/* roulang page: index */
/* ===== Design Variables ===== */
    :root {
        --primary: #1a6b3c;
        --primary-dark: #13522d;
        --primary-light: #2d8a4e;
        --primary-bg: #eaf5ef;
        --secondary: #f5a623;
        --secondary-dark: #d48e1a;
        --secondary-light: #fce4b4;
        --accent: #ff6b35;
        --bg: #f4f7f5;
        --bg-card: #ffffff;
        --bg-dark: #0d1f14;
        --bg-sidebar: #0f281c;
        --text: #1a2a20;
        --text-light: #5a6d63;
        --text-white: #f0f7f3;
        --border: #dce4e0;
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-lg: 20px;
        --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
        --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
        --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
        --shadow-xl: 0 20px 60px rgba(0,0,0,0.16);
        --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --sidebar-width: 240px;
        --header-h: 64px;
        --max-width: 1200px;
        --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    }

    /* ===== 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);
        display: flex;
        min-height: 100vh;
    }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--primary-light); }
    a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
    img { max-width: 100%; height: auto; display: block; }
    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); }
    h1 { font-size: 2.8rem; letter-spacing: -0.02em; }
    h2 { font-size: 2rem; letter-spacing: -0.01em; }
    h3 { font-size: 1.35rem; }
    h4 { font-size: 1.1rem; }
    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: 48px; }
    .section-title h2 { margin-bottom: 12px; }
    .section-title p { max-width: 640px; margin: 0 auto; font-size: 1.1rem; }
    .text-center { text-align: center; }

    /* ===== Sidebar / Navigation ===== */
    .sidebar {
        position: fixed;
        top: 0; left: 0;
        width: var(--sidebar-width);
        height: 100vh;
        background: var(--bg-sidebar);
        color: var(--text-white);
        display: flex;
        flex-direction: column;
        z-index: 1000;
        transition: transform var(--transition);
        box-shadow: 2px 0 20px rgba(0,0,0,0.2);
    }
    .sidebar-brand {
        padding: 24px 20px 20px;
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .sidebar-brand a {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        color: #fff;
        text-decoration: none;
    }
    .sidebar-brand .brand-main {
        font-size: 1.5rem;
        font-weight: 800;
        letter-spacing: 0.01em;
        background: linear-gradient(135deg, #5adf8a 0%, #f5c542 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .sidebar-brand .brand-sub {
        font-size: 0.78rem;
        font-weight: 400;
        color: rgba(255,255,255,0.5);
        letter-spacing: 0.3em;
        margin-top: 2px;
        -webkit-text-fill-color: rgba(255,255,255,0.5);
    }
    .sidebar-nav {
        flex: 1;
        padding: 16px 12px;
        overflow-y: auto;
    }
    .sidebar-nav .nav-label {
        font-size: 0.7rem;
        text-transform: uppercase;
        letter-spacing: 0.12em;
        color: rgba(255,255,255,0.25);
        padding: 16px 12px 8px;
        font-weight: 600;
    }
    .sidebar-nav a {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 12px 16px;
        border-radius: 10px;
        color: rgba(255,255,255,0.7);
        font-size: 0.95rem;
        font-weight: 500;
        transition: var(--transition);
        margin-bottom: 2px;
        text-decoration: none;
    }
    .sidebar-nav a i { width: 20px; text-align: center; font-size: 1.1rem; }
    .sidebar-nav a:hover {
        background: rgba(255,255,255,0.08);
        color: #fff;
    }
    .sidebar-nav a.active {
        background: rgba(90, 223, 138, 0.15);
        color: #5adf8a;
        font-weight: 600;
    }
    .sidebar-footer {
        padding: 16px 20px 24px;
        border-top: 1px solid rgba(255,255,255,0.06);
        font-size: 0.75rem;
        color: rgba(255,255,255,0.3);
        text-align: center;
    }

    /* ===== Main Content ===== */
    .main-content {
        margin-left: var(--sidebar-width);
        flex: 1;
        min-height: 100vh;
        width: calc(100% - var(--sidebar-width));
    }

    /* ===== Mobile Header ===== */
    .mobile-header {
        display: none;
        position: fixed;
        top: 0; left: 0; right: 0;
        height: var(--header-h);
        background: var(--bg-sidebar);
        color: #fff;
        z-index: 999;
        padding: 0 16px;
        align-items: center;
        justify-content: space-between;
        box-shadow: 0 2px 12px rgba(0,0,0,0.15);
    }
    .mobile-header .brand-mobile {
        font-size: 1.2rem;
        font-weight: 700;
        background: linear-gradient(135deg, #5adf8a, #f5c542);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .mobile-header .hamburger {
        background: none;
        border: none;
        color: #fff;
        font-size: 1.6rem;
        padding: 4px 8px;
        border-radius: 6px;
        transition: var(--transition);
    }
    .mobile-header .hamburger:hover { background: rgba(255,255,255,0.1); }
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0; left: 0; right: 0; bottom: 0;
        background: rgba(0,0,0,0.5);
        z-index: 998;
        backdrop-filter: blur(4px);
    }

    /* ===== Hero ===== */
    .hero {
        position: relative;
        min-height: 580px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: linear-gradient(135deg, rgba(15,40,28,0.92) 0%, rgba(26,107,60,0.85) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        color: #fff;
        padding: 60px 24px;
        overflow: hidden;
    }
    .hero::after {
        content: '';
        position: absolute;
        bottom: 0; left: 0; right: 0;
        height: 120px;
        background: linear-gradient(to top, var(--bg), transparent);
        pointer-events: none;
    }
    .hero-content {
        position: relative;
        z-index: 2;
        max-width: 720px;
        text-align: center;
    }
    .hero-badge {
        display: inline-block;
        background: rgba(255,255,255,0.12);
        backdrop-filter: blur(8px);
        padding: 6px 20px;
        border-radius: 40px;
        font-size: 0.85rem;
        font-weight: 500;
        color: var(--secondary-light);
        letter-spacing: 0.05em;
        margin-bottom: 20px;
        border: 1px solid rgba(255,255,255,0.1);
    }
    .hero-content h1 {
        font-size: 3.4rem;
        font-weight: 800;
        color: #fff;
        margin-bottom: 8px;
        line-height: 1.15;
        letter-spacing: -0.02em;
    }
    .hero-content h1 span {
        background: linear-gradient(135deg, #5adf8a, #f5c542);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .hero-content .hero-sub {
        font-size: 1.2rem;
        color: rgba(255,255,255,0.7);
        margin-bottom: 32px;
        font-weight: 400;
    }
    .hero-actions {
        display: flex;
        gap: 16px;
        justify-content: center;
        flex-wrap: wrap;
    }
    .btn {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 14px 32px;
        border-radius: 40px;
        font-size: 1rem;
        font-weight: 600;
        transition: var(--transition);
        border: none;
        text-decoration: none;
        cursor: pointer;
    }
    .btn-primary {
        background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
        color: #1a2a20;
        box-shadow: 0 4px 16px rgba(245,166,35,0.35);
    }
    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 28px rgba(245,166,35,0.45);
        color: #1a2a20;
    }
    .btn-outline-light {
        background: transparent;
        border: 2px solid rgba(255,255,255,0.3);
        color: #fff;
    }
    .btn-outline-light:hover {
        background: rgba(255,255,255,0.1);
        border-color: #fff;
        color: #fff;
        transform: translateY(-2px);
    }
    .hero-stats {
        display: flex;
        gap: 40px;
        justify-content: center;
        margin-top: 40px;
        flex-wrap: wrap;
    }
    .hero-stat {
        text-align: center;
    }
    .hero-stat .num {
        font-size: 2rem;
        font-weight: 800;
        color: #fff;
        line-height: 1.2;
    }
    .hero-stat .num span { color: var(--secondary); }
    .hero-stat .label {
        font-size: 0.85rem;
        color: rgba(255,255,255,0.55);
        margin-top: 2px;
    }

    /* ===== Features ===== */
    .features-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .feature-card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 32px 28px;
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        border: 1px solid var(--border);
        text-align: center;
    }
    .feature-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
        border-color: var(--primary-bg);
    }
    .feature-card .icon {
        width: 60px;
        height: 60px;
        border-radius: 50%;
        background: var(--primary-bg);
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 18px;
        font-size: 1.6rem;
        color: var(--primary);
    }
    .feature-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
    .feature-card p { font-size: 0.92rem; margin-bottom: 0; }

    /* ===== Category Cards ===== */
    .category-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .category-card {
        position: relative;
        border-radius: var(--radius-md);
        overflow: hidden;
        background: var(--bg-card);
        box-shadow: var(--shadow-sm);
        transition: var(--transition);
        border: 1px solid var(--border);
        text-decoration: none;
        color: var(--text);
        display: block;
    }
    .category-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
        border-color: var(--primary-light);
        color: var(--text);
    }
    .category-card .card-img {
        width: 100%;
        height: 180px;
        object-fit: cover;
        background: var(--primary-bg);
    }
    .category-card .card-body {
        padding: 20px 22px 24px;
    }
    .category-card .card-body h3 {
        font-size: 1.1rem;
        margin-bottom: 6px;
    }
    .category-card .card-body p {
        font-size: 0.88rem;
        margin-bottom: 12px;
        color: var(--text-light);
    }
    .category-card .card-tag {
        display: inline-block;
        padding: 4px 14px;
        border-radius: 30px;
        font-size: 0.75rem;
        font-weight: 600;
        background: var(--primary-bg);
        color: var(--primary);
    }

    /* ===== Latest News / CMS List ===== */
    .news-list {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }
    .news-item {
        display: flex;
        gap: 18px;
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 20px;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border);
        transition: var(--transition);
        align-items: flex-start;
    }
    .news-item:hover {
        box-shadow: var(--shadow-md);
        border-color: var(--primary-bg);
    }
    .news-item .news-thumb {
        width: 80px;
        height: 80px;
        border-radius: var(--radius-sm);
        object-fit: cover;
        flex-shrink: 0;
        background: var(--primary-bg);
    }
    .news-item .news-info { flex: 1; min-width: 0; }
    .news-item .news-info .news-cat {
        display: inline-block;
        font-size: 0.7rem;
        font-weight: 600;
        color: var(--primary);
        background: var(--primary-bg);
        padding: 2px 12px;
        border-radius: 20px;
        margin-bottom: 6px;
    }
    .news-item .news-info h4 {
        font-size: 1rem;
        margin-bottom: 4px;
        line-height: 1.4;
    }
    .news-item .news-info h4 a {
        color: var(--text);
        text-decoration: none;
    }
    .news-item .news-info h4 a:hover { color: var(--primary); }
    .news-item .news-info .news-meta {
        font-size: 0.8rem;
        color: var(--text-light);
    }
    .news-item .news-info .news-desc {
        font-size: 0.85rem;
        color: var(--text-light);
        margin-top: 4px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-empty {
        grid-column: 1 / -1;
        text-align: center;
        padding: 40px 20px;
        color: var(--text-light);
        background: var(--bg-card);
        border-radius: var(--radius-md);
        border: 1px dashed var(--border);
    }
    .news-empty i { font-size: 2rem; color: var(--border); margin-bottom: 12px; display: block; }

    /* ===== Stats / Data Block ===== */
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
    }
    .stat-card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 28px 20px;
        text-align: center;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border);
        transition: var(--transition);
    }
    .stat-card:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-md);
    }
    .stat-card .stat-icon {
        font-size: 2rem;
        color: var(--primary);
        margin-bottom: 10px;
    }
    .stat-card .stat-num {
        font-size: 2.2rem;
        font-weight: 800;
        color: var(--text);
        line-height: 1.2;
    }
    .stat-card .stat-num span { color: var(--secondary); }
    .stat-card .stat-label {
        font-size: 0.9rem;
        color: var(--text-light);
        margin-top: 4px;
    }

    /* ===== Process / Steps ===== */
    .process-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
        counter-reset: step;
    }
    .step-card {
        text-align: center;
        position: relative;
        padding: 32px 16px;
        background: var(--bg-card);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border);
        transition: var(--transition);
    }
    .step-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
    }
    .step-card::before {
        counter-increment: step;
        content: counter(step);
        position: absolute;
        top: -14px;
        left: 50%;
        transform: translateX(-50%);
        width: 32px;
        height: 32px;
        border-radius: 50%;
        background: var(--primary);
        color: #fff;
        font-weight: 700;
        font-size: 0.9rem;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 4px 12px rgba(26,107,60,0.3);
    }
    .step-card .step-icon {
        font-size: 2.2rem;
        color: var(--primary);
        margin-bottom: 14px;
        margin-top: 8px;
    }
    .step-card h4 { font-size: 1.05rem; margin-bottom: 6px; }
    .step-card p { font-size: 0.88rem; margin-bottom: 0; }

    /* ===== FAQ ===== */
    .faq-list {
        max-width: 800px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .faq-item {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        border: 1px solid var(--border);
        overflow: hidden;
        transition: var(--transition);
    }
    .faq-item:hover { border-color: var(--primary-bg); }
    .faq-question {
        width: 100%;
        padding: 18px 24px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 1rem;
        font-weight: 600;
        color: var(--text);
        background: none;
        border: none;
        cursor: pointer;
        text-align: left;
        gap: 12px;
        transition: var(--transition);
    }
    .faq-question:hover { color: var(--primary); }
    .faq-question i { transition: transform 0.3s; color: var(--primary); font-size: 0.9rem; }
    .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: 400px;
        padding: 0 24px 20px;
    }

    /* ===== CTA ===== */
    .cta-section {
        background: linear-gradient(135deg, var(--bg-sidebar) 0%, var(--primary-dark) 100%);
        border-radius: var(--radius-lg);
        padding: 60px 40px;
        text-align: center;
        color: #fff;
        position: relative;
        overflow: hidden;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        top: -50%;
        right: -20%;
        width: 400px;
        height: 400px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(90,223,138,0.08) 0%, transparent 70%);
        pointer-events: none;
    }
    .cta-section h2 { color: #fff; font-size: 2rem; margin-bottom: 12px; }
    .cta-section p { color: rgba(255,255,255,0.7); max-width: 600px; margin: 0 auto 28px; font-size: 1.05rem; }
    .cta-section .btn-primary {
        font-size: 1.1rem;
        padding: 16px 40px;
    }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--bg-sidebar);
        color: rgba(255,255,255,0.6);
        padding: 48px 0 32px;
        margin-top: 40px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 32px;
        margin-bottom: 32px;
    }
    .footer-brand .brand-main {
        font-size: 1.3rem;
        font-weight: 800;
        background: linear-gradient(135deg, #5adf8a, #f5c542);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        display: inline-block;
        margin-bottom: 8px;
    }
    .footer-brand p { font-size: 0.88rem; color: rgba(255,255,255,0.45); max-width: 300px; }
    .footer-col h4 {
        color: #fff;
        font-size: 0.95rem;
        margin-bottom: 14px;
        font-weight: 600;
    }
    .footer-col a {
        display: block;
        color: rgba(255,255,255,0.5);
        font-size: 0.88rem;
        padding: 4px 0;
        text-decoration: none;
        transition: var(--transition);
    }
    .footer-col a:hover { color: #5adf8a; }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.06);
        padding-top: 20px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 0.82rem;
        color: rgba(255,255,255,0.35);
    }
    .footer-bottom a { color: rgba(255,255,255,0.4); }
    .footer-bottom a:hover { color: #5adf8a; }

    /* ===== Back to Top ===== */
    .back-top {
        position: fixed;
        bottom: 30px;
        right: 30px;
        width: 44px;
        height: 44px;
        border-radius: 50%;
        background: var(--primary);
        color: #fff;
        font-size: 1.2rem;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 4px 16px rgba(26,107,60,0.3);
        z-index: 99;
        opacity: 0;
        visibility: hidden;
        transform: translateY(20px);
        transition: var(--transition);
        border: none;
        cursor: pointer;
    }
    .back-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
    .back-top:hover { background: var(--primary-light); transform: translateY(-3px); }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .features-grid { grid-template-columns: repeat(2, 1fr); }
        .category-grid { grid-template-columns: repeat(2, 1fr); }
        .stats-grid { grid-template-columns: repeat(2, 1fr); }
        .process-grid { grid-template-columns: repeat(2, 1fr); }
        .footer-grid { grid-template-columns: 1fr 1fr; }
        .hero-content h1 { font-size: 2.6rem; }
    }

    @media (max-width: 768px) {
        .sidebar { transform: translateX(-100%); }
        .sidebar.open { transform: translateX(0); }
        .sidebar-overlay.active { display: block; }
        .mobile-header { display: flex; }
        .main-content { margin-left: 0; width: 100%; padding-top: var(--header-h); }
        .hero { min-height: 460px; padding: 40px 20px; }
        .hero-content h1 { font-size: 2rem; }
        .hero-content .hero-sub { font-size: 1rem; }
        .hero-stats { gap: 20px; }
        .hero-stat .num { font-size: 1.5rem; }
        .section { padding: 48px 0; }
        .section-title { margin-bottom: 32px; }
        .section-title h2 { font-size: 1.6rem; }
        .features-grid { grid-template-columns: 1fr; gap: 16px; }
        .category-grid { grid-template-columns: 1fr; gap: 16px; }
        .news-list { grid-template-columns: 1fr; gap: 16px; }
        .news-item { flex-direction: column; }
        .news-item .news-thumb { width: 100%; height: 140px; }
        .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
        .process-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
        .cta-section { padding: 40px 24px; border-radius: var(--radius-md); }
        .cta-section h2 { font-size: 1.5rem; }
        .footer-grid { grid-template-columns: 1fr; gap: 24px; }
        .footer-bottom { flex-direction: column; text-align: center; }
        .back-top { bottom: 20px; right: 20px; width: 40px; height: 40px; font-size: 1rem; }
        .faq-question { padding: 14px 18px; font-size: 0.92rem; }
        .faq-item.open .faq-answer { padding: 0 18px 16px; }
    }

    @media (max-width: 520px) {
        .hero-content h1 { font-size: 1.6rem; }
        .hero-content .hero-sub { font-size: 0.88rem; }
        .hero-actions .btn { padding: 12px 24px; font-size: 0.9rem; width: 100%; justify-content: center; }
        .hero-actions { flex-direction: column; }
        .stats-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
        .stat-card { padding: 20px 12px; }
        .stat-card .stat-num { font-size: 1.6rem; }
        .process-grid { grid-template-columns: 1fr; gap: 24px; }
        .feature-card { padding: 24px 20px; }
        .section-title h2 { font-size: 1.4rem; }
        .section { padding: 36px 0; }
        .container { padding: 0 16px; }
        .news-item { padding: 16px; }
        .category-card .card-body { padding: 16px 18px 20px; }
        .cta-section { padding: 28px 18px; }
        .cta-section h2 { font-size: 1.3rem; }
        .cta-section .btn-primary { width: 100%; justify-content: center; }
        .footer-grid { gap: 20px; }
    }

    /* ===== Utility ===== */
    .bg-alt { background: var(--primary-bg); }
    .bg-white { background: #fff; }
    .mt-0 { margin-top: 0; }
    .mb-0 { margin-bottom: 0; }
    .gap-8 { gap: 8px; }
    .flex-center { display: flex; align-items: center; justify-content: center; }
    .w-full { width: 100%; }

    /* ===== Smooth scroll padding ===== */
    .scroll-pad { scroll-margin-top: 80px; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #e8340e;
            --primary-dark: #c62b0a;
            --primary-light: #ff5a3a;
            --accent: #f7b731;
            --accent-dark: #e5a520;
            --bg-dark: #0d0d0f;
            --bg-card: #1a1a1e;
            --bg-card-hover: #22222a;
            --bg-surface: #121216;
            --text-main: #f0ece4;
            --text-secondary: #a8a49e;
            --text-muted: #6b6863;
            --border-color: #2a2a30;
            --border-light: #3a3a42;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.4);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.6);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --sidebar-width: 240px;
            --header-height: 0px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: 1rem; outline: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; width: 100%; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; letter-spacing: -0.02em; }

        /* ===== Layout: Sidebar + Main ===== */
        .app-wrapper {
            display: flex;
            min-height: 100vh;
        }

        /* ===== Sidebar Navigation ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: var(--bg-surface);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            padding: 24px 16px;
            overflow-y: auto;
            transition: transform var(--transition);
        }
        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 20px;
        }
        .sidebar-brand .brand-logo {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
            flex-shrink: 0;
        }
        .sidebar-brand .brand-name {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.2;
        }
        .sidebar-brand .brand-sub {
            font-size: 0.7rem;
            color: var(--text-muted);
            font-weight: 400;
            letter-spacing: 0.3px;
        }
        .nav-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: var(--text-muted);
            margin: 16px 0 8px 12px;
            font-weight: 600;
        }
        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 2px;
            flex: 1;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
            text-decoration: none;
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 1rem;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .sidebar-nav a:hover {
            background: var(--bg-card);
            color: var(--text-main);
        }
        .sidebar-nav a:hover i {
            color: var(--primary-light);
        }
        .sidebar-nav a.active {
            background: var(--bg-card);
            color: var(--primary-light);
            border-left: 3px solid var(--primary);
        }
        .sidebar-nav a.active i {
            color: var(--primary-light);
        }
        .sidebar-footer {
            padding-top: 16px;
            border-top: 1px solid var(--border-color);
            margin-top: auto;
            font-size: 0.7rem;
            color: var(--text-muted);
            text-align: center;
        }

        /* ===== Main Content Area ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        .main-body {
            flex: 1;
            padding: 40px 0 60px;
        }

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            padding: 60px 0 40px;
            background: linear-gradient(135deg, var(--bg-surface) 0%, var(--bg-card) 100%);
            border-bottom: 1px solid var(--border-color);
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(232,52,14,0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .article-banner .container {
            position: relative;
            z-index: 1;
        }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a {
            color: var(--text-secondary);
        }
        .article-breadcrumb a:hover {
            color: var(--primary-light);
        }
        .article-breadcrumb span {
            color: var(--text-muted);
        }
        .article-breadcrumb .sep {
            color: var(--border-light);
        }
        .article-category-badge {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 50px;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }
        .article-title {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: -0.03em;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .article-meta i {
            margin-right: 6px;
            color: var(--primary-light);
        }
        .article-meta .meta-item {
            display: flex;
            align-items: center;
        }

        /* ===== Article Content ===== */
        .article-content-wrapper {
            max-width: 840px;
            margin: 0 auto;
        }
        .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-secondary);
        }
        .article-body p {
            margin-bottom: 1.4em;
        }
        .article-body h2 {
            font-size: 1.6rem;
            color: var(--text-main);
            margin-top: 2em;
            margin-bottom: 0.8em;
            padding-bottom: 0.4em;
            border-bottom: 1px solid var(--border-color);
        }
        .article-body h3 {
            font-size: 1.25rem;
            color: var(--text-main);
            margin-top: 1.6em;
            margin-bottom: 0.6em;
        }
        .article-body ul, .article-body ol {
            padding-left: 1.6em;
            margin-bottom: 1.4em;
        }
        .article-body li {
            margin-bottom: 0.4em;
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            margin: 1.6em 0;
            background: var(--bg-card);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body img {
            margin: 1.6em 0;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }
        .article-body a {
            color: var(--primary-light);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover {
            color: var(--accent);
        }
        .article-body code {
            background: var(--bg-card);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--accent);
        }
        .article-body pre {
            background: var(--bg-card);
            padding: 20px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 1.6em 0;
            border: 1px solid var(--border-color);
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
        }
        .article-tags .tag {
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 0.8rem;
            padding: 6px 16px;
            border-radius: 50px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-tags .tag:hover {
            background: var(--bg-card-hover);
            color: var(--primary-light);
            border-color: var(--primary);
        }

        /* ===== Article Nav ===== */
        .article-nav-links {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            flex-wrap: wrap;
        }
        .article-nav-links a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 0.9rem;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            max-width: 48%;
        }
        .article-nav-links a:hover {
            background: var(--bg-card-hover);
            color: var(--text-main);
            border-color: var(--primary);
        }
        .article-nav-links .nav-next {
            text-align: right;
        }

        /* ===== Related Section ===== */
        .related-section {
            margin-top: 60px;
            padding-top: 40px;
            border-top: 1px solid var(--border-color);
        }
        .related-section h3 {
            font-size: 1.4rem;
            color: var(--text-main);
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-section h3 i {
            color: var(--primary-light);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 20px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }
        .related-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 16px 18px;
        }
        .related-card .card-body h4 {
            font-size: 1rem;
            color: var(--text-main);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body p {
            font-size: 0.85rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 18px;
            border-top: 1px solid var(--border-color);
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        .related-card .card-meta .cat {
            color: var(--primary-light);
            font-weight: 600;
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .not-found-box .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-box .btn-back:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-surface);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand .brand-main {
            display: block;
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 0.9rem;
            color: var(--text-main);
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: var(--text-secondary);
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-col a i {
            margin-right: 6px;
            color: var(--primary-light);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-secondary);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== Mobile Toggle ===== */
        .sidebar-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            color: var(--text-main);
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .sidebar-toggle:hover {
            background: var(--bg-card-hover);
            border-color: var(--primary);
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0,0,0,0.6);
            z-index: 999;
            backdrop-filter: blur(4px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .article-title {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            :root {
                --sidebar-width: 260px;
            }
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay.open {
                display: block;
            }
            .sidebar-toggle {
                display: flex;
            }
            .main-content {
                margin-left: 0;
            }
            .main-body {
                padding: 24px 0 40px;
            }
            .article-banner {
                padding: 40px 0 28px;
            }
            .article-title {
                font-size: 1.6rem;
            }
            .article-meta {
                gap: 12px;
                font-size: 0.8rem;
            }
            .article-body {
                font-size: 0.98rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .article-nav-links a {
                max-width: 100%;
                width: 100%;
            }
            .article-nav-links {
                flex-direction: column;
            }
            .related-grid {
                grid-template-columns: 1fr 1fr;
            }
            .not-found-box {
                padding: 40px 20px;
            }
            .not-found-box i {
                font-size: 3rem;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .article-title {
                font-size: 1.3rem;
            }
            .article-breadcrumb {
                font-size: 0.75rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .sidebar {
                padding: 16px 12px;
            }
            .sidebar-brand .brand-name {
                font-size: 1rem;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a6b3c;
            --primary-light: #238b4e;
            --primary-dark: #0f4d2a;
            --primary-bg: #eaf7f0;
            --accent: #f5b342;
            --accent-light: #f8c86a;
            --accent-dark: #d4942e;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-sidebar: #0f1e2b;
            --bg-sidebar-hover: #1a2f40;
            --bg-footer: #0f1e2b;
            --text-primary: #1a2b3c;
            --text-secondary: #4a5a6a;
            --text-light: #8a9aaa;
            --text-white: #f0f4f8;
            --text-sidebar: #b0c4d8;
            --border-light: #e2e8f0;
            --border-card: #e8edf2;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.10);
            --shadow-btn: 0 4px 14px rgba(26, 107, 60, 0.30);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --sidebar-width: 240px;
            --header-height: 64px;
            --max-width: 1200px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-base);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--bg-body);
            display: flex;
            min-height: 100vh;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 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;
            outline: none;
            border: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 600;
            color: var(--text-primary);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 左侧导航 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            color: var(--text-sidebar);
            display: flex;
            flex-direction: column;
            padding: 32px 0 24px 0;
            z-index: 1000;
            transition: transform var(--transition);
            overflow-y: auto;
        }
        .sidebar-brand {
            padding: 0 20px 28px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            margin-bottom: 20px;
        }
        .sidebar-brand .brand-main {
            font-size: 20px;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-brand .brand-main i {
            color: var(--accent);
            font-size: 22px;
        }
        .sidebar-brand .brand-sub {
            font-size: 13px;
            color: var(--text-sidebar);
            margin-top: 4px;
            opacity: 0.7;
        }
        .nav-label {
            font-size: 11px;
            text-transform: uppercase;
            letter-spacing: 1.2px;
            color: rgba(255, 255, 255, 0.3);
            padding: 0 20px;
            margin-bottom: 10px;
            font-weight: 500;
        }
        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 2px;
            padding: 0 12px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            color: var(--text-sidebar);
            font-size: 15px;
            font-weight: 500;
            transition: background var(--transition), color var(--transition);
        }
        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: rgba(255, 255, 255, 0.35);
            transition: color var(--transition);
        }
        .sidebar-nav a:hover {
            background: var(--bg-sidebar-hover);
            color: #ffffff;
        }
        .sidebar-nav a:hover i {
            color: var(--accent);
        }
        .sidebar-nav a.active {
            background: var(--primary);
            color: #ffffff;
        }
        .sidebar-nav a.active i {
            color: #ffffff;
        }
        .sidebar-footer {
            margin-top: auto;
            padding: 20px 20px 0 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.25);
            text-align: center;
        }

        /* ===== 主内容区 ===== */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== 移动端顶部栏 ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: var(--bg-sidebar);
            color: #ffffff;
            padding: 0 20px;
            align-items: center;
            justify-content: space-between;
            z-index: 1001;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
        }
        .mobile-header .brand-main {
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-header .brand-main i {
            color: var(--accent);
        }
        .menu-toggle {
            background: transparent;
            color: #ffffff;
            font-size: 24px;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
        }
        .sidebar-overlay.show {
            display: block;
        }

        /* ===== Hero / 页面横幅 ===== */
        .page-hero {
            position: relative;
            padding: 80px 0 72px 0;
            background: linear-gradient(135deg, #0f1e2b 0%, #1a3a4a 60%, #1f4d3a 100%);
            color: var(--text-white);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero h1 {
            font-size: 38px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .page-hero h1 i {
            color: var(--accent);
            margin-right: 12px;
        }
        .page-hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 640px;
            line-height: 1.7;
        }
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 28px;
            align-items: center;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.65);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb span {
            color: rgba(255, 255, 255, 0.85);
        }
        .breadcrumb i {
            font-size: 10px;
            color: rgba(255, 255, 255, 0.3);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 72px 0;
        }
        .section-title {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.2px;
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 600px;
            line-height: 1.7;
        }
        .section-header {
            margin-bottom: 44px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .section-header.centered {
            align-items: center;
            text-align: center;
        }
        .section-header.centered .section-subtitle {
            max-width: 560px;
        }

        /* ===== 卡片通用 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        /* ===== 步骤流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 28px;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-card);
            padding: 32px 24px 28px;
            text-align: center;
            position: relative;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }
        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 22px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px auto;
            transition: background var(--transition), color var(--transition);
        }
        .step-card:hover .step-number {
            background: var(--primary);
            color: #ffffff;
        }
        .step-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== 功能卡片网格 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-card);
            padding: 28px 24px;
            display: flex;
            gap: 18px;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            flex-shrink: 0;
            border-radius: var(--radius-sm);
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .feature-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== 图文区块 ===== */
        .media-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .media-block.reverse {
            direction: rtl;
        }
        .media-block.reverse>* {
            direction: ltr;
        }
        .media-image img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .media-content h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .media-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .media-content ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .media-content ul li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: var(--text-secondary);
        }
        .media-content ul li i {
            color: var(--primary);
            margin-top: 3px;
            font-size: 14px;
        }

        /* ===== 安全提示区块 ===== */
        .safety-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 24px;
        }
        .safety-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border-left: 4px solid var(--primary);
            padding: 24px 22px;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .safety-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .safety-card .icon-wrap {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: #fef3e7;
            color: var(--accent-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 14px;
        }
        .safety-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .safety-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-card);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            width: 100%;
            padding: 20px 24px;
            background: transparent;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: #f5f8fb;
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-light);
            transition: transform var(--transition);
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            background: #fafcfe;
        }
        .faq-answer.open {
            max-height: 300px;
            padding: 0 24px 20px 24px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            color: #ffffff;
            text-align: center;
            padding: 72px 0;
        }
        .cta-section h2 {
            font-size: 32px;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 540px;
            margin: 0 auto 32px auto;
        }
        .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 16px;
            cursor: pointer;
            transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
            border: none;
            background: transparent;
            line-height: 1.2;
        }
        .btn-primary {
            background: var(--accent);
            color: #1a2b3c;
            box-shadow: var(--shadow-btn);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            color: #1a2b3c;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 179, 66, 0.35);
        }
        .btn-outline-light {
            border: 2px solid rgba(255, 255, 255, 0.5);
            color: #ffffff;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #ffffff;
            color: #ffffff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 10px 22px;
            font-size: 14px;
        }

        /* ===== 标签 / 徽章 ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 500;
            background: var(--primary-bg);
            color: var(--primary);
        }
        .badge-accent {
            background: #fef3e7;
            color: var(--accent-dark);
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 60px;
            height: 4px;
            border-radius: 4px;
            background: var(--accent);
            margin: 16px 0 20px 0;
        }
        .divider.centered {
            margin: 16px auto 20px auto;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-footer);
            color: var(--text-sidebar);
            padding: 56px 0 28px 0;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.3fr;
            gap: 36px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .brand-main {
            font-size: 20px;
            font-weight: 700;
            color: #ffffff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            padding: 5px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-col a i {
            width: 18px;
            margin-right: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.3);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .media-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .media-block.reverse {
                direction: ltr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-header {
                display: flex;
            }
            .main-wrapper {
                margin-left: 0;
                padding-top: var(--header-height);
            }
            .page-hero {
                padding: 60px 0 52px 0;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero p {
                font-size: 16px;
            }
            .section {
                padding: 52px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .safety-grid {
                grid-template-columns: 1fr;
            }
            .media-content h2 {
                font-size: 22px;
            }
            .cta-section h2 {
                font-size: 24px;
            }
            .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-answer {
                font-size: 14px;
            }
            .container {
                padding: 0 16px;
            }
            .feature-card {
                flex-direction: column;
                align-items: flex-start;
            }
            .step-card {
                padding: 24px 16px;
            }
        }

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .page-hero h1 {
                font-size: 22px;
            }
            .section-title {
                font-size: 20px;
            }
            .page-hero p {
                font-size: 14px;
            }
            .badge {
                font-size: 12px;
                padding: 3px 10px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
            .mobile-header .brand-main {
                font-size: 16px;
            }
            .sidebar {
                width: 100%;
            }
        }

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