/* roulang page: index */
:root {
            --primary: #2f6bff;
            --primary-hover: #1c52e0;
            --primary-light: rgba(47, 107, 255, 0.1);
            --secondary: #00d1a0;
            --dark: #0a1830;
            --dark-2: #122442;
            --text: #1a2340;
            --muted: #66768e;
            --bg: #f4f7fc;
            --bg-white: #ffffff;
            --border: #e4e9f2;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(15, 28, 62, 0.06);
            --shadow: 0 12px 34px rgba(15, 28, 62, 0.09);
            --shadow-lg: 0 24px 60px rgba(15, 28, 62, 0.15);
            --transition: all .28s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "Inter", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text);
            background: var(--bg);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }

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

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

        a:hover {
            color: var(--primary-hover);
        }

        ul,
        ol {
            list-style: none;
        }

        input,
        button {
            font-family: inherit;
            outline: none;
        }

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

        .section {
            padding: 96px 0;
        }

        .section-head {
            text-align: center;
            max-width: 680px;
            margin: 0 auto 56px;
        }

        .section-head.left {
            text-align: left;
            margin-left: 0;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 100px;
            letter-spacing: .4px;
            margin-bottom: 14px;
        }

        .section-tag::before {
            content: "";
            width: 6px;
            height: 6px;
            background: var(--primary);
            border-radius: 50%;
        }

        .section-head h2 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--dark);
            margin-bottom: 14px;
            letter-spacing: -1px;
        }

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

        .btn {
            border-radius: 10px;
            padding: 10px 22px;
            font-weight: 600;
            font-size: 14px;
            letter-spacing: .3px;
            border: 2px solid transparent;
            transition: var(--transition);
        }

        .btn:focus,
        .btn:active:focus {
            box-shadow: 0 0 0 .25rem var(--primary-light);
        }

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

        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(47, 107, 255, 0.28);
        }

        .btn-outline-light {
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
            background: transparent;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            transform: translateY(-2px);
        }

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

        .btn-light:hover {
            background: rgba(255, 255, 255, 0.9);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.15);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.2);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-soft {
            background: var(--primary-light);
            border-color: transparent;
            color: var(--primary);
        }

        .btn-soft:hover {
            background: rgba(47, 107, 255, 0.18);
            color: var(--primary-hover);
            transform: translateY(-2px);
        }

        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
            border-radius: 12px;
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
            border-radius: 9px;
        }

        .badge {
            padding: 6px 14px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 12px;
        }

        /* Navbar */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
            gap: 24px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 800;
            color: var(--dark);
            white-space: nowrap;
            letter-spacing: -0.3px;
        }

        .brand:hover {
            color: var(--primary);
        }

        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 11px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            box-shadow: 0 6px 16px rgba(47, 107, 255, 0.3);
            flex-shrink: 0;
        }

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

        .main-nav .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--text);
            padding: 8px 16px;
            border-radius: 9px;
            transition: var(--transition);
            position: relative;
        }

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

        .main-nav .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-light);
        }

        .header-tools {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            background: #f0f3f9;
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 8px 14px;
            min-width: 220px;
            color: var(--muted);
            transition: var(--transition);
        }

        .search-box:focus-within {
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 4px var(--primary-light);
        }

        .search-box input {
            border: none;
            background: transparent;
            font-size: 13px;
            flex: 1;
            width: 100%;
        }

        .search-box input::placeholder {
            color: #9aa8be;
        }

        .search-kbd {
            background: #e6ebf4;
            border-radius: 6px;
            padding: 2px 8px;
            font-size: 11px;
            font-weight: 600;
            color: #7a8aa0;
            letter-spacing: .5px;
            white-space: nowrap;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            width: 42px;
            height: 42px;
            font-size: 18px;
            color: var(--dark);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .nav-toggle:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .header-cta {
            white-space: nowrap;
        }

        /* Hero */
        .hero {
            position: relative;
            min-height: 660px;
            display: flex;
            align-items: center;
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(5, 14, 32, 0.94) 0%, rgba(5, 14, 32, 0.72) 55%, rgba(5, 14, 32, 0.35) 100%);
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 8px 18px;
            border-radius: 100px;
            backdrop-filter: blur(6px);
            letter-spacing: .4px;
            margin-bottom: 24px;
        }

        .hero-badge i {
            color: var(--secondary);
        }

        .hero-content h1 {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            letter-spacing: -1.5px;
            margin-bottom: 20px;
        }

        .hero-lead {
            font-size: 17px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.82);
            max-width: 560px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 36px;
        }

        .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 22px;
            color: rgba(255, 255, 255, 0.75);
            font-size: 13px;
        }

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

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

        .hero-card {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.22);
            border-radius: var(--radius-lg);
            padding: 28px;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
        }

        .hero-card-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 22px;
        }

        .hero-card-title {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
        }

        .hero-card-live {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            color: var(--secondary);
            background: rgba(0, 209, 160, 0.15);
            border: 1px solid rgba(0, 209, 160, 0.35);
            padding: 4px 12px;
            border-radius: 100px;
        }

        .hero-card-live::before {
            content: "";
            width: 6px;
            height: 6px;
            background: var(--secondary);
            border-radius: 50%;
        }

        .hero-card-field {
            margin-bottom: 16px;
        }

        .hero-card-field label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 7px;
        }

        .hero-card-field input {
            width: 100%;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 10px;
            padding: 12px 14px;
            font-size: 14px;
            color: #fff;
            transition: var(--transition);
        }

        .hero-card-field input::placeholder {
            color: rgba(255, 255, 255, 0.45);
        }

        .hero-card-field input:focus {
            background: rgba(255, 255, 255, 0.2);
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(47, 107, 255, 0.25);
        }

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

        .hero-card-tip {
            margin-top: 14px;
            text-align: center;
            color: rgba(255, 255, 255, 0.55);
            font-size: 13px;
        }

        /* Ticker */
        .news-ticker {
            background: var(--dark);
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .ticker-inner {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .ticker-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--secondary);
            font-size: 14px;
            font-weight: 700;
            white-space: nowrap;
        }

        .ticker-slide {
            color: rgba(255, 255, 255, 0.75);
            font-size: 14px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .ticker-slide span {
            margin-right: 32px;
        }

        /* Features */
        .feature-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px 30px;
            height: 100%;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: var(--transition);
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(47, 107, 255, 0.22);
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-icon {
            width: 54px;
            height: 54px;
            background: var(--primary-light);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            margin-bottom: 20px;
            transition: var(--transition);
        }

        .feature-card:hover .feature-icon {
            background: var(--primary);
            color: #fff;
            transform: scale(1.06);
            box-shadow: 0 8px 20px rgba(47, 107, 255, 0.28);
        }

        .feature-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
        }

        .feature-card p {
            color: var(--muted);
            font-size: 14.5px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* Category cards */
        .category-section {
            background: var(--bg-white);
        }

        .category-card {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 100%;
            transition: var(--transition);
        }

        .category-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
            border-color: rgba(47, 107, 255, 0.2);
        }

        .category-card .cover-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
        }

        .category-card .cover-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

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

        .category-card .cover-mask {
            position: absolute;
            inset: auto 0 0 0;
            height: 70%;
            background: linear-gradient(180deg, transparent, rgba(5, 14, 32, 0.5));
        }

        .category-body {
            padding: 26px 26px 30px;
        }

        .category-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .category-body p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.75;
            margin-bottom: 18px;
        }

        /* Stats */
        .stats-section {
            background: linear-gradient(135deg, var(--dark) 0%, var(--dark-2) 100%);
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .stats-section::before {
            content: "";
            position: absolute;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(47, 107, 255, 0.25), transparent 70%);
            top: -150px;
            right: -80px;
            border-radius: 50%;
        }

        .stat-card {
            text-align: center;
            padding: 32px 20px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }

        .stat-card:hover {
            background: rgba(255, 255, 255, 0.09);
            transform: translateY(-4px);
            border-color: rgba(255, 255, 255, 0.2);
        }

        .stat-num {
            font-size: 44px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -1px;
            margin-bottom: 8px;
            line-height: 1.2;
        }

        .stat-label {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            font-weight: 500;
        }

        /* News */
        .news-section {
            background: var(--bg);
        }

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

        .news-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px 24px;
            transition: var(--transition);
        }

        .news-item:hover {
            box-shadow: var(--shadow);
            border-color: rgba(47, 107, 255, 0.22);
            transform: translateX(4px);
        }

        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 8px;
            flex-wrap: wrap;
        }

        .news-category {
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 12px;
            border-radius: 100px;
        }

        .news-date {
            font-size: 13px;
            color: var(--muted);
        }

        .news-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--dark);
            line-height: 1.6;
            display: block;
            transition: var(--transition);
        }

        .news-title:hover {
            color: var(--primary);
        }

        .empty-state {
            background: var(--bg-white);
            border: 1px dashed var(--border);
            border-radius: var(--radius);
            padding: 48px 30px;
            text-align: center;
            color: var(--muted);
            font-size: 15px;
        }

        .news-side {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }

        .news-side:hover {
            box-shadow: var(--shadow);
        }

        .news-side img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
        }

        .news-side-content {
            padding: 28px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }

        .news-side-content h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
        }

        .news-side-content p {
            color: var(--muted);
            font-size: 14.5px;
            line-height: 1.8;
        }

        /* Process */
        .process-section {
            background: var(--bg-white);
        }

        .process-item {
            text-align: center;
            padding: 36px 24px;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            background: var(--bg);
            height: 100%;
            position: relative;
            transition: var(--transition);
        }

        .process-item:hover {
            box-shadow: var(--shadow);
            transform: translateY(-5px);
        }

        .process-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 17px;
            font-weight: 800;
            margin-bottom: 20px;
            box-shadow: 0 8px 20px rgba(47, 107, 255, 0.25);
        }

        .process-item:nth-child(2) .process-num {
            background: #5b8cff;
        }

        .process-item:nth-child(3) .process-num {
            background: #00b4ff;
        }

        .process-item:nth-child(4) .process-num {
            background: var(--secondary);
        }

        .process-item h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
        }

        .process-item p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* FAQ */
        .faq-section {
            background: var(--bg);
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }

        .accordion-item {
            background: var(--bg-white);
            border: 1px solid var(--border) !important;
            border-radius: var(--radius) !important;
            margin-bottom: 14px;
            overflow: hidden;
        }

        .accordion-button {
            background: var(--bg-white) !important;
            color: var(--dark) !important;
            font-weight: 600;
            font-size: 15px;
            padding: 20px 24px;
            box-shadow: none !important;
        }

        .accordion-button:not(.collapsed) {
            color: var(--primary) !important;
        }

        .accordion-button:focus {
            box-shadow: none;
            border-color: transparent;
        }

        .accordion-button::after {
            background-size: 14px;
            opacity: .6;
        }

        .accordion-body {
            color: var(--muted);
            font-size: 14.5px;
            line-height: 1.8;
            padding: 0 24px 22px;
        }

        /* CTA */
        .cta-section {
            padding: 96px 0;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .cta-card {
            background: linear-gradient(135deg, var(--primary), #1c52e0);
            border-radius: var(--radius-lg);
            padding: 60px 50px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .cta-card::before {
            content: "";
            position: absolute;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.2), transparent 70%);
            top: -100px;
            right: -50px;
            border-radius: 50%;
        }

        .cta-card::after {
            content: "";
            position: absolute;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(0, 209, 160, 0.25), transparent 70%);
            bottom: -80px;
            left: -40px;
            border-radius: 50%;
        }

        .cta-card h2 {
            color: #fff;
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -1px;
            position: relative;
            z-index: 2;
        }

        .cta-card p {
            color: rgba(255, 255, 255, 0.9);
            font-size: 16px;
            margin-bottom: 30px;
            position: relative;
            z-index: 2;
        }

        .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }

        /* Footer */
        .site-footer {
            background: var(--dark);
            padding: 76px 0 0;
            color: rgba(255, 255, 255, 0.75);
        }

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

        .footer-brand .brand-icon {
            width: 36px;
            height: 36px;
            font-size: 15px;
        }

        .footer-about {
            font-size: 14px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.6);
            max-width: 340px;
            margin-bottom: 20px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 9px;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.75);
            font-size: 14px;
            transition: var(--transition);
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 20px;
        }

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

        .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-links a i {
            font-size: 11px;
            color: var(--secondary);
        }

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

        .footer-contact {
            margin-top: 4px;
        }

        .footer-contact p {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            margin-bottom: 12px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-contact p i {
            color: var(--secondary);
            margin-top: 4px;
        }

        .footer-bottom {
            margin-top: 56px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 22px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 0;
        }

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

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

        /* Responsive */
        @media (max-width: 992px) {
            .header-tools .search-box {
                display: none;
            }

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

            .main-nav {
                position: fixed;
                top: 75px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                align-items: stretch;
                padding: 16px;
                gap: 8px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow);
                transform: translateY(-16px);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                z-index: 999;
            }

            body.nav-open .main-nav {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .main-nav .nav-link {
                padding: 12px 16px;
                border-radius: 10px;
            }

            .hero-content h1 {
                font-size: 38px;
            }

            .section {
                padding: 72px 0;
            }

            .section-head h2 {
                font-size: 30px;
            }

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

        @media (max-width: 768px) {
            .header-inner {
                height: 66px;
            }

            .brand {
                font-size: 16px;
            }

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

            .header-cta {
                display: none;
            }

            .hero {
                min-height: auto;
                padding: 72px 0;
            }

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

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

            .hero-actions .btn {
                font-size: 14px;
                padding: 12px 20px;
            }

            .hero-meta {
                gap: 14px;
                flex-direction: column;
                align-items: flex-start;
            }

            .section {
                padding: 56px 0;
            }

            .section-head {
                margin-bottom: 36px;
            }

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

            .stat-num {
                font-size: 30px;
            }

            .news-side {
                margin-top: 20px;
            }

            .cta-card h2 {
                font-size: 26px;
            }

            .cta-actions .btn {
                width: 100%;
                justify-content: center;
            }

            .news-ticker .ticker-slide {
                white-space: normal;
                overflow: visible;
                text-overflow: unset;
            }

            .ticker-inner {
                align-items: flex-start;
                flex-direction: column;
                gap: 6px;
            }
        }

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

            .brand {
                font-size: 15px;
            }

            .hero-content h1 {
                font-size: 26px;
            }

            .hero-lead {
                font-size: 14px;
            }

            .hero-badge {
                font-size: 12px;
                padding: 6px 14px;
            }

            .hero-card {
                padding: 22px;
            }

            .feature-card {
                padding: 28px 22px;
            }

            .process-item {
                padding: 28px 18px;
            }

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

            .cta-card h2 {
                font-size: 22px;
            }

            .footer-bottom p {
                font-size: 12px;
                line-height: 1.8;
            }

            .section-tag {
                font-size: 12px;
                padding: 5px 12px;
            }
        }

/* roulang page: category1 */
:root {
    --primary: #14364f;
    --primary-light: #1e587d;
    --primary-lighter: #2d78a8;
    --accent: #e8a33d;
    --accent-dark: #c57f1d;
    --bg-body: #f4f7fb;
    --bg-white: #ffffff;
    --text-dark: #1c2b36;
    --text-muted: #65758a;
    --border: #e3e9f0;
    --radius: 18px;
    --radius-sm: 10px;
    --shadow: 0 8px 24px rgba(20, 54, 79, .08);
    --shadow-lg: 0 18px 44px rgba(20, 54, 79, .12);
    --transition: all .25s ease;
    --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", -apple-system, BlinkMacSystemFont, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font-sans);
    background: var(--bg-body);
    color: var(--text-dark);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; Height: auto; }
a { text-decoration: none; color: inherit; transition: var(--transition); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding-left: 20px; padding-right: 20px; }
.section { padding: 90px 0; position: relative; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(232, 163, 61, .12); color: var(--accent-dark);
    font-size: 13px; font-weight: 700; letter-spacing: .06em;
    padding: 6px 16px; border-radius: 40px; margin-bottom: 16px;
}
.section-head h2 { font-size: 34px; font-weight: 800; line-height: 1.3; color: var(--primary); margin-bottom: 14px; }
.section-head p { color: var(--text-muted); font-size: 16px; }

/* ===== Button ===== */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-weight: 600; border-radius: 10px; padding: 12px 28px; transition: var(--transition); font-size: 15px; border: 2px solid transparent; }
.btn-primary { background: var(--primary); color: #fff !important; box-shadow: 0 4px 14px rgba(20, 54, 79, .25); }
.btn-primary:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(20, 54, 79, .3); }
.btn-accent { background: var(--accent); color: var(--primary-dark, #0c1e2b) !important; box-shadow: 0 4px 14px rgba(232, 163, 61, .35); }
.btn-accent:hover { background: var(--accent-dark); color: #fff !important; transform: translateY(-2px); }
.btn-outline { border-color: rgba(255,255,255,.45); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,.15); border-color: #fff; }
.btn-sm { padding: 8px 18px; font-size: 14px; border-radius: 8px; }

/* ===== Header / Nav ===== */
.site-header {
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 1000;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 22px; color: var(--primary); white-space: nowrap; }
.brand-icon {
    width: 42px; height: 42px; border-radius: 12px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-lighter) 100%);
    color: #fff; display: flex; align-items: center; justify-content: center; font-size: 18px;
    box-shadow: 0 4px 12px rgba(20, 54, 79, .2);
}
.main-nav { display: flex; gap: 6px; }
.main-nav .nav-link {
    padding: 9px 18px; border-radius: 10px; font-size: 15px; font-weight: 600; color: var(--text-muted);
    position: relative; transition: var(--transition);
}
.main-nav .nav-link:hover { color: var(--primary); background: rgba(20, 54, 79, .06); }
.main-nav .nav-link.active { color: var(--primary); background: rgba(20, 54, 79, .08); }
.main-nav .nav-link.active::after {
    content: ""; position: absolute; left: 18px; right: 18px; bottom: 4px; height: 3px; border-radius: 3px;
    background: var(--accent);
}
.header-tools { display: flex; align-items: center; gap: 14px; }
.search-box {
    display: flex; align-items: center; gap: 8px;
    background: var(--bg-body); border: 1px solid var(--border);
    border-radius: 10px; padding: 8px 12px; min-width: 220px;
}
.search-box i { color: var(--text-muted); font-size: 14px; }
.search-box input { border: none; outline: none; background: transparent; width: 100%; font-size: 14px; color: var(--text-dark); }
.search-box .search-kbd {
    font-size: 11px; color: var(--text-muted); background: #e9edf2; border-radius: 4px;
    padding: 2px 6px; border: 1px solid var(--border); white-space: nowrap;
}
.nav-toggle { display: none; width: 42px; height: 42px; border-radius: 10px; background: var(--bg-body); border: 1px solid var(--border); align-items: center; justify-content: center; font-size: 18px; color: var(--primary); }

/* ===== Page Hero ===== */
.page-hero {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    padding: 90px 0 100px;
    color: #fff;
}
.page-hero::before {
    content: "";
    position: absolute; inset: 0;
    background: linear-gradient(115deg, rgba(14,33,51,.92) 0%, rgba(20,54,79,.78) 45%, rgba(30,80,110,.55) 100%);
}
.page-hero > .container { position: relative; z-index: 2; }
.page-hero .breadcrumb-hero { display: flex; gap: 8px; align-items: center; font-size: 14px; color: rgba(255,255,255,.82); margin-bottom: 18px; }
.page-hero .breadcrumb-hero a { color: rgba(255,255,255,.82); }
.page-hero .breadcrumb-hero a:hover { color: var(--accent); }
.page-hero .breadcrumb-hero i { font-size: 12px; }
.page-hero h1 { font-size: 44px; font-weight: 800; line-height: 1.25; margin-bottom: 16px; letter-spacing: .02em; }
.page-hero h1 .highlight { color: var(--accent); }
.page-hero .hero-desc { font-size: 17px; max-width: 640px; color: rgba(255,255,255,.9); margin-bottom: 32px; line-height: 1.8; }
.page-hero .hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.page-hero .hero-stats {
    display: flex; gap: 40px; margin-top: 48px; padding-top: 32px;
    border-top: 1px solid rgba(255,255,255,.18);
}
.page-hero .hero-stats .stat-item .num { font-size: 30px; font-weight: 800; color: var(--accent); }
.page-hero .hero-stats .stat-item .label { font-size: 14px; color: rgba(255,255,255,.75); margin-top: 2px; }

/* ===== Login Methods ===== */
.login-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: 36px 28px;
    height: 100%;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.login-card::before {
    content: "";
    position: absolute; top: 0; left: 0; right: 0; height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0; transition: var(--transition);
}
.login-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.login-card:hover::before { opacity: 1; }
.login-card .card-icon {
    width: 56px; height: 56px; border-radius: 16px;
    background: linear-gradient(135deg, var(--primary), var(--primary-lighter));
    color: #fff; font-size: 22px;
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 20px;
}
.login-card .card-tag {
    position: absolute; top: 20px; right: 20px;
    font-size: 12px; font-weight: 700;
    background: rgba(232, 163, 61, .12); color: var(--accent-dark);
    padding: 4px 12px; border-radius: 20px;
}
.login-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; color: var(--primary); }
.login-card p { color: var(--text-muted); font-size: 14px; line-height: 1.7; margin-bottom: 16px; }
.login-card .tip { font-size: 13px; color: var(--text-muted); background: var(--bg-body); border-radius: 8px; padding: 8px 12px; }

/* ===== Steps ===== */
.steps-wrap { counter-reset: step; }
.step-item { position: relative; padding: 32px 28px; background: var(--bg-white); border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow); height: 100%; transition: var(--transition); }
.step-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.step-item .step-num {
    width: 40px; height: 40px; border-radius: 50%;
    background: var(--primary); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 17px; margin-bottom: 18px;
    box-shadow: 0 4px 12px rgba(20, 54, 79, .25);
}
.step-item .step-icon { font-size: 16px; margin-bottom: 12px; color: var(--accent); }
.step-item h3 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.step-item p { font-size: 14px; color: var(--text-muted); line-height: 1.7; margin: 0; }
.step-arrow { position: absolute; top: 50%; right: -20px; transform: translateY(-50%); color: var(--accent); font-size: 20px; z-index: 2; }

/* ===== Article Cards ===== */
.article-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: var(--transition);
    height: 100%;
    display: flex; flex-direction: column;
}
.article-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.article-card .card-img { position: relative; overflow: hidden; aspect-ratio: 16/9; }
.article-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.article-card:hover .card-img img { transform: scale(1.05); }
.article-card .card-img .card-tag {
    position: absolute; top: 14px; left: 14px;
    background: rgba(20,54,79,.88); color: #fff;
    font-size: 12px; font-weight: 600; padding: 5px 14px; border-radius: 6px;
    backdrop-filter: blur(6px);
}
.article-card .card-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.article-card .card-body .card-meta { display: flex; gap: 14px; font-size: 13px; color: var(--text-muted); margin-bottom: 10px; align-items: center; }
.article-card .card-body h3 { font-size: 18px; font-weight: 700; line-height: 1.45; color: var(--primary); margin-bottom: 10px; }
.article-card .card-body h3 a:hover { color: var(--primary-light); }
.article-card .card-body p { font-size: 14px; color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; flex: 1; }
.article-card .card-body .card-btn { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 600; color: var(--primary); }
.article-card .card-body .card-btn i { transition: transform .25s; }
.article-card .card-body .card-btn:hover i { transform: translateX(4px); }

/* ===== Tips Feature Section ===== */
.tips-zone {
    background: var(--primary);
    color: #fff;
    position: relative;
    overflow: hidden;
}
.tips-zone::before {
    content: ""; position: absolute; top: -110px; right: -110px;
    width: 300px; height: 300px; border-radius: 50%;
    background: rgba(232,163,61,.15);
}
.tips-zone::after {
    content: ""; position: absolute; bottom: -60px; left: -60px;
    width: 160px; height: 160px; border-radius: 50%;
    background: rgba(255,255,255,.06);
}
.tips-zone .row { position: relative; z-index: 2; align-items: center; }
.tips-img { border-radius: var(--radius); overflow: hidden; box-shadow: 0 20px 50px rgba(0,0,0,.35); }
.tips-img img { width: 100%; height: 100%; object-fit: cover; }
.tips-list { list-style: none; padding: 0; margin: 24px 0 32px; }
.tips-list li { display: flex; gap: 14px; padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.12); font-size: 15px; line-height: 1.7; }
.tips-list li:last-child { border-bottom: none; }
.tips-list li i { color: var(--accent); margin-top: 4px; font-size: 15px; }

/* ===== FAQ ===== */
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-item {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 14px;
    margin-bottom: 14px;
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: var(--transition);
}
.faq-item:hover { border-color: rgba(20,54,79,.25); }
.faq-item .faq-q {
    display: flex; align-items: center; gap: 14px;
    padding: 22px 26px;
    font-size: 16px; font-weight: 700; color: var(--primary);
    cursor: pointer; background: none;
    width: 100%; text-align: left;
    position: relative;
}
.faq-item .faq-q .faq-icon {
    width: 30px; height: 30px; border-radius: 50%;
    background: rgba(20,54,79,.08);
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 14px; color: var(--primary);
    flex-shrink: 0;
    transition: var(--transition);
}
.faq-item .faq-q .chevron {
    margin-left: auto; color: var(--text-muted);
    transition: transform .3s ease;
}
.faq-item.open .faq-q .chevron { transform: rotate(180deg); color: var(--accent); }
.faq-item .faq-a {
    max-height: 0; overflow: hidden;
    transition: max-height .35s ease;
    padding: 0 26px 0 70px;
    font-size: 15px; color: var(--text-muted);
    line-height: 1.8;
}
.faq-item.open .faq-a { max-height: 320px; padding-bottom: 22px; }

/* ===== CTA ===== */
.cta-zone {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    padding: 90px 0;
    text-align: center;
    color: #fff;
}
.cta-zone::before {
    content: "";
    position: absolute; inset: 0;
    background: linear-gradient(120deg, rgba(14,33,51,.94), rgba(20,54,79,.82));
}
.cta-zone > .container { position: relative; z-index: 2; }
.cta-zone h2 { font-size: 36px; font-weight: 800; margin-bottom: 16px; }
.cta-zone p { font-size: 17px; color: rgba(255,255,255,.85); max-width: 560px; margin: 0 auto 32px; }

/* ===== Footer ===== */
.site-footer { background: #0e1c2a; color: rgba(255,255,255,.78); padding: 70px 0 0; }
.site-footer .footer-brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; color: #fff; margin-bottom: 16px; }
.site-footer .footer-brand .brand-icon { background: var(--accent); color: var(--primary); }
.site-footer .footer-about { font-size: 14px; line-height: 1.8; color: rgba(255,255,255,.6); margin-bottom: 22px; max-width: 360px; }
.site-footer .footer-social { display: flex; gap: 10px; }
.site-footer .footer-social a {
    width: 38px; height: 38px; border-radius: 10px;
    background: rgba(255,255,255,.08); color: rgba(255,255,255,.8);
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 16px; transition: var(--transition);
}
.site-footer .footer-social a:hover { background: var(--accent); color: var(--primary); transform: translateY(-3px); }
.site-footer .footer-title { font-size: 16px; color: #fff; margin-bottom: 20px; font-weight: 700; }
.site-footer .footer-links { list-style: none; padding: 0; margin: 0; }
.site-footer .footer-links li { margin-bottom: 10px; }
.site-footer .footer-links a { color: rgba(255,255,255,.6); font-size: 14px; display: inline-flex; align-items: center; gap: 6px; }
.site-footer .footer-links a i { font-size: 11px; color: var(--accent); }
.site-footer .footer-links a:hover { color: #fff; padding-left: 4px; }
.site-footer .footer-contact p { display: flex; align-items: center; gap: 10px; font-size: 14px; color: rgba(255,255,255,.6); margin-bottom: 14px; }
.site-footer .footer-contact p i { color: var(--accent); width: 16px; text-align: center; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.1);
    padding: 24px 0 20px;
    margin-top: 50px;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,.4);
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: none; }
}
.animate-up { animation: fadeInUp .7s ease both; }
.delay-1 { animation-delay: .1s; }
.delay-2 { animation-delay: .2s; }
.delay-3 { animation-delay: .3s; }

/* ===== Responsive ===== */
@media (max-width: 1199.98px) {
    .search-box { min-width: 160px; }
    .section { padding: 70px 0; }
}
@media (max-width: 991.98px) {
    .header-inner { flex-wrap: wrap; height: auto; padding: 14px 0; }
    .main-nav {
        position: fixed; top: 76px; left: 0; right: 0; z-index: 999;
        background: #fff; flex-direction: column; padding: 16px 20px;
        box-shadow: 0 20px 40px rgba(0,0,0,.08);
        border-bottom: 1px solid var(--border);
        transform: translateY(-16px); opacity: 0; pointer-events: none;
        transition: var(--transition);
    }
    body.nav-open .main-nav { transform: translateY(0); opacity: 1; pointer-events: auto; }
    .main-nav .nav-link { padding: 12px 16px; }
    .nav-toggle { display: inline-flex; margin-left: auto; }
    .search-box { display: none; }
    .header-cta { display: none; }
    .header-tools { gap: 8px; }
    .section-head h2 { font-size: 28px; }
    .page-hero h1 { font-size: 34px; }
    .step-arrow { display: none; }
}
@media (max-width: 767.98px) {
    .section { padding: 56px 0; }
    .page-hero { padding: 60px 0 70px; }
    .page-hero h1 { font-size: 28px; }
    .hero-stats { flex-wrap: wrap; gap: 20px; }
    .cta-zone h2 { font-size: 26px; }
}
@media (max-width: 575.98px) {
    .container { padding-left: 16px; padding-right: 16px; }
    .section-head h2 { font-size: 24px; }
    .section-head p { font-size: 14px; }
    .faq-item .faq-q { padding: 18px 16px; font-size: 14px; }
    .faq-item .faq-q .chevron { margin-left: 6px; }
    .page-hero .hero-actions .btn { width: 100%; padding: 12px 16px; }
}

/* roulang page: article */
:root {
  --primary: #1e3a8a;
  --primary-light: #3b82f6;
  --primary-dark: #172554;
  --accent: #f59e0b;
  --accent-light: #fbbf24;
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
  --shadow-hover: 0 12px 40px rgba(15, 23, 42, 0.12);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button,
input {
  font-family: inherit;
}
.container {
  max-width: 1280px;
  padding-left: 24px;
  padding-right: 24px;
}
.section {
  padding: 90px 0;
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--primary-dark);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.brand:hover {
  color: var(--primary);
}
.brand-icon {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  border-radius: 10px;
  font-size: 1rem;
  box-shadow: 0 4px 12px rgba(30, 58, 138, 0.25);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  padding: 8px 16px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: 8px;
  position: relative;
}
.nav-link:hover {
  color: var(--primary);
  background: rgba(30, 58, 138, 0.05);
}
.nav-link.active {
  color: var(--primary);
  background: rgba(30, 58, 138, 0.08);
}
.header-tools {
  display: flex;
  align-items: center;
  gap: 14px;
}
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 14px;
  min-width: 220px;
  color: var(--text-muted);
  transition: var(--transition);
}
.search-box:focus-within {
  border-color: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12);
}
.search-box input {
  border: none;
  outline: none;
  background: transparent;
  font-size: 0.88rem;
  color: var(--text);
  flex: 1;
  min-width: 0;
}
.search-box input::placeholder {
  color: var(--text-muted);
}
.search-kbd {
  font-size: 0.72rem;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 8px;
  color: var(--text-muted);
  white-space: nowrap;
}
.btn {
  border-radius: 10px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border: none;
  box-shadow: 0 4px 14px rgba(30, 58, 138, 0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(30, 58, 138, 0.3);
}
.btn-sm {
  padding: 8px 18px;
  font-size: 0.88rem;
}
.btn-outline-light {
  border: 1.5px solid rgba(255, 255, 255, 0.7);
  color: #fff;
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: #fff;
}
.header-cta {
  white-space: nowrap;
}
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--text);
  cursor: pointer;
}

/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  padding: 90px 0 70px;
  background-size: cover;
  background-position: center;
  color: #fff;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(30, 58, 138, 0.75));
}
.page-hero .container {
  position: relative;
  z-index: 2;
}
.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  margin-bottom: 24px;
  color: rgba(255, 255, 255, 0.7);
}
.breadcrumb-nav a {
  color: rgba(255, 255, 255, 0.7);
}
.breadcrumb-nav a:hover {
  color: var(--accent-light);
}
.breadcrumb-nav .sep {
  color: rgba(255, 255, 255, 0.4);
}
.page-hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.3;
  max-width: 820px;
  margin-bottom: 20px;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.2);
}
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  font-size: 0.92rem;
  color: rgba(255, 255, 255, 0.85);
}
.hero-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.badge-cat {
  background: var(--accent);
  color: #1e293b;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: 999px;
  display: inline-block;
}

/* ===== Article Main ===== */
.article-main {
  padding: 70px 0 90px;
}
.article-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow);
}
.article-body {
  font-size: 1.05rem;
  line-height: 1.9;
  color: #1e293b;
}
.article-body p {
  margin-bottom: 1.5em;
}
.article-body h2 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--text);
  margin: 2em 0 1em;
  padding-left: 16px;
  border-left: 4px solid var(--primary-light);
  border-radius: 2px;
}
.article-body h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
  margin: 1.8em 0 0.8em;
}
.article-body ul,
.article-body ol {
  margin-bottom: 1.5em;
  padding-left: 1.5em;
}
.article-body li {
  margin-bottom: 0.6em;
}
.article-body a {
  color: var(--primary-light);
  border-bottom: 1px solid rgba(59, 130, 246, 0.3);
}
.article-body a:hover {
  color: var(--primary);
  border-bottom-color: var(--primary);
}
.article-body img {
  border-radius: var(--radius);
  margin: 2em 0;
}
.article-body blockquote {
  background: #f1f5f9;
  border-left: 4px solid var(--primary-light);
  padding: 18px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.5em 0;
  color: var(--text-secondary);
  font-style: italic;
}
.article-body strong {
  color: var(--text);
  font-weight: 700;
}
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--border);
}
.tag-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 5px 14px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
}
.tag-link:hover {
  background: rgba(30, 58, 138, 0.06);
  border-color: var(--primary-light);
  color: var(--primary);
}
.not-found-card {
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 80px 40px;
  text-align: center;
  box-shadow: var(--shadow);
}
.not-found-card .nf-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f1f5f9;
  border-radius: 50%;
  font-size: 1.8rem;
  color: var(--text-muted);
}
.not-found-card h2 {
  font-size: 1.6rem;
  font-weight: 800;
  margin-bottom: 12px;
}
.not-found-card p {
  color: var(--text-secondary);
  margin-bottom: 28px;
}

/* ===== Sidebar ===== */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.sidebar-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}
.sidebar-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 20px;
}
.sidebar-title i {
  color: var(--primary-light);
}
.help-card {
  background: linear-gradient(135deg, #eff6ff, #f8fafc);
  border: 1px solid #dbeafe;
  border-radius: var(--radius);
  padding: 24px;
}
.help-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 16px;
}
.security-tips {
  list-style: none;
  padding: 0;
  margin: 0;
}
.security-tips li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.security-tips li:last-child {
  border-bottom: none;
}
.security-tips li i {
  color: var(--accent);
  font-size: 0.85rem;
  margin-top: 4px;
}
.quick-help a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition);
}
.quick-help a:hover {
  background: rgba(30, 58, 138, 0.05);
  color: var(--primary);
}
.quick-help a i {
  width: 18px;
  text-align: center;
  color: var(--primary-light);
}

/* ===== Info Strip ===== */
.info-strip {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  padding: 20px 0;
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.92rem;
}
.info-strip .container {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  text-align: center;
}
.info-strip i {
  color: var(--accent-light);
  font-size: 1.2rem;
}
.info-strip b {
  color: #fff;
}

/* ===== Related Section ===== */
.related-section {
  padding: 90px 0;
  background: var(--surface);
}
.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 52px;
}
.section-head .eyebrow {
  display: inline-block;
  background: rgba(30, 58, 138, 0.08);
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 5px 16px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.section-head p {
  color: var(--text-secondary);
  font-size: 1rem;
}
.rel-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  height: 100%;
  transition: var(--transition);
  display: block;
}
.rel-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(59, 130, 246, 0.3);
}
.rel-card .rel-img {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
}
.rel-card .rel-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.rel-card:hover .rel-img img {
  transform: scale(1.05);
}
.rel-card .rel-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15, 23, 42, 0.25), transparent);
}
.rel-content {
  padding: 24px;
}
.rel-content .rel-cat {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--primary-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
  display: block;
}
.rel-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.4;
}
.rel-content p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-bottom: 16px;
}
.rel-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--primary);
}
.rel-link i {
  transition: transform 0.2s;
}
.rel-card:hover .rel-link i {
  transform: translateX(4px);
}

/* ===== FAQ Section ===== */
.faq-section {
  padding: 90px 0;
  background: var(--bg);
}
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  overflow: hidden;
}
.faq-item:hover {
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: var(--shadow-hover);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 28px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  cursor: pointer;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
}
.faq-question i {
  color: var(--primary-light);
  font-size: 0.95rem;
  transition: transform 0.3s;
}
.faq-item.open .faq-question i {
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 28px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 28px 24px;
}
.faq-notice {
  text-align: center;
  margin-top: 36px;
  color: var(--text-muted);
  font-size: 0.9rem;
}
.faq-notice a {
  color: var(--primary-light);
  font-weight: 600;
}

/* ===== CTA Section ===== */
.cta-section {
  position: relative;
  padding: 90px 0;
  background-size: cover;
  background-position: center;
  color: #fff;
  text-align: center;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(30, 58, 138, 0.85));
}
.cta-section .container {
  position: relative;
  z-index: 2;
}
.cta-section h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 16px;
}
.cta-section p {
  max-width: 640px;
  margin: 0 auto 36px;
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.8);
}
.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.cta-buttons .btn {
  padding: 14px 32px;
  font-size: 1rem;
  border-radius: 12px;
}
.btn-cta-light {
  background: #fff;
  color: var(--primary-dark);
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(255, 255, 255, 0.25);
}
.btn-cta-light:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 255, 255, 0.35);
}

/* ===== Footer ===== */
.site-footer {
  background: #0f172a;
  color: rgba(255, 255, 255, 0.7);
  padding: 70px 0 0;
}
.site-footer .container {
  max-width: 1280px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.15rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}
.footer-brand .brand-icon {
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
}
.footer-about {
  font-size: 0.92rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 20px;
}
.footer-social {
  display: flex;
  gap: 12px;
}
.footer-social a {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 1rem;
  transition: var(--transition);
}
.footer-social a:hover {
  background: var(--primary-light);
  color: #fff;
  transform: translateY(-3px);
}
.footer-title {
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 0.03em;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.9rem;
  transition: var(--transition);
}
.footer-links a i {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.3);
}
.footer-links a:hover {
  color: var(--accent-light);
  padding-left: 4px;
}
.footer-contact p {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.9rem;
  margin-bottom: 12px;
}
.footer-contact i {
  width: 20px;
  text-align: center;
  color: var(--primary-light);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: 60px;
  padding: 22px 0;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
  .section {
    padding: 70px 0;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .main-nav {
    position: fixed;
    top: 72px;
    right: -300px;
    width: 280px;
    height: calc(100vh - 72px);
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 24px;
    gap: 8px;
    box-shadow: -8px 0 30px rgba(15, 23, 42, 0.1);
    transition: right 0.3s ease;
    z-index: 999;
  }
  .nav-open .main-nav {
    right: 0;
  }
  .nav-link {
    padding: 12px 16px;
    font-size: 1rem;
  }
  .search-box {
    min-width: 160px;
  }
  .article-card {
    padding: 32px;
  }
  .page-hero {
    padding: 70px 0 50px;
  }
}

@media (max-width: 768px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .header-inner {
    gap: 12px;
  }
  .search-box {
    display: none;
  }
  .header-cta {
    display: none;
  }
  .brand {
    font-size: 1rem;
  }
  .brand-icon {
    width: 34px;
    height: 34px;
  }
  .page-hero {
    padding: 60px 0 44px;
  }
  .hero-meta {
    gap: 12px;
    font-size: 0.85rem;
  }
  .article-main {
    padding: 50px 0 70px;
  }
  .article-card {
    padding: 24px 20px;
  }
  .article-body {
    font-size: 1rem;
  }
  .section-head {
    margin-bottom: 36px;
  }
  .related-section,
  .faq-section,
  .cta-section {
    padding: 60px 0;
  }
  .faq-question {
    padding: 16px 20px;
  }
  .faq-answer {
    padding: 0 20px;
  }
  .faq-item.open .faq-answer {
    padding: 0 20px 20px;
  }
  .site-footer {
    padding-top: 50px;
  }
  .footer-bottom {
    margin-top: 40px;
  }
}

@media (max-width: 520px) {
  .brand {
    font-size: 0.92rem;
  }
  .brand-icon {
    width: 30px;
    height: 30px;
    font-size: 0.85rem;
  }
  .main-nav {
    width: 240px;
    right: -260px;
  }
  .page-hero h1 {
    font-size: 1.4rem;
  }
  .badge-cat {
    font-size: 0.72rem;
  }
  .article-tags {
    gap: 8px;
  }
  .tag-link {
    font-size: 0.75rem;
    padding: 4px 10px;
  }
  .not-found-card {
    padding: 50px 24px;
  }
  .cta-buttons .btn {
    padding: 12px 24px;
    font-size: 0.92rem;
  }
  .footer-brand {
    font-size: 1rem;
  }
}

/* roulang page: category2 */
:root {
            --c-primary: #0f2f5f;
            --c-primary-light: #1f5eff;
            --c-primary-lighter: #eaf0ff;
            --c-accent: #f5a623;
            --c-accent-light: #fff4e0;
            --c-bg: #f5f7fb;
            --c-white: #ffffff;
            --c-text: #16213a;
            --c-muted: #64748b;
            --c-border: #e3e8f0;
            --c-success: #16a34a;
            --c-danger: #dc2626;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 10px rgba(15, 47, 95, .06);
            --shadow-md: 0 8px 30px rgba(15, 47, 95, .1);
            --shadow-lg: 0 16px 50px rgba(15, 47, 95, .14);
            --transition: .25s ease;
            --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--c-text);
            background: var(--c-bg);
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }

        a:hover {
            color: var(--c-primary-light);
        }

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

        button,
        input {
            font-family: inherit;
            outline: none;
        }

        .container {
            max-width: 1240px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: 96px 0;
        }

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

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

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

        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--c-primary-lighter);
            color: var(--c-primary);
            font-size: 14px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 16px;
            letter-spacing: .5px;
        }

        .section-head .eyebrow i {
            color: var(--c-primary-light);
        }

        .section-head h2 {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            margin: 0 0 16px;
            color: var(--c-text);
        }

        .section-head p {
            color: var(--c-muted);
            font-size: 17px;
            margin: 0;
        }

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

        .text-brand {
            color: var(--c-primary);
        }

        .btn {
            border-radius: 10px;
            font-weight: 600;
            padding: 12px 28px;
            transition: all .25s ease;
            font-size: 15px;
        }

        .btn-lg {
            padding: 14px 36px;
            font-size: 16px;
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
        }

        .btn-primary {
            background: var(--c-primary) !important;
            border-color: var(--c-primary) !important;
            color: #fff !important;
            border-radius: 10px;
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--c-primary-light) !important;
            border-color: var(--c-primary-light) !important;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(31, 94, 255, .25);
            color: #fff !important;
        }

        .btn-outline-light {
            border: 1.5px solid rgba(255, 255, 255, .8);
            color: #fff;
            background: transparent;
            border-radius: 10px;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-accent {
            background: var(--c-accent) !important;
            border-color: var(--c-accent) !important;
            color: #fff !important;
        }

        .btn-accent:hover {
            background: #e69500 !important;
            border-color: #e69500 !important;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 166, 35, .3);
            color: #fff !important;
        }

        .badge-soft {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--c-primary-lighter);
            color: var(--c-primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 50px;
        }

        .badge-soft i {
            color: var(--c-primary-light);
        }

        .badge-accent {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--c-accent-light);
            color: #b45309;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 50px;
        }

        .card-custom {
            background: var(--c-white);
            border: 1px solid var(--c-border);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            transition: all .3s ease;
            height: 100%;
        }

        .card-custom:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: #d6e0f0;
        }

        .card-img-top {
            border-top-left-radius: var(--radius);
            border-top-right-radius: var(--radius);
            object-fit: cover;
        }

        .card-body-custom {
            padding: 28px;
        }

        /* ---------- Header / Nav ---------- */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, .9);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--c-border);
            box-shadow: 0 2px 12px rgba(15, 47, 95, .04);
        }

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

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            font-weight: 700;
            font-size: 19px;
            color: var(--c-text);
            white-space: nowrap;
        }

        .brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
            color: #fff;
            border-radius: 12px;
            font-size: 18px;
            box-shadow: 0 4px 14px rgba(31, 94, 255, .25);
        }

        .brand:hover {
            color: var(--c-text);
        }

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

        .nav-link {
            position: relative;
            font-size: 15px;
            font-weight: 500;
            color: var(--c-muted);
            padding: 8px 14px;
            border-radius: 8px;
            transition: all .2s ease;
        }

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

        .nav-link.active {
            color: var(--c-primary);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            background: var(--c-primary-light);
            border-radius: 2px;
        }

        .header-tools {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .search-box {
            display: flex;
            align-items: center;
            gap: 10px;
            background: var(--c-bg);
            border: 1px solid var(--c-border);
            border-radius: 50px;
            padding: 8px 16px;
            min-width: 240px;
            color: var(--c-muted);
            transition: all .25s ease;
        }

        .search-box:focus-within {
            border-color: var(--c-primary-light);
            box-shadow: 0 0 0 3px rgba(31, 94, 255, .12);
            background: var(--c-white);
        }

        .search-box input {
            border: none;
            background: transparent;
            flex: 1;
            font-size: 14px;
            color: var(--c-text);
            outline: none;
        }

        .search-box input::placeholder {
            color: #9aa5b1;
        }

        .search-kbd {
            background: var(--c-white);
            border: 1px solid var(--c-border);
            border-radius: 6px;
            font-size: 12px;
            padding: 2px 8px;
            color: var(--c-muted);
            font-family: ui-monospace, monospace;
            white-space: nowrap;
        }

        .header-cta {
            white-space: nowrap;
        }

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

        @media (max-width: 991px) {
            .nav-toggle {
                display: inline-flex;
            }
            .main-nav {
                position: fixed;
                top: 76px;
                left: 0;
                right: 0;
                background: var(--c-white);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px 24px;
                gap: 4px;
                box-shadow: 0 20px 40px rgba(15, 47, 95, .12);
                border-bottom: 1px solid var(--c-border);
                display: none;
            }
            body.nav-open .main-nav {
                display: flex;
            }
            .nav-link {
                padding: 12px 16px;
                font-size: 16px;
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-link.active {
                background: var(--c-primary-lighter);
            }
            .search-box {
                display: none;
            }
            .header-cta {
                margin-left: auto;
            }
        }

        @media (max-width: 520px) {
            .brand {
                font-size: 16px;
                gap: 8px;
            }
            .brand .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 15px;
                border-radius: 10px;
            }
            .header-cta {
                display: none;
            }
            .header-inner {
                height: 66px;
            }
            .main-nav {
                top: 66px;
            }
            .section {
                padding: 56px 0;
            }
            .section-head h2 {
                font-size: 26px;
            }
        }

        /* ---------- Hero ---------- */
        .security-hero {
            position: relative;
            padding: 120px 0 100px;
            background: linear-gradient(135deg, rgba(6, 18, 42, .88), rgba(15, 47, 95, .78)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
        }

        .security-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 80% 20%, rgba(31, 94, 255, .25), transparent 60%);
        }

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

        .hero-crumb {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .18);
            border-radius: 50px;
            padding: 6px 18px;
            font-size: 14px;
            color: rgba(255, 255, 255, .85);
            margin-bottom: 28px;
            backdrop-filter: blur(10px);
        }

        .hero-crumb a {
            color: rgba(255, 255, 255, .85);
        }

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

        .hero-crumb i {
            font-size: 12px;
            opacity: .7;
        }

        .security-hero h1 {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.25;
            margin: 0 0 20px;
            letter-spacing: 1px;
        }

        .security-hero h1 .highlight {
            color: var(--c-accent);
        }

        .security-hero .lead {
            font-size: 18px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .85);
            max-width: 560px;
            margin-bottom: 36px;
        }

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

        .hero-card {
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .15);
            border-radius: var(--radius);
            padding: 28px;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            color: #fff;
            margin-top: 20px;
            position: relative;
        }

        .hero-card .score {
            font-size: 44px;
            font-weight: 800;
            color: var(--c-accent);
            line-height: 1;
        }

        .hero-card .score-label {
            font-size: 14px;
            color: rgba(255, 255, 255, .75);
            margin-bottom: 4px;
        }

        .hero-card .progress {
            height: 8px;
            background: rgba(255, 255, 255, .15);
            border-radius: 8px;
            margin: 14px 0;
        }

        .hero-card .progress-bar {
            background: linear-gradient(90deg, var(--c-accent), #ffb84d);
            border-radius: 8px;
        }

        .hero-card ul {
            list-style: none;
            margin: 16px 0 0;
            padding: 0;
        }

        .hero-card ul li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            padding: 6px 0;
            color: rgba(255, 255, 255, .88);
        }

        .hero-card ul li i {
            color: #4ade80;
            font-size: 13px;
        }

        @media (max-width: 991px) {
            .security-hero {
                padding: 80px 0 64px;
            }
            .security-hero h1 {
                font-size: 34px;
            }
            .hero-card {
                margin-top: 32px;
            }
        }

        @media (max-width: 520px) {
            .security-hero h1 {
                font-size: 28px;
            }
            .security-hero .lead {
                font-size: 16px;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn {
                width: 100%;
                text-align: center;
            }
        }

        /* ---------- 安全能力卡片 ---------- */
        .capability-card {
            padding: 32px 28px;
            position: relative;
            overflow: hidden;
        }

        .capability-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--c-primary-light), var(--c-accent));
            opacity: 0;
            transition: opacity .3s ease;
        }

        .capability-card:hover::before {
            opacity: 1;
        }

        .capability-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            background: var(--c-primary-lighter);
            color: var(--c-primary);
            border-radius: 16px;
            font-size: 24px;
            margin-bottom: 20px;
            transition: all .3s ease;
        }

        .capability-card:hover .capability-icon {
            background: var(--c-primary);
            color: #fff;
            box-shadow: 0 6px 18px rgba(15, 47, 95, .25);
            transform: scale(1.06);
        }

        .capability-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .capability-card p {
            color: var(--c-muted);
            font-size: 15px;
            margin: 0;
            line-height: 1.75;
        }

        .capability-card .capability-tag {
            margin-top: 16px;
            font-size: 13px;
            color: var(--c-primary-light);
            font-weight: 600;
        }

        /* ---------- 安全保护体系 ---------- */
        .protection-wrap {
            display: flex;
            align-items: center;
            gap: 64px;
            background: var(--c-white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--c-border);
        }

        .protection-media {
            flex: 1;
            min-height: 380px;
            background: url('/assets/images/coverpic/cover-4.png') center/cover no-repeat;
            position: relative;
        }

        .protection-media::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, transparent 40%, var(--c-white) 100%);
        }

        .protection-content {
            flex: 1;
            padding: 48px 48px 48px 0;
        }

        .protection-content h2 {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 18px;
        }

        .protection-content .lead-text {
            color: var(--c-muted);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 28px;
        }

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

        .protection-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 12px 0;
            border-bottom: 1px solid var(--c-border);
        }

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

        .protection-list .list-icon {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            background: var(--c-primary-lighter);
            color: var(--c-primary);
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
        }

        .protection-list .list-title {
            font-weight: 600;
            font-size: 16px;
            margin-bottom: 4px;
        }

        .protection-list .list-desc {
            color: var(--c-muted);
            font-size: 14px;
            margin: 0;
        }

        @media (max-width: 991px) {
            .protection-wrap {
                flex-direction: column;
                gap: 0;
            }
            .protection-media {
                width: 100%;
                min-height: 260px;
            }
            .protection-media::after {
                background: linear-gradient(to top, transparent 30%, var(--c-white) 100%);
            }
            .protection-content {
                padding: 32px 28px;
            }
            .protection-content h2 {
                font-size: 26px;
            }
        }

        /* ---------- 安全流程 ---------- */
        .process-section {
            background: var(--c-white);
        }

        .process-step {
            text-align: center;
            padding: 32px 20px;
            position: relative;
        }

        .process-step .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
            color: #fff;
            font-weight: 700;
            font-size: 20px;
            margin-bottom: 18px;
            box-shadow: 0 8px 20px rgba(31, 94, 255, .25);
            position: relative;
            z-index: 2;
        }

        .process-step .step-icon {
            position: absolute;
            top: -10px;
            right: 50%;
            transform: translateX(150%);
            color: var(--c-accent);
            font-size: 22px;
            opacity: .35;
            z-index: 1;
        }

        .process-step h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .process-step p {
            color: var(--c-muted);
            font-size: 14px;
            margin: 0;
            line-height: 1.7;
        }

        .process-arrow {
            position: absolute;
            top: 44px;
            right: -18px;
            color: #cbd5e1;
            font-size: 18px;
            z-index: 3;
        }

        @media (max-width: 991px) {
            .process-arrow {
                display: none;
            }
        }

        /* ---------- 安全数据 ---------- */
        .stats-section {
            background: linear-gradient(135deg, #0b1f3a, #0f2f5f);
            color: #fff;
            padding: 72px 0;
        }

        .stat-item {
            text-align: center;
            padding: 24px 16px;
        }

        .stat-item .stat-number {
            font-size: 48px;
            font-weight: 800;
            color: var(--c-accent);
            line-height: 1.1;
            margin-bottom: 8px;
        }

        .stat-item .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, .78);
            letter-spacing: .5px;
        }

        .stat-item .stat-icon {
            font-size: 20px;
            color: rgba(255, 255, 255, .5);
            margin-bottom: 12px;
        }

        @media (max-width: 520px) {
            .stat-item .stat-number {
                font-size: 34px;
            }
        }

        /* ---------- 安全知识 FAQ ---------- */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }

        .accordion-item {
            border: 1px solid var(--c-border) !important;
            border-radius: var(--radius) !important;
            overflow: hidden;
            margin-bottom: 14px;
            box-shadow: var(--shadow-sm);
            background: var(--c-white);
        }

        .accordion-button {
            font-size: 16px;
            font-weight: 600;
            color: var(--c-text) !important;
            background: var(--c-white) !important;
            padding: 20px 24px;
            box-shadow: none !important;
            transition: color .2s ease;
        }

        .accordion-button:not(.collapsed) {
            color: var(--c-primary) !important;
        }

        .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%231f5eff'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
            transition: transform .3s ease;
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(31, 94, 255, .12) !important;
            border-radius: var(--radius) var(--radius) 0 0;
        }

        .accordion-body {
            padding: 4px 24px 24px;
            color: var(--c-muted);
            font-size: 15px;
            line-height: 1.8;
            border-top: 1px solid var(--c-border);
            background: #fafbfd;
        }

        /* ---------- CTA ---------- */
        .cta-section {
            background: linear-gradient(135deg, #0b1f3a 0%, #0f2f5f 50%, #143a7a 100%);
            border-radius: var(--radius);
            padding: 72px 56px;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
            margin: 96px auto;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: .15;
        }

        .cta-section .cta-inner {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, .8);
            font-size: 17px;
            max-width: 560px;
            margin: 0 auto 32px;
        }

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

        @media (max-width: 520px) {
            .cta-section {
                padding: 44px 24px;
                margin: 56px 12px;
                border-radius: 20px;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-buttons .btn {
                width: 100%;
            }
        }

        /* ---------- Footer ---------- */
        .site-footer {
            background: #0b1f3a;
            color: rgba(255, 255, 255, .72);
            padding-top: 80px;
            font-size: 15px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-brand .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--c-primary-light), var(--c-accent));
            color: #fff;
            border-radius: 12px;
            font-size: 18px;
        }

        .footer-about {
            line-height: 1.8;
            margin-bottom: 22px;
            color: rgba(255, 255, 255, .6);
            max-width: 320px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, .08);
            border-radius: 10px;
            color: rgba(255, 255, 255, .8);
            font-size: 16px;
            transition: all .25s ease;
        }

        .footer-social a:hover {
            background: var(--c-accent);
            color: #fff;
            transform: translateY(-3px);
        }

        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: .5px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 2px;
            background: var(--c-accent);
            border-radius: 2px;
        }

        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
        }

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

        .footer-links a {
            color: rgba(255, 255, 255, .65);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: all .2s ease;
        }

        .footer-links a i {
            font-size: 10px;
            color: rgba(255, 255, 255, .3);
            transition: all .2s ease;
        }

        .footer-links a:hover {
            color: var(--c-accent);
            transform: translateX(3px);
        }

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

        .footer-contact p {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 14px;
            color: rgba(255, 255, 255, .65);
            font-size: 14px;
        }

        .footer-contact p i {
            color: var(--c-accent);
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            margin-top: 64px;
            border-top: 1px solid rgba(255, 255, 255, .1);
            padding: 24px 0;
            text-align: center;
            font-size: 14px;
            color: rgba(255, 255, 255, .45);
        }

        .footer-bottom p {
            margin: 0;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, .65);
        }

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

        @media (max-width: 767px) {
            .footer-title {
                margin-top: 20px;
            }
            .site-footer {
                padding-top: 56px;
            }
        }

        /* ---------- 通用辅助 ---------- */
        .bg-white {
            background: var(--c-white);
        }

        .rounded-16 {
            border-radius: var(--radius);
        }

        .shadow-hover:hover {
            box-shadow: var(--shadow-md);
        }

/* roulang page: category3 */
:root {
            --primary: #123a63;
            --primary-dark: #0b2a4d;
            --primary-light: #e8f1fb;
            --accent: #e3a836;
            --accent-dark: #c68e1f;
            --accent-light: #fdf3dd;
            --bg: #f4f6f9;
            --bg-white: #ffffff;
            --bg-deep: #0b2a4d;
            --text: #1c2838;
            --text-secondary: #5a6b7c;
            --text-muted: #91a1b1;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow-xs: 0 1px 3px rgba(11, 42, 77, .05);
            --shadow-sm: 0 3px 12px rgba(11, 42, 77, .06);
            --shadow-md: 0 8px 28px rgba(11, 42, 77, .09);
            --shadow-lg: 0 20px 50px rgba(11, 42, 77, .14);
            --spacer: 84px;
            --transition: .25s ease;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: var(--font-family);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        .container {
            max-width: 1220px;
        }

        /* ===== 按钮 ===== */
        .btn {
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: var(--transition);
            padding: 10px 22px;
        }
        .btn-primary {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(18, 58, 99, .18);
        }
        .btn-accent {
            background: var(--accent);
            border-color: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            border-radius: 12px;
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(227, 168, 54, .32);
        }
        .btn-outline-light {
            border: 1.5px solid rgba(255, 255, 255, .65);
            color: #fff;
            border-radius: 12px;
        }
        .btn-outline-light:hover {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, .15);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1080;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-xs);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
            gap: 20px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 17px;
            color: var(--primary);
            letter-spacing: .3px;
            white-space: nowrap;
            line-height: 1.2;
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), #1f5c9e);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            box-shadow: var(--shadow-sm);
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            position: relative;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            border-radius: 2px;
            background: var(--accent);
        }
        .header-tools {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            position: relative;
            display: flex;
            align-items: center;
        }
        .search-box input {
            width: 224px;
            padding: 8px 34px 8px 34px;
            border: 1px solid var(--border);
            border-radius: 20px;
            background: #f4f6f9;
            font-size: 13px;
            color: var(--text);
            outline: 0;
            transition: var(--transition);
        }
        .search-box input:focus {
            background: #fff;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(18, 58, 99, .08);
        }
        .search-box > i {
            position: absolute;
            left: 12px;
            color: var(--text-muted);
            font-size: 13px;
            pointer-events: none;
        }
        .search-kbd {
            position: absolute;
            right: 10px;
            font-size: 11px;
            color: var(--text-muted);
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 5px;
            padding: 1px 7px;
            pointer-events: none;
            line-height: 1.5;
            font-family: var(--font-family);
        }
        .header-cta {
            border-radius: 20px;
            font-weight: 700;
        }
        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border: 1px solid var(--border);
            background: #fff;
            border-radius: 10px;
            color: var(--text);
            font-size: 16px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .nav-toggle:hover {
            color: var(--primary);
            border-color: var(--primary);
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            background-size: cover;
            background-position: center;
            padding: 96px 0 108px;
            color: #fff;
            overflow: hidden;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(9, 32, 58, .94) 0%, rgba(11, 42, 77, .80) 45%, rgba(18, 58, 99, .48) 100%);
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, .75);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }
        .page-breadcrumb a {
            color: rgba(255, 255, 255, .85);
        }
        .page-breadcrumb a:hover {
            color: var(--accent);
        }
        .page-breadcrumb i {
            font-size: 10px;
            color: rgba(255, 255, 255, .5);
        }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .14);
            border: 1px solid rgba(255, 255, 255, .25);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 20px;
            backdrop-filter: blur(6px);
        }
        .page-hero h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .hero-desc {
            font-size: 17px;
            max-width: 660px;
            color: rgba(255, 255, 255, .88);
            line-height: 1.8;
        }
        .hero-btns {
            margin-top: 28px;
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .hero-btns .btn {
            min-width: 160px;
        }

        /* ===== Section 通用 ===== */
        .section {
            padding: var(--spacer) 0;
        }
        .section-alt {
            background: var(--bg-white);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .section-deep {
            background: var(--bg-deep);
            color: #fff;
        }
        .section-head {
            max-width: 720px;
            margin: 0 auto 48px;
            text-align: center;
        }
        .section-head .kicker {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 2px;
            color: var(--accent-dark);
            background: var(--accent-light);
            padding: 5px 14px;
            border-radius: 30px;
            margin-bottom: 14px;
        }
        .section-head h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: .5px;
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .section-head p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== 统计卡片 ===== */
        .stat-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 30px 24px;
            text-align: center;
            height: 100%;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .stat-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 24px;
            right: 24px;
            height: 3px;
            border-radius: 0 0 6px 6px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .stat-card:hover::before {
            opacity: 1;
        }
        .stat-card .stat-icon {
            width: 56px;
            height: 56px;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 16px;
            font-size: 22px;
            color: var(--primary);
            background: var(--primary-light);
        }
        .stat-card .stat-num {
            font-size: 38px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .stat-card .stat-label {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin-top: 10px;
        }
        .stat-card .stat-desc {
            margin-top: 6px;
            color: var(--text-muted);
            font-size: 13px;
            line-height: 1.6;
        }

        /* ===== 等级卡片 ===== */
        .tier-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 34px 26px 26px;
            height: 100%;
            position: relative;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .tier-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .tier-card.featured {
            border: 2px solid var(--accent);
            box-shadow: var(--shadow-lg);
        }
        .tier-card .tier-badge {
            position: absolute;
            top: -12px;
            right: 20px;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 12px;
            font-weight: 800;
            padding: 3px 12px;
            border-radius: 20px;
            letter-spacing: .5px;
        }
        .tier-card .tier-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 21px;
            color: #fff;
            margin-bottom: 18px;
            box-shadow: var(--shadow-sm);
        }
        .tier-card .tier-name {
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
        }
        .tier-card .tier-tag {
            display: inline-flex;
            margin-top: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--text-secondary);
            background: var(--bg);
            padding: 4px 12px;
            border-radius: 20px;
        }
        .tier-card ul {
            list-style: none;
            margin: 20px 0 0;
            padding: 0;
            flex: 1;
        }
        .tier-card ul li {
            display: flex;
            gap: 10px;
            align-items: flex-start;
            padding: 8px 0;
            font-size: 14px;
            color: var(--text-secondary);
            border-bottom: 1px dashed var(--border);
        }
        .tier-card ul li:last-child {
            border-bottom: 0;
        }
        .tier-card ul li i {
            color: #2fa36b;
            margin-top: 5px;
            font-size: 12px;
        }

        /* ===== Feature 图文 ===== */
        .feature-block {
            display: flex;
            align-items: center;
            gap: 52px;
            padding: 28px 0;
        }
        .feature-block + .feature-block {
            margin-top: 64px;
        }
        .feature-block:nth-child(even) {
            flex-direction: row-reverse;
        }
        .feature-media {
            flex: 1;
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .feature-media img {
            width: 100%;
            object-fit: cover;
            aspect-ratio: 16 / 10;
            transition: transform .6s ease;
        }
        .feature-media:hover img {
            transform: scale(1.04);
        }
        .feature-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(20deg, rgba(11, 42, 77, .20), transparent 55%);
            pointer-events: none;
        }
        .feature-body {
            flex: 1;
        }
        .feature-body .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 13px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 19px;
            margin-bottom: 16px;
        }
        .feature-body h3 {
            font-size: 23px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .feature-body p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 12px;
        }
        .feature-list {
            list-style: none;
            padding: 0;
            margin: 14px 0 0;
        }
        .feature-list li {
            display: flex;
            gap: 10px;
            align-items: center;
            font-size: 14px;
            color: var(--text-secondary);
            padding: 5px 0;
        }
        .feature-list li i {
            color: var(--accent-dark);
            font-size: 14px;
        }

        /* ===== Process ===== */
        .process-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .process-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 30px 22px;
            text-align: center;
            position: relative;
            transition: var(--transition);
        }
        .process-item:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }
        .process-item .step-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 46px;
            height: 46px;
            margin: 0 auto 18px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 800;
            font-size: 17px;
            box-shadow: 0 6px 16px rgba(18, 58, 99, .28);
        }
        .process-item .step-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }
        .process-item .step-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }
        .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius) !important;
            overflow: hidden;
            margin-bottom: 14px;
            box-shadow: var(--shadow-xs);
        }
        .accordion-button {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            padding: 20px 24px;
            background: #fff;
            line-height: 1.5;
        }
        .accordion-button:not(.collapsed) {
            background: var(--primary-light);
            color: var(--primary);
            box-shadow: none;
        }
        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(18, 58, 99, .12);
            border-color: transparent;
        }
        .accordion-button::after {
            background-size: 1rem;
            opacity: .6;
        }
        .accordion-body {
            padding: 20px 24px 22px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
            background: #fff;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            background: var(--bg-deep);
            padding: 76px 0;
            color: #fff;
            overflow: hidden;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            top: -40%;
            right: -8%;
            width: 520px;
            height: 520px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(227, 168, 54, .22), transparent 62%);
        }
        .cta-section::after {
            content: "";
            position: absolute;
            bottom: -36%;
            left: 8%;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(31, 92, 158, .35), transparent 65%);
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-inner h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: .5px;
        }
        .cta-inner p {
            font-size: 16px;
            color: rgba(255, 255, 255, .75);
            max-width: 560px;
            margin: 0 auto 30px;
            line-height: 1.8;
        }
        .cta-btns {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .cta-btns .btn {
            min-width: 168px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0b2238;
            color: #aab8c7;
            padding: 68px 0 0;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), #1f5c9e);
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
        }
        .footer-about {
            font-size: 14px;
            line-height: 1.8;
            color: #8296a8;
            margin-bottom: 20px;
            max-width: 340px;
        }
        .footer-social {
            display: flex;
            gap: 10px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, .08);
            border-radius: 10px;
            color: #aab8c7;
            font-size: 16px;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-3px);
        }
        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: .5px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: #8296a8;
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-links a i {
            font-size: 11px;
            transition: transform .2s;
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-contact p {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: #8296a8;
            margin-bottom: 10px;
            margin-left: 0;
        }
        .footer-contact i {
            color: var(--accent);
            width: 16px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            margin-top: 44px;
            padding: 22px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 13px;
            color: #667c8f;
        }
        .footer-bottom p {
            margin: 0;
        }
        .footer-bottom a {
            color: #8296a8;
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .search-box input {
                width: 170px;
            }
            .main-nav {
                gap: 2px;
            }
            .nav-link {
                padding: 8px 10px;
                font-size: 14px;
            }
            .process-wrap {
                gap: 16px;
            }
        }
        @media (max-width: 991px) {
            .main-nav {
                position: fixed;
                top: 0;
                right: 0;
                bottom: 0;
                width: 280px;
                background: #fff;
                flex-direction: column;
                align-items: flex-start;
                padding: 88px 24px 24px;
                box-shadow: var(--shadow-lg);
                transform: translateX(100%);
                transition: transform .3s ease;
                z-index: 1090;
                border-left: 1px solid var(--border);
                gap: 6px;
            }
            body.nav-open .main-nav {
                transform: translateX(0);
            }
            .main-nav .nav-link {
                width: 100%;
                font-size: 16px;
                padding: 12px 14px;
                color: var(--text);
            }
            .main-nav .nav-link:hover {
                background: var(--primary-light);
                color: var(--primary);
            }
            .main-nav .nav-link.active {
                background: var(--primary-light);
                border-radius: 10px;
                color: var(--primary);
            }
            .main-nav .nav-link.active::after {
                display: none;
            }
            .nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
                position: relative;
                z-index: 1100;
            }
            body.nav-open .nav-toggle {
                color: var(--primary);
                border-color: var(--primary);
            }
            body.nav-open {
                overflow: hidden;
            }
            .search-box {
                display: none;
            }
            .feature-block,
            .feature-block:nth-child(even) {
                flex-direction: column;
                gap: 28px;
                padding: 12px 0;
            }
            .feature-media {
                width: 100%;
            }
            .feature-body {
                width: 100%;
                text-align: left;
            }
            .process-wrap {
                grid-template-columns: repeat(2, 1fr);
            }
            .page-hero h1 {
                font-size: 34px;
            }
            .section-head h2 {
                font-size: 26px;
            }
        }
        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }
            .page-hero {
                padding: 72px 0 84px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero .hero-desc {
                font-size: 15px;
            }
            .stat-card .stat-num {
                font-size: 32px;
            }
            .cta-inner h2 {
                font-size: 27px;
            }
            .footer-bottom {
                flex-direction: column;
                justify-content: center;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .header-cta {
                display: none;
            }
            .brand {
                font-size: 15px;
            }
            .brand-icon {
                width: 34px;
                height: 34px;
                font-size: 14px;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .hero-btns .btn {
                min-width: 100%;
                margin: 0;
            }
            .process-wrap {
                grid-template-columns: 1fr;
            }
            .section-head h2 {
                font-size: 23px;
            }
            .feature-body h3 {
                font-size: 20px;
            }
            .cta-btns .btn {
                min-width: 100%;
            }
            .tier-card {
                padding: 24px 18px;
            }
            .accordion-button {
                font-size: 14px;
                padding: 16px 18px;
            }
            .accordion-body {
                padding: 16px 18px 18px;
            }
        }