/* roulang page: index */
/* ===== 设计变量 ===== */
    :root {
        --primary: #6C5CE7;
        --primary-dark: #5A4BD1;
        --primary-light: #A29BFE;
        --secondary: #FDCB6E;
        --secondary-dark: #F0B429;
        --accent: #FF6B6B;
        --dark: #1E1E2F;
        --dark-light: #2D2D44;
        --bg: #F5F3FF;
        --bg-white: #FFFFFF;
        --bg-card: #FFFFFF;
        --text: #2D2D44;
        --text-light: #6B7280;
        --text-white: #FFFFFF;
        --border: #E5E7EB;
        --border-light: #F3F4F6;
        --radius: 16px;
        --radius-sm: 8px;
        --radius-lg: 24px;
        --shadow: 0 4px 20px rgba(108, 92, 231, 0.10);
        --shadow-lg: 0 12px 40px rgba(108, 92, 231, 0.15);
        --shadow-hover: 0 20px 50px rgba(108, 92, 231, 0.20);
        --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        --max-width: 1200px;
        --header-height: 76px;
    }

    /* ===== 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-base);
        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-dark); }
    img { max-width: 100%; height: auto; display: block; }
    button, input, select, textarea {
        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(--dark); }
    h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
    h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); }
    h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }
    p { margin-bottom: 0.8rem; color: var(--text-light); }
    .container {
        width: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }
    .section { padding: 80px 0; }
    .section-title {
        text-align: center;
        margin-bottom: 16px;
        position: relative;
    }
    .section-subtitle {
        text-align: center;
        color: var(--text-light);
        max-width: 640px;
        margin: 0 auto 48px;
        font-size: 1.05rem;
    }

    /* ===== Buttons ===== */
    .btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 28px;
        border-radius: var(--radius-sm);
        font-weight: 600;
        font-size: 0.95rem;
        transition: var(--transition);
        border: 2px solid transparent;
        justify-content: center;
    }
    .btn-primary {
        background: var(--primary);
        color: var(--text-white);
        border-color: var(--primary);
    }
    .btn-primary:hover {
        background: var(--primary-dark);
        border-color: var(--primary-dark);
        color: var(--text-white);
        transform: translateY(-2px);
        box-shadow: 0 8px 25px rgba(108, 92, 231, 0.30);
    }
    .btn-primary:active { transform: translateY(0); }
    .btn-primary:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; }
    .btn-secondary {
        background: transparent;
        color: var(--primary);
        border-color: var(--primary);
    }
    .btn-secondary:hover {
        background: var(--primary);
        color: var(--text-white);
        transform: translateY(-2px);
    }
    .btn-accent {
        background: var(--secondary);
        color: var(--dark);
        border-color: var(--secondary);
    }
    .btn-accent:hover {
        background: var(--secondary-dark);
        border-color: var(--secondary-dark);
        transform: translateY(-2px);
        box-shadow: 0 8px 25px rgba(253, 203, 110, 0.35);
    }
    .btn-lg { padding: 16px 36px; font-size: 1.05rem; border-radius: var(--radius); }
    .btn-sm { padding: 8px 18px; font-size: 0.85rem; }
    .btn-block { width: 100%; }

    /* ===== Badge / Tag ===== */
    .badge {
        display: inline-block;
        padding: 4px 14px;
        border-radius: 50px;
        font-size: 0.75rem;
        font-weight: 600;
        letter-spacing: 0.3px;
        text-transform: uppercase;
    }
    .badge-primary { background: rgba(108, 92, 231, 0.12); color: var(--primary); }
    .badge-secondary { background: rgba(253, 203, 110, 0.20); color: #B8860B; }
    .badge-accent { background: rgba(255, 107, 107, 0.12); color: var(--accent); }
    .badge-hot { background: linear-gradient(135deg, #FF6B6B, #EE5A24); color: #fff; }
    .badge-new { background: linear-gradient(135deg, #6C5CE7, #A29BFE); color: #fff; }

    /* ===== Header / Navigation ===== */
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border-light);
        height: var(--header-height);
        transition: var(--transition);
    }
    .header.scrolled { box-shadow: var(--shadow); }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: var(--header-height);
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
    }
    .logo {
        font-size: 1.4rem;
        font-weight: 800;
        color: var(--dark);
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .logo i { color: var(--primary); font-size: 1.6rem; }
    .logo span { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
    .logo:hover { color: var(--dark); }
    .nav-menu { display: flex; align-items: center; gap: 4px; }
    .nav-item {
        padding: 8px 20px;
        border-radius: 50px;
        font-weight: 500;
        font-size: 0.9rem;
        color: var(--text);
        transition: var(--transition);
        position: relative;
    }
    .nav-item:hover { color: var(--primary); background: rgba(108, 92, 231, 0.06); }
    .nav-item.active {
        color: var(--text-white);
        background: var(--primary);
        box-shadow: 0 4px 15px rgba(108, 92, 231, 0.25);
    }
    .nav-item.active:hover { color: var(--text-white); background: var(--primary-dark); }
    .nav-actions { display: flex; align-items: center; gap: 12px; }
    .nav-search {
        display: flex;
        align-items: center;
        background: var(--bg);
        border-radius: 50px;
        padding: 0 16px;
        border: 1px solid var(--border);
        transition: var(--transition);
    }
    .nav-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.10); }
    .nav-search input {
        border: none;
        background: transparent;
        padding: 8px 8px 8px 4px;
        font-size: 0.85rem;
        width: 140px;
        color: var(--text);
    }
    .nav-search input::placeholder { color: var(--text-light); }
    .nav-search i { color: var(--text-light); font-size: 0.85rem; }
    .nav-toggle { display: none; font-size: 1.5rem; color: var(--dark); padding: 4px; }
    .nav-toggle:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; }

    @media (max-width: 820px) {
        .nav-menu {
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(20px);
            flex-direction: column;
            padding: 16px 24px;
            gap: 8px;
            border-bottom: 1px solid var(--border-light);
            transform: translateY(-110%);
            opacity: 0;
            transition: var(--transition);
            pointer-events: none;
            box-shadow: var(--shadow);
        }
        .nav-menu.open { transform: translateY(0); opacity: 1; pointer-events: all; }
        .nav-item { width: 100%; text-align: center; padding: 12px; }
        .nav-toggle { display: block; }
        .nav-search input { width: 100px; }
    }
    @media (max-width: 520px) {
        .header-inner { padding: 0 16px; }
        .logo { font-size: 1.1rem; }
        .logo i { font-size: 1.2rem; }
        .nav-search { display: none; }
        .nav-actions .btn-sm { display: none; }
    }

    /* ===== Hero ===== */
    .hero {
        min-height: 100vh;
        display: flex;
        align-items: center;
        position: relative;
        background: linear-gradient(135deg, #1E1E2F 0%, #2D2D44 50%, #1E1E2F 100%);
        overflow: hidden;
        padding-top: var(--header-height);
    }
    .hero-bg {
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        opacity: 0.35;
        z-index: 0;
    }
    .hero-overlay {
        position: absolute;
        inset: 0;
        background: radial-gradient(ellipse at 30% 50%, rgba(108, 92, 231, 0.25) 0%, transparent 60%),
                    radial-gradient(ellipse at 70% 50%, rgba(253, 203, 110, 0.10) 0%, transparent 50%);
        z-index: 1;
    }
    .hero-content {
        position: relative;
        z-index: 2;
        max-width: 780px;
        margin: 0 auto;
        text-align: center;
        padding: 60px 24px;
    }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: rgba(108, 92, 231, 0.20);
        border: 1px solid rgba(108, 92, 231, 0.30);
        color: var(--primary-light);
        padding: 6px 20px;
        border-radius: 50px;
        font-size: 0.85rem;
        font-weight: 500;
        margin-bottom: 24px;
        backdrop-filter: blur(4px);
    }
    .hero-title {
        color: var(--text-white);
        font-size: clamp(2.2rem, 6vw, 3.8rem);
        font-weight: 800;
        margin-bottom: 20px;
        letter-spacing: -0.5px;
    }
    .hero-title span {
        background: linear-gradient(135deg, var(--primary-light), var(--secondary));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .hero-text {
        color: rgba(255, 255, 255, 0.75);
        font-size: 1.15rem;
        max-width: 600px;
        margin: 0 auto 32px;
        line-height: 1.8;
    }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; margin-bottom: 40px; }
    .hero-search {
        display: flex;
        max-width: 480px;
        margin: 0 auto;
        background: rgba(255, 255, 255, 0.10);
        border: 1px solid rgba(255, 255, 255, 0.15);
        border-radius: 50px;
        padding: 4px;
        backdrop-filter: blur(8px);
    }
    .hero-search input {
        flex: 1;
        border: none;
        background: transparent;
        padding: 14px 20px;
        font-size: 1rem;
        color: var(--text-white);
    }
    .hero-search input::placeholder { color: rgba(255, 255, 255, 0.50); }
    .hero-search button {
        background: var(--primary);
        color: var(--text-white);
        border: none;
        border-radius: 50px;
        padding: 14px 28px;
        font-weight: 600;
        transition: var(--transition);
    }
    .hero-search button:hover { background: var(--primary-dark); }
    .hero-stats {
        display: flex;
        justify-content: center;
        gap: 40px;
        margin-top: 40px;
        flex-wrap: wrap;
    }
    .hero-stat { text-align: center; }
    .hero-stat-number {
        font-size: 2rem;
        font-weight: 800;
        color: var(--text-white);
        line-height: 1.2;
    }
    .hero-stat-number i { color: var(--secondary); font-size: 1.4rem; margin-right: 4px; }
    .hero-stat-label { color: rgba(255, 255, 255, 0.55); font-size: 0.85rem; }

    @media (max-width: 768px) {
        .hero { min-height: 80vh; }
        .hero-content { padding: 40px 16px; }
        .hero-stats { gap: 24px; }
        .hero-stat-number { font-size: 1.5rem; }
    }
    @media (max-width: 520px) {
        .hero-search { flex-direction: column; border-radius: var(--radius); gap: 8px; padding: 8px; }
        .hero-search input { text-align: center; }
        .hero-search button { width: 100%; }
        .hero-actions .btn { width: 100%; }
    }

    /* ===== Features / 核心说明 ===== */
    .features-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .feature-card {
        background: var(--bg-card);
        border-radius: var(--radius);
        padding: 36px 28px;
        text-align: center;
        box-shadow: var(--shadow);
        border: 1px solid var(--border-light);
        transition: var(--transition);
    }
    .feature-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-hover);
        border-color: rgba(108, 92, 231, 0.15);
    }
    .feature-icon {
        width: 64px;
        height: 64px;
        border-radius: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 20px;
        font-size: 1.6rem;
        color: var(--text-white);
    }
    .feature-icon.purple { background: linear-gradient(135deg, #6C5CE7, #A29BFE); }
    .feature-icon.gold { background: linear-gradient(135deg, #FDCB6E, #F39C12); }
    .feature-icon.coral { background: linear-gradient(135deg, #FF6B6B, #EE5A24); }
    .feature-card h3 { margin-bottom: 12px; }
    .feature-card p { font-size: 0.92rem; margin-bottom: 0; }

    @media (max-width: 900px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
    @media (max-width: 560px) { .features-grid { grid-template-columns: 1fr; } }

    /* ===== Category Tabs ===== */
    .category-tabs {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
        margin-bottom: 40px;
    }
    .category-tab {
        padding: 10px 24px;
        border-radius: 50px;
        font-weight: 500;
        font-size: 0.9rem;
        background: var(--bg-card);
        border: 1px solid var(--border);
        color: var(--text);
        transition: var(--transition);
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .category-tab:hover { border-color: var(--primary); color: var(--primary); background: rgba(108, 92, 231, 0.04); }
    .category-tab.active {
        background: var(--primary);
        border-color: var(--primary);
        color: var(--text-white);
        box-shadow: 0 4px 15px rgba(108, 92, 231, 0.25);
    }
    .category-tab i { font-size: 0.85rem; }

    /* ===== Game Cards Grid ===== */
    .game-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .game-card {
        background: var(--bg-card);
        border-radius: var(--radius);
        overflow: hidden;
        box-shadow: var(--shadow);
        border: 1px solid var(--border-light);
        transition: var(--transition);
    }
    .game-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-hover);
    }
    .game-card-img {
        width: 100%;
        height: 200px;
        object-fit: cover;
        background: var(--dark-light);
    }
    .game-card-body { padding: 20px; }
    .game-card-tags { display: flex; gap: 6px; margin-bottom: 10px; flex-wrap: wrap; }
    .game-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
    .game-card h3 a { color: var(--dark); }
    .game-card h3 a:hover { color: var(--primary); }
    .game-card p { font-size: 0.88rem; margin-bottom: 12px; }
    .game-card-meta { display: flex; justify-content: space-between; align-items: center; font-size: 0.82rem; color: var(--text-light); }
    .game-card-meta i { margin-right: 4px; }

    @media (max-width: 960px) { .game-grid { grid-template-columns: repeat(2, 1fr); } }
    @media (max-width: 560px) { .game-grid { grid-template-columns: 1fr; } }

    /* ===== Latest News / CMS List ===== */
    .news-list { display: flex; flex-direction: column; gap: 16px; }
    .news-item {
        background: var(--bg-card);
        border-radius: var(--radius-sm);
        padding: 20px 24px;
        display: flex;
        align-items: center;
        gap: 20px;
        border: 1px solid var(--border-light);
        transition: var(--transition);
    }
    .news-item:hover { box-shadow: var(--shadow); border-color: rgba(108, 92, 231, 0.12); }
    .news-item-category {
        flex-shrink: 0;
        background: rgba(108, 92, 231, 0.08);
        color: var(--primary);
        padding: 4px 14px;
        border-radius: 50px;
        font-size: 0.75rem;
        font-weight: 600;
    }
    .news-item-content { flex: 1; min-width: 0; }
    .news-item-content h4 { font-size: 1rem; margin-bottom: 4px; }
    .news-item-content h4 a { color: var(--dark); }
    .news-item-content h4 a:hover { color: var(--primary); }
    .news-item-content p { font-size: 0.88rem; margin-bottom: 0; }
    .news-item-time {
        flex-shrink: 0;
        font-size: 0.82rem;
        color: var(--text-light);
        display: flex;
        align-items: center;
        gap: 4px;
    }
    @media (max-width: 640px) {
        .news-item { flex-direction: column; align-items: flex-start; gap: 10px; }
        .news-item-time { align-self: flex-end; }
    }

    /* ===== Stats / 数据 ===== */
    .stats-section {
        background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
        position: relative;
        overflow: hidden;
    }
    .stats-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
        opacity: 0.10;
        z-index: 0;
    }
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 28px;
        position: relative;
        z-index: 1;
    }
    .stat-card {
        text-align: center;
        padding: 32px 16px;
        background: rgba(255, 255, 255, 0.06);
        border-radius: var(--radius);
        border: 1px solid rgba(255, 255, 255, 0.08);
        backdrop-filter: blur(4px);
    }
    .stat-card-icon { font-size: 2rem; color: var(--secondary); margin-bottom: 12px; }
    .stat-card-number { font-size: 2.4rem; font-weight: 800; color: var(--text-white); margin-bottom: 4px; }
    .stat-card-label { font-size: 0.9rem; color: rgba(255, 255, 255, 0.60); }

    @media (max-width: 860px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
    @media (max-width: 480px) { .stats-grid { grid-template-columns: 1fr; } }

    /* ===== Process / 流程 ===== */
    .process-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
        position: relative;
    }
    .process-grid::before {
        content: '';
        position: absolute;
        top: 48px;
        left: 15%;
        right: 15%;
        height: 2px;
        background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
        opacity: 0.3;
        z-index: 0;
    }
    .process-step {
        text-align: center;
        position: relative;
        z-index: 1;
        background: var(--bg-card);
        border-radius: var(--radius);
        padding: 36px 24px;
        box-shadow: var(--shadow);
        border: 1px solid var(--border-light);
    }
    .process-step-number {
        width: 56px;
        height: 56px;
        border-radius: 50%;
        background: linear-gradient(135deg, var(--primary), var(--primary-light));
        color: var(--text-white);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.4rem;
        font-weight: 700;
        margin: 0 auto 16px;
    }
    .process-step h3 { margin-bottom: 8px; }
    .process-step p { font-size: 0.9rem; margin-bottom: 0; }

    @media (max-width: 860px) {
        .process-grid { grid-template-columns: 1fr; gap: 20px; }
        .process-grid::before { display: none; }
        .process-step { display: flex; align-items: center; gap: 20px; text-align: left; padding: 20px; }
        .process-step-number { margin: 0; flex-shrink: 0; }
    }

    /* ===== FAQ ===== */
    .faq-list { max-width: 720px; 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-light);
        overflow: hidden;
        transition: var(--transition);
    }
    .faq-item:hover { border-color: rgba(108, 92, 231, 0.15); }
    .faq-question {
        padding: 18px 24px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-weight: 600;
        font-size: 0.98rem;
        color: var(--dark);
        cursor: pointer;
        transition: var(--transition);
        gap: 12px;
        width: 100%;
        text-align: left;
        background: none;
        border: none;
    }
    .faq-question:hover { color: var(--primary); }
    .faq-question i { color: var(--primary); transition: var(--transition); font-size: 0.85rem; }
    .faq-question.active i { transform: rotate(180deg); }
    .faq-answer {
        padding: 0 24px 18px;
        font-size: 0.92rem;
        color: var(--text-light);
        display: none;
        line-height: 1.7;
    }
    .faq-answer.open { display: block; }

    /* ===== CTA ===== */
    .cta-section {
        background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
        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: 0.10;
        z-index: 0;
    }
    .cta-content {
        position: relative;
        z-index: 1;
        text-align: center;
        max-width: 600px;
        margin: 0 auto;
    }
    .cta-content h2 { color: var(--text-white); margin-bottom: 16px; }
    .cta-content p { color: rgba(255, 255, 255, 0.80); font-size: 1.05rem; margin-bottom: 32px; }
    .cta-content .btn { background: var(--text-white); color: var(--primary); border-color: var(--text-white); }
    .cta-content .btn:hover { background: transparent; color: var(--text-white); transform: translateY(-2px); }

    /* ===== Footer ===== */
    .footer {
        background: var(--dark);
        color: rgba(255, 255, 255, 0.70);
        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 p { font-size: 0.9rem; color: rgba(255, 255, 255, 0.55); max-width: 320px; }
    .footer-social { display: flex; gap: 10px; margin-top: 16px; }
    .footer-social a {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.08);
        display: flex;
        align-items: center;
        justify-content: center;
        color: rgba(255, 255, 255, 0.60);
        transition: var(--transition);
    }
    .footer-social a:hover { background: var(--primary); color: var(--text-white); }
    .footer h4 { color: var(--text-white); font-size: 1rem; margin-bottom: 16px; }
    .footer-links li { margin-bottom: 10px; }
    .footer-links a { color: rgba(255, 255, 255, 0.55); font-size: 0.9rem; }
    .footer-links a:hover { color: var(--primary-light); }
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding-top: 24px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 0.85rem;
        color: rgba(255, 255, 255, 0.40);
    }

    @media (max-width: 860px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
    @media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } .footer-bottom { flex-direction: column; text-align: center; } }

    /* ===== Utility ===== */
    .text-center { text-align: center; }
    .mt-16 { margin-top: 16px; }
    .mt-24 { margin-top: 24px; }
    .mt-32 { margin-top: 32px; }
    .mb-16 { margin-bottom: 16px; }
    .mb-24 { margin-bottom: 24px; }
    .gap-8 { gap: 8px; }
    .gap-12 { gap: 12px; }
    .flex-center { display: flex; align-items: center; justify-content: center; }
    .flex-wrap { flex-wrap: wrap; }

    @media (max-width: 520px) {
        .section { padding: 48px 0; }
        .container { padding: 0 16px; }
    }

    /* ===== Focus visible ===== */
    :focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6C5CE7;
            --primary-dark: #5A4BD1;
            --primary-light: #A29BFE;
            --primary-bg: rgba(108, 92, 231, 0.08);
            --secondary: #FD79A8;
            --secondary-light: #FDCB6E;
            --accent: #00CEC9;
            --bg: #F8F9FE;
            --bg-alt: #FFFFFF;
            --bg-card: #FFFFFF;
            --text: #2D3436;
            --text-light: #636E72;
            --text-muted: #B2BEC3;
            --border: #E8E8F0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 8px 32px rgba(108, 92, 231, 0.10);
            --shadow-hover: 0 16px 48px rgba(108, 92, 231, 0.18);
            --shadow-sm: 0 2px 12px rgba(0,0,0,0.06);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
            --spacing: 64px;
            --spacing-sm: 32px;
        }

        /* ===== 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);
            padding-top: var(--header-h);
        }
        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); }
        button, input, textarea { font-family: inherit; font-size: 1rem; outline: none; }
        ul { list-style: none; }
        .container {
            width: 100%;
            max-width: var(--max-width);
            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(255,255,255,0.92);
            backdrop-filter: blur(20px) saturate(1.4);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        .header.scrolled { box-shadow: 0 4px 20px rgba(0,0,0,0.06); }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text);
            flex-shrink: 0;
        }
        .logo i { color: var(--primary); font-size: 1.6rem; }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-menu { display: flex; align-items: center; gap: 4px; }
        .nav-item {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .nav-item i { font-size: 0.85rem; }
        .nav-item:hover { color: var(--primary); background: var(--primary-bg); }
        .nav-item.active { color: #fff; background: var(--primary); box-shadow: 0 4px 12px rgba(108,92,231,0.3); }
        .nav-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
        .nav-search {
            display: flex; align-items: center; gap: 8px;
            background: var(--bg); border-radius: 50px; padding: 6px 16px;
            border: 1px solid var(--border); transition: var(--transition);
        }
        .nav-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-bg); }
        .nav-search i { color: var(--text-muted); font-size: 0.9rem; }
        .nav-search input { border: none; background: transparent; padding: 4px 0; min-width: 120px; color: var(--text); }
        .nav-search input::placeholder { color: var(--text-muted); }
        .nav-toggle { display: none; background: none; border: none; font-size: 1.4rem; color: var(--text); cursor: pointer; padding: 4px; }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 12px 28px; border-radius: 50px; font-weight: 700; font-size: 0.95rem;
            border: none; cursor: pointer; transition: var(--transition);
            text-decoration: none; white-space: nowrap;
        }
        .btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 16px rgba(108,92,231,0.3); }
        .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(108,92,231,0.4); color: #fff; }
        .btn-secondary { background: var(--bg); color: var(--text); border: 1px solid var(--border); }
        .btn-secondary:hover { background: var(--border); transform: translateY(-2px); }
        .btn-sm { padding: 8px 18px; font-size: 0.85rem; }
        .btn-lg { padding: 16px 36px; font-size: 1.05rem; }

        /* ===== 文章详情页 ===== */
        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--primary), #4A3CB5);
            margin-top: calc(var(--header-h) * -1);
            padding-top: calc(var(--header-h) + 60px);
        }
        .article-banner::before {
            content: '';
            position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .article-banner .container { position: relative; z-index: 1; }
        .article-breadcrumb {
            display: flex; align-items: center; gap: 10px;
            font-size: 0.9rem; color: rgba(255,255,255,0.7); margin-bottom: 20px;
        }
        .article-breadcrumb a { color: rgba(255,255,255,0.8); }
        .article-breadcrumb a:hover { color: #fff; }
        .article-breadcrumb span { color: rgba(255,255,255,0.5); }
        .article-category-badge {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 50px;
            background: rgba(255,255,255,0.2);
            color: #fff;
            font-size: 0.8rem;
            font-weight: 600;
            backdrop-filter: blur(4px);
            margin-bottom: 16px;
        }
        .article-title {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            max-width: 900px;
            margin-bottom: 20px;
        }
        .article-meta {
            display: flex; flex-wrap: wrap; gap: 20px;
            color: rgba(255,255,255,0.75);
            font-size: 0.9rem;
        }
        .article-meta i { margin-right: 6px; }
        .article-meta span { display: flex; align-items: center; }

        /* ===== 正文区 ===== */
        .article-section { padding: 60px 0 80px; }
        .article-layout {
            display: grid; grid-template-columns: 1fr 300px; gap: 48px;
            align-items: start;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 48px;
            box-shadow: var(--shadow-sm);
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body .content h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin: 36px 0 16px;
            color: var(--text);
            padding-left: 16px;
            border-left: 4px solid var(--primary);
        }
        .article-body .content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 28px 0 12px;
            color: var(--text);
        }
        .article-body .content p { margin-bottom: 18px; }
        .article-body .content ul, .article-body .content ol { margin: 16px 0; padding-left: 24px; }
        .article-body .content li { margin-bottom: 8px; }
        .article-body .content a { color: var(--primary); text-decoration: underline; }
        .article-body .content img { border-radius: var(--radius-sm); margin: 24px 0; box-shadow: var(--shadow-sm); }
        .article-body .content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-bg);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body .content pre {
            background: #1e1e2e;
            color: #cdd6f4;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            margin: 24px 0;
            font-size: 0.9rem;
        }
        .article-body .content code { font-family: 'Cascadia Code', 'Fira Code', monospace; }
        .article-body .content table { width: 100%; border-collapse: collapse; margin: 24px 0; }
        .article-body .content th, .article-body .content td { padding: 12px 16px; border: 1px solid var(--border); text-align: left; }
        .article-body .content th { background: var(--primary-bg); font-weight: 600; }

        .article-not-found {
            text-align: center;
            padding: 80px 40px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
        }
        .article-not-found i { font-size: 4rem; color: var(--text-muted); margin-bottom: 24px; }
        .article-not-found h2 { font-size: 1.8rem; color: var(--text); margin-bottom: 12px; }
        .article-not-found p { color: var(--text-light); margin-bottom: 24px; }

        /* ===== 侧边栏 ===== */
        .article-sidebar { display: flex; flex-direction: column; gap: 32px; }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px;
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex; align-items: center; gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-list { display: flex; flex-direction: column; gap: 12px; }
        .sidebar-list a {
            display: flex; align-items: center; gap: 12px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            background: var(--bg);
            color: var(--text);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .sidebar-list a:hover { background: var(--primary-bg); color: var(--primary); transform: translateX(4px); }
        .sidebar-list a img { width: 48px; height: 48px; border-radius: 8px; object-fit: cover; flex-shrink: 0; }
        .sidebar-list a .info { flex: 1; min-width: 0; }
        .sidebar-list a .info .title { font-weight: 600; display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
        .sidebar-list a .info .date { font-size: 0.78rem; color: var(--text-muted); }

        .sidebar-tags { display: flex; flex-wrap: wrap; gap: 8px; }
        .sidebar-tags a {
            padding: 6px 14px;
            border-radius: 50px;
            background: var(--bg);
            color: var(--text-light);
            font-size: 0.8rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .sidebar-tags a:hover { background: var(--primary); color: #fff; }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), #4A3CB5);
            color: #fff;
            text-align: center;
        }
        .sidebar-cta h3 { color: #fff; justify-content: center; }
        .sidebar-cta p { font-size: 0.9rem; margin-bottom: 16px; opacity: 0.9; }
        .sidebar-cta .btn { background: #fff; color: var(--primary); }
        .sidebar-cta .btn:hover { background: var(--secondary-light); color: var(--text); }

        /* ===== Footer ===== */
        .footer {
            background: #1a1a2e;
            color: rgba(255,255,255,0.8);
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; font-size: 1.4rem; }
        .footer-brand .logo i { color: var(--primary-light); }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; opacity: 0.7; max-width: 360px; }
        .footer-social { display: flex; gap: 12px; margin-top: 20px; }
        .footer-social a {
            display: flex; align-items: center; justify-content: center;
            width: 40px; height: 40px; border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: rgba(255,255,255,0.7);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-3px); }
        .footer h4 { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 20px; }
        .footer-links { display: flex; flex-direction: column; gap: 10px; }
        .footer-links a { color: rgba(255,255,255,0.6); font-size: 0.9rem; transition: var(--transition); }
        .footer-links a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            display: flex; justify-content: space-between; align-items: center;
            padding: 24px 0; flex-wrap: wrap; gap: 12px;
            font-size: 0.85rem; opacity: 0.6;
        }
        .footer-bottom i { margin-right: 6px; }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            :root { --header-h: 64px; --spacing: 40px; }
            .nav-menu { display: none; position: absolute; top: var(--header-h); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(20px); flex-direction: column; padding: 16px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); }
            .nav-menu.open { display: flex; }
            .nav-item { width: 100%; justify-content: center; padding: 12px; }
            .nav-search { display: none; }
            .nav-toggle { display: block; }
            .article-title { font-size: 1.8rem; }
            .article-body { padding: 28px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-banner { padding: 60px 0 40px; padding-top: calc(var(--header-h) + 40px); }
            .article-title { font-size: 1.4rem; }
            .article-body { padding: 20px; border-radius: var(--radius-sm); }
            .article-body .content { font-size: 1rem; }
            .article-body .content h2 { font-size: 1.3rem; }
            .btn-lg { padding: 12px 24px; font-size: 0.95rem; }
            .logo span { font-size: 1.1rem; }
            .logo i { font-size: 1.2rem; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --color-primary: #6C5CE7;
            --color-primary-dark: #5A4BD1;
            --color-primary-light: #A29BFE;
            --color-secondary: #FD79A8;
            --color-accent: #FDCB6E;
            --color-bg: #0F0E17;
            --color-bg-alt: #1A1930;
            --color-bg-card: #222044;
            --color-bg-card-hover: #2A2855;
            --color-text: #F5F3FF;
            --color-text-muted: #A09BBE;
            --color-text-dim: #6E6A8A;
            --color-border: #2E2B52;
            --color-border-light: #3D3970;
            --color-success: #00D2A0;
            --color-warning: #FDCB6E;
            --color-danger: #FF6B6B;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.30);
            --shadow-lg: 0 14px 48px rgba(0, 0, 0, 0.40);
            --shadow-glow: 0 0 30px rgba(108, 92, 231, 0.20);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --space-xs: 6px;
            --space-sm: 12px;
            --space-md: 24px;
            --space-lg: 48px;
            --space-xl: 80px;
            --space-2xl: 120px;
            --max-width: 1260px;
            --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(--color-text);
            background: var(--color-bg);
            min-height: 100vh;
        }

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

        a:hover {
            color: var(--color-primary-light);
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--color-text);
        }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--space-md);
        }

        /* ===== Header / Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(15, 14, 23, 0.85);
            backdrop-filter: blur(16px) saturate(1.4);
            border-bottom: 1px solid var(--color-border);
            z-index: 1000;
            transition: background var(--transition), box-shadow var(--transition);
        }

        .header.scrolled {
            background: rgba(15, 14, 23, 0.96);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--space-md);
            height: 100%;
            gap: var(--space-md);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }

        .logo i {
            color: var(--color-primary-light);
            font-size: 26px;
            transition: transform var(--transition);
        }

        .logo:hover i {
            transform: rotate(-15deg) scale(1.05);
        }

        .logo span {
            background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
            flex: 1;
            justify-content: center;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 7px;
            padding: 10px 20px;
            border-radius: var(--radius-xl);
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-muted);
            transition: all var(--transition);
            white-space: nowrap;
            position: relative;
        }

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

        .nav-item:hover {
            color: var(--color-text);
            background: rgba(108, 92, 231, 0.10);
        }

        .nav-item.active {
            color: var(--color-text);
            background: rgba(108, 92, 231, 0.18);
            box-shadow: inset 0 0 0 1px rgba(108, 92, 231, 0.20);
        }

        .nav-item.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 4px;
            background: var(--color-primary-light);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            flex-shrink: 0;
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--color-bg-alt);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-xl);
            padding: 6px 16px 6px 14px;
            transition: all var(--transition);
            width: 180px;
        }

        .nav-search:focus-within {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15);
            background: var(--color-bg-card);
        }

        .nav-search i {
            color: var(--color-text-dim);
            font-size: 14px;
        }

        .nav-search input {
            flex: 1;
            background: transparent;
            border: none;
            color: var(--color-text);
            font-size: 14px;
            min-width: 0;
        }

        .nav-search input::placeholder {
            color: var(--color-text-dim);
        }

        .nav-toggle {
            display: none;
            font-size: 22px;
            color: var(--color-text);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }

        .nav-toggle:hover {
            background: var(--color-bg-alt);
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-xl);
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            white-space: nowrap;
            line-height: 1.2;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            color: #fff;
            box-shadow: 0 4px 16px rgba(108, 92, 231, 0.30);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(108, 92, 231, 0.40);
            color: #fff;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 10px rgba(108, 92, 231, 0.25);
        }

        .btn-secondary {
            background: var(--color-bg-card);
            color: var(--color-text);
            border: 1px solid var(--color-border-light);
        }

        .btn-secondary:hover {
            background: var(--color-bg-card-hover);
            border-color: var(--color-primary);
            transform: translateY(-2px);
            color: var(--color-text);
        }

        .btn-outline {
            background: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-border-light);
        }

        .btn-outline:hover {
            border-color: var(--color-primary-light);
            color: var(--color-primary-light);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
            border-radius: var(--radius-md);
        }

        .btn-lg {
            padding: 16px 38px;
            font-size: 17px;
            border-radius: var(--radius-xl);
        }

        .btn .fa-arrow-right {
            transition: transform var(--transition);
        }

        .btn:hover .fa-arrow-right {
            transform: translateX(4px);
        }

        /* ===== Hero / Banner ===== */
        .page-banner {
            position: relative;
            padding: calc(var(--header-height) + var(--space-xl)) 0 var(--space-xl);
            min-height: 360px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }

        .page-banner-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            filter: brightness(0.35) saturate(0.8);
            z-index: 0;
            transform: scale(1.05);
            transition: transform 8s ease;
        }

        .page-banner:hover .page-banner-bg {
            transform: scale(1.00);
        }

        .page-banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 14, 23, 0.85) 0%, rgba(26, 25, 48, 0.60) 50%, rgba(15, 14, 23, 0.85) 100%);
            z-index: 1;
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .page-banner h1 {
            font-size: 52px;
            font-weight: 900;
            letter-spacing: -1px;
            margin-bottom: var(--space-sm);
            background: linear-gradient(135deg, #fff 0%, var(--color-primary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-banner p {
            font-size: 20px;
            color: var(--color-text-muted);
            max-width: 680px;
            margin: 0 auto var(--space-md);
            line-height: 1.6;
        }

        .page-banner .banner-tags {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
        }

        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 18px;
            border-radius: var(--radius-xl);
            background: rgba(108, 92, 231, 0.15);
            border: 1px solid rgba(108, 92, 231, 0.20);
            font-size: 14px;
            color: var(--color-text-muted);
            transition: all var(--transition);
        }

        .banner-tag:hover {
            background: rgba(108, 92, 231, 0.25);
            color: var(--color-text);
            transform: translateY(-2px);
        }

        .banner-tag i {
            color: var(--color-primary-light);
            font-size: 12px;
        }

        /* ===== Section Common ===== */
        .section {
            padding: var(--space-xl) 0;
        }

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

        .section-header {
            text-align: center;
            margin-bottom: var(--space-lg);
        }

        .section-header h2 {
            font-size: 36px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 10px;
        }

        .section-header p {
            font-size: 17px;
            color: var(--color-text-muted);
            max-width: 580px;
            margin: 0 auto;
        }

        .section-header .section-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 16px;
            border-radius: var(--radius-xl);
            background: rgba(108, 92, 231, 0.12);
            color: var(--color-primary-light);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: var(--space-md);
        }

        .card-grid-4 {
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        }

        /* ===== Card ===== */
        .card {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--color-border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

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

        .card-image {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--color-bg-alt);
        }

        .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .card-image .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 14px;
            border-radius: var(--radius-xl);
            background: rgba(108, 92, 231, 0.85);
            backdrop-filter: blur(6px);
            font-size: 12px;
            font-weight: 600;
            color: #fff;
            letter-spacing: 0.3px;
        }

        .card-image .card-duration {
            position: absolute;
            bottom: 12px;
            right: 12px;
            padding: 4px 12px;
            border-radius: var(--radius-xl);
            background: rgba(0, 0, 0, 0.65);
            backdrop-filter: blur(6px);
            font-size: 12px;
            color: var(--color-text-muted);
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .card-body {
            padding: var(--space-md);
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
            transition: color var(--transition);
        }

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

        .card-body p {
            color: var(--color-text-muted);
            font-size: 14px;
            line-height: 1.6;
            flex: 1;
            margin-bottom: var(--space-sm);
        }

        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: var(--space-sm);
            border-top: 1px solid var(--color-border);
            font-size: 13px;
            color: var(--color-text-dim);
        }

        .card-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .card-meta i {
            font-size: 12px;
        }

        /* ===== Subcategory Tabs ===== */
        .subcategory-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            justify-content: center;
            margin-bottom: var(--space-lg);
        }

        .sub-tab {
            padding: 8px 22px;
            border-radius: var(--radius-xl);
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-muted);
            background: var(--color-bg-alt);
            border: 1px solid var(--color-border);
            transition: all var(--transition);
            cursor: pointer;
        }

        .sub-tab:hover {
            border-color: var(--color-primary);
            color: var(--color-text);
            background: rgba(108, 92, 231, 0.08);
        }

        .sub-tab.active {
            background: var(--color-primary);
            border-color: var(--color-primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(108, 92, 231, 0.30);
        }

        /* ===== Featured Article (large) ===== */
        .featured-article {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--space-lg);
            background: var(--color-bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border);
            margin-bottom: var(--space-lg);
            transition: all var(--transition);
        }

        .featured-article:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-lg);
        }

        .featured-article .featured-image {
            aspect-ratio: 4 / 3;
            overflow: hidden;
        }

        .featured-article .featured-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .featured-article:hover .featured-image img {
            transform: scale(1.04);
        }

        .featured-article .featured-body {
            padding: var(--space-lg);
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .featured-article .featured-body .badge-featured {
            display: inline-block;
            padding: 4px 16px;
            border-radius: var(--radius-xl);
            background: var(--color-accent);
            color: #1A1930;
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 12px;
            width: fit-content;
        }

        .featured-article .featured-body h2 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .featured-article .featured-body p {
            color: var(--color-text-muted);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: var(--space-md);
        }

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

        .stat-item {
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            padding: var(--space-md) var(--space-sm);
            border: 1px solid var(--color-border);
            transition: all var(--transition);
        }

        .stat-item:hover {
            border-color: var(--color-primary);
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        .stat-item .stat-number {
            font-size: 36px;
            font-weight: 900;
            background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }

        .stat-item .stat-label {
            font-size: 14px;
            color: var(--color-text-muted);
            margin-top: 4px;
        }

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

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

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--space-md) var(--space-md);
            font-weight: 600;
            font-size: 16px;
            cursor: pointer;
            transition: background var(--transition);
            gap: var(--space-sm);
        }

        .faq-question:hover {
            background: rgba(108, 92, 231, 0.04);
        }

        .faq-question i {
            color: var(--color-primary-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

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

        .faq-answer {
            padding: 0 var(--space-md) var(--space-md);
            color: var(--color-text-muted);
            font-size: 15px;
            line-height: 1.7;
            display: none;
        }

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

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-bg-alt) 0%, rgba(108, 92, 231, 0.08) 100%);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .cta-box {
            text-align: center;
            padding: var(--space-xl) 0;
        }

        .cta-box h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .cta-box p {
            color: var(--color-text-muted);
            font-size: 17px;
            max-width: 520px;
            margin: 0 auto var(--space-md);
        }

        .cta-box .cta-actions {
            display: flex;
            justify-content: center;
            gap: var(--space-sm);
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--color-bg-alt);
            border-top: 1px solid var(--color-border);
            padding: var(--space-xl) 0 var(--space-md);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--space-lg);
            margin-bottom: var(--space-lg);
        }

        .footer-brand .logo {
            font-size: 22px;
            margin-bottom: 12px;
        }

        .footer-brand p {
            color: var(--color-text-muted);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: var(--space-sm);
            max-width: 320px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            color: var(--color-text-muted);
            font-size: 18px;
            transition: all var(--transition);
        }

        .footer-social a:hover {
            background: var(--color-primary);
            border-color: var(--color-primary);
            color: #fff;
            transform: translateY(-3px);
        }

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

        .footer-links li {
            margin-bottom: 8px;
        }

        .footer-links a {
            color: var(--color-text-muted);
            font-size: 14px;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-links a:hover {
            color: var(--color-primary-light);
            transform: translateX(4px);
        }

        .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding-top: var(--space-md);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--space-sm);
            font-size: 13px;
            color: var(--color-text-dim);
        }

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

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .featured-article {
                grid-template-columns: 1fr;
            }

            .featured-article .featured-image {
                aspect-ratio: 16 / 9;
            }

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

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--space-md);
            }

            .page-banner h1 {
                font-size: 40px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
                --space-xl: 48px;
                --space-lg: 32px;
            }

            .nav-menu {
                position: fixed;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: rgba(15, 14, 23, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: var(--space-md);
                gap: 4px;
                border-bottom: 1px solid var(--color-border);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                pointer-events: none;
                box-shadow: var(--shadow-lg);
            }

            .nav-menu.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .nav-item {
                width: 100%;
                justify-content: flex-start;
                padding: 12px 18px;
                border-radius: var(--radius-sm);
            }

            .nav-item.active::after {
                display: none;
            }

            .nav-item.active {
                background: rgba(108, 92, 231, 0.15);
            }

            .nav-toggle {
                display: block;
            }

            .nav-search {
                width: 140px;
            }

            .nav-actions .btn-primary .btn-text {
                display: none;
            }

            .page-banner {
                min-height: 280px;
                padding: calc(var(--header-height) + var(--space-lg)) 0 var(--space-lg);
            }

            .page-banner h1 {
                font-size: 32px;
            }

            .page-banner p {
                font-size: 16px;
            }

            .section-header h2 {
                font-size: 28px;
            }

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

            .card-grid-4 {
                grid-template-columns: 1fr 1fr;
            }

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

            .stat-item .stat-number {
                font-size: 28px;
            }

            .featured-article .featured-body {
                padding: var(--space-md);
            }

            .featured-article .featured-body h2 {
                font-size: 22px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--space-md);
            }

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

            .cta-box h2 {
                font-size: 28px;
            }

            .subcategory-tabs {
                flex-wrap: nowrap;
                overflow-x: auto;
                padding-bottom: 4px;
                justify-content: flex-start;
                -webkit-overflow-scrolling: touch;
            }

            .sub-tab {
                flex-shrink: 0;
            }
        }

        @media (max-width: 520px) {
            .card-grid-4 {
                grid-template-columns: 1fr;
            }

            .page-banner h1 {
                font-size: 26px;
            }

            .page-banner p {
                font-size: 14px;
            }

            .section-header h2 {
                font-size: 24px;
            }

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

            .nav-search {
                width: 110px;
            }

            .nav-search input {
                font-size: 13px;
            }

            .btn-lg {
                padding: 14px 28px;
                font-size: 15px;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }

        .mt-md {
            margin-top: var(--space-md);
        }

        .mt-lg {
            margin-top: var(--space-lg);
        }

        .gap-sm {
            gap: var(--space-sm);
        }

        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
            height: 6px;
        }

        ::-webkit-scrollbar-track {
            background: var(--color-bg);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--color-border-light);
            border-radius: 12px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--color-text-dim);
        }

        /* Focus visible */
        :focus-visible {
            outline: 2px solid var(--color-primary-light);
            outline-offset: 2px;
        }

        /* Selection */
        ::selection {
            background: var(--color-primary);
            color: #fff;
        }