/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #DC2626;
            --color-primary-dark: #B91C1C;
            --color-primary-light: #FEE2E2;
            --color-primary-gradient: linear-gradient(135deg, #DC2626 0%, #991B1B 100%);
            --color-secondary: #F59E0B;
            --color-secondary-light: #FEF3C7;
            --color-dark: #0F172A;
            --color-dark-2: #1E293B;
            --color-dark-3: #334155;
            --color-bg: #FFFFFF;
            --color-bg-alt: #F8FAFC;
            --color-bg-dark: #0F172A;
            --color-text: #1E293B;
            --color-text-light: #64748B;
            --color-text-lighter: #94A3B8;
            --color-text-white: #FFFFFF;
            --color-border: #E2E8F0;
            --color-border-light: #F1F5F9;
            --color-success: #10B981;
            --color-warning: #F59E0B;
            --color-error: #EF4444;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
            --h1-size: clamp(2rem, 5vw, 3.5rem);
            --h2-size: clamp(1.5rem, 3.5vw, 2.25rem);
            --h3-size: clamp(1.125rem, 2vw, 1.5rem);
            --h4-size: clamp(1rem, 1.5vw, 1.25rem);
            --body-size: 1rem;
            --small-size: 0.875rem;
            --xs-size: 0.75rem;
            --space-xs: 0.25rem;
            --space-sm: 0.5rem;
            --space-md: 1rem;
            --space-lg: 1.5rem;
            --space-xl: 2rem;
            --space-2xl: 3rem;
            --space-3xl: 4rem;
            --space-4xl: 6rem;
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --radius-full: 9999px;
            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
            --shadow-color: 0 4px 14px rgba(220, 38, 38, 0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-fast: all 0.15s ease;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: var(--body-size);
            line-height: 1.6;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-fast);
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
            font-size: inherit;
            transition: var(--transition);
        }
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 0.75rem 1rem;
            outline: none;
            transition: var(--transition);
            width: 100%;
        }
        input:focus,
        textarea:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.12);
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--color-dark);
        }
        p {
            margin-bottom: 1rem;
        }
        p:last-child {
            margin-bottom: 0;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--space-xl);
        }
        .container-narrow {
            max-width: 880px;
            margin: 0 auto;
            padding: 0 var(--space-xl);
        }
        .container-wide {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 var(--space-xl);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: var(--space-4xl) 0;
        }
        .section-alt {
            background: var(--color-bg-alt);
        }
        .section-dark {
            background: var(--color-bg-dark);
            color: var(--color-text-white);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark h4 {
            color: var(--color-text-white);
        }
        .section-header {
            text-align: center;
            margin-bottom: var(--space-3xl);
        }
        .section-header h2 {
            font-size: var(--h2-size);
            margin-bottom: var(--space-md);
            position: relative;
            display: inline-block;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--color-primary);
            border-radius: var(--radius-full);
            margin: var(--space-md) auto 0;
        }
        .section-header p {
            color: var(--color-text-light);
            font-size: var(--body-size);
            max-width: 600px;
            margin: var(--space-md) auto 0;
        }
        .section-dark .section-header p {
            color: var(--color-text-lighter);
        }
        .section-dark .section-header h2::after {
            background: var(--color-secondary);
        }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 23, 42, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            height: var(--header-height);
            transition: var(--transition);
        }
        .header.scrolled {
            background: rgba(15, 23, 42, 0.98);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--space-xl);
        }
        .logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--color-text-white);
            display: flex;
            align-items: center;
            gap: var(--space-sm);
            letter-spacing: 0.5px;
        }
        .logo i {
            color: var(--color-primary);
            font-size: 1.6rem;
        }
        .logo span {
            background: var(--color-primary);
            padding: 0.15rem 0.5rem;
            border-radius: var(--radius-sm);
            font-size: 0.75rem;
            font-weight: 600;
            margin-left: 0.25rem;
            vertical-align: middle;
        }
        .nav {
            display: flex;
            align-items: center;
            gap: var(--space-xl);
        }
        .nav a {
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 0.25rem 0;
            position: relative;
            transition: var(--transition);
        }
        .nav a:hover {
            color: var(--color-text-white);
        }
        .nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-primary);
            transition: var(--transition);
            border-radius: var(--radius-full);
        }
        .nav a:hover::after,
        .nav a.active::after {
            width: 100%;
        }
        .nav a.active {
            color: var(--color-text-white);
        }
        .nav-cta {
            background: var(--color-primary);
            color: var(--color-text-white) !important;
            padding: 0.6rem 1.5rem !important;
            border-radius: var(--radius-full);
            font-weight: 600 !important;
            transition: var(--transition);
            box-shadow: var(--shadow-color);
        }
        .nav-cta:hover {
            background: var(--color-primary-dark) !important;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(220, 38, 38, 0.35);
        }
        .nav-cta::after {
            display: none !important;
        }
        .nav-cta i {
            margin-right: 0.35rem;
        }

        /* 移动端菜单 */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 4px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .menu-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--color-text-white);
            border-radius: 2px;
            transition: var(--transition);
        }
        .menu-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .menu-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background: var(--color-dark);
            overflow: hidden;
            padding-top: var(--header-height);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            transform: scale(1.05);
            transition: transform 8s ease;
        }
        .hero:hover .hero-bg {
            transform: scale(1);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(15, 23, 42, 0.6) 50%, rgba(220, 38, 38, 0.25) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
            padding: var(--space-4xl) var(--space-xl);
            color: var(--color-text-white);
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: var(--space-sm);
            background: rgba(220, 38, 38, 0.2);
            border: 1px solid rgba(220, 38, 38, 0.4);
            padding: 0.4rem 1.2rem;
            border-radius: var(--radius-full);
            font-size: var(--xs-size);
            font-weight: 500;
            color: var(--color-primary-light);
            margin-bottom: var(--space-lg);
            letter-spacing: 0.5px;
        }
        .hero-badge i {
            color: var(--color-secondary);
        }
        .hero h1 {
            font-size: var(--h1-size);
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: var(--space-lg);
            color: var(--color-text-white);
        }
        .hero h1 span {
            color: var(--color-primary);
            position: relative;
        }
        .hero h1 span::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 0;
            right: 0;
            height: 8px;
            background: rgba(220, 38, 38, 0.25);
            border-radius: var(--radius-full);
        }
        .hero p {
            font-size: clamp(1rem, 2vw, 1.2rem);
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin-bottom: var(--space-2xl);
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            gap: var(--space-md);
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.85rem 2rem;
            border-radius: var(--radius-full);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary {
            background: var(--color-primary);
            color: var(--color-text-white);
            box-shadow: var(--shadow-color);
        }
        .btn-primary:hover {
            background: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(220, 38, 38, 0.4);
        }
        .btn-secondary {
            background: rgba(255, 255, 255, 0.1);
            color: var(--color-text-white);
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(4px);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.18);
            transform: translateY(-2px);
            border-color: rgba(255, 255, 255, 0.3);
        }
        .btn-lg {
            padding: 1rem 2.5rem;
            font-size: 1.1rem;
        }
        .btn-sm {
            padding: 0.5rem 1.2rem;
            font-size: 0.85rem;
        }
        .btn-outline {
            background: transparent;
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
        }
        .btn-outline:hover {
            background: var(--color-primary);
            color: var(--color-text-white);
        }
        .hero-stats {
            display: flex;
            gap: var(--space-2xl);
            margin-top: var(--space-2xl);
            padding-top: var(--space-2xl);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .num {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--color-secondary);
        }
        .hero-stat .label {
            font-size: var(--xs-size);
            color: rgba(255, 255, 255, 0.6);
            margin-top: 0.2rem;
        }

        /* ===== 特色卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-xl);
        }
        .feature-card {
            background: var(--color-bg);
            border-radius: var(--radius-lg);
            padding: var(--space-2xl);
            text-align: center;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--color-border-light);
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-xl);
            border-color: var(--color-border);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            background: var(--color-primary-light);
            border-radius: var(--radius-lg);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--space-lg);
            font-size: 1.5rem;
            color: var(--color-primary);
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: var(--color-primary);
            color: var(--color-text-white);
            transform: scale(1.05);
        }
        .feature-card h3 {
            font-size: var(--h4-size);
            margin-bottom: var(--space-sm);
        }
        .feature-card p {
            color: var(--color-text-light);
            font-size: var(--small-size);
            line-height: 1.7;
        }

        /* ===== 分类卡片 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--space-xl);
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--color-bg);
            box-shadow: var(--shadow-md);
            border: 1px solid var(--color-border-light);
            transition: var(--transition);
            cursor: pointer;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-xl);
        }
        .category-card .thumb {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            transition: var(--transition);
        }
        .category-card:hover .thumb {
            transform: scale(1.05);
        }
        .category-card .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(15, 23, 42, 0.7) 0%, transparent 60%);
        }
        .category-card .info {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: var(--space-lg);
            color: var(--color-text-white);
        }
        .category-card .info h3 {
            color: var(--color-text-white);
            font-size: var(--h4-size);
            margin-bottom: 0.25rem;
        }
        .category-card .info p {
            font-size: var(--xs-size);
            opacity: 0.8;
        }
        .category-card .tag {
            position: absolute;
            top: var(--space-md);
            right: var(--space-md);
            background: var(--color-primary);
            color: var(--color-text-white);
            padding: 0.25rem 0.75rem;
            border-radius: var(--radius-full);
            font-size: var(--xs-size);
            font-weight: 600;
            z-index: 2;
        }

        /* ===== 内容列表 ===== */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--space-xl);
        }
        .content-card {
            display: flex;
            gap: var(--space-lg);
            background: var(--color-bg);
            border-radius: var(--radius-lg);
            padding: var(--space-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: var(--transition);
        }
        .content-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: var(--color-border);
        }
        .content-card .thumb-wrap {
            flex-shrink: 0;
            width: 180px;
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .content-card .thumb-wrap img {
            width: 100%;
            height: 120px;
            object-fit: cover;
            transition: var(--transition);
        }
        .content-card:hover .thumb-wrap img {
            transform: scale(1.05);
        }
        .content-card .body {
            flex: 1;
            min-width: 0;
        }
        .content-card .body .meta {
            display: flex;
            align-items: center;
            gap: var(--space-md);
            font-size: var(--xs-size);
            color: var(--color-text-light);
            margin-bottom: var(--space-sm);
        }
        .content-card .body .meta .cat {
            background: var(--color-primary-light);
            color: var(--color-primary);
            padding: 0.15rem 0.6rem;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: var(--xs-size);
        }
        .content-card .body h3 {
            font-size: 1.1rem;
            margin-bottom: var(--space-sm);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .content-card .body h3 a {
            color: var(--color-dark);
        }
        .content-card .body h3 a:hover {
            color: var(--color-primary);
        }
        .content-card .body p {
            font-size: var(--small-size);
            color: var(--color-text-light);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .content-card .body .read-more {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            color: var(--color-primary);
            font-weight: 600;
            font-size: var(--small-size);
            margin-top: var(--space-sm);
        }
        .content-card .body .read-more:hover {
            gap: 0.5rem;
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--space-xl);
        }
        .stat-card {
            text-align: center;
            padding: var(--space-2xl) var(--space-lg);
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-4px);
        }
        .stat-card .num {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--color-secondary);
            line-height: 1;
            margin-bottom: var(--space-sm);
        }
        .stat-card .num span {
            font-size: 1.2rem;
        }
        .stat-card .label {
            font-size: var(--small-size);
            color: rgba(255, 255, 255, 0.7);
        }
        .stat-card i {
            font-size: 2rem;
            color: rgba(220, 38, 38, 0.6);
            margin-bottom: var(--space-md);
        }

        /* ===== 流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-2xl);
        }
        .step-card {
            text-align: center;
            position: relative;
        }
        .step-card:not(:last-child)::after {
            content: '→';
            position: absolute;
            right: -1.5rem;
            top: 2rem;
            font-size: 1.5rem;
            color: var(--color-primary);
            font-weight: 700;
            opacity: 0.5;
        }
        .step-num {
            width: 56px;
            height: 56px;
            background: var(--color-primary);
            color: var(--color-text-white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            font-weight: 800;
            margin: 0 auto var(--space-lg);
            box-shadow: 0 4px 14px rgba(220, 38, 38, 0.3);
        }
        .step-card h3 {
            font-size: var(--h4-size);
            margin-bottom: var(--space-sm);
        }
        .step-card p {
            color: var(--color-text-light);
            font-size: var(--small-size);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--space-md);
        }
        .faq-item {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--color-border);
        }
        .faq-item.active {
            border-color: var(--color-primary);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: var(--space-lg) var(--space-xl);
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            color: var(--color-dark);
            gap: var(--space-md);
        }
        .faq-question i {
            color: var(--color-primary);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 var(--space-xl) var(--space-lg);
        }
        .faq-answer p {
            color: var(--color-text-light);
            font-size: var(--small-size);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-primary-gradient);
            padding: var(--space-4xl) 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            color: var(--color-text-white);
            font-size: var(--h2-size);
            margin-bottom: var(--space-md);
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto var(--space-xl);
            font-size: 1.05rem;
        }
        .cta-section .btn {
            background: var(--color-text-white);
            color: var(--color-primary);
            font-weight: 700;
        }
        .cta-section .btn:hover {
            background: var(--color-secondary);
            color: var(--color-dark);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--color-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: var(--space-3xl) 0 var(--space-xl);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--space-2xl);
            margin-bottom: var(--space-2xl);
        }
        .footer-brand .logo {
            margin-bottom: var(--space-md);
        }
        .footer-brand p {
            font-size: var(--small-size);
            color: rgba(255, 255, 255, 0.5);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer h4 {
            color: var(--color-text-white);
            font-size: 1rem;
            margin-bottom: var(--space-lg);
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: var(--space-sm);
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.55);
            font-size: var(--small-size);
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--color-text-white);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: var(--space-lg);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--space-md);
            font-size: var(--xs-size);
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a:hover {
            color: var(--color-text-white);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid .step-card:nth-child(2)::after {
                display: none;
            }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
                --space-4xl: 3.5rem;
                --space-3xl: 2.5rem;
            }
            .header-inner {
                padding: 0 var(--space-lg);
            }
            .nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(15, 23, 42, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: var(--space-lg) var(--space-xl);
                gap: var(--space-md);
                transform: translateY(-110%);
                transition: var(--transition);
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                align-items: stretch;
            }
            .nav.open {
                transform: translateY(0);
            }
            .nav a {
                padding: var(--space-sm) 0;
                font-size: 1rem;
            }
            .nav-cta {
                text-align: center;
                padding: 0.75rem 1.5rem !important;
            }
            .menu-toggle {
                display: flex;
            }
            .hero {
                min-height: 85vh;
            }
            .hero-content {
                padding: var(--space-2xl) var(--space-lg);
            }
            .hero-stats {
                gap: var(--space-lg);
                flex-wrap: wrap;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .content-grid {
                grid-template-columns: 1fr;
            }
            .content-card {
                flex-direction: column;
            }
            .content-card .thumb-wrap {
                width: 100%;
            }
            .content-card .thumb-wrap img {
                height: 180px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--space-md);
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .step-card:not(:last-child)::after {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section {
                padding: var(--space-3xl) 0;
            }
            .container {
                padding: 0 var(--space-lg);
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 1.75rem;
            }
            .hero p {
                font-size: 0.95rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--space-sm);
            }
            .stat-card {
                padding: var(--space-lg) var(--space-md);
            }
            .stat-card .num {
                font-size: 1.8rem;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .btn-lg {
                padding: 0.75rem 1.5rem;
                font-size: 1rem;
            }
            .faq-question {
                padding: var(--space-md) var(--space-lg);
                font-size: 0.95rem;
            }
            .faq-item.active .faq-answer {
                padding: 0 var(--space-lg) var(--space-md);
            }
        }

        /* ===== 空状态 ===== */
        .empty-state {
            text-align: center;
            padding: var(--space-3xl) var(--space-xl);
            color: var(--color-text-light);
        }
        .empty-state i {
            font-size: 3rem;
            color: var(--color-border);
            margin-bottom: var(--space-md);
        }
        .empty-state p {
            font-size: 1rem;
        }

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

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e74c3c;
            --primary-dark: #c0392b;
            --primary-light: #fadbd8;
            --primary-gradient: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
            --secondary: #2c3e50;
            --secondary-light: #34495e;
            --accent: #f39c12;
            --accent-light: #fef3e2;
            --bg: #f8f9fa;
            --bg-white: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-card: #ffffff;
            --text: #2d3436;
            --text-light: #636e72;
            --text-white: #ffffff;
            --text-muted: #b2bec3;
            --border: #e9ecef;
            --border-light: #f1f3f5;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 12px 40px rgba(231, 76, 60, 0.15);
            --shadow-card: 0 2px 16px rgba(0, 0, 0, 0.06);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --header-h: 72px;
            --spacing-section: 80px;
            --spacing-block: 48px;
        }

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

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

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.1rem;
        }

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

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            height: var(--header-h);
            transition: background var(--transition);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--secondary);
            text-decoration: none;
            white-space: nowrap;
        }
        .logo i {
            color: var(--primary);
            font-size: 1.5rem;
        }
        .logo span {
            color: var(--primary);
            font-weight: 600;
            font-size: 0.8rem;
            background: var(--primary-light);
            padding: 2px 8px;
            border-radius: 20px;
            margin-left: 4px;
        }
        .logo:hover {
            color: var(--secondary);
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }
        .nav a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav a.active {
            color: var(--text-white);
            background: var(--primary-gradient);
            box-shadow: 0 4px 12px rgba(231, 76, 60, 0.35);
        }
        .nav a.active:hover {
            color: var(--text-white);
            background: var(--primary-gradient);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(231, 76, 60, 0.4);
        }
        .nav .nav-cta {
            background: var(--primary-gradient);
            color: var(--text-white) !important;
            padding: 10px 24px;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(231, 76, 60, 0.3);
            border-radius: 50px;
        }
        .nav .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(231, 76, 60, 0.4);
            background: var(--primary-gradient);
            color: var(--text-white) !important;
        }
        .nav .nav-cta i {
            font-size: 0.85rem;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--secondary);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            padding: 140px 0 60px;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.25;
            filter: brightness(0.4);
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.92) 0%, rgba(231, 76, 60, 0.3) 100%);
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            color: var(--text-white);
            font-size: 2.8rem;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .page-banner h1 i {
            color: var(--accent);
            margin-right: 12px;
        }
        .page-banner p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.15rem;
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .page-banner .banner-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-top: 24px;
        }
        .page-banner .banner-tags span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            color: var(--text-white);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .page-banner .banner-tags span i {
            color: var(--accent);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 16px 0;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb .container {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-light);
        }
        .breadcrumb a {
            color: var(--text-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb i {
            font-size: 0.7rem;
            color: var(--text-muted);
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* ===== Section Common ===== */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2rem;
            color: var(--secondary);
            margin-bottom: 12px;
        }
        .section-title h2 i {
            color: var(--primary);
            margin-right: 10px;
        }
        .section-title p {
            color: var(--text-light);
            max-width: 560px;
            margin: 0 auto;
            font-size: 1.05rem;
        }
        .section-title .title-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.82rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        /* ===== Category Cards ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .category-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            border: 1px solid var(--border);
            text-decoration: none;
            color: inherit;
            display: block;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
            color: inherit;
        }
        .category-card .card-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .category-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .category-card:hover .card-img img {
            transform: scale(1.08);
        }
        .category-card .card-img .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary-gradient);
            color: var(--text-white);
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(231, 76, 60, 0.3);
        }
        .category-card .card-body {
            padding: 20px 22px 24px;
        }
        .category-card .card-body h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--secondary);
        }
        .category-card .card-body h3 i {
            color: var(--primary);
            margin-right: 6px;
            font-size: 0.95rem;
        }
        .category-card .card-body p {
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.6;
            margin-bottom: 14px;
        }
        .category-card .card-body .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .category-card .card-body .card-meta i {
            margin-right: 4px;
        }
        .category-card .card-body .card-meta .badge {
            background: var(--accent-light);
            color: var(--accent);
            padding: 2px 12px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.75rem;
        }

        /* ===== Guide Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: all var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-gradient);
            color: var(--text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            margin: 0 auto 16px;
            box-shadow: 0 4px 12px rgba(231, 76, 60, 0.25);
        }
        .step-card h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            color: var(--secondary);
        }
        .step-card p {
            color: var(--text-light);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== Live Matches ===== */
        .match-list {
            display: grid;
            gap: 16px;
        }
        .match-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            padding: 18px 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: all var(--transition);
            flex-wrap: wrap;
            gap: 12px;
        }
        .match-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-hover);
            transform: translateX(4px);
        }
        .match-item .match-info {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .match-item .match-info .match-badge {
            background: var(--primary-light);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
        }
        .match-item .match-info .match-badge.live {
            background: #e74c3c;
            color: #fff;
            animation: pulse-dot 1.8s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.6;
            }
        }
        .match-item .match-info .match-name {
            font-weight: 600;
            font-size: 1rem;
            color: var(--secondary);
        }
        .match-item .match-info .match-league {
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .match-item .match-time {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .match-item .match-time i {
            color: var(--primary);
        }
        .match-item .match-action {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-gradient);
            color: var(--text-white);
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            transition: all var(--transition);
            text-decoration: none;
        }
        .match-item .match-action:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(231, 76, 60, 0.35);
            color: var(--text-white);
        }

        /* ===== FAQ ===== */
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: grid;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item .faq-q {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            color: var(--secondary);
            font-size: 1rem;
            gap: 12px;
            user-select: none;
        }
        .faq-item .faq-q i {
            color: var(--primary);
            transition: transform var(--transition);
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .faq-item.active .faq-q i {
            transform: rotate(180deg);
        }
        .faq-item .faq-a {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.35s ease;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-a {
            padding: 0 24px 20px;
            max-height: 400px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
            padding: 72px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.15;
            filter: brightness(0.3);
        }
        .cta-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.93) 0%, rgba(231, 76, 60, 0.25) 100%);
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            color: var(--text-white);
            font-size: 2rem;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-section .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.05rem;
            transition: all var(--transition);
            text-decoration: none;
        }
        .cta-btn.primary {
            background: var(--primary-gradient);
            color: var(--text-white);
            box-shadow: 0 6px 24px rgba(231, 76, 60, 0.35);
        }
        .cta-btn.primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 36px rgba(231, 76, 60, 0.45);
            color: var(--text-white);
        }
        .cta-btn.outline {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255, 255, 255, 0.3);
        }
        .cta-btn.outline:hover {
            border-color: var(--primary);
            background: rgba(231, 76, 60, 0.15);
            transform: translateY(-3px);
            color: var(--text-white);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer .footer-brand .logo {
            color: var(--text-white);
            font-size: 1.3rem;
            margin-bottom: 14px;
            display: inline-flex;
        }
        .footer .footer-brand .logo span {
            background: rgba(231, 76, 60, 0.2);
            color: var(--primary-light);
        }
        .footer .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 360px;
        }
        .footer h4 {
            color: var(--text-white);
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer .footer-links a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.88rem;
            transition: all var(--transition);
            text-decoration: none;
        }
        .footer .footer-links a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            text-decoration: none;
        }
        .footer .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .page-banner h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 56px;
                --header-h: 64px;
            }

            .nav {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s ease;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
                max-height: calc(100vh - var(--header-h));
                overflow-y: auto;
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav a {
                width: 100%;
                justify-content: center;
                padding: 12px 18px;
                font-size: 1rem;
            }
            .nav .nav-cta {
                margin-top: 8px;
            }
            .nav-toggle {
                display: flex;
            }

            .page-banner {
                padding: 110px 0 44px;
                min-height: 240px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 0.95rem;
            }
            .page-banner .banner-tags span {
                font-size: 0.78rem;
                padding: 4px 12px;
            }

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

            .category-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .category-card .card-img {
                height: 140px;
            }
            .category-card .card-body {
                padding: 16px 18px 20px;
            }
            .category-card .card-body h3 {
                font-size: 1rem;
            }

            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .step-card {
                padding: 24px 16px;
            }

            .match-item {
                padding: 14px 18px;
                flex-direction: column;
                align-items: flex-start;
            }
            .match-item .match-info {
                width: 100%;
            }
            .match-item .match-action {
                width: 100%;
                justify-content: center;
            }

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

            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-btn {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
        }

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

            .page-banner h1 {
                font-size: 1.5rem;
            }
            .page-banner p {
                font-size: 0.88rem;
            }

            .category-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .category-card .card-img {
                height: 180px;
            }

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

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

            .faq-item .faq-q {
                padding: 14px 16px;
                font-size: 0.92rem;
            }
            .faq-item .faq-a {
                font-size: 0.88rem;
            }

            .cta-section h2 {
                font-size: 1.35rem;
            }
            .cta-section p {
                font-size: 0.92rem;
            }
            .cta-btn {
                padding: 10px 24px;
                font-size: 0.88rem;
            }

            .footer {
                padding: 36px 0 24px;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--text-muted);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-light);
        }

        /* ===== Selection ===== */
        ::selection {
            background: var(--primary);
            color: var(--text-white);
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .gap-16 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .badge-pill {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #e74c3c;
            --primary-dark: #c0392b;
            --primary-light: #f1948a;
            --secondary: #2c3e50;
            --secondary-light: #34495e;
            --accent: #f39c12;
            --accent-dark: #e67e22;
            --bg: #f5f6fa;
            --bg-white: #ffffff;
            --bg-dark: #1a1a2e;
            --text: #2d3436;
            --text-light: #636e72;
            --text-white: #f8f9fa;
            --border: #dfe6e9;
            --border-light: #f0f0f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 8px 30px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --shadow-hover: 0 12px 36px rgba(231,76,60,0.15);
            --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container: 1200px;
            --spacing: 80px;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: var(--font); font-size: 1rem; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--secondary); }
        .container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
        .section { padding: var(--spacing) 0; }
        .section-title {
            font-size: 2rem;
            text-align: center;
            margin-bottom: 12px;
            position: relative;
        }
        .section-sub {
            text-align: center;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto 48px;
            font-size: 1.05rem;
        }
        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 0 auto 16px;
        }

        /* ===== Header & Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(26, 26, 46, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            transition: var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.5px;
        }
        .logo i { color: var(--primary); font-size: 1.5rem; }
        .logo span { color: var(--accent); font-weight: 600; font-size: 0.75rem; background: rgba(243,156,18,0.2); padding: 2px 10px; border-radius: 20px; margin-left: 4px; }
        .logo:hover { color: var(--text-white); }
        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            color: rgba(255,255,255,0.75);
            font-size: 0.92rem;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .nav a:hover { color: #fff; background: rgba(255,255,255,0.08); }
        .nav a.active { color: #fff; background: rgba(231,76,60,0.2); }
        .nav a.active::after { content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%); width: 20px; height: 3px; background: var(--primary); border-radius: 4px; }
        .nav-cta {
            background: var(--primary) !important;
            color: #fff !important;
            padding: 10px 24px !important;
            border-radius: var(--radius-sm) !important;
            font-weight: 600 !important;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 16px rgba(231,76,60,0.3);
        }
        .nav-cta:hover { background: var(--primary-dark) !important; transform: translateY(-1px); box-shadow: 0 6px 24px rgba(231,76,60,0.4); }
        .nav-toggle { display: none; color: #fff; font-size: 1.5rem; background: none; border: none; cursor: pointer; padding: 8px; }

        /* ===== Hero / Banner ===== */
        .article-hero {
            padding: 140px 0 60px;
            background: linear-gradient(135deg, rgba(26,26,46,0.92) 0%, rgba(44,62,80,0.88) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .article-hero .container { position: relative; z-index: 2; width: 100%; }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            color: rgba(255,255,255,0.6);
            font-size: 0.85rem;
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a { color: rgba(255,255,255,0.7); }
        .article-breadcrumb a:hover { color: #fff; }
        .article-breadcrumb i { font-size: 0.7rem; }
        .article-hero h1 {
            font-size: 2.4rem;
            color: #fff;
            max-width: 800px;
            line-height: 1.3;
            margin-bottom: 16px;
            text-shadow: 0 2px 12px rgba(0,0,0,0.2);
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            color: rgba(255,255,255,0.75);
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .article-meta i { margin-right: 6px; color: var(--primary-light); }
        .article-meta .tag {
            background: rgba(231,76,60,0.25);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            color: #fff;
            border: 1px solid rgba(231,76,60,0.3);
        }

        /* ===== Main Content ===== */
        .article-main { padding: 60px 0; }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }
        .article-body {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 40px 44px;
            box-shadow: var(--shadow);
        }
        .article-body h2 {
            font-size: 1.6rem;
            margin: 36px 0 16px;
            color: var(--secondary);
        }
        .article-body h3 {
            font-size: 1.2rem;
            margin: 28px 0 12px;
            color: var(--secondary);
        }
        .article-body p {
            margin-bottom: 18px;
            color: var(--text);
            line-height: 1.8;
        }
        .article-body ul, .article-body ol {
            margin: 16px 0 24px 20px;
        }
        .article-body li {
            margin-bottom: 10px;
            color: var(--text);
            line-height: 1.7;
            list-style: disc;
        }
        .article-body img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow);
        }
        .article-body .content-img-wrap {
            position: relative;
            margin: 24px 0;
            border-radius: var(--radius-sm);
            overflow: hidden;
        }
        .article-body .content-img-wrap img { margin: 0; }
        .article-body .content-img-caption {
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-light);
            padding: 8px 0 0;
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 24px;
            margin: 24px 0;
            background: #fdf2f2;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .article-share span { font-weight: 600; color: var(--secondary); font-size: 0.9rem; }
        .article-share a {
            width: 40px; height: 40px;
            display: flex; align-items: center; justify-content: center;
            border-radius: 50%;
            background: var(--bg);
            color: var(--text-light);
            transition: var(--transition);
            font-size: 1rem;
        }
        .article-share a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .article-not-found i { font-size: 4rem; color: var(--text-light); margin-bottom: 20px; }
        .article-not-found h2 { font-size: 1.8rem; margin-bottom: 12px; }
        .article-not-found p { color: var(--text-light); margin-bottom: 24px; }
        .article-not-found a { display: inline-block; padding: 12px 32px; background: var(--primary); color: #fff; border-radius: var(--radius-sm); font-weight: 600; }
        .article-not-found a:hover { background: var(--primary-dark); }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 28px;
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .sidebar-list a:last-child { border-bottom: none; }
        .sidebar-list a:hover { padding-left: 8px; }
        .sidebar-list .list-num {
            width: 28px; height: 28px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            font-size: 0.8rem; font-weight: 700; flex-shrink: 0;
        }
        .sidebar-list .list-num.second { background: var(--accent); }
        .sidebar-list .list-num.third { background: var(--secondary); }
        .sidebar-list .list-text { flex: 1; }
        .sidebar-list .list-text strong { display: block; font-size: 0.92rem; color: var(--secondary); margin-bottom: 2px; }
        .sidebar-list .list-text span { font-size: 0.8rem; color: var(--text-light); }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: var(--radius);
            padding: 28px;
            text-align: center;
        }
        .sidebar-cta h4 { color: #fff; font-size: 1.1rem; margin-bottom: 8px; }
        .sidebar-cta p { font-size: 0.9rem; opacity: 0.9; margin-bottom: 16px; }
        .sidebar-cta .btn {
            background: #fff;
            color: var(--primary);
            padding: 10px 28px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            display: inline-block;
        }
        .sidebar-cta .btn:hover { background: var(--accent); color: #fff; }

        /* ===== Features Section ===== */
        .features-section {
            background: var(--bg-white);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            text-align: center;
            padding: 36px 24px;
            border-radius: var(--radius);
            background: var(--bg);
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--primary-light); }
        .feature-card .icon {
            width: 64px; height: 64px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.6rem;
            color: #fff;
        }
        .feature-card h4 { font-size: 1.1rem; margin-bottom: 8px; }
        .feature-card p { font-size: 0.9rem; color: var(--text-light); }

        /* ===== Steps Section ===== */
        .steps-section { background: var(--bg); }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step-counter;
        }
        .step-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 32px 20px;
            text-align: center;
            box-shadow: var(--shadow);
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .step-card .step-num {
            width: 48px; height: 48px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            font-size: 1.2rem; font-weight: 800;
            margin: 0 auto 16px;
        }
        .step-card h4 { font-size: 1rem; margin-bottom: 8px; }
        .step-card p { font-size: 0.88rem; color: var(--text-light); }
        .step-card::after {
            content: '';
            position: absolute;
            top: 40px; right: -12px;
            width: 24px; height: 24px;
            background: var(--primary-light);
            clip-path: polygon(0 0, 100% 50%, 0 100%);
            opacity: 0.3;
        }
        .step-card:last-child::after { display: none; }

        /* ===== FAQ Section ===== */
        .faq-section { background: var(--bg-white); }
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            color: var(--secondary);
            cursor: pointer;
            background: var(--bg);
            transition: var(--transition);
            font-size: 1rem;
        }
        .faq-question i { transition: var(--transition); color: var(--primary); font-size: 0.9rem; }
        .faq-item.active .faq-question { background: var(--primary); color: #fff; }
        .faq-item.active .faq-question i { transform: rotate(180deg); color: #fff; }
        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
        }
        .faq-item.active .faq-answer {
            padding: 18px 24px;
            max-height: 400px;
        }
        .faq-answer p { color: var(--text-light); font-size: 0.95rem; line-height: 1.7; }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--secondary) 0%, #1a1a2e 100%), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            background-blend-mode: overlay;
            padding: 80px 0;
            text-align: center;
        }
        .cta-section h2 { color: #fff; font-size: 2rem; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.8); max-width: 600px; margin: 0 auto 28px; font-size: 1.05rem; }
        .cta-buttons { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            box-shadow: 0 4px 20px rgba(231,76,60,0.3);
            transition: var(--transition);
        }
        .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 32px rgba(231,76,60,0.4); color: #fff; }
        .btn-outline {
            background: transparent;
            color: #fff;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            border: 2px solid rgba(255,255,255,0.3);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: var(--transition);
        }
        .btn-outline:hover { border-color: var(--primary); background: var(--primary); color: #fff; }

        /* ===== Related Section ===== */
        .related-section { background: var(--bg); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .related-card img { width: 100%; height: 180px; object-fit: cover; border-radius: 0; }
        .related-card .related-body { padding: 20px; }
        .related-card .related-body h4 { font-size: 1rem; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .related-card .related-body p { font-size: 0.88rem; color: var(--text-light); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 12px; }
        .related-card .related-meta { display: flex; justify-content: space-between; font-size: 0.8rem; color: var(--text-light); }
        .related-card .related-meta span i { margin-right: 4px; }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
        }
        .footer .container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .logo { margin-bottom: 16px; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 360px; color: rgba(255,255,255,0.6); }
        .footer h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; font-weight: 600; }
        .footer-links { display: flex; flex-direction: column; gap: 10px; }
        .footer-links a { color: rgba(255,255,255,0.6); font-size: 0.9rem; transition: var(--transition); }
        .footer-links a:hover { color: var(--primary); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--primary); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .article-hero h1 { font-size: 2rem; }
        }
        @media (max-width: 768px) {
            .nav { display: none; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0; background: rgba(26,26,46,0.98); padding: 16px 24px; border-bottom: 1px solid rgba(255,255,255,0.06); gap: 4px; }
            .nav.open { display: flex; }
            .nav a { padding: 12px 16px; }
            .nav-cta { justify-content: center; }
            .nav-toggle { display: block; }
            .article-hero { padding: 120px 0 40px; min-height: 240px; }
            .article-hero h1 { font-size: 1.6rem; }
            .article-body { padding: 24px 20px; }
            .features-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .step-card::after { display: none; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .section { padding: 48px 0; }
            .section-title { font-size: 1.5rem; }
            .cta-section h2 { font-size: 1.5rem; }
            .article-meta { gap: 12px; font-size: 0.82rem; }
        }
        @media (max-width: 520px) {
            .header .container { height: 64px; }
            .logo { font-size: 1.1rem; }
            .logo span { font-size: 0.65rem; padding: 1px 8px; }
            .article-hero h1 { font-size: 1.3rem; }
            .article-body { padding: 16px 14px; }
            .article-body h2 { font-size: 1.2rem; }
            .section-title { font-size: 1.3rem; }
            .btn-primary, .btn-outline { padding: 12px 24px; font-size: 0.9rem; }
            .sidebar-card { padding: 20px; }
        }