```css
/* ===== 人妖视频 - 全站样式表 ===== */
/* 风格：暗黑霓虹 + 玻璃质感 + 柔和圆角 */

/* 核心可读性颜色规范 —— 深色文字优先，层次分明 */
:root {
    --bg-light: #f8fafc;
    --bg-card: #ffffff;
    --bg-deep: #0b1220;
    --text-primary-light: #1f2937;
    --text-secondary-light: #243447;
    --text-heading-light: #111827;
    --border-light: #d1d5db;
    --accent: #2563eb;
    --accent-dark: #1e3a8a;
    --bg-nav-light: #ffffff;
    --footer-bg-light: #1e293b;
    --footer-text-light: #f1f5f9;
    --btn-text-light: #ffffff;
    --code-bg-light: #f1f5f9;
    --glass-bg: rgba(255,255,255,0.7);
    --glass-border: rgba(255,255,255,0.3);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.08);
    --gradient-banner: linear-gradient(135deg, #6d28d9, #4f46e5, #2563eb);
    --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.9), rgba(255,255,255,0.6));
    --gradient-text: linear-gradient(135deg, #f59e0b, #ef4444);
    --gradient-btn: linear-gradient(135deg, #f59e0b, #f97316);
    --blur-amount: 12px;
}

/* 暗色变量 */
[data-theme="dark"] {
    --bg-light: #0b1220;
    --bg-card: #1e293b;
    --bg-deep: #0f172a;
    --text-primary-light: #e2e8f0;
    --text-secondary-light: #cbd5e1;
    --text-heading-light: #f8fafc;
    --border-light: #334155;
    --accent: #60a5fa;
    --accent-dark: #bfdbfe;
    --bg-nav-light: #0f172a;
    --footer-bg-light: #0f172a;
    --footer-text-light: #e2e8f0;
    --btn-text-light: #0f172a;
    --code-bg-light: #1e293b;
    --glass-bg: rgba(30,41,59,0.6);
    --glass-border: rgba(255,255,255,0.1);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.5);
    --gradient-banner: linear-gradient(135deg, #1e1b4b, #312e81, #1e3a8a);
    --gradient-card: linear-gradient(145deg, rgba(30,41,59,0.8), rgba(30,41,59,0.5));
    --gradient-text: linear-gradient(135deg, #fbbf24, #f87171);
    --gradient-btn: linear-gradient(135deg, #fbbf24, #fb923c);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background-color: var(--bg-light);
    color: var(--text-primary-light);
    line-height: 1.7;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-heading-light);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 0.5em;
    letter-spacing: -0.01em;
}

p {
    margin-bottom: 0.75rem;
}

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

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

img, svg {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    color: inherit;
}

input, textarea {
    font-family: inherit;
}

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

main {
    flex: 1;
}

/* ===== 滚动条美化 ===== */
::-webkit-scrollbar {
    width: 10px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 10px;
    border: 2px solid var(--bg-light);
}

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

/* ===== 导航栏 ===== */
.sticky-nav {
    background-color: var(--glass-bg);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.sticky-nav.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    padding: 12px 0;
    gap: 10px;
}

.brand {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 0.5px;
    white-space: nowrap;
    transition: transform 0.3s ease;
}

.brand:hover {
    transform: scale(1.02);
}

.nav-links {
    display: flex;
    gap: 28px;
    flex-wrap: wrap;
    align-items: center;
    list-style: none;
}

.nav-links a {
    color: var(--text-primary-light);
    font-weight: 500;
    position: relative;
    padding: 4px 0;
    transition: color 0.3s;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
    border-radius: 2px;
}

.nav-links a:hover {
    color: var(--accent);
    text-decoration: none;
}

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

.menu-toggle {
    display: none;
    background: none;
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 8px 14px;
    font-size: 1.3rem;
    cursor: pointer;
    color: var(--text-primary-light);
    transition: all 0.3s;
    background: var(--glass-bg);
}

.menu-toggle:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

.search-box {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--glass-bg);
    border-radius: 40px;
    padding: 4px 4px 4px 14px;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(8px);
    transition: all 0.3s;
}

.search-box:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.search-box input {
    padding: 6px 0;
    border: none;
    background: transparent;
    color: var(--text-primary-light);
    font-size: 0.9rem;
    width: 120px;
    outline: none;
    transition: width 0.3s ease;
}

.search-box input:focus {
    width: 160px;
}

.search-box input::placeholder {
    color: var(--text-secondary-light);
    opacity: 0.7;
}

.icon-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text-primary-light);
    padding: 8px;
    border-radius: 50%;
    transition: all 0.3s;
    line-height: 1;
}

.icon-btn:hover {
    background: var(--bg-deep);
    color: var(--bg-light);
    transform: rotate(20deg) scale(1.1);
}

/* ===== 按钮 ===== */
.btn {
    background: var(--gradient-btn);
    color: #fff;
    padding: 12px 28px;
    border-radius: 40px;
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
    text-align: center;
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.3);
    position: relative;
    overflow: hidden;
    font-size: 0.95rem;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover {
    opacity: 0.95;
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 25px rgba(245, 158, 11, 0.4);
    text-decoration: none;
    color: #fff;
}

.btn:hover::before {
    left: 100%;
}

.btn:active {
    transform: translateY(0) scale(0.98);
}

.btn:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

/* ===== Banner ===== */
.banner {
    background: var(--gradient-banner);
    border-radius: 32px;
    padding: 56px 40px;
    margin: 40px 0;
    color: white;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    animation: fadeInUp 0.8s ease-out;
}

.banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255,255,255,0.15), transparent 70%);
    border-radius: 50%;
    animation: pulse 4s ease-in-out infinite;
}

.banner::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(255,255,255,0.1), transparent 70%);
    border-radius: 50%;
    animation: pulse 5s ease-in-out infinite reverse;
}

.banner h2 {
    color: #ffffff;
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 20px rgba(0,0,0,0.2);
}

.banner p {
    color: rgba(255,255,255,0.9);
    font-size: 1.1rem;
    max-width: 700px;
    position: relative;
    z-index: 1;
    text-shadow: 0 1px 10px rgba(0,0,0,0.15);
}

.banner .btn {
    background: #ffffff;
    color: var(--accent-dark);
    margin-top: 20px;
    position: relative;
    z-index: 1;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.banner .btn:hover {
    background: #f0f0f0;
    color: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.25);
}

/* ===== 网格卡片 ===== */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.grid-card {
    background: var(--gradient-card);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 24px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(var(--blur-amount));
    -webkit-backdrop-filter: blur(var(--blur-amount));
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out;
    animation-fill-mode: both;
}

.grid-card:nth-child(1) { animation-delay: 0.1s; }
.grid-card:nth-child(2) { animation-delay: 0.2s; }
.grid-card:nth-child(3) { animation-delay: 0.3s; }
.grid-card:nth-child(4) { animation-delay: 0.4s; }
.grid-card:nth-child(5) { animation-delay: 0.5s; }

.grid-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-text);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.grid-card:hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

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

.grid-card h3 {
    color: var(--text-heading-light);
    margin-bottom: 12px;
    font-size: 1.2rem;
    position: relative;
    padding-bottom: 8px;
}

.grid-card h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--gradient-text);
    border-radius: 3px;
}

.grid-card p, .grid-card li {
    color: var(--text-primary-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

.section-title {
    font-size: 2rem;
    margin: 50px 0 24px;
    border-left: 8px solid var(--accent);
    padding-left: 20px;
    position: relative;
    background: linear-gradient(to right, var(--text-heading-light), var(--text-secondary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.6s ease-out;
}

.badge {
    background: var(--gradient-btn);
    color: white;
    padding: 6px 16px;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-block;
    margin: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: all 0.3s;
}

.badge:hover {
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

/* ===== 文章卡片 ===== */
.article-card {
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 20px 24px;
    margin-bottom: 12px;
    transition: all 0.3s ease;
    background: var(--glass-bg);
    backdrop-filter: blur(8px);
    animation: fadeInUp 0.5s ease-out;
}

.article-card:hover {
    transform: translateX(8px);
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
    background: var(--bg-card);
}

.article-card h4 {
    margin: 0 0 8px;
    font-size: 1.1rem;
    transition: color 0.3s;
}

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

.article-meta {
    font-size: 0.85rem;
    color: var(--text-secondary-light);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.article-meta::before {
    content: '📅';
    font-size: 0.9rem;
}

.article-card p {
    margin-bottom: 8px;
    line-height: 1.6;
}

.read-more {
    font-weight: 600;
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap 0.3s;
}

.read-more:hover {
    gap: 8px;
    text-decoration: none;
}

.read-more::after {
    content: '→';
    transition: transform 0.3s;
}

.read-more:hover::after {
    transform: translateX(4px);
}

/* ===== FAQ ===== */
.faq-item {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 0;
    margin-bottom: 12px;
    overflow: hidden;
    transition: all 0.3s;
    backdrop-filter: blur(8px);
    animation: fadeInUp 0.5s ease-out;
}

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

.faq-question {
    font-weight: 600;
    color: var(--text-heading-light);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 24px;
    transition: all 0.3s;
    user-select: none;
}

.faq-question:hover {
    color: var(--accent);
}

.faq-question span {
    font-size: 1.2rem;
    transition: transform 0.3s;
    color: var(--accent);
    flex-shrink: 0;
    margin-left: 16px;
}

.faq-item.active .faq-question span {
    transform: rotate(180deg);
}

.faq-item.active .faq-question {
    color: var(--accent);
}

.faq-answer {
    padding: 0 24px 18px;
    color: var(--text-primary-light);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* ===== HowTo ===== */
.howto-step {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 28px;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    animation: fadeInUp 0.6s ease-out;
}

.howto-step h4 {
    color: var(--accent);
    font-size: 1.1rem;
    margin: 20px 0 8px;
    padding-bottom: 6px;
    border-bottom: 2px solid var(--accent);
    display: inline-block;
}

.howto-step h4:first-child {
    margin-top: 0;
}

.howto-step ol, .howto-step ul {
    padding-left: 24px;
    margin: 8px 0;
}

.howto-step li {
    margin-bottom: 6px;
    color: var(--text-primary-light);
    line-height: 1.6;
}

.howto-step li::marker {
    color: var(--accent);
    font-weight: 600;
}

/* ===== 表格 ===== */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--glass-bg);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(8px);
    margin: 20px 0;
}

th, td {
    padding: 14px 20px;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-primary-light);
    font-size: 0.95rem;
}

th {
    background: var(--bg-deep);
    color: #f8fafc;
    font-weight: 600;
    letter-spacing: 0.02em;
}

tr:last-child td {
    border-bottom: none;
}

tr {
    transition: background 0.2s;
}

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

/* ===== 页脚 ===== */
.footer {
    background: var(--footer-bg-light);
    color: var(--footer-text-light);
    padding: 50px 0 30px;
    margin-top: 80px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-text);
}

.footer h4 {
    color: #ffffff;
    margin-bottom: 16px;
    font-size: 1.1rem;
    position: relative;
    padding-bottom: 8px;
}

.footer h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--accent);
}

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

.footer a {
    color: var(--footer-text-light);
    opacity: 0.9;
    transition: all 0.3s;
}

.footer a:hover {
    opacity: 1;
    color: var(--accent);
    text-decoration: none;
    padding-left: 4px;
}

.footer .grid-3 {
    margin-bottom: 30px;
}

.footer .copyright {
    border-top: 1px solid rgba(255,255,255,0.1);
    margin-top: 30px;
    padding-top: 20px;
    text-align: center;
    color: var(--footer-text-light);
    font-size: 0.9rem;
    opacity: 0.8;
}

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--gradient-btn);
    color: white;
    width: 52px;
    height: 52px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    border: none;
    z-index: 1000;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

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

.back-to-top:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

.back-to-top:active {
    transform: scale(0.9);
}

/* ===== 统计数字 ===== */
.stat-number {
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 2.5rem;
    line-height: 1.2;
}

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ===== 工具类 ===== */
.text-center { text-align: center; }
.text-accent { color: var(--accent); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.py-2 { padding: 20px 0; }

/* 渐变边框卡片 */
.gradient-border {
    position: relative;
    background: var(--bg-card);
    border-radius: 20px;
    padding: 2px;
}

.gradient-border::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 20px;
    padding: 2px;
    background: var(--gradient-text);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }
    
    .banner {
        padding: 40px 28px;
    }
    
    .banner h2 {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .nav-wrapper {
        padding: 10px 0;
        gap: 8px;
    }
    
    .brand {
        font-size: 1.3rem;
    }
    
    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: flex-start;
        padding: 12px 0;
        gap: 12px;
        background: var(--glass-bg);
        backdrop-filter: blur(12px);
        border-radius: 12px;
        padding: 16px;
        margin-top: 8px;
        box-shadow: var(--shadow-md);
    }
    
    .nav-links.active {
        display: flex;
        animation: fadeInUp 0.3s ease;
    }
    
    .nav-links a {
        width: 100%;
        padding: 8px 4px;
        border-bottom: 1px solid var(--border-light);
    }
    
    .nav-links a:last-child {
        border-bottom: none;
    }
    
    .menu-toggle {
        display: block;
        order: -1;
    }
    
    .search-box {
        order: 3;
        width: 100%;
        margin-top: 8px;
    }
    
    .search-box input {
        width: 100%;
    }
    
    .search-box input:focus {
        width: 100%;
    }
    
    .banner {
        padding: 32px 24px;
        border-radius: 24px;
        margin: 24px 0;
    }
    
    .banner h2 {
        font-size: 1.6rem;
        line-height: 1.3;
    }
    
    .banner p {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.5rem;
        margin: 36px 0 16px;
        border-left-width: 6px;
        padding-left: 14px;
    }
    
    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .grid-card {
        padding: 20px;
    }
    
    .article-card {
        padding: 16px 18px;
    }
    
    .article-card h4 {
        font-size: 1rem;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
        font-size: 20px;
    }
    
    .footer {
        padding: 40px 0 20px;
    }
    
    .footer .grid-3 {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .faq-question {
        padding: 16px 18px;
        font-size: 0.95rem;
    }
    
    .faq-answer {
        padding: 0 18px 16px;
        font-size: 0.9rem;
    }
    
    .howto-step {
        padding: 20px;
    }
    
    table {
        font-size: 0.85rem;
    }
    
    th, td {
        padding: 10px 14px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }
    
    .brand {
        font-size: 1.1rem;
    }
    
    .banner {
        padding: 28px 20px;
        border-radius: 20px;
    }
    
    .banner h2 {
        font-size: 1.4rem;
    }
    
    .section-title {
        font-size: 1.3rem;
    }
    
    .grid-card {
        padding: 16px;
        border-radius: 16px;
    }
    
    .btn {
        padding: 10px 18px;
        font-size: 0.85rem;
    }
    
    .article-card {
        padding: 14px 16px;
    }
    
    .back-to-top {
        width: 40px;
        height: 40px;
        font-size: 18px;
        bottom: 16px;
        right: 16px;
    }
    
    .stat-number {
        font-size: 1.8rem;
    }
    
    .faq-question {
        font-size: 0.9rem;
        padding: 14px 16px;
    }
    
    .faq-answer {
        font-size: 0.85rem;
        padding: 0 16px 14px;
    }
    
    .howto-step {
        padding: 16px;
        border-radius: 16px;
    }
    
    .howto-step h4 {
        font-size: 1rem;
    }
    
    .footer h4 {
        font-size: 1rem;
    }
    
    .footer p {
        font-size: 0.85rem;
    }
}

/* 减少动画偏好 */
@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;
    }
}

/* 打印样式 */
@media print {
    .sticky-nav, .back-to-top, .menu-toggle, .search-box, .icon-btn {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
    }
    
    .grid-card, .article-card, .faq-item, .howto-step {
        border: 1px solid #ddd;
        background: white;
        box-shadow: none;
        backdrop-filter: none;
    }
    
    .banner {
        background: #f0f0f0;
        color: #333;
        border: 1px solid #ddd;
    }
    
    .banner h2, .banner p {
        color: #333;
        text-shadow: none;
    }
    
    .footer {
        background: #f0f0f0;
        color: #333;
    }
}
```