/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0a1a2f;
            --primary-light: #12294a;
            --accent: #e8a838;
            --accent-dark: #c9871c;
            --accent-light: #f8d185;
            --bg-body: #f1f3f6;
            --bg-white: #ffffff;
            --bg-grey: #f6f8fa;
            --text-main: #1b2634;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-sm: 0 2px 10px rgba(13, 31, 60, 0.05);
            --shadow-md: 0 8px 28px rgba(13, 31, 60, 0.09);
            --shadow-lg: 0 16px 44px rgba(13, 31, 60, 0.13);
            --sidebar-width: 260px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 15px;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.25s ease;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }
        input,
        select,
        textarea {
            font-family: inherit;
        }
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ===== 侧边栏 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: linear-gradient(180deg, #070f1c 0%, #0c2137 70%, #102a45 100%);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            box-shadow: 4px 0 30px rgba(0, 0, 0, 0.25);
            transition: transform 0.35s ease;
        }
        .sidebar-brand {
            padding: 30px 22px 22px;
            display: flex;
            align-items: center;
            gap: 14px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.07);
        }
        .brand-icon {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, #f0bc5c, #c9871c);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0;
            box-shadow: 0 4px 16px rgba(232, 168, 56, 0.4);
        }
        .brand-text {
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 1px;
            white-space: nowrap;
        }
        .brand-text small {
            display: block;
            font-size: 11px;
            font-weight: 400;
            color: rgba(255, 255, 255, 0.45);
            letter-spacing: 2px;
            margin-top: 2px;
        }
        .sidebar-nav {
            flex: 1;
            padding: 22px 14px;
            display: flex;
            flex-direction: column;
            gap: 6px;
            overflow-y: auto;
        }
        .nav-label {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.35);
            letter-spacing: 3px;
            text-transform: uppercase;
            padding: 8px 14px 4px;
            font-weight: 600;
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 13px 16px;
            border-radius: 12px;
            color: rgba(255, 255, 255, 0.68);
            font-size: 15px;
            font-weight: 500;
            transition: all 0.25s ease;
            border-left: 3px solid transparent;
            position: relative;
        }
        .nav-item i {
            width: 22px;
            text-align: center;
            font-size: 16px;
            transition: color 0.25s;
        }
        .nav-item:hover {
            background: rgba(255, 255, 255, 0.05);
            color: #fff;
            transform: translateX(3px);
        }
        .nav-item.active {
            background: linear-gradient(90deg, rgba(232, 168, 56, 0.16), rgba(232, 168, 56, 0.03));
            color: var(--accent);
            border-left-color: var(--accent);
            font-weight: 600;
        }
        .nav-item.active::after {
            content: '';
            position: absolute;
            right: 12px;
            top: 50%;
            transform: translateY(-50%);
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 12px var(--accent);
        }
        .sidebar-footer {
            padding: 20px 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.07);
        }
        .sidebar-footer .btn {
            width: 100%;
            justify-content: center;
        }
        .sidebar-status {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 6px 2px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
        }
        .sidebar-status .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #22c55e;
            box-shadow: 0 0 8px rgba(34, 197, 94, 0.6);
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.4;
            }
        }

        /* ===== 主区域 ===== */
        .main-area {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 900;
            height: 60px;
            background: rgba(10, 26, 47, 0.95);
            backdrop-filter: blur(12px);
            align-items: center;
            padding: 0 20px;
            gap: 16px;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.18);
        }
        .mobile-toggle {
            color: #fff;
            font-size: 20px;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.08);
        }
        .mobile-logo {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            letter-spacing: 1px;
        }
        .mobile-logo small {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.5);
            margin-left: 6px;
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 999;
            backdrop-filter: blur(2px);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 120px 0 100px;
            min-height: 620px;
            display: flex;
            align-items: center;
            background: #070f1c;
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.4;
            transform: scale(1.02);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(7, 15, 28, 0.95) 15%, rgba(7, 15, 28, 0.75) 55%, rgba(7, 15, 28, 0.55) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(232, 168, 56, 0.15);
            border: 1px solid rgba(232, 168, 56, 0.3);
            color: var(--accent-light);
            padding: 8px 18px;
            border-radius: 100px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 26px;
        }
        .hero-badge i {
            font-size: 12px;
        }
        .hero h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            letter-spacing: 2px;
            margin-bottom: 24px;
        }
        .hero h1 .hero-em {
            color: var(--accent);
            font-weight: 700;
        }
        .hero-subtitle {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.8;
            margin-bottom: 36px;
            max-width: 580px;
        }
        .hero-buttons {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 44px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 13px 28px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.5px;
            transition: all 0.3s ease;
            border: 2px solid transparent;
        }
        .btn-accent {
            background: linear-gradient(135deg, #f0bc5c, #e8a838 60%, #d9911e);
            color: #0a1a2f;
            box-shadow: 0 4px 20px rgba(232, 168, 56, 0.35);
        }
        .btn-accent:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(232, 168, 56, 0.5);
        }
        .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.5);
            color: #fff;
            background: rgba(255, 255, 255, 0.05);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-3px);
        }
        .hero-features {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }
        .hero-feature {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.65);
            font-size: 13px;
        }
        .hero-feature i {
            color: var(--accent);
            font-size: 15px;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 90px 0;
            position: relative;
        }
        .section-header {
            max-width: 640px;
            margin-bottom: 52px;
        }
        .section-header.center {
            text-align: center;
            margin-left: auto;
            margin-right: auto;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 2px;
            text-transform: uppercase;
            color: var(--accent);
            background: rgba(232, 168, 56, 0.08);
            padding: 6px 16px;
            border-radius: 100px;
            margin-bottom: 16px;
            border: 1px solid rgba(232, 168, 56, 0.15);
        }
        .section-header h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }
        .section-header p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        /* ===== 特性 ===== */
        .features {
            background: var(--bg-white);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--accent), transparent);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.35s ease;
        }
        .feature-card:hover {
            border-color: rgba(232, 168, 56, 0.4);
            box-shadow: var(--shadow-md);
            transform: translateY(-6px);
        }
        .feature-card:hover::before {
            transform: scaleX(1);
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(232, 168, 56, 0.2), rgba(232, 168, 56, 0.06));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--accent);
            margin-bottom: 20px;
            border: 1px solid rgba(232, 168, 56, 0.15);
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== 分类入口 ===== */
        .categories {
            background: var(--bg-grey);
        }
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .category-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all 0.35s ease;
            box-shadow: var(--shadow-sm);
            display: block;
        }
        .category-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(232, 168, 56, 0.3);
        }
        .category-card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .category-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .category-card:hover .category-card-img img {
            transform: scale(1.06);
        }
        .category-card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(7, 15, 28, 0.7));
        }
        .category-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 2;
            background: rgba(232, 168, 56, 0.92);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 100px;
            letter-spacing: 1px;
        }
        .category-card-body {
            padding: 24px 26px 26px;
        }
        .category-num {
            font-size: 12px;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: 2px;
            margin-bottom: 6px;
            display: block;
        }
        .category-card-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .category-card-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            transition: gap 0.25s ease;
        }
        .category-card:hover .category-link {
            gap: 14px;
        }
        .category-link i {
            font-size: 12px;
        }

        /* ===== 数据板块 ===== */
        .data-section {
            background: #070f1c;
            padding: 100px 0;
            position: relative;
            overflow: hidden;
        }
        .data-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.2;
        }
        .data-section .container {
            position: relative;
            z-index: 2;
        }
        .data-section .section-header h2 {
            color: #fff;
        }
        .data-section .section-header p {
            color: rgba(255, 255, 255, 0.55);
        }
        .data-section .section-tag {
            color: var(--accent-light);
            border-color: rgba(232, 168, 56, 0.3);
        }
        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .data-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 36px 24px;
            text-align: center;
            backdrop-filter: blur(6px);
            transition: all 0.3s ease;
        }
        .data-card:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(232, 168, 56, 0.3);
            transform: translateY(-4px);
        }
        .data-icon {
            width: 48px;
            height: 48px;
            margin: 0 auto 16px;
            border-radius: 14px;
            background: rgba(232, 168, 56, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--accent);
        }
        .data-card strong {
            display: block;
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 6px;
            font-family: "SF Pro Display", -apple-system, sans-serif;
        }
        .data-card span {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            letter-spacing: 1px;
        }

        /* ===== 资讯列表 ===== */
        .latest-news {
            background: var(--bg-white);
        }
        .news-wrapper {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .news-item {
            background: var(--bg-grey);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 28px 30px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        .news-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            width: 3px;
            height: 100%;
            background: var(--accent);
            opacity: 0;
            transition: opacity 0.3s;
        }
        .news-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: rgba(232, 168, 56, 0.25);
        }
        .news-item:hover::before {
            opacity: 1;
        }
        .news-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 14px;
            font-size: 13px;
        }
        .news-category {
            background: rgba(232, 168, 56, 0.12);
            color: var(--accent-dark);
            padding: 4px 12px;
            border-radius: 100px;
            font-weight: 600;
        }
        .news-date {
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
        }
        .news-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
        }
        .news-title a {
            color: var(--text-main);
            transition: color 0.2s;
        }
        .news-title a:hover {
            color: var(--accent);
        }
        .news-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap 0.25s;
        }
        .news-more:hover {
            gap: 10px;
        }
        .empty-tip {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-grey);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border);
            color: var(--text-muted);
        }
        .empty-tip i {
            font-size: 32px;
            margin-bottom: 12px;
            color: #c0c8d0;
        }

        /* ===== 流程板块 ===== */
        .process-section {
            background: #0d1f3c;
            padding: 100px 0;
            position: relative;
            overflow: hidden;
        }
        .process-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: 0.08;
        }
        .process-section .container {
            position: relative;
            z-index: 2;
        }
        .process-section .section-header h2 {
            color: #fff;
        }
        .process-section .section-header p {
            color: rgba(255, 255, 255, 0.5);
        }
        .process-section .section-tag {
            color: var(--accent-light);
            border-color: rgba(232, 168, 56, 0.3);
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: process;
        }
        .process-step {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            position: relative;
            transition: all 0.3s ease;
            backdrop-filter: blur(4px);
        }
        .process-step:hover {
            background: rgba(255, 255, 255, 0.07);
            border-color: rgba(232, 168, 56, 0.3);
            transform: translateY(-4px);
        }
        .step-num {
            font-size: 34px;
            font-weight: 800;
            color: transparent;
            -webkit-text-stroke: 1.5px rgba(232, 168, 56, 0.6);
            margin-bottom: 14px;
            font-family: "SF Pro Display", sans-serif;
        }
        .process-step h3 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .process-step p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
            line-height: 1.7;
        }
        .process-step::after {
            content: '→';
            position: absolute;
            right: -18px;
            top: 50%;
            transform: translateY(-50%);
            color: rgba(232, 168, 56, 0.4);
            font-size: 20px;
            z-index: 3;
        }
        .process-step:last-child::after {
            display: none;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-grey);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .faq-item:hover {
            border-color: rgba(232, 168, 56, 0.3);
            box-shadow: var(--shadow-md);
        }
        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 26px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            list-style: none;
            transition: color 0.2s;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary i {
            color: var(--accent);
            font-size: 14px;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        .faq-item[open] summary i {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 26px 24px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.8;
            border-top: 1px solid var(--border);
            margin-top: 0;
            padding-top: 18px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-white);
            padding: 90px 0;
        }
        .cta-card {
            background: linear-gradient(135deg, #0d1f3c 0%, #12294a 60%, #1a3a5c 100%);
            border-radius: 28px;
            padding: 70px 60px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(13, 31, 60, 0.3);
        }
        .cta-card::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(232, 168, 56, 0.2), transparent 65%);
        }
        .cta-card::after {
            content: '';
            position: absolute;
            bottom: -60%;
            left: -10%;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.06), transparent 65%);
        }
        .cta-card h2 {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }
        .cta-card p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 32px;
            position: relative;
            z-index: 1;
        }
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .cta-buttons .btn-accent {
            font-size: 16px;
            padding: 14px 36px;
        }
        .cta-buttons .btn-outline-light {
            font-size: 16px;
            padding: 14px 36px;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: #070f1c;
            color: rgba(255, 255, 255, 0.6);
            padding-top: 70px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 50px;
            padding-bottom: 46px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand h3 {
            color: #fff;
            font-size: 24px;
            font-weight: 800;
            letter-spacing: 1px;
            margin-bottom: 10px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.45);
            max-width: 300px;
        }
        .footer-brand .brand-icon {
            margin-bottom: 16px;
        }
        .footer-links h4,
        .footer-contact h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: 1px;
        }
        .footer-links a {
            display: block;
            padding: 6px 0;
            color: rgba(255, 255, 255, 0.5);
            font-size: 14px;
            transition: all 0.25s;
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 6px;
        }
        .footer-contact p {
            font-size: 14px;
            padding: 6px 0;
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-contact i {
            color: var(--accent);
            font-size: 14px;
        }
        .footer-bottom {
            padding: 22px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.3);
        }
        .footer-bottom span {
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
                box-shadow: none;
            }
            .sidebar.open {
                transform: translateX(0);
                box-shadow: 4px 0 40px rgba(0, 0, 0, 0.4);
            }
            .sidebar-overlay.active {
                display: block;
            }
            .main-area {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .categories-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-step::after {
                display: none;
            }
            .news-wrapper {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero h1 {
                font-size: 38px;
            }
        }
        @media (max-width: 768px) {
            .section {
                padding: 70px 0;
            }
            .hero {
                padding: 90px 0 70px;
                min-height: auto;
            }
            .hero h1 {
                font-size: 32px;
                letter-spacing: 1px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .section-header h2 {
                font-size: 28px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .categories-grid {
                grid-template-columns: 1fr;
            }
            .data-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .cta-card {
                padding: 44px 24px;
                border-radius: 20px;
            }
            .cta-card h2 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .container {
                padding: 0 20px;
            }
        }
        @media (max-width: 520px) {
            .hero h1 {
                font-size: 26px;
            }
            .hero-buttons .btn {
                width: 100%;
                justify-content: center;
            }
            .data-grid {
                grid-template-columns: 1fr;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .section-tag {
                font-size: 12px;
            }
            .news-item {
                padding: 22px;
            }
            .news-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .cta-buttons .btn {
                width: 100%;
                justify-content: center;
            }
            .mobile-logo small {
                display: none;
            }
        }

/* roulang page: category1 */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #dbeafe;
  --accent: #06b6d4;
  --bg: #f5f7fb;
  --surface: #ffffff;
  --sidebar-bg: #0b1220;
  --sidebar-text: #94a3b8;
  --sidebar-active: #ffffff;
  --text: #0f172a;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(2, 12, 27, 0.08);
  --shadow-lg: 0 20px 45px rgba(2, 12, 27, 0.12);
  --transition: 0.25s ease;
}
*, *::before, *::after { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: "Inter", "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.7; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; cursor: pointer; }
ul, ol, p, h1, h2, h3, h4, h5 { margin: 0; padding: 0; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 40px; }
.sidebar {
  position: fixed; inset: 0 auto 0 0; width: 252px; background: var(--sidebar-bg);
  color: var(--sidebar-text); display: flex; flex-direction: column; padding: 28px 18px 18px;
  z-index: 1000; transition: transform 0.3s ease; overflow-y: auto;
}
.sidebar-brand { padding: 0 10px 22px; border-bottom: 1px solid rgba(255, 255, 255, 0.08); }
.brand-logo { display: flex; align-items: center; gap: 12px; }
.brand-icon {
  width: 40px; height: 40px; border-radius: 12px; background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 20px;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35); flex-shrink: 0;
}
.brand-name { color: #fff; font-size: 20px; font-weight: 700; letter-spacing: 0.02em; }
.brand-sub { font-size: 12px; color: #64748b; margin-top: 8px; padding-left: 2px; }
.sidebar-nav { display: flex; flex-direction: column; gap: 6px; margin-top: 24px; flex: 1; }
.nav-label { font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: #475569; padding: 0 12px; margin-bottom: 6px; font-weight: 600; }
.nav-item { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: 12px; color: var(--sidebar-text); font-size: 15px; font-weight: 500; transition: all var(--transition); }
.nav-item i { width: 20px; text-align: center; font-size: 16px; flex-shrink: 0; }
.nav-item:hover { background: rgba(255, 255, 255, 0.06); color: #e2e8f0; }
.nav-item.active { background: var(--primary); color: #fff; box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35); }
.sidebar-foot { padding: 16px 10px 4px; border-top: 1px solid rgba(255, 255, 255, 0.08); font-size: 13px; display: flex; align-items: center; gap: 8px; margin-top: 20px; }
.online-dot { width: 8px; height: 8px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.15); flex-shrink: 0; }
.main-wrapper { margin-left: 252px; min-height: 100vh; display: flex; flex-direction: column; }
.mobile-topbar { display: none; position: sticky; top: 0; z-index: 900; background: rgba(11, 18, 32, 0.95); backdrop-filter: blur(8px); align-items: center; justify-content: space-between; padding: 12px 18px; color: #fff; }
.menu-toggle { background: rgba(255, 255, 255, 0.08); border: none; border-radius: 10px; color: #fff; width: 40px; height: 40px; font-size: 16px; display: flex; align-items: center; justify-content: center; transition: background 0.25s; }
.menu-toggle:hover { background: rgba(255, 255, 255, 0.16); }
.topbar-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; color: #fff; }
.topbar-logo .brand-icon { width: 34px; height: 34px; border-radius: 10px; font-size: 16px; box-shadow: none; }
.topbar-contact { color: #94a3b8; font-size: 17px; width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border-radius: 10px; transition: all 0.25s; }
.topbar-contact:hover { background: rgba(255, 255, 255, 0.08); color: #fff; }
.overlay { position: fixed; inset: 0; background: rgba(2, 8, 20, 0.55); opacity: 0; visibility: hidden; transition: all 0.3s ease; z-index: 950; }
.overlay.show { opacity: 1; visibility: visible; }
.page-banner { position: relative; padding: 92px 0 76px; background-size: cover; background-position: center; color: #fff; }
.page-banner::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(5, 12, 25, 0.92) 0%, rgba(5, 12, 25, 0.78) 45%, rgba(5, 12, 25, 0.55) 100%); }
.banner-content { position: relative; z-index: 2; max-width: 740px; }
.crumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: #94a3b8; margin-bottom: 20px; }
.crumb a { transition: color 0.2s; }
.crumb a:hover { color: #fff; }
.crumb i { font-size: 10px; opacity: 0.7; }
.banner-tag { display: inline-flex; align-items: center; gap: 8px; padding: 6px 16px; border-radius: 999px; background: rgba(255, 255, 255, 0.12); border: 1px solid rgba(255, 255, 255, 0.18); font-size: 13px; font-weight: 600; letter-spacing: 0.04em; backdrop-filter: blur(6px); }
.banner-tag i { color: #22c55e; }
.banner-content h1 { font-size: 42px; line-height: 1.25; font-weight: 800; margin: 22px 0 16px; letter-spacing: -0.02em; }
.banner-content p { font-size: 17px; line-height: 1.8; color: rgba(226, 232, 240, 0.9); max-width: 640px; margin-bottom: 30px; }
.banner-btns { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 13px 28px; border-radius: 12px; font-size: 15px; font-weight: 600; border: none; transition: all var(--transition); }
.btn i { font-size: 15px; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 10px 25px rgba(37, 99, 235, 0.35); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 14px 30px rgba(37, 99, 235, 0.4); }
.btn-ghost { background: rgba(255, 255, 255, 0.1); color: #fff; border: 1px solid rgba(255, 255, 255, 0.22); backdrop-filter: blur(4px); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.18); transform: translateY(-2px); }
.status-strip { display: flex; flex-wrap: wrap; gap: 12px; }
.status-card { display: flex; align-items: center; gap: 12px; background: rgba(255, 255, 255, 0.08); border: 1px solid rgba(255, 255, 255, 0.12); padding: 12px 18px; border-radius: 14px; font-size: 13px; backdrop-filter: blur(6px); }
.status-card i { font-size: 18px; color: var(--accent); }
.status-card strong { color: #fff; font-weight: 600; }
.section { padding: 84px 0; }
.intro-section { background: var(--surface); border-bottom: 1px solid var(--border); }
.intro-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 50px; align-items: center; }
.intro-copy h2 { font-size: 30px; line-height: 1.4; margin-bottom: 18px; letter-spacing: -0.01em; }
.intro-copy h2 span { color: var(--primary); }
.intro-copy p { color: var(--text-muted); font-size: 16px; line-height: 1.9; margin-bottom: 16px; }
.intro-copy .intro-link { display: inline-flex; align-items: center; gap: 8px; color: var(--primary); font-weight: 600; font-size: 15px; margin-top: 8px; transition: gap 0.2s ease; }
.intro-copy .intro-link:hover { gap: 12px; }
.intro-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.stat-card { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px 22px; text-align: center; transition: all var(--transition); }
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--primary-light); }
.stat-card .num { font-size: 30px; font-weight: 800; color: var(--primary); line-height: 1.2; }
.stat-card .lbl { font-size: 14px; color: var(--text-muted); margin-top: 6px; }
.section-head { text-align: center; margin-bottom: 46px; }
.sec-tag { display: inline-flex; align-items: center; gap: 6px; padding: 6px 16px; border-radius: 999px; background: var(--primary-light); color: var(--primary); font-size: 13px; font-weight: 600; }
.section-head h2 { font-size: 32px; margin: 14px 0 10px; letter-spacing: -0.02em; }
.section-head p { font-size: 16px; color: var(--text-muted); max-width: 560px; margin: 0 auto; }
.guide-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.guide-card { background: var(--surface); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid rgba(226, 232, 240, 0.7); transition: all 0.3s ease; }
.guide-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.guide-card-img { height: 190px; overflow: hidden; position: relative; }
.guide-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.guide-card:hover .guide-card-img img { transform: scale(1.05); }
.guide-card-tag { position: absolute; top: 14px; left: 14px; z-index: 2; padding: 4px 14px; border-radius: 999px; background: rgba(11, 18, 32, 0.6); color: #fff; font-size: 12px; font-weight: 500; backdrop-filter: blur(6px); border: 1px solid rgba(255, 255, 255, 0.15); }
.guide-card-body { padding: 24px; }
.guide-card-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.guide-card-body p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }
.guide-card-body .card-link { display: inline-flex; align-items: center; gap: 6px; color: var(--primary); font-size: 14px; font-weight: 600; margin-top: 14px; transition: gap 0.2s; }
.guide-card-body .card-link:hover { gap: 10px; }
.feature-section { background: linear-gradient(180deg, var(--bg) 0%, #eef2f8 100%); }
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 54px; align-items: center; }
.feature-media { border-radius: 20px; overflow: hidden; box-shadow: var(--shadow-lg); position: relative; }
.feature-media img { width: 100%; height: 380px; object-fit: cover; }
.feature-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 40%, rgba(11, 18, 32, 0.3)); }
.feature-content h2 { font-size: 28px; line-height: 1.4; margin-bottom: 18px; }
.feature-list { list-style: none; display: flex; flex-direction: column; gap: 18px; }
.feature-list li { display: flex; gap: 14px; align-items: flex-start; }
.feature-icon { width: 42px; height: 42px; border-radius: 12px; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 17px; flex-shrink: 0; }
.feature-list strong { display: block; font-size: 16px; margin-bottom: 4px; }
.feature-list span { color: var(--text-muted); font-size: 14px; line-height: 1.7; }
.articles-section { background: var(--surface); }
.articles-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.article-row { display: flex; gap: 18px; background: var(--bg); border: 1px solid var(--border); border-radius: 14px; padding: 24px; transition: all var(--transition); }
.article-row:hover { background: var(--surface); box-shadow: var(--shadow); border-color: var(--primary-light); transform: translateY(-3px); }
.article-icon { width: 48px; height: 48px; border-radius: 13px; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 19px; flex-shrink: 0; }
.article-info h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
.article-info p { font-size: 13px; color: var(--text-muted); line-height: 1.6; margin-bottom: 8px; }
.article-meta { display: flex; gap: 10px; font-size: 12px; color: var(--text-muted); }
.article-meta .tag { color: var(--primary); background: var(--primary-light); padding: 2px 10px; border-radius: 999px; font-weight: 500; }
.steps-section { background: var(--sidebar-bg); color: #fff; }
.steps-section .section-head h2 { color: #fff; }
.steps-section .section-head p { color: rgba(148, 163, 184, 0.9); }
.steps-section .sec-tag { background: rgba(255, 255, 255, 0.1); color: #93c5fd; }
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step-item { background: rgba(255, 255, 255, 0.05); border: 1px solid rgba(255, 255, 255, 0.09); border-radius: var(--radius); padding: 32px 26px; transition: all var(--transition); position: relative; }
.step-item:hover { background: rgba(255, 255, 255, 0.09); transform: translateY(-5px); }
.step-num { font-size: 36px; font-weight: 800; color: rgba(147, 197, 253, 0.4); line-height: 1; margin-bottom: 14px; }
.step-item h3 { font-size: 17px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.step-item p { font-size: 14px; color: rgba(148, 163, 184, 0.9); line-height: 1.7; }
.faq-section { background: var(--surface); }
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item { background: var(--bg); border: 1px solid var(--border); border-radius: 14px; margin-bottom: 14px; overflow: hidden; transition: all var(--transition); }
.faq-item.open { border-color: var(--primary-light); box-shadow: var(--shadow); }
.faq-q { display: flex; justify-content: space-between; align-items: center; padding: 20px 24px; cursor: pointer; font-weight: 600; font-size: 16px; gap: 16px; }
.faq-q i { color: var(--primary); font-size: 14px; transition: transform 0.3s; flex-shrink: 0; }
.faq-item.open .faq-q i { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.3s ease; line-height: 1.8; }
.faq-item.open .faq-a { max-height: 260px; padding: 0 24px 20px; }
.cta-band { background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%); color: #fff; padding: 76px 0; position: relative; overflow: hidden; }
.cta-band::before { content: ""; position: absolute; top: -50%; right: -20%; width: 420px; height: 420px; border-radius: 50%; background: radial-gradient(circle, rgba(37, 99, 235, 0.3), transparent 60%); }
.cta-band .container { position: relative; z-index: 2; text-align: center; }
.cta-band h2 { font-size: 32px; font-weight: 800; margin-bottom: 14px; }
.cta-band p { font-size: 16px; color: rgba(226, 232, 240, 0.85); max-width: 560px; margin: 0 auto 30px; }
.cta-btns { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }
.footer { background: #0b1220; color: #94a3b8; padding: 64px 0 0; margin-top: auto; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 42px; padding-bottom: 42px; border-bottom: 1px solid rgba(255, 255, 255, 0.07); }
.footer-brand .brand-icon { margin-bottom: 14px; }
.footer-brand h3 { color: #fff; font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.footer-brand p { font-size: 14px; line-height: 1.8; max-width: 330px; }
.footer-links h4, .footer-contact h4 { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 18px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 14px; transition: color 0.2s; }
.footer-links a:hover { color: #fff; }
.footer-contact p { font-size: 14px; margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.footer-contact i { color: var(--primary); width: 18px; }
.footer-bottom { padding: 22px 0; text-align: center; font-size: 13px; color: #64748b; }
.footer-bottom span { color: #94a3b8; }
@media (max-width: 1180px) {
  .guide-cards { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .container { padding: 0 32px; }
}
@media (max-width: 1023px) {
  .sidebar { transform: translateX(-100%); width: 280px; }
  .sidebar.open { transform: translateX(0); }
  .main-wrapper { margin-left: 0; }
  .mobile-topbar { display: flex; }
  .intro-grid { grid-template-columns: 1fr; gap: 32px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-media img { height: 300px; }
  .articles-list { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .container { padding: 0 22px; }
  .page-banner { padding: 64px 0 54px; }
  .banner-content h1 { font-size: 30px; }
  .banner-content p { font-size: 15px; }
  .guide-cards { grid-template-columns: 1fr; }
  .intro-stats { grid-template-columns: 1fr 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .section { padding: 60px 0; }
  .section-head h2 { font-size: 25px; }
  .cta-band h2 { font-size: 26px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .banner-content h1 { font-size: 25px; }
  .banner-btns .btn { width: 100%; }
  .status-strip { flex-direction: column; }
  .intro-stats { grid-template-columns: 1fr; }
  .article-row { flex-direction: column; }
  .article-icon { width: 44px; height: 44px; }
  .page-banner { padding: 48px 0 44px; }
  .section { padding: 48px 0; }
}
@media (max-width: 1023px) and (min-width: 521px) {
  .topbar-logo .brand-icon { width: 34px; height: 34px; }
}

/* roulang page: article */
:root {
    --primary: #4f6bf7;
    --primary-600: #3b54e5;
    --primary-700: #2f44cc;
    --secondary: #06b6d4;
    --accent: #8b5cf6;
    --bg-dark: #0f172a;
    --bg-sidebar: #111c34;
    --bg-body: #f1f5fb;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-sub: #475569;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --radius-xl: 20px;
    --radius-lg: 14px;
    --radius-md: 10px;
    --radius-sm: 6px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,.05), 0 4px 12px rgba(0,0,0,.04);
    --shadow-md: 0 6px 20px rgba(79,107,247,.10);
    --shadow-lg: 0 16px 40px rgba(15,23,42,.12);
    --transition: all .25s ease;
    --sidebar-width: 264px;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-sans);
    background: var(--bg-body);
    color: var(--text-main);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }
ul, ol { list-style-position: inside; }
h1, h2, h3, h4 { line-height: 1.3; font-weight: 700; color: var(--text-main); }

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

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    border: 2px solid transparent;
    transition: var(--transition);
    line-height: 1.4;
    cursor: pointer;
    justify-content: center;
}
.btn i { font-size: 14px; }
.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(79,107,247,.35);
}
.btn-primary:hover {
    background: var(--primary-600);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(79,107,247,.4);
}
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(79,107,247,.3); }
.btn-outline {
    background: transparent;
    border-color: var(--primary);
    color: var(--primary);
}
.btn-outline:hover { background: rgba(79,107,247,.08); transform: translateY(-2px); }
.btn-light {
    background: #fff;
    color: var(--text-main);
    box-shadow: 0 4px 14px rgba(0,0,0,.12);
}
.btn-light:hover { background: #f8fafc; transform: translateY(-2px); }
.btn-outline-light {
    background: transparent;
    border-color: rgba(255,255,255,.7);
    color: #fff;
}
.btn-outline-light:hover { background: rgba(255,255,255,.1); transform: translateY(-2px); }
.btn-block { width: 100%; }

/* ===== 徽章 / 标签 ===== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.4;
}
.badge-primary {
    background: rgba(79,107,247,.12);
    color: var(--primary);
    border: 1px solid rgba(79,107,247,.2);
}
.tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    background: #f1f5f9;
    border-radius: 999px;
    font-size: 13px;
    color: var(--text-sub);
    border: 1px solid var(--border);
}

/* ===== App Shell 布局 ===== */
.app-shell { display: flex; min-height: 100vh; }

/* 左侧导航 */
.sidebar {
    width: var(--sidebar-width);
    background: linear-gradient(180deg, var(--bg-sidebar) 0%, #0d1527 100%);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    color: #94a3b8;
    transition: transform .3s ease, box-shadow .3s ease;
    overflow-y: auto;
}
.sidebar-inner { display: flex; flex-direction: column; min-height: 100%; padding: 24px 0; }
.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 24px 28px;
    border-bottom: 1px solid rgba(255,255,255,.06);
}
.brand-icon {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    font-size: 20px;
    font-weight: 800;
    box-shadow: 0 6px 18px rgba(79,107,247,.4);
    flex-shrink: 0;
}
.brand-name {
    font-size: 19px;
    font-weight: 800;
    color: #fff;
    letter-spacing: .5px;
    white-space: nowrap;
}
.sidebar-nav {
    padding: 20px 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}
.nav-label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: #475569;
    padding: 0 12px;
    margin-bottom: 10px;
}
.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    color: #94a3b8;
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
}
.nav-item:hover {
    background: rgba(255,255,255,.06);
    color: #fff;
}
.nav-item.active {
    background: linear-gradient(135deg, rgba(79,107,247,.2), rgba(139,92,246,.15));
    color: #fff;
    font-weight: 600;
    border-left: 3px solid var(--primary);
}
.nav-item i { width: 20px; text-align: center; font-size: 15px; }
.sidebar-foot { padding: 20px 24px; }
.sider-card {
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: var(--radius-lg);
    padding: 18px;
    text-align: center;
}
.sider-card i { font-size: 24px; color: var(--secondary); margin-bottom: 8px; }
.sider-card p { font-size: 13px; color: #94a3b8; }

/* 主内容区 */
.main-wrap { flex: 1; margin-left: var(--sidebar-width); min-width: 0; display: flex; flex-direction: column; }

.mobile-header {
    display: none;
    align-items: center;
    justify-content: space-between;
    background: #fff;
    height: 60px;
    padding: 0 16px;
    position: sticky;
    top: 0;
    z-index: 900;
    box-shadow: 0 2px 12px rgba(0,0,0,.06);
}
.menu-toggle {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    border-radius: 8px;
    font-size: 18px;
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
}
.menu-toggle:hover { background: #f1f5f9; }
.mobile-logo { font-size: 17px; font-weight: 800; color: var(--text-main); }
.mobile-home {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    color: var(--text-sub);
    font-size: 16px;
}
.mobile-home:hover { background: #f1f5f9; }

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15,23,42,.5);
    z-index: 999;
    backdrop-filter: blur(2px);
}

/* ===== 文章 Hero ===== */
.article-hero {
    background: linear-gradient(135deg, rgba(11,19,33,.93), rgba(30,41,59,.82)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    padding: 72px 0 80px;
    color: #fff;
    position: relative;
    overflow: hidden;
}
.article-hero::after {
    content: '';
    position: absolute;
    right: -80px;
    top: -80px;
    width: 260px;
    height: 260px;
    background: radial-gradient(circle, rgba(79,107,247,.25), transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}
.article-hero-inner { max-width: 860px; position: relative; z-index: 1; }
.article-meta { display: flex; align-items: center; gap: 16px; margin-bottom: 22px; flex-wrap: wrap; }
.article-date { font-size: 14px; color: rgba(255,255,255,.7); display: inline-flex; align-items: center; gap: 6px; }
.article-hero h1 {
    font-size: clamp(28px, 3.2vw, 44px);
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: .5px;
    line-height: 1.25;
}
.article-desc {
    font-size: 16px;
    line-height: 1.8;
    color: rgba(255,255,255,.75);
    margin-bottom: 0;
    max-width: 720px;
}

/* ===== 文章正文 ===== */
.article-body-section { padding: 48px 0 56px; }
.article-card {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    padding: clamp(28px, 4vw, 56px);
}
.article-content { font-size: 16px; line-height: 1.9; color: var(--text-sub); }
.article-content h2 {
    font-size: 1.5em;
    margin: 1.8em 0 .6em;
    color: var(--text-main);
    padding-bottom: 8px;
    border-bottom: 2px solid #f1f5f9;
}
.article-content h3 { font-size: 1.2em; margin: 1.5em 0 .5em; color: var(--text-main); }
.article-content p { margin-bottom: 1.2em; }
.article-content img {
    width: 100%;
    border-radius: var(--radius-lg);
    margin: 1.2em 0;
    box-shadow: var(--shadow-sm);
}
.article-content ul, .article-content ol { padding-left: 1.5em; margin: 1em 0; }
.article-content li { margin-bottom: .5em; }
.article-content blockquote {
    border-left: 4px solid var(--primary);
    background: #f8fafc;
    padding: 16px 20px;
    margin: 1.5em 0;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--text-sub);
    font-style: italic;
}
.article-content pre {
    background: #0f172a;
    color: #e2e8f0;
    padding: 20px;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: 1.5em 0;
    font-size: 14px;
    line-height: 1.7;
}
.article-content code {
    background: #f1f5f9;
    color: var(--primary-700);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 14px;
}
.article-content pre code { background: transparent; color: inherit; padding: 0; }
.article-tags {
    margin-top: 36px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* ===== 未找到 ===== */
.not-found {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    padding: 64px 32px;
    text-align: center;
}
.not-found > i { font-size: 48px; color: var(--primary); margin-bottom: 16px; opacity: .8; }
.not-found h2 { font-size: 28px; margin-bottom: 12px; }
.not-found p { color: var(--text-muted); margin-bottom: 24px; }
.not-found-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ===== 推荐服务 ===== */
.recommend-section { padding: 56px 0 64px; background: var(--bg-body); }
.section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    margin-bottom: 32px;
    gap: 16px;
    flex-wrap: wrap;
}
.section-subtitle {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--primary);
    display: block;
    margin-bottom: 6px;
}
.section-head h2 { font-size: 26px; font-weight: 800; }
.section-more {
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
    padding: 8px 4px;
}
.section-more:hover { gap: 12px; }
.recommend-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.recommend-card {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}
.recommend-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(79,107,247,.3);
}
.recommend-img { height: 180px; overflow: hidden; background: #e2e8f0; }
.recommend-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.recommend-card:hover .recommend-img img { transform: scale(1.05); }
.recommend-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.recommend-body h3 { font-size: 18px; margin-bottom: 8px; }
.recommend-body p { font-size: 14px; color: var(--text-muted); margin-bottom: 16px; flex: 1; line-height: 1.7; }
.link-more {
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}
.link-more i { font-size: 12px; }
.recommend-card:hover .link-more { gap: 10px; }

/* ===== FAQ ===== */
.faq-section { padding: 64px 0; background: #fff; }
.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.faq-item {
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: var(--transition);
}
.faq-item:hover {
    border-color: rgba(79,107,247,.3);
    box-shadow: var(--shadow-sm);
}
.faq-item h3 {
    font-size: 16px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
}
.faq-item h3 i { color: var(--primary); }
.faq-item p { font-size: 14px; color: var(--text-sub); line-height: 1.8; margin: 0; }

/* ===== CTA ===== */
.cta-section { padding: 0; }
.cta-inner {
    background: linear-gradient(135deg, #0f172a, #1e293b), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
    border-radius: var(--radius-xl);
    padding: 56px 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    flex-wrap: wrap;
    margin-bottom: 64px;
    position: relative;
    overflow: hidden;
}
.cta-inner::after {
    content: '';
    position: absolute;
    right: -60px;
    bottom: -60px;
    width: 180px;
    height: 180px;
    background: radial-gradient(circle, rgba(6,182,212,.2), transparent 70%);
    border-radius: 50%;
}
.cta-text { max-width: 480px; position: relative; z-index: 1; }
.cta-text h2 { font-size: 26px; font-weight: 800; color: #fff; margin-bottom: 8px; }
.cta-text p { color: rgba(255,255,255,.7); font-size: 15px; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; position: relative; z-index: 1; }

/* ===== Footer ===== */
.footer { background: #0d1527; color: #94a3b8; padding-top: 56px; }
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.4fr;
    gap: 40px;
    padding-bottom: 40px;
}
.footer-brand .brand-icon { margin-bottom: 16px; }
.footer-brand h3 { color: #fff; font-size: 22px; margin-bottom: 10px; }
.footer-brand p { font-size: 14px; line-height: 1.8; color: #64748b; max-width: 300px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links h4 { color: #fff; font-size: 16px; margin-bottom: 8px; }
.footer-links a { font-size: 14px; color: #94a3b8; transition: var(--transition); }
.footer-links a:hover { color: var(--primary); padding-left: 4px; }
.footer-contact h4 { color: #fff; font-size: 16px; margin-bottom: 12px; }
.footer-contact p { font-size: 14px; margin-bottom: 8px; display: flex; align-items: center; gap: 8px; }
.footer-contact i { color: var(--primary); width: 18px; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.06);
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: #64748b;
}
.footer-bottom span { color: #94a3b8; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .recommend-grid { grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .faq-grid { grid-template-columns: 1fr 1fr; }
    .sidebar { width: 240px; }
    .main-wrap { margin-left: 240px; }
    .brand-logo { padding: 0 18px 24px; }
    .sidebar-nav { padding: 16px 10px; }
    .cta-inner { padding: 44px 32px; }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 280px;
    }
    .sidebar.open { transform: translateX(0); box-shadow: 0 0 40px rgba(0,0,0,.5); }
    .main-wrap { margin-left: 0; }
    .mobile-header { display: flex; }
    .article-hero { padding: 48px 0 56px; }
    .article-body-section { padding: 32px 0 40px; }
    .recommend-grid { grid-template-columns: 1fr; }
    .faq-grid { grid-template-columns: 1fr; }
    .cta-inner { flex-direction: column; text-align: center; padding: 40px 24px; }
    .cta-actions { justify-content: center; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .container { padding: 0 18px; }
}

@media (max-width: 520px) {
    .article-hero h1 { font-size: 24px; }
    .article-card { padding: 22px 18px; }
    .cta-inner { padding: 32px 20px; }
    .section-head { flex-direction: column; align-items: flex-start; }
    .article-tags { flex-wrap: wrap; }
    .btn { padding: 11px 18px; font-size: 14px; }
}

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

/* roulang page: category3 */
/* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, sans-serif;
            background: #f2f5f9;
            color: #1e293b;
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        a:hover,
        a:focus {
            color: #2563eb;
        }
        img {
            max-width: 100%;
            display: block;
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: 1rem;
            border: none;
            outline: none;
        }
        i {
            font-style: normal;
        }

        /* ===== Design Variables ===== */
        :root {
            --primary: #2563eb;
            --primary-light: #3b82f6;
            --primary-dark: #1d4ed8;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --dark: #0b1322;
            --dark-2: #0f1c30;
            --panel: #ffffff;
            --bg: #f2f5f9;
            --text: #1e293b;
            --text-light: #64748b;
            --text-lighter: #94a3b8;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.1);
            --ease: all 0.3s ease;
            --sidebar-w: 240px;
            --spacer: 80px;
        }

        /* ===== Layout ===== */
        .app-shell {
            display: flex;
            min-height: 100vh;
            background: var(--bg);
        }
        .main {
            flex: 1;
            margin-left: var(--sidebar-w);
            min-width: 0;
            display: flex;
            flex-direction: column;
        }
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 32px;
            width: 100%;
        }

        /* ===== Sidebar Navigation ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-w);
            height: 100vh;
            background: linear-gradient(180deg, #0b1322 0%, #101d33 100%);
            z-index: 100;
            display: flex;
            flex-direction: column;
            padding: 28px 20px;
            box-shadow: 4px 0 24px rgba(0, 0, 0, 0.08);
        }
        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 0 8px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            margin-bottom: 24px;
        }
        .brand-icon {
            width: 44px;
            height: 44px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 20px;
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
        }
        .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 1px;
            white-space: nowrap;
        }
        .brand-tagline {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.45);
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-top: 2px;
        }
        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1;
        }
        .nav-label {
            font-size: 12px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.35);
            letter-spacing: 1.5px;
            padding: 0 12px;
            margin-bottom: 8px;
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 14px;
            border-radius: 12px;
            color: rgba(255, 255, 255, 0.68);
            font-size: 14.5px;
            font-weight: 500;
            transition: var(--ease);
            border: 1px solid transparent;
        }
        .nav-item i {
            width: 22px;
            text-align: center;
            font-size: 16px;
        }
        .nav-item:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            transform: translateX(4px);
        }
        .nav-item.active {
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.25), rgba(37, 99, 235, 0.1));
            border-color: rgba(59, 130, 246, 0.4);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
        }
        .nav-item.active i {
            color: var(--accent-light);
        }
        .sidebar-footer {
            padding: 16px 12px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.35);
            font-size: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-footer i {
            font-size: 14px;
        }

        /* ===== Mobile Nav Toggle ===== */
        .nav-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 120;
            width: 44px;
            height: 44px;
            background: var(--dark);
            color: #fff;
            border-radius: 12px;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            cursor: pointer;
            box-shadow: var(--shadow);
        }

        /* ===== Hero Banner ===== */
        .page-hero {
            background: linear-gradient(135deg, rgba(11, 19, 34, 0.92), rgba(15, 28, 48, 0.82)),
                url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            padding: 90px 0 80px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .page-hero::after {
            content: "";
            position: absolute;
            right: -60px;
            top: -60px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.25), transparent 65%);
            z-index: 0;
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: 100px;
            padding: 6px 18px;
            font-size: 13px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 20px;
            backdrop-filter: blur(8px);
        }
        .hero-badge i {
            color: var(--accent-light);
        }
        .page-hero h1 {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .page-hero h1 span {
            color: var(--accent-light);
        }
        .page-hero p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 620px;
            line-height: 1.7;
        }

        /* ===== Section Base ===== */
        .section {
            padding: var(--spacer) 0;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 100px;
            letter-spacing: 1px;
        }
        .section-title {
            font-size: 34px;
            font-weight: 700;
            color: var(--text);
            margin: 14px 0 12px;
            line-height: 1.3;
        }
        .section-desc {
            color: var(--text-light);
            font-size: 16px;
            max-width: 720px;
            line-height: 1.7;
        }
        .section-head {
            margin-bottom: 44px;
        }

        /* ===== Cards ===== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .service-card {
            background: var(--panel);
            border-radius: var(--radius);
            padding: 30px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--ease);
            position: relative;
            overflow: hidden;
        }
        .service-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--ease);
        }
        .service-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
            border-color: rgba(37, 99, 235, 0.25);
        }
        .service-card:hover::before {
            opacity: 1;
        }
        .service-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 20px;
            color: #fff;
        }
        .service-icon.blue {
            background: linear-gradient(135deg, #3b82f6, #2563eb);
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
        }
        .service-icon.gold {
            background: linear-gradient(135deg, #fbbf24, #f59e0b);
            box-shadow: 0 8px 20px rgba(245, 158, 11, 0.25);
        }
        .service-icon.indigo {
            background: linear-gradient(135deg, #6366f1, #4f46e5);
            box-shadow: 0 8px 20px rgba(79, 70, 229, 0.25);
        }
        .service-icon.teal {
            background: linear-gradient(135deg, #14b8a6, #0d9488);
            box-shadow: 0 8px 20px rgba(13, 148, 136, 0.25);
        }
        .service-card h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
        }
        .service-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.65;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            margin-top: 16px;
            transition: var(--ease);
        }
        .card-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* ===== Process ===== */
        .process-section {
            background: var(--dark);
            color: #fff;
        }
        .process-section .section-title {
            color: #fff;
        }
        .process-section .section-desc {
            color: rgba(255, 255, 255, 0.65);
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-top: 20px;
            position: relative;
        }
        .process-step {
            position: relative;
            padding: 32px 20px;
            border-radius: var(--radius);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--ease);
        }
        .process-step:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(59, 130, 246, 0.4);
        }
        .step-num {
            font-size: 44px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
            margin-bottom: 16px;
            opacity: 0.9;
        }
        .process-step h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.6;
        }

        /* ===== Content Cards ===== */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .content-card {
            background: var(--panel);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--ease);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }
        .content-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .content-card .cover {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .content-card .cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .content-card:hover .cover img {
            transform: scale(1.05);
        }
        .content-card .cover::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(0, 0, 0, 0.3));
        }
        .card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(11, 19, 34, 0.8);
            backdrop-filter: blur(8px);
            color: #fff;
            font-size: 12px;
            padding: 4px 14px;
            border-radius: 100px;
            font-weight: 500;
        }
        .content-body {
            padding: 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .content-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .content-body p {
            font-size: 14px;
            color: var(--text-light);
            flex: 1;
            line-height: 1.65;
        }
        .content-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 16px;
            padding-top: 14px;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-lighter);
        }
        .content-meta i {
            margin-right: 4px;
        }

        /* ===== Stats ===== */
        .stats-section {
            background: linear-gradient(135deg, #0b1322 0%, #101d33 100%);
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: "";
            position: absolute;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.15), transparent 60%);
            top: -100px;
            right: -100px;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            z-index: 1;
        }
        .stat-item {
            text-align: center;
            padding: 30px 20px;
            border-radius: var(--radius);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .stat-num {
            font-size: 42px;
            font-weight: 800;
            background: linear-gradient(135deg, #60a5fa, #fbbf24);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
            margin-bottom: 8px;
        }
        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--panel);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--ease);
        }
        .faq-item:hover {
            border-color: rgba(37, 99, 235, 0.3);
        }
        .faq-question {
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            background: transparent;
            transition: var(--ease);
        }
        .faq-question i {
            color: var(--primary);
            transition: transform 0.3s;
            font-size: 14px;
        }
        .faq-item.active .faq-question i {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            padding: 0 24px;
        }
        .faq-answer p {
            padding: 0 0 20px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        /* ===== CTA / Contact ===== */
        .cta-section {
            background: var(--panel);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .cta-wrapper {
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            gap: 56px;
            align-items: center;
        }
        .cta-info h2 {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 16px;
        }
        .cta-info p {
            color: var(--text-light);
            line-height: 1.7;
            font-size: 16px;
            margin-bottom: 24px;
        }
        .contact-methods {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .contact-method {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 18px;
            border-radius: 14px;
            background: var(--bg);
            border: 1px solid var(--border);
            transition: var(--ease);
        }
        .contact-method:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .contact-method i {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary);
            font-size: 16px;
        }
        .contact-method .method-info {
            flex: 1;
        }
        .contact-method .method-label {
            font-size: 13px;
            color: var(--text-lighter);
        }
        .contact-method .method-value {
            font-size: 15px;
            color: var(--text);
            font-weight: 600;
        }
        .contact-form {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px;
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
        }
        .form-control {
            width: 100%;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            background: #fff;
            border: 1px solid var(--border);
            transition: var(--ease);
            font-size: 15px;
        }
        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
            outline: none;
        }
        textarea.form-control {
            resize: vertical;
            min-height: 100px;
        }
        .btn-submit {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            transition: var(--ease);
            box-shadow: 0 6px 18px rgba(37, 99, 235, 0.25);
            border: none;
            width: 100%;
            justify-content: center;
        }
        .btn-submit:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(37, 99, 235, 0.35);
        }
        .btn-submit:active {
            transform: translateY(0);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .brand-icon {
            width: 46px;
            height: 46px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand h3 {
            color: #fff;
            font-size: 22px;
            margin-bottom: 10px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-links,
        .footer-contact {
            display: flex;
            flex-direction: column;
        }
        .footer-links h4,
        .footer-contact h4 {
            color: #fff;
            font-size: 16px;
            margin-bottom: 18px;
            font-weight: 600;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            padding: 5px 0;
            transition: var(--ease);
        }
        .footer-links a:hover {
            color: var(--accent-light);
            padding-left: 6px;
        }
        .footer-contact p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-contact i {
            color: var(--accent-light);
            width: 18px;
        }
        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom span {
            color: rgba(255, 255, 255, 0.55);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            :root {
                --sidebar-w: 220px;
                --spacer: 60px;
            }
            .container {
                padding: 0 24px;
            }
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .content-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-wrapper {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --sidebar-w: 0px;
                --spacer: 48px;
            }
            .sidebar {
                transform: translateX(-100%);
                transition: transform 0.35s ease;
                width: 260px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .nav-toggle {
                display: flex;
            }
            .main {
                margin-left: 0;
            }
            .page-hero {
                padding: 80px 0 60px;
                margin-top: 0;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .section-title {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }
            .cards-grid {
                grid-template-columns: 1fr;
            }
            .content-grid {
                grid-template-columns: 1fr;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .cta-wrapper {
                grid-template-columns: 1fr;
            }
            .contact-form {
                padding: 24px;
            }
            .page-hero h1 {
                font-size: 26px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2b6de8;
            --primary-dark: #1a4fc4;
            --primary-light: #eaf1fe;
            --accent: #00b8c6;
            --bg-body: #f4f6fb;
            --bg-card: #ffffff;
            --bg-sidebar: #0f1830;
            --bg-deep: #101c33;
            --text-main: #1f2937;
            --text-weak: #6b7280;
            --text-invert: #f8fafc;
            --border-color: #e5e9f2;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, .06);
            --shadow-md: 0 8px 24px rgba(23, 37, 84, .08);
            --shadow-lg: 0 18px 44px rgba(23, 37, 84, .14);
            --transition: .25s ease;
            --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            --sidebar-width: 248px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease;
        }
        ul,
        ol {
            list-style: none;
        }
        button {
            font: inherit;
            border: none;
            cursor: pointer;
            background: none;
        }
        input {
            font: inherit;
        }

        .container {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .app-shell {
            display: flex;
            min-height: 100vh;
        }

        /* ===== Sidebar ===== */
        .sidebar {
            width: var(--sidebar-width);
            background: var(--bg-sidebar);
            color: var(--text-invert);
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform .3s ease;
        }
        .sidebar.open {
            transform: translateX(0) !important;
        }
        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 28px 22px 22px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }
        .logo-mark {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            box-shadow: 0 6px 18px rgba(43, 109, 232, .35);
            flex-shrink: 0;
        }
        .sidebar-logo h2 {
            font-size: 19px;
            font-weight: 700;
            letter-spacing: .5px;
            white-space: nowrap;
        }
        .sidebar-nav {
            padding: 20px 14px;
            display: flex;
            flex-direction: column;
            gap: 6px;
            flex: 1;
        }
        .nav-label {
            font-size: 11px;
            letter-spacing: 2px;
            color: rgba(255, 255, 255, .35);
            padding: 0 12px;
            margin-bottom: 8px;
            text-transform: uppercase;
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            border-radius: 10px;
            color: rgba(255, 255, 255, .68);
            font-size: 15px;
            font-weight: 500;
            transition: background .2s, color .2s, transform .2s, box-shadow .2s;
        }
        .nav-item i {
            width: 20px;
            text-align: center;
            font-size: 16px;
        }
        .nav-item:hover {
            background: rgba(255, 255, 255, .08);
            color: #fff;
            transform: translateX(2px);
        }
        .nav-item.active {
            background: linear-gradient(90deg, var(--primary), #3f7ceb);
            color: #fff;
            box-shadow: 0 6px 18px rgba(43, 109, 232, .35);
        }
        .sidebar-foot {
            padding: 18px 22px;
            border-top: 1px solid rgba(255, 255, 255, .08);
            font-size: 13px;
            color: rgba(255, 255, 255, .35);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-foot .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #22c55e;
            box-shadow: 0 0 0 3px rgba(34, 197, 94, .2);
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: .6;
                transform: scale(1.2);
            }
        }

        /* ===== Main Area ===== */
        .main-area {
            flex: 1;
            margin-left: var(--sidebar-width);
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        /* Mobile Header */
        .mobile-header {
            display: none;
            background: var(--bg-sidebar);
            color: #fff;
            padding: 0 20px;
            height: 62px;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 999;
            box-shadow: 0 4px 16px rgba(0, 0, 0, .15);
        }
        .mobile-header .mobile-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 17px;
        }
        .mobile-header .mobile-logo .logo-mark {
            width: 34px;
            height: 34px;
            font-size: 17px;
        }
        .mobile-menu-btn {
            font-size: 22px;
            color: #fff;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            transition: background .2s;
        }
        .mobile-menu-btn:hover {
            background: rgba(255, 255, 255, .08);
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, .5);
            z-index: 999;
            backdrop-filter: blur(2px);
        }
        .sidebar-overlay.show {
            display: block;
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 72px 48px;
            background-image: linear-gradient(100deg, rgba(15, 24, 48, .92), rgba(15, 24, 48, .55)), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            color: var(--text-invert);
            border-radius: 0;
            overflow: hidden;
        }
        .page-banner .banner-inner {
            position: relative;
            z-index: 2;
        }
        .page-banner .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .18);
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: .5px;
            margin-bottom: 18px;
            backdrop-filter: blur(6px);
        }
        .page-banner h1 {
            font-size: 40px;
            line-height: 1.25;
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }
        .page-banner p {
            font-size: 16px;
            max-width: 640px;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 28px;
            line-height: 1.8;
        }
        .banner-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: 40px;
            font-size: 15px;
            font-weight: 600;
            transition: all .25s ease;
            border: 1px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 20px rgba(43, 109, 232, .3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(43, 109, 232, .4);
        }
        .btn-outline {
            background: rgba(255, 255, 255, .1);
            color: #fff;
            border-color: rgba(255, 255, 255, .25);
            backdrop-filter: blur(4px);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, .2);
            transform: translateY(-2px);
        }
        .breadcrumb {
            margin-top: 20px;
            font-size: 13px;
            color: rgba(255, 255, 255, .55);
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb i {
            font-size: 11px;
            opacity: .7;
        }

        /* ===== Section Base ===== */
        .section {
            padding: 60px 48px;
        }
        .section-header {
            margin-bottom: 34px;
            max-width: 760px;
        }
        .section-eyebrow {
            display: inline-block;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 2px;
            color: var(--primary);
            text-transform: uppercase;
            margin-bottom: 10px;
            background: var(--primary-light);
            padding: 4px 14px;
            border-radius: 20px;
        }
        .section-header h2 {
            font-size: 30px;
            line-height: 1.3;
            color: var(--text-main);
            font-weight: 800;
        }
        .section-header p {
            color: var(--text-weak);
            margin-top: 10px;
            font-size: 15px;
        }

        /* ===== Tag Filter ===== */
        .tag-filter {
            margin-bottom: 34px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            padding: 6px 0;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 30px;
            background: #fff;
            border: 1px solid var(--border-color);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-weak);
            transition: all .2s ease;
            cursor: default;
        }
        .tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        .tag.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(43, 109, 232, .3);
        }

        /* ===== Cards Grid ===== */
        .grid-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: transform .3s, box-shadow .3s;
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .card-media {
            position: relative;
            height: 196px;
            overflow: hidden;
        }
        .card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .45s ease;
        }
        .card:hover .card-media img {
            transform: scale(1.05);
        }
        .card-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 55%, rgba(15, 23, 42, .35));
            pointer-events: none;
        }
        .card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
            background: rgba(15, 23, 42, .6);
            backdrop-filter: blur(6px);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 20px;
        }
        .card-body {
            padding: 22px 22px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .card-body h3 {
            font-size: 17px;
            line-height: 1.5;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .card-body h3 a {
            color: var(--text-main);
            transition: color .2s;
        }
        .card-body h3 a:hover {
            color: var(--primary);
        }
        .card-body p {
            font-size: 13px;
            color: var(--text-weak);
            line-height: 1.7;
            flex: 1;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-top: 18px;
            font-size: 12px;
            color: var(--text-weak);
            border-top: 1px solid var(--border-color);
            padding-top: 14px;
        }
        .card-meta i {
            font-size: 13px;
            opacity: .8;
        }
        .card-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        /* ===== Rank List ===== */
        .rank-wrap {
            background: linear-gradient(135deg, #101c33, #17254a);
            border-radius: var(--radius-lg);
            padding: 44px;
            color: #fff;
        }
        .rank-wrap .section-header h2 {
            color: #fff;
        }
        .rank-wrap .section-header p {
            color: rgba(255, 255, 255, .6);
        }
        .rank-wrap .section-eyebrow {
            background: rgba(255, 255, 255, .1);
            color: #8fb7ff;
        }
        .rank-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 8px;
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 18px 20px;
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: var(--radius-md);
            transition: background .25s, transform .25s;
        }
        .rank-item:hover {
            background: rgba(255, 255, 255, .12);
            transform: translateX(4px);
        }
        .rank-num {
            width: 38px;
            height: 38px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: rgba(255, 255, 255, .1);
            font-size: 16px;
            font-weight: 800;
            color: #93b5df;
            transition: all .25s;
        }
        .rank-item:nth-child(1) .rank-num {
            background: linear-gradient(135deg, #f6a83b, #f7c868);
            color: #1a1a2e;
        }
        .rank-item:nth-child(2) .rank-num {
            background: linear-gradient(135deg, #b6c3d9, #e2e8f2);
            color: #1a1a2e;
        }
        .rank-item:nth-child(3) .rank-num {
            background: linear-gradient(135deg, #c07a46, #dda174);
            color: #1a1a2e;
        }
        .rank-item:hover .rank-num {
            transform: scale(1.08);
        }
        .rank-info {
            flex: 1;
            min-width: 0;
        }
        .rank-info h3 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .rank-info p {
            font-size: 12px;
            color: rgba(255, 255, 255, .45);
            margin-top: 3px;
        }
        .rank-hot {
            font-size: 12px;
            color: #f6a83b;
            display: flex;
            align-items: center;
            gap: 5px;
            white-space: nowrap;
        }

        /* ===== Stats Band ===== */
        .stats-band {
            background: linear-gradient(120deg, #0f1830, #14213d);
            border-radius: var(--radius-lg);
            padding: 50px 54px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .stats-band::before {
            content: "";
            position: absolute;
            top: -40px;
            right: -30px;
            width: 180px;
            height: 180px;
            background: radial-gradient(circle, rgba(43, 109, 232, .3), transparent 70%);
            pointer-events: none;
        }
        .stat-item {
            text-align: center;
            padding: 12px;
            position: relative;
            z-index: 1;
        }
        .stat-icon {
            font-size: 30px;
            margin-bottom: 14px;
            color: #6ea2ff;
        }
        .stat-num {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, .55);
            margin-top: 6px;
        }

        /* ===== Method Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 30px 24px 28px;
            position: relative;
            transition: box-shadow .25s, transform .25s;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-num {
            font-size: 46px;
            font-weight: 800;
            color: transparent;
            -webkit-text-stroke: 2px var(--primary);
            line-height: 1;
            margin-bottom: 14px;
            opacity: .65;
        }
        .step-card h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 13px;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: box-shadow .25s, border-color .25s;
        }
        .faq-item.active {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            padding: 20px 22px;
            text-align: left;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            transition: color .2s;
        }
        .faq-question i {
            font-size: 14px;
            color: var(--primary);
            transition: transform .3s;
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }
        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.8;
            border-top: 1px solid var(--border-color);
            margin: 0 22px;
            padding: 16px 0 20px;
        }

        /* ===== CTA ===== */
        .cta-band {
            background: linear-gradient(105deg, #2b6de8, #00b8c6);
            border-radius: var(--radius-lg);
            padding: 52px 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-band::after {
            content: "";
            position: absolute;
            right: -50px;
            top: -50px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .1);
            pointer-events: none;
        }
        .cta-band .cta-info {
            position: relative;
            z-index: 1;
        }
        .cta-band h2 {
            font-size: 26px;
            font-weight: 800;
            margin-bottom: 8px;
        }
        .cta-band p {
            font-size: 14px;
            opacity: .9;
        }
        .cta-btns {
            display: flex;
            gap: 14px;
            flex-shrink: 0;
            position: relative;
            z-index: 1;
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 20px rgba(0, 0, 0, .12);
        }
        .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(0, 0, 0, .18);
        }
        .btn-ghost-light {
            background: rgba(255, 255, 255, .12);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, .3);
        }
        .btn-ghost-light:hover {
            background: rgba(255, 255, 255, .2);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .footer {
            background: #0b1120;
            color: rgba(255, 255, 255, .6);
            padding: 56px 24px 28px;
            margin-top: auto;
        }
        .footer .container {
            max-width: 1180px;
            margin: 0 auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 36px;
        }
        .footer-brand h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin: 14px 0 8px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-brand p {
            font-size: 13px;
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links h4,
        .footer-contact h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, .55);
            transition: color .2s, transform .2s;
        }
        .footer-links a:hover {
            color: #fff;
            transform: translateX(2px);
        }
        .footer-contact p {
            font-size: 14px;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-contact i {
            width: 18px;
            text-align: center;
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding-top: 22px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, .35);
        }
        .footer-bottom span {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-cards {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-band {
                grid-template-columns: repeat(2, 1fr);
                padding: 40px 30px;
            }
            .section {
                padding: 48px 32px;
            }
            .page-banner {
                padding: 56px 36px;
            }
            .rank-wrap {
                padding: 32px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
                width: 280px;
                box-shadow: 4px 0 30px rgba(0, 0, 0, .25);
            }
            .main-area {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
            .page-banner {
                padding: 46px 24px;
            }
            .page-banner h1 {
                font-size: 32px;
            }
            .section {
                padding: 40px 24px;
            }
            .faq-grid {
                grid-template-columns: 1fr;
            }
            .cta-band {
                flex-direction: column;
                text-align: center;
                padding: 40px 30px;
            }
            .cta-btns {
                justify-content: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .rank-wrap {
                padding: 28px 22px;
            }
            .rank-item {
                flex-wrap: wrap;
            }
            .cards-grid {
                grid-template-columns: 1fr;
            }
            .grid-cards {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 520px) {
            .page-banner h1 {
                font-size: 26px;
            }
            .page-banner p {
                font-size: 14px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .section {
                padding: 36px 18px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .stats-band {
                grid-template-columns: 1fr;
                gap: 18px;
                padding: 32px 20px;
            }
            .stat-num {
                font-size: 32px;
            }
            .grid-cards {
                grid-template-columns: 1fr;
            }
            .banner-btns {
                flex-direction: column;
                align-items: stretch;
            }
            .btn {
                justify-content: center;
            }
            .rank-item {
                gap: 12px;
                padding: 14px 16px;
            }
            .rank-info h3 {
                font-size: 14px;
            }
            .card-media {
                height: 170px;
            }
            .cta-band {
                padding: 30px 20px;
            }
            .cta-band h2 {
                font-size: 20px;
            }
            .cta-btns {
                flex-direction: column;
                align-items: stretch;
            }
            .footer {
                padding: 40px 18px 20px;
            }
        }