/* roulang page: index */
/* ===== 设计变量 ===== */
    :root {
        --color-primary: #7c3aed;
        --color-primary-light: #a78bfa;
        --color-primary-dark: #5b21b6;
        --color-secondary: #f59e0b;
        --color-secondary-light: #fbbf24;
        --color-accent: #ec4899;
        --color-bg: #0f0f1a;
        --color-bg-alt: #1a1a2e;
        --color-bg-card: #1e1e36;
        --color-bg-elevated: #252546;
        --color-text: #f1f5f9;
        --color-text-muted: #94a3b8;
        --color-text-soft: #cbd5e1;
        --color-border: #2d2d52;
        --color-border-light: #3d3d6b;
        --radius-sm: 8px;
        --radius-md: 16px;
        --radius-lg: 24px;
        --radius-xl: 32px;
        --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
        --shadow-glow: 0 0 30px rgba(124, 58, 237, 0.3);
        --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        --spacing-xs: 0.25rem;
        --spacing-sm: 0.5rem;
        --spacing-md: 1rem;
        --spacing-lg: 2rem;
        --spacing-xl: 4rem;
        --spacing-2xl: 6rem;
        --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* ===== 基础 Reset ===== */
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
    }
    body {
        font-family: var(--font-sans);
        font-size: 16px;
        line-height: 1.7;
        color: var(--color-text);
        background-color: var(--color-bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    a {
        color: var(--color-primary-light);
        text-decoration: none;
        transition: color var(--transition);
    }
    a:hover,
    a:focus-visible {
        color: var(--color-secondary-light);
    }
    a:focus-visible {
        outline: 2px solid var(--color-secondary);
        outline-offset: 2px;
        border-radius: 4px;
    }
    button,
    input,
    select,
    textarea {
        font-family: inherit;
        font-size: inherit;
        line-height: inherit;
    }
    button {
        cursor: pointer;
        border: none;
        background: none;
    }
    ul,
    ol {
        list-style: none;
    }
    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        line-height: 1.25;
        font-weight: 700;
        color: var(--color-text);
    }
    h1 {
        font-size: 3rem;
    }
    h2 {
        font-size: 2.25rem;
        margin-bottom: var(--spacing-lg);
    }
    h3 {
        font-size: 1.5rem;
    }
    h4 {
        font-size: 1.25rem;
    }
    p {
        margin-bottom: var(--spacing-md);
        color: var(--color-text-soft);
    }
    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 var(--spacing-lg);
    }
    .section {
        padding: var(--spacing-2xl) 0;
    }
    .section-title {
        text-align: center;
        margin-bottom: var(--spacing-xl);
        position: relative;
    }
    .section-title h2 {
        margin-bottom: var(--spacing-sm);
    }
    .section-title p {
        max-width: 600px;
        margin: 0 auto;
        color: var(--color-text-muted);
        font-size: 1.1rem;
    }
    .section-title::after {
        content: '';
        display: block;
        width: 60px;
        height: 4px;
        background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
        border-radius: 4px;
        margin: var(--spacing-md) auto 0;
    }
    .text-gradient {
        background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .btn {
        display: inline-flex;
        align-items: center;
        gap: var(--spacing-sm);
        padding: 12px 28px;
        border-radius: var(--radius-sm);
        font-weight: 600;
        font-size: 1rem;
        transition: all var(--transition);
        border: 2px solid transparent;
        text-align: center;
        justify-content: center;
    }
    .btn-primary {
        background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
        color: #fff;
        border-color: var(--color-primary);
        box-shadow: 0 4px 16px rgba(124, 58, 237, 0.4);
    }
    .btn-primary:hover,
    .btn-primary:focus-visible {
        background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
        box-shadow: 0 8px 28px rgba(124, 58, 237, 0.6);
        transform: translateY(-2px);
        color: #fff;
    }
    .btn-primary:active {
        transform: translateY(0);
        box-shadow: 0 2px 8px rgba(124, 58, 237, 0.3);
    }
    .btn-secondary {
        background: transparent;
        color: var(--color-text);
        border-color: var(--color-border-light);
    }
    .btn-secondary:hover,
    .btn-secondary:focus-visible {
        background: rgba(255, 255, 255, 0.05);
        border-color: var(--color-primary-light);
        color: var(--color-primary-light);
        transform: translateY(-2px);
    }
    .btn-secondary:active {
        transform: translateY(0);
    }
    .btn-lg {
        padding: 16px 36px;
        font-size: 1.1rem;
        border-radius: var(--radius-md);
    }
    .badge {
        display: inline-block;
        padding: 4px 14px;
        border-radius: 50px;
        font-size: 0.8rem;
        font-weight: 600;
        letter-spacing: 0.3px;
        background: rgba(124, 58, 237, 0.2);
        color: var(--color-primary-light);
        border: 1px solid rgba(124, 58, 237, 0.3);
    }
    .badge-hot {
        background: rgba(239, 68, 68, 0.2);
        color: #f87171;
        border-color: rgba(239, 68, 68, 0.3);
    }
    .badge-new {
        background: rgba(16, 185, 129, 0.2);
        color: #34d399;
        border-color: rgba(16, 185, 129, 0.3);
    }
    .card {
        background: var(--color-bg-card);
        border-radius: var(--radius-md);
        overflow: hidden;
        transition: all var(--transition);
        border: 1px solid var(--color-border);
    }
    .card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-lg);
        border-color: var(--color-border-light);
    }
    .card-img {
        width: 100%;
        aspect-ratio: 16/9;
        object-fit: cover;
    }
    .card-body {
        padding: var(--spacing-lg);
    }
    .card-body h3 {
        margin-bottom: var(--spacing-sm);
        font-size: 1.2rem;
    }
    .card-body p {
        font-size: 0.95rem;
        color: var(--color-text-muted);
        margin-bottom: var(--spacing-sm);
    }
    .card-meta {
        display: flex;
        align-items: center;
        gap: var(--spacing-md);
        font-size: 0.85rem;
        color: var(--color-text-muted);
        margin-top: var(--spacing-sm);
    }
    .card-meta i {
        margin-right: 4px;
    }
    .grid-2 {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    .grid-3 {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-lg);
    }
    .grid-4 {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-lg);
    }

    /* ===== 导航 ===== */
    .site-header {
        background: rgba(15, 15, 26, 0.92);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--color-border);
        position: sticky;
        top: 0;
        z-index: 100;
    }
    .header-inner {
        display: flex;
        flex-direction: column;
        padding: 0 var(--spacing-lg);
        max-width: 1200px;
        margin: 0 auto;
    }
    .header-top {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px 0;
        border-bottom: 1px solid var(--color-border);
    }
    .logo {
        font-size: 1.5rem;
        font-weight: 800;
        color: var(--color-text);
        display: flex;
        align-items: center;
        gap: 10px;
        letter-spacing: -0.5px;
    }
    .logo i {
        color: var(--color-secondary);
        font-size: 1.3rem;
    }
    .logo span {
        background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .logo:hover {
        color: var(--color-text);
    }
    .header-actions {
        display: flex;
        align-items: center;
        gap: var(--spacing-md);
    }
    .header-actions .search-box {
        display: flex;
        align-items: center;
        background: var(--color-bg-alt);
        border: 1px solid var(--color-border);
        border-radius: 50px;
        padding: 6px 16px;
        transition: all var(--transition);
    }
    .header-actions .search-box:focus-within {
        border-color: var(--color-primary);
        box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
    }
    .header-actions .search-box input {
        background: none;
        border: none;
        color: var(--color-text);
        padding: 6px 0;
        width: 160px;
        outline: none;
        font-size: 0.9rem;
    }
    .header-actions .search-box input::placeholder {
        color: var(--color-text-muted);
    }
    .header-actions .search-box button {
        color: var(--color-text-muted);
        padding: 4px 8px;
        font-size: 0.95rem;
        transition: color var(--transition);
    }
    .header-actions .search-box button:hover {
        color: var(--color-primary-light);
    }
    .nav-bar {
        display: flex;
        align-items: center;
        gap: var(--spacing-xs);
        padding: 8px 0;
        overflow-x: auto;
        scrollbar-width: none;
    }
    .nav-bar::-webkit-scrollbar {
        display: none;
    }
    .nav-bar a {
        display: flex;
        align-items: center;
        gap: 6px;
        padding: 8px 18px;
        border-radius: 50px;
        font-size: 0.9rem;
        font-weight: 500;
        color: var(--color-text-soft);
        white-space: nowrap;
        transition: all var(--transition);
        border: 1px solid transparent;
    }
    .nav-bar a i {
        font-size: 0.85rem;
    }
    .nav-bar a:hover {
        color: var(--color-text);
        background: rgba(255, 255, 255, 0.04);
        border-color: var(--color-border-light);
    }
    .nav-bar a.active {
        color: #fff;
        background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
        border-color: transparent;
        box-shadow: 0 4px 16px rgba(124, 58, 237, 0.35);
    }
    .mobile-menu-toggle {
        display: none;
        background: none;
        border: none;
        color: var(--color-text);
        font-size: 1.4rem;
        padding: 4px 8px;
        border-radius: var(--radius-sm);
        transition: background var(--transition);
    }
    .mobile-menu-toggle:hover {
        background: rgba(255, 255, 255, 0.05);
    }

    /* ===== Hero ===== */
    .hero {
        position: relative;
        min-height: 85vh;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        padding: var(--spacing-2xl) var(--spacing-lg);
        overflow: hidden;
        background: var(--color-bg);
    }
    .hero-bg {
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        opacity: 0.3;
        z-index: 0;
    }
    .hero-bg::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, rgba(15, 15, 26, 0.7) 0%, rgba(15, 15, 26, 0.9) 50%, var(--color-bg) 100%);
    }
    .hero-content {
        position: relative;
        z-index: 1;
        max-width: 820px;
    }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 8px 20px;
        border-radius: 50px;
        background: rgba(124, 58, 237, 0.15);
        border: 1px solid rgba(124, 58, 237, 0.25);
        color: var(--color-primary-light);
        font-size: 0.9rem;
        font-weight: 600;
        margin-bottom: var(--spacing-lg);
    }
    .hero-badge i {
        font-size: 0.8rem;
    }
    .hero h1 {
        font-size: 3.8rem;
        font-weight: 900;
        line-height: 1.15;
        margin-bottom: var(--spacing-md);
        letter-spacing: -1px;
    }
    .hero h1 .highlight {
        background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary), var(--color-accent));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .hero p {
        font-size: 1.25rem;
        color: var(--color-text-soft);
        max-width: 600px;
        margin: 0 auto var(--spacing-lg);
        line-height: 1.8;
    }
    .hero-actions {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: var(--spacing-md);
        flex-wrap: wrap;
    }
    .hero-stats {
        display: flex;
        justify-content: center;
        gap: var(--spacing-xl);
        margin-top: var(--spacing-xl);
        flex-wrap: wrap;
    }
    .hero-stat {
        text-align: center;
    }
    .hero-stat .num {
        font-size: 2.2rem;
        font-weight: 800;
        color: var(--color-text);
        display: block;
        line-height: 1.2;
    }
    .hero-stat .num i {
        color: var(--color-secondary);
        margin-right: 4px;
        font-size: 1.6rem;
    }
    .hero-stat .label {
        font-size: 0.9rem;
        color: var(--color-text-muted);
        margin-top: 4px;
    }

    /* ===== 特色板块 ===== */
    .features {
        background: var(--color-bg-alt);
    }
    .features .grid-3 {
        gap: var(--spacing-lg);
    }
    .feature-card {
        background: var(--color-bg-card);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        padding: var(--spacing-xl) var(--spacing-lg);
        text-align: center;
        transition: all var(--transition);
    }
    .feature-card:hover {
        border-color: var(--color-primary);
        box-shadow: var(--shadow-glow);
        transform: translateY(-4px);
    }
    .feature-icon {
        width: 60px;
        height: 60px;
        border-radius: var(--radius-md);
        background: linear-gradient(135deg, rgba(124, 58, 237, 0.2), rgba(245, 158, 11, 0.15));
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto var(--spacing-md);
        font-size: 1.8rem;
        color: var(--color-secondary);
    }
    .feature-card h3 {
        margin-bottom: var(--spacing-sm);
    }
    .feature-card p {
        font-size: 0.95rem;
        color: var(--color-text-muted);
        margin-bottom: 0;
    }

    /* ===== 分类入口 ===== */
    .categories .grid-3 {
        gap: var(--spacing-lg);
    }
    .cat-card {
        position: relative;
        border-radius: var(--radius-md);
        overflow: hidden;
        background: var(--color-bg-card);
        border: 1px solid var(--color-border);
        transition: all var(--transition);
        display: block;
        color: var(--color-text);
    }
    .cat-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-lg);
        border-color: var(--color-primary);
        color: var(--color-text);
    }
    .cat-card img {
        width: 100%;
        aspect-ratio: 16/9;
        object-fit: cover;
    }
    .cat-card .overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(0deg, rgba(15, 15, 26, 0.85) 0%, rgba(15, 15, 26, 0.2) 100%);
        display: flex;
        flex-direction: column;
        justify-content: flex-end;
        padding: var(--spacing-lg);
    }
    .cat-card .overlay h3 {
        font-size: 1.3rem;
        margin-bottom: 4px;
        color: #fff;
    }
    .cat-card .overlay p {
        font-size: 0.9rem;
        color: rgba(255, 255, 255, 0.7);
        margin-bottom: 0;
    }
    .cat-card .overlay .badge {
        align-self: flex-start;
        margin-bottom: var(--spacing-sm);
    }

    /* ===== 最新资讯 (CMS列表) ===== */
    .latest-news {
        background: var(--color-bg-alt);
    }
    .news-list {
        display: grid;
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        max-width: 800px;
        margin: 0 auto;
    }
    .news-item {
        display: flex;
        align-items: flex-start;
        gap: var(--spacing-lg);
        background: var(--color-bg-card);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        padding: var(--spacing-lg);
        transition: all var(--transition);
    }
    .news-item:hover {
        border-color: var(--color-border-light);
        box-shadow: var(--shadow-md);
        transform: translateX(4px);
    }
    .news-item .thumb {
        width: 120px;
        height: 80px;
        border-radius: var(--radius-sm);
        object-fit: cover;
        flex-shrink: 0;
        background: var(--color-bg-elevated);
    }
    .news-item .info {
        flex: 1;
        min-width: 0;
    }
    .news-item .info h3 {
        font-size: 1.1rem;
        margin-bottom: 4px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-item .info h3 a {
        color: var(--color-text);
    }
    .news-item .info h3 a:hover {
        color: var(--color-primary-light);
    }
    .news-item .info .summary {
        font-size: 0.9rem;
        color: var(--color-text-muted);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 6px;
    }
    .news-item .info .meta {
        display: flex;
        align-items: center;
        gap: var(--spacing-md);
        font-size: 0.82rem;
        color: var(--color-text-muted);
    }
    .news-item .info .meta i {
        margin-right: 4px;
    }
    .empty-news {
        text-align: center;
        padding: var(--spacing-xl);
        color: var(--color-text-muted);
        background: var(--color-bg-card);
        border-radius: var(--radius-md);
        border: 1px dashed var(--color-border);
    }
    .empty-news i {
        font-size: 2.5rem;
        margin-bottom: var(--spacing-md);
        display: block;
        color: var(--color-border-light);
    }

    /* ===== 流程板块 ===== */
    .process .steps {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-lg);
        counter-reset: step;
    }
    .step-card {
        text-align: center;
        position: relative;
        padding: var(--spacing-lg);
        background: var(--color-bg-card);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        transition: all var(--transition);
    }
    .step-card:hover {
        border-color: var(--color-primary);
        box-shadow: var(--shadow-glow);
    }
    .step-card .step-num {
        width: 48px;
        height: 48px;
        border-radius: 50%;
        background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto var(--spacing-md);
        font-size: 1.3rem;
        font-weight: 800;
        color: #fff;
    }
    .step-card h4 {
        margin-bottom: 6px;
        font-size: 1.1rem;
    }
    .step-card p {
        font-size: 0.9rem;
        color: var(--color-text-muted);
        margin-bottom: 0;
    }
    .step-card::after {
        content: '\f054';
        font-family: 'Font Awesome 6 Free';
        font-weight: 900;
        position: absolute;
        right: -18px;
        top: 50%;
        transform: translateY(-50%);
        color: var(--color-border-light);
        font-size: 1rem;
    }
    .step-card:last-child::after {
        display: none;
    }

    /* ===== FAQ ===== */
    .faq {
        background: var(--color-bg-alt);
    }
    .faq-list {
        max-width: 720px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    .faq-item {
        background: var(--color-bg-card);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-sm);
        overflow: hidden;
        transition: all var(--transition);
    }
    .faq-item:hover {
        border-color: var(--color-border-light);
    }
    .faq-question {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: var(--spacing-md) var(--spacing-lg);
        font-weight: 600;
        font-size: 1.05rem;
        color: var(--color-text);
        text-align: left;
        transition: background var(--transition);
        gap: var(--spacing-md);
    }
    .faq-question:hover {
        background: rgba(255, 255, 255, 0.02);
    }
    .faq-question i {
        color: var(--color-primary-light);
        font-size: 0.9rem;
        transition: transform var(--transition);
        flex-shrink: 0;
    }
    .faq-item.active .faq-question i {
        transform: rotate(180deg);
    }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease, padding 0.3s ease;
        padding: 0 var(--spacing-lg);
    }
    .faq-item.active .faq-answer {
        max-height: 300px;
        padding: 0 var(--spacing-lg) var(--spacing-lg);
    }
    .faq-answer p {
        font-size: 0.95rem;
        color: var(--color-text-muted);
        margin-bottom: 0;
    }

    /* ===== CTA ===== */
    .cta {
        text-align: center;
        background: linear-gradient(135deg, var(--color-bg-alt), var(--color-bg-card));
        border-top: 1px solid var(--color-border);
        border-bottom: 1px solid var(--color-border);
    }
    .cta h2 {
        margin-bottom: var(--spacing-sm);
    }
    .cta p {
        max-width: 540px;
        margin: 0 auto var(--spacing-lg);
        font-size: 1.1rem;
    }
    .cta .btn-group {
        display: flex;
        justify-content: center;
        gap: var(--spacing-md);
        flex-wrap: wrap;
    }

    /* ===== 页脚 ===== */
    .site-footer {
        background: var(--color-bg-alt);
        border-top: 1px solid var(--color-border);
        padding: var(--spacing-xl) 0 var(--spacing-lg);
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: var(--spacing-xl);
        margin-bottom: var(--spacing-xl);
    }
    .footer-brand .logo {
        margin-bottom: var(--spacing-sm);
    }
    .footer-brand p {
        font-size: 0.9rem;
        color: var(--color-text-muted);
        max-width: 320px;
    }
    .footer-col h4 {
        font-size: 1rem;
        margin-bottom: var(--spacing-md);
        color: var(--color-text);
    }
    .footer-col ul li {
        margin-bottom: 8px;
    }
    .footer-col ul li a {
        font-size: 0.9rem;
        color: var(--color-text-muted);
        transition: color var(--transition);
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .footer-col ul li a:hover {
        color: var(--color-primary-light);
    }
    .footer-col ul li a i {
        font-size: 0.7rem;
        color: var(--color-border-light);
    }
    .footer-bottom {
        border-top: 1px solid var(--color-border);
        padding-top: var(--spacing-lg);
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: var(--spacing-md);
        font-size: 0.85rem;
        color: var(--color-text-muted);
    }
    .footer-bottom a {
        color: var(--color-text-muted);
    }
    .footer-bottom a:hover {
        color: var(--color-primary-light);
    }
    .footer-bottom .social-links {
        display: flex;
        gap: var(--spacing-md);
    }
    .footer-bottom .social-links a {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: var(--color-bg-card);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--color-text-muted);
        border: 1px solid var(--color-border);
        transition: all var(--transition);
    }
    .footer-bottom .social-links a:hover {
        color: var(--color-primary-light);
        border-color: var(--color-primary);
        background: rgba(124, 58, 237, 0.1);
        transform: translateY(-2px);
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-lg);
        }
        .process .steps {
            grid-template-columns: repeat(2, 1fr);
        }
        .step-card::after {
            display: none;
        }
        .hero h1 {
            font-size: 2.8rem;
        }
    }

    @media (max-width: 768px) {
        h1 {
            font-size: 2.2rem;
        }
        h2 {
            font-size: 1.8rem;
        }
        .section {
            padding: var(--spacing-xl) 0;
        }
        .header-top {
            padding: 10px 0;
        }
        .header-actions .search-box {
            display: none;
        }
        .mobile-menu-toggle {
            display: block;
        }
        .nav-bar {
            display: none;
            flex-direction: column;
            align-items: stretch;
            padding: var(--spacing-sm) 0 var(--spacing-md);
            gap: 2px;
        }
        .nav-bar.open {
            display: flex;
        }
        .nav-bar a {
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            justify-content: flex-start;
        }
        .nav-bar a.active {
            background: rgba(124, 58, 237, 0.15);
            color: var(--color-primary-light);
            border-color: transparent;
            box-shadow: none;
        }
        .hero {
            min-height: 70vh;
            padding: var(--spacing-xl) var(--spacing-md);
        }
        .hero h1 {
            font-size: 2.2rem;
        }
        .hero p {
            font-size: 1rem;
        }
        .hero-stats {
            gap: var(--spacing-lg);
        }
        .hero-stat .num {
            font-size: 1.6rem;
        }
        .grid-2,
        .grid-3,
        .grid-4 {
            grid-template-columns: 1fr;
        }
        .news-item {
            flex-direction: column;
        }
        .news-item .thumb {
            width: 100%;
            height: 160px;
        }
        .process .steps {
            grid-template-columns: 1fr;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: var(--spacing-lg);
        }
        .footer-bottom {
            flex-direction: column;
            text-align: center;
        }
        .cat-card .overlay h3 {
            font-size: 1.1rem;
        }
        .cta h2 {
            font-size: 1.6rem;
        }
        .section-title p {
            font-size: 0.95rem;
        }
    }

    @media (max-width: 520px) {
        .container {
            padding: 0 var(--spacing-md);
        }
        .hero h1 {
            font-size: 1.8rem;
        }
        .hero-actions {
            flex-direction: column;
            width: 100%;
        }
        .hero-actions .btn {
            width: 100%;
        }
        .hero-stats {
            flex-direction: column;
            align-items: center;
            gap: var(--spacing-md);
        }
        .btn-lg {
            padding: 14px 24px;
            font-size: 1rem;
        }
        .news-item .thumb {
            height: 120px;
        }
        .feature-card {
            padding: var(--spacing-lg) var(--spacing-md);
        }
        .faq-question {
            font-size: 0.95rem;
            padding: var(--spacing-md);
        }
    }

    @media (min-width: 769px) {
        .nav-bar {
            display: flex !important;
        }
        .mobile-menu-toggle {
            display: none !important;
        }
    }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #f59e0b;
            --primary-dark: #d97706;
            --primary-light: #fbbf24;
            --secondary: #1e293b;
            --secondary-light: #334155;
            --accent: #06b6d4;
            --bg: #0f172a;
            --bg-card: #1e293b;
            --bg-card-hover: #273548;
            --bg-section: #1a2332;
            --bg-section-alt: #0f172a;
            --text: #f1f5f9;
            --text-muted: #94a3b8;
            --text-weak: #64748b;
            --border: #334155;
            --border-light: #475569;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 16px 48px rgba(245, 158, 11, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --gap: 32px;
            --gap-sm: 20px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            transition: var(--transition);
        }

        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 var(--gap);
        }

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

        /* ===== Navigation ===== */
        .site-header {
            background: rgba(15, 23, 42, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 0;
        }

        .nav-bar {
            display: flex;
            align-items: center;
            gap: 8px;
            max-width: var(--container);
            margin: 0 auto;
            padding: 12px var(--gap);
            flex-wrap: wrap;
        }

        .nav-bar .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            margin-right: 32px;
            flex-shrink: 0;
        }

        .nav-bar .logo i {
            color: var(--primary);
            font-size: 26px;
        }

        .nav-bar .logo span {
            color: var(--primary);
        }

        .nav-bar a {
            color: var(--text-muted);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: 100px;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }

        .nav-bar a i {
            font-size: 14px;
        }

        .nav-bar a:hover {
            color: var(--text);
            background: rgba(245, 158, 11, 0.1);
        }

        .nav-bar a.active {
            color: #0f172a;
            background: var(--primary);
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.3);
        }

        .nav-bar a.active:hover {
            color: #0f172a;
            background: var(--primary-light);
        }

        .mobile-toggle {
            display: none;
            background: none;
            color: var(--text);
            font-size: 24px;
            padding: 8px 12px;
            border-radius: var(--radius-xs);
            cursor: pointer;
            margin-left: auto;
        }

        .mobile-toggle:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        @media (max-width: 768px) {
            .nav-bar {
                padding: 10px var(--gap-sm);
                gap: 4px;
            }

            .nav-bar .logo {
                font-size: 18px;
                margin-right: 12px;
            }

            .nav-bar .logo i {
                font-size: 20px;
            }

            .mobile-toggle {
                display: block;
            }

            .nav-links {
                display: none;
                width: 100%;
                flex-direction: column;
                padding: 12px 0 4px;
                gap: 4px;
            }

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

            .nav-links a {
                width: 100%;
                padding: 10px 16px;
                border-radius: var(--radius-sm);
            }

            .nav-links a.active {
                background: var(--primary);
                color: #0f172a;
            }
        }

        @media (max-width: 520px) {
            .nav-bar .logo {
                font-size: 16px;
                gap: 6px;
            }
            .nav-bar .logo i {
                font-size: 18px;
            }
            .nav-bar a {
                font-size: 14px;
                padding: 6px 14px;
            }
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            padding: 100px 0 90px;
            background: linear-gradient(135deg, #0f172a 0%, #1a2332 40%, #0f172a 100%);
            overflow: hidden;
            min-height: 420px;
            display: flex;
            align-items: center;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.2;
            z-index: 0;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(26, 35, 50, 0.7) 60%, rgba(15, 23, 42, 0.85) 100%);
            z-index: 1;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(245, 158, 11, 0.15);
            color: var(--primary);
            padding: 6px 20px;
            border-radius: 100px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 20px;
            border: 1px solid rgba(245, 158, 11, 0.25);
        }

        .category-hero .hero-badge i {
            font-size: 16px;
        }

        .category-hero h1 {
            font-size: 52px;
            font-weight: 900;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: -1px;
            text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }

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

        .category-hero p {
            font-size: 20px;
            color: var(--text-muted);
            max-width: 680px;
            margin: 0 auto 30px;
            line-height: 1.8;
        }

        .category-hero .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 16px;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            text-decoration: none;
            background: transparent;
        }

        .btn-primary {
            background: var(--primary);
            color: #0f172a;
            box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
        }

        .btn-primary:hover {
            background: var(--primary-light);
            color: #0f172a;
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(245, 158, 11, 0.4);
        }

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

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(245, 158, 11, 0.08);
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .category-hero {
                padding: 70px 0 60px;
                min-height: 320px;
            }
            .category-hero h1 {
                font-size: 34px;
            }
            .category-hero p {
                font-size: 17px;
            }
            .btn {
                padding: 12px 24px;
                font-size: 15px;
            }
        }

        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 28px;
            }
            .category-hero p {
                font-size: 15px;
            }
            .category-hero .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
        }

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

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

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

        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }

        .section-header h2 {
            font-size: 38px;
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }

        .section-header h2 i {
            color: var(--primary);
            margin-right: 8px;
        }

        .section-header p {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }

        .section-tag i {
            font-size: 16px;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 28px;
            }
            .section-header p {
                font-size: 16px;
            }
        }

        @media (max-width: 520px) {
            .section {
                padding: 40px 0;
            }
            .section-header h2 {
                font-size: 24px;
            }
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

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

        .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            border-radius: 0;
        }

        .card-body {
            padding: 24px 22px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .card-body .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(245, 158, 11, 0.12);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 100px;
            margin-bottom: 12px;
            width: fit-content;
            border: 1px solid rgba(245, 158, 11, 0.15);
        }

        .card-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .card-body h3 a {
            color: var(--text);
        }

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

        .card-body p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }

        .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-weak);
            border-top: 1px solid var(--border);
            padding-top: 14px;
            margin-top: auto;
        }

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

        .card-body .card-meta .card-btn {
            margin-left: auto;
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .card-body .card-meta .card-btn:hover {
            gap: 10px;
        }

        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--gap-sm);
            }
        }

        @media (max-width: 600px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
            .card-body {
                padding: 18px 16px 20px;
            }
            .card-body h3 {
                font-size: 18px;
            }
        }

        /* ===== Featured / Intro Section ===== */
        .intro-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .intro-block .intro-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            aspect-ratio: 4 / 3;
            object-fit: cover;
            width: 100%;
        }

        .intro-block .intro-content h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .intro-block .intro-content h2 span {
            color: var(--primary);
        }

        .intro-block .intro-content p {
            color: var(--text-muted);
            font-size: 17px;
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .intro-block .intro-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .intro-block .intro-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--text);
            font-size: 15px;
        }

        .intro-block .intro-list li i {
            color: var(--primary);
            font-size: 18px;
            margin-top: 3px;
            flex-shrink: 0;
        }

        @media (max-width: 900px) {
            .intro-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .intro-block .intro-image {
                aspect-ratio: 16 / 9;
            }
            .intro-block .intro-content h2 {
                font-size: 28px;
            }
        }

        @media (max-width: 520px) {
            .intro-block .intro-content h2 {
                font-size: 24px;
            }
            .intro-block .intro-content p {
                font-size: 15px;
            }
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
            text-align: center;
        }

        .stat-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 36px 20px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .stat-item:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .stat-item .stat-number {
            font-size: 44px;
            font-weight: 900;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-item .stat-label {
            font-size: 16px;
            color: var(--text-muted);
            font-weight: 500;
        }

        .stat-item i {
            font-size: 32px;
            color: var(--primary-light);
            margin-bottom: 12px;
            display: block;
            opacity: 0.7;
        }

        @media (max-width: 900px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 24px 14px;
            }
            .stat-item .stat-number {
                font-size: 32px;
            }
        }

        /* ===== Guides / Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
        }

        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 36px 28px 32px;
            border: 1px solid var(--border);
            position: relative;
            transition: var(--transition);
        }

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

        .step-card .step-number {
            font-size: 52px;
            font-weight: 900;
            color: rgba(245, 158, 11, 0.12);
            position: absolute;
            top: 12px;
            right: 20px;
            line-height: 1;
            user-select: none;
        }

        .step-card i {
            font-size: 36px;
            color: var(--primary);
            margin-bottom: 16px;
            display: inline-block;
        }

        .step-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }

        .step-card p {
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }

        @media (max-width: 900px) {
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 600px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .step-card {
                padding: 28px 20px 24px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }

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

        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 17px;
            color: var(--text);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
        }

        .faq-item .faq-question i {
            color: var(--primary);
            font-size: 18px;
            transition: transform 0.3s;
            flex-shrink: 0;
        }

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

        .faq-item .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.8;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        .faq-item .faq-answer a {
            color: var(--primary);
            text-decoration: underline;
        }

        @media (max-width: 600px) {
            .faq-item .faq-question {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-item .faq-answer {
                padding: 0 16px 16px;
                font-size: 14px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #1a2332 0%, #0f172a 50%, #1a2332 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.06;
            z-index: 0;
        }

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

        .cta-section h2 {
            font-size: 38px;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-section h2 span {
            color: var(--primary);
        }

        .cta-section p {
            font-size: 18px;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto 30px;
        }

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

        @media (max-width: 768px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 28px;
            }
            .cta-section p {
                font-size: 16px;
            }
        }

        @media (max-width: 520px) {
            .cta-section .cta-actions {
                flex-direction: column;
                align-items: center;
            }
            .cta-section .cta-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0a0f1a;
            border-top: 1px solid var(--border);
            padding: 60px 0 0;
            color: var(--text-muted);
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--gap);
            padding-bottom: 40px;
        }

        .site-footer .footer-brand .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 16px;
        }

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

        .site-footer .footer-brand .logo span {
            color: var(--primary);
        }

        .site-footer .footer-brand p {
            font-size: 15px;
            line-height: 1.8;
            max-width: 360px;
        }

        .site-footer .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 18px;
        }

        .site-footer .footer-col ul li {
            margin-bottom: 10px;
        }

        .site-footer .footer-col ul li a {
            color: var(--text-muted);
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .site-footer .footer-col ul li a i {
            font-size: 10px;
            color: var(--primary);
        }

        .site-footer .footer-col ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 14px;
            color: var(--text-weak);
        }

        .site-footer .footer-bottom .social-links {
            display: flex;
            gap: 12px;
        }

        .site-footer .footer-bottom .social-links a {
            color: var(--text-weak);
            font-size: 20px;
            transition: var(--transition);
        }

        .site-footer .footer-bottom .social-links a:hover {
            color: var(--primary);
            transform: scale(1.15);
        }

        @media (max-width: 900px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .site-footer .footer-brand {
                grid-column: 1 / -1;
            }
            .site-footer .footer-brand p {
                max-width: 100%;
            }
        }

        @media (max-width: 520px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer .footer-brand .logo {
                font-size: 18px;
            }
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #0f172a;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
            cursor: pointer;
            transition: var(--transition);
            z-index: 999;
            border: none;
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
        }

        .back-top.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }

        .back-top:hover {
            background: var(--primary-light);
            transform: translateY(-4px);
            box-shadow: 0 8px 32px rgba(245, 158, 11, 0.4);
        }

        @media (max-width: 520px) {
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 18px;
            }
        }

        /* ===== Responsive Fine-tune ===== */
        @media (max-width: 1024px) {
            :root {
                --gap: 24px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --gap: 16px;
                --gap-sm: 12px;
            }
        }

/* roulang page: article */
:root {
  --primary: #e65100;
  --primary-light: #ff8a50;
  --primary-dark: #b23c00;
  --secondary: #ffb300;
  --accent: #ff6f00;
  --bg-body: #faf6f1;
  --bg-card: #ffffff;
  --bg-dark: #1e1e2a;
  --bg-soft: #fff3e0;
  --text-dark: #1a1a2e;
  --text-body: #3e3e4a;
  --text-muted: #7a7a8a;
  --text-light: #f5f0eb;
  --border-light: #ece4da;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 28px rgba(0,0,0,0.07);
  --shadow-lg: 0 20px 48px rgba(0,0,0,0.10);
  --font-sans: 'Segoe UI','PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --transition: all 0.25s ease;
}
*, *::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-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; padding: 0; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header & Brand */
.site-header {
  background: var(--bg-dark);
  position: sticky;
  top: 0;
  z-index: 1050;
  box-shadow: 0 2px 12px rgba(0,0,0,0.15);
}
.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
}
.header-top .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.6rem;
  font-weight: 700;
  color: #fff;
  transition: var(--transition);
}
.logo i { color: var(--secondary); font-size: 1.8rem; }
.logo span { color: var(--secondary); }
.logo:hover { color: var(--secondary); opacity: 0.9; }
.menu-toggle {
  background: none;
  border: 2px solid rgba(255,255,255,0.25);
  color: #fff;
  font-size: 1.5rem;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: none;
  transition: var(--transition);
}
.menu-toggle:hover { border-color: var(--secondary); color: var(--secondary); }

/* Nav bar */
.nav-bar {
  background: rgba(255,255,255,0.04);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}
.nav-bar .container {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding-top: 6px;
  padding-bottom: 6px;
}
.nav-bar a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.75);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
}
.nav-bar a i { font-size: 0.85rem; }
.nav-bar a:hover { background: rgba(255,255,255,0.10); color: #fff; }
.nav-bar a.active { background: var(--primary); color: #fff; box-shadow: 0 2px 10px rgba(230,81,0,0.35); }

/* Breadcrumb */
.breadcrumb-wrap {
  background: var(--bg-soft);
  padding: 10px 0;
  border-bottom: 1px solid var(--border-light);
}
.breadcrumb-wrap .breadcrumb {
  margin: 0;
  background: transparent;
  padding: 0;
  font-size: 0.9rem;
}
.breadcrumb-wrap .breadcrumb-item + .breadcrumb-item::before { content: "›"; color: var(--text-muted); }
.breadcrumb-wrap .breadcrumb-item a { color: var(--primary); }
.breadcrumb-wrap .breadcrumb-item.active { color: var(--text-muted); }

/* Hero Banner */
.article-hero {
  position: relative;
  min-height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, rgba(26,26,46,0.82) 0%, rgba(230,81,0,0.60) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  padding: 60px 20px;
  overflow: hidden;
}
.article-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(to top, var(--bg-body), transparent);
  pointer-events: none;
}
.article-hero .hero-inner {
  position: relative;
  z-index: 2;
  max-width: 800px;
}
.article-hero .hero-category {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 4px 18px;
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 18px;
  text-transform: uppercase;
}
.article-hero h1 {
  color: #fff;
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.25;
  text-shadow: 0 2px 12px rgba(0,0,0,0.25);
  margin-bottom: 16px;
}
.article-hero .hero-meta {
  color: rgba(255,255,255,0.80);
  font-size: 1rem;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.article-hero .hero-meta i { margin-right: 4px; opacity: 0.7; }

/* Article Main */
.article-main {
  padding: 40px 0 60px;
}
.article-body {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 40px 48px;
  margin-top: -40px;
  position: relative;
  z-index: 3;
}
.article-body .article-illustration {
  margin: 24px 0 32px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.article-body .article-illustration img {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
}
.article-body .article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text-body);
}
.article-body .article-content p {
  margin-bottom: 1.2rem;
}
.article-body .article-content h2,
.article-body .article-content h3 {
  margin-top: 2rem;
  margin-bottom: 0.8rem;
  color: var(--text-dark);
  font-weight: 700;
}
.article-body .article-content ul,
.article-body .article-content ol {
  margin-bottom: 1.2rem;
  padding-left: 1.6rem;
  list-style: disc;
}
.article-body .article-content li { margin-bottom: 0.4rem; }
.article-body .article-content blockquote {
  border-left: 4px solid var(--primary);
  background: var(--bg-soft);
  padding: 16px 24px;
  margin: 1.2rem 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-dark);
  font-style: italic;
}
.article-body .article-footer-info {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  margin-top: 32px;
  border-top: 1px solid var(--border-light);
  font-size: 0.9rem;
  color: var(--text-muted);
}
.article-body .article-footer-info .tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.article-body .article-footer-info .tags span {
  background: var(--bg-soft);
  color: var(--primary);
  padding: 2px 14px;
  border-radius: 30px;
  font-size: 0.8rem;
  font-weight: 500;
}
.article-body .not-found {
  text-align: center;
  padding: 60px 20px;
}
.article-body .not-found h2 {
  font-size: 2rem;
  color: var(--text-dark);
  margin-bottom: 12px;
}
.article-body .not-found p { color: var(--text-muted); margin-bottom: 24px; }
.article-body .not-found .btn-home {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 12px 36px;
  border-radius: 40px;
  font-weight: 600;
  transition: var(--transition);
}
.article-body .not-found .btn-home:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }

/* Related Section */
.related-section {
  padding: 60px 0 40px;
}
.related-section .section-title {
  text-align: center;
  margin-bottom: 36px;
}
.related-section .section-title h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-dark);
}
.related-section .section-title p {
  color: var(--text-muted);
  max-width: 540px;
  margin: 8px auto 0;
}
.related-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.related-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  border: 1px solid var(--border-light);
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.related-card .card-img {
  height: 160px;
  overflow: hidden;
}
.related-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.related-card:hover .card-img img { transform: scale(1.05); }
.related-card .card-body {
  padding: 18px 20px 20px;
}
.related-card .card-body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 6px;
  line-height: 1.4;
}
.related-card .card-body p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 12px;
}
.related-card .card-body .card-link {
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.related-card .card-body .card-link i { font-size: 0.75rem; transition: var(--transition); }
.related-card .card-body .card-link:hover i { transform: translateX(4px); }

/* FAQ */
.faq-section {
  background: var(--bg-card);
  padding: 60px 0;
  margin: 20px 0;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.faq-section .section-title {
  text-align: center;
  margin-bottom: 36px;
}
.faq-section .section-title h2 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-dark);
}
.faq-section .section-title p {
  color: var(--text-muted);
  max-width: 540px;
  margin: 8px auto 0;
}
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--primary-light); }
.faq-question {
  padding: 16px 24px;
  background: var(--bg-soft);
  font-weight: 600;
  color: var(--text-dark);
  cursor: default;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
}
.faq-question i { color: var(--primary); font-size: 1.1rem; }
.faq-answer {
  padding: 16px 24px 20px;
  color: var(--text-body);
  font-size: 0.95rem;
  line-height: 1.7;
  border-top: 1px solid var(--border-light);
}

/* CTA */
.cta-section {
  padding: 60px 0;
  text-align: center;
}
.cta-card {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--accent) 100%);
  border-radius: var(--radius-lg);
  padding: 52px 40px;
  color: #fff;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}
.cta-card::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: rgba(255,255,255,0.06);
  border-radius: 50%;
  pointer-events: none;
}
.cta-card h2 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
.cta-card p { font-size: 1.1rem; opacity: 0.92; margin-bottom: 28px; max-width: 600px; margin-left: auto; margin-right: auto; }
.cta-card .btn-cta {
  display: inline-block;
  background: #fff;
  color: var(--primary-dark);
  padding: 14px 44px;
  border-radius: 40px;
  font-weight: 700;
  font-size: 1.05rem;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}
.cta-card .btn-cta:hover { transform: translateY(-3px); box-shadow: 0 8px 28px rgba(0,0,0,0.25); color: var(--primary); }

/* Footer */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.75);
  padding: 50px 0 20px;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 32px;
}
.footer-brand .logo { font-size: 1.4rem; margin-bottom: 12px; display: inline-flex; }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 320px; }
.footer-col h4 { font-size: 1rem; font-weight: 600; color: #fff; margin-bottom: 14px; }
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { color: rgba(255,255,255,0.65); font-size: 0.9rem; display: inline-flex; align-items: center; gap: 6px; transition: var(--transition); }
.footer-col ul li a i { font-size: 0.65rem; color: var(--secondary); }
.footer-col ul li a:hover { color: var(--secondary); }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
}
.social-links { display: flex; gap: 14px; }
.social-links a { color: rgba(255,255,255,0.5); font-size: 1.3rem; transition: var(--transition); }
.social-links a:hover { color: var(--secondary); transform: translateY(-2px); }

/* Responsive */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .article-hero h1 { font-size: 2.2rem; }
  .article-body { padding: 32px 28px; }
}
@media (max-width: 768px) {
  .menu-toggle { display: block; }
  .nav-bar .container { flex-direction: column; gap: 4px; padding-top: 4px; padding-bottom: 10px; }
  .nav-bar a { width: 100%; justify-content: center; padding: 10px 0; }
  .article-hero { min-height: 240px; padding: 40px 16px; }
  .article-hero h1 { font-size: 1.8rem; }
  .article-hero .hero-meta { font-size: 0.9rem; gap: 12px; }
  .article-body { padding: 24px 16px; margin-top: -24px; border-radius: var(--radius-md); }
  .article-body .article-content { font-size: 1rem; }
  .related-cards { grid-template-columns: 1fr; }
  .faq-question { font-size: 0.95rem; padding: 14px 16px; }
  .faq-answer { padding: 14px 16px; }
  .cta-card { padding: 36px 20px; }
  .cta-card h2 { font-size: 1.5rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .article-body .article-footer-info { flex-direction: column; gap: 12px; align-items: flex-start; }
}
@media (max-width: 520px) {
  .article-hero h1 { font-size: 1.4rem; }
  .article-hero .hero-category { font-size: 0.75rem; padding: 2px 12px; }
  .article-body { padding: 16px 12px; }
  .logo { font-size: 1.2rem; }
  .logo i { font-size: 1.4rem; }
  .nav-bar a { font-size: 0.85rem; }
  .section-title h2 { font-size: 1.4rem; }
}