/* roulang page: index */
:root {
        --primary: #1e3a5f;
        --primary-dark: #15294a;
        --primary-light: #2d4a7a;
        --accent: #f59e0b;
        --accent-dark: #d97706;
        --bg: #f8fafc;
        --bg-alt: #eef2f7;
        --text: #1e293b;
        --text-muted: #64748b;
        --border: #e2e8f0;
        --radius-lg: 24px;
        --radius-md: 16px;
        --radius-sm: 10px;
        --shadow-sm: 0 2px 10px rgba(30, 41, 59, .06);
        --shadow-md: 0 6px 24px rgba(30, 41, 59, .1);
        --shadow-lg: 0 12px 36px rgba(30, 41, 59, .14);
        --transition: all .3s cubic-bezier(.4, 0, .2, 1);
    }

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

    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
    }

    body {
        font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
        color: var(--text);
        background: var(--bg);
        line-height: 1.6;
        overflow-x: hidden;
    }

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

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

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

    .container {
        width: 100%;
        max-width: 1280px;
        margin: 0 auto;
        padding-left: 24px;
        padding-right: 24px;
    }

    /* ===== Header ===== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(255, 255, 255, .92);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid rgba(226, 232, 240, .7);
        box-shadow: 0 1px 20px rgba(30, 41, 59, .05);
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 72px;
        gap: 20px;
    }

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

    .logo-icon {
        width: 42px;
        height: 42px;
        border-radius: 12px;
        background: linear-gradient(135deg, #1e3a5f, #2d4a7a);
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fbbf24;
        font-size: 18px;
        box-shadow: 0 4px 12px rgba(30, 58, 95, .25);
    }

    .logo-text {
        font-size: 1.25rem;
        font-weight: 800;
        color: var(--primary);
        letter-spacing: .5px;
        line-height: 1.2;
    }

    .logo-text span {
        display: block;
        font-size: .7rem;
        font-weight: 500;
        color: var(--text-muted);
        letter-spacing: 2px;
    }

    .main-nav {
        display: flex;
        align-items: center;
        gap: 8px;
        margin: 0 20px;
    }

    .nav-link {
        padding: 8px 18px;
        border-radius: 999px;
        font-size: .95rem;
        font-weight: 600;
        color: #475569;
        transition: var(--transition);
        position: relative;
    }

    .nav-link:hover {
        color: var(--primary);
        background: rgba(30, 58, 95, .06);
    }

    .nav-link.active {
        color: var(--primary);
        background: rgba(30, 58, 95, .1);
    }

    .nav-link.active::after {
        content: '';
        position: absolute;
        bottom: 2px;
        left: 50%;
        transform: translateX(-50%);
        width: 20px;
        height: 3px;
        border-radius: 3px;
        background: linear-gradient(90deg, var(--accent), #fbbf24);
    }

    .header-actions {
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .search-box {
        display: flex;
        align-items: center;
        background: #f1f5f9;
        border-radius: 999px;
        padding: 0 16px;
        height: 40px;
        width: 220px;
        transition: var(--transition);
        border: 1px solid transparent;
    }

    .search-box:focus-within {
        background: #fff;
        border-color: #cbd5e1;
        box-shadow: 0 0 0 3px rgba(30, 58, 95, .08);
        width: 260px;
    }

    .search-box i {
        color: #94a3b8;
        font-size: 14px;
        margin-right: 8px;
    }

    .search-box input {
        width: 100%;
        font-size: .875rem;
        color: var(--text);
        background: transparent;
    }

    .search-box input::placeholder {
        color: #94a3b8;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 28px;
        border-radius: 999px;
        font-weight: 700;
        font-size: .95rem;
        cursor: pointer;
        transition: var(--transition);
        border: none;
        white-space: nowrap;
    }

    .btn-primary {
        background: linear-gradient(135deg, #1e3a5f, #2d4a7a);
        color: #fff;
        box-shadow: 0 4px 16px rgba(30, 58, 95, .3);
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(30, 58, 95, .35);
    }

    .btn-accent {
        background: linear-gradient(135deg, #f59e0b, #fbbf24);
        color: #15294a;
        box-shadow: 0 4px 16px rgba(245, 158, 11, .35);
    }

    .btn-accent:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 28px rgba(245, 158, 11, .45);
    }

    .btn-outline {
        background: transparent;
        color: #fff;
        border: 2px solid rgba(255, 255, 255, .7);
        backdrop-filter: blur(4px);
    }

    .btn-outline:hover {
        background: rgba(255, 255, 255, .15);
        border-color: #fff;
    }

    .btn-sm {
        padding: 8px 20px;
        font-size: .875rem;
    }

    .btn-lg {
        padding: 16px 36px;
        font-size: 1.05rem;
    }

    .mobile-toggle {
        display: none;
        width: 42px;
        height: 42px;
        border-radius: 12px;
        background: #f1f5f9;
        color: var(--primary);
        font-size: 18px;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        transition: var(--transition);
    }

    .mobile-toggle:hover {
        background: #e2e8f0;
    }

    /* ===== Hero ===== */
    .hero {
        position: relative;
        min-height: 620px;
        display: flex;
        align-items: center;
        background:
            linear-gradient(120deg, rgba(15, 31, 56, .92) 0%, rgba(30, 58, 95, .78) 50%, rgba(45, 74, 122, .65) 100%),
            url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
        color: #fff;
        overflow: hidden;
    }

    .hero::before {
        content: '';
        position: absolute;
        width: 600px;
        height: 600px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(245, 158, 11, .2), transparent 70%);
        top: -200px;
        right: -100px;
        pointer-events: none;
    }

    .hero::after {
        content: '';
        position: absolute;
        width: 400px;
        height: 400px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(255, 255, 255, .06), transparent 70%);
        bottom: -150px;
        left: 10%;
        pointer-events: none;
    }

    .hero-content {
        max-width: 720px;
        position: relative;
        z-index: 2;
        padding: 80px 0;
    }

    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(255, 255, 255, .12);
        border: 1px solid rgba(255, 255, 255, .2);
        backdrop-filter: blur(8px);
        padding: 6px 16px;
        border-radius: 999px;
        font-size: .85rem;
        font-weight: 600;
        color: #fbbf24;
        margin-bottom: 24px;
    }

    .hero h1 {
        font-size: clamp(1.9rem, 4.2vw, 3.2rem);
        font-weight: 800;
        line-height: 1.25;
        margin-bottom: 20px;
        letter-spacing: .5px;
    }

    .hero h1 .highlight {
        background: linear-gradient(135deg, #fbbf24, #f59e0b);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .hero-desc {
        font-size: 1.15rem;
        line-height: 1.7;
        color: rgba(255, 255, 255, .85);
        margin-bottom: 32px;
        max-width: 640px;
    }

    .hero-buttons {
        display: flex;
        flex-wrap: wrap;
        gap: 16px;
        margin-bottom: 48px;
    }

    .hero-stats {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 16px;
        max-width: 640px;
    }

    .hero-stat {
        background: rgba(255, 255, 255, .08);
        border: 1px solid rgba(255, 255, 255, .12);
        backdrop-filter: blur(8px);
        border-radius: 16px;
        padding: 16px 12px;
        text-align: center;
        transition: var(--transition);
    }

    .hero-stat:hover {
        background: rgba(255, 255, 255, .14);
        transform: translateY(-4px);
    }

    .hero-stat .num {
        font-size: 1.6rem;
        font-weight: 800;
        color: #fbbf24;
        line-height: 1.2;
    }

    .hero-stat .label {
        font-size: .8rem;
        color: rgba(255, 255, 255, .75);
        margin-top: 4px;
    }

    /* ===== Section base ===== */
    .section {
        padding: 80px 0;
    }

    .section-alt {
        background: #fff;
    }

    .section-alt2 {
        background: linear-gradient(180deg, #f8fafc, #eef2f7);
    }

    .section-header {
        text-align: center;
        max-width: 720px;
        margin: 0 auto 48px;
    }

    .section-header .subtitle {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        color: var(--accent-dark);
        font-weight: 700;
        font-size: .85rem;
        text-transform: uppercase;
        letter-spacing: 2px;
        margin-bottom: 12px;
        padding: 6px 16px;
        background: rgba(245, 158, 11, .1);
        border-radius: 999px;
    }

    .section-header h2 {
        font-size: clamp(1.6rem, 3vw, 2.4rem);
        font-weight: 800;
        color: var(--primary);
        margin-bottom: 16px;
        line-height: 1.3;
    }

    .section-header p {
        color: var(--text-muted);
        font-size: 1rem;
        line-height: 1.7;
    }

    /* ===== Feature cards ===== */
    .feature-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }

    .feature-card {
        background: #fff;
        border-radius: var(--radius-lg);
        padding: 32px 28px;
        border: 1px solid var(--border);
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        position: relative;
        overflow: hidden;
    }

    .feature-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 4px;
        background: linear-gradient(90deg, var(--accent), #fbbf24, var(--accent));
        opacity: 0;
        transition: var(--transition);
    }

    .feature-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
    }

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

    .feature-icon {
        width: 56px;
        height: 56px;
        border-radius: 16px;
        background: linear-gradient(135deg, #eff6ff, #dbeafe);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        color: var(--primary);
        margin-bottom: 20px;
        transition: var(--transition);
    }

    .feature-card:hover .feature-icon {
        background: linear-gradient(135deg, #1e3a5f, #2d4a7a);
        color: #fbbf24;
        transform: scale(1.05) rotate(-5deg);
    }

    .feature-card h3 {
        font-size: 1.2rem;
        font-weight: 700;
        color: var(--primary);
        margin-bottom: 10px;
    }

    .feature-card p {
        color: var(--text-muted);
        font-size: .92rem;
        line-height: 1.7;
    }

    /* ===== Sports ===== */
    .sports-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }

    .sport-card {
        border-radius: var(--radius-lg);
        overflow: hidden;
        position: relative;
        height: 320px;
        background: var(--primary-dark);
        box-shadow: var(--shadow-md);
        transition: var(--transition);
        cursor: pointer;
    }

    .sport-card img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform .6s ease;
        opacity: .85;
    }

    .sport-card:hover img {
        transform: scale(1.06);
        opacity: .7;
    }

    .sport-card-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(to top, rgba(15, 31, 56, .92) 0%, rgba(15, 31, 56, .3) 60%, transparent 100%);
        display: flex;
        flex-direction: column;
        justify-content: flex-end;
        padding: 28px;
    }

    .sport-card-overlay .sport-icon {
        width: 44px;
        height: 44px;
        border-radius: 12px;
        background: rgba(255, 255, 255, .2);
        backdrop-filter: blur(8px);
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fbbf24;
        font-size: 18px;
        margin-bottom: 14px;
    }

    .sport-card-overlay h3 {
        color: #fff;
        font-size: 1.35rem;
        font-weight: 700;
        margin-bottom: 6px;
    }

    .sport-card-overlay p {
        color: rgba(255, 255, 255, .8);
        font-size: .88rem;
        line-height: 1.6;
    }

    /* ===== News CSS ===== */
    .news-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }

    .news-card {
        background: #fff;
        border-radius: var(--radius-lg);
        padding: 28px;
        border: 1px solid var(--border);
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        display: flex;
        flex-direction: column;
    }

    .news-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
        border-color: #cbd5e1;
    }

    .news-card .tag {
        display: inline-flex;
        align-items: center;
        padding: 4px 14px;
        border-radius: 999px;
        font-size: .78rem;
        font-weight: 700;
        color: var(--primary);
        background: rgba(30, 58, 95, .08);
        margin-bottom: 14px;
        align-self: flex-start;
    }

    .news-card .tag.gold {
        color: var(--accent-dark);
        background: rgba(245, 158, 11, .12);
    }

    .news-card h3 {
        font-size: 1.05rem;
        font-weight: 700;
        color: var(--text);
        line-height: 1.5;
        margin-bottom: 10px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .news-card p {
        font-size: .88rem;
        color: var(--text-muted);
        line-height: 1.65;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 16px;
        flex: 1;
    }

    .news-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        color: #94a3b8;
        font-size: .8rem;
        border-top: 1px solid #f1f5f9;
        padding-top: 14px;
    }

    .news-meta i {
        margin-right: 4px;
    }

    .news-empty {
        grid-column: 1/-1;
        text-align: center;
        padding: 48px;
        background: #fff;
        border-radius: var(--radius-lg);
        border: 1px dashed #cbd5e1;
        color: var(--text-muted);
    }

    /* ===== Stats ===== */
    .stats-section {
        background: linear-gradient(135deg, #0f1f38, #1e3a5f, #2d4a7a);
        padding: 70px 0;
        color: #fff;
        position: relative;
        overflow: hidden;
    }

    .stats-section::before {
        content: '';
        position: absolute;
        width: 500px;
        height: 500px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(245, 158, 11, .15), transparent 70%);
        top: -200px;
        left: -100px;
    }

    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 32px;
        position: relative;
        z-index: 2;
    }

    .stat-item {
        text-align: center;
        padding: 24px 16px;
        border-radius: 20px;
        background: rgba(255, 255, 255, .05);
        border: 1px solid rgba(255, 255, 255, .1);
        backdrop-filter: blur(8px);
        transition: var(--transition);
    }

    .stat-item:hover {
        background: rgba(255, 255, 255, .1);
        transform: translateY(-4px);
    }

    .stat-item .stat-num {
        font-size: 2.6rem;
        font-weight: 800;
        color: #fbbf24;
        line-height: 1.2;
    }

    .stat-item .stat-label {
        font-size: .95rem;
        color: rgba(255, 255, 255, .8);
        margin-top: 6px;
    }

    /* ===== Process ===== */
    .process-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 28px;
    }

    .process-step {
        text-align: center;
        padding: 32px 20px;
        background: #fff;
        border-radius: var(--radius-lg);
        border: 1px solid var(--border);
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        position: relative;
    }

    .process-step:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-md);
    }

    .step-num {
        width: 48px;
        height: 48px;
        border-radius: 50%;
        background: linear-gradient(135deg, var(--accent), #fbbf24);
        color: #15294a;
        font-weight: 800;
        font-size: 1.2rem;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 18px;
        box-shadow: 0 4px 16px rgba(245, 158, 11, .35);
    }

    .process-step h3 {
        font-size: 1.1rem;
        font-weight: 700;
        color: var(--primary);
        margin-bottom: 8px;
    }

    .process-step p {
        font-size: .88rem;
        color: var(--text-muted);
        line-height: 1.6;
    }

    /* ===== FAQ ===== */
    .faq-wrap {
        max-width: 800px;
        margin: 0 auto;
    }

    .faq-item {
        background: #fff;
        border-radius: var(--radius-md);
        border: 1px solid var(--border);
        margin-bottom: 16px;
        overflow: hidden;
        transition: var(--transition);
    }

    .faq-item:hover {
        border-color: #cbd5e1;
    }

    .faq-item.open {
        border-color: var(--accent);
        box-shadow: 0 4px 20px rgba(245, 158, 11, .12);
    }

    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 20px 24px;
        cursor: pointer;
        font-weight: 600;
        color: var(--text);
        font-size: .98rem;
        transition: var(--transition);
    }

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

    .faq-question i {
        color: var(--accent);
        font-size: 14px;
        transition: transform .3s ease;
        flex-shrink: 0;
        margin-left: 16px;
    }

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

    .faq-answer {
        padding: 0 24px;
        max-height: 0;
        overflow: hidden;
        transition: max-height .4s ease, padding .3s ease;
        color: var(--text-muted);
        font-size: .9rem;
        line-height: 1.7;
    }

    .faq-item.open .faq-answer {
        padding: 0 24px 20px;
        max-height: 300px;
    }

    /* ===== CTA ===== */
    .cta-section {
        background:
            linear-gradient(120deg, rgba(15, 31, 56, .88), rgba(30, 58, 95, .75)),
            url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
        padding: 90px 0;
        text-align: center;
        color: #fff;
        position: relative;
        overflow: hidden;
    }

    .cta-section::before {
        content: '';
        position: absolute;
        width: 400px;
        height: 400px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(245, 158, 11, .2), transparent 70%);
        bottom: -150px;
        right: -50px;
    }

    .cta-content {
        max-width: 680px;
        margin: 0 auto;
        position: relative;
        z-index: 2;
    }

    .cta-content h2 {
        font-size: clamp(1.6rem, 3vw, 2.4rem);
        font-weight: 800;
        margin-bottom: 16px;
        line-height: 1.3;
    }

    .cta-content p {
        font-size: 1.05rem;
        color: rgba(255, 255, 255, .85);
        margin-bottom: 32px;
        line-height: 1.7;
    }

    /* ===== Footer ===== */
    .site-footer {
        background: #0f1f38;
        color: rgba(255, 255, 255, .7);
        padding: 60px 0 30px;
    }

    .footer-inner {
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
        gap: 40px;
        flex-wrap: wrap;
        padding-bottom: 40px;
        border-bottom: 1px solid rgba(255, 255, 255, .1);
        margin-bottom: 30px;
    }

    .footer-brand {
        max-width: 360px;
    }

    .footer-brand .logo {
        margin-bottom: 16px;
    }

    .footer-brand .logo-text {
        color: #fff;
    }

    .footer-brand .logo-text span {
        color: rgba(255, 255, 255, .5);
    }

    .footer-brand p {
        font-size: .88rem;
        line-height: 1.7;
        color: rgba(255, 255, 255, .55);
    }

    .footer-links {
        display: flex;
        gap: 60px;
    }

    .footer-links h4 {
        color: #fff;
        font-size: 1rem;
        font-weight: 700;
        margin-bottom: 16px;
    }

    .footer-links a {
        display: block;
        color: rgba(255, 255, 255, .6);
        font-size: .88rem;
        padding: 4px 0;
        transition: var(--transition);
    }

    .footer-links a:hover {
        color: #fbbf24;
        padding-left: 6px;
    }

    .footer-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        font-size: .82rem;
        color: rgba(255, 255, 255, .4);
    }

    .footer-bottom a {
        color: rgba(255, 255, 255, .5);
        transition: var(--transition);
    }

    .footer-bottom a:hover {
        color: #fbbf24;
    }

    /* ===== Mobile Nav ===== */
    .mobile-nav {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        padding: 16px 24px 24px;
        box-shadow: 0 20px 40px rgba(15, 31, 56, .15);
        border-radius: 0 0 20px 20px;
        z-index: 99;
        flex-direction: column;
        gap: 8px;
    }

    .mobile-nav.active {
        display: flex;
    }

    .mobile-nav .nav-link {
        padding: 12px 16px;
        border-radius: 12px;
        font-size: 1rem;
    }

    .mobile-nav .nav-link.active {
        background: rgba(30, 58, 95, .08);
    }

    .mobile-nav .btn {
        margin-top: 12px;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .container {
            padding-left: 20px;
            padding-right: 20px;
        }

        .main-nav {
            margin: 0 10px;
        }

        .nav-link {
            padding: 8px 12px;
            font-size: .88rem;
        }

        .search-box {
            width: 160px;
        }

        .search-box:focus-within {
            width: 200px;
        }

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

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

        .process-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .stats-grid {
            gap: 20px;
        }
    }

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

        .logo-text {
            font-size: 1.05rem;
        }

        .logo-text span {
            font-size: .6rem;
        }

        .main-nav {
            display: none;
        }

        .search-box {
            display: none;
        }

        .header-actions .btn-primary {
            display: none;
        }

        .mobile-toggle {
            display: flex;
        }

        .hero {
            min-height: 520px;
        }

        .hero-content {
            padding: 60px 0;
        }

        .hero h1 {
            font-size: 1.9rem;
        }

        .hero-desc {
            font-size: 1rem;
        }

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

        .section {
            padding: 56px 0;
        }

        .feature-grid,
        .sports-grid,
        .news-grid {
            grid-template-columns: 1fr;
        }

        .sport-card {
            height: 260px;
        }

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

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

        .faq-question {
            padding: 16px 18px;
            font-size: .9rem;
        }

        .faq-answer {
            padding: 0 18px;
        }

        .faq-item.open .faq-answer {
            padding: 0 18px 16px;
        }

        .footer-inner {
            flex-direction: column;
            gap: 32px;
        }

        .footer-links {
            gap: 40px;
        }

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

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

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

        .logo-icon {
            width: 36px;
            height: 36px;
            font-size: 15px;
        }

        .logo-text {
            font-size: .95rem;
        }

        .hero-buttons .btn {
            width: 100%;
        }

        .hero-stats {
            gap: 10px;
        }

        .hero-stat {
            padding: 14px 8px;
        }

        .hero-stat .num {
            font-size: 1.3rem;
        }

        .section-header h2 {
            font-size: 1.5rem;
        }

        .section-header p {
            font-size: .9rem;
        }

        .feature-card {
            padding: 24px 20px;
        }

        .sport-card {
            height: 220px;
        }

        .sport-card-overlay {
            padding: 20px;
        }

        .sport-card-overlay h3 {
            font-size: 1.1rem;
        }

        .news-card {
            padding: 20px;
        }

        .news-card h3 {
            font-size: .95rem;
        }

        .stat-item .stat-num {
            font-size: 2rem;
        }

        .stat-item .stat-label {
            font-size: .82rem;
        }

        .btn-lg {
            width: 100%;
        }
    }

    /* ===== Animations ===== */
    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(30px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .animate-fade-up {
        animation: fadeInUp .8s ease forwards;
    }

    .animate-delay-1 {
        animation-delay: .15s;
        opacity: 0;
    }

    .animate-delay-2 {
        animation-delay: .3s;
        opacity: 0;
    }

    .animate-delay-3 {
        animation-delay: .45s;
        opacity: 0;
    }

    .text-gradient {
        background: linear-gradient(135deg, #fbbf24, #f59e0b);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

/* roulang page: category1 */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #eff6ff;
            --accent: #7c3aed;
            --bg: #f8fafc;
            --surface: #ffffff;
            --text: #0f172a;
            --text-weak: #64748b;
            --border: #e2e8f0;
            --radius: 20px;
            --radius-sm: 12px;
            --shadow: 0 10px 30px rgba(2, 12, 27, 0.08);
            --shadow-hover: 0 18px 40px rgba(2, 12, 27, 0.14);
            --transition: all .3s ease;
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        button {
            border: none;
            cursor: pointer;
            font-family: inherit;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header */
        .site-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
            gap: 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
        }
        .logo-text {
            font-weight: 700;
            font-size: 20px;
            color: var(--text);
            letter-spacing: -0.02em;
            line-height: 1.2;
            display: flex;
            flex-direction: column;
        }
        .logo-text span {
            font-size: 12px;
            font-weight: 500;
            color: var(--text-weak);
            letter-spacing: 0.04em;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
            margin: 0 auto;
        }
        .nav-link {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-weak);
            padding: 8px 2px;
            transition: var(--transition);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 2px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform .3s ease;
        }
        .nav-link:hover {
            color: var(--text);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            position: relative;
            display: flex;
            align-items: center;
        }
        .search-box input {
            width: 180px;
            padding: 10px 16px 10px 40px;
            border: 1.5px solid var(--border);
            border-radius: 50px;
            background: var(--bg);
            font-size: 14px;
            outline: none;
            transition: var(--transition);
        }
        .search-box input:focus {
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
            width: 220px;
        }
        .search-box i {
            position: absolute;
            left: 15px;
            color: var(--text-weak);
            font-size: 14px;
            pointer-events: none;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.28);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(124, 58, 237, 0.32);
        }
        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--border);
            color: var(--text);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-toggle {
            display: none;
            background: none;
            font-size: 24px;
            color: var(--text);
        }

        /* Hero */
        .hero {
            position: relative;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.8), rgba(59, 7, 100, 0.65)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            min-height: 560px;
            display: flex;
            align-items: center;
            text-align: center;
            color: #fff;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 20% 80%, rgba(37, 99, 235, 0.3) 0%, transparent 50%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
            padding: 60px 24px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 24px;
        }
        .hero-content h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
            text-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
        }
        .hero-content p {
            font-size: 18px;
            opacity: 0.92;
            margin-bottom: 36px;
            line-height: 1.7;
        }
        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-buttons .btn-primary {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }
        .hero-buttons .btn-primary:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
        }
        .hero-buttons .btn-outline {
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
        }
        .hero-buttons .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
        }

        /* Section */
        .section {
            padding: 88px 0;
        }
        .section-label {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 50px;
            letter-spacing: 0.04em;
            margin-bottom: 16px;
        }
        .section-title {
            font-size: 34px;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.2;
            color: var(--text);
            margin-bottom: 16px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-weak);
            max-width: 680px;
            margin-bottom: 48px;
            line-height: 1.7;
        }
        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-head .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* Intro */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            align-items: center;
            gap: 56px;
        }
        .intro-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            position: relative;
        }
        .intro-image img {
            width: 100%;
            height: 420px;
            object-fit: cover;
        }
        .intro-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(37, 99, 235, 0.12), transparent 60%);
        }
        .intro-content h2 {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
        }
        .intro-content p {
            color: var(--text-weak);
            font-size: 16px;
            margin-bottom: 20px;
            line-height: 1.8;
        }
        .intro-list {
            margin: 24px 0;
            list-style: none;
        }
        .intro-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            font-size: 15px;
            color: var(--text);
        }
        .intro-list li i {
            margin-top: 4px;
            color: var(--primary);
            background: var(--primary-light);
            width: 22px;
            height: 22px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            flex-shrink: 0;
        }

        /* Cards */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .category-card {
            position: relative;
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .category-card .card-media {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .category-card .card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .category-card:hover .card-media img {
            transform: scale(1.06);
        }
        .category-card .card-media::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 23, 42, 0.1), transparent 70%);
        }
        .category-card .card-body {
            padding: 24px;
        }
        .category-card .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 12px;
            border-radius: 50px;
            margin-bottom: 12px;
        }
        .category-card .card-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .category-card .card-body p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.6;
        }
        .category-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            margin-top: 16px;
        }
        .category-card .card-link i {
            transition: transform .3s ease;
        }
        .category-card:hover .card-link i {
            transform: translateX(4px);
        }

        /* Feature */
        .feature-section {
            background: linear-gradient(180deg, var(--bg), #fff);
        }
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-item {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 32px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity .3s ease;
        }
        .feature-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .feature-item:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            background: linear-gradient(135deg, var(--primary-light), #f3e8ff);
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 22px;
            margin-bottom: 20px;
        }
        .feature-item h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .feature-item p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* Process */
        .process-section {
            background: linear-gradient(135deg, var(--primary-light), #f5f3ff);
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            counter-reset: step;
        }
        .process-item {
            position: relative;
            text-align: center;
            padding: 36px 28px;
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
        }
        .process-item::before {
            counter-increment: step;
            content: counter(step);
            position: absolute;
            top: -18px;
            left: 50%;
            transform: translateX(-50%);
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
        }
        .process-icon {
            font-size: 32px;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .process-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .process-item p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* Stats */
        .stats-section {
            background: linear-gradient(135deg, #0f172a, #1e1b4b);
            color: #fff;
            padding: 72px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            text-align: center;
        }
        .stat-item {
            padding: 24px;
        }
        .stat-number {
            font-size: 42px;
            font-weight: 800;
            background: linear-gradient(135deg, #60a5fa, #a78bfa);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 8px;
            line-height: 1.2;
        }
        .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 22px 28px;
            cursor: pointer;
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            list-style: none;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary i {
            color: var(--primary);
            transition: transform .3s ease;
        }
        .faq-item[open] summary i {
            transform: rotate(180deg);
        }
        .faq-item summary:hover {
            background: var(--primary-light);
        }
        .faq-item .faq-answer {
            padding: 0 28px 24px;
            color: var(--text-weak);
            font-size: 15px;
            line-height: 1.8;
            border-top: 1px solid var(--border);
            padding-top: 16px;
        }

        /* CTA */
        .cta-section {
            position: relative;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            text-align: center;
            color: #fff;
            padding: 100px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.88), rgba(124, 58, 237, 0.85));
        }
        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-content p {
            font-size: 17px;
            opacity: 0.92;
            margin-bottom: 32px;
        }
        .cta-content .btn {
            background: #fff;
            color: var(--primary);
            font-size: 16px;
            padding: 14px 36px;
        }
        .cta-content .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
        }

        /* Footer */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 64px 0 24px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            margin-bottom: 16px;
        }
        .footer-brand .logo-text {
            color: #fff;
        }
        .footer-brand .logo-text span {
            color: #94a3b8;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            max-width: 340px;
        }
        .footer-links {
            display: flex;
            gap: 40px;
        }
        .footer-links h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-links a {
            display: block;
            font-size: 14px;
            color: #94a3b8;
            padding: 6px 0;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 6px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: #64748b;
        }

        /* Mobile */
        @media (max-width: 1024px) {
            .header-inner {
                gap: 12px;
            }
            .main-nav {
                gap: 20px;
            }
            .search-box input {
                width: 140px;
            }
            .search-box input:focus {
                width: 160px;
            }
            .category-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
                height: auto;
                padding: 12px 0;
            }
            .main-nav {
                order: 3;
                width: 100%;
                overflow-x: auto;
                gap: 20px;
                padding-bottom: 6px;
            }
            .header-actions {
                margin-left: auto;
            }
            .search-box {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .hero-content h1 {
                font-size: 36px;
            }
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .intro-image img {
                height: 300px;
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .footer-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-links {
                gap: 24px;
            }
            .section {
                padding: 64px 0;
            }
        }
        @media (max-width: 520px) {
            .header-inner {
                flex-wrap: nowrap;
            }
            .header-actions .btn-primary {
                display: none;
            }
            .logo-text {
                font-size: 18px;
            }
            .hero-content h1 {
                font-size: 30px;
            }
            .hero-content p {
                font-size: 16px;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
            }
        }

/* roulang page: article */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #eff6ff;
    --accent: #f59e0b;
    --text-main: #0f172a;
    --text-body: #334155;
    --text-weak: #64748b;
    --bg-soft: #f8fafc;
    --border-soft: #e2e8f0;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, .05);
    --shadow-md: 0 4px 20px rgba(15, 23, 42, .08);
    --shadow-lg: 0 12px 40px rgba(15, 23, 42, .12);
    --transition: all .3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: var(--text-main);
    background: #fff;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

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

input,
textarea {
    font-family: inherit;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Header ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, .94);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border-soft);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    height: 74px;
}

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

.logo-icon {
    width: 44px;
    height: 44px;
    border-radius: 13px;
    background: linear-gradient(135deg, #2563eb, #1e40af);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 19px;
    box-shadow: 0 4px 14px rgba(37, 99, 235, .32);
}

.logo-text {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1.2;
    letter-spacing: .5px;
}

.logo-text span {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-weak);
    letter-spacing: 1px;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-link {
    padding: 9px 20px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
    transition: var(--transition);
    white-space: nowrap;
}

.nav-link:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.nav-link.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(37, 99, 235, .32);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box input {
    width: 210px;
    height: 40px;
    border: 1px solid var(--border-soft);
    border-radius: 999px;
    padding: 0 44px 0 18px;
    font-size: 14px;
    background: var(--bg-soft);
    outline: none;
    transition: var(--transition);
    color: var(--text-main);
}

.search-box input:focus {
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, .1);
}

.search-box i {
    position: absolute;
    right: 16px;
    color: var(--text-weak);
    font-size: 14px;
    pointer-events: none;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 26px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 700;
    border: 2px solid transparent;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(37, 99, 235, .3);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 22px rgba(37, 99, 235, .4);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-light:hover {
    background: rgba(255, 255, 255, .9);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, .15);
}

.btn-outline-light {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, .6);
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, .15);
    border-color: #fff;
    transform: translateY(-2px);
}

.nav-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border-radius: 12px;
    border: 1px solid var(--border-soft);
    background: var(--bg-soft);
    color: var(--text-main);
    font-size: 18px;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

.mobile-menu {
    display: none;
    background: #fff;
    border-top: 1px solid var(--border-soft);
    padding: 16px 24px 24px;
    box-shadow: var(--shadow-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease;
}

.mobile-menu.open {
    max-height: 500px;
}

.mobile-menu a {
    display: block;
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
    transition: var(--transition);
}

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

.mobile-menu .mobile-menu-cta {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--border-soft);
}

/* ===== 文章 Banner ===== */
.article-banner {
    position: relative;
    padding: 80px 0 96px;
    background-size: cover;
    background-position: center;
    color: #fff;
    text-align: center;
}

.article-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(15, 23, 42, .65) 0%, rgba(15, 23, 42, .82) 100%);
}

.article-banner .container {
    position: relative;
    z-index: 1;
    max-width: 860px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 13px;
    color: rgba(255, 255, 255, .75);
    margin-bottom: 22px;
    flex-wrap: wrap;
}

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

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

.breadcrumb .sep {
    color: rgba(255, 255, 255, .4);
}

.article-title {
    font-size: 40px;
    font-weight: 900;
    line-height: 1.25;
    margin-bottom: 20px;
    letter-spacing: .5px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, .2);
}

.article-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    font-size: 14px;
    color: rgba(255, 255, 255, .85);
    flex-wrap: wrap;
}

.meta-item {
    display: inline-flex;
    align-items: center;
    gap: 7px;
}

.meta-item i {
    font-size: 13px;
    color: rgba(255, 255, 255, .6);
}

/* ===== 正文区 ===== */
.article-main {
    padding: 48px 0 64px;
    background: var(--bg-soft);
}

.article-card {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 48px 56px;
    margin: 0 auto;
    max-width: 900px;
    border: 1px solid rgba(226, 232, 240, .6);
}

.article-content {
    font-size: 16px;
    line-height: 1.9;
    color: var(--text-body);
}

.article-content h2 {
    font-size: 1.7rem;
    font-weight: 800;
    margin: 2.4rem 0 1rem;
    color: var(--text-main);
    line-height: 1.35;
}

.article-content h3 {
    font-size: 1.35rem;
    font-weight: 700;
    margin: 2rem 0 .8rem;
    color: var(--text-main);
}

.article-content h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin: 1.6rem 0 .6rem;
    color: var(--text-main);
}

.article-content p {
    margin-bottom: 1.25rem;
    line-height: 1.9;
}

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

.article-content ul li,
.article-content ol li {
    margin-bottom: .55rem;
    padding-left: 4px;
}

.article-content ul li::marker {
    color: var(--primary);
}

.article-content ol li::marker {
    color: var(--primary);
    font-weight: 700;
}

.article-content img {
    border-radius: var(--radius-md);
    margin: 1.75rem auto;
    box-shadow: var(--shadow-md);
}

.article-content blockquote {
    border-left: 4px solid var(--primary);
    background: var(--primary-light);
    padding: 1.1rem 1.5rem;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin: 1.75rem 0;
    font-style: italic;
    color: var(--text-body);
}

.article-content a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 3px;
}

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

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.75rem 0;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.article-content th {
    background: var(--primary-light);
    padding: 12px 16px;
    text-align: left;
    font-weight: 700;
    color: var(--text-main);
    border: 1px solid var(--border-soft);
}

.article-content td {
    padding: 10px 16px;
    border: 1px solid var(--border-soft);
}

.article-tags {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-soft);
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}

.tag-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-soft);
    border: 1px solid var(--border-soft);
    border-radius: 999px;
    padding: 6px 14px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-weak);
    transition: var(--transition);
}

.tag-chip:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary);
}

.not-found-card {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 72px 40px;
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    border: 1px solid var(--border-soft);
}

.not-found-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    border-radius: 50%;
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 34px;
    color: var(--primary);
}

.not-found-card h2 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 12px;
}

.not-found-card p {
    color: var(--text-weak);
    margin-bottom: 28px;
}

/* ===== 相关推荐 ===== */
.related-section {
    padding: 88px 0;
    background: #fff;
}

.section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 52px;
}

.section-label {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    padding: 6px 16px;
    border-radius: 999px;
    letter-spacing: 1px;
    margin-bottom: 14px;
}

.section-head h2 {
    font-size: 34px;
    font-weight: 900;
    line-height: 1.3;
    margin-bottom: 14px;
    color: var(--text-main);
}

.section-head p {
    font-size: 16px;
    color: var(--text-weak);
    line-height: 1.7;
}

.section-head.light {
    color: #fff;
}

.section-head.light h2 {
    color: #fff;
}

.section-head.light p {
    color: rgba(255, 255, 255, .8);
}

.section-head.light .section-label {
    background: rgba(255, 255, 255, .15);
    color: #fff;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.content-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-soft);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.content-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(37, 99, 235, .2);
}

.card-thumb {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: var(--bg-soft);
}

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

.content-card:hover .card-thumb img {
    transform: scale(1.05);
}

.card-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(37, 99, 235, .92);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    padding: 5px 14px;
    border-radius: 999px;
    letter-spacing: .5px;
    box-shadow: 0 4px 12px rgba(37, 99, 235, .3);
    backdrop-filter: blur(4px);
}

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

.card-body h3 {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.45;
    margin-bottom: 10px;
    color: var(--text-main);
    transition: var(--transition);
}

.content-card:hover .card-body h3 {
    color: var(--primary);
}

.card-body p {
    font-size: 14px;
    color: var(--text-weak);
    line-height: 1.7;
    flex: 1;
    margin-bottom: 16px;
}

.card-link {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.card-link i {
    transition: transform .3s ease;
    font-size: 12px;
}

.content-card:hover .card-link i {
    transform: translateX(4px);
}

/* ===== 平台特色 ===== */
.features-section {
    position: relative;
    padding: 88px 0;
    background-size: cover;
    background-position: center;
}

.features-section .overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, .88), rgba(29, 78, 216, .82));
}

.features-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-item {
    background: rgba(255, 255, 255, .1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, .18);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    text-align: center;
    transition: var(--transition);
}

.feature-item:hover {
    background: rgba(255, 255, 255, .18);
    transform: translateY(-5px);
    border-color: rgba(255, 255, 255, .3);
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 18px;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(255, 255, 255, .2), rgba(255, 255, 255, .1));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, .2);
}

.feature-item h3 {
    color: #fff;
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 10px;
}

.feature-item p {
    color: rgba(255, 255, 255, .8);
    font-size: 14px;
    line-height: 1.7;
}

/* ===== FAQ ===== */
.faq-section {
    padding: 88px 0;
    background: var(--bg-soft);
}

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

.faq-item {
    background: #fff;
    border-radius: var(--radius-md);
    margin-bottom: 14px;
    border: 1px solid var(--border-soft);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item.open {
    border-color: rgba(37, 99, 235, .3);
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 26px;
    background: #fff;
    border: none;
    font-size: 16px;
    font-weight: 700;
    color: var(--text-main);
    text-align: left;
    transition: var(--transition);
}

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

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

.faq-item.open .faq-question i {
    transform: rotate(180deg);
    color: var(--primary);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .35s ease;
    padding: 0 26px;
}

.faq-item.open .faq-answer {
    padding: 0 26px 22px;
}

.faq-answer p {
    font-size: 15px;
    color: var(--text-body);
    line-height: 1.8;
    border-top: 1px solid var(--border-soft);
    padding-top: 18px;
}

/* ===== CTA ===== */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #1e40af, #2563eb);
}

.cta-box {
    text-align: center;
    max-width: 680px;
    margin: 0 auto;
}

.cta-box h2 {
    font-size: 34px;
    font-weight: 900;
    color: #fff;
    margin-bottom: 16px;
    line-height: 1.3;
}

.cta-box p {
    font-size: 17px;
    color: rgba(255, 255, 255, .85);
    margin-bottom: 32px;
    line-height: 1.7;
}

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

/* ===== Footer ===== */
.site-footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 64px 0 0;
}

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

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

.footer-brand .logo-text {
    color: #fff;
}

.footer-brand .logo-text span {
    color: #64748b;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    max-width: 340px;
}

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

.footer-links h4 {
    color: #e2e8f0;
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 18px;
}

.footer-links a {
    display: block;
    font-size: 14px;
    color: #94a3b8;
    padding: 6px 0;
    transition: var(--transition);
}

.footer-links a:hover {
    color: #fff;
    padding-left: 6px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, .08);
    padding: 22px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    font-size: 13px;
    color: #64748b;
    flex-wrap: wrap;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .search-box input {
        width: 170px;
    }
}

@media (max-width: 768px) {
    .header-inner {
        height: 64px;
    }
    .main-nav {
        display: none;
    }
    .header-actions .search-box {
        display: none;
    }
    .header-actions .btn-primary {
        display: none;
    }
    .nav-toggle {
        display: flex;
    }
    .mobile-menu {
        display: block;
    }
    .article-title {
        font-size: 28px;
    }
    .article-banner {
        padding: 60px 0 72px;
    }
    .article-card {
        padding: 28px 24px;
        border-radius: var(--radius-md);
    }
    .related-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .footer-inner {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .footer-links {
        grid-template-columns: 1fr 1fr;
    }
    .cta-box h2 {
        font-size: 26px;
    }
    .section-head h2 {
        font-size: 26px;
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 520px) {
    .container {
        padding: 0 16px;
    }
    .article-meta {
        gap: 12px;
        flex-direction: column;
    }
    .related-grid {
        grid-template-columns: 1fr;
    }
    .faq-question {
        font-size: 15px;
        padding: 18px 20px;
    }
    .faq-answer {
        padding: 0 20px;
    }
    .faq-item.open .faq-answer {
        padding: 0 20px 18px;
    }
    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }
    .cta-buttons .btn {
        width: 100%;
    }
    .article-card {
        padding: 22px 16px;
    }
    .logo-text {
        font-size: 17px;
    }
    .logo-icon {
        width: 38px;
        height: 38px;
        font-size: 16px;
        border-radius: 10px;
    }
}

/* 焦点状态提升可访问性 */
a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 3px solid rgba(37, 99, 235, .5);
    outline-offset: 3px;
    border-radius: 4px;
}