/* roulang page: index */
:root {
        --primary: #2563eb;
        --primary-dark: #1e40af;
        --primary-light: #eff6ff;
        --accent: #f59e0b;
        --accent-dark: #d97706;
        --bg: #f8fafc;
        --surface: #ffffff;
        --text: #0f172a;
        --text-weak: #64748b;
        --border: #e2e8f0;
        --radius: 14px;
        --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
        --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
        --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
        --transition: all 0.3s ease;
    }
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
    }
    body {
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
        line-height: 1.7;
        color: var(--text);
        background: var(--bg);
        -webkit-font-smoothing: antialiased;
    }
    a {
        color: inherit;
        text-decoration: none;
    }
    img {
        max-width: 100%;
        display: block;
    }
    button,
    input {
        font-family: inherit;
    }
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 24px;
    }
    /* 导航 */
    .site-header {
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--border);
        position: sticky;
        top: 0;
        z-index: 100;
    }
    .nav-container {
        display: grid;
        grid-template-columns: 1fr auto 1fr;
        align-items: center;
        min-height: 70px;
        gap: 24px;
        position: relative;
    }
    .nav-group {
        display: flex;
        align-items: center;
        gap: 32px;
    }
    .nav-left {
        justify-content: flex-end;
    }
    .nav-right {
        justify-content: flex-start;
    }
    .nav-link {
        font-size: 15px;
        font-weight: 500;
        color: var(--text-weak);
        padding: 8px 4px;
        border-bottom: 2px solid transparent;
        transition: var(--transition);
        position: relative;
        white-space: nowrap;
    }
    .nav-link::after {
        content: '';
        position: absolute;
        bottom: -2px;
        left: 0;
        width: 0;
        height: 2px;
        background: var(--primary);
        transition: var(--transition);
        border-radius: 2px;
    }
    .nav-link:hover {
        color: var(--primary);
    }
    .nav-link:hover::after,
    .nav-link.active::after {
        width: 100%;
    }
    .nav-link.active {
        color: var(--primary);
        font-weight: 600;
    }
    .logo {
        font-size: 26px;
        font-weight: 800;
        letter-spacing: -0.5px;
        color: var(--text);
        display: flex;
        align-items: center;
        gap: 8px;
        line-height: 1;
        white-space: nowrap;
    }
    .logo-icon {
        width: 36px;
        height: 36px;
        background: linear-gradient(135deg, var(--primary), #4f46e5);
        border-radius: 10px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 16px;
        font-weight: 700;
    }
    .nav-toggle {
        display: none;
        background: var(--primary-light);
        border: none;
        width: 42px;
        height: 42px;
        border-radius: 10px;
        cursor: pointer;
        color: var(--primary);
        font-size: 18px;
        align-items: center;
        justify-content: center;
        transition: var(--transition);
    }
    .nav-toggle:hover {
        background: #dbeafe;
    }
    .mobile-menu {
        display: none;
        flex-direction: column;
        border-top: 1px solid var(--border);
        background: var(--surface);
        padding: 16px 24px;
        gap: 4px;
    }
    .mobile-menu.open {
        display: flex;
    }
    .mobile-link {
        padding: 14px 8px;
        font-size: 16px;
        font-weight: 500;
        color: var(--text);
        border-radius: 10px;
        transition: var(--transition);
    }
    .mobile-link:hover {
        background: var(--primary-light);
        color: var(--primary);
    }
    /* 按钮 */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 14px 32px;
        border-radius: 12px;
        font-size: 16px;
        font-weight: 600;
        border: none;
        cursor: pointer;
        transition: var(--transition);
        white-space: nowrap;
    }
    .btn-primary {
        background: linear-gradient(135deg, var(--primary), #4f46e5);
        color: #fff;
        box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
    }
    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
    }
    .btn-outline {
        background: transparent;
        color: #fff;
        border: 2px solid rgba(255, 255, 255, 0.6);
    }
    .btn-outline:hover {
        background: rgba(255, 255, 255, 0.12);
        border-color: #fff;
        transform: translateY(-2px);
    }
    .btn lg {
        padding: 16px 38px;
        font-size: 17px;
    }
    /* Hero */
    .hero {
        position: relative;
        padding: 120px 0 140px;
        background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(30, 64, 175, 0.82)), url('/assets/images/backpic/back-1.png');
        background-size: cover;
        background-position: center;
        color: #fff;
        overflow: hidden;
    }
    .hero::before {
        content: '';
        position: absolute;
        top: -60%;
        right: -20%;
        width: 600px;
        height: 600px;
        background: radial-gradient(circle, rgba(59, 130, 246, 0.3), transparent 70%);
        pointer-events: none;
    }
    .hero-content {
        position: relative;
        z-index: 2;
        max-width: 820px;
        margin: 0 auto;
        text-align: center;
    }
    .hero h1 {
        font-size: 52px;
        font-weight: 800;
        line-height: 1.2;
        letter-spacing: -1px;
        margin-bottom: 20px;
    }
    .hero h1 .highlight {
        background: linear-gradient(90deg, #60a5fa, #fbbf24);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
    }
    .hero-sub {
        font-size: 19px;
        color: rgba(255, 255, 255, 0.85);
        margin-bottom: 20px;
        max-width: 680px;
        margin-left: auto;
        margin-right: auto;
    }
    .hero-desc {
        font-size: 16px;
        color: rgba(255, 255, 255, 0.7);
        max-width: 600px;
        margin: 0 auto 36px;
        line-height: 1.8;
    }
    .hero-btns {
        display: flex;
        justify-content: center;
        gap: 16px;
        flex-wrap: wrap;
    }
    .hero-tags {
        display: flex;
        justify-content: center;
        gap: 12px;
        flex-wrap: wrap;
        margin-top: 40px;
    }
    .hero-tag {
        background: rgba(255, 255, 255, 0.12);
        border: 1px solid rgba(255, 255, 255, 0.2);
        border-radius: 24px;
        padding: 6px 18px;
        font-size: 13px;
        color: rgba(255, 255, 255, 0.85);
        backdrop-filter: blur(4px);
    }
    /* 板块 */
    .section {
        padding: 90px 0;
    }
    .section-alt {
        background: var(--surface);
    }
    .section-head {
        text-align: center;
        max-width: 700px;
        margin: 0 auto 56px;
    }
    .section-head h2 {
        font-size: 36px;
        font-weight: 700;
        letter-spacing: -0.5px;
        margin-bottom: 14px;
    }
    .section-head p {
        font-size: 16px;
        color: var(--text-weak);
        line-height: 1.7;
    }
    .section-badge {
        display: inline-block;
        background: var(--primary-light);
        color: var(--primary);
        font-size: 13px;
        font-weight: 600;
        padding: 6px 16px;
        border-radius: 24px;
        margin-bottom: 16px;
        letter-spacing: 0.5px;
    }
    /* 核心服务卡片 */
    .features-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .feature-card {
        background: var(--surface);
        border-radius: var(--radius);
        padding: 40px 32px;
        border: 1px solid var(--border);
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
    }
    .feature-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
        border-color: #bfdbfe;
    }
    .feature-icon {
        width: 60px;
        height: 60px;
        border-radius: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 24px;
        margin-bottom: 24px;
    }
    .feature-icon.blue {
        background: var(--primary-light);
        color: var(--primary);
    }
    .feature-icon.amber {
        background: #fef3c7;
        color: #d97706;
    }
    .feature-icon.green {
        background: #dcfce7;
        color: #16a34a;
    }
    .feature-card h3 {
        font-size: 20px;
        font-weight: 600;
        margin-bottom: 12px;
    }
    .feature-card p {
        font-size: 15px;
        color: var(--text-weak);
        line-height: 1.7;
    }
    /* 分类卡片 */
    .category-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .category-card {
        background: var(--surface);
        border-radius: var(--radius);
        overflow: hidden;
        border: 1px solid var(--border);
        transition: var(--transition);
        display: block;
    }
    .category-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
    }
    .category-cover {
        height: 200px;
        overflow: hidden;
        position: relative;
    }
    .category-cover img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.6s ease;
    }
    .category-card:hover .category-cover img {
        transform: scale(1.05);
    }
    .category-cover::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(to top, rgba(15, 23, 42, 0.25), transparent);
    }
    .category-body {
        padding: 28px;
    }
    .category-body h3 {
        font-size: 20px;
        font-weight: 600;
        margin-bottom: 10px;
    }
    .category-body p {
        font-size: 14px;
        color: var(--text-weak);
        line-height: 1.7;
        margin-bottom: 16px;
    }
    .category-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }
    .tag {
        font-size: 12px;
        font-weight: 500;
        padding: 4px 12px;
        border-radius: 20px;
        background: var(--primary-light);
        color: var(--primary);
    }
    .tag.amber {
        background: #fef3c7;
        color: #d97706;
    }
    .tag.green {
        background: #dcfce7;
        color: #16a34a;
    }
    /* 数据统计 */
    .stats-section {
        background-image: linear-gradient(120deg, #0f172a, #1e40af);
        color: #fff;
        padding: 80px 0;
        position: relative;
    }
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 40px;
        text-align: center;
    }
    .stat-num {
        font-size: 46px;
        font-weight: 800;
        line-height: 1.2;
        margin-bottom: 8px;
        background: linear-gradient(90deg, #60a5fa, #fbbf24);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
    }
    .stat-label {
        font-size: 15px;
        opacity: 0.8;
    }
    /* 资讯列表 */
    .news-grid {
        display: grid;
        grid-template-columns: 1fr 360px;
        gap: 40px;
        align-items: start;
    }
    .news-list {
        display: flex;
        flex-direction: column;
        gap: 16px;
    }
    .news-card {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: 14px;
        padding: 24px 28px;
        transition: var(--transition);
        display: flex;
        align-items: flex-start;
        gap: 20px;
    }
    .news-card:hover {
        box-shadow: var(--shadow);
        border-color: #bfdbfe;
        transform: translateX(4px);
    }
    .news-date-box {
        min-width: 60px;
        background: var(--primary-light);
        border-radius: 10px;
        padding: 10px 8px;
        text-align: center;
        color: var(--primary);
        font-weight: 700;
        font-size: 14px;
        line-height: 1.3;
    }
    .news-card-body {
        flex: 1;
    }
    .news-card-body h3 {
        font-size: 17px;
        font-weight: 600;
        margin-bottom: 6px;
        color: var(--text);
    }
    .news-card-body h3 a:hover {
        color: var(--primary);
    }
    .news-card-body p {
        font-size: 14px;
        color: var(--text-weak);
        line-height: 1.6;
        margin-top: 6px;
    }
    .news-meta {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-top: 10px;
        font-size: 13px;
        color: var(--text-weak);
    }
    .news-meta i {
        margin-right: 4px;
    }
    .news-sidebar {
        display: flex;
        flex-direction: column;
        gap: 24px;
    }
    .news-widget {
        background: var(--surface);
        border-radius: 14px;
        border: 1px solid var(--border);
        padding: 28px;
        box-shadow: var(--shadow-sm);
    }
    .news-widget h4 {
        font-size: 16px;
        font-weight: 600;
        margin-bottom: 16px;
        padding-bottom: 12px;
        border-bottom: 1px solid var(--border);
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .news-widget h4 i {
        color: var(--primary);
    }
    .widget-list {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .widget-link {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 14px;
        color: var(--text);
        transition: var(--transition);
        padding: 8px;
        border-radius: 8px;
    }
    .widget-link:hover {
        background: var(--primary-light);
        color: var(--primary);
    }
    .widget-link i {
        color: var(--primary);
        font-size: 13px;
    }
    .empty-tip {
        background: var(--surface);
        border: 1px dashed var(--border);
        border-radius: 14px;
        padding: 40px;
        text-align: center;
        color: var(--text-weak);
        font-size: 15px;
    }
    /* 操作流程 */
    .steps-section {
        background: var(--surface);
        padding: 90px 0;
    }
    .steps-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 32px;
        position: relative;
    }
    .steps-grid::before {
        content: '';
        position: absolute;
        top: 32px;
        left: 16%;
        right: 16%;
        height: 2px;
        background: linear-gradient(90deg, #bfdbfe, var(--primary), #bfdbfe);
        border-radius: 2px;
    }
    .step-card {
        text-align: center;
        position: relative;
        padding: 0 20px;
    }
    .step-num {
        width: 64px;
        height: 64px;
        border-radius: 50%;
        background: linear-gradient(135deg, var(--primary), #4f46e5);
        color: #fff;
        font-size: 22px;
        font-weight: 700;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 24px;
        box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
        position: relative;
        z-index: 2;
        border: 4px solid var(--surface);
    }
    .step-card h3 {
        font-size: 19px;
        font-weight: 600;
        margin-bottom: 10px;
    }
    .step-card p {
        font-size: 14px;
        color: var(--text-weak);
        line-height: 1.7;
    }
    /* FAQ */
    .faq-grid {
        max-width: 800px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 16px;
    }
    .faq-item {
        background: var(--surface);
        border: 1px solid var(--border);
        border-radius: 14px;
        padding: 0;
        overflow: hidden;
        transition: var(--transition);
    }
    .faq-item:hover {
        border-color: #bfdbfe;
        box-shadow: var(--shadow-sm);
    }
    .faq-item summary {
        padding: 24px 28px;
        font-size: 16px;
        font-weight: 600;
        cursor: pointer;
        list-style: none;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        transition: var(--transition);
    }
    .faq-item summary::-webkit-details-marker {
        display: none;
    }
    .faq-item summary::after {
        content: '\f078';
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        font-size: 14px;
        color: var(--text-weak);
        transition: var(--transition);
    }
    .faq-item[open] summary::after {
        transform: rotate(180deg);
        color: var(--primary);
    }
    .faq-item[open] summary {
        color: var(--primary);
        border-bottom: 1px solid var(--border);
    }
    .faq-item .faq-body {
        padding: 20px 28px;
        font-size: 15px;
        color: var(--text-weak);
        line-height: 1.8;
        background: #fafbfc;
    }
    /* CTA */
    .cta-section {
        position: relative;
        padding: 100px 0;
        background-image: linear-gradient(120deg, rgba(15, 23, 42, 0.92), rgba(30, 64, 175, 0.85)), url('/assets/images/backpic/back-2.png');
        background-size: cover;
        background-position: center;
        color: #fff;
        text-align: center;
    }
    .cta-section h2 {
        font-size: 38px;
        font-weight: 700;
        margin-bottom: 16px;
    }
    .cta-section p {
        font-size: 17px;
        opacity: 0.85;
        margin-bottom: 36px;
        max-width: 560px;
        margin-left: auto;
        margin-right: auto;
    }
    /* 页脚 */
    .site-footer {
        background: #0f172a;
        color: rgba(255, 255, 255, 0.85);
        padding: 70px 0 0;
    }
    .footer-top {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr;
        gap: 48px;
        padding-bottom: 48px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-brand .logo {
        color: #fff;
        margin-bottom: 16px;
    }
    .footer-brand .logo .logo-icon {
        background: linear-gradient(135deg, #60a5fa, #4f46e5);
    }
    .footer-brand p {
        font-size: 14px;
        opacity: 0.6;
        line-height: 1.7;
        margin-top: 12px;
        max-width: 340px;
    }
    .footer-brand .logo {
        font-size: 24px;
    }
    .footer-col h4 {
        font-size: 16px;
        font-weight: 600;
        margin-bottom: 20px;
        color: #fff;
    }
    .footer-col ul {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .footer-col a {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.65);
        transition: var(--transition);
    }
    .footer-col a:hover {
        color: #60a5fa;
    }
    .footer-bottom {
        padding: 24px 0;
        text-align: center;
        font-size: 13px;
        color: rgba(255, 255, 255, 0.4);
        border-top: 1px solid rgba(255, 255, 255, 0.06);
    }
    /* 焦点状态 */
    .btn:focus-visible,
    .nav-link:focus-visible,
    .nav-toggle:focus-visible {
        outline: 3px solid rgba(37, 99, 235, 0.4);
        outline-offset: 2px;
    }
    /* 响应式 */
    @media (max-width: 1024px) {
        .features-grid {
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .category-grid {
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .news-grid {
            grid-template-columns: 1fr;
        }
        .news-sidebar {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
        }
        .steps-grid::before {
            display: none;
        }
    }
    @media (max-width: 768px) {
        .nav-container {
            grid-template-columns: 1fr auto;
            padding: 0 20px;
            min-height: 64px;
        }
        .nav-group {
            display: none;
        }
        .nav-toggle {
            display: inline-flex;
            margin-left: auto;
        }
        .logo {
            font-size: 22px;
            justify-self: start;
        }
        .hero {
            padding: 80px 0 100px;
        }
        .hero h1 {
            font-size: 34px;
        }
        .hero-sub {
            font-size: 17px;
        }
        .section {
            padding: 60px 0;
        }
        .section-head h2 {
            font-size: 28px;
        }
        .features-grid {
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .category-grid {
            grid-template-columns: 1fr;
            gap: 20px;
        }
        .stats-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 32px;
        }
        .stat-num {
            font-size: 36px;
        }
        .steps-grid {
            grid-template-columns: 1fr;
            gap: 40px;
        }
        .news-sidebar {
            grid-template-columns: 1fr;
        }
        .footer-top {
            grid-template-columns: 1fr;
            gap: 32px;
            padding-bottom: 32px;
        }
        .cta-section h2 {
            font-size: 28px;
        }
        .hero-btns {
            flex-direction: column;
            align-items: center;
        }
        .btn {
            width: 100%;
            max-width: 280px;
        }
    }
    @media (max-width: 520px) {
        .container {
            padding: 0 16px;
        }
        .hero h1 {
            font-size: 28px;
        }
        .hero-sub {
            font-size: 15px;
        }
        .hero-desc {
            font-size: 14px;
        }
        .stat-num {
            font-size: 28px;
        }
        .stat-label {
            font-size: 13px;
        }
        .news-card {
            padding: 16px;
            flex-direction: column;
            gap: 12px;
        }
        .news-date-box {
            align-self: flex-start;
        }
        .section-head h2 {
            font-size: 24px;
        }
        .faq-item summary {
            padding: 18px 20px;
            font-size: 15px;
        }
        .faq-item .faq-body {
            padding: 16px 20px;
            font-size: 14px;
        }
        .footer-top {
            grid-template-columns: 1fr;
        }
    }

/* roulang page: category1 */
:root {
            --primary: #4f46e5;
            --primary-light: #818cf8;
            --primary-dark: #3730a3;
            --accent: #f59e0b;
            --bg: #f8fafc;
            --surface: #ffffff;
            --text: #1e293b;
            --muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --shadow-sm: 0 2px 8px rgba(30, 41, 59, 0.06);
            --shadow-md: 0 10px 30px rgba(30, 41, 59, 0.08);
            --shadow-lg: 0 20px 50px rgba(30, 41, 59, 0.14);
            --container: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
        }

        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
            background: none;
            cursor: pointer;
        }

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

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(30, 41, 59, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 78px;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text);
            transition: opacity 0.2s ease;
            flex-shrink: 0;
        }

        .logo:hover {
            opacity: 0.8;
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 900;
            font-size: 1.2rem;
            box-shadow: 0 6px 16px rgba(79, 70, 229, 0.3);
        }

        .nav-group {
            display: flex;
            align-items: center;
            gap: 8px;
            min-height: 40px;
        }

        .nav-link {
            padding: 9px 16px;
            border-radius: 10px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--muted);
            transition: all 0.22s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(79, 70, 229, 0.06);
        }

        .nav-link.active {
            color: var(--primary);
            background: rgba(79, 70, 229, 0.1);
            font-weight: 600;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            border-radius: 12px;
            transition: all 0.25s ease;
            text-align: center;
            white-space: nowrap;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(79, 70, 229, 0.35);
            outline-offset: 2px;
        }

        .btn-primary {
            background: linear-gradient(135deg, #4f46e5, #3730a3);
            color: #fff;
            box-shadow: 0 8px 20px rgba(79, 70, 229, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(79, 70, 229, 0.4);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
        }

        .btn-outline {
            border: 2px solid var(--border);
            background: var(--surface);
            color: var(--text);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(79, 70, 229, 0.04);
        }

        .btn-light {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
        }

        .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.16);
        }

        .btn-lg {
            padding: 15px 30px;
            font-size: 1.02rem;
        }

        .btn-sm {
            padding: 9px 18px;
            font-size: 0.88rem;
        }

        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: var(--text);
            background: rgba(226, 232, 240, 0.5);
            transition: background 0.2s ease;
        }

        .menu-toggle:hover {
            background: rgba(226, 232, 240, 0.9);
        }

        .mobile-menu {
            display: none;
            padding: 16px 24px 24px;
            background: var(--surface);
            border-top: 1px solid var(--border);
        }

        .mobile-menu.open {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        /* Page Hero */
        .page-hero {
            position: relative;
            background-size: cover;
            background-position: center;
            background-color: #1e1b4b;
            color: #fff;
            padding: 90px 0 80px;
            isolation: isolate;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(30, 27, 75, 0.94), rgba(79, 70, 229, 0.7));
            z-index: -1;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 28px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            transition: color 0.2s ease;
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .breadcrumb i {
            font-size: 0.7rem;
            color: rgba(255, 255, 255, 0.5);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 14px;
            border-radius: 999px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        .badge-accent {
            background: rgba(245, 158, 11, 0.16);
            color: #fbbf24;
            border: 1px solid rgba(245, 158, 11, 0.35);
        }

        .badge-light {
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }

        .badge-brand {
            background: rgba(79, 70, 229, 0.1);
            color: var(--primary);
            border: 1px solid rgba(79, 70, 229, 0.2);
        }

        .hero-content h1 {
            font-size: 2.9rem;
            font-weight: 800;
            line-height: 1.2;
            margin: 20px 0 18px;
            letter-spacing: -0.02em;
            max-width: 660px;
        }

        .hero-content p {
            font-size: 1.12rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 32px;
        }

        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: 56px;
        }

        .stat-card {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.16);
            backdrop-filter: blur(8px);
            border-radius: 16px;
            padding: 22px 20px;
            text-align: center;
            transition: all 0.3s ease;
        }

        .stat-card:hover {
            background: rgba(255, 255, 255, 0.16);
            transform: translateY(-4px);
        }

        .stat-number {
            font-size: 1.9rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

        .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 4px;
        }

        /* Section Common */
        .section {
            padding: 90px 0;
        }

        .section-alt {
            background: var(--surface);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 16px;
            border-radius: 999px;
            background: rgba(79, 70, 229, 0.08);
            color: var(--primary);
            font-size: 0.84rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: 2.15rem;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            color: var(--text);
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--muted);
            max-width: 640px;
            line-height: 1.8;
            margin-top: 12px;
        }

        .section-head {
            margin-bottom: 48px;
        }

        .section-head.center {
            text-align: center;
        }

        .section-head.center .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

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

        .feature-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 36px 30px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-card::after {
            content: "";
            position: absolute;
            top: -40px;
            right: -40px;
            width: 90px;
            height: 90px;
            border-radius: 50%;
            background: rgba(79, 70, 229, 0.06);
            transition: transform 0.4s ease;
        }

        .feature-card:hover {
            border-color: rgba(79, 70, 229, 0.2);
            box-shadow: var(--shadow-md);
            transform: translateY(-6px);
        }

        .feature-card:hover::after {
            transform: scale(2.2);
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            background: linear-gradient(135deg, #e0e7ff, #c7d2fe);
            color: var(--primary);
            margin-bottom: 20px;
            transition: all 0.3s ease;
        }

        .feature-card:hover .feature-icon {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 8px 20px rgba(79, 70, 229, 0.3);
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .feature-card p {
            color: var(--muted);
            font-size: 0.95rem;
            line-height: 1.75;
        }

        /* Url Grid */
        .url-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }

        .url-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 20px;
            overflow: hidden;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .url-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-6px);
            border-color: rgba(79, 70, 229, 0.22);
        }

        .url-card-cover {
            position: relative;
            height: 180px;
            overflow: hidden;
            background: #eef2ff;
        }

        .url-card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .url-card:hover .url-card-cover img {
            transform: scale(1.06);
        }

        .url-card-body {
            padding: 26px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .url-card-tags {
            display: flex;
            gap: 8px;
            margin-bottom: 12px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 0.78rem;
            font-weight: 600;
            background: rgba(79, 70, 229, 0.08);
            color: var(--primary);
        }

        .url-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }

        .url-card ul {
            list-style: none;
            margin-top: 10px;
        }

        .url-card ul li {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 5px 0;
            font-size: 0.9rem;
            color: var(--muted);
        }

        .url-card ul li i {
            color: var(--primary-light);
            font-size: 0.75rem;
        }

        .url-card-more {
            margin-top: auto;
            padding-top: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--primary);
            transition: gap 0.2s ease;
        }

        .url-card-more:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

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

        .content-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 18px;
            overflow: hidden;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .content-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .content-card-img {
            height: 150px;
            overflow: hidden;
        }

        .content-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .content-card:hover .content-card-img img {
            transform: scale(1.06);
        }

        .content-card-body {
            padding: 20px 20px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .content-card .date {
            font-size: 0.78rem;
            color: var(--muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .content-card h3 {
            font-size: 1.02rem;
            font-weight: 700;
            line-height: 1.45;
            margin: 10px 0 8px;
        }

        .content-card p {
            font-size: 0.88rem;
            color: var(--muted);
            line-height: 1.7;
            flex: 1;
        }

        .content-card-link {
            margin-top: 14px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.2s ease;
        }

        .content-card-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* Steps */
        .step-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 26px;
            counter-reset: step;
        }

        .step-card {
            position: relative;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 34px 26px 28px;
            transition: all 0.3s ease;
        }

        .step-card:hover {
            border-color: rgba(79, 70, 229, 0.25);
            box-shadow: var(--shadow-md);
            transform: translateY(-6px);
        }

        .step-num {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 16px;
        }

        .step-card h3 {
            font-size: 1.08rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 0.92rem;
            color: var(--muted);
            line-height: 1.7;
        }

        /* Safety Section */
        .safety-wrap {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 24px;
            overflow: hidden;
            display: grid;
            grid-template-columns: 1fr 1fr;
            box-shadow: var(--shadow-sm);
        }

        .safety-visual {
            background: linear-gradient(150deg, #1e1b4b, #312e81);
            padding: 48px 40px;
            color: #fff;
            min-height: 420px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .safety-visual h2 {
            font-size: 1.6rem;
            font-weight: 800;
            margin: 16px 0 14px;
        }

        .safety-visual p {
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.8;
        }

        .safety-points {
            padding: 40px 36px;
            display: flex;
            flex-direction: column;
            gap: 26px;
            justify-content: center;
        }

        .safety-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 18px 20px;
            border: 1px solid var(--border);
            border-radius: 16px;
            transition: all 0.3s ease;
            background: var(--bg);
        }

        .safety-item:hover {
            border-color: rgba(79, 70, 229, 0.25);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        .safety-icon {
            width: 44px;
            height: 44px;
            flex-shrink: 0;
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            background: rgba(79, 70, 229, 0.1);
            color: var(--primary);
        }

        .safety-item h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .safety-item p {
            font-size: 0.88rem;
            color: var(--muted);
            line-height: 1.6;
        }

        /* FAQ */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 16px;
            overflow: hidden;
            transition: border-color 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(79, 70, 229, 0.25);
        }

        .faq-item.open {
            border-color: rgba(79, 70, 229, 0.4);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 20px 26px;
            font-size: 1.02rem;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            transition: background 0.2s ease;
        }

        .faq-question:hover {
            background: rgba(79, 70, 229, 0.03);
        }

        .faq-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(79, 70, 229, 0.1);
            color: var(--primary);
            font-size: 0.85rem;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-answer-inner {
            padding: 0 26px 22px;
            color: var(--muted);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #1e1b4b, #3730a3);
            color: #fff;
            border-radius: 28px;
            padding: 60px 50px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -70px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(245, 158, 11, 0.14);
        }

        .cta-section::after {
            content: "";
            position: absolute;
            bottom: -90px;
            left: -50px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
        }

        .cta-section h2 {
            font-size: 2.1rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            position: relative;
            z-index: 1;
        }

        .cta-section > p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.05rem;
            margin: 14px auto 32px;
            max-width: 520px;
            position: relative;
            z-index: 1;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        /* Footer */
        .site-footer {
            background: #fff;
            border-top: 1px solid var(--border);
            padding-top: 70px;
            margin-top: 90px;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 50px;
        }

        .footer-brand .logo {
            margin-bottom: 18px;
        }

        .footer-brand p {
            color: var(--muted);
            font-size: 0.94rem;
            line-height: 1.8;
            max-width: 420px;
        }

        .footer-col h4 {
            font-size: 1.02rem;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--text);
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul li a {
            color: var(--muted);
            font-size: 0.92rem;
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-col ul li a:hover {
            color: var(--primary);
            transform: translateX(2px);
        }

        .footer-col ul li a i {
            font-size: 0.7rem;
            color: var(--primary-light);
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 22px 0;
            text-align: center;
            color: var(--muted);
            font-size: 0.88rem;
            background: #f8fafc;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-content h1 {
                font-size: 2.4rem;
            }
            .featured-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }
            .nav-group.nav-left,
            .nav-group.nav-right .btn {
                display: none;
            }
            .menu-toggle {
                display: inline-flex;
            }
            .nav-group.nav-right {
                margin-left: auto;
            }
            .page-hero {
                padding: 60px 0 56px;
            }
            .hero-content h1 {
                font-size: 1.9rem;
            }
            .hero-content p {
                font-size: 1rem;
            }
            .section {
                padding: 64px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .feature-grid,
            .url-grid,
            .step-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .safety-wrap {
                grid-template-columns: 1fr;
            }
            .safety-visual {
                min-height: 0;
                padding: 36px 28px;
            }
            .safety-points {
                padding: 28px 20px;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .cta-section {
                padding: 44px 28px;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }
            .hero-stats {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card {
                padding: 16px 12px;
            }
            .stat-number {
                font-size: 1.5rem;
            }
            .feature-grid,
            .url-grid,
            .step-grid,
            .featured-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                font-size: 0.82rem;
                line-height: 1.7;
            }
            .faq-question {
                padding: 17px 18px;
                font-size: 0.95rem;
            }
            .faq-answer-inner {
                padding: 0 18px 18px;
            }
            .cta-actions .btn {
                width: 100%;
            }
        }

/* roulang page: article */
:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #dbeafe;
    --secondary: #0891b2;
    --secondary-light: #cffafe;
    --accent: #f59e0b;
    --accent-light: #fef3c7;
    --dark: #0f172a;
    --text: #1e293b;
    --muted: #64748b;
    --bg: #f8fafc;
    --surface: #ffffff;
    --border: #e2e8f0;
    --radius: 18px;
    --radius-sm: 10px;
    --shadow-sm: 0 2px 10px rgba(15, 23, 42, .06);
    --shadow: 0 6px 30px rgba(15, 23, 42, .08);
    --shadow-lg: 0 16px 50px rgba(15, 23, 42, .12);
    --transition: all .3s ease;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}
img {
    max-width: 100%;
    display: block;
}
a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}
button {
    cursor: pointer;
    font-family: inherit;
}
a:focus-visible,
button:focus-visible {
    outline: 3px solid rgba(37, 99, 235, .45);
    outline-offset: 2px;
}
.container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
}
.section-padding {
    padding: 72px 0;
}
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, .86);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
}
.header-inner {
    display: flex;
    align-items: center;
    height: 72px;
    gap: 16px;
}
.nav-left {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 6px;
}
.nav-right {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
}
.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    white-space: nowrap;
}
.nav-link:hover {
    color: var(--primary);
    background: var(--primary-light);
}
.nav-link.active {
    color: var(--primary);
    font-weight: 600;
    background: rgba(37, 99, 235, .08);
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    flex-shrink: 0;
}
.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--primary);
    color: #fff;
    font-size: 18px;
    font-weight: 800;
    box-shadow: 0 4px 12px rgba(37, 99, 235, .35);
}
.logo-text {
    letter-spacing: -0.01em;
}
.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: var(--text);
    transition: var(--transition);
}
.menu-toggle:hover {
    background: var(--primary-light);
    color: var(--primary);
}
.mobile-menu {
    display: none;
    padding: 12px 20px 20px;
    border-top: 1px solid var(--border);
    background: var(--surface);
}
.mobile-menu.open {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.mobile-link {
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
}
.mobile-link:hover,
.mobile-link.active {
    background: var(--primary-light);
    color: var(--primary);
}
.article-hero {
    position: relative;
    padding: 84px 0 76px;
    background: linear-gradient(135deg, rgba(2, 6, 23, .92), rgba(30, 64, 175, .78)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    text-align: center;
    color: #fff;
    overflow: hidden;
}
.article-hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 40%, rgba(245, 158, 11, .22), transparent 45%);
    pointer-events: none;
}
.article-hero .container {
    position: relative;
    z-index: 2;
}
.breadcrumb {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: rgba(255, 255, 255, .75);
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.breadcrumb a {
    color: rgba(255, 255, 255, .9);
}
.breadcrumb a:hover {
    color: #fff;
    text-decoration: underline;
}
.breadcrumb-sep {
    color: rgba(255, 255, 255, .45);
}
.breadcrumb-current {
    color: #fff;
    font-weight: 500;
    max-width: 70%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.article-title {
    font-size: clamp(1.8rem, 4vw, 3rem);
    font-weight: 800;
    line-height: 1.25;
    margin: 0 auto 18px;
    max-width: 820px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, .3);
}
.article-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 18px;
}
.meta-item {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 14px;
    color: rgba(255, 255, 255, .85);
}
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    background: var(--accent);
    color: #0f172a;
    box-shadow: 0 4px 14px rgba(245, 158, 11, .35);
}
.body-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 32px;
    align-items: start;
}
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 32px;
}
.article-content {
    font-size: 16px;
    line-height: 1.9;
    color: var(--text);
    word-break: break-word;
}
.article-content h2 {
    font-size: 1.55rem;
    font-weight: 700;
    line-height: 1.4;
    margin: 2.2rem 0 1rem;
    padding-left: 14px;
    border-left: 4px solid var(--primary);
    color: var(--dark);
}
.article-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 1.8rem 0 .75rem;
    color: var(--dark);
}
.article-content h4 {
    font-size: 1.08rem;
    font-weight: 600;
    margin: 1.4rem 0 .6rem;
    color: var(--dark);
}
.article-content p {
    margin-bottom: 1.25rem;
}
.article-content a {
    color: var(--primary);
    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 3px;
}
.article-content ul,
.article-content ol {
    margin: 0 0 1.25rem 1.4rem;
}
.article-content li {
    margin-bottom: .4rem;
}
.article-content blockquote {
    margin: 1.5rem 0;
    padding: 16px 20px;
    border-left: 4px solid var(--secondary);
    background: var(--secondary-light);
    border-radius: 0 12px 12px 0;
    color: var(--dark);
}
.article-content code {
    background: #f1f5f9;
    padding: 2px 8px;
    border-radius: 6px;
    font-size: .9em;
    font-family: "SFMono-Regular", Consolas, monospace;
}
.article-content img {
    border-radius: 12px;
    margin: 1.5rem 0;
    box-shadow: var(--shadow-sm);
}
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 15px;
}
.article-content table th,
.article-content table td {
    border: 1px solid var(--border);
    padding: 10px 14px;
    text-align: left;
}
.article-content table th {
    background: var(--bg);
    font-weight: 600;
    color: var(--dark);
}
.article-footer-nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 28px;
    padding-top: 22px;
    border-top: 1px solid var(--border);
}
.tag-label {
    font-size: 13px;
    color: var(--muted);
}
.tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    background: var(--primary-light);
    color: var(--primary);
}
.not-found-card {
    text-align: center;
    padding: 60px 32px;
}
.not-found-icon {
    font-size: 48px;
    color: var(--muted);
    margin-bottom: 16px;
}
.not-found-card h2 {
    font-size: 1.6rem;
    color: var(--dark);
    margin-bottom: 10px;
}
.not-found-card p {
    color: var(--muted);
    margin-bottom: 24px;
}
.article-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: sticky;
    top: 96px;
}
.sidebar-card {
    padding: 24px;
}
.sidebar-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 8px;
}
.sidebar-title::before {
    content: '';
    width: 4px;
    height: 18px;
    border-radius: 4px;
    background: var(--primary);
}
.sidebar-list {
    list-style: none;
}
.sidebar-list li + li {
    margin-top: 6px;
}
.sidebar-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 10px 12px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    background: var(--bg);
}
.sidebar-list a:hover {
    background: var(--primary-light);
    color: var(--primary);
    transform: translateX(4px);
}
.sidebar-list a::after {
    content: '→';
    color: var(--muted);
    flex-shrink: 0;
}
.sidebar-post {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px dashed var(--border);
}
.sidebar-post:last-child {
    border-bottom: none;
}
.sidebar-post:hover .sidebar-post-title {
    color: var(--primary);
}
.sidebar-post-index {
    flex-shrink: 0;
    font-size: 13px;
    font-weight: 700;
    color: var(--muted);
    background: var(--bg);
    width: 28px;
    height: 28px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.sidebar-post-title {
    font-size: 14px;
    line-height: 1.45;
    color: var(--text);
}
.sidebar-empty {
    font-size: 14px;
    color: var(--muted);
    padding: 8px 0;
}
.section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 36px;
}
.section-eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
}
.section-title {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    color: var(--dark);
    line-height: 1.25;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.related-card {
    display: block;
    overflow: hidden;
    border-radius: var(--radius);
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}
.related-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(37, 99, 235, .3);
}
.related-cover {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--primary-light);
}
.related-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s ease;
}
.related-card:hover .related-cover img {
    transform: scale(1.05);
}
.related-cat {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    background: rgba(15, 23, 42, .72);
    color: #fff;
    backdrop-filter: blur(6px);
}
.related-info {
    padding: 20px 20px 24px;
}
.related-info h3 {
    font-size: 16px;
    font-weight: 700;
    line-height: 1.45;
    color: var(--dark);
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-info p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.6;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-date {
    font-size: 13px;
    color: var(--muted);
}
.empty-tip {
    grid-column: 1 / -1;
    text-align: center;
    padding: 40px;
    background: var(--surface);
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    color: var(--muted);
    font-size: 15px;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    border: 1px solid transparent;
    transition: all .3s ease;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 6px 20px rgba(37, 99, 235, .3);
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 10px 26px rgba(37, 99, 235, .4);
}
.btn-outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}
.btn-outline:hover {
    background: var(--primary-light);
}
.btn-light {
    background: #fff;
    color: #0f172a;
    box-shadow: 0 6px 20px rgba(255, 255, 255, .15);
}
.btn-light:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 255, 255, .25);
}
.btn-ghost {
    background: rgba(255, 255, 255, .12);
    color: #fff;
    border-color: rgba(255, 255, 255, .3);
    backdrop-filter: blur(8px);
}
.btn-ghost:hover {
    background: rgba(255, 255, 255, .22);
    transform: translateY(-2px);
}
.cta-section {
    background: linear-gradient(135deg, #1e3a8a, #2563eb);
    position: relative;
    overflow: hidden;
}
.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 80% 20%, rgba(245, 158, 11, .2), transparent 45%);
}
.cta-inner {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 40px 20px;
}
.cta-inner h2 {
    color: #fff;
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    margin-bottom: 14px;
}
.cta-inner p {
    color: rgba(255, 255, 255, .85);
    max-width: 640px;
    margin: 0 auto 28px;
    font-size: 16px;
}
.cta-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}
.site-footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 64px 0 0;
}
.footer-top {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, .08);
}
.footer-brand .logo {
    color: #fff;
    font-size: 20px;
}
.footer-brand .logo-icon {
    background: var(--primary);
    box-shadow: 0 4px 12px rgba(37, 99, 235, .35);
}
.footer-brand p {
    margin-top: 16px;
    font-size: 14px;
    line-height: 1.75;
    color: #94a3b8;
}
.footer-col h4 {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 16px;
}
.footer-col ul {
    list-style: none;
}
.footer-col li {
    margin-bottom: 10px;
}
.footer-col a {
    font-size: 14px;
    color: #94a3b8;
}
.footer-col a:hover {
    color: #fff;
    padding-left: 4px;
}
.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 14px;
    color: #64748b;
}
@media (max-width: 1024px) {
    .body-grid {
        grid-template-columns: 1fr;
    }
    .article-sidebar {
        position: static;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 768px) {
    .section-padding {
        padding: 48px 0;
    }
    .article-hero {
        padding: 56px 0 48px;
    }
    .nav-left,
    .nav-right {
        display: none;
    }
    .menu-toggle {
        display: inline-flex;
    }
    .header-inner {
        height: 64px;
    }
    .container {
        padding: 0 20px;
    }
    .article-content {
        font-size: 15px;
    }
    .card {
        padding: 24px;
    }
    .section-head {
        flex-direction: column;
        align-items: flex-start;
    }
    .article-sidebar {
        grid-template-columns: 1fr;
    }
    .footer-top {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .breadcrumb-current {
        max-width: 100%;
        white-space: normal;
    }
}
@media (max-width: 520px) {
    .related-grid {
        grid-template-columns: 1fr;
    }
    .cta-actions .btn {
        width: 100%;
    }
    .article-title {
        max-width: 100%;
        font-size: 1.6rem;
    }
    .article-meta {
        gap: 12px;
    }
}

/* roulang page: category2 */
:root {
            --primary: #4F46E5;
            --primary-dark: #4338CA;
            --accent: #06B6D4;
            --bg: #F8FAFC;
            --surface: #FFFFFF;
            --text: #0F172A;
            --muted: #64748B;
            --border: #E2E8F0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 16px 48px rgba(79, 70, 229, 0.12);
            --container: 1200px;
            --space: 96px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease, box-shadow .25s ease, background .25s ease, border-color .25s ease, transform .25s ease;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
            outline: none;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 96px 0;
        }
        .section-head {
            max-width: 720px;
            margin: 0 auto 56px;
            text-align: center;
        }
        .section-tag {
            display: inline-block;
            background: rgba(79, 70, 229, 0.08);
            color: var(--primary);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 2px;
            text-transform: uppercase;
            padding: 6px 16px;
            border-radius: 100px;
            margin-bottom: 16px;
        }
        .section-head h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }
        .section-head p {
            color: var(--muted);
            font-size: 17px;
            line-height: 1.8;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            box-shadow: 0 1px 20px rgba(15, 23, 42, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }
        .nav-group {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 16px;
            font-size: 15px;
            font-weight: 600;
            color: #475569;
            border-radius: 100px;
            transition: all .25s ease;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(79, 70, 229, 0.06);
        }
        .nav-link.active {
            color: var(--primary);
            background: rgba(79, 70, 229, 0.1);
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            padding: 0 8px;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 10px;
            color: #fff;
            font-weight: 800;
            font-size: 20px;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
        }
        .logo span:last-child {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text);
        }
        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            background: rgba(79, 70, 229, 0.06);
            color: var(--primary);
            font-size: 18px;
            cursor: pointer;
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            padding: 12px 24px 20px;
            background: #fff;
            border-top: 1px solid var(--border);
        }
        .mobile-menu.show {
            display: flex;
        }
        .mobile-link {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            color: #475569;
        }
        .mobile-link:hover {
            background: rgba(79, 70, 229, 0.06);
            color: var(--primary);
        }
        .mobile-link.active {
            background: rgba(79, 70, 229, 0.1);
            color: var(--primary);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 560px;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            padding: 100px 0;
            overflow: hidden;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(15, 23, 42, 0.9) 0%, rgba(15, 23, 42, 0.6) 50%, rgba(6, 182, 212, 0.35) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 760px;
        }
        .badge-hero {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 3px;
            padding: 7px 18px;
            border-radius: 100px;
            margin-bottom: 22px;
            backdrop-filter: blur(6px);
        }
        .hero-content h1 {
            font-size: clamp(32px, 5vw, 54px);
            font-weight: 900;
            line-height: 1.15;
            color: #fff;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }
        .hero-content h1 span {
            background: linear-gradient(90deg, #A5B4FC, #22D3EE);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-content p {
            font-size: 17px;
            color: rgba(226, 232, 240, 0.85);
            line-height: 1.8;
            max-width: 600px;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 100px;
            font-weight: 700;
            font-size: 15px;
            cursor: pointer;
            transition: all .25s ease;
            border: 1px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 20px rgba(79, 70, 229, 0.35);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(79, 70, 229, 0.4);
        }
        .btn-ghost {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.3);
            backdrop-filter: blur(8px);
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.2);
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-2px);
        }

        /* ===== Feature ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--surface);
            border: 1px solid rgba(226, 232, 240, 0.8);
            border-radius: var(--radius);
            padding: 36px 30px;
            transition: all .3s ease;
            box-shadow: 0 4px 16px rgba(15, 23, 42, 0.04);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(79, 70, 229, 0.15);
        }
        .feature-card .f-icon {
            width: 54px;
            height: 54px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(6, 182, 212, 0.1));
            border-radius: 14px;
            color: var(--primary);
            font-size: 22px;
            margin-bottom: 20px;
        }
        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-card p {
            color: var(--muted);
            font-size: 15px;
            line-height: 1.75;
        }

        /* ===== Tools ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .tool-card {
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid rgba(226, 232, 240, 0.8);
            transition: all .3s ease;
            box-shadow: 0 4px 16px rgba(15, 23, 42, 0.04);
            display: flex;
            flex-direction: column;
        }
        .tool-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(79, 70, 229, 0.15);
        }
        .tool-thumb {
            height: 200px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .tool-thumb::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(15, 23, 42, 0.35));
        }
        .tool-info {
            padding: 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .badge {
            display: inline-block;
            background: rgba(79, 70, 229, 0.08);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            padding: 5px 12px;
            border-radius: 100px;
            margin-bottom: 14px;
            width: fit-content;
        }
        .tool-info h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .tool-info p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 18px;
            flex: 1;
        }
        .tool-link {
            color: var(--primary);
            font-weight: 700;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .tool-link:hover {
            gap: 10px;
        }

        /* ===== Process ===== */
        .process-section {
            background: var(--surface);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            position: relative;
            padding: 32px 24px;
            border-radius: var(--radius);
            background: var(--bg);
            border: 1px solid var(--border);
            text-align: center;
            transition: all .3s ease;
        }
        .step-card:hover {
            background: rgba(79, 70, 229, 0.04);
            border-color: rgba(79, 70, 229, 0.2);
            transform: translateY(-4px);
        }
        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-weight: 800;
            font-size: 18px;
            margin-bottom: 18px;
            box-shadow: 0 6px 18px rgba(79, 70, 229, 0.3);
        }
        .step-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-card p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.7;
        }

        /* ===== Stats ===== */
        .stats-section {
            background: linear-gradient(135deg, #0F172A 0%, #1E1B4B 100%);
            padding: 80px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stat-item .num {
            font-size: clamp(32px, 4vw, 48px);
            font-weight: 900;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.02em;
        }
        .stat-item .num span {
            color: #22D3EE;
        }
        .stat-item .label {
            margin-top: 8px;
            color: rgba(226, 232, 240, 0.7);
            font-size: 15px;
        }
        .stat-item .desc {
            margin-top: 4px;
            color: rgba(226, 232, 240, 0.5);
            font-size: 13px;
        }

        /* ===== Security List ===== */
        .security-section {
            background: var(--bg);
        }
        .security-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .security-media {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .security-media img {
            width: 100%;
            height: 380px;
            object-fit: cover;
        }
        .security-list {
            list-style: none;
        }
        .security-list li {
            display: flex;
            gap: 16px;
            padding: 18px 0;
            border-bottom: 1px solid var(--border);
        }
        .security-list li:last-child {
            border-bottom: none;
        }
        .security-list .check {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(79, 70, 229, 0.1);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            margin-top: 4px;
        }
        .security-list h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .security-list p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            padding: 0 24px;
            transition: all .25s ease;
        }
        .faq-item:hover {
            border-color: rgba(79, 70, 229, 0.2);
        }
        .faq-item summary {
            padding: 22px 0;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: "+";
            font-size: 22px;
            font-weight: 400;
            color: var(--primary);
            flex-shrink: 0;
            transition: transform .3s ease;
        }
        .faq-item[open] summary::after {
            transform: rotate(45deg);
        }
        .faq-item p {
            padding: 0 0 22px;
            color: var(--muted);
            font-size: 15px;
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
        }
        .cta-box {
            background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
            border-radius: 24px;
            padding: 60px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 16px 48px rgba(79, 70, 229, 0.3);
        }
        .cta-box::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
        }
        .cta-box::after {
            content: "";
            position: absolute;
            bottom: -80px;
            left: 40px;
            width: 160px;
            height: 160px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
        }
        .cta-box h2 {
            font-size: clamp(26px, 3vw, 38px);
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-box p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 17px;
            max-width: 560px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
        }
        .cta-box .btn-white {
            background: #fff;
            color: var(--primary);
            position: relative;
            z-index: 1;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
        }
        .cta-box .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.16);
            background: #F1F5F9;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0B1120;
            color: #94A3B8;
            padding: 64px 0 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .logo {
            margin-bottom: 16px;
        }
        .footer-brand .logo span:last-child {
            color: #fff;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 380px;
            color: rgba(148, 163, 184, 0.8);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            font-size: 14px;
            color: #94A3B8;
            padding: 4px 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col a:hover {
            color: #A5B4FC;
        }
        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(148, 163, 184, 0.6);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-3,
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .security-wrap {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            :root {
                --space: 64px;
            }
            .section {
                padding: 64px 0;
            }
            .header-inner {
                justify-content: space-between;
            }
            .nav-group {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .logo span:last-child {
                font-size: 19px;
            }
            .hero {
                min-height: 480px;
                padding: 72px 0;
                text-align: center;
            }
            .hero-content p {
                margin-left: auto;
                margin-right: auto;
            }
            .hero-actions {
                justify-content: center;
            }
            .grid-3,
            .card-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cta-box {
                padding: 44px 24px;
                border-radius: 16px;
            }
            .security-media img {
                height: 260px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .header-inner {
                height: 64px;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 17px;
            }
            .logo span:last-child {
                font-size: 17px;
            }
            .hero-content h1 {
                font-size: 30px;
            }
            .hero-content p {
                font-size: 15px;
            }
            .btn {
                padding: 12px 22px;
                font-size: 14px;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .feature-card {
                padding: 28px 22px;
            }
            .tool-card {
                border-radius: 14px;
            }
            .tool-thumb {
                height: 180px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                font-size: 12px;
                line-height: 1.6;
            }
        }

/* roulang page: category3 */
/* ===== 设计变量与基础 Reset ===== */
    :root {
        --primary: #4f46e5;
        --primary-dark: #4338ca;
        --accent: #06b6d4;
        --bg-light: #f8fafc;
        --bg-dark: #0f172a;
        --text-main: #1e293b;
        --text-weak: #64748b;
        --border-color: #e2e8f0;
        --card-bg: #ffffff;
        --radius-lg: 1rem;
        --radius-xl: 1.5rem;
        --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06), 0 1px 3px rgba(15, 23, 42, .1);
        --shadow-md: 0 4px 12px rgba(15, 23, 42, .08), 0 2px 4px rgba(15, 23, 42, .06);
        --shadow-lg: 0 12px 32px rgba(15, 23, 42, .12), 0 4px 8px rgba(15, 23, 42, .08);
        --transition: all .25s ease;
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        color: var(--text-main);
        background: var(--bg-light);
        line-height: 1.6;
        -webkit-font-smoothing: antialiased;
    }

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

    a {
        color: inherit;
        text-decoration: none;
    }

    button {
        cursor: pointer;
        font-family: inherit;
    }

    .container {
        max-width: 1240px;
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ===== 顶部导航 ===== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 50;
        background: rgba(255, 255, 255, .92);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid rgba(226, 232, 240, .8);
        box-shadow: 0 1px 0 rgba(255, 255, 255, .5);
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 72px;
        position: relative;
        gap: 16px;
    }

    .logo {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        font-size: 1.35rem;
        font-weight: 800;
        letter-spacing: .5px;
        color: var(--text-main);
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        white-space: nowrap;
        z-index: 2;
    }

    .logo-icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 40px;
        height: 40px;
        border-radius: 12px;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        color: #fff;
        font-weight: 800;
        font-size: 1.1rem;
        box-shadow: 0 4px 12px rgba(79, 70, 229, .35);
    }

    .nav-group {
        display: flex;
        align-items: center;
        gap: 4px;
    }

    .nav-link {
        display: inline-flex;
        align-items: center;
        padding: 8px 14px;
        border-radius: 10px;
        font-size: 0.925rem;
        font-weight: 500;
        color: var(--text-main);
        transition: var(--transition);
        border: 1px solid transparent;
    }

    .nav-link:hover,
    .nav-link:focus-visible {
        background: #f1f5f9;
        color: var(--primary);
        outline: 2px solid var(--primary);
        outline-offset: 2px;
    }

    .nav-link.active {
        background: var(--primary);
        color: #fff;
        box-shadow: 0 4px 12px rgba(79, 70, 229, .3);
    }

    .mobile-toggle {
        display: none;
        background: none;
        border: 1px solid var(--border-color);
        border-radius: 10px;
        width: 42px;
        height: 42px;
        font-size: 1.2rem;
        color: var(--text-main);
        align-items: center;
        justify-content: center;
        transition: var(--transition);
        z-index: 3;
    }

    .mobile-toggle:hover {
        background: #f1f5f9;
    }

    .mobile-menu {
        display: none;
    }

    /* ===== Hero Banner ===== */
    .page-banner {
        position: relative;
        padding: 120px 0 90px;
        background-image: url('/assets/images/backpic/back-1.png');
        background-size: cover;
        background-position: center;
        background-attachment: fixed;
    }

    .page-banner::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(15, 23, 42, .82), rgba(30, 27, 75, .72), rgba(6, 182, 212, .55));
    }

    .page-banner .container {
        position: relative;
        z-index: 2;
    }

    .breadcrumb {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: .875rem;
        color: rgba(255, 255, 255, .75);
        margin-bottom: 24px;
    }

    .breadcrumb a {
        color: rgba(255, 255, 255, .85);
        transition: var(--transition);
    }

    .breadcrumb a:hover {
        color: #fff;
        text-decoration: underline;
    }

    .banner-title {
        font-size: 3rem;
        font-weight: 800;
        color: #fff;
        line-height: 1.2;
        letter-spacing: -.02em;
        margin-bottom: 18px;
        text-shadow: 0 2px 20px rgba(0, 0, 0, .3);
    }

    .banner-subtitle {
        font-size: 1.125rem;
        color: rgba(255, 255, 255, .82);
        max-width: 680px;
        line-height: 1.7;
    }

    .banner-search {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-top: 36px;
        max-width: 560px;
        background: #fff;
        border-radius: 60px;
        padding: 6px 6px 6px 22px;
        box-shadow: 0 12px 40px rgba(0, 0, 0, .2);
        border: 2px solid transparent;
        transition: var(--transition);
    }

    .banner-search:focus-within {
        border-color: var(--accent);
        box-shadow: 0 12px 40px rgba(6, 182, 212, .25);
    }

    .banner-search i {
        color: var(--text-weak);
    }

    .banner-search input {
        flex: 1;
        border: none;
        outline: none;
        background: transparent;
        font-size: .95rem;
        color: var(--text-main);
        min-width: 0;
    }

    .banner-search button {
        background: var(--primary);
        color: #fff;
        border: none;
        border-radius: 50px;
        padding: 10px 24px;
        font-weight: 600;
        font-size: .9rem;
        transition: var(--transition);
        white-space: nowrap;
    }

    .banner-search button:hover {
        background: var(--primary-dark);
        transform: translateY(-1px);
    }

    /* ===== 统计面板 ===== */
    .stats-section {
        margin-top: -48px;
        position: relative;
        z-index: 5;
    }

    .stats-card {
        background: #fff;
        border-radius: var(--radius-xl);
        box-shadow: var(--shadow-lg);
        border: 1px solid rgba(226, 232, 240, .6);
        padding: 40px 24px;
        text-align: center;
        transition: var(--transition);
        height: 100%;
    }

    .stats-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 20px 40px rgba(15, 23, 42, .15);
    }

    .stats-number {
        font-size: 2.5rem;
        font-weight: 800;
        color: var(--primary);
        line-height: 1.2;
        margin-bottom: 6px;
    }

    .stats-label {
        color: var(--text-weak);
        font-size: .95rem;
        font-weight: 500;
    }

    /* ===== 板块通用 ===== */
    .section-padding {
        padding: 90px 0;
    }

    .section-title-wrap {
        text-align: center;
        max-width: 720px;
        margin: 0 auto 50px;
    }

    .section-tag {
        display: inline-block;
        padding: 5px 16px;
        border-radius: 30px;
        font-size: .8rem;
        font-weight: 600;
        color: var(--primary);
        background: rgba(79, 70, 229, .08);
        border: 1px solid rgba(79, 70, 229, .15);
        margin-bottom: 16px;
    }

    .section-title {
        font-size: 2.2rem;
        font-weight: 800;
        line-height: 1.3;
        letter-spacing: -.01em;
        color: var(--text-main);
        margin-bottom: 14px;
    }

    .section-subtitle {
        color: var(--text-weak);
        font-size: 1.02rem;
        line-height: 1.7;
    }

    /* ===== 分类卡片 ===== */
    .cat-card {
        background: var(--card-bg);
        border-radius: var(--radius-xl);
        overflow: hidden;
        border: 1px solid rgba(226, 232, 240, .8);
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        height: 100%;
        display: flex;
        flex-direction: column;
    }

    .cat-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
        border-color: rgba(79, 70, 229, .25);
    }

    .cat-card-img {
        height: 190px;
        overflow: hidden;
        position: relative;
    }

    .cat-card-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform .5s ease;
    }

    .cat-card:hover .cat-card-img img {
        transform: scale(1.06);
    }

    .cat-card-img::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, transparent 55%, rgba(15, 23, 42, .65));
    }

    .cat-card-body {
        padding: 28px 26px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }

    .cat-card-icon {
        width: 48px;
        height: 48px;
        border-radius: 14px;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        display: inline-flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 1.2rem;
        margin-bottom: 18px;
        box-shadow: 0 6px 16px rgba(79, 70, 229, .25);
    }

    .cat-card h3 {
        font-size: 1.2rem;
        font-weight: 700;
        margin-bottom: 10px;
    }

    .cat-card p {
        color: var(--text-weak);
        font-size: .92rem;
        line-height: 1.7;
        flex: 1;
    }

    .cat-card-link {
        margin-top: 20px;
        font-weight: 600;
        color: var(--primary);
        font-size: .9rem;
        display: inline-flex;
        align-items: center;
        gap: 6px;
        transition: var(--transition);
    }

    .cat-card-link:hover {
        gap: 12px;
        color: var(--primary-dark);
    }

    /* ===== 流程 ===== */
    .process-section {
        background: #fff;
        border-top: 1px solid var(--border-color);
        border-bottom: 1px solid var(--border-color);
    }

    .process-step {
        text-align: center;
        padding: 24px;
        position: relative;
    }

    .process-step:not(:last-child)::after {
        content: '';
        position: absolute;
        top: 48px;
        right: -22px;
        width: 44px;
        height: 2px;
        background: linear-gradient(90deg, var(--primary), var(--accent));
        border-radius: 2px;
    }

    .process-num {
        width: 72px;
        height: 72px;
        margin: 0 auto 20px;
        border-radius: 22px;
        background: linear-gradient(135deg, rgba(79, 70, 229, .1), rgba(6, 182, 212, .1));
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.6rem;
        font-weight: 800;
        color: var(--primary);
        border: 1px solid rgba(79, 70, 229, .12);
    }

    .process-step h3 {
        font-size: 1.1rem;
        font-weight: 700;
        margin-bottom: 8px;
    }

    .process-step p {
        color: var(--text-weak);
        font-size: .88rem;
        line-height: 1.65;
        max-width: 220px;
        margin: 0 auto;
    }

    /* ===== FAQ 手风琴 ===== */
    .faq-section {
        background: var(--bg-light);
    }

    .faq-wrap {
        max-width: 860px;
        margin: 0 auto;
    }

    .faq-item {
        background: var(--card-bg);
        border-radius: 18px;
        border: 1px solid var(--border-color);
        box-shadow: var(--shadow-sm);
        margin-bottom: 16px;
        overflow: hidden;
        transition: var(--transition);
    }

    .faq-item:hover,
    .faq-item.open {
        border-color: rgba(79, 70, 229, .3);
        box-shadow: var(--shadow-md);
    }

    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        padding: 22px 26px;
        background: none;
        border: none;
        text-align: left;
        font-size: 1rem;
        font-weight: 600;
        color: var(--text-main);
        gap: 20px;
        transition: var(--transition);
    }

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

    .faq-question:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: -2px;
        border-radius: 18px;
    }

    .faq-q-left {
        display: flex;
        align-items: center;
        gap: 14px;
    }

    .faq-q-tag {
        display: inline-block;
        padding: 3px 12px;
        border-radius: 30px;
        font-size: .72rem;
        font-weight: 600;
        background: rgba(6, 182, 212, .1);
        color: var(--accent);
        border: 1px solid rgba(6, 182, 212, .15);
        white-space: nowrap;
    }

    .faq-icon {
        width: 32px;
        height: 32px;
        flex-shrink: 0;
        border-radius: 50%;
        background: #f1f5f9;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: 1.1rem;
        color: var(--text-weak);
        transition: var(--transition);
    }

    .faq-item.open .faq-icon {
        background: var(--primary);
        color: #fff;
        transform: rotate(180deg);
    }

    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height .35s ease;
    }

    .faq-answer-inner {
        padding: 0 26px 24px 26px;
        color: var(--text-weak);
        font-size: .94rem;
        line-height: 1.8;
        border-top: 1px solid var(--border-color);
        margin: 0 26px;
        padding: 20px 0 24px;
    }

    /* ===== 工具矩阵 ===== */
    .tools-section {
        background: var(--bg-dark);
        position: relative;
        overflow: hidden;
    }

    .tools-section::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
        opacity: .08;
    }

    .tools-section .container {
        position: relative;
        z-index: 1;
    }

    .tool-card {
        background: rgba(255, 255, 255, .05);
        border: 1px solid rgba(255, 255, 255, .1);
        border-radius: 20px;
        padding: 28px 24px;
        text-align: center;
        transition: var(--transition);
        height: 100%;
    }

    .tool-card:hover {
        background: rgba(255, 255, 255, .1);
        border-color: rgba(255, 255, 255, .2);
        transform: translateY(-4px);
    }

    .tool-icon {
        width: 56px;
        height: 56px;
        margin: 0 auto 18px;
        border-radius: 16px;
        background: linear-gradient(135deg, rgba(79, 70, 229, .3), rgba(6, 182, 212, .3));
        border: 1px solid rgba(255, 255, 255, .15);
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 1.4rem;
    }

    .tool-card h3 {
        color: #fff;
        font-size: 1.05rem;
        font-weight: 600;
        margin-bottom: 8px;
    }

    .tool-card p {
        color: rgba(255, 255, 255, .6);
        font-size: .85rem;
        line-height: 1.6;
    }

    /* ===== CTA ===== */
    .cta-section {
        position: relative;
        padding: 80px 0;
        background-image: url('/assets/images/backpic/back-2.png');
        background-size: cover;
        background-position: center;
    }

    .cta-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(15, 23, 42, .8), rgba(79, 70, 229, .8));
    }

    .cta-section .container {
        position: relative;
        z-index: 1;
    }

    .cta-box {
        background: rgba(255, 255, 255, .1);
        border: 1px solid rgba(255, 255, 255, .2);
        border-radius: 32px;
        padding: 60px 50px;
        text-align: center;
        backdrop-filter: blur(10px);
        max-width: 900px;
        margin: 0 auto;
    }

    .cta-box h2 {
        color: #fff;
        font-size: 2rem;
        font-weight: 800;
        margin-bottom: 16px;
    }

    .cta-box p {
        color: rgba(255, 255, 255, .8);
        font-size: 1.05rem;
        margin-bottom: 30px;
        max-width: 560px;
        margin-left: auto;
        margin-right: auto;
    }

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

    .btn-primary {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 14px 34px;
        border-radius: 50px;
        background: #fff;
        color: var(--primary);
        font-weight: 700;
        font-size: .95rem;
        transition: var(--transition);
        border: 2px solid transparent;
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 30px rgba(0, 0, 0, .2);
    }

    .btn-ghost {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 14px 34px;
        border-radius: 50px;
        background: transparent;
        color: #fff;
        font-weight: 600;
        font-size: .95rem;
        border: 2px solid rgba(255, 255, 255, .5);
        transition: var(--transition);
    }

    .btn-ghost:hover {
        border-color: #fff;
        background: rgba(255, 255, 255, .1);
    }

    /* ===== 页脚 ===== */
    .site-footer {
        background: #0f172a;
        color: #94a3b8;
        padding: 70px 0 0;
        font-size: .92rem;
    }

    .footer-top {
        display: grid;
        grid-template-columns: 1.6fr 1fr 1fr;
        gap: 50px;
        padding-bottom: 50px;
        border-bottom: 1px solid rgba(255, 255, 255, .08);
    }

    .footer-brand .logo {
        position: static;
        transform: none;
        margin-bottom: 18px;
        color: #fff;
    }

    .footer-brand p {
        color: #94a3b8;
        line-height: 1.8;
        max-width: 340px;
    }

    .footer-col h4 {
        color: #fff;
        font-size: 1rem;
        font-weight: 600;
        margin-bottom: 20px;
    }

    .footer-col ul {
        list-style: none;
    }

    .footer-col li {
        margin-bottom: 12px;
    }

    .footer-col a {
        color: #94a3b8;
        transition: var(--transition);
    }

    .footer-col a:hover {
        color: #fff;
        padding-left: 4px;
    }

    .footer-bottom {
        padding: 24px 0;
        text-align: center;
        color: #64748b;
        font-size: .85rem;
        border-top: 1px solid rgba(255, 255, 255, .06);
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .banner-title {
            font-size: 2.4rem;
        }
        .section-title {
            font-size: 1.8rem;
        }
        .process-step:not(:last-child)::after {
            display: none;
        }
    }

    @media (max-width: 768px) {
        .header-inner {
            height: 64px;
        }

        .logo {
            position: static;
            transform: none;
            font-size: 1.2rem;
        }

        .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            font-size: 1rem;
        }

        .nav-group {
            display: none;
        }

        .mobile-toggle {
            display: inline-flex;
            order: 0;
        }

        .mobile-menu {
            display: block;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--border-color);
            padding: 16px 24px;
            box-shadow: var(--shadow-lg);
            transform: translateY(-120%);
            transition: transform .3s ease;
            z-index: 49;
        }

        .mobile-menu.open {
            transform: translateY(0);
        }

        .mobile-menu .nav-link {
            display: block;
            padding: 14px 16px;
            border-radius: 12px;
            margin-bottom: 4px;
        }

        .mobile-menu .nav-link.active {
            background: var(--primary);
            color: #fff;
        }

        .page-banner {
            padding: 80px 0 70px;
        }

        .banner-title {
            font-size: 1.9rem;
        }

        .banner-subtitle {
            font-size: 1rem;
        }

        .section-padding {
            padding: 60px 0;
        }

        .simplebar,
        .section-title {
            font-size: 1.6rem;
        }

        .stats-card {
            margin-bottom: 16px;
        }

        .footer-top {
            grid-template-columns: 1fr;
            gap: 36px;
        }

        .cta-box {
            padding: 40px 24px;
            border-radius: 22px;
        }

        .cta-box h2 {
            font-size: 1.4rem;
        }
    }

    @media (max-width: 520px) {
        .container {
            padding: 0 18px;
        }

        .banner-title {
            font-size: 1.6rem;
        }

        .banner-search {
            flex-direction: row;
            padding: 6px 6px 6px 16px;
            border-radius: 40px;
        }

        .banner-search button {
            padding: 9px 16px;
            font-size: .85rem;
        }

        .section-title {
            font-size: 1.35rem;
        }

        .section-subtitle {
            font-size: .92rem;
        }

        .faq-question {
            padding: 18px 18px;
            font-size: .92rem;
        }

        .faq-q-tag {
            display: none;
        }

        .faq-answer-inner {
            margin: 0 18px;
        }

        .cta-buttons .btn-primary,
        .cta-buttons .btn-ghost {
            width: 100%;
            justify-content: center;
        }

        .footer-bottom {
            font-size: .78rem;
            padding: 20px 12px;
        }
    }