/* roulang page: index */
:root {
        --primary: #0F766E;
        --primary-dark: #0B5E56;
        --primary-light: #14A398;
        --accent: #F59E0B;
        --accent-light: #FBBF24;
        --bg: #F8FAFC;
        --bg-card: #FFFFFF;
        --text: #1E293B;
        --text-light: #475569;
        --text-muted: #94A3B8;
        --border: #E2E8F0;
        --radius-card: 12px;
        --radius-btn: 8px;
        --shadow-sm: 0 4px 6px -1px rgba(0,0,0,0.06), 0 2px 4px -1px rgba(0,0,0,0.03);
        --shadow-md: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
        --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.10), 0 10px 10px -5px rgba(0,0,0,0.04);
        --transition: all 0.2s ease;
        --font-title: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        --font-body: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
        font-family: var(--font-body);
        font-size: 16px;
        line-height: 1.75;
        color: var(--text);
        background: var(--bg);
        -webkit-font-smoothing: antialiased;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--primary-dark); }
    .container { max-width: 1320px; padding-left: 24px; padding-right: 24px; }
    section { padding: 5rem 0; }
    .section-title {
        font-family: var(--font-title);
        font-size: 2rem;
        font-weight: 700;
        color: var(--text);
        margin-bottom: 0.75rem;
        letter-spacing: -0.02em;
    }
    .section-subtitle {
        font-size: 1.05rem;
        color: var(--text-light);
        max-width: 680px;
        margin-bottom: 2.5rem;
        line-height: 1.6;
    }
    .section-header { margin-bottom: 3rem; }

    /* Header & Nav */
    .site-header {
        background: rgba(255,255,255,0.92);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--border);
        position: sticky;
        top: 0;
        z-index: 1040;
        transition: var(--transition);
    }
    .site-header .navbar {
        padding: 0.6rem 0;
    }
    .site-header .navbar-brand {
        font-family: var(--font-title);
        font-size: 1.4rem;
        font-weight: 700;
        color: var(--text);
        letter-spacing: -0.02em;
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }
    .site-header .navbar-brand .brand-icon {
        width: 32px;
        height: 32px;
        background: var(--primary);
        border-radius: 8px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 1.1rem;
    }
    .site-header .navbar-brand:hover { color: var(--primary); }
    .site-header .nav-link {
        font-size: 0.95rem;
        font-weight: 500;
        color: var(--text-light);
        padding: 0.5rem 1rem !important;
        border-radius: 6px;
        transition: var(--transition);
        position: relative;
    }
    .site-header .nav-link:hover,
    .site-header .nav-link.active {
        color: var(--primary);
        background: rgba(15,118,110,0.06);
    }
    .site-header .nav-link.active::after {
        content: '';
        position: absolute;
        bottom: 2px;
        left: 1rem;
        right: 1rem;
        height: 2px;
        background: var(--primary);
        border-radius: 1px;
    }
    .search-trigger {
        display: flex;
        align-items: center;
        gap: 0.4rem;
        padding: 0.4rem 0.8rem;
        border: 1px solid var(--border);
        border-radius: 8px;
        background: var(--bg);
        color: var(--text-muted);
        font-size: 0.85rem;
        cursor: pointer;
        transition: var(--transition);
    }
    .search-trigger:hover {
        border-color: var(--primary);
        color: var(--primary);
        background: #fff;
    }
    .search-trigger kbd {
        background: var(--border);
        border-radius: 4px;
        padding: 0.1rem 0.4rem;
        font-size: 0.75rem;
        color: var(--text-muted);
    }
    .btn-primary-custom {
        background: var(--primary);
        border: 1px solid var(--primary);
        color: #fff;
        border-radius: var(--radius-btn);
        padding: 0.5rem 1.4rem;
        font-weight: 600;
        font-size: 0.95rem;
        transition: var(--transition);
    }
    .btn-primary-custom:hover {
        background: var(--primary-dark);
        border-color: var(--primary-dark);
        color: #fff;
        box-shadow: 0 4px 12px rgba(15,118,110,0.3);
        transform: translateY(-1px);
    }
    .btn-outline-custom {
        background: transparent;
        border: 1.5px solid var(--primary);
        color: var(--primary);
        border-radius: var(--radius-btn);
        padding: 0.5rem 1.4rem;
        font-weight: 600;
        font-size: 0.95rem;
        transition: var(--transition);
    }
    .btn-outline-custom:hover {
        background: var(--primary);
        color: #fff;
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(15,118,110,0.2);
    }
    .btn-accent {
        background: var(--accent);
        border: 1px solid var(--accent);
        color: #fff;
        border-radius: var(--radius-btn);
        padding: 0.5rem 1.4rem;
        font-weight: 600;
        font-size: 0.95rem;
        transition: var(--transition);
    }
    .btn-accent:hover {
        background: var(--accent-light);
        border-color: var(--accent-light);
        color: #fff;
        transform: translateY(-1px);
        box-shadow: 0 4px 12px rgba(245,158,11,0.3);
    }
    .navbar-toggler {
        border: none;
        padding: 0.4rem 0.6rem;
        color: var(--text);
        font-size: 1.3rem;
    }
    .navbar-toggler:focus { box-shadow: none; }

    /* Hero */
    .hero {
        position: relative;
        padding: 6rem 0 5rem;
        background: linear-gradient(135deg, #0F766E 0%, #0B5E56 60%, #0A4D46 100%);
        overflow: hidden;
        min-height: 75vh;
        display: flex;
        align-items: center;
    }
    .hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
        opacity: 0.18;
        mix-blend-mode: overlay;
    }
    .hero::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: 120px;
        background: linear-gradient(to top, var(--bg), transparent);
    }
    .hero-content { position: relative; z-index: 2; }
    .hero h1 {
        font-family: var(--font-title);
        font-size: 2.8rem;
        font-weight: 700;
        color: #fff;
        line-height: 1.2;
        letter-spacing: -0.02em;
        margin-bottom: 1.2rem;
    }
    .hero h1 span { color: var(--accent); }
    .hero p {
        font-size: 1.15rem;
        color: rgba(255,255,255,0.85);
        max-width: 600px;
        margin-bottom: 2rem;
        line-height: 1.7;
    }
    .hero .btn-group-hero { display: flex; gap: 1rem; flex-wrap: wrap; }
    .hero .btn-primary-custom {
        background: #fff;
        color: var(--primary);
        border: none;
        padding: 0.7rem 2rem;
        font-size: 1.05rem;
    }
    .hero .btn-primary-custom:hover {
        background: var(--accent);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(0,0,0,0.2);
    }
    .hero .btn-outline-custom {
        border-color: rgba(255,255,255,0.6);
        color: #fff;
        padding: 0.7rem 2rem;
        font-size: 1.05rem;
    }
    .hero .btn-outline-custom:hover {
        border-color: #fff;
        background: rgba(255,255,255,0.12);
        color: #fff;
    }
    .hero-stats {
        display: flex;
        gap: 2.5rem;
        margin-top: 2.5rem;
        flex-wrap: wrap;
    }
    .hero-stats .stat-item { text-align: left; }
    .hero-stats .stat-number {
        font-family: var(--font-title);
        font-size: 1.8rem;
        font-weight: 700;
        color: #fff;
        line-height: 1.2;
    }
    .hero-stats .stat-label {
        font-size: 0.9rem;
        color: rgba(255,255,255,0.7);
    }

    /* Category Cards (合集目录) */
    .category-grid .cat-card {
        background: var(--bg-card);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-sm);
        overflow: hidden;
        transition: var(--transition);
        position: relative;
        height: 100%;
        border: 1px solid var(--border);
    }
    .category-grid .cat-card:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-4px);
    }
    .category-grid .cat-card .cat-img {
        height: 200px;
        background-size: cover;
        background-position: center;
        position: relative;
        display: flex;
        align-items: flex-end;
        justify-content: flex-start;
        padding: 1.2rem;
    }
    .category-grid .cat-card .cat-img::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(to top, rgba(0,0,0,0.5), transparent);
    }
    .category-grid .cat-card .cat-img .cat-icon {
        position: relative;
        z-index: 2;
        font-size: 2rem;
        color: #fff;
        background: rgba(255,255,255,0.18);
        width: 48px;
        height: 48px;
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        backdrop-filter: blur(4px);
    }
    .category-grid .cat-card .cat-body {
        padding: 1.2rem 1.5rem 1.5rem;
    }
    .category-grid .cat-card .cat-body h3 {
        font-family: var(--font-title);
        font-size: 1.15rem;
        font-weight: 600;
        margin-bottom: 0.4rem;
        color: var(--text);
    }
    .category-grid .cat-card .cat-body p {
        font-size: 0.9rem;
        color: var(--text-light);
        margin-bottom: 0;
        line-height: 1.5;
    }

    /* Content Cards (精选条目) */
    .content-card {
        background: var(--bg-card);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-sm);
        overflow: hidden;
        transition: var(--transition);
        height: 100%;
        border: 1px solid var(--border);
        display: flex;
        flex-direction: column;
    }
    .content-card:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-3px);
    }
    .content-card .card-img-top {
        height: 190px;
        object-fit: cover;
        border-bottom: 1px solid var(--border);
    }
    .content-card .card-body {
        padding: 1.25rem 1.5rem 1.5rem;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .content-card .card-body .badge-tag {
        display: inline-block;
        background: var(--accent);
        color: #fff;
        font-size: 0.75rem;
        font-weight: 600;
        padding: 0.15rem 0.7rem;
        border-radius: 20px;
        margin-bottom: 0.6rem;
        align-self: flex-start;
    }
    .content-card .card-body .card-title {
        font-family: var(--font-title);
        font-size: 1.05rem;
        font-weight: 600;
        color: var(--text);
        line-height: 1.4;
        margin-bottom: 0.5rem;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .content-card .card-body .card-title a {
        color: inherit;
    }
    .content-card .card-body .card-title a:hover {
        color: var(--primary);
    }
    .content-card .card-body .card-text {
        font-size: 0.9rem;
        color: var(--text-light);
        line-height: 1.6;
        flex: 1;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 0.8rem;
    }
    .content-card .card-body .card-meta {
        font-size: 0.8rem;
        color: var(--text-muted);
        display: flex;
        align-items: center;
        gap: 0.8rem;
        border-top: 1px solid var(--border);
        padding-top: 0.7rem;
        margin-top: auto;
    }

    /* Featured Section (特色/证据) */
    .feature-grid .feature-item {
        background: var(--bg-card);
        border-radius: var(--radius-card);
        padding: 2rem 1.8rem;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border);
        transition: var(--transition);
        height: 100%;
        text-align: center;
    }
    .feature-grid .feature-item:hover {
        box-shadow: var(--shadow-md);
        transform: translateY(-3px);
    }
    .feature-grid .feature-item .feat-icon {
        width: 56px;
        height: 56px;
        background: rgba(15,118,110,0.08);
        border-radius: 14px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 1rem;
        font-size: 1.6rem;
        color: var(--primary);
    }
    .feature-grid .feature-item h3 {
        font-family: var(--font-title);
        font-size: 1.1rem;
        font-weight: 600;
        margin-bottom: 0.5rem;
    }
    .feature-grid .feature-item p {
        font-size: 0.9rem;
        color: var(--text-light);
        margin-bottom: 0;
        line-height: 1.6;
    }

    /* Trust / Social Proof */
    .trust-badge {
        background: var(--bg-card);
        border-radius: var(--radius-card);
        padding: 1.5rem 2rem;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border);
        display: flex;
        align-items: center;
        gap: 2rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    .trust-badge .trust-item {
        font-size: 1.1rem;
        font-weight: 600;
        color: var(--text-light);
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }
    .trust-badge .trust-item i { color: var(--accent); font-size: 1.3rem; }

    /* FAQ */
    .faq-section .accordion-item {
        border: 1px solid var(--border);
        border-radius: var(--radius-card) !important;
        overflow: hidden;
        margin-bottom: 0.8rem;
        background: var(--bg-card);
    }
    .faq-section .accordion-button {
        font-family: var(--font-title);
        font-size: 1rem;
        font-weight: 600;
        color: var(--text);
        background: var(--bg-card);
        padding: 1.2rem 1.5rem;
        border: none;
        box-shadow: none;
    }
    .faq-section .accordion-button:not(.collapsed) {
        color: var(--primary);
        background: rgba(15,118,110,0.04);
    }
    .faq-section .accordion-button::after {
        background-size: 1rem;
        transition: var(--transition);
    }
    .faq-section .accordion-button:focus { box-shadow: none; }
    .faq-section .accordion-body {
        padding: 0.2rem 1.5rem 1.2rem;
        color: var(--text-light);
        font-size: 0.95rem;
        line-height: 1.7;
    }

    /* CTA */
    .cta-section {
        background: linear-gradient(135deg, #0F766E, #0B5E56);
        padding: 4rem 0;
        color: #fff;
        text-align: center;
    }
    .cta-section h2 {
        font-family: var(--font-title);
        font-size: 2rem;
        font-weight: 700;
        margin-bottom: 1rem;
    }
    .cta-section p {
        font-size: 1.05rem;
        color: rgba(255,255,255,0.85);
        max-width: 600px;
        margin: 0 auto 2rem;
    }
    .cta-section .btn-primary-custom {
        background: #fff;
        color: var(--primary);
        border: none;
        padding: 0.7rem 2.4rem;
        font-size: 1.05rem;
    }
    .cta-section .btn-primary-custom:hover {
        background: var(--accent);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(0,0,0,0.2);
    }

    /* Footer */
    .site-footer {
        background: #1E293B;
        color: rgba(255,255,255,0.7);
        padding: 3.5rem 0 1.5rem;
    }
    .site-footer h5 {
        font-family: var(--font-title);
        font-size: 1rem;
        font-weight: 600;
        color: #fff;
        margin-bottom: 1rem;
    }
    .site-footer a {
        color: rgba(255,255,255,0.6);
        font-size: 0.9rem;
        display: block;
        padding: 0.2rem 0;
        transition: var(--transition);
    }
    .site-footer a:hover {
        color: var(--accent);
    }
    .site-footer .footer-brand {
        font-family: var(--font-title);
        font-size: 1.3rem;
        font-weight: 700;
        color: #fff;
        margin-bottom: 0.5rem;
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }
    .site-footer .footer-brand .brand-icon {
        width: 30px;
        height: 30px;
        background: var(--primary);
        border-radius: 6px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 1rem;
    }
    .site-footer .footer-desc {
        font-size: 0.9rem;
        color: rgba(255,255,255,0.5);
        max-width: 280px;
        line-height: 1.6;
    }
    .site-footer .social-links {
        display: flex;
        gap: 0.8rem;
        margin-top: 1rem;
    }
    .site-footer .social-links a {
        width: 36px;
        height: 36px;
        border-radius: 8px;
        background: rgba(255,255,255,0.08);
        display: flex;
        align-items: center;
        justify-content: center;
        color: rgba(255,255,255,0.6);
        font-size: 1rem;
        transition: var(--transition);
    }
    .site-footer .social-links a:hover {
        background: var(--primary);
        color: #fff;
    }
    .site-footer .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.08);
        padding-top: 1.5rem;
        margin-top: 2.5rem;
        font-size: 0.85rem;
        color: rgba(255,255,255,0.4);
        text-align: center;
    }

    /* Float CTA */
    .float-cta {
        position: fixed;
        bottom: 2rem;
        right: 2rem;
        z-index: 1050;
        display: flex;
        flex-direction: column;
        gap: 0.6rem;
    }
    .float-cta .float-btn {
        width: 48px;
        height: 48px;
        border-radius: 50%;
        background: var(--accent);
        color: #fff;
        border: none;
        box-shadow: 0 4px 16px rgba(245,158,11,0.35);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        cursor: pointer;
        transition: var(--transition);
    }
    .float-cta .float-btn:hover {
        transform: scale(1.1);
        box-shadow: 0 6px 24px rgba(245,158,11,0.45);
    }
    .float-cta .float-btn.secondary {
        background: var(--bg-card);
        color: var(--text);
        box-shadow: 0 4px 16px rgba(0,0,0,0.1);
    }
    .float-cta .float-btn.secondary:hover {
        background: var(--primary);
        color: #fff;
    }

    /* Search Modal */
    .search-modal {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.5);
        backdrop-filter: blur(8px);
        z-index: 1060;
        align-items: flex-start;
        justify-content: center;
        padding-top: 12vh;
    }
    .search-modal.active { display: flex; }
    .search-modal .search-panel {
        background: var(--bg-card);
        border-radius: 16px;
        padding: 1.8rem 2rem;
        width: 100%;
        max-width: 580px;
        box-shadow: var(--shadow-lg);
    }
    .search-modal .search-panel input {
        width: 100%;
        border: 1.5px solid var(--border);
        border-radius: 8px;
        padding: 0.8rem 1.2rem;
        font-size: 1rem;
        outline: none;
        transition: var(--transition);
        background: var(--bg);
    }
    .search-modal .search-panel input:focus {
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(15,118,110,0.12);
    }
    .search-modal .search-panel .search-hint {
        font-size: 0.85rem;
        color: var(--text-muted);
        margin-top: 0.8rem;
        display: flex;
        gap: 1rem;
    }

    /* Misc */
    .empty-state {
        text-align: center;
        padding: 3rem 1rem;
        color: var(--text-muted);
    }
    .empty-state i { font-size: 2.5rem; margin-bottom: 1rem; display: block; }
    .badge-primary {
        background: var(--primary);
        color: #fff;
        font-weight: 500;
        padding: 0.2rem 0.7rem;
        border-radius: 20px;
        font-size: 0.8rem;
    }
    .divider-custom {
        width: 48px;
        height: 3px;
        background: var(--accent);
        border-radius: 2px;
        margin: 0.5rem 0 1.5rem;
    }

    /* Responsive */
    @media (max-width: 991.98px) {
        .hero { min-height: auto; padding: 4rem 0; }
        .hero h1 { font-size: 2.2rem; }
        .hero p { font-size: 1rem; }
        .hero-stats { gap: 1.5rem; }
        .hero-stats .stat-number { font-size: 1.4rem; }
        .site-header .navbar-collapse {
            background: rgba(255,255,255,0.98);
            border-radius: 12px;
            padding: 1rem;
            box-shadow: var(--shadow-md);
            margin-top: 0.5rem;
        }
    }
    @media (max-width: 767.98px) {
        .hero h1 { font-size: 1.8rem; }
        .hero-stats { gap: 1rem; justify-content: center; }
        .hero-stats .stat-item { text-align: center; flex: 1; min-width: 80px; }
        section { padding: 3rem 0; }
        .section-title { font-size: 1.6rem; }
        .category-grid .cat-card .cat-img { height: 160px; }
        .float-cta { bottom: 1.2rem; right: 1.2rem; }
        .float-cta .float-btn { width: 42px; height: 42px; font-size: 1rem; }
        .cta-section h2 { font-size: 1.5rem; }
        .feature-grid .feature-item { padding: 1.5rem 1.2rem; }
    }
    @media (max-width: 575.98px) {
        .hero h1 { font-size: 1.5rem; }
        .hero p { font-size: 0.9rem; }
        .hero .btn-group-hero { flex-direction: column; gap: 0.6rem; }
        .hero .btn-group-hero .btn { width: 100%; text-align: center; }
        .site-header .navbar-brand { font-size: 1.15rem; }
        .site-header .navbar-brand .brand-icon { width: 28px; height: 28px; font-size: 0.9rem; }
        .section-title { font-size: 1.35rem; }
        .container { padding-left: 16px; padding-right: 16px; }
        .content-card .card-img-top { height: 150px; }
        .trust-badge { padding: 1.2rem 1rem; gap: 1rem; }
        .trust-badge .trust-item { font-size: 0.9rem; }
        .search-modal { padding-top: 10vh; }
        .search-modal .search-panel { margin: 0 1rem; padding: 1.2rem 1.5rem; }
        .site-footer { padding: 2.5rem 0 1rem; }
        .site-footer .footer-brand { font-size: 1.1rem; }
    }

/* roulang page: article */
:root {
            --primary: #0F766E;
            --primary-dark: #0B5E58;
            --primary-light: #E0F2F1;
            --accent: #F59E0B;
            --accent-light: #FEF3C7;
            --bg: #F8FAFC;
            --bg-card: #FFFFFF;
            --text: #1E293B;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-sm: 6px;
            --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
            --shadow: 0 4px 6px -1px rgba(0,0,0,0.06), 0 2px 4px -1px rgba(0,0,0,0.03);
            --shadow-lg: 0 10px 25px -3px rgba(0,0,0,0.08), 0 4px 8px -2px rgba(0,0,0,0.04);
            --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            --font-heading: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
            --transition: all 0.2s ease;
        }

        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); font-weight: 600; line-height: 1.3; color: var(--text); }
        .container { max-width: 1320px; padding-left: 20px; padding-right: 20px; }

        /* ── Header / Nav ── */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky; top: 0; z-index: 1020;
            box-shadow: 0 1px 3px rgba(0,0,0,0.03);
        }
        .site-header .navbar { padding: 0.75rem 0; }
        .site-header .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .site-header .navbar-brand .brand-icon {
            width: 36px; height: 36px;
            background: var(--primary);
            border-radius: 8px;
            display: flex; align-items: center; justify-content: center;
            color: #fff; font-size: 1.1rem;
        }
        .site-header .navbar-brand:hover { color: var(--primary-dark); }
        .site-header .nav-link {
            font-weight: 500;
            color: var(--text-secondary);
            padding: 0.5rem 1rem !important;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .site-header .nav-link:hover { color: var(--primary); background: var(--primary-light); }
        .site-header .nav-link.active { color: var(--primary); background: var(--primary-light); }
        .site-header .navbar-toggler {
            border: none; color: var(--text);
            padding: 0.25rem 0.5rem;
            font-size: 1.25rem;
        }
        .site-header .navbar-toggler:focus { box-shadow: none; }

        .search-trigger {
            display: flex; align-items: center;
            gap: 0.4rem; padding: 0.35rem 0.8rem;
            border: 1px solid var(--border);
            border-radius: 20px;
            background: var(--bg);
            color: var(--text-secondary);
            font-size: 0.85rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .search-trigger:hover { border-color: var(--primary); background: var(--primary-light); color: var(--primary); }
        .search-trigger kbd {
            font-size: 0.7rem;
            background: var(--border);
            border-radius: 4px;
            padding: 0.08rem 0.35rem;
            color: var(--text-muted);
            font-family: inherit;
            border: 1px solid var(--border);
            margin-left: 0.2rem;
        }
        .btn-primary-custom {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: 0.5rem 1.5rem;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            font-family: var(--font-body);
        }
        .btn-primary-custom:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow); }
        .btn-primary-custom:active { transform: translateY(0); }
        .btn-outline-custom {
            background: transparent; color: var(--primary);
            border: 1.5px solid var(--primary);
            border-radius: var(--radius-btn);
            padding: 0.5rem 1.5rem;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            font-family: var(--font-body);
        }
        .btn-outline-custom:hover { background: var(--primary); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow); }

        /* ── Search Modal ── */
        .search-overlay {
            position: fixed; top: 0; left: 0; width: 100%; height: 100%;
            background: rgba(0,0,0,0.55);
            backdrop-filter: blur(6px);
            z-index: 9999;
            display: none; align-items: center; justify-content: center;
            padding: 20px;
        }
        .search-overlay.show { display: flex; }
        .search-overlay-inner {
            background: #fff;
            border-radius: 16px;
            padding: 2rem 1.5rem;
            width: 100%; max-width: 560px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.2);
            position: relative;
        }
        .search-overlay-inner .close-btn {
            position: absolute; top: 1rem; right: 1.2rem;
            font-size: 1.5rem; color: var(--text-muted);
            cursor: pointer; background: none; border: none;
            transition: var(--transition);
        }
        .search-overlay-inner .close-btn:hover { color: var(--text); transform: rotate(90deg); }
        .search-overlay-inner input {
            width: 100%; padding: 0.8rem 1rem 0.8rem 2.8rem;
            border: 1.5px solid var(--border);
            border-radius: var(--radius-card);
            font-size: 1rem;
            transition: var(--transition);
            background: var(--bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'/%3E%3C/svg%3E") 1rem 50% no-repeat;
        }
        .search-overlay-inner input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(15,118,110,0.12); }
        .search-overlay-inner .hint { color: var(--text-muted); font-size: 0.8rem; margin-top: 0.8rem; text-align: center; }

        /* ── Article Hero ── */
        .article-hero {
            padding: 3rem 0 2rem;
            background: linear-gradient(135deg, #F0FDFA 0%, #F8FAFC 60%);
            border-bottom: 1px solid var(--border-light);
            position: relative;
        }
        .article-hero::after {
            content: '';
            position: absolute; bottom: 0; left: 0; right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
            opacity: 0.25;
        }
        .article-hero .breadcrumb {
            font-size: 0.85rem;
            background: transparent; padding: 0; margin-bottom: 1.2rem;
        }
        .article-hero .breadcrumb-item a { color: var(--text-muted); }
        .article-hero .breadcrumb-item.active { color: var(--text-secondary); }
        .article-hero .breadcrumb-item + .breadcrumb-item::before { content: '›'; color: var(--text-muted); }
        .article-hero h1 {
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 1rem;
            max-width: 900px;
        }
        .article-hero .meta {
            display: flex; flex-wrap: wrap; gap: 1.2rem;
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 1.5rem;
        }
        .article-hero .meta i { margin-right: 0.3rem; color: var(--text-muted); }
        .article-hero .meta .badge-custom {
            background: var(--accent-light);
            color: #B45309;
            padding: 0.2rem 0.8rem;
            border-radius: 20px;
            font-weight: 500;
            font-size: 0.8rem;
        }
        .article-hero .featured-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow);
            max-height: 420px;
            object-fit: cover;
            width: 100%;
        }

        /* ── Article Content ── */
        .article-content-section {
            padding: 3rem 0;
        }
        .article-content-section .article-body {
            max-width: 800px;
            margin: 0 auto;
        }
        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 600;
            margin-top: 2rem;
            margin-bottom: 0.8rem;
            color: var(--text);
            border-bottom: 2px solid var(--primary-light);
            padding-bottom: 0.4rem;
        }
        .article-body h3 {
            font-size: 1.3rem;
            font-weight: 600;
            margin-top: 1.6rem;
            margin-bottom: 0.6rem;
        }
        .article-body p {
            margin-bottom: 1.2rem;
            color: var(--text-secondary);
        }
        .article-body ul, .article-body ol {
            margin-bottom: 1.2rem;
            padding-left: 1.5rem;
            color: var(--text-secondary);
        }
        .article-body li { margin-bottom: 0.3rem; }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: normal;
        }
        .article-body blockquote p:last-child { margin-bottom: 0; }
        .article-body code {
            background: #1E293B;
            color: #E2E8F0;
            padding: 0.15rem 0.5rem;
            border-radius: 4px;
            font-size: 0.85rem;
            font-family: 'JetBrains Mono', 'Fira Code', monospace;
        }
        .article-body pre {
            background: #1E293B;
            color: #E2E8F0;
            padding: 1.2rem;
            border-radius: var(--radius-card);
            overflow-x: auto;
            margin: 1.5rem 0;
            font-size: 0.85rem;
            line-height: 1.6;
        }
        .article-body pre code { background: none; padding: 0; color: inherit; }
        .article-body img {
            border-radius: var(--radius-card);
            margin: 1.5rem auto;
            box-shadow: var(--shadow-sm);
        }
        .article-body .tag-list {
            display: flex; flex-wrap: wrap; gap: 0.5rem;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border);
        }
        .article-body .tag-list .tag {
            background: var(--bg);
            color: var(--text-secondary);
            padding: 0.2rem 1rem;
            border-radius: 20px;
            font-size: 0.8rem;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .article-body .tag-list .tag:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-light); }

        /* ── Not Found ── */
        .not-found-section {
            padding: 4rem 0;
            text-align: center;
        }
        .not-found-section .nf-icon {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
        }
        .not-found-section h2 { color: var(--text); margin-bottom: 0.8rem; }
        .not-found-section p { color: var(--text-secondary); margin-bottom: 1.5rem; }

        /* ── Related Posts ── */
        .related-section {
            padding: 3rem 0;
            background: #fff;
            border-top: 1px solid var(--border-light);
        }
        .related-section .section-title {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 2rem;
            text-align: center;
        }
        .related-section .section-title span { color: var(--primary); }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
            border: 1px solid var(--border-light);
        }
        .related-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
        .related-card .card-img {
            height: 180px;
            object-fit: cover;
            width: 100%;
        }
        .related-card .card-body {
            padding: 1.2rem;
        }
        .related-card .card-body h5 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.4rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0.5rem;
        }
        .related-card .card-body .meta {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* ── CTA Section ── */
        .cta-section {
            padding: 4rem 0;
            background: linear-gradient(135deg, var(--primary) 0%, #0B5E58 100%);
            color: #fff;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.8rem;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.85);
            max-width: 600px;
            margin: 0 auto 1.8rem;
        }
        .cta-section .btn-cta {
            background: var(--accent);
            color: #1E293B;
            border: none;
            border-radius: var(--radius-btn);
            padding: 0.7rem 2.5rem;
            font-weight: 700;
            font-size: 1rem;
            transition: var(--transition);
            font-family: var(--font-body);
        }
        .cta-section .btn-cta:hover { background: #D97706; color: #fff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0,0,0,0.2); }
        .cta-section .btn-outline-cta {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255,255,255,0.6);
            border-radius: var(--radius-btn);
            padding: 0.7rem 2rem;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            margin-left: 0.8rem;
            font-family: var(--font-body);
        }
        .cta-section .btn-outline-cta:hover { background: rgba(255,255,255,0.1); border-color: #fff; }

        /* ── Footer ── */
        .site-footer {
            background: #0F172A;
            color: rgba(255,255,255,0.7);
            padding: 3.5rem 0 0;
        }
        .site-footer .footer-brand {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.3rem;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 0.8rem;
        }
        .site-footer .footer-brand .brand-icon {
            width: 34px; height: 34px;
            background: var(--primary);
            border-radius: 8px;
            display: flex; align-items: center; justify-content: center;
            color: #fff; font-size: 1rem;
        }
        .site-footer .footer-desc {
            font-size: 0.88rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.55);
            max-width: 320px;
        }
        .site-footer .social-links { display: flex; gap: 0.8rem; margin-top: 1rem; }
        .site-footer .social-links a {
            width: 36px; height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: rgba(255,255,255,0.6);
            display: flex; align-items: center; justify-content: center;
            transition: var(--transition);
            font-size: 1rem;
        }
        .site-footer .social-links a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .site-footer h5 {
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            margin-bottom: 1rem;
        }
        .site-footer a {
            display: block;
            color: rgba(255,255,255,0.5);
            font-size: 0.85rem;
            margin-bottom: 0.5rem;
            transition: var(--transition);
        }
        .site-footer a:hover { color: var(--accent); padding-left: 3px; }
        .site-footer .footer-bottom {
            margin-top: 2.5rem;
            padding: 1.2rem 0;
            border-top: 1px solid rgba(255,255,255,0.06);
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.3);
        }

        /* ── Responsive ── */
        @media (max-width: 991px) {
            .site-header .navbar-nav { margin-top: 0.8rem; }
            .site-header .nav-link { padding: 0.5rem 0 !important; }
            .search-trigger kbd { display: none; }
            .article-hero h1 { font-size: 1.8rem; }
        }
        @media (max-width: 767px) {
            .article-hero h1 { font-size: 1.5rem; }
            .article-hero .meta { gap: 0.8rem; font-size: 0.8rem; }
            .article-content-section .article-body { padding: 0 10px; }
            .article-body h2 { font-size: 1.3rem; }
            .article-body h3 { font-size: 1.1rem; }
            .cta-section h2 { font-size: 1.4rem; }
            .cta-section .btn-outline-cta { margin-left: 0; margin-top: 0.6rem; }
            .related-section .section-title { font-size: 1.2rem; }
            .site-footer .footer-brand { font-size: 1.1rem; }
        }
        @media (max-width: 575px) {
            .site-header .navbar-brand { font-size: 1.1rem; }
            .site-header .navbar-brand .brand-icon { width: 30px; height: 30px; font-size: 0.9rem; }
            .article-hero { padding: 2rem 0 1.5rem; }
            .article-hero h1 { font-size: 1.3rem; }
            .article-hero .meta { flex-direction: column; gap: 0.4rem; }
            .article-content-section { padding: 2rem 0; }
            .article-body { font-size: 0.95rem; }
            .cta-section { padding: 2.5rem 0; }
            .cta-section h2 { font-size: 1.2rem; }
            .cta-section p { font-size: 0.9rem; }
            .related-card .card-img { height: 140px; }
            .search-overlay-inner { padding: 1.5rem 1rem; }
            .search-overlay-inner input { padding: 0.6rem 1rem 0.6rem 2.5rem; font-size: 0.9rem; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0F766E;
            --primary-dark: #0A5D56;
            --primary-light: #14B8A6;
            --primary-bg: rgba(15, 118, 110, 0.06);
            --accent: #F59E0B;
            --accent-light: #FCD34D;
            --bg: #F8FAFC;
            --bg-alt: #F1F5F9;
            --text: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
            --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.08), 0 4px 10px -5px rgba(0, 0, 0, 0.04);
            --transition: all 0.2s ease;
            --font-body: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'Noto Sans', sans-serif;
            --font-heading: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Noto Sans', sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        .container {
            max-width: 1320px;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-heading);
            font-weight: 600;
            line-height: 1.3;
            color: var(--text);
            margin-top: 0;
        }
        h1 {
            font-size: 2.5rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.25rem;
        }
        p {
            margin-top: 0;
            margin-bottom: 1em;
            color: var(--text-secondary);
        }
        .text-center {
            text-align: center;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1040;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
        }
        .site-header .navbar {
            padding: 0.75rem 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
        }
        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--primary);
            text-decoration: none;
            white-space: nowrap;
        }
        .site-header .navbar-brand .brand-icon {
            font-size: 1.5rem;
            color: var(--accent);
        }
        .site-header .navbar-brand:hover {
            color: var(--primary-dark);
        }
        .site-header .navbar-nav {
            gap: 0.25rem;
        }
        .site-header .nav-link {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .site-header .nav-link:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .site-header .nav-link.active {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .site-header .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 1rem;
            right: 1rem;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .navbar-toggler {
            border: none;
            background: transparent;
            font-size: 1.25rem;
            color: var(--text);
            padding: 0.25rem 0.5rem;
            cursor: pointer;
        }
        .navbar-toggler:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        .search-trigger {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.4rem 0.8rem;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            cursor: pointer;
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: var(--transition);
            background: var(--bg);
        }
        .search-trigger:hover {
            border-color: var(--primary);
            background: var(--primary-bg);
        }
        .search-trigger kbd {
            font-size: 0.7rem;
            padding: 0.1rem 0.4rem;
            background: #e2e8f0;
            border-radius: 3px;
            font-family: monospace;
            margin-left: 0.2rem;
            color: var(--text-muted);
        }
        .btn-primary-custom {
            background: var(--primary);
            color: #fff;
            border: 1px solid var(--primary);
            padding: 0.5rem 1.5rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-primary-custom:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow);
        }
        .btn-primary-custom:active {
            transform: translateY(0);
        }
        .btn-outline-custom {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
            padding: 0.5rem 1.5rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-outline-custom:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow);
        }
        .btn-outline-custom:active {
            transform: translateY(0);
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            padding: 6rem 0 5rem;
            background: linear-gradient(135deg, #0F766E 0%, #0A5D56 60%, #0D9488 100%);
            color: #fff;
            overflow: hidden;
            min-height: 480px;
            display: flex;
            align-items: center;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }
        .hero-section .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 118, 110, 0.85) 0%, rgba(10, 93, 86, 0.92) 100%);
            pointer-events: none;
        }
        .hero-section .container {
            position: relative;
            z-index: 2;
        }
        .hero-section h1 {
            font-size: 2.8rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }
        .hero-section .hero-sub {
            font-size: 1.25rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            line-height: 1.6;
            margin-bottom: 2rem;
        }
        .hero-section .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .hero-section .btn-hero-primary {
            background: var(--accent);
            color: #1e293b;
            border: none;
            padding: 0.75rem 2rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
        }
        .hero-section .btn-hero-primary:hover {
            background: #d97706;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
            color: #1e293b;
        }
        .hero-section .btn-hero-secondary {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.6);
            padding: 0.75rem 2rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
        }
        .hero-section .btn-hero-secondary:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            transform: translateY(-2px);
        }
        .hero-section .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            padding: 0.35rem 1rem;
            border-radius: 100px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 1.5rem;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero-section .hero-badge i {
            color: var(--accent-light);
        }

        /* ===== Section Spacing ===== */
        .section-padding {
            padding: 5rem 0;
        }
        .section-padding-sm {
            padding: 3rem 0;
        }
        .section-title {
            margin-bottom: 0.75rem;
            font-weight: 700;
        }
        .section-subtitle {
            color: var(--text-secondary);
            max-width: 700px;
            margin: 0 auto 3rem;
            font-size: 1.1rem;
        }
        .bg-alt {
            background: var(--bg-alt);
        }

        /* ===== Cards ===== */
        .card-custom {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
        }
        .card-custom:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--primary-light);
        }
        .card-custom .card-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 1rem;
        }
        .card-custom .card-icon.accent {
            color: var(--accent);
        }
        .card-custom h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        .card-custom p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        .card-custom .badge-tag {
            display: inline-block;
            background: var(--accent);
            color: #1e293b;
            padding: 0.15rem 0.7rem;
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
        }

        /* ===== Scene Cards (图文) ===== */
        .scene-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
            border: 1px solid var(--border);
        }
        .scene-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .scene-card .scene-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .scene-card .scene-body {
            padding: 1.5rem;
        }
        .scene-card .scene-body h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 0.4rem;
        }
        .scene-card .scene-body p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        .scene-card .scene-tag {
            display: inline-block;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 0.2rem 0.8rem;
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 0.6rem;
        }

        /* ===== Steps / Process ===== */
        .step-item {
            text-align: center;
            padding: 1.5rem 1rem;
            position: relative;
        }
        .step-item .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 1rem;
            box-shadow: 0 4px 12px rgba(15, 118, 110, 0.25);
        }
        .step-item .step-number.accent {
            background: var(--accent);
            box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
        }
        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 0.4rem;
        }
        .step-item p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            max-width: 260px;
            margin-left: auto;
            margin-right: auto;
        }
        .step-connector {
            display: none;
        }
        @media (min-width: 768px) {
            .step-connector {
                display: flex;
                align-items: center;
                justify-content: center;
                font-size: 1.5rem;
                color: var(--border);
            }
        }

        /* ===== Tech Block ===== */
        .tech-block {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .tech-block .tech-img {
            width: 100%;
            height: 100%;
            min-height: 320px;
            object-fit: cover;
        }
        .tech-block .tech-body {
            padding: 2.5rem;
        }
        .tech-block .tech-body h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .tech-block .tech-body ul {
            list-style: none;
            padding: 0;
            margin: 0 0 1.5rem;
        }
        .tech-block .tech-body ul li {
            padding: 0.4rem 0;
            display: flex;
            align-items: flex-start;
            gap: 0.6rem;
            font-size: 0.95rem;
            color: var(--text-secondary);
        }
        .tech-block .tech-body ul li i {
            color: var(--primary);
            margin-top: 0.2rem;
            flex-shrink: 0;
        }

        /* ===== FAQ ===== */
        .faq-accordion .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius) !important;
            margin-bottom: 0.75rem;
            overflow: hidden;
            background: #fff;
            box-shadow: var(--shadow);
        }
        .faq-accordion .accordion-button {
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            background: #fff;
            padding: 1.2rem 1.5rem;
            border: none;
            box-shadow: none;
            transition: var(--transition);
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .faq-accordion .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%230F766E' viewBox='0 0 16 16'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
            transition: transform 0.3s ease;
        }
        .faq-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(-180deg);
        }
        .faq-accordion .accordion-body {
            padding: 0.5rem 1.5rem 1.2rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            border-color: var(--primary);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0F766E 0%, #0A5D56 100%);
            padding: 4.5rem 0;
            color: #fff;
            text-align: center;
        }
        .cta-section h2 {
            color: #fff;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 2rem;
            font-size: 1.1rem;
        }
        .cta-section .btn-cta {
            background: var(--accent);
            color: #1e293b;
            border: none;
            padding: 0.85rem 2.5rem;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
        }
        .cta-section .btn-cta:hover {
            background: #d97706;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
            color: #1e293b;
        }
        .cta-section .btn-outline-cta {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.5);
            padding: 0.85rem 2.5rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1.05rem;
            transition: var(--transition);
            margin-left: 0.75rem;
        }
        .cta-section .btn-outline-cta:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
        }
        .cta-section .cta-stats {
            display: flex;
            justify-content: center;
            gap: 3rem;
            margin-top: 2.5rem;
            flex-wrap: wrap;
        }
        .cta-section .cta-stats .stat-num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent-light);
        }
        .cta-section .cta-stats .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0F172A;
            color: rgba(255, 255, 255, 0.7);
            padding: 3.5rem 0 0;
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.25rem;
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .site-footer .footer-brand .brand-icon {
            color: var(--accent);
        }
        .site-footer .footer-desc {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 1.25rem;
            max-width: 320px;
        }
        .site-footer .social-links {
            display: flex;
            gap: 0.75rem;
        }
        .site-footer .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.6);
            font-size: 1rem;
            transition: var(--transition);
        }
        .site-footer .social-links a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .site-footer h5 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        .site-footer a {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            padding: 0.3rem 0;
            transition: var(--transition);
        }
        .site-footer a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 1.5rem 0;
            margin-top: 2.5rem;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .site-footer .footer-bottom a {
            display: inline;
            padding: 0;
        }

        /* ===== Responsive ===== */
        @media (max-width: 991px) {
            .site-header .navbar-collapse {
                background: #fff;
                padding: 1rem;
                border-radius: var(--radius);
                box-shadow: var(--shadow-lg);
                border: 1px solid var(--border);
                margin-top: 0.5rem;
            }
            .site-header .nav-link.active::after {
                display: none;
            }
            .hero-section h1 {
                font-size: 2rem;
            }
            .hero-section .hero-sub {
                font-size: 1rem;
            }
            .section-padding {
                padding: 3.5rem 0;
            }
            .tech-block .tech-body {
                padding: 1.5rem;
            }
            .cta-section .cta-stats {
                gap: 1.5rem;
            }
        }
        @media (max-width: 767px) {
            .hero-section {
                padding: 4rem 0 3rem;
                min-height: auto;
            }
            .hero-section h1 {
                font-size: 1.7rem;
            }
            .hero-section .hero-actions {
                flex-direction: column;
                gap: 0.75rem;
            }
            .hero-section .btn-hero-primary,
            .hero-section .btn-hero-secondary {
                width: 100%;
                text-align: center;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 2rem;
            }
            .step-item {
                padding: 1rem 0.5rem;
            }
            .tech-block .tech-img {
                min-height: 200px;
            }
            .cta-section .btn-outline-cta {
                margin-left: 0;
                margin-top: 0.75rem;
            }
            .cta-section .cta-stats .stat-num {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 575px) {
            .hero-section h1 {
                font-size: 1.4rem;
            }
            .hero-section .hero-sub {
                font-size: 0.92rem;
            }
            .section-padding {
                padding: 2.5rem 0;
            }
            .card-custom {
                padding: 1.2rem;
            }
            .scene-card .scene-img {
                height: 160px;
            }
            .site-footer .footer-brand {
                font-size: 1.1rem;
            }
        }

        /* ===== Utility ===== */
        .mt-n1 {
            margin-top: -0.25rem;
        }
        .gap-1 {
            gap: 0.5rem;
        }
        .gap-2 {
            gap: 1rem;
        }
        .gap-3 {
            gap: 1.5rem;
        }
        .text-primary {
            color: var(--primary) !important;
        }
        .text-accent {
            color: var(--accent) !important;
        }
        .bg-primary-soft {
            background: var(--primary-bg);
        }

        /* ===== Scroll animation helper ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.show {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== Search Overlay ===== */
        .search-overlay {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(8px);
            z-index: 9999;
            display: none;
            align-items: center;
            justify-content: center;
            padding: 2rem;
        }
        .search-overlay.active {
            display: flex;
        }
        .search-overlay .search-panel {
            background: #fff;
            border-radius: var(--radius);
            padding: 2rem;
            max-width: 600px;
            width: 100%;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
        }
        .search-overlay .search-panel input {
            width: 100%;
            padding: 0.9rem 1.2rem;
            border: 2px solid var(--border);
            border-radius: var(--radius-sm);
            font-size: 1.1rem;
            outline: none;
            transition: var(--transition);
        }
        .search-overlay .search-panel input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
        }
        .search-overlay .search-panel .close-search {
            position: absolute;
            top: 1rem;
            right: 1.5rem;
            font-size: 1.5rem;
            color: var(--text-muted);
            cursor: pointer;
            background: none;
            border: none;
        }
        .search-overlay .search-panel .close-search:hover {
            color: var(--text);
        }
        .search-overlay .search-panel {
            position: relative;
        }

/* roulang page: category3 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0F766E;
            --primary-dark: #0B5E58;
            --primary-light: #D1FAE5;
            --accent: #F59E0B;
            --accent-light: #FEF3C7;
            --bg: #F8FAFC;
            --bg-alt: #F1F5F9;
            --bg-card: #FFFFFF;
            --text: #1E293B;
            --text-secondary: #475569;
            --text-light: #94A3B8;
            --border: #E2E8F0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 6px -1px rgba(0,0,0,0.06), 0 2px 4px -1px rgba(0,0,0,0.03);
            --shadow-hover: 0 10px 25px -5px rgba(0,0,0,0.08), 0 4px 8px -4px rgba(0,0,0,0.04);
            --transition: all 0.2s ease;
            --font-sans: 'Inter', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        .container { max-width: 1320px; padding-left: 1rem; padding-right: 1rem; }
        h1, h2, h3, h4, h5, h6 { font-weight: 600; line-height: 1.3; color: var(--text); margin-bottom: 0.5em; }
        h1 { font-size: 2.5rem; font-weight: 700; }
        h2 { font-size: 2rem; font-weight: 700; }
        h3 { font-size: 1.5rem; font-weight: 600; }
        h4 { font-size: 1.25rem; font-weight: 600; }
        p { margin-bottom: 1em; color: var(--text-secondary); }
        .section-padding { padding: 5rem 0; }
        .section-title { margin-bottom: 1rem; }
        .section-subtitle { font-size: 1.125rem; color: var(--text-secondary); max-width: 700px; margin-bottom: 3rem; }

        /* ===== Header & Nav ===== */
        .site-header {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1050;
            box-shadow: 0 1px 3px rgba(0,0,0,0.03);
            padding: 0.5rem 0;
        }
        .site-header .navbar { padding: 0; }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.01em;
        }
        .navbar-brand .brand-icon {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1rem;
        }
        .navbar-brand:hover { color: var(--primary-dark); }
        .navbar-nav .nav-link {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link:focus {
            color: var(--primary);
            background: var(--primary-light);
        }
        .navbar-nav .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-light);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 1rem;
            right: 1rem;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }
        .navbar-toggler {
            border: none;
            font-size: 1.25rem;
            color: var(--text);
            padding: 0.25rem 0.5rem;
        }
        .navbar-toggler:focus { box-shadow: none; }
        .search-trigger {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.4rem 0.75rem;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            font-size: 0.875rem;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition);
            background: var(--bg);
        }
        .search-trigger:hover {
            border-color: var(--primary);
            background: var(--primary-light);
        }
        .search-trigger kbd {
            background: var(--border);
            padding: 0.1rem 0.35rem;
            border-radius: 4px;
            font-size: 0.7rem;
            font-family: inherit;
            color: var(--text-light);
        }
        .btn-primary-custom {
            background: var(--primary);
            color: #fff;
            border: 2px solid var(--primary);
            padding: 0.45rem 1.5rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .btn-primary-custom:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(15,118,110,0.3);
        }
        .btn-primary-custom:focus { box-shadow: 0 0 0 3px rgba(15,118,110,0.25); }
        .btn-outline-custom {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            padding: 0.45rem 1.5rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .btn-outline-custom:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-outline-custom:focus { box-shadow: 0 0 0 3px rgba(15,118,110,0.25); }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            border: 2px solid var(--accent);
            padding: 0.5rem 1.75rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
        }
        .btn-accent:hover {
            background: #D97706;
            border-color: #D97706;
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(245,158,11,0.35);
        }

        /* ===== Search Modal ===== */
        .search-modal {
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.6);
            backdrop-filter: blur(8px);
            z-index: 2000;
            display: none;
            align-items: center;
            justify-content: center;
            padding: 1rem;
        }
        .search-modal.active { display: flex; }
        .search-modal-inner {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 2rem;
            max-width: 560px;
            width: 100%;
            box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
        }
        .search-modal-inner .form-control {
            border: 2px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 0.75rem 1rem;
            font-size: 1.125rem;
            transition: var(--transition);
        }
        .search-modal-inner .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(15,118,110,0.15);
        }
        .search-modal-inner .btn-close {
            position: absolute;
            top: 1rem;
            right: 1rem;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            padding: 6rem 0 5rem;
            background: linear-gradient(135deg, #0F766E 0%, #0B5E58 40%, #064E3B 100%);
            color: #fff;
            min-height: 420px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .hero-section .container { position: relative; z-index: 1; }
        .hero-section .hero-badge {
            display: inline-block;
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(4px);
            padding: 0.3rem 1rem;
            border-radius: 50px;
            font-size: 0.85rem;
            margin-bottom: 1.5rem;
            border: 1px solid rgba(255,255,255,0.2);
        }
        .hero-section h1 {
            color: #fff;
            font-size: 2.75rem;
            margin-bottom: 1rem;
            letter-spacing: -0.01em;
        }
        .hero-section .lead {
            color: rgba(255,255,255,0.85);
            font-size: 1.2rem;
            max-width: 680px;
            line-height: 1.7;
        }
        .hero-section .hero-actions { margin-top: 2rem; gap: 0.75rem; }

        /* ===== Cards ===== */
        .custom-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.75rem;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
        }
        .custom-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .custom-card .card-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 10px;
            font-size: 1.25rem;
            margin-bottom: 1rem;
        }
        .custom-card h3 { font-size: 1.25rem; margin-bottom: 0.75rem; }
        .custom-card p { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 0; }
        .custom-card .badge-custom {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.6rem;
            border-radius: 50px;
            margin-bottom: 0.75rem;
        }

        /* ===== Process / Timeline ===== */
        .process-step {
            display: flex;
            gap: 1.25rem;
            align-items: flex-start;
            padding: 1.5rem;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .process-step:hover { box-shadow: var(--shadow-hover); }
        .process-step .step-number {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            font-weight: 700;
            font-size: 1.1rem;
        }
        .process-step .step-content h4 { font-size: 1.1rem; margin-bottom: 0.3rem; }
        .process-step .step-content p { font-size: 0.9rem; margin-bottom: 0; }

        /* ===== Feature Grid ===== */
        .feature-item {
            display: flex;
            gap: 1rem;
            padding: 1.25rem;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            transition: var(--transition);
            height: 100%;
        }
        .feature-item:hover { box-shadow: var(--shadow-hover); }
        .feature-item .fi-icon {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--accent-light);
            color: var(--accent);
            border-radius: 8px;
            font-size: 1rem;
        }
        .feature-item .fi-content h4 { font-size: 1rem; margin-bottom: 0.25rem; }
        .feature-item .fi-content p { font-size: 0.875rem; margin-bottom: 0; }

        /* ===== Stats ===== */
        .stat-block {
            text-align: center;
            padding: 1.5rem;
        }
        .stat-block .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-block .stat-label {
            font-size: 0.95rem;
            color: var(--text-secondary);
        }

        /* ===== FAQ Accordion ===== */
        .faq-accordion .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 0.75rem;
            overflow: hidden;
        }
        .faq-accordion .accordion-button {
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text);
            background: var(--bg-card);
            padding: 1.1rem 1.25rem;
            box-shadow: none;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: var(--primary-light);
        }
        .faq-accordion .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%230F766E'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 01.708 0L8 10.293l5.646-5.647a.5.5 0 01.708.708l-6 6a.5.5 0 01-.708 0l-6-6a.5.5 0 010-.708z'/%3E%3C/svg%3E");
            transition: transform 0.3s ease;
        }
        .faq-accordion .accordion-button:not(.collapsed)::after { transform: rotate(180deg); }
        .faq-accordion .accordion-body {
            padding: 1rem 1.25rem 1.25rem;
            background: var(--bg);
            font-size: 0.95rem;
            color: var(--text-secondary);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0F766E 0%, #064E3B 100%);
            color: #fff;
            padding: 4rem 0;
            text-align: center;
        }
        .cta-section h2 { color: #fff; font-size: 2rem; }
        .cta-section p { color: rgba(255,255,255,0.85); max-width: 600px; margin: 0 auto 1.5rem; }
        .cta-section .btn-accent { background: #fff; color: var(--primary); border-color: #fff; }
        .cta-section .btn-accent:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

        /* ===== Footer ===== */
        .site-footer {
            background: #0F172A;
            color: rgba(255,255,255,0.7);
            padding: 4rem 0 2rem;
        }
        .site-footer .footer-brand {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 0.75rem;
        }
        .site-footer .footer-brand .brand-icon {
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            border-radius: 6px;
            color: #fff;
            font-size: 0.9rem;
        }
        .site-footer .footer-desc {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.5);
            max-width: 320px;
            margin-bottom: 1rem;
        }
        .site-footer .social-links { display: flex; gap: 0.75rem; }
        .site-footer .social-links a {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255,255,255,0.08);
            border-radius: 8px;
            color: rgba(255,255,255,0.6);
            font-size: 1rem;
            transition: var(--transition);
        }
        .site-footer .social-links a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .site-footer h5 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }
        .site-footer a {
            display: block;
            color: rgba(255,255,255,0.5);
            font-size: 0.88rem;
            padding: 0.25rem 0;
            transition: var(--transition);
        }
        .site-footer a:hover { color: var(--accent); padding-left: 3px; }
        .site-footer .footer-bottom {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 0.85rem;
            color: rgba(255,255,255,0.35);
        }

        /* ===== Image Cards ===== */
        .img-card {
            border-radius: var(--radius);
            overflow: hidden;
            position: relative;
            background: var(--bg-card);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .img-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
        .img-card img { width: 100%; height: 200px; object-fit: cover; }
        .img-card .img-card-body { padding: 1.25rem; }
        .img-card .img-card-body h4 { font-size: 1.1rem; margin-bottom: 0.3rem; }
        .img-card .img-card-body p { font-size: 0.9rem; margin-bottom: 0; }

        /* ===== Scenarios ===== */
        .scenario-item {
            display: flex;
            gap: 1rem;
            align-items: center;
            padding: 1.25rem;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .scenario-item:hover { box-shadow: var(--shadow-hover); }
        .scenario-item .scenario-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 10px;
            font-size: 1.1rem;
        }
        .scenario-item .scenario-text h4 { font-size: 1rem; margin-bottom: 0.2rem; }
        .scenario-item .scenario-text p { font-size: 0.875rem; margin-bottom: 0; }

        /* ===== Responsive ===== */
        @media (max-width: 991px) {
            .navbar-nav .nav-link.active::after { display: none; }
            .search-trigger kbd { display: none; }
            .hero-section { padding: 4rem 0 3rem; }
            .hero-section h1 { font-size: 2rem; }
            .section-padding { padding: 3rem 0; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.75rem; }
            .stat-block .stat-number { font-size: 2rem; }
        }
        @media (max-width: 767px) {
            .hero-section h1 { font-size: 1.75rem; }
            .hero-section .lead { font-size: 1rem; }
            .section-padding { padding: 2.5rem 0; }
            h2 { font-size: 1.5rem; }
            .custom-card { padding: 1.25rem; }
            .process-step { flex-direction: column; align-items: flex-start; gap: 0.75rem; }
            .process-step .step-number { width: 36px; height: 36px; font-size: 0.95rem; }
            .stat-block .stat-number { font-size: 1.75rem; }
            .cta-section h2 { font-size: 1.5rem; }
            .site-footer .footer-brand { justify-content: center; }
            .site-footer .footer-desc { max-width: 100%; text-align: center; }
            .site-footer .social-links { justify-content: center; }
            .site-footer h5 { text-align: center; }
            .site-footer a { text-align: center; }
        }
        @media (max-width: 575px) {
            html { font-size: 15px; }
            .hero-section { padding: 3rem 0 2.5rem; min-height: auto; }
            .hero-section h1 { font-size: 1.5rem; }
            .container { padding-left: 0.75rem; padding-right: 0.75rem; }
            .section-padding { padding: 2rem 0; }
            .custom-card { padding: 1rem; }
            .feature-item { flex-direction: column; gap: 0.5rem; padding: 1rem; }
            .scenario-item { flex-direction: column; text-align: center; padding: 1rem; }
            .scenario-item .scenario-icon { margin: 0 auto; }
            .btn-primary-custom, .btn-outline-custom, .btn-accent { padding: 0.4rem 1.25rem; font-size: 0.9rem; }
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0F766E;
            --primary-dark: #0B5E57;
            --primary-light: #14A398;
            --secondary: #F59E0B;
            --secondary-light: #FBBF24;
            --background: #F8FAFC;
            --surface: #FFFFFF;
            --text-primary: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border-color: #E2E8F0;
            --border-light: #F1F5F9;
            --radius-card: 12px;
            --radius-btn: 8px;
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
            --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.10), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
            --font-body: 'Inter', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --transition: all 0.2s ease;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background-color: var(--background);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }

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

        h1, h2, h3, h4, h5, h6 {
            font-weight: 600;
            line-height: 1.3;
            margin-top: 0;
            margin-bottom: 0.5em;
            color: var(--text-primary);
        }

        h1 { font-size: 2.5rem; font-weight: 700; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.25rem; }

        p {
            margin-top: 0;
            margin-bottom: 1em;
            color: var(--text-secondary);
        }

        .container {
            max-width: 1320px;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        section {
            padding: 5rem 0;
        }

        /* ===== 按钮 ===== */
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.625rem 1.5rem;
            background-color: var(--primary);
            color: #fff;
            border: 2px solid var(--primary);
            border-radius: var(--radius-btn);
            font-weight: 500;
            font-size: 0.9375rem;
            line-height: 1.5;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-primary-custom:hover {
            background-color: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-primary-custom:focus {
            outline: 2px solid var(--primary-light);
            outline-offset: 2px;
        }
        .btn-primary-custom:active {
            transform: translateY(0);
        }

        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.625rem 1.5rem;
            background-color: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            border-radius: var(--radius-btn);
            font-weight: 500;
            font-size: 0.9375rem;
            line-height: 1.5;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-outline-custom:hover {
            background-color: var(--primary);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-outline-custom:focus {
            outline: 2px solid var(--primary-light);
            outline-offset: 2px;
        }
        .btn-outline-custom:active {
            transform: translateY(0);
        }

        .btn-secondary-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.625rem 1.5rem;
            background-color: var(--secondary);
            color: #fff;
            border: 2px solid var(--secondary);
            border-radius: var(--radius-btn);
            font-weight: 500;
            font-size: 0.9375rem;
            line-height: 1.5;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-secondary-custom:hover {
            background-color: #D97706;
            border-color: #D97706;
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        /* ===== 导航 ===== */
        .site-header {
            background-color: var(--surface);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1050;
            box-shadow: var(--shadow-sm);
        }

        .site-header .navbar {
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
        }

        .site-header .navbar-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-primary);
            text-decoration: none;
        }
        .site-header .navbar-brand:hover {
            color: var(--primary);
        }
        .site-header .navbar-brand .brand-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background-color: var(--primary);
            color: #fff;
            border-radius: 8px;
            font-size: 1rem;
        }

        .site-header .navbar-nav .nav-link {
            font-weight: 500;
            font-size: 0.9375rem;
            color: var(--text-secondary);
            padding: 0.5rem 1rem;
            border-radius: 6px;
            transition: var(--transition);
            position: relative;
        }
        .site-header .navbar-nav .nav-link:hover {
            color: var(--primary);
            background-color: rgba(15, 118, 110, 0.06);
        }
        .site-header .navbar-nav .nav-link.active {
            color: var(--primary);
            background-color: rgba(15, 118, 110, 0.10);
        }
        .site-header .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background-color: var(--primary);
            border-radius: 2px;
        }

        .site-header .search-trigger {
            display: flex;
            align-items: center;
            gap: 0.375rem;
            padding: 0.375rem 0.75rem;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-btn);
            font-size: 0.875rem;
            color: var(--text-muted);
            cursor: pointer;
            transition: var(--transition);
            background-color: var(--background);
        }
        .site-header .search-trigger:hover {
            border-color: var(--primary);
            color: var(--primary);
            background-color: rgba(15, 118, 110, 0.04);
        }
        .site-header .search-trigger kbd {
            font-size: 0.75rem;
            padding: 0.1rem 0.35rem;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            background-color: var(--surface);
            color: var(--text-muted);
            font-family: inherit;
        }

        .navbar-toggler {
            border: none;
            padding: 0.375rem;
            font-size: 1.25rem;
            color: var(--text-primary);
            background: transparent;
            cursor: pointer;
        }
        .navbar-toggler:focus {
            outline: 2px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            padding: 6rem 0 5rem;
            background-color: #0c1a1a;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            color: #fff;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(12, 26, 26, 0.88) 40%, rgba(12, 26, 26, 0.60) 80%);
            z-index: 1;
        }
        .hero-section .container {
            position: relative;
            z-index: 2;
        }
        .hero-section h1 {
            font-size: 2.75rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.5rem;
            letter-spacing: -0.02em;
        }
        .hero-section .hero-sub {
            font-size: 1.25rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin-bottom: 1.5rem;
            line-height: 1.6;
        }
        .hero-section .hero-desc {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.70);
            max-width: 580px;
            margin-bottom: 2rem;
            line-height: 1.7;
        }
        .hero-section .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .hero-section .btn-primary-custom {
            background-color: var(--secondary);
            border-color: var(--secondary);
            color: #0F172A;
            font-weight: 600;
        }
        .hero-section .btn-primary-custom:hover {
            background-color: #D97706;
            border-color: #D97706;
            color: #0F172A;
        }
        .hero-section .btn-outline-custom {
            border-color: rgba(255, 255, 255, 0.5);
            color: #fff;
        }
        .hero-section .btn-outline-custom:hover {
            background-color: rgba(255, 255, 255, 0.15);
            border-color: #fff;
            color: #fff;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 2.5rem;
            margin-top: 2.5rem;
            padding-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }
        .hero-stats .stat-item {
            text-align: center;
        }
        .hero-stats .stat-number {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--secondary);
            line-height: 1.2;
        }
        .hero-stats .stat-label {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 0.25rem;
        }

        /* ===== 通用板块标题 ===== */
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-title h2 {
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
        }
        .section-title p {
            max-width: 600px;
            margin: 0 auto;
            color: var(--text-secondary);
            font-size: 1.0625rem;
        }

        /* ===== 卡片 ===== */
        .card-custom {
            background-color: var(--surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-md);
            padding: 1.5rem;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card-custom:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: var(--border-color);
        }
        .card-custom .card-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            background-color: rgba(15, 118, 110, 0.08);
            color: var(--primary);
            border-radius: 10px;
            font-size: 1.25rem;
            margin-bottom: 1rem;
            flex-shrink: 0;
        }
        .card-custom h3 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        .card-custom p {
            font-size: 0.9375rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            flex-grow: 1;
        }
        .card-custom .card-img-top {
            border-radius: 8px;
            margin-bottom: 1rem;
            object-fit: cover;
            width: 100%;
            height: 180px;
        }

        /* ===== 标签/Badge ===== */
        .badge-custom {
            display: inline-block;
            padding: 0.2rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 500;
            border-radius: 20px;
            background-color: var(--secondary);
            color: #fff;
        }
        .badge-primary {
            background-color: rgba(15, 118, 110, 0.10);
            color: var(--primary);
        }
        .badge-secondary {
            background-color: rgba(245, 158, 11, 0.12);
            color: #B45309;
        }

        /* ===== 能力卡片 ===== */
        .capability-card {
            background-color: var(--surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            padding: 2rem 1.5rem;
            text-align: center;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        .capability-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: var(--border-color);
        }
        .capability-card .cap-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 64px;
            height: 64px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border-radius: 16px;
            font-size: 1.5rem;
            margin-bottom: 1.25rem;
        }
        .capability-card h3 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        .capability-card p {
            font-size: 0.9375rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== 行业场景卡片 ===== */
        .industry-card {
            background-color: var(--surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .industry-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: var(--border-color);
        }
        .industry-card .industry-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .industry-card .industry-body {
            padding: 1.25rem 1.5rem 1.5rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .industry-card .industry-body h3 {
            font-size: 1.0625rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        .industry-card .industry-body p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            flex-grow: 1;
        }

        /* ===== 流程步骤 ===== */
        .step-item {
            display: flex;
            gap: 1.5rem;
            padding: 1.5rem 0;
            border-bottom: 1px solid var(--border-light);
        }
        .step-item:last-child {
            border-bottom: none;
        }
        .step-number {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            background-color: var(--primary);
            color: #fff;
            border-radius: 50%;
            font-weight: 700;
            font-size: 1.125rem;
        }
        .step-content h4 {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 0.375rem;
        }
        .step-content p {
            font-size: 0.9375rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== FAQ 手风琴 ===== */
        .faq-accordion .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-card);
            margin-bottom: 0.75rem;
            overflow: hidden;
            background-color: var(--surface);
        }
        .faq-accordion .accordion-item:first-of-type {
            border-radius: var(--radius-card);
        }
        .faq-accordion .accordion-item:last-of-type {
            border-radius: var(--radius-card);
            margin-bottom: 0;
        }
        .faq-accordion .accordion-button {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-primary);
            background-color: var(--surface);
            padding: 1.125rem 1.5rem;
            border: none;
            box-shadow: none;
            transition: var(--transition);
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--primary);
            background-color: rgba(15, 118, 110, 0.04);
        }
        .faq-accordion .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23475569'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
            transition: transform 0.3s ease;
        }
        .faq-accordion .accordion-button:not(.collapsed)::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%230F766E'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
            transform: rotate(180deg);
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            border-color: var(--primary-light);
        }
        .faq-accordion .accordion-body {
            padding: 0 1.5rem 1.25rem;
            font-size: 0.9375rem;
            color: var(--text-secondary);
            background-color: var(--background);
            border-top: 1px solid var(--border-light);
        }

        /* ===== CTA 区块 ===== */
        .cta-section {
            background-color: var(--primary);
            color: #fff;
            padding: 4rem 0;
        }
        .cta-section h2 {
            color: #fff;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.0625rem;
            max-width: 560px;
            margin: 0 auto 1.5rem;
        }
        .cta-section .btn-primary-custom {
            background-color: var(--secondary);
            border-color: var(--secondary);
            color: #0F172A;
            font-weight: 600;
            font-size: 1rem;
            padding: 0.75rem 2rem;
        }
        .cta-section .btn-primary-custom:hover {
            background-color: #D97706;
            border-color: #D97706;
        }
        .cta-section .btn-outline-custom {
            border-color: rgba(255, 255, 255, 0.5);
            color: #fff;
            font-size: 1rem;
            padding: 0.75rem 2rem;
        }
        .cta-section .btn-outline-custom:hover {
            background-color: rgba(255, 255, 255, 0.15);
            border-color: #fff;
            color: #fff;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background-color: #0F172A;
            color: rgba(255, 255, 255, 0.70);
            padding: 4rem 0 0;
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.25rem;
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .site-footer .footer-brand .brand-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background-color: var(--primary);
            color: #fff;
            border-radius: 8px;
            font-size: 1rem;
        }
        .site-footer .footer-desc {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
            margin-bottom: 1.25rem;
            line-height: 1.6;
        }
        .site-footer h5 {
            font-size: 0.875rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
            letter-spacing: 0.02em;
        }
        .site-footer a {
            display: block;
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.55);
            padding: 0.3rem 0;
            transition: var(--transition);
        }
        .site-footer a:hover {
            color: var(--secondary);
        }
        .site-footer .social-links {
            display: flex;
            gap: 0.75rem;
            margin-top: 1rem;
        }
        .site-footer .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background-color: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.60);
            border-radius: 8px;
            font-size: 1rem;
            padding: 0;
            transition: var(--transition);
        }
        .site-footer .social-links a:hover {
            background-color: var(--primary);
            color: #fff;
        }
        .site-footer .footer-bottom {
            margin-top: 3rem;
            padding: 1.5rem 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.35);
            text-align: center;
        }

        /* ===== 搜索弹窗 ===== */
        .search-overlay {
            position: fixed;
            inset: 0;
            background-color: rgba(15, 23, 42, 0.92);
            z-index: 2000;
            display: none;
            align-items: flex-start;
            justify-content: center;
            padding-top: 12vh;
        }
        .search-overlay.open {
            display: flex;
        }
        .search-overlay .search-modal {
            width: 100%;
            max-width: 600px;
            background-color: var(--surface);
            border-radius: 16px;
            padding: 1.5rem;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
            margin: 0 1rem;
        }
        .search-overlay .search-modal input {
            width: 100%;
            padding: 0.75rem 1rem;
            font-size: 1rem;
            border: 2px solid var(--border-color);
            border-radius: var(--radius-btn);
            outline: none;
            transition: var(--transition);
            background-color: var(--background);
            color: var(--text-primary);
        }
        .search-overlay .search-modal input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
        }
        .search-overlay .search-modal .close-search {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background-color: var(--background);
            color: var(--text-muted);
            border: none;
            cursor: pointer;
            transition: var(--transition);
            font-size: 1rem;
        }
        .search-overlay .search-modal .close-search:hover {
            background-color: var(--border-color);
            color: var(--text-primary);
        }

        /* ===== 浮动按钮 ===== */
        .float-cta {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            z-index: 1030;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .float-cta .float-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background-color: var(--secondary);
            color: #0F172A;
            border: none;
            box-shadow: var(--shadow-lg);
            cursor: pointer;
            transition: var(--transition);
            font-size: 1.125rem;
        }
        .float-cta .float-btn:hover {
            transform: scale(1.08);
            box-shadow: var(--shadow-hover);
        }
        .float-cta .float-btn.share-btn {
            background-color: var(--surface);
            color: var(--primary);
            border: 1px solid var(--border-color);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991px) {
            .site-header .navbar-nav .nav-link.active::after {
                display: none;
            }
            .site-header .navbar-nav .nav-link {
                padding: 0.6rem 1rem;
            }
            .hero-section h1 {
                font-size: 2.25rem;
            }
            .hero-section .hero-sub {
                font-size: 1.125rem;
            }
            .hero-stats {
                gap: 1.5rem;
            }
            .hero-stats .stat-number {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 767px) {
            section {
                padding: 3.5rem 0;
            }
            .hero-section {
                padding: 4rem 0 3rem;
            }
            .hero-section h1 {
                font-size: 1.75rem;
            }
            .hero-section .hero-sub {
                font-size: 1rem;
            }
            .hero-section .hero-desc {
                font-size: 0.9375rem;
            }
            .hero-stats {
                gap: 1rem;
                justify-content: center;
            }
            .hero-stats .stat-number {
                font-size: 1.25rem;
            }
            .hero-stats .stat-label {
                font-size: 0.75rem;
            }
            .section-title h2 {
                font-size: 1.625rem;
            }
            .step-item {
                flex-direction: column;
                gap: 0.75rem;
                padding: 1rem 0;
            }
            .step-number {
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
            .float-cta {
                bottom: 1rem;
                right: 1rem;
            }
            .float-cta .float-btn {
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
            .cta-section {
                padding: 3rem 0;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .site-footer {
                padding: 3rem 0 0;
            }
            .site-footer .footer-bottom {
                margin-top: 2rem;
                padding: 1rem 0;
            }
        }

        @media (max-width: 575px) {
            body {
                font-size: 15px;
            }
            h1 { font-size: 1.5rem; }
            h2 { font-size: 1.375rem; }
            h3 { font-size: 1.125rem; }
            .hero-section h1 {
                font-size: 1.5rem;
            }
            .hero-section .hero-actions {
                flex-direction: column;
            }
            .hero-section .hero-actions .btn {
                width: 100%;
            }
            .section-title {
                margin-bottom: 2rem;
            }
            .card-custom {
                padding: 1.25rem;
            }
            .capability-card {
                padding: 1.5rem 1rem;
            }
            .industry-card .industry-body {
                padding: 1rem 1.25rem 1.25rem;
            }
            .faq-accordion .accordion-button {
                font-size: 0.9375rem;
                padding: 1rem 1.25rem;
            }
            .faq-accordion .accordion-body {
                padding: 0 1.25rem 1rem;
                font-size: 0.875rem;
            }
            .float-cta .float-btn {
                width: 38px;
                height: 38px;
                font-size: 0.875rem;
            }
        }