```css
/* ===== 基础重置与变量 ===== */
:root {
    --primary: #2e6bff;
    --primary-dark: #1e4fd6;
    --primary-light: #5a8cff;
    --accent: #00d4aa;
    --accent-dark: #00b894;
    --bg: #f5f7fa;
    --bg-alt: #ffffff;
    --bg-card: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.72);
    --bg-glass-border: rgba(255, 255, 255, 0.35);
    --text: #1e2a3a;
    --text-secondary: #4a5b70;
    --text-muted: #7f95b0;
    --border: #e9eef5;
    --border-light: #eef2f7;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 6px 24px rgba(46, 107, 255, 0.35);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    --header-h: 68px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --gradient-hero: linear-gradient(135deg, #0b1a2f 0%, #132b4a 35%, #1e4fd6 100%);
    --gradient-accent: linear-gradient(135deg, #2e6bff 0%, #00d4aa 100%);
}

/* ===== 暗色模式 ===== */
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0a1220;
        --bg-alt: #111c2e;
        --bg-card: #14213a;
        --bg-glass: rgba(20, 33, 58, 0.72);
        --bg-glass-border: rgba(255, 255, 255, 0.08);
        --text: #e8eef7;
        --text-secondary: #a8bdd4;
        --text-muted: #6b829e;
        --border: #1e3050;
        --border-light: #1a2a45;
        --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35);
        --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.45);
        --gradient-hero: linear-gradient(135deg, #060d1a 0%, #0e1f38 35%, #1a3a7a 100%);
    }
}

/* ===== 全局重置 ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    scroll-padding-top: var(--header-h);
}

body {
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    padding: 0 0 40px;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background var(--transition), color var(--transition);
}

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

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

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

::selection {
    background: var(--primary);
    color: #fff;
}

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

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

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: var(--radius-full);
}

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

/* ===== 容器 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== 头部导航 ===== */
header {
    background: rgba(11, 26, 47, 0.85);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    color: #fff;
    padding: 14px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    transition: background var(--transition), box-shadow var(--transition);
}

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

.logo {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: #fff;
    text-decoration: none;
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 2px;
    transition: transform var(--transition);
}

.logo:hover {
    transform: scale(1.03);
    color: #fff;
}

.logo span {
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

/* 导航链接 */
.nav-links {
    display: flex;
    gap: 24px;
    list-style: none;
    flex-wrap: wrap;
    align-items: center;
}

.nav-links a {
    color: #d0dbe8;
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 500;
    position: relative;
    padding: 4px 0;
    transition: color var(--transition);
    white-space: nowrap;
}

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

.nav-links a:hover {
    color: #fff;
}

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

/* 搜索框 */
.search-box {
    display: flex;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-full);
    overflow: hidden;
    background: rgba(27, 43, 63, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.search-box:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(46, 107, 255, 0.2);
}

.search-box input {
    background: transparent;
    border: none;
    padding: 9px 18px;
    color: #fff;
    outline: none;
    font-size: 0.88rem;
    width: 170px;
    transition: width var(--transition);
}

.search-box input::placeholder {
    color: #7f95b0;
}

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

.search-box button {
    background: var(--gradient-accent);
    border: none;
    color: #fff;
    padding: 9px 20px;
    cursor: pointer;
    font-size: 0.88rem;
    font-weight: 600;
    transition: opacity var(--transition), transform var(--transition);
    white-space: nowrap;
}

.search-box button:hover {
    opacity: 0.9;
    transform: scale(1.02);
}

.search-box button:active {
    transform: scale(0.97);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #fff;
    font-size: 1.4rem;
    padding: 4px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition), transform var(--transition);
    line-height: 1.4;
}

.mobile-menu-btn:hover {
    background: rgba(255, 255, 255, 0.12);
}

.mobile-menu-btn:active {
    transform: scale(0.95);
}

/* ===== 主内容区 ===== */
main {
    margin-top: 28px;
}

section {
    margin-bottom: 48px;
    animation: fadeInUp 0.6s ease-out both;
}

/* 滚动动画关键帧 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulseGlow {
    0%, 100% { box-shadow: 0 0 0 0 rgba(46, 107, 255, 0.4); }
    50% { box-shadow: 0 0 0 8px rgba(46, 107, 255, 0); }
}

/* 各区块滚动延迟 */
section:nth-child(1) { animation-delay: 0.05s; }
section:nth-child(2) { animation-delay: 0.1s; }
section:nth-child(3) { animation-delay: 0.15s; }
section:nth-child(4) { animation-delay: 0.2s; }
section:nth-child(5) { animation-delay: 0.25s; }
section:nth-child(6) { animation-delay: 0.3s; }
section:nth-child(7) { animation-delay: 0.35s; }
section:nth-child(8) { animation-delay: 0.4s; }
section:nth-child(9) { animation-delay: 0.45s; }
section:nth-child(10) { animation-delay: 0.5s; }

/* ===== 标题层级 ===== */
h1 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 16px;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.7rem;
    font-weight: 600;
    color: var(--text);
    margin: 32px 0 16px;
    border-left: 5px solid var(--primary);
    padding-left: 18px;
    line-height: 1.35;
    position: relative;
    transition: border-color var(--transition);
}

h2::after {
    content: '';
    position: absolute;
    left: -5px;
    bottom: -4px;
    width: 40px;
    height: 3px;
    background: var(--gradient-accent);
    border-radius: var(--radius-full);
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    margin: 24px 0 10px;
    line-height: 1.4;
}

h4 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 18px 0 8px;
    line-height: 1.45;
}

p {
    margin-bottom: 14px;
    color: var(--text-secondary);
    line-height: 1.75;
}

/* ===== 面包屑 ===== */
.breadcrumb {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 2px;
}

.breadcrumb a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}

.breadcrumb a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.breadcrumb span {
    margin: 0 4px;
}

/* ===== Hero 首屏 ===== */
.hero {
    background: var(--gradient-hero);
    border-radius: var(--radius-xl);
    padding: 56px 48px;
    color: #fff;
    margin-bottom: 40px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    isolation: isolate;
}

/* 毛玻璃光晕装饰 */
.hero::before {
    content: '';
    position: absolute;
    top: -60%;
    right: -15%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(46, 107, 255, 0.35) 0%, transparent 70%);
    border-radius: 50%;
    z-index: -1;
    animation: pulseGlow 4s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -40%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 212, 170, 0.2) 0%, transparent 70%);
    border-radius: 50%;
    z-index: -1;
}

.hero h1 {
    color: #fff;
    font-size: 2.4rem;
    max-width: 800px;
    margin-bottom: 16px;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
}

.hero p {
    color: #c6d4e6;
    font-size: 1.08rem;
    max-width: 720px;
    margin-bottom: 0;
    line-height: 1.8;
}

.hero .badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    padding: 7px 20px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
    color: #e0eaff;
    transition: background var(--transition), transform var(--transition);
}

.hero .badge:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* ===== 网格布局 ===== */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

/* ===== 卡片 ===== */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 28px 24px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    opacity: 0;
    transition: opacity var(--transition);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(46, 107, 255, 0.2);
}

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

.card h3 {
    margin-top: 0;
    font-size: 1.15rem;
    color: var(--text);
    transition: color var(--transition);
}

.card:hover h3 {
    color: var(--primary);
}

.card p {
    font-size: 0.93rem;
    color: var(--text-secondary);
    margin-bottom: 0;
    line-height: 1.7;
}

/* ===== 文章列表 ===== */
.article-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.article-item {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 24px 22px;
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.article-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--gradient-accent);
    border-radius: 0 var(--radius-full) var(--radius-full) 0;
    transition: width var(--transition);
}

.article-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(46, 107, 255, 0.15);
}

.article-item:hover::after {
    width: 100%;
}

.article-item .meta {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    font-weight: 500;
    letter-spacing: 0.3px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.article-item h4 {
    margin: 0 0 10px;
    font-size: 1.08rem;
    color: var(--text);
    line-height: 1.5;
    transition: color var(--transition);
}

.article-item:hover h4 {
    color: var(--primary);
}

.article-item p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 14px;
    flex: 1;
    line-height: 1.7;
}

.read-more {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.88rem;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap var(--transition), color var(--transition);
    align-self: flex-start;
}

.read-more:hover {
    color: var(--primary-dark);
    gap: 8px;
    text-decoration: none;
}

/* ===== FAQ 手风琴 ===== */
.faq-item {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    margin-bottom: 12px;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: box-shadow var(--transition), border-color var(--transition), background var(--transition), transform var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow-sm);
    border-color: rgba(46, 107, 255, 0.15);
}

.faq-item[open] {
    box-shadow: var(--shadow-md);
    border-color: rgba(46, 107, 255, 0.2);
}

.faq-item summary {
    font-weight: 600;
    font-size: 1.02rem;
    color: var(--text);
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    cursor: pointer;
    transition: color var(--transition);
    user-select: none;
}

.faq-item summary:hover {
    color: var(--primary);
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: "＋";
    font-size: 1.3rem;
    color: var(--primary);
    font-weight: 400;
    flex-shrink: 0;
    transition: transform var(--transition), color var(--transition);
    line-height: 1;
}

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

.faq-item p {
    margin-top: 16px;
    color: var(--text-secondary);
    font-size: 0.93rem;
    border-top: 1px solid var(--border-light);
    padding-top: 16px;
    line-height: 1.8;
    animation: fadeIn 0.3s ease-out;
}

/* ===== HowTo 步骤 ===== */
.howto-step {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 22px 26px;
    margin-bottom: 16px;
    border-left: 4px solid var(--primary);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
    position: relative;
}

.howto-step:hover {
    transform: translateX(6px);
    box-shadow: var(--shadow-md);
    border-left-color: var(--accent);
}

.howto-step h4 {
    margin-top: 0;
    color: var(--primary);
    font-size: 1.05rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.howto-step p {
    margin-bottom: 0;
    font-size: 0.93rem;
    color: var(--text-secondary);
}

/* ===== 联系信息 ===== */
.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition), background var(--transition);
}

.contact-info:hover {
    box-shadow: var(--shadow-md);
}

.contact-info p {
    margin-bottom: 8px;
    font-size: 0.93rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.contact-info strong {
    color: var(--text);
    font-weight: 600;
}

/* ===== 页脚 ===== */
.footer {
    background: #0b1a2f;
    color: #a8bdd4;
    padding: 48px 0 28px;
    margin-top: 64px;
    font-size: 0.88rem;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(46, 107, 255, 0.4), transparent);
}

.footer a {
    color: #a8bdd4;
    text-decoration: none;
    transition: color var(--transition), transform var(--transition);
    display: inline-block;
}

.footer a:hover {
    color: #fff;
    transform: translateY(-1px);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px 32px;
    margin-bottom: 24px;
}

.footer p {
    color: #7f95b0;
    margin-bottom: 8px;
    font-size: 0.85rem;
    line-height: 1.7;
}

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--gradient-accent);
    color: #fff;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    text-decoration: none;
    box-shadow: var(--shadow-glow);
    opacity: 0.85;
    transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
    z-index: 99;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.back-to-top:hover {
    opacity: 1;
    transform: translateY(-4px) scale(1.08);
    box-shadow: 0 8px 28px rgba(46, 107, 255, 0.5);
    color: #fff;
}

.back-to-top:active {
    transform: translateY(-2px) scale(1.02);
}

/* ===== SVG 图标 ===== */
.svg-icon {
    width: 100%;
    height: auto;
    max-height: 120px;
    display: block;
}

/* ===== 网站地图区域链接 ===== */
section a[href^="#"] {
    transition: color var(--transition);
}

/* ===== 响应式：平板 ===== */
@media (max-width: 1024px) {
    .hero {
        padding: 44px 36px;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .search-box input {
        width: 140px;
    }

    .search-box input:focus {
        width: 180px;
    }
}

/* ===== 响应式：手机 ===== */
@media (max-width: 768px) {
    :root {
        --header-h: 60px;
    }

    body {
        padding: 0 0 24px;
    }

    .container {
        padding: 0 16px;
    }

    header {
        padding: 10px 0;
    }

    .nav-wrap {
        gap: 8px;
    }

    .logo {
        font-size: 1.3rem;
    }

    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0;
        padding: 8px 0 4px;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        margin-top: 8px;
    }

    .nav-links.active {
        display: flex;
        animation: fadeIn 0.25s ease-out;
    }

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        padding: 10px 4px;
        font-size: 0.95rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .nav-links a::after {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .search-box {
        width: 100%;
        margin-top: 4px;
        order: 3;
    }

    .search-box input {
        width: 100%;
        flex: 1;
    }

    .search-box input:focus {
        width: 100%;
    }

    .hero {
        padding: 32px 22px;
        border-radius: var(--radius-lg);
    }

    .hero h1 {
        font-size: 1.55rem;
    }

    .hero p {
        font-size: 0.95rem;
    }

    .hero .badge {
        font-size: 0.78rem;
        padding: 5px 14px;
    }

    h1 {
        font-size: 1.6rem;
    }

    h2 {
        font-size: 1.3rem;
        padding-left: 14px;
        margin: 28px 0 14px;
    }

    h2::after {
        width: 32px;
    }

    h3 {
        font-size: 1.1rem;
    }

    section {
        margin-bottom: 36px;
    }

    .grid-3 {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .article-list {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .card {
        padding: 22px 18px;
    }

    .article-item {
        padding: 20px 18px;
    }

    .faq-item {
        padding: 16px 18px;
    }

    .faq-item summary {
        font-size: 0.95rem;
    }

    .howto-step {
        padding: 18px 20px;
    }

    .contact-info {
        grid-template-columns: 1fr;
        padding: 24px 20px;
        gap: 20px;
    }

    .footer {
        padding: 36px 0 20px;
        margin-top: 48px;
    }

    .footer-links {
        gap: 12px 20px;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
        font-size: 1.1rem;
    }
}

/* ===== 响应式：超小屏 ===== */
@media (max-width: 400px) {
    .hero h1 {
        font-size: 1.35rem;
    }

    h2 {
        font-size: 1.15rem;
    }

    .search-box button {
        padding: 9px 14px;
        font-size: 0.82rem;
    }
}

/* ===== 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 {
    header,
    .back-to-top,
    .footer,
    .search-box,
    .mobile-menu-btn {
        display: none !important;
    }

    body {
        background: #fff;
        color: #000;
    }

    .hero {
        background: #f0f0f0;
        color: #000;
    }

    .hero h1,
    .hero p {
        color: #000;
    }

    section {
        animation: none;
    }
}
```