/* roulang page: index */
/* ============================================================
       :root 设计变量
       ============================================================ */
    :root {
        --primary: #4F46E5;
        --primary-light: #818CF8;
        --primary-dark: #3730A3;
        --primary-bg: #EEF2FF;
        --secondary: #EC4899;
        --secondary-light: #F472B6;
        --accent: #F59E0B;
        --accent-light: #FCD34D;
        --bg: #F8FAFC;
        --bg-card: #FFFFFF;
        --bg-dark: #0F172A;
        --bg-gray: #F1F5F9;
        --text: #1E293B;
        --text-light: #64748B;
        --text-lighter: #94A3B8;
        --text-white: #FFFFFF;
        --border: #E2E8F0;
        --border-light: #F1F5F9;
        --radius: 12px;
        --radius-sm: 8px;
        --radius-lg: 16px;
        --radius-xl: 24px;
        --shadow: 0 4px 20px rgba(0,0,0,0.06);
        --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
        --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
        --shadow-primary: 0 8px 32px rgba(79,70,229,0.25);
        --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
        --max-width: 1200px;
        --header-height: 72px;
    }

    /* ============================================================
       Reset & Base
       ============================================================ */
    *, *::before, *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    body {
        font-family: var(--font-sans);
        font-size: 16px;
        line-height: 1.7;
        color: var(--text);
        background-color: var(--bg);
        overflow-x: hidden;
    }
    a {
        color: var(--primary);
        text-decoration: none;
        transition: var(--transition);
    }
    a:hover {
        color: var(--primary-dark);
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    button, input, textarea, select {
        font-family: inherit;
        font-size: inherit;
        outline: none;
        transition: var(--transition);
    }
    button {
        cursor: pointer;
        border: none;
        background: none;
    }
    ul, ol {
        list-style: none;
    }
    h1, h2, h3, h4, h5, h6 {
        line-height: 1.3;
        font-weight: 700;
        color: var(--text);
    }
    h1 { font-size: 2.8rem; }
    h2 { font-size: 2.2rem; }
    h3 { font-size: 1.5rem; }
    h4 { font-size: 1.2rem; }
    p { margin-bottom: 1rem; }
    .container {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ============================================================
       导航 Header
       ============================================================ */
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        height: var(--header-height);
        background: rgba(255,255,255,0.92);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border);
        transition: var(--transition);
    }
    .header.scrolled {
        box-shadow: var(--shadow);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 1.35rem;
        font-weight: 800;
        color: var(--primary);
        letter-spacing: -0.5px;
    }
    .logo i {
        font-size: 1.6rem;
        color: var(--primary);
        background: var(--primary-bg);
        padding: 8px;
        border-radius: 10px;
    }
    .logo span {
        background: linear-gradient(135deg, var(--primary), var(--secondary));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .logo:hover span {
        background: linear-gradient(135deg, var(--primary-dark), var(--secondary));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .nav {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .nav a {
        display: flex;
        align-items: center;
        gap: 6px;
        padding: 8px 18px;
        border-radius: var(--radius-sm);
        font-size: 0.95rem;
        font-weight: 500;
        color: var(--text-light);
        transition: var(--transition);
        position: relative;
    }
    .nav a i {
        font-size: 0.9rem;
    }
    .nav a:hover {
        color: var(--primary);
        background: var(--primary-bg);
    }
    .nav a.active {
        color: var(--primary);
        background: var(--primary-bg);
        font-weight: 600;
    }
    .nav a.active::after {
        content: '';
        position: absolute;
        bottom: 2px;
        left: 50%;
        transform: translateX(-50%);
        width: 20px;
        height: 3px;
        background: var(--primary);
        border-radius: 4px;
    }
    .nav-cta {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 10px 24px;
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        color: var(--text-white) !important;
        border-radius: var(--radius-sm);
        font-weight: 600;
        font-size: 0.9rem;
        box-shadow: var(--shadow-primary);
        transition: var(--transition);
    }
    .nav-cta i {
        color: var(--text-white) !important;
    }
    .nav-cta:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 40px rgba(79,70,229,0.35);
        color: var(--text-white) !important;
        background: linear-gradient(135deg, var(--primary-dark), #312E81);
    }
    .nav-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        padding: 8px;
        cursor: pointer;
        background: none;
        border: none;
    }
    .nav-toggle span {
        width: 26px;
        height: 2.5px;
        background: var(--text);
        border-radius: 4px;
        transition: var(--transition);
    }
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    /* ============================================================
       Hero 首屏
       ============================================================ */
    .hero {
        position: relative;
        min-height: 86vh;
        display: flex;
        align-items: center;
        justify-content: center;
        background: linear-gradient(135deg, rgba(15,23,42,0.85), rgba(30,27,75,0.75)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        margin-top: var(--header-height);
        overflow: hidden;
    }
    .hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: radial-gradient(ellipse at 20% 50%, rgba(79,70,229,0.2) 0%, transparent 60%),
                    radial-gradient(ellipse at 80% 50%, rgba(236,72,153,0.15) 0%, transparent 60%);
        pointer-events: none;
    }
    .hero-content {
        position: relative;
        z-index: 2;
        text-align: center;
        max-width: 800px;
        padding: 60px 24px;
    }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 8px 20px;
        background: rgba(255,255,255,0.12);
        backdrop-filter: blur(8px);
        border: 1px solid rgba(255,255,255,0.18);
        border-radius: 50px;
        color: var(--text-white);
        font-size: 0.85rem;
        font-weight: 500;
        margin-bottom: 28px;
    }
    .hero-badge i {
        color: var(--accent-light);
    }
    .hero h1 {
        font-size: 3.6rem;
        font-weight: 800;
        color: var(--text-white);
        line-height: 1.15;
        margin-bottom: 20px;
        letter-spacing: -1px;
    }
    .hero h1 span {
        background: linear-gradient(135deg, #A78BFA, #F472B6);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .hero p {
        font-size: 1.2rem;
        color: rgba(255,255,255,0.8);
        max-width: 600px;
        margin: 0 auto 32px;
        line-height: 1.8;
    }
    .hero-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 16px;
        justify-content: center;
    }
    .btn-primary {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 14px 32px;
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        color: var(--text-white);
        border-radius: var(--radius-sm);
        font-weight: 600;
        font-size: 1rem;
        box-shadow: var(--shadow-primary);
        transition: var(--transition);
        border: none;
    }
    .btn-primary i {
        font-size: 0.95rem;
    }
    .btn-primary:hover {
        transform: translateY(-3px);
        box-shadow: 0 16px 48px rgba(79,70,229,0.4);
        color: var(--text-white);
    }
    .btn-outline-light {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 14px 32px;
        background: rgba(255,255,255,0.08);
        color: var(--text-white);
        border: 1.5px solid rgba(255,255,255,0.3);
        border-radius: var(--radius-sm);
        font-weight: 600;
        font-size: 1rem;
        transition: var(--transition);
    }
    .btn-outline-light i {
        font-size: 0.95rem;
    }
    .btn-outline-light:hover {
        background: rgba(255,255,255,0.18);
        border-color: rgba(255,255,255,0.5);
        color: var(--text-white);
        transform: translateY(-3px);
    }
    .hero-stats {
        display: flex;
        gap: 40px;
        justify-content: center;
        margin-top: 48px;
        flex-wrap: wrap;
    }
    .hero-stat {
        text-align: center;
        color: rgba(255,255,255,0.85);
    }
    .hero-stat .num {
        font-size: 2rem;
        font-weight: 800;
        color: var(--text-white);
        display: block;
    }
    .hero-stat .label {
        font-size: 0.85rem;
        color: rgba(255,255,255,0.6);
        margin-top: 2px;
    }

    /* ============================================================
       通用板块
       ============================================================ */
    .section {
        padding: 80px 0;
    }
    .section-alt {
        background: var(--bg-card);
    }
    .section-gray {
        background: var(--bg-gray);
    }
    .section-dark {
        background: var(--bg-dark);
        color: var(--text-white);
    }
    .section-header {
        text-align: center;
        max-width: 700px;
        margin: 0 auto 48px;
    }
    .section-header h2 {
        margin-bottom: 12px;
    }
    .section-header p {
        color: var(--text-light);
        font-size: 1.1rem;
    }
    .section-dark .section-header h2 {
        color: var(--text-white);
    }
    .section-dark .section-header p {
        color: rgba(255,255,255,0.65);
    }
    .section-tag {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 4px 14px;
        background: var(--primary-bg);
        color: var(--primary);
        border-radius: 50px;
        font-size: 0.8rem;
        font-weight: 600;
        margin-bottom: 16px;
    }
    .section-dark .section-tag {
        background: rgba(255,255,255,0.1);
        color: var(--primary-light);
    }

    /* ============================================================
       关于 / 核心说明
       ============================================================ */
    .about-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 48px;
        align-items: center;
    }
    .about-image {
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-lg);
        position: relative;
    }
    .about-image img {
        width: 100%;
        height: 400px;
        object-fit: cover;
        transition: var(--transition);
    }
    .about-image:hover img {
        transform: scale(1.03);
    }
    .about-text h2 {
        margin-bottom: 16px;
    }
    .about-text p {
        color: var(--text-light);
        margin-bottom: 20px;
        font-size: 1.05rem;
    }
    .about-features {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
        margin-top: 24px;
    }
    .about-feature {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 12px 16px;
        background: var(--bg);
        border-radius: var(--radius-sm);
        border: 1px solid var(--border);
    }
    .about-feature i {
        width: 36px;
        height: 36px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--primary-bg);
        color: var(--primary);
        border-radius: 8px;
        font-size: 0.95rem;
        flex-shrink: 0;
    }
    .about-feature span {
        font-size: 0.95rem;
        font-weight: 500;
    }

    /* ============================================================
       分类入口 / 频道卡片
       ============================================================ */
    .category-cards {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 24px;
    }
    .category-card {
        position: relative;
        border-radius: var(--radius-lg);
        overflow: hidden;
        background: var(--bg-card);
        border: 1px solid var(--border);
        box-shadow: var(--shadow);
        transition: var(--transition);
        cursor: pointer;
        group: true;
    }
    .category-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
        border-color: var(--primary-light);
    }
    .category-card .card-img {
        height: 200px;
        overflow: hidden;
        position: relative;
    }
    .category-card .card-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: var(--transition);
    }
    .category-card:hover .card-img img {
        transform: scale(1.06);
    }
    .category-card .card-img .overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(to top, rgba(0,0,0,0.5), transparent);
    }
    .category-card .card-body {
        padding: 20px 24px 24px;
    }
    .category-card .card-body h3 {
        font-size: 1.15rem;
        margin-bottom: 6px;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .category-card .card-body h3 i {
        color: var(--primary);
        font-size: 1rem;
    }
    .category-card .card-body p {
        color: var(--text-light);
        font-size: 0.9rem;
        margin-bottom: 0;
    }
    .category-card .card-tag {
        display: inline-block;
        padding: 4px 12px;
        background: var(--primary-bg);
        color: var(--primary);
        border-radius: 50px;
        font-size: 0.75rem;
        font-weight: 600;
        margin-top: 12px;
    }

    /* ============================================================
       最新资讯 / CMS 列表
       ============================================================ */
    .news-list {
        display: grid;
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .news-item {
        display: flex;
        align-items: flex-start;
        gap: 20px;
        padding: 20px 24px;
        background: var(--bg-card);
        border-radius: var(--radius);
        border: 1px solid var(--border);
        box-shadow: var(--shadow);
        transition: var(--transition);
    }
    .news-item:hover {
        border-color: var(--primary-light);
        box-shadow: var(--shadow-md);
        transform: translateX(4px);
    }
    .news-item .thumb {
        width: 120px;
        height: 80px;
        border-radius: var(--radius-sm);
        overflow: hidden;
        flex-shrink: 0;
        background: var(--bg-gray);
    }
    .news-item .thumb img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: var(--transition);
    }
    .news-item:hover .thumb img {
        transform: scale(1.05);
    }
    .news-item .info {
        flex: 1;
        min-width: 0;
    }
    .news-item .info .meta {
        display: flex;
        align-items: center;
        gap: 12px;
        font-size: 0.8rem;
        color: var(--text-lighter);
        margin-bottom: 6px;
    }
    .news-item .info .meta .cat {
        padding: 2px 10px;
        background: var(--primary-bg);
        color: var(--primary);
        border-radius: 50px;
        font-weight: 600;
        font-size: 0.75rem;
    }
    .news-item .info h4 {
        font-size: 1.05rem;
        margin-bottom: 4px;
        font-weight: 600;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-item .info h4 a {
        color: var(--text);
    }
    .news-item .info h4 a:hover {
        color: var(--primary);
    }
    .news-item .info .excerpt {
        font-size: 0.88rem;
        color: var(--text-light);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 0;
    }
    .news-empty {
        text-align: center;
        padding: 40px;
        color: var(--text-light);
        background: var(--bg-card);
        border-radius: var(--radius);
        border: 1px dashed var(--border);
    }
    .news-empty i {
        font-size: 2.5rem;
        color: var(--text-lighter);
        margin-bottom: 16px;
        display: block;
    }

    /* ============================================================
       数据统计
       ============================================================ */
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }
    .stat-card {
        text-align: center;
        padding: 32px 20px;
        background: var(--bg-card);
        border-radius: var(--radius);
        border: 1px solid var(--border);
        box-shadow: var(--shadow);
        transition: var(--transition);
    }
    .stat-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
    }
    .stat-card .icon {
        width: 56px;
        height: 56px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 16px;
        background: var(--primary-bg);
        color: var(--primary);
        border-radius: 14px;
        font-size: 1.4rem;
    }
    .stat-card .num {
        font-size: 2rem;
        font-weight: 800;
        color: var(--text);
        display: block;
    }
    .stat-card .label {
        font-size: 0.9rem;
        color: var(--text-light);
        margin-top: 4px;
    }

    /* ============================================================
       FAQ
       ============================================================ */
    .faq-list {
        max-width: 800px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .faq-item {
        background: var(--bg-card);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        overflow: hidden;
        transition: var(--transition);
    }
    .faq-item:hover {
        border-color: var(--primary-light);
    }
    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 18px 24px;
        font-weight: 600;
        font-size: 1rem;
        cursor: pointer;
        color: var(--text);
        background: none;
        border: none;
        width: 100%;
        text-align: left;
        gap: 16px;
    }
    .faq-question i {
        color: var(--primary);
        font-size: 1.1rem;
        transition: var(--transition);
        flex-shrink: 0;
    }
    .faq-item.open .faq-question i {
        transform: rotate(180deg);
    }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.4s ease;
        padding: 0 24px;
        color: var(--text-light);
        font-size: 0.95rem;
        line-height: 1.8;
    }
    .faq-item.open .faq-answer {
        max-height: 300px;
        padding: 0 24px 20px;
    }

    /* ============================================================
       CTA
       ============================================================ */
    .cta-section {
        background: linear-gradient(135deg, var(--primary-dark), #312E81, var(--primary));
        padding: 80px 0;
        position: relative;
        overflow: hidden;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: radial-gradient(ellipse at 30% 50%, rgba(236,72,153,0.2) 0%, transparent 60%),
                    radial-gradient(ellipse at 70% 50%, rgba(245,158,11,0.15) 0%, transparent 60%);
        pointer-events: none;
    }
    .cta-content {
        position: relative;
        z-index: 2;
        text-align: center;
        max-width: 650px;
        margin: 0 auto;
    }
    .cta-content h2 {
        color: var(--text-white);
        font-size: 2.2rem;
        margin-bottom: 16px;
    }
    .cta-content p {
        color: rgba(255,255,255,0.75);
        font-size: 1.1rem;
        margin-bottom: 32px;
    }
    .cta-content .btn-primary {
        background: var(--text-white);
        color: var(--primary-dark);
        box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    }
    .cta-content .btn-primary:hover {
        background: var(--bg);
        transform: translateY(-3px);
        box-shadow: 0 16px 48px rgba(0,0,0,0.3);
        color: var(--primary-dark);
    }
    .cta-content .btn-primary i {
        color: var(--primary);
    }

    /* ============================================================
       页脚 Footer
       ============================================================ */
    .footer {
        background: var(--bg-dark);
        color: rgba(255,255,255,0.7);
        padding: 60px 0 30px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
        margin-bottom: 40px;
    }
    .footer-brand .logo {
        color: var(--text-white);
        margin-bottom: 16px;
    }
    .footer-brand .logo i {
        background: rgba(255,255,255,0.1);
        color: var(--primary-light);
    }
    .footer-brand .logo span {
        background: linear-gradient(135deg, #A78BFA, #F472B6);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .footer-brand p {
        font-size: 0.9rem;
        color: rgba(255,255,255,0.55);
        max-width: 300px;
        margin-bottom: 20px;
    }
    .footer-social {
        display: flex;
        gap: 12px;
    }
    .footer-social a {
        width: 38px;
        height: 38px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(255,255,255,0.08);
        color: rgba(255,255,255,0.6);
        border-radius: 8px;
        font-size: 1rem;
        transition: var(--transition);
    }
    .footer-social a:hover {
        background: var(--primary);
        color: var(--text-white);
        transform: translateY(-3px);
    }
    .footer h4 {
        color: var(--text-white);
        font-size: 1rem;
        margin-bottom: 16px;
        font-weight: 600;
    }
    .footer-links li {
        margin-bottom: 10px;
    }
    .footer-links a {
        color: rgba(255,255,255,0.55);
        font-size: 0.9rem;
        transition: var(--transition);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .footer-links a:hover {
        color: var(--primary-light);
        padding-left: 4px;
    }
    .footer-links a i {
        font-size: 0.7rem;
    }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.08);
        padding-top: 24px;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        align-items: center;
        gap: 12px;
        font-size: 0.85rem;
        color: rgba(255,255,255,0.4);
    }
    .footer-bottom a {
        color: rgba(255,255,255,0.5);
    }
    .footer-bottom a:hover {
        color: var(--primary-light);
    }

    /* ============================================================
       移动端 / 响应式
       ============================================================ */
    @media (max-width: 1024px) {
        h1 { font-size: 2.4rem; }
        h2 { font-size: 1.8rem; }
        .hero h1 { font-size: 2.8rem; }
        .about-grid { grid-template-columns: 1fr; gap: 32px; }
        .stats-grid { grid-template-columns: repeat(2, 1fr); }
        .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
        .header-inner { padding: 0 16px; }
        .nav {
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(16px);
            flex-direction: column;
            padding: 16px 24px 24px;
            gap: 6px;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow);
            transform: translateY(-120%);
            opacity: 0;
            transition: var(--transition);
            z-index: 999;
        }
        .nav.open {
            transform: translateY(0);
            opacity: 1;
        }
        .nav a {
            width: 100%;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
        }
        .nav a.active::after { display: none; }
        .nav-cta { justify-content: center; }
        .nav-toggle { display: flex; }

        .hero { min-height: 70vh; }
        .hero h1 { font-size: 2.2rem; }
        .hero p { font-size: 1rem; }
        .hero-stats { gap: 24px; }
        .hero-stat .num { font-size: 1.5rem; }

        .section { padding: 48px 0; }
        .section-header { margin-bottom: 32px; }

        .about-features { grid-template-columns: 1fr; }
        .category-cards { grid-template-columns: 1fr; }
        .news-item { flex-direction: column; }
        .news-item .thumb { width: 100%; height: 180px; }

        .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
        .stat-card { padding: 24px 16px; }
        .stat-card .num { font-size: 1.5rem; }

        .footer-grid { grid-template-columns: 1fr; gap: 32px; }
        .footer-bottom { flex-direction: column; text-align: center; }
    }

    @media (max-width: 520px) {
        .container { padding: 0 16px; }
        h1 { font-size: 1.8rem; }
        h2 { font-size: 1.4rem; }
        .hero h1 { font-size: 1.7rem; }
        .hero-actions { flex-direction: column; align-items: center; }
        .btn-primary, .btn-outline-light { width: 100%; justify-content: center; }
        .hero-stats { flex-direction: column; gap: 16px; }
        .stats-grid { grid-template-columns: 1fr 1fr; }
        .category-cards { grid-template-columns: 1fr; }
    }

    /* ============================================================
       工具类
       ============================================================ */
    .text-center { text-align: center; }
    .mt-16 { margin-top: 16px; }
    .mt-24 { margin-top: 24px; }
    .mt-32 { margin-top: 32px; }
    .mt-48 { margin-top: 48px; }
    .gap-16 { gap: 16px; }
    .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6C3BD5;
            --primary-light: #8B5CF6;
            --primary-dark: #4C1D95;
            --primary-bg: rgba(108, 59, 213, 0.08);
            --secondary: #F472B6;
            --secondary-light: #F9A8D4;
            --accent: #10B981;
            --accent-light: #34D399;
            --bg: #F9FAFB;
            --bg-card: #FFFFFF;
            --bg-dark: #1F2937;
            --bg-dark-alt: #111827;
            --text: #1F2937;
            --text-light: #6B7280;
            --text-white: #F9FAFB;
            --border: #E5E7EB;
            --border-light: #F3F4F6;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.1);
            --shadow-hover: 0 8px 32px rgba(108, 59, 213, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --header-h: 72px;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
        }
        h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.2rem);
        }
        h3 {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            color: var(--text-light);
            margin-bottom: 1rem;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        .header-inner {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
        }
        .logo i {
            font-size: 1.5rem;
            color: var(--primary);
            background: var(--primary-bg);
            padding: 8px;
            border-radius: 12px;
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            color: var(--primary);
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 7px;
            white-space: nowrap;
        }
        .nav a i {
            font-size: 0.85rem;
            opacity: 0.7;
        }
        .nav a:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .nav a.active {
            color: var(--primary);
            background: var(--primary-bg);
            font-weight: 600;
        }
        .nav a.active i {
            opacity: 1;
        }
        .nav a.nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            padding: 8px 22px;
            box-shadow: 0 4px 14px rgba(108, 59, 213, 0.3);
        }
        .nav a.nav-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(108, 59, 213, 0.4);
            color: #fff;
        }
        .nav a.nav-cta i {
            opacity: 1;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            cursor: pointer;
            background: var(--bg-card);
            border-radius: 8px;
            border: 1px solid var(--border);
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--text);
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-toggle:hover span {
            background: var(--primary);
        }

        /* ===== Banner ===== */
        .banner {
            padding-top: var(--header-h);
            min-height: 420px;
            display: flex;
            align-items: center;
            position: relative;
            background: linear-gradient(135deg, #1a0a2e 0%, #2d1b4e 40%, #1a1a2e 100%);
            overflow: hidden;
        }
        .banner-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.35;
            mix-blend-mode: overlay;
        }
        .banner .container {
            position: relative;
            z-index: 2;
            padding-top: 48px;
            padding-bottom: 48px;
        }
        .banner-content {
            max-width: 720px;
        }
        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(108, 59, 213, 0.25);
            color: #c4b5fd;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.82rem;
            font-weight: 500;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(108, 59, 213, 0.3);
            margin-bottom: 20px;
        }
        .banner-tag i {
            font-size: 0.75rem;
        }
        .banner h1 {
            color: #fff;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .banner h1 .highlight {
            background: linear-gradient(135deg, var(--secondary), #fbbf24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .banner p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.1rem;
            max-width: 580px;
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .banner-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 16px rgba(108, 59, 213, 0.35);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(108, 59, 213, 0.45);
            color: #fff;
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.3);
        }
        .btn-outline-light:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }

        /* ===== Section ===== */
        .section {
            padding: 80px 0;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-title {
            margin-bottom: 12px;
        }
        .section-sub {
            color: var(--text-light);
            font-size: 1.05rem;
            max-width: 580px;
            margin-bottom: 40px;
        }
        .section-title-center {
            text-align: center;
        }
        .section-sub-center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section-bg {
            background: var(--bg-card);
        }
        .section-bg-alt {
            background: var(--primary-bg);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark .section-title {
            color: #fff;
        }
        .section-dark .section-sub {
            color: rgba(255, 255, 255, 0.7);
        }
        .section-dark .section-label {
            background: rgba(255, 255, 255, 0.1);
            color: var(--secondary-light);
        }

        /* ===== 分类 Tabs ===== */
        .category-tabs {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 36px;
            justify-content: center;
        }
        .category-tabs .tab {
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            background: var(--bg-card);
            border: 1px solid var(--border);
            color: var(--text-light);
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .category-tabs .tab i {
            font-size: 0.8rem;
            opacity: 0.6;
        }
        .category-tabs .tab:hover {
            border-color: var(--primary-light);
            color: var(--primary);
        }
        .category-tabs .tab.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 14px rgba(108, 59, 213, 0.3);
        }
        .category-tabs .tab.active i {
            opacity: 1;
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-bg);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }
        .card-body {
            padding: 20px 22px 24px;
        }
        .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 3px 12px;
            border-radius: 50px;
            font-size: 0.72rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .card-tag i {
            font-size: 0.65rem;
        }
        .card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-body h3 a {
            color: var(--text);
        }
        .card-body h3 a:hover {
            color: var(--primary);
        }
        .card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-light);
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }
        .card-meta i {
            margin-right: 4px;
            opacity: 0.6;
        }
        .card-meta span {
            display: flex;
            align-items: center;
        }

        /* ===== 图文区块 ===== */
        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .feature-block.reverse {
            direction: rtl;
        }
        .feature-block.reverse>* {
            direction: ltr;
        }
        .feature-img {
            border-radius: var(--radius);
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            box-shadow: var(--shadow-lg);
        }
        .feature-content h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
        }
        .feature-content p {
            margin-bottom: 20px;
        }
        .feature-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--text);
        }
        .feature-list li i {
            color: var(--accent);
            margin-top: 3px;
            font-size: 0.9rem;
        }

        /* ===== 数据徽章 ===== */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-card {
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius);
            padding: 32px 16px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }
        .stat-card .num {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .stat-card .num .accent {
            color: var(--secondary);
        }
        .stat-card .label {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            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(--primary-bg);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            background: none;
            width: 100%;
            text-align: left;
        }
        .faq-question i {
            color: var(--primary);
            font-size: 0.9rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--bg-dark));
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.1;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.7);
            max-width: 520px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }
        .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-cta {
            background: #fff;
            color: var(--primary-dark);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
            color: var(--primary);
        }
        .btn-outline-cta {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.3);
        }
        .btn-outline-cta:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark-alt);
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 0;
        }
        .footer .logo {
            color: #fff;
            margin-bottom: 12px;
        }
        .footer .logo i {
            background: rgba(255, 255, 255, 0.1);
            color: var(--secondary-light);
        }
        .footer .logo span {
            background: linear-gradient(135deg, #fff, var(--secondary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
            max-width: 300px;
            margin-top: 8px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.6);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.88rem;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .footer-links a i {
            font-size: 0.6rem;
            opacity: 0.4;
        }
        .footer-links a:hover {
            color: var(--secondary-light);
        }
        .footer-links a:hover i {
            opacity: 1;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a:hover {
            color: var(--secondary-light);
        }

        /* ===== 列表文章 ===== */
        .article-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .article-row {
            display: flex;
            gap: 24px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            padding: 20px;
            border: 1px solid var(--border);
            transition: var(--transition);
            align-items: flex-start;
        }
        .article-row:hover {
            border-color: var(--primary-bg);
            box-shadow: var(--shadow);
            transform: translateX(4px);
        }
        .article-row-img {
            width: 180px;
            min-height: 120px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
        }
        .article-row-body {
            flex: 1;
        }
        .article-row-body h3 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .article-row-body h3 a {
            color: var(--text);
        }
        .article-row-body h3 a:hover {
            color: var(--primary);
        }
        .article-row-body p {
            font-size: 0.88rem;
            color: var(--text-light);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-row-meta {
            display: flex;
            gap: 16px;
            font-size: 0.78rem;
            color: var(--text-light);
        }
        .article-row-meta i {
            margin-right: 4px;
            opacity: 0.6;
        }

        /* ===== 横向滚动组 ===== */
        .scroll-group {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            padding-bottom: 12px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }
        .scroll-group::-webkit-scrollbar {
            height: 6px;
        }
        .scroll-group::-webkit-scrollbar-track {
            background: var(--border-light);
            border-radius: 10px;
        }
        .scroll-group::-webkit-scrollbar-thumb {
            background: var(--primary-light);
            border-radius: 10px;
        }
        .scroll-item {
            min-width: 260px;
            scroll-snap-align: start;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .scroll-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .scroll-item .card-img {
            aspect-ratio: 3/2;
        }
        .scroll-item .card-body {
            padding: 16px 18px 18px;
        }
        .scroll-item .card-body h3 {
            font-size: 0.95rem;
        }
        .scroll-item .card-body p {
            font-size: 0.82rem;
            -webkit-line-clamp: 1;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            .feature-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .feature-block.reverse {
                direction: ltr;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .banner {
                min-height: 360px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }
            .nav {
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                gap: 4px;
            }
            .nav.open {
                display: flex;
            }
            .nav a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-xs);
            }
            .nav a.nav-cta {
                margin-top: 8px;
                text-align: center;
                justify-content: center;
            }
            .nav-toggle {
                display: flex;
            }
            .banner {
                min-height: 320px;
            }
            .banner p {
                font-size: 0.95rem;
            }
            .section {
                padding: 56px 0;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .article-row {
                flex-direction: column;
                padding: 16px;
            }
            .article-row-img {
                width: 100%;
                min-height: 160px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-card {
                padding: 24px 12px;
            }
            .stat-card .num {
                font-size: 1.8rem;
            }
            .category-tabs .tab {
                padding: 8px 16px;
                font-size: 0.82rem;
            }
            .scroll-item {
                min-width: 200px;
            }
            .banner-actions {
                flex-direction: column;
                gap: 10px;
            }
            .banner-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .cta-actions {
                flex-direction: column;
                align-items: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .banner h1 {
                font-size: 1.6rem;
            }
            .section {
                padding: 40px 0;
            }
            .section-sub {
                font-size: 0.92rem;
            }
            .card-body {
                padding: 16px 16px 20px;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-card {
                padding: 18px 10px;
            }
            .stat-card .num {
                font-size: 1.5rem;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 0.85rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
            .header-inner {
                padding: 0 16px;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo i {
                font-size: 1.2rem;
                padding: 6px;
            }
            .category-tabs {
                gap: 6px;
            }
            .category-tabs .tab {
                padding: 6px 12px;
                font-size: 0.78rem;
            }
            .scroll-item {
                min-width: 160px;
            }
            .article-row-img {
                min-height: 120px;
            }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
:root {
  --primary: #4F46E5;
  --primary-light: #818CF8;
  --primary-dark: #3730A3;
  --primary-bg: rgba(79, 70, 229, 0.08);
  --secondary: #EC4899;
  --secondary-light: #F472B6;
  --accent: #F59E0B;
  --accent-light: #FCD34D;
  --bg: #F8FAFC;
  --bg-alt: #F1F5F9;
  --bg-card: #FFFFFF;
  --text: #0F172A;
  --text-light: #64748B;
  --text-muted: #94A3B8;
  --border: #E2E8F0;
  --border-light: #F1F5F9;
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
  --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.05);
  --shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.25);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --container: 1200px;
  --content-width: 780px;
}

/* ===== 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);
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea { font-family: inherit; font-size: 1rem; }
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 24px; }
@media (max-width: 640px) { .container { padding: 0 16px; } }

/* ===== Header / Nav ===== */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(15, 23, 42, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: background var(--transition);
}
.header-inner {
  max-width: var(--container); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; height: 68px;
}
.logo {
  display: flex; align-items: center; gap: 10px; font-size: 1.35rem; font-weight: 800;
  color: #fff; letter-spacing: -0.5px; transition: opacity var(--transition);
}
.logo i { font-size: 1.5rem; color: var(--primary-light); }
.logo span { background: linear-gradient(135deg, #fff 60%, var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.logo:hover { opacity: 0.85; color: #fff; }
.nav { display: flex; align-items: center; gap: 6px; }
.nav a {
  display: flex; align-items: center; gap: 6px; padding: 8px 18px;
  font-size: 0.9rem; font-weight: 500; color: rgba(255,255,255,0.7);
  border-radius: var(--radius-sm); transition: all var(--transition);
  position: relative; white-space: nowrap;
}
.nav a i { font-size: 0.85rem; }
.nav a:hover { color: #fff; background: rgba(255,255,255,0.08); }
.nav a.active { color: #fff; background: rgba(79, 70, 229, 0.3); }
.nav a.active::after { display: none; }
.nav a.nav-cta {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff; font-weight: 600; padding: 8px 20px; border-radius: 20px;
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
}
.nav a.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4); }
.nav-toggle {
  display: none; flex-direction: column; gap: 5px; padding: 8px;
  background: none; border: none; cursor: pointer;
}
.nav-toggle span { display: block; width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: all var(--transition); }
@media (max-width: 768px) {
  .nav { position: fixed; top: 68px; left: 0; right: 0; background: rgba(15, 23, 42, 0.98); backdrop-filter: blur(16px); flex-direction: column; padding: 20px 24px; gap: 8px; transform: translateY(-120%); opacity: 0; transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1); border-bottom: 1px solid rgba(255,255,255,0.06); pointer-events: none; }
  .nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav a { width: 100%; justify-content: center; padding: 12px 18px; font-size: 1rem; }
  .nav-toggle { display: flex; }
  .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .nav-toggle.active span:nth-child(2) { opacity: 0; }
  .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
}

/* ===== Hero / Banner ===== */
.article-hero {
  position: relative; min-height: 420px; display: flex; align-items: flex-end;
  padding: 120px 0 60px; margin-top: 0;
  background: linear-gradient(135deg, #1E1B4B 0%, #312E81 50%, #4F46E5 100%);
  overflow: hidden;
}
.article-hero::before {
  content: ''; position: absolute; inset: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  opacity: 0.2; mix-blend-mode: overlay;
}
.article-hero::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(15,23,42,0.85) 0%, rgba(15,23,42,0.3) 60%, transparent 100%);
}
.article-hero .container { position: relative; z-index: 2; width: 100%; }
.article-hero .breadcrumb {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
  font-size: 0.85rem; color: rgba(255,255,255,0.6); margin-bottom: 20px;
}
.article-hero .breadcrumb a { color: rgba(255,255,255,0.6); transition: color var(--transition); }
.article-hero .breadcrumb a:hover { color: #fff; }
.article-hero .breadcrumb i { font-size: 0.65rem; color: rgba(255,255,255,0.3); }
.article-hero .breadcrumb .current { color: rgba(255,255,255,0.9); }
.article-hero .category-tag {
  display: inline-block; padding: 4px 14px; border-radius: 20px;
  font-size: 0.8rem; font-weight: 600; letter-spacing: 0.3px;
  background: rgba(79, 70, 229, 0.5); color: #fff; margin-bottom: 16px;
  border: 1px solid rgba(255,255,255,0.1);
}
.article-hero h1 {
  font-size: 2.6rem; font-weight: 800; color: #fff; line-height: 1.2;
  max-width: 800px; letter-spacing: -0.5px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.2);
}
.article-hero .meta {
  display: flex; flex-wrap: wrap; align-items: center; gap: 20px;
  margin-top: 20px; color: rgba(255,255,255,0.7); font-size: 0.9rem;
}
.article-hero .meta i { margin-right: 6px; color: rgba(255,255,255,0.4); }
@media (max-width: 768px) {
  .article-hero { min-height: 320px; padding: 100px 0 40px; }
  .article-hero h1 { font-size: 1.8rem; }
  .article-hero .meta { gap: 12px; font-size: 0.8rem; }
}
@media (max-width: 520px) {
  .article-hero { min-height: 260px; padding: 80px 0 30px; }
  .article-hero h1 { font-size: 1.4rem; }
}

/* ===== Article Content ===== */
.article-main { padding: 60px 0 40px; }
.article-body {
  max-width: var(--content-width); margin: 0 auto;
  background: var(--bg-card); border-radius: var(--radius-lg);
  padding: 48px; box-shadow: var(--shadow);
}
.article-body .meta-bar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 16px 24px;
  padding-bottom: 24px; margin-bottom: 32px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem; color: var(--text-light);
}
.article-body .meta-bar i { margin-right: 6px; color: var(--primary); width: 16px; text-align: center; }
.article-body .meta-bar .author { font-weight: 600; color: var(--text); }
.article-body .meta-bar .reading-time { color: var(--text-muted); }
.article-body .content {
  font-size: 1.05rem; line-height: 1.85; color: var(--text);
}
.article-body .content p { margin-bottom: 1.6em; }
.article-body .content h2 { font-size: 1.6rem; margin-top: 2em; margin-bottom: 0.8em; color: var(--text); }
.article-body .content h3 { font-size: 1.25rem; margin-top: 1.6em; margin-bottom: 0.6em; color: var(--text); }
.article-body .content img { border-radius: var(--radius); margin: 1.8em 0; box-shadow: var(--shadow); }
.article-body .content blockquote {
  border-left: 4px solid var(--primary); padding: 16px 24px; margin: 1.8em 0;
  background: var(--primary-bg); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic; color: var(--text-light);
}
.article-body .content ul, .article-body .content ol { margin: 1.2em 0; padding-left: 1.6em; }
.article-body .content ul li { list-style: disc; margin-bottom: 0.4em; }
.article-body .content ol li { list-style: decimal; margin-bottom: 0.4em; }
.article-body .content a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.article-body .content a:hover { color: var(--primary-dark); }
.article-body .content code {
  background: var(--bg-alt); padding: 2px 8px; border-radius: 4px;
  font-size: 0.9em; font-family: 'SF Mono', 'Fira Code', monospace;
}
.article-body .content pre { background: #1E293B; color: #E2E8F0; padding: 20px 24px; border-radius: var(--radius); overflow-x: auto; margin: 1.8em 0; font-size: 0.9rem; line-height: 1.6; }
.article-body .content pre code { background: none; padding: 0; color: inherit; font-size: inherit; }
.article-body .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); }
.article-body .tags .tag { padding: 4px 14px; border-radius: 20px; font-size: 0.8rem; font-weight: 500; background: var(--bg-alt); color: var(--text-light); transition: all var(--transition); }
.article-body .tags .tag:hover { background: var(--primary-bg); color: var(--primary); }
.article-body .share-bar { display: flex; align-items: center; gap: 12px; margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border); }
.article-body .share-bar span { font-size: 0.9rem; color: var(--text-light); font-weight: 500; }
.article-body .share-bar a { display: flex; align-items: center; justify-content: center; width: 38px; height: 38px; border-radius: 50%; background: var(--bg-alt); color: var(--text-light); transition: all var(--transition); font-size: 1rem; }
.article-body .share-bar a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow); }
@media (max-width: 820px) {
  .article-body { padding: 32px 24px; }
  .article-body .content { font-size: 1rem; }
}
@media (max-width: 520px) {
  .article-body { padding: 24px 16px; border-radius: var(--radius); }
  .article-body .content { font-size: 0.95rem; }
  .article-body .meta-bar { flex-direction: column; gap: 8px; align-items: flex-start; }
}

/* ===== Article Not Found ===== */
.not-found-wrap { text-align: center; padding: 80px 24px; }
.not-found-wrap .icon { font-size: 4rem; color: var(--text-muted); margin-bottom: 20px; }
.not-found-wrap h2 { font-size: 1.8rem; margin-bottom: 12px; }
.not-found-wrap p { color: var(--text-light); margin-bottom: 24px; font-size: 1.05rem; }
.not-found-wrap .btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: var(--radius); font-weight: 600; font-size: 1rem; background: var(--primary); color: #fff; transition: all var(--transition); }
.not-found-wrap .btn:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-lg); }

/* ===== Related Articles ===== */
.related-section { padding: 60px 0; background: var(--bg-alt); }
.related-section .section-title { text-align: center; margin-bottom: 40px; }
.related-section .section-title h2 { font-size: 1.8rem; font-weight: 700; }
.related-section .section-title p { color: var(--text-light); margin-top: 8px; font-size: 1rem; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card {
  background: var(--bg-card); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow-sm); transition: all var(--transition);
  border: 1px solid var(--border-light);
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.related-card .card-img { aspect-ratio: 16/10; overflow: hidden; }
.related-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.related-card:hover .card-img img { transform: scale(1.05); }
.related-card .card-body { padding: 20px; }
.related-card .card-body .cat { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; color: var(--primary); margin-bottom: 6px; }
.related-card .card-body h3 { font-size: 1.05rem; font-weight: 600; line-height: 1.4; margin-bottom: 8px; }
.related-card .card-body h3 a { color: var(--text); transition: color var(--transition); }
.related-card .card-body h3 a:hover { color: var(--primary); }
.related-card .card-body p { font-size: 0.85rem; color: var(--text-light); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-card .card-body .date { font-size: 0.8rem; color: var(--text-muted); margin-top: 12px; display: flex; align-items: center; gap: 6px; }
@media (max-width: 992px) { .related-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .related-grid { grid-template-columns: 1fr; } }

/* ===== CTA Section ===== */
.cta-section {
  padding: 80px 0; text-align: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--secondary) 100%);
  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: 0.08; mix-blend-mode: overlay; }
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 { font-size: 2.2rem; font-weight: 800; color: #fff; margin-bottom: 16px; }
.cta-section p { font-size: 1.1rem; color: rgba(255,255,255,0.85); max-width: 600px; margin: 0 auto 32px; line-height: 1.6; }
.cta-section .btn-group { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
.cta-section .btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px; border-radius: var(--radius); font-weight: 600; font-size: 1rem; transition: all var(--transition); }
.cta-section .btn-primary { background: #fff; color: var(--primary); box-shadow: 0 4px 14px rgba(0,0,0,0.15); }
.cta-section .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); color: var(--primary-dark); }
.cta-section .btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.4); }
.cta-section .btn-outline:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.7); transform: translateY(-2px); }
@media (max-width: 640px) {
  .cta-section { padding: 60px 0; }
  .cta-section h2 { font-size: 1.6rem; }
  .cta-section p { font-size: 0.95rem; }
}

/* ===== Footer ===== */
.footer {
  background: #0F172A; color: rgba(255,255,255,0.7); padding: 60px 0 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer .container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.06); }
.footer-brand .logo { color: #fff; font-size: 1.3rem; margin-bottom: 16px; display: inline-flex; }
.footer-brand .logo i { color: var(--primary-light); }
.footer-brand .logo span { -webkit-text-fill-color: #fff; background: none; }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 340px; margin-bottom: 20px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 50%; background: rgba(255,255,255,0.06); color: rgba(255,255,255,0.6); font-size: 1.1rem; transition: all var(--transition); }
.footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.footer h4 { font-size: 0.95rem; font-weight: 600; color: #fff; margin-bottom: 20px; letter-spacing: 0.3px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { display: flex; align-items: center; gap: 8px; font-size: 0.9rem; color: rgba(255,255,255,0.6); transition: all var(--transition); }
.footer-links a i { font-size: 0.6rem; color: rgba(255,255,255,0.3); transition: color var(--transition); }
.footer-links a:hover { color: #fff; transform: translateX(4px); }
.footer-links a:hover i { color: var(--primary-light); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; padding: 24px 0; gap: 12px; font-size: 0.85rem; color: rgba(255,255,255,0.4); }
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: #fff; }
@media (max-width: 992px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
@media (max-width: 640px) { .footer-grid { grid-template-columns: 1fr; gap: 28px; } .footer-bottom { flex-direction: column; text-align: center; } }

/* ===== Utility ===== */
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-32 { margin-top: 32px; }
.mb-16 { margin-bottom: 16px; }
.mb-32 { margin-bottom: 32px; }