/* roulang page: index */
/* ========== 设计变量 ========== */
    :root {
        --primary-950: #0a1028;
        --primary-900: #0e1a38;
        --primary-800: #142450;
        --primary-700: #1b3168;
        --primary-600: #244084;
        --accent-500: #f59e0b;
        --accent-600: #d97706;
        --accent-400: #fbbf24;
        --cyan-400: #22d3ee;
        --cyan-500: #06b6d4;
        --bg-body: #f0f4fa;
        --bg-white: #ffffff;
        --bg-soft: #f8fafc;
        --text-dark: #0f172a;
        --text-main: #1e293b;
        --text-muted: #5a6a85;
        --border-line: #dee5ed;
        --radius-lg: 24px;
        --radius-md: 16px;
        --radius-sm: 10px;
        --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.05), 0 10px 30px rgba(0, 0, 0, 0.05);
        --shadow-hover: 0 4px 12px rgba(0, 0, 0, 0.06), 0 18px 44px rgba(0, 0, 0, 0.10);
        --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --container: 1200px;
    }

    /* ========== 基础 Reset / Base ========== */
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
    }
    body {
        font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        font-size: 16px;
        line-height: 1.75;
        color: var(--text-main);
        background-color: var(--bg-body);
        -webkit-font-smoothing: antialiased;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: var(--transition);
    }
    img {
        max-width: 100%;
        display: block;
    }
    button,
    input {
        font-family: inherit;
        font-size: 100%;
        border: none;
        outline: none;
        background: none;
    }
    ul,
    ol {
        list-style: none;
    }
    .container {
        max-width: var(--container);
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ========== 按钮 ========== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 28px;
        border-radius: 50px;
        font-size: 15px;
        font-weight: 600;
        line-height: 1.4;
        cursor: pointer;
        transition: var(--transition);
        border: 2px solid transparent;
        white-space: nowrap;
    }
    .btn-primary {
        background: var(--accent-500);
        color: #0f172a;
        box-shadow: 0 4px 16px rgba(245, 158, 11, 0.35);
    }
    .btn-primary:hover {
        background: var(--accent-600);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 8px 28px rgba(217, 119, 6, 0.40);
    }
    .btn-outline {
        border-color: rgba(255, 255, 255, 0.65);
        color: #fff;
        background: rgba(255, 255, 255, 0.08);
        backdrop-filter: blur(6px);
    }
    .btn-outline:hover {
        background: rgba(255, 255, 255, 0.18);
        border-color: #fff;
        transform: translateY(-2px);
    }
    .btn-white {
        background: #fff;
        color: var(--primary-800);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    }
    .btn-white:hover {
        background: var(--accent-500);
        color: #0f172a;
        transform: translateY(-2px);
        box-shadow: 0 8px 30px rgba(245, 158, 11, 0.30);
    }
    .btn-sm {
        padding: 8px 18px;
        font-size: 13px;
    }

    /* ========== 徽章 / 标签 ========== */
    .badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 6px 16px;
        border-radius: 50px;
        font-size: 13px;
        font-weight: 600;
        background: rgba(34, 211, 238, 0.15);
        color: var(--cyan-500);
        border: 1px solid rgba(34, 211, 238, 0.25);
        backdrop-filter: blur(4px);
    }
    .badge-warning {
        background: rgba(245, 158, 11, 0.15);
        color: var(--accent-600);
        border-color: rgba(245, 158, 11, 0.25);
    }
    .tag {
        display: inline-block;
        padding: 3px 12px;
        border-radius: 50px;
        font-size: 12px;
        font-weight: 500;
        background: rgba(37, 99, 235, 0.08);
        color: #2563eb;
        transition: var(--transition);
    }
    .tag:hover {
        background: rgba(37, 99, 235, 0.14);
    }
    .tag-accent {
        background: rgba(245, 158, 11, 0.10);
        color: var(--accent-600);
    }

    /* ========== 导航 ========== */
    .site-header {
        background: linear-gradient(180deg, var(--primary-950) 0%, var(--primary-900) 100%);
        position: sticky;
        top: 0;
        z-index: 100;
        box-shadow: 0 2px 24px rgba(0, 0, 0, 0.25);
    }
    .nav-panel {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 20px;
        padding: 14px 0;
        flex-wrap: wrap;
    }
    .nav-logo {
        font-size: 20px;
        font-weight: 800;
        color: #fff;
        letter-spacing: 0.5px;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .nav-logo i {
        background: var(--accent-500);
        color: #0f172a;
        width: 34px;
        height: 34px;
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        font-style: normal;
        font-weight: 900;
    }
    .nav-links {
        display: flex;
        align-items: center;
        gap: 8px;
        background: rgba(255, 255, 255, 0.06);
        border: 1px solid rgba(255, 255, 255, 0.08);
        padding: 6px;
        border-radius: 50px;
        backdrop-filter: blur(6px);
    }
    .nav-item {
        padding: 8px 22px;
        border-radius: 50px;
        font-size: 14px;
        font-weight: 500;
        color: rgba(255, 255, 255, 0.75);
        transition: var(--transition);
        display: block;
    }
    .nav-item:hover {
        color: #fff;
        background: rgba(255, 255, 255, 0.10);
    }
    .nav-item.active {
        background: var(--accent-500);
        color: #0f172a;
        font-weight: 700;
        box-shadow: 0 2px 12px rgba(245, 158, 11, 0.4);
    }
    .nav-cta {
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .nav-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        background: rgba(255, 255, 255, 0.08);
        border-radius: 8px;
        padding: 10px 12px;
        cursor: pointer;
        border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .nav-toggle span {
        width: 20px;
        height: 2px;
        background: #fff;
        border-radius: 2px;
        display: block;
        transition: var(--transition);
    }

    /* ========== Hero ========== */
    .hero {
        position: relative;
        background: linear-gradient(135deg, var(--primary-950) 0%, var(--primary-800) 55%, var(--primary-700) 100%);
        overflow: hidden;
        padding: 100px 0 80px;
    }
    .hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background-image: url('/assets/images/backpic/back-1.png');
        background-size: cover;
        background-position: center;
        opacity: 0.25;
        mix-blend-mode: overlay;
    }
    .hero::after {
        content: "";
        position: absolute;
        inset: 0;
        background: radial-gradient(ellipse at 80% 20%, rgba(34, 211, 238, 0.2), transparent 60%);
        pointer-events: none;
    }
    .hero-inner {
        position: relative;
        z-index: 2;
        display: grid;
        grid-template-columns: 1.2fr 0.8fr;
        gap: 60px;
        align-items: center;
    }
    .hero-content .badge {
        margin-bottom: 24px;
    }
    .hero-content h1 {
        font-size: 52px;
        line-height: 1.2;
        color: #fff;
        font-weight: 900;
        letter-spacing: 1px;
        margin-bottom: 18px;
        text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
    }
    .hero-content h1 span {
        color: var(--accent-400);
    }
    .hero-content .subtitle {
        font-size: 18px;
        color: rgba(255, 255, 255, 0.85);
        line-height: 1.7;
        margin-bottom: 28px;
        max-width: 420px;
    }
    .hero-actions {
        display: flex;
        gap: 14px;
        flex-wrap: wrap;
    }
    .hero-metrics {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    .metric-card {
        background: rgba(255, 255, 255, 0.08);
        border: 1px solid rgba(255, 255, 255, 0.14);
        border-radius: var(--radius-md);
        padding: 24px 20px;
        backdrop-filter: blur(10px);
        transition: var(--transition);
        text-align: center;
    }
    .metric-card:hover {
        background: rgba(255, 255, 255, 0.14);
        transform: translateY(-4px);
        box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2);
    }
    .metric-card .num {
        font-size: 36px;
        font-weight: 900;
        color: #fff;
        line-height: 1.2;
        display: block;
    }
    .metric-card .label {
        font-size: 13px;
        color: rgba(255, 255, 255, 0.7);
        margin-top: 6px;
        display: block;
    }
    .metric-card .num em {
        font-style: normal;
        color: var(--accent-400);
        font-size: 20px;
        font-weight: 700;
    }

    /* ========== 通用板块 ========== */
    .section {
        padding: 90px 0;
    }
    .section.soft {
        background: var(--bg-soft);
    }
    .section-head {
        text-align: center;
        max-width: 700px;
        margin: 0 auto 56px;
    }
    .section-head .eyebrow {
        display: inline-block;
        font-size: 13px;
        font-weight: 700;
        letter-spacing: 1px;
        text-transform: uppercase;
        color: var(--accent-600);
        margin-bottom: 10px;
    }
    .section-head h2 {
        font-size: 36px;
        font-weight: 800;
        color: var(--text-dark);
        line-height: 1.3;
        margin-bottom: 14px;
    }
    .section-head p {
        font-size: 16px;
        color: var(--text-muted);
        line-height: 1.6;
    }

    /* ========== 统计栏 ========== */
    .stats-bar {
        background: var(--bg-white);
        border-bottom: 1px solid var(--border-line);
        padding: 36px 0;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    }
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 30px;
    }
    .stat-item {
        text-align: center;
        padding: 10px;
    }
    .stat-item .num {
        font-size: 40px;
        font-weight: 900;
        color: var(--primary-800);
        line-height: 1.1;
        display: block;
    }
    .stat-item .num span {
        font-size: 20px;
        color: var(--accent-500);
    }
    .stat-item .label {
        font-size: 14px;
        color: var(--text-muted);
        margin-top: 8px;
        display: block;
        letter-spacing: 0.5px;
    }

    /* ========== 功能卡 ========== */
    .feature-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }
    .feature-card {
        background: var(--bg-white);
        border: 1px solid var(--border-line);
        border-radius: var(--radius-lg);
        padding: 32px 26px;
        transition: var(--transition);
        position: relative;
        overflow: hidden;
    }
    .feature-card::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 3px;
        background: linear-gradient(90deg, var(--accent-500), var(--cyan-400));
        opacity: 0;
        transition: var(--transition);
    }
    .feature-card:hover {
        border-color: transparent;
        box-shadow: var(--shadow-hover);
        transform: translateY(-6px);
    }
    .feature-card:hover::before {
        opacity: 1;
    }
    .feature-icon {
        width: 56px;
        height: 56px;
        border-radius: 14px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 24px;
        font-weight: 800;
        margin-bottom: 20px;
        background: rgba(37, 99, 235, 0.10);
        color: #2563eb;
    }
    .feature-card:nth-child(2) .feature-icon {
        background: rgba(245, 158, 11, 0.12);
        color: var(--accent-600);
    }
    .feature-card:nth-child(3) .feature-icon {
        background: rgba(34, 211, 238, 0.12);
        color: var(--cyan-500);
    }
    .feature-card:nth-child(4) .feature-icon {
        background: rgba(16, 185, 129, 0.12);
        color: #10b981;
    }
    .feature-card h3 {
        font-size: 18px;
        font-weight: 700;
        color: var(--text-dark);
        margin-bottom: 10px;
    }
    .feature-card p {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.6;
    }

    /* ========== 登录方式 ========== */
    .login-methods {
        padding: 90px 0;
    }
    .method-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .method-card {
        background: var(--bg-white);
        border-radius: var(--radius-lg);
        border: 1px solid var(--border-line);
        padding: 36px 30px;
        text-align: center;
        transition: var(--transition);
        position: relative;
    }
    .method-card:hover {
        box-shadow: var(--shadow-hover);
        transform: translateY(-5px);
        border-color: var(--accent-400);
    }
    .method-icon {
        width: 64px;
        height: 64px;
        border-radius: 50%;
        margin: 0 auto 20px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 26px;
        background: linear-gradient(135deg, var(--primary-700), var(--primary-900));
        color: #fff;
    }
    .method-card h3 {
        font-size: 18px;
        font-weight: 700;
        margin-bottom: 12px;
        color: var(--text-dark);
    }
    .method-card p {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.6;
        margin-bottom: 18px;
    }
    .method-link {
        font-size: 14px;
        font-weight: 600;
        color: #2563eb;
    }
    .method-link:hover {
        color: var(--accent-600);
    }

    /* ========== 分类入口 ========== */
    .category-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
    }
    .category-card {
        position: relative;
        border-radius: var(--radius-lg);
        overflow: hidden;
        min-height: 280px;
        display: flex;
        align-items: flex-end;
        background-size: cover;
        background-position: center;
        transition: var(--transition);
        border: 1px solid var(--border-line);
    }
    .category-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-hover);
    }
    .category-card::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, rgba(10, 16, 40, 0) 30%, rgba(10, 16, 40, 0.85) 100%);
        transition: var(--transition);
    }
    .category-card:hover::before {
        background: linear-gradient(180deg, rgba(10, 16, 40, 0.1) 10%, rgba(10, 16, 40, 0.9) 100%);
    }
    .category-card .card-content {
        position: relative;
        z-index: 2;
        padding: 28px;
        width: 100%;
    }
    .category-card .card-content h3 {
        color: #fff;
        font-size: 26px;
        font-weight: 800;
        margin-bottom: 6px;
    }
    .category-card .card-content p {
        color: rgba(255, 255, 255, 0.85);
        font-size: 14px;
        margin-bottom: 14px;
    }
    .category-card .card-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        color: var(--accent-400);
        font-size: 14px;
        font-weight: 600;
    }
    .category-card .card-link:hover {
        gap: 12px;
        color: #fff;
    }

    /* ========== 资讯列表 ========== */
    .news-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
    .news-card {
        display: flex;
        gap: 20px;
        background: var(--bg-white);
        border: 1px solid var(--border-line);
        border-radius: var(--radius-lg);
        padding: 24px;
        transition: var(--transition);
        align-items: flex-start;
    }
    .news-card:hover {
        box-shadow: var(--shadow-hover);
        transform: translateY(-4px);
        border-color: transparent;
    }
    .news-thumb {
        width: 120px;
        height: 90px;
        border-radius: 12px;
        object-fit: cover;
        flex-shrink: 0;
        background: rgba(37, 99, 235, 0.1);
    }
    .news-info {
        flex: 1;
    }
    .news-meta {
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 8px;
        font-size: 12px;
        color: var(--text-muted);
    }
    .news-info h3 {
        font-size: 16px;
        font-weight: 700;
        line-height: 1.5;
        color: var(--text-dark);
        margin-bottom: 8px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-info h3 a:hover {
        color: #2563eb;
    }
    .news-info p {
        font-size: 13px;
        color: var(--text-muted);
        line-height: 1.6;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-empty {
        grid-column: 1 / -1;
        text-align: center;
        padding: 60px 20px;
        background: var(--bg-white);
        border-radius: var(--radius-lg);
        border: 1px dashed var(--border-line);
        color: var(--text-muted);
    }

    /* ========== 流程 ========== */
    .process-section {
        background: linear-gradient(135deg, var(--primary-900), var(--primary-800));
        padding: 90px 0;
        color: #fff;
    }
    .process-section .section-head h2 {
        color: #fff;
    }
    .process-section .section-head p {
        color: rgba(255, 255, 255, 0.7);
    }
    .process-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
        counter-reset: step;
    }
    .process-step {
        background: rgba(255, 255, 255, 0.07);
        border: 1px solid rgba(255, 255, 255, 0.12);
        border-radius: var(--radius-lg);
        padding: 30px 24px;
        text-align: center;
        position: relative;
        transition: var(--transition);
    }
    .process-step:hover {
        background: rgba(255, 255, 255, 0.12);
        transform: translateY(-4px);
    }
    .process-step .step-num {
        width: 44px;
        height: 44px;
        border-radius: 50%;
        background: var(--accent-500);
        color: #0f172a;
        font-weight: 900;
        font-size: 18px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 18px;
        box-shadow: 0 0 0 6px rgba(245, 158, 11, 0.25);
    }
    .process-step h3 {
        font-size: 18px;
        margin-bottom: 8px;
        color: #fff;
    }
    .process-step p {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.7);
        line-height: 1.6;
    }

    /* ========== FAQ ========== */
    .faq-list {
        max-width: 800px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 16px;
    }
    .faq-item {
        background: var(--bg-white);
        border: 1px solid var(--border-line);
        border-radius: var(--radius-md);
        padding: 26px 30px;
        cursor: pointer;
        transition: var(--transition);
    }
    .faq-item:hover {
        border-color: var(--accent-400);
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
    }
    .faq-item summary {
        font-weight: 600;
        font-size: 16px;
        color: var(--text-dark);
        list-style: none;
        display: flex;
        justify-content: space-between;
        align-items: center;
        gap: 16px;
        cursor: pointer;
    }
    .faq-item summary::-webkit-details-marker {
        display: none;
    }
    .faq-item summary::after {
        content: "+";
        font-size: 22px;
        color: var(--accent-500);
        font-weight: 700;
        transition: var(--transition);
        flex-shrink: 0;
    }
    .faq-item[open] summary::after {
        transform: rotate(45deg);
    }
    .faq-item .faq-body {
        margin-top: 14px;
        padding-top: 14px;
        border-top: 1px solid var(--border-line);
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.7;
    }

    /* ========== CTA ========== */
    .cta-section {
        background: linear-gradient(135deg, var(--primary-800), var(--primary-950));
        padding: 80px 0;
        position: relative;
        overflow: hidden;
        text-align: center;
    }
    .cta-section::before {
        content: "";
        position: absolute;
        top: -60%;
        right: -20%;
        width: 500px;
        height: 500px;
        border-radius: 50%;
        background: rgba(34, 211, 238, 0.1);
        filter: blur(60px);
    }
    .cta-inner {
        position: relative;
        z-index: 2;
        max-width: 640px;
        margin: 0 auto;
    }
    .cta-inner h2 {
        color: #fff;
        font-size: 36px;
        font-weight: 800;
        margin-bottom: 16px;
    }
    .cta-inner p {
        color: rgba(255, 255, 255, 0.75);
        font-size: 16px;
        margin-bottom: 30px;
        line-height: 1.7;
    }
    .cta-actions {
        display: flex;
        gap: 14px;
        justify-content: center;
        flex-wrap: wrap;
    }

    /* ========== 页脚 ========== */
    .site-footer {
        background: var(--primary-950);
        color: rgba(255, 255, 255, 0.7);
        padding: 70px 0 30px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 1.4fr 1fr 1fr;
        gap: 48px;
        margin-bottom: 48px;
    }
    .footer-brand .footer-logo {
        font-size: 20px;
        font-weight: 800;
        color: #fff;
        margin-bottom: 14px;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .footer-brand .footer-logo i {
        background: var(--accent-500);
        color: #0f172a;
        width: 30px;
        height: 30px;
        border-radius: 8px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-style: normal;
        font-weight: 900;
    }
    .footer-brand p {
        font-size: 14px;
        line-height: 1.8;
        max-width: 360px;
    }
    .footer-col h4 {
        color: #fff;
        font-size: 16px;
        font-weight: 700;
        margin-bottom: 18px;
    }
    .footer-col ul li {
        margin-bottom: 10px;
    }
    .footer-col ul li a {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.65);
        transition: var(--transition);
    }
    .footer-col ul li a:hover {
        color: var(--accent-400);
        padding-left: 4px;
    }
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        padding-top: 24px;
        text-align: center;
        font-size: 13px;
        color: rgba(255, 255, 255, 0.45);
    }

    /* ========== 响应式 ========== */
    @media (max-width: 1024px) {
        .hero-inner {
            grid-template-columns: 1fr;
            gap: 48px;
        }
        .hero-metrics {
            grid-template-columns: repeat(2, 1fr);
        }
        .feature-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .process-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .news-grid {
            grid-template-columns: 1fr;
        }
        .stats-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
        }
    }

    @media (max-width: 768px) {
        .section {
            padding: 60px 0;
        }
        .hero {
            padding: 70px 0 60px;
        }
        .hero-content h1 {
            font-size: 36px;
        }
        .hero-content .subtitle {
            font-size: 16px;
        }
        .section-head h2 {
            font-size: 28px;
        }
        .nav-panel {
            flex-wrap: wrap;
        }
        .nav-links {
            order: 3;
            width: 100%;
            border-radius: var(--radius-md);
            flex-direction: column;
            align-items: stretch;
            background: rgba(255, 255, 255, 0.04);
            padding: 8px;
        }
        .nav-item {
            padding: 10px 16px;
        }
        .nav-toggle {
            display: flex;
        }
        .method-grid {
            grid-template-columns: 1fr;
        }
        .category-grid {
            grid-template-columns: 1fr;
        }
        .feature-grid {
            grid-template-columns: 1fr;
        }
        .process-grid {
            grid-template-columns: 1fr;
        }
        .stats-grid {
            grid-template-columns: 1fr 1fr;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 30px;
        }
    }

    @media (max-width: 520px) {
        .container {
            padding: 0 16px;
        }
        .btn {
            padding: 10px 20px;
            font-size: 14px;
        }
        .hero-content h1 {
            font-size: 30px;
        }
        .hero-actions {
            flex-direction: column;
            align-items: stretch;
        }
        .hero-metrics {
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }
        .metric-card {
            padding: 18px 12px;
        }
        .metric-card .num {
            font-size: 28px;
        }
        .stats-grid {
            grid-template-columns: 1fr;
        }
        .news-card {
            flex-direction: column;
        }
        .news-thumb {
            width: 100%;
            height: 160px;
        }
        .category-card {
            min-height: 220px;
        }
        .cta-inner h2 {
            font-size: 28px;
        }
    }

/* roulang page: category1 */
:root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --primary-light: #dbeafe;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --bg: #f8fafc;
            --bg-alt: #eef2f7;
            --white: #ffffff;
            --dark: #0f172a;
            --dark-light: #1e293b;
            --text: #1e293b;
            --text-light: #64748b;
            --border: #e2e8f0;
            --radius: 18px;
            --radius-sm: 10px;
            --shadow: 0 4px 24px rgba(15, 23, 42, .06);
            --shadow-lg: 0 12px 40px rgba(15, 23, 42, .1);
            --shadow-accent: 0 8px 30px rgba(245, 158, 11, .35);
            --space: 80px;
            --transition: .3s cubic-bezier(.4, 0, .2, 1);
            --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --font-mono: "SF Mono", "Fira Code", "Cascadia Code", Consolas, "Courier New", monospace;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
            height: auto;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            font-size: inherit;
            color: inherit;
        }
        input {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: var(--space) 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 40px;
            letter-spacing: .5px;
            margin-bottom: 14px;
        }
        .section-head h2 {
            font-size: 34px;
            line-height: 1.3;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: -1px;
        }
        .section-head p {
            color: var(--text-light);
            font-size: 16px;
            line-height: 1.7;
        }

        /* ---------- Header / Nav ---------- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(248, 250, 252, .85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(226, 232, 240, .7);
            padding: 14px 0;
        }
        .nav-panel {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -1px;
            flex-shrink: 0;
        }
        .nav-logo i {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, #2563eb, #3b82f6);
            color: #fff;
            font-style: normal;
            border-radius: 12px;
            font-size: 18px;
            font-weight: 800;
            box-shadow: 0 4px 14px rgba(37, 99, 235, .35);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 4px;
            box-shadow: 0 2px 12px rgba(15, 23, 42, .04);
        }
        .nav-item {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-light);
            transition: all var(--transition);
        }
        .nav-item:hover {
            color: var(--primary);
            background: var(--bg);
        }
        .nav-item.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 700;
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 4px;
            width: 42px;
            height: 42px;
            background: var(--primary-light);
            border-radius: 10px;
            padding: 0 10px;
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ---------- Buttons ---------- */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 700;
            border-radius: 12px;
            transition: all var(--transition);
            line-height: 1;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            padding: 14px 30px;
            box-shadow: 0 4px 20px rgba(37, 99, 235, .3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(37, 99, 235, .4);
        }
        .btn-outline-light {
            border: 2px solid rgba(255, 255, 255, .7);
            color: #fff;
            padding: 12px 28px;
            background: transparent;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .15);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .btn-accent {
            background: linear-gradient(135deg, #f59e0b, #f97316);
            color: #fff;
            padding: 14px 32px;
            box-shadow: var(--shadow-accent);
        }
        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 36px rgba(245, 158, 11, .45);
        }
        .btn-sm {
            padding: 9px 20px;
            font-size: 14px;
            border-radius: 10px;
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 16px;
            border-radius: 14px;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(37, 99, 235, .45);
            outline-offset: 2px;
        }

        /* ---------- Page Hero ---------- */
        .page-hero {
            position: relative;
            padding: 110px 0 100px;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            color: #fff;
            overflow: hidden;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, .92), rgba(30, 58, 138, .78));
            z-index: 1;
        }
        .page-hero::after {
            content: "";
            position: absolute;
            right: -120px;
            top: -120px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(37, 99, 235, .45), transparent 70%);
            z-index: 1;
            border-radius: 50%;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero-inner {
            max-width: 760px;
        }
        .page-hero .badge-hero {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .12);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, .25);
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 22px;
            color: #e2e8f0;
        }
        .page-hero h1 {
            font-size: 46px;
            line-height: 1.25;
            font-weight: 800;
            letter-spacing: -1.5px;
            margin-bottom: 16px;
        }
        .page-hero p.lead {
            font-size: 18px;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 28px;
            line-height: 1.8;
            max-width: 640px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .hero-stats {
            display: flex;
            gap: 36px;
            margin-top: 48px;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, .15);
        }
        .hero-stats .stat-num {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .hero-stats .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, .65);
            margin-top: 2px;
        }

        /* ---------- Method Cards ---------- */
        .method-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .method-card {
            position: relative;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 24px;
            transition: all var(--transition);
            overflow: hidden;
        }
        .method-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), transparent);
            opacity: 0;
            transition: opacity var(--transition);
        }
        .method-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(37, 99, 235, .25);
        }
        .method-card:hover::before {
            opacity: 1;
        }
        .card-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 18px;
        }
        .card-dots {
            display: flex;
            gap: 5px;
        }
        .card-dots span {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #e2e8f0;
        }
        .card-dots span:nth-child(1) {
            background: #fc8181;
        }
        .card-dots span:nth-child(2) {
            background: #fbbf24;
        }
        .card-dots span:nth-child(3) {
            background: #34d399;
        }
        .card-status {
            font-family: var(--font-mono);
            font-size: 12px;
            color: var(--text-light);
            background: var(--bg);
            padding: 3px 10px;
            border-radius: 6px;
            border: 1px solid var(--border);
        }
        .method-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, var(--primary-light), #eff6ff);
            border-radius: 14px;
            font-size: 22px;
            color: var(--primary);
            margin-bottom: 18px;
        }
        .method-card:nth-child(2) .method-icon {
            background: linear-gradient(135deg, #fef3c7, #fffbeb);
            color: #d97706;
        }
        .method-card:nth-child(3) .method-icon {
            background: linear-gradient(135deg, #d1fae5, #ecfdf5);
            color: #059669;
        }
        .method-card:nth-child(4) .method-icon {
            background: linear-gradient(135deg, #ede9fe, #f5f3ff);
            color: #7c3aed;
        }
        .method-badge {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 30px;
            background: var(--bg-alt);
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .method-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .method-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: gap var(--transition);
        }
        .card-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* ---------- Flow Steps ---------- */
        .section-flow {
            background: linear-gradient(180deg, var(--bg), #eef4ff);
        }
        .flow-steps {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            position: relative;
        }
        .flow-steps::before {
            content: "";
            position: absolute;
            top: 44px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: repeating-linear-gradient(90deg, var(--primary) 0 6px, transparent 6px 12px);
            opacity: .35;
        }
        .flow-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .step-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            margin: 0 auto 16px;
            background: var(--white);
            border: 2px solid var(--primary);
            border-radius: 16px;
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(37, 99, 235, .15);
        }
        .flow-step h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text);
        }
        .flow-step p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ---------- Detail Blocks ---------- */
        .detail-list {
            display: grid;
            gap: 60px;
        }
        .detail-item {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .detail-item:nth-child(even) {
            direction: rtl;
        }
        .detail-item>* {
            direction: ltr;
        }
        .detail-img {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
        }
        .detail-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(15, 23, 42, .2));
            pointer-events: none;
        }
        .detail-img img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            transition: transform .6s ease;
        }
        .detail-item:hover .detail-img img {
            transform: scale(1.03);
        }
        .detail-content h3 {
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 14px;
            color: var(--text);
            letter-spacing: -.5px;
        }
        .detail-content p {
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .detail-steps {
            list-style: none;
            margin-top: 8px;
        }
        .detail-steps li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 8px 0;
            font-size: 14px;
            color: var(--text-light);
            border-bottom: 1px dashed var(--border);
        }
        .detail-steps li:last-child {
            border-bottom: none;
        }
        .detail-steps li i {
            color: var(--primary);
            font-size: 15px;
            margin-top: 3px;
        }
        .detail-badge-strip {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 14px;
        }
        .dg-badge {
            font-size: 12px;
            font-weight: 600;
            background: var(--bg);
            border: 1px solid var(--border);
            color: var(--text-light);
            padding: 4px 12px;
            border-radius: 30px;
        }

        /* ---------- Security ---------- */
        .section-security {
            background: var(--dark);
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .section-security::before {
            content: "";
            position: absolute;
            left: -80px;
            bottom: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(37, 99, 235, .35), transparent 70%);
        }
        .section-security .section-tag {
            background: rgba(59, 130, 246, .2);
            color: #93c5fd;
        }
        .section-security .section-head h2 {
            color: #fff;
        }
        .section-security .section-head p {
            color: rgba(255, 255, 255, .65);
        }
        .security-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
            z-index: 1;
        }
        .security-item {
            background: rgba(255, 255, 255, .05);
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: var(--radius);
            padding: 28px 22px;
            backdrop-filter: blur(4px);
            transition: all var(--transition);
        }
        .security-item:hover {
            background: rgba(255, 255, 255, .09);
            transform: translateY(-4px);
        }
        .security-item i {
            font-size: 24px;
            color: #93c5fd;
            margin-bottom: 14px;
            display: block;
        }
        .security-item h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
            color: #fff;
        }
        .security-item p {
            font-size: 13px;
            color: rgba(255, 255, 255, .6);
            line-height: 1.7;
        }

        /* ---------- FAQ ---------- */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item.open {
            box-shadow: var(--shadow);
            border-color: rgba(37, 99, 235, .3);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            width: 100%;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            background: transparent;
        }
        .faq-question i {
            color: var(--primary);
            font-size: 14px;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            display: none;
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.8;
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ---------- CTA ---------- */
        .section-cta {
            padding-top: 0;
        }
        .cta-box {
            text-align: center;
            background: linear-gradient(135deg, #0066ff, #2563eb);
            border-radius: 24px;
            padding: 60px 40px;
            position: relative;
            overflow: hidden;
            box-shadow: 0 16px 48px rgba(37, 99, 235, .3);
        }
        .cta-box::before {
            content: "";
            position: absolute;
            right: -80px;
            top: -80px;
            width: 240px;
            height: 240px;
            background: rgba(255, 255, 255, .08);
            border-radius: 50%;
        }
        .cta-box::after {
            content: "";
            position: absolute;
            left: -40px;
            bottom: -100px;
            width: 200px;
            height: 200px;
            background: rgba(255, 255, 255, .05);
            border-radius: 50%;
        }
        .cta-box h2 {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-box p {
            color: rgba(255, 255, 255, .85);
            font-size: 16px;
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
        }
        .cta-box .btn {
            position: relative;
            z-index: 1;
        }

        /* ---------- Footer ---------- */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, .7);
            padding: 60px 0 0;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr .8fr .8fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-logo i {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, #2563eb, #3b82f6);
            color: #fff;
            font-style: normal;
            border-radius: 10px;
            font-size: 16px;
            font-weight: 800;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .55);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul {
            display: grid;
            gap: 10px;
        }
        .footer-col a {
            font-size: 14px;
            color: rgba(255, 255, 255, .55);
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: #93c5fd;
            padding-left: 4px;
        }
        .footer-bottom {
            padding: 22px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }
        .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
        }

        /* ---------- Responsive ---------- */
        @media (max-width: 1024px) {
            :root {
                --space: 64px;
            }
            .method-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .security-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .flow-steps {
                grid-template-columns: repeat(3, 1fr);
                gap: 32px;
            }
            .flow-steps::before {
                display: none;
            }
            .detail-item {
                gap: 32px;
            }
        }
        @media (max-width: 768px) {
            .nav-panel {
                flex-wrap: wrap;
            }
            .nav-links {
                order: 3;
                flex-basis: 100%;
                display: none;
                flex-direction: column;
                gap: 4px;
                padding: 8px;
                margin-top: 8px;
            }
            .nav-links.active {
                display: flex;
            }
            .nav-item {
                width: 100%;
                justify-content: center;
                padding: 12px;
            }
            .nav-toggle {
                display: flex;
            }
            .page-hero {
                padding: 80px 0 70px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .page-hero p.lead {
                font-size: 16px;
            }
            .hero-stats {
                flex-wrap: wrap;
                gap: 20px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: flex-start;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .section-head h2 {
                font-size: 28px;
            }
            .detail-item {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .detail-item:nth-child(even) {
                direction: ltr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 26px;
            }
        }
        @media (max-width: 520px) {
            :root {
                --space: 48px;
            }
            .container {
                padding: 0 18px;
            }
            .nav-logo {
                font-size: 17px;
            }
            .nav-logo i {
                width: 34px;
                height: 34px;
                font-size: 15px;
            }
            .method-grid {
                grid-template-columns: 1fr;
            }
            .security-grid {
                grid-template-columns: 1fr;
            }
            .flow-steps {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero .badge-hero {
                font-size: 12px;
                padding: 5px 12px;
            }
            .hero-stats {
                gap: 16px;
            }
            .hero-stats .stat-num {
                font-size: 22px;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .section-head p {
                font-size: 14px;
            }
            .detail-content h3 {
                font-size: 20px;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

/* roulang page: article */
*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1a56db;
            --primary-dark: #1e40af;
            --primary-light: #eff6ff;
            --accent: #06b6d4;
            --accent-light: #ecfeff;
            --bg: #f1f5f9;
            --surface: #ffffff;
            --text: #0f172a;
            --text-light: #475569;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --success: #10b981;
            --warning: #f59e0b;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 4px 20px rgba(15, 23, 42, .06);
            --shadow-hover: 0 14px 34px rgba(15, 23, 42, .12);
            --container: 1200px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            outline: none;
            border: none;
            background: none;
            font-family: inherit;
            cursor: pointer;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 12px 0;
            background: rgba(248, 250, 252, .85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(226, 232, 240, .7);
        }
        .nav-panel {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 10px 18px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .nav-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 20px;
            color: var(--text);
            white-space: nowrap;
            transition: opacity .2s;
        }
        .nav-logo:hover {
            opacity: .85;
        }
        .nav-logo i,
        .footer-logo i {
            display: grid;
            place-items: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            border-radius: 10px;
            font-style: normal;
            font-size: 18px;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(26, 86, 219, .3);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }
        .nav-item {
            display: block;
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: all .25s;
        }
        .nav-item:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-item.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            border: 2px solid transparent;
            transition: all .25s;
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(30, 64, 175, .25);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(30, 64, 175, .3);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-light);
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
        }
        .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(0, 0, 0, .18);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, .65);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .15);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 14px;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--primary-light);
            align-items: center;
            justify-content: center;
        }
        .nav-toggle span {
            display: block;
            width: 18px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: all .3s;
        }
        .page-banner {
            position: relative;
            padding: 76px 0 96px;
            background: linear-gradient(135deg, rgba(2, 6, 23, .85), rgba(30, 64, 175, .8)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
            text-align: center;
            overflow: hidden;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg), transparent);
            pointer-events: none;
        }
        .breadcrumb {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, .7);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, .85);
            text-decoration: none;
            transition: color .2s;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb .sep {
            opacity: .5;
        }
        .breadcrumb .current {
            color: #fff;
            font-weight: 500;
        }
        .banner-title {
            font-size: clamp(26px, 5vw, 42px);
            font-weight: 800;
            line-height: 1.35;
            max-width: 880px;
            margin: 0 auto 18px;
            letter-spacing: .5px;
        }
        .banner-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 18px;
            font-size: 14px;
            color: rgba(255, 255, 255, .85);
            flex-wrap: wrap;
        }
        .tag-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 30px;
            font-size: 13px;
            font-weight: 600;
        }
        .tag-badge::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            flex-shrink: 0;
        }
        .banner-meta .tag-badge {
            background: rgba(255, 255, 255, .18);
            color: #fff;
        }
        .banner-meta .tag-badge::before {
            background: #67e8f9;
        }
        .article-section {
            position: relative;
            z-index: 2;
            padding: 0 0 64px;
            margin-top: -48px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 360px;
            gap: 32px;
            align-items: start;
        }
        .article-main {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 44px 48px;
            box-shadow: var(--shadow);
        }
        .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text);
            word-wrap: break-word;
        }
        .article-content h2 {
            font-size: 24px;
            margin: 32px 0 16px;
            line-height: 1.4;
            color: var(--text);
        }
        .article-content h3 {
            font-size: 20px;
            margin: 24px 0 12px;
            color: var(--text);
        }
        .article-content h4 {
            font-size: 17px;
            margin: 20px 0 10px;
        }
        .article-content p {
            margin: 0 0 16px;
        }
        .article-content ul,
        .article-content ol {
            margin: 0 0 16px;
            padding-left: 24px;
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 22px;
            border-radius: 0 12px 12px 0;
            margin: 24px 0;
            color: var(--text-light);
            font-style: normal;
        }
        .article-content img {
            max-width: 100%;
            border-radius: 12px;
            margin: 20px 0;
            box-shadow: var(--shadow);
        }
        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content code {
            background: var(--bg);
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 14px;
            font-family: "SFMono-Regular", Consolas, monospace;
        }
        .article-content pre {
            background: #0f172a;
            color: #e2e8f0;
            padding: 20px 24px;
            border-radius: 12px;
            overflow-x: auto;
            margin: 24px 0;
            line-height: 1.7;
            font-size: 14px;
        }
        .article-content pre code {
            background: none;
            color: inherit;
            padding: 0;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
            font-size: 14px;
        }
        .article-content th,
        .article-content td {
            border: 1px solid var(--border);
            padding: 10px 14px;
            text-align: left;
        }
        .article-content th {
            background: var(--primary-light);
            font-weight: 600;
        }
        .article-content hr {
            border: none;
            border-top: 1px solid var(--border);
            margin: 28px 0;
        }
        .article-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            flex-wrap: wrap;
            margin-top: 36px;
            padding-top: 20px;
            border-top: 1px solid var(--border);
            font-size: 14px;
            color: var(--text-light);
        }
        .article-empty {
            text-align: center;
            padding: 48px 24px;
        }
        .empty-icon {
            display: grid;
            place-items: center;
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            font-size: 28px;
            font-weight: 800;
        }
        .article-empty h2 {
            font-size: 26px;
            margin-bottom: 10px;
        }
        .article-empty p {
            color: var(--text-light);
            margin-bottom: 24px;
            font-size: 15px;
        }
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 96px;
        }
        .side-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
        }
        .side-card h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary-light);
            position: relative;
            color: var(--text);
        }
        .side-card h3::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 40px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .side-cat-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .side-cat-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 14px;
            border: 1px solid var(--border);
            border-radius: 10px;
            text-decoration: none;
            color: var(--text);
            font-size: 14px;
            font-weight: 500;
            transition: all .25s;
        }
        .side-cat-item:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
            transform: translateX(4px);
        }
        .side-cat-item .arrow {
            color: var(--text-muted);
            font-size: 16px;
            transition: color .2s;
        }
        .side-cat-item:hover .arrow {
            color: var(--primary);
        }
        .side-post-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .side-post-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            transition: transform .2s;
        }
        .side-post-item:hover {
            transform: translateX(4px);
        }
        .side-post-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
            flex-shrink: 0;
            margin-top: 8px;
        }
        .side-post-title {
            display: block;
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
            line-height: 1.5;
            transition: color .2s;
        }
        .side-post-title:hover {
            color: var(--primary);
        }
        .side-post-date {
            display: block;
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .security-tip {
            background: linear-gradient(135deg, #0f172a, #1e3a8a);
            color: #fff;
        }
        .security-tip h3 {
            color: #fff;
            border-bottom-color: rgba(255, 255, 255, .15);
        }
        .security-tip h3::after {
            background: var(--accent);
        }
        .tip-list {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .tip-list li {
            position: relative;
            padding: 8px 0 8px 26px;
            font-size: 14px;
            color: rgba(255, 255, 255, .85);
            line-height: 1.6;
        }
        .tip-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            top: 8px;
            color: #34d399;
            font-weight: 700;
            font-size: 16px;
        }
        .related-section {
            padding: 64px 0;
            background: var(--bg);
        }
        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 32px;
            flex-wrap: wrap;
        }
        .section-title {
            font-size: 30px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
        }
        .section-sub {
            color: var(--text-light);
            margin-top: 6px;
            font-size: 15px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }
        .related-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            text-decoration: none;
            color: var(--text);
            display: flex;
            flex-direction: column;
            transition: all .3s;
            box-shadow: 0 2px 10px rgba(15, 23, 42, .04);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .related-card .thumb {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--primary-light);
        }
        .related-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s;
        }
        .related-card:hover .thumb img {
            transform: scale(1.06);
        }
        .related-card .body {
            padding: 18px 20px 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }
        .related-card .title {
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .date {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .related-card .date::before {
            content: '🕒';
            font-size: 12px;
            opacity: .8;
        }
        .faq-section {
            padding: 64px 0;
            background: var(--surface);
        }
        .faq-section .section-head {
            justify-content: center;
            text-align: center;
            flex-direction: column;
            align-items: center;
            margin-bottom: 36px;
        }
        .faq-list {
            display: grid;
            gap: 14px;
            max-width: 880px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: 14px;
            overflow: hidden;
            transition: all .25s;
            background: var(--surface);
        }
        .faq-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }
        .faq-item summary {
            padding: 20px 50px 20px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 15px;
            color: var(--text);
            list-style: none;
            position: relative;
            line-height: 1.5;
            transition: color .2s;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '+';
            position: absolute;
            right: 22px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 24px;
            font-weight: 400;
            color: var(--primary);
            transition: transform .3s;
        }
        .faq-item[open] summary::after {
            transform: translateY(-50%) rotate(45deg);
        }
        .faq-item .faq-body {
            padding: 0 24px 20px;
            color: var(--text-light);
            font-size: 14px;
            line-height: 1.8;
            border-top: 1px solid var(--border);
            margin-top: 0;
            padding-top: 14px;
        }
        .cta-section {
            padding: 60px 0;
            background: linear-gradient(135deg, #1e3a8a, #0ea5e9);
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, .15), transparent 40%), radial-gradient(circle at 80% 80%, rgba(2, 6, 23, .25), transparent 40%);
        }
        .cta-box {
            position: relative;
            max-width: 720px;
            margin: 0 auto;
        }
        .cta-box h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 14px;
        }
        .cta-box p {
            font-size: 16px;
            opacity: .92;
            margin-bottom: 30px;
            line-height: 1.7;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }
        .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-logo i {
            width: 34px;
            height: 34px;
            font-size: 16px;
            border-radius: 8px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 360px;
            color: #94a3b8;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-col a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 14px;
            transition: color .2s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col a::before {
            content: '';
            width: 5px;
            height: 5px;
            border-radius: 50%;
            background: var(--primary);
            opacity: .6;
            transition: opacity .2s;
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-col a:hover::before {
            opacity: 1;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 22px 0;
            text-align: center;
            font-size: 14px;
            color: #64748b;
        }
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
            }
            .side-card {
                flex: 1;
                min-width: 240px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .nav-cta .btn {
                display: none;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: calc(100% + 8px);
                left: 12px;
                right: 12px;
                flex-direction: column;
                align-items: stretch;
                background: var(--surface);
                border: 1px solid var(--border);
                border-radius: 14px;
                box-shadow: var(--shadow-hover);
                padding: 12px;
                gap: 4px;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-item {
                text-align: center;
                padding: 14px 16px;
            }
            .page-banner {
                padding: 52px 0 84px;
            }
            .article-main {
                padding: 28px 22px;
            }
            .banner-title {
                font-size: 24px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .faq-item summary {
                padding: 16px 44px 16px 18px;
                font-size: 14px;
            }
            .faq-item .faq-body {
                padding: 0 18px 16px;
            }
            .cta-box h2 {
                font-size: 24px;
            }
            .cta-actions .btn {
                width: 100%;
            }
            .article-footer {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 520px) {
            .nav-panel {
                padding: 8px 12px;
                gap: 10px;
            }
            .nav-logo {
                font-size: 16px;
            }
            .nav-logo i {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .btn-sm {
                padding: 7px 12px;
                font-size: 13px;
            }
            .article-main {
                padding: 20px 16px;
                border-radius: 12px;
            }
            .article-content {
                font-size: 15px;
            }
            .article-content h2 {
                font-size: 20px;
            }
            .article-content h3 {
                font-size: 17px;
            }
            .side-card {
                min-width: 100%;
            }
            .section-title {
                font-size: 24px;
            }
            .breadcrumb {
                font-size: 13px;
            }
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f1e3d;
            --primary-light: #1e3a5f;
            --primary-dark: #091126;
            --accent: #10b981;
            --accent-hover: #0ea472;
            --accent-light: #d1fae5;
            --blue: #3b82f6;
            --blue-light: #eff6ff;
            --warning: #f59e0b;
            --bg: #f0f4f8;
            --card: #ffffff;
            --text: #1e293b;
            --text-light: #64748b;
            --border: #e2e8f0;
            --radius: 18px;
            --radius-sm: 12px;
            --radius-lg: 28px;
            --shadow: 0 4px 24px rgba(15, 30, 61, 0.07);
            --shadow-hover: 0 16px 40px rgba(15, 30, 61, 0.13);
            --transition: 0.3s ease;
            --container: 1200px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        img {
            display: block;
            max-width: 100%;
            height: auto;
        }
        button {
            border: none;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }
        input {
            font-family: inherit;
        }

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

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            border: 2px solid transparent;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(15, 30, 61, 0.22);
        }
        .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(15, 30, 61, 0.28);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(15, 30, 61, 0.2);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 16px rgba(16, 185, 129, 0.25);
        }
        .btn-accent:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(16, 185, 129, 0.32);
        }
        .btn-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.55);
            color: #fff;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline-dark {
            background: transparent;
            border-color: var(--primary);
            color: var(--primary);
        }
        .btn-outline-dark:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 9px 20px;
            font-size: 14px;
        }
        .btn-lg {
            padding: 15px 38px;
            font-size: 16px;
        }
        .btn:focus-visible,
        a:focus-visible {
            outline: 3px solid rgba(59, 130, 246, 0.55);
            outline-offset: 2px;
        }

        /* ===== 导航栏 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 14px 0 10px;
            background: rgba(240, 244, 248, 0.82);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
        }
        .nav-panel {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            background: rgba(255, 255, 255, 0.94);
            border: 1px solid rgba(255, 255, 255, 0.72);
            border-radius: 22px;
            box-shadow: 0 8px 32px rgba(15, 30, 61, 0.09);
            padding: 12px 20px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .nav-logo i {
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-style: normal;
            font-weight: 800;
            font-size: 19px;
            box-shadow: 0 4px 12px rgba(15, 30, 61, 0.28);
        }
        .nav-logo:hover {
            color: var(--primary-light);
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 2px;
            margin: 0;
            padding: 0;
            flex: 1;
            justify-content: center;
        }
        .nav-item {
            display: inline-block;
            padding: 9px 20px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            transition: all var(--transition);
        }
        .nav-item:hover {
            background: #f1f5f9;
            color: var(--primary);
        }
        .nav-item.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(15, 30, 61, 0.22);
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            background: transparent;
        }
        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .nav-toggle:hover span {
            background: var(--primary-light);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 68px 0 32px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 44px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-logo i {
            width: 38px;
            height: 38px;
            background: var(--accent);
            color: var(--primary-dark);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-style: normal;
            font-weight: 800;
            font-size: 19px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 360px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.68);
            transition: all var(--transition);
        }
        .footer-col ul a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            padding-top: 28px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        /* ===== 通用 Section ===== */
        .section {
            padding: 90px 0;
        }
        .section-alt {
            background: var(--card);
        }
        .section-header {
            text-align: center;
            margin-bottom: 56px;
            max-width: 680px;
            margin-left: auto;
            margin-right: auto;
        }
        .section-tag {
            display: inline-block;
            padding: 6px 18px;
            background: var(--accent-light);
            color: var(--accent-hover);
            font-size: 13px;
            font-weight: 700;
            border-radius: 50px;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 14px;
        }
        .section-header p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ===== Banner 首屏 ===== */
        .sec-banner {
            position: relative;
            padding: 100px 0 110px;
            overflow: hidden;
            border-radius: 0 0 42px 42px;
        }
        .banner-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(9, 17, 38, 0.92) 0%, rgba(15, 30, 61, 0.78) 50%, rgba(15, 30, 61, 0.55) 100%);
        }
        .banner-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 24px;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb span {
            color: var(--accent);
        }
        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 18px;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.22);
            border-radius: 50px;
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 20px;
            backdrop-filter: blur(6px);
        }
        .banner-badge i {
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.3);
        }
        .banner-content h1 {
            font-size: 46px;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .banner-content h1 em {
            font-style: normal;
            color: var(--accent);
        }
        .banner-content p {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.82);
            margin-bottom: 36px;
            max-width: 560px;
        }
        .banner-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 42px;
        }
        .banner-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 22px;
            padding-top: 26px;
            border-top: 1px solid rgba(255, 255, 255, 0.16);
            max-width: 560px;
        }
        .banner-meta div {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }
        .banner-meta i {
            width: 22px;
            height: 22px;
            border-radius: 6px;
            background: rgba(16, 185, 129, 0.22);
            display: flex;
            align-items: center;
            justify-content: center;
            font-style: normal;
            font-size: 12px;
            color: var(--accent);
        }

        /* ===== 能力矩阵 ===== */
        .sec-capabilities {
            padding: 90px 0 80px;
        }
        .cap-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .cap-card {
            background: var(--card);
            border-radius: var(--radius);
            padding: 34px 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .cap-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), var(--blue));
            opacity: 0;
            transition: opacity var(--transition);
        }
        .cap-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(16, 185, 129, 0.3);
        }
        .cap-card:hover::before {
            opacity: 1;
        }
        .cap-icon {
            width: 54px;
            height: 54px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            background: var(--accent-light);
            color: var(--accent-hover);
            margin-bottom: 22px;
            transition: all var(--transition);
        }
        .cap-card:hover .cap-icon {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 8px 20px rgba(16, 185, 129, 0.28);
            transform: scale(1.05);
        }
        .cap-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .cap-card p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-light);
        }

        /* ===== 流程区域 ===== */
        .sec-process {
            padding: 90px 0;
            background: var(--card);
            border-radius: 42px;
            margin: 0 16px;
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            position: relative;
        }
        .process-grid::before {
            content: "";
            position: absolute;
            top: 50%;
            left: 8%;
            right: 8%;
            height: 2px;
            background: linear-gradient(90deg, var(--border), var(--accent-light), var(--border));
            transform: translateY(-50%);
            z-index: 0;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .process-num {
            width: 58px;
            height: 58px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            box-shadow: 0 0 0 6px rgba(255, 255, 255, 0.9), 0 0 0 10px rgba(15, 30, 61, 0.08);
            transition: all var(--transition);
        }
        .process-step:hover .process-num {
            background: var(--accent);
            box-shadow: 0 0 0 6px #fff, 0 0 0 10px rgba(16, 185, 129, 0.18);
            transform: scale(1.08);
        }
        .process-step h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            padding: 0 8px;
        }

        /* ===== 数据统计 ===== */
        .sec-stats {
            position: relative;
            padding: 90px 0;
            border-radius: 42px;
            margin: 0 16px;
            overflow: hidden;
        }
        .stats-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
        }
        .stats-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(9, 17, 38, 0.94), rgba(15, 30, 61, 0.85));
        }
        .stats-grid {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 20px;
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius);
            backdrop-filter: blur(8px);
            transition: all var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.12);
            transform: translateY(-4px);
        }
        .stat-num {
            font-size: 42px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 8px;
            letter-spacing: 1px;
        }
        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== 文章列表 ===== */
        .sec-articles {
            padding: 90px 0;
        }
        .article-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .article-card {
            background: var(--card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
            border-color: rgba(59, 130, 246, 0.28);
        }
        .article-image {
            position: relative;
            height: 220px;
            overflow: hidden;
        }
        .article-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .article-card:hover .article-image img {
            transform: scale(1.06);
        }
        .article-image::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(15, 30, 61, 0.35));
        }
        .article-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.94);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: 50px;
            box-shadow: 0 4px 12px rgba(15, 30, 61, 0.14);
        }
        .article-body {
            padding: 26px 28px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-body h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.45;
            margin-bottom: 12px;
            transition: color var(--transition);
        }
        .article-card:hover .article-body h3 {
            color: var(--blue);
        }
        .article-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-light);
            padding-top: 16px;
            border-top: 1px solid var(--border);
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* ===== FAQ ===== */
        .sec-faq {
            padding: 90px 0;
            background: var(--card);
            border-radius: 42px;
            margin: 0 16px;
        }
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
            display: grid;
            gap: 14px;
        }
        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            overflow: hidden;
        }
        .faq-item:hover {
            border-color: rgba(59, 130, 246, 0.3);
            box-shadow: var(--shadow);
        }
        .faq-item summary {
            list-style: none;
            cursor: pointer;
            padding: 22px 28px;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 14px;
            position: relative;
            transition: all var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary i {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-style: normal;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 12px;
            font-weight: 700;
        }
        .faq-item summary::after {
            content: "+";
            margin-left: auto;
            font-size: 22px;
            font-weight: 400;
            color: var(--text-light);
            transition: all var(--transition);
            flex-shrink: 0;
        }
        .faq-item summary:hover {
            background: rgba(59, 130, 246, 0.04);
        }
        .faq-item[open] summary::after {
            transform: rotate(45deg);
            color: var(--accent);
        }
        .faq-item[open] summary {
            border-bottom: 1px solid var(--border);
        }
        .faq-item .faq-answer {
            padding: 18px 28px 24px 74px;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .sec-cta {
            padding: 90px 0 100px;
        }
        .cta-box {
            position: relative;
            background: linear-gradient(110deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-lg);
            padding: 64px 56px;
            overflow: hidden;
            text-align: center;
            box-shadow: 0 20px 50px rgba(15, 30, 61, 0.25);
        }
        .cta-box::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -80px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(16, 185, 129, 0.18);
            filter: blur(20px);
        }
        .cta-box::after {
            content: "";
            position: absolute;
            bottom: -60px;
            left: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(59, 130, 246, 0.14);
            filter: blur(16px);
        }
        .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-box h2 {
            color: #fff;
            font-size: 30px;
            font-weight: 800;
            margin-bottom: 14px;
        }
        .cta-box p {
            color: rgba(255, 255, 255, 0.78);
            font-size: 16px;
            max-width: 560px;
            margin: 0 auto 34px;
            line-height: 1.8;
        }
        .cta-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 14px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .cap-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 36px 24px;
            }
            .process-grid::before {
                display: none;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .banner-content h1 {
                font-size: 38px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 64px 0;
            }
            .sec-capabilities,
            .sec-articles {
                padding: 64px 0;
            }
            .sec-process,
            .sec-faq {
                border-radius: 28px;
                margin: 0 8px;
                padding: 64px 0;
            }
            .nav-panel {
                flex-wrap: wrap;
                padding: 14px 16px;
                border-radius: 18px;
            }
            .nav-links {
                order: 3;
                flex-basis: 100%;
                justify-content: flex-start;
                overflow-x: auto;
                padding: 10px 0 4px;
                gap: 6px;
                -webkit-overflow-scrolling: touch;
            }
            .nav-links::-webkit-scrollbar {
                display: none;
            }
            .nav-item {
                padding: 8px 16px;
                font-size: 14px;
                white-space: nowrap;
            }
            .nav-cta .btn-sm {
                padding: 8px 16px;
                font-size: 13px;
            }
            .banner-content h1 {
                font-size: 32px;
            }
            .banner-content p {
                font-size: 15px;
            }
            .article-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .article-image {
                height: 190px;
            }
            .cta-box {
                padding: 48px 28px;
            }
            .cta-box h2 {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .stat-num {
                font-size: 32px;
            }
            .faq-item summary {
                padding: 18px 20px;
                font-size: 15px;
            }
            .faq-item .faq-answer {
                padding: 16px 20px 20px;
                font-size: 14px;
            }
            .sec-banner {
                padding: 70px 0 80px;
                border-radius: 0 0 28px 28px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .nav-panel {
                gap: 10px;
            }
            .nav-logo {
                font-size: 15px;
            }
            .nav-logo i {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .nav-cta .btn-sm {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .cap-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .process-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .stat-item {
                padding: 24px 16px;
            }
            .stat-num {
                font-size: 28px;
            }
            .banner-content h1 {
                font-size: 26px;
            }
            .banner-content p {
                font-size: 14px;
            }
            .banner-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .banner-actions .btn {
                width: 100%;
            }
            .banner-meta {
                gap: 12px;
                flex-direction: column;
            }
            .btn-lg {
                padding: 13px 28px;
                font-size: 15px;
            }
            .cta-box {
                padding: 40px 20px;
                border-radius: 20px;
            }
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .cta-actions .btn {
                width: 100%;
            }
            .footer-bottom {
                font-size: 12px;
                line-height: 1.6;
            }
        }