/* roulang page: index */
/* ===== 设计变量 ===== */
    :root {
        --primary: #d32f2f;
        --primary-dark: #b71c1c;
        --primary-light: #ef5350;
        --secondary: #1565c0;
        --secondary-dark: #0d47a1;
        --secondary-light: #42a5f5;
        --accent: #ff8f00;
        --accent-light: #ffb300;
        --bg-dark: #0a0e1a;
        --bg-mid: #111827;
        --bg-card: #1a2035;
        --bg-card-hover: #232b45;
        --bg-light: #f5f7fc;
        --text-white: #ffffff;
        --text-light: #e0e4f0;
        --text-muted: #8899bb;
        --text-body: #1e2a3a;
        --border-color: rgba(255,255,255,0.08);
        --border-light: #e2e8f0;
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-lg: 20px;
        --radius-xl: 28px;
        --shadow-sm: 0 2px 8px rgba(0,0,0,0.12);
        --shadow-md: 0 8px 30px rgba(0,0,0,0.18);
        --shadow-lg: 0 20px 50px rgba(0,0,0,0.30);
        --shadow-glow: 0 0 30px rgba(211,47,47,0.25);
        --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
        --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --max-width: 1200px;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
        font-family: var(--font-sans);
        font-size: 16px;
        line-height: 1.7;
        color: var(--text-body);
        background: var(--bg-dark);
        -webkit-font-smoothing: antialiased;
        overflow-x: hidden;
    }
    a { color: inherit; text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--primary-light); }
    img { max-width: 100%; height: auto; display: block; }
    button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; }
    .container {
        width: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }
    @media (max-width: 768px) {
        .container { padding: 0 16px; }
    }

    /* ===== 辅助 ===== */
    .section-label {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(211,47,47,0.12);
        color: var(--primary-light);
        padding: 6px 16px;
        border-radius: 50px;
        font-size: 0.85rem;
        font-weight: 600;
        letter-spacing: 0.5px;
        margin-bottom: 16px;
        border: 1px solid rgba(211,47,47,0.20);
    }
    .section-title {
        font-size: 2.4rem;
        font-weight: 800;
        color: var(--text-white);
        margin-bottom: 16px;
        letter-spacing: -0.5px;
    }
    .section-sub {
        font-size: 1.1rem;
        color: var(--text-muted);
        max-width: 640px;
        line-height: 1.7;
    }
    @media (max-width: 768px) {
        .section-title { font-size: 1.8rem; }
        .section-sub { font-size: 1rem; }
    }

    .btn {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 14px 32px;
        border-radius: 50px;
        font-weight: 600;
        font-size: 1rem;
        cursor: pointer;
        transition: var(--transition);
        border: none;
        background: transparent;
        color: var(--text-white);
    }
    .btn-primary {
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        box-shadow: 0 4px 20px rgba(211,47,47,0.35);
    }
    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 30px rgba(211,47,47,0.50);
        color: #fff;
    }
    .btn-outline {
        border: 2px solid rgba(255,255,255,0.25);
        color: var(--text-white);
    }
    .btn-outline:hover {
        border-color: var(--primary-light);
        background: rgba(211,47,47,0.10);
        color: var(--primary-light);
    }
    .btn-secondary {
        background: var(--secondary);
        box-shadow: 0 4px 20px rgba(21,101,192,0.30);
    }
    .btn-secondary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 30px rgba(21,101,192,0.45);
        color: #fff;
    }
    .btn-sm {
        padding: 10px 22px;
        font-size: 0.9rem;
    }
    .btn:focus-visible {
        outline: 3px solid var(--accent);
        outline-offset: 3px;
    }

    /* ===== 导航 ===== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: rgba(10, 14, 26, 0.92);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        border-bottom: 1px solid var(--border-color);
        transition: var(--transition);
    }
    .site-header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 72px;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.5rem;
        font-weight: 800;
        color: var(--text-white);
        letter-spacing: -0.5px;
    }
    .logo-icon {
        width: 40px;
        height: 40px;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        color: #fff;
        font-weight: 900;
        box-shadow: 0 0 20px rgba(211,47,47,0.30);
    }
    .logo span { color: var(--primary-light); }

    .nav-list {
        display: flex;
        align-items: center;
        gap: 32px;
    }
    .nav-list a {
        color: var(--text-muted);
        font-size: 0.95rem;
        font-weight: 500;
        padding: 6px 0;
        position: relative;
        transition: var(--transition);
    }
    .nav-list a::after {
        content: '';
        position: absolute;
        bottom: -2px;
        left: 0;
        width: 0;
        height: 2px;
        background: var(--primary);
        border-radius: 2px;
        transition: var(--transition);
    }
    .nav-list a:hover { color: var(--text-white); }
    .nav-list a:hover::after { width: 100%; }
    .nav-list a.active {
        color: var(--text-white);
    }
    .nav-list a.active::after {
        width: 100%;
        background: var(--primary-light);
    }
    .nav-cta {
        background: var(--primary);
        color: #fff !important;
        padding: 10px 24px !important;
        border-radius: 50px;
        font-weight: 600;
    }
    .nav-cta::after { display: none !important; }
    .nav-cta:hover {
        background: var(--primary-dark) !important;
        transform: translateY(-1px);
        box-shadow: 0 4px 20px rgba(211,47,47,0.35);
    }

    .nav-toggle {
        display: none;
        background: none;
        border: none;
        color: var(--text-white);
        font-size: 1.6rem;
        cursor: pointer;
        padding: 4px;
    }
    @media (max-width: 768px) {
        .nav-toggle { display: block; }
        .nav-list {
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            background: rgba(10, 14, 26, 0.98);
            backdrop-filter: blur(18px);
            flex-direction: column;
            gap: 0;
            padding: 16px 24px 24px;
            border-bottom: 1px solid var(--border-color);
            transform: translateY(-110%);
            opacity: 0;
            pointer-events: none;
            transition: var(--transition);
        }
        .nav-list.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: all;
        }
        .nav-list a {
            padding: 14px 0;
            border-bottom: 1px solid var(--border-color);
            width: 100%;
        }
        .nav-list a:last-child { border-bottom: none; }
        .nav-cta {
            margin-top: 8px;
            text-align: center;
        }
    }

    /* ===== Hero 首屏 ===== */
    .hero {
        position: relative;
        min-height: 100vh;
        display: flex;
        align-items: center;
        padding-top: 72px;
        overflow: hidden;
    }
    .hero-bg {
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        z-index: 0;
    }
    .hero-bg::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(10,14,26,0.88) 30%, rgba(10,14,26,0.55) 70%, rgba(10,14,26,0.30) 100%);
        backdrop-filter: blur(2px);
    }
    .hero-overlay {
        position: absolute;
        inset: 0;
        background: radial-gradient(ellipse at 30% 50%, rgba(211,47,47,0.12) 0%, transparent 70%);
        z-index: 1;
    }
    .hero .container {
        position: relative;
        z-index: 2;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 60px;
        align-items: center;
        padding-top: 40px;
        padding-bottom: 60px;
    }
    .hero-content h1 {
        font-size: 3.6rem;
        font-weight: 900;
        color: var(--text-white);
        line-height: 1.15;
        letter-spacing: -1px;
        margin-bottom: 20px;
    }
    .hero-content h1 em {
        font-style: normal;
        background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .hero-content p {
        font-size: 1.2rem;
        color: var(--text-muted);
        max-width: 520px;
        margin-bottom: 32px;
        line-height: 1.8;
    }
    .hero-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 16px;
        margin-bottom: 40px;
    }
    .hero-stats {
        display: flex;
        gap: 40px;
        flex-wrap: wrap;
    }
    .hero-stat h3 {
        font-size: 2rem;
        font-weight: 800;
        color: var(--text-white);
        line-height: 1.2;
    }
    .hero-stat h3 small {
        font-size: 1rem;
        color: var(--primary-light);
        font-weight: 600;
    }
    .hero-stat p {
        font-size: 0.85rem;
        color: var(--text-muted);
        margin-top: 2px;
    }

    .hero-visual {
        position: relative;
        display: flex;
        justify-content: center;
        align-items: center;
    }
    .hero-card {
        background: rgba(255,255,255,0.04);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        padding: 32px;
        backdrop-filter: blur(12px);
        width: 100%;
        max-width: 440px;
        box-shadow: var(--shadow-lg);
    }
    .hero-card h4 {
        color: var(--text-white);
        font-size: 1.2rem;
        margin-bottom: 20px;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .hero-card h4 i { color: var(--primary-light); }
    .hero-form .form-group {
        margin-bottom: 18px;
    }
    .hero-form label {
        display: block;
        font-size: 0.85rem;
        color: var(--text-muted);
        margin-bottom: 6px;
        font-weight: 500;
    }
    .hero-form input {
        width: 100%;
        padding: 14px 18px;
        background: rgba(255,255,255,0.06);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-sm);
        color: var(--text-white);
        font-size: 0.95rem;
        transition: var(--transition);
    }
    .hero-form input::placeholder { color: rgba(255,255,255,0.25); }
    .hero-form input:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(211,47,47,0.15);
    }
    .hero-form .btn {
        width: 100%;
        justify-content: center;
        margin-top: 8px;
    }
    .hero-form .form-foot {
        text-align: center;
        margin-top: 14px;
        font-size: 0.85rem;
        color: var(--text-muted);
    }
    .hero-form .form-foot a {
        color: var(--primary-light);
        font-weight: 600;
    }
    .hero-form .form-foot a:hover { text-decoration: underline; }

    @media (max-width: 1024px) {
        .hero .container { grid-template-columns: 1fr; gap: 40px; }
        .hero-content h1 { font-size: 2.8rem; }
        .hero-visual { order: -1; }
        .hero-card { max-width: 100%; }
    }
    @media (max-width: 520px) {
        .hero-content h1 { font-size: 2.2rem; }
        .hero-stats { gap: 24px; }
        .hero-stat h3 { font-size: 1.6rem; }
    }

    /* ===== 板块通用 ===== */
    .section {
        padding: 90px 0;
    }
    .section-dark { background: var(--bg-dark); }
    .section-mid { background: var(--bg-mid); }
    .section-light { background: var(--bg-light); }
    .section-light .section-title { color: var(--text-body); }
    .section-light .section-sub { color: #4a5a7a; }
    .section-light .section-label { background: rgba(211,47,47,0.08); }

    .section-header {
        text-align: center;
        margin-bottom: 56px;
    }
    .section-header .section-sub {
        margin: 0 auto;
    }

    /* ===== 核心服务 ===== */
    .services-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 28px;
    }
    .service-card {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 32px 24px;
        text-align: center;
        transition: var(--transition);
    }
    .service-card:hover {
        transform: translateY(-6px);
        background: var(--bg-card-hover);
        border-color: rgba(211,47,47,0.20);
        box-shadow: var(--shadow-md);
    }
    .service-icon {
        width: 64px;
        height: 64px;
        border-radius: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 18px;
        font-size: 1.6rem;
        color: #fff;
    }
    .service-icon.red { background: linear-gradient(135deg, #d32f2f, #b71c1c); }
    .service-icon.blue { background: linear-gradient(135deg, #1565c0, #0d47a1); }
    .service-icon.gold { background: linear-gradient(135deg, #ff8f00, #e65100); }
    .service-icon.green { background: linear-gradient(135deg, #2e7d32, #1b5e20); }
    .service-card h3 {
        color: var(--text-white);
        font-size: 1.15rem;
        margin-bottom: 10px;
    }
    .service-card p {
        color: var(--text-muted);
        font-size: 0.9rem;
        line-height: 1.6;
    }
    @media (max-width: 1024px) {
        .services-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 520px) {
        .services-grid { grid-template-columns: 1fr; }
    }

    /* ===== 分类入口 ===== */
    .category-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .category-card {
        position: relative;
        border-radius: var(--radius-md);
        overflow: hidden;
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        transition: var(--transition);
        display: block;
    }
    .category-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
        border-color: rgba(211,47,47,0.20);
    }
    .category-card img {
        width: 100%;
        height: 180px;
        object-fit: cover;
    }
    .category-card .card-body {
        padding: 20px 22px 24px;
    }
    .category-card .card-body h3 {
        color: var(--text-white);
        font-size: 1.1rem;
        margin-bottom: 6px;
    }
    .category-card .card-body p {
        color: var(--text-muted);
        font-size: 0.85rem;
        line-height: 1.6;
    }
    .category-card .card-tag {
        display: inline-block;
        padding: 3px 12px;
        background: rgba(211,47,47,0.12);
        color: var(--primary-light);
        border-radius: 50px;
        font-size: 0.75rem;
        font-weight: 600;
        margin-top: 12px;
    }
    @media (max-width: 1024px) {
        .category-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 520px) {
        .category-grid { grid-template-columns: 1fr; }
    }

    /* ===== 资讯列表（CMS） ===== */
    .news-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
    }
    .news-card {
        display: flex;
        gap: 20px;
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 20px;
        transition: var(--transition);
    }
    .news-card:hover {
        background: var(--bg-card-hover);
        border-color: rgba(211,47,47,0.15);
        transform: translateY(-3px);
        box-shadow: var(--shadow-sm);
    }
    .news-card .news-img {
        width: 120px;
        min-height: 90px;
        border-radius: var(--radius-sm);
        object-fit: cover;
        flex-shrink: 0;
        background: var(--bg-mid);
    }
    .news-card .news-info {
        flex: 1;
        min-width: 0;
    }
    .news-card .news-info h4 {
        color: var(--text-white);
        font-size: 1rem;
        font-weight: 600;
        margin-bottom: 6px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-card .news-info p {
        color: var(--text-muted);
        font-size: 0.85rem;
        line-height: 1.6;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 8px;
    }
    .news-card .news-meta {
        display: flex;
        align-items: center;
        gap: 14px;
        font-size: 0.78rem;
        color: var(--text-muted);
    }
    .news-card .news-meta .badge {
        background: rgba(21,101,192,0.15);
        color: var(--secondary-light);
        padding: 2px 10px;
        border-radius: 50px;
        font-weight: 600;
    }
    .news-empty {
        grid-column: 1 / -1;
        text-align: center;
        padding: 48px 20px;
        color: var(--text-muted);
        font-size: 1.05rem;
        background: var(--bg-card);
        border-radius: var(--radius-md);
        border: 1px dashed var(--border-color);
    }
    @media (max-width: 768px) {
        .news-grid { grid-template-columns: 1fr; }
        .news-card { flex-direction: column; }
        .news-card .news-img { width: 100%; height: 160px; }
    }

    /* ===== 数据统计 ===== */
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 28px;
    }
    .stat-card {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 32px 20px;
        text-align: center;
        transition: var(--transition);
    }
    .stat-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
    }
    .stat-card .stat-num {
        font-size: 2.8rem;
        font-weight: 900;
        background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        line-height: 1.2;
        margin-bottom: 6px;
    }
    .stat-card .stat-label {
        color: var(--text-muted);
        font-size: 0.95rem;
        font-weight: 500;
    }
    @media (max-width: 768px) {
        .stats-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 520px) {
        .stats-grid { grid-template-columns: 1fr; }
        .stat-card .stat-num { font-size: 2.2rem; }
    }

    /* ===== 流程步骤 ===== */
    .steps-wrapper {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
        position: relative;
    }
    .steps-wrapper::before {
        content: '';
        position: absolute;
        top: 40px;
        left: 10%;
        right: 10%;
        height: 2px;
        background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
        opacity: 0.3;
        z-index: 0;
    }
    .step-item {
        position: relative;
        z-index: 1;
        text-align: center;
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 32px 20px 24px;
        transition: var(--transition);
    }
    .step-item:hover {
        background: var(--bg-card-hover);
        transform: translateY(-4px);
    }
    .step-num {
        width: 48px;
        height: 48px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 16px;
        font-weight: 800;
        font-size: 1.2rem;
        color: #fff;
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        box-shadow: 0 0 20px rgba(211,47,47,0.25);
    }
    .step-item h4 {
        color: var(--text-white);
        font-size: 1.05rem;
        margin-bottom: 8px;
    }
    .step-item p {
        color: var(--text-muted);
        font-size: 0.85rem;
        line-height: 1.6;
    }
    @media (max-width: 768px) {
        .steps-wrapper { grid-template-columns: repeat(2, 1fr); }
        .steps-wrapper::before { display: none; }
    }
    @media (max-width: 520px) {
        .steps-wrapper { grid-template-columns: 1fr; }
    }

    /* ===== FAQ ===== */
    .faq-list {
        max-width: 800px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .faq-item {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-sm);
        overflow: hidden;
        transition: var(--transition);
    }
    .faq-item:hover {
        border-color: rgba(211,47,47,0.15);
    }
    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 18px 24px;
        cursor: pointer;
        color: var(--text-white);
        font-weight: 600;
        font-size: 1rem;
        transition: var(--transition);
        background: transparent;
        border: none;
        width: 100%;
        text-align: left;
    }
    .faq-question i {
        color: var(--text-muted);
        transition: var(--transition);
        font-size: 0.9rem;
    }
    .faq-item.open .faq-question i {
        transform: rotate(180deg);
        color: var(--primary-light);
    }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.4s ease;
        padding: 0 24px;
        color: var(--text-muted);
        font-size: 0.92rem;
        line-height: 1.7;
    }
    .faq-item.open .faq-answer {
        max-height: 300px;
        padding: 0 24px 20px;
    }

    /* ===== CTA ===== */
    .cta-section {
        background: linear-gradient(135deg, var(--bg-mid), #0d1a2e);
        border-top: 1px solid var(--border-color);
        border-bottom: 1px solid var(--border-color);
    }
    .cta-box {
        text-align: center;
        padding: 60px 20px;
    }
    .cta-box h2 {
        font-size: 2.2rem;
        color: var(--text-white);
        margin-bottom: 16px;
    }
    .cta-box p {
        color: var(--text-muted);
        font-size: 1.05rem;
        max-width: 520px;
        margin: 0 auto 28px;
    }
    .cta-box .btn-group {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
    }

    /* ===== 页脚 ===== */
    .site-footer {
        background: var(--bg-dark);
        border-top: 1px solid var(--border-color);
        padding: 60px 0 30px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
        margin-bottom: 40px;
    }
    .footer-brand .logo {
        font-size: 1.3rem;
        margin-bottom: 14px;
    }
    .footer-brand p {
        color: var(--text-muted);
        font-size: 0.9rem;
        line-height: 1.7;
        max-width: 320px;
    }
    .footer-col h5 {
        color: var(--text-white);
        font-size: 0.95rem;
        font-weight: 700;
        margin-bottom: 16px;
    }
    .footer-col a {
        display: block;
        color: var(--text-muted);
        font-size: 0.88rem;
        padding: 4px 0;
        transition: var(--transition);
    }
    .footer-col a:hover {
        color: var(--primary-light);
        padding-left: 4px;
    }
    .footer-bottom {
        border-top: 1px solid var(--border-color);
        padding-top: 24px;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: center;
        gap: 12px;
    }
    .footer-bottom p {
        color: var(--text-muted);
        font-size: 0.82rem;
    }
    .footer-bottom a {
        color: var(--text-muted);
        font-size: 0.82rem;
    }
    .footer-bottom a:hover { color: var(--primary-light); }
    .footer-social {
        display: flex;
        gap: 16px;
    }
    .footer-social a {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        border: 1px solid var(--border-color);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text-muted);
        transition: var(--transition);
    }
    .footer-social a:hover {
        border-color: var(--primary);
        color: var(--primary-light);
        background: rgba(211,47,47,0.08);
    }
    @media (max-width: 768px) {
        .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
        .footer-brand { grid-column: 1 / -1; }
    }
    @media (max-width: 520px) {
        .footer-grid { grid-template-columns: 1fr; }
        .footer-bottom { flex-direction: column; text-align: center; }
    }

    /* ===== 移动端微调 ===== */
    @media (max-width: 480px) {
        .hero-content h1 { font-size: 1.9rem; }
        .btn { padding: 12px 24px; font-size: 0.9rem; }
        .section { padding: 60px 0; }
        .section-title { font-size: 1.5rem; }
    }

/* roulang page: article */
/* ===== 设计变量 ===== */
:root {
    --primary: #1a73e8;
    --primary-dark: #0d47a1;
    --primary-light: #e8f0fe;
    --accent: #ff6d00;
    --accent-light: #fff3e0;
    --bg: #f5f7fa;
    --bg-white: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    --max-width: 1200px;
    --header-h: 72px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
    padding-top: var(--header-h);
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }

/* ===== 容器 ===== */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Header / 导航 ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-h);
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: var(--transition);
}
.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}
.logo {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 22px;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.5px;
}
.logo .logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 18px;
    font-weight: 800;
}
.logo span { color: var(--primary); font-weight: 700; }
.logo:hover { color: var(--text); }
.nav-toggle { display: none; background: none; font-size: 24px; color: var(--text); cursor: pointer; padding: 8px; border-radius: var(--radius-sm); transition: var(--transition); }
.nav-toggle:hover { background: var(--border-light); }
.nav-list { display: flex; align-items: center; gap: 4px; }
.nav-list a {
    display: block;
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}
.nav-list a:hover { color: var(--primary); background: var(--primary-light); }
.nav-list a.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
.nav-list a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}
.nav-list a.nav-cta {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    padding: 8px 22px;
    border-radius: 50px;
    font-weight: 600;
    margin-left: 8px;
    box-shadow: 0 4px 12px rgba(26,115,232,0.3);
}
.nav-list a.nav-cta i { margin-right: 6px; }
.nav-list a.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26,115,232,0.4); color: #fff; background: linear-gradient(135deg, var(--primary-dark), #0b3d91); }

/* ===== 文章 Banner ===== */
.article-banner {
    position: relative;
    padding: 60px 0 40px;
    background: linear-gradient(135deg, #0d1b2a 0%, #1b2a3a 50%, #0d1b2a 100%);
    overflow: hidden;
}
.article-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
    opacity: 0.15;
    mix-blend-mode: overlay;
}
.article-banner .container { position: relative; z-index: 2; }
.article-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    margin-bottom: 24px;
    flex-wrap: wrap;
}
.article-breadcrumb a { color: rgba(255,255,255,0.7); }
.article-breadcrumb a:hover { color: #fff; }
.article-breadcrumb .sep { color: rgba(255,255,255,0.4); }
.article-breadcrumb .current { color: rgba(255,255,255,0.9); font-weight: 500; }
.article-banner h1 {
    font-size: 36px;
    font-weight: 800;
    color: #fff;
    line-height: 1.25;
    max-width: 800px;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px 24px;
    font-size: 14px;
    color: rgba(255,255,255,0.65);
}
.article-meta .meta-item { display: flex; align-items: center; gap: 6px; }
.article-meta .meta-item i { font-size: 14px; }
.article-meta .category-badge {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: 50px;
    font-size: 13px;
    color: #fff;
    font-weight: 500;
}

/* ===== 文章内容区 ===== */
.article-main {
    padding: 40px 0 60px;
}
.article-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 40px;
    align-items: start;
}
.article-body {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 40px 44px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}
.article-body .featured-image {
    width: 100%;
    border-radius: var(--radius-sm);
    margin-bottom: 32px;
    max-height: 460px;
    object-fit: cover;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}
.article-body .content {
    font-size: 16.5px;
    line-height: 1.85;
    color: var(--text);
}
.article-body .content p { margin-bottom: 1.2em; }
.article-body .content h2 { font-size: 24px; margin: 1.6em 0 0.6em; color: var(--text); }
.article-body .content h3 { font-size: 20px; margin: 1.4em 0 0.5em; color: var(--text); }
.article-body .content ul, .article-body .content ol { margin: 0.8em 0; padding-left: 1.6em; }
.article-body .content ul { list-style: disc; }
.article-body .content ol { list-style: decimal; }
.article-body .content li { margin-bottom: 0.4em; }
.article-body .content a { color: var(--primary); text-decoration: underline; }
.article-body .content blockquote {
    margin: 1.2em 0;
    padding: 16px 24px;
    background: var(--primary-light);
    border-left: 4px solid var(--primary);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text);
    font-style: normal;
}
.article-body .content img { border-radius: var(--radius-sm); margin: 1.2em 0; box-shadow: var(--shadow-sm); }
.article-body .content code {
    background: var(--border-light);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.9em;
}
.article-body .content pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: 20px 24px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: 1.2em 0;
    font-size: 14px;
}
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.article-tags .tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--border-light);
    border-radius: 50px;
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
}
.article-tags .tag:hover { background: var(--primary-light); color: var(--primary); }
.article-share {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}
.article-share span { font-size: 14px; color: var(--text-secondary); font-weight: 500; }
.article-share a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--border-light);
    color: var(--text-secondary);
    font-size: 16px;
    transition: var(--transition);
}
.article-share a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

/* ===== 侧边栏 ===== */
.article-sidebar {
    display: flex;
    flex-direction: column;
    gap: 28px;
}
.sidebar-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 24px 28px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}
.sidebar-card h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.sidebar-card h4 i { color: var(--primary); font-size: 18px; }
.sidebar-related-list .related-item {
    display: flex;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-light);
    align-items: flex-start;
}
.sidebar-related-list .related-item:last-child { border-bottom: none; padding-bottom: 0; }
.sidebar-related-list .related-img {
    width: 72px;
    height: 54px;
    border-radius: 6px;
    object-fit: cover;
    flex-shrink: 0;
    background: var(--border-light);
}
.sidebar-related-list .related-info { flex: 1; min-width: 0; }
.sidebar-related-list .related-info a {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    line-height: 1.4;
    margin-bottom: 4px;
    transition: var(--transition);
}
.sidebar-related-list .related-info a:hover { color: var(--primary); }
.sidebar-related-list .related-info .date {
    font-size: 12px;
    color: var(--text-light);
}
.sidebar-cat-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0;
    font-size: 14px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition);
}
.sidebar-cat-list a:hover { color: var(--primary); padding-left: 6px; }
.sidebar-cat-list a span {
    background: var(--border-light);
    padding: 2px 10px;
    border-radius: 50px;
    font-size: 12px;
    color: var(--text-light);
}
.sidebar-cta {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    text-align: center;
    padding: 28px 24px;
    border: none;
}
.sidebar-cta h4 { color: #fff; justify-content: center; }
.sidebar-cta h4 i { color: rgba(255,255,255,0.8); }
.sidebar-cta p { font-size: 14px; color: rgba(255,255,255,0.8); margin-bottom: 16px; }
.sidebar-cta .btn-ghost {
    display: inline-block;
    padding: 10px 28px;
    border: 2px solid rgba(255,255,255,0.5);
    border-radius: 50px;
    color: #fff;
    font-weight: 600;
    font-size: 14px;
    transition: var(--transition);
}
.sidebar-cta .btn-ghost:hover { background: rgba(255,255,255,0.15); border-color: #fff; color: #fff; }

/* ===== 相关文章区域 ===== */
.related-section {
    padding: 50px 0 60px;
    background: var(--bg-white);
    border-top: 1px solid var(--border);
}
.related-section .section-title {
    font-size: 26px;
    font-weight: 800;
    text-align: center;
    margin-bottom: 8px;
}
.related-section .section-sub {
    text-align: center;
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: 36px;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.related-card {
    background: var(--bg);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.related-card img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    border-radius: 0;
}
.related-card .card-body { padding: 18px 20px 20px; }
.related-card .card-body .cat {
    font-size: 12px;
    color: var(--primary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}
.related-card .card-body h5 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.related-card .card-body h5 a { color: var(--text); }
.related-card .card-body h5 a:hover { color: var(--primary); }
.related-card .card-body .date { font-size: 13px; color: var(--text-light); }

/* ===== 内容未找到 ===== */
.not-found-wrap {
    text-align: center;
    padding: 80px 20px;
    background: var(--bg-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}
.not-found-wrap .icon-big {
    font-size: 64px;
    color: var(--text-light);
    margin-bottom: 20px;
}
.not-found-wrap h2 { font-size: 28px; margin-bottom: 12px; }
.not-found-wrap p { color: var(--text-secondary); margin-bottom: 24px; font-size: 16px; }
.not-found-wrap .btn-back {
    display: inline-block;
    padding: 12px 32px;
    background: var(--primary);
    color: #fff;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
}
.not-found-wrap .btn-back:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26,115,232,0.3); }

/* ===== Footer ===== */
.site-footer {
    background: #0f172a;
    color: rgba(255,255,255,0.7);
    padding: 56px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 36px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo { color: #fff; margin-bottom: 12px; }
.footer-brand .logo span { color: #60a5fa; }
.footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 360px; }
.footer-col h5 {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: 0.3px;
}
.footer-col a {
    display: block;
    padding: 5px 0;
    font-size: 14px;
    color: rgba(255,255,255,0.55);
    transition: var(--transition);
}
.footer-col a:hover { color: #60a5fa; padding-left: 4px; }
.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
    font-size: 13px;
    color: rgba(255,255,255,0.4);
    flex-wrap: wrap;
    gap: 12px;
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: #60a5fa; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
    color: rgba(255,255,255,0.5);
    font-size: 16px;
    transition: var(--transition);
}
.footer-social a:hover { background: rgba(255,255,255,0.12); color: #60a5fa; transform: translateY(-2px); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .article-layout { grid-template-columns: 1fr; }
    .article-sidebar { display: grid; grid-template-columns: repeat(2, 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-h: 64px; }
    .container { padding: 0 16px; }
    .nav-toggle { display: block; }
    .nav-list {
        position: fixed;
        top: var(--header-h);
        left: 0;
        width: 100%;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        flex-direction: column;
        padding: 16px 24px 24px;
        gap: 4px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow);
        transform: translateY(-120%);
        opacity: 0;
        transition: var(--transition);
        pointer-events: none;
    }
    .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
    .nav-list a { width: 100%; padding: 12px 16px; font-size: 16px; }
    .nav-list a.active::after { display: none; }
    .nav-list a.nav-cta { margin-left: 0; text-align: center; }
    .article-banner { padding: 40px 0 32px; }
    .article-banner h1 { font-size: 24px; }
    .article-meta { gap: 10px 16px; font-size: 13px; }
    .article-body { padding: 24px 20px; }
    .article-body .content { font-size: 15.5px; }
    .article-sidebar { grid-template-columns: 1fr; }
    .related-grid { grid-template-columns: 1fr; }
    .related-card img { height: 140px; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .sidebar-card { padding: 20px; }
}

@media (max-width: 520px) {
    .article-banner h1 { font-size: 20px; }
    .article-body { padding: 16px 14px; }
    .article-body .content { font-size: 15px; }
    .article-meta .meta-item { font-size: 12px; }
    .logo { font-size: 18px; }
    .logo .logo-icon { width: 30px; height: 30px; font-size: 15px; }
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0a1628;
            --primary-light: #1a2d4a;
            --primary-dark: #050d1a;
            --accent: #f0b90b;
            --accent-hover: #d4a309;
            --accent-soft: #fef3c7;
            --bg-body: #f5f7fa;
            --bg-card: #ffffff;
            --bg-alt: #eef1f5;
            --text-main: #1a1a2e;
            --text-muted: #6b7280;
            --text-light: #9ca3af;
            --border: #e5e7eb;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(10, 22, 40, 0.06);
            --shadow-md: 0 6px 24px rgba(10, 22, 40, 0.10);
            --shadow-lg: 0 16px 48px rgba(10, 22, 40, 0.14);
            --transition: 0.28s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
            --header-h: 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-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-main);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            transition: all var(--transition);
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--primary);
        }

        h1 {
            font-size: 2.6rem;
        }
        h2 {
            font-size: 2.0rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.15rem;
        }
        h5 {
            font-size: 1rem;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(10, 22, 40, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(240, 185, 11, 0.15);
            height: var(--header-h);
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.5rem;
            font-weight: 800;
            color: #ffffff;
            letter-spacing: -0.5px;
            white-space: nowrap;
        }

        .logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--accent);
            color: var(--primary);
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
            font-weight: 900;
        }

        .logo span {
            color: var(--accent);
            font-weight: 600;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-list a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            font-size: 0.92rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }

        .nav-list a:hover {
            color: #ffffff;
            background: rgba(240, 185, 11, 0.12);
        }

        .nav-list a.active {
            color: var(--accent);
            background: rgba(240, 185, 11, 0.15);
        }

        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }

        .nav-list .nav-cta {
            background: var(--accent);
            color: var(--primary);
            font-weight: 700;
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            margin-left: 8px;
        }

        .nav-list .nav-cta:hover {
            background: var(--accent-hover);
            color: var(--primary);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(240, 185, 11, 0.35);
        }

        .nav-toggle {
            display: none;
            color: #ffffff;
            font-size: 1.4rem;
            padding: 6px 10px;
            background: transparent;
            border-radius: var(--radius-sm);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            padding: 100px 0 80px;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center 30%;
            background-blend-mode: overlay;
            min-height: 380px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 22, 40, 0.88) 0%, rgba(10, 22, 40, 0.60) 100%);
            z-index: 1;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .category-hero h1 {
            color: #ffffff;
            font-size: 3.2rem;
            font-weight: 900;
            letter-spacing: -1px;
            margin-bottom: 16px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }

        .category-hero h1 .highlight {
            color: var(--accent);
        }

        .category-hero p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.15rem;
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .category-hero .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
        }

        .category-hero .hero-tags span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.10);
            backdrop-filter: blur(4px);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.90);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .category-hero .hero-tags span i {
            color: var(--accent);
        }

        /* ===== Section Shared ===== */
        .section {
            padding: 72px 0;
        }

        .section-alt {
            background: var(--bg-alt);
        }

        .section-dark {
            background: var(--primary);
            color: #ffffff;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header h2 {
            margin-bottom: 12px;
        }

        .section-header p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
            font-size: 1.05rem;
        }

        .section-header .section-badge {
            display: inline-block;
            padding: 4px 16px;
            background: var(--accent-soft);
            color: var(--accent-hover);
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 12px;
            border: 1px solid rgba(240, 185, 11, 0.20);
        }

        .section-dark .section-header h2 {
            color: #ffffff;
        }
        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.70);
        }
        .section-dark .section-header .section-badge {
            background: rgba(240, 185, 11, 0.18);
            color: var(--accent);
            border-color: rgba(240, 185, 11, 0.25);
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid var(--border);
        }

        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(240, 185, 11, 0.25);
        }

        .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            background: var(--bg-alt);
        }

        .card-body {
            padding: 22px 24px 26px;
        }

        .card-body h3 {
            font-size: 1.2rem;
            margin-bottom: 8px;
        }

        .card-body p {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.6;
            margin-bottom: 12px;
        }

        .card-body .card-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }

        .card-body .card-meta i {
            margin-right: 4px;
        }

        .card-body .card-tag {
            display: inline-block;
            padding: 2px 12px;
            background: var(--accent-soft);
            color: var(--accent-hover);
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        .card-body .btn-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            color: var(--accent-hover);
            font-size: 0.9rem;
        }

        .card-body .btn-link:hover {
            gap: 10px;
            color: var(--accent);
        }

        /* ===== Grid ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 32px;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            border: 2px solid transparent;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            border-color: var(--accent);
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(240, 185, 11, 0.35);
        }

        .btn-outline-light {
            background: transparent;
            color: #ffffff;
            border-color: rgba(255, 255, 255, 0.30);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: #ffffff;
            transform: translateY(-2px);
        }

        .btn-lg {
            padding: 16px 40px;
            font-size: 1.05rem;
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius);
            padding: 32px 20px;
            text-align: center;
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(4px);
            transition: all var(--transition);
        }

        .stat-card:hover {
            background: rgba(255, 255, 255, 0.10);
            transform: translateY(-4px);
            border-color: rgba(240, 185, 11, 0.25);
        }

        .stat-card .stat-num {
            font-size: 2.6rem;
            font-weight: 900;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-card .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.70);
        }

        .stat-card .stat-icon {
            font-size: 1.8rem;
            color: rgba(240, 185, 11, 0.30);
            margin-bottom: 12px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(240, 185, 11, 0.20);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            background: transparent;
            width: 100%;
            text-align: left;
            color: var(--text-main);
        }

        .faq-question i {
            color: var(--accent);
            transition: transform var(--transition);
            font-size: 1.1rem;
        }

        .faq-question.open i {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
            display: none;
        }

        .faq-answer.open {
            display: block;
        }

        .section-dark .faq-item {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.08);
        }

        .section-dark .faq-question {
            color: #ffffff;
        }

        .section-dark .faq-answer {
            color: rgba(255, 255, 255, 0.70);
        }

        /* ===== CTA ===== */
        .cta-block {
            text-align: center;
            padding: 0 20px;
        }

        .cta-block h2 {
            font-size: 2.2rem;
            margin-bottom: 16px;
        }

        .cta-block p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 580px;
            margin: 0 auto 32px;
        }

        .cta-block .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.80);
            padding: 56px 0 28px;
            border-top: 1px solid rgba(240, 185, 11, 0.08);
        }

        .site-footer .logo {
            color: #ffffff;
            margin-bottom: 16px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h5 {
            color: #ffffff;
            font-weight: 700;
            margin-bottom: 16px;
            font-size: 1rem;
        }

        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: all var(--transition);
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.40);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.50);
        }

        .footer-bottom a:hover {
            color: var(--accent);
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.50);
            font-size: 1rem;
            transition: all var(--transition);
        }

        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .category-hero h1 {
                font-size: 2.6rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }
            .nav-list {
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(10, 22, 40, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 20px;
                border-bottom: 1px solid rgba(240, 185, 11, 0.10);
                gap: 4px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.30);
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list a {
                padding: 12px 16px;
                font-size: 1rem;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-list a.active::after {
                display: none;
            }
            .nav-list .nav-cta {
                margin-left: 0;
                margin-top: 6px;
                justify-content: center;
            }
            .nav-toggle {
                display: block;
            }
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .grid-2 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 12px;
                text-align: center;
            }
            .category-hero {
                padding: 72px 0 56px;
                min-height: 300px;
            }
            .category-hero h1 {
                font-size: 2.0rem;
            }
            .section {
                padding: 48px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .cta-block h2 {
                font-size: 1.6rem;
            }
            .stat-card .stat-num {
                font-size: 2.0rem;
            }
            .container {
                padding: 0 16px;
            }
        }

        @media (max-width: 520px) {
            .grid-3 {
                grid-template-columns: 1fr;
            }
            .grid-4 {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .category-hero p {
                font-size: 0.95rem;
            }
            .category-hero .hero-tags span {
                font-size: 0.75rem;
                padding: 4px 12px;
            }
            .btn-lg {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .logo {
                font-size: 1.2rem;
            }
            .logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: 14px 18px;
            }
            .faq-answer {
                padding: 0 18px 14px;
                font-size: 0.85rem;
            }
        }

        /* ===== Focus / Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Misc ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .badge-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            background: var(--accent-soft);
            color: var(--accent-hover);
            border-radius: 40px;
            font-size: 0.78rem;
            font-weight: 600;
            border: 1px solid rgba(240, 185, 11, 0.15);
        }

        .badge i {
            margin-right: 4px;
            font-size: 0.7rem;
        }

        .divider {
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 12px auto 20px;
        }