/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a4a;
            --primary-light: #2a3f6a;
            --primary-dark: #0f1a30;
            --accent: #e8a838;
            --accent-hover: #d49a2e;
            --accent-light: #f5d98a;
            --bg: #f8f9fc;
            --bg-card: #ffffff;
            --bg-dark: #0f1a30;
            --text: #1a1a2e;
            --text-light: #5a6a7a;
            --text-white: #f0f2f5;
            --border: #e2e6ef;
            --border-light: #f0f2f7;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(26, 42, 74, 0.08);
            --shadow-hover: 0 12px 40px rgba(26, 42, 74, 0.15);
            --shadow-lg: 0 20px 60px rgba(26, 42, 74, 0.12);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --header-height: 76px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::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: 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(--accent);
        }
        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-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 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--primary-dark);
        }

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

        .container-narrow {
            max-width: 860px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 分隔线 ===== */
        .section-divider {
            height: 1px;
            background: linear-gradient(to right, transparent, var(--border), transparent);
            margin: 0;
            border: none;
        }

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-height);
            transition: box-shadow var(--transition);
        }

        .header.scrolled {
            box-shadow: 0 2px 30px rgba(26, 42, 74, 0.08);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo i {
            color: var(--accent);
            font-size: 26px;
        }
        .logo:hover {
            color: var(--primary);
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-main a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .nav-main a i {
            font-size: 14px;
        }
        .nav-main a:hover {
            color: var(--primary);
            background: rgba(26, 42, 74, 0.05);
        }
        .nav-main a.active {
            color: var(--primary);
            background: rgba(26, 42, 74, 0.06);
            font-weight: 600;
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: 12px;
        }
        .nav-cta .btn {
            padding: 8px 22px;
            font-size: 14px;
        }

        .menu-toggle {
            display: none;
            font-size: 24px;
            color: var(--primary);
            padding: 8px;
            border-radius: var(--radius-sm);
            background: transparent;
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: rgba(26, 42, 74, 0.05);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
            cursor: pointer;
            text-align: center;
        }
        .btn i {
            font-size: 14px;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232, 168, 56, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(232, 168, 56, 0.25);
        }

        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255, 255, 255, 0.4);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.7);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }

        .btn-outline-dark {
            background: transparent;
            color: var(--primary);
            border-color: var(--border);
        }
        .btn-outline-dark:hover {
            border-color: var(--primary);
            background: rgba(26, 42, 74, 0.04);
            transform: translateY(-2px);
        }
        .btn-outline-dark:active {
            transform: translateY(0);
        }

        .btn-lg {
            padding: 16px 36px;
            font-size: 17px;
            border-radius: var(--radius);
        }
        .btn-lg i {
            font-size: 16px;
        }

        .btn-sm {
            padding: 6px 16px;
            font-size: 13px;
            border-radius: 6px;
        }

        /* ===== 标签 / 徽章 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            font-size: 12px;
            font-weight: 600;
            border-radius: 100px;
            background: rgba(232, 168, 56, 0.12);
            color: var(--accent-hover);
            letter-spacing: 0.3px;
        }
        .badge i {
            font-size: 10px;
        }
        .badge-primary {
            background: var(--primary);
            color: var(--text-white);
        }
        .badge-light {
            background: rgba(255, 255, 255, 0.15);
            color: var(--text-white);
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding: calc(var(--header-height) + 40px) 0 80px;
            background: var(--primary-dark);
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            transform: scale(1.05);
            transition: transform 0.6s ease;
        }
        .hero:hover .hero-bg {
            transform: scale(1);
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 26, 48, 0.88) 0%, rgba(26, 42, 74, 0.72) 60%, rgba(15, 26, 48, 0.88) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
            text-align: center;
            margin: 0 auto;
            padding: 0 24px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 20px;
            border-radius: 100px;
            background: rgba(232, 168, 56, 0.15);
            border: 1px solid rgba(232, 168, 56, 0.25);
            color: var(--accent-light);
            font-size: 13px;
            font-weight: 500;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 12px;
        }

        .hero h1 {
            font-size: 52px;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.15;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--accent), #f5d98a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.8;
            max-width: 580px;
            margin: 0 auto 36px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 50px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .num {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-white);
            display: block;
            line-height: 1.2;
        }
        .hero-stat .label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            font-weight: 400;
            margin-top: 4px;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-card);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }

        .section-header {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 52px;
        }
        .section-header h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary-dark);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .section-header p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.7;
        }
        .section-header .badge {
            margin-bottom: 12px;
        }
        .section-header .sub {
            font-size: 14px;
            color: var(--text-light);
            font-weight: 400;
            margin-top: 4px;
        }

        .section-dark .section-header h2 {
            color: var(--text-white);
        }
        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.6);
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            padding: 28px 24px;
            transition: all var(--transition);
            box-shadow: var(--shadow);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(232, 168, 56, 0.2);
        }

        .card-img {
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin: -28px -24px 20px;
            height: 200px;
            position: relative;
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card:hover .card-img img {
            transform: scale(1.05);
        }
        .card-img .badge {
            position: absolute;
            top: 12px;
            left: 12px;
        }

        .card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--primary-dark);
        }
        .card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }
        .card .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-light);
            margin-top: 12px;
        }
        .card .meta i {
            font-size: 12px;
            color: var(--accent);
        }

        .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px solid var(--border-light);
        }

        /* ===== 网格 ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        /* ===== 核心优势 ===== */
        .feature-card {
            text-align: center;
            padding: 36px 28px;
        }
        .feature-card .icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(232, 168, 56, 0.12), rgba(232, 168, 56, 0.04));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 28px;
            color: var(--accent);
            transition: all var(--transition);
        }
        .feature-card:hover .icon {
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
            color: var(--primary-dark);
            transform: scale(1.05);
        }
        .feature-card h3 {
            font-size: 20px;
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 14px;
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }

        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            height: 260px;
            display: flex;
            align-items: flex-end;
            padding: 24px;
            background: var(--primary-dark);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            cursor: pointer;
        }
        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.45;
            transition: transform 0.6s ease, opacity 0.4s ease;
        }
        .category-card:hover img {
            transform: scale(1.08);
            opacity: 0.55;
        }
        .category-card .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15, 26, 48, 0.92) 0%, rgba(15, 26, 48, 0.2) 60%, transparent 100%);
        }
        .category-card .content {
            position: relative;
            z-index: 2;
            color: var(--text-white);
        }
        .category-card .content h3 {
            color: var(--text-white);
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .category-card .content p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 13px;
        }
        .category-card .content .btn {
            margin-top: 12px;
        }

        /* ===== 资讯列表 ===== */
        .post-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }
        .post-card {
            display: flex;
            flex-direction: column;
        }
        .post-card .card-img {
            height: 180px;
        }
        .post-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .post-card .badge-cat {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 100px;
            background: rgba(232, 168, 56, 0.1);
            color: var(--accent-hover);
            font-size: 11px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .post-card h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card p {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card .meta {
            font-size: 12px;
            color: var(--text-light);
            margin-top: auto;
            padding-top: 12px;
        }

        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-light);
            font-size: 15px;
        }
        .empty-state i {
            font-size: 40px;
            color: var(--border);
            margin-bottom: 16px;
            display: block;
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: all var(--transition);
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(232, 168, 56, 0.2);
            transform: translateY(-2px);
        }
        .stat-card .num {
            font-size: 38px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            display: block;
        }
        .stat-card .label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 6px;
            font-weight: 400;
        }
        .stat-card i {
            font-size: 28px;
            color: rgba(232, 168, 56, 0.3);
            margin-bottom: 12px;
            display: block;
        }

        /* ===== 流程步骤 ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            padding: 32px 20px;
            position: relative;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-item .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent), var(--accent-hover));
            color: var(--primary-dark);
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-feature-settings: "tnum";
        }
        .step-item h3 {
            font-size: 18px;
            margin-bottom: 6px;
        }
        .step-item p {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.6;
        }
        .step-item .step-img {
            margin: -32px -20px 20px;
            border-radius: var(--radius) var(--radius) 0 0;
            overflow: hidden;
            height: 140px;
        }
        .step-item .step-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(232, 168, 56, 0.2);
        }
        .faq-item.active {
            border-color: var(--accent);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary-dark);
            cursor: pointer;
            transition: background var(--transition);
            gap: 12px;
        }
        .faq-question:hover {
            background: rgba(26, 42, 74, 0.02);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 14px;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 18px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
        }
        .cta-section .content {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.6);
            max-width: 520px;
            margin: 0 auto 28px;
        }
        .cta-section .btn {
            font-size: 17px;
            padding: 16px 40px;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.6);
            padding: 48px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .footer-brand .logo {
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .footer-brand .logo span {
            background: linear-gradient(135deg, var(--text-white), rgba(255, 255, 255, 0.8));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 13px;
            display: block;
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            max-width: var(--max-width);
            margin: 32px auto 0;
            padding: 20px 24px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.3);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
            }
            .hero h1 {
                font-size: 42px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 28px;
            }
            .section-header {
                margin-bottom: 36px;
            }

            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                pointer-events: none;
                gap: 4px;
                max-height: 80vh;
                overflow-y: auto;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-main a {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
                border-radius: var(--radius-sm);
            }
            .nav-main a.active::after {
                display: none;
            }
            .nav-main a.active {
                background: rgba(232, 168, 56, 0.1);
                color: var(--accent-hover);
            }
            .nav-cta {
                display: none;
            }
            .menu-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }

            .hero {
                min-height: 90vh;
                padding: calc(var(--header-height) + 24px) 0 48px;
            }
            .hero h1 {
                font-size: 32px;
            }
            .hero p {
                font-size: 15px;
            }
            .hero-stats {
                gap: 24px;
                flex-wrap: wrap;
                margin-top: 32px;
                padding-top: 24px;
            }
            .hero-stat .num {
                font-size: 24px;
            }

            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-card {
                padding: 20px 12px;
            }
            .stat-card .num {
                font-size: 28px;
            }

            .steps {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .cta-section {
                padding: 40px 24px;
                border-radius: var(--radius);
            }
            .cta-section h2 {
                font-size: 26px;
            }

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

            .post-list {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .category-card {
                height: 200px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero h1 {
                font-size: 26px;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .stat-card {
                padding: 16px 8px;
            }
            .stat-card .num {
                font-size: 22px;
            }
            .stat-card .label {
                font-size: 12px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .logo {
                font-size: 17px;
            }
            .logo i {
                font-size: 20px;
            }
            .btn-lg {
                padding: 12px 24px;
                font-size: 15px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 14px;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 13px;
            }
            .faq-item.active .faq-answer {
                padding: 0 16px 14px;
            }
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-12 {
            margin-top: 12px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-40 {
            margin-top: 40px;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .hidden {
            display: none !important;
        }
        .w-full {
            width: 100%;
        }
        .relative {
            position: relative;
        }

        /* 页面滚动渐入动画 */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: article */
:root {
  --clr-primary: #2563eb;
  --clr-primary-dark: #1e40af;
  --clr-primary-light: #3b82f6;
  --clr-accent: #f59e0b;
  --clr-accent-light: #fbbf24;
  --clr-bg: #f8fafc;
  --clr-surface: #ffffff;
  --clr-text: #1e293b;
  --clr-text-weak: #64748b;
  --clr-border: #e2e8f0;
  --clr-border-light: #f1f5f9;
  --clr-dark: #0f172a;
  --clr-success: #10b981;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.10), 0 4px 16px rgba(0,0,0,0.06);
  --shadow-xl: 0 24px 60px rgba(0,0,0,0.12);
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 80px;
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-sans);font-size:16px;line-height:1.7;color:var(--clr-text);background:var(--clr-bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
img{max-width:100%;height:auto;display:block}
a{color:var(--clr-primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--clr-primary-dark)}
a:focus-visible{outline:2px solid var(--clr-primary);outline-offset:2px;border-radius:4px}
button,input,textarea{font-family:inherit;font-size:inherit}
button{cursor:pointer;border:none;background:none}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{line-height:1.3;color:var(--clr-dark);font-weight:700}
h1{font-size:2.5rem;letter-spacing:-0.02em}
h2{font-size:2rem;letter-spacing:-0.01em}
h3{font-size:1.35rem}
h4{font-size:1.1rem}
p{margin-bottom:1em}
.container{max-width:1200px;margin:0 auto;padding:0 var(--space-lg)}
.section{padding:var(--space-3xl) 0}
.section-title{text-align:center;margin-bottom:var(--space-2xl)}
.section-title h2{position:relative;display:inline-block}
.section-title h2::after{content:'';display:block;width:60px;height:4px;background:var(--clr-accent);border-radius:2px;margin:var(--space-sm) auto 0}
.section-title p{margin-top:var(--space-sm);color:var(--clr-text-weak);max-width:600px;margin-left:auto;margin-right:auto}
/* ===== HEADER / NAV ===== */
.header{background:var(--clr-surface);border-bottom:1px solid var(--clr-border);position:sticky;top:0;z-index:100;box-shadow:var(--shadow-sm)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;max-width:1200px;margin:0 auto;padding:0 var(--space-lg)}
.logo{display:flex;align-items:center;gap:var(--space-sm);font-weight:700;font-size:1.3rem;color:var(--clr-dark);transition:opacity var(--transition)}
.logo i{color:var(--clr-primary);font-size:1.6rem}
.logo span{background:linear-gradient(135deg,var(--clr-primary),var(--clr-primary-dark));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.logo:hover{opacity:0.85;color:var(--clr-dark)}
.nav-main{display:flex;align-items:center;gap:var(--space-lg)}
.nav-main a{font-size:0.95rem;font-weight:500;color:var(--clr-text-weak);padding:var(--space-sm) var(--space-md);border-radius:var(--radius-sm);transition:all var(--transition);position:relative}
.nav-main a i{margin-right:6px;font-size:0.85rem}
.nav-main a:hover{color:var(--clr-primary);background:rgba(37,99,235,0.06)}
.nav-main a.active{color:var(--clr-primary);background:rgba(37,99,235,0.08)}
.nav-main a.active::after{content:'';position:absolute;bottom:-2px;left:50%;transform:translateX(-50%);width:60%;height:3px;background:var(--clr-primary);border-radius:2px}
.nav-cta{margin-left:var(--space-md)}
.btn{display:inline-flex;align-items:center;gap:var(--space-sm);padding:12px 28px;border-radius:var(--radius-md);font-weight:600;font-size:0.95rem;transition:all var(--transition);border:none;line-height:1.2}
.btn-primary{background:linear-gradient(135deg,var(--clr-primary),var(--clr-primary-dark));color:#fff;box-shadow:0 4px 14px rgba(37,99,235,0.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(37,99,235,0.35);color:#fff}
.btn-primary:active{transform:translateY(0)}
.btn-accent{background:linear-gradient(135deg,var(--clr-accent),#d97706);color:#fff;box-shadow:0 4px 14px rgba(245,158,11,0.3)}
.btn-accent:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(245,158,11,0.35);color:#fff}
.btn-outline{background:transparent;border:2px solid var(--clr-primary);color:var(--clr-primary)}
.btn-outline:hover{background:var(--clr-primary);color:#fff;transform:translateY(-2px)}
.btn-sm{padding:8px 18px;font-size:0.85rem}
.btn-lg{padding:16px 36px;font-size:1.05rem}
.menu-toggle{display:none;flex-direction:column;gap:5px;padding:8px;border-radius:var(--radius-sm);cursor:pointer;background:transparent;border:none}
.menu-toggle span{display:block;width:26px;height:3px;background:var(--clr-dark);border-radius:2px;transition:all var(--transition)}
/* ===== HERO BANNER ===== */
.hero-article{position:relative;padding:var(--space-4xl) 0 var(--space-3xl);background:linear-gradient(135deg, rgba(15,23,42,0.85), rgba(30,64,175,0.80)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;color:#fff;text-align:center;overflow:hidden}
.hero-article::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 30% 50%, rgba(37,99,235,0.25), transparent 70%)}
.hero-article .container{position:relative;z-index:2}
.hero-article .breadcrumb{display:flex;justify-content:center;align-items:center;gap:var(--space-sm);font-size:0.9rem;color:rgba(255,255,255,0.7);margin-bottom:var(--space-lg)}
.hero-article .breadcrumb a{color:rgba(255,255,255,0.8);transition:color var(--transition)}
.hero-article .breadcrumb a:hover{color:#fff}
.hero-article .breadcrumb span{color:rgba(255,255,255,0.5)}
.hero-article .post-category{display:inline-block;background:var(--clr-accent);color:var(--clr-dark);padding:4px 16px;border-radius:20px;font-size:0.8rem;font-weight:600;margin-bottom:var(--space-md);letter-spacing:0.02em}
.hero-article h1{font-size:2.8rem;color:#fff;max-width:850px;margin:0 auto var(--space-md);line-height:1.25;text-shadow:0 2px 20px rgba(0,0,0,0.2)}
.hero-article .post-meta{display:flex;justify-content:center;align-items:center;gap:var(--space-lg);color:rgba(255,255,255,0.75);font-size:0.9rem}
.hero-article .post-meta i{margin-right:6px}
.hero-article .post-excerpt{max-width:650px;margin:var(--space-lg) auto 0;color:rgba(255,255,255,0.85);font-size:1.05rem;line-height:1.7}
/* ===== ARTICLE CONTENT ===== */
.article-content{padding:var(--space-3xl) 0}
.article-content .content-body{max-width:800px;margin:0 auto;background:var(--clr-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:var(--space-2xl) var(--space-3xl)}
.article-content .content-body h2{font-size:1.6rem;margin:var(--space-xl) 0 var(--space-md);color:var(--clr-dark)}
.article-content .content-body h3{font-size:1.25rem;margin:var(--space-lg) 0 var(--space-sm);color:var(--clr-dark)}
.article-content .content-body p{color:var(--clr-text);line-height:1.85;margin-bottom:1.2em}
.article-content .content-body ul,.article-content .content-body ol{padding-left:1.5em;margin-bottom:1.2em;color:var(--clr-text)}
.article-content .content-body ul{list-style:disc}
.article-content .content-body ol{list-style:decimal}
.article-content .content-body li{margin-bottom:0.4em}
.article-content .content-body img{border-radius:var(--radius-md);margin:var(--space-lg) auto;box-shadow:var(--shadow-sm)}
.article-content .content-body blockquote{border-left:4px solid var(--clr-primary);padding:var(--space-md) var(--space-lg);background:rgba(37,99,235,0.04);border-radius:0 var(--radius-sm) var(--radius-sm) 0;margin:var(--space-lg) 0;color:var(--clr-text-weak);font-style:italic}
.article-content .content-body a{color:var(--clr-primary);text-decoration:underline;text-underline-offset:2px}
.article-content .content-body a:hover{color:var(--clr-primary-dark)}
.not-found{text-align:center;padding:var(--space-3xl) 0}
.not-found i{font-size:4rem;color:var(--clr-text-weak);margin-bottom:var(--space-lg)}
.not-found h2{font-size:2rem;color:var(--clr-dark)}
.not-found p{color:var(--clr-text-weak);margin:var(--space-md) 0 var(--space-lg)}
/* ===== ARTICLE INFO ===== */
.article-info{padding:0 0 var(--space-2xl)}
.article-info .info-inner{max-width:800px;margin:0 auto;display:flex;flex-wrap:wrap;gap:var(--space-lg);padding:var(--space-lg) var(--space-2xl);background:var(--clr-surface);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);border:1px solid var(--clr-border-light)}
.article-info .info-item{display:flex;align-items:center;gap:var(--space-sm);color:var(--clr-text-weak);font-size:0.9rem}
.article-info .info-item i{color:var(--clr-primary);width:18px;text-align:center}
.article-info .info-tags{display:flex;flex-wrap:wrap;gap:var(--space-sm);margin-left:auto}
.article-info .tag{display:inline-block;padding:4px 14px;border-radius:20px;font-size:0.8rem;font-weight:500;background:rgba(37,99,235,0.08);color:var(--clr-primary);border:1px solid rgba(37,99,235,0.12)}
/* ===== RELATED POSTS ===== */
.related-posts{background:var(--clr-surface);padding:var(--space-3xl) 0}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-lg)}
.related-card{background:var(--clr-bg);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm);transition:all var(--transition);border:1px solid var(--clr-border-light)}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.related-card .card-img{height:180px;background:var(--clr-border-light);overflow:hidden}
.related-card .card-img img{width:100%;height:100%;object-fit:cover;transition:transform 0.5s ease}
.related-card:hover .card-img img{transform:scale(1.05)}
.related-card .card-body{padding:var(--space-lg)}
.related-card .card-body h4{font-size:1.05rem;margin-bottom:var(--space-sm);color:var(--clr-dark)}
.related-card .card-body p{font-size:0.9rem;color:var(--clr-text-weak);margin-bottom:var(--space-md);line-height:1.6}
.related-card .card-body .card-meta{font-size:0.8rem;color:var(--clr-text-weak)}
.related-card .card-body .card-meta i{margin-right:4px}
/* ===== PLATFORM HIGHLIGHTS ===== */
.platform-highlights{background:linear-gradient(135deg, var(--clr-dark), #1e293b);color:#fff;padding:var(--space-3xl) 0}
.platform-highlights .section-title h2{color:#fff}
.platform-highlights .section-title h2::after{background:var(--clr-accent)}
.platform-highlights .section-title p{color:rgba(255,255,255,0.7)}
.highlights-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-xl)}
.highlight-card{background:rgba(255,255,255,0.06);border-radius:var(--radius-md);padding:var(--space-xl);text-align:center;backdrop-filter:blur(4px);border:1px solid rgba(255,255,255,0.08);transition:all var(--transition)}
.highlight-card:hover{background:rgba(255,255,255,0.10);transform:translateY(-4px)}
.highlight-card i{font-size:2.2rem;color:var(--clr-accent);margin-bottom:var(--space-md)}
.highlight-card h4{color:#fff;margin-bottom:var(--space-sm);font-size:1.1rem}
.highlight-card p{color:rgba(255,255,255,0.7);font-size:0.9rem;line-height:1.6;margin-bottom:0}
/* ===== FAQ ===== */
.faq{padding:var(--space-3xl) 0;background:var(--clr-bg)}
.faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:var(--space-md)}
.faq-item{background:var(--clr-surface);border-radius:var(--radius-md);padding:var(--space-lg) var(--space-xl);box-shadow:var(--shadow-sm);border:1px solid var(--clr-border-light);transition:all var(--transition)}
.faq-item:hover{box-shadow:var(--shadow-md)}
.faq-item h4{display:flex;align-items:center;gap:var(--space-sm);font-size:1rem;color:var(--clr-dark);margin-bottom:var(--space-sm)}
.faq-item h4 i{color:var(--clr-accent);font-size:1.1rem}
.faq-item p{color:var(--clr-text-weak);font-size:0.95rem;line-height:1.7;margin-bottom:0;padding-left:1.7em}
/* ===== CTA ===== */
.cta-section{background:linear-gradient(135deg, var(--clr-primary), var(--clr-primary-dark));padding:var(--space-3xl) 0;text-align:center;color:#fff;position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 70% 30%, rgba(255,255,255,0.08), transparent 60%)}
.cta-section .container{position:relative;z-index:2}
.cta-section h2{color:#fff;font-size:2.2rem;margin-bottom:var(--space-md)}
.cta-section p{color:rgba(255,255,255,0.85);max-width:600px;margin:0 auto var(--space-xl);font-size:1.05rem}
.cta-section .btn-accent{font-size:1.05rem;padding:14px 36px}
/* ===== FOOTER ===== */
.footer{background:var(--clr-dark);color:rgba(255,255,255,0.8);padding:var(--space-3xl) 0 0}
.footer-inner{max-width:1200px;margin:0 auto;padding:0 var(--space-lg);display:grid;grid-template-columns:2fr 1fr 1fr;gap:var(--space-2xl)}
.footer-brand .logo{color:#fff;font-size:1.2rem;margin-bottom:var(--space-md)}
.footer-brand .logo i{color:var(--clr-accent)}
.footer-brand .logo span{-webkit-text-fill-color:#fff;background:none}
.footer-brand p{font-size:0.9rem;color:rgba(255,255,255,0.6);line-height:1.7;max-width:360px}
.footer h4{color:#fff;font-size:1rem;margin-bottom:var(--space-lg);font-weight:600}
.footer a{display:block;color:rgba(255,255,255,0.6);font-size:0.9rem;padding:4px 0;transition:color var(--transition)}
.footer a:hover{color:var(--clr-accent)}
.footer-bottom{max-width:1200px;margin:var(--space-2xl) auto 0;padding:var(--space-lg);border-top:1px solid rgba(255,255,255,0.08);display:flex;justify-content:space-between;align-items:center;font-size:0.85rem;color:rgba(255,255,255,0.4)}
/* ===== RESPONSIVE ===== */
@media(max-width:1024px){
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .highlights-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr 1fr;gap:var(--space-xl)}
  .hero-article h1{font-size:2.2rem}
}
@media(max-width:768px){
  .menu-toggle{display:flex}
  .nav-main{position:fixed;top:68px;left:0;right:0;background:var(--clr-surface);flex-direction:column;padding:var(--space-lg);box-shadow:var(--shadow-lg);border-bottom:1px solid var(--clr-border);transform:translateY(-120%);opacity:0;pointer-events:none;transition:all 0.35s cubic-bezier(0.4,0,0.2,1);gap:var(--space-sm)}
  .nav-main.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .nav-main a{width:100%;padding:12px var(--space-md);font-size:1rem}
  .nav-cta{margin-left:0;margin-top:var(--space-sm);width:100%}
  .nav-cta .btn{width:100%;justify-content:center}
  .hero-article{padding:var(--space-2xl) 0}
  .hero-article h1{font-size:1.8rem}
  .hero-article .post-meta{flex-wrap:wrap;gap:var(--space-sm)}
  .article-content .content-body{padding:var(--space-lg)}
  .related-grid{grid-template-columns:1fr}
  .highlights-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr;text-align:center}
  .footer-brand p{max-width:100%}
  .footer-bottom{flex-direction:column;gap:var(--space-sm);text-align:center}
  .article-info .info-inner{flex-direction:column;align-items:flex-start;padding:var(--space-lg)}
  .article-info .info-tags{margin-left:0}
  .section{padding:var(--space-2xl) 0}
  h1{font-size:1.8rem}
  h2{font-size:1.5rem}
  .cta-section h2{font-size:1.6rem}
}
@media(max-width:520px){
  .header-inner{padding:0 var(--space-md);height:60px}
  .logo{font-size:1.1rem}
  .logo i{font-size:1.3rem}
  .hero-article h1{font-size:1.5rem}
  .hero-article .post-excerpt{font-size:0.95rem}
  .article-content .content-body{padding:var(--space-md);border-radius:var(--radius-md)}
  .container{padding:0 var(--space-md)}
  .btn-lg{padding:12px 24px;font-size:0.95rem}
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8a;
            --primary-dark: #0f1f33;
            --secondary: #e8872a;
            --secondary-light: #f0a44e;
            --accent: #3b9bdb;
            --bg-body: #f4f7fb;
            --bg-card: #ffffff;
            --bg-dark: #0f1a2b;
            --text-primary: #141c2b;
            --text-secondary: #4a5568;
            --text-weak: #8896a8;
            --text-light: #f0f4fa;
            --border: #e2e8f0;
            --border-light: #f0f2f5;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.07);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.09);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: all 0.25s ease;
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --container-max: 1200px;
            --header-height: 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-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            min-height: 100vh;
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, select, textarea { font-family: inherit; font-size: 1rem; outline: none; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 1.8rem; margin-bottom: 0.5rem; }
        h3 { font-size: 1.3rem; }
        p { margin-bottom: 0.5rem; color: var(--text-secondary); }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section { padding: 72px 0; }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0; left: 0; right: 0;
            height: var(--header-height);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            z-index: 1000;
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }
        .logo i { font-size: 1.6rem; color: var(--secondary); }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .nav-main a {
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.92rem;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-main a i { margin-right: 6px; font-size: 0.85rem; }
        .nav-main a:hover { color: var(--primary); background: rgba(26,58,92,0.06); }
        .nav-main a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 12px rgba(26,58,92,0.25);
        }
        .nav-main a.active:hover { color: #fff; background: var(--primary-light); }
        .nav-cta { margin-left: 8px; }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.92rem;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
        }
        .btn-primary:hover { background: var(--secondary-light); border-color: var(--secondary-light); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(232,135,42,0.3); }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .btn-sm { padding: 7px 18px; font-size: 0.85rem; }
        .btn-lg { padding: 14px 36px; font-size: 1.05rem; border-radius: var(--radius-md); }

        /* Hamburger */
        .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 6px; background: none; border: none; }
        .hamburger span { display: block; width: 26px; height: 2.5px; background: var(--primary); border-radius: 4px; transition: var(--transition); }

        /* ===== Hero Banner ===== */
        .hero-banner {
            margin-top: var(--header-height);
            min-height: 380px;
            display: flex;
            align-items: center;
            position: relative;
            background: var(--bg-dark) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
        }
        .hero-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,26,43,0.88) 0%, rgba(26,58,92,0.72) 60%, rgba(232,135,42,0.25) 100%);
            z-index: 1;
        }
        .hero-banner .container { position: relative; z-index: 2; width: 100%; }
        .hero-banner h1 { color: #fff; font-size: 2.8rem; max-width: 720px; text-shadow: 0 2px 20px rgba(0,0,0,0.2); }
        .hero-banner h1 i { color: var(--secondary); margin-right: 12px; }
        .hero-banner p { color: rgba(255,255,255,0.85); font-size: 1.15rem; max-width: 600px; margin-top: 12px; line-height: 1.8; }
        .hero-banner .hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
        .hero-banner .hero-tags span {
            background: rgba(255,255,255,0.15);
            backdrop-filter: blur(6px);
            color: #fff;
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid rgba(255,255,255,0.1);
        }

        /* ===== Section Titles ===== */
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 { font-size: 2rem; color: var(--primary); }
        .section-title p { font-size: 1.05rem; color: var(--text-weak); max-width: 640px; margin: 8px auto 0; }
        .section-title .title-line { width: 60px; height: 4px; background: var(--secondary); border-radius: 4px; margin: 14px auto 0; }

        /* ===== Tags Cloud ===== */
        .tags-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-top: 8px;
        }
        .tag-item {
            padding: 8px 22px;
            border-radius: 30px;
            font-size: 0.88rem;
            font-weight: 500;
            background: var(--bg-card);
            border: 1.5px solid var(--border);
            color: var(--text-secondary);
            transition: var(--transition);
            cursor: default;
        }
        .tag-item i { margin-right: 6px; color: var(--accent); }
        .tag-item:hover { border-color: var(--secondary); color: var(--secondary); background: rgba(232,135,42,0.05); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
        .tag-item.active { background: var(--secondary); color: #fff; border-color: var(--secondary); }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }
        .card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--border); }
        .card-img { position: relative; overflow: hidden; aspect-ratio: 16 / 10; background: #eef2f7; }
        .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
        .card:hover .card-img img { transform: scale(1.05); }
        .card-badge {
            position: absolute;
            top: 14px; left: 14px;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            background: var(--secondary);
            color: #fff;
            box-shadow: 0 2px 10px rgba(0,0,0,0.15);
        }
        .card-body { padding: 22px 24px 24px; flex: 1; display: flex; flex-direction: column; }
        .card-body h3 { font-size: 1.15rem; margin-bottom: 8px; color: var(--primary); }
        .card-body p { font-size: 0.9rem; color: var(--text-secondary); flex: 1; }
        .card-meta { display: flex; align-items: center; gap: 14px; margin-top: 16px; font-size: 0.82rem; color: var(--text-weak); border-top: 1px solid var(--border-light); padding-top: 14px; }
        .card-meta i { margin-right: 4px; }
        .card-link { margin-top: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
        .card-link i { font-size: 0.8rem; transition: transform 0.2s; }
        .card:hover .card-link i { transform: translateX(4px); }

        /* ===== Rank List ===== */
        .rank-list { background: var(--bg-card); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); padding: 8px 0; }
        .rank-item { display: flex; align-items: center; gap: 18px; padding: 16px 24px; border-bottom: 1px solid var(--border-light); transition: var(--transition); }
        .rank-item:last-child { border-bottom: none; }
        .rank-item:hover { background: rgba(26,58,92,0.03); }
        .rank-num { width: 32px; height: 32px; display: flex; align-items: center; justify-content: center; border-radius: 50%; font-weight: 800; font-size: 0.9rem; background: var(--border); color: var(--text-weak); flex-shrink: 0; }
        .rank-item:nth-child(1) .rank-num { background: var(--secondary); color: #fff; box-shadow: 0 2px 12px rgba(232,135,42,0.3); }
        .rank-item:nth-child(2) .rank-num { background: var(--primary-light); color: #fff; }
        .rank-item:nth-child(3) .rank-num { background: var(--accent); color: #fff; }
        .rank-info { flex: 1; }
        .rank-info h4 { font-size: 1rem; font-weight: 600; color: var(--text-primary); }
        .rank-info p { font-size: 0.85rem; color: var(--text-weak); margin: 2px 0 0; }
        .rank-score { font-weight: 700; color: var(--secondary); font-size: 1.05rem; }

        /* ===== Steps ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; counter-reset: step; }
        .step-card { background: var(--bg-card); border-radius: var(--radius-md); padding: 36px 28px; text-align: center; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); transition: var(--transition); position: relative; }
        .step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .step-card::before { counter-increment: step; content: counter(step); position: absolute; top: 16px; right: 20px; font-size: 3.2rem; font-weight: 900; color: rgba(26,58,92,0.06); line-height: 1; }
        .step-icon { width: 64px; height: 64px; border-radius: 50%; background: rgba(232,135,42,0.1); display: flex; align-items: center; justify-content: center; margin: 0 auto 18px; font-size: 1.6rem; color: var(--secondary); transition: var(--transition); }
        .step-card:hover .step-icon { background: var(--secondary); color: #fff; }
        .step-card h3 { font-size: 1.1rem; color: var(--primary); margin-bottom: 8px; }
        .step-card p { font-size: 0.9rem; color: var(--text-secondary); }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item { background: var(--bg-card); border-radius: var(--radius-sm); margin-bottom: 12px; box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); overflow: hidden; transition: var(--transition); }
        .faq-item:hover { border-color: var(--border); }
        .faq-question { padding: 18px 24px; font-weight: 600; font-size: 1rem; color: var(--text-primary); display: flex; align-items: center; gap: 12px; cursor: pointer; background: none; border: none; width: 100%; text-align: left; transition: var(--transition); }
        .faq-question i { color: var(--secondary); font-size: 1.1rem; transition: transform 0.3s; flex-shrink: 0; }
        .faq-item.open .faq-question i { transform: rotate(45deg); }
        .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; padding: 0 24px; }
        .faq-item.open .faq-answer { max-height: 300px; padding: 0 24px 20px; }
        .faq-answer p { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.8; }

        /* ===== CTA ===== */
        .cta-section { background: var(--bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat; position: relative; }
        .cta-section::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15,26,43,0.88) 0%, rgba(26,58,92,0.78) 100%); z-index: 1; }
        .cta-section .container { position: relative; z-index: 2; text-align: center; }
        .cta-section h2 { color: #fff; font-size: 2rem; }
        .cta-section p { color: rgba(255,255,255,0.8); font-size: 1.05rem; max-width: 560px; margin: 12px auto 28px; }
        .cta-section .btn { font-size: 1.05rem; padding: 14px 40px; }

        /* ===== Footer ===== */
        .footer { background: var(--bg-dark); color: rgba(255,255,255,0.7); padding: 56px 0 0; }
        .footer-inner { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; }
        .footer-brand .logo { color: #fff; margin-bottom: 14px; }
        .footer-brand .logo span { -webkit-text-fill-color: #fff; background: none; }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.6); max-width: 360px; line-height: 1.8; }
        .footer-inner div h4 { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 16px; letter-spacing: 0.5px; }
        .footer-inner div a { display: block; font-size: 0.9rem; color: rgba(255,255,255,0.6); padding: 4px 0; transition: var(--transition); }
        .footer-inner div a:hover { color: var(--secondary); padding-left: 4px; }
        .footer-bottom { max-width: var(--container-max); margin: 0 auto; padding: 24px 24px 20px; border-top: 1px solid rgba(255,255,255,0.08); margin-top: 40px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; font-size: 0.85rem; color: rgba(255,255,255,0.45); }

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

        @media (max-width: 820px) {
            .hero-banner { min-height: 300px; }
            .hero-banner h1 { font-size: 2rem; }
            .hero-banner p { font-size: 1rem; }
            .section { padding: 52px 0; }
            h2 { font-size: 1.6rem; }
        }

        @media (max-width: 768px) {
            .hamburger { display: flex; }
            .nav-main { display: none; flex-direction: column; position: absolute; top: var(--header-height); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); padding: 16px 24px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-md); gap: 4px; }
            .nav-main.open { display: flex; }
            .nav-main a { padding: 12px 16px; width: 100%; border-radius: var(--radius-sm); }
            .nav-cta { margin-left: 0; margin-top: 8px; width: 100%; }
            .nav-cta .btn { width: 100%; justify-content: center; }
            .hero-banner h1 { font-size: 1.7rem; }
            .hero-banner .hero-tags span { font-size: 0.78rem; padding: 4px 14px; }
            .card-grid { grid-template-columns: 1fr; gap: 20px; }
            .steps-grid { grid-template-columns: 1fr; gap: 20px; }
            .footer-inner { grid-template-columns: 1fr; gap: 32px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .section-title { margin-bottom: 32px; }
            .section-title h2 { font-size: 1.5rem; }
            .rank-item { padding: 14px 18px; gap: 14px; }
            .faq-question { padding: 16px 18px; font-size: 0.92rem; }
            .cta-section h2 { font-size: 1.5rem; }
        }

        @media (max-width: 480px) {
            .container { padding: 0 16px; }
            .hero-banner { min-height: 240px; }
            .hero-banner h1 { font-size: 1.4rem; }
            .hero-banner p { font-size: 0.9rem; }
            .section { padding: 36px 0; }
            .tags-cloud { gap: 8px; }
            .tag-item { padding: 6px 16px; font-size: 0.8rem; }
            .card-body { padding: 16px 18px 20px; }
            .card-body h3 { font-size: 1rem; }
            .step-card { padding: 24px 20px; }
            .btn-lg { padding: 12px 28px; font-size: 0.95rem; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-8 { margin-top: 8px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mb-16 { margin-bottom: 16px; }
        .gap-12 { gap: 12px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .flex-wrap { flex-wrap: wrap; }
        .bg-white { background: var(--bg-card); }
        .bg-light { background: #f0f4fa; }
        .rounded-md { border-radius: var(--radius-md); }
        .shadow-sm { box-shadow: var(--shadow-sm); }