```css

/* ===== 被窝影院 · 全站样式 ===== */
/* 全局设计变量 —— 高可读性对比度 */
:root {
    --bg-primary: #F7F9FC;
    --bg-card: #FFFFFF;
    --bg-soft: #EDF1F7;
    --bg-invert: #1A1D29;
    --text-primary: #1F2937;
    --text-secondary: #2D3A4A;
    --text-tertiary: #4B5D6F;
    --text-link: #1D4ED8;
    --text-btn: #FFFFFF;
    --text-heading: #111827;
    --border-light: #D1D9E6;
    --brand-color: #2563EB;
    --brand-dark: #1E3A8A;
    --shadow-sm: 0 4px 12px rgba(0,0,0,0.06);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(255, 255, 255, 0.3);
    --gradient-hero: linear-gradient(145deg, #E8F0FE, #F7F9FC);
    --card-hover-transform: translateY(-6px) scale(1.02);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-primary: #12141A;
    --bg-card: #1E222E;
    --bg-soft: #2A2F3F;
    --bg-invert: #F1F5F9;
    --text-primary: #E2E8F0;
    --text-secondary: #CBD5E1;
    --text-tertiary: #94A3B8;
    --text-link: #7CA8FF;
    --text-btn: #0F1117;
    --text-heading: #F8FAFC;
    --border-light: #3B4254;
    --brand-color: #5B8CFF;
    --brand-dark: #B1C9FF;
    --glass-bg: rgba(30, 34, 46, 0.6);
    --glass-border: rgba(255, 255, 255, 0.1);
    --gradient-hero: linear-gradient(145deg, #1E222E, #12141A);
}

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

html {
    scroll-behavior: smooth;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    transition: background 0.3s ease, color 0.3s ease;
    font-size: 16px;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5 {
    color: var(--text-heading);
    line-height: 1.3;
    font-weight: 700;
    letter-spacing: -0.02em;
}

p {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

a {
    color: var(--text-link);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

a:hover {
    text-decoration: underline;
    color: var(--brand-dark);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

/* ===== 头部导航 ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm);
    transition: background 0.3s ease, backdrop-filter 0.3s ease;
}

.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
    gap: 20px;
}

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--text-heading);
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: -0.03em;
    transition: opacity 0.2s ease;
}

.logo:hover {
    opacity: 0.85;
}

.logo svg {
    width: 40px;
    height: 40px;
    filter: drop-shadow(0 2px 8px rgba(37, 99, 235, 0.2));
}

.menu {
    display: flex;
    gap: 24px;
    align-items: center;
    list-style: none;
}

.menu a {
    color: var(--text-secondary);
    font-weight: 600;
    padding: 8px 4px;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s;
    position: relative;
}

.menu a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--brand-color);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.menu a:hover {
    color: var(--text-link);
    border-bottom-color: transparent;
    text-decoration: none;
}

.menu a:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--bg-soft);
    border-radius: 40px;
    padding: 4px 8px 4px 16px;
    border: 1px solid var(--border-light);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.search-box:focus-within {
    border-color: var(--brand-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-box input {
    border: none;
    background: transparent;
    padding: 8px 4px;
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    width: 180px;
    transition: width 0.3s ease;
}

.search-box input:focus {
    width: 220px;
}

.search-box input::placeholder {
    color: var(--text-tertiary);
}

.search-box button {
    background: var(--brand-color);
    border: none;
    border-radius: 30px;
    padding: 8px 16px;
    color: var(--text-btn);
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
    font-size: 0.9rem;
}

.search-box button:hover {
    background: var(--brand-dark);
    transform: scale(1.05);
}

.theme-toggle {
    background: var(--bg-soft);
    border: 1px solid var(--border-light);
    border-radius: 30px;
    padding: 8px 14px;
    color: var(--text-primary);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.theme-toggle:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: transform 0.2s;
}

.mobile-menu-btn:hover {
    transform: scale(1.1);
}

/* 移动菜单下拉 */
.mobile-nav {
    display: none;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    padding: 12px 24px;
    animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.mobile-nav a {
    display: block;
    padding: 12px 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
    font-weight: 600;
    transition: color 0.2s, padding-left 0.2s;
}

.mobile-nav a:hover {
    color: var(--text-link);
    padding-left: 8px;
    text-decoration: none;
}

@media (max-width: 960px) {
    .menu, .search-box {
        display: none;
    }
    .mobile-menu-btn {
        display: block;
    }
    .mobile-nav.open {
        display: block;
    }
}

@media (max-width: 480px) {
    .nav-wrap {
        padding: 10px 0;
    }
    .logo {
        font-size: 1.4rem;
    }
    .logo svg {
        width: 32px;
        height: 32px;
    }
    .theme-toggle {
        padding: 6px 10px;
        font-size: 0.8rem;
    }
}

/* ===== HERO ===== */
.hero {
    background: var(--gradient-hero);
    border-radius: var(--radius-lg);
    margin-top: 28px;
    padding: 48px 32px;
    display: flex;
    align-items: center;
    gap: 40px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--glass-border);
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    flex: 1.4;
    position: relative;
    z-index: 1;
}

.hero-badge {
    background: linear-gradient(135deg, var(--brand-color), var(--brand-dark));
    color: var(--text-btn);
    padding: 6px 16px;
    border-radius: 40px;
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-block;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

.hero h1 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
    background: linear-gradient(135deg, var(--text-heading), var(--brand-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.8;
}

.hero-visual {
    flex: 1;
    min-width: 260px;
    position: relative;
    z-index: 1;
}

.hero-visual svg {
    width: 100%;
    height: auto;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
}

.hero-visual svg:hover {
    transform: scale(1.02) rotate(1deg);
}

@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        padding: 32px 20px;
        text-align: center;
    }
    .hero h1 {
        font-size: 2rem;
    }
    .hero p {
        font-size: 1rem;
    }
    .hero-visual {
        min-width: 100%;
    }
}

/* ===== 卡片通用 ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    margin: 40px 0;
}

.card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    padding: 24px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease, border-color 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, transparent 0%, rgba(37, 99, 235, 0.05) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover {
    transform: var(--card-hover-transform);
    box-shadow: var(--shadow-md);
    border-color: var(--brand-color);
}

.card:hover::before {
    opacity: 1;
}

.card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.card h4 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    position: relative;
    z-index: 1;
}

.card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    position: relative;
    z-index: 1;
}

/* ===== 区块标题 ===== */
.section-title {
    font-size: 2rem;
    margin: 48px 0 24px;
    position: relative;
    padding-bottom: 12px;
}

.section-title::after {
    content: "";
    display: block;
    width: 70px;
    height: 4px;
    background: linear-gradient(90deg, var(--brand-color), var(--brand-dark));
    margin-top: 8px;
    border-radius: 4px;
    transition: width 0.3s ease;
}

.section-title:hover::after {
    width: 120px;
}

/* ===== 表格 ===== */
.info-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.info-table th, .info-table td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border-light);
    text-align: left;
    transition: background 0.2s ease;
}

.info-table th {
    background: var(--bg-soft);
    color: var(--text-heading);
    font-weight: 700;
}

.info-table td {
    color: var(--text-primary);
}

.info-table tr:hover td {
    background: rgba(37, 99, 235, 0.05);
}

/* ===== FAQ 样式 ===== */
.faq-item {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    border: 1px solid var(--glass-border);
    overflow: hidden;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.faq-item:hover {
    border-color: var(--brand-color);
    box-shadow: var(--shadow-sm);
}

.faq-question {
    padding: 18px 24px;
    font-weight: 700;
    cursor: pointer;
    list-style: none;
    color: var(--text-heading);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.2s ease;
    user-select: none;
}

.faq-question:hover {
    background: rgba(37, 99, 235, 0.05);
}

.faq-question::after {
    content: "＋";
    font-size: 1.6rem;
    color: var(--brand-color);
    font-weight: 400;
    transition: transform 0.3s ease;
}

.faq-item[open] .faq-question::after {
    content: "－";
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}

.faq-answer p {
    margin-bottom: 0.75rem;
}

/* ===== HowTo ===== */
.howto-steps {
    counter-reset: step;
    max-width: 800px;
}

.step-item {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    padding: 20px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    border: 1px solid var(--glass-border);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.step-num {
    counter-increment: step;
    background: linear-gradient(135deg, var(--brand-color), var(--brand-dark));
    color: var(--text-btn);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.step-content h4 {
    margin-bottom: 8px;
    font-size: 1.05rem;
}

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

/* ===== 客户评价 ===== */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
    margin: 30px 0;
}

.testimonial {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 24px;
    border-radius: var(--radius-md);
    border-left: 5px solid var(--brand-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.testimonial:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.testimonial p {
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.8;
}

.testimonial .author {
    margin-top: 16px;
    font-weight: 700;
    color: var(--text-heading);
    font-style: normal;
}

/* ===== 友情链接 ===== */
.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin: 24px 0;
}

.footer-links a {
    color: var(--text-secondary);
    padding: 8px 16px;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 40px;
    border: 1px solid var(--glass-border);
    transition: all 0.2s ease;
}

.footer-links a:hover {
    color: var(--text-link);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
    border-color: var(--brand-color);
}

/* ===== 页脚 ===== */
.site-footer {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    padding: 40px 0 20px;
    margin-top: 60px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
}

.footer-col h4 {
    margin-bottom: 16px;
    color: var(--text-heading);
    font-size: 1.1rem;
}

.footer-col a {
    display: block;
    margin-bottom: 8px;
    color: var(--text-secondary);
    transition: color 0.2s, padding-left 0.2s;
}

.footer-col a:hover {
    color: var(--text-link);
    padding-left: 6px;
    text-decoration: none;
}

.footer-col p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.copyright {
    text-align: center;
    color: var(--text-tertiary);
    margin-top: 40px;
    font-size: 0.9rem;
    border-top: 1px solid var(--border-light);
    padding-top: 20px;
}

.copyright p {
    margin-bottom: 8px;
}

/* ===== 辅助 ===== */
.badge {
    background: var(--bg-soft);
    color: var(--text-primary);
    padding: 4px 12px;
    border-radius: 40px;
    font-size: 0.8rem;
    transition: all 0.2s ease;
}

.btn {
    background: linear-gradient(135deg, var(--brand-color), var(--brand-dark));
    color: var(--text-btn);
    padding: 12px 28px;
    border-radius: 60px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-block;
    font-size: 1rem;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn:hover {
    transform: scale(1.02);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
    text-decoration: none;
    color: var(--text-btn);
}

.btn:active {
    transform: scale(0.98);
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: linear-gradient(135deg, var(--brand-color), var(--brand-dark));
    color: var(--text-btn);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.8rem;
    box-shadow: var(--shadow-md);
    border: none;
    z-index: 999;
    transition: all 0.3s ease;
    opacity: 0.8;
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
    opacity: 1;
}

/* ===== 文章卡片 ===== */
.article-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.article-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    padding: 20px;
    border: 1px solid var(--glass-border);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.article-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: var(--brand-color);
}

.article-card time {
    color: var(--text-tertiary);
    font-size: 0.85rem;
    display: block;
    margin-bottom: 8px;
}

.article-card h4 {
    margin: 10px 0;
    font-size: 1.1rem;
    transition: color 0.2s ease;
}

.article-card:hover h4 {
    color: var(--brand-color);
}

.article-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.article-card a {
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.article-card a:hover {
    color: var(--brand-dark);
    text-decoration: none;
    padding-left: 4px;
}

/* ===== 滚动动画 ===== */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: opacity, transform;
}

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

/* ===== 图片插画 ===== */
.svg-img {
    width: 100%;
    height: auto;
    display: block;
}

/* ===== 确保所有文字对比 ===== */
.text-muted {
    color: var(--text-tertiary);
}

.text-body {
    color: var(--text-primary);
}

.text-heading {
    color: var(--text-heading);
}

/* ===== 响应式优化 ===== */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .section-title {
        font-size: 1.6rem;
        margin: 32px 0 16px;
    }
    
    .card-grid {
        grid-template-columns: 1fr;
        gap: 16px;
        margin: 24px 0;
    }
    
    .testimonial-grid {
        grid-template-columns: 1fr;
    }
    
    .article-list {
        grid-template-columns: 1fr;
    }
    
    .step-item {
        flex-direction: column;
        gap: 12px;
    }
    
    .step-item:hover {
        transform: translateY(-4px);
    }
    
    .info-table {
        font-size: 0.9rem;
    }
    
    .info-table th, .info-table td {
        padding: 10px 12px;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 1.4rem;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 15px;
    }
    
    .hero {
        padding: 24px 16px;
        margin-top: 16px;
    }
    
    .hero h1 {
        font-size: 1.6rem;
    }
    
    .hero p {
        font-size: 0.95rem;
    }
    
    .hero-badge {
        font-size: 0.75rem;
        padding: 4px 12px;
    }
    
    .btn {
        padding: 10px 24px;
        font-size: 0.9rem;
    }
    
    .faq-question {
        padding: 14px 16px;
        font-size: 0.95rem;
    }
    
    .faq-answer {
        padding: 0 16px 16px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}

/* ===== 暗色模式适配 ===== */
[data-theme="dark"] .card,
[data-theme="dark"] .testimonial,
[data-theme="dark"] .article-card,
[data-theme="dark"] .step-item,
[data-theme="dark"] .faq-item,
[data-theme="dark"] .info-table {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* ===== 自定义滚动条 ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--brand-color);
    border-radius: 4px;
    transition: background 0.2s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--brand-dark);
}

/* ===== 焦点可见性 ===== */
:focus-visible {
    outline: 2px solid var(--brand-color);
    outline-offset: 2px;
}

/* ===== 打印样式 ===== */
@media print {
    .site-header,
    .back-to-top,
    .theme-toggle,
    .mobile-menu-btn,
    .search-box,
    .btn {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .hero {
        background: none;
        box-shadow: none;
    }
}

/* ===== 动画性能优化 ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .reveal {
        opacity: 1;
        transform: none;
    }
}

```