/* roulang page: index */
:root {
            --primary: #0a1628;
            --primary-light: #1a2a6c;
            --primary-mid: #11224a;
            --accent: #d4a830;
            --accent-light: #f0c040;
            --accent-glow: rgba(212, 168, 48, 0.3);
            --bg-dark: #050e1c;
            --bg-card: rgba(26, 42, 108, 0.25);
            --bg-card-hover: rgba(26, 42, 108, 0.4);
            --text-primary: #f0f4ff;
            --text-secondary: #b8c8e8;
            --text-muted: #7a8aaa;
            --border-color: rgba(212, 168, 48, 0.15);
            --border-glow: rgba(212, 168, 48, 0.3);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(212, 168, 48, 0.05);
            --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(212, 168, 48, 0.15);
            --shadow-btn: 0 4px 20px rgba(212, 168, 48, 0.3);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            overflow-x: hidden;
        }

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

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        .section-padding {
            padding: 100px 0;
        }

        .section-title {
            font-size: 2.6rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 12px;
            background: linear-gradient(135deg, #f0f4ff 0%, var(--accent-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.02em;
            line-height: 1.25;
        }

        .section-subtitle {
            text-align: center;
            color: var(--text-secondary);
            font-size: 1.1rem;
            max-width: 640px;
            margin: 0 auto 56px auto;
            line-height: 1.7;
        }

        .text-accent {
            color: var(--accent);
        }

        .text-glow {
            text-shadow: 0 0 40px rgba(212, 168, 48, 0.15);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(5, 14, 28, 0.85);
            backdrop-filter: blur(24px) saturate(1.4);
            -webkit-backdrop-filter: blur(24px) saturate(1.4);
            border-bottom: 1px solid rgba(212, 168, 48, 0.08);
            transition: var(--transition);
            height: 72px;
        }

        .site-header.scrolled {
            background: rgba(5, 14, 28, 0.95);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }
        .logo:hover {
            color: var(--accent-light);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--primary);
            box-shadow: 0 0 20px rgba(212, 168, 48, 0.2);
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-main li a {
            color: var(--text-secondary);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 6px 0;
            position: relative;
            transition: var(--transition);
            letter-spacing: 0.01em;
        }
        .nav-main li a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: var(--transition);
            box-shadow: 0 0 10px rgba(212, 168, 48, 0.3);
        }
        .nav-main li a:hover {
            color: var(--text-primary);
        }
        .nav-main li a:hover::after {
            width: 100%;
        }
        .nav-main li a.active {
            color: var(--accent-light);
        }
        .nav-main li a.active::after {
            width: 100%;
            background: var(--accent-light);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 50px;
            padding: 6px 16px 6px 20px;
            transition: var(--transition);
            min-width: 180px;
        }
        .search-box:focus-within {
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.1);
            box-shadow: 0 0 20px rgba(212, 168, 48, 0.08);
        }
        .search-box input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-primary);
            font-size: 0.9rem;
            padding: 6px 0;
            width: 100%;
        }
        .search-box input::placeholder {
            color: var(--text-muted);
        }
        .search-box button {
            background: transparent;
            border: none;
            color: var(--text-muted);
            cursor: pointer;
            padding: 4px 0 4px 12px;
            transition: var(--transition);
            font-size: 1rem;
        }
        .search-box button:hover {
            color: var(--accent);
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--accent), var(--accent-light));
            color: var(--primary);
            font-weight: 700;
            font-size: 0.95rem;
            padding: 10px 24px;
            border-radius: 50px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(212, 168, 48, 0.25);
            letter-spacing: 0.01em;
            white-space: nowrap;
        }
        .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(212, 168, 48, 0.35);
            color: var(--primary);
        }
        .btn-cta:active {
            transform: translateY(0);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 10px 20px;
            border-radius: 50px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-ghost:hover {
            border-color: var(--accent);
            color: var(--accent-light);
            background: rgba(212, 168, 48, 0.05);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 8px;
            z-index: 1001;
        }
        .hamburger span {
            width: 26px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            width: 320px;
            height: 100vh;
            background: rgba(5, 14, 28, 0.98);
            backdrop-filter: blur(32px);
            -webkit-backdrop-filter: blur(32px);
            padding: 100px 32px 40px;
            transform: translateX(100%);
            transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            z-index: 999;
            border-left: 1px solid rgba(212, 168, 48, 0.1);
            overflow-y: auto;
        }
        .mobile-menu.open {
            transform: translateX(0);
        }
        .mobile-menu ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .mobile-menu ul li a {
            display: block;
            padding: 14px 20px;
            color: var(--text-secondary);
            font-size: 1.1rem;
            font-weight: 500;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .mobile-menu ul li a:hover,
        .mobile-menu ul li a.active {
            color: var(--accent-light);
            background: rgba(212, 168, 48, 0.06);
        }
        .mobile-menu-actions {
            margin-top: 32px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .mobile-menu-actions .btn-cta {
            justify-content: center;
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding-top: 72px;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(5, 14, 28, 0.85) 0%, rgba(10, 22, 40, 0.7) 50%, rgba(5, 14, 28, 0.85) 100%);
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 30%, rgba(212, 168, 48, 0.05) 0%, transparent 70%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
            padding-top: 40px;
            padding-bottom: 40px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(212, 168, 48, 0.12);
            border: 1px solid rgba(212, 168, 48, 0.2);
            border-radius: 50px;
            padding: 8px 20px;
            font-size: 0.85rem;
            color: var(--accent-light);
            margin-bottom: 32px;
            letter-spacing: 0.05em;
            font-weight: 500;
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .hero-title {
            font-size: 4.2rem;
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #ffffff 0%, var(--accent-light) 60%, #f0c040 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.03em;
        }
        .hero-sub {
            font-size: 1.25rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 40px auto;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-actions .btn-cta {
            font-size: 1.05rem;
            padding: 14px 36px;
        }
        .hero-actions .btn-ghost {
            font-size: 1rem;
            padding: 14px 32px;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 56px;
            flex-wrap: wrap;
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat-num {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent-light);
            line-height: 1.2;
        }
        .hero-stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== Features / 核心说明 ===== */
        .features-section {
            background: linear-gradient(180deg, var(--bg-dark) 0%, var(--primary) 100%);
            position: relative;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            margin-top: 16px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 40px 32px;
            text-align: center;
            transition: var(--transition);
            backdrop-filter: blur(8px);
        }
        .feature-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-glow);
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px auto;
            background: linear-gradient(135deg, rgba(212, 168, 48, 0.15), rgba(212, 168, 48, 0.05));
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--accent-light);
            border: 1px solid rgba(212, 168, 48, 0.1);
        }
        .feature-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .feature-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== Categories / 分类入口 ===== */
        .categories-section {
            background: var(--bg-dark);
            position: relative;
        }
        .categories-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
        }
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            cursor: pointer;
            min-height: 360px;
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
        }
        .category-card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .category-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .category-card:hover .category-card-img img {
            transform: scale(1.05);
        }
        .category-card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(5, 14, 28, 0.8) 100%);
        }
        .category-card-body {
            padding: 24px 24px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .category-card-body p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            flex: 1;
        }
        .category-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .category-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(212, 168, 48, 0.1);
            color: var(--accent-light);
            border: 1px solid rgba(212, 168, 48, 0.15);
        }
        .category-arrow {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .category-card:hover .category-arrow {
            color: var(--accent-light);
            transform: translateX(4px);
        }

        /* ===== Latest Posts / 最新资讯 ===== */
        .posts-section {
            background: linear-gradient(180deg, var(--primary) 0%, var(--bg-dark) 100%);
            position: relative;
        }
        .posts-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
        }
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .post-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .post-card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .post-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .post-card:hover .post-card-img img {
            transform: scale(1.04);
        }
        .post-card-img .post-cat {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(5, 14, 28, 0.8);
            backdrop-filter: blur(8px);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent-light);
            border: 1px solid rgba(212, 168, 48, 0.15);
        }
        .post-card-body {
            padding: 24px 24px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .post-card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .post-card-body h3 a {
            color: var(--text-primary);
            transition: var(--transition);
        }
        .post-card-body h3 a:hover {
            color: var(--accent-light);
        }
        .post-card-body p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.65;
            flex: 1;
        }
        .post-card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 16px;
            padding-top: 14px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .post-card-meta i {
            margin-right: 4px;
        }
        .post-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border-color);
            font-size: 1.05rem;
        }

        /* ===== Process / 流程数据 ===== */
        .process-section {
            background: var(--bg-dark);
            position: relative;
        }
        .process-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .process-steps::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 60px;
            right: 60px;
            height: 2px;
            background: linear-gradient(90deg, var(--accent), rgba(212, 168, 48, 0.1), var(--accent));
            opacity: 0.3;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .process-step-num {
            width: 80px;
            height: 80px;
            margin: 0 auto 20px auto;
            background: linear-gradient(135deg, var(--primary-light), var(--primary-mid));
            border: 2px solid rgba(212, 168, 48, 0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-light);
            box-shadow: 0 0 30px rgba(212, 168, 48, 0.05);
            transition: var(--transition);
        }
        .process-step:hover .process-step-num {
            border-color: var(--accent);
            box-shadow: 0 0 40px rgba(212, 168, 48, 0.15);
            transform: scale(1.05);
        }
        .process-step h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-primary);
        }
        .process-step p {
            color: var(--text-secondary);
            font-size: 0.85rem;
            line-height: 1.6;
            max-width: 200px;
            margin: 0 auto;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: linear-gradient(180deg, var(--bg-dark) 0%, var(--primary) 100%);
            position: relative;
        }
        .faq-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
        }
        .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: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(212, 168, 48, 0.15);
        }
        .faq-item.open {
            border-color: var(--border-glow);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            transition: var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            color: var(--accent-light);
        }
        .faq-question i {
            color: var(--text-muted);
            transition: var(--transition);
            font-size: 0.9rem;
        }
        .faq-item.open .faq-question i {
            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.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px 24px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            position: relative;
            padding: 80px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
        }
        .cta-box {
            background: linear-gradient(135deg, var(--primary-light), var(--primary-mid));
            border: 1px solid rgba(212, 168, 48, 0.15);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 8px 48px rgba(0, 0, 0, 0.3);
        }
        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.06;
            z-index: 0;
        }
        .cta-box>* {
            position: relative;
            z-index: 1;
        }
        .cta-box h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .cta-box p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 32px auto;
            line-height: 1.7;
        }
        .cta-box .btn-cta {
            font-size: 1.05rem;
            padding: 16px 40px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid rgba(212, 168, 48, 0.06);
            padding: 48px 0 32px;
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 24px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
        }
        .footer-brand .logo-icon {
            width: 32px;
            height: 32px;
            font-size: 1rem;
        }
        .footer-links {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .footer-links li a:hover {
            color: var(--accent-light);
        }
        .footer-copy {
            color: var(--text-muted);
            font-size: 0.85rem;
            text-align: center;
            width: 100%;
            margin-top: 24px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .footer-copy a {
            color: var(--text-muted);
        }
        .footer-copy a:hover {
            color: var(--accent-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 3.2rem;
            }
            .features-grid,
            .categories-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps::before {
                display: none;
            }
            .section-title {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-main {
                display: none;
            }
            .header-actions .search-box {
                display: none;
            }
            .header-actions .btn-cta {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-menu {
                display: block;
            }
            .hero-title {
                font-size: 2.4rem;
            }
            .hero-sub {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat-num {
                font-size: 1.8rem;
            }
            .features-grid,
            .categories-grid,
            .posts-grid {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr 1fr;
                gap: 32px 16px;
            }
            .section-padding {
                padding: 60px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 36px;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 1.6rem;
            }
            .footer-inner {
                flex-direction: column;
                text-align: center;
            }
            .footer-links {
                justify-content: center;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn-cta,
            .hero-actions .btn-ghost {
                justify-content: center;
            }
            .container {
                padding: 0 16px;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-sub {
                font-size: 0.9rem;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .feature-card {
                padding: 28px 20px;
            }
            .category-card-body {
                padding: 18px 18px 22px;
            }
            .post-card-body {
                padding: 18px 18px 22px;
            }
            .cta-box {
                padding: 32px 16px;
            }
            .cta-box h2 {
                font-size: 1.3rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .mobile-menu {
                width: 100%;
            }
            .logo {
                font-size: 1.1rem;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-in {
            animation: fadeUp 0.7s ease forwards;
        }
        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }

        /* scrollbar */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary-light);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--accent);
        }

        /* selection */
        ::selection {
            background: rgba(212, 168, 48, 0.3);
            color: #fff;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a9e;
            --primary-dark: #0f1a45;
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --accent: #8b5cf6;
            --bg-dark: #0b1120;
            --bg-section: #f8f9fc;
            --bg-card: #ffffff;
            --bg-nav: rgba(11, 17, 32, 0.95);
            --text-primary: #1e293b;
            --text-secondary: #4b5563;
            --text-light: #9ca3af;
            --text-white: #ffffff;
            --border-color: #e5e7eb;
            --border-light: rgba(255, 255, 255, 0.12);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.15);
            --shadow-glow: 0 0 40px rgba(245, 158, 11, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-max: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary); }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }

        /* ===== Utility ===== */
        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; width: 100%; }
        .text-center { text-align: center; }
        .text-secondary { color: var(--text-secondary); }
        .text-light { color: var(--text-light); }
        .section-pad { padding: 80px 0; }
        .section-pad-sm { padding: 48px 0; }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
            color: var(--text-primary);
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 40px;
            line-height: 1.6;
        }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            background: var(--secondary);
            color: #1e293b;
        }
        .badge-sm { font-size: 0.7rem; padding: 2px 10px; }
        .badge-outline {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: var(--bg-nav);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: var(--transition);
        }
        .header-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .logo .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
        }
        .logo:hover { color: var(--secondary); }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-main li a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.8);
            transition: var(--transition);
            position: relative;
        }
        .nav-main li a:hover { color: #fff; background: rgba(255, 255, 255, 0.08); }
        .nav-main li a.active {
            color: #fff;
            background: var(--primary-light);
            box-shadow: 0 4px 16px rgba(45, 74, 158, 0.35);
        }
        .header-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 var(--border-light);
            border-radius: 50px;
            padding: 0 6px 0 18px;
            transition: var(--transition);
        }
        .search-box:focus-within { border-color: var(--secondary); background: rgba(255,255,255,0.12); }
        .search-box input {
            background: transparent;
            border: none;
            padding: 8px 0;
            font-size: 0.85rem;
            color: #fff;
            width: 160px;
        }
        .search-box input::placeholder { color: rgba(255,255,255,0.4); }
        .search-box button {
            background: transparent;
            color: rgba(255,255,255,0.5);
            padding: 8px 12px;
            cursor: pointer;
            border-radius: 50px;
            transition: var(--transition);
        }
        .search-box button:hover { color: var(--secondary); }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 26px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            background: linear-gradient(135deg, var(--secondary), #d97706);
            color: #1e293b;
            box-shadow: 0 4px 18px rgba(245, 158, 11, 0.3);
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(245, 158, 11, 0.4); color: #1e293b; }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            cursor: pointer;
            padding: 6px;
            border-radius: 8px;
        }
        .hamburger span {
            width: 26px;
            height: 2.5px;
            background: #fff;
            border-radius: 4px;
            transition: var(--transition);
        }

        /* ===== Article Hero ===== */
        .article-hero {
            padding: 140px 0 60px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2a6c 100%);
            position: relative;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .article-hero .container { position: relative; z-index: 2; }
        .article-hero .badge {
            margin-bottom: 16px;
            background: rgba(245, 158, 11, 0.2);
            color: var(--secondary);
            border: 1px solid rgba(245, 158, 11, 0.3);
        }
        .article-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text-white);
            max-width: 800px;
            line-height: 1.25;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
        }
        .article-meta i { margin-right: 6px; color: var(--secondary); }

        /* ===== Article Content ===== */
        .article-main {
            background: var(--bg-section);
            padding: 60px 0 80px;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 48px 52px;
            box-shadow: var(--shadow-md);
            max-width: 860px;
            margin: 0 auto;
        }
        .article-body h2 { font-size: 1.7rem; margin: 36px 0 16px; color: var(--primary); }
        .article-body h3 { font-size: 1.3rem; margin: 28px 0 12px; color: var(--text-primary); }
        .article-body p { margin-bottom: 18px; color: var(--text-secondary); font-size: 1.05rem; line-height: 1.8; }
        .article-body ul, .article-body ol { margin: 16px 0 20px 24px; color: var(--text-secondary); }
        .article-body li { margin-bottom: 8px; list-style: disc; }
        .article-body blockquote {
            border-left: 4px solid var(--secondary);
            padding: 16px 24px;
            background: #fef9ec;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
            font-style: italic;
            color: var(--text-primary);
        }
        .article-body img { border-radius: var(--radius-md); margin: 24px 0; box-shadow: var(--shadow-sm); }
        .article-body .content-empty {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-light);
        }
        .article-body .content-empty i { font-size: 3rem; margin-bottom: 16px; color: var(--text-light); display: block; }
        .article-body .content-empty a { color: var(--primary-light); font-weight: 600; }

        /* ===== Related Posts ===== */
        .related-section {
            background: var(--bg-dark);
            padding: 60px 0;
        }
        .related-section .section-title { color: var(--text-white); }
        .related-section .section-subtitle { color: rgba(255,255,255,0.6); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 16px;
        }
        .related-card {
            background: rgba(255,255,255,0.06);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: var(--transition);
            cursor: pointer;
        }
        .related-card:hover { background: rgba(255,255,255,0.10); transform: translateY(-4px); box-shadow: var(--shadow-glow); }
        .related-card .badge { margin-bottom: 10px; }
        .related-card h3 { font-size: 1.1rem; font-weight: 600; color: var(--text-white); margin-bottom: 8px; line-height: 1.4; }
        .related-card p { font-size: 0.9rem; color: rgba(255,255,255,0.6); line-height: 1.5; }
        .related-card .meta { font-size: 0.8rem; color: rgba(255,255,255,0.4); margin-top: 12px; }

        /* ===== CTA ===== */
        .article-cta {
            padding: 60px 0;
            background: linear-gradient(135deg, #1a2a6c, #0f1a45);
            text-align: center;
        }
        .article-cta h2 { color: var(--text-white); font-size: 2rem; margin-bottom: 12px; }
        .article-cta p { color: rgba(255,255,255,0.7); max-width: 560px; margin: 0 auto 28px; font-size: 1.05rem; }
        .article-cta .btn-cta { font-size: 1rem; padding: 14px 36px; }

        /* ===== Footer ===== */
        .site-footer {
            background: #070c18;
            border-top: 1px solid var(--border-light);
            padding: 48px 0 28px;
        }
        .footer-inner {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 24px;
            text-align: center;
        }
        .footer-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-brand .logo-icon { font-size: 1rem; color: var(--secondary); }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 8px 20px;
        }
        .footer-links a {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-links a:hover { color: var(--secondary); }
        .footer-copy {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.35);
            border-top: 1px solid var(--border-light);
            padding-top: 20px;
            width: 100%;
            max-width: 600px;
        }
        .footer-copy a { color: rgba(255,255,255,0.5); }
        .footer-copy a:hover { color: var(--secondary); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .nav-main { gap: 4px; }
            .nav-main li a { padding: 6px 14px; font-size: 0.85rem; }
            .search-box input { width: 120px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            .header-inner { padding: 0 16px; }
            .nav-main { display: none; }
            .hamburger { display: flex; }
            .search-box { display: none; }
            .btn-cta { padding: 8px 18px; font-size: 0.8rem; }

            .article-hero { padding: 120px 0 40px; min-height: auto; }
            .article-hero h1 { font-size: 1.8rem; }
            .article-meta { font-size: 0.8rem; gap: 10px 16px; }

            .article-body { padding: 28px 20px; }
            .article-body h2 { font-size: 1.4rem; }
            .article-body p { font-size: 0.98rem; }

            .related-grid { grid-template-columns: 1fr; gap: 20px; }
            .section-title { font-size: 1.7rem; }
            .section-pad { padding: 48px 0; }
            .article-cta h2 { font-size: 1.5rem; }
            .footer-links { gap: 6px 14px; }
        }

        @media (max-width: 520px) {
            .article-hero h1 { font-size: 1.5rem; }
            .article-body { padding: 20px 14px; }
            .article-body h2 { font-size: 1.2rem; }
            .related-card { padding: 18px; }
            .btn-cta { font-size: 0.75rem; padding: 6px 14px; }
            .logo { font-size: 1.1rem; }
            .logo .logo-icon { width: 30px; height: 30px; font-size: 0.9rem; }
        }

        /* ===== Mobile Menu ===== */
        .mobile-menu-open .nav-main {
            display: flex;
            flex-direction: column;
            position: absolute;
            top: var(--header-h);
            left: 0;
            width: 100%;
            background: var(--bg-nav);
            backdrop-filter: blur(18px);
            padding: 16px 24px 24px;
            border-bottom: 1px solid var(--border-light);
            gap: 4px;
        }
        .mobile-menu-open .nav-main li a { width: 100%; padding: 12px 18px; }
        .mobile-menu-open .search-box { display: flex; width: 100%; margin-top: 12px; }
        .mobile-menu-open .search-box input { width: 100%; }

        @media (min-width: 769px) {
            .hamburger { display: none !important; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a4a;
            --primary-light: #2c4a7c;
            --primary-dark: #0e1a30;
            --accent: #f5b042;
            --accent-light: #f8c86a;
            --accent-dark: #d4922a;
            --bg-body: #f4f7fb;
            --bg-card: #ffffff;
            --bg-dark: #0e1a30;
            --bg-soft: #e8edf5;
            --text-main: #1e2a3a;
            --text-light: #5a6a7a;
            --text-white: #f0f4fa;
            --border-light: #dce1e8;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10);
            --space-xs: 0.5rem;
            --space-sm: 1rem;
            --space-md: 2rem;
            --space-lg: 3.5rem;
            --space-xl: 5rem;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.25s ease;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: 1rem;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--space-sm);
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
            backdrop-filter: blur(6px);
            background: rgba(255, 255, 255, 0.96);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--space-sm);
            height: 68px;
            gap: var(--space-sm);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .logo .logo-icon {
            color: var(--accent);
            font-size: 1.5rem;
        }
        .logo:hover {
            color: var(--primary-light);
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            flex-wrap: wrap;
        }
        .nav-main li a {
            display: block;
            padding: 0.5rem 1rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
        }
        .nav-main li a:hover,
        .nav-main li a:focus {
            background: var(--bg-soft);
            color: var(--primary);
        }
        .nav-main li a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-soft);
            border-radius: 40px;
            padding: 0.3rem 0.3rem 0.3rem 1rem;
            border: 1px solid transparent;
            transition: border var(--transition), box-shadow var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(245, 176, 66, 0.2);
        }
        .search-box input {
            background: transparent;
            padding: 0.4rem 0.5rem;
            font-size: 0.9rem;
            color: var(--text-main);
            min-width: 100px;
            width: 140px;
        }
        .search-box input::placeholder {
            color: var(--text-light);
        }
        .search-box button {
            background: var(--primary);
            color: #fff;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
        }
        .search-box button:hover {
            background: var(--primary-light);
            transform: scale(1.05);
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 0.5rem 1.2rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 2px 10px rgba(245, 176, 66, 0.3);
            white-space: nowrap;
        }
        .btn-cta:hover,
        .btn-cta:focus {
            background: var(--accent-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 176, 66, 0.35);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            cursor: pointer;
            padding: 6px;
            border-radius: var(--radius-sm);
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
            transition: transform var(--transition), opacity var(--transition);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            background: var(--primary-dark);
            min-height: 260px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            overflow: hidden;
            padding: var(--space-xl) var(--space-sm);
        }
        .page-banner .banner-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.25;
            pointer-events: none;
        }
        .page-banner .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 30, 48, 0.85) 0%, rgba(26, 42, 74, 0.70) 100%);
            pointer-events: none;
        }
        .page-banner .banner-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .page-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 1px;
            margin-bottom: 0.75rem;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
        }
        .page-banner p {
            font-size: 1.15rem;
            color: var(--text-white);
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.8;
        }
        .page-banner .banner-badge {
            display: inline-block;
            background: var(--accent);
            color: var(--primary-dark);
            padding: 0.3rem 1rem;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 1rem;
            text-transform: uppercase;
        }

        /* ===== Section Shared ===== */
        .section-block {
            padding: var(--space-xl) 0;
        }
        .section-block.alt-bg {
            background: var(--bg-soft);
        }
        .section-block.dark-bg {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.5rem;
            letter-spacing: 0.5px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 640px;
            margin-bottom: var(--space-md);
        }
        .dark-bg .section-title {
            color: #fff;
        }
        .dark-bg .section-subtitle {
            color: rgba(240, 244, 250, 0.8);
        }

        .text-center {
            text-align: center;
        }
        .mx-auto {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: var(--space-md);
            margin-top: var(--space-sm);
        }
        .card-grid.cols-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .card-grid.cols-2 {
            grid-template-columns: repeat(2, 1fr);
        }

        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            display: flex;
            flex-direction: column;
        }
        .guide-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }
        .guide-card .card-img {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--bg-soft);
        }
        .guide-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .guide-card:hover .card-img img {
            transform: scale(1.05);
        }
        .guide-card .card-body {
            padding: var(--space-sm) var(--space-md) var(--space-md);
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .guide-card .card-tag {
            display: inline-block;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.15rem 0.8rem;
            border-radius: 40px;
            margin-bottom: 0.5rem;
            align-self: flex-start;
        }
        .guide-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.4rem;
        }
        .guide-card p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.6;
            flex: 1;
        }
        .guide-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: var(--space-sm);
            padding-top: var(--space-sm);
            border-top: 1px solid var(--border-light);
            font-size: 0.82rem;
            color: var(--text-light);
        }
        .guide-card .card-meta i {
            margin-right: 0.3rem;
        }

        /* ===== Featured / Large Card ===== */
        .featured-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--space-md);
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: box-shadow var(--transition);
        }
        .featured-card:hover {
            box-shadow: var(--shadow-lg);
        }
        .featured-card .fc-img {
            min-height: 300px;
            background: var(--bg-soft);
            overflow: hidden;
        }
        .featured-card .fc-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .featured-card:hover .fc-img img {
            transform: scale(1.03);
        }
        .featured-card .fc-body {
            padding: var(--space-md) var(--space-lg);
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .featured-card .fc-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.75rem;
        }
        .featured-card .fc-body p {
            font-size: 0.98rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: var(--space-sm);
        }
        .featured-card .fc-body .btn-outline {
            align-self: flex-start;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            border: 2px solid var(--primary);
            color: var(--primary);
            padding: 0.5rem 1.4rem;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .btn-outline:hover,
        .btn-outline:focus {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        /* ===== List / Step ===== */
        .step-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: var(--space-md);
            margin-top: var(--space-sm);
        }
        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: var(--space-md);
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-item .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 1.2rem;
            border-radius: 50%;
            margin-bottom: var(--space-sm);
        }
        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.4rem;
        }
        .step-item p {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: var(--space-sm) auto 0;
            display: flex;
            flex-direction: column;
            gap: var(--space-sm);
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: var(--space-sm) var(--space-md);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-item summary {
            font-weight: 600;
            font-size: 1.02rem;
            color: var(--primary);
            cursor: pointer;
            padding: 0.5rem 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--space-sm);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.8rem;
            color: var(--text-light);
            transition: transform var(--transition);
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0.5rem 0 1rem;
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.7;
            border-top: 1px solid var(--border-light);
            margin-top: 0.5rem;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            border-radius: var(--radius-lg);
            padding: var(--space-lg) var(--space-md);
            text-align: center;
            color: #fff;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .cta-block h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
            position: relative;
            z-index: 1;
        }
        .cta-block p {
            font-size: 1.05rem;
            opacity: 0.9;
            max-width: 560px;
            margin: 0 auto var(--space-md);
            position: relative;
            z-index: 1;
        }
        .cta-block .btn-cta {
            font-size: 1.05rem;
            padding: 0.7rem 2rem;
            background: #fff;
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
        }
        .cta-block .btn-cta:hover {
            background: var(--accent-light);
            color: var(--primary-dark);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: var(--text-white);
            padding: var(--space-lg) 0 var(--space-md);
            margin-top: var(--space-xl);
        }
        .footer-inner {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: var(--space-sm);
            text-align: center;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
        }
        .footer-brand .logo-icon {
            color: var(--accent);
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.25rem 1.2rem;
        }
        .footer-links a {
            color: rgba(240, 244, 250, 0.7);
            font-size: 0.92rem;
            padding: 0.3rem 0;
            transition: color var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-copy {
            font-size: 0.85rem;
            color: rgba(240, 244, 250, 0.5);
            margin-top: var(--space-sm);
        }
        .footer-copy a {
            color: rgba(240, 244, 250, 0.7);
        }
        .footer-copy a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid.cols-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .featured-card {
                grid-template-columns: 1fr;
            }
            .featured-card .fc-img {
                min-height: 240px;
            }
            .page-banner h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-main {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--bg-card);
                flex-direction: column;
                padding: var(--space-sm);
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                z-index: 99;
            }
            .nav-main.open {
                display: flex;
            }
            .nav-main li a {
                padding: 0.7rem 1rem;
                font-size: 1rem;
                width: 100%;
            }
            .hamburger {
                display: flex;
            }
            .header-actions .search-box {
                display: none;
            }
            .header-actions .btn-cta {
                font-size: 0.8rem;
                padding: 0.4rem 0.9rem;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .card-grid.cols-2,
            .card-grid.cols-3 {
                grid-template-columns: 1fr;
            }
            .step-list {
                grid-template-columns: 1fr 1fr;
            }
            .featured-card .fc-body {
                padding: var(--space-sm) var(--space-md);
            }
            .cta-block h2 {
                font-size: 1.5rem;
            }
            .footer-links {
                gap: 0.25rem 0.8rem;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                height: 58px;
                gap: 0.4rem;
            }
            .logo {
                font-size: 1.05rem;
            }
            .logo .logo-icon {
                font-size: 1.2rem;
            }
            .header-actions .btn-cta {
                font-size: 0.7rem;
                padding: 0.3rem 0.7rem;
            }
            .page-banner {
                min-height: 200px;
                padding: var(--space-lg) var(--space-sm);
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .step-list {
                grid-template-columns: 1fr;
            }
            .section-block {
                padding: var(--space-lg) 0;
            }
            .footer-brand {
                font-size: 1.1rem;
            }
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a4a;
            --primary-light: #2c4a7a;
            --primary-dark: #0f1a30;
            --accent: #e8c84a;
            --accent-light: #f0d86a;
            --accent-dark: #c8a830;
            --bg-dark: #0a0f1a;
            --bg-section: #f0f4fa;
            --bg-card: #ffffff;
            --bg-footer: #0a0f1a;
            --text-light: #ffffff;
            --text-dark: #1a2a3a;
            --text-muted: #6a7a8a;
            --text-body: #2a3a4a;
            --border-light: rgba(255, 255, 255, 0.15);
            --border-card: #e0e6ee;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 28px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-body: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

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

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

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(10, 15, 26, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: var(--transition);
        }

        .site-header .header-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-light);
            letter-spacing: 0.5px;
            white-space: nowrap;
            transition: var(--transition);
        }
        .logo:hover {
            color: var(--accent);
        }
        .logo .logo-icon {
            color: var(--accent);
            font-size: 1.4rem;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
        }
        .nav-main li {
            margin: 0;
        }
        .nav-main li a {
            display: block;
            padding: 8px 16px;
            font-size: 0.95rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-main li a:hover {
            color: var(--text-light);
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-main li a.active {
            color: var(--accent);
            background: rgba(232, 200, 74, 0.12);
        }
        .nav-main li a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

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

        .search-box {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 40px;
            padding: 0 8px 0 16px;
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .search-box:focus-within {
            background: rgba(255, 255, 255, 0.14);
            border-color: var(--accent);
        }
        .search-box input {
            background: transparent;
            border: none;
            padding: 8px 0;
            color: var(--text-light);
            font-size: 0.9rem;
            min-width: 140px;
            outline: none;
        }
        .search-box input::placeholder {
            color: rgba(255, 255, 255, 0.45);
        }
        .search-box button {
            background: transparent;
            border: none;
            color: rgba(255, 255, 255, 0.6);
            padding: 8px 10px;
            cursor: pointer;
            transition: var(--transition);
            border-radius: 50%;
            font-size: 0.95rem;
        }
        .search-box button:hover {
            color: var(--accent);
        }
        .search-box button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--primary-dark);
            font-weight: 600;
            padding: 10px 22px;
            border-radius: 40px;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            font-size: 0.9rem;
            white-space: nowrap;
            box-shadow: 0 4px 16px rgba(232, 200, 74, 0.30);
        }
        .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(232, 200, 74, 0.40);
            color: var(--primary-dark);
        }
        .btn-cta:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 40px;
            height: 40px;
            background: transparent;
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            cursor: pointer;
            gap: 5px;
            padding: 8px;
            transition: var(--transition);
        }
        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-light);
            border-radius: 2px;
            transition: var(--transition);
        }
        .hamburger:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .hamburger:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* Mobile Nav */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            width: 100%;
            background: rgba(10, 15, 26, 0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 20px 24px 32px;
            border-bottom: 1px solid var(--border-light);
            z-index: 999;
            flex-direction: column;
            gap: 12px;
        }
        .mobile-nav.open {
            display: flex;
        }
        .mobile-nav a {
            display: block;
            padding: 12px 16px;
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.05rem;
            font-weight: 500;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .mobile-nav a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--accent);
        }
        .mobile-nav a.active {
            color: var(--accent);
            background: rgba(232, 200, 74, 0.10);
        }

        /* ===== Banner ===== */
        .page-banner {
            padding: 140px 0 72px;
            background: var(--bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            position: relative;
            text-align: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 15, 26, 0.82) 0%, rgba(26, 42, 74, 0.70) 100%);
            z-index: 1;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .page-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-light);
            margin: 0 0 16px;
            letter-spacing: 1px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.30);
        }
        .page-banner p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto 24px;
            line-height: 1.8;
        }
        .page-banner .banner-tags {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
        }
        .page-banner .banner-tags span {
            display: inline-block;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            color: var(--text-light);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        /* ===== Section Shared ===== */
        .section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin: 0 0 12px;
            letter-spacing: 0.5px;
        }
        .section-title p {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 640px;
            margin: 0 auto;
        }

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

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

        .review-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-card);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .review-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }
        .review-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }
        .review-card .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .review-card .card-body .badge {
            display: inline-block;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 40px;
            margin-bottom: 10px;
            align-self: flex-start;
            letter-spacing: 0.3px;
        }
        .review-card .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin: 0 0 8px;
            line-height: 1.4;
        }
        .review-card .card-body p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
            flex: 1;
            margin: 0 0 16px;
        }
        .review-card .card-body .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-card);
            padding-top: 14px;
        }
        .review-card .card-body .card-meta .rating {
            color: var(--accent-dark);
            font-weight: 600;
        }
        .review-card .card-body .card-meta .rating i {
            color: var(--accent);
            margin-right: 4px;
        }

        /* ===== Featured Large Card ===== */
        .featured-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-card);
            transition: var(--transition);
            align-items: center;
        }
        .featured-card:hover {
            box-shadow: var(--shadow-lg);
        }
        .featured-card .featured-img {
            width: 100%;
            height: 100%;
            min-height: 320px;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }
        .featured-card .featured-body {
            padding: 40px 48px 40px 0;
        }
        .featured-card .featured-body .badge-lg {
            display: inline-block;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--primary-dark);
            font-size: 0.8rem;
            font-weight: 700;
            padding: 6px 20px;
            border-radius: 40px;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .featured-card .featured-body h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-dark);
            margin: 0 0 12px;
            line-height: 1.3;
        }
        .featured-card .featured-body p {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.7;
            margin: 0 0 20px;
        }
        .featured-card .featured-body .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border: 2px solid var(--primary-light);
            color: var(--primary-light);
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            background: transparent;
        }
        .featured-card .featured-body .btn-outline:hover {
            background: var(--primary-light);
            color: var(--text-light);
            transform: translateY(-2px);
        }

        /* ===== Comparison Table ===== */
        .comparison-wrap {
            overflow-x: auto;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-card);
            background: var(--bg-card);
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.95rem;
            min-width: 640px;
        }
        .comparison-table thead {
            background: var(--primary);
            color: var(--text-light);
        }
        .comparison-table thead th {
            padding: 16px 20px;
            text-align: left;
            font-weight: 600;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .comparison-table tbody td {
            padding: 14px 20px;
            border-bottom: 1px solid var(--border-card);
            color: var(--text-body);
        }
        .comparison-table tbody tr:last-child td {
            border-bottom: none;
        }
        .comparison-table tbody tr:hover {
            background: rgba(232, 200, 74, 0.05);
        }
        .comparison-table .tag-best {
            display: inline-block;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 0.7rem;
            font-weight: 700;
            padding: 2px 12px;
            border-radius: 40px;
            letter-spacing: 0.3px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-card);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--accent);
        }
        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            list-style: none;
            font-size: 1rem;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-item .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-muted);
            line-height: 1.8;
            font-size: 0.95rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark) url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            position: relative;
            padding: 80px 0;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 15, 26, 0.80), rgba(26, 42, 74, 0.75));
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-light);
            margin: 0 0 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--accent), var(--accent-dark));
            color: var(--primary-dark);
            font-weight: 700;
            padding: 14px 36px;
            border-radius: 50px;
            font-size: 1.05rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 6px 24px rgba(232, 200, 74, 0.35);
        }
        .cta-section .btn-cta-large:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(232, 200, 74, 0.45);
            color: var(--primary-dark);
        }
        .cta-section .btn-cta-large:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-footer);
            padding: 48px 0 40px;
            border-top: 1px solid var(--border-light);
        }
        .site-footer .footer-inner {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
            text-align: center;
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-light);
            letter-spacing: 0.5px;
        }
        .site-footer .footer-brand .logo-icon {
            color: var(--accent);
            font-size: 1.3rem;
        }
        .site-footer .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 8px 24px;
            margin: 4px 0;
        }
        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            font-weight: 400;
            transition: var(--transition);
        }
        .site-footer .footer-links a:hover {
            color: var(--accent);
        }
        .site-footer .footer-copy {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.85rem;
            margin-top: 8px;
        }
        .site-footer .footer-copy a {
            color: rgba(255, 255, 255, 0.5);
        }
        .site-footer .footer-copy a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .featured-card {
                grid-template-columns: 1fr;
            }
            .featured-card .featured-body {
                padding: 24px 28px 32px;
            }
            .featured-card .featured-img {
                min-height: 240px;
                max-height: 320px;
            }
            .page-banner h1 {
                font-size: 2.2rem;
            }
        }

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

            .nav-main {
                display: none;
            }
            .search-box {
                display: none;
            }
            .header-actions .btn-cta {
                display: none;
            }
            .hamburger {
                display: flex;
            }

            .page-banner {
                padding: 110px 0 52px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 1rem;
            }

            .section {
                padding: 52px 0;
            }
            .section-title h2 {
                font-size: 1.6rem;
            }

            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .featured-card .featured-body h3 {
                font-size: 1.3rem;
            }

            .comparison-table {
                font-size: 0.85rem;
                min-width: 500px;
            }
            .comparison-table thead th,
            .comparison-table tbody td {
                padding: 12px 14px;
            }

            .cta-section h2 {
                font-size: 1.6rem;
            }

            .site-footer .footer-links {
                gap: 6px 16px;
            }
        }

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

            .page-banner h1 {
                font-size: 1.5rem;
            }
            .page-banner p {
                font-size: 0.95rem;
            }
            .page-banner .banner-tags span {
                font-size: 0.75rem;
                padding: 4px 14px;
            }

            .section-title h2 {
                font-size: 1.35rem;
            }

            .featured-card .featured-body {
                padding: 18px 20px 24px;
            }
            .featured-card .featured-body h3 {
                font-size: 1.1rem;
            }

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

            .cta-section {
                padding: 52px 0;
            }
            .cta-section h2 {
                font-size: 1.35rem;
            }
            .cta-section .btn-cta-large {
                padding: 12px 28px;
                font-size: 0.95rem;
            }

            .site-footer {
                padding: 32px 0 28px;
            }
            .site-footer .footer-brand {
                font-size: 1rem;
            }
        }

        /* ===== Accessibility & Reduced Motion ===== */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition-duration: 0.01ms !important;
                animation-duration: 0.01ms !important;
            }
            html {
                scroll-behavior: auto;
            }
        }

        /* ===== Foundation Overrides ===== */
        .grid-container {
            max-width: var(--container-max);
        }
        .cell {
            margin: 0;
        }
        .button {
            transition: var(--transition);
        }
        .button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0B0E1A;
            --primary-light: #1B2A4A;
            --secondary: #FF6B35;
            --secondary-light: #FF8A5C;
            --accent: #FFD93D;
            --accent-dim: #C9A800;
            --bg-dark: #050810;
            --bg-card: #11162B;
            --bg-card-hover: #1A2244;
            --text-main: #E8E8F0;
            --text-secondary: #A0A8C0;
            --text-muted: #6A7290;
            --border-color: #2A3460;
            --radius-sm: 8px;
            --radius-md: 16px;
            --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, 0.6);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
        }

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

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 标题通用 ===== */
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            text-align: center;
            margin-bottom: 0.6rem;
            background: linear-gradient(135deg, #FFD93D, #FF6B35);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-sub {
            text-align: center;
            color: var(--text-secondary);
            font-size: 1.1rem;
            max-width: 680px;
            margin: 0 auto 3rem;
        }
        @media (max-width: 640px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-sub {
                font-size: 0.95rem;
                margin-bottom: 2rem;
            }
        }

        /* ===== Header / Nav (SaaS 命令栏风格) ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(5, 8, 16, 0.85);
            backdrop-filter: blur(20px) saturate(1.4);
            border-bottom: 1px solid rgba(42, 52, 96, 0.5);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(5, 8, 16, 0.95);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.6);
        }
        .header-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-main) !important;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0B0E1A;
            font-size: 1.1rem;
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-main li a {
            display: block;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }
        .nav-main li a:hover,
        .nav-main li a:focus-visible {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-main li a.active {
            color: var(--accent);
            background: rgba(255, 217, 61, 0.08);
        }
        .nav-main li a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background: var(--accent);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 40px;
            padding: 0 6px 0 16px;
            transition: var(--transition);
            width: 200px;
        }
        .search-box:focus-within {
            border-color: var(--accent-dim);
            background: rgba(255, 255, 255, 0.1);
            box-shadow: 0 0 0 3px rgba(255, 217, 61, 0.15);
        }
        .search-box input {
            background: transparent;
            color: var(--text-main);
            padding: 8px 0;
            font-size: 0.85rem;
            width: 100%;
            border: none;
        }
        .search-box input::placeholder {
            color: var(--text-muted);
        }
        .search-box button {
            background: transparent;
            color: var(--text-muted);
            padding: 8px 12px;
            cursor: pointer;
            border-radius: 50%;
            transition: var(--transition);
        }
        .search-box button:hover {
            color: var(--accent);
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 40px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: #0B0E1A !important;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }
        .btn-cta:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 30px rgba(255, 107, 53, 0.35);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            border: none;
            cursor: pointer;
            padding: 6px;
            border-radius: 6px;
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            border-radius: 2px;
            background: var(--text-main);
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* 移动端导航抽屉 */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(5, 8, 16, 0.95);
            backdrop-filter: blur(16px);
            z-index: 999;
            padding: 32px 24px;
            overflow-y: auto;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .mobile-nav-overlay.open {
            display: block;
            opacity: 1;
        }
        .mobile-nav-overlay ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .mobile-nav-overlay ul li a {
            display: block;
            padding: 14px 20px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 1.1rem;
            font-weight: 500;
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .mobile-nav-overlay ul li a:hover {
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-main);
        }
        .mobile-nav-overlay ul li a.active {
            color: var(--accent);
            border-color: rgba(255, 217, 61, 0.2);
            background: rgba(255, 217, 61, 0.05);
        }

        @media (max-width: 1024px) {
            .nav-main {
                display: none;
            }
            .search-box {
                width: 140px;
            }
            .hamburger {
                display: flex;
            }
            .header-actions .btn-cta {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .search-box {
                width: 100px;
            }
            .search-box input {
                font-size: 0.75rem;
            }
            .logo {
                font-size: 1.05rem;
            }
            .logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
        }

        /* ===== Hero / Banner ===== */
        .page-banner {
            position: relative;
            padding: 120px 0 80px;
            margin-top: var(--nav-height);
            min-height: 420px;
            display: flex;
            align-items: center;
            background: var(--bg-dark);
            overflow: hidden;
        }
        .page-banner .bg-layer {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
        }
        .page-banner .bg-layer::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(5, 8, 16, 0.85) 30%, rgba(11, 14, 26, 0.6) 70%, transparent 100%);
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 3rem;
            font-weight: 800;
            margin-bottom: 0.8rem;
            background: linear-gradient(135deg, #FFD93D, #FF8A5C, #FF6B35);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .page-banner p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 2rem;
        }
        .page-banner .banner-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .page-banner .banner-actions .btn-primary {
            padding: 14px 36px;
            border-radius: 40px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: #0B0E1A !important;
            font-weight: 700;
            font-size: 1rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .page-banner .banner-actions .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(255, 107, 53, 0.4);
        }
        .page-banner .banner-actions .btn-outline {
            padding: 13px 32px;
            border-radius: 40px;
            border: 2px solid rgba(255, 217, 61, 0.3);
            color: var(--accent) !important;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .page-banner .banner-actions .btn-outline:hover {
            border-color: var(--accent);
            background: rgba(255, 217, 61, 0.08);
            transform: translateY(-3px);
        }
        @media (max-width: 768px) {
            .page-banner {
                padding: 100px 0 60px;
                min-height: 320px;
            }
            .page-banner h1 {
                font-size: 2rem;
            }
            .page-banner p {
                font-size: 0.95rem;
            }
        }
        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 1.6rem;
            }
            .page-banner .banner-actions .btn-primary,
            .page-banner .banner-actions .btn-outline {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
        }

        /* ===== 通用板块间距 ===== */
        .section-block {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section-block {
                padding: 50px 0;
            }
        }

        /* ===== 教程分级卡片 ===== */
        .tier-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .tier-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 36px 28px 32px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .tier-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--secondary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .tier-card:hover::before {
            opacity: 1;
        }
        .tier-card:hover {
            transform: translateY(-6px);
            border-color: rgba(255, 217, 61, 0.2);
            box-shadow: var(--shadow-md);
            background: var(--bg-card-hover);
        }
        .tier-card .tier-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            margin: 0 auto 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            background: rgba(255, 107, 53, 0.12);
            color: var(--secondary);
        }
        .tier-card .tier-icon.gold {
            background: rgba(255, 217, 61, 0.12);
            color: var(--accent);
        }
        .tier-card .tier-icon.silver {
            background: rgba(160, 168, 192, 0.12);
            color: var(--text-secondary);
        }
        .tier-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }
        .tier-card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .tier-card .tier-tag {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 40px;
            background: rgba(255, 217, 61, 0.08);
            color: var(--accent);
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid rgba(255, 217, 61, 0.15);
        }
        @media (max-width: 960px) {
            .tier-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 600px) {
            .tier-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .tier-card {
                padding: 28px 20px 24px;
            }
        }

        /* ===== 热门教程列表（卡片） ===== */
        .tutorial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .tutorial-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .tutorial-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(255, 217, 61, 0.15);
        }
        .tutorial-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            background: var(--primary-light);
        }
        .tutorial-card .card-body {
            padding: 22px 20px 24px;
        }
        .tutorial-card .card-body .card-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 40px;
            background: rgba(255, 107, 53, 0.12);
            color: var(--secondary);
            font-size: 0.75rem;
            font-weight: 500;
            margin-bottom: 10px;
        }
        .tutorial-card .card-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-main);
            line-height: 1.4;
        }
        .tutorial-card .card-body p {
            color: var(--text-secondary);
            font-size: 0.85rem;
            line-height: 1.6;
            margin-bottom: 14px;
        }
        .tutorial-card .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .tutorial-card .card-body .card-meta i {
            margin-right: 4px;
        }
        @media (max-width: 960px) {
            .tutorial-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 600px) {
            .tutorial-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .tutorial-card .card-img {
                height: 160px;
            }
        }

        /* ===== 器材推荐 (图文列表) ===== */
        .gear-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .gear-item {
            display: flex;
            align-items: flex-start;
            gap: 18px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .gear-item:hover {
            border-color: rgba(255, 217, 61, 0.15);
            background: var(--bg-card-hover);
            transform: translateY(-3px);
        }
        .gear-item .gear-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(255, 107, 53, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--secondary);
        }
        .gear-item .gear-info h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text-main);
        }
        .gear-item .gear-info p {
            color: var(--text-secondary);
            font-size: 0.85rem;
            line-height: 1.5;
        }
        @media (max-width: 768px) {
            .gear-list {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .gear-item {
                padding: 16px 18px;
            }
        }

        /* ===== 技巧区块 (图文混合) ===== */
        .tip-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .tip-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
        }
        .tip-card:hover {
            border-color: rgba(255, 217, 61, 0.15);
            box-shadow: var(--shadow-sm);
            transform: translateY(-3px);
        }
        .tip-card .tip-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: rgba(255, 217, 61, 0.15);
            line-height: 1;
            margin-bottom: 6px;
        }
        .tip-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .tip-card p {
            color: var(--text-secondary);
            font-size: 0.88rem;
            line-height: 1.65;
        }
        @media (max-width: 640px) {
            .tip-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .tip-card {
                padding: 20px 18px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(255, 217, 61, 0.12);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-main);
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            gap: 12px;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--accent);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .faq-item.active .faq-question .faq-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: 0.9rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        @media (max-width: 640px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 0.85rem;
            }
            .faq-item.active .faq-answer {
                padding: 0 16px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary-light), var(--bg-card));
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            border: 1px solid rgba(255, 217, 61, 0.08);
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.06;
            z-index: 0;
        }
        .cta-block .cta-content {
            position: relative;
            z-index: 1;
        }
        .cta-block h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
            background: linear-gradient(135deg, #FFD93D, #FF6B35);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .cta-block p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-block .btn-cta-large {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            border-radius: 40px;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            color: #0B0E1A !important;
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .cta-block .btn-cta-large:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 14px 40px rgba(255, 107, 53, 0.4);
        }
        @media (max-width: 768px) {
            .cta-block {
                padding: 40px 24px;
            }
            .cta-block h2 {
                font-size: 1.5rem;
            }
            .cta-block p {
                font-size: 0.9rem;
            }
            .cta-block .btn-cta-large {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 36px;
            margin-top: 40px;
        }
        .footer-inner {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 24px;
            text-align: center;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-main);
        }
        .footer-brand .logo-icon {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0B0E1A;
            font-size: 0.9rem;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 8px 24px;
        }
        .footer-links a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-copy {
            color: var(--text-muted);
            font-size: 0.8rem;
        }
        .footer-copy a {
            color: var(--text-secondary);
        }
        .footer-copy a:hover {
            color: var(--accent);
        }
        @media (max-width: 520px) {
            .site-footer {
                padding: 32px 0 24px;
            }
            .footer-links {
                gap: 6px 16px;
            }
            .footer-links a {
                font-size: 0.8rem;
            }
        }

        /* ===== 基础 Foundation 覆写 ===== */
        .grid-container {
            max-width: var(--container-max);
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .grid-container {
                padding: 0 16px;
            }
        }

        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }

        /* ===== focus-visible 可访问性 ===== */
        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }