/* roulang page: index */
:root {
        --primary: #0f1c2e;
        --primary-light: #1b2f4a;
        --primary-dark: #0a1522;
        --accent: #f5a623;
        --accent-dark: #d48a0f;
        --accent-light: #ffe0a3;
        --bg-body: #f5f7fb;
        --bg-white: #ffffff;
        --bg-soft: #edf0f5;
        --text-main: #1d2939;
        --text-muted: #667085;
        --border-color: #e4e8ef;
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-lg: 22px;
        --shadow-xs: 0 2px 6px rgba(15, 28, 46, 0.05);
        --shadow-sm: 0 2px 12px rgba(15, 28, 46, 0.06);
        --shadow-md: 0 6px 24px rgba(15, 28, 46, 0.08);
        --shadow-lg: 0 14px 44px rgba(15, 28, 46, 0.12);
        --transition: all 0.3s ease;
        --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    }

    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
        font-family: var(--font-sans);
        background: var(--bg-body);
        color: var(--text-main);
        line-height: 1.7;
        overflow-x: hidden;
        -webkit-font-smoothing: antialiased;
    }
    img { max-width: 100%; display: block; }
    a { text-decoration: none; color: inherit; transition: var(--transition); }
    a:hover { color: inherit; }
    ul, ol { list-style: none; }
    button, input, textarea { font-family: inherit; }
    .container { max-width: 1200px; }

    .section { padding: 90px 0; }
    .section-head { text-align: center; max-width: 720px; margin: 0 auto 50px; }
    .section-head .sec-label {
        display: inline-block;
        background: rgba(245, 166, 35, 0.12);
        color: var(--accent-dark);
        font-size: 0.82rem;
        font-weight: 700;
        letter-spacing: 1px;
        padding: 6px 18px;
        border-radius: 50px;
        margin-bottom: 14px;
        text-transform: uppercase;
    }
    .section-head h2 {
        font-size: 2.1rem;
        font-weight: 800;
        color: var(--primary);
        margin-bottom: 12px;
        line-height: 1.3;
    }
    .section-head p { color: var(--text-muted); font-size: 1.02rem; }

    .btn-accent {
        background: var(--accent);
        color: #fff;
        border: none;
        border-radius: 50px;
        padding: 12px 32px;
        font-weight: 700;
        font-size: 0.95rem;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        box-shadow: 0 6px 18px rgba(245, 166, 35, 0.3);
        transition: var(--transition);
    }
    .btn-accent:hover {
        background: var(--accent-dark);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 10px 26px rgba(212, 138, 15, 0.35);
    }
    .btn-outline-light-custom {
        background: transparent;
        color: #fff;
        border: 1.5px solid rgba(255, 255, 255, 0.5);
        border-radius: 50px;
        padding: 11px 30px;
        font-weight: 600;
        font-size: 0.95rem;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        transition: var(--transition);
    }
    .btn-outline-light-custom:hover {
        background: rgba(255, 255, 255, 0.15);
        border-color: #fff;
        color: #fff;
        transform: translateY(-2px);
    }
    .btn-primary {
        background: var(--accent);
        border-color: var(--accent);
        color: #fff;
        border-radius: 50px;
        padding: 10px 26px;
        font-weight: 600;
        font-size: 0.9rem;
        transition: var(--transition);
    }
    .btn-primary:hover {
        background: var(--accent-dark);
        border-color: var(--accent-dark);
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(245, 166, 35, 0.3);
    }

    .badge {
        background: rgba(245, 166, 35, 0.15);
        color: var(--accent-dark);
        font-weight: 600;
        padding: 6px 14px;
        border-radius: 50px;
        font-size: 0.78rem;
    }

    /* ============ Header / Nav ============ */
    .site-header {
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-xs);
        position: sticky;
        top: 0;
        z-index: 1050;
    }
    .site-header .navbar { padding: 14px 0; }
    .navbar-brand {
        font-weight: 800;
        font-size: 1.2rem;
        color: var(--primary) !important;
        display: flex;
        align-items: center;
        gap: 8px;
        letter-spacing: 0.3px;
        white-space: normal;
        line-height: 1.2;
    }
    .navbar-brand .brand-icon {
        width: 38px;
        height: 38px;
        background: linear-gradient(135deg, var(--accent), var(--accent-dark));
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 1.1rem;
        flex-shrink: 0;
        box-shadow: 0 4px 12px rgba(245, 166, 35, 0.3);
    }
    .navbar-nav { gap: 4px; }
    .navbar-nav .nav-link {
        color: var(--text-muted) !important;
        font-weight: 500;
        font-size: 0.92rem;
        padding: 9px 20px !important;
        border-radius: 50px;
        margin: 0 3px;
        transition: var(--transition);
        white-space: nowrap;
    }
    .navbar-nav .nav-link:hover {
        color: var(--primary) !important;
        background: var(--bg-soft);
    }
    .navbar-nav .nav-link.active {
        color: #fff !important;
        background: var(--primary);
        box-shadow: 0 4px 12px rgba(15, 28, 46, 0.2);
    }
    .nav-cta { margin-left: 12px; padding: 9px 24px !important; font-size: 0.88rem; }
    .navbar-toggler {
        border: none;
        background: transparent;
        padding: 6px 10px;
    }
    .navbar-toggler:focus { box-shadow: none; outline: 2px solid rgba(245, 166, 35, 0.4); border-radius: 8px; }
    .navbar-toggler-icon {
        background-image: none;
        width: 28px;
        height: 28px;
        position: relative;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .navbar-toggler-icon::before {
        content: '\f0c9';
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        font-size: 1.3rem;
        color: var(--primary);
    }
    .navbar-toggler[aria-expanded="true"] .navbar-toggler-icon::before {
        content: '\f00d';
    }

    /* ============ Hero ============ */
    .hero {
        background: linear-gradient(135deg, rgba(15, 28, 46, 0.96) 0%, rgba(27, 47, 74, 0.92) 45%, rgba(15, 28, 46, 0.88) 100%),
            url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        padding: 130px 0 110px;
        color: #fff;
        position: relative;
    }
    .hero::after {
        content: '';
        position: absolute;
        bottom: -1px;
        left: 0;
        right: 0;
        height: 80px;
        background: linear-gradient(to top, var(--bg-body), transparent);
        pointer-events: none;
    }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(255, 255, 255, 0.1);
        border: 1px solid rgba(255, 255, 255, 0.18);
        border-radius: 50px;
        padding: 8px 20px;
        font-size: 0.82rem;
        font-weight: 600;
        letter-spacing: 0.5px;
        margin-bottom: 24px;
        backdrop-filter: blur(8px);
    }
    .hero-badge i { color: var(--accent); }
    .hero h1 {
        font-size: 3rem;
        font-weight: 800;
        line-height: 1.25;
        margin-bottom: 18px;
        letter-spacing: 0.5px;
    }
    .hero p.lead {
        font-size: 1.12rem;
        color: rgba(255, 255, 255, 0.85);
        max-width: 560px;
        margin-bottom: 36px;
        line-height: 1.8;
    }
    .hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
    .hero-arrow {
        position: absolute;
        bottom: 30px;
        left: 50%;
        transform: translateX(-50%);
        color: rgba(255, 255, 255, 0.4);
        font-size: 1.2rem;
        animation: bounce 2s infinite;
    }
    @keyframes bounce {
        0%, 100% { transform: translate(-50%, 0); }
        50% { transform: translate(-50%, 8px); }
    }

    /* ============ Feature / 核心优势 ============ */
    .feature-card {
        background: var(--bg-white);
        border-radius: var(--radius-lg);
        padding: 38px 28px;
        height: 100%;
        border: 1px solid var(--border-color);
        box-shadow: var(--shadow-xs);
        text-align: center;
        transition: var(--transition);
        position: relative;
        overflow: hidden;
    }
    .feature-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 3px;
        background: linear-gradient(90deg, var(--accent), var(--accent-light));
        opacity: 0;
        transition: var(--transition);
    }
    .feature-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-md);
        border-color: rgba(245, 166, 35, 0.3);
    }
    .feature-card:hover::before { opacity: 1; }
    .feature-icon {
        width: 68px;
        height: 68px;
        border-radius: 18px;
        background: linear-gradient(135deg, var(--primary), var(--primary-light));
        color: var(--accent);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.6rem;
        margin: 0 auto 20px;
        box-shadow: var(--shadow-sm);
    }
    .feature-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 12px; color: var(--primary); }
    .feature-card p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 0; }

    /* ============ Category Cards ============ */
    .cat-card {
        background: var(--bg-white);
        border-radius: var(--radius-lg);
        overflow: hidden;
        height: 100%;
        border: 1px solid var(--border-color);
        box-shadow: var(--shadow-xs);
        display: block;
        transition: var(--transition);
        position: relative;
    }
    .cat-card:hover {
        transform: translateY(-8px);
        box-shadow: var(--shadow-lg);
        border-color: rgba(245, 166, 35, 0.35);
    }
    .cat-img {
        height: 190px;
        overflow: hidden;
        position: relative;
    }
    .cat-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.5s ease;
    }
    .cat-card:hover .cat-img img { transform: scale(1.06); }
    .cat-img::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(to top, rgba(15, 28, 46, 0.55), transparent 60%);
        opacity: 0.6;
        transition: var(--transition);
    }
    .cat-card:hover .cat-img::after { opacity: 0.85; }
    .cat-tag {
        position: absolute;
        top: 14px;
        left: 14px;
        background: rgba(255, 255, 255, 0.92);
        color: var(--primary);
        font-size: 0.76rem;
        font-weight: 700;
        padding: 5px 14px;
        border-radius: 50px;
        z-index: 2;
        backdrop-filter: blur(4px);
    }
    .cat-body { padding: 24px; }
    .cat-body h3 { font-size: 1.12rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
    .cat-body p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 16px; line-height: 1.65; }
    .cat-link {
        color: var(--accent-dark);
        font-weight: 700;
        font-size: 0.88rem;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .cat-link i { transition: transform 0.3s ease; }
    .cat-card:hover .cat-link i { transform: translateX(5px); }

    /* ============ About / 平台介绍 ============ */
    .about-section {
        background: var(--bg-white);
        border-top: 1px solid var(--border-color);
        border-bottom: 1px solid var(--border-color);
    }
    .about-img {
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-lg);
        height: 100%;
        min-height: 340px;
        object-fit: cover;
    }
    .about-text h3 { font-size: 1.8rem; font-weight: 800; color: var(--primary); margin-bottom: 18px; }
    .about-text p { color: var(--text-muted); font-size: 0.98rem; line-height: 1.85; margin-bottom: 16px; }
    .about-check {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        margin-bottom: 12px;
        color: var(--text-main);
        font-size: 0.94rem;
    }
    .about-check i {
        color: var(--accent);
        margin-top: 3px;
        flex-shrink: 0;
    }

    /* ============ News Cards ============ */
    .news-card {
        background: var(--bg-white);
        border-radius: var(--radius-md);
        border: 1px solid var(--border-color);
        box-shadow: var(--shadow-xs);
        padding: 26px;
        height: 100%;
        display: flex;
        flex-direction: column;
        transition: var(--transition);
    }
    .news-card:hover {
        transform: translateY(-5px);
        box-shadow: var(--shadow-md);
        border-color: rgba(245, 166, 35, 0.35);
    }
    .news-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 14px;
    }
    .news-meta .date { font-size: 0.78rem; color: var(--text-muted); display: flex; align-items: center; gap: 5px; }
    .news-card h3 {
        font-size: 1.05rem;
        font-weight: 700;
        color: var(--primary);
        line-height: 1.45;
        margin-bottom: 10px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-card p {
        font-size: 0.88rem;
        color: var(--text-muted);
        line-height: 1.7;
        flex: 1;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 16px;
    }
    .news-read {
        color: var(--accent-dark);
        font-weight: 600;
        font-size: 0.85rem;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .news-read i { transition: transform 0.3s ease; }
    .news-card:hover .news-read i { transform: translateX(5px); }
    .empty-tip {
        background: var(--bg-white);
        border: 1px dashed var(--border-color);
        border-radius: var(--radius-md);
        padding: 48px 24px;
        text-align: center;
        color: var(--text-muted);
        font-size: 0.95rem;
    }

    /* ============ Stats ============ */
    .stats-section {
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
        color: #fff;
        position: relative;
        overflow: hidden;
    }
    .stats-section::before {
        content: '';
        position: absolute;
        top: -80px;
        right: -80px;
        width: 280px;
        height: 280px;
        border-radius: 50%;
        background: rgba(245, 166, 35, 0.08);
    }
    .stat-item {
        text-align: center;
        padding: 30px 16px;
    }
    .stat-item .stat-num {
        font-size: 2.6rem;
        font-weight: 800;
        color: var(--accent);
        line-height: 1.2;
        margin-bottom: 6px;
    }
    .stat-item .stat-label {
        font-size: 0.95rem;
        color: rgba(255, 255, 255, 0.75);
        letter-spacing: 1px;
    }
    .stat-divider {
        border-left: 1px solid rgba(255, 255, 255, 0.15);
        min-height: 80px;
    }
    @media (max-width: 767px) {
        .stat-divider { border-left: none; border-top: 1px solid rgba(255, 255, 255, 0.15); min-height: 0; }
    }

    /* ============ Steps ============ */
    .step-item {
        text-align: center;
        padding: 36px 28px;
        background: var(--bg-white);
        border-radius: var(--radius-lg);
        border: 1px solid var(--border-color);
        box-shadow: var(--shadow-xs);
        height: 100%;
        position: relative;
        transition: var(--transition);
    }
    .step-item:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
    .step-num {
        width: 54px;
        height: 54px;
        margin: 0 auto 18px;
        background: linear-gradient(135deg, var(--accent), var(--accent-dark));
        color: #fff;
        font-size: 1.1rem;
        font-weight: 800;
        border-radius: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 8px 20px rgba(245, 166, 35, 0.3);
    }
    .step-item h3 { font-size: 1.08rem; font-weight: 700; color: var(--primary); margin-bottom: 10px; }
    .step-item p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 0; }

    /* ============ FAQ ============ */
    .faq-section {
        background: var(--bg-white);
        border-top: 1px solid var(--border-color);
        border-bottom: 1px solid var(--border-color);
    }
    .faq-wrap { max-width: 860px; margin: 0 auto; }
    .accordion-item {
        border: 1px solid var(--border-color) !important;
        margin-bottom: 14px;
        border-radius: var(--radius-md) !important;
        overflow: hidden;
        box-shadow: var(--shadow-xs);
    }
    .accordion-button {
        background: var(--bg-white) !important;
        color: var(--primary) !important;
        font-weight: 600;
        font-size: 1rem;
        padding: 20px 24px;
        border: none;
        box-shadow: none !important;
        transition: var(--transition);
    }
    .accordion-button:not(.collapsed) {
        color: var(--accent-dark) !important;
        background: rgba(245, 166, 35, 0.04) !important;
    }
    .accordion-button::after {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 30px;
        height: 30px;
        background: var(--bg-soft);
        border-radius: 50%;
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        content: '+' !important;
        background-image: none !important;
        font-size: 0.85rem;
        color: var(--primary);
        transition: var(--transition);
    }
    .accordion-button:not(.collapsed)::after {
        content: '\2013' !important;
        color: var(--accent-dark);
        transform: rotate(0deg) !important;
    }
    .accordion-body {
        padding: 0 24px 22px;
        color: var(--text-muted);
        font-size: 0.93rem;
        line-height: 1.8;
        background: var(--bg-white);
    }

    /* ============ CTA ============ */
    .cta-section {
        position: relative;
        background: linear-gradient(135deg, rgba(15, 28, 46, 0.94) 0%, rgba(27, 47, 74, 0.9) 100%),
            url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
        padding: 100px 0;
        color: #fff;
        text-align: center;
    }
    .cta-section h2 {
        font-size: 2rem;
        font-weight: 800;
        margin-bottom: 14px;
        color: #fff;
    }
    .cta-section p {
        color: rgba(255, 255, 255, 0.8);
        font-size: 1.05rem;
        max-width: 640px;
        margin: 0 auto 32px;
        line-height: 1.75;
    }
    .cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

    /* ============ Footer ============ */
    .site-footer {
        background: var(--primary-dark);
        color: rgba(255, 255, 255, 0.75);
        padding: 64px 0 30px;
    }
    .site-footer h5 {
        color: #fff;
        font-size: 1.05rem;
        font-weight: 700;
        margin-bottom: 20px;
        letter-spacing: 0.5px;
    }
    .site-footer .footer-brand {
        font-size: 1.15rem;
        font-weight: 800;
        color: #fff;
        margin-bottom: 14px;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .site-footer .footer-brand i { color: var(--accent); }
    .site-footer p.footer-desc { font-size: 0.88rem; line-height: 1.75; max-width: 320px; color: rgba(255, 255, 255, 0.6); }
    .site-footer ul li { margin-bottom: 10px; font-size: 0.9rem; }
    .site-footer ul li a {
        color: rgba(255, 255, 255, 0.65);
        display: inline-flex;
        align-items: center;
        gap: 8px;
        transition: var(--transition);
    }
    .site-footer ul li a:hover { color: var(--accent); padding-left: 4px; }
    .site-footer ul li a i { font-size: 0.7rem; color: var(--accent); }
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding-top: 24px;
        margin-top: 44px;
        text-align: center;
        font-size: 0.82rem;
        color: rgba(255, 255, 255, 0.4);
    }

    /* ============ Responsive ============ */
    @media (max-width: 1024px) {
        .section { padding: 70px 0; }
        .hero { padding: 110px 0 90px; }
        .hero h1 { font-size: 2.5rem; }
        .section-head h2 { font-size: 1.8rem; }
    }
    @media (max-width: 767px) {
        .section { padding: 56px 0; }
        .hero { padding: 90px 0 70px; }
        .hero h1 { font-size: 2rem; }
        .hero p.lead { font-size: 1rem; }
        .section-head { margin-bottom: 34px; }
        .section-head h2 { font-size: 1.55rem; }
        .navbar-brand { font-size: 1.05rem; }
        .navbar-brand .brand-icon { width: 34px; height: 34px; font-size: 1rem; }
        .navbar-nav { padding: 14px 0 6px; }
        .navbar-nav .nav-link { padding: 10px 20px !important; margin: 3px 0; }
        .nav-cta { margin-left: 0; margin-top: 8px; width: 100%; justify-content: center; }
        .hero-btns { flex-direction: column; }
        .hero-btns .btn-accent, .hero-btns .btn-outline-light-custom { width: 100%; justify-content: center; }
        .stat-item .stat-num { font-size: 2rem; }
        .cta-section { padding: 70px 0; }
        .cta-section h2 { font-size: 1.6rem; }
    }
    @media (max-width: 520px) {
        .hero h1 { font-size: 1.7rem; }
        .hero-badge { font-size: 0.75rem; padding: 6px 14px; }
        .section-head h2 { font-size: 1.35rem; }
        .feature-card { padding: 28px 20px; }
        .cat-body { padding: 18px; }
        .news-card { padding: 20px; }
        .stat-item { padding: 20px 10px; }
        .step-item { padding: 26px 18px; }
        .accordion-button { font-size: 0.92rem; padding: 16px 18px; }
        .accordion-body { padding: 0 18px 18px; }
    }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6d5ef3;
            --primary-light: #8b7dff;
            --primary-dark: #4a3fc9;
            --accent: #00e0c6;
            --accent-soft: rgba(0, 224, 198, 0.15);
            --gold: #ffc94d;
            --bg-default: #0b101d;
            --bg-card: #121a2c;
            --bg-card-light: #182234;
            --bg-section-alt: #0e1524;
            --text-strong: #eef2f8;
            --text-body: #aeb9cd;
            --text-muted: #6e7b96;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-strong: rgba(255, 255, 255, 0.16);
            --radius-xl: 24px;
            --radius-lg: 18px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-lift: 0 18px 50px rgba(0, 0, 0, 0.5);
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 40px rgba(109, 94, 243, 0.25);
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            --font-main: "Inter", "PingFang SC", "Microsoft YaHei", "Segoe UI", -apple-system, BlinkMacSystemFont, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-main);
            font-size: 1rem;
            line-height: 1.7;
            background-color: var(--bg-default);
            color: var(--text-body);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

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

        ul,
        ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin: 0 0 0.6em;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-strong);
            letter-spacing: -0.01em;
        }

        p {
            margin-bottom: 1rem;
        }

        .container {
            max-width: 1200px;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 96px 0;
            position: relative;
        }

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

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            background: var(--accent-soft);
            border: 1px solid rgba(0, 224, 198, 0.2);
            padding: 6px 16px;
            border-radius: 40px;
            margin-bottom: 18px;
        }

        .section-title {
            font-size: clamp(1.9rem, 4vw, 2.6rem);
            margin-bottom: 14px;
        }

        .section-desc {
            font-size: 1.08rem;
            color: var(--text-body);
            max-width: 680px;
            margin-bottom: 0;
        }

        .section-head {
            margin-bottom: 56px;
        }

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

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(11, 16, 29, 0.86);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .site-header .navbar {
            padding: 14px 0;
        }

        .site-header .navbar-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 800;
            color: var(--text-strong);
            letter-spacing: 0.02em;
            transition: color var(--transition-fast);
        }

        .site-header .navbar-brand:hover {
            color: var(--accent);
        }

        .site-header .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            border-radius: 12px;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: 0 4px 16px rgba(109, 94, 243, 0.4);
        }

        .site-header .navbar-nav {
            gap: 4px;
        }

        .site-header .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            padding: 8px 16px;
            border-radius: 40px;
            transition: all var(--transition-fast);
            position: relative;
        }

        .site-header .nav-link:hover {
            color: var(--text-strong);
            background: rgba(255, 255, 255, 0.05);
        }

        .site-header .nav-link.active {
            color: #fff;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            box-shadow: 0 4px 18px rgba(109, 94, 243, 0.35);
        }

        .site-header .nav-cta {
            padding: 9px 22px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.92rem;
            white-space: nowrap;
        }

        .site-header .navbar-toggler {
            border: 1px solid var(--border-strong);
            padding: 6px 10px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.04);
        }

        .site-header .navbar-toggler:focus {
            box-shadow: 0 0 0 0.2rem rgba(109, 94, 243, 0.25);
        }

        .site-header .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23aeb9cd' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ===== 页面横幅 Hero ===== */
        .page-hero {
            position: relative;
            padding: 120px 0 110px;
            background: linear-gradient(135deg, rgba(11, 16, 29, 0.92) 0%, rgba(30, 22, 64, 0.82) 100%), url("/assets/images/backpic/back-1.png") center center / cover no-repeat;
            border-bottom: 1px solid var(--border-subtle);
            overflow: hidden;
        }

        .page-hero::after {
            content: "";
            position: absolute;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(109, 94, 243, 0.18) 0%, transparent 70%);
            top: -140px;
            right: -80px;
            pointer-events: none;
        }

        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid var(--border-strong);
            color: var(--text-strong);
            padding: 7px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 26px;
            backdrop-filter: blur(8px);
        }

        .page-hero .hero-badge i {
            color: var(--accent);
        }

        .page-hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            max-width: 700px;
        }

        .page-hero h1 span {
            background: linear-gradient(90deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .page-hero .hero-sub {
            font-size: 1.15rem;
            color: var(--text-body);
            max-width: 620px;
            margin-bottom: 34px;
        }

        .page-hero .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 48px;
        }

        .page-hero .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 38px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
        }

        .hero-stat .stat-num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-strong);
            line-height: 1.2;
        }

        .hero-stat .stat-num i {
            color: var(--accent);
            font-size: 1.2rem;
            margin-left: 4px;
        }

        .hero-stat .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* ===== 按钮 ===== */
        .btn {
            border-radius: 40px;
            padding: 10px 26px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border: none;
            box-shadow: 0 6px 20px rgba(109, 94, 243, 0.4);
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary) 100%);
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(109, 94, 243, 0.5);
        }

        .btn-outline-light {
            border: 1px solid var(--border-strong);
            color: var(--text-strong);
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(6px);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.3);
            transform: translateY(-2px);
        }

        .btn-accent {
            background: linear-gradient(135deg, var(--accent) 0%, #00b8a5 100%);
            color: #08131c;
            border: none;
            box-shadow: 0 6px 20px rgba(0, 224, 198, 0.3);
        }

        .btn-accent:hover {
            background: linear-gradient(135deg, #0ff2d6 0%, var(--accent) 100%);
            color: #08131c;
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(0, 224, 198, 0.4);
        }

        .btn-lg {
            padding: 14px 36px;
            font-size: 1.05rem;
        }

        /* ===== 优势卡片 ===== */
        .adv-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }

        .adv-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 42px 32px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .adv-card::before {
            content: "";
            position: absolute;
            inset: 0 0 auto 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity var(--transition-smooth);
        }

        .adv-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-card);
            border-color: var(--border-strong);
            background: var(--bg-card-light);
        }

        .adv-card:hover::before {
            opacity: 1;
        }

        .adv-icon {
            width: 58px;
            height: 58px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 16px;
            font-size: 1.5rem;
            margin-bottom: 24px;
            background: var(--accent-soft);
            color: var(--accent);
            border: 1px solid rgba(0, 224, 198, 0.2);
        }

        .adv-card:nth-child(2) .adv-icon {
            background: rgba(109, 94, 243, 0.15);
            color: var(--primary-light);
            border-color: rgba(109, 94, 243, 0.25);
        }

        .adv-card:nth-child(3) .adv-icon {
            background: rgba(255, 201, 77, 0.15);
            color: var(--gold);
            border-color: rgba(255, 201, 77, 0.25);
        }

        .adv-card h3 {
            font-size: 1.2rem;
            margin-bottom: 12px;
        }

        .adv-card p {
            margin-bottom: 0;
            font-size: 0.95rem;
            color: var(--text-body);
        }

        /* ===== 注册流程 ===== */
        .steps-section {
            background: var(--bg-section-alt);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            position: relative;
        }

        .steps-grid::before {
            content: "";
            position: absolute;
            top: 68px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: linear-gradient(90deg, transparent, rgba(109, 94, 243, 0.5), rgba(0, 224, 198, 0.5), transparent);
            z-index: 0;
        }

        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            text-align: center;
            position: relative;
            z-index: 1;
            transition: all var(--transition-smooth);
        }

        .step-card:hover {
            border-color: var(--border-strong);
            box-shadow: var(--shadow-card);
            transform: translateY(-6px);
            background: var(--bg-card-light);
        }

        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .step-icon {
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            border-radius: 50%;
            background: rgba(109, 94, 243, 0.12);
            border: 1px solid rgba(109, 94, 243, 0.2);
            color: var(--primary-light);
            font-size: 1.4rem;
            transition: all var(--transition-smooth);
        }

        .step-card:hover .step-icon {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 0 24px rgba(109, 94, 243, 0.4);
        }

        .step-card h3 {
            font-size: 1rem;
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: 0.87rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ===== 注册准备 ===== */
        .prep-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .prep-visual {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            min-height: 380px;
            background: url("/assets/images/backpic/back-2.png") center center / cover no-repeat;
            display: flex;
            align-items: flex-end;
            box-shadow: var(--shadow-lift);
        }

        .prep-visual::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(11, 16, 29, 0.85) 100%);
        }

        .prep-visual .prep-quote {
            position: relative;
            padding: 28px;
            color: #fff;
        }

        .prep-visual .prep-quote i {
            color: var(--accent);
            margin-right: 6px;
        }

        .prep-visual .prep-quote strong {
            display: block;
            font-size: 1.15rem;
            margin-bottom: 4px;
        }

        .prep-visual .prep-quote span {
            font-size: 0.9rem;
            opacity: 0.85;
        }

        .prep-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .prep-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            transition: all var(--transition-fast);
        }

        .prep-item:hover {
            border-color: rgba(109, 94, 243, 0.35);
            background: var(--bg-card-light);
            transform: translateX(4px);
        }

        .prep-item .prep-icon {
            flex-shrink: 0;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            background: var(--accent-soft);
            color: var(--accent);
        }

        .prep-item:nth-child(2) .prep-icon {
            background: rgba(109, 94, 243, 0.15);
            color: var(--primary-light);
        }

        .prep-item:nth-child(3) .prep-icon {
            background: rgba(255, 201, 77, 0.15);
            color: var(--gold);
        }

        .prep-item:nth-child(4) .prep-icon {
            background: rgba(0, 224, 198, 0.12);
            color: var(--accent);
        }

        .prep-item h4 {
            font-size: 1.05rem;
            margin-bottom: 4px;
        }

        .prep-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== 注册方式卡片 ===== */
        .channel-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }

        .channel-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
        }

        .channel-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-card);
            border-color: var(--border-strong);
        }

        .channel-card .channel-img {
            height: 180px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .channel-card .channel-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 45%, rgba(11, 16, 29, 0.75) 100%);
        }

        .channel-card .channel-img .channel-type {
            position: absolute;
            bottom: 16px;
            left: 20px;
            z-index: 2;
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .channel-card .channel-img .channel-type i {
            color: var(--accent);
        }

        .channel-card .channel-body {
            padding: 24px 24px 28px;
        }

        .channel-card .channel-body p {
            font-size: 0.92rem;
            color: var(--text-body);
            margin-bottom: 18px;
        }

        .channel-card .channel-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            font-size: 0.92rem;
            color: var(--primary-light);
            transition: gap var(--transition-fast);
        }

        .channel-card .channel-link:hover {
            gap: 14px;
            color: var(--accent);
        }

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

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

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--border-strong);
        }

        .faq-item details {
            padding: 0;
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-strong);
            list-style: none;
            transition: background var(--transition-fast);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: "\f078";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: transform var(--transition-smooth);
            flex-shrink: 0;
        }

        .faq-item details[open] summary {
            background: rgba(109, 94, 243, 0.06);
        }

        .faq-item details[open] summary::after {
            transform: rotate(180deg);
            color: var(--accent);
        }

        .faq-item .faq-answer {
            padding: 4px 24px 22px;
            font-size: 0.95rem;
            color: var(--text-body);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            margin-top: 0;
        }

        .faq-item .faq-answer p {
            margin-bottom: 0;
            padding-top: 14px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 100px 0;
            position: relative;
            background: url("/assets/images/backpic/back-3.png") center center / cover no-repeat;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 16, 29, 0.95) 20%, rgba(74, 63, 201, 0.65) 100%);
        }

        .cta-box {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }

        .cta-box .cta-icon {
            width: 68px;
            height: 68px;
            margin: 0 auto 24px;
            background: var(--accent-soft);
            border: 1px solid rgba(0, 224, 198, 0.3);
            border-radius: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--accent);
        }

        .cta-box h2 {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            margin-bottom: 16px;
            color: #fff;
        }

        .cta-box p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 32px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #080d17;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 72px;
            font-size: 0.95rem;
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-strong);
            margin-bottom: 16px;
        }

        .site-footer .footer-brand i {
            color: var(--primary-light);
        }

        .site-footer .footer-desc {
            color: var(--text-muted);
            margin-bottom: 20px;
            max-width: 360px;
        }

        .site-footer h5 {
            font-size: 1rem;
            margin-bottom: 18px;
            color: var(--text-strong);
        }

        .site-footer ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

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

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

        .site-footer ul li a:hover {
            color: var(--accent);
        }

        .site-footer ul li a:hover i {
            transform: translateX(4px);
            color: var(--accent);
        }

        .site-footer ul li {
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .site-footer ul li i {
            color: var(--text-muted);
            width: 16px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 22px 0;
            margin-top: 20px;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.88rem;
        }

        .footer-bottom p {
            margin-bottom: 0;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .section {
                padding: 76px 0;
            }

            .adv-grid,
            .channel-grid {
                grid-template-columns: repeat(3, 1fr);
            }

            .steps-grid {
                grid-template-columns: repeat(5, 1fr);
                gap: 14px;
            }

            .steps-grid::before {
                top: 60px;
            }

            .step-card {
                padding: 22px 14px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 64px 0;
            }

            .site-header .navbar-collapse {
                background: rgba(11, 16, 29, 0.98);
                border-radius: 16px;
                padding: 18px;
                margin-top: 12px;
                border: 1px solid var(--border-subtle);
                box-shadow: var(--shadow-lift);
            }

            .site-header .navbar-nav {
                gap: 6px;
                margin-bottom: 14px;
            }

            .site-header .nav-link {
                padding: 10px 16px;
            }

            .site-header .nav-cta {
                width: 100%;
                justify-content: center;
            }

            .page-hero {
                padding: 90px 0 80px;
            }

            .page-hero .hero-stats {
                gap: 24px;
            }

            .adv-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }

            .steps-grid::before {
                display: none;
            }

            .step-card {
                padding: 26px 22px;
                text-align: left;
                display: flex;
                align-items: flex-start;
                gap: 20px;
                flex-wrap: wrap;
            }

            .step-card .step-icon {
                margin: 0;
            }

            .step-card .step-num {
                position: absolute;
                right: 20px;
                top: 20px;
                margin: 0;
            }

            .step-card .step-body {
                flex: 1;
                min-width: 180px;
            }

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

            .prep-visual {
                min-height: 300px;
            }

            .channel-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .faq-item summary {
                padding: 18px 20px;
                font-size: 0.95rem;
            }

            .faq-item .faq-answer {
                padding: 4px 20px 18px;
            }

            .cta-section {
                padding: 72px 0;
            }
        }

        @media (max-width: 520px) {
            .section {
                padding: 54px 0;
            }

            .page-hero {
                padding: 70px 0 60px;
            }

            .page-hero .hero-actions {
                flex-direction: column;
                gap: 12px;
            }

            .page-hero .hero-actions .btn {
                width: 100%;
            }

            .page-hero .hero-stats {
                gap: 18px;
                flex-direction: column;
            }

            .adv-card {
                padding: 28px 22px;
            }

            .prep-item {
                padding: 16px;
                flex-direction: column;
            }

            .prep-item .prep-icon {
                width: 38px;
                height: 38px;
                font-size: 1rem;
            }

            .faq-item summary {
                font-size: 0.9rem;
                padding: 16px;
            }

            .faq-item summary::after {
                font-size: 0.75rem;
            }

            .site-footer {
                padding-top: 48px;
            }

            .site-footer .row {
                gap: 24px;
            }
        }

        /* 移动端导航展开动画 */
        @media (max-width: 991.98px) {
            .navbar-collapse {
                transition: all 0.3s ease;
            }
        }

/* roulang page: article */
:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #818cf8;
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --dark: #0f172a;
    --dark-2: #1e293b;
    --bg: #f8fafc;
    --white: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
button, input, select, textarea { font-family: inherit; }

.container { padding-left: 1rem; padding-right: 1rem; }

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 12px rgba(15, 23, 42, 0.04);
}

.navbar { padding: 0.7rem 0; }

.navbar-brand {
    font-weight: 800;
    font-size: 1.3rem;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 0.55rem;
    white-space: nowrap;
}

.navbar-brand:hover { color: var(--primary); }

.brand-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.05rem;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.32);
    flex-shrink: 0;
}

.navbar-nav { gap: 0.15rem; }

.nav-link {
    color: var(--text);
    font-weight: 500;
    padding: 0.5rem 1.05rem !important;
    border-radius: 10px;
    margin: 0 0.1rem;
    font-size: 0.95rem;
}

.nav-link:hover { color: var(--primary); background: rgba(79, 70, 229, 0.07); }

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

.nav-cta {
    border-radius: 12px;
    padding: 0.55rem 1.4rem !important;
    font-weight: 600;
    font-size: 0.92rem;
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.25);
    transition: var(--transition);
}

.nav-cta:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(79, 70, 229, 0.35);
}

.navbar-toggler {
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.35rem 0.6rem;
}

.navbar-toggler:focus { box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15); }

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%234f46e5' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

@media (max-width: 991.98px) {
    .navbar-collapse {
        padding: 1rem 0;
        background: var(--white);
        border-radius: 16px;
        margin-top: 0.5rem;
    }
    .navbar-nav { align-items: flex-start; width: 100%; }
    .nav-link { width: 100%; border-radius: 10px; }
    .nav-cta { width: 100%; margin-top: 0.7rem; text-align: center; }
}

/* Article Banner */
.article-banner {
    position: relative;
    padding: 4.5rem 0 4rem;
    overflow: hidden;
    background: var(--dark);
}

.banner-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    z-index: 0;
}

.banner-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(15, 23, 42, 0.82) 55%, rgba(79, 70, 229, 0.55) 100%);
}

.article-banner-inner {
    position: relative;
    z-index: 2;
    max-width: 920px;
    margin: 0 auto;
    text-align: center;
    color: #fff;
}

.badge-category {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(255, 255, 255, 0.14);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: #fff;
    padding: 0.35rem 1.1rem;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    border: 1px solid rgba(255, 255, 255, 0.22);
    letter-spacing: 0.04em;
    margin-bottom: 1.2rem;
}

.badge-category i { font-size: 0.75rem; }

.article-banner h1 {
    font-size: clamp(1.7rem, 4vw, 2.7rem);
    font-weight: 800;
    line-height: 1.35;
    margin-bottom: 1.2rem;
    text-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
    letter-spacing: 0.01em;
}

.article-meta {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.92rem;
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

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

/* Breadcrumb */
.breadcrumb-wrap {
    padding: 0.9rem 0;
    background: var(--white);
    border-bottom: 1px solid var(--border);
}

.breadcrumb { margin: 0; font-size: 0.9rem; }

.breadcrumb-item a { color: var(--primary); font-weight: 500; }
.breadcrumb-item a:hover { color: var(--primary-dark); text-decoration: underline; text-underline-offset: 3px; }
.breadcrumb-item.active { color: var(--text-muted); }

.breadcrumb-item + .breadcrumb-item::before { color: var(--border); }

/* Article Main */
.article-section { padding: 3rem 0 4rem; }

.article-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    padding: 2.5rem;
    box-shadow: var(--shadow-sm);
}

.article-content {
    font-size: 1.05rem;
    line-height: 1.9;
    color: #334155;
    word-wrap: break-word;
}

.article-content p { margin: 0 0 1.4rem; }

.article-content h2 {
    font-size: 1.55rem;
    font-weight: 700;
    color: var(--dark);
    margin: 2.2rem 0 1rem;
    padding-bottom: 0.6rem;
    border-bottom: 2px solid var(--border);
}

.article-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark);
    margin: 1.8rem 0 0.8rem;
}

.article-content ul,
.article-content ol {
    margin: 0 0 1.5rem;
    padding-left: 1.5rem;
}

.article-content li { margin-bottom: 0.45rem; }

.article-content img {
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin: 1.5rem 0;
}

.article-content blockquote {
    border-left: 4px solid var(--primary);
    background: rgba(79, 70, 229, 0.06);
    padding: 1rem 1.5rem;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin: 1.5rem 0;
    font-style: italic;
    color: var(--text-muted);
}

.article-content a {
    color: var(--primary);
    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 4px;
}

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

.article-tags {
    margin-top: 2.2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 100px;
    padding: 0.35rem 0.9rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: var(--transition);
}

.tag:hover {
    background: rgba(79, 70, 229, 0.06);
    border-color: var(--primary-light);
    color: var(--primary);
}

/* Not Found */
.not-found {
    text-align: center;
    padding: 3.5rem 1.5rem;
}

.not-found-icon {
    width: 88px;
    height: 88px;
    background: rgba(79, 70, 229, 0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2.2rem;
    color: var(--primary);
}

.not-found h2 {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 0.8rem;
}

.not-found p { color: var(--text-muted); margin-bottom: 1.8rem; }

.not-found .btn {
    border-radius: 12px;
    padding: 0.65rem 1.8rem;
    font-weight: 600;
    background: var(--primary);
    border-color: var(--primary);
}

.not-found .btn:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(79, 70, 229, 0.3);
}

/* Sidebar */
.sidebar-card {
    background: var(--white);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 1.6rem 1.8rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.sidebar-card:hover { box-shadow: var(--shadow); }

.sidebar-card h5 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

.sidebar-card h5 i { color: var(--primary); }

.sidebar-card p { color: var(--text-muted); font-size: 0.92rem; line-height: 1.7; margin-bottom: 1rem; }

.platform-card .platform-img {
    width: 100%;
    height: 160px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    margin-bottom: 1.2rem;
    box-shadow: var(--shadow-sm);
}

.platform-card .btn-platform {
    width: 100%;
    border-radius: 12px;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border: none;
    padding: 0.75rem 0;
    color: #fff;
    font-size: 0.95rem;
    box-shadow: 0 6px 18px rgba(79, 70, 229, 0.3);
    transition: var(--transition);
}

.platform-card .btn-platform:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(79, 70, 229, 0.4);
    color: #fff;
}

.info-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.info-list li {
    display: flex;
    gap: 0.6rem;
    padding: 0.5rem 0;
    border-bottom: 1px dashed var(--border);
    font-size: 0.9rem;
    color: var(--text-muted);
}

.info-list li:last-child { border-bottom: none; }

.info-list li i {
    color: var(--primary);
    width: 18px;
    text-align: center;
    margin-top: 0.25rem;
    flex-shrink: 0;
}

.sidebar-nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-nav-list a {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.55rem 0.6rem;
    border-radius: 10px;
    color: var(--text);
    font-weight: 500;
    font-size: 0.92rem;
    transition: var(--transition);
}

.sidebar-nav-list a:hover {
    background: rgba(79, 70, 229, 0.06);
    color: var(--primary);
    padding-left: 0.95rem;
}

.sidebar-nav-list a i { color: var(--primary-light); font-size: 0.75rem; }

/* Category Cards */
.category-cards { padding: 4rem 0; background: var(--white); border-top: 1px solid var(--border); }

.section-head { text-align: center; margin-bottom: 2.5rem; }

.section-head h2 {
    font-size: clamp(1.6rem, 3vw, 2.1rem);
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 0.6rem;
}

.section-head p { color: var(--text-muted); font-size: 1rem; margin: 0; }

.section-head .section-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(79, 70, 229, 0.08);
    color: var(--primary);
    font-size: 0.82rem;
    font-weight: 600;
    padding: 0.3rem 1rem;
    border-radius: 100px;
    margin-bottom: 0.9rem;
}

.category-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.category-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.category-card .card-img {
    height: 160px;
    overflow: hidden;
    position: relative;
}

.category-card .card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.category-card .card-body {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.category-card .card-body h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.6rem;
}

.category-card .card-body p {
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.7;
    flex: 1;
    margin-bottom: 1rem;
}

.card-link {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: var(--transition);
}

.card-link:hover { color: var(--primary-dark); gap: 0.7rem; }

/* Stats Strip */
.stats-strip {
    background: linear-gradient(135deg, var(--dark) 0%, #1e1b4b 100%);
    padding: 3.2rem 0;
    position: relative;
    overflow: hidden;
}

.stats-strip::before {
    content: '';
    position: absolute;
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.25) 0%, transparent 70%);
    top: -120px;
    right: -80px;
    border-radius: 50%;
}

.stats-strip::after {
    content: '';
    position: absolute;
    width: 360px;
    height: 360px;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.16) 0%, transparent 70%);
    bottom: -120px;
    left: -60px;
    border-radius: 50%;
}

.stat-item {
    text-align: center;
    color: #fff;
    padding: 1rem;
    position: relative;
    z-index: 1;
}

.stat-item .stat-num {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1.2;
}

.stat-item .stat-label {
    color: rgba(255, 255, 255, 0.72);
    font-size: 0.92rem;
    margin-top: 0.3rem;
    letter-spacing: 0.03em;
}

/* FAQ */
.faq-section { padding: 4rem 0; }

.faq-item {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.6rem 1.8rem;
    margin-bottom: 1rem;
    transition: var(--transition);
}

.faq-item:hover {
    box-shadow: var(--shadow);
    border-color: var(--primary-light);
    transform: translateY(-2px);
}

.faq-item h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.6rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.faq-item h4 i { color: var(--primary); font-size: 0.85rem; }

.faq-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.75;
    margin: 0;
}

/* CTA */
.cta-section { padding: 3.5rem 0 4.5rem; background: var(--white); }

.cta-box {
    background: linear-gradient(135deg, var(--primary) 0%, #7c3aed 100%);
    border-radius: var(--radius-lg);
    padding: 3.5rem 2.5rem;
    text-align: center;
    color: #fff;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.cta-box::before {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    top: -100px;
    right: -80px;
}

.cta-box::after {
    content: '';
    position: absolute;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.12);
    bottom: -90px;
    left: -60px;
}

.cta-box h2 {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    margin-bottom: 0.8rem;
    position: relative;
    z-index: 1;
}

.cta-box p {
    color: rgba(255, 255, 255, 0.86);
    font-size: 1.05rem;
    margin-bottom: 1.8rem;
    position: relative;
    z-index: 1;
}

.cta-box .btn {
    border-radius: 100px;
    padding: 0.8rem 2.4rem;
    font-weight: 600;
    background: #fff;
    color: var(--primary);
    border: none;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.14);
    position: relative;
    z-index: 1;
    transition: var(--transition);
}

.cta-box .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 36px rgba(0, 0, 0, 0.2);
    background: var(--accent-light);
    color: var(--dark);
}

/* Footer */
.site-footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 4rem 0 1.8rem;
}

.footer-brand {
    font-size: 1.3rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.55rem;
}

.footer-brand i {
    color: var(--accent);
    font-size: 1.1rem;
}

.footer-desc {
    font-size: 0.92rem;
    line-height: 1.75;
    margin-bottom: 1rem;
    color: rgba(255, 255, 255, 0.6);
}

.site-footer h5 {
    color: #fff;
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.1rem;
    letter-spacing: 0.03em;
}

.site-footer ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.site-footer ul li { margin-bottom: 0.6rem; display: flex; align-items: center; gap: 0.4rem; }

.site-footer ul a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.92rem;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: var(--transition);
}

.site-footer ul a:hover {
    color: var(--accent);
    padding-left: 0.3rem;
}

.site-footer ul i {
    font-size: 0.7rem;
    color: var(--accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    margin-top: 2.5rem;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.45);
}

/* Responsive */
@media (max-width: 991.98px) {
    .article-section { padding: 2.5rem 0; }
    .category-cards, .faq-section { padding: 3rem 0; }
    .cta-section { padding: 2.5rem 0 3.5rem; }
    .article-card { padding: 2rem; }
}

@media (max-width: 767.98px) {
    body { font-size: 0.95rem; }
    .article-banner { padding: 3.2rem 0 2.8rem; }
    .article-banner h1 { font-size: 1.6rem; }
    .article-meta { gap: 0.8rem; font-size: 0.86rem; }
    .article-section { padding: 2rem 0 3rem; }
    .article-card { padding: 1.5rem; }
    .article-content { font-size: 1rem; line-height: 1.8; }
    .category-cards { padding: 2.5rem 0; }
    .faq-section { padding: 2.5rem 0; }
    .cta-box { padding: 2.5rem 1.5rem; }
    .stats-strip { padding: 2.5rem 0; }
    .stat-item .stat-num { font-size: 2rem; }
    .site-footer { padding: 3rem 0 1.5rem; }
}

@media (max-width: 520px) {
    .article-card { padding: 1.2rem; }
    .article-content img { border-radius: 12px; }
    .article-meta { flex-direction: column; gap: 0.4rem; align-items: center; }
    .article-tags { gap: 0.4rem; }
    .tag { font-size: 0.8rem; }
    .sidebar-card { padding: 1.3rem; }
    .platform-card .platform-img { height: 140px; }
    .stat-item .stat-num { font-size: 1.6rem; }
    .faq-item { padding: 1.2rem; }
    .cta-box h2 { font-size: 1.4rem; }
    .footer-bottom { font-size: 0.8rem; }
}

/* roulang page: category2 */
:root {
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --primary-light: #eef2ff;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --dark-bg: #0f172a;
  --dark-card: #1e293b;
  --bg-light: #f8fafc;
  --bg-white: #ffffff;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 6px 20px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
  --font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font-family);
  color: var(--text-main);
  background: var(--bg-light);
  line-height: 1.7;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: all .25s ease; }
img { max-width: 100%; height: auto; }
button, input { font-family: inherit; }
ul { padding-left: 0; list-style: none; margin-bottom: 0; }

.container { max-width: 1200px; }

/* ===== Header & Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1050;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(15,23,42,.04);
}
.site-header .navbar { padding: 14px 0; }
.site-header .navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
}
.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), #8b5cf6);
  color: #fff;
  font-size: 1.15rem;
  box-shadow: 0 4px 14px rgba(79,70,229,.3);
}
.site-header .navbar-nav { gap: 4px; }
.site-header .nav-link {
  font-weight: 600;
  font-size: .95rem;
  padding: 9px 18px !important;
  border-radius: 10px;
  color: var(--text-muted);
  position: relative;
  transition: all .25s ease;
}
.site-header .nav-link:hover { color: var(--primary); background: var(--primary-light); }
.site-header .nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 700;
}
.site-header .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  border-radius: 3px;
  background: var(--primary);
}
.nav-cta {
  padding: 10px 24px !important;
  border-radius: 12px !important;
  font-weight: 700 !important;
  font-size: .92rem !important;
  background: linear-gradient(135deg, var(--primary), #7c3aed) !important;
  border: none !important;
  box-shadow: 0 4px 16px rgba(79,70,229,.3) !important;
  transition: all .3s ease !important;
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(79,70,229,.4) !important;
}
.navbar-toggler { border: none; background: var(--primary-light); border-radius: 10px; padding: 8px 12px; }
.navbar-toggler:focus { box-shadow: 0 0 0 3px rgba(79,70,229,.2); }
.navbar-toggler-icon { background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%234f46e5' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important; }

/* ===== Page Banner ===== */
.page-banner {
  position: relative;
  padding: 110px 0 80px;
  background: linear-gradient(135deg, rgba(15,23,42,.88), rgba(79,70,229,.75)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color: #fff;
  overflow: hidden;
}
.page-banner::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -40px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(245,158,11,.18);
  filter: blur(60px);
}
.page-banner .banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 100px;
  padding: 7px 18px;
  font-size: .88rem;
  font-weight: 600;
  backdrop-filter: blur(4px);
  margin-bottom: 20px;
}
.page-banner h1 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.2;
  max-width: 700px;
  margin-bottom: 18px;
}
.page-banner p {
  font-size: 1.08rem;
  color: rgba(255,255,255,.85);
  max-width: 640px;
  margin-bottom: 30px;
  line-height: 1.8;
}
.banner-stats {
  display: flex;
  gap: 36px;
  flex-wrap: wrap;
  margin-top: 10px;
}
.banner-stats .stat-item {
  padding-right: 30px;
}
.banner-stats .stat-number {
  font-size: 1.7rem;
  font-weight: 800;
  color: #fff;
}
.banner-stats .stat-label {
  font-size: .88rem;
  color: rgba(255,255,255,.7);
  margin-top: 2px;
}

.breadcrumb-bar {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
  font-size: .88rem;
}
.breadcrumb-bar a:hover { color: var(--primary); }

/* ===== Section ===== */
.section {
  padding: 80px 0;
}
.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 50px;
}
.section-head .sub-title {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
  font-size: .82rem;
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 14px;
  letter-spacing: .04em;
}
.section-head h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}
.section-head p {
  color: var(--text-muted);
  font-size: 1.02rem;
}

/* ===== Cards ===== */
.custom-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all .35s ease;
  height: 100%;
}
.custom-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(79,70,229,.2);
}
.custom-card .card-cover {
  position: relative;
  height: 200px;
  overflow: hidden;
}
.custom-card .card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.custom-card:hover .card-cover img { transform: scale(1.06); }
.custom-card .card-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(255,255,255,.92);
  color: var(--primary);
  font-size: .78rem;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 100px;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(4px);
}
.custom-card .card-body {
  padding: 24px;
}
.custom-card .card-body h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.custom-card .card-body h3 a:hover { color: var(--primary); }
.custom-card .card-body p {
  color: var(--text-muted);
  font-size: .93rem;
  line-height: 1.7;
  margin-bottom: 14px;
}
.card-meta {
  display: flex;
  gap: 14px;
  font-size: .82rem;
  color: var(--text-light);
  padding-top: 12px;
  border-top: 1px solid var(--border);
}
.card-meta i { color: var(--primary); margin-right: 4px; }

/* ===== Game Category ===== */
.category-tabs {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 42px;
}
.category-tab {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 10px 22px;
  border-radius: 100px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-weight: 600;
  font-size: .92rem;
  cursor: pointer;
  transition: all .3s ease;
}
.category-tab:hover, .category-tab.active {
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: #fff;
  border-color: transparent;
  box-shadow: 0 6px 20px rgba(79,70,229,.3);
}

/* ===== Guide Steps ===== */
.steps-wrapper {
  background: var(--dark-bg);
  border-radius: var(--radius-lg);
  padding: 50px;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.steps-wrapper::before {
  content: '\f11b';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  right: 20px;
  top: -20px;
  font-size: 200px;
  opacity: .05;
  color: #fff;
}
.step-item {
  position: relative;
  padding: 20px 0;
  padding-left: 70px;
}
.step-item .step-num {
  position: absolute;
  left: 0;
  top: 20px;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), #fbbf24);
  color: #0f172a;
  font-weight: 800;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(245,158,11,.3);
}
.step-item h4 { font-weight: 700; margin-bottom: 6px; font-size: 1.1rem; }
.step-item p { color: rgba(255,255,255,.7); font-size: .93rem; margin-bottom: 0; }

/* ===== Stats Section ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 32px 20px;
  text-align: center;
  transition: all .35s ease;
}
.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}
.stat-card .stat-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.stat-card .stat-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
}
.stat-card .stat-text {
  color: var(--text-muted);
  font-size: .9rem;
  margin-top: 4px;
}

/* ===== Feature list ===== */
.feature-row {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.feature-row .feature-img {
  min-height: 340px;
  background-size: cover;
  background-position: center;
}
.feature-content { padding: 40px; }
.feature-content h3 { font-weight: 800; font-size: 1.4rem; margin-bottom: 14px; }
.check-list li {
  padding: 10px 0;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-main);
  font-size: .97rem;
}
.check-list li i {
  color: var(--primary);
  background: var(--primary-light);
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .75rem;
  margin-top: 2px;
  flex-shrink: 0;
}

/* ===== FAQ ===== */
.faq-wrapper {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  transition: all .3s ease;
}
.faq-item:hover { border-color: rgba(79,70,229,.3); box-shadow: var(--shadow-sm); }
.faq-item summary {
  cursor: pointer;
  padding: 20px 24px;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}
.faq-item summary .fa-plus { color: var(--primary); transition: transform .3s ease; flex-shrink: 0; }
.faq-item[open] summary .fa-plus { transform: rotate(45deg); }
.faq-item .faq-answer {
  padding: 0 22px 20px 22px;
  color: var(--text-muted);
  font-size: .95rem;
  line-height: 1.8;
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  padding: 70px 0;
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -50px;
  left: -50px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255,255,255,.08);
}
.cta-section::after {
  content: '';
  position: absolute;
  bottom: -60px;
  right: -40px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
}
.cta-section h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 14px;
}
.cta-section p { font-size: 1.05rem; opacity: .9; margin-bottom: 30px; }
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #fff;
  color: var(--primary) !important;
  padding: 14px 40px;
  border-radius: 100px;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: 0 8px 30px rgba(0,0,0,.18);
  transition: all .3s ease;
}
.cta-btn:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 40px rgba(0,0,0,.25);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--dark-bg);
  color: rgba(255,255,255,.7);
  padding: 70px 0 0;
  font-size: .92rem;
}
.site-footer h5 {
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 18px;
}
.site-footer a:hover { color: var(--accent); }
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 16px;
}
.footer-brand i {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}
.footer-desc { line-height: 1.8; color: rgba(255,255,255,.55); }
.site-footer ul li { padding: 5px 0; }
.site-footer ul li a {
  color: rgba(255,255,255,.6);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all .25s ease;
}
.site-footer ul li a i { font-size: .7rem; color: var(--accent); }
.site-footer ul li a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 24px 0;
  margin-top: 40px;
  text-align: center;
  color: rgba(255,255,255,.4);
  font-size: .85rem;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .section { padding: 60px 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .site-header .navbar-collapse {
    background: #fff;
    border-radius: 16px;
    padding: 18px;
    box-shadow: var(--shadow-lg);
    margin-top: 12px;
    border: 1px solid var(--border);
  }
  .site-header .nav-link.active::after { display: none; }
  .page-banner { padding: 80px 0 60px; }
  .banner-stats { gap: 20px; }
  .steps-wrapper { padding: 30px 24px; }
  .step-item { padding-left: 56px; }
  .step-item .step-num { width: 40px; height: 40px; font-size: 1rem; }
  .feature-content { padding: 28px 24px; }
  .stats-grid { gap: 14px; }
}
@media (max-width: 520px) {
  .section { padding: 46px 0; }
  .section-head h2 { font-size: 1.6rem; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .stat-card { padding: 22px 10px; }
  .stat-card .stat-num { font-size: 1.5rem; }
  .banner-stats { gap: 14px; flex-direction: column; }
  .banner-stats .stat-item { padding-right: 0; }
  .category-tab { padding: 8px 16px; font-size: .85rem; }
  .footer-brand { font-size: 1.1rem; }
}

/* roulang page: category3 */
:root {
    --primary: #7c3aed;
    --primary-dark: #6d28d9;
    --primary-light: #a78bfa;
    --secondary: #f59e0b;
    --secondary-light: #fbbf24;
    --accent: #06b6d4;
    --bg-body: #0f071f;
    --bg-deep: #0a0518;
    --bg-card: #1a1030;
    --bg-card-2: #221540;
    --bg-soft: rgba(124, 58, 237, 0.08);
    --text-main: #f1eef7;
    --text-weak: #a89bc0;
    --border-soft: rgba(167, 139, 250, 0.18);
    --border-strong: rgba(167, 139, 250, 0.35);
    --radius-lg: 18px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.35);
    --shadow-glow: 0 0 30px rgba(124, 58, 237, 0.25);
    --transition-base: all 0.3s ease;
    --font-base: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: var(--font-base);
    background: var(--bg-body);
    color: var(--text-main);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
a {
    text-decoration: none;
    color: var(--text-main);
    transition: var(--transition-base);
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}
button,
input,
select,
textarea {
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
}
.container {
    max-width: 1200px;
    padding-left: 20px;
    padding-right: 20px;
}
::selection {
    background: rgba(124, 58, 237, 0.4);
    color: #fff;
}
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--bg-deep);
}
::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-light);
}

/* Header & Nav */
.site-header {
    background: rgba(15, 7, 31, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-soft);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 10px 0;
}
.navbar {
    padding: 6px 0;
}
.navbar-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: 0.5px;
    transition: var(--transition-base);
}
.navbar-brand:hover {
    color: var(--primary-light);
    transform: translateY(-1px);
}
.brand-icon {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 12px;
    font-size: 1.1rem;
    color: #fff;
    box-shadow: 0 0 18px rgba(124, 58, 237, 0.35);
}
.navbar-nav {
    gap: 4px;
}
.nav-link {
    color: var(--text-weak);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 18px !important;
    border-radius: 30px;
    transition: var(--transition-base);
    position: relative;
}
.nav-link:hover {
    color: var(--text-main);
    background: rgba(124, 58, 237, 0.12);
}
.nav-link.active {
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    box-shadow: 0 4px 14px rgba(124, 58, 237, 0.35);
}
.nav-cta {
    padding: 8px 22px;
    border-radius: 30px;
    background: linear-gradient(135deg, var(--secondary), #f97316);
    border: none;
    font-weight: 700;
    font-size: 0.9rem;
    color: #1a1030;
    box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
    transition: var(--transition-base);
    display: inline-flex;
    align-items: center;
}
.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(245, 158, 11, 0.45);
    color: #1a1030;
}
.navbar-toggler {
    border: 1px solid var(--border-strong);
    padding: 6px 10px;
    border-radius: 10px;
    background: transparent;
}
.navbar-toggler:focus {
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.25);
}
.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(241,238,247,0.85)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Page Banner */
.page-banner {
    position: relative;
    padding: 80px 0 90px;
    background: linear-gradient(135deg, #2d1b4e 0%, #0f071f 55%, #1a1030 100%);
    overflow: hidden;
}
.page-banner::before {
    content: "";
    position: absolute;
    top: -60%;
    right: -20%;
    width: 550px;
    height: 550px;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.35) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}
.page-banner::after {
    content: "";
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, rgba(6, 182, 212, 0.2) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}
.banner-bg-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.22;
    z-index: 1;
}
.banner-content {
    position: relative;
    z-index: 3;
}
.banner-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(124, 58, 237, 0.18);
    border: 1px solid var(--border-strong);
    color: var(--primary-light);
    padding: 6px 16px;
    border-radius: 30px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 16px;
}
.banner-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    color: #fff;
    line-height: 1.25;
    margin-bottom: 14px;
    position: relative;
}
.banner-title .gradient-text {
    background: linear-gradient(135deg, var(--primary-light), var(--secondary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.banner-desc {
    color: var(--text-weak);
    font-size: 1.02rem;
    max-width: 620px;
    margin-bottom: 28px;
}
.btn-light-custom {
    background: linear-gradient(135deg, var(--secondary), #f97316);
    border: none;
    color: #1a1030;
    font-weight: 700;
    padding: 12px 32px;
    border-radius: 30px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35);
    transition: var(--transition-base);
}
.btn-light-custom:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(245, 158, 11, 0.5);
    color: #1a1030;
}
.btn-outline-light-custom {
    background: transparent;
    border: 1px solid var(--border-strong);
    color: var(--text-main);
    font-weight: 600;
    padding: 12px 28px;
    border-radius: 30px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition-base);
}
.btn-outline-light-custom:hover {
    background: rgba(124, 58, 237, 0.15);
    border-color: var(--primary-light);
    color: var(--primary-light);
    transform: translateY(-2px);
}

/* Stats Bar */
.stats-strip {
    background: var(--bg-deep);
    border-bottom: 1px solid var(--border-soft);
    padding: 28px 0;
}
.stats-strip .stat-item {
    text-align: center;
    padding: 12px;
}
.stats-strip .stat-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-light);
    line-height: 1.2;
}
.stats-strip .stat-label {
    color: var(--text-weak);
    font-size: 0.85rem;
    margin-top: 4px;
}

/* Section General */
.section-padding {
    padding: 90px 0;
}
.section-head {
    text-align: center;
    margin-bottom: 52px;
}
.section-tag {
    display: inline-block;
    background: rgba(124, 58, 237, 0.12);
    border: 1px solid rgba(124, 58, 237, 0.3);
    color: var(--primary-light);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 6px 18px;
    border-radius: 30px;
    letter-spacing: 1px;
    margin-bottom: 14px;
    text-transform: uppercase;
}
.section-title {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 10px;
    line-height: 1.3;
}
.section-sub {
    color: var(--text-weak);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    font-size: 0.98rem;
}

/* Promo Activity Cards */
.promo-section {
    position: relative;
    background: var(--bg-deep);
}
.promo-cards-wrap {
    position: relative;
    z-index: 2;
}
.promo-card {
    background: var(--bg-card);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-base);
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
}
.promo-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}
.promo-card-img {
    position: relative;
    height: 210px;
    overflow: hidden;
}
.promo-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.promo-card:hover .promo-card-img img {
    transform: scale(1.06);
}
.promo-card-img::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 40%;
    background: linear-gradient(to top, rgba(26, 16, 48, 0.95), transparent);
}
.promo-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    z-index: 5;
    background: linear-gradient(135deg, var(--secondary), #f97316);
    color: #1a1030;
    font-size: 0.75rem;
    font-weight: 800;
    padding: 5px 14px;
    border-radius: 30px;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}
.promo-tag.hot {
    background: linear-gradient(135deg, #ef4444, #f97316);
    color: #fff;
}
.promo-card-body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.promo-card-title {
    font-size: 1.12rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
    line-height: 1.4;
}
.promo-card-desc {
    color: var(--text-weak);
    font-size: 0.88rem;
    margin-bottom: 16px;
    flex: 1;
}
.promo-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    padding-top: 14px;
    border-top: 1px solid var(--border-soft);
}
.promo-meta span {
    font-size: 0.78rem;
    color: var(--text-weak);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}
.promo-meta i {
    color: var(--primary-light);
    font-size: 0.7rem;
}
.promo-btn {
    display: inline-block;
    background: transparent;
    border: 1px solid var(--border-strong);
    color: var(--primary-light);
    padding: 8px 20px;
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition-base);
    width: fit-content;
}
.promo-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(124, 58, 237, 0.4);
}

/* Steps / Process */
.steps-section {
    background: var(--bg-card);
    border-top: 1px solid var(--border-soft);
    border-bottom: 1px solid var(--border-soft);
}
.step-card {
    text-align: center;
    padding: 36px 24px;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    background: rgba(26, 16, 48, 0.6);
    transition: var(--transition-base);
    height: 100%;
}
.step-card:hover {
    border-color: var(--border-strong);
    background: rgba(34, 21, 64, 0.9);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.step-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 20px;
    font-size: 1.5rem;
    color: #fff;
    box-shadow: 0 8px 24px rgba(124, 58, 237, 0.35);
}
.step-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
}
.step-desc {
    color: var(--text-weak);
    font-size: 0.88rem;
    line-height: 1.6;
}

/* Rules / Info List */
.rules-section {
    background: var(--bg-body);
}
.rules-card {
    background: var(--bg-card);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    padding: 32px;
    height: 100%;
    transition: var(--transition-base);
}
.rules-card:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-sm);
}
.rules-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 18px;
}
.rules-card-header i {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    font-size: 0.95rem;
    background: var(--bg-soft);
    color: var(--primary-light);
}
.rules-card-header h4 {
    font-size: 1.02rem;
    font-weight: 700;
    color: #fff;
    margin: 0;
}
.rules-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.rules-list li {
    color: var(--text-weak);
    font-size: 0.88rem;
    padding: 8px 0;
    border-bottom: 1px dashed var(--border-soft);
    display: flex;
    gap: 10px;
    align-items: flex-start;
}
.rules-list li:last-child {
    border-bottom: none;
}
.rules-list li i {
    color: var(--secondary);
    font-size: 0.7rem;
    margin-top: 5px;
}

/* CTA Section */
.cta-section {
    position: relative;
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--accent) 100%);
    overflow: hidden;
    text-align: center;
}
.cta-section::before {
    content: "";
    position: absolute;
    top: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.12) 0%, transparent 65%);
    border-radius: 50%;
}
.cta-section .container {
    position: relative;
    z-index: 2;
}
.cta-title {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
}
.cta-desc {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
    max-width: 600px;
    margin: 0 auto 30px;
}
.btn-white {
    background: #fff;
    color: var(--primary-dark);
    border: none;
    font-weight: 700;
    padding: 14px 38px;
    border-radius: 30px;
    display: inline-block;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    transition: var(--transition-base);
}
.btn-white:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
    color: var(--primary-dark);
}
.btn-ghost-white {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.5);
    color: #fff;
    font-weight: 600;
    padding: 13px 34px;
    border-radius: 30px;
    display: inline-block;
    transition: var(--transition-base);
    margin-left: 12px;
}
.btn-ghost-white:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    transform: translateY(-2px);
}

/* FAQ */
.faq-section {
    background: var(--bg-deep);
}
.accordion-wrap .accordion-item {
    background: var(--bg-card);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-md) !important;
    margin-bottom: 14px;
    overflow: hidden;
    transition: var(--transition-base);
}
.accordion-wrap .accordion-item:last-child {
    margin-bottom: 0;
}
.accordion-wrap .accordion-button {
    background: var(--bg-card);
    color: #fff;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 18px 22px;
    border: none;
    box-shadow: none;
    transition: var(--transition-base);
}
.accordion-wrap .accordion-button:focus {
    box-shadow: none;
}
.accordion-wrap .accordion-button:not(.collapsed) {
    background: var(--bg-card-2);
    color: var(--primary-light);
}
.accordion-wrap .accordion-button::after {
    filter: brightness(0.8) sepia(0.4) hue-rotate(220deg);
}
.accordion-wrap .accordion-body {
    padding: 0 22px 20px;
    color: var(--text-weak);
    font-size: 0.88rem;
    line-height: 1.7;
}

/* Footer */
.site-footer {
    background: var(--bg-deep);
    border-top: 1px solid var(--border-soft);
    padding: 70px 0 0;
}
.footer-brand {
    font-size: 1.15rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.footer-brand i {
    color: var(--primary-light);
}
.footer-desc {
    color: var(--text-weak);
    font-size: 0.88rem;
    line-height: 1.7;
    margin-bottom: 16px;
}
.site-footer h5 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 18px;
    letter-spacing: 0.5px;
}
.site-footer ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.site-footer ul li {
    margin-bottom: 10px;
    font-size: 0.86rem;
    color: var(--text-weak);
}
.site-footer ul li a {
    color: var(--text-weak);
    font-size: 0.86rem;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    transition: var(--transition-base);
}
.site-footer ul li a:hover {
    color: var(--primary-light);
    padding-left: 4px;
}
.site-footer ul li a i {
    font-size: 0.65rem;
    color: var(--primary-light);
}
.footer-bottom {
    border-top: 1px solid var(--border-soft);
    margin-top: 40px;
    padding: 22px 0;
    text-align: center;
}
.footer-bottom p {
    color: var(--text-weak);
    font-size: 0.82rem;
    margin: 0;
}

/* Responsive */
@media (max-width: 991px) {
    .navbar-collapse {
        background: var(--bg-deep);
        border: 1px solid var(--border-soft);
        border-radius: var(--radius-md);
        padding: 18px;
        margin-top: 14px;
    }
    .navbar-nav {
        margin-bottom: 14px;
    }
    .nav-cta {
        width: 100%;
        justify-content: center;
    }
    .page-banner {
        padding: 60px 0 70px;
    }
    .section-padding {
        padding: 70px 0;
    }
}
@media (max-width: 768px) {
    .page-banner {
        padding: 50px 0 60px;
    }
    .banner-title {
        font-size: 1.7rem;
    }
    .stats-strip .stat-num {
        font-size: 1.5rem;
    }
    .promo-card-img {
        height: 190px;
    }
    .cta-section {
        padding: 60px 0;
    }
    .btn-ghost-white {
        margin-left: 0;
        margin-top: 12px;
    }
    .rules-card {
        padding: 24px;
        margin-bottom: 20px;
    }
}
@media (max-width: 520px) {
    .banner-title {
        font-size: 1.4rem;
    }
    .banner-desc {
        font-size: 0.92rem;
    }
    .section-title {
        font-size: 1.35rem;
    }
    .section-sub {
        font-size: 0.9rem;
    }
    .promo-card-body {
        padding: 18px;
    }
    .btn-light-custom,
    .btn-outline-light-custom {
        display: flex;
        width: 100%;
        justify-content: center;
        margin-bottom: 10px;
    }
    .stats-strip .stat-item {
        padding: 8px;
    }
    .stats-strip .stat-num {
        font-size: 1.25rem;
    }
}