查看全部公告入口 */
    #notices .section-header {
        margin-bottom: 26px;
    }
    .filter-group {
        width: 100%;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 2px;
        scrollbar-width: none;
    }
    .filter-group::-webkit-scrollbar { display: none; }
    .filter-btn {
        flex: 0 0 auto;
        padding: 8px 16px;
        font-size: 13px;
    }
    .notice-grid.notice-mobile-carousel {
        display: block;
        position: relative;
        height: 344px;
        margin: 0 -18px;
        overflow: hidden;
        touch-action: pan-y;
    }
    .notice-grid.notice-mobile-carousel .api-stale-hint {
        position: absolute;
        left: 22px;
        right: 22px;
        top: 0;
        z-index: 5;
    }
    .notice-grid.notice-mobile-carousel .notice-card {
        position: absolute;
        top: 4px;
        left: 26px;
        right: 26px;
        min-height: 304px;
        display: flex;
        flex-direction: column;
        padding: 22px;
        opacity: 0;
        pointer-events: none;
        transform: translate3d(30%, 0, 0) rotate(1.2deg) scale(0.82);
        transform-origin: center center;
        transition:
            transform 0.58s cubic-bezier(0.22, 0.72, 0.18, 1),
            opacity 0.42s ease;
        will-change: transform, opacity;
        contain: layout paint;
        -webkit-font-smoothing: antialiased;
    }
    .notice-grid.notice-mobile-carousel .notice-card.notice-carousel-extra {
        display: none;
    }
    .notice-grid.notice-mobile-carousel .notice-card.is-active {
        z-index: 4;
        opacity: 1;
        pointer-events: auto;
        transform: translate3d(0, 0, 0) rotate(0deg) scale(1);
        box-shadow: 0 24px 54px rgba(1, 5, 68, 0.18);
    }
    .notice-grid.notice-mobile-carousel .notice-card.is-prev {
        z-index: 2;
        opacity: 0.28;
        transform: translate3d(-48%, 0, 0) rotate(-1.8deg) scale(0.86);
    }
    .notice-grid.notice-mobile-carousel .notice-card.is-next {
        z-index: 3;
        opacity: 0.34;
        transform: translate3d(48%, 0, 0) rotate(1.8deg) scale(0.87);
    }
    .notice-grid.notice-mobile-carousel .notice-card.is-far {
        z-index: 1;
        opacity: 0;
        transform: translate3d(64%, 0, 0) rotate(2.4deg) scale(0.78);
    }
    .notice-grid.notice-mobile-carousel .notice-meta {
        margin-bottom: 12px;
    }
    .notice-grid.notice-mobile-carousel .notice-card h3 {
        font-size: 18px;
        line-height: 1.35;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .notice-grid.notice-mobile-carousel .notice-card p {
        -webkit-line-clamp: 2;
        margin-bottom: 16px;
    }
    .notice-grid.notice-mobile-carousel .notice-footer {
        margin-top: auto;
    }
    .notice-carousel-status:not([hidden]) {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 12px;
        margin-top: 8px;
    }
    .notice-carousel-dots {
        display: flex;
        align-items: center;
        gap: 7px;
    }
    .notice-carousel-dot {
        width: 7px;
        height: 7px;
        padding: 0;
        border: 0;
        border-radius: 999px;
        background: rgba(1, 5, 68, 0.16);
        transition: width 0.25s ease, background 0.25s ease, transform 0.25s ease;
    }
    .notice-carousel-dot.active {
        width: 22px;
        background: var(--accent);
        box-shadow: 0 6px 16px rgba(206, 87, 193, 0.28);
    }
    .notice-carousel-dot:focus-visible {
        outline: 2px solid var(--accent);
        outline-offset: 3px;
    }
    .notice-carousel-index {
        font-size: 12px;
        font-weight: 700;
        color: var(--text-muted);
        font-variant-numeric: tabular-nums;
    }
    .notice-carousel-edge {
        width: 30px;
        height: 30px;
        font-size: 21px;
        opacity: 0.65;
    }
    /* 时间线列表下展开按钮保持可用（不再强制隐藏）*/

    /* 卡片/条目改为纵向排列 */
    .module-meta-row { flex-direction: column; align-items: flex-start; }
    .resource-entry-grid { grid-template-columns: 1fr; }
    .replay-entry { flex-direction: column; align-items: flex-start; text-align: left; }
    .submission-card { flex-direction: column; align-items: flex-start; text-align: left; }
    .submission-card .btn { align-self: stretch; text-align: center; }
    .checkin-panel { padding: 20px; }
    .checkin-actions { flex-direction: column; }
    .checkin-actions .btn { width: 100%; }
    .checkin-config,
    .checkin-config-input {
        grid-template-columns: 1fr;
    }
    .pf-two { grid-template-columns: 1fr; }
    .pf-two-uneven { grid-template-columns: 1fr; }
    .pf-hero-side { gap: 18px; }
    /* 公告详情页：正文容器补左右边距（根因：容器是 .notice-detail-container 而非 .container，
       吃不到上面的 .container{padding:0 18px}，导致正文贴边） */
    .notice-detail-container { padding: 0 18px; }
    .notice-detail-hero { padding: 90px 18px 56px; }
    .notice-detail-hero.notice-detail-hero--article {
        padding: 96px 18px 34px;
    }
    .notice-detail-hero--article .notice-detail-title {
        font-size: 32px;
        line-height: 1.16;
    }
    .notice-detail-summary {
        font-size: 15px;
        line-height: 1.7;
    }
    .notice-article-section {
        padding: 30px 0 62px;
    }
    .notice-detail-container.notice-detail-layout {
        gap: 24px;
        padding: 0 18px;
    }
    .notice-side-card {
        padding: 16px;
        border-radius: 12px;
    }
    .notice-article-content,
    .notice-article-content p,
    .notice-article-content li {
        font-size: 16px;
        line-height: 1.82;
    }
    .notice-article-content h2 {
        font-size: 22px;
        margin-top: 32px;
    }
    .notice-article-content h3 {
        font-size: 19px;
    }
    .notice-article-section .notice-event-info {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    /* 正文排版：读优化的行高与段距，短内容也不显空 */
    .notice-content { margin-bottom: 32px; }
    .notice-content-p { font-size: 16px; line-height: 1.8; color: var(--text); }
    .notice-content-para { margin-bottom: 18px; }
    .notice-content-subhead { font-size: 17px; margin-top: 4px; }
    .notice-source-file { align-items: flex-start; flex-direction: column; }
    .notice-source-file .btn { width: 100%; }

    /* 杂项 */
    .ext-card { padding: 28px 22px; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-brand { grid-column: span 1; }
}

/* 无障碍：尊重「减少动态」偏好 */
@media (prefers-reduced-motion: reduce) {
    .hero-curve,
    .hero-formula {
        animation: none !important;
    }
    .notice-grid.notice-mobile-carousel .notice-card {
        transition: opacity 0.2s ease, transform 0.2s ease !important;
    }
}

/* 移动端性能保护：滚动内容上的 backdrop-filter 降级为纯色，避免 GPU 重绘卡顿。
   导航栏/弹窗等 fixed/sticky 元素保留 blur（面积小、不随滚动重绘）。 */
@media (max-width: 560px) {
    .filter-btn {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: var(--surface);
        box-shadow: none;
    }
    .section-tag {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: none;
        box-shadow: none;
    }
    .btn-ghost {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: var(--primary-100);
        box-shadow: none;
    }
    .notice-detail-backlink {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: var(--bg-alt);
        box-shadow: none;
    }
}

/* 手机端页脚：压缩纵向链接列表，修正社交图标显示 */
@media (max-width: 560px) {
    .footer {
        padding: 38px 0 max(18px, env(safe-area-inset-bottom));
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 18px;
        margin-bottom: 22px;
    }

    .footer-brand {
        display: grid;
        gap: 12px;
    }

    .footer-brand .logo {
        margin-bottom: 0;
    }

    .footer-brand p {
        max-width: none;
        margin: 0;
        font-size: 13px;
        line-height: 1.55;
        color: rgba(226, 231, 250, 0.78);
    }

    .social-links {
        display: flex;
        flex-wrap: wrap;
        gap: 9px;
        align-items: center;
        justify-content: start;
    }

    .social-links a {
        min-width: 38px;
        height: 38px;
        padding: 0 10px;
        border-radius: 10px;
    }

    .social-links a i {
        font-size: 16px;
    }

    .social-links a img {
        width: auto;
        height: 14px;
    }

    .footer-col:not(.footer-brand) {
        padding-top: 6px;
    }

    .footer-col h5 {
        margin-bottom: 10px;
        font-size: 13px;
        letter-spacing: 0;
        text-transform: none;
    }

    .footer-col:not(.footer-brand) {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
        min-width: 0;
    }

    .footer-col:not(.footer-brand) h5 {
        grid-column: 1 / -1;
    }

    .footer-col a {
        min-width: 0;
        min-height: 26px;
        display: flex;
        align-items: center;
        padding: 2px 0;
        background: transparent;
        border: 0;
        color: rgba(226,231,250,.78);
        font-size: 13px;
        line-height: 1.25;
    }

    .footer-col a:hover {
        color: var(--accent-light);
    }

    .footer-col:last-child {
        grid-template-columns: 1fr;
    }

    .footer-col:last-child a {
        min-height: 28px;
        overflow-wrap: anywhere;
    }

    .footer-bottom {
        padding-top: 16px;
        font-size: 12px;
    }
}

/* 2026-07-08 手机端细节收敛：下载入口、分支卡、学业导航、部门列表 */
@media (max-width: 560px) {
    /* 应用数学 / 纯数学分支：手机端统一为固定小卡片网格 */
    .branch-grid--applied,
    .branch-grid--pure {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 12px;
        overflow: visible;
        padding: 0;
        margin: 0;
        width: 100%;
        max-width: calc(100vw - 36px);
    }

    .branch-grid--applied .branch-card,
    .branch-grid--pure .pure-card {
        width: 100%;
        max-width: calc(100vw - 36px);
        min-height: 132px;
        height: 132px;
        padding: 14px;
        border-radius: 20px;
        background:
            linear-gradient(145deg, rgba(255,255,255,.98), rgba(247,248,255,.94)),
            radial-gradient(circle at 100% 0, rgba(206,87,193,.10), transparent 46%);
        border: 0;
        box-shadow: 0 12px 28px rgba(13, 19, 74, 0.07);
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        justify-content: space-between;
        text-align: left;
    }

    .branch-grid--applied .branch-card:active,
    .branch-grid--pure .pure-card:active {
        transform: scale(.98);
    }

    .branch-grid--applied .branch-icon,
    .branch-grid--pure .sub-icon-large {
        width: 44px;
        height: 44px;
        border-radius: 14px;
        font-size: 21px;
        margin: 0;
    }

    .branch-grid--applied .branch-name,
    .branch-grid--pure .branch-name {
        max-width: calc(100% - 20px);
        font-size: 17px;
        line-height: 1.15;
        margin: 6px 0 0;
        white-space: normal;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .branch-grid--applied .branch-name::after {
        content: none;
    }

    .branch-grid--applied .branch-en,
    .branch-grid--applied .branch-desc,
    .branch-grid--applied .branch-topics,
    .branch-grid--pure .branch-en,
    .branch-grid--pure .branch-desc {
        display: none;
    }

    .branch-grid--applied .branch-enter,
    .branch-grid--pure .branch-enter {
        display: inline-flex;
        margin: 0;
        font-size: 12px;
        line-height: 1;
    }

    .branch-grid--applied .branch-card::after {
        top: 9px;
        right: 10px;
        font-size: 38px;
    }

}

/* 2026-07-10 首页首屏：静态数学黑板 */
.home-page {
    font-family: var(--font-ui);
}

.skip-link {
    position: fixed;
    top: 8px;
    left: 16px;
    z-index: 1100;
    padding: 10px 14px;
    border-radius: 8px;
    background: #f7f5fb;
    color: #171025;
    font-weight: 700;
    transform: translateY(-140%);
    transition: transform 0.2s ease;
}

.skip-link:focus {
    transform: translateY(0);
    outline: 3px solid #bca8e4;
    outline-offset: 2px;
}

.home-page .nav-container {
    padding-top: 12px;
    padding-bottom: 12px;
}

.hero {
    position: relative;
    display: block;
    min-height: 86vh;
    padding: 0;
    overflow: clip;
    isolation: isolate;
    text-align: left;
    color: #f7f5fb;
    background: linear-gradient(135deg, #010544 0%, #0a0f52 52%, #1e3374 100%);
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 56px), 0 100%);
}

.hero::before,
.hero::after {
    content: none;
}

.hero-stage {
    position: relative;
    min-height: 86vh;
    display: grid;
    align-items: center;
    overflow: hidden;
}

/* 与子页统一:低透明公式纹理(不再是整块照片黑板) */
.hero-blackboard {
    position: absolute;
    inset: 0;
    z-index: 0;
    background: url('../images/hero-math-blackboard-v1.webp') center / cover no-repeat;
    opacity: 0.15;
    filter: grayscale(1) brightness(1.7) contrast(1.02);
    transform: scale(1.04);
}

/* 深蓝渐变压底,保证前景文字对比 */
.hero-vignette {
    position: absolute;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    background: linear-gradient(100deg, rgba(0, 3, 47, 0.80) 0%, rgba(1, 5, 68, 0.50) 52%, rgba(18, 34, 88, 0.36) 100%);
}

.home-page .hero-content {
    position: relative;
    z-index: 3;
    width: min(1180px, calc(100% - 48px));
    max-width: none;
    margin: 0 auto;
    padding: 96px 0 58px;
}

.home-page .hero-lockup {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    margin: 28px 0 0;
}

.home-page .hero-lockup-logo {
    width: 36px;
    height: 36px;
    object-fit: contain;
    border-radius: 8px;
    filter: drop-shadow(0 6px 14px rgba(0, 0, 0, 0.28));
}

.home-page .hero-lockup-divider {
    width: 1px;
    height: 26px;
    background: rgba(247, 245, 251, 0.28);
}

.home-page .hero-lockup-motto {
    font-family: var(--font-heading);
    font-size: 17px;
    line-height: 1.5;
    color: rgba(247, 245, 251, 0.9);
}

.home-page .hero-title {
    max-width: 820px;
    margin: 0;
    color: #f8f7fb;
    font-family: var(--font-heading);
    font-size: clamp(52px, 7.5vw, 104px);
    font-weight: 600;
    line-height: 0.98;
    letter-spacing: -0.02em;
    text-wrap: balance;
    text-shadow: 0 12px 42px rgba(0, 0, 0, 0.42);
}

@media (max-width: 760px) {
    .hero-blackboard {
        background-position: 58% center;
        background-attachment: scroll;
    }

    .home-page .hero-content {
        width: 100%;
        padding: 108px 20px 56px;
    }

    .home-page .hero-title {
        max-width: 100%;
        font-size: clamp(54px, 18vw, 78px);
        line-height: 0.94;
    }

    .home-page .hero-lockup {
        gap: 12px;
        margin-top: 24px;
    }

    .home-page .hero-lockup-motto {
        font-size: 15px;
    }

    .hero {
        clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), 0 100%);
    }
    .home-page .hero {
        min-height: 72vh;
    }
    .sub-hero {
        min-height: 300px;
        /* 左右内边距与 .container(18px) 一致，保证手机端 hero 与正文同一条左缘线 */
        padding: 104px 18px 40px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .hero { min-height: 100dvh; }
}

/* 物理页与首页共用同一张静态数学黑板背景 */
.physics-blackboard-hero {
    isolation: isolate;
    overflow: hidden;
    background-image:
        linear-gradient(90deg, rgba(10, 8, 16, 0.83) 0%, rgba(10, 8, 16, 0.63) 38%, rgba(10, 8, 16, 0.18) 72%, rgba(10, 8, 16, 0.35) 100%),
        linear-gradient(180deg, rgba(1, 5, 68, 0.18), rgba(4, 3, 8, 0.28)),
        url('../images/hero-math-blackboard-v1.webp');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.physics-blackboard-hero .hero-bg {
    display: none;
}

@media (max-width: 760px) {
    .physics-blackboard-hero {
        background-position: 58% center;
        background-attachment: scroll;
    }
}

/* 2026-07-11 页脚社交图标改为线稿风格(Tabler 线性图标 + 小红书线稿字标)，扁平描边圆角徽标(小红书是横向字标，用胶囊形不用正圆，避免裁切) */
.social-links a img {
    width: auto;
    height: 15px;
}

/* 首页板块节奏：收紧，避免相邻 section 的上下留白叠加过大 */
.home-page .section {
    padding-block: 60px;
}

.home-page .section-header {
    margin-bottom: 34px;
}

/* 灰色"学习带"（资料与导航 + 持续学习）内部再靠拢，形成一组 */
.home-page #downloads {
    padding-bottom: 40px;
}

.home-page #extension {
    padding-top: 40px;
}

@media (max-width: 560px) {
    .home-page .section {
        padding-block: 48px;
    }

    .home-page .section-header {
        margin-bottom: 30px;
    }

    .home-page #downloads {
        padding-bottom: 32px;
    }

    .home-page #extension {
        padding-top: 32px;
    }
}

/* ============================================
   管理后台 · 统一基础设计语言
   ============================================ */
.admin-page {
    --admin-canvas: #f4f6fb;
    --admin-surface: #ffffff;
    --admin-surface-soft: #f8f9fd;
    --admin-line: #dfe3ef;
    --admin-navy: #010544;
    --admin-accent: #ce57c1;
    margin: 0;
    color: #252a40;
    background: var(--admin-canvas);
    font-family: var(--font-ui);
}

.admin-page .admin-gate {
    position: relative;
    isolation: isolate;
    background:
        linear-gradient(100deg, rgba(1,5,68,.94), rgba(10,15,82,.88)),
        url('../images/hero-math-blackboard-v1.webp') center / cover;
}
.admin-page .admin-gate::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: -1;
    background: radial-gradient(circle at 72% 22%, rgba(206,87,193,.14), transparent 32%);
}
.admin-page .admin-gate-card {
    padding: 36px;
    text-align: left;
    border: 1px solid rgba(255,255,255,.38);
    border-radius: 14px;
    background: rgba(255,255,255,.97);
    box-shadow: 0 24px 70px rgba(0,2,43,.28);
}
.admin-page .admin-gate-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 32px;
    color: var(--admin-navy);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .02em;
}
.admin-page .admin-gate-brand img { width: 28px; height: 28px; object-fit: contain; }
.admin-page .admin-gate-icon {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    margin: 0 0 18px;
    border: 1px solid rgba(206,87,193,.28);
    border-radius: 12px;
    color: var(--admin-accent);
    background: rgba(206,87,193,.08);
    font-size: 25px;
}
.admin-page .admin-gate-card h2 {
    margin-bottom: 8px;
    font-family: var(--font-heading);
    font-size: 27px;
    letter-spacing: -.02em;
}
.admin-page .admin-gate-card > p { margin-bottom: 24px; }
.admin-page .admin-gate-hint { margin: 14px 0 16px !important; }
.admin-page .admin-gate-back { color: var(--admin-navy); font-weight: 600; }

.admin-page .admin-app { background: var(--admin-canvas); }
.admin-page .admin-topbar {
    height: 64px;
    padding: 0 26px;
    background: var(--admin-navy);
    border-bottom: 1px solid rgba(255,255,255,.1);
    box-shadow: none;
}
.admin-page .admin-topbar .logo { gap: 12px; }
.admin-page .admin-topbar .logo-img { width: 34px; height: 34px; }
.admin-page .admin-topbar .logo-title { font-size: 15px; font-weight: 600; letter-spacing: .01em; }
.admin-page .admin-topbar-right { gap: 12px; }
.admin-page .admin-service-status {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 6px 9px;
    border: 1px solid rgba(255,255,255,.15);
    border-radius: 6px;
    color: rgba(255,255,255,.72);
    background: transparent;
    font: inherit;
    font-size: 11px;
    cursor: pointer;
}
.admin-page .admin-service-dot { width: 7px; height: 7px; border-radius: 50%; background: #aab0c2; }
.admin-page .admin-service-status.is-checking .admin-service-dot { background: #e5b85c; animation: pulse 1s ease-in-out infinite; }
.admin-page .admin-service-status.is-online .admin-service-dot { background: #52c889; box-shadow: 0 0 0 3px rgba(82,200,137,.13); }
.admin-page .admin-service-status.is-offline .admin-service-dot { background: #ef7180; box-shadow: 0 0 0 3px rgba(239,113,128,.13); }
.admin-page #adminUser {
    padding-right: 14px;
    border-right: 1px solid rgba(255,255,255,.18);
    color: rgba(255,255,255,.78);
    font-size: 13px;
}
.admin-page .admin-topbar .btn-ghost {
    color: #fff;
    border-color: rgba(255,255,255,.24);
    background: transparent;
}
.admin-page .admin-topbar .btn-ghost:hover { background: rgba(255,255,255,.1); }

.admin-page .admin-body { align-items: flex-start; }
.admin-page .admin-sidebar {
    position: sticky;
    top: 64px;
    width: 244px;
    height: calc(100vh - 64px);
    padding: 20px 14px 24px;
    overflow-y: auto;
    background: var(--admin-surface);
    border-color: var(--admin-line);
    scrollbar-width: thin;
}
.admin-page .admin-nav-label {
    position: relative;
    display: flex;
    align-items: center;
    min-height: 28px;
    margin: 5px 0 8px;
    padding: 5px 12px 5px 15px;
    color: var(--admin-navy);
    background: #f7f5fa;
    font-family: var(--font-heading);
    font-size: 16px !important;
    line-height: 1.2;
    font-weight: 600;
    letter-spacing: .01em;
}
.admin-page .admin-nav-label::before {
    content: '';
    position: absolute;
    left: 0;
    top: 7px;
    bottom: 7px;
    width: 3px;
    border-radius: 2px;
    background: var(--admin-accent);
}
.admin-page .admin-nav-label:first-child { margin-top: 2px; }
.admin-page .admin-nav-groups,
.admin-page .admin-nav-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.admin-page .admin-nav-groups { width: 100%; }
.admin-page .admin-nav-group {
    margin: 0 0 13px;
    padding: 0 0 12px;
    border-bottom: 1px solid #edf0f6;
}
.admin-page .admin-nav-group + .admin-nav-group { margin-top: 2px; }
.admin-page .admin-nav-group:last-child { margin-bottom: 0; border-bottom: 0; }
.admin-page .admin-nav-group.has-active .admin-nav-label { color: var(--admin-navy); }
.admin-page .admin-nav {
    position: relative;
    display: flex;
    align-items: center;
    gap: 11px;
    width: 100%;
    padding: 10px 12px;
    border-radius: 0;
    color: #555c73;
    font-size: 12px;
    font-weight: 500;
    transition: color .18s ease, background-color .18s ease;
}
@media (min-width: 901px) {
    .admin-page .admin-nav-groups > .admin-nav { padding-left: 15px; }
}
.admin-page .admin-nav-group .admin-nav { width: calc(100% - 10px); margin-left: 10px; }
.admin-page .admin-nav i { width: 18px; color: #7b8299; font-size: 18px; text-align: center; }
.admin-page .admin-nav:hover { color: var(--admin-navy); }
.admin-page .admin-nav.active {
    color: var(--admin-navy);
    background: #fff;
    box-shadow: inset 0 -3px 0 var(--admin-accent);
    font-family: var(--font-heading);
    font-weight: 600;
}
.admin-page .admin-nav.active i { color: var(--admin-accent); }
.admin-page .admin-sidebar-divider { border-color: var(--admin-line); }
.admin-page .admin-nav-link { color: #666d83; }

.admin-page .admin-content {
    min-width: 0;
    padding: 34px clamp(24px, 3vw, 48px) 56px;
}
.admin-page .admin-mod { max-width: 1560px; margin: 0 auto; }
.admin-page .admin-mod-header {
    min-height: 48px;
    margin-bottom: 22px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--admin-line);
}
.admin-page .admin-mod-header h2 {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--admin-navy);
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 600;
    letter-spacing: -.015em;
}
.admin-page .admin-mod-header h2 i { color: var(--admin-accent); font-family: 'tabler-icons'; font-size: 21px; }
.admin-page .admin-mod-subtitle { margin-top: 7px; color: #71788f; }

.admin-page .admin-content-workspace {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 28px;
    margin-bottom: 28px;
    padding: 0 0 14px;
    border-bottom: 1px solid var(--admin-line);
}
.admin-page .admin-content-workspace-copy {
    display: grid;
    grid-template-columns: auto auto;
    align-items: baseline;
    gap: 2px 10px;
    flex: 0 0 auto;
}
.admin-page .admin-content-workspace-copy span {
    grid-column: 1 / -1;
    color: #8c93a8;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: .12em;
}
.admin-page .admin-content-workspace-copy strong {
    color: var(--admin-navy);
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 600;
}
.admin-page .admin-content-workspace-copy small { color: #858ca0; font-size: 12px; }
.admin-page .admin-content-workspace-tabs {
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 0;
    overflow-x: auto;
}
.admin-page .admin-content-workspace-tabs button {
    position: relative;
    flex: 0 0 auto;
    padding: 9px 12px 10px;
    border: 0;
    border-radius: 0;
    color: #6f768c;
    background: transparent;
    font-size: 13px;
    font-weight: 600;
}
.admin-page .admin-content-workspace-tabs button:hover { color: var(--admin-navy); }
.admin-page .admin-content-workspace-tabs button.active {
    color: var(--admin-navy);
    background: #f5f6fa;
    box-shadow: inset 0 -2px 0 var(--admin-accent);
}
.admin-page .admin-mod--taxonomy > .admin-content-workspace,
.admin-page .admin-mod--taxonomy > .admin-tabs,
.admin-page .admin-mod--taxonomy > .admin-module-toolbar { display: none !important; }

.admin-page .admin-tabs {
    gap: 22px;
    margin-bottom: 18px;
    border-bottom: 1px solid var(--admin-line);
}
.admin-page .admin-tab {
    position: relative;
    padding: 9px 1px 11px;
    border: 0;
    border-radius: 0;
    color: #70778e;
    background: transparent;
    font-weight: 600;
}
.admin-page .admin-tab:hover { color: var(--admin-navy); }
.admin-page .admin-tab.active {
    color: var(--admin-navy);
    border: 0;
    background: transparent;
}
.admin-page .admin-tab.active::after {
    content: '';
    position: absolute;
    right: 0;
    bottom: -1px;
    left: 0;
    height: 2px;
    background: var(--admin-accent);
}
.admin-page .admin-tab-sep { width: 1px; height: 20px; margin: 7px -4px 0; background: var(--admin-line); }

.admin-page .admin-input {
    min-height: 42px;
    padding: 10px 12px;
    border: 1px solid #cfd4e3;
    border-radius: 7px;
    color: #252a40;
    background: #fff;
    transition: border-color .18s ease, box-shadow .18s ease;
}
.admin-page .admin-input:hover { border-color: #aeb5ca; }
.admin-page .admin-input:focus {
    outline: none;
    border-color: var(--admin-accent);
    box-shadow: 0 0 0 3px rgba(206,87,193,.12);
}
.admin-page .admin-field label,
.admin-page .admin-inline-field label { color: #555c73; font-weight: 600; }
.admin-page .btn { border-radius: 7px; box-shadow: none; }
.admin-page .btn-primary { background: var(--admin-navy); border-color: var(--admin-navy); }
.admin-page .btn-primary:hover { background: #11175c; border-color: #11175c; transform: translateY(-1px); }
.admin-page .btn-ghost { background: #fff; border-color: #d5d9e6; color: var(--admin-navy); }
.admin-page .btn-ghost:hover { border-color: #aeb5ca; background: #f7f8fc; }
.admin-page .btn-danger {
    color: #fff;
    border-color: #b42335;
    background: #b42335;
}
.admin-page .btn-danger:hover { border-color: #981b2c; background: #981b2c; transform: translateY(-1px); }
.admin-page .btn.is-busy { position: relative; padding-left: 34px; cursor: wait; opacity: .72; }
.admin-page .btn.is-busy::before {
    content: '';
    position: absolute;
    left: 13px;
    top: 50%;
    width: 12px;
    height: 12px;
    margin-top: -7px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: admin-spin .7s linear infinite;
}
@keyframes admin-spin { to { transform: rotate(360deg); } }

.admin-page .admin-table-wrap {
    border: 1px solid var(--admin-line);
    border-radius: 10px;
    background: var(--admin-surface);
}
.admin-page .admin-table {
    border-radius: 10px;
    box-shadow: none;
    font-size: 13px;
}
.admin-page .admin-table th {
    padding: 12px 14px;
    color: #626980;
    background: #f5f6fa;
    border-bottom: 1px solid var(--admin-line);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .04em;
}
.admin-page .admin-table td { padding: 13px 14px; border-color: #e7e9f1; vertical-align: middle; }
.admin-page .admin-table tr:hover td { background: #fafaff; }
.admin-page .admin-empty { border: 1px solid var(--admin-line); border-radius: 10px; box-shadow: none; }

/* 消息中心：文字、状态与操作统一为轻量线性语言，避免大面积色块。 */
.admin-page [data-amod="messages"] .admin-tabs,
.admin-page [data-amod="messages"] .admin-table,
.admin-page [data-amod="messages"] .admin-notice-filters,
.admin-page [data-amod="messages"] .admin-content-bulkbar,
.admin-page [data-amod="messages"] .admin-row-actions {
    font-family: var(--font-ui);
}
.admin-page [data-amod="messages"] .msg-pane > .admin-mod-header {
    min-height: 42px;
    margin-bottom: 12px;
    padding: 0;
    border-bottom: 0;
}
.admin-page [data-amod="messages"] .admin-notice-filters {
    display: flex;
    align-items: center;
    gap: 20px;
    min-height: 43px;
    padding: 0 14px;
    border-bottom: 1px solid var(--admin-line);
    white-space: nowrap;
}
.admin-page [data-amod="messages"] .admin-notice-filters-label {
    color: #8b91a3;
    font-size: 11px;
    font-weight: 600;
}
.admin-page [data-amod="messages"] .admin-notice-filter {
    position: relative;
    align-self: stretch;
    padding: 0 1px;
    border: 0;
    color: #6d7489;
    background: transparent;
    font: inherit;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: color .18s ease;
}
.admin-page [data-amod="messages"] .admin-notice-filter small {
    margin-left: 3px;
    color: #a0a6b6;
    font-size: 10px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}
.admin-page [data-amod="messages"] .admin-notice-filter:hover,
.admin-page [data-amod="messages"] .admin-notice-filter.active { color: var(--admin-navy); }
.admin-page [data-amod="messages"] .admin-notice-filter.active::after {
    content: '';
    position: absolute;
    right: 0;
    bottom: -1px;
    left: 0;
    height: 2px;
    background: var(--admin-accent);
}
.admin-page [data-amod="messages"] .admin-notice-filter:focus-visible,
.admin-page [data-amod="messages"] .admin-notice-action:focus-visible,
.admin-page [data-amod="messages"] .admin-notice-command:focus-visible {
    outline: 2px solid rgba(206,87,193,.46);
    outline-offset: 2px;
}
.admin-page [data-amod="messages"] .admin-content-bulkbar {
    border-width: 0 0 1px;
    border-style: solid;
    border-radius: 0;
    background: transparent;
}
.admin-page [data-amod="messages"] .admin-content-bulkbar--active {
    border-color: var(--admin-line);
    background: transparent;
    box-shadow: none;
}
.admin-page [data-amod="messages"] .admin-content-bulkbar--idle { border-color: var(--admin-line); }
.admin-page [data-amod="messages"] .admin-content-bulkbar--idle .admin-user-bulk-left strong,
.admin-page [data-amod="messages"] .admin-content-bulkbar--idle .admin-user-bulk-left span,
.admin-page [data-amod="messages"] .admin-bulk-selection {
    font-size: 12px;
    font-weight: 500;
}
.admin-page [data-amod="messages"] .admin-bulk-selection-count {
    display: inline;
    min-width: 0;
    height: auto;
    padding: 0;
    color: var(--admin-navy);
    background: transparent;
    font-size: 15px;
    font-weight: 700;
}
.admin-page [data-amod="messages"] .admin-notice-command,
.admin-page [data-amod="messages"] .admin-notice-action {
    border: 1px solid #d5d9e6;
    border-radius: 5px;
    color: #555c73;
    background: transparent;
    box-shadow: none;
    font-family: inherit;
    font-size: 11px;
    font-weight: 600;
    transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}
.admin-page [data-amod="messages"] .admin-notice-command { min-height: 31px; padding: 5px 10px; }
.admin-page [data-amod="messages"] .admin-notice-command small {
    margin-left: 3px;
    color: #979daf;
    font-size: 10px;
    font-variant-numeric: tabular-nums;
}
.admin-page [data-amod="messages"] .admin-notice-action { min-height: 29px; padding: 4px 8px; }
.admin-page [data-amod="messages"] .admin-notice-command:hover,
.admin-page [data-amod="messages"] .admin-notice-action:hover {
    border-color: #9ea5ba;
    color: var(--admin-navy);
    background: #fafaff;
    transform: none;
}
.admin-page [data-amod="messages"] .admin-notice-command--primary,
.admin-page [data-amod="messages"] .admin-notice-action--primary {
    border-color: #aeb4c9;
    color: var(--admin-navy);
    background: transparent;
}
.admin-page [data-amod="messages"] .admin-notice-command--danger,
.admin-page [data-amod="messages"] .admin-notice-action--danger { color: #a74451; }
.admin-page [data-amod="messages"] .admin-notice-command--danger:hover,
.admin-page [data-amod="messages"] .admin-notice-action--danger:hover {
    border-color: #d7aeb4;
    color: #922f3d;
    background: #fffafb;
}
.admin-page [data-amod="messages"] .admin-notice-priority,
.admin-page [data-amod="messages"] .admin-notice-state {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #555c70;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
}
.admin-page [data-amod="messages"] .admin-notice-priority i,
.admin-page [data-amod="messages"] .admin-notice-state::before {
    content: '';
    width: 6px;
    height: 6px;
    flex: 0 0 auto;
    border-radius: 50%;
    background: #a8adbc;
}
.admin-page [data-amod="messages"] .admin-notice-priority.is-important i { background: #b88a3d; }
.admin-page [data-amod="messages"] .admin-notice-priority.is-urgent i { background: #bc6570; }
.admin-page [data-amod="messages"] .admin-notice-state.is-published::before { background: #379879; }
.admin-page [data-amod="messages"] .admin-notice-state.is-draft::before { background: #b88a3d; }
.admin-page [data-amod="messages"] .admin-notice-state.is-archived::before { background: #8e94a6; }
.admin-page [data-amod="messages"] .admin-notice-grade,
.admin-page [data-amod="messages"] .admin-notice-attachment,
.admin-page [data-amod="messages"] .admin-notice-empty {
    color: #676e83;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
}
.admin-page [data-amod="messages"] .admin-notice-attachment {
    color: var(--admin-navy);
    font-variant-numeric: tabular-nums;
}
.admin-page [data-amod="messages"] .admin-notice-empty { color: #a2a7b7; }
.admin-page [data-amod="messages"] .admin-notice-date {
    color: #555c73;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

/* 管理员登录与在线状态 */
.admin-page .admin-presence-overview {
    margin-bottom: 18px;
    border: 1px solid var(--admin-line);
    border-radius: 10px;
    background: linear-gradient(112deg, #fbfbff 0%, #fff 60%, #fff8fe 100%);
    overflow: hidden;
}
.admin-page .admin-presence-intro {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 16px;
    padding: 17px 18px 15px;
    border-bottom: 1px solid var(--admin-line);
}
.admin-page .admin-presence-intro h3 {
    margin: 3px 0 0;
    color: var(--admin-navy);
    font-family: var(--font-heading);
    font-size: 19px;
    font-weight: 600;
}
.admin-page .admin-presence-intro > p { margin: 0; color: #777e93; font-size: 12px; }
.admin-page .admin-presence-eyebrow {
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 0;
    color: #73798e;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .06em;
}
.admin-page .admin-live-dot,
.admin-page .admin-person-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #b9bfce;
    flex: 0 0 auto;
}
.admin-page .admin-live-dot { background: #12a879; box-shadow: 0 0 0 3px rgba(18,168,121,.12); }
.admin-page .admin-presence-stats { display: grid; grid-template-columns: 1fr 1fr 1fr 1.45fr; }
.admin-page .admin-presence-stat { min-height: 89px; padding: 14px 18px; border-right: 1px solid var(--admin-line); display: flex; flex-direction: column; justify-content: center; gap: 2px; }
.admin-page .admin-presence-stat:last-child { border-right: 0; }
.admin-page .admin-presence-stat-label { color: #747b90; font-size: 11px; font-weight: 700; letter-spacing: .04em; }
.admin-page .admin-presence-stat strong { color: var(--admin-navy); font-family: var(--font-heading); font-size: 25px; font-weight: 600; line-height: 1; }
.admin-page .admin-presence-stat strong small { color: #7d8499; font-family: inherit; font-size: 13px; font-weight: 500; }
.admin-page .admin-presence-stat > span:last-child { color: #858ca0; font-size: 11px; }
.admin-page .admin-presence-stat-online strong { color: #078b63; }
.admin-page .admin-presence-login-name { overflow: hidden; max-width: 150px; text-overflow: ellipsis; white-space: nowrap; font-size: 18px !important; }
.admin-page .admin-presence-person { display: flex; align-items: center; gap: 9px; min-width: 170px; }
.admin-page .admin-person-dot.is-online { background: #12a879; box-shadow: 0 0 0 3px rgba(18,168,121,.12); }
.admin-page .admin-presence-person strong { display: inline-block; color: #30364c; font-size: 13px; }
.admin-page .admin-presence-account { display: block; margin-top: 2px; color: #8b91a3; font-size: 11px; }
.admin-page .admin-presence-state,
.admin-page .admin-time-cell { display: flex; flex-direction: column; align-items: flex-start; gap: 4px; white-space: nowrap; }
.admin-page .admin-presence-state small,
.admin-page .admin-time-cell span { color: #858ca0; font-size: 11px; }
.admin-page .admin-presence-offline { color: #747b90; font-size: 12px; font-weight: 700; }
.admin-page .admin-time-cell strong { color: #4c5369; font-size: 12px; font-weight: 600; }
.admin-page .admin-presence-footnote { margin-top: 11px; }

/* 复用线上成员管理的统计卡片与表格，仅补管理员会话所需的轻量标识。 */
.admin-page .admin-admin-status-stats { grid-template-columns: repeat(4, minmax(150px, 1fr)); }
.admin-page .admin-admin-latest-login { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.admin-page .admin-admin-presence-dot { display: inline-block; width: 7px; height: 7px; margin: 0 7px 1px 0; border-radius: 50%; background: #b9bfce; }
.admin-page .admin-admin-presence-dot.is-online { background: #12a879; box-shadow: 0 0 0 3px rgba(18,168,121,.12); }
.admin-page .admin-admin-time-meta { display: block; margin-top: 4px; white-space: nowrap; }
.admin-page .admin-admin-status-note { margin-top: 12px; }
.admin-page .admin-user-stat,
.admin-page .admin-notification-card {
    border-color: var(--admin-line);
    border-radius: 9px;
    box-shadow: none;
}
.admin-page .admin-user-bulkbar,
.admin-page .admin-notification-send-note {
    border-color: var(--admin-line);
    border-radius: 8px;
    background: #f7f8fc;
}

/* 成员档案：筛选状态 */
.admin-page .admin-active-filters {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 7px;
    min-height: 27px;
    margin: -3px 0 12px;
    color: #7d8498;
    font-size: 12px;
}
.admin-page .admin-filter-chip,
.admin-page .admin-filter-clear {
    border: 0;
    background: transparent;
    color: #555c73;
    font: inherit;
    cursor: pointer;
}
.admin-page .admin-filter-chip {
    padding: 4px 7px;
    border: 1px solid #ddd9e8;
    border-radius: 4px;
    background: #faf9fc;
}
.admin-page .admin-filter-chip:hover { border-color: #bda9ca; background: #f5f0f7; }
.admin-page .admin-filter-chip i { margin-left: 4px; color: #9a6a95; font-size: 15px; font-style: normal; line-height: 0; }
.admin-page .admin-filter-clear { padding: 4px 2px; color: #8c6288; text-decoration: underline; text-underline-offset: 2px; }
.admin-page .admin-filter-shortcut { color: #9298aa; }

/* 成员档案：面向千人规模的查询、批量与分页工作台。 */
.admin-page [data-amod="users"] .admin-user-stats {
    display: flex;
    align-items: stretch;
    gap: 0;
    margin: 0 0 14px;
    border-block: 1px solid var(--admin-line);
}
.admin-page [data-amod="users"] .admin-user-metric {
    position: relative;
    display: grid;
    min-width: 116px;
    padding: 11px 20px 12px;
    border: 0;
    border-right: 1px solid var(--admin-line);
    text-align: left;
    color: #737a90;
    background: transparent;
    font: inherit;
    cursor: pointer;
    transition: color .18s ease, background-color .18s ease;
}
.admin-page [data-amod="users"] .admin-user-metric:hover { color: var(--admin-navy); background: rgba(255,255,255,.56); }
.admin-page [data-amod="users"] .admin-user-metric.active { color: var(--admin-navy); }
.admin-page [data-amod="users"] .admin-user-metric.active::after {
    content: '';
    position: absolute;
    right: 18px;
    bottom: -1px;
    left: 18px;
    height: 2px;
    background: var(--admin-accent);
}
.admin-page [data-amod="users"] .admin-user-metric span { font-size: 11px; font-weight: 600; }
.admin-page [data-amod="users"] .admin-user-metric strong {
    margin-top: 3px;
    color: inherit;
    font-size: 21px;
    font-weight: 600;
    line-height: 1;
    font-variant-numeric: tabular-nums;
}
.admin-page [data-amod="users"] .admin-user-grade-summary {
    position: relative;
    align-self: center;
    margin-left: auto;
}
.admin-page [data-amod="users"] .admin-user-grade-summary summary {
    padding: 8px 2px 8px 16px;
    color: #626980;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
}
.admin-page [data-amod="users"] .admin-user-grade-summary[open] summary { color: var(--admin-navy); }
.admin-page [data-amod="users"] .admin-user-grade-summary > div {
    position: absolute;
    top: calc(100% + 7px);
    right: 0;
    z-index: 10;
    display: grid;
    grid-template-columns: repeat(2, minmax(110px, 1fr));
    gap: 0;
    width: 270px;
    padding: 7px;
    border: 1px solid var(--admin-line);
    border-radius: 7px;
    background: #fff;
    box-shadow: 0 14px 34px rgba(1,5,68,.12);
}
.admin-page [data-amod="users"] .admin-user-grade-summary > div span {
    display: flex;
    justify-content: space-between;
    padding: 7px 8px;
    color: #697086;
    font-size: 11px;
}
.admin-page [data-amod="users"] .admin-user-grade-summary > div strong { color: var(--admin-navy); font-variant-numeric: tabular-nums; }

.admin-page [data-amod="users"] .admin-member-toolbar {
    display: grid;
    grid-template-columns: minmax(280px, 1.8fr) repeat(3, minmax(135px, .8fr)) auto;
    gap: 8px;
    margin-bottom: 7px;
}
.admin-page [data-amod="users"] .admin-member-search { position: relative; }
.admin-page [data-amod="users"] .admin-member-search .admin-input { width: 100%; padding-right: 104px; }
.admin-page [data-amod="users"] .admin-member-search > span {
    position: absolute;
    top: 50%;
    right: 12px;
    color: #9aa0b1;
    font-size: 10px;
    transform: translateY(-50%);
    pointer-events: none;
}
.admin-page [data-amod="users"] .admin-member-reset {
    min-height: 42px;
    padding-inline: 12px;
    border: 1px solid #d5d9e6;
    color: #656c81;
    background: transparent;
    font-size: 11px;
    font-weight: 600;
}
.admin-page [data-amod="users"] .admin-member-reset:hover { color: var(--admin-navy); border-color: #aeb5ca; background: #fafaff; }

.admin-page [data-amod="users"] .admin-member-bulkbar {
    min-height: 54px;
    margin: 0;
    padding: 9px 13px;
    border-width: 1px 1px 0;
    border-style: solid;
    border-color: var(--admin-line);
    border-radius: 8px 8px 0 0;
    background: transparent;
}
.admin-page [data-amod="users"] .admin-member-bulkbar:empty { display: none; }
.admin-page [data-amod="users"] .admin-member-bulkbar .admin-user-bulk-left {
    display: flex;
    align-items: baseline;
    gap: 7px;
    font-size: 12px;
}
.admin-page [data-amod="users"] .admin-member-bulkbar .admin-user-bulk-left > strong { color: var(--admin-navy); }
.admin-page [data-amod="users"] .admin-member-bulkbar .admin-user-bulk-left > span { color: #858ca0; font-size: 11px; }
.admin-page [data-amod="users"] .admin-member-selection > strong { font-size: 16px; font-variant-numeric: tabular-nums; }
.admin-page [data-amod="users"] .admin-member-selection > button {
    padding: 2px 0;
    border: 0;
    color: #777e92;
    background: transparent;
    font-size: 11px;
    text-decoration: underline;
    text-underline-offset: 3px;
}
.admin-page [data-amod="users"] .admin-member-bulk-actions { display: flex; align-items: center; gap: 7px; }
.admin-page [data-amod="users"] .admin-member-bulk-actions .admin-input { min-width: 150px; min-height: 32px; padding: 5px 9px; font-size: 11px; }
.admin-page [data-amod="users"] .admin-member-bulk-impact {
    max-width: 150px;
    overflow: hidden;
    color: #81889c;
    font-size: 10px;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.admin-page [data-amod="users"] .admin-member-bulk-impact.is-risk { color: #9b3f4b; font-weight: 600; }
.admin-page [data-amod="users"] .admin-member-command,
.admin-page [data-amod="users"] .admin-member-action {
    border: 1px solid #d5d9e6;
    border-radius: 5px;
    color: #555c73;
    background: transparent;
    box-shadow: none;
    font-family: inherit;
    font-size: 11px;
    font-weight: 600;
    transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}
.admin-page [data-amod="users"] .admin-member-command { min-height: 31px; padding: 5px 10px; }
.admin-page [data-amod="users"] .admin-member-command small { margin-left: 3px; color: #969caf; font-size: 10px; font-variant-numeric: tabular-nums; }
.admin-page [data-amod="users"] .admin-member-action { min-height: 29px; padding: 4px 8px; }
.admin-page [data-amod="users"] .admin-member-command:hover,
.admin-page [data-amod="users"] .admin-member-action:hover { color: var(--admin-navy); border-color: #9ea5ba; background: #fafaff; transform: none; }
.admin-page [data-amod="users"] .admin-member-command--primary,
.admin-page [data-amod="users"] .admin-member-action--primary { color: var(--admin-navy); border-color: #aeb4c9; }
.admin-page [data-amod="users"] .admin-member-action--danger { color: #a74451; }
.admin-page [data-amod="users"] .admin-member-action--danger:hover { color: #922f3d; border-color: #d7aeb4; background: #fffafb; }
.admin-page [data-amod="users"] .admin-member-command:disabled { opacity: .42; cursor: not-allowed; }
.admin-page [data-amod="users"] .admin-member-command:focus-visible,
.admin-page [data-amod="users"] .admin-member-action:focus-visible,
.admin-page [data-amod="users"] .admin-user-metric:focus-visible,
.admin-page [data-amod="users"] .admin-member-page-number:focus-visible,
.admin-page [data-amod="users"] .admin-member-page-arrow:focus-visible { outline: 2px solid rgba(206,87,193,.46); outline-offset: 2px; }

.admin-page [data-amod="users"] #usersTable { border-radius: 0 0 8px 8px; transition: opacity .16s ease; }
.admin-page [data-amod="users"] #usersTable.is-loading { opacity: .55; pointer-events: none; }
.admin-page [data-amod="users"] .admin-member-resultsbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 44px;
    padding: 6px 13px;
    border-bottom: 1px solid var(--admin-line);
    color: #777e92;
    font-size: 11px;
}
.admin-page [data-amod="users"] .admin-member-resultsbar > div strong { color: var(--admin-navy); font-size: 13px; font-variant-numeric: tabular-nums; }
.admin-page [data-amod="users"] .admin-member-results-tools { display: flex; align-items: center; gap: 14px; }
.admin-page [data-amod="users"] .admin-member-table-nav { display: flex; align-items: center; gap: 3px; }
.admin-page [data-amod="users"] .admin-member-table-nav button {
    width: 27px;
    height: 27px;
    border: 1px solid transparent;
    border-radius: 4px;
    color: #656c81;
    background: transparent;
    font: inherit;
    font-size: 15px;
    cursor: pointer;
}
.admin-page [data-amod="users"] .admin-member-table-nav button:hover { color: var(--admin-navy); border-color: #d5d9e6; background: #fff; }
.admin-page [data-amod="users"] .admin-member-table-nav button:disabled { opacity: .34; cursor: not-allowed; }
.admin-page [data-amod="users"] .admin-member-table-nav span { min-width: 38px; text-align: center; color: #757c91; font-size: 10px; font-variant-numeric: tabular-nums; }
.admin-page [data-amod="users"] .admin-member-resultsbar label { display: flex; align-items: center; gap: 7px; }
.admin-page [data-amod="users"] .admin-member-resultsbar .admin-input { min-height: 31px; width: auto; padding: 5px 28px 5px 9px; font-size: 11px; }
.admin-page [data-amod="users"] .admin-users-table { border-radius: 0; }
.admin-page [data-amod="users"] .admin-users-table td > strong { font-variant-numeric: tabular-nums; }
.admin-page [data-amod="users"] .admin-member-state {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #5f667b;
    font-size: 11px;
    font-weight: 500;
    white-space: nowrap;
}
.admin-page [data-amod="users"] .admin-member-state::before {
    content: '';
    width: 6px;
    height: 6px;
    flex: 0 0 auto;
    border-radius: 50%;
    background: #a2a8b8;
}
.admin-page [data-amod="users"] .admin-member-state.is-active::before,
.admin-page [data-amod="users"] .admin-member-state.is-verified::before { background: #379879; }
.admin-page [data-amod="users"] .admin-member-state.is-unverified::before { background: #b88a3d; }
.admin-page [data-amod="users"] .admin-member-state.is-disabled::before { background: #bc6570; }
.admin-page [data-amod="users"] .admin-member-state.is-deleted::before { background: #8e94a6; }
.admin-page [data-amod="users"] .admin-member-date { color: #6e7589; font-size: 11px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.admin-page [data-amod="users"] .admin-member-empty {
    display: grid;
    justify-items: start;
    gap: 5px;
    padding: 30px 18px 34px;
    color: #858ca0;
}
.admin-page [data-amod="users"] .admin-member-empty strong { color: #555c73; font-size: 13px; }
.admin-page [data-amod="users"] .admin-member-empty span { font-size: 11px; }
.admin-page [data-amod="users"] .admin-member-empty .btn { margin-top: 8px; }
.admin-page [data-amod="users"] .admin-member-loading { display: grid; gap: 10px; padding: 18px; }
.admin-page [data-amod="users"] .admin-member-loading i { height: 38px; background: linear-gradient(90deg,#eef0f5,#fafbfc,#eef0f5); background-size: 200% 100%; animation: shimmer 1.4s linear infinite; }

.admin-page [data-amod="users"] .admin-user-pagination {
    display: grid;
    grid-template-columns: minmax(140px, 1fr) auto auto auto;
    align-items: center;
    gap: 12px;
    margin-top: 12px;
}
.admin-page [data-amod="users"] .admin-member-pager-summary { color: #777e92; font-size: 11px; }
.admin-page [data-amod="users"] .admin-member-pager-summary strong { color: var(--admin-navy); font-variant-numeric: tabular-nums; }
.admin-page [data-amod="users"] .admin-member-page-controls { display: flex; align-items: center; gap: 3px; }
.admin-page [data-amod="users"] .admin-member-page-number,
.admin-page [data-amod="users"] .admin-member-page-arrow {
    min-width: 30px;
    height: 30px;
    padding: 0 7px;
    border: 1px solid transparent;
    border-radius: 4px;
    color: #656c81;
    background: transparent;
    font: inherit;
    font-size: 11px;
    font-variant-numeric: tabular-nums;
    cursor: pointer;
}
.admin-page [data-amod="users"] .admin-member-page-number:hover,
.admin-page [data-amod="users"] .admin-member-page-arrow:hover { color: var(--admin-navy); border-color: #d5d9e6; background: #fff; }
.admin-page [data-amod="users"] .admin-member-page-number.active { color: var(--admin-navy); border-color: #aeb4c9; background: #fff; font-weight: 700; }
.admin-page [data-amod="users"] .admin-member-page-arrow:disabled { opacity: .38; cursor: not-allowed; }
.admin-page [data-amod="users"] .admin-member-page-gap { min-width: 20px; text-align: center; color: #a0a6b6; }
.admin-page [data-amod="users"] .admin-member-page-jump { display: flex; align-items: center; gap: 5px; color: #7b8295; font-size: 11px; white-space: nowrap; }
.admin-page [data-amod="users"] .admin-member-page-jump .admin-input { width: 54px; min-height: 31px; padding: 5px 7px; text-align: center; font-size: 11px; }
.admin-page [data-amod="users"] .admin-user-pagination .admin-page-size { min-width: 96px; min-height: 31px; padding: 5px 26px 5px 8px; font-size: 11px; }

@media (max-width: 1180px) {
    .admin-page [data-amod="users"] .admin-member-toolbar { grid-template-columns: minmax(260px, 1.5fr) repeat(2, minmax(135px, 1fr)); }
    .admin-page [data-amod="users"] .admin-user-stats { flex-wrap: wrap; }
    .admin-page [data-amod="users"] .admin-user-grade-summary { margin-left: 12px; }
}
@media (max-width: 760px) {
    .admin-page [data-amod="users"] .admin-member-toolbar { grid-template-columns: 1fr 1fr; }
    .admin-page [data-amod="users"] .admin-member-search { grid-column: 1 / -1; }
    .admin-page [data-amod="users"] .admin-user-metric { flex: 1 1 33%; min-width: 100px; padding-inline: 12px; }
    .admin-page [data-amod="users"] .admin-user-grade-summary { width: 100%; margin: 0; padding: 0 12px; }
    .admin-page [data-amod="users"] .admin-user-grade-summary > div { right: 12px; }
    .admin-page [data-amod="users"] .admin-member-bulkbar { align-items: flex-start; }
    .admin-page [data-amod="users"] .admin-member-bulk-actions { width: 100%; flex-wrap: wrap; }
    .admin-page [data-amod="users"] .admin-user-pagination { grid-template-columns: 1fr auto; }
    .admin-page [data-amod="users"] .admin-member-page-controls { grid-row: 2; grid-column: 1 / -1; justify-content: center; }
}

.admin-page .admin-modal-overlay {
    background: rgba(1,5,68,.58);
    backdrop-filter: blur(6px);
}
.admin-page .admin-modal {
    border: 1px solid rgba(255,255,255,.55);
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 24px 80px rgba(0,2,43,.3);
}
.admin-page .admin-modal h3 {
    padding-bottom: 14px;
    border-bottom: 1px solid var(--admin-line);
    color: var(--admin-navy);
    font-family: var(--font-heading);
    font-size: 22px;
}
.admin-page .admin-modal-close {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    top: 18px;
    right: 20px;
    border-radius: 7px;
    font-size: 22px;
}
.admin-page .admin-modal-close:hover { color: var(--admin-navy); background: #f1f2f7; }
.admin-page .admin-confirm-overlay { z-index: 2100; }
.admin-page .admin-confirm {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 16px;
    width: min(460px, 100%);
    padding: 24px;
    border: 1px solid rgba(255,255,255,.55);
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 24px 80px rgba(0,2,43,.32);
}
.admin-page .admin-confirm-icon {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    border-radius: 10px;
    color: #b42335;
    background: #fff0f1;
    font-size: 24px;
}
.admin-page .admin-confirm-copy h3 {
    margin: 1px 0 8px;
    color: var(--admin-navy);
    font-family: var(--font-heading);
    font-size: 20px;
}
.admin-page .admin-confirm-copy p {
    margin: 0;
    color: #626980;
    font-size: 13px;
    line-height: 1.65;
    white-space: pre-line;
}
.admin-page .admin-confirm-actions {
    display: flex;
    grid-column: 1 / -1;
    justify-content: flex-end;
    gap: 10px;
    padding-top: 4px;
}
.admin-page .admin-state {
    display: flex;
    align-items: center;
    gap: 14px;
    min-height: 96px;
    padding: 20px;
    border: 1px solid var(--admin-line);
    border-radius: 9px;
    background: #fff;
}
.admin-page .admin-state-icon {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    flex: 0 0 auto;
    border-radius: 9px;
    color: #b42335;
    background: #fff0f1;
    font-size: 21px;
}
.admin-page .admin-state-copy { min-width: 0; margin-right: auto; }
.admin-page .admin-state-copy strong { display: block; color: var(--admin-navy); font-size: 14px; }
.admin-page .admin-state-copy p { margin: 4px 0 0; color: #71788f; font-size: 12px; line-height: 1.55; }
.admin-page .admin-state--empty .admin-state-icon { color: #777e95; background: #f1f2f7; }
.admin-page .admin-dashboard { display: grid; gap: 18px; }
.admin-page .admin-dashboard-warning {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 11px 13px;
    border: 1px solid #eadcae;
    border-radius: 8px;
    color: #725d1f;
    background: #fffaf0;
    font-size: 12px;
}
.admin-page .admin-dashboard-stats {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}
.admin-page .admin-dashboard-stat {
    display: grid;
    grid-template-columns: 42px minmax(0, 1fr) 18px;
    gap: 12px;
    align-items: center;
    min-height: 112px;
    padding: 18px;
    border: 1px solid var(--admin-line);
    border-radius: 10px;
    text-align: left;
    color: inherit;
    background: #fff;
    cursor: pointer;
    transition: border-color .18s ease, transform .18s ease;
}
.admin-page .admin-dashboard-stat:hover { border-color: #b8bfd3; transform: translateY(-2px); }
.admin-page .admin-dashboard-stat-icon {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 9px;
    color: var(--admin-accent);
    background: rgba(206,87,193,.08);
    font-size: 20px;
}
.admin-page .admin-dashboard-stat-copy { display: flex; min-width: 0; flex-direction: column; }
.admin-page .admin-dashboard-stat-copy small { color: #7a8197; font-size: 11px; font-weight: 600; }
.admin-page .admin-dashboard-stat-copy strong { margin: 5px 0 4px; color: var(--admin-navy); font-size: 25px; font-variant-numeric: tabular-nums; font-family: var(--font-heading); font-weight: 600; }
.admin-page .admin-dashboard-stat-copy em { overflow: hidden; color: #8a90a3; font-size: 10px; font-style: normal; text-overflow: ellipsis; white-space: nowrap; }
.admin-page .admin-dashboard-stat-arrow { color: #a3a9ba; }
.admin-page .admin-dashboard-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 14px; }
.admin-page .admin-dashboard-panel,
.admin-page .admin-dashboard-actions {
    border: 1px solid var(--admin-line);
    border-radius: 10px;
    background: #fff;
}
.admin-page .admin-dashboard-panel-head,
.admin-page .admin-dashboard-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 17px 18px;
}
.admin-page .admin-dashboard-panel-head { border-bottom: 1px solid var(--admin-line); }
.admin-page .admin-dashboard-panel-head span,
.admin-page .admin-dashboard-actions > div:first-child span {
    color: #9a6a95;
    font-size: 9px;
    font-weight: 700;
    letter-spacing: .13em;
    text-transform: uppercase;
}
.admin-page .admin-dashboard-panel-head h3,
.admin-page .admin-dashboard-actions h3 { margin: 3px 0 0; color: var(--admin-navy); font-family: var(--font-heading); font-size: 18px; }
.admin-page .admin-dashboard-panel-head button {
    border: 0;
    color: var(--admin-navy);
    background: transparent;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
}
.admin-page .admin-dashboard-list { display: grid; }
.admin-page .admin-dashboard-row {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) 16px;
    gap: 11px;
    align-items: center;
    padding: 13px 18px;
    border: 0;
    border-bottom: 1px solid #eceef4;
    text-align: left;
    color: inherit;
    background: transparent;
    cursor: pointer;
}
.admin-page .admin-dashboard-row:last-child { border-bottom: 0; }
.admin-page .admin-dashboard-row:hover { background: #fafaff; }
.admin-page .admin-dashboard-row-type { padding: 3px 6px; border-radius: 4px; color: #7d3575; background: #f8eaf6; font-size: 9px; font-weight: 700; }
.admin-page .admin-dashboard-row-type--order { color: #785f1f; background: #fff5d9; }
.admin-page .admin-dashboard-row-main { display: flex; min-width: 0; flex-direction: column; gap: 3px; }
.admin-page .admin-dashboard-row-main strong { overflow: hidden; color: #34394e; font-size: 12px; text-overflow: ellipsis; white-space: nowrap; }
.admin-page .admin-dashboard-row-main small { color: #9298aa; font-size: 10px; }
.admin-page .admin-dashboard-row > i { color: #a7acbc; }
.admin-page .admin-dashboard-empty { padding: 32px 18px; color: #9197a9; font-size: 12px; text-align: center; }
.admin-page .admin-dashboard-actions { padding-block: 16px; }
.admin-page .admin-dashboard-action-list { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px; }
.admin-page .admin-dashboard-action-list button {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 10px;
    border: 1px solid var(--admin-line);
    border-radius: 7px;
    color: var(--admin-navy);
    background: #fff;
    font: inherit;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
}
.admin-page .admin-dashboard-action-list button:hover { border-color: #b8bfd3; background: #f8f9fc; }
.admin-page .admin-dashboard-skeleton { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.admin-page .admin-dashboard-skeleton i { height: 112px; border-radius: 10px; background: linear-gradient(90deg, #eef0f5, #f8f9fb, #eef0f5); background-size: 200% 100%; animation: shimmer 1.4s linear infinite; }
.admin-page .admin-dashboard-skeleton--wide { grid-template-columns: 1.15fr .85fr; }
.admin-page .admin-dashboard-skeleton--wide i { height: 280px; }
@keyframes shimmer { to { background-position: -200% 0; } }
.admin-page .points-grant-card {
    border: 1px solid var(--admin-line);
    background: #fff;
    box-shadow: none;
}

@media (max-width: 900px) {
    .admin-page .admin-sidebar {
        /* 横向导航必须留在文档流内，避免窄屏时遮住内容区标题。 */
        position: relative;
        top: auto;
        z-index: auto;
        width: 100%;
        height: auto;
        padding: 9px 12px;
    }
    .admin-page .admin-nav-label { display: none; }
    .admin-page .admin-nav-groups { width: max-content; flex-direction: row; gap: 0; }
    .admin-page .admin-nav-group {
        display: flex;
        flex-direction: row;
        gap: 8px;
        margin: 0;
        padding: 0 10px 0 0;
        border-bottom: 0;
    }
    .admin-page .admin-nav-group + .admin-nav-group {
        margin: 0 0 0 10px;
        padding-left: 10px;
        border-left: 1px solid var(--admin-line);
    }
    .admin-page .admin-nav,
    .admin-page .admin-nav-group .admin-nav { width: auto; margin-left: 0; border: 0; border-radius: 0; }
    .admin-page .admin-nav.active { box-shadow: inset 0 -2px 0 var(--admin-accent); }
    .admin-page .admin-content { padding: 22px 16px 42px; }
    .admin-page .admin-content-workspace { align-items: stretch; flex-direction: column; gap: 12px; margin-bottom: 22px; }
    .admin-page .admin-content-workspace-tabs { width: 100%; }
    .admin-page .admin-bulk-actions { width: 100%; flex-wrap: wrap; }
    .admin-page .admin-mod-header h2 { font-size: 21px; }
    .admin-page .admin-dashboard-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .admin-page .admin-dashboard-grid { grid-template-columns: 1fr; }
    .admin-page .admin-dashboard-skeleton { grid-template-columns: repeat(2, 1fr); }
    .admin-page .admin-dashboard-skeleton--wide { grid-template-columns: 1fr; }
    .admin-page .admin-table-wrap { position: relative; }
    .admin-page .admin-table th:last-child,
    .admin-page .admin-table td:last-child {
        position: sticky;
        right: 0;
        background: #fff;
        box-shadow: -8px 0 14px rgba(1,5,68,.05);
    }
    .admin-page .admin-table th:last-child { background: #f5f6fa; }

    .admin-page .admin-presence-intro { align-items: flex-start; flex-direction: column; }
    .admin-page .admin-presence-stats { grid-template-columns: 1fr 1fr; }
    .admin-page .admin-presence-stat { min-height: 82px; padding: 13px 14px; border-bottom: 1px solid var(--admin-line); }
    .admin-page .admin-presence-stat:nth-child(2) { border-right: 0; }
    .admin-page .admin-presence-stat:nth-child(3),
    .admin-page .admin-presence-stat:nth-child(4) { border-bottom: 0; }
    .admin-page .admin-presence-stat:nth-child(3) { border-right: 1px solid var(--admin-line); }
}

@media (max-width: 560px) {
    .admin-page .admin-gate-card { padding: 28px 24px; }
    .admin-page .admin-topbar { padding-inline: 14px; }
    .admin-page .admin-topbar .logo-title { font-size: 13px; }
    .admin-page #adminUser { display: none; }
    .admin-page .admin-service-status span:last-child { display: none; }
    .admin-page .admin-dashboard-stats { grid-template-columns: 1fr; }
    .admin-page .admin-dashboard-actions { align-items: flex-start; flex-direction: column; }
    .admin-page .admin-dashboard-action-list { justify-content: flex-start; }
}

/* ===== 成员认证凭证：绑定账号、一次核销、可追溯 ===== */
.admin-page .invite-credential-view {
    border-top: 1px solid var(--admin-line);
}
.admin-page .invite-credential-rules {
    display: flex;
    align-items: center;
    gap: 24px;
    min-height: 54px;
    color: var(--text-secondary);
    font-size: 13px;
    border-bottom: 1px solid var(--admin-line);
}
.admin-page .invite-credential-rules span {
    display: inline-flex;
    gap: 6px;
    align-items: baseline;
    white-space: nowrap;
}
.admin-page .invite-credential-rules strong {
    color: var(--admin-navy);
    font-weight:600;
}
.admin-page .invite-credential-rules span + span::before {
    content: '';
    width: 1px;
    height: 14px;
    margin-right: 18px;
    background: var(--admin-line);
}
.admin-page .invite-credential-filters {
    display: flex;
    align-items: flex-end;
    gap: 24px;
    min-height: 58px;
    overflow-x: auto;
    border-bottom: 1px solid var(--admin-line);
}
.admin-page .invite-filter {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    min-height: 58px;
    padding: 0;
    color: var(--text-secondary);
    font: inherit;
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    background: transparent;
    border: 0;
    cursor: pointer;
}
.admin-page .invite-filter::after {
    content: '';
    position: absolute;
    right: 0;
    bottom: -1px;
    left: 0;
    height: 2px;
    background: transparent;
}
.admin-page .invite-filter span {
    color: var(--text-muted);
    font-size: 12px;
    font-variant-numeric: tabular-nums;
}
.admin-page .invite-filter:hover,
.admin-page .invite-filter.is-active { color: var(--admin-navy); }
.admin-page .invite-filter.is-active::after { background: var(--admin-accent); }
.admin-page .invite-credential-table {
    margin-top: 18px;
    border: 1px solid var(--admin-line);
    border-radius: 10px;
}
.admin-page .invite-table { min-width: 920px; }
.admin-page .invite-table th,
.admin-page .invite-table td { vertical-align: middle; }
.admin-page .invite-recipient strong,
.admin-page .invite-table td > small,
.admin-page .invite-note,
.admin-page .invite-date {
    display: block;
}
.admin-page .invite-recipient strong { color: var(--admin-navy); font-weight:600; }
.admin-page .invite-table small {
    margin-top: 4px;
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 400;
    line-height: 1.4;
}
.admin-page .invite-code {
    color: var(--admin-navy);
    font-family: KaTeX, ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .09em;
    white-space: nowrap;
    background: transparent;
}
.admin-page .invite-date { color: var(--text-primary); font-variant-numeric: tabular-nums; white-space: nowrap; }
.admin-page .invite-status {
    display: inline-block;
    padding: 3px 0;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight:600;
    border-bottom: 1px solid currentColor;
    white-space: nowrap;
}
.admin-page .invite-status--pending { color: #086f58; }
.admin-page .invite-status--expired,
.admin-page .invite-status--disabled,
.admin-page .invite-status--legacy { color: var(--text-muted); }
.admin-page .invite-status--used { color: var(--admin-navy); }
.admin-page .invite-legacy-label { display: block; color: var(--text-secondary); }
.admin-page .invite-muted { color: var(--text-muted); font-size: 12px; }
.admin-page .invite-actions { min-width: 170px; }
.admin-page .invite-credential-table .admin-empty {
    min-height: 180px;
    display: grid;
    place-content: center;
    gap: 6px;
    background: transparent;
}
.admin-page .invite-credential-table .admin-empty p { margin: 0; font-size: 13px; }

.admin-page .invite-issue-form { display: grid; gap: 20px; margin-bottom: 20px; }
.admin-page .invite-member-picker { position: relative; }
.admin-page .invite-member-results {
    max-height: 250px;
    overflow-y: auto;
    border: 1px solid var(--admin-line);
    border-top: 0;
}
.admin-page .invite-member-results:empty { display: none; }
.admin-page .invite-member-results > p {
    margin: 0;
    padding: 13px 14px;
    color: var(--text-muted);
    font-size: 13px;
}
.admin-page .invite-member-option {
    display: grid;
    grid-template-columns: minmax(120px, .8fr) minmax(120px, .7fr) minmax(200px, 1.4fr);
    gap: 14px;
    width: 100%;
    padding: 12px 14px;
    color: var(--text-primary);
    text-align: left;
    background: #fff;
    border: 0;
    border-bottom: 1px solid var(--admin-line);
    cursor: pointer;
}
.admin-page .invite-member-option:last-child { border-bottom: 0; }
.admin-page .invite-member-option:hover { background: #f7f8fb; }
.admin-page .invite-member-option strong { color: var(--admin-navy); font-weight:600; }
.admin-page .invite-member-option span,
.admin-page .invite-member-option small { color: var(--text-secondary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.admin-page .invite-selected-member,
.admin-page .invite-edit-recipient {
    display: flex;
    align-items: center;
    gap: 14px;
    min-height: 58px;
    padding: 10px 0;
    border-bottom: 1px solid var(--admin-line);
}
.admin-page .invite-selected-member[hidden] { display: none; }
.admin-page .invite-selected-member > div { display: grid; gap: 2px; min-width: 0; }
.admin-page .invite-selected-member strong,
.admin-page .invite-edit-recipient strong { color: var(--admin-navy); font-weight:600; }
.admin-page .invite-selected-member span,
.admin-page .invite-edit-recipient span,
.admin-page .invite-edit-recipient small { color: var(--text-secondary); font-size: 12px; }
.admin-page .invite-selected-member button,
.admin-page .invite-expiry-shortcuts button {
    padding: 2px 0;
    color: var(--text-secondary);
    font: inherit;
    font-size: 12px;
    background: transparent;
    border: 0;
    border-bottom: 1px solid currentColor;
    cursor: pointer;
}
.admin-page .invite-selected-member button { margin-left: auto; }
.admin-page .invite-expiry-shortcuts { display: flex; gap: 14px; margin-top: 8px; }
.admin-page .invite-issue-summary {
    padding-top: 14px;
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.7;
    border-top: 1px solid var(--admin-line);
}
.admin-page .invite-edit-recipient { margin: -4px 0 18px; }
.admin-page .invite-edit-recipient span { margin-right: 8px; }
.admin-page .invite-edit-recipient small { margin-left: auto; }
.admin-page .invite-edit-form { margin-bottom: 20px; }
.admin-page .invite-code-input { font-family: KaTeX, ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .08em; }
.admin-page .admin-field label span { color: var(--text-muted); font-size: 12px; font-weight: 400; }

@media (max-width: 760px) {
    .admin-page .invite-credential-rules { align-items: flex-start; flex-direction: column; gap: 6px; padding: 13px 0; }
    .admin-page .invite-credential-rules span + span::before { display: none; }
    .admin-page .invite-member-option { grid-template-columns: 1fr; gap: 3px; }
    .admin-page .invite-edit-recipient { align-items: flex-start; flex-direction: column; gap: 4px; }
    .admin-page .invite-edit-recipient small { margin-left: 0; }
}

/* ===== 成员管理拆分：轻量名册 + 独立认证队列 ===== */
.admin-page [data-amod="users"] .admin-member-summary {
    display: flex;
    align-items: center;
    gap: 22px;
    min-height: 48px;
    margin-bottom: 14px;
    border-block: 1px solid var(--admin-line);
}
.admin-page [data-amod="users"] .admin-member-summary > button {
    position: relative;
    display: inline-flex;
    align-items: baseline;
    gap: 6px;
    min-height: 48px;
    padding: 0;
    color: #747b90;
    font: inherit;
    font-size: 12px;
    background: transparent;
    border: 0;
    cursor: pointer;
}
.admin-page [data-amod="users"] .admin-member-summary > button strong {
    color: var(--admin-navy);
    font-size: 15px;
    font-variant-numeric: tabular-nums;
}
.admin-page [data-amod="users"] .admin-member-summary > button.is-active::after {
    content: '';
    position: absolute;
    right: 0;
    bottom: -1px;
    left: 0;
    height: 2px;
    background: var(--admin-accent);
}
.admin-page [data-amod="users"] .admin-member-summary .admin-user-grade-summary { margin-left: auto; }

.admin-page [data-amod="verification"] .verification-tabs {
    display: flex;
    gap: 26px;
    min-height: 52px;
    margin-bottom: 16px;
    border-block: 1px solid var(--admin-line);
}
.admin-page [data-amod="verification"] .verification-tabs button {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 0;
    color: #747b90;
    font: inherit;
    font-size: 13px;
    font-weight: 600;
    background: transparent;
    border: 0;
    cursor: pointer;
}
.admin-page [data-amod="verification"] .verification-tabs button::after {
    content: '';
    position: absolute;
    right: 0;
    bottom: -1px;
    left: 0;
    height: 2px;
    background: transparent;
}
.admin-page [data-amod="verification"] .verification-tabs button.is-active { color: var(--admin-navy); }
.admin-page [data-amod="verification"] .verification-tabs button.is-active::after { background: var(--admin-accent); }
.admin-page [data-amod="verification"] .verification-tabs strong {
    color: inherit;
    font-size: 12px;
    font-variant-numeric: tabular-nums;
}
.admin-page [data-amod="verification"] .verification-toolbar {
    display: grid;
    grid-template-columns: minmax(300px, 1fr) minmax(150px, .35fr) auto;
    gap: 8px;
    margin-bottom: 10px;
}
.admin-page [data-amod="verification"] .admin-member-search { position: relative; }
.admin-page [data-amod="verification"] .admin-member-search .admin-input { width: 100%; padding-right: 104px; }
.admin-page [data-amod="verification"] .admin-member-search span {
    position: absolute;
    top: 50%;
    right: 12px;
    color: #9aa0b1;
    font-size: 10px;
    transform: translateY(-50%);
    pointer-events: none;
}
.admin-page [data-amod="verification"] .admin-member-reset {
    min-height: 42px;
    color: #656c81;
    background: transparent;
    border: 1px solid #d5d9e6;
    box-shadow: none;
    font-size: 11px;
}
.admin-page [data-amod="verification"] .verification-bulkbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 54px;
    padding: 9px 13px;
    border: 1px solid var(--admin-line);
    border-bottom: 0;
    border-radius: 8px 8px 0 0;
}
.admin-page [data-amod="verification"] .verification-bulkbar:empty { display: none; }
.admin-page [data-amod="verification"] .verification-bulkbar > div {
    display: flex;
    align-items: baseline;
    gap: 7px;
    color: #858ca0;
    font-size: 11px;
}
.admin-page [data-amod="verification"] .verification-bulkbar > div > strong {
    color: var(--admin-navy);
    font-size: 13px;
    font-variant-numeric: tabular-nums;
}
.admin-page [data-amod="verification"] .verification-selection > strong { font-size: 17px !important; }
.admin-page [data-amod="verification"] .verification-bulkbar button {
    min-height: 31px;
    padding: 5px 10px;
    color: #555c73;
    font: inherit;
    font-size: 11px;
    font-weight: 600;
    background: transparent;
    border: 1px solid #d5d9e6;
    border-radius: 5px;
    cursor: pointer;
}
.admin-page [data-amod="verification"] .verification-selection button {
    min-height: auto;
    padding: 2px 0;
    color: #777e92;
    font-size: 11px;
    font-weight: 400;
    border: 0;
    border-bottom: 1px solid currentColor;
    border-radius: 0;
}
.admin-page [data-amod="verification"] .verification-bulkbar .verification-apply { color: var(--admin-navy); border-color: #aeb4c9; }
.admin-page [data-amod="verification"] .verification-bulkbar .verification-apply.is-risk { color: #9b3f4b; border-color: #d7aeb4; }
.admin-page [data-amod="verification"] .verification-table {
    border: 1px solid var(--admin-line);
    border-radius: 0 0 8px 8px;
    transition: opacity .16s ease;
}
.admin-page [data-amod="verification"] .verification-table.is-loading { opacity: .55; pointer-events: none; }
.admin-page [data-amod="verification"] .verification-results {
    display: flex;
    align-items: baseline;
    min-height: 43px;
    padding: 12px 13px 8px;
    color: #777e92;
    font-size: 11px;
    border-bottom: 1px solid var(--admin-line);
}
.admin-page [data-amod="verification"] .verification-results strong { color: var(--admin-navy); font-size: 13px; font-variant-numeric: tabular-nums; }
.admin-page [data-amod="verification"] .verification-list { min-width: 850px; }
.admin-page [data-amod="verification"] .verification-list td { vertical-align: middle; }
.admin-page [data-amod="verification"] .verification-member,
.admin-page [data-amod="verification"] .verification-record { display: grid; gap: 3px; }
.admin-page [data-amod="verification"] .verification-member strong,
.admin-page [data-amod="verification"] .verification-record strong { color: var(--admin-navy); font-size: 12px; font-weight:600; }
.admin-page [data-amod="verification"] .verification-member span,
.admin-page [data-amod="verification"] .verification-record span { color: #81889c; font-size: 10px; }
.admin-page [data-amod="verification"] .verification-date { color: #6e7589; font-size: 11px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.admin-page [data-amod="verification"] .verification-state {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #786431;
    font-size: 11px;
    white-space: nowrap;
}
.admin-page [data-amod="verification"] .verification-state::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #b88a3d;
}
.admin-page [data-amod="verification"] .verification-actions { min-width: 138px; }
.admin-page [data-amod="verification"] .verification-actions button {
    min-height: 29px;
    padding: 4px 8px;
    color: #555c73;
    font: inherit;
    font-size: 11px;
    font-weight: 600;
    background: transparent;
    border: 1px solid #d5d9e6;
    border-radius: 5px;
    cursor: pointer;
}
.admin-page [data-amod="verification"] .verification-actions button.is-primary { color: var(--admin-navy); border-color: #aeb4c9; }
.admin-page [data-amod="verification"] .verification-actions button.is-risk { color: #9b3f4b; border-color: #d7aeb4; }
.admin-page [data-amod="verification"] .verification-empty {
    display: grid;
    gap: 5px;
    min-height: 180px;
    padding: 32px 18px;
    align-content: center;
    justify-items: start;
    color: #858ca0;
}
.admin-page [data-amod="verification"] .verification-empty strong { color: #555c73; font-size: 13px; }
.admin-page [data-amod="verification"] .verification-empty span { font-size: 11px; }
.admin-page [data-amod="verification"] .verification-loading { display: grid; gap: 10px; padding: 18px; }
.admin-page [data-amod="verification"] .verification-loading i { height: 38px; background: linear-gradient(90deg,#eef0f5,#fafbfc,#eef0f5); background-size: 200% 100%; animation: shimmer 1.4s linear infinite; }
.admin-page [data-amod="verification"] .verification-pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 52px;
    color: #777e92;
    font-size: 11px;
}
.admin-page [data-amod="verification"] .verification-pagination > span strong { color: var(--admin-navy); font-variant-numeric: tabular-nums; }
.admin-page [data-amod="verification"] .verification-pagination > div { display: flex; gap: 3px; align-items: center; }
.admin-page [data-amod="verification"] .verification-pagination button {
    min-width: 30px;
    height: 30px;
    padding: 0 7px;
    color: #656c81;
    font: inherit;
    font-size: 11px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 4px;
    cursor: pointer;
}
.admin-page [data-amod="verification"] .verification-pagination button.is-active { color: var(--admin-navy); border-color: #aeb4c9; background: #fff; font-weight: 700; }
.admin-page [data-amod="verification"] .verification-pagination button:disabled { opacity: .38; cursor: not-allowed; }
.admin-page [data-amod="verification"] .verification-pagination i { width: 20px; text-align: center; color: #a0a6b6; font-style: normal; }

@media (max-width: 760px) {
    .admin-page [data-amod="users"] .admin-member-summary { flex-wrap: wrap; gap: 14px; padding-block: 8px; }
    .admin-page [data-amod="users"] .admin-member-summary .admin-user-grade-summary { width: 100%; margin-left: 0; }
    .admin-page [data-amod="verification"] .verification-toolbar { grid-template-columns: 1fr 1fr; }
    .admin-page [data-amod="verification"] .verification-toolbar .admin-member-search { grid-column: 1 / -1; }
    .admin-page [data-amod="verification"] .verification-bulkbar { align-items: flex-start; gap: 10px; }
}

/* ===== 双色调插画淡入 =====
   图片就绪前由 JS（nav-common.js / main.js）给容器加 .illo-pending 隐藏，
   load 后移除并过渡到各自的设计透明度，避免懒加载解码期间闪出纯色底块。
   无 JS 时类不存在，插画保持常显。置于文件末尾以覆盖各容器自身的 opacity。 */
.dl-illo, .ext-illo, .about-intro-illo, .pf-illo, .notice-home-illo { transition: opacity .5s ease; }
.dl-illo.illo-pending, .ext-illo.illo-pending, .about-intro-illo.illo-pending,
.pf-illo.illo-pending, .notice-home-illo.illo-pending { opacity: 0; }
@media (prefers-reduced-motion: reduce) {
    .dl-illo, .ext-illo, .about-intro-illo, .pf-illo { transition: none; }
}