/* roulang page: index */
/* ===== Design Variables ===== */
    :root {
        --primary: #1B1B2F;
        --primary-light: #2D2D44;
        --primary-gradient: linear-gradient(135deg, #1B1B2F 0%, #2D2D44 100%);
        --secondary: #FF6B35;
        --secondary-light: #FF8A5C;
        --secondary-dark: #E55A2B;
        --accent: #6C5CE7;
        --accent-light: #8B7CF0;
        --bg: #F5F6FA;
        --bg-alt: #EBEDF5;
        --bg-white: #FFFFFF;
        --bg-card: #FFFFFF;
        --bg-dark: #0F0E17;
        --text: #1A1A2E;
        --text-light: #4A4A5A;
        --text-muted: #8E8E9A;
        --text-white: #FFFFFF;
        --text-white-muted: rgba(255,255,255,0.7);
        --border: #E8E8F0;
        --border-light: #F0F0F5;
        --radius: 16px;
        --radius-sm: 10px;
        --radius-lg: 24px;
        --shadow: 0 8px 30px rgba(0,0,0,0.06);
        --shadow-hover: 0 16px 48px rgba(0,0,0,0.12);
        --shadow-card: 0 4px 16px rgba(0,0,0,0.04);
        --shadow-nav: 0 2px 20px rgba(0,0,0,0.06);
        --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        --max-width: 1200px;
        --header-height: 72px;
        --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        --font-size-sm: 0.875rem;
        --font-size-base: 1rem;
        --font-size-lg: 1.125rem;
        --font-size-xl: 1.25rem;
        --font-size-2xl: 1.5rem;
        --font-size-3xl: 2rem;
        --font-size-4xl: 2.5rem;
        --font-size-5xl: 3.25rem;
        --spacing-xs: 8px;
        --spacing-sm: 16px;
        --spacing-md: 24px;
        --spacing-lg: 40px;
        --spacing-xl: 64px;
        --spacing-2xl: 96px;
    }

    /* ===== 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-family);
        font-size: var(--font-size-base);
        line-height: 1.7;
        color: var(--text);
        background: var(--bg);
        min-height: 100vh;
        overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: inherit; text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--secondary); }
    a:focus-visible { outline: 2px solid var(--secondary); outline-offset: 2px; border-radius: 4px; }
    button { cursor: pointer; font-family: inherit; border: none; background: none; transition: var(--transition); }
    button:focus-visible { outline: 2px solid var(--secondary); outline-offset: 2px; border-radius: 8px; }
    input, textarea { font-family: inherit; transition: var(--transition); }
    input:focus-visible, textarea:focus-visible { outline: 2px solid var(--secondary); outline-offset: 0; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
    p { margin-bottom: 1rem; }
    .container {
        width: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 var(--spacing-md);
    }

    /* ===== Navigation ===== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        height: var(--header-height);
        background: rgba(255,255,255,0.92);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border-light);
        box-shadow: var(--shadow-nav);
        transition: var(--transition);
    }
    .site-header.scrolled { background: rgba(255,255,255,0.98); box-shadow: 0 4px 30px rgba(0,0,0,0.08); }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 var(--spacing-md);
        gap: var(--spacing-sm);
    }
    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }
    .logo-icon {
        width: 36px;
        height: 36px;
        background: var(--secondary);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        font-size: 1.2rem;
        font-weight: 800;
        box-shadow: 0 4px 12px rgba(255,107,53,0.3);
    }
    .logo-text {
        font-size: 1.35rem;
        font-weight: 800;
        background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        letter-spacing: -0.5px;
    }
    .nav-main {
        display: flex;
        align-items: center;
        gap: var(--spacing-xs);
    }
    .nav-main a {
        padding: 8px 20px;
        border-radius: 100px;
        font-size: var(--font-size-sm);
        font-weight: 500;
        color: var(--text-light);
        transition: var(--transition);
        position: relative;
        white-space: nowrap;
    }
    .nav-main a:hover { color: var(--primary); background: var(--bg-alt); }
    .nav-main a.active {
        color: var(--text-white);
        background: var(--primary);
        box-shadow: 0 4px 16px rgba(27,27,47,0.2);
    }
    .nav-main a.active:hover { background: var(--primary-light); }
    .header-actions {
        display: flex;
        align-items: center;
        gap: var(--spacing-xs);
        flex-shrink: 0;
    }
    .search-toggle {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text-light);
        font-size: 1.1rem;
        background: var(--bg-alt);
        transition: var(--transition);
    }
    .search-toggle:hover { background: var(--border); color: var(--primary); }
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 10px 24px;
        border-radius: 100px;
        font-size: var(--font-size-sm);
        font-weight: 600;
        transition: var(--transition);
        white-space: nowrap;
        line-height: 1.4;
    }
    .btn-primary {
        background: var(--secondary);
        color: white;
        box-shadow: 0 4px 16px rgba(255,107,53,0.3);
    }
    .btn-primary:hover { background: var(--secondary-light); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(255,107,53,0.4); color: white; }
    .btn-primary:active { transform: translateY(0); }
    .btn-outline {
        background: transparent;
        color: var(--text-light);
        border: 1.5px solid var(--border);
    }
    .btn-outline:hover { border-color: var(--secondary); color: var(--secondary); background: rgba(255,107,53,0.04); }
    .btn-accent {
        background: var(--accent);
        color: white;
        box-shadow: 0 4px 16px rgba(108,92,231,0.3);
    }
    .btn-accent:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(108,92,231,0.4); color: white; }
    .btn-lg {
        padding: 14px 36px;
        font-size: var(--font-size-base);
        border-radius: 100px;
    }
    .btn-sm {
        padding: 6px 16px;
        font-size: var(--font-size-sm);
    }

    /* Mobile menu */
    .mobile-menu-btn {
        display: none;
        width: 40px;
        height: 40px;
        border-radius: 50%;
        align-items: center;
        justify-content: center;
        background: var(--bg-alt);
        color: var(--text);
        font-size: 1.2rem;
        transition: var(--transition);
    }
    .mobile-menu-btn:hover { background: var(--border); }
    .mobile-nav {
        display: none;
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow);
        z-index: 999;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.3s ease;
    }
    .mobile-nav.open { max-height: 400px; padding: var(--spacing-md); }
    .mobile-nav a {
        display: block;
        padding: 12px 16px;
        border-radius: var(--radius-sm);
        font-weight: 500;
        color: var(--text-light);
        transition: var(--transition);
    }
    .mobile-nav a:hover { background: var(--bg-alt); color: var(--primary); }
    .mobile-nav a.active { background: var(--primary); color: white; }
    .mobile-nav .btn { margin-top: var(--spacing-sm); width: 100%; justify-content: center; }

    /* ===== Hero Section ===== */
    .hero {
        position: relative;
        min-height: 88vh;
        display: flex;
        align-items: center;
        padding-top: var(--header-height);
        overflow: hidden;
        background: var(--primary-gradient);
    }
    .hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        opacity: 0.25;
        z-index: 1;
    }
    .hero::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(27,27,47,0.88) 0%, rgba(45,45,68,0.72) 50%, rgba(27,27,47,0.88) 100%);
        z-index: 2;
    }
    .hero-particles {
        position: absolute;
        inset: 0;
        z-index: 3;
        pointer-events: none;
        overflow: hidden;
    }
    .hero-particles span {
        position: absolute;
        width: 6px;
        height: 6px;
        background: rgba(255,255,255,0.08);
        border-radius: 50%;
        animation: float 20s infinite ease-in-out;
    }
    .hero-particles span:nth-child(1) { top: 20%; left: 10%; animation-delay: 0s; width: 8px; height: 8px; }
    .hero-particles span:nth-child(2) { top: 60%; left: 80%; animation-delay: 3s; }
    .hero-particles span:nth-child(3) { top: 30%; left: 60%; animation-delay: 6s; width: 10px; height: 10px; }
    .hero-particles span:nth-child(4) { top: 70%; left: 30%; animation-delay: 9s; }
    .hero-particles span:nth-child(5) { top: 10%; left: 90%; animation-delay: 12s; width: 8px; height: 8px; }
    .hero-particles span:nth-child(6) { top: 80%; left: 50%; animation-delay: 15s; }
    @keyframes float {
        0%, 100% { transform: translateY(0) scale(1); opacity: 0.3; }
        50% { transform: translateY(-40px) scale(1.5); opacity: 0.8; }
    }
    .hero-content {
        position: relative;
        z-index: 4;
        max-width: 860px;
        margin: 0 auto;
        text-align: center;
        padding: var(--spacing-xl) var(--spacing-md);
    }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 6px 20px;
        border-radius: 100px;
        background: rgba(255,255,255,0.1);
        border: 1px solid rgba(255,255,255,0.15);
        color: var(--text-white-muted);
        font-size: var(--font-size-sm);
        font-weight: 500;
        margin-bottom: var(--spacing-md);
        backdrop-filter: blur(8px);
    }
    .hero-badge i { color: var(--secondary); }
    .hero h1 {
        font-size: var(--font-size-5xl);
        font-weight: 900;
        color: var(--text-white);
        margin-bottom: var(--spacing-md);
        letter-spacing: -1px;
        line-height: 1.15;
    }
    .hero h1 span { background: linear-gradient(135deg, var(--secondary) 0%, #FFB347 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
    .hero p {
        font-size: var(--font-size-lg);
        color: var(--text-white-muted);
        max-width: 640px;
        margin: 0 auto var(--spacing-lg);
        line-height: 1.8;
    }
    .hero-search {
        display: flex;
        max-width: 560px;
        margin: 0 auto var(--spacing-lg);
        background: rgba(255,255,255,0.08);
        border-radius: 100px;
        border: 1px solid rgba(255,255,255,0.12);
        overflow: hidden;
        backdrop-filter: blur(8px);
        transition: var(--transition);
    }
    .hero-search:focus-within { border-color: var(--secondary); background: rgba(255,255,255,0.12); box-shadow: 0 0 0 4px rgba(255,107,53,0.15); }
    .hero-search input {
        flex: 1;
        padding: 14px 24px;
        background: transparent;
        border: none;
        color: var(--text-white);
        font-size: var(--font-size-base);
        outline: none;
    }
    .hero-search input::placeholder { color: var(--text-white-muted); }
    .hero-search button {
        padding: 14px 28px;
        background: var(--secondary);
        color: white;
        border: none;
        font-weight: 600;
        font-size: var(--font-size-base);
        transition: var(--transition);
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .hero-search button:hover { background: var(--secondary-light); }
    .hero-stats {
        display: flex;
        justify-content: center;
        gap: var(--spacing-lg);
        flex-wrap: wrap;
        margin-top: var(--spacing-md);
    }
    .hero-stat {
        text-align: center;
        color: var(--text-white);
    }
    .hero-stat .num {
        font-size: var(--font-size-3xl);
        font-weight: 900;
        color: var(--secondary);
        line-height: 1.2;
    }
    .hero-stat .label {
        font-size: var(--font-size-sm);
        color: var(--text-white-muted);
        margin-top: 4px;
    }
    .hero-cta {
        display: flex;
        gap: var(--spacing-sm);
        justify-content: center;
        flex-wrap: wrap;
        margin-top: var(--spacing-md);
    }

    /* ===== Section Shared ===== */
    .section {
        padding: var(--spacing-2xl) 0;
        position: relative;
    }
    .section-alt { background: var(--bg-alt); }
    .section-white { background: var(--bg-white); }
    .section-dark { background: var(--bg-dark); color: var(--text-white); }
    .section-header {
        text-align: center;
        max-width: 720px;
        margin: 0 auto var(--spacing-xl);
    }
    .section-header h2 {
        font-size: var(--font-size-3xl);
        font-weight: 800;
        margin-bottom: var(--spacing-sm);
        letter-spacing: -0.5px;
    }
    .section-header p {
        font-size: var(--font-size-lg);
        color: var(--text-muted);
        line-height: 1.8;
    }
    .section-header .badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 4px 16px;
        border-radius: 100px;
        background: rgba(255,107,53,0.1);
        color: var(--secondary);
        font-size: var(--font-size-sm);
        font-weight: 600;
        margin-bottom: var(--spacing-sm);
    }

    /* ===== Features Section ===== */
    .features-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-md);
    }
    .feature-card {
        background: var(--bg-card);
        border-radius: var(--radius);
        padding: var(--spacing-lg);
        box-shadow: var(--shadow-card);
        border: 1px solid var(--border-light);
        transition: var(--transition);
        text-align: center;
    }
    .feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--border); }
    .feature-icon {
        width: 64px;
        height: 64px;
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto var(--spacing-sm);
        font-size: 1.6rem;
        color: white;
    }
    .feature-icon.orange { background: linear-gradient(135deg, var(--secondary), #FFB347); }
    .feature-icon.purple { background: linear-gradient(135deg, var(--accent), #A29BFE); }
    .feature-icon.teal { background: linear-gradient(135deg, #00CEC9, #55EFC4); }
    .feature-card h3 { font-size: var(--font-size-xl); margin-bottom: var(--spacing-xs); }
    .feature-card p { color: var(--text-muted); font-size: var(--font-size-sm); margin-bottom: 0; }

    /* ===== Category Section ===== */
    .category-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-md);
    }
    .category-card {
        position: relative;
        border-radius: var(--radius);
        overflow: hidden;
        background: var(--bg-card);
        box-shadow: var(--shadow-card);
        border: 1px solid var(--border-light);
        transition: var(--transition);
        aspect-ratio: 4/3;
        display: flex;
        align-items: flex-end;
    }
    .category-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
    .category-card img {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: var(--transition-slow);
    }
    .category-card:hover img { transform: scale(1.08); }
    .category-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(0deg, rgba(27,27,47,0.85) 0%, rgba(27,27,47,0.15) 60%, rgba(27,27,47,0.1) 100%);
        z-index: 1;
    }
    .category-info {
        position: relative;
        z-index: 2;
        padding: var(--spacing-md);
        color: white;
        width: 100%;
    }
    .category-info h3 { font-size: var(--font-size-xl); color: white; margin-bottom: 4px; }
    .category-info p { font-size: var(--font-size-sm); color: var(--text-white-muted); margin-bottom: 0; }
    .category-tag {
        display: inline-block;
        padding: 2px 12px;
        border-radius: 100px;
        background: rgba(255,107,53,0.25);
        color: var(--secondary);
        font-size: 0.75rem;
        font-weight: 600;
        margin-bottom: var(--spacing-xs);
        border: 1px solid rgba(255,107,53,0.2);
    }

    /* ===== Latest Posts Section ===== */
    .posts-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    .post-card {
        background: var(--bg-card);
        border-radius: var(--radius);
        overflow: hidden;
        box-shadow: var(--shadow-card);
        border: 1px solid var(--border-light);
        transition: var(--transition);
        display: flex;
        flex-direction: column;
    }
    .post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    .post-card .thumb {
        width: 100%;
        height: 200px;
        object-fit: cover;
        transition: var(--transition-slow);
    }
    .post-card:hover .thumb { transform: scale(1.03); }
    .post-card .body {
        padding: var(--spacing-md);
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .post-card .meta {
        display: flex;
        align-items: center;
        gap: var(--spacing-sm);
        font-size: var(--font-size-sm);
        color: var(--text-muted);
        margin-bottom: var(--spacing-xs);
    }
    .post-card .meta .cat {
        padding: 2px 12px;
        border-radius: 100px;
        background: rgba(108,92,231,0.1);
        color: var(--accent);
        font-weight: 600;
        font-size: 0.75rem;
    }
    .post-card h3 {
        font-size: var(--font-size-lg);
        font-weight: 700;
        margin-bottom: var(--spacing-xs);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        line-height: 1.4;
    }
    .post-card h3 a { color: var(--text); }
    .post-card h3 a:hover { color: var(--secondary); }
    .post-card .excerpt {
        font-size: var(--font-size-sm);
        color: var(--text-muted);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: var(--spacing-sm);
        flex: 1;
    }
    .post-card .footer-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: var(--font-size-sm);
        color: var(--text-muted);
        border-top: 1px solid var(--border-light);
        padding-top: var(--spacing-sm);
    }
    .post-card .footer-meta i { margin-right: 4px; }
    .empty-posts {
        grid-column: 1 / -1;
        text-align: center;
        padding: var(--spacing-xl);
        color: var(--text-muted);
        font-size: var(--font-size-lg);
        background: var(--bg-card);
        border-radius: var(--radius);
        border: 1px dashed var(--border);
    }
    .empty-posts i { font-size: 2.5rem; color: var(--border); margin-bottom: var(--spacing-sm); display: block; }

    /* ===== Features Alt (图文) ===== */
    .feature-alt-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
        align-items: center;
    }
    .feature-alt-image {
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--shadow-hover);
        position: relative;
    }
    .feature-alt-image img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4/3; transition: var(--transition-slow); }
    .feature-alt-image:hover img { transform: scale(1.04); }
    .feature-alt-image::after {
        content: '';
        position: absolute;
        inset: 0;
        border-radius: var(--radius-lg);
        box-shadow: inset 0 0 0 1px rgba(255,255,255,0.05);
    }
    .feature-alt-text h2 { font-size: var(--font-size-3xl); margin-bottom: var(--spacing-sm); }
    .feature-alt-text p { color: var(--text-muted); font-size: var(--font-size-lg); line-height: 1.8; }
    .feature-alt-text ul { margin-top: var(--spacing-md); }
    .feature-alt-text ul li {
        display: flex;
        align-items: flex-start;
        gap: var(--spacing-sm);
        padding: var(--spacing-xs) 0;
        font-size: var(--font-size-base);
        color: var(--text-light);
    }
    .feature-alt-text ul li i { color: var(--secondary); font-size: 1.1rem; margin-top: 4px; flex-shrink: 0; }

    /* ===== Data / Stats ===== */
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: var(--spacing-md);
    }
    .stat-card {
        background: var(--bg-card);
        border-radius: var(--radius);
        padding: var(--spacing-lg);
        text-align: center;
        box-shadow: var(--shadow-card);
        border: 1px solid var(--border-light);
        transition: var(--transition);
    }
    .stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    .stat-card .num {
        font-size: var(--font-size-4xl);
        font-weight: 900;
        background: linear-gradient(135deg, var(--secondary), var(--accent));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        line-height: 1.2;
    }
    .stat-card .label {
        font-size: var(--font-size-sm);
        color: var(--text-muted);
        margin-top: 4px;
    }
    .stat-card .icon {
        font-size: 2rem;
        color: var(--border);
        margin-bottom: var(--spacing-xs);
        display: block;
    }

    /* ===== FAQ ===== */
    .faq-grid {
        max-width: 800px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    .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: var(--border); }
    .faq-question {
        padding: var(--spacing-md);
        font-size: var(--font-size-base);
        font-weight: 600;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: var(--spacing-sm);
        cursor: pointer;
        color: var(--text);
        background: none;
        width: 100%;
        text-align: left;
        transition: var(--transition);
    }
    .faq-question:hover { color: var(--secondary); }
    .faq-question i { transition: var(--transition); color: var(--text-muted); font-size: 0.9rem; }
    .faq-item.open .faq-question i { transform: rotate(180deg); color: var(--secondary); }
    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease, padding 0.3s ease;
        padding: 0 var(--spacing-md);
    }
    .faq-item.open .faq-answer {
        max-height: 300px;
        padding: 0 var(--spacing-md) var(--spacing-md);
    }
    .faq-answer p { color: var(--text-muted); font-size: var(--font-size-sm); margin-bottom: 0; line-height: 1.8; }

    /* ===== CTA ===== */
    .cta-section {
        background: var(--primary-gradient);
        border-radius: var(--radius-lg);
        padding: var(--spacing-xl) var(--spacing-lg);
        text-align: center;
        position: relative;
        overflow: hidden;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
        opacity: 0.08;
        z-index: 1;
    }
    .cta-section > * { position: relative; z-index: 2; }
    .cta-section h2 { font-size: var(--font-size-3xl); color: white; margin-bottom: var(--spacing-sm); }
    .cta-section p { color: var(--text-white-muted); font-size: var(--font-size-lg); max-width: 560px; margin: 0 auto var(--spacing-md); }
    .cta-section .btn { font-size: var(--font-size-base); padding: 14px 40px; }
    .cta-buttons { display: flex; gap: var(--spacing-sm); justify-content: center; flex-wrap: wrap; }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--bg-dark);
        color: var(--text-white-muted);
        padding: var(--spacing-xl) 0 var(--spacing-md);
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: var(--spacing-lg);
        margin-bottom: var(--spacing-lg);
    }
    .footer-brand .logo-text { font-size: 1.5rem; }
    .footer-brand p { font-size: var(--font-size-sm); margin-top: var(--spacing-sm); max-width: 320px; line-height: 1.8; }
    .footer-col h4 { font-size: var(--font-size-base); color: white; margin-bottom: var(--spacing-sm); font-weight: 700; }
    .footer-col a {
        display: block;
        padding: 4px 0;
        font-size: var(--font-size-sm);
        color: var(--text-white-muted);
        transition: var(--transition);
    }
    .footer-col a:hover { color: var(--secondary); padding-left: 4px; }
    .footer-social { display: flex; gap: var(--spacing-xs); margin-top: var(--spacing-sm); }
    .footer-social a {
        width: 40px;
        height: 40px;
        border-radius: 50%;
        background: rgba(255,255,255,0.06);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text-white-muted);
        font-size: 1.1rem;
        transition: var(--transition);
    }
    .footer-social a:hover { background: var(--secondary); color: white; transform: translateY(-3px); }
    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.06);
        padding-top: var(--spacing-md);
        display: flex;
        align-items: center;
        justify-content: space-between;
        flex-wrap: wrap;
        gap: var(--spacing-sm);
        font-size: var(--font-size-sm);
    }
    .footer-bottom a { color: var(--text-white-muted); }
    .footer-bottom a:hover { color: var(--secondary); }

    /* ===== Back to Top ===== */
    .back-top {
        position: fixed;
        bottom: 32px;
        right: 32px;
        width: 48px;
        height: 48px;
        border-radius: 50%;
        background: var(--primary);
        color: white;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        box-shadow: 0 4px 20px rgba(27,27,47,0.3);
        z-index: 999;
        opacity: 0;
        transform: translateY(20px);
        pointer-events: none;
        transition: var(--transition);
    }
    .back-top.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
    .back-top:hover { background: var(--secondary); transform: translateY(-4px); box-shadow: 0 8px 28px rgba(255,107,53,0.4); color: white; }

    /* ===== 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); }
        .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-md); }
        .hero h1 { font-size: var(--font-size-4xl); }
        .feature-alt-grid { grid-template-columns: 1fr; gap: var(--spacing-lg); }
        .feature-alt-image { order: -1; }
    }
    @media (max-width: 768px) {
        :root {
            --font-size-5xl: 2.5rem;
            --font-size-4xl: 2.2rem;
            --font-size-3xl: 1.8rem;
            --font-size-2xl: 1.4rem;
            --spacing-2xl: 56px;
            --spacing-xl: 40px;
            --spacing-lg: 32px;
        }
        .nav-main { display: none; }
        .header-actions .btn-outline { display: none; }
        .mobile-menu-btn { display: flex; }
        .mobile-nav { display: block; }
        .hero { min-height: 70vh; }
        .hero h1 { font-size: var(--font-size-4xl); }
        .hero p { font-size: var(--font-size-base); }
        .hero-search { flex-direction: column; border-radius: var(--radius-sm); }
        .hero-search input { padding: 12px 16px; }
        .hero-search button { border-radius: 0; padding: 12px; justify-content: center; }
        .hero-stats { gap: var(--spacing-md); }
        .hero-stat .num { font-size: var(--font-size-2xl); }
        .posts-grid { grid-template-columns: 1fr; }
        .features-grid { grid-template-columns: 1fr; }
        .category-grid { grid-template-columns: 1fr; }
        .stats-grid { grid-template-columns: repeat(2, 1fr); gap: var(--spacing-sm); }
        .stat-card { padding: var(--spacing-md); }
        .stat-card .num { font-size: var(--font-size-3xl); }
        .footer-grid { grid-template-columns: 1fr; }
        .footer-bottom { flex-direction: column; text-align: center; }
        .section-header h2 { font-size: var(--font-size-2xl); }
        .faq-question { font-size: var(--font-size-sm); padding: var(--spacing-sm); }
        .back-top { bottom: 20px; right: 20px; width: 44px; height: 44px; }
        .cta-section h2 { font-size: var(--font-size-2xl); }
        .hero-cta .btn { width: 100%; justify-content: center; }
    }
    @media (max-width: 520px) {
        :root {
            --font-size-5xl: 2rem;
            --font-size-4xl: 1.8rem;
            --font-size-3xl: 1.5rem;
            --spacing-2xl: 40px;
            --spacing-xl: 32px;
        }
        .hero { min-height: 60vh; }
        .hero h1 { font-size: var(--font-size-3xl); }
        .hero-stat .num { font-size: var(--font-size-xl); }
        .hero-stat .label { font-size: 0.75rem; }
        .stats-grid { grid-template-columns: repeat(2, 1fr); }
        .stat-card .num { font-size: var(--font-size-2xl); }
        .post-card .thumb { height: 160px; }
        .logo-text { font-size: 1.1rem; }
        .logo-icon { width: 30px; height: 30px; font-size: 1rem; }
        .header-inner { padding: 0 var(--spacing-sm); }
        .section { padding: var(--spacing-xl) 0; }
    }

/* roulang page: category1 */
/* ===== DESIGN VARIABLES ===== */
        :root {
            --primary: #1E293B;
            --primary-light: #334155;
            --secondary: #F97316;
            --secondary-hover: #EA580C;
            --accent: #3B82F6;
            --accent-light: #60A5FA;
            --bg: #F8FAFC;
            --bg-alt: #F1F5F9;
            --bg-dark: #0F172A;
            --text: #0F172A;
            --text-light: #475569;
            --text-lighter: #94A3B8;
            --text-white: #F8FAFC;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --spacing-xs: 0.25rem;
            --spacing-sm: 0.5rem;
            --spacing-md: 1rem;
            --spacing-lg: 2rem;
            --spacing-xl: 4rem;
            --spacing-2xl: 6rem;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
        }

        /* ===== RESET & BASE ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--accent); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary); }
        a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
        button { font-family: inherit; cursor: pointer; border: none; background: none; transition: var(--transition); }
        button:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text); }
        p { margin-bottom: var(--spacing-md); }
        p:last-child { margin-bottom: 0; }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }
        @media (max-width: 768px) {
            .container { padding: 0 var(--spacing-md); }
        }

        /* ===== HEADER / NAV ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(15, 23, 42, 0.96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            box-shadow: 0 1px 20px rgba(0,0,0,0.2);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: var(--spacing-lg);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-shrink: 0;
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
            background: var(--secondary);
            box-shadow: 0 4px 12px rgba(249, 115, 22, 0.3);
        }
        .logo-text {
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: var(--spacing-xs);
        }
        .nav-main a {
            padding: 0.5rem 1.2rem;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-lighter);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-main a:hover { color: #fff; background: rgba(255,255,255,0.08); }
        .nav-main a.active {
            color: #fff;
            background: rgba(249, 115, 22, 0.2);
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background: var(--secondary);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: var(--spacing-sm);
            flex-shrink: 0;
        }
        .search-toggle {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-lighter);
            font-size: 1.1rem;
            transition: var(--transition);
            background: rgba(255,255,255,0.05);
        }
        .search-toggle:hover { color: #fff; background: rgba(255,255,255,0.12); }
        .btn-nav {
            padding: 0.5rem 1.2rem;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 600;
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-nav-primary {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(249, 115, 22, 0.3);
        }
        .btn-nav-primary:hover { background: var(--secondary-hover); color: #fff; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4); }
        .btn-nav-outline {
            border: 1.5px solid rgba(255,255,255,0.2);
            color: var(--text-white);
        }
        .btn-nav-outline:hover { border-color: var(--secondary); color: var(--secondary); background: rgba(249,115,22,0.08); }
        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.4rem;
            background: rgba(255,255,255,0.06);
        }
        .mobile-toggle:hover { background: rgba(255,255,255,0.12); }

        @media (max-width: 768px) {
            .nav-main { display: none; }
            .btn-nav-outline { display: none; }
            .mobile-toggle { display: flex; }
            .header-inner { height: 64px; }
            .nav-main.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(15, 23, 42, 0.98);
                backdrop-filter: blur(20px);
                padding: var(--spacing-md) var(--spacing-lg);
                gap: var(--spacing-xs);
                border-bottom: 1px solid rgba(255,255,255,0.06);
                box-shadow: var(--shadow-lg);
            }
            .nav-main.open a { padding: 0.75rem 1rem; width: 100%; }
            .nav-main.open a.active::after { display: none; }
            .nav-main.open a.active { background: rgba(249,115,22,0.15); border-left: 3px solid var(--secondary); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
        }
        @media (min-width: 769px) {
            .mobile-toggle { display: none !important; }
            .nav-main { display: flex !important; }
        }

        /* ===== HERO ===== */
        .hero-category {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: var(--spacing-xl) 0;
            overflow: hidden;
            background: var(--bg-dark);
        }
        .hero-category-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            transform: scale(1.05);
            transition: transform 0.6s ease;
        }
        .hero-category:hover .hero-category-bg { transform: scale(1); }
        .hero-category-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.85) 0%, rgba(30,41,59,0.7) 50%, rgba(15,23,42,0.85) 100%);
        }
        .hero-category .container { position: relative; z-index: 2; }
        .hero-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.35rem 1.2rem;
            border-radius: 50px;
            background: rgba(249,115,22,0.2);
            border: 1px solid rgba(249,115,22,0.3);
            color: var(--secondary);
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: var(--spacing-md);
        }
        .hero-category h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: var(--spacing-md);
            letter-spacing: -0.03em;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .hero-category h1 span { color: var(--secondary); }
        .hero-category p {
            font-size: 1.2rem;
            color: var(--text-lighter);
            max-width: 680px;
            margin: 0 auto var(--spacing-lg);
            line-height: 1.7;
        }
        .hero-search {
            display: flex;
            max-width: 520px;
            margin: 0 auto;
            background: rgba(255,255,255,0.08);
            border-radius: 50px;
            border: 1px solid rgba(255,255,255,0.1);
            overflow: hidden;
            transition: var(--transition);
            backdrop-filter: blur(10px);
        }
        .hero-search:focus-within { border-color: var(--secondary); box-shadow: 0 0 0 3px rgba(249,115,22,0.2); background: rgba(255,255,255,0.12); }
        .hero-search input {
            flex: 1;
            padding: 0.9rem 1.5rem;
            background: transparent;
            border: none;
            outline: none;
            color: #fff;
            font-size: 1rem;
        }
        .hero-search input::placeholder { color: var(--text-lighter); }
        .hero-search button {
            padding: 0.9rem 1.8rem;
            background: var(--secondary);
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .hero-search button:hover { background: var(--secondary-hover); }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: var(--spacing-xl);
            margin-top: var(--spacing-lg);
            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: var(--text-lighter);
            margin-top: 0.2rem;
        }

        @media (max-width: 768px) {
            .hero-category { min-height: 340px; padding: var(--spacing-lg) 0; }
            .hero-category h1 { font-size: 2rem; }
            .hero-category p { font-size: 1rem; }
            .hero-stats { gap: var(--spacing-lg); }
            .hero-stat-num { font-size: 1.5rem; }
        }
        @media (max-width: 520px) {
            .hero-category h1 { font-size: 1.6rem; }
            .hero-search { flex-direction: column; border-radius: var(--radius-md); }
            .hero-search input { padding: 0.8rem 1.2rem; }
            .hero-search button { padding: 0.8rem; justify-content: center; }
            .hero-stats { gap: var(--spacing-md); }
        }

        /* ===== SECTION COMMON ===== */
        .section {
            padding: var(--spacing-2xl) 0;
        }
        .section-alt { background: var(--bg-alt); }
        .section-dark { background: var(--bg-dark); }
        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto var(--spacing-xl);
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.02em;
        }
        .section-header h2 span { color: var(--secondary); }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-light);
            line-height: 1.7;
        }
        .section-header.light h2 { color: #fff; }
        .section-header.light p { color: var(--text-lighter); }
        .section-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.3rem 1rem;
            border-radius: 50px;
            background: rgba(249,115,22,0.1);
            color: var(--secondary);
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: var(--spacing-sm);
        }

        @media (max-width: 768px) {
            .section { padding: var(--spacing-xl) 0; }
            .section-header h2 { font-size: 1.6rem; }
            .section-header p { font-size: 0.95rem; }
        }

        /* ===== CARD GRID ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: var(--spacing-lg);
        }
        .card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
        .card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }
        @media (max-width: 992px) {
            .card-grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .card-grid { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: var(--spacing-md); }
            .card-grid.cols-2 { grid-template-columns: 1fr; }
            .card-grid.cols-4 { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .card-grid.cols-4 { grid-template-columns: 1fr; }
        }

        /* ===== CATEGORY CARDS ===== */
        .cat-card {
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
        }
        .cat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
        .cat-card-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .cat-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .cat-card:hover .cat-card-img img { transform: scale(1.08); }
        .cat-card-img .tag {
            position: absolute;
            top: var(--spacing-sm);
            left: var(--spacing-sm);
            padding: 0.25rem 0.8rem;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 2px 10px rgba(0,0,0,0.2);
        }
        .cat-card-body {
            padding: var(--spacing-md) var(--spacing-md) var(--spacing-lg);
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .cat-card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
            color: var(--text);
        }
        .cat-card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
            flex: 1;
            margin-bottom: var(--spacing-sm);
        }
        .cat-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-lighter);
            margin-top: auto;
            padding-top: var(--spacing-sm);
            border-top: 1px solid var(--border-light);
        }
        .cat-card-meta span { display: flex; align-items: center; gap: 0.3rem; }

        /* ===== GUIDE LIST ===== */
        .guide-list { display: flex; flex-direction: column; gap: var(--spacing-md); }
        .guide-item {
            display: flex;
            align-items: center;
            gap: var(--spacing-lg);
            padding: var(--spacing-md) var(--spacing-lg);
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .guide-item:hover { transform: translateX(4px); box-shadow: var(--shadow-md); border-color: var(--secondary); }
        .guide-item-num {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 800;
            color: #fff;
            background: var(--primary);
            flex-shrink: 0;
        }
        .guide-item:nth-child(1) .guide-item-num { background: var(--secondary); }
        .guide-item:nth-child(2) .guide-item-num { background: var(--accent); }
        .guide-item:nth-child(3) .guide-item-num { background: #8B5CF6; }
        .guide-item-content { flex: 1; min-width: 0; }
        .guide-item-content h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 0.2rem;
        }
        .guide-item-content p {
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 0;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .guide-item-tag {
            padding: 0.3rem 0.8rem;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: var(--bg-alt);
            color: var(--text-light);
            flex-shrink: 0;
        }
        .guide-item .btn-sm {
            padding: 0.4rem 1rem;
            border-radius: var(--radius-sm);
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--bg-alt);
            color: var(--text);
            flex-shrink: 0;
        }
        .guide-item .btn-sm:hover { background: var(--secondary); color: #fff; }

        @media (max-width: 768px) {
            .guide-item { padding: var(--spacing-md); gap: var(--spacing-md); flex-wrap: wrap; }
            .guide-item-tag { display: none; }
            .guide-item .btn-sm { margin-left: auto; }
        }
        @media (max-width: 520px) {
            .guide-item-content p { white-space: normal; }
        }

        /* ===== FEATURES GRID ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }
        .feature-card {
            background: #fff;
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
            margin: 0 auto var(--spacing-md);
            background: var(--primary);
        }
        .feature-card:nth-child(1) .feature-icon { background: var(--secondary); }
        .feature-card:nth-child(2) .feature-icon { background: var(--accent); }
        .feature-card:nth-child(3) .feature-icon { background: #8B5CF6; }
        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 0;
        }

        @media (max-width: 768px) {
            .features-grid { grid-template-columns: 1fr; gap: var(--spacing-md); }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-sm); }
        .faq-question {
            width: 100%;
            padding: var(--spacing-md) var(--spacing-lg);
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            gap: var(--spacing-md);
        }
        .faq-question:hover { color: var(--secondary); }
        .faq-question i { transition: transform 0.3s ease; color: var(--text-lighter); font-size: 0.9rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); color: var(--secondary); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 var(--spacing-lg);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 var(--spacing-lg) var(--spacing-md);
        }
        .faq-answer p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            text-align: center;
            padding: var(--spacing-2xl) 0;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.1;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: var(--spacing-md);
        }
        .cta-section h2 span { color: var(--secondary); }
        .cta-section p {
            font-size: 1.1rem;
            color: var(--text-lighter);
            max-width: 600px;
            margin: 0 auto var(--spacing-lg);
        }
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: var(--spacing-md);
            flex-wrap: wrap;
        }
        .btn-cta {
            padding: 0.9rem 2.4rem;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 700;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
        }
        .btn-cta-primary {
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 8px 30px rgba(249,115,22,0.3);
        }
        .btn-cta-primary:hover { background: var(--secondary-hover); color: #fff; transform: translateY(-2px); box-shadow: 0 12px 40px rgba(249,115,22,0.4); }
        .btn-cta-outline {
            border: 2px solid rgba(255,255,255,0.2);
            color: #fff;
        }
        .btn-cta-outline:hover { border-color: var(--secondary); color: var(--secondary); background: rgba(249,115,22,0.08); }

        @media (max-width: 768px) {
            .cta-section h2 { font-size: 1.6rem; }
            .cta-section p { font-size: 0.95rem; }
            .btn-cta { padding: 0.8rem 1.6rem; font-size: 0.9rem; }
        }

        /* ===== FOOTER ===== */
        .site-footer {
            background: var(--primary);
            color: var(--text-lighter);
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            border-top: 1px solid rgba(255,255,255,0.05);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            margin-bottom: var(--spacing-xl);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: var(--text-lighter);
            margin-bottom: var(--spacing-md);
        }
        .footer-social {
            display: flex;
            gap: var(--spacing-sm);
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-lighter);
            background: rgba(255,255,255,0.06);
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .footer-social a:hover { background: var(--secondary); color: #fff; transform: translateY(-2px); }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--spacing-md);
        }
        .footer-col a {
            display: block;
            font-size: 0.9rem;
            color: var(--text-lighter);
            padding: 0.3rem 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--secondary); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: var(--spacing-lg);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: var(--spacing-md);
            font-size: 0.85rem;
            color: var(--text-lighter);
        }
        .footer-bottom a { color: var(--text-lighter); }
        .footer-bottom a:hover { color: var(--secondary); }

        @media (max-width: 992px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); }
        }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr; gap: var(--spacing-lg); }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== BREADCRUMB ===== */
        .breadcrumb {
            padding: var(--spacing-md) 0;
            font-size: 0.85rem;
            color: var(--text-lighter);
            background: var(--bg-alt);
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb a { color: var(--text-light); }
        .breadcrumb a:hover { color: var(--secondary); }
        .breadcrumb span { color: var(--text-lighter); }
        .breadcrumb .sep { margin: 0 0.5rem; color: var(--text-lighter); }

        /* ===== BACK TO TOP ===== */
        .back-to-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--secondary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 20px rgba(249,115,22,0.3);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: var(--transition);
            z-index: 50;
        }
        .back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
        .back-to-top:hover { background: var(--secondary-hover); transform: translateY(-4px); box-shadow: 0 8px 30px rgba(249,115,22,0.4); }

        /* ===== RESPONSIVE HELPERS ===== */
        @media (max-width: 520px) {
            .hero-category h1 { font-size: 1.4rem; }
            .section-header h2 { font-size: 1.3rem; }
            .cat-card-img { height: 140px; }
        }

        /* ===== ANIMATIONS ===== */
        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .animate-fade-up { animation: fadeInUp 0.6s ease forwards; }
        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }
        .delay-4 { animation-delay: 0.4s; }

/* roulang page: article */
/* ===== Design Variables ===== */
:root {
  --primary: #0f172a;
  --primary-light: #1e293b;
  --secondary: #f59e0b;
  --secondary-hover: #d97706;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --bg: #f8fafc;
  --bg-alt: #f1f5f9;
  --bg-card: #ffffff;
  --text: #1e293b;
  --text-light: #64748b;
  --text-lighter: #94a3b8;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --success: #10b981;
  --error: #ef4444;
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  --spacing-4xl: 80px;
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --transition: 0.2s ease;
  --max-width: 1200px;
  --content-width: 780px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover, a:focus { color: var(--accent-hover); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: var(--radius-sm); }
button { cursor: pointer; font-family: inherit; border: none; background: none; transition: all var(--transition); }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
input, textarea { font-family: inherit; font-size: 1rem; }
ul, ol { list-style: none; }

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}
@media (max-width: 768px) {
  .container { padding: 0 var(--spacing-md); }
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: var(--spacing-lg);
}
.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}
.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  background: var(--secondary);
  color: #fff;
  font-size: 1.3rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}
.logo-text {
  font-size: 1.35rem;
  font-weight: 800;
  background: linear-gradient(135deg, #fff 30%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}
.nav-main {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}
.nav-main a {
  padding: 8px 18px;
  border-radius: var(--radius);
  color: rgba(255,255,255,0.7);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition);
  position: relative;
  white-space: nowrap;
}
.nav-main a:hover,
.nav-main a:focus {
  color: #fff;
  background: rgba(255,255,255,0.08);
}
.nav-main a.active {
  color: #fff;
  background: rgba(245, 158, 11, 0.15);
}
.nav-main a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  border-radius: 2px;
  background: var(--secondary);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-shrink: 0;
}
.search-toggle {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.7);
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}
.search-toggle:hover {
  background: rgba(255,255,255,0.12);
  color: #fff;
}
.btn-header {
  padding: 8px 22px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9rem;
  background: var(--secondary);
  color: #0f172a;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-header:hover {
  background: var(--secondary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35);
}
.mobile-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: var(--radius);
  background: rgba(255,255,255,0.06);
  color: #fff;
  font-size: 1.3rem;
  align-items: center;
  justify-content: center;
}
@media (max-width: 768px) {
  .header-inner { height: 62px; }
  .nav-main { display: none; }
  .nav-main.open { display: flex; flex-direction: column; position: absolute; top: 62px; left: 0; right: 0; background: rgba(15,23,42,0.99); backdrop-filter: blur(16px); padding: var(--spacing-md); gap: var(--spacing-xs); border-bottom: 1px solid rgba(255,255,255,0.06); box-shadow: var(--shadow-lg); }
  .nav-main.open a { padding: 12px 16px; width: 100%; }
  .mobile-toggle { display: flex; }
  .btn-header { padding: 8px 16px; font-size: 0.85rem; }
  .search-toggle { width: 38px; height: 38px; }
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  padding: var(--spacing-lg) 0 var(--spacing-md);
  font-size: 0.85rem;
  color: var(--text-lighter);
}
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--secondary); }
.breadcrumb span { color: var(--text-lighter); margin: 0 6px; }
.breadcrumb .current { color: var(--text); font-weight: 500; }

/* ===== Article Header ===== */
.article-header {
  padding: var(--spacing-lg) 0 var(--spacing-xl);
  max-width: var(--content-width);
  margin: 0 auto;
}
.article-category {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(245, 158, 11, 0.12);
  color: var(--secondary);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: var(--spacing-md);
}
.article-title {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--primary);
  margin-bottom: var(--spacing-lg);
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-md);
  color: var(--text-light);
  font-size: 0.9rem;
}
.article-meta .meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.article-meta .meta-item i { font-size: 0.85rem; color: var(--text-lighter); }
.article-cover {
  margin-top: var(--spacing-xl);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--bg-alt);
  aspect-ratio: 16/9;
  position: relative;
}
.article-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.article-cover:hover img { transform: scale(1.03); }

@media (max-width: 768px) {
  .article-title { font-size: 1.6rem; }
  .article-meta { gap: var(--spacing-sm); font-size: 0.8rem; flex-wrap: wrap; }
  .article-cover { margin-top: var(--spacing-lg); border-radius: var(--radius); }
}

/* ===== Article Content ===== */
.article-content-wrap {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--spacing-xl) 0 var(--spacing-2xl);
}
.article-content {
  font-size: 1.05rem;
  line-height: 1.85;
  color: var(--text);
}
.article-content h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--border);
  color: var(--primary);
}
.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-sm);
  color: var(--primary-light);
}
.article-content p {
  margin-bottom: var(--spacing-lg);
}
.article-content p:last-child { margin-bottom: 0; }
.article-content img {
  border-radius: var(--radius);
  margin: var(--spacing-lg) auto;
  box-shadow: var(--shadow);
  max-width: 100%;
}
.article-content blockquote {
  border-left: 4px solid var(--secondary);
  background: var(--bg-alt);
  padding: var(--spacing-lg) var(--spacing-xl);
  margin: var(--spacing-xl) 0;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  color: var(--text-light);
}
.article-content blockquote p { margin-bottom: 0; }
.article-content ul,
.article-content ol {
  margin: var(--spacing-md) 0 var(--spacing-lg) var(--spacing-xl);
}
.article-content ul li {
  list-style: disc;
  margin-bottom: var(--spacing-sm);
}
.article-content ol li {
  list-style: decimal;
  margin-bottom: var(--spacing-sm);
}
.article-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content a:hover { color: var(--accent-hover); }
.article-content code {
  background: var(--bg-alt);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
  border: 1px solid var(--border);
}
.article-content pre {
  background: var(--primary);
  color: #e2e8f0;
  padding: var(--spacing-lg);
  border-radius: var(--radius);
  overflow-x: auto;
  margin: var(--spacing-xl) 0;
  font-size: 0.9rem;
  line-height: 1.6;
}
.article-content pre code {
  background: none;
  padding: 0;
  border: none;
  color: inherit;
  font-size: inherit;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-xl) 0;
  font-size: 0.95rem;
}
.article-content th,
.article-content td {
  padding: var(--spacing-sm) var(--spacing-md);
  border: 1px solid var(--border);
  text-align: left;
}
.article-content th {
  background: var(--bg-alt);
  font-weight: 600;
  color: var(--primary);
}

@media (max-width: 768px) {
  .article-content { font-size: 1rem; line-height: 1.7; }
  .article-content h2 { font-size: 1.3rem; }
  .article-content h3 { font-size: 1.1rem; }
  .article-content blockquote { padding: var(--spacing-md) var(--spacing-lg); }
}

/* ===== Article Footer ===== */
.article-footer {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--spacing-lg) 0 var(--spacing-2xl);
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
}
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}
.article-tags .tag {
  padding: 4px 14px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--text-light);
  transition: all var(--transition);
}
.article-tags .tag:hover {
  background: var(--secondary);
  color: #fff;
  border-color: var(--secondary);
}
.article-share {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-light);
  font-size: 0.9rem;
}
.article-share a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-light);
  transition: all var(--transition);
  font-size: 1rem;
}
.article-share a:hover {
  background: var(--secondary);
  color: #fff;
  border-color: var(--secondary);
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .article-footer { flex-direction: column; align-items: flex-start; }
}

/* ===== Article Nav (prev/next) ===== */
.article-nav {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--spacing-xl) 0;
  display: flex;
  gap: var(--spacing-lg);
}
.article-nav a {
  flex: 1;
  padding: var(--spacing-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}
.article-nav a:hover {
  border-color: var(--secondary);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.article-nav .nav-label {
  font-size: 0.75rem;
  color: var(--text-lighter);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}
.article-nav .nav-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
}
.article-nav a:hover .nav-title { color: var(--secondary); }
.article-nav .nav-empty {
  flex: 1;
  padding: var(--spacing-lg);
  background: var(--bg-alt);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--text-lighter);
  font-size: 0.9rem;
  text-align: center;
}

@media (max-width: 768px) {
  .article-nav { flex-direction: column; gap: var(--spacing-md); }
}

/* ===== Related Posts ===== */
.related-section {
  padding: var(--spacing-3xl) 0;
  background: var(--bg-alt);
}
.related-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}
.related-header h2 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}
.related-header p {
  color: var(--text-light);
  font-size: 1rem;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}
.related-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.related-card .card-img {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-alt);
  position: relative;
}
.related-card .card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.related-card:hover .card-img img { transform: scale(1.05); }
.related-card .card-body {
  padding: var(--spacing-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}
.related-card .card-cat {
  font-size: 0.75rem;
  color: var(--secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--spacing-xs);
}
.related-card .card-title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
  transition: color var(--transition);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card:hover .card-title { color: var(--secondary); }
.related-card .card-excerpt {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--spacing-md);
}
.related-card .card-meta2 {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--text-lighter);
  border-top: 1px solid var(--border-light);
  padding-top: var(--spacing-sm);
}

@media (max-width: 1024px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .related-grid { grid-template-columns: 1fr; }
  .related-header h2 { font-size: 1.4rem; }
}

/* ===== CTA Section ===== */
.cta-section {
  padding: var(--spacing-3xl) 0;
  background: var(--primary);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity: 0.08;
  pointer-events: none;
}
.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: var(--spacing-md);
}
.cta-inner p {
  color: rgba(255,255,255,0.7);
  font-size: 1.05rem;
  margin-bottom: var(--spacing-xl);
  line-height: 1.7;
}
.cta-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}
.cta-btn-primary {
  padding: 14px 36px;
  border-radius: var(--radius);
  background: var(--secondary);
  color: #0f172a;
  font-weight: 700;
  font-size: 1rem;
  transition: all var(--transition);
  box-shadow: 0 8px 30px rgba(245, 158, 11, 0.3);
}
.cta-btn-primary:hover {
  background: var(--secondary-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(245, 158, 11, 0.45);
  color: #0f172a;
}
.cta-btn-secondary {
  padding: 14px 36px;
  border-radius: var(--radius);
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-weight: 600;
  font-size: 1rem;
  border: 1px solid rgba(255,255,255,0.2);
  transition: all var(--transition);
}
.cta-btn-secondary:hover {
  background: rgba(255,255,255,0.18);
  color: #fff;
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .cta-inner h2 { font-size: 1.5rem; }
  .cta-buttons { flex-direction: column; align-items: center; }
  .cta-btn-primary, .cta-btn-secondary { width: 100%; max-width: 300px; text-align: center; }
}

/* ===== FAQ Section ===== */
.faq-section {
  padding: var(--spacing-3xl) 0;
  background: var(--bg);
}
.faq-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}
.faq-header h2 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}
.faq-header p {
  color: var(--text-light);
  font-size: 1rem;
}
.faq-list {
  max-width: 740px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item:hover { border-color: var(--secondary); }
.faq-question {
  padding: var(--spacing-lg) var(--spacing-xl);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  background: none;
  width: 100%;
  text-align: left;
  border: none;
  transition: color var(--transition);
}
.faq-question:hover { color: var(--secondary); }
.faq-question i {
  font-size: 1.1rem;
  color: var(--text-lighter);
  transition: transform var(--transition);
  flex-shrink: 0;
}
.faq-item.open .faq-question i { transform: rotate(180deg); color: var(--secondary); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 var(--spacing-xl);
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 var(--spacing-xl) var(--spacing-lg);
}
.faq-answer p {
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.7;
}

@media (max-width: 768px) {
  .faq-header h2 { font-size: 1.4rem; }
  .faq-question { font-size: 0.95rem; padding: var(--spacing-md) var(--spacing-lg); }
  .faq-answer { padding: 0 var(--spacing-lg); }
  .faq-item.open .faq-answer { padding: 0 var(--spacing-lg) var(--spacing-md); }
}

/* ===== Site Footer ===== */
.site-footer {
  background: var(--primary);
  color: rgba(255,255,255,0.8);
  padding: var(--spacing-3xl) 0 0;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--spacing-2xl);
  padding-bottom: var(--spacing-2xl);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand p {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  line-height: 1.7;
  margin-top: var(--spacing-sm);
  max-width: 320px;
}
.footer-social {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}
.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all var(--transition);
}
.footer-social a:hover {
  background: var(--secondary);
  color: #0f172a;
  transform: translateY(-2px);
}
.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  letter-spacing: 0.02em;
}
.footer-col a {
  display: block;
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  padding: 4px 0;
  transition: all var(--transition);
}
.footer-col a:hover {
  color: var(--secondary);
  transform: translateX(4px);
}
.footer-bottom {
  padding: var(--spacing-lg) 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
}
.footer-bottom a {
  color: rgba(255,255,255,0.4);
  transition: color var(--transition);
}
.footer-bottom a:hover { color: var(--secondary); }

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-xl); }
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; gap: var(--spacing-lg); }
  .footer-brand p { max-width: 100%; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ===== Not Found State ===== */
.not-found-wrap {
  text-align: center;
  padding: var(--spacing-4xl) 0;
  max-width: 600px;
  margin: 0 auto;
}
.not-found-wrap .nf-icon {
  font-size: 4rem;
  color: var(--text-lighter);
  margin-bottom: var(--spacing-lg);
}
.not-found-wrap h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: var(--spacing-md);
}
.not-found-wrap p {
  color: var(--text-light);
  font-size: 1.05rem;
  margin-bottom: var(--spacing-xl);
}
.not-found-wrap .btn-home {
  display: inline-block;
  padding: 12px 32px;
  background: var(--secondary);
  color: #0f172a;
  font-weight: 700;
  border-radius: var(--radius);
  transition: all var(--transition);
}
.not-found-wrap .btn-home:hover {
  background: var(--secondary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(245,158,11,0.3);
  color: #0f172a;
}

/* ===== Utility ===== */
.text-center { text-align: center; }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }