```css
/* ============================================
   蓝莓视频 - 精品短片放映室
   style.css | 全站样式
   ============================================ */

/* ---------- CSS 变量与主题系统 ---------- */
:root {
    /* 主色板 — 蓝莓深紫 + 明亮蓝调 */
    --primary: #4F46E5;
    --primary-light: #818CF8;
    --primary-dark: #3730A3;
    --accent: #7C3AED;
    --accent-soft: #EDE9FE;
    --blueberry: #312E81;
    --blueberry-light: #4338CA;

    /* 功能色 */
    --success: #059669;
    --warning: #D97706;
    --danger: #DC2626;
    --info: #2563EB;

    /* 中性色 — 亮色模式 */
    --bg-body: #F8FAFC;
    --bg-surface: #FFFFFF;
    --bg-elevated: #FFFFFF;
    --bg-muted: #F1F5F9;
    --text-primary: #0F172A;
    --text-secondary: #334155;
    --text-tertiary: #64748B;
    --text-inverse: #F8FAFC;
    --border-subtle: #E2E8F0;
    --border-default: #CBD5E1;
    --shadow-sm: 0 1px 2px rgba(15,23,42,0.06);
    --shadow-md: 0 4px 6px -1px rgba(15,23,42,0.08), 0 2px 4px -2px rgba(15,23,42,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(15,23,42,0.1), 0 4px 6px -4px rgba(15,23,42,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(15,23,42,0.12), 0 8px 10px -6px rgba(15,23,42,0.08);

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #A855F7 100%);
    --gradient-banner: linear-gradient(145deg, #1E1B4B 0%, #312E81 40%, #4F46E5 100%);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.6) 100%);

    /* 毛玻璃 */
    --glass-bg: rgba(255,255,255,0.72);
    --glass-border: rgba(255,255,255,0.35);
    --glass-shadow: 0 8px 32px rgba(31,38,135,0.15);

    /* 字体 */
    --font-sans: "Inter", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, serif;
    --font-mono: "JetBrains Mono", "Fira Code", "SF Mono", Consolas, monospace;

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-full: 9999px;

    /* 间距 */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    /* 布局 */
    --container-max: 1200px;
    --container-padding: 1.5rem;
    --nav-height: 72px;

    /* 动画 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

/* 暗色模式变量覆盖 — 蓝莓夜航主题 */
[data-theme="dark"] {
    --bg-body: #0B1120;
    --bg-surface: #111827;
    --bg-elevated: #1F2937;
    --bg-muted: #1E293B;
    --text-primary: #F1F5F9;
    --text-secondary: #CBD5E1;
    --text-tertiary: #94A3B8;
    --text-inverse: #0F172A;
    --border-subtle: #334155;
    --border-default: #475569;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.3);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.4);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.5);

    --gradient-card: linear-gradient(145deg, rgba(31,41,55,0.9) 0%, rgba(31,41,55,0.7) 100%);
    --glass-bg: rgba(17,24,39,0.8);
    --glass-border: rgba(148,163,184,0.2);
    --glass-shadow: 0 8px 32px rgba(0,0,0,0.4);

    --primary: #818CF8;
    --primary-light: #A5B4FC;
    --primary-dark: #6366F1;
    --accent: #A78BFA;
    --accent-soft: rgba(139,92,246,0.15);
}

/* ---------- 基础重置 ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-body);
    transition: background-color var(--transition-base), color var(--transition-base);
    overflow-x: hidden;
}

/* ---------- 排版 ---------- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 800;
    line-height: 1.25;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    margin-bottom: 0.75rem;
}

h1 { font-size: clamp(2.5rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.8rem, 3vw, 2.5rem); margin-top: 2.5rem; }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p {
    margin-bottom: 1.25rem;
    color: var(--text-secondary);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast);
    font-weight: 500;
}

a:hover {
    color: var(--primary-dark);
    text-decoration: none;
}

strong { font-weight: 600; color: var(--text-primary); }

/* 列表 */
ul, ol {
    padding-left: 1.25rem;
    margin-bottom: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

/* 代码 */
code, pre {
    font-family: var(--font-mono);
    background: var(--bg-muted);
    border-radius: var(--radius-sm);
    font-size: 0.9em;
}

code { padding: 0.2em 0.4em; }

pre {
    padding: 1rem;
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

pre code { background: transparent; padding: 0; }

/* 引用 */
blockquote {
    border-left: 4px solid var(--primary);
    padding-left: 1.25rem;
    margin: 1.5rem 0;
    font-style: italic;
    color: var(--text-secondary);
}

/* 表格 */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.95rem;
}

th, td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-subtle);
    text-align: left;
}

th {
    background: var(--bg-muted);
    font-weight: 600;
    color: var(--text-primary);
}

tr:hover { background: var(--bg-muted); }

/* ---------- 布局容器 ---------- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section {
    padding: var(--space-16) 0;
}

.section-sm {
    padding: var(--space-8) 0;
}

/* ---------- 导航栏 ---------- */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid var(--border-subtle);
    transition: all var(--transition-base);
    height: var(--nav-height);
    display: flex;
    align-items: center;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
    background: var(--glass-bg);
}

.nav-menu {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    gap: 1rem;
}

.brand {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.brand::before {
    content: "🎬";
    font-size: 1.8rem;
    filter: drop-shadow(0 2px 4px rgba(79,70,229,0.3));
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
    padding: 0.25rem 0;
    transition: color var(--transition-fast);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-base);
    border-radius: 2px;
}

.nav-links a:hover {
    color: var(--text-primary);
}

.nav-links a:hover::after {
    width: 100%;
}

/* 主题切换按钮 */
.btn-theme {
    background: var(--bg-muted);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-size: 1rem;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.btn-theme:hover {
    background: var(--bg-elevated);
    border-color: var(--border-default);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
}

.mobile-menu .btn-theme {
    padding: 0.5rem 0.75rem;
}

/* ---------- 按钮系统 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1;
    transition: all var(--transition-base);
    cursor: pointer;
    border: 1px solid transparent;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 14px rgba(79,70,229,0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(79,70,229,0.45);
    color: white;
}

.btn-secondary {
    background: var(--bg-surface);
    color: var(--text-primary);
    border-color: var(--border-default);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--text-primary);
    color: var(--text-primary);
}

.btn-outline:hover {
    background: var(--text-primary);
    color: var(--bg-body);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background: var(--bg-muted);
    color: var(--text-primary);
}

.btn-sm {
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2.25rem;
    font-size: 1.1rem;
}

.btn-icon {
    padding: 0.75rem;
    border-radius: var(--radius-full);
    width: 2.75rem;
    height: 2.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ---------- Banner 主视觉 ---------- */
.banner {
    position: relative;
    background: var(--gradient-banner);
    padding: clamp(4rem, 8vw, 6rem) 0;
    color: white;
    overflow: hidden;
    isolation: isolate;
}

.banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(167,139,250,0.4) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(99,102,241,0.5) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(236,72,153,0.2) 0%, transparent 70%);
    z-index: -1;
    animation: bannerGlow 8s ease-in-out infinite alternate;
}

@keyframes bannerGlow {
    0% { opacity: 0.6; transform: scale(1); }
    100% { opacity: 1; transform: scale(1.05); }
}

.banner::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(to top, var(--bg-body), transparent);
    z-index: 1;
}

.banner .container {
    position: relative;
    z-index: 2;
}

.banner h1 {
    color: white;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
    animation: fadeInUp 0.8s var(--ease-out-expo) both;
}

.banner p {
    color: rgba(255,255,255,0.9);
    font-size: clamp(1.1rem, 2vw, 1.25rem);
    max-width: 650px;
    margin-bottom: 2rem;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
    animation: fadeInUp 0.8s 0.2s var(--ease-out-expo) both;
}

.banner .btn {
    animation: fadeInUp 0.8s 0.4s var(--ease-out-expo) both;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ---------- 卡片系统 ---------- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.card {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-base);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.card:hover::before {
    transform: scaleX(1);
}

.card h3, .card h4 {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 0;
}

.card .meta {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.card-icon {
    width: 3.5rem;
    height: 3.5rem;
    border-radius: var(--radius-md);
    background: var(--accent-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    transition: transform var(--transition-base);
}

.card:hover .card-icon {
    transform: scale(1.1) rotate(-5deg);
}

/* 服务卡片特殊样式 */
.card-grid .card:nth-child(1) .card-icon { background: rgba(79,70,229,0.1); }
.card-grid .card:nth-child(2) .card-icon { background: rgba(236,72,153,0.1); }
.card-grid .card:nth-child(3) .card-icon { background: rgba(5,150,105,0.1); }
.card-grid .card:nth-child(4) .card-icon { background: rgba(217,119,6,0.1); }

/* ---------- 文章列表 ---------- */
.article-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.article-item {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.article-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.article-item h3 {
    margin-bottom: 0.5rem;
}

.article-item h3 a {
    color: var(--text-primary);
    transition: color var(--transition-fast);
}

.article-item h3 a:hover {
    color: var(--primary);
}

.article-item .summary {
    color: var(--text-tertiary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.article-item .time-badge {
    font-size: 0.8rem;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    background: var(--bg-muted);
    color: var(--text-tertiary);
    font-weight: 500;
}

/* ---------- FAQ ---------- */
.faq-item {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-item:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-md);
}

.faq-question {
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-surface);
    transition: background var(--transition-fast);
    font-size: 1.05rem;
    color: var(--text-primary);
}

.faq-question:hover {
    background: var(--bg-muted);
}

.faq-question::after {
    content: '＋';
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--primary);
    transition: transform var(--transition-base);
    flex-shrink: 0;
    margin-left: 1rem;
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.5rem 1.25rem;
    color: var(--text-secondary);
    line-height: 1.7;
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

/* ---------- HowTo 步骤 ---------- */
.step {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    align-items: flex-start;
    padding: 1.5rem;
    background: var(--bg-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    transition: all var(--transition-base);
}

.step:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.step-num {
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-full);
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.125rem;
    flex-shrink: 0;
    box-shadow: 0 4px 12px rgba(79,70,229,0.3);
}

.step h4 {
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.step p {
    margin-bottom: 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ---------- 时间标签 ---------- */
.time-badge {
    display: inline-block;
    background: var(--bg-muted);
    color: var(--text-tertiary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    padding: 1rem 0;
    margin-bottom: 0;
}

.breadcrumb a {
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

.breadcrumb a:hover {
    color: var(--primary);
}

.breadcrumb .separator {
    margin: 0 0.5rem;
    opacity: 0.5;
}

/* ---------- 页脚 ---------- */
.footer {
    background: var(--bg-elevated);
    border-top: 1px solid var(--border-subtle);
    padding: 4rem 0 2rem;
    margin-top: 4rem;
}

.footer h4 {
    color: var(--text-primary);
    margin-bottom: 1.25rem;
    font-size: 1.125rem;
}

.footer p {
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

.footer ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer li {
    margin-bottom: 0.5rem;
}

.footer a {
    color: var(--text-tertiary);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.footer a:hover {
    color: var(--primary);
    padding-left: 4px;
}

.footer-bottom {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-subtle);
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* ---------- 返回顶部 ---------- */
.scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3rem;
    height: 3rem;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: 0 8px 20px rgba(79,70,229,0.4);
    transition: all var(--transition-base);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(79,70,229,0.5);
}

/* ---------- 动画辅助 ---------- */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s var(--ease-out-expo);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* 悬浮光晕效果 */
.hover-glow {
    position: relative;
    overflow: hidden;
}

.hover-glow::after {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    top: -50%;
    left: -50%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-base);
    pointer-events: none;
}

.hover-glow:hover::after {
    opacity: 1;
}

/* ---------- 响应式设计 ---------- */
@media (max-width: 1024px) {
    .container {
        padding: 0 1.25rem;
    }

    .nav-links {
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    :root {
        --container-padding: 1rem;
        --nav-height: 60px;
    }

    .nav-links {
        display: none;
    }

    .mobile-menu {
        display: block;
    }

    .card-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .banner {
        padding: 3rem 0;
    }

    .banner h1 {
        font-size: 2.25rem;
    }

    .section {
        padding: var(--space-8) 0;
    }

    .footer {
        padding: 3rem 0 1.5rem;
    }

    .footer .container > div {
        flex-direction: column;
        gap: 2rem;
    }

    .step {
        flex-direction: column;
        padding: 1.25rem;
    }

    .step-num {
        margin-bottom: 0.5rem;
    }

    .faq-question {
        font-size: 0.95rem;
        padding: 1rem;
    }

    .faq-answer {
        padding: 0 1rem 1rem;
    }

    .scroll-top {
        bottom: 1rem;
        right: 1rem;
        width: 2.5rem;
        height: 2.5rem;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .btn {
        padding: 0.6rem 1.25rem;
        font-size: 0.875rem;
    }

    .card {
        padding: 1.5rem;
    }

    .banner h1 {
        font-size: 1.75rem;
    }

    .banner p {
        font-size: 1rem;
    }
}

/* ---------- 打印样式 ---------- */
@media print {
    .navbar, .footer, .scroll-top, .btn-theme, .mobile-menu {
        display: none !important;
    }

    body {
        background: white;
        color: black;
        font-size: 12pt;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    .card, .article-item, .faq-item {
        break-inside: avoid;
        border: 1px solid #ccc;
        box-shadow: none;
    }
}

/* ---------- 滚动条美化 ---------- */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-muted);
}

::-webkit-scrollbar-thumb {
    background: var(--border-default);
    border-radius: 4px;
    transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* ---------- 选择颜色 ---------- */
::selection {
    background: var(--primary);
    color: white;
}

/* ---------- 焦点可见性 ---------- */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ---------- 暗色模式适配细节 ---------- */
[data-theme="dark"] .card {
    background: var(--bg-surface);
}

[data-theme="dark"] .navbar {
    background: rgba(17,24,39,0.85);
}

[data-theme="dark"] .article-item h3 a {
    color: var(--text-primary);
}

[data-theme="dark"] .article-item h3 a:hover {
    color: var(--primary-light);
}

[data-theme="dark"] .faq-question {
    background: var(--bg-surface);
}

[data-theme="dark"] .faq-question:hover {
    background: var(--bg-muted);
}

/* ---------- 动效增强 ---------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}
```