/* roulang page: index */
:root {
        --primary: #2E90E8;
        --primary-dark: #1A6BBF;
        --primary-light: #E3F1FC;
        --primary-lighter: #F3F9FE;
        --success: #0E9F6E;
        --accent: #F59E0B;
        --text-primary: #1E293B;
        --text-secondary: #64748B;
        --text-muted: #94A3B8;
        --border-color: #E2E8F0;
        --bg-white: #FFFFFF;
        --bg-alt: #F6FAFE;
        --shadow-card: 0 2px 8px rgba(2, 32, 71, 0.05);
        --shadow-card-hover: 0 12px 32px rgba(2, 32, 71, 0.10);
        --shadow-nav: 0 4px 16px rgba(2, 32, 71, 0.04);
        --shadow-cta: 0 8px 20px rgba(46, 144, 232, 0.25);
        --radius-card: 16px;
        --radius-btn: 12px;
        --radius-input: 10px;
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Segoe UI', sans-serif;
        background: var(--bg-white);
        color: var(--text-primary);
        line-height: 1.6;
        font-size: 15px;
        -webkit-font-smoothing: antialiased;
    }

    .container {
        max-width: 1280px;
        margin: 0 auto;
        padding-left: 16px;
        padding-right: 16px;
    }
    @media (min-width:1024px) {
        .container {
            padding-left: 32px;
            padding-right: 32px;
        }
    }

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

    a {
        color: var(--primary);
        text-decoration: none;
        transition: color .2s ease;
    }
    a:hover {
        color: var(--primary-dark);
    }
    a:focus-visible,
    button:focus-visible,
    input:focus-visible {
        outline: 2px solid var(--primary);
        outline-offset: 2px;
    }

    /* Top Bar */
    .top-bar {
        height: 36px;
        background: #111827;
        color: rgba(255, 255, 255, .7);
        font-size: 12px;
    }
    .top-bar a {
        color: rgba(255, 255, 255, .7);
    }
    .top-bar a:hover {
        color: #fff;
    }

    /* Main Nav */
    .main-nav {
        height: 64px;
        background: #fff;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-nav);
        position: sticky;
        top: 0;
        z-index: 50;
    }
    .nav-logo {
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .nav-logo-mark {
        width: 36px;
        height: 36px;
        border-radius: 10px;
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-weight: 700;
        font-size: 15px;
        letter-spacing: .5px;
    }
    .nav-logo-text {
        font-size: 18px;
        font-weight: 700;
        color: var(--text-primary);
        white-space: nowrap;
    }
    .nav-logo-text span {
        font-weight: 400;
        font-size: 14px;
        color: var(--text-secondary);
    }
    .nav-menu {
        display: flex;
        align-items: center;
        gap: 28px;
        height: 100%;
    }
    .nav-menu a {
        font-size: 14px;
        font-weight: 500;
        color: var(--text-secondary);
        padding: 0 4px;
        height: 64px;
        display: inline-flex;
        align-items: center;
        position: relative;
    }
    .nav-menu a:hover {
        color: var(--primary);
    }
    .nav-menu a.active {
        color: var(--primary);
        font-weight: 600;
    }
    .nav-menu a.active::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: 2px;
        background: var(--primary);
        border-radius: 2px 2px 0 0;
    }
    .btn-login {
        height: 40px;
        padding: 0 22px;
        border-radius: var(--radius-btn);
        background: var(--primary);
        color: #fff;
        font-size: 14px;
        font-weight: 600;
        border: none;
        cursor: pointer;
        transition: all .2s ease;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .btn-login:hover {
        background: var(--primary-dark);
        box-shadow: var(--shadow-cta);
        transform: translateY(-2px);
        color: #fff;
    }
    .btn-reg {
        height: 40px;
        padding: 0 22px;
        border-radius: var(--radius-btn);
        background: #fff;
        color: var(--primary);
        font-size: 14px;
        font-weight: 600;
        border: 1px solid var(--primary);
        cursor: pointer;
        transition: all .2s ease;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .btn-reg:hover {
        border-color: var(--primary-dark);
        color: var(--primary-dark);
        background: var(--primary-lighter);
        transform: translateY(-2px);
    }

    .hamburger-btn {
        display: none;
        width: 40px;
        height: 40px;
        border-radius: 10px;
        border: 1px solid var(--border-color);
        background: #fff;
        cursor: pointer;
        align-items: center;
        justify-content: center;
        color: var(--text-primary);
        font-size: 18px;
    }
    .hamburger-btn:hover {
        background: var(--primary-lighter);
    }

    @media (max-width:768px) {
        .nav-menu,
        .nav-actions {
            display: none;
        }
        .hamburger-btn {
            display: inline-flex;
        }
        .mobile-panel {
            position: fixed;
            top: 100px;
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-card-hover);
            z-index: 49;
            padding: 16px 24px 24px;
        }
        .mobile-panel a {
            display: block;
            padding: 12px 0;
            font-size: 15px;
            color: var(--text-primary);
            border-bottom: 1px solid #f1f5f9;
        }
        .mobile-panel a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .mobile-panel .btn-login,
        .mobile-panel .btn-reg {
            width: 100%;
            justify-content: center;
            margin-top: 12px;
        }
    }

    /* Hero */
    .hero-section {
        position: relative;
        background: linear-gradient(135deg, var(--primary-lighter) 0%, #fff 100%);
        border-bottom: 1px solid var(--border-color);
        overflow: hidden;
    }
    .hero-bg {
        position: absolute;
        inset: 0;
        background-image: url('/assets/images/backpic/back-1.png');
        background-size: cover;
        background-position: center;
        opacity: .35;
    }
    .hero-content {
        position: relative;
        z-index: 2;
        display: grid;
        grid-template-columns: 7fr 5fr;
        gap: 48px;
        align-items: center;
        padding-top: 80px;
        padding-bottom: 64px;
    }
    @media (max-width:1024px) {
        .hero-content {
            grid-template-columns: 1fr;
            padding-top: 48px;
        }
    }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: var(--primary-light);
        color: var(--primary-dark);
        font-size: 13px;
        font-weight: 500;
        padding: 6px 16px;
        border-radius: 999px;
        margin-bottom: 20px;
    }
    .hero-title {
        font-size: 36px;
        line-height: 1.2;
        font-weight: 700;
        letter-spacing: -0.02em;
        color: var(--text-primary);
        margin-bottom: 18px;
    }
    @media (min-width:768px) {
        .hero-title {
            font-size: 48px;
        }
    }
    @media (min-width:1280px) {
        .hero-title {
            font-size: 56px;
        }
    }
    .hero-subtitle {
        font-size: 16px;
        line-height: 1.75;
        color: var(--text-secondary);
        max-width: 480px;
        margin-bottom: 32px;
    }
    .hero-btns {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
    }
    .btn-primary-lg {
        height: 48px;
        padding: 0 32px;
        border-radius: var(--radius-btn);
        background: var(--primary);
        color: #fff;
        font-size: 15px;
        font-weight: 600;
        border: none;
        cursor: pointer;
        transition: all .2s ease;
        display: inline-flex;
        align-items: center;
        gap: 8px;
    }
    .btn-primary-lg:hover {
        background: var(--primary-dark);
        box-shadow: var(--shadow-cta);
        transform: translateY(-2px);
        color: #fff;
    }
    .btn-outline-lg {
        height: 48px;
        padding: 0 32px;
        border-radius: var(--radius-btn);
        background: #fff;
        color: var(--primary);
        font-size: 15px;
        font-weight: 600;
        border: 1px solid var(--primary);
        cursor: pointer;
        transition: all .2s ease;
        display: inline-flex;
        align-items: center;
        gap: 8px;
    }
    .btn-outline-lg:hover {
        border-color: var(--primary-dark);
        color: var(--primary-dark);
        background: var(--primary-lighter);
        transform: translateY(-2px);
    }

    .hero-stats {
        display: flex;
        flex-wrap: wrap;
        gap: 24px;
        margin-top: 40px;
    }
    .hero-stat-item {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        font-weight: 500;
        color: var(--text-secondary);
    }
    .hero-stat-item i {
        color: var(--primary);
        font-size: 16px;
    }

    /* Hero Login Card */
    .hero-login-card {
        background: #fff;
        border-radius: 20px;
        box-shadow: 0 20px 48px rgba(2, 32, 71, .12);
        padding: 32px;
        border: 1px solid rgba(226, 232, 240, .6);
        max-width: 420px;
        margin-left: auto;
    }
    @media (max-width:1024px) {
        .hero-login-card {
            margin-left: 0;
            max-width: 480px;
        }
    }
    .login-card-header {
        text-align: center;
        margin-bottom: 24px;
    }
    .login-card-title {
        font-size: 20px;
        font-weight: 700;
        color: var(--text-primary);
    }
    .login-card-sub {
        font-size: 13px;
        color: var(--text-muted);
        margin-top: 4px;
    }
    .form-group {
        margin-bottom: 16px;
    }
    .form-group label {
        display: block;
        font-size: 12px;
        font-weight: 500;
        color: var(--text-secondary);
        margin-bottom: 6px;
    }
    .form-control {
        width: 100%;
        height: 44px;
        border-radius: var(--radius-input);
        border: 1px solid var(--border-color);
        padding: 0 14px;
        font-size: 14px;
        color: var(--text-primary);
        background: var(--bg-white);
        transition: all .2s ease;
    }
    .form-control:focus {
        outline: none;
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(46, 144, 232, .15);
    }
    .login-card-btn {
        width: 100%;
        height: 46px;
        border-radius: var(--radius-input);
        background: var(--primary);
        color: #fff;
        font-size: 15px;
        font-weight: 600;
        border: none;
        cursor: pointer;
        transition: all .2s ease;
        margin-top: 8px;
    }
    .login-card-btn:hover {
        background: var(--primary-dark);
        box-shadow: var(--shadow-cta);
    }
    .login-card-links {
        display: flex;
        justify-content: space-between;
        margin-top: 14px;
        font-size: 13px;
    }
    .login-card-links a {
        color: var(--text-muted);
    }
    .login-card-links a:hover {
        color: var(--primary);
    }

    /* Section Common */
    .section {
        padding: 80px 0;
    }
    @media (max-width:768px) {
        .section {
            padding: 48px 0;
        }
    }
    .section-head {
        text-align: center;
        max-width: 720px;
        margin: 0 auto 48px;
    }
    .section-head .kicker {
        font-size: 13px;
        font-weight: 600;
        color: var(--primary);
        text-transform: uppercase;
        letter-spacing: .08em;
        margin-bottom: 8px;
        display: block;
    }
    .section-head h2 {
        font-size: 28px;
        font-weight: 600;
        line-height: 1.3;
        color: var(--text-primary);
        margin-bottom: 12px;
    }
    @media (min-width:768px) {
        .section-head h2 {
            font-size: 32px;
        }
    }
    .section-head p {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.7;
    }

    /* Timeline */
    .timeline-wrap {
        max-width: 960px;
        margin: 0 auto;
        position: relative;
    }
    .timeline-line {
        position: absolute;
        left: 50%;
        top: 0;
        bottom: 0;
        width: 2px;
        background: var(--primary-light);
        transform: translateX(-50%);
    }
    @media (max-width:768px) {
        .timeline-line {
            left: 24px;
            transform: none;
        }
    }
    .timeline-item {
        position: relative;
        display: flex;
        width: 50%;
        padding: 0 40px 48px;
    }
    .timeline-item:nth-child(odd) {
        left: 0;
        justify-content: flex-end;
        text-align: right;
    }
    .timeline-item:nth-child(even) {
        left: 50%;
        justify-content: flex-start;
        text-align: left;
    }
    @media (max-width:768px) {
        .timeline-item,
        .timeline-item:nth-child(odd),
        .timeline-item:nth-child(even) {
            width: 100%;
            left: 0;
            text-align: left;
            padding-left: 56px;
            padding-right: 0;
            justify-content: flex-start;
        }
    }
    .timeline-dot {
        position: absolute;
        top: 4px;
        width: 12px;
        height: 12px;
        border-radius: 50%;
        background: var(--primary);
        border: 3px solid var(--primary-light);
        box-shadow: 0 0 0 4px rgba(46, 144, 232, .12);
        z-index: 1;
    }
    .timeline-item:nth-child(odd) .timeline-dot {
        right: -6px;
    }
    .timeline-item:nth-child(even) .timeline-dot {
        left: -6px;
    }
    @media (max-width:768px) {
        .timeline-item .timeline-dot,
        .timeline-item:nth-child(odd) .timeline-dot,
        .timeline-item:nth-child(even) .timeline-dot {
            left: 18px;
            right: auto;
        }
    }
    .timeline-card {
        background: var(--bg-white);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 20px 24px;
        max-width: 360px;
        transition: box-shadow .25s ease;
    }
    .timeline-card:hover {
        box-shadow: var(--shadow-card-hover);
    }
    .timeline-time {
        display: inline-block;
        background: var(--primary-light);
        color: var(--primary-dark);
        font-size: 12px;
        font-weight: 600;
        padding: 4px 14px;
        border-radius: 999px;
        margin-bottom: 10px;
    }
    .timeline-card h3 {
        font-size: 18px;
        font-weight: 600;
        color: var(--text-primary);
        margin-bottom: 6px;
    }
    .timeline-card p {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.6;
    }

    /* Feature Cards */
    .feature-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 24px;
    }
    @media (min-width:640px) {
        .feature-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }
    @media (min-width:1024px) {
        .feature-grid {
            grid-template-columns: repeat(4, 1fr);
        }
    }
    .feature-card {
        background: var(--bg-white);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        overflow: hidden;
        transition: all .25s ease;
    }
    .feature-card:hover {
        box-shadow: var(--shadow-card-hover);
        transform: translateY(-4px);
    }
    .feature-card-img {
        aspect-ratio: 4/3;
        overflow: hidden;
    }
    .feature-card-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform .4s ease;
    }
    .feature-card:hover .feature-card-img img {
        transform: scale(1.03);
    }
    .feature-card-body {
        padding: 20px;
    }
    .feature-card-body h3 {
        font-size: 16px;
        font-weight: 600;
        color: var(--text-primary);
        margin-bottom: 6px;
    }
    .feature-card-body p {
        font-size: 13px;
        color: var(--text-secondary);
        line-height: 1.6;
        margin-bottom: 12px;
    }
    .feature-tag {
        display: inline-block;
        background: var(--primary-light);
        color: var(--primary-dark);
        font-size: 12px;
        font-weight: 500;
        padding: 3px 10px;
        border-radius: 999px;
    }

    /* Compare Table */
    .compare-wrap {
        overflow-x: auto;
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        background: #fff;
    }
    .compare-table {
        width: 100%;
        min-width: 700px;
        border-collapse: separate;
        border-spacing: 0;
    }
    .compare-table th {
        padding: 20px 24px;
        text-align: center;
        font-size: 16px;
        font-weight: 600;
        color: var(--text-primary);
        background: var(--primary-lighter);
        border-bottom: 1px solid var(--border-color);
    }
    .compare-table th.recommend-col {
        background: #F8FAFE;
        border-left: 2px solid var(--primary);
        border-right: 2px solid var(--primary);
        position: relative;
    }
    .recommend-badge {
        display: inline-block;
        background: var(--accent);
        color: #fff;
        font-size: 12px;
        font-weight: 600;
        padding: 3px 12px;
        border-radius: 999px;
        margin-bottom: 6px;
    }
    .compare-table td {
        padding: 14px 24px;
        text-align: center;
        font-size: 14px;
        color: var(--text-secondary);
        border-bottom: 1px solid #f1f5f9;
    }
    .compare-table td:first-child {
        text-align: left;
        font-weight: 500;
        color: var(--text-primary);
        background: #F8FAFC;
    }
    .compare-table td.recommend-col {
        background: #F8FAFE;
        border-left: 2px solid var(--primary);
        border-right: 2px solid var(--primary);
    }
    .compare-table tr:last-child td {
        border-bottom: none;
    }
    .compare-table .price-text {
        font-size: 28px;
        font-weight: 700;
        color: var(--primary);
        font-variant-numeric: tabular-nums;
    }
    .compare-table .price-unit {
        font-size: 14px;
        color: var(--text-muted);
        font-weight: 400;
    }
    .compare-btn {
        display: inline-block;
        padding: 8px 28px;
        border-radius: var(--radius-btn);
        font-size: 14px;
        font-weight: 600;
        background: var(--primary);
        color: #fff;
        transition: all .2s ease;
    }
    .compare-btn:hover {
        background: var(--primary-dark);
        box-shadow: var(--shadow-cta);
        color: #fff;
    }
    .compare-btn-outline {
        display: inline-block;
        padding: 8px 28px;
        border-radius: var(--radius-btn);
        font-size: 14px;
        font-weight: 600;
        border: 1px solid var(--border-color);
        color: var(--text-secondary);
        background: #fff;
        transition: all .2s ease;
    }
    .compare-btn-outline:hover {
        border-color: var(--primary);
        color: var(--primary);
    }

    /* FAQ */
    .faq-wrap {
        max-width: 760px;
        margin: 0 auto;
    }
    .faq-item {
        border-bottom: 1px solid var(--border-color);
        padding: 18px 0;
    }
    .faq-item:first-child {
        border-top: 1px solid var(--border-color);
    }
    .faq-question {
        display: flex;
        justify-content: space-between;
        align-items: center;
        cursor: pointer;
        font-size: 15px;
        font-weight: 600;
        color: var(--text-primary);
        padding: 8px 0;
        gap: 12px;
    }
    .faq-q-icon {
        width: 24px;
        height: 24px;
        border-radius: 50%;
        background: var(--primary-light);
        color: var(--primary-dark);
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: 12px;
        font-weight: 700;
        flex-shrink: 0;
    }
    .faq-toggle-icon {
        width: 24px;
        height: 24px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        color: var(--text-muted);
        transition: transform .3s ease;
        flex-shrink: 0;
    }
    .faq-item.active .faq-toggle-icon {
        transform: rotate(45deg);
        color: var(--primary);
    }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height .3s ease;
        padding-left: 32px;
    }
    .faq-answer p {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.7;
        padding-bottom: 8px;
    }

    /* CTA Section */
    .cta-section {
        background: linear-gradient(135deg, var(--primary-lighter) 0%, #fff 60%);
    }
    .cta-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 48px;
        align-items: center;
    }
    @media (max-width:768px) {
        .cta-grid {
            grid-template-columns: 1fr;
        }
    }
    .cta-card {
        background: #fff;
        border-radius: 20px;
        box-shadow: var(--shadow-card-hover);
        padding: 32px;
        max-width: 480px;
    }
    .cta-info-item {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        margin-bottom: 20px;
    }
    .cta-info-icon {
        width: 40px;
        height: 40px;
        border-radius: 10px;
        background: var(--primary-light);
        color: var(--primary-dark);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        flex-shrink: 0;
    }
    .cta-info-item h4 {
        font-size: 15px;
        font-weight: 600;
        color: var(--text-primary);
        margin-bottom: 2px;
    }
    .cta-info-item p {
        font-size: 13px;
        color: var(--text-secondary);
        line-height: 1.6;
    }

    /* News List */
    .news-list {
        max-width: 960px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 16px;
    }
    .news-item {
        display: flex;
        align-items: center;
        gap: 20px;
        background: #fff;
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 16px;
        transition: all .25s ease;
    }
    .news-item:hover {
        box-shadow: var(--shadow-card-hover);
    }
    .news-thumb {
        width: 96px;
        height: 96px;
        border-radius: 12px;
        overflow: hidden;
        flex-shrink: 0;
    }
    .news-thumb img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }
    .news-body {
        flex: 1;
        min-width: 0;
    }
    .news-body h3 {
        font-size: 16px;
        font-weight: 600;
        color: var(--text-primary);
        margin-bottom: 4px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .news-body p {
        font-size: 13px;
        color: var(--text-secondary);
        line-height: 1.6;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 8px;
    }
    .news-meta {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 12px;
        color: var(--text-muted);
    }
    .news-cat {
        background: var(--primary-light);
        color: var(--primary-dark);
        padding: 2px 10px;
        border-radius: 999px;
        font-weight: 500;
    }
    .news-more-link {
        font-size: 13px;
        font-weight: 600;
        color: var(--primary);
        display: inline-flex;
        align-items: center;
        gap: 4px;
        margin-left: auto;
    }
    .news-more-link i {
        transition: transform .2s ease;
    }
    .news-more-link:hover i {
        transform: translateX(2px);
    }
    @media (max-width:640px) {
        .news-item {
            flex-direction: column;
            align-items: flex-start;
        }
        .news-thumb {
            width: 100%;
            height: 140px;
        }
    }
    .news-empty {
        text-align: center;
        padding: 48px;
        background: var(--primary-lighter);
        border-radius: var(--radius-card);
        color: var(--text-secondary);
        font-size: 14px;
    }
    .news-empty i {
        display: block;
        margin-bottom: 12px;
        color: var(--primary);
        font-size: 32px;
    }

    /* Footer */
    .site-footer {
        background: #0F172A;
        color: var(--text-muted);
        padding: 64px 0 0;
        margin-top: 48px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 40px;
        padding-bottom: 48px;
    }
    @media (min-width:640px) {
        .footer-grid {
            grid-template-columns: 1fr 1fr;
        }
    }
    @media (min-width:1024px) {
        .footer-grid {
            grid-template-columns: 2fr 1fr 1fr 1fr;
        }
    }
    .footer-brand h3 {
        color: #fff;
        font-size: 20px;
        font-weight: 700;
        margin-bottom: 12px;
    }
    .footer-brand p {
        font-size: 13px;
        line-height: 1.7;
        max-width: 260px;
    }
    .footer-col h4 {
        color: #fff;
        font-size: 14px;
        font-weight: 600;
        margin-bottom: 16px;
    }
    .footer-col ul {
        list-style: none;
    }
    .footer-col ul li {
        margin-bottom: 10px;
    }
    .footer-col ul a {
        color: var(--text-muted);
        font-size: 14px;
    }
    .footer-col ul a:hover {
        color: #fff;
    }
    .footer-contact li {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 14px;
        margin-bottom: 10px;
        color: var(--text-muted);
    }
    .footer-contact i {
        width: 16px;
        color: var(--primary);
    }
    .footer-qr {
        width: 120px;
        height: 120px;
        background: #1E293B;
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text-muted);
        font-size: 12px;
        border: 1px solid #334155;
        margin-top: 8px;
    }
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, .15);
        padding: 20px 0;
        font-size: 12px;
        color: var(--text-muted);
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 8px;
    }
    .footer-bottom a {
        color: var(--text-muted);
    }
    .footer-bottom a:hover {
        color: #fff;
    }

    /* Utilities */
    .bg-alt {
        background: var(--bg-alt);
    }
    .text-secondary {
        color: var(--text-secondary);
    }
    .text-muted {
        color: var(--text-muted);
    }
    .border-rounded {
        border-radius: var(--radius-card);
    }
    .section-pad {
        padding: 80px 0;
    }
    @media (max-width:768px) {
        .section-pad {
            padding: 48px 0;
        }
    }

    .fade-in {
        animation: fadeIn .8s ease forwards;
    }
    @keyframes fadeIn {
        from {
            opacity: 0;
            transform: translateY(16px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .login-success {
        display: none;
        background: #ECFDF5;
        border: 1px solid #A7F3D0;
        border-radius: var(--radius-input);
        padding: 12px;
        font-size: 13px;
        color: var(--success);
        font-weight: 500;
        margin-top: 16px;
        text-align: center;
    }
    .login-success.show {
        display: block;
    }
    .login-error {
        display: none;
        background: #FEF2F2;
        border: 1px solid #FECACA;
        border-radius: var(--radius-input);
        padding: 12px;
        font-size: 13px;
        color: #DC2626;
        font-weight: 500;
        margin-top: 16px;
        text-align: center;
    }
    .login-error.show {
        display: block;
    }

/* roulang page: category1 */
:root {
            --primary: #2E90E8;
            --primary-dark: #1A6BBF;
            --primary-light: #E3F1FC;
            --primary-lighter: #F3F9FE;
            --success: #0E9F6E;
            --accent: #F59E0B;
            --text-main: #1E293B;
            --text-sub: #64748B;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --bg-white: #FFFFFF;
            --bg-alt: #F6FAFE;
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-input: 10px;
            --shadow-card: 0 2px 8px rgba(2, 32, 71, 0.05);
            --shadow-hover: 0 12px 32px rgba(2, 32, 71, 0.10);
            --shadow-nav: 0 4px 16px rgba(2, 32, 71, 0.04);
            --shadow-cta: 0 8px 20px rgba(46, 144, 232, 0.25);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Segoe UI', sans-serif;
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-main);
            background: var(--bg-white);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }
        button {
            cursor: pointer;
            font-family: inherit;
        }
        input {
            font-family: inherit;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }
        /* ===== Top Bar ===== */
        .topbar {
            height: 36px;
            background: #0F172A;
            display: flex;
            align-items: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.7);
        }
        .topbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .topbar a {
            color: rgba(255, 255, 255, 0.7);
        }
        .topbar a:hover {
            color: #fff;
        }
        .topbar-right {
            display: flex;
            align-items: center;
            gap: 18px;
        }
        /* ===== Nav ===== */
        .main-nav {
            height: 64px;
            background: #fff;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-nav);
            position: sticky;
            top: 0;
            z-index: 50;
        }
        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: 1280px;
            gap: 20px;
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .nav-brand .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, #2E90E8, #5BA8F0);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: #fff;
            font-size: 16px;
            letter-spacing: -0.5px;
            box-shadow: 0 4px 12px rgba(46, 144, 232, 0.25);
        }
        .nav-brand .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .nav-brand .brand-text span {
            font-size: 13px;
            font-weight: 400;
            color: var(--text-sub);
            display: block;
            letter-spacing: 0.02em;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }
        .nav-menu a {
            padding: 6px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-sub);
            border-radius: 8px;
            position: relative;
            transition: color 0.2s, background 0.2s;
        }
        .nav-menu a:hover {
            color: var(--primary);
            background: var(--primary-lighter);
        }
        .nav-menu a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-menu a.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: -2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            transition: all 0.2s ease;
            border: 1px solid transparent;
            line-height: 1.2;
        }
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(46, 144, 232, 0.2);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-cta);
        }
        .btn-outline {
            background: #fff;
            color: var(--text-main);
            border-color: var(--border);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-card);
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 15px;
        }
        .nav-toggle-btn {
            display: none;
            background: none;
            border: none;
            font-size: 20px;
            color: var(--text-main);
            padding: 6px;
            border-radius: 8px;
        }
        .nav-toggle-btn:hover {
            background: var(--primary-lighter);
        }
        /* ===== Mobile Nav ===== */
        .mobile-menu {
            display: none;
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 12px 16px 20px;
            box-shadow: var(--shadow-nav);
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu a {
            display: block;
            padding: 12px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            border-radius: 10px;
        }
        .mobile-menu a:hover {
            background: var(--primary-lighter);
            color: var(--primary);
        }
        .mobile-menu a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .mobile-actions {
            display: flex;
            gap: 10px;
            padding: 14px 16px 4px;
            flex-wrap: wrap;
        }
        .mobile-actions .btn {
            flex: 1;
            min-width: 120px;
        }
        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            background: linear-gradient(135deg, var(--primary-lighter) 0%, #fff 60%);
            border-bottom: 1px solid var(--border);
            overflow: hidden;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') no-repeat center/cover;
            opacity: 0.12;
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            display: grid;
            grid-template-columns: 7fr 5fr;
            gap: 48px;
            align-items: center;
            padding-top: 72px;
            padding-bottom: 72px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 999px;
            margin-bottom: 20px;
        }
        .page-hero h1 {
            font-size: 48px;
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--text-main);
            margin-bottom: 16px;
        }
        .page-hero h1 em {
            font-style: normal;
            color: var(--primary);
        }
        .hero-subtitle {
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-sub);
            margin-bottom: 28px;
            max-width: 520px;
        }
        .hero-cta {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }
        .hero-metrics {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
            border-top: 1px solid var(--border);
            padding-top: 24px;
        }
        .metric-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-sub);
            font-weight: 500;
        }
        .metric-item i {
            font-size: 16px;
            color: var(--primary);
        }
        .hero-image {
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            background: #fff;
            padding: 8px;
        }
        .hero-image img {
            border-radius: 14px;
            width: 100%;
            height: auto;
            aspect-ratio: 4/3;
            object-fit: cover;
        }
        /* ===== Section ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 56px;
        }
        .section-head .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 12px;
        }
        .section-head h2 {
            font-size: 32px;
            font-weight: 600;
            line-height: 1.3;
            letter-spacing: -0.01em;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .section-head p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.7;
        }
        /* ===== Timeline ===== */
        .timeline-wrap {
            position: relative;
            max-width: 960px;
            margin: 0 auto;
            padding: 20px 0;
        }
        .timeline-wrap::before {
            content: "";
            position: absolute;
            top: 0;
            bottom: 0;
            left: 50%;
            width: 2px;
            background: var(--primary-light);
            transform: translateX(-50%);
        }
        .timeline-item {
            position: relative;
            width: 50%;
            padding: 0 40px 48px;
            box-sizing: border-box;
        }
        .timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
        }
        .timeline-item:nth-child(even) {
            left: 50%;
            text-align: left;
        }
        .timeline-item::before {
            content: "";
            position: absolute;
            top: 8px;
            width: 14px;
            height: 14px;
            background: var(--primary);
            border-radius: 50%;
            border: 3px solid #fff;
            box-shadow: 0 0 0 2px var(--primary-light);
            z-index: 1;
        }
        .timeline-item:nth-child(odd)::before {
            right: -7px;
        }
        .timeline-item:nth-child(even)::before {
            left: -7px;
        }
        .timeline-card {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(226, 232, 240, 0.6);
            transition: box-shadow 0.2s, transform 0.2s;
        }
        .timeline-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .timeline-time {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 999px;
            letter-spacing: 0.02em;
            margin-bottom: 12px;
        }
        .timeline-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .timeline-card p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            margin: 0;
        }
        /* ===== Comparison Table ===== */
        .table-scroll {
            overflow-x: auto;
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            background: #fff;
            border: 1px solid var(--border);
        }
        .compare-table {
            width: 100%;
            min-width: 760px;
            border-collapse: collapse;
            font-size: 14px;
        }
        .compare-table th,
        .compare-table td {
            padding: 18px 20px;
            text-align: center;
            border-bottom: 1px solid var(--border);
        }
        .compare-table th {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            background: var(--primary-lighter);
            border-bottom: 2px solid var(--border);
        }
        .compare-table .feature-col {
            text-align: left;
            font-weight: 500;
            color: var(--text-sub);
            background: #F8FAFC;
            min-width: 140px;
        }
        .compare-table tr:last-child td {
            border-bottom: none;
        }
        .compare-table .recommend-col {
            border-left: 2px solid var(--primary);
            border-right: 2px solid var(--primary);
            background: #F8FAFE;
        }
        .compare-table .recommend-col th {
            position: relative;
        }
        .recommend-badge {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 11px;
            font-weight: 700;
            padding: 2px 10px;
            border-radius: 999px;
            margin-left: 6px;
            vertical-align: middle;
            letter-spacing: 0.03em;
        }
        .star-rating {
            color: var(--accent);
            letter-spacing: 2px;
            font-size: 13px;
        }
        /* ===== Prep Cards ===== */
        .prep-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .prep-card {
            background: #fff;
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(226, 232, 240, 0.5);
            transition: box-shadow 0.2s, transform 0.2s;
            position: relative;
            overflow: hidden;
        }
        .prep-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), #5BA8F0);
            opacity: 0;
            transition: opacity 0.2s;
        }
        .prep-card:hover::before {
            opacity: 1;
        }
        .prep-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .prep-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 16px;
        }
        .prep-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .prep-card p {
            font-size: 13px;
            color: var(--text-sub);
            line-height: 1.7;
            margin: 0;
        }
        /* ===== Split Feature ===== */
        .split-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .split-image {
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }
        .split-image img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
        }
        .split-content h2 {
            font-size: 30px;
            font-weight: 600;
            line-height: 1.3;
            margin-bottom: 16px;
        }
        .split-content h2 em {
            font-style: normal;
            color: var(--primary);
        }
        .split-content>p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 28px;
        }
        .security-list {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .security-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--text-main);
            line-height: 1.6;
        }
        .security-list li i {
            color: var(--success);
            font-size: 16px;
            margin-top: 3px;
            flex-shrink: 0;
        }
        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
            padding: 20px 0;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            padding: 4px 0;
            transition: color 0.2s;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-q {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-right: 8px;
            flex-shrink: 0;
        }
        .faq-icon {
            font-size: 16px;
            color: var(--text-muted);
            transition: transform 0.3s;
            flex-shrink: 0;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding-left: 36px;
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-sub);
        }
        .faq-item.active .faq-answer {
            max-height: 200px;
            padding-top: 12px;
        }
        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-lighter) 0%, #fff 100%);
            border-top: 1px solid var(--border);
        }
        .cta-card {
            background: #fff;
            border-radius: 20px;
            box-shadow: var(--shadow-hover);
            max-width: 720px;
            margin: 0 auto;
            padding: 48px 40px;
            text-align: center;
            border: 1px solid rgba(46, 144, 232, 0.15);
        }
        .cta-card h2 {
            font-size: 30px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .cta-card p {
            font-size: 15px;
            color: var(--text-sub);
            margin-bottom: 28px;
        }
        .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }
        /* ===== Footer ===== */
        .site-footer {
            background: #0F172A;
            color: var(--text-muted);
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
        }
        .footer-brand h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand h3 i {
            color: var(--primary);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-muted);
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color 0.2s;
        }
        .footer-col ul a:hover {
            color: #fff;
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
        }
        .footer-contact i {
            color: var(--primary);
            width: 16px;
            text-align: center;
        }
        .footer-qr {
            width: 120px;
            height: 120px;
            background: #1E293B;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .prep-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .page-hero .container {
                grid-template-columns: 1fr;
                gap: 40px;
                padding-top: 56px;
                padding-bottom: 56px;
            }
            .hero-image {
                max-width: 560px;
            }
        }
        @media (max-width: 768px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
            .nav-menu {
                display: none;
            }
            .nav-actions .btn {
                display: none;
            }
            .nav-toggle-btn {
                display: inline-flex;
            }
            .section {
                padding: 56px 0;
            }
            .section-head h2 {
                font-size: 26px;
            }
            .page-hero h1 {
                font-size: 34px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .timeline-wrap::before {
                left: 16px;
                transform: none;
            }
            .timeline-item,
            .timeline-item:nth-child(odd),
            .timeline-item:nth-child(even) {
                width: 100%;
                left: 0;
                text-align: left;
                padding: 0 0 40px 48px;
            }
            .timeline-item::before,
            .timeline-item:nth-child(odd)::before,
            .timeline-item:nth-child(even)::before {
                left: 10px;
                right: auto;
            }
            .split-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .prep-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .cta-card {
                padding: 36px 24px;
            }
            .cta-card h2 {
                font-size: 26px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .topbar-right .topbar-contact {
                display: none;
            }
            .nav-brand .brand-text {
                font-size: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .hero-metrics {
                gap: 16px;
                flex-direction: column;
            }
        }

/* roulang page: article */
:root {
            --primary: #2E90E8;
            --primary-dark: #1A6BBF;
            --primary-light: #E3F1FC;
            --primary-lighter: #F3F9FE;
            --success: #0E9F6E;
            --accent: #F59E0B;
            --text-primary: #1E293B;
            --text-secondary: #64748B;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --bg-alt: #F6FAFE;
            --radius-card: 16px;
            --radius-btn: 12px;
            --radius-input: 10px;
            --shadow-card: 0 2px 8px rgba(2,32,71,0.05);
            --shadow-card-hover: 0 12px 32px rgba(2,32,71,0.10);
            --shadow-nav: 0 4px 16px rgba(2,32,71,0.04);
            --shadow-cta: 0 8px 20px rgba(46,144,232,0.25);
        }

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

        body {
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Segoe UI', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background: #ffffff;
            -webkit-font-smoothing: antialiased;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }

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

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

        input,
        textarea {
            font-family: inherit;
        }

        /* ===== 顶部信息条 ===== */
        .site-header {
            position: relative;
            z-index: 60;
        }

        .top-bar {
            height: 36px;
            background: #0F172A;
            color: rgba(255, 255, 255, 0.7);
            font-size: 12px;
            display: flex;
            align-items: center;
        }

        .top-bar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .top-bar a {
            color: rgba(255, 255, 255, 0.85);
        }

        .top-bar a:hover {
            color: #ffffff;
        }

        .top-bar-right {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .top-bar-service {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .top-bar-service i {
            font-size: 11px;
            color: var(--primary);
        }

        .top-bar-login {
            padding: 2px 10px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .top-bar-login:hover {
            background: rgba(255, 255, 255, 0.16);
            border-color: rgba(255, 255, 255, 0.3);
        }

        /* ===== 主导航 ===== */
        .main-nav {
            height: 64px;
            background: #ffffff;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-nav);
            position: sticky;
            top: 0;
            z-index: 50;
        }

        .nav-inner {
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, #2E90E8, #1A6BBF);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: 0 4px 12px rgba(46, 144, 232, 0.28);
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .brand-text small {
            display: block;
            font-size: 12px;
            font-weight: 400;
            color: var(--text-secondary);
            letter-spacing: 0.02em;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu a {
            display: inline-block;
            padding: 10px 16px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 6px;
            border-bottom: 2px solid transparent;
            transition: color .2s, background-color .2s, border-color .2s;
        }

        .nav-menu a:hover {
            color: var(--primary);
            background-color: var(--primary-lighter);
            border-bottom-color: var(--primary-light);
        }

        .nav-menu a.active {
            color: var(--primary);
            font-weight: 600;
            border-bottom-color: var(--primary);
            background-color: transparent;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            border: 1px solid var(--border);
            background: #fff;
            font-size: 18px;
            color: var(--text-primary);
            align-items: center;
            justify-content: center;
            transition: background-color .2s, border-color .2s;
        }

        .nav-toggle:hover {
            background: var(--primary-lighter);
            border-color: var(--primary-light);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 44px;
            padding: 0 22px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            letter-spacing: 0.01em;
            border: 1px solid transparent;
            transition: transform .2s ease, box-shadow .2s ease, background-color .2s ease, border-color .2s ease, color .2s ease;
        }

        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-cta);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(46, 144, 232, 0.32);
        }

        .btn-outline {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary-lighter);
            border-color: var(--primary-dark);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(46, 144, 232, 0.12);
        }

        .btn-sm {
            height: 36px;
            padding: 0 14px;
            font-size: 14px;
            border-radius: 10px;
        }

        .btn-dark {
            background: #0F172A;
            color: #fff;
        }

        .btn-dark:hover {
            background: #1E293B;
            transform: translateY(-2px);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-bar {
            background: var(--bg-alt);
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb-nav a {
            color: var(--text-secondary);
        }

        .breadcrumb-nav a:hover {
            color: var(--primary);
        }

        .breadcrumb-sep {
            color: #CBD5E1;
            font-size: 12px;
        }

        .breadcrumb-current {
            color: var(--text-secondary);
            font-weight: 500;
            max-width: 240px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            display: inline-block;
            vertical-align: bottom;
        }

        /* ===== 文章主体 ===== */
        .article-section {
            padding: 48px 0 64px;
            background: #ffffff;
        }

        .article-layout {
            display: flex;
            gap: 40px;
            align-items: flex-start;
        }

        .article-main {
            flex: 1;
            min-width: 0;
            max-width: 820px;
        }

        /* 文章头部 */
        .article-header {
            margin-bottom: 32px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border);
        }

        .article-header-top {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
            flex-wrap: wrap;
        }

        .article-category {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 999px;
        }

        .article-category i {
            font-size: 12px;
        }

        .article-header h1 {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin: 0 0 16px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            color: var(--text-muted);
            font-size: 13px;
            flex-wrap: wrap;
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: var(--primary);
        }

        /* 正文排版 */
        .article-content {
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-primary);
        }

        .article-content p {
            margin-bottom: 1.5em;
        }

        .article-content h2 {
            font-size: 24px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 2em 0 0.8em;
            letter-spacing: -0.01em;
        }

        .article-content h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 1.6em 0 0.6em;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 1.5em 1.4em;
        }

        .article-content li {
            margin-bottom: 0.5em;
        }

        .article-content img {
            border-radius: 16px;
            margin: 2em 0;
            box-shadow: var(--shadow-card);
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-lighter);
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            color: var(--text-secondary);
            font-size: 15px;
            margin: 1.5em 0;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5em 0;
            font-size: 14px;
        }

        .article-content th,
        .article-content td {
            padding: 10px 14px;
            border: 1px solid var(--border);
            text-align: left;
        }

        .article-content th {
            background: var(--bg-alt);
            font-weight: 600;
        }

        .article-content a {
            color: var(--primary);
            border-bottom: 1px solid var(--primary-light);
        }

        .article-content a:hover {
            color: var(--primary-dark);
            border-color: var(--primary);
        }

        /* 标签 */
        .article-tags {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid var(--border);
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 13px;
            font-weight: 500;
            padding: 5px 12px;
            border-radius: 999px;
        }

        .tag:hover {
            background: var(--primary);
            color: #fff;
            transition: background-color .2s;
        }

        /* 上一篇 / 下一篇 */
        .article-pagination {
            display: flex;
            gap: 16px;
            margin-top: 32px;
        }

        .page-link {
            flex: 1;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 16px 20px;
            background: var(--bg-alt);
            display: flex;
            flex-direction: column;
            gap: 4px;
            transition: border-color .2s, box-shadow .2s, background-color .2s;
        }

        .page-link:hover {
            border-color: var(--primary);
            background: var(--primary-lighter);
            box-shadow: var(--shadow-card);
        }

        .page-label {
            font-size: 12px;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .page-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-top: 4px;
        }

        .page-link.next {
            text-align: right;
        }

        .page-link.next .page-label {
            justify-content: flex-end;
        }

        /* ===== 侧栏 ===== */
        .article-sidebar {
            width: 280px;
            flex-shrink: 0;
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 88px;
        }

        .sidebar-card {
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 20px;
        }

        .sidebar-card h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: center;
            gap: 8px;
        }

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

        .sidebar-menu {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-menu a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 10px;
            border-radius: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            transition: background-color .2s, color .2s;
        }

        .sidebar-menu a:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        .sidebar-menu i {
            width: 20px;
            text-align: center;
            color: var(--primary);
            font-size: 13px;
        }

        .sidebar-posts {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .sidebar-posts a {
            display: block;
            font-size: 14px;
            line-height: 1.5;
            color: var(--text-secondary);
            padding: 8px 10px;
            border-radius: 8px;
            background: #fff;
            border: 1px solid var(--border);
            transition: border-color .2s, color .2s, box-shadow .2s;
        }

        .sidebar-posts a:hover {
            color: var(--primary);
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 64px 0;
            background: var(--bg-alt);
        }

        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 600;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .section-header p {
            font-size: 15px;
            color: var(--text-secondary);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: #fff;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform .2s ease, box-shadow .2s ease;
        }

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

        .related-card img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .related-card:hover img {
            transform: scale(1.03);
        }

        .related-body {
            padding: 20px;
        }

        .related-body .related-cat {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            margin-bottom: 10px;
        }

        .related-body h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .related-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .read-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            margin-top: 12px;
            transition: gap .2s ease;
        }

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

        /* ===== FAQ ===== */
        .faq-section {
            padding: 64px 0;
            background: #ffffff;
        }

        .faq-inner {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-inner h2 {
            text-align: center;
            font-size: 32px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 40px;
            letter-spacing: -0.02em;
        }

        .faq-list {
            border-top: 1px solid var(--border);
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 4px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            background: none;
            transition: color .2s;
            text-align: left;
        }

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

        .faq-question i {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform .3s ease, color .2s;
            flex-shrink: 0;
        }

        .faq-item.active .faq-question i {
            transform: rotate(45deg);
            color: var(--primary);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .3s ease, padding .3s ease;
            padding: 0 4px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding: 0 4px 18px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 64px 0;
            background: linear-gradient(135deg, #F3F9FE 0%, #ffffff 100%);
        }

        .cta-card {
            background: linear-gradient(135deg, #2E90E8, #1A6BBF);
            border-radius: 20px;
            padding: 48px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-cta);
            color: #fff;
        }

        .cta-card h2 {
            font-size: 26px;
            font-weight: 600;
            letter-spacing: -0.01em;
            margin-bottom: 8px;
        }

        .cta-card p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
        }

        .cta-actions {
            display: flex;
            gap: 12px;
            flex-shrink: 0;
        }

        .btn-white {
            background: #fff;
            color: var(--primary-dark);
        }

        .btn-white:hover {
            background: #F1F5F9;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
        }

        .btn-outline-white {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.7);
        }

        .btn-outline-white:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 空状态 ===== */
        .not-found {
            text-align: center;
            padding: 80px 24px;
            background: var(--bg-alt);
            border-radius: 20px;
            border: 1px solid var(--border);
        }

        .not-found-icon {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
        }

        .not-found h1 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .not-found p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding: 64px 0 0;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .footer-brand h3 {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #94A3B8;
            max-width: 300px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 16px;
        }

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

        .footer-col a {
            color: #94A3B8;
            transition: color .2s;
        }

        .footer-col a:hover {
            color: #fff;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #94A3B8;
        }

        .footer-contact i {
            color: var(--primary);
            width: 16px;
            text-align: center;
        }

        .footer-qr {
            width: 120px;
            height: 120px;
            background: #1E293B;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 12px;
            color: #64748B;
        }

        .footer-bottom a {
            color: #94A3B8;
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .article-layout {
                flex-direction: column-reverse;
            }

            .article-sidebar {
                width: 100%;
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .article-main {
                max-width: 100%;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }

            .top-bar-service {
                display: none;
            }

            .top-bar-right {
                gap: 10px;
            }

            .nav-menu {
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-nav);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 8px 16px 16px;
                display: none;
            }

            .nav-menu.open {
                display: flex;
            }

            .nav-menu a {
                padding: 12px 10px;
                border-radius: 8px;
                border-bottom: none;
                border-left: 3px solid transparent;
            }

            .nav-menu a.active,
            .nav-menu a:hover {
                border-left-color: var(--primary);
                border-bottom-color: transparent;
                background: var(--primary-lighter);
            }

            .nav-toggle {
                display: inline-flex;
            }

            .btn-nav {
                display: none;
            }

            .article-section {
                padding: 32px 0;
            }

            .article-header h1 {
                font-size: 28px;
            }

            .article-pagination {
                flex-direction: column;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .cta-card {
                flex-direction: column;
                text-align: center;
                padding: 32px 24px;
            }

            .cta-actions {
                flex-direction: column;
                width: 100%;
            }

            .cta-actions .btn {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 520px) {
            .brand-text {
                font-size: 18px;
            }

            .top-bar-domain {
                display: none;
            }

            .top-bar-right {
                justify-content: flex-end;
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

            .section-header h2,
            .faq-inner h2 {
                font-size: 26px;
            }

            .not-found {
                padding: 48px 16px;
            }
        }

/* roulang page: category2 */
:root {
    --primary: #2E90E8;
    --primary-dark: #1A6BBF;
    --primary-light: #E3F1FC;
    --primary-lighter: #F3F9FE;
    --success: #0E9F6E;
    --accent: #F59E0B;
    --text: #1E293B;
    --text-muted: #64748B;
    --text-weak: #94A3B8;
    --border: #E2E8F0;
    --bg: #FFFFFF;
    --bg-alt: #F6FAFE;
    --radius-card: 16px;
    --radius-btn: 12px;
    --radius-input: 10px;
    --shadow-card: 0 2px 8px rgba(2, 32, 71, 0.05);
    --shadow-card-hover: 0 12px 32px rgba(2, 32, 71, 0.10);
    --shadow-nav: 0 4px 16px rgba(2, 32, 71, 0.04);
    --shadow-cta: 0 8px 20px rgba(46, 144, 232, 0.25);
    --font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: var(--font-family);
    color: var(--text);
    background: var(--bg);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }

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

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

  button,
  input {
    font-family: inherit;
  }

  .container {
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 32px;
    padding-right: 32px;
  }

  /* 顶部信息条 */
  .topbar {
    height: 36px;
    background: #0F172A;
    color: rgba(255, 255, 255, 0.7);
    font-size: 12px;
  }

  .topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
  }

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

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

  .topbar-right {
    display: flex;
    align-items: center;
    gap: 18px;
  }

  /* 主导航 */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-nav);
  }

  .nav-inner {
    display: flex;
    align-items: center;
    gap: 24px;
    height: 64px;
  }

  .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }

  .brand-logo {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--primary), #6AB8F0);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 800;
    font-size: 14px;
    letter-spacing: 0.02em;
  }

  .brand-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    white-space: nowrap;
  }

  .nav-menu {
    display: flex;
    gap: 28px;
    margin: 0 auto;
  }

  .nav-menu a {
    position: relative;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    padding: 20px 0;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s;
    white-space: nowrap;
  }

  .nav-menu a:hover {
    color: var(--primary);
    border-bottom-color: var(--primary-light);
  }

  .nav-menu a.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
  }

  .nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
  }

  .nav-menu-actions {
    display: none;
  }

  .menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text);
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s;
  }

  .menu-toggle:hover {
    border-color: var(--primary);
    color: var(--primary);
  }

  /* 按钮 */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 40px;
    padding: 0 20px;
    border-radius: var(--radius-btn);
    font-size: 15px;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
  }

  .btn-sm {
    height: 38px;
    padding: 0 16px;
    font-size: 14px;
  }

  .btn-lg {
    height: 50px;
    padding: 0 30px;
    font-size: 16px;
  }

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

  .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-cta);
  }

  .btn-outline {
    background: #fff;
    color: var(--text);
    border-color: var(--border);
  }

  .btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
  }

  .btn-block {
    width: 100%;
  }

  .btn:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
  }

  /* Hero */
  .hero {
    position: relative;
    background: url('/assets/images/backpic/back-1.png') center / cover no-repeat;
    padding: 88px 0 72px;
  }

  .hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.86) 48%, rgba(243, 249, 254, 0.78) 100%);
  }

  .hero-inner {
    position: relative;
    display: grid;
    grid-template-columns: 7fr 5fr;
    gap: 48px;
    align-items: center;
  }

  .hero-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
  }

  .hero-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--primary-dark);
    background: var(--primary-light);
    border-radius: 999px;
    padding: 5px 14px;
  }

  .hero h1 {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--text);
  }

  .hero h1 .dot {
    color: var(--primary);
  }

  .hero-sub {
    margin-top: 18px;
    font-size: 17px;
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 480px;
  }

  .hero-actions {
    display: flex;
    gap: 12px;
    margin-top: 30px;
    flex-wrap: wrap;
  }

  .hero-card {
    background: #fff;
    border-radius: 20px;
    box-shadow: var(--shadow-card-hover);
    padding: 28px;
    max-width: 420px;
    margin-left: auto;
  }

  .hero-card-head {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 16px;
    margin-bottom: 14px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
  }

  .hero-card-head i {
    color: var(--primary);
    font-size: 20px;
  }

  .status-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 13px 0;
    border-bottom: 1px solid var(--border);
  }

  .status-item:last-child {
    border-bottom: none;
  }

  .status-item .status-icon {
    font-size: 20px;
    width: 26px;
    text-align: center;
    color: var(--primary);
    flex-shrink: 0;
  }

  .status-item .status-icon.success {
    color: var(--success);
  }

  .status-item strong {
    display: block;
    font-size: 14px;
    font-weight: 600;
  }

  .status-item span {
    font-size: 12px;
    color: var(--text-weak);
  }

  .hero-card-foot {
    margin-top: 18px;
    display: flex;
    gap: 12px;
  }

  /* 通用板块 */
  .section {
    padding: 80px 0;
  }

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

  .section-gradient {
    background: linear-gradient(135deg, var(--primary-lighter), #fff 60%);
  }

  .section-head {
    max-width: 720px;
    margin-bottom: 48px;
  }

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

  .section-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    padding: 4px 12px;
    border-radius: 999px;
    margin-bottom: 14px;
    letter-spacing: 0.02em;
  }

  .section-title {
    font-size: 32px;
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.02em;
    color: var(--text);
  }

  .section-sub {
    margin-top: 12px;
    color: var(--text-muted);
    font-size: 16px;
    line-height: 1.7;
  }

  /* 介绍区 */
  .intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
  }

  .intro-image {
    position: relative;
  }

  .intro-image img {
    border-radius: 20px;
    box-shadow: var(--shadow-card-hover);
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
  }

  .intro-badge {
    position: absolute;
    left: 18px;
    bottom: 18px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 14px;
    padding: 12px 18px;
    box-shadow: var(--shadow-card);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text);
  }

  .intro-badge i {
    color: var(--primary);
    font-size: 18px;
  }

  .check-list {
    list-style: none;
    margin-top: 18px;
  }

  .check-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 8px 0;
    font-size: 15px;
    color: var(--text);
  }

  .check-list i {
    color: var(--success);
    margin-top: 5px;
    font-size: 14px;
  }

  /* 功能卡片 */
  .feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .card {
    background: #fff;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    transition: box-shadow 0.3s, transform 0.3s;
  }

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

  .feature-card {
    padding: 28px;
  }

  .feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--primary-lighter);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 18px;
  }

  .feature-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 10px;
  }

  .feature-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
  }

  /* 手风琴 */
  .accordion {
    max-width: 860px;
    margin: 0 auto;
  }

  .acc-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    background: #fff;
    margin-bottom: 16px;
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: box-shadow 0.3s;
  }

  .acc-item.open {
    box-shadow: var(--shadow-card-hover);
  }

  .acc-head {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 22px 24px;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    font-size: 17px;
    font-weight: 600;
    color: var(--text);
    transition: color 0.2s;
  }

  .acc-head:hover {
    color: var(--primary);
  }

  .acc-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--primary-light);
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 16px;
  }

  .acc-arrow {
    margin-left: auto;
    transition: transform 0.3s;
    color: var(--text-weak);
    font-size: 16px;
  }

  .acc-item.open .acc-arrow {
    transform: rotate(45deg);
  }

  .acc-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }

  .acc-content {
    padding: 0 24px 24px 76px;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
  }

  .acc-content ul {
    margin-top: 10px;
    padding-left: 18px;
  }

  .acc-content li {
    margin-top: 6px;
  }

  /* 场景卡片 */
  .scenario-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .scenario-card {
    background: #fff;
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: box-shadow 0.3s, transform 0.3s;
  }

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

  .scenario-card img {
    aspect-ratio: 4 / 3;
    object-fit: cover;
    width: 100%;
    transition: transform 0.4s;
  }

  .scenario-card:hover img {
    transform: scale(1.03);
  }

  .scenario-body {
    padding: 20px;
  }

  .scenario-body h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
  }

  .scenario-body p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.7;
  }

  .scenario-tag {
    display: inline-block;
    margin-top: 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    border-radius: 999px;
    padding: 3px 10px;
  }

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

  .process-item {
    position: relative;
    background: #fff;
    border-radius: var(--radius-card);
    padding: 28px 24px;
    box-shadow: var(--shadow-card);
    transition: box-shadow 0.3s, transform 0.3s;
  }

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

  .step-num {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    margin-bottom: 16px;
  }

  .step-icon {
    position: absolute;
    top: 28px;
    right: 24px;
    font-size: 22px;
    color: var(--primary-light);
  }

  .process-item h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 8px;
  }

  .process-item p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.7;
  }

  /* FAQ */
  .faq-list {
    max-width: 760px;
    margin: 0 auto;
  }

  .faq-item {
    border-bottom: 1px solid var(--border);
  }

  .faq-item:first-child {
    border-top: 1px solid var(--border);
  }

  .faq-q {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 0;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    text-align: left;
    background: none;
    border: none;
    color: var(--text);
    transition: color 0.2s;
  }

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

  .faq-q-icon {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }

  .faq-arrow {
    margin-left: auto;
    transition: transform 0.3s;
    color: var(--text-weak);
    font-size: 14px;
  }

  .faq-item.open .faq-arrow {
    transform: rotate(45deg);
  }

  .faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .faq-a-inner {
    padding: 0 0 20px 38px;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.75;
  }

  /* CTA */
  .cta-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: stretch;
    max-width: 920px;
    margin: 0 auto;
  }

  .cta-card {
    background: #fff;
    border-radius: 20px;
    box-shadow: var(--shadow-card-hover);
    padding: 32px;
  }

  .cta-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 22px;
    display: flex;
    align-items: center;
    gap: 10px;
  }

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

  .form-field {
    margin-bottom: 16px;
  }

  .form-field label {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 6px;
    font-weight: 500;
  }

  .form-input {
    width: 100%;
    height: 44px;
    border: 1px solid var(--border);
    border-radius: var(--radius-input);
    padding: 0 14px;
    font-size: 14px;
    color: var(--text);
    background: #fff;
    transition: border-color 0.2s, box-shadow 0.2s;
  }

  .form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(46, 144, 232, 0.15);
  }

  .form-links {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 14px;
    font-size: 13px;
  }

  .form-links a {
    color: var(--primary);
    font-weight: 500;
  }

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

  .login-msg {
    display: none;
    align-items: center;
    gap: 10px;
    margin-top: 16px;
    padding: 12px 14px;
    background: #ECFDF5;
    color: var(--success);
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
  }

  .cta-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 18px;
    padding: 12px 0;
  }

  .cta-info-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    background: #fff;
    border-radius: 16px;
    padding: 18px 20px;
    box-shadow: var(--shadow-card);
  }

  .cta-info-item i {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
  }

  .cta-info-item strong {
    display: block;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
  }

  .cta-info-item span {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
  }

  /* 页脚 */
  .site-footer {
    background: #0F172A;
    color: #94A3B8;
    padding: 56px 0 0;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 32px;
    padding-bottom: 40px;
  }

  .footer-brand h3 {
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    display: flex;
    align-items: center;
  }

  .footer-brand p {
    font-size: 14px;
    margin-top: 14px;
    line-height: 1.75;
    color: #94A3B8;
  }

  .footer-col h4 {
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
  }

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

  .footer-col li {
    margin-bottom: 10px;
    font-size: 14px;
  }

  .footer-col a {
    transition: color 0.2s;
  }

  .footer-col a:hover {
    color: #fff;
  }

  .footer-contact li {
    display: flex;
    align-items: center;
    gap: 8px;
  }

  .footer-qr {
    width: 120px;
    height: 120px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 10px;
  }

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 12px;
    color: #64748B;
  }

  .footer-bottom a {
    color: #94A3B8;
    transition: color 0.2s;
  }

  .footer-bottom a:hover {
    color: #fff;
  }

  /* 响应式 */
  @media (max-width: 1024px) {
    .hero-inner {
      grid-template-columns: 1fr;
    }

    .hero-card {
      margin-left: 0;
      max-width: 100%;
    }

    .intro-grid {
      gap: 32px;
    }

    .feature-grid {
      grid-template-columns: repeat(2, 1fr);
    }

    .scenario-grid {
      grid-template-columns: repeat(2, 1fr);
    }

    .process-grid {
      grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
      grid-template-columns: 1fr 1fr;
    }
  }

  @media (max-width: 768px) {
    .container {
      padding-left: 24px;
      padding-right: 24px;
    }

    .nav-menu {
      display: none;
      flex-direction: column;
      position: absolute;
      top: 64px;
      left: 0;
      right: 0;
      background: #fff;
      border-bottom: 1px solid var(--border);
      padding: 8px 24px 16px;
      gap: 0;
      box-shadow: var(--shadow-nav);
      margin: 0;
    }

    .nav-menu.show {
      display: flex;
    }

    .nav-menu a {
      padding: 14px 0;
      border-bottom: 1px solid var(--border);
      font-size: 15px;
      border-bottom-color: var(--border);
    }

    .nav-menu a.active {
      border-bottom-color: var(--primary);
    }

    .nav-menu-actions {
      display: flex;
      flex-direction: column;
      gap: 12px;
      padding: 16px 0 8px;
    }

    .nav-menu-actions .btn {
      width: 100%;
    }

    .nav-actions {
      display: none;
    }

    .menu-toggle {
      display: flex;
      margin-left: auto;
    }

    .hero {
      padding: 56px 0 48px;
    }

    .hero h1 {
      font-size: 38px;
    }

    .section {
      padding: 56px 0;
    }

    .section-title {
      font-size: 28px;
    }

    .intro-grid,
    .cta-grid {
      grid-template-columns: 1fr;
    }

    .acc-content {
      padding-left: 24px;
    }

    .footer-bottom {
      flex-direction: column;
      text-align: center;
    }
  }

  @media (max-width: 520px) {
    .container {
      padding-left: 16px;
      padding-right: 16px;
    }

    .brand-name {
      font-size: 16px;
    }

    .hero h1 {
      font-size: 30px;
    }

    .hero-sub {
      font-size: 15px;
    }

    .section-title {
      font-size: 24px;
    }

    .feature-grid,
    .scenario-grid,
    .process-grid {
      grid-template-columns: 1fr;
    }

    .hero-card {
      padding: 22px;
    }

    .cta-card {
      padding: 24px;
    }

    .footer-grid {
      grid-template-columns: 1fr;
    }
  }