/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a1a2e;
            --primary-light: #16213e;
            --primary-dark: #0f0f1a;
            --accent: #e94560;
            --accent-light: #ff6b7f;
            --accent-dark: #c2314a;
            --secondary: #0f3460;
            --star-gold: #f9d71c;
            --star-blue: #4facfe;
            --nebula-purple: #a18cd1;
            --cosmic-teal: #00f2fe;
            --bg-dark: #0a0a1a;
            --bg-card: rgba(255, 255, 255, 0.04);
            --bg-card-hover: rgba(255, 255, 255, 0.08);
            --text-primary: #f0f0f5;
            --text-secondary: #b0b0c8;
            --text-muted: #7a7a9a;
            --border-color: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.12);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.3);
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --header-h: 72px;
            --gap: 24px;
            --gap-lg: 48px;
        }

        /* ===== 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-primary);
            background: var(--bg-dark);
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--star-blue);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--cosmic-teal);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 4px;
            border-radius: 4px;
        }

        button,
        input,
        textarea,
        select {
            font: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Container ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 20px;
        }

        .container-wide {
            max-width: 1360px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== Section Spacing ===== */
        .section {
            padding: 80px 0;
        }
        .section-sm {
            padding: 48px 0;
        }
        .section-lg {
            padding: 120px 0;
        }

        .section-title {
            font-size: 2.4rem;
            margin-bottom: 12px;
            text-align: center;
            letter-spacing: -0.02em;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
        }
        .section-title-left {
            text-align: left;
        }
        .section-subtitle-left {
            text-align: left;
            margin-left: 0;
        }

        .divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), var(--star-blue));
            border-radius: 4px;
            margin: 16px auto 32px;
        }
        .divider-left {
            margin-left: 0;
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 10, 26, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            height: var(--header-h);
            transition: background var(--transition);
        }
        .header.scrolled {
            background: rgba(10, 10, 26, 0.95);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 20px;
            gap: 16px;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.03em;
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo i {
            color: var(--star-gold);
            font-size: 1.6rem;
        }
        .logo span {
            background: linear-gradient(135deg, var(--star-gold), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            color: var(--text-primary);
        }

        .nav-search {
            flex: 1;
            max-width: 480px;
            position: relative;
            margin: 0 16px;
        }
        .nav-search .search-form {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            padding: 0 8px 0 18px;
            transition: border-color var(--transition), background var(--transition);
        }
        .nav-search .search-form:focus-within {
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.10);
            box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.15);
        }
        .nav-search .search-form input {
            flex: 1;
            background: none;
            border: none;
            padding: 10px 0;
            font-size: 0.95rem;
            color: var(--text-primary);
            outline: none;
            min-width: 0;
        }
        .nav-search .search-form input::placeholder {
            color: var(--text-muted);
        }
        .nav-search .search-form button {
            background: var(--accent);
            color: #fff;
            border: none;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.95rem;
            transition: background var(--transition), transform var(--transition);
            flex-shrink: 0;
        }
        .nav-search .search-form button:hover {
            background: var(--accent-light);
            transform: scale(1.05);
        }
        .nav-search .search-form button:active {
            transform: scale(0.95);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-links a.active {
            color: #fff;
            background: var(--accent);
        }
        .nav-links a.active:hover {
            background: var(--accent-light);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            flex-shrink: 0;
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Mobile Nav ===== */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: rgba(10, 10, 26, 0.98);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            padding: 16px 20px 24px;
            z-index: 999;
            transform: translateY(-110%);
            transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .mobile-nav.open {
            transform: translateY(0);
        }
        .mobile-nav a {
            display: block;
            padding: 12px 16px;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }
        .mobile-nav a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }
        .mobile-nav a.active {
            color: #fff;
            background: var(--accent);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 20px 80px;
            overflow: hidden;
            background: var(--bg-dark);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.55;
            z-index: 0;
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(10, 10, 26, 0.3) 0%, rgba(10, 10, 26, 0.85) 80%);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 10, 26, 0.2) 0%, var(--bg-dark) 100%);
            z-index: 1;
        }
        .hero-stars {
            position: absolute;
            inset: 0;
            z-index: 1;
            overflow: hidden;
        }
        .hero-stars span {
            position: absolute;
            width: 3px;
            height: 3px;
            background: #fff;
            border-radius: 50%;
            animation: twinkle 3s infinite alternate;
        }
        @keyframes twinkle {
            0% {
                opacity: 0.2;
                transform: scale(0.8);
            }
            100% {
                opacity: 1;
                transform: scale(1.2);
            }
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 820px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(233, 69, 96, 0.15);
            border: 1px solid rgba(233, 69, 96, 0.25);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--accent-light);
            margin-bottom: 24px;
            letter-spacing: 0.03em;
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .hero h1 {
            font-size: 4rem;
            font-weight: 900;
            letter-spacing: -0.03em;
            line-height: 1.1;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #fff 30%, var(--star-gold) 70%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.25rem;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 600;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 20px rgba(233, 69, 96, 0.35);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(233, 69, 96, 0.45);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.08);
            color: var(--text-primary);
            border: 1px solid var(--border-light);
            backdrop-filter: blur(8px);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.14);
            transform: translateY(-2px);
            color: var(--text-primary);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }
        .btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
        }
        .btn-lg {
            padding: 18px 44px;
            font-size: 1.1rem;
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
            margin-top: 56px;
            padding-top: 40px;
            border-top: 1px solid var(--border-color);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--star-gold);
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== Features / 核心说明 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 36px 28px;
            text-align: center;
            transition: all var(--transition);
        }
        .feature-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: var(--border-light);
        }
        .feature-card .icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.6rem;
        }
        .feature-card .icon.gold {
            background: rgba(249, 215, 28, 0.12);
            color: var(--star-gold);
        }
        .feature-card .icon.blue {
            background: rgba(79, 172, 254, 0.12);
            color: var(--star-blue);
        }
        .feature-card .icon.purple {
            background: rgba(161, 140, 209, 0.12);
            color: var(--nebula-purple);
        }
        .feature-card h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
        }
        .feature-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
        }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            cursor: pointer;
            display: block;
            text-decoration: none;
            color: inherit;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow);
            border-color: var(--border-light);
        }
        .category-card .thumb {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }
        .category-card .info {
            padding: 20px 18px 22px;
        }
        .category-card .info h3 {
            font-size: 1.1rem;
            margin-bottom: 6px;
            transition: color var(--transition);
        }
        .category-card:hover .info h3 {
            color: var(--accent-light);
        }
        .category-card .info p {
            color: var(--text-muted);
            font-size: 0.85rem;
            line-height: 1.5;
        }
        .category-card .tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(233, 69, 96, 0.12);
            color: var(--accent-light);
            margin-top: 10px;
        }

        /* ===== 最新资讯 / CMS 列表 ===== */
        .post-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
        }
        .post-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: var(--border-light);
        }
        .post-card .thumb {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            background: var(--primary-dark);
        }
        .post-card .body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .post-card .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .post-card .meta .cat {
            padding: 2px 12px;
            border-radius: 50px;
            background: rgba(79, 172, 254, 0.12);
            color: var(--star-blue);
            font-weight: 600;
        }
        .post-card .meta .date {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .post-card .body h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            line-height: 1.4;
            flex: 1;
        }
        .post-card .body p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card .read-more {
            color: var(--accent-light);
            font-size: 0.9rem;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }
        .post-card .read-more:hover {
            gap: 12px;
            color: var(--accent);
        }

        .empty-posts {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            font-size: 1.05rem;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border-color);
        }
        .empty-posts i {
            font-size: 2.4rem;
            display: block;
            margin-bottom: 16px;
            opacity: 0.5;
        }

        /* ===== 数据 / 流程 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
        }
        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 32px 20px;
            text-align: center;
            transition: all var(--transition);
        }
        .stat-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            border-color: var(--border-light);
        }
        .stat-card .num {
            font-size: 2.8rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--star-gold), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-card .label {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-top: 6px;
        }
        .stat-card .sub {
            color: var(--text-muted);
            font-size: 0.8rem;
            margin-top: 4px;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 32px 28px;
            position: relative;
            transition: all var(--transition);
        }
        .step-card:hover {
            background: var(--bg-card-hover);
            transform: translateY(-4px);
            border-color: var(--border-light);
        }
        .step-card::before {
            counter-increment: step;
            content: '0' counter(step);
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 3rem;
            font-weight: 900;
            color: rgba(233, 69, 96, 0.08);
            line-height: 1;
        }
        .step-card .icon {
            font-size: 2rem;
            color: var(--star-blue);
            margin-bottom: 16px;
        }
        .step-card h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }
        .step-card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-item.active {
            border-color: var(--accent);
            box-shadow: 0 0 0 1px rgba(233, 69, 96, 0.15);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            gap: 16px;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.02);
        }
        .faq-question .icon {
            font-size: 1.2rem;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question .icon {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            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: 0.10;
            z-index: 0;
        }
        .cta-section>* {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: var(--text-secondary);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 1.3rem;
            margin-bottom: 12px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .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-muted);
            font-size: 1.1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-3px);
        }

        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .footer-col a {
            display: block;
            padding: 4px 0;
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent-light);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            z-index: 900;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 20px rgba(233, 69, 96, 0.3);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--accent-light);
            transform: translateY(-4px);
            box-shadow: 0 8px 30px rgba(233, 69, 96, 0.4);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .post-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero h1 {
                font-size: 3rem;
            }
            .section-title {
                font-size: 2rem;
            }
            .cta-section {
                padding: 48px 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }
            .nav-links {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .mobile-nav {
                display: block;
            }
            .nav-search {
                max-width: 200px;
            }
            .nav-search .search-form input {
                font-size: 0.85rem;
                padding: 8px 0;
            }
            .nav-search .search-form button {
                width: 34px;
                height: 34px;
                font-size: 0.85rem;
            }

            .hero {
                min-height: 80vh;
                padding: 100px 16px 60px;
            }
            .hero h1 {
                font-size: 2.4rem;
            }
            .hero p {
                font-size: 1.05rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat .num {
                font-size: 1.8rem;
            }

            .section {
                padding: 56px 0;
            }
            .section-lg {
                padding: 80px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 32px;
            }

            .features-grid {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr 1fr;
            }
            .post-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .cta-section {
                padding: 40px 24px;
                border-radius: var(--radius);
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }

            .faq-question {
                padding: 14px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px;
                font-size: 0.9rem;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.9rem;
            }
            .hero p {
                font-size: 0.95rem;
            }
            .hero-actions .btn {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .nav-search {
                max-width: 140px;
            }
            .nav-search .search-form input {
                font-size: 0.8rem;
                padding: 6px 0;
            }
            .nav-search .search-form button {
                width: 30px;
                height: 30px;
                font-size: 0.75rem;
            }
            .logo {
                font-size: 1.15rem;
            }
            .logo i {
                font-size: 1.2rem;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mt-48 {
            margin-top: 48px;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a1a3e;
            --primary-light: #2d2b55;
            --primary-dark: #0f0f2a;
            --accent: #f5c842;
            --accent-light: #ffd966;
            --accent-dark: #d4a832;
            --bg-dark: #0b0b1a;
            --bg-card: #151530;
            --bg-section: #101025;
            --text-light: #f0f0f8;
            --text-muted: #a8a8c8;
            --text-body: #e0e0ee;
            --border-color: rgba(245, 200, 66, 0.15);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 12px rgba(0,0,0,0.3);
            --shadow-md: 0 8px 32px rgba(0,0,0,0.4);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-main);
            background: var(--bg-dark);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
        a:hover, a:focus { color: var(--accent-light); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-light); font-weight: 700; line-height: 1.3; }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Navigation ===== */
        .header {
            background: rgba(11, 11, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 0 24px;
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-light);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .logo i {
            color: var(--accent);
            font-size: 1.6rem;
        }
        .logo span {
            color: var(--accent);
        }
        .logo:hover { color: var(--text-light); opacity: 0.9; }

        .nav-search {
            flex: 1;
            max-width: 480px;
            margin: 0 16px;
        }
        .search-form {
            display: flex;
            align-items: center;
            background: rgba(255,255,255,0.06);
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: 50px;
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .search-form:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(245, 200, 66, 0.15);
        }
        .search-form input {
            flex: 1;
            background: transparent;
            border: none;
            padding: 10px 18px;
            color: var(--text-light);
            font-size: 0.9rem;
            outline: none;
            min-width: 0;
        }
        .search-form input::placeholder { color: var(--text-muted); }
        .search-form button {
            background: transparent;
            border: none;
            padding: 10px 18px;
            color: var(--text-muted);
            cursor: pointer;
            transition: color var(--transition);
            font-size: 1rem;
        }
        .search-form button:hover { color: var(--accent); }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }
        .nav-links a {
            padding: 8px 18px;
            color: var(--text-muted);
            font-size: 0.9rem;
            font-weight: 500;
            border-radius: 50px;
            transition: background var(--transition), color var(--transition);
            white-space: nowrap;
        }
        .nav-links a:hover { background: rgba(245, 200, 66, 0.1); color: var(--accent-light); }
        .nav-links a.active, .nav-links a[aria-current="page"] {
            background: rgba(245, 200, 66, 0.15);
            color: var(--accent);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: background var(--transition);
        }
        .nav-toggle:hover { background: rgba(255,255,255,0.05); }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-light);
            border-radius: 4px;
            transition: transform var(--transition), opacity var(--transition);
        }

        /* ===== Mobile Nav ===== */
        @media (max-width: 820px) {
            .nav-search { max-width: 280px; }
            .nav-links a { padding: 8px 12px; font-size: 0.82rem; }
        }
        @media (max-width: 720px) {
            .header-inner { height: 60px; }
            .nav-search { display: none; }
            .nav-links {
                position: fixed;
                top: 60px;
                left: 0;
                right: 0;
                background: rgba(11, 11, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: transform 0.4s ease, opacity 0.4s ease;
                z-index: 999;
                box-shadow: var(--shadow-lg);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                width: 100%;
                padding: 12px 20px;
                font-size: 1rem;
                border-radius: 10px;
            }
            .nav-toggle { display: flex; }
        }
        @media (max-width: 480px) {
            .header { padding: 0 16px; }
            .container { padding: 0 16px; }
            .logo { font-size: 1.15rem; }
            .logo i { font-size: 1.3rem; }
        }

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: var(--bg-section);
            border-bottom: 1px solid var(--border-color);
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.12;
            filter: blur(2px);
        }
        .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-muted); }
        .article-breadcrumb a:hover { color: var(--accent); }
        .article-breadcrumb .sep { color: var(--text-muted); opacity: 0.5; }
        .article-breadcrumb .current { color: var(--accent); }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 28px;
            margin-bottom: 16px;
            font-size: 0.88rem;
            color: var(--text-muted);
        }
        .article-meta span { display: flex; align-items: center; gap: 6px; }
        .article-meta i { color: var(--accent); font-size: 0.9rem; }
        .article-meta .category {
            display: inline-block;
            padding: 2px 14px;
            background: rgba(245, 200, 66, 0.15);
            color: var(--accent);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        .article-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-light);
            max-width: 900px;
            letter-spacing: -0.5px;
        }

        @media (max-width: 820px) {
            .article-banner { padding: 50px 0 40px; }
            .article-banner h1 { font-size: 2rem; }
        }
        @media (max-width: 520px) {
            .article-banner h1 { font-size: 1.5rem; }
            .article-meta { gap: 10px 16px; font-size: 0.8rem; }
        }

        /* ===== Article Content ===== */
        .article-main {
            padding: 50px 0 70px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 50px;
            align-items: start;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 40px;
        }
        .article-body .featured-image {
            width: 100%;
            border-radius: var(--radius-md);
            margin-bottom: 32px;
            object-fit: cover;
            max-height: 480px;
            box-shadow: var(--shadow-md);
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-body);
        }
        .article-body .content p {
            margin-bottom: 1.4em;
        }
        .article-body .content h2 {
            font-size: 1.6rem;
            margin-top: 2em;
            margin-bottom: 0.8em;
            color: var(--text-light);
        }
        .article-body .content h3 {
            font-size: 1.25rem;
            margin-top: 1.6em;
            margin-bottom: 0.6em;
            color: var(--text-light);
        }
        .article-body .content ul, 
        .article-body .content ol {
            margin-bottom: 1.4em;
            padding-left: 1.6em;
        }
        .article-body .content li {
            margin-bottom: 0.4em;
            list-style: disc;
        }
        .article-body .content a {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body .content a:hover { color: var(--accent-light); }
        .article-body .content blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 24px;
            margin: 1.6em 0;
            background: rgba(245, 200, 66, 0.05);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-muted);
            font-style: italic;
        }
        .article-body .content img {
            border-radius: var(--radius-md);
            margin: 1.6em 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body .content code {
            background: rgba(255,255,255,0.06);
            padding: 2px 10px;
            border-radius: 6px;
            font-size: 0.9em;
            color: var(--accent-light);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .article-not-found i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            display: block;
        }
        .article-not-found h2 {
            font-size: 1.8rem;
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .article-not-found .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--accent); }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid rgba(255,255,255,0.04);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            color: var(--text-body);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: color var(--transition);
        }
        .sidebar-list a:hover { color: var(--accent); }
        .sidebar-list a i { color: var(--accent); font-size: 0.7rem; opacity: 0.6; }

        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-tags a {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(245, 200, 66, 0.08);
            border: 1px solid rgba(245, 200, 66, 0.12);
            border-radius: 50px;
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: background var(--transition), color var(--transition);
        }
        .sidebar-tags a:hover {
            background: rgba(245, 200, 66, 0.18);
            color: var(--accent);
        }

        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr 260px; gap: 32px; }
        }
        @media (max-width: 820px) {
            .article-layout { grid-template-columns: 1fr; gap: 32px; }
            .article-body { padding: 28px; }
            .sidebar-card { padding: 20px; }
        }
        @media (max-width: 520px) {
            .article-body { padding: 18px; }
            .article-body .content { font-size: 0.95rem; }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: 50px;
            border: none;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            text-decoration: none;
            color: var(--primary-dark);
            background: var(--accent);
        }
        .btn:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 200, 66, 0.3);
            color: var(--primary-dark);
        }
        .btn:active { transform: translateY(0); }
        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--accent);
            color: var(--accent);
        }
        .btn-outline:hover {
            background: rgba(245, 200, 66, 0.1);
            box-shadow: none;
            color: var(--accent-light);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
            margin-top: 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { font-size: 1.3rem; margin-bottom: 14px; }
        .footer-brand p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.7; max-width: 360px; }
        .footer-social { display: flex; gap: 12px; margin-top: 18px; }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.05);
            color: var(--text-muted);
            font-size: 1.1rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .footer-social a:hover { background: rgba(245, 200, 66, 0.15); color: var(--accent); transform: translateY(-3px); }
        .footer-col h4 {
            font-size: 1rem;
            margin-bottom: 16px;
            color: var(--text-light);
        }
        .footer-col a {
            display: block;
            color: var(--text-muted);
            font-size: 0.88rem;
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .footer-bottom a { color: var(--accent); }
        .footer-bottom a:hover { text-decoration: underline; }

        @media (max-width: 820px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .footer { padding: 40px 0 20px; }
        }

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

        /* ===== Related Posts (if needed) ===== */
        .related-section {
            padding: 40px 0 60px;
            background: var(--bg-section);
            border-top: 1px solid var(--border-color);
        }
        .related-section h2 {
            font-size: 1.6rem;
            margin-bottom: 28px;
            text-align: center;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .related-card .card-body {
            padding: 18px 20px 22px;
        }
        .related-card .card-body h3 {
            font-size: 1rem;
            margin-bottom: 8px;
        }
        .related-card .card-body h3 a { color: var(--text-light); }
        .related-card .card-body h3 a:hover { color: var(--accent); }
        .related-card .card-body .meta {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        @media (max-width: 820px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .related-grid { grid-template-columns: 1fr; }
        }

        /* ===== Smooth scrollbar ===== */
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: var(--bg-dark); }
        ::-webkit-scrollbar-thumb { background: var(--primary-light); border-radius: 10px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a4a;
            --primary-light: #2c4a7c;
            --primary-dark: #0f1a30;
            --accent: #e8b84b;
            --accent-light: #f0d080;
            --accent-dark: #c99a2e;
            --bg-dark: #0a0e1a;
            --bg-card: #111827;
            --bg-section: #0f1525;
            --bg-light: #1a2540;
            --text-primary: #f0f4fa;
            --text-secondary: #b0c4de;
            --text-muted: #7a8fa8;
            --border-color: rgba(232, 184, 75, 0.15);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 56px rgba(0, 0, 0, 0.5);
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-h: 76px;
        }

        /* ===== 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-primary);
            background: var(--bg-dark);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-light);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

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

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

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 14, 26, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            height: var(--header-h);
            transition: var(--transition);
        }

        .header:hover {
            border-bottom-color: rgba(232, 184, 75, 0.3);
        }

        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo i {
            color: var(--accent);
            font-size: 26px;
        }
        .logo span {
            color: var(--accent);
        }
        .logo:hover {
            color: var(--text-primary);
            opacity: 0.92;
        }

        .nav-search {
            flex: 1;
            max-width: 460px;
            min-width: 180px;
        }

        .search-form {
            display: flex;
            align-items: center;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            overflow: hidden;
            transition: var(--transition);
        }
        .search-form:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(232, 184, 75, 0.15);
        }
        .search-form input {
            flex: 1;
            padding: 10px 18px;
            background: transparent;
            color: var(--text-primary);
            font-size: 15px;
            min-width: 0;
        }
        .search-form input::placeholder {
            color: var(--text-muted);
        }
        .search-form button {
            padding: 10px 18px 10px 8px;
            color: var(--text-muted);
            font-size: 16px;
            transition: var(--transition);
        }
        .search-form button:hover {
            color: var(--accent);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--text-primary);
            background: rgba(232, 184, 75, 0.08);
        }
        .nav-links a.active {
            color: var(--accent);
            background: rgba(232, 184, 75, 0.12);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            border-radius: 8px;
            background: transparent;
            border: 1px solid var(--border-color);
            flex-shrink: 0;
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-toggle:hover span {
            background: var(--accent);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            padding: calc(var(--header-h) + 40px) 0 50px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-section) 50%, var(--bg-dark) 100%);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .page-banner h1 {
            font-size: clamp(28px, 5vw, 48px);
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .page-banner h1 i {
            color: var(--accent);
            margin-right: 12px;
        }
        .page-banner p {
            font-size: clamp(15px, 2vw, 18px);
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto 20px;
            line-height: 1.8;
        }
        .page-banner .banner-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-top: 8px;
        }
        .page-banner .banner-tags span {
            display: inline-block;
            padding: 5px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(232, 184, 75, 0.1);
            color: var(--accent-light);
            border: 1px solid rgba(232, 184, 75, 0.2);
        }

        /* ===== Section General ===== */
        .section {
            padding: 70px 0;
        }
        .section-alt {
            background: var(--bg-section);
        }
        .section-title {
            font-size: clamp(24px, 3.5vw, 36px);
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 620px;
            line-height: 1.7;
            margin-bottom: 36px;
        }
        .section-title-centered {
            text-align: center;
        }
        .section-subtitle-centered {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-label {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 1px;
            text-transform: uppercase;
            background: rgba(232, 184, 75, 0.1);
            color: var(--accent);
            border: 1px solid rgba(232, 184, 75, 0.2);
            margin-bottom: 12px;
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            border-color: rgba(232, 184, 75, 0.25);
            box-shadow: var(--shadow-md);
        }
        .card-image {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: var(--bg-light);
        }
        .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .card:hover .card-image img {
            transform: scale(1.05);
        }
        .card-image .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(232, 184, 75, 0.9);
            color: var(--bg-dark);
            backdrop-filter: blur(4px);
        }
        .card-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-body h3 a {
            color: inherit;
        }
        .card-body h3 a:hover {
            color: var(--accent);
        }
        .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 14px;
        }
        .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .card-body .card-meta i {
            margin-right: 4px;
            color: var(--accent);
        }

        /* ===== Featured / List ===== */
        .featured-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .featured-item {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            align-items: flex-start;
        }
        .featured-item:hover {
            border-color: rgba(232, 184, 75, 0.25);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }
        .featured-item .fi-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(232, 184, 75, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--accent);
            border: 1px solid rgba(232, 184, 75, 0.15);
        }
        .featured-item .fi-content h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .featured-item .fi-content p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Step / Process ===== */
        .step-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 30px 24px;
            border: 1px solid var(--border-color);
            text-align: center;
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            border-color: rgba(232, 184, 75, 0.25);
            transform: translateY(-4px);
            box-shadow: var(--shadow-sm);
        }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(232, 184, 75, 0.12);
            color: var(--accent);
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            border: 1px solid rgba(232, 184, 75, 0.2);
        }
        .step-card h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            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-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(232, 184, 75, 0.2);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            transition: var(--transition);
            gap: 12px;
            background: transparent;
            width: 100%;
            text-align: left;
        }
        .faq-question:hover {
            color: var(--accent);
        }
        .faq-question i {
            font-size: 18px;
            color: var(--accent);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            text-align: center;
            padding: 60px 0;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.06;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: clamp(22px, 3vw, 32px);
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 16px;
            font-weight: 600;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--bg-dark);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            color: var(--bg-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232, 184, 75, 0.3);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-color);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(232, 184, 75, 0.1);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 14px;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-color);
            padding: 56px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 20px;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 320px;
            margin-bottom: 18px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-light);
            color: var(--text-muted);
            font-size: 16px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--bg-dark);
            border-color: var(--accent);
            transform: translateY(-2px);
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-secondary);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .step-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .featured-list {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                padding: 0 16px;
            }
            .nav-links {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(10, 14, 26, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 20px 24px 28px;
                gap: 6px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                pointer-events: none;
                box-shadow: var(--shadow-lg);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-links a {
                width: 100%;
                padding: 12px 20px;
                font-size: 16px;
                border-radius: 10px;
            }
            .nav-links a.active::after {
                display: none;
            }
            .nav-links a.active {
                background: rgba(232, 184, 75, 0.12);
            }
            .nav-toggle {
                display: flex;
            }
            .nav-search {
                max-width: 200px;
                min-width: 120px;
            }
            .search-form input {
                padding: 8px 12px;
                font-size: 14px;
            }
            .search-form button {
                padding: 8px 12px 8px 6px;
            }

            .page-banner {
                padding: calc(var(--header-h) + 28px) 0 36px;
            }

            .section {
                padding: 48px 0;
            }

            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .step-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .featured-list {
                gap: 16px;
            }
            .featured-item {
                padding: 16px;
                gap: 14px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .cta-section {
                padding: 44px 0;
            }
            .cta-buttons .btn {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                gap: 10px;
            }
            .nav-search {
                max-width: 140px;
                min-width: 80px;
            }
            .search-form input {
                padding: 6px 10px;
                font-size: 13px;
            }
            .search-form button {
                padding: 6px 10px 6px 4px;
                font-size: 14px;
            }
            .logo {
                font-size: 17px;
                gap: 6px;
            }
            .logo i {
                font-size: 20px;
            }

            .page-banner h1 {
                font-size: 24px;
            }
            .page-banner .banner-tags span {
                font-size: 12px;
                padding: 4px 12px;
            }

            .section-title {
                font-size: 22px;
            }

            .card-body {
                padding: 16px 18px 18px;
            }
            .card-body h3 {
                font-size: 16px;
            }

            .step-card {
                padding: 22px 18px;
            }

            .faq-question {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 14px;
            }

            .footer {
                padding: 36px 0 18px;
            }
            .footer-brand p {
                font-size: 13px;
            }
        }

        /* ===== Fade In Animation ===== */
        .fade-in {
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
            justify-content: center;
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb span {
            color: var(--accent);
        }
        .breadcrumb i {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ===== Pagination ===== */
        .pagination {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 8px;
            margin-top: 40px;
        }
        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 12px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .pagination a:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .pagination .current {
            background: var(--accent);
            color: var(--bg-dark);
            border-color: var(--accent);
            font-weight: 700;
        }
        .pagination .disabled {
            opacity: 0.4;
            pointer-events: none;
        }

        /* ===== Tag Cloud ===== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 20px;
        }
        .tag-cloud a {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 500;
            background: var(--bg-card);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .tag-cloud a:hover {
            background: rgba(232, 184, 75, 0.1);
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }