/* roulang page: index */
/* ========== Design Variables ========== */
        :root {
            --primary: #0f1e3d;
            --primary-dark: #0a1428;
            --primary-light: #1e3a6e;
            --accent: #f0a500;
            --accent-dark: #d49400;
            --accent-light: #ffc940;
            --bg: #f4f6f9;
            --bg-dark: #0c1526;
            --card-bg: #ffffff;
            --text: #1e293b;
            --text-light: #64748b;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --radius: 14px;
            --radius-sm: 8px;
            --shadow: 0 4px 24px rgba(15, 30, 61, 0.07);
            --shadow-lg: 0 12px 40px rgba(15, 30, 61, 0.13);
            --transition: all 0.3s ease;
            --container: 1200px;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

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

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

        /* ========== Buttons ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            transition: var(--transition);
            white-space: nowrap;
            border: 2px solid transparent;
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(240, 165, 0, 0.3);
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(240, 165, 0, 0.4);
        }
        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.7);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline-dark {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline-dark:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 13px;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(240, 165, 0, 0.4);
            outline-offset: 2px;
        }

        /* ========== Header / Nav ========== */
        .site-header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 12px rgba(15, 30, 61, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 18px;
            box-shadow: 0 4px 10px rgba(15, 30, 61, 0.2);
        }
        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.5px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            position: relative;
            padding: 6px 2px;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-link:hover,
        .nav-link.active {
            color: var(--primary);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            width: 100%;
        }
        .nav-cta {
            margin-left: 8px;
        }
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .mobile-toggle span {
            width: 22px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .mobile-toggle:hover {
            background: rgba(15, 30, 61, 0.06);
        }

        /* ========== Hero ========== */
        .hero {
            position: relative;
            padding: 120px 0 100px;
            background: linear-gradient(135deg, rgba(15, 30, 61, 0.88), rgba(10, 20, 40, 0.82)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(240, 165, 0, 0.2) 0%, transparent 65%);
            pointer-events: none;
        }
        .hero-inner {
            position: relative;
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }
        .hero-content {
            max-width: 640px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(240, 165, 0, 0.15);
            border: 1px solid rgba(240, 165, 0, 0.35);
            color: var(--accent-light);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 24px;
            letter-spacing: 0.5px;
        }
        .hero-title {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -1px;
        }
        .hero-title span {
            color: var(--accent);
        }
        .hero-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 540px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }
        .hero-trust {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
        }
        .trust-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
        }
        .trust-item i {
            color: var(--accent);
            font-size: 15px;
        }
        .hero-panel {
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius);
            padding: 32px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
        }
        .panel-header {
            text-align: center;
            margin-bottom: 24px;
        }
        .panel-header h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .panel-header p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }
        .panel-form {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .form-group {
            position: relative;
        }
        .form-group i {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: rgba(255, 255, 255, 0.5);
            font-size: 14px;
        }
        .form-group input {
            width: 100%;
            padding: 13px 16px 13px 44px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 14px;
            transition: var(--transition);
        }
        .form-group input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .form-group input:focus {
            outline: none;
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.15);
            box-shadow: 0 0 0 3px rgba(240, 165, 0, 0.2);
        }
        .btn-block {
            width: 100%;
            margin-top: 4px;
        }
        .panel-footer {
            text-align: center;
            margin-top: 18px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }
        .panel-footer a {
            color: var(--accent-light);
            font-weight: 600;
        }

        /* ========== Section Common ========== */
        .section {
            padding: 90px 0;
        }
        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 56px;
        }
        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            color: var(--accent-dark);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
            background: rgba(240, 165, 0, 0.1);
            padding: 4px 14px;
            border-radius: 50px;
        }
        .section-title {
            font-size: 34px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ========== Features / Core ========== */
        .features {
            background: #fff;
            border-bottom: 1px solid var(--border);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            padding: 32px 26px;
            border-radius: var(--radius);
            background: var(--bg);
            border: 1px solid var(--border);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -40px;
            width: 100px;
            height: 100px;
            border-radius: 50%;
            background: rgba(240, 165, 0, 0.08);
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(240, 165, 0, 0.3);
        }
        .feature-icon {
            width: 54px;
            height: 54px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 22px;
            margin-bottom: 20px;
            box-shadow: 0 4px 14px rgba(15, 30, 61, 0.18);
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.65;
        }

        /* ========== Categories ========== */
        .categories {
            background: var(--bg);
        }
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: flex-end;
            box-shadow: var(--shadow);
            transition: var(--transition);
            background-size: cover;
            background-position: center;
        }
        .category-card::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 30, 61, 0.1) 0%, rgba(15, 30, 61, 0.55) 55%, rgba(15, 30, 61, 0.85) 100%);
            border-radius: var(--radius);
            transition: var(--transition);
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: 0 16px 44px rgba(15, 30, 61, 0.2);
        }
        .category-card:hover::before {
            background: linear-gradient(180deg, rgba(15, 30, 61, 0.15) 0%, rgba(15, 30, 61, 0.6) 55%, rgba(15, 30, 61, 0.9) 100%);
        }
        .category-card-content {
            position: relative;
            padding: 32px;
            width: 100%;
        }
        .category-card-content h3 {
            color: #fff;
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .category-card-content p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 14px;
            line-height: 1.6;
            margin-bottom: 16px;
            max-width: 380px;
        }
        .category-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent-light);
            font-size: 14px;
            font-weight: 600;
        }
        .category-link i {
            transition: transform 0.3s ease;
        }
        .category-card:hover .category-link i {
            transform: translateX(4px);
        }

        /* ========== News / CMS List ========== */
        .news-section {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            position: relative;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(240, 165, 0, 0.25);
        }
        .news-card-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 14px;
        }
        .news-badge {
            background: rgba(240, 165, 0, 0.12);
            color: var(--accent-dark);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 50px;
        }
        .news-date {
            font-size: 12px;
            color: var(--text-muted);
        }
        .news-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.5;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-more {
            margin-top: 16px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .news-more i {
            font-size: 12px;
            transition: transform 0.3s ease;
        }
        .news-card:hover .news-more i {
            transform: translateX(4px);
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            font-size: 15px;
            background: var(--bg);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }

        /* ========== Stats ========== */
        .stats-section {
            background: var(--primary);
            position: relative;
            overflow: hidden;
            color: #fff;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            top: -150px;
            left: 50%;
            transform: translateX(-50%);
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(240, 165, 0, 0.12) 0%, transparent 60%);
            pointer-events: none;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        .stat-item {
            text-align: center;
            padding: 20px;
        }
        .stat-num {
            font-size: 44px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 8px;
            letter-spacing: -1px;
        }
        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            letter-spacing: 0.5px;
        }

        /* ========== Steps ========== */
        .steps {
            background: var(--bg);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            position: relative;
        }
        .steps-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 15%;
            right: 15%;
            height: 2px;
            background: linear-gradient(90deg, var(--accent), var(--border));
            border-radius: 2px;
            z-index: 0;
        }
        .step-item {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 32px 20px;
        }
        .step-dot {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: var(--card-bg);
            border: 3px solid var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            box-shadow: 0 8px 24px rgba(240, 165, 0, 0.25);
        }
        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.65;
            max-width: 240px;
            margin: 0 auto;
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: #fff;
            border-top: 1px solid var(--border);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
            padding: 20px 24px;
        }
        .faq-item:hover {
            border-color: rgba(240, 165, 0, 0.3);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            transition: var(--transition);
            gap: 12px;
        }
        .faq-question i {
            font-size: 14px;
            color: var(--accent);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease, opacity 0.3s ease;
            opacity: 0;
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            opacity: 1;
            padding-top: 16px;
        }
        .faq-item.open .faq-question i {
            transform: rotate(45deg);
        }

        /* ========== CTA ========== */
        .cta-section {
            position: relative;
            padding: 100px 0;
            background: linear-gradient(135deg, rgba(15, 30, 61, 0.9), rgba(15, 30, 61, 0.75)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
            text-align: center;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            bottom: -120px;
            left: -60px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(240, 165, 0, 0.18) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .cta-inner p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.7;
            margin-bottom: 32px;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .cta-note {
            margin-top: 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .footer-brand .brand-icon {
            background: rgba(255, 255, 255, 0.12);
            color: var(--accent);
        }
        .footer-brand span {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
        }
        .footer-about {
            font-size: 14px;
            line-height: 1.7;
            max-width: 320px;
            margin-bottom: 20px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 20px;
        }
        .footer-col ul li {
            margin-bottom: 12px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .hero {
                padding: 80px 0 60px;
            }
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-content {
                max-width: 100%;
                text-align: center;
            }
            .hero-desc {
                margin-left: auto;
                margin-right: auto;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-trust {
                justify-content: center;
            }
            .hero-panel {
                max-width: 480px;
                margin: 0 auto;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                background: #fff;
            }
            .header-inner {
                height: 64px;
            }
            .mobile-toggle {
                display: flex;
            }
            .main-nav {
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                gap: 0;
                padding: 16px 24px 24px;
                box-shadow: 0 12px 32px rgba(15, 30, 61, 0.08);
                border-bottom: 1px solid var(--border);
                display: none;
            }
            .main-nav.nav-open {
                display: flex;
            }
            .main-nav .nav-link {
                width: 100%;
                padding: 14px 0;
                border-bottom: 1px solid var(--border);
                text-align: center;
            }
            .main-nav .nav-link::after {
                display: none;
            }
            .main-nav .nav-cta {
                margin: 16px 0 0;
                width: 100%;
                justify-content: center;
            }
            .hero {
                padding: 56px 0 48px;
            }
            .hero-title {
                font-size: 30px;
            }
            .hero-desc {
                font-size: 15px;
            }
            .section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .category-card {
                min-height: 240px;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid::before {
                display: none;
            }
            .step-item {
                padding: 16px 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .cta-inner h2 {
                font-size: 28px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .brand-text {
                font-size: 17px;
            }
            .hero-title {
                font-size: 26px;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .hero-panel {
                padding: 24px 18px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-num {
                font-size: 30px;
            }
            .section-title {
                font-size: 24px;
            }
            .cta-actions {
                flex-direction: column;
                width: 100%;
            }
            .cta-actions .btn {
                width: 100%;
            }
        }

/* roulang page: article */
:root {
            --primary: #0c2543;
            --primary-light: #174a73;
            --primary-dark: #071828;
            --accent: #f6a722;
            --accent-hover: #e0930d;
            --bg: #f4f7fb;
            --bg-white: #ffffff;
            --bg-dark: #0b1f33;
            --text: #18324e;
            --text-weak: #5d7089;
            --border: #dde5ef;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 22px;
            --shadow: 0 10px 32px rgba(8, 30, 58, 0.08);
            --shadow-lg: 0 24px 60px rgba(8, 30, 58, 0.14);
            --transition: all 0.25s ease;
            --container: 1200px;
        }

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

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Segoe UI", Roboto, sans-serif;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            font-size: 15px;
            overflow-x: hidden;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

        button,
        input {
            font-family: inherit;
            font-size: 100%;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(13, 31, 53, 0.06);
            box-shadow: 0 2px 18px rgba(8, 30, 58, 0.05);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            min-width: 0;
        }

        .brand-icon {
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            color: #fff;
            border-radius: 14px;
            font-size: 20px;
            box-shadow: 0 6px 16px rgba(12, 37, 67, 0.25);
            flex-shrink: 0;
        }

        .brand-text {
            font-size: 20px;
            font-weight: 800;
            letter-spacing: 1px;
            color: var(--primary);
            white-space: nowrap;
        }

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

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

        .nav-link {
            display: inline-block;
            padding: 10px 18px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 14.5px;
            color: var(--text);
            position: relative;
            transition: var(--transition);
        }

        .nav-link:hover {
            color: var(--accent-hover);
            background: rgba(246, 167, 34, 0.08);
        }

        .nav-link.active {
            color: var(--accent-hover);
            background: rgba(246, 167, 34, 0.1);
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 50%;
            bottom: 2px;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--accent);
        }

        .nav-cta {
            margin-left: 10px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: rgba(12, 37, 67, 0.04);
            cursor: pointer;
            align-items: center;
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            transition: var(--transition);
        }

        .nav-toggle:hover span {
            background: var(--accent);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: 12px;
            font-weight: 700;
            font-size: 14px;
            line-height: 1;
            cursor: pointer;
            border: 2px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
            text-align: center;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
        }

        .btn-primary:hover {
            background: var(--primary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 12px 26px rgba(12, 37, 67, 0.25);
        }

        .btn-accent {
            background: var(--accent);
            color: var(--primary);
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 12px 26px rgba(246, 167, 34, 0.35);
        }

        .btn-outline {
            background: transparent;
            border-color: #d4dfeb;
            color: var(--primary);
        }

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent-hover);
            background: rgba(246, 167, 34, 0.06);
        }

        .btn-lg {
            padding: 16px 40px;
            font-size: 16px;
            border-radius: 14px;
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
            border-radius: 8px;
        }

        .btn-block {
            width: 100%;
        }

        .btn:active {
            transform: translateY(0) scale(0.98);
        }

        .btn:focus-visible,
        .nav-link:focus-visible,
        a:focus-visible {
            outline: 3px solid rgba(246, 167, 34, 0.5);
            outline-offset: 2px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            background: rgba(246, 167, 34, 0.14);
            color: #b97a00;
            border-radius: 30px;
            font-size: 12.5px;
            font-weight: 700;
            letter-spacing: 0.5px;
        }

        .article-hero {
            position: relative;
            padding: 80px 0 70px;
            background-size: cover;
            background-position: center;
            color: #fff;
            isolation: isolate;
        }

        .article-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(7, 24, 40, 0.9) 0%, rgba(10, 35, 62, 0.78) 50%, rgba(15, 58, 94, 0.55) 100%);
            z-index: -1;
        }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 13.5px;
            color: rgba(255, 255, 255, 0.72);
            margin-bottom: 34px;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb .sep {
            opacity: 0.5;
        }

        .article-hero-content {
            max-width: 860px;
        }

        .article-hero-content .badge {
            background: rgba(246, 167, 34, 0.2);
            color: #ffd88a;
            margin-bottom: 18px;
        }

        .article-hero-content h1 {
            font-size: clamp(32px, 4.5vw, 48px);
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: 1px;
            margin-bottom: 20px;
            text-shadow: 0 2px 18px rgba(0, 0, 0, 0.18);
        }

        .article-hero .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 13.5px;
            color: rgba(255, 255, 255, 0.75);
        }

        .article-hero .meta span {
            display: inline-flex;
            align-items: center;
            gap: 7px;
        }

        .article-hero .meta i {
            color: var(--accent);
        }

        .article-body {
            padding: 60px 0 70px;
        }

        .article-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 360px;
            gap: 48px;
            align-items: start;
        }

        .article-main {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 48px 50px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(221, 229, 239, 0.6);
        }

        .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: #26394c;
        }

        .article-content h2 {
            font-size: 24px;
            font-weight: 800;
            color: var(--primary);
            margin: 32px 0 14px;
            padding-left: 14px;
            border-left: 4px solid var(--accent);
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            margin: 26px 0 10px;
        }

        .article-content p {
            margin-bottom: 18px;
        }

        .article-content ul,
        .article-content ol {
            margin: 16px 0 20px;
            padding-left: 26px;
        }

        .article-content ul {
            list-style: disc;
        }

        .article-content ol {
            list-style: decimal;
        }

        .article-content li {
            margin-bottom: 8px;
        }

        .article-content img {
            border-radius: 14px;
            margin: 22px 0;
            box-shadow: 0 10px 30px rgba(8, 30, 58, 0.12);
        }

        .article-content blockquote {
            background: rgba(246, 167, 34, 0.08);
            border-left: 4px solid var(--accent);
            padding: 16px 22px;
            border-radius: 0 12px 12px 0;
            margin: 22px 0;
            color: #4c5a6b;
            font-size: 15px;
        }

        .article-content a {
            color: var(--primary-light);
            border-bottom: 1px dashed rgba(23, 74, 115, 0.4);
        }

        .article-content a:hover {
            color: var(--accent-hover);
            border-bottom-color: var(--accent);
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 36px;
            padding-top: 28px;
            border-top: 1px solid #edf1f6;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 14px;
            background: #f0f4f9;
            border-radius: 30px;
            font-size: 12.5px;
            font-weight: 600;
            color: var(--text-weak);
        }

        .tag i {
            color: var(--accent);
        }

        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 22px;
            padding-top: 22px;
            border-top: 1px solid #edf1f6;
            font-size: 13.5px;
            color: var(--text-weak);
        }

        .share-link {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: #f0f4f9;
            color: var(--text);
            font-size: 17px;
            transition: var(--transition);
        }

        .share-link:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 8px 18px rgba(246, 167, 34, 0.35);
        }

        .not-found {
            text-align: center;
            padding: 60px 20px;
        }

        .not-found i {
            font-size: 64px;
            color: #c2cbd6;
            margin-bottom: 20px;
        }

        .not-found h2 {
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .not-found p {
            color: var(--text-weak);
            margin-bottom: 28px;
        }

        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }

        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 30px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(221, 229, 239, 0.5);
        }

        .sidebar-card h3 {
            font-size: 17px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid #f0f3f8;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card h3 i {
            color: var(--accent);
        }

        .sidebar-img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-radius: 12px;
            margin-bottom: 16px;
        }

        .sidebar-card p {
            font-size: 13.5px;
            color: var(--text-weak);
            margin-bottom: 18px;
        }

        .sidebar-list li {
            padding: 12px 0;
            border-bottom: 1px solid #f0f3f8;
            font-size: 14px;
            line-height: 1.5;
        }

        .sidebar-list li:last-child {
            border-bottom: none;
        }

        .sidebar-list li a {
            color: var(--text);
            font-weight: 500;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }

        .sidebar-list li a::before {
            content: "\f105";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            color: var(--accent);
            font-size: 13px;
            margin-top: 3px;
        }

        .sidebar-list li a:hover {
            color: var(--accent-hover);
            transform: translateX(4px);
        }

        .related-section {
            padding: 70px 0;
            background: var(--bg-white);
        }

        .section-head {
            margin-bottom: 40px;
        }

        .section-head h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 1px;
            line-height: 1.3;
            margin-bottom: 8px;
        }

        .section-head p {
            font-size: 15px;
            color: var(--text-weak);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid rgba(221, 229, 239, 0.5);
            box-shadow: 0 4px 18px rgba(8, 30, 58, 0.05);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(246, 167, 34, 0.5);
        }

        .related-card .img-wrap {
            position: relative;
            overflow: hidden;
            height: 180px;
        }

        .related-card .img-wrap::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(7, 24, 40, 0.25), transparent 60%);
        }

        .related-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .related-card:hover .img-wrap img {
            transform: scale(1.06);
        }

        .related-info {
            padding: 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .related-info .badge {
            align-self: flex-start;
            margin-bottom: 12px;
        }

        .related-info h3 {
            font-size: 16px;
            font-weight: 700;
            line-height: 1.6;
            margin-bottom: 10px;
        }

        .related-info h3 a:hover {
            color: var(--accent-hover);
        }

        .related-info p {
            font-size: 13px;
            color: var(--text-weak);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .faq-section {
            padding: 72px 0;
            background: var(--bg);
        }

        .faq-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 28px;
            border: 1px solid rgba(221, 229, 239, 0.5);
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(246, 167, 34, 0.4);
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }

        .faq-item h3 {
            font-size: 16.5px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

        .faq-item h3::before {
            content: "Q";
            width: 28px;
            height: 28px;
            background: var(--accent);
            color: #fff;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .faq-item p {
            font-size: 13.5px;
            color: var(--text-weak);
            line-height: 1.8;
            padding-left: 38px;
        }

        .cta-section {
            padding: 72px 0;
            background-size: cover;
            background-position: center;
            text-align: center;
            color: #fff;
            position: relative;
            isolation: isolate;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(7, 24, 40, 0.92), rgba(12, 37, 67, 0.78));
            z-index: -1;
        }

        .cta-section h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }

        .cta-section p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 520px;
            margin: 0 auto 30px;
        }

        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.68);
            padding: 64px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 44px;
            margin-bottom: 44px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 18px;
        }

        .footer-brand .brand-icon {
            background: linear-gradient(135deg, var(--accent), #f8b94e);
            color: var(--primary);
            box-shadow: none;
        }

        .footer-brand span:last-child {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
        }

        .footer-about {
            font-size: 13.5px;
            line-height: 1.85;
            margin-bottom: 22px;
            max-width: 380px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h4::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 26px;
            height: 3px;
            border-radius: 3px;
            background: var(--accent);
        }

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul a {
            font-size: 13.5px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }

        .footer-col ul a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 22px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr 300px;
                gap: 32px;
            }

            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .faq-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 18px;
            }

            .header-inner {
                height: 64px;
            }

            .main-nav {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 14px 18px 20px;
                gap: 4px;
                box-shadow: 0 16px 40px rgba(8, 30, 58, 0.12);
                border-radius: 0 0 18px 18px;
            }

            .main-nav.open {
                display: flex;
            }

            .main-nav .nav-link {
                padding: 14px 16px;
                border-radius: 10px;
                font-size: 15px;
            }

            .main-nav .nav-link.active::after {
                display: none;
            }

            .nav-cta {
                margin: 8px 0 0;
                text-align: center;
            }

            .nav-toggle {
                display: flex;
            }

            .article-hero {
                padding: 48px 0 42px;
            }

            .article-hero .breadcrumb {
                margin-bottom: 22px;
                font-size: 12.5px;
            }

            .article-body {
                padding: 36px 0 48px;
            }

            .article-layout {
                grid-template-columns: 1fr;
            }

            .article-main {
                padding: 30px 24px;
                border-radius: 16px;
            }

            .article-content {
                font-size: 15px;
            }

            .article-content h2 {
                font-size: 21px;
            }

            .article-sidebar {
                flex-direction: row;
                gap: 20px;
                overflow-x: auto;
                padding-bottom: 6px;
            }

            .sidebar-card {
                min-width: 260px;
            }

            .related-section {
                padding: 48px 0;
            }

            .section-head h2 {
                font-size: 24px;
            }

            .faq-section {
                padding: 48px 0;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 36px;
                margin-bottom: 30px;
            }

            .cta-section {
                padding: 54px 0;
            }

            .cta-section h2 {
                font-size: 24px;
            }
        }

        @media (max-width: 520px) {
            .brand-text {
                font-size: 17px;
            }

            .brand-icon {
                width: 38px;
                height: 38px;
                font-size: 16px;
                border-radius: 11px;
            }

            .article-hero .meta {
                flex-direction: column;
                gap: 8px;
            }

            .article-main {
                padding: 24px 18px;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .faq-grid {
                grid-template-columns: 1fr;
            }

            .btn-lg {
                padding: 14px 28px;
                font-size: 14px;
            }

            .footer-brand span:last-child {
                font-size: 18px;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #0b1a3a;
            --color-primary-light: #162a56;
            --color-primary-dark: #060f24;
            --color-accent: #f0a92e;
            --color-accent-hover: #dd9720;
            --color-cyan: #19b8a8;
            --color-bg: #f4f6fb;
            --color-card: #ffffff;
            --color-text: #1c2b4a;
            --color-text-weak: #667394;
            --color-border: #e4e9f3;
            --color-section-alt: #e9edf5;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 10px rgba(6, 15, 36, 0.06);
            --shadow-md: 0 8px 28px rgba(6, 15, 36, 0.1);
            --shadow-lg: 0 18px 44px rgba(6, 15, 36, 0.14);
            --container: 1200px;
            --header-h: 72px;
            --transition: all 0.25s ease;
        }

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

        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(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        a:focus-visible,
        button:focus-visible,
        .btn:focus-visible {
            outline: 3px solid rgba(240, 169, 46, 0.5);
            outline-offset: 2px;
        }

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

        /* ===== header & nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--color-primary);
            box-shadow: 0 4px 20px rgba(6, 15, 36, 0.18);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.2px;
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--color-accent), #ffc96b);
            color: var(--color-primary);
            font-size: 17px;
            box-shadow: 0 4px 12px rgba(240, 169, 46, 0.35);
        }

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

        .nav-link {
            padding: 8px 18px;
            border-radius: 30px;
            color: rgba(255, 255, 255, 0.75);
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
        }

        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.1);
        }

        .nav-link.active {
            background: var(--color-accent);
            color: var(--color-primary);
        }

        .nav-cta {
            margin-left: 8px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
        }

        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
        }

        /* ===== buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 700;
            transition: var(--transition);
            border: 2px solid transparent;
        }

        .btn-accent {
            background: var(--color-accent);
            color: var(--color-primary);
        }

        .btn-accent:hover {
            background: var(--color-accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(240, 169, 46, 0.3);
        }

        .btn-light {
            background: #fff;
            color: var(--color-primary);
        }

        .btn-light:hover {
            background: #f0f2f8;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }

        .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }

        /* ===== page hero ===== */
        .page-hero {
            position: relative;
            padding: 96px 0 88px;
            background-size: cover;
            background-position: center;
            color: #fff;
            text-align: center;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(6, 15, 36, 0.82), rgba(6, 15, 36, 0.62));
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 16px;
        }

        .breadcrumb a:hover {
            color: var(--color-accent);
        }

        .breadcrumb .sep {
            opacity: 0.6;
        }

        .page-hero h1 {
            font-size: 44px;
            line-height: 1.2;
            font-weight: 800;
            letter-spacing: 0.5px;
        }

        .page-hero p {
            max-width: 660px;
            margin: 14px auto 0;
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 14px;
            margin-top: 28px;
            flex-wrap: wrap;
        }

        /* ===== section common ===== */
        .section {
            padding: 76px 0;
        }

        .section-head {
            max-width: 680px;
            margin: 0 auto 50px;
            text-align: center;
        }

        .section-tag {
            display: inline-block;
            padding: 5px 14px;
            background: rgba(240, 169, 46, 0.12);
            border: 1px solid rgba(240, 169, 46, 0.3);
            color: #a87712;
            border-radius: 30px;
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.5px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            margin-top: 10px;
            color: var(--color-primary);
            line-height: 1.3;
        }

        .section-head p {
            margin-top: 10px;
            color: var(--color-text-weak);
            font-size: 15px;
        }

        /* ===== mini cards ===== */
        .mini-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }

        .mini-card {
            background: var(--color-card);
            border-radius: var(--radius);
            border: 1px solid var(--color-border);
            padding: 30px 22px 26px;
            text-align: center;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            display: block;
        }

        .mini-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(240, 169, 46, 0.4);
        }

        .mini-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(240, 169, 46, 0.18), rgba(25, 184, 168, 0.12));
            color: var(--color-accent);
            font-size: 22px;
        }

        .mini-card h3 {
            margin-top: 14px;
            font-size: 17px;
            font-weight: 700;
            color: var(--color-primary);
        }

        .mini-card p {
            margin-top: 8px;
            font-size: 13px;
            color: var(--color-text-weak);
            line-height: 1.6;
        }

        /* ===== article section ===== */
        .article-section {
            background: var(--color-bg);
        }

        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .article-card {
            background: var(--color-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }

        .article-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-md);
        }

        .article-cover {
            position: relative;
            height: 200px;
            overflow: hidden;
        }

        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .article-card:hover .article-cover img {
            transform: scale(1.05);
        }

        .article-cover .tag {
            position: absolute;
            top: 12px;
            left: 12px;
        }

        .tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(6, 15, 36, 0.72);
            backdrop-filter: blur(6px);
            color: #fff;
            border-radius: 30px;
            font-size: 11px;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        .article-body {
            padding: 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .article-meta {
            display: flex;
            gap: 14px;
            font-size: 12px;
            color: var(--color-text-weak);
        }

        .article-meta i {
            margin-right: 4px;
            color: var(--color-accent);
        }

        .article-body h3 {
            font-size: 17px;
            line-height: 1.45;
            font-weight: 700;
            margin: 10px 0 8px;
        }

        .article-body h3 a {
            color: var(--color-primary);
            transition: var(--transition);
        }

        .article-body h3 a:hover {
            color: var(--color-accent);
        }

        .article-body p {
            font-size: 13px;
            color: var(--color-text-weak);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .card-link {
            margin-top: auto;
            font-size: 13px;
            font-weight: 700;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }

        .card-link:hover {
            gap: 10px;
            color: var(--color-accent-hover);
        }

        /* ===== process ===== */
        .process-section {
            background: var(--color-section-alt);
        }

        .steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }

        .step-item {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius);
            padding: 30px 24px;
            position: relative;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .step-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: rgba(240, 169, 46, 0.35);
        }

        .step-num {
            font-size: 32px;
            font-weight: 800;
            color: var(--color-accent);
            opacity: 0.9;
            line-height: 1;
        }

        .step-item h3 {
            color: var(--color-primary);
            font-size: 17px;
            margin-top: 14px;
            line-height: 1.4;
        }

        .step-item p {
            color: var(--color-text-weak);
            font-size: 13px;
            margin-top: 8px;
            line-height: 1.7;
        }

        /* ===== stats ===== */
        .stats-section {
            background: var(--color-primary);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-item {
            text-align: center;
            padding: 34px 16px;
            border-radius: var(--radius);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }

        .stat-item:hover {
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-4px);
        }

        .stat-number {
            display: block;
            font-size: 40px;
            font-weight: 800;
            color: var(--color-accent);
        }

        .stat-label {
            display: block;
            margin-top: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== faq ===== */
        .faq-section {
            background: #fff;
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            border: 1px solid var(--color-border);
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--color-card);
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(240, 169, 46, 0.4);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            padding: 18px 22px;
            font-size: 15px;
            font-weight: 700;
            color: var(--color-primary);
            text-align: left;
            transition: var(--transition);
        }

        .faq-question::after {
            content: "+";
            font-size: 22px;
            color: var(--color-accent);
            transition: var(--transition);
            line-height: 1;
        }

        .faq-item.open .faq-question::after {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            padding: 0 22px;
        }

        .faq-item.open .faq-answer {
            max-height: 240px;
            padding-bottom: 18px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--color-text-weak);
            line-height: 1.75;
        }

        /* ===== cta ===== */
        .cta-section {
            padding: 72px 0;
        }

        .cta-card {
            background: linear-gradient(135deg, #f0a92e, #ffc96b);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            color: var(--color-primary);
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .cta-card::before {
            content: "";
            position: absolute;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.18);
            top: -120px;
            right: -80px;
        }

        .cta-card::after {
            content: "";
            position: absolute;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(6, 15, 36, 0.06);
            bottom: -70px;
            left: -40px;
        }

        .cta-card h2 {
            font-size: 30px;
            font-weight: 800;
            position: relative;
            z-index: 1;
        }

        .cta-card p {
            color: rgba(6, 15, 36, 0.75);
            margin-top: 10px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
            position: relative;
            z-index: 1;
            font-size: 15px;
        }

        .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            margin-top: 28px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .cta-card .btn-accent {
            background: var(--color-primary);
            color: #fff;
        }

        .cta-card .btn-accent:hover {
            background: var(--color-primary-light);
            box-shadow: 0 8px 20px rgba(6, 15, 36, 0.25);
        }

        .cta-card .btn-outline-light {
            border-color: rgba(6, 15, 36, 0.35);
            color: var(--color-primary);
        }

        .cta-card .btn-outline-light:hover {
            background: rgba(6, 15, 36, 0.08);
            border-color: var(--color-primary);
        }

        /* ===== footer ===== */
        .site-footer {
            background: #081229;
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
        }

        .footer-about {
            font-size: 14px;
            line-height: 1.8;
            margin: 16px 0 20px;
            max-width: 380px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-col h4 {
            font-size: 15px;
            color: #fff;
            margin-bottom: 16px;
            font-weight: 700;
        }

        .footer-col li {
            margin-bottom: 10px;
        }

        .footer-col a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--color-accent);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            margin-top: 44px;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.7);
        }

        .footer-bottom a:hover {
            color: var(--color-accent);
        }

        /* ===== responsive ===== */
        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .mini-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .steps {
                grid-template-columns: repeat(2, 1fr);
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
                position: relative;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                background: var(--color-primary);
                padding: 16px 8px;
                border-radius: 0 0 var(--radius) var(--radius);
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 0;
                box-shadow: 0 16px 30px rgba(6, 15, 36, 0.3);
            }

            .main-nav.open {
                display: flex;
            }

            .nav-link {
                text-align: center;
                padding: 12px 16px;
            }

            .nav-cta {
                margin: 8px 0 0;
                width: 100%;
            }

            .page-hero {
                padding: 72px 0 64px;
            }

            .page-hero h1 {
                font-size: 32px;
            }

            .section {
                padding: 58px 0;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .cta-card {
                padding: 44px 28px;
            }
        }

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

            .mini-grid {
                grid-template-columns: 1fr;
            }

            .article-grid {
                grid-template-columns: 1fr;
            }

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

            .stats-grid {
                grid-template-columns: 1fr;
            }

            .page-hero {
                padding: 58px 0 50px;
            }

            .page-hero h1 {
                font-size: 27px;
            }

            .page-hero p {
                font-size: 14px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: center;
            }

            .section-head h2 {
                font-size: 23px;
            }

            .faq-question {
                font-size: 14px;
                padding: 16px 16px;
            }

            .faq-answer {
                padding: 0 16px;
            }

            .faq-item.open .faq-answer {
                padding-bottom: 14px;
            }

            .cta-card {
                padding: 36px 20px;
            }

            .cta-card h2 {
                font-size: 24px;
            }

            .cta-card p {
                font-size: 13px;
            }

            .stat-number {
                font-size: 34px;
            }
        }