/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f2b4a;
            --primary-light: #1a4a7a;
            --primary-dark: #091e33;
            --accent: #e63946;
            --accent-hover: #c52d39;
            --accent-light: #ffe0e0;
            --gold: #f4a261;
            --gold-light: #fff3e0;
            --bg: #f5f7fa;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0f2b4a;
            --text: #1d2a3a;
            --text-light: #5a6a7a;
            --text-white: #f0f4f8;
            --border: #e2e8f0;
            --border-light: #f0f2f5;
            --shadow-sm: 0 2px 8px rgba(15, 43, 74, 0.06);
            --shadow: 0 4px 20px rgba(15, 43, 74, 0.08);
            --shadow-lg: 0 12px 40px rgba(15, 43, 74, 0.12);
            --shadow-accent: 0 6px 24px rgba(230, 57, 70, 0.30);
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --section-gap: 80px;
            --section-gap-mobile: 48px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        a:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--primary);
        }
        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.35rem;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 0.75rem;
            color: var(--text-light);
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: var(--section-gap) 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2.2rem;
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p {
            font-size: 1.1rem;
            max-width: 600px;
            margin: 12px auto 0;
            color: var(--text-light);
        }
        .text-center {
            text-align: center;
        }
        .text-accent {
            color: var(--accent);
        }

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 43, 74, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            height: var(--header-height);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .header.scrolled {
            background: rgba(9, 30, 51, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.20);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
        }
        .logo i {
            color: var(--accent);
            font-size: 1.6rem;
        }
        .logo span {
            background: linear-gradient(135deg, #fff 60%, var(--gold));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover span {
            background: linear-gradient(135deg, var(--accent) 40%, var(--gold));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            color: rgba(255, 255, 255, 0.80);
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            position: relative;
        }
        .nav a:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }
        .nav a.active {
            color: #fff;
            background: rgba(230, 57, 70, 0.20);
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }
        .nav-cta {
            margin-left: 12px;
            background: var(--accent);
            color: #fff !important;
            padding: 10px 28px !important;
            border-radius: 50px !important;
            font-weight: 600 !important;
            box-shadow: 0 4px 16px rgba(230, 57, 70, 0.35);
            transition: all var(--transition) !important;
        }
        .nav-cta:hover {
            background: var(--accent-hover) !important;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(230, 57, 70, 0.45) !important;
            color: #fff !important;
        }
        .nav-cta:active {
            transform: translateY(0);
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 3px;
            background: #fff;
            border-radius: 4px;
            transition: all var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 6px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -6px);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 92vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-dark);
            padding-top: var(--header-height);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.30;
            transform: scale(1.05);
            animation: heroZoom 20s ease-in-out infinite alternate;
        }
        @keyframes heroZoom {
            0% {
                transform: scale(1.05);
            }
            100% {
                transform: scale(1.15);
            }
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(9, 30, 51, 0.88) 40%, rgba(15, 43, 74, 0.70) 100%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 60px 24px;
            max-width: 900px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(230, 57, 70, 0.18);
            border: 1px solid rgba(230, 57, 70, 0.30);
            color: var(--accent);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 28px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.8rem;
        }
        .hero h1 {
            font-size: 3.4rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--accent), var(--gold));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 680px;
            margin: 0 auto 36px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 16px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #fff;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            box-shadow: 0 6px 24px rgba(230, 57, 70, 0.35);
            transition: all var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(230, 57, 70, 0.45);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(-1px);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: #fff;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255, 255, 255, 0.30);
            transition: all var(--transition);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            background: rgba(230, 57, 70, 0.12);
            color: #fff;
            transform: translateY(-3px);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
            margin-top: 52px;
            padding-top: 36px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat .number {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .hero-stat .number .accent {
            color: var(--accent);
        }
        .hero-stat .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 4px;
            letter-spacing: 0.3px;
        }

        /* ===== Intro / 平台介绍 ===== */
        .intro {
            background: var(--bg-white);
        }
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .intro-image img {
            width: 100%;
            height: 400px;
            object-fit: cover;
            display: block;
        }
        .intro-image .play-badge {
            position: absolute;
            bottom: 20px;
            left: 20px;
            background: rgba(0, 0, 0, 0.65);
            backdrop-filter: blur(8px);
            color: #fff;
            padding: 10px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            display: flex;
            align-items: center;
            gap: 8px;
            border: 1px solid rgba(255, 255, 255, 0.12);
        }
        .intro-content h2 {
            margin-bottom: 20px;
        }
        .intro-content p {
            font-size: 1.05rem;
            margin-bottom: 16px;
        }
        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-top: 24px;
        }
        .intro-feature {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 16px;
            background: var(--bg);
            border-radius: var(--radius-sm);
            border-left: 3px solid var(--accent);
        }
        .intro-feature i {
            color: var(--accent);
            font-size: 1.2rem;
            margin-top: 2px;
            flex-shrink: 0;
        }
        .intro-feature h4 {
            font-size: 0.95rem;
            margin-bottom: 4px;
            color: var(--primary);
        }
        .intro-feature p {
            font-size: 0.85rem;
            margin-bottom: 0;
            color: var(--text-light);
        }

        /* ===== Category / 分类入口 ===== */
        .category {
            background: var(--bg);
        }
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }
        .category-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 36px 28px 32px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--gold));
            opacity: 0;
            transition: opacity var(--transition);
        }
        .category-card:hover::before {
            opacity: 1;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .category-card .icon {
            width: 64px;
            height: 64px;
            background: var(--accent-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: var(--accent);
            transition: all var(--transition);
        }
        .category-card:hover .icon {
            background: var(--accent);
            color: #fff;
            transform: scale(1.05);
        }
        .category-card h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
        }
        .category-card p {
            font-size: 0.92rem;
            margin-bottom: 18px;
            color: var(--text-light);
        }
        .category-card .tag {
            display: inline-block;
            background: var(--bg);
            color: var(--text-light);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 500;
            gap: 6px;
        }
        .category-card .tag i {
            margin-right: 4px;
            color: var(--accent);
        }
        .category-card .btn-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-weight: 600;
            font-size: 0.95rem;
            margin-top: 12px;
            transition: gap var(--transition);
        }
        .category-card .btn-link:hover {
            gap: 12px;
            color: var(--accent-hover);
        }

        /* ===== Latest / 最新资讯 ===== */
        .latest {
            background: var(--bg-white);
        }
        .latest-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 28px;
        }
        .latest-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .latest-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .latest-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .latest-card .card-body {
            padding: 24px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .latest-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .latest-card .card-meta .badge {
            background: var(--accent-light);
            color: var(--accent);
            padding: 2px 12px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.75rem;
        }
        .latest-card .card-meta .badge.gold {
            background: var(--gold-light);
            color: #b87c3a;
        }
        .latest-card .card-meta .badge.blue {
            background: #e0edff;
            color: #1a4a7a;
        }
        .latest-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            line-height: 1.4;
            flex: 1;
        }
        .latest-card h3 a {
            color: var(--primary);
            transition: color var(--transition);
        }
        .latest-card h3 a:hover {
            color: var(--accent);
        }
        .latest-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .latest-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
            margin-top: auto;
        }
        .latest-card .card-footer .date {
            font-size: 0.8rem;
            color: var(--text-light);
        }
        .latest-card .card-footer .read-more {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent);
            display: flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition);
        }
        .latest-card .card-footer .read-more:hover {
            gap: 10px;
        }
        .latest-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            background: var(--bg);
            border-radius: var(--radius);
            color: var(--text-light);
        }
        .latest-empty i {
            font-size: 3rem;
            color: var(--border);
            margin-bottom: 16px;
        }

        /* ===== Data / 数据统计 ===== */
        .data {
            background: var(--primary-dark);
            position: relative;
            overflow: hidden;
        }
        .data::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.10;
        }
        .data .container {
            position: relative;
            z-index: 1;
        }
        .data .section-title h2 {
            color: #fff;
        }
        .data .section-title h2::after {
            background: var(--accent);
        }
        .data .section-title p {
            color: rgba(255, 255, 255, 0.60);
        }
        .data-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 32px;
            margin-top: 40px;
        }
        .data-item {
            text-align: center;
            padding: 32px 20px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(4px);
            transition: background var(--transition), transform var(--transition);
        }
        .data-item:hover {
            background: rgba(255, 255, 255, 0.10);
            transform: translateY(-4px);
        }
        .data-item .number {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .data-item .number .accent {
            color: var(--accent);
        }
        .data-item .number .gold {
            color: var(--gold);
        }
        .data-item .label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.60);
            margin-top: 8px;
            font-weight: 500;
        }
        .data-item .sublabel {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.35);
            margin-top: 4px;
        }

        /* ===== Process / 服务流程 ===== */
        .process {
            background: var(--bg-white);
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            position: relative;
            counter-reset: step;
        }
        .process-steps::before {
            content: '';
            position: absolute;
            top: 48px;
            left: 10%;
            right: 10%;
            height: 3px;
            background: var(--border);
            z-index: 0;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 0 10px;
        }
        .process-step .step-num {
            width: 56px;
            height: 56px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 800;
            margin: 0 auto 18px;
            box-shadow: 0 4px 16px rgba(15, 43, 74, 0.20);
            border: 4px solid var(--bg-white);
            transition: all var(--transition);
            counter-increment: step;
        }
        .process-step:hover .step-num {
            background: var(--accent);
            transform: scale(1.08);
            box-shadow: 0 8px 28px rgba(230, 57, 70, 0.30);
        }
        .process-step .step-num::after {
            content: counter(step);
        }
        .process-step h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .process-step p {
            font-size: 0.88rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq {
            background: var(--bg);
        }
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-item summary {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            list-style: none;
            transition: color var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary .icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 0.85rem;
            transition: all var(--transition);
        }
        .faq-item[open] summary {
            color: var(--accent);
        }
        .faq-item[open] summary .icon {
            background: var(--accent);
            color: #fff;
            transform: rotate(180deg);
        }
        .faq-item .answer {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.8;
        }
        .faq-item .answer p:last-child {
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta {
            background: var(--primary-dark);
            position: relative;
            overflow: hidden;
        }
        .cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.10;
        }
        .cta .container {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 80px 24px;
        }
        .cta h2 {
            color: #fff;
            font-size: 2.4rem;
            margin-bottom: 16px;
        }
        .cta p {
            color: rgba(255, 255, 255, 0.70);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta .btn-primary {
            font-size: 1.1rem;
            padding: 16px 44px;
        }
        .cta .btn-outline {
            border-color: rgba(255, 255, 255, 0.25);
        }

        /* ===== Footer ===== */
        .footer {
            background: #091e33;
            color: rgba(255, 255, 255, 0.65);
            padding: 48px 0 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .logo {
            font-size: 1.3rem;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.50);
            max-width: 300px;
            margin-bottom: 16px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.50);
            font-size: 1rem;
            transition: all var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.04);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            transform: translateY(-3px);
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.50);
            font-size: 0.9rem;
            transition: color var(--transition), padding-left var(--transition);
            display: inline-block;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        .footer-bottom .legal {
            display: flex;
            gap: 20px;
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            width: 48px;
            height: 48px;
            background: var(--accent);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 20px rgba(230, 57, 70, 0.30);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--accent-hover);
            transform: translateY(-4px);
            box-shadow: 0 8px 30px rgba(230, 57, 70, 0.45);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 2.8rem;
            }
            .intro-grid {
                gap: 40px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .process-steps::before {
                display: none;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-gap: var(--section-gap-mobile);
                --header-height: 64px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .section-title h2 {
                font-size: 1.6rem;
            }
            .hero {
                min-height: 70vh;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stat .number {
                font-size: 1.5rem;
            }
            .nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(9, 30, 51, 0.98);
                flex-direction: column;
                padding: 20px 24px 28px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                gap: 4px;
                backdrop-filter: blur(12px);
            }
            .nav.open {
                display: flex;
            }
            .nav a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav a.active::after {
                display: none;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
                justify-content: center;
            }
            .hamburger {
                display: flex;
            }
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .intro-image img {
                height: 260px;
            }
            .intro-features {
                grid-template-columns: 1fr;
            }
            .latest-grid {
                grid-template-columns: 1fr;
            }
            .data-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .data-item .number {
                font-size: 2rem;
            }
            .process-steps {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta h2 {
                font-size: 1.6rem;
            }
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline {
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .data-grid {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .latest-card .card-img {
                height: 160px;
            }
            .faq-item summary {
                padding: 16px 18px;
                font-size: 0.92rem;
            }
            .faq-item .answer {
                padding: 0 18px 16px;
            }
            .cta .container {
                padding: 48px 16px;
            }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #2b4d7a;
            --accent: #f4a261;
            --accent-light: #f9c78a;
            --bg: #0f0f1a;
            --bg-card: #1a1a2e;
            --bg-card-hover: #222240;
            --bg-soft: #16162a;
            --text: #f1f1f1;
            --text-light: #b0b0c8;
            --text-muted: #7a7a9e;
            --border: #2a2a4a;
            --border-light: #3a3a5a;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 30px rgba(230, 57, 70, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }
        a { color: var(--accent); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul { list-style: none; }
        ::selection { background: var(--primary); color: #fff; }

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

        /* ===== Typography ===== */
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.25; color: var(--text); }
        h1 { font-size: 2.6rem; letter-spacing: -0.02em; }
        h2 { font-size: 2rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1em; color: var(--text-light); }
        .text-center { text-align: center; }
        .text-muted { color: var(--text-muted); }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 12px 28px; border-radius: var(--radius-sm);
            font-weight: 600; font-size: 0.95rem;
            border: none; cursor: pointer;
            transition: var(--transition);
            background: var(--primary); color: #fff;
            text-decoration: none; line-height: 1.4;
        }
        .btn:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-glow); }
        .btn:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; }
        .btn-outline {
            background: transparent; border: 2px solid var(--border-light);
            color: var(--text);
        }
        .btn-outline:hover { border-color: var(--primary); color: var(--primary); background: rgba(230, 57, 70, 0.08); }
        .btn-sm { padding: 8px 18px; font-size: 0.85rem; border-radius: var(--radius-xs); }
        .btn .fa-arrow-right { transition: var(--transition); }
        .btn:hover .fa-arrow-right { transform: translateX(4px); }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block; padding: 4px 14px;
            border-radius: 20px; font-size: 0.78rem; font-weight: 600;
            background: rgba(230, 57, 70, 0.15); color: var(--primary-light);
            letter-spacing: 0.3px;
        }
        .badge-secondary { background: rgba(29, 53, 87, 0.5); color: var(--accent); }
        .badge-soft { background: rgba(244, 162, 97, 0.15); color: var(--accent); }

        /* ===== Section Spacing ===== */
        .section { padding: 80px 0; }
        .section-header { margin-bottom: 48px; }
        .section-header h2 { margin-bottom: 12px; }
        .section-header p { max-width: 600px; margin: 0 auto; font-size: 1.05rem; }

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed; top: 0; left: 0; right: 0;
            height: var(--nav-height);
            background: rgba(15, 15, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: var(--transition);
        }
        .header .container {
            display: flex; align-items: center; justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex; align-items: center; gap: 10px;
            font-size: 1.4rem; font-weight: 800; color: var(--text);
            text-decoration: none;
        }
        .logo i { color: var(--primary); font-size: 1.5rem; }
        .logo span { background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav { display: flex; align-items: center; gap: 32px; }
        .nav a {
            color: var(--text-light); font-weight: 500; font-size: 0.92rem;
            position: relative; padding: 4px 0;
            transition: var(--transition);
            text-decoration: none;
        }
        .nav a::after {
            content: ''; position: absolute; bottom: -2px; left: 0;
            width: 0; height: 2px; background: var(--primary);
            transition: var(--transition); border-radius: 2px;
        }
        .nav a:hover { color: var(--text); }
        .nav a:hover::after { width: 100%; }
        .nav a.active { color: var(--text); }
        .nav a.active::after { width: 100%; }
        .nav a.nav-cta {
            padding: 10px 24px; border-radius: var(--radius-sm);
            background: var(--primary); color: #fff !important;
            font-weight: 600;
        }
        .nav a.nav-cta::after { display: none; }
        .nav a.nav-cta:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-glow); }

        /* Mobile menu toggle */
        .menu-toggle {
            display: none; background: none; border: none;
            color: var(--text); font-size: 1.5rem; cursor: pointer;
            padding: 8px;
        }
        .menu-toggle:focus-visible { outline: 2px solid var(--primary); }

        /* ===== Hero / Banner (内页小Banner) ===== */
        .page-banner {
            margin-top: var(--nav-height);
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--bg) 0%, var(--bg-card) 50%, var(--bg-soft) 100%);
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border);
        }
        .page-banner::before {
            content: '';
            position: absolute; top: -50%; right: -20%;
            width: 500px; height: 500px;
            background: radial-gradient(circle, rgba(230,57,70,0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-banner .container { position: relative; z-index: 1; }
        .page-banner h1 { font-size: 2.2rem; margin-bottom: 12px; }
        .page-banner .meta {
            display: flex; align-items: center; gap: 20px;
            color: var(--text-muted); font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .page-banner .meta span { display: flex; align-items: center; gap: 6px; }
        .page-banner .meta i { color: var(--primary); }

        /* ===== Article Content ===== */
        .article-main { padding: 60px 0 80px; }
        .article-layout {
            display: grid; grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 40px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }
        .article-body .featured-image {
            width: 100%; border-radius: var(--radius-sm);
            margin-bottom: 32px; object-fit: cover;
            max-height: 480px;
        }
        .article-body .content-body {
            font-size: 1.05rem; line-height: 1.85;
            color: var(--text-light);
        }
        .article-body .content-body p { margin-bottom: 1.4em; }
        .article-body .content-body h2, .article-body .content-body h3 { color: var(--text); margin-top: 1.6em; margin-bottom: 0.6em; }
        .article-body .content-body ul, .article-body .content-body ol { padding-left: 1.5em; margin-bottom: 1.4em; color: var(--text-light); }
        .article-body .content-body li { margin-bottom: 0.4em; }
        .article-body .content-body img { border-radius: var(--radius-sm); margin: 1.2em 0; }
        .article-body .content-body blockquote {
            border-left: 4px solid var(--primary); padding: 16px 20px;
            background: rgba(230,57,70,0.06); border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
            margin: 1.4em 0; color: var(--text-light); font-style: italic;
        }
        .article-body .content-body a { color: var(--primary-light); text-decoration: underline; }
        .article-body .content-body a:hover { color: var(--accent); }

        /* Tags & Share */
        .article-footer-bar {
            display: flex; align-items: center; justify-content: space-between;
            margin-top: 40px; padding-top: 24px;
            border-top: 1px solid var(--border);
            flex-wrap: wrap; gap: 16px;
        }
        .article-tags { display: flex; gap: 8px; flex-wrap: wrap; }
        .article-tags .badge { cursor: default; }
        .article-share { display: flex; align-items: center; gap: 12px; }
        .article-share span { color: var(--text-muted); font-size: 0.9rem; }
        .article-share a {
            width: 36px; height: 36px; border-radius: 50%;
            background: var(--bg-soft); border: 1px solid var(--border);
            display: flex; align-items: center; justify-content: center;
            color: var(--text-light); transition: var(--transition);
        }
        .article-share a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex; flex-direction: column; gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-card); border-radius: var(--radius);
            padding: 28px; border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h3 {
            font-size: 1.1rem; margin-bottom: 16px;
            display: flex; align-items: center; gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-list { display: flex; flex-direction: column; gap: 12px; }
        .sidebar-list a {
            display: flex; align-items: center; gap: 12px;
            padding: 10px 0; border-bottom: 1px solid var(--border);
            color: var(--text-light); transition: var(--transition);
            font-size: 0.92rem;
        }
        .sidebar-list a:last-child { border-bottom: none; }
        .sidebar-list a:hover { color: var(--primary-light); padding-left: 8px; }
        .sidebar-list a .fa-chevron-right { color: var(--primary); font-size: 0.7rem; flex-shrink: 0; }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--secondary), var(--bg-card));
            border: 1px solid var(--border-light);
            text-align: center;
        }
        .sidebar-cta p { font-size: 0.95rem; margin-bottom: 16px; }
        .sidebar-cta .btn { width: 100%; justify-content: center; }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center; padding: 60px 20px;
            background: var(--bg-card); border-radius: var(--radius);
            border: 1px solid var(--border);
        }
        .not-found-box i { font-size: 3rem; color: var(--text-muted); margin-bottom: 20px; }
        .not-found-box h2 { margin-bottom: 12px; }
        .not-found-box p { margin-bottom: 24px; }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border);
            padding: 60px 0 30px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid; grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px; margin-bottom: 40px;
        }
        .footer-brand .logo { margin-bottom: 12px; }
        .footer-brand p { color: var(--text-muted); font-size: 0.9rem; max-width: 360px; line-height: 1.7; }
        .footer-social { display: flex; gap: 12px; margin-top: 16px; }
        .footer-social a {
            width: 40px; height: 40px; border-radius: 50%;
            background: var(--bg-soft); border: 1px solid var(--border);
            display: flex; align-items: center; justify-content: center;
            color: var(--text-muted); transition: var(--transition);
        }
        .footer-social a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-3px); }
        .footer-col h4 { font-size: 1rem; margin-bottom: 16px; color: var(--text); }
        .footer-col ul { display: flex; flex-direction: column; gap: 10px; }
        .footer-col ul a { color: var(--text-muted); font-size: 0.9rem; transition: var(--transition); display: flex; align-items: center; gap: 6px; }
        .footer-col ul a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            display: flex; align-items: center; justify-content: space-between;
            padding-top: 24px; border-top: 1px solid var(--border);
            font-size: 0.85rem; color: var(--text-muted); flex-wrap: wrap; gap: 12px;
        }
        .footer-bottom .legal { display: flex; gap: 20px; }
        .footer-bottom .legal a { color: var(--text-muted); font-size: 0.85rem; }
        .footer-bottom .legal a:hover { color: var(--primary-light); }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed; bottom: 30px; right: 30px;
            width: 48px; height: 48px; border-radius: 50%;
            background: var(--primary); color: #fff;
            border: none; cursor: pointer; font-size: 1.2rem;
            box-shadow: var(--shadow); transition: var(--transition);
            z-index: 999; display: flex; align-items: center; justify-content: center;
            opacity: 0; visibility: hidden; transform: translateY(20px);
        }
        .back-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
        .back-top:hover { background: var(--primary-dark); transform: translateY(-4px); box-shadow: var(--shadow-glow); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .page-banner h1 { font-size: 1.8rem; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
        }
        @media (max-width: 768px) {
            .menu-toggle { display: block; }
            .nav {
                position: fixed; top: var(--nav-height); left: 0; right: 0;
                background: rgba(15,15,26,0.98); backdrop-filter: blur(20px);
                flex-direction: column; padding: 24px; gap: 16px;
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%); opacity: 0;
                transition: var(--transition); pointer-events: none;
            }
            .nav.open { transform: translateY(0); opacity: 1; pointer-events: all; }
            .nav a { font-size: 1rem; padding: 8px 0; }
            .nav a.nav-cta { width: 100%; justify-content: center; }
            .page-banner { padding: 60px 0 40px; }
            .page-banner h1 { font-size: 1.5rem; }
            .article-body { padding: 24px; }
            .article-footer-bar { flex-direction: column; align-items: flex-start; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .section { padding: 48px 0; }
            .container { padding: 0 16px; }
            .sidebar-card { padding: 20px; }
        }
        @media (max-width: 480px) {
            .page-banner h1 { font-size: 1.25rem; }
            .article-body { padding: 16px; }
            .sidebar-card { padding: 16px; }
            .btn { padding: 10px 20px; font-size: 0.85rem; }
            .back-top { bottom: 16px; right: 16px; width: 40px; height: 40px; font-size: 1rem; }
        }

        /* ===== Utility ===== */
        .mt-0 { margin-top: 0; }
        .mb-0 { margin-bottom: 0; }
        .gap-8 { gap: 8px; }
        .gap-12 { gap: 12px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .flex-wrap { flex-wrap: wrap; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #f1c0c4;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --bg: #ffffff;
            --bg-alt: #f8f9fa;
            --bg-dark: #1d3557;
            --text: #1a1a2e;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border: #e0e0e0;
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

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

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

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.04);
            transition: var(--transition);
            height: var(--nav-height);
        }
        .header.scrolled {
            box-shadow: 0 2px 30px rgba(0, 0, 0, 0.08);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .logo i {
            font-size: 26px;
            color: var(--primary);
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 15px;
            color: var(--text);
            transition: var(--transition);
            position: relative;
        }
        .nav a:hover {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.06);
        }
        .nav a.active {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.1);
            font-weight: 600;
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav a.nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important;
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 15px rgba(230, 57, 70, 0.3);
            margin-left: 8px;
        }
        .nav a.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(230, 57, 70, 0.4);
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
        }
        .nav a.nav-cta i {
            font-size: 16px;
        }

        /* Mobile menu toggle */
        .menu-toggle {
            display: none;
            font-size: 26px;
            color: var(--text);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            background: none;
            border: none;
            cursor: pointer;
        }
        .menu-toggle:hover {
            background: rgba(0, 0, 0, 0.04);
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, var(--secondary) 0%, #0d1b2a 100%);
            position: relative;
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-hero h1 {
            font-size: 48px;
            color: var(--text-white);
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -1px;
        }
        .page-hero h1 i {
            color: var(--accent);
            margin-right: 12px;
        }
        .page-hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .page-hero .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            margin-top: 16px;
        }
        .page-hero .hero-stats .stat-item {
            text-align: center;
            color: #fff;
        }
        .page-hero .hero-stats .stat-item .num {
            font-size: 32px;
            font-weight: 800;
            color: var(--accent);
        }
        .page-hero .hero-stats .stat-item .label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 2px;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 16px 0 0;
            font-size: 14px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--secondary-light);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--border);
        }
        .breadcrumb .current {
            color: var(--text);
            font-weight: 500;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark .section-subtitle {
            color: var(--text-white);
        }
        .section-title {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
            text-align: center;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-light);
            text-align: center;
            max-width: 620px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .section-dark .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }
        .text-center {
            text-align: center;
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid rgba(0, 0, 0, 0.04);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .card .card-img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            display: block;
        }
        .card .card-body {
            padding: 24px;
        }
        .card .card-body h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .card .card-body p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .card .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-light);
        }
        .card .card-body .card-meta i {
            color: var(--primary);
        }
        .card .card-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(230, 57, 70, 0.1);
            color: var(--primary);
            margin-bottom: 10px;
        }

        /* ===== Category List / Guide Items ===== */
        .guide-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .guide-item {
            display: flex;
            gap: 24px;
            background: var(--bg);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: var(--transition);
            align-items: flex-start;
        }
        .guide-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .guide-item .guide-icon {
            flex-shrink: 0;
            width: 64px;
            height: 64px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        }
        .guide-item .guide-icon.alt1 {
            background: linear-gradient(135deg, var(--secondary), var(--secondary-light));
        }
        .guide-item .guide-icon.alt2 {
            background: linear-gradient(135deg, var(--accent), #e76f51);
        }
        .guide-item .guide-icon.alt3 {
            background: linear-gradient(135deg, #2a9d8f, #264653);
        }
        .guide-item .guide-content {
            flex: 1;
        }
        .guide-item .guide-content h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .guide-item .guide-content p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .guide-item .guide-content .guide-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .guide-item .guide-content .guide-tags span {
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 500;
            background: var(--bg-alt);
            color: var(--text-light);
            border: 1px solid var(--border);
        }

        /* ===== Stats / Data Row ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stats-row .stat-box {
            padding: 32px 16px;
            background: var(--bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: var(--transition);
        }
        .stats-row .stat-box:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .stats-row .stat-box .stat-num {
            font-size: 38px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stats-row .stat-box .stat-label {
            font-size: 15px;
            color: var(--text-light);
            margin-top: 6px;
            font-weight: 500;
        }
        .stats-row .stat-box .stat-icon {
            font-size: 32px;
            color: var(--primary-light);
            margin-bottom: 12px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item .faq-question {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 17px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            color: var(--text);
            border: none;
        }
        .faq-item .faq-question i {
            transition: var(--transition);
            color: var(--primary);
            font-size: 18px;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--secondary) 0%, #0d1b2a 100%);
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 36px;
            color: var(--text-white);
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            border-radius: 50px;
            font-size: 17px;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 8px 30px rgba(230, 57, 70, 0.35);
            transition: var(--transition);
        }
        .cta-section .cta-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(230, 57, 70, 0.45);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 30px;
        }
        .footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer .footer-brand .logo {
            margin-bottom: 16px;
            color: #fff;
        }
        .footer .footer-brand .logo span {
            -webkit-text-fill-color: #fff;
            background: none;
        }
        .footer .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }
        .footer .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 20px;
        }
        .footer .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 18px;
            transition: var(--transition);
        }
        .footer .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer .footer-col ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer .footer-bottom .legal {
            display: flex;
            gap: 20px;
        }
        .footer .footer-bottom .legal a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer .footer-bottom .legal a:hover {
            color: var(--primary);
        }

        /* ===== Features / Icon Row ===== */
        .features-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .features-row .feat-item {
            text-align: center;
            padding: 32px 16px;
            border-radius: var(--radius);
            background: var(--bg);
            box-shadow: var(--shadow);
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: var(--transition);
        }
        .features-row .feat-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .features-row .feat-item .feat-icon {
            font-size: 40px;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .features-row .feat-item h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .features-row .feat-item p {
            font-size: 14px;
            color: var(--text-light);
        }

        /* ===== Article List ===== */
        .article-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .article-card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid rgba(0, 0, 0, 0.04);
            transition: var(--transition);
        }
        .article-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .article-card .art-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .article-card .art-body {
            padding: 20px 24px 24px;
        }
        .article-card .art-body .art-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(230, 57, 70, 0.1);
            color: var(--primary);
            margin-bottom: 8px;
        }
        .article-card .art-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .article-card .art-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .article-card .art-body .art-meta {
            font-size: 13px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .article-card .art-body .art-meta i {
            color: var(--primary);
        }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 20px rgba(230, 57, 70, 0.3);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: var(--transition);
            border: none;
        }
        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
            box-shadow: 0 8px 30px rgba(230, 57, 70, 0.4);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guide-list {
                grid-template-columns: 1fr;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .features-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .article-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .page-hero h1 {
                font-size: 38px;
            }
        }
        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }
            .nav {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 6px;
                box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-radius: 0 0 var(--radius) var(--radius);
                z-index: 999;
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav a {
                width: 100%;
                text-align: left;
                padding: 12px 16px;
                font-size: 16px;
            }
            .nav a.nav-cta {
                margin-left: 0;
                justify-content: center;
                margin-top: 8px;
            }
            .nav a.active::after {
                display: none;
            }
            .page-hero {
                padding: 120px 0 60px;
                min-height: 300px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero p {
                font-size: 16px;
            }
            .page-hero .hero-stats {
                gap: 20px;
            }
            .page-hero .hero-stats .stat-item .num {
                font-size: 26px;
            }
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .section-subtitle {
                font-size: 15px;
                margin-bottom: 32px;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .guide-list {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .guide-item {
                flex-direction: column;
                padding: 20px;
            }
            .guide-item .guide-icon {
                width: 52px;
                height: 52px;
                font-size: 22px;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stats-row .stat-box {
                padding: 24px 12px;
            }
            .stats-row .stat-box .stat-num {
                font-size: 28px;
            }
            .features-row {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .features-row .feat-item {
                padding: 24px 12px;
            }
            .article-list {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 28px;
            }
            .cta-section .cta-btn {
                padding: 14px 32px;
                font-size: 15px;
            }
            .faq-item .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 16px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero p {
                font-size: 14px;
            }
            .section-title {
                font-size: 22px;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .features-row {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .guide-item .guide-content h3 {
                font-size: 18px;
            }
            .card .card-body h3 {
                font-size: 18px;
            }
            .footer .footer-grid {
                gap: 24px;
            }
        }