/* roulang page: index */
:root {
            --c-bg: #060B18;
            --c-bg-soft: #0A1120;
            --c-card: rgba(255, 255, 255, 0.04);
            --c-card-hover: rgba(255, 255, 255, 0.07);
            --c-border: rgba(255, 255, 255, 0.08);
            --c-border-hover: rgba(56, 189, 248, 0.4);
            --c-text: #E6EDF7;
            --c-muted: #8CA3C7;
            --c-accent: #38BDF8;
            --c-gold: #F5B841;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
            --shadow-sm: 0 8px 24px rgba(0, 0, 0, 0.25);
            --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Segoe UI', sans-serif;
            background: var(--c-bg);
            color: var(--c-text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

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

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

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

        /* ============ Header & Nav ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(6, 11, 24, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
        }

        .header-inner {
            height: 76px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 1px;
            color: var(--c-text);
            white-space: nowrap;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--c-accent), #6366F1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: #fff;
            box-shadow: 0 8px 24px rgba(56, 189, 248, 0.35);
            flex-shrink: 0;
        }

        .logo-text {
            background: linear-gradient(90deg, #E6EDF7, #94A3B8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

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

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 18px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--c-muted);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--c-text);
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-link.active {
            color: var(--c-accent);
            background: rgba(56, 189, 248, 0.12);
            font-weight: 600;
        }

        .nav-cta {
            margin-left: 12px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 11px 22px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--c-accent), #6366F1);
            box-shadow: 0 8px 24px rgba(56, 189, 248, 0.35);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(56, 189, 248, 0.5);
        }

        .nav-cta i {
            font-size: 13px;
        }

        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            border: 1px solid var(--c-border);
            color: var(--c-text);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.04);
            transition: all var(--transition);
        }

        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        .mobile-menu {
            display: none;
            padding: 16px 24px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            background: rgba(6, 11, 24, 0.98);
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu .nav-link {
            display: flex;
            width: 100%;
            border-radius: 12px;
            padding: 14px 16px;
            font-size: 16px;
        }

        .mobile-menu .nav-cta {
            display: flex;
            justify-content: center;
            width: 100%;
            margin: 12px 0 0;
        }

        /* ============ Buttons ============ */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 13px 30px;
            border-radius: 999px;
            font-size: 16px;
            font-weight: 600;
            line-height: 1.4;
            transition: all var(--transition);
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .btn-primary {
            color: #0B1426;
            background: linear-gradient(135deg, #38BDF8, #818CF8);
            box-shadow: 0 10px 30px rgba(56, 189, 248, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 16px 40px rgba(56, 189, 248, 0.5);
        }

        .btn-ghost {
            color: var(--c-text);
            border-color: rgba(255, 255, 255, 0.18);
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(8px);
        }

        .btn-ghost:hover {
            border-color: rgba(56, 189, 248, 0.5);
            background: rgba(56, 189, 248, 0.08);
            transform: translateY(-3px);
        }

        .btn-gold {
            color: #0B1426;
            background: linear-gradient(135deg, #F5B841, #F59E0B);
            box-shadow: 0 10px 30px rgba(245, 184, 65, 0.3);
        }

        .btn-gold:hover {
            transform: translateY(-3px);
            box-shadow: 0 16px 40px rgba(245, 184, 65, 0.4);
        }

        .btn-lg {
            padding: 16px 40px;
            font-size: 17px;
        }

        /* ============ Hero ============ */
        .hero {
            position: relative;
            min-height: 720px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            z-index: 0;
            animation: slowZoom 30s ease-in-out infinite alternate;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg,
                    rgba(6, 11, 24, 0.95) 10%,
                    rgba(6, 11, 24, 0.75) 45%,
                    rgba(6, 11, 24, 0.35) 80%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 60px;
            align-items: center;
            padding-top: 80px;
            padding-bottom: 80px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--c-accent);
            background: rgba(56, 189, 248, 0.12);
            border: 1px solid rgba(56, 189, 248, 0.25);
            margin-bottom: 24px;
            backdrop-filter: blur(8px);
        }

        .hero-badge i {
            font-size: 12px;
        }

        .hero h1 {
            font-size: 52px;
            line-height: 1.2;
            font-weight: 800;
            letter-spacing: 2px;
            margin-bottom: 18px;
            background: linear-gradient(90deg, #FFFFFF, #7DD3FC 70%, #818CF8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-sub {
            font-size: 20px;
            color: var(--c-accent);
            font-weight: 500;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .hero-desc {
            font-size: 16px;
            color: var(--c-muted);
            max-width: 520px;
            margin-bottom: 36px;
            line-height: 1.8;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-card {
            background: rgba(10, 17, 32, 0.75);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 28px;
            backdrop-filter: blur(20px);
            box-shadow: var(--shadow);
            position: relative;
            overflow: hidden;
        }

        .hero-card::before {
            content: '';
            position: absolute;
            top: -2px;
            right: 20%;
            width: 60%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--c-accent), transparent);
        }

        .hcard-top {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            color: var(--c-muted);
            margin-bottom: 24px;
        }

        .dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #34D399;
            box-shadow: 0 0 12px rgba(52, 211, 153, 0.8);
            display: inline-block;
        }

        .hcard-status {
            display: flex;
            align-items: center;
            gap: 24px;
            margin-bottom: 24px;
        }

        .status-ring {
            width: 84px;
            height: 84px;
            border-radius: 50%;
            background: conic-gradient(var(--c-accent) 99.9%, rgba(255, 255, 255, 0.1) 0);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            flex-shrink: 0;
        }

        .status-ring::after {
            content: '99.9%';
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: #0A1120;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 800;
            color: var(--c-accent);
        }

        .status-num {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

        .status-label {
            font-size: 14px;
            color: var(--c-muted);
        }

        .hcard-metrics {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .hcard-metric {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: 12px;
            padding: 14px 16px;
            font-size: 13px;
            color: var(--c-muted);
        }

        .hcard-metric strong {
            display: block;
            font-size: 18px;
            color: var(--c-text);
            margin-top: 2px;
        }

        @keyframes slowZoom {
            0% {
                transform: scale(1);
            }
            100% {
                transform: scale(1.08);
            }
        }

        /* ============ Section Common ============ */
        .section {
            padding: 100px 0;
        }

        .section-soft {
            background: var(--c-bg-soft);
        }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 60px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--c-accent);
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(56, 189, 248, 0.1);
            border: 1px solid rgba(56, 189, 248, 0.2);
            margin-bottom: 18px;
        }

        .section-title {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
            color: #fff;
        }

        .section-desc {
            font-size: 16px;
            color: var(--c-muted);
            line-height: 1.8;
        }

        .section-head-left {
            text-align: left;
            margin: 0 0 50px;
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }

        .section-head-left .section-title {
            max-width: 500px;
        }

        .section-link {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--c-accent);
            font-weight: 500;
            font-size: 15px;
            transition: gap var(--transition);
            white-space: nowrap;
            padding-bottom: 6px;
            border-bottom: 1px solid rgba(56, 189, 248, 0.3);
        }

        .section-link:hover {
            gap: 16px;
        }

        /* ============ Feature Cards ============ */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius);
            padding: 32px 24px;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 24px;
            right: 24px;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--c-accent), transparent);
            transform: scaleX(0);
            transition: transform var(--transition);
        }

        .feature-card:hover {
            background: var(--c-card-hover);
            border-color: var(--c-border-hover);
            transform: translateY(-6px);
            box-shadow: var(--shadow-sm);
        }

        .feature-card:hover::after {
            transform: scaleX(1);
        }

        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: rgba(56, 189, 248, 0.12);
            border: 1px solid rgba(56, 189, 248, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--c-accent);
            margin-bottom: 20px;
            transition: all var(--transition);
        }

        .feature-card:hover .feature-icon {
            background: var(--c-accent);
            color: #0B1426;
            transform: rotateY(180deg);
        }

        .feature-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: #fff;
        }

        .feature-desc {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.7;
        }

        /* ============ Category Cards ============ */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .category-card {
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--c-card);
            border: 1px solid var(--c-border);
            transition: all var(--transition);
            position: relative;
            display: block;
            height: 100%;
        }

        .category-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow);
            border-color: var(--c-border-hover);
        }

        .category-card .card-img {
            position: relative;
            height: 200px;
            overflow: hidden;
        }

        .category-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

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

        .card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(6, 11, 24, 0.8));
        }

        .category-card .card-body {
            padding: 26px 24px 28px;
            position: relative;
        }

        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(56, 189, 248, 0.2), rgba(99, 102, 241, 0.2));
            border: 1px solid rgba(56, 189, 248, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--c-accent);
            margin-top: -52px;
            margin-bottom: 16px;
            position: relative;
            z-index: 2;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
            backdrop-filter: blur(8px);
        }

        .card-body h3 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .card-body p {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.7;
            margin-bottom: 18px;
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            color: var(--c-accent);
            transition: gap var(--transition);
        }

        .category-card:hover .card-link {
            gap: 14px;
        }

        /* ============ Stats Band ============ */
        .stats-band {
            position: relative;
            padding: 80px 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
        }

        .stats-band::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(6, 11, 24, 0.88);
        }

        .stats-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }

        .stat-item {
            padding: 20px;
        }

        .stat-num {
            font-size: 48px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 8px;
            background: linear-gradient(90deg, #7DD3FC, #818CF8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .stat-label {
            font-size: 15px;
            color: var(--c-muted);
        }

        .stat-divider {
            width: 40px;
            height: 3px;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--c-accent), transparent);
            margin: 0 auto 12px;
        }

        /* ============ Latest List ============ */
        .latest-grid {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 50px;
            align-items: start;
        }

        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-item {
            display: flex;
            gap: 20px;
            padding: 22px 24px;
            border-radius: var(--radius);
            background: var(--c-card);
            border: 1px solid var(--c-border);
            transition: all var(--transition);
            align-items: flex-start;
        }

        .news-item:hover {
            background: var(--c-card-hover);
            border-color: var(--c-border-hover);
            transform: translateX(6px);
            box-shadow: var(--shadow-sm);
        }

        .news-badge {
            flex-shrink: 0;
            display: inline-block;
            padding: 4px 12px;
            border-radius: 6px;
            font-size: 12px;
            font-weight: 600;
            color: var(--c-accent);
            background: rgba(56, 189, 248, 0.1);
            border: 1px solid rgba(56, 189, 248, 0.2);
            white-space: nowrap;
            margin-top: 3px;
        }

        .news-content {
            flex: 1;
            min-width: 0;
        }

        .news-content h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--c-text);
            margin-bottom: 6px;
            line-height: 1.5;
            transition: color var(--transition);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-item:hover .news-content h4 {
            color: var(--c-accent);
        }

        .news-content p {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 8px;
        }

        .news-meta {
            font-size: 13px;
            color: rgba(140, 163, 199, 0.7);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .news-meta i {
            font-size: 12px;
            margin-right: 4px;
        }

        .empty-tip {
            text-align: center;
            padding: 60px 20px;
            color: var(--c-muted);
            font-size: 16px;
            border: 1px dashed var(--c-border);
            border-radius: var(--radius);
        }

        /* ============ Steps ============ */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
        }

        .steps-grid::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.3), transparent);
            z-index: 0;
        }

        .step-item {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 20px;
        }

        .step-num {
            width: 80px;
            height: 80px;
            margin: 0 auto 24px;
            border-radius: 50%;
            background: rgba(10, 17, 32, 0.9);
            border: 2px solid rgba(56, 189, 248, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 800;
            color: var(--c-accent);
            box-shadow: 0 0 30px rgba(56, 189, 248, 0.15);
            transition: all var(--transition);
        }

        .step-item:hover .step-num {
            border-color: var(--c-accent);
            box-shadow: 0 0 40px rgba(56, 189, 248, 0.4);
            transform: scale(1.06);
        }

        .step-title {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .step-desc {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.7;
            max-width: 220px;
            margin: 0 auto;
        }

        /* ============ Featured ============ */
        .featured-grid {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        .featured-item {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--c-card);
            border: 1px solid var(--c-border);
            transition: all var(--transition);
        }

        .featured-item:hover {
            border-color: var(--c-border-hover);
            box-shadow: var(--shadow-sm);
        }

        .featured-item.reverse .featured-img {
            order: 2;
        }

        .featured-img {
            position: relative;
            min-height: 280px;
            overflow: hidden;
        }

        .featured-img img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .featured-item:hover .featured-img img {
            transform: scale(1.05);
        }

        .featured-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, transparent 60%, rgba(6, 11, 24, 0.3));
        }

        .featured-body {
            padding: 48px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .featured-body .section-tag {
            align-self: flex-start;
        }

        .featured-body h3 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            line-height: 1.4;
        }

        .featured-body p {
            font-size: 15px;
            color: var(--c-muted);
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .featured-list {
            list-style: none;
            margin-bottom: 24px;
        }

        .featured-list li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 14px;
            color: var(--c-muted);
            padding: 6px 0;
        }

        .featured-list li i {
            color: var(--c-accent);
            font-size: 13px;
        }

        /* ============ FAQ ============ */
        .faq-grid {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 50px;
            align-items: start;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

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

        .faq-item:hover {
            border-color: var(--c-border-hover);
        }

        .faq-item details {
            padding: 0;
        }

        .faq-item summary {
            padding: 22px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--c-text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            list-style: none;
            transition: color var(--transition);
            user-select: none;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '+';
            font-size: 22px;
            font-weight: 400;
            color: var(--c-accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item details[open] summary::after {
            transform: rotate(45deg);
        }

        .faq-item summary:hover {
            color: var(--c-accent);
        }

        .faq-answer {
            padding: 0 24px 22px;
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.8;
        }

        /* ============ CTA ============ */
        .cta-band {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            padding: 80px 60px;
            text-align: center;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
        }

        .cta-band::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(6, 11, 24, 0.94), rgba(10, 17, 32, 0.8));
        }

        .cta-inner {
            position: relative;
            z-index: 1;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-inner .section-tag {
            justify-content: center;
        }

        .cta-inner h2 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .cta-inner p {
            font-size: 16px;
            color: var(--c-muted);
            margin-bottom: 32px;
            line-height: 1.8;
        }

        /* ============ Footer ============ */
        .site-footer {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 80px;
            background: var(--c-bg-soft);
            margin-top: 100px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
            gap: 48px;
            padding-bottom: 60px;
        }

        .footer-brand h4 {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .footer-col h5 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-col ul {
            list-style: none;
        }

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

        .footer-col ul a {
            font-size: 14px;
            color: var(--c-muted);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

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

        .footer-copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 24px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 13px;
            color: rgba(140, 163, 199, 0.6);
            flex-wrap: wrap;
        }

        .footer-copyright a {
            color: rgba(140, 163, 199, 0.8);
        }

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

        /* ============ Focus states ============ */
        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 2px solid var(--c-accent);
            outline-offset: 3px;
            border-radius: 4px;
        }

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 42px;
            }

            .hero-content {
                grid-template-columns: 1fr;
                gap: 48px;
                padding-top: 60px;
            }

            .hero-card {
                max-width: 480px;
                width: 100%;
            }

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

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

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 40px 24px;
            }

            .latest-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }

            .steps-grid::before {
                display: none;
            }

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

            .featured-item {
                grid-template-columns: 1fr;
            }

            .featured-item.reverse .featured-img {
                order: 0;
            }

            .featured-img {
                min-height: 220px;
            }

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

            .section {
                padding: 80px 0;
            }
        }

        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }

            .menu-toggle {
                display: flex;
            }

            .header-inner {
                height: 68px;
            }

            .logo {
                font-size: 18px;
            }

            .hero {
                min-height: auto;
            }

            .hero h1 {
                font-size: 34px;
            }

            .hero-sub {
                font-size: 17px;
            }

            .hero-desc {
                font-size: 15px;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .section-title {
                font-size: 28px;
            }

            .section {
                padding: 64px 0;
            }

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

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

            .stats-band {
                background-attachment: scroll;
            }

            .stat-num {
                font-size: 36px;
            }

            .cta-band {
                padding: 50px 24px;
            }

            .cta-inner h2 {
                font-size: 28px;
            }

            .btn-lg {
                padding: 14px 28px;
                font-size: 15px;
            }

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

            .footer-copyright {
                flex-direction: column;
                text-align: center;
            }

            .featured-body {
                padding: 32px 24px;
            }

            .section-head-left {
                flex-direction: column;
                align-items: flex-start;
            }

            .steps-grid {
                grid-template-columns: 1fr;
                max-width: 320px;
                margin: 0 auto;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 18px;
            }

            .hero-content {
                padding-top: 40px;
                padding-bottom: 50px;
            }

            .hero h1 {
                font-size: 28px;
                letter-spacing: 1px;
            }

            .hero-badge {
                font-size: 13px;
            }

            .hcard-metrics {
                grid-template-columns: 1fr 1fr;
            }

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

            .news-item {
                flex-direction: column;
                gap: 12px;
            }

            .news-badge {
                align-self: flex-start;
            }

            .cta-band {
                padding: 40px 20px;
            }

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

            .btn {
                padding: 11px 22px;
                font-size: 15px;
            }

            .logo-text {
                font-size: 17px;
            }
        }

/* roulang page: category1 */
:root {
            --c-primary: #7c3aed;
            --c-primary-dark: #5b21b6;
            --c-accent: #f59e0b;
            --c-night: #0b1220;
            --c-bg: #f8fafc;
            --c-text: #0f172a;
            --c-muted: #64748b;
            --c-border: #e2e8f0;
            --radius: 16px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, .06);
            --shadow-md: 0 10px 36px rgba(15, 23, 42, .1);
            --shadow-lg: 0 24px 60px rgba(15, 23, 42, .16);
            --container-max: 1200px;
            --header-h: 76px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            background: var(--c-bg);
            color: var(--c-text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .25s ease;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section {
            padding: 88px 0;
            position: relative;
        }
        .section-head {
            max-width: 680px;
            margin-bottom: 48px;
        }
        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(124, 58, 237, .1);
            color: var(--c-primary);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .06em;
            padding: 7px 16px;
            border-radius: 999px;
            margin-bottom: 14px;
            border: 1px solid rgba(124, 58, 237, .15);
        }
        .section-title {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -.02em;
            color: var(--c-text);
        }
        .section-desc {
            margin-top: 16px;
            color: var(--c-muted);
            font-size: 16px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--header-h);
            background: rgba(255, 255, 255, .86);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(226, 232, 240, .8);
            box-shadow: 0 1px 8px rgba(15, 23, 42, .04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
            gap: 20px;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            font-weight: 800;
            font-size: 20px;
            letter-spacing: -.01em;
            color: var(--c-text);
        }
        .brand-logo .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, #7c3aed, #4c1d95);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 17px;
            box-shadow: 0 6px 18px rgba(124, 58, 237, .35);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 9px 16px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            color: #334155;
            transition: all .25s ease;
        }
        .nav-link i {
            color: var(--c-muted);
            transition: color .25s ease;
        }
        .nav-link:hover {
            color: var(--c-primary);
            background: rgba(124, 58, 237, .07);
        }
        .nav-link:hover i {
            color: var(--c-primary);
        }
        .nav-link.active {
            color: var(--c-primary);
            background: rgba(124, 58, 237, .1);
        }
        .nav-link.active i {
            color: var(--c-primary);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-left: 12px;
            padding: 10px 22px;
            border-radius: 12px;
            background: linear-gradient(135deg, #7c3aed, #5b21b6);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            box-shadow: 0 8px 22px rgba(124, 58, 237, .35);
            transition: all .28s ease;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(124, 58, 237, .42);
            color: #fff;
        }
        .nav-cta:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(124, 58, 237, .3);
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(124, 58, 237, .08);
            color: var(--c-primary);
            font-size: 19px;
            align-items: center;
            justify-content: center;
            transition: background .25s ease;
        }
        .page-banner {
            position: relative;
            min-height: 360px;
            display: flex;
            align-items: center;
            background: linear-gradient(120deg, rgba(11, 18, 32, .92), rgba(76, 29, 149, .78)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
            overflow: hidden;
            padding: 70px 0;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            right: -80px;
            top: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(245, 158, 11, .22), transparent 70%);
        }
        .page-banner .page-title {
            font-size: clamp(32px, 5vw, 52px);
            font-weight: 800;
            letter-spacing: -.02em;
            line-height: 1.2;
        }
        .page-banner .page-subtitle {
            max-width: 640px;
            margin-top: 16px;
            font-size: 17px;
            color: rgba(255, 255, 255, .82);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, .7);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, .75);
            transition: color .25s ease;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: 12px;
            font-weight: 700;
            font-size: 15px;
            transition: all .28s ease;
            border: 2px solid transparent;
        }
        .btn-primary {
            background: linear-gradient(135deg, #7c3aed, #5b21b6);
            color: #fff;
            box-shadow: 0 8px 24px rgba(124, 58, 237, .32);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 34px rgba(124, 58, 237, .4);
            color: #fff;
        }
        .btn-ghost {
            background: transparent;
            border-color: #cbd5e1;
            color: #334155;
        }
        .btn-ghost:hover {
            border-color: var(--c-primary);
            color: var(--c-primary);
            background: rgba(124, 58, 237, .04);
        }
        .btn-light {
            background: #fff;
            color: var(--c-primary-dark);
            box-shadow: 0 8px 24px rgba(15, 23, 42, .14);
        }
        .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 30px rgba(15, 23, 42, .2);
            color: var(--c-primary);
        }
        .about-card {
            border-radius: 20px;
            background: #fff;
            border: 1px solid var(--c-border);
            box-shadow: var(--shadow-sm);
            padding: 32px;
            height: 100%;
            transition: box-shadow .3s ease, transform .3s ease;
        }
        .about-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .news-card {
            display: flex;
            gap: 20px;
            background: #fff;
            border: 1px solid var(--c-border);
            border-radius: 18px;
            padding: 20px;
            transition: box-shadow .3s ease, transform .3s ease;
        }
        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .news-card img {
            width: 180px;
            height: 128px;
            object-fit: cover;
            border-radius: 12px;
            flex-shrink: 0;
        }
        .badge-tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(124, 58, 237, .1);
            color: var(--c-primary);
            border: 1px solid rgba(124, 58, 237, .12);
        }
        .badge-hot {
            background: rgba(245, 158, 11, .12);
            color: #d97706;
            border-color: rgba(245, 158, 11, .2);
        }
        .side-card {
            background: #fff;
            border: 1px solid var(--c-border);
            border-radius: 18px;
            padding: 26px;
            box-shadow: var(--shadow-sm);
        }
        .topic-list li {
            padding: 10px 14px;
            border-radius: 10px;
            font-size: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
            color: #334155;
            transition: background .25s ease, color .25s ease;
        }
        .topic-list li:hover {
            background: rgba(124, 58, 237, .06);
            color: var(--c-primary);
        }
        .topic-list li .topic-num {
            width: 24px;
            height: 24px;
            border-radius: 8px;
            background: rgba(124, 58, 237, .1);
            color: var(--c-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 700;
        }
        .stat-band {
            background: linear-gradient(130deg, #0b1220 0%, #27124d 100%);
            position: relative;
            overflow: hidden;
        }
        .stat-band::before {
            content: '';
            position: absolute;
            left: -100px;
            bottom: -100px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(124, 58, 237, .3), transparent 70%);
        }
        .stat-card {
            text-align: center;
            padding: 36px 20px;
            border-radius: 20px;
            border: 1px solid rgba(255, 255, 255, .1);
            backdrop-filter: blur(6px);
            transition: transform .3s ease, border-color .3s ease;
        }
        .stat-card:hover {
            transform: translateY(-6px);
            border-color: rgba(255, 255, 255, .24);
        }
        .stat-card .num {
            font-size: clamp(34px, 4vw, 48px);
            font-weight: 800;
            color: #fbbf24;
            line-height: 1.2;
        }
        .stat-card .label {
            margin-top: 6px;
            color: rgba(255, 255, 255, .7);
            font-size: 15px;
        }
        .process-step {
            position: relative;
            padding: 28px;
            background: #fff;
            border-radius: 20px;
            border: 1px solid var(--c-border);
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s ease, transform .3s ease;
        }
        .process-step:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .process-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: linear-gradient(135deg, #7c3aed, #4c1d95);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 18px;
            box-shadow: 0 8px 20px rgba(124, 58, 237, .3);
        }
        .process-arrow {
            position: absolute;
            right: -18px;
            top: 50%;
            transform: translateY(-50%);
            color: rgba(124, 58, 237, .35);
            font-size: 22px;
            z-index: 2;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--c-border);
            border-radius: 16px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color .3s ease, box-shadow .3s ease;
        }
        .faq-item:hover {
            border-color: rgba(124, 58, 237, .3);
            box-shadow: var(--shadow-sm);
        }
        .faq-q {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 17px;
            font-weight: 700;
            color: var(--c-text);
            text-align: left;
            background: transparent;
            transition: color .25s ease;
        }
        .faq-q i {
            color: var(--c-primary);
            font-size: 18px;
            transition: transform .35s ease;
            flex-shrink: 0;
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            padding: 0 24px;
            color: var(--c-muted);
            font-size: 15px;
            line-height: 1.8;
            transition: max-height .4s ease, padding .4s ease;
        }
        .faq-item.open .faq-a {
            max-height: 220px;
            padding: 0 24px 20px;
        }
        .faq-item.open .faq-q i {
            transform: rotate(45deg);
        }
        .cta-box {
            position: relative;
            border-radius: 28px;
            background: linear-gradient(120deg, #1e1b4b, #4c1d95);
            padding: 60px 56px;
            color: #fff;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            right: -60px;
            top: -60px;
            width: 200px;
            height: 200px;
            border-radius: 40px;
            background: radial-gradient(circle, rgba(245, 158, 11, .25), transparent 70%);
        }
        .site-footer {
            background: #0b1220;
            color: #94a3b8;
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
        }
        .footer-brand h4 {
            font-size: 22px;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            margin-bottom: 20px;
            max-width: 360px;
        }
        .footer-col h5 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
            font-size: 14px;
        }
        .footer-col ul li a:hover {
            color: #fbbf24;
        }
        .footer-copyright {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: #64748b;
        }
        @media (max-width:1024px) {
            .main-nav {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 18px 24px 24px;
                gap: 8px;
                border-bottom: 1px solid var(--c-border);
                box-shadow: 0 20px 40px rgba(15, 23, 42, .1);
                display: none;
                max-height: calc(100vh - var(--header-h));
                overflow-y: auto;
            }
            .main-nav.open {
                display: flex;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .nav-cta {
                margin-left: 0;
                justify-content: center;
                margin-top: 8px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .news-card img {
                width: 150px;
                height: 110px;
            }
        }
        @media (max-width:768px) {
            .section {
                padding: 64px 0;
            }
            .header-inner {
                gap: 12px;
            }
            .brand-logo {
                font-size: 17px;
            }
            .brand-logo .logo-icon {
                width: 36px;
                height: 36px;
                font-size: 15px;
            }
            .news-card {
                flex-direction: column;
            }
            .news-card img {
                width: 100%;
                height: 180px;
            }
            .page-banner {
                min-height: 300px;
                padding: 50px 0;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .process-arrow {
                display: none;
            }
        }
        @media (max-width:520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .brand-logo {
                font-size: 15px;
            }
            .brand-logo .logo-icon {
                width: 32px;
                height: 32px;
                border-radius: 9px;
                font-size: 14px;
            }
            .nav-link {
                font-size: 14px;
                padding: 10px 12px;
            }
            .btn {
                padding: 11px 18px;
                font-size: 14px;
            }
            .section-title {
                font-size: 26px;
            }
            .footer-copyright {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }
        }

/* roulang page: article */
:root {
        --c-primary: #6366f1;
        --c-primary-dark: #4f46e5;
        --c-primary-light: #eef2ff;
        --c-accent: #22d3ee;
        --c-accent-dark: #0891b2;
        --c-bg: #f8fafc;
        --c-bg-deep: #0f172a;
        --c-bg-card: #ffffff;
        --c-text: #1e293b;
        --c-text-light: #64748b;
        --c-text-weak: #94a3b8;
        --c-border: #e2e8f0;
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-lg: 20px;
        --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
        --shadow-md: 0 6px 20px rgba(15, 23, 42, 0.08);
        --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
        --sp-section: 72px;
        --sp-wrap: 24px;
    }

    *,
    *::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(--c-bg);
        color: var(--c-text);
        line-height: 1.75;
        font-size: 16px;
        -webkit-font-smoothing: antialiased;
    }

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

    a {
        color: inherit;
        text-decoration: none;
        transition: color 0.2s ease;
    }

    button,
    input {
        font-family: inherit;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 var(--sp-wrap);
    }

    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        background: rgba(255, 255, 255, 0.86);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        border-bottom: 1px solid rgba(226, 232, 240, 0.7);
        box-shadow: var(--shadow-sm);
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 72px;
        gap: 16px;
    }

    .logo {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        font-size: 20px;
        font-weight: 800;
        color: var(--c-text);
        letter-spacing: -0.2px;
        white-space: nowrap;
        flex-shrink: 0;
    }

    .logo-icon {
        width: 38px;
        height: 38px;
        border-radius: 11px;
        background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
        color: #fff;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
        flex-shrink: 0;
    }

    .main-nav {
        display: flex;
        align-items: center;
        gap: 4px;
    }

    .nav-link,
    .nav-cta {
        padding: 9px 16px;
        border-radius: var(--radius-sm);
        font-size: 15px;
        font-weight: 600;
        display: inline-flex;
        align-items: center;
        gap: 7px;
        white-space: nowrap;
        transition: all 0.2s ease;
    }

    .nav-link {
        color: var(--c-text-light);
    }

    .nav-link i {
        color: var(--c-primary);
        opacity: 0.8;
        font-size: 14px;
    }

    .nav-link:hover {
        color: var(--c-primary-dark);
        background: var(--c-primary-light);
    }

    .nav-link.active {
        color: var(--c-primary-dark);
        background: var(--c-primary-light);
        font-weight: 700;
    }

    .nav-cta {
        background: linear-gradient(135deg, var(--c-primary), var(--c-accent-dark));
        color: #fff;
        border-radius: 30px;
        padding: 9px 20px;
        margin-left: 8px;
        box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
    }

    .nav-cta:hover {
        transform: translateY(-1px);
        box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
        color: #fff;
    }

    .nav-toggle {
        display: none;
        width: 42px;
        height: 42px;
        border: 1px solid var(--c-border);
        border-radius: 10px;
        background: #fff;
        cursor: pointer;
        font-size: 18px;
        color: var(--c-text);
        align-items: center;
        justify-content: center;
        transition: all 0.2s ease;
    }

    .nav-toggle:hover {
        border-color: var(--c-primary);
        color: var(--c-primary);
    }

    .article-hero {
        position: relative;
        padding: 150px 0 80px;
        background-size: cover;
        background-position: center;
        background-color: var(--c-bg-deep);
        color: #fff;
        isolation: isolate;
    }

    .article-hero::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(100deg, rgba(15, 23, 42, 0.92), rgba(15, 23, 42, 0.68) 50%, rgba(99, 102, 241, 0.35));
        z-index: -1;
    }

    .breadcrumb {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        list-style: none;
        font-size: 14px;
        color: rgba(255, 255, 255, 0.75);
        margin-bottom: 22px;
        padding: 0;
    }

    .breadcrumb li {
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .breadcrumb li+li::before {
        content: "/";
        color: rgba(255, 255, 255, 0.35);
    }

    .breadcrumb a {
        color: rgba(255, 255, 255, 0.8);
    }

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

    .article-cat-badge {
        display: inline-flex;
        align-items: center;
        gap: 7px;
        background: rgba(99, 102, 241, 0.85);
        color: #fff;
        padding: 6px 16px;
        border-radius: 30px;
        font-size: 13px;
        font-weight: 700;
        letter-spacing: 0.3px;
        margin-bottom: 18px;
        box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
    }

    .article-hero h1 {
        font-size: 34px;
        font-weight: 800;
        line-height: 1.4;
        max-width: 820px;
        margin-bottom: 20px;
        letter-spacing: -0.4px;
    }

    .article-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 16px;
        font-size: 14px;
        color: rgba(255, 255, 255, 0.75);
    }

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

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

    .article-section {
        padding: 64px 0;
    }

    .article-layout {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 320px;
        gap: 40px;
        align-items: start;
    }

    .article-content-card {
        background: var(--c-bg-card);
        border-radius: var(--radius-lg);
        border: 1px solid var(--c-border);
        box-shadow: var(--shadow-md);
        padding: 40px;
        overflow: hidden;
    }

    .article-cover {
        border-radius: 14px;
        margin-bottom: 28px;
        width: 100%;
        object-fit: cover;
    }

    .article-body {
        font-size: 16.5px;
        line-height: 1.95;
        color: #334155;
    }

    .article-body h2,
    .article-body h3,
    .article-body h4 {
        color: var(--c-text);
        margin: 1.4em 0 0.6em;
        line-height: 1.5;
        font-weight: 700;
    }

    .article-body h2 {
        font-size: 24px;
    }

    .article-body h3 {
        font-size: 20px;
    }

    .article-body p {
        margin: 0 0 1.2em;
    }

    .article-body ul,
    .article-body ol {
        margin: 0 0 1.4em 1.4em;
    }

    .article-body li {
        margin-bottom: 0.5em;
    }

    .article-body a {
        color: var(--c-primary);
        border-bottom: 1px solid rgba(99, 102, 241, 0.4);
    }

    .article-body a:hover {
        color: var(--c-primary-dark);
        border-bottom-color: var(--c-primary);
    }

    .article-body blockquote {
        border-left: 4px solid var(--c-primary);
        background: var(--c-primary-light);
        padding: 14px 20px;
        border-radius: 0 10px 10px 0;
        margin: 1.4em 0;
        color: #475569;
    }

    .article-body img {
        border-radius: 12px;
        margin: 1.2em 0;
    }

    .article-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        margin-top: 32px;
        padding-top: 24px;
        border-top: 1px solid var(--c-border);
    }

    .tag-item {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: var(--c-primary-light);
        color: var(--c-primary-dark);
        padding: 6px 14px;
        border-radius: 30px;
        font-size: 13px;
        font-weight: 600;
    }

    .empty-state {
        text-align: center;
        padding: 60px 20px;
    }

    .empty-state i {
        font-size: 52px;
        color: var(--c-text-weak);
        margin-bottom: 16px;
    }

    .empty-state h2 {
        font-size: 24px;
        color: var(--c-text);
        margin-bottom: 12px;
    }

    .empty-state p {
        color: var(--c-text-light);
        margin-bottom: 24px;
    }

    .side-card {
        background: var(--c-bg-card);
        border: 1px solid var(--c-border);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        padding: 24px;
        margin-bottom: 24px;
    }

    .side-card h4 {
        font-size: 16px;
        font-weight: 700;
        color: var(--c-text);
        margin-bottom: 16px;
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .side-card h4 i {
        color: var(--c-primary);
    }

    .side-info-list {
        list-style: none;
        padding: 0;
        margin: 0;
    }

    .side-info-list li {
        display: flex;
        justify-content: space-between;
        padding: 9px 0;
        border-bottom: 1px dashed var(--c-border);
        font-size: 14px;
    }

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

    .side-info-list span {
        color: var(--c-text-light);
    }

    .side-info-list strong {
        color: var(--c-text);
        font-weight: 600;
        max-width: 180px;
        text-align: right;
    }

    .side-nav-list {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .side-nav-list a {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px 16px;
        border-radius: 10px;
        background: var(--c-primary-light);
        color: var(--c-primary-dark);
        font-weight: 600;
        font-size: 14px;
        transition: background 0.2s, transform 0.2s;
    }

    .side-nav-list a:hover {
        background: var(--c-primary);
        color: #fff;
        transform: translateX(4px);
    }

    .side-nav-list a i {
        font-size: 13px;
    }

    .recommend-section {
        background: var(--c-bg-card);
        border-top: 1px solid var(--c-border);
        padding: 72px 0;
    }

    .section-head {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        gap: 20px;
        margin-bottom: 36px;
    }

    .section-eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 7px;
        color: var(--c-primary);
        font-size: 13px;
        font-weight: 700;
        letter-spacing: 1.5px;
        text-transform: uppercase;
        margin-bottom: 8px;
    }

    .section-head h2 {
        font-size: 30px;
        font-weight: 800;
        color: var(--c-text);
        letter-spacing: -0.4px;
    }

    .section-head p {
        color: var(--c-text-light);
        font-size: 15px;
        max-width: 560px;
    }

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

    .post-card {
        background: var(--c-bg-card);
        border: 1px solid var(--c-border);
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        transition: box-shadow 0.25s ease, transform 0.25s ease;
    }

    .post-card:hover {
        box-shadow: var(--shadow-lg);
        transform: translateY(-5px);
    }

    .post-card-cover {
        width: 100%;
        height: 178px;
        object-fit: cover;
        border-bottom: 1px solid var(--c-border);
    }

    .post-card-body {
        padding: 22px;
    }

    .post-card-tag {
        font-size: 12px;
        color: var(--c-primary);
        background: var(--c-primary-light);
        padding: 3px 10px;
        border-radius: 20px;
        font-weight: 700;
        display: inline-block;
        margin-bottom: 12px;
    }

    .post-card-body h3 {
        font-size: 17px;
        line-height: 1.5;
        font-weight: 700;
        color: var(--c-text);
        margin-bottom: 10px;
    }

    .post-card-body p {
        font-size: 14px;
        color: var(--c-text-light);
        line-height: 1.7;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .category-section {
        padding: 72px 0;
        background: linear-gradient(180deg, var(--c-bg) 0%, var(--c-primary-light) 100%);
    }

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

    .category-card {
        background: var(--c-bg-card);
        border-radius: var(--radius-lg);
        border: 1px solid var(--c-border);
        padding: 30px;
        box-shadow: var(--shadow-sm);
        transition: box-shadow 0.25s, transform 0.25s;
        display: block;
    }

    .category-card:hover {
        box-shadow: var(--shadow-lg);
        transform: translateY(-4px);
    }

    .category-card-icon {
        width: 52px;
        height: 52px;
        border-radius: 14px;
        background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
        color: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 21px;
        margin-bottom: 18px;
        box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
    }

    .category-card h3 {
        font-size: 19px;
        font-weight: 700;
        margin-bottom: 10px;
        color: var(--c-text);
    }

    .category-card p {
        font-size: 14px;
        color: var(--c-text-light);
        line-height: 1.7;
        margin-bottom: 18px;
    }

    .category-card .card-link {
        font-size: 14px;
        font-weight: 700;
        color: var(--c-primary);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    .category-card .card-link i {
        transition: transform 0.2s;
    }

    .category-card:hover .card-link i {
        transform: translateX(4px);
    }

    .faq-section {
        padding: 72px 0;
        background: var(--c-bg-card);
        border-top: 1px solid var(--c-border);
    }

    .faq-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 18px;
    }

    .faq-item {
        border: 1px solid var(--c-border);
        border-radius: var(--radius-md);
        background: var(--c-bg);
        padding: 22px 24px;
        transition: border-color 0.2s, box-shadow 0.2s;
    }

    .faq-item:hover {
        border-color: var(--c-primary);
        box-shadow: var(--shadow-sm);
    }

    .faq-item h3 {
        font-size: 16px;
        font-weight: 700;
        color: var(--c-text);
        margin-bottom: 8px;
        display: flex;
        align-items: center;
        gap: 9px;
    }

    .faq-item h3 i {
        color: var(--c-primary);
        font-size: 14px;
    }

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

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

    .cta-box {
        background: linear-gradient(120deg, var(--c-bg-deep), #1e1b4b);
        border-radius: var(--radius-lg);
        padding: 50px 56px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 30px;
        color: #fff;
        box-shadow: var(--shadow-lg);
        position: relative;
        overflow: hidden;
    }

    .cta-box::after {
        content: "";
        position: absolute;
        right: -60px;
        top: -60px;
        width: 220px;
        height: 220px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(34, 211, 238, 0.25), transparent 70%);
    }

    .cta-content h2 {
        font-size: 26px;
        font-weight: 800;
        margin-bottom: 10px;
        line-height: 1.4;
    }

    .cta-content p {
        color: rgba(255, 255, 255, 0.8);
        font-size: 15px;
        max-width: 520px;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        border-radius: 30px;
        font-weight: 700;
        padding: 12px 26px;
        font-size: 15px;
        border: none;
        cursor: pointer;
        transition: all 0.2s ease;
        line-height: 1.5;
    }

    .btn i {
        font-size: 14px;
    }

    .btn-primary {
        background: linear-gradient(135deg, var(--c-primary), var(--c-accent-dark));
        color: #fff;
        box-shadow: 0 4px 16px rgba(99, 102, 241, 0.35);
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(99, 102, 241, 0.45);
        color: #fff;
    }

    .btn-ghost {
        background: rgba(255, 255, 255, 0.12);
        color: #fff;
        border: 1px solid rgba(255, 255, 255, 0.3);
        backdrop-filter: blur(6px);
    }

    .btn-ghost:hover {
        background: rgba(255, 255, 255, 0.22);
        color: #fff;
    }

    .btn-light {
        background: #fff;
        color: var(--c-primary-dark);
        box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
    }

    .btn-light:hover {
        transform: translateY(-2px);
        color: var(--c-primary-dark);
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    }

    .site-footer {
        background: var(--c-bg-deep);
        color: rgba(255, 255, 255, 0.75);
        padding: 72px 0 0;
        border-top: 3px solid var(--c-primary);
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1.4fr 1fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 48px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .footer-brand h4 {
        color: #fff;
        font-size: 20px;
        font-weight: 800;
        display: flex;
        align-items: center;
        gap: 10px;
        margin-bottom: 16px;
    }

    .footer-brand p {
        font-size: 14px;
        line-height: 1.8;
        color: rgba(255, 255, 255, 0.65);
        margin-bottom: 20px;
        max-width: 360px;
    }

    .footer-col h5 {
        color: #fff;
        font-size: 15px;
        font-weight: 700;
        margin-bottom: 16px;
        letter-spacing: 0.4px;
    }

    .footer-col ul {
        list-style: none;
        padding: 0;
        margin: 0;
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .footer-col li {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.65);
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .footer-col a {
        color: rgba(255, 255, 255, 0.65);
        transition: color 0.2s, padding-left 0.2s;
    }

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

    .footer-copyright {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        gap: 10px;
        padding: 22px 0;
        font-size: 13px;
        color: rgba(255, 255, 255, 0.45);
    }

    .footer-copyright span {
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    .btn:focus,
    .nav-link:focus,
    .nav-cta:focus,
    .nav-toggle:focus,
    .post-card:focus,
    .category-card:focus {
        outline: 3px solid rgba(99, 102, 241, 0.4);
        outline-offset: 2px;
    }

    @media (max-width: 1024px) {
        .article-layout {
            grid-template-columns: 1fr;
        }

        .article-side {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
            order: -1;
        }

        .side-card {
            margin-bottom: 0;
        }

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

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

    @media (max-width: 768px) {
        :root {
            --sp-section: 52px;
        }

        .header-inner {
            height: 64px;
        }

        .logo {
            font-size: 18px;
        }

        .main-nav {
            position: absolute;
            top: 64px;
            left: 0;
            right: 0;
            background: #fff;
            flex-direction: column;
            align-items: stretch;
            gap: 0;
            padding: 12px 20px 20px;
            border-bottom: 1px solid var(--c-border);
            box-shadow: var(--shadow-md);
            display: none;
        }

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

        .main-nav .nav-link,
        .main-nav .nav-cta {
            width: 100%;
            justify-content: flex-start;
            padding: 13px 16px;
            border-radius: 10px;
        }

        .main-nav .nav-cta {
            margin-left: 0;
            margin-top: 8px;
            justify-content: center;
        }

        .nav-toggle {
            display: inline-flex;
        }

        .article-hero {
            padding: 110px 0 52px;
        }

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

        .article-content-card {
            padding: 26px 22px;
        }

        .article-body {
            font-size: 15.5px;
        }

        .article-side {
            grid-template-columns: 1fr;
            order: 0;
        }

        .side-card {
            margin-bottom: 16px;
            padding: 18px;
        }

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

        .section-head {
            flex-direction: column;
            align-items: flex-start;
            gap: 10px;
        }

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

        .cta-box {
            flex-direction: column;
            padding: 34px 26px;
            text-align: center;
        }

        .cta-content p {
            margin: 0 auto;
        }

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

        .footer-copyright {
            flex-direction: column;
            justify-content: center;
            text-align: center;
        }
    }

    @media (max-width: 520px) {
        .header-inner {
            gap: 8px;
        }

        .logo {
            font-size: 16px;
            gap: 8px;
        }

        .logo-icon {
            width: 34px;
            height: 34px;
            font-size: 14px;
        }

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

        .article-hero h1 {
            font-size: 23px;
        }

        .recommend-grid,
        .category-grid {
            grid-template-columns: 1fr;
        }

        .post-card-cover {
            height: 160px;
        }

        .cta-box {
            padding: 28px 20px;
        }

        .btn {
            width: 100%;
        }
    }

/* roulang page: category3 */
:root {
    --c-primary: #4F46E5;
    --c-primary-light: #818CF8;
    --c-secondary: #0EA5E9;
    --c-accent: #F59E0B;
    --c-dark: #0F172A;
    --c-bg: #F8FAFC;
    --c-bg-alt: #EEF2FF;
    --c-card: #FFFFFF;
    --c-text: #1E293B;
    --c-text-weak: #64748B;
    --c-border: #E2E8F0;
    --radius: 18px;
    --radius-sm: 10px;
    --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
    --transition: all 0.3s ease;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--c-bg);
    color: var(--c-text);
    line-height: 1.7;
    margin: 0;
    -webkit-font-smoothing: antialiased;
  }

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

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

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

  button,
  input {
    font-family: inherit;
  }

  #app-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--c-border);
  }

  .navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 72px;
    gap: 16px;
  }

  .brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 800;
    color: var(--c-dark);
    white-space: nowrap;
    flex-shrink: 0;
  }

  .brand-logo .logo-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
    color: #fff;
    border-radius: 12px;
    font-size: 17px;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.35);
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--c-text);
    border-radius: 10px;
    transition: var(--transition);
    white-space: nowrap;
  }

  .nav-link i {
    font-size: 14px;
    color: var(--c-text-weak);
    transition: var(--transition);
  }

  .nav-link:hover {
    background: var(--c-bg-alt);
    color: var(--c-primary);
  }

  .nav-link:hover i {
    color: var(--c-primary);
  }

  .nav-link.active {
    background: var(--c-bg-alt);
    color: var(--c-primary);
    font-weight: 700;
  }

  .nav-link.active i {
    color: var(--c-primary);
  }

  .nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 22px;
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
    border-radius: 10px;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
    transition: var(--transition);
    white-space: nowrap;
  }

  .nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
    color: #fff;
  }

  .navbar-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--c-border);
    border-radius: 10px;
    background: transparent;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 20px;
    color: var(--c-dark);
  }

  /* Page Hero Banner */
  .page-hero {
    position: relative;
    padding: 84px 0 72px;
    background: linear-gradient(120deg, #0F172A 0%, #1E293B 50%, #312E81 100%);
    overflow: hidden;
  }

  .page-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    opacity: 0.18;
  }

  .page-hero::after {
    content: "";
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.3) 0%, transparent 70%);
    pointer-events: none;
  }

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

  .hero-breadcrumb {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 16px;
  }

  .hero-breadcrumb a {
    color: rgba(255, 255, 255, 0.8);
  }

  .hero-breadcrumb a:hover {
    color: #fff;
  }

  .hero-breadcrumb i {
    font-size: 10px;
    opacity: 0.5;
  }

  .page-hero h1 {
    font-size: 44px;
    font-weight: 800;
    color: #fff;
    line-height: 1.25;
    margin: 0 0 16px;
    letter-spacing: -0.5px;
  }

  .page-hero h1 span {
    color: var(--c-primary-light);
  }

  .page-hero p.hero-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85);
    max-width: 640px;
    line-height: 1.7;
    margin-bottom: 32px;
  }

  .hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 28px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
  }

  .btn-primary {
    background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
    color: #fff;
    box-shadow: 0 4px 16px rgba(79, 70, 229, 0.35);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(79, 70, 229, 0.45);
  }

  .btn-outline {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.4);
    color: #fff;
  }

  .btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.6);
  }

  .section {
    padding: 96px 0;
  }

  .section-alt {
    background: var(--c-card);
  }

  .section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 56px;
  }

  .section-head .section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--c-primary);
    background: var(--c-bg-alt);
    padding: 6px 16px;
    border-radius: 30px;
    margin-bottom: 16px;
  }

  .section-head h2 {
    font-size: 34px;
    font-weight: 800;
    color: var(--c-dark);
    margin: 0 0 14px;
    line-height: 1.3;
    letter-spacing: -0.3px;
  }

  .section-head p {
    font-size: 16px;
    color: var(--c-text-weak);
    margin: 0;
    line-height: 1.7;
  }

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

  .stat-card {
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow);
  }

  .stat-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--c-primary-light);
  }

  .stat-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    font-size: 22px;
    color: #fff;
    background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  }

  .stat-card:nth-child(2) .stat-icon {
    background: linear-gradient(135deg, #0EA5E9, #38BDF8);
  }

  .stat-card:nth-child(3) .stat-icon {
    background: linear-gradient(135deg, #F59E0B, #FBBF24);
  }

  .stat-card:nth-child(4) .stat-icon {
    background: linear-gradient(135deg, #10B981, #34D399);
  }

  .stat-number {
    font-size: 36px;
    font-weight: 800;
    color: var(--c-dark);
    line-height: 1.2;
    margin-bottom: 6px;
  }

  .stat-label {
    font-size: 14px;
    color: var(--c-text-weak);
  }

  /* Category Cards */
  .category-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .category-card {
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow);
  }

  .category-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
  }

  .category-card .card-img {
    height: 172px;
    overflow: hidden;
    position: relative;
  }

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

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

  .category-card .card-img::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(15, 23, 42, 0.5));
  }

  .category-card .card-body {
    padding: 24px;
  }

  .category-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--c-dark);
    margin: 0 0 8px;
  }

  .category-card p {
    font-size: 14px;
    color: var(--c-text-weak);
    line-height: 1.6;
    margin-bottom: 16px;
    min-height: 44px;
  }

  .category-card .card-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--c-primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }

  .category-card .card-link i {
    font-size: 12px;
    transition: transform 0.3s;
  }

  .category-card:hover .card-link i {
    transform: translateX(4px);
  }

  /* FAQ Section */
  .faq-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
  }

  .faq-left {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    min-height: 400px;
  }

  .faq-left img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    inset: 0;
  }

  .faq-left .faq-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.82), rgba(79, 70, 229, 0.72));
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 40px;
  }

  .faq-overlay h3 {
    color: #fff;
    font-size: 26px;
    font-weight: 700;
    margin: 0 0 10px;
  }

  .faq-overlay p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 15px;
    line-height: 1.7;
    margin: 0 0 20px;
  }

  .faq-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: #fff;
    border-radius: 30px;
    padding: 6px 16px;
    font-size: 13px;
    width: fit-content;
  }

  .faq-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
  }

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

  .faq-item:hover {
    border-color: var(--c-primary-light);
  }

  .faq-item details {
    padding: 0;
  }

  .faq-item summary {
    padding: 18px 20px;
    font-size: 16px;
    font-weight: 600;
    color: var(--c-dark);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    list-style: none;
    transition: var(--transition);
    line-height: 1.5;
  }

  .faq-item summary::-webkit-details-marker {
    display: none;
  }

  .faq-item summary:after {
    content: "\f107";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: var(--c-text-weak);
    transition: transform 0.3s;
    flex-shrink: 0;
    margin-left: 16px;
    font-size: 15px;
  }

  .faq-item details[open] summary {
    color: var(--c-primary);
  }

  .faq-item details[open] summary:after {
    transform: rotate(180deg);
    color: var(--c-primary);
  }

  .faq-item .faq-answer {
    padding: 0 20px 20px;
    font-size: 15px;
    color: var(--c-text-weak);
    line-height: 1.7;
    border-top: 1px solid var(--c-border);
    padding-top: 16px;
    margin-top: 0;
  }

  /* Process Steps */
  .process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    counter-reset: step;
  }

  .process-card {
    background: var(--c-card);
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    padding: 32px 24px;
    position: relative;
    transition: var(--transition);
    box-shadow: var(--shadow);
  }

  .process-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
  }

  .process-card::before {
    counter-increment: step;
    content: "0" counter(step);
    position: absolute;
    top: 20px;
    right: 24px;
    font-size: 42px;
    font-weight: 800;
    color: var(--c-bg-alt);
    line-height: 1;
    font-style: italic;
    letter-spacing: -2px;
  }

  .process-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    background: var(--c-bg-alt);
    color: var(--c-primary);
    margin-bottom: 20px;
  }

  .process-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--c-dark);
    margin: 0 0 10px;
  }

  .process-card p {
    font-size: 14px;
    color: var(--c-text-weak);
    line-height: 1.65;
    margin: 0;
  }

  /* CTA Section */
  .cta-section {
    background: linear-gradient(135deg, var(--c-dark), #312E81);
    padding: 72px 0;
    position: relative;
    overflow: hidden;
  }

  .cta-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    opacity: 0.15;
  }

  .cta-section .container {
    position: relative;
    z-index: 2;
    text-align: center;
  }

  .cta-section h2 {
    font-size: 34px;
    font-weight: 800;
    color: #fff;
    margin: 0 0 16px;
  }

  .cta-section p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.8);
    max-width: 620px;
    margin: 0 auto 32px;
    line-height: 1.7;
  }

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

  /* Footer */
  .site-footer {
    background: #0F172A;
    color: rgba(255, 255, 255, 0.8);
    padding: 72px 0 32px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 48px;
  }

  .footer-brand h4 {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    margin: 0 0 16px;
  }

  .logo-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
    border-radius: 12px;
    color: #fff;
    font-size: 17px;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.35);
  }

  .footer-brand p {
    font-size: 15px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 24px;
    max-width: 360px;
  }

  .btn-ghost {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: rgba(255, 255, 255, 0.85);
  }

  .btn-ghost:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.5);
  }

  .footer-col h5 {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin: 0 0 20px;
  }

  .footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .footer-col ul li {
    font-size: 14px;
  }

  .footer-col ul a {
    color: rgba(255, 255, 255, 0.6);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
  }

  .footer-col ul a:hover {
    color: #fff;
    padding-left: 4px;
  }

  .footer-col ul li i {
    color: var(--c-accent);
  }

  .footer-copyright {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
  }

  /* Responsive */
  @media (max-width: 1024px) {
    .stats-grid,
    .category-grid,
    .process-grid {
      grid-template-columns: repeat(2, 1fr);
    }

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

  @media (max-width: 768px) {
    .navbar-toggle {
      display: flex;
    }

    .main-nav {
      display: none;
      position: absolute;
      top: 72px;
      left: 0;
      right: 0;
      background: #fff;
      flex-direction: column;
      align-items: stretch;
      padding: 16px;
      box-shadow: var(--shadow-lg);
      border-top: 1px solid var(--c-border);
    }

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

    .nav-link,
    .nav-cta {
      width: 100%;
      justify-content: center;
    }

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

    .page-hero p.hero-desc {
      font-size: 16px;
    }

    .section {
      padding: 64px 0;
    }

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

    .faq-left {
      min-height: 260px;
    }
  }

  @media (max-width: 520px) {
    .stats-grid,
    .category-grid,
    .process-grid {
      grid-template-columns: 1fr;
    }

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

    .page-hero {
      padding: 56px 0 48px;
    }

    .page-hero h1 {
      font-size: 28px;
    }

    .hero-actions {
      flex-direction: column;
    }

    .hero-actions .btn {
      width: 100%;
    }

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

    .footer-copyright {
      flex-direction: column;
      text-align: center;
    }
  }

/* roulang page: category2 */
:root {
            --c-primary: #0f172a;
            --c-primary-light: #1e293b;
            --c-accent: #3b82f6;
            --c-accent2: #8b5cf6;
            --c-bg: #f8fafc;
            --c-card: #ffffff;
            --c-text: #1e293b;
            --c-muted: #64748b;
            --c-border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.06);
            --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.14);
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--c-bg);
            color: var(--c-text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }
        /* header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--c-border);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--c-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--c-accent), var(--c-accent2));
            color: #fff;
            font-size: 16px;
            box-shadow: 0 4px 14px rgba(59, 130, 246, 0.35);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 26px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 500;
            color: var(--c-text);
            padding: 8px 2px;
            border-bottom: 2px solid transparent;
            transition: color .2s ease, border-color .2s ease;
        }
        .nav-link i {
            color: var(--c-muted);
            transition: color .2s ease;
        }
        .nav-link:hover {
            color: var(--c-accent);
        }
        .nav-link:hover i {
            color: var(--c-accent);
        }
        .nav-link.active {
            color: var(--c-accent);
            border-bottom-color: var(--c-accent);
            font-weight: 600;
        }
        .nav-link.active i {
            color: var(--c-accent);
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--c-accent), var(--c-accent2));
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
            transition: transform .2s ease, box-shadow .2s ease;
            white-space: nowrap;
        }
        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
        }
        .mobile-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border: 1px solid var(--c-border);
            border-radius: 12px;
            background: #fff;
            font-size: 18px;
            color: var(--c-text);
        }
        @media (max-width: 991px) {
            .main-nav {
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                display: none;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 16px 20px 20px;
                background: #fff;
                border-bottom: 1px solid var(--c-border);
                box-shadow: var(--shadow-lg);
            }
            .main-nav.open {
                display: flex;
            }
            .nav-link {
                padding: 12px 12px;
                border-radius: 10px;
                border-bottom: none;
            }
            .nav-link.active {
                background: rgba(59, 130, 246, 0.1);
            }
            .nav-cta {
                justify-content: center;
                margin-top: 8px;
            }
            .mobile-toggle {
                display: inline-flex;
            }
        }
        /* banner */
        .page-banner {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: 110px 0 120px;
            color: #fff;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(2, 6, 23, 0.92) 0%, rgba(15, 23, 42, 0.72) 50%, rgba(59, 130, 246, 0.45) 100%);
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            transition: color .2s;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb i {
            font-size: 10px;
            color: rgba(255, 255, 255, 0.5);
        }
        .page-banner h1 {
            font-size: 44px;
            line-height: 1.2;
            font-weight: 800;
            margin: 0 0 18px;
            letter-spacing: 1px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .banner-desc {
            max-width: 640px;
            font-size: 18px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.85);
            margin: 0 0 32px;
        }
        .banner-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        /* buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 600;
            transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--c-accent), var(--c-accent2));
            color: #fff;
            box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(59, 130, 246, 0.42);
        }
        .btn-ghost {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.35);
            color: #fff;
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }
        /* section header */
        .section-header {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
        }
        .section-tag {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 999px;
            background: rgba(59, 130, 246, 0.1);
            color: var(--c-accent);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 14px;
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--c-primary);
            line-height: 1.3;
            margin: 0 0 12px;
        }
        .section-header p {
            font-size: 16px;
            color: var(--c-muted);
            margin: 0;
        }
        /* entry cards */
        .entry-card {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
        }
        .entry-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(59, 130, 246, 0.25);
        }
        .entry-card img {
            height: 200px;
            width: 100%;
            object-fit: cover;
        }
        .entry-card-body {
            padding: 24px;
        }
        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .badge-primary {
            background: rgba(59, 130, 246, 0.1);
            color: #2563eb;
        }
        .badge-success {
            background: rgba(16, 185, 129, 0.1);
            color: #059669;
        }
        .badge-warning {
            background: rgba(245, 158, 11, 0.12);
            color: #d97706;
        }
        .entry-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin: 0 0 8px;
            color: var(--c-primary);
        }
        .entry-card p {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.7;
            margin: 0 0 16px;
        }
        .arrow-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--c-accent);
            transition: gap .2s ease;
        }
        .arrow-link:hover {
            gap: 10px;
        }
        /* dark band */
        .dark-band {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: 90px 0;
            color: #fff;
        }
        .dark-band::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(2, 6, 23, 0.94), rgba(15, 23, 42, 0.85));
        }
        .dark-band .container {
            position: relative;
            z-index: 2;
        }
        .dark-band .section-header h2 {
            color: #fff;
        }
        .dark-band .section-header p {
            color: rgba(255, 255, 255, 0.7);
        }
        .dark-band .section-tag {
            background: rgba(59, 130, 246, 0.2);
            color: #93c5fd;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .step-item {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius);
            padding: 28px 22px;
            transition: background .25s ease, transform .25s ease;
        }
        .step-item:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
        }
        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--c-accent), var(--c-accent2));
            color: #fff;
            font-size: 16px;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin: 0 0 8px;
            color: #fff;
        }
        .step-item p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.7);
            margin: 0;
        }
        /* tips */
        .tip-card {
            display: flex;
            gap: 18px;
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius);
            padding: 26px 24px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .25s ease, transform .25s ease;
        }
        .tip-card:hover {
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }
        .tip-icon {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(59, 130, 246, 0.1);
            color: var(--c-accent);
            font-size: 18px;
        }
        .tip-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin: 0 0 6px;
            color: var(--c-primary);
        }
        .tip-card p {
            font-size: 14px;
            color: var(--c-muted);
            line-height: 1.7;
            margin: 0;
        }
        /* notice */
        .notice-band {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: 70px 0;
        }
        .notice-band::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(2, 6, 23, 0.9), rgba(15, 23, 42, 0.8));
        }
        .notice-band .container {
            position: relative;
            z-index: 2;
        }
        .notice-card {
            display: flex;
            align-items: flex-start;
            gap: 22px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.16);
            border-left: 4px solid #f59e0b;
            border-radius: var(--radius);
            padding: 32px;
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
        }
        .notice-card i {
            font-size: 34px;
            color: #f59e0b;
            margin-top: 4px;
            flex-shrink: 0;
        }
        .notice-card h3 {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 10px;
        }
        .notice-card p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.8;
            margin: 0;
        }
        /* faq */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--c-card);
            border: 1px solid var(--c-border);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: box-shadow .25s ease, border-color .25s ease;
        }
        .faq-item.open {
            border-color: rgba(59, 130, 246, 0.35);
            box-shadow: var(--shadow);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 20px 24px;
            background: transparent;
            border: none;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--c-primary);
            transition: color .2s ease;
        }
        .faq-question i {
            font-size: 14px;
            color: var(--c-muted);
            transition: transform .3s ease;
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--c-accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }
        .faq-answer p {
            padding: 16px 24px 20px;
            margin: 0;
            font-size: 15px;
            color: var(--c-muted);
            line-height: 1.8;
            border-top: 1px dashed var(--c-border);
        }
        .faq-item.open .faq-answer {
            max-height: 600px;
        }
        /* cta */
        .cta-box {
            position: relative;
            overflow: hidden;
            background: linear-gradient(135deg, #1e293b, #0f172a);
            border-radius: 24px;
            padding: 56px 48px;
            text-align: center;
            color: #fff;
            box-shadow: var(--shadow-lg);
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.4), transparent 65%);
            border-radius: 50%;
        }
        .cta-box h2 {
            font-size: 30px;
            font-weight: 800;
            margin: 0 0 12px;
            position: relative;
            z-index: 2;
        }
        .cta-box p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 560px;
            margin: 0 auto 30px;
            position: relative;
            z-index: 2;
        }
        .cta-box .btn {
            position: relative;
            z-index: 2;
        }
        /* footer */
        .site-footer {
            background: #0b1120;
            color: rgba(255, 255, 255, 0.6);
            padding: 70px 0 0;
            margin-top: 90px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand h4 {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin: 0 0 14px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.55);
            margin: 0 0 20px;
            max-width: 320px;
        }
        .footer-col h5 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 18px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col li {
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-col a {
            color: rgba(255, 255, 255, 0.55);
            transition: color .2s ease;
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-copyright {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }
        /* responsive */
        @media (max-width: 1023px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .page-banner {
                padding: 80px 0 90px;
            }
            .page-banner h1 {
                font-size: 36px;
            }
            .section-header h2 {
                font-size: 28px;
            }
        }
        @media (max-width: 767px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .page-banner h1 {
                font-size: 30px;
            }
            .banner-desc {
                font-size: 16px;
            }
            .notice-card {
                flex-direction: column;
                padding: 24px;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 24px;
            }
        }
        @media (max-width: 520px) {
            .page-banner {
                padding: 60px 0 70px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .banner-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .entry-card img {
                height: 180px;
            }
            .logo {
                font-size: 17px;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 14px;
            }
        }