/* roulang page: index */
/* ===== 设计变量 ===== */
    :root {
        --primary: #0f2b4a;
        --primary-light: #1c4a7a;
        --primary-dark: #091a2e;
        --secondary: #d94a2a;
        --secondary-light: #e86a4a;
        --accent: #f0b45a;
        --accent-light: #f7d48a;
        --bg: #f4f6f8;
        --bg-white: #ffffff;
        --bg-dark: #0f1a2a;
        --text: #1e2a3a;
        --text-light: #5a6a7a;
        --text-white: #f0f4f8;
        --border: #dce2e8;
        --border-light: #e8edf2;
        --radius: 14px;
        --radius-sm: 8px;
        --radius-lg: 20px;
        --shadow: 0 4px 24px rgba(15, 43, 74, 0.08);
        --shadow-hover: 0 12px 40px rgba(15, 43, 74, 0.16);
        --shadow-lg: 0 20px 60px rgba(15, 43, 74, 0.12);
        --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        --max-width: 1200px;
        --header-height: 72px;
        --spacing-section: 5rem;
        --spacing-block: 2.5rem;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
    body {
        font-family: var(--font);
        font-size: 16px;
        line-height: 1.7;
        color: var(--text);
        background: var(--bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
    a:hover { color: var(--secondary); }
    a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
    img { max-width: 100%; height: auto; display: block; }
    button, input, textarea, select { font-family: inherit; font-size: inherit; }
    button { cursor: pointer; border: none; background: none; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--primary); font-weight: 700; }
    h1 { font-size: 2.8rem; letter-spacing: -0.02em; }
    h2 { font-size: 2rem; letter-spacing: -0.01em; }
    h3 { font-size: 1.35rem; }
    h4 { font-size: 1.1rem; }
    p { margin-bottom: 1rem; color: var(--text-light); }
    ::selection { background: var(--accent); color: var(--primary-dark); }
    :focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

    /* ===== 容器 ===== */
    .container {
        width: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 1.5rem;
    }
    .container-narrow { max-width: 880px; }

    /* ===== 网格 ===== */
    .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
    .grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 2rem; }
    .grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 1.5rem; }

    /* ===== 间距 ===== */
    .section { padding: var(--spacing-section) 0; }
    .section-title {
        text-align: center;
        margin-bottom: 3rem;
    }
    .section-title h2 {
        position: relative;
        display: inline-block;
        margin-bottom: 0.75rem;
    }
    .section-title h2::after {
        content: '';
        display: block;
        width: 60px;
        height: 4px;
        background: var(--secondary);
        border-radius: 4px;
        margin: 0.75rem auto 0;
    }
    .section-title p {
        max-width: 600px;
        margin: 0.5rem auto 0;
        font-size: 1.05rem;
    }

    /* ===== 按钮 ===== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 0.5rem;
        padding: 0.8rem 2rem;
        border-radius: var(--radius-sm);
        font-weight: 600;
        font-size: 1rem;
        line-height: 1.4;
        transition: all var(--transition);
        border: 2px solid transparent;
        white-space: nowrap;
    }
    .btn-primary {
        background: var(--secondary);
        color: #fff;
        border-color: var(--secondary);
    }
    .btn-primary:hover {
        background: var(--secondary-light);
        border-color: var(--secondary-light);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(217, 74, 42, 0.35);
    }
    .btn-primary:active { transform: translateY(0); box-shadow: 0 4px 12px rgba(217, 74, 42, 0.25); }
    .btn-outline {
        background: transparent;
        color: var(--primary);
        border-color: var(--primary);
    }
    .btn-outline:hover {
        background: var(--primary);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(15, 43, 74, 0.25);
    }
    .btn-outline:active { transform: translateY(0); }
    .btn-white {
        background: #fff;
        color: var(--primary);
        border-color: #fff;
    }
    .btn-white:hover {
        background: var(--accent-light);
        color: var(--primary-dark);
        border-color: var(--accent-light);
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(255, 255, 255, 0.3);
    }
    .btn-lg { padding: 1rem 2.8rem; font-size: 1.1rem; border-radius: var(--radius); }
    .btn-sm { padding: 0.5rem 1.2rem; font-size: 0.875rem; }

    /* ===== 徽章 & 标签 ===== */
    .badge {
        display: inline-flex;
        align-items: center;
        padding: 0.2rem 0.8rem;
        border-radius: 100px;
        font-size: 0.8rem;
        font-weight: 600;
        line-height: 1.5;
        background: var(--accent);
        color: var(--primary-dark);
    }
    .badge-hot {
        background: var(--secondary);
        color: #fff;
    }
    .badge-new {
        background: #2d8e6a;
        color: #fff;
    }
    .tag {
        display: inline-block;
        padding: 0.25rem 0.9rem;
        border-radius: 100px;
        font-size: 0.8rem;
        font-weight: 500;
        background: var(--bg);
        color: var(--text-light);
        border: 1px solid var(--border);
        transition: all var(--transition);
    }
    .tag:hover {
        background: var(--primary);
        color: #fff;
        border-color: var(--primary);
    }

    /* ===== 卡片 ===== */
    .card {
        background: var(--bg-white);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        overflow: hidden;
        transition: all var(--transition);
    }
    .card:hover {
        box-shadow: var(--shadow-hover);
        transform: translateY(-4px);
    }
    .card-img {
        width: 100%;
        aspect-ratio: 16 / 10;
        object-fit: cover;
        display: block;
    }
    .card-body { padding: 1.5rem; }
    .card-body h3 { margin-bottom: 0.5rem; font-size: 1.15rem; }
    .card-body p { font-size: 0.95rem; margin-bottom: 0; }
    .card-meta {
        display: flex;
        align-items: center;
        gap: 1rem;
        font-size: 0.85rem;
        color: var(--text-light);
        margin-top: 0.75rem;
    }
    .card-meta .badge { font-size: 0.75rem; }

    /* ===== 统计数字块 ===== */
    .stat-item {
        text-align: center;
        padding: 1.5rem;
    }
    .stat-number {
        font-size: 2.8rem;
        font-weight: 800;
        color: var(--secondary);
        line-height: 1.2;
        letter-spacing: -0.02em;
    }
    .stat-label {
        font-size: 0.95rem;
        color: var(--text-light);
        margin-top: 0.3rem;
    }

    /* ===== 列表 ===== */
    .list-tight li {
        padding: 0.75rem 0;
        border-bottom: 1px solid var(--border-light);
        display: flex;
        align-items: flex-start;
        gap: 0.75rem;
    }
    .list-tight li:last-child { border-bottom: none; }
    .list-tight li::before {
        content: '▸';
        color: var(--secondary);
        font-weight: 700;
        flex-shrink: 0;
    }

    /* ===== 分割线 ===== */
    .divider {
        width: 100%;
        height: 1px;
        background: linear-gradient(to right, transparent, var(--border), transparent);
        margin: 2rem 0;
    }

    /* ===== 导航 ===== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(255, 255, 255, 0.96);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border-light);
        box-shadow: 0 2px 20px rgba(15, 43, 74, 0.06);
        height: var(--header-height);
        display: flex;
        align-items: center;
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 1.5rem;
    }
    .logo {
        font-size: 1.5rem;
        font-weight: 800;
        color: var(--primary);
        letter-spacing: -0.02em;
        display: flex;
        align-items: center;
        gap: 0.4rem;
        white-space: nowrap;
    }
    .logo:hover { color: var(--primary); }
    .logo-icon {
        width: 36px;
        height: 36px;
        background: var(--secondary);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-weight: 800;
        font-size: 1.1rem;
        flex-shrink: 0;
    }
    .nav-main {
        display: flex;
        align-items: center;
        gap: 0.25rem;
    }
    .nav-main a {
        padding: 0.5rem 1.2rem;
        border-radius: var(--radius-sm);
        font-weight: 500;
        font-size: 0.95rem;
        color: var(--text);
        transition: all var(--transition);
        position: relative;
    }
    .nav-main a:hover {
        color: var(--primary);
        background: rgba(15, 43, 74, 0.06);
    }
    .nav-main a.active {
        color: #fff;
        background: var(--primary);
    }
    .nav-main a.active:hover {
        color: #fff;
        background: var(--primary-light);
    }
    .nav-right {
        display: flex;
        align-items: center;
        gap: 0.75rem;
    }
    .search-toggle {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--bg);
        color: var(--text);
        transition: all var(--transition);
        font-size: 1.1rem;
    }
    .search-toggle:hover {
        background: var(--primary);
        color: #fff;
    }
    .menu-toggle {
        display: none;
        width: 40px;
        height: 40px;
        border-radius: var(--radius-sm);
        align-items: center;
        justify-content: center;
        flex-direction: column;
        gap: 5px;
        background: var(--bg);
        transition: background var(--transition);
    }
    .menu-toggle:hover { background: var(--border-light); }
    .menu-toggle span {
        display: block;
        width: 22px;
        height: 2.5px;
        background: var(--text);
        border-radius: 4px;
        transition: all var(--transition);
    }
    .menu-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .menu-toggle.open span:nth-child(2) { opacity: 0; }
    .menu-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

    /* 搜索栏 */
    .search-bar {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border);
        padding: 1rem 1.5rem;
        box-shadow: var(--shadow);
        z-index: 99;
    }
    .search-bar.open { display: block; }
    .search-bar form {
        display: flex;
        gap: 0.75rem;
        max-width: 600px;
        margin: 0 auto;
    }
    .search-bar input {
        flex: 1;
        padding: 0.8rem 1.2rem;
        border: 2px solid var(--border);
        border-radius: var(--radius-sm);
        font-size: 1rem;
        transition: border var(--transition);
        background: var(--bg-white);
    }
    .search-bar input:focus {
        border-color: var(--primary);
        outline: none;
    }

    /* ===== Hero 首屏 ===== */
    .hero {
        position: relative;
        min-height: 520px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--primary-dark);
        background-image: url('/assets/images/backpic/back-1.png');
        background-size: cover;
        background-position: center;
        background-blend-mode: overlay;
        overflow: hidden;
    }
    .hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(15, 43, 74, 0.85) 0%, rgba(15, 43, 74, 0.5) 60%, rgba(217, 74, 42, 0.25) 100%);
        z-index: 1;
    }
    .hero-content {
        position: relative;
        z-index: 2;
        text-align: center;
        max-width: 780px;
        padding: 3rem 1.5rem;
    }
    .hero-content h1 {
        color: #fff;
        font-size: 3.2rem;
        font-weight: 800;
        letter-spacing: -0.02em;
        line-height: 1.2;
        margin-bottom: 1rem;
        text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    }
    .hero-content p {
        color: rgba(255, 255, 255, 0.85);
        font-size: 1.2rem;
        max-width: 580px;
        margin: 0 auto 2rem;
        line-height: 1.6;
        text-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
    }
    .hero-actions {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 1rem;
        flex-wrap: wrap;
    }
    .hero-badge {
        display: inline-block;
        padding: 0.35rem 1.2rem;
        border-radius: 100px;
        background: rgba(255, 255, 255, 0.15);
        backdrop-filter: blur(8px);
        color: rgba(255, 255, 255, 0.9);
        font-size: 0.85rem;
        font-weight: 500;
        margin-bottom: 1.5rem;
        border: 1px solid rgba(255, 255, 255, 0.1);
    }

    /* ===== 关于板块 ===== */
    .about-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
        align-items: center;
    }
    .about-image {
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-lg);
    }
    .about-image img {
        width: 100%;
        height: 360px;
        object-fit: cover;
    }
    .about-text h2 { margin-bottom: 1rem; }
    .about-text p { font-size: 1.05rem; line-height: 1.8; }
    .about-features {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
        margin-top: 1.5rem;
    }
    .about-feature {
        display: flex;
        align-items: center;
        gap: 0.6rem;
        font-weight: 500;
        color: var(--text);
    }
    .about-feature .icon {
        width: 32px;
        height: 32px;
        border-radius: 50%;
        background: rgba(217, 74, 42, 0.1);
        color: var(--secondary);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1rem;
        flex-shrink: 0;
    }

    /* ===== 分类入口 ===== */
    .category-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 1.5rem;
    }
    .category-card {
        background: var(--bg-white);
        border-radius: var(--radius);
        overflow: hidden;
        box-shadow: var(--shadow);
        transition: all var(--transition);
        cursor: pointer;
        text-align: center;
    }
    .category-card:hover {
        box-shadow: var(--shadow-hover);
        transform: translateY(-6px);
    }
    .category-card-img {
        width: 100%;
        aspect-ratio: 4 / 3;
        object-fit: cover;
    }
    .category-card-body {
        padding: 1.2rem 1rem 1.5rem;
    }
    .category-card-body h3 {
        font-size: 1.05rem;
        margin-bottom: 0.3rem;
    }
    .category-card-body p {
        font-size: 0.85rem;
        color: var(--text-light);
        margin-bottom: 0;
    }

    /* ===== 最新资讯 ===== */
    .news-grid {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;
        gap: 1.5rem;
    }
    .news-card {
        background: var(--bg-white);
        border-radius: var(--radius);
        overflow: hidden;
        box-shadow: var(--shadow);
        transition: all var(--transition);
        display: flex;
        flex-direction: column;
    }
    .news-card:hover {
        box-shadow: var(--shadow-hover);
        transform: translateY(-4px);
    }
    .news-card-img {
        width: 100%;
        aspect-ratio: 16 / 9;
        object-fit: cover;
    }
    .news-card-body {
        padding: 1.2rem 1.5rem 1.5rem;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .news-card-body .badge {
        align-self: flex-start;
        margin-bottom: 0.6rem;
    }
    .news-card-body h3 {
        font-size: 1.05rem;
        margin-bottom: 0.4rem;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-card-body p {
        font-size: 0.9rem;
        color: var(--text-light);
        margin-bottom: 0.75rem;
        flex: 1;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-card-footer {
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 0.85rem;
        color: var(--text-light);
        border-top: 1px solid var(--border-light);
        padding-top: 0.75rem;
    }
    .news-empty {
        grid-column: 1 / -1;
        text-align: center;
        padding: 3rem 1.5rem;
        background: var(--bg-white);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
    }
    .news-empty p {
        font-size: 1.1rem;
        color: var(--text-light);
        margin-bottom: 0;
    }

    /* ===== 数据统计 ===== */
    .stats-section {
        background: var(--primary);
        background-image: url('/assets/images/backpic/back-2.png');
        background-size: cover;
        background-position: center;
        background-blend-mode: overlay;
        color: #fff;
    }
    .stats-section .section-title h2 { color: #fff; }
    .stats-section .section-title h2::after { background: var(--accent); }
    .stats-section .section-title p { color: rgba(255, 255, 255, 0.7); }
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 1.5rem;
    }
    .stats-grid .stat-number { color: var(--accent); }
    .stats-grid .stat-label { color: rgba(255, 255, 255, 0.7); }

    /* ===== 平台优势 ===== */
    .advantages-grid {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;
        gap: 2rem;
    }
    .advantage-card {
        background: var(--bg-white);
        border-radius: var(--radius);
        padding: 2rem 1.8rem;
        box-shadow: var(--shadow);
        transition: all var(--transition);
        text-align: center;
        border-top: 4px solid transparent;
    }
    .advantage-card:hover {
        box-shadow: var(--shadow-hover);
        transform: translateY(-4px);
        border-top-color: var(--secondary);
    }
    .advantage-icon {
        width: 64px;
        height: 64px;
        border-radius: 50%;
        background: rgba(217, 74, 42, 0.08);
        color: var(--secondary);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.8rem;
        margin: 0 auto 1.2rem;
        transition: background var(--transition);
    }
    .advantage-card:hover .advantage-icon {
        background: var(--secondary);
        color: #fff;
    }
    .advantage-card h3 { font-size: 1.15rem; margin-bottom: 0.6rem; }
    .advantage-card p { font-size: 0.95rem; margin-bottom: 0; }

    /* ===== FAQ ===== */
    .faq-list { max-width: 780px; margin: 0 auto; }
    .faq-item {
        background: var(--bg-white);
        border-radius: var(--radius-sm);
        margin-bottom: 0.75rem;
        box-shadow: 0 2px 12px rgba(15, 43, 74, 0.06);
        overflow: hidden;
        border: 1px solid var(--border-light);
    }
    .faq-question {
        width: 100%;
        padding: 1.2rem 1.5rem;
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-weight: 600;
        font-size: 1rem;
        color: var(--text);
        background: none;
        text-align: left;
        transition: background var(--transition);
    }
    .faq-question:hover { background: rgba(15, 43, 74, 0.03); }
    .faq-question .icon {
        font-size: 1.2rem;
        transition: transform var(--transition);
        color: var(--secondary);
        flex-shrink: 0;
        margin-left: 1rem;
    }
    .faq-item.open .faq-question .icon { transform: rotate(45deg); }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease, padding 0.35s ease;
    }
    .faq-item.open .faq-answer {
        max-height: 300px;
        padding: 0 1.5rem 1.2rem;
    }
    .faq-answer p {
        font-size: 0.95rem;
        color: var(--text-light);
        margin-bottom: 0;
        line-height: 1.7;
    }

    /* ===== CTA ===== */
    .cta-section {
        background: var(--primary);
        background-image: url('/assets/images/backpic/back-3.png');
        background-size: cover;
        background-position: center;
        background-blend-mode: overlay;
        text-align: center;
        padding: 4.5rem 1.5rem;
    }
    .cta-section h2 {
        color: #fff;
        font-size: 2.2rem;
        margin-bottom: 0.75rem;
    }
    .cta-section p {
        color: rgba(255, 255, 255, 0.75);
        font-size: 1.1rem;
        max-width: 520px;
        margin: 0 auto 2rem;
    }

    /* ===== 页脚 ===== */
    .site-footer {
        background: var(--bg-dark);
        color: rgba(255, 255, 255, 0.7);
        padding: 3.5rem 0 2rem;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 2.5rem;
        margin-bottom: 2rem;
    }
    .footer-brand .logo { color: #fff; margin-bottom: 0.8rem; }
    .footer-brand p {
        font-size: 0.9rem;
        color: rgba(255, 255, 255, 0.55);
        max-width: 300px;
        line-height: 1.7;
        margin-bottom: 0;
    }
    .footer-col h4 {
        color: #fff;
        font-size: 1rem;
        margin-bottom: 1rem;
        font-weight: 600;
    }
    .footer-col a {
        display: block;
        color: rgba(255, 255, 255, 0.55);
        font-size: 0.9rem;
        padding: 0.3rem 0;
        transition: color var(--transition);
    }
    .footer-col a:hover { color: var(--accent); }
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding-top: 1.5rem;
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: 1rem;
        font-size: 0.85rem;
        color: rgba(255, 255, 255, 0.4);
    }
    .footer-bottom a { color: rgba(255, 255, 255, 0.4); }
    .footer-bottom a:hover { color: var(--accent); }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .category-grid { grid-template-columns: repeat(2, 1fr); }
        .news-grid { grid-template-columns: 1fr 1fr; }
        .advantages-grid { grid-template-columns: 1fr 1fr; }
        .footer-grid { grid-template-columns: 1fr 1fr; }
        .stats-grid { grid-template-columns: repeat(2, 1fr); }
        .hero-content h1 { font-size: 2.6rem; }
    }

    @media (max-width: 768px) {
        :root { --header-height: 64px; --spacing-section: 3rem; }
        h1 { font-size: 2rem; }
        h2 { font-size: 1.6rem; }
        .menu-toggle { display: flex; }
        .nav-main {
            display: none;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(16px);
            flex-direction: column;
            padding: 1rem 1.5rem;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow);
            gap: 0.25rem;
        }
        .nav-main.open { display: flex; }
        .nav-main a { width: 100%; padding: 0.75rem 1rem; border-radius: var(--radius-sm); }
        .nav-right .btn-outline { display: none; }
        .hero { min-height: 400px; }
        .hero-content h1 { font-size: 2rem; }
        .hero-content p { font-size: 1rem; }
        .about-grid { grid-template-columns: 1fr; gap: 2rem; }
        .about-image img { height: 240px; }
        .about-features { grid-template-columns: 1fr; }
        .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
        .news-grid { grid-template-columns: 1fr; }
        .category-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
        .advantages-grid { grid-template-columns: 1fr; }
        .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
        .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
        .footer-bottom { flex-direction: column; text-align: center; }
        .cta-section h2 { font-size: 1.6rem; }
        .cta-section p { font-size: 1rem; }
        .section-title { margin-bottom: 2rem; }
    }

    @media (max-width: 520px) {
        .container { padding: 0 1rem; }
        .hero-content h1 { font-size: 1.7rem; }
        .hero-content p { font-size: 0.95rem; }
        .category-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
        .category-card-body { padding: 0.8rem; }
        .category-card-body h3 { font-size: 0.9rem; }
        .stats-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
        .stat-number { font-size: 2rem; }
        .btn-lg { padding: 0.8rem 1.8rem; font-size: 1rem; }
        .logo { font-size: 1.2rem; }
        .logo-icon { width: 30px; height: 30px; font-size: 0.9rem; }
    }

    /* ===== 辅助 ===== */
    .text-center { text-align: center; }
    .mt-1 { margin-top: 1rem; }
    .mt-2 { margin-top: 2rem; }
    .mb-1 { margin-bottom: 1rem; }
    .mb-2 { margin-bottom: 2rem; }
    .sr-only {
        position: absolute;
        width: 1px;
        height: 1px;
        padding: 0;
        margin: -1px;
        overflow: hidden;
        clip: rect(0,0,0,0);
        white-space: nowrap;
        border: 0;
    }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #c0392b;
            --primary-dark: #a93226;
            --primary-light: #e74c3c;
            --secondary: #2c3e50;
            --secondary-light: #34495e;
            --accent: #f39c12;
            --bg-body: #f5f6fa;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #1a252f;
            --text-primary: #1e272e;
            --text-secondary: #576574;
            --text-light: #8395a7;
            --text-white: #f5f6fa;
            --border: #e1e8ee;
            --border-light: #f0f3f7;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-height);
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: 2.2rem; }
        h2 { font-size: 1.75rem; }
        h3 { font-size: 1.35rem; }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 12px rgba(0,0,0,0.04);
            z-index: 1000;
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1.1rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .logo span { color: var(--primary); }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-main a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .nav-main a:hover { color: var(--primary); background: rgba(192,57,43,0.06); }
        .nav-main a.active {
            color: var(--primary);
            background: rgba(192,57,43,0.1);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-toggle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: transparent;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition);
            font-size: 1rem;
        }
        .search-toggle:hover { border-color: var(--primary); color: var(--primary); background: rgba(192,57,43,0.04); }
        .mobile-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border: none;
            background: transparent;
            color: var(--text-primary);
            font-size: 1.4rem;
            cursor: pointer;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .mobile-toggle:hover { background: var(--border-light); }

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,37,47,0.85) 0%, rgba(44,62,80,0.7) 100%);
            z-index: 1;
        }
        .article-banner .container { position: relative; z-index: 2; }
        .article-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-banner .breadcrumb a { color: rgba(255,255,255,0.8); }
        .article-banner .breadcrumb a:hover { color: #fff; }
        .article-banner .breadcrumb .sep { opacity: 0.5; }
        .article-banner h1 {
            font-size: 2.4rem;
            color: #fff;
            max-width: 800px;
            line-height: 1.3;
            margin-bottom: 16px;
            text-shadow: 0 2px 12px rgba(0,0,0,0.3);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 24px;
            color: rgba(255,255,255,0.8);
            font-size: 0.9rem;
        }
        .article-meta .category {
            display: inline-block;
            padding: 4px 14px;
            background: var(--primary);
            color: #fff;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .article-meta i { margin-right: 6px; opacity: 0.7; }

        /* ===== Article Body ===== */
        .article-section {
            padding: 60px 0;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }
        .article-main {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 40px;
            border: 1px solid var(--border-light);
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-secondary);
        }
        .article-content p { margin-bottom: 1.2rem; }
        .article-content h2, .article-content h3 { margin-top: 1.8rem; margin-bottom: 0.8rem; color: var(--text-primary); }
        .article-content img { border-radius: var(--radius-md); margin: 1.5rem 0; box-shadow: var(--shadow-sm); }
        .article-content ul, .article-content ol { padding-left: 1.5rem; margin-bottom: 1.2rem; }
        .article-content li { margin-bottom: 0.5rem; list-style: disc; }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg-body);
            padding: 16px 24px;
            margin: 1.5rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
        .article-content a:hover { color: var(--primary-dark); }

        .article-footer-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            gap: 16px;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-tags .tag {
            display: inline-block;
            padding: 4px 14px;
            background: var(--bg-body);
            border: 1px solid var(--border);
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .article-tags .tag:hover { border-color: var(--primary); color: var(--primary); background: rgba(192,57,43,0.04); }
        .article-share {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border: 1px solid var(--border);
            border-radius: 50%;
            color: var(--text-secondary);
            transition: all var(--transition);
            font-size: 0.95rem;
        }
        .article-share a:hover { border-color: var(--primary); color: var(--primary); background: rgba(192,57,43,0.04); }

        /* ===== Article Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 28px;
            border: 1px solid var(--border-light);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-related-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .sidebar-related-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            padding-bottom: 14px;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-related-item:last-child { border-bottom: none; padding-bottom: 0; }
        .sidebar-related-item img {
            width: 70px;
            height: 70px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
            background: var(--border-light);
        }
        .sidebar-related-item .info { flex: 1; min-width: 0; }
        .sidebar-related-item .info a {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition);
        }
        .sidebar-related-item .info a:hover { color: var(--primary); }
        .sidebar-related-item .info .meta {
            font-size: 0.75rem;
            color: var(--text-light);
            margin-top: 4px;
        }
        .sidebar-category-list a {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .sidebar-category-list a:last-child { border-bottom: none; }
        .sidebar-category-list a:hover { color: var(--primary); }
        .sidebar-category-list a span { color: var(--text-light); font-size: 0.8rem; }

        /* ===== Related Posts Section ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-body);
        }
        .related-section .section-title {
            text-align: center;
            margin-bottom: 40px;
        }
        .related-section .section-title h2 {
            font-size: 1.8rem;
            position: relative;
            display: inline-block;
        }
        .related-section .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
            margin: 12px auto 0;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .related-card .thumb {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--border-light);
        }
        .related-card .body { padding: 20px 22px 24px; }
        .related-card .body .cat {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(192,57,43,0.08);
            color: var(--primary);
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .related-card .body h3 { font-size: 1.05rem; margin-bottom: 8px; }
        .related-card .body h3 a { color: var(--text-primary); }
        .related-card .body h3 a:hover { color: var(--primary); }
        .related-card .body p {
            font-size: 0.85rem;
            color: var(--text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0;
        }
        .related-card .body .meta {
            font-size: 0.78rem;
            color: var(--text-light);
            margin-top: 12px;
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .not-found-box i { font-size: 3rem; color: var(--text-light); margin-bottom: 20px; }
        .not-found-box h2 { font-size: 1.6rem; margin-bottom: 12px; }
        .not-found-box p { color: var(--text-secondary); margin-bottom: 24px; }
        .not-found-box .btn { display: inline-block; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
        }
        .btn-primary { background: var(--primary); color: #fff; }
        .btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); box-shadow: 0 4px 16px rgba(192,57,43,0.3); }
        .btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
        .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-1px); }
        .btn-sm { padding: 8px 18px; font-size: 0.85rem; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 64px 0 0;
        }
        .site-footer .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; font-size: 1.3rem; }
        .footer-brand .logo .logo-icon { background: var(--primary); }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.6); line-height: 1.7; max-width: 360px; }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 18px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            padding: 6px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover { color: var(--primary-light); }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.4);
            gap: 12px;
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--primary-light); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 768px) {
            :root { --header-height: 64px; }
            h1 { font-size: 1.6rem; }
            h2 { font-size: 1.35rem; }
            .nav-main { display: none; }
            .nav-main.open { display: flex; flex-direction: column; position: absolute; top: var(--header-height); left: 0; width: 100%; background: var(--bg-white); border-bottom: 1px solid var(--border); box-shadow: var(--shadow-md); padding: 16px 24px; gap: 4px; }
            .nav-main.open a { padding: 12px 16px; width: 100%; }
            .mobile-toggle { display: flex; }
            .article-banner { padding: 60px 0 40px; min-height: 240px; }
            .article-banner h1 { font-size: 1.6rem; }
            .article-main { padding: 24px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .article-footer-bar { flex-direction: column; align-items: flex-start; }
            .nav-actions .search-toggle { display: none; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-main { padding: 16px; }
            .article-content { font-size: 1rem; }
            .sidebar-card { padding: 20px; }
            .article-meta { gap: 10px 16px; font-size: 0.82rem; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mb-0 { margin-bottom: 0; }
        .mt-2 { margin-top: 0.5rem; }
        .gap-2 { gap: 0.5rem; }
        .flex-wrap { flex-wrap: wrap; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #f1c0c4;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --bg-body: #f8f9fa;
            --bg-white: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-card: #ffffff;
            --bg-footer: #0d1b2a;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --text-muted: #8a8aa0;
            --border-color: #e9ecef;
            --border-light: #f0f0f0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.14);
            --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.18);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --spacer-xs: 0.5rem;
            --spacer-sm: 1rem;
            --spacer-md: 2rem;
            --spacer-lg: 4rem;
            --spacer-xl: 6rem;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.6;
            font-size: 16px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        a {
            color: var(--secondary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }
        h1 {
            font-size: 2.6rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacer-md);
        }

        /* ===== Header & Nav ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacer-md);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-primary);
            white-space: nowrap;
        }
        .logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1.3rem;
            font-weight: 700;
        }
        .logo span:not(.logo-icon) {
            color: var(--secondary);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 2px;
        }
        .nav-main a {
            padding: 0.6rem 1.2rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: background var(--transition), color var(--transition);
            position: relative;
        }
        .nav-main a:hover {
            background: var(--bg-body);
            color: var(--primary);
        }
        .nav-main a.active {
            background: var(--primary);
            color: #fff;
        }
        .nav-main a.active:hover {
            background: var(--primary-dark);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: var(--spacer-sm);
        }
        .search-toggle {
            background: none;
            border: none;
            font-size: 1.2rem;
            color: var(--text-secondary);
            cursor: pointer;
            padding: 0.4rem 0.6rem;
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
        }
        .search-toggle:hover {
            background: var(--bg-body);
            color: var(--primary);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 0.2rem 0.4rem;
        }

        /* ===== 移动端导航 ===== */
        @media (max-width: 820px) {
            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: var(--spacer-sm) var(--spacer-md);
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: transform 0.35s ease, opacity 0.35s ease;
                gap: 4px;
                z-index: 999;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-main a {
                padding: 0.75rem 1rem;
                font-size: 1.05rem;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .hamburger {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
        }

        /* ===== Hero / 分类 Banner ===== */
        .category-hero {
            position: relative;
            background: var(--secondary);
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            overflow: hidden;
            padding: var(--spacer-xl) var(--spacer-md);
        }
        .category-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
            z-index: 1;
        }
        .category-hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.85) 0%, rgba(230, 57, 70, 0.40) 100%);
            z-index: 2;
        }
        .category-hero-content {
            position: relative;
            z-index: 3;
            max-width: 780px;
            color: var(--text-white);
        }
        .category-hero-content h1 {
            font-size: 3rem;
            color: #fff;
            margin-bottom: 0.6rem;
            letter-spacing: -0.5px;
        }
        .category-hero-content p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 0;
            line-height: 1.7;
        }
        .category-hero .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-top: var(--spacer-md);
        }
        .category-hero .hero-tags a {
            display: inline-block;
            padding: 0.4rem 1.2rem;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 30px;
            color: #fff;
            font-size: 0.9rem;
            font-weight: 500;
            transition: background var(--transition), transform var(--transition);
        }
        .category-hero .hero-tags a:hover {
            background: var(--primary);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: var(--spacer-xl) 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: var(--spacer-lg);
        }
        .section-title h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }
        .section-title p {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-title .title-bar {
            display: inline-block;
            width: 50px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin-top: 0.75rem;
        }
        .section-bg-light {
            background: var(--bg-white);
        }
        .section-bg-alt {
            background: var(--bg-body);
        }

        /* ===== 分类标签筛选 ===== */
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-bottom: var(--spacer-md);
            padding: 0 var(--spacer-sm);
        }
        .filter-bar .filter-btn {
            padding: 0.5rem 1.4rem;
            border-radius: 30px;
            border: 1px solid var(--border-color);
            background: var(--bg-white);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all var(--transition);
        }
        .filter-bar .filter-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        .filter-bar .filter-btn.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacer-md);
        }
        .card-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            display: flex;
            flex-direction: column;
        }
        .card-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .card-item .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }
        .card-item .card-body {
            padding: 1.2rem 1.2rem 1.4rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-item .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 0.2rem 0.8rem;
            border-radius: 20px;
            margin-bottom: 0.5rem;
            align-self: flex-start;
        }
        .card-item h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
            color: var(--text-primary);
            line-height: 1.4;
        }
        .card-item h3 a {
            color: inherit;
        }
        .card-item h3 a:hover {
            color: var(--primary);
        }
        .card-item .card-meta {
            font-size: 0.85rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: auto;
            padding-top: 0.8rem;
            border-top: 1px solid var(--border-light);
        }
        .card-item .card-meta i {
            margin-right: 4px;
        }

        /* ===== 排行/榜单 ===== */
        .rank-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacer-md);
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: var(--spacer-sm);
            background: var(--bg-white);
            padding: 1rem 1.2rem;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .rank-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .rank-item .rank-num {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1rem;
            background: var(--bg-body);
            color: var(--text-secondary);
            flex-shrink: 0;
        }
        .rank-item:nth-child(1) .rank-num {
            background: var(--primary);
            color: #fff;
        }
        .rank-item:nth-child(2) .rank-num {
            background: var(--accent);
            color: #fff;
        }
        .rank-item:nth-child(3) .rank-num {
            background: var(--secondary-light);
            color: #fff;
        }
        .rank-item .rank-info {
            flex: 1;
        }
        .rank-item .rank-info h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.15rem;
        }
        .rank-item .rank-info span {
            font-size: 0.85rem;
            color: var(--text-light);
        }
        .rank-item .rank-stat {
            font-weight: 700;
            color: var(--primary);
            font-size: 1.1rem;
        }

        /* ===== 专题卡片（横向） ===== */
        .feature-cards {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacer-md);
        }
        .feature-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            min-height: 240px;
            display: flex;
            align-items: flex-end;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .feature-card .feature-bg {
            position: absolute;
            inset: 0;
            object-fit: cover;
            width: 100%;
            height: 100%;
            border-radius: 0;
            z-index: 0;
        }
        .feature-card .feature-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, rgba(0, 0, 0, 0.1) 70%);
            z-index: 1;
        }
        .feature-card .feature-body {
            position: relative;
            z-index: 2;
            padding: 1.5rem;
            color: #fff;
            width: 100%;
        }
        .feature-card .feature-body h3 {
            font-size: 1.3rem;
            color: #fff;
            margin-bottom: 0.3rem;
        }
        .feature-card .feature-body p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.95rem;
            margin-bottom: 0;
        }
        .feature-card .feature-body .feature-link {
            display: inline-block;
            margin-top: 0.6rem;
            color: var(--accent);
            font-weight: 600;
            font-size: 0.9rem;
        }
        .feature-card .feature-body .feature-link i {
            transition: transform var(--transition);
        }
        .feature-card .feature-body .feature-link:hover i {
            transform: translateX(4px);
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacer-md);
            text-align: center;
        }
        .stat-item {
            background: var(--bg-white);
            padding: var(--spacer-md) var(--spacer-sm);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition);
        }
        .stat-item:hover {
            transform: translateY(-4px);
        }
        .stat-item .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-item .stat-label {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-top: 0.3rem;
        }
        .stat-item .stat-icon {
            font-size: 2rem;
            color: var(--secondary-light);
            margin-bottom: 0.5rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--secondary);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(26, 26, 46, 0.8);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-content {
            text-align: center;
            padding: var(--spacer-xl) 0;
            color: #fff;
            max-width: 640px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: 2.2rem;
            color: #fff;
            margin-bottom: 0.8rem;
        }
        .cta-content p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.1rem;
            margin-bottom: 1.8rem;
        }
        .cta-content .cta-btn {
            display: inline-block;
            padding: 0.9rem 2.4rem;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 1.05rem;
            border-radius: 50px;
            border: none;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .cta-content .cta-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(230, 57, 70, 0.35);
        }
        .cta-content .cta-sub {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-top: var(--spacer-sm);
            flex-wrap: wrap;
        }
        .cta-content .cta-sub input {
            padding: 0.7rem 1.4rem;
            border-radius: 50px;
            border: none;
            min-width: 240px;
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .cta-content .cta-sub input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }
        .cta-content .cta-sub button {
            padding: 0.7rem 1.8rem;
            border-radius: 50px;
            border: none;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            cursor: pointer;
            transition: background var(--transition);
        }
        .cta-content .cta-sub button:hover {
            background: var(--primary-dark);
        }

        /* ===== FAQ ===== */
        .faq-grid {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacer-sm);
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-item .faq-question {
            padding: 1.2rem 1.5rem;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-primary);
            background: var(--bg-white);
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-item .faq-question:hover {
            background: var(--bg-body);
        }
        .faq-item .faq-question i {
            transition: transform var(--transition);
            color: var(--text-light);
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 1.5rem 1.2rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-footer);
            color: rgba(255, 255, 255, 0.7);
            padding: var(--spacer-lg) 0 var(--spacer-md);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: var(--spacer-md);
            margin-bottom: var(--spacer-md);
        }
        .footer-brand .logo {
            font-size: 1.5rem;
            color: #fff;
            margin-bottom: 0.8rem;
        }
        .footer-brand .logo .logo-icon {
            width: 38px;
            height: 38px;
            font-size: 1.1rem;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 1rem;
            color: #fff;
            margin-bottom: 1rem;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            padding: 0.3rem 0;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: var(--spacer-md);
            display: flex;
            flex-direction: row;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--spacer-sm);
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== 响应式断点 ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-cards {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            :root {
                --spacer-xl: 3.5rem;
                --spacer-lg: 2.5rem;
                --spacer-md: 1.5rem;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .category-hero {
                min-height: 240px;
                padding: var(--spacer-lg) var(--spacer-sm);
            }
            .category-hero-content h1 {
                font-size: 2.2rem;
            }
            .category-hero-content p {
                font-size: 1rem;
            }
            .card-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacer-sm);
            }
            .rank-list {
                grid-template-columns: 1fr;
                gap: var(--spacer-sm);
            }
            .feature-cards {
                grid-template-columns: 1fr;
                gap: var(--spacer-sm);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacer-sm);
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacer-md);
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-content .cta-sub input {
                min-width: 180px;
            }
            .section-title h2 {
                font-size: 1.7rem;
            }
        }
        @media (max-width: 520px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .category-hero-content h1 {
                font-size: 1.8rem;
            }
            .filter-bar .filter-btn {
                font-size: 0.8rem;
                padding: 0.35rem 1rem;
            }
            .cta-content .cta-sub {
                flex-direction: column;
                align-items: center;
            }
            .cta-content .cta-sub input {
                width: 100%;
                min-width: unset;
            }
            .nav-main a {
                font-size: 0.95rem;
                padding: 0.6rem 0.8rem;
            }
            .logo {
                font-size: 1.3rem;
            }
            .logo .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: var(--spacer-sm);
        }
        .mt-2 {
            margin-top: var(--spacer-md);
        }
        .mb-1 {
            margin-bottom: var(--spacer-sm);
        }
        .mb-2 {
            margin-bottom: var(--spacer-md);
        }
        .gap-sm {
            gap: var(--spacer-sm);
        }
        .gap-md {
            gap: var(--spacer-md);
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }