/* roulang page: index */
:root {
            --primary: #1a1a2e;
            --primary-light: #16213e;
            --primary-dark: #0f0f1a;
            --accent: #e94560;
            --accent-hover: #d63851;
            --accent-light: #ff6b81;
            --secondary: #0f3460;
            --bg-light: #f8f9fc;
            --bg-dark: #1a1a2e;
            --bg-card: #ffffff;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8a8aaa;
            --text-light: #f8f9fc;
            --border-color: #e8e8f0;
            --border-radius: 16px;
            --border-radius-sm: 10px;
            --border-radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.06);
            --shadow-md: 0 8px 30px rgba(26, 26, 46, 0.10);
            --shadow-lg: 0 20px 60px rgba(26, 26, 46, 0.15);
            --shadow-xl: 0 30px 80px rgba(26, 26, 46, 0.20);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --header-height: 76px;
            --spacing-section: 100px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            color: var(--text-primary);
            background: var(--bg-light);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-height);
        }

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

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

        .container {
            max-width: var(--container-max);
            padding-left: 24px;
            padding-right: 24px;
            margin: 0 auto;
            width: 100%;
        }

        /* ===== Header / Nav (SaaS 命令栏风格) ===== */
        .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(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid rgba(232, 232, 240, 0.5);
            transition: var(--transition);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo i {
            color: var(--accent);
            font-size: 1.6rem;
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            opacity: 0.85;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0 20px;
        }
        .main-nav .nav-link {
            padding: 8px 18px;
            border-radius: 10px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .main-nav .nav-link:hover {
            color: var(--primary);
            background: rgba(26, 26, 46, 0.05);
        }
        .main-nav .nav-link.active {
            color: var(--accent);
            background: rgba(233, 69, 96, 0.08);
        }
        .main-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .header-actions .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 0 16px;
            height: 44px;
            width: 220px;
            transition: var(--transition);
        }
        .header-actions .search-box:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 4px rgba(233, 69, 96, 0.10);
        }
        .header-actions .search-box i {
            color: var(--text-muted);
            font-size: 1rem;
            margin-right: 10px;
        }
        .header-actions .search-box input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.9rem;
            color: var(--text-primary);
            width: 100%;
        }
        .header-actions .search-box input::placeholder {
            color: var(--text-muted);
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: 12px;
            font-size: 0.9rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
            color: #fff;
            box-shadow: 0 4px 15px rgba(233, 69, 96, 0.30);
        }
        .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(233, 69, 96, 0.40);
            color: #fff;
        }
        .btn-cta:active {
            transform: translateY(0);
        }
        .btn-cta i {
            font-size: 1rem;
        }

        .btn-outline-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: 12px;
            font-size: 0.9rem;
            font-weight: 600;
            border: 2px solid var(--border-color);
            background: transparent;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-outline-cta:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(233, 69, 96, 0.04);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            padding: 4px 8px;
            cursor: pointer;
        }

        /* ===== Hero ===== */
        .hero-section {
            padding: 80px 0 60px;
            background: linear-gradient(165deg, var(--bg-light) 0%, #fff 40%, rgba(233, 69, 96, 0.04) 100%);
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(233, 69, 96, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(15, 52, 96, 0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 860px;
            margin: 0 auto;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            background: rgba(233, 69, 96, 0.08);
            border: 1px solid rgba(233, 69, 96, 0.15);
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--accent);
            margin-bottom: 24px;
        }
        .hero-badge i {
            font-size: 0.8rem;
        }
        .hero-title {
            font-size: 3.6rem;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -1.5px;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.2rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-actions .btn-cta {
            padding: 14px 40px;
            font-size: 1.05rem;
        }
        .hero-actions .btn-outline-cta {
            padding: 14px 40px;
            font-size: 1.05rem;
        }
        .hero-stats {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 48px;
            margin-top: 56px;
            padding-top: 32px;
            border-top: 1px solid var(--border-color);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .hero-stat .label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 2px;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-alt {
            background: var(--bg-card);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-light);
        }
        .section-dark .section-title {
            color: #fff;
        }
        .section-dark .section-sub {
            color: rgba(255, 255, 255, 0.7);
        }

        .section-header {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }
        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            letter-spacing: -0.8px;
            color: var(--primary);
            margin-bottom: 16px;
            line-height: 1.2;
        }
        .section-sub {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .section-tag {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(233, 69, 96, 0.08);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card-grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        .feature-card {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            padding: 36px 30px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .feature-card .icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: #fff;
            margin-bottom: 20px;
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
        }
        .feature-card .icon.alt {
            background: linear-gradient(135deg, var(--secondary), var(--primary-light));
        }
        .feature-card .icon.green {
            background: linear-gradient(135deg, #2d6a4f, #40916c);
        }
        .feature-card .icon.purple {
            background: linear-gradient(135deg, #5a189a, #7b2cbf);
        }
        .feature-card .icon.orange {
            background: linear-gradient(135deg, #e85d04, #f48c06);
        }
        .feature-card .icon.teal {
            background: linear-gradient(135deg, #006d77, #83c5be);
        }
        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }
        .feature-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 16px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--accent);
        }
        .feature-card .card-link i {
            transition: var(--transition);
        }
        .feature-card .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .category-card {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            padding: 32px 28px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--accent-light));
            opacity: 0;
            transition: var(--transition);
        }
        .category-card:hover::before {
            opacity: 1;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .category-card .icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
            margin: 0 auto 18px;
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
        }
        .category-card .icon.c2 {
            background: linear-gradient(135deg, var(--secondary), #1a5276);
        }
        .category-card .icon.c3 {
            background: linear-gradient(135deg, #2d6a4f, #52b788);
        }
        .category-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .category-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 16px;
            line-height: 1.6;
        }
        .category-card .badge-count {
            display: inline-block;
            padding: 2px 14px;
            border-radius: 50px;
            background: rgba(233, 69, 96, 0.08);
            color: var(--accent);
            font-size: 0.8rem;
            font-weight: 600;
        }
        .category-card a {
            color: inherit;
            display: block;
        }
        .category-card a:hover {
            text-decoration: none;
        }

        /* ===== 内容列表 (资讯) ===== */
        .content-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .content-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 24px 28px;
            background: var(--bg-card);
            border-radius: var(--border-radius-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .content-item:hover {
            border-color: rgba(233, 69, 96, 0.20);
            box-shadow: var(--shadow-sm);
            transform: translateX(4px);
        }
        .content-item .item-index {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(233, 69, 96, 0.08);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
        }
        .content-item .item-body {
            flex: 1;
            min-width: 0;
        }
        .content-item .item-body h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .content-item .item-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .content-item .item-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 8px;
            font-size: 0.8rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .content-item .item-meta .tag {
            padding: 2px 12px;
            border-radius: 50px;
            background: rgba(15, 52, 96, 0.06);
            color: var(--secondary);
            font-weight: 500;
        }
        .content-item .item-link {
            flex-shrink: 0;
            color: var(--text-muted);
            font-size: 1.2rem;
            transition: var(--transition);
            margin-top: 4px;
        }
        .content-item:hover .item-link {
            color: var(--accent);
            transform: translateX(4px);
        }
        .content-item a {
            color: inherit;
        }
        .content-item a:hover {
            text-decoration: none;
        }

        /* ===== 数据/流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--border-radius);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            margin: 0 auto 18px;
            counter-increment: step;
        }
        .step-card .step-num::after {
            content: counter(step);
        }
        .step-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.6;
        }
        .step-card .step-arrow {
            position: absolute;
            right: -18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 1.4rem;
            opacity: 0.3;
        }
        .step-card:last-child .step-arrow {
            display: none;
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .stat-card {
            text-align: center;
            padding: 32px 20px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--border-radius);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-3px);
        }
        .stat-card .stat-num {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -1px;
            line-height: 1;
        }
        .stat-card .stat-num .suffix {
            font-size: 1.6rem;
            font-weight: 600;
            color: var(--accent-light);
        }
        .stat-card .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 8px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--border-radius-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(233, 69, 96, 0.15);
        }
        .faq-question {
            padding: 20px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            transition: var(--transition);
            gap: 16px;
            user-select: none;
        }
        .faq-question:hover {
            color: var(--accent);
        }
        .faq-question i {
            transition: var(--transition);
            color: var(--text-muted);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 28px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 28px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(233, 69, 96, 0.12) 0%, transparent 70%);
            border-radius: 50%;
        }
        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.8px;
            margin-bottom: 18px;
        }
        .cta-content p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .cta-content .btn-cta {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.20);
        }
        .cta-content .btn-cta:hover {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 8px 30px rgba(233, 69, 96, 0.40);
        }
        .cta-content .btn-outline-cta {
            border-color: rgba(255, 255, 255, 0.25);
            color: rgba(255, 255, 255, 0.85);
        }
        .cta-content .btn-outline-cta:hover {
            border-color: #fff;
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }

        /* ===== 空状态 ===== */
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
            font-size: 1rem;
        }
        .empty-state i {
            font-size: 2.4rem;
            margin-bottom: 16px;
            opacity: 0.3;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .card-grid,
            .card-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid .step-card:nth-child(2n) .step-arrow {
                display: none;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .header-actions .search-box {
                width: 160px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
                --spacing-section: 60px;
            }

            .main-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-lg);
                margin: 0;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav .nav-link {
                width: 100%;
                padding: 12px 16px;
            }
            .main-nav .nav-link.active::after {
                display: none;
            }
            .header-actions .search-box {
                width: 140px;
            }
            .header-actions .btn-cta span {
                display: none;
            }
            .header-actions .btn-cta {
                padding: 10px 16px;
            }
            .mobile-toggle {
                display: block;
            }

            .hero-title {
                font-size: 2.2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
                flex-wrap: wrap;
            }
            .hero-stat .num {
                font-size: 1.6rem;
            }

            .section-title {
                font-size: 1.8rem;
            }

            .card-grid,
            .card-grid-2,
            .card-grid-4 {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid .step-card .step-arrow {
                display: none;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .content-item {
                flex-direction: column;
                gap: 12px;
            }
            .content-item .item-link {
                align-self: flex-end;
            }

            .cta-content h2 {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn-cta,
            .hero-actions .btn-outline-cta {
                width: 100%;
                justify-content: center;
            }
            .header-actions .search-box {
                width: 100px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px;
                font-size: 0.9rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --secondary: #7c3aed;
            --accent: #f59e0b;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-dark: #0f172a;
            --text: #1e293b;
            --text-light: #64748b;
            --text-inverse: #ffffff;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1280px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            margin: 0;
            padding: 0;
            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(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }

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

        /* ===== Header & Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.6);
            transition: var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 1px 8px rgba(0, 0, 0, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            gap: 16px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            text-decoration: none;
            flex-shrink: 0;
            letter-spacing: -0.3px;
        }
        .logo i {
            color: var(--primary);
            font-size: 26px;
            background: var(--primary-bg);
            padding: 8px;
            border-radius: 10px;
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            opacity: 0.9;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .main-nav .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
            text-decoration: none;
        }
        .main-nav .nav-link:hover {
            color: var(--text);
            background: var(--bg-alt);
        }
        .main-nav .nav-link.active {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .main-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .search-toggle {
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: 100px;
            padding: 8px 18px;
            font-size: 14px;
            color: var(--text-light);
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-toggle:hover {
            border-color: var(--primary-light);
            color: var(--text);
            background: var(--primary-bg);
        }
        .search-toggle i {
            font-size: 14px;
        }
        .search-toggle .shortcut {
            font-size: 12px;
            color: var(--text-light);
            background: var(--border);
            padding: 0 6px;
            border-radius: 4px;
            font-weight: 500;
        }

        .btn-header {
            padding: 9px 24px;
            border-radius: 100px;
            font-size: 14px;
            font-weight: 600;
            border: none;
            background: var(--primary);
            color: #fff;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .btn-header:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
            color: #fff;
        }

        .navbar-toggler {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
            font-size: 20px;
            color: var(--text);
            cursor: pointer;
            transition: var(--transition);
        }
        .navbar-toggler:hover {
            background: var(--bg-alt);
        }

        /* Mobile nav */
        .mobile-nav {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 12px 0 20px;
            border-top: 1px solid var(--border);
        }
        .mobile-nav .nav-link {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 500;
            color: var(--text-light);
            text-decoration: none;
            transition: var(--transition);
        }
        .mobile-nav .nav-link:hover {
            background: var(--bg-alt);
            color: var(--text);
        }
        .mobile-nav .nav-link.active {
            color: var(--primary);
            background: var(--primary-bg);
        }

        /* ===== Page Hero ===== */
        .page-hero {
            padding: 60px 0 50px;
            background: linear-gradient(135deg, var(--primary-bg) 0%, #f0f4ff 100%);
            border-bottom: 1px solid var(--border);
        }
        .page-hero h1 {
            font-size: 38px;
            font-weight: 800;
            color: var(--text);
            margin: 0 0 12px;
            letter-spacing: -0.5px;
            line-height: 1.2;
        }
        .page-hero p {
            font-size: 18px;
            color: var(--text-light);
            max-width: 720px;
            margin: 0 0 20px;
            line-height: 1.7;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .breadcrumb-custom a {
            color: var(--text-light);
            text-decoration: none;
        }
        .breadcrumb-custom a:hover {
            color: var(--primary);
        }
        .breadcrumb-custom span {
            color: var(--text);
        }
        .breadcrumb-custom .sep {
            color: var(--border);
        }

        /* ===== Section ===== */
        .section {
            padding: 70px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-title {
            font-size: 30px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 10px;
            letter-spacing: -0.3px;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto 40px;
            line-height: 1.7;
        }
        .text-center .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Cards ===== */
        .card-guide {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 28px;
            transition: var(--transition);
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .card-guide:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-light);
        }
        .card-guide .step-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 18px;
        }
        .card-guide h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 10px;
        }
        .card-guide p {
            font-size: 15px;
            color: var(--text-light);
            margin: 0 0 16px;
            line-height: 1.7;
        }
        .card-guide .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 13px;
            font-weight: 500;
            background: var(--primary-bg);
            color: var(--primary);
        }

        .card-feature {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 24px;
            transition: var(--transition);
            height: 100%;
            text-align: center;
        }
        .card-feature:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .card-feature .icon-wrap {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: var(--primary-bg);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            margin: 0 auto 18px;
            transition: var(--transition);
        }
        .card-feature:hover .icon-wrap {
            background: var(--primary);
            color: #fff;
        }
        .card-feature h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 8px;
        }
        .card-feature p {
            font-size: 14px;
            color: var(--text-light);
            margin: 0;
            line-height: 1.6;
        }

        .card-tip {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px 24px;
            transition: var(--transition);
            height: 100%;
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .card-tip:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .card-tip .tip-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: #fef3c7;
            color: #d97706;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
        }
        .card-tip .tip-icon.blue {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .card-tip .tip-icon.green {
            background: #d1fae5;
            color: #059669;
        }
        .card-tip .tip-icon.red {
            background: #fee2e2;
            color: #dc2626;
        }
        .card-tip h5 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 4px;
        }
        .card-tip p {
            font-size: 14px;
            color: var(--text-light);
            margin: 0;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
            background: var(--bg);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-light);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            padding: 0 22px 18px;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 70px 0;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: #fff;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 32px;
            font-weight: 800;
            margin: 0 0 12px;
            letter-spacing: -0.3px;
        }
        .cta-section p {
            font-size: 18px;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 40px;
            border-radius: 100px;
            font-size: 16px;
            font-weight: 600;
            border: none;
            background: #fff;
            color: var(--primary);
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
        }
        .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
            color: var(--primary-dark);
        }
        .btn-cta-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 40px;
            border-radius: 100px;
            font-size: 16px;
            font-weight: 600;
            border: 2px solid rgba(255, 255, 255, 0.4);
            background: transparent;
            color: #fff;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
            margin-left: 12px;
        }
        .btn-cta-outline:hover {
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 30px;
            font-size: 14px;
        }
        .site-footer .logo {
            color: #fff;
        }
        .site-footer .logo span {
            -webkit-text-fill-color: #fff;
        }
        .site-footer .logo i {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            line-height: 1.7;
            margin: 16px 0 0;
            max-width: 360px;
        }
        .footer-col h5 {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin: 0 0 18px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            color: rgba(255, 255, 255, 0.5);
            font-size: 13px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 62px;
            }
            .main-nav {
                display: none;
            }
            .navbar-toggler {
                display: block;
            }
            .mobile-nav.open {
                display: flex;
            }
            .nav-right .search-toggle .shortcut {
                display: none;
            }
            .nav-right .search-toggle span {
                display: none;
            }
            .nav-right .search-toggle {
                padding: 8px 12px;
            }
            .btn-header {
                padding: 8px 18px;
                font-size: 13px;
            }
            .page-hero {
                padding: 40px 0 36px;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero p {
                font-size: 16px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .btn-cta-outline {
                margin-left: 0;
                margin-top: 12px;
            }
            .card-tip {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-hero h1 {
                font-size: 22px;
            }
            .section-title {
                font-size: 20px;
            }
            .card-guide {
                padding: 24px 20px;
            }
            .card-feature {
                padding: 22px 18px;
            }
        }

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

        /* Skeleton placeholder for cms */
        .cms-placeholder {
            background: linear-gradient(90deg, var(--bg-alt) 25%, var(--border) 50%, var(--bg-alt) 75%);
            background-size: 200% 100%;
            animation: shimmer 1.5s infinite;
            border-radius: var(--radius-sm);
        }
        @keyframes shimmer {
            0% {
                background-position: 200% 0;
            }
            100% {
                background-position: -200% 0;
            }
        }

/* roulang page: article */
:root {
            --primary: #0b0e1a;
            --primary-light: #1a1a3e;
            --secondary: #2a1b5e;
            --accent: #f0c040;
            --accent-hover: #d9a830;
            --bg-dark: #0b0e1a;
            --bg-card: #ffffff;
            --bg-body: #f5f7fc;
            --text-dark: #1a1a2e;
            --text-body: #2d2d44;
            --text-muted: #6b6b82;
            --text-light: #f0f0f5;
            --border-light: #e2e5f0;
            --shadow-sm: 0 2px 8px rgba(11,14,26,0.06);
            --shadow-md: 0 8px 30px rgba(11,14,26,0.1);
            --shadow-lg: 0 20px 50px rgba(11,14,26,0.15);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }

        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

        html { scroll-behavior: smooth; }

        body {
            font-family: var(--font-base);
            background: var(--bg-body);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }

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

        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

        /* ===== HEADER / NAV ===== */
        .site-header {
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--secondary) 100%);
            border-bottom: 1px solid rgba(240,192,64,0.15);
            position: sticky;
            top: 0;
            z-index: 1050;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            padding: 0 24px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 1.35rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            text-decoration: none;
        }
        .logo i { color: var(--accent); font-size: 1.5rem; }
        .logo span { background: linear-gradient(90deg, #fff, var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { color: #fff; opacity: 0.9; }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .main-nav .nav-link {
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
            text-decoration: none;
        }
        .main-nav .nav-link:hover {
            color: #fff;
            background: rgba(255,255,255,0.08);
        }
        .main-nav .nav-link.active {
            color: #fff;
            background: rgba(240,192,64,0.15);
            box-shadow: inset 0 -2px 0 var(--accent);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: rgba(255,255,255,0.08);
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: 100px;
            padding: 0 16px;
            transition: var(--transition);
        }
        .search-box:focus-within { border-color: var(--accent); background: rgba(255,255,255,0.12); }
        .search-box input {
            background: none;
            border: none;
            outline: none;
            color: #fff;
            font-size: 0.85rem;
            padding: 8px 0;
            width: 160px;
        }
        .search-box input::placeholder { color: rgba(255,255,255,0.4); }
        .search-box i { color: rgba(255,255,255,0.4); font-size: 0.9rem; }

        .btn-accent {
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
            color: var(--primary);
            font-weight: 600;
            font-size: 0.85rem;
            padding: 9px 24px;
            border-radius: 100px;
            border: none;
            transition: var(--transition);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .btn-accent:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(240,192,64,0.35); color: var(--primary); }
        .btn-accent:active { transform: translateY(0); }

        .btn-outline-accent {
            background: transparent;
            border: 2px solid var(--accent);
            color: var(--accent);
            font-weight: 600;
            font-size: 0.85rem;
            padding: 8px 22px;
            border-radius: 100px;
            transition: var(--transition);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-outline-accent:hover { background: var(--accent); color: var(--primary); transform: translateY(-2px); }

        .mobile-toggle { display: none; background: none; border: none; color: #fff; font-size: 1.5rem; cursor: pointer; padding: 6px; }

        /* ===== ARTICLE PAGE ===== */
        .article-page {
            padding-top: 40px;
            padding-bottom: 60px;
        }

        .article-breadcrumb {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .article-breadcrumb a { color: var(--text-muted); text-decoration: none; }
        .article-breadcrumb a:hover { color: var(--accent); }
        .article-breadcrumb .sep { color: var(--text-muted); opacity: 0.4; }

        .article-header-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 40px 44px;
            box-shadow: var(--shadow-sm);
            margin-bottom: 28px;
            border: 1px solid var(--border-light);
        }

        .article-category-badge {
            display: inline-block;
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            color: var(--accent);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 100px;
            letter-spacing: 0.3px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .article-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-dark);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 0.85rem;
            color: var(--text-muted);
            align-items: center;
        }
        .article-meta i { margin-right: 6px; color: var(--accent); opacity: 0.7; }
        .article-meta .meta-item { display: flex; align-items: center; }

        .article-body-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 44px;
            box-shadow: var(--shadow-sm);
            margin-bottom: 28px;
            border: 1px solid var(--border-light);
        }

        .article-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-body);
        }
        .article-body h2 { font-size: 1.6rem; font-weight: 700; color: var(--text-dark); margin-top: 36px; margin-bottom: 16px; }
        .article-body h3 { font-size: 1.25rem; font-weight: 600; color: var(--text-dark); margin-top: 28px; margin-bottom: 12px; }
        .article-body p { margin-bottom: 20px; }
        .article-body ul, .article-body ol { margin-bottom: 20px; padding-left: 24px; }
        .article-body li { margin-bottom: 8px; }
        .article-body a { color: var(--primary-light); text-decoration: underline; text-underline-offset: 3px; }
        .article-body a:hover { color: var(--accent); }
        .article-body blockquote {
            border-left: 4px solid var(--accent);
            background: #f8f6f0;
            padding: 20px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-muted);
        }
        .article-body img { border-radius: var(--radius-sm); margin: 24px 0; box-shadow: var(--shadow-sm); }
        .article-body code { background: #f0f0f5; padding: 2px 8px; border-radius: 4px; font-size: 0.9em; color: var(--secondary); }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .article-tags .tag {
            background: #f0f2f8;
            color: var(--text-muted);
            font-size: 0.8rem;
            padding: 5px 16px;
            border-radius: 100px;
            transition: var(--transition);
            text-decoration: none;
        }
        .article-tags .tag:hover { background: var(--primary-light); color: #fff; }

        .article-share {
            display: flex;
            gap: 12px;
            align-items: center;
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid var(--border-light);
        }
        .article-share span { font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }
        .article-share a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #f0f2f8;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            transition: var(--transition);
            font-size: 1rem;
            text-decoration: none;
        }
        .article-share a:hover { background: var(--primary-light); color: #fff; transform: translateY(-3px); }

        /* ===== NOT FOUND ===== */
        .not-found-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 60px 44px;
            box-shadow: var(--shadow-sm);
            text-align: center;
            border: 1px solid var(--border-light);
        }
        .not-found-card i { font-size: 3rem; color: var(--text-muted); opacity: 0.3; margin-bottom: 20px; }
        .not-found-card h2 { font-size: 1.6rem; font-weight: 700; color: var(--text-dark); margin-bottom: 12px; }
        .not-found-card p { color: var(--text-muted); margin-bottom: 24px; }

        /* ===== RELATED ARTICLES ===== */
        .related-section {
            margin-top: 40px;
        }
        .related-section .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-section .section-title i { color: var(--accent); }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            text-decoration: none;
            display: block;
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--accent); }
        .related-card .rc-cat {
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 8px;
        }
        .related-card .rc-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-dark);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .rc-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .related-card .rc-meta i { margin-right: 4px; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-dark), var(--secondary));
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            margin-top: 48px;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 50%, rgba(240,192,64,0.08), transparent 60%);
            pointer-events: none;
        }
        .cta-section h2 { font-size: 1.8rem; font-weight: 700; color: #fff; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.7); max-width: 560px; margin: 0 auto 28px; font-size: 1rem; }
        .cta-section .btn-accent { font-size: 1rem; padding: 12px 36px; }

        /* ===== FOOTER ===== */
        .site-footer {
            background: linear-gradient(135deg, var(--bg-dark), var(--secondary));
            color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
            margin-top: 60px;
            border-top: 1px solid rgba(240,192,64,0.1);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .logo { margin-bottom: 16px; }
        .footer-brand p { font-size: 0.88rem; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 360px; }
        .footer-col h5 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: 18px; }
        .footer-col ul { list-style: none; padding: 0; margin: 0; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: rgba(255,255,255,0.55); font-size: 0.88rem; text-decoration: none; transition: var(--transition); }
        .footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 24px 0;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: var(--accent); text-decoration: none; }
        .footer-bottom a:hover { text-decoration: underline; }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .article-title { font-size: 1.8rem; }
        }

        @media (max-width: 768px) {
            .header-inner { height: 64px; }
            .main-nav { display: none; }
            .nav-actions .search-box { display: none; }
            .mobile-toggle { display: block; }

            .main-nav.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--bg-dark);
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid rgba(240,192,64,0.15);
                box-shadow: var(--shadow-lg);
            }
            .main-nav.open .nav-link { padding: 12px 18px; width: 100%; }

            .article-header-card { padding: 28px 24px; }
            .article-body-card { padding: 28px 24px; }
            .article-title { font-size: 1.5rem; }

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

            .cta-section { padding: 40px 24px; }
            .cta-section h2 { font-size: 1.4rem; }

            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .header-inner { padding: 0 16px; }
            .article-header-card { padding: 20px 16px; }
            .article-body-card { padding: 20px 16px; }
            .article-title { font-size: 1.3rem; }
            .article-body { font-size: 1rem; }
            .article-meta { gap: 12px; font-size: 0.8rem; }
            .cta-section { padding: 32px 16px; }
            .cta-section h2 { font-size: 1.2rem; }
            .not-found-card { padding: 40px 20px; }
            .btn-accent { padding: 8px 20px; font-size: 0.8rem; }
            .logo { font-size: 1.1rem; }
            .logo i { font-size: 1.2rem; }
        }

        /* ===== UTILITY ===== */
        .text-accent { color: var(--accent); }
        .bg-gradient-dark { background: linear-gradient(135deg, var(--bg-dark), var(--secondary)); }
        .mb-0 { margin-bottom: 0; }
        .mt-2 { margin-top: 8px; }
        .gap-2 { gap: 8px; }
        .d-flex { display: flex; }
        .align-center { align-items: center; }
        .flex-wrap { flex-wrap: wrap; }