/* roulang page: index */
:root {
            --primary: #1a2b4a;
            --primary-light: #243b66;
            --primary-dark: #0f1a30;
            --accent: #f97316;
            --accent-dark: #ea580c;
            --accent-light: #ffedd5;
            --bg: #f6f8fb;
            --bg-gray: #eef1f6;
            --white: #ffffff;
            --text: #0f172a;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius: 14px;
            --radius-lg: 24px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
            --shadow-md: 0 6px 20px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
            --transition: all 0.3s ease;
            --container: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

        body {
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

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

        .section {
            padding: 80px 0;
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 1px;
            text-transform: uppercase;
            color: var(--accent);
            background: var(--accent-light);
            padding: 6px 16px;
            border-radius: 40px;
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 36px;
            font-weight: 900;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .section-subtitle {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 640px;
            line-height: 1.7;
        }

        .text-center {
            text-align: center;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            line-height: 1;
            cursor: pointer;
            text-decoration: none;
            transition: var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 16px rgba(249, 115, 22, 0.35);
        }

        .btn-primary:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(249, 115, 22, 0.45);
            color: #fff;
        }

        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.5);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

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

        .btn-dark:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-sm {
            padding: 9px 18px;
            font-size: 14px;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(249, 115, 22, 0.4);
            outline-offset: 2px;
        }

        .badge {
            display: inline-block;
            background: var(--accent-light);
            color: var(--accent-dark);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: 0.3px;
        }

        .badge-blue {
            background: #e0edff;
            color: #1e56a0;
        }

        .badge-green {
            background: #dcfce7;
            color: #15803d;
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            height: 68px;
        }

        .brand {
            font-size: 18px;
            font-weight: 900;
            color: var(--primary);
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .brand-icon {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 15px;
            font-weight: 900;
        }

        .brand:hover {
            opacity: 0.88;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-left: 8px;
        }

        .nav-link {
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            border-radius: 30px;
            transition: var(--transition);
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--primary);
            background: #f1f5f9;
        }

        .nav-link.active {
            color: var(--primary);
            font-weight: 700;
            background: #eef2ff;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-gray);
            border-radius: 40px;
            padding: 7px 8px 7px 16px;
            border: 1px solid transparent;
            transition: var(--transition);
            min-width: 200px;
        }

        .search-box:focus-within {
            background: #fff;
            border-color: var(--accent);
            box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.12);
        }

        .search-box input {
            width: 100%;
            font-size: 14px;
            color: var(--text);
            background: transparent;
        }

        .search-box input::placeholder {
            color: var(--text-muted);
        }

        .search-box button {
            background: var(--accent);
            color: #fff;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            flex-shrink: 0;
        }

        .search-box button:hover {
            background: var(--accent-dark);
        }

        .nav-toggle {
            display: none;
            background: var(--bg-gray);
            width: 40px;
            height: 40px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary);
            cursor: pointer;
            transition: var(--transition);
        }

        .nav-toggle:hover {
            background: #e2e8f0;
        }

        /* Hero */
        .hero {
            position: relative;
            background: linear-gradient(135deg, rgba(10, 19, 38, 0.94) 0%, rgba(22, 38, 68, 0.88) 55%, rgba(35, 55, 92, 0.78) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding: 140px 0 100px;
            min-height: 660px;
            display: flex;
            align-items: center;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.08fr 0.92fr;
            gap: 60px;
            align-items: center;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 7px 18px;
            border-radius: 40px;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
        }

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

        .hero h1 {
            font-size: 46px;
            font-weight: 900;
            color: #fff;
            line-height: 1.25;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }

        .hero h1 span {
            color: var(--accent);
        }

        .hero-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.82);
            line-height: 1.8;
            max-width: 520px;
            margin-bottom: 32px;
        }

        .hero-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .hero-trust {
            display: flex;
            gap: 24px;
            margin-top: 40px;
            flex-wrap: wrap;
        }

        .hero-trust-item {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 13px;
        }

        .hero-trust-item i {
            color: #4ade80;
            font-size: 16px;
        }

        .quick-login-card {
            background: rgba(255, 255, 255, 0.98);
            border-radius: 24px;
            padding: 36px 32px;
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
            backdrop-filter: blur(8px);
        }

        .quick-login-card .card-title {
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 4px;
        }

        .quick-login-card .card-subtitle {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .form-group {
            margin-bottom: 18px;
        }

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
        }

        .form-group .input-wrap {
            position: relative;
        }

        .form-group .input-wrap i {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 15px;
        }

        .form-group input {
            width: 100%;
            padding: 13px 14px 13px 42px;
            border: 1.5px solid var(--border);
            border-radius: 12px;
            font-size: 15px;
            transition: var(--transition);
            background: #f8fafc;
        }

        .form-group input:focus {
            border-color: var(--accent);
            background: #fff;
            box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.12);
        }

        .login-form .btn {
            width: 100%;
            margin-top: 8px;
            padding: 15px;
        }

        .login-hint {
            font-size: 13px;
            color: var(--text-muted);
            text-align: center;
            margin-top: 16px;
        }

        .login-hint a {
            color: var(--accent);
            font-weight: 600;
        }

        .login-hint a:hover {
            color: var(--accent-dark);
        }

        /* Stats Bar */
        .stats-bar {
            background: var(--primary);
            padding: 32px 0;
            margin-top: -1px;
        }

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

        .stat-item {
            text-align: center;
            padding: 12px 20px;
        }

        .stat-number {
            font-size: 34px;
            font-weight: 900;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.5px;
        }

        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 4px;
        }

        /* About */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .about-media {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .about-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 360px;
            transition: transform 0.5s ease;
        }

        .about-media:hover img {
            transform: scale(1.03);
        }

        .about-media::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(15, 23, 42, 0.35));
        }

        .about-media .about-badge {
            position: absolute;
            bottom: 20px;
            left: 20px;
            z-index: 2;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            border-radius: 16px;
            padding: 14px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            box-shadow: var(--shadow-md);
        }

        .about-media .about-badge i {
            font-size: 28px;
            color: var(--accent);
        }

        .about-media .about-badge strong {
            display: block;
            font-size: 16px;
            color: var(--text);
        }

        .about-media .about-badge span {
            font-size: 13px;
            color: var(--text-muted);
        }

        .about-content h2 {
            font-size: 34px;
            font-weight: 900;
            line-height: 1.3;
            margin-bottom: 18px;
        }

        .about-content h2 em {
            font-style: normal;
            color: var(--accent);
        }

        .about-text {
            color: var(--text-muted);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .about-list {
            display: grid;
            gap: 14px;
            margin-bottom: 28px;
        }

        .about-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--text);
        }

        .about-list li i {
            color: var(--accent);
            margin-top: 5px;
            font-size: 16px;
            flex-shrink: 0;
        }

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

        .cats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 44px;
        }

        .cat-card {
            border-radius: 20px;
            background: var(--white);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .cat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(249, 115, 22, 0.3);
        }

        .cat-card-media {
            position: relative;
            height: 180px;
            overflow: hidden;
        }

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

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

        .cat-card-media::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(15, 23, 42, 0.5));
        }

        .cat-card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .cat-card-body h3 {
            font-size: 19px;
            font-weight: 800;
            margin-bottom: 10px;
            color: var(--text);
        }

        .cat-card-body p {
            font-size: 14.5px;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 18px;
        }

        .cat-card-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
        }

        .cat-card-link i {
            transition: transform 0.3s ease;
        }

        .cat-card-link:hover {
            color: var(--accent-dark);
        }

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

        /* Posts */
        .posts-section {
            background: var(--bg);
        }

        .posts-header {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            margin-bottom: 12px;
        }

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

        .post-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 18px;
            padding: 28px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-sm);
        }

        .post-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: rgba(26, 43, 74, 0.18);
        }

        .post-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 14px;
        }

        .post-meta .badge {
            font-size: 11px;
        }

        .post-card h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
            color: var(--text);
        }

        .post-card h3 a:hover {
            color: var(--accent);
        }

        .post-card p {
            font-size: 14.5px;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }

        .read-more {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }

        .read-more i {
            transition: transform 0.3s ease;
            font-size: 12px;
        }

        .read-more:hover {
            color: var(--accent);
        }

        .read-more:hover i {
            transform: translateX(4px);
        }

        .empty-state {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            background: var(--white);
            border-radius: 18px;
            border: 2px dashed var(--border);
            color: var(--text-muted);
            font-size: 16px;
        }

        .empty-state i {
            font-size: 40px;
            display: block;
            margin-bottom: 16px;
            color: #cbd5e1;
        }

        /* Steps */
        .steps-section {
            background: var(--primary-dark);
            position: relative;
            overflow: hidden;
        }

        .steps-section::before {
            content: '';
            position: absolute;
            top: -160px;
            right: -160px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(249, 115, 22, 0.18), transparent 65%);
        }

        .steps-section .section-title {
            color: #fff;
        }

        .steps-section .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            margin-top: 48px;
            position: relative;
            z-index: 2;
        }

        .step-item {
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 20px;
            padding: 30px 24px;
            text-align: center;
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }

        .step-item:hover {
            background: rgba(255, 255, 255, 0.13);
            transform: translateY(-4px);
        }

        .step-num {
            width: 52px;
            height: 52px;
            border-radius: 16px;
            background: linear-gradient(135deg, var(--accent), #fb923c);
            color: #fff;
            font-size: 20px;
            font-weight: 900;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            box-shadow: 0 8px 20px rgba(249, 115, 22, 0.35);
        }

        .step-item h3 {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.7;
        }

        /* Features */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 44px;
        }

        .feature-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 18px;
            padding: 28px 24px;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: rgba(249, 115, 22, 0.25);
        }

        .feature-icon {
            width: 54px;
            height: 54px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
            color: var(--accent);
            background: var(--accent-light);
        }

        .feature-icon.blue {
            background: #e0edff;
            color: #2563eb;
        }

        .feature-icon.green {
            background: #dcfce7;
            color: #16a34a;
        }

        .feature-icon.purple {
            background: #ede9fe;
            color: #7c3aed;
        }

        .feature-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

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

        .faq-wrap {
            max-width: 820px;
            margin: 44px auto 0;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: 14px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
            background: var(--white);
        }

        .faq-item:hover {
            border-color: rgba(249, 115, 22, 0.3);
        }

        .faq-item.active {
            box-shadow: var(--shadow-md);
            border-color: rgba(249, 115, 22, 0.2);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            transition: var(--transition);
            gap: 16px;
        }

        .faq-question:hover {
            color: var(--accent);
        }

        .faq-question i {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--accent);
        }

        .faq-answer {
            display: none;
            padding: 0 24px 22px;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.75;
            border-top: 1px solid var(--border);
            padding-top: 16px;
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        /* CTA */
        .cta-section {
            position: relative;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(26, 43, 74, 0.82) 100%), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            padding: 90px 0;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 36px;
            font-weight: 900;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 32px;
        }

        .cta-btns {
            display: flex;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 40px;
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 900;
            color: #fff;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-brand .brand-icon {
            width: 36px;
            height: 36px;
            font-size: 16px;
        }

        .footer-desc {
            font-size: 14.5px;
            line-height: 1.7;
            margin-bottom: 20px;
        }

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

        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 16px;
            transition: var(--transition);
        }

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

        .footer-title {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            font-size: 14.5px;
            color: rgba(255, 255, 255, 0.65);
            transition: var(--transition);
        }

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

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 14px;
            font-size: 14.5px;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            text-align: center;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.5);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .header-inner {
                gap: 12px;
            }

            .main-nav {
                display: none;
            }

            .header-actions .search-box {
                min-width: 140px;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: #fff;
                padding: 16px 24px;
                box-shadow: var(--shadow-lg);
                gap: 4px;
                border-bottom: 1px solid var(--border);
            }

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

            .hero {
                padding: 120px 0 80px;
            }

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

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

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

            .cats-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 20px;
            }

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

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

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

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

        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }

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

            .header-actions .search-box {
                display: none;
            }

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

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

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

            .hero {
                min-height: auto;
                padding: 110px 0 70px;
            }

            .quick-login-card {
                padding: 28px 24px;
            }

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

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

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

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

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

            .brand {
                font-size: 15px;
            }

            .brand-icon {
                width: 30px;
                height: 30px;
                font-size: 13px;
            }

            .header-actions .btn-sm {
                display: none;
            }

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

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

            .btn {
                padding: 12px 22px;
                font-size: 14px;
            }

            .about-content h2 {
                font-size: 26px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .stat-number {
                font-size: 26px;
            }

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

            .footer-bottom {
                font-size: 12px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --primary-light: #dbeafe;
            --primary-lighter: #eff6ff;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --bg-body: #f8fafc;
            --bg-surface: #ffffff;
            --bg-soft: #f1f5f9;
            --text-strong: #0f172a;
            --text-body: #334155;
            --text-weak: #64748b;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
            --shadow-md: 0 4px 20px rgba(15, 23, 42, 0.07);
            --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.10);
            --space-xs: 8px;
            --space-sm: 16px;
            --space-md: 32px;
            --space-lg: 64px;
            --space-xl: 96px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            color: var(--text-body);
            background: var(--bg-body);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

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

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: 2px solid transparent;
            border-radius: 10px;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1.2;
            cursor: pointer;
            transition: all .25s ease;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
        }

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

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-lg {
            padding: 16px 36px;
            font-size: 16px;
            border-radius: 12px;
        }

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

        .btn:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.4);
            outline-offset: 2px;
        }

        /* ===== Header ===== */
        .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 var(--border-light);
            box-shadow: 0 1px 4px rgba(15, 23, 42, 0.03);
        }

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

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text-strong);
            white-space: nowrap;
            flex-shrink: 0;
        }

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

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }

        .nav-link {
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            transition: all .2s ease;
            position: relative;
        }

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

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

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

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-soft);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 0 8px;
            transition: all .25s ease;
            overflow: hidden;
        }

        .search-box:focus-within {
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        .search-box input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 14px;
            padding: 8px 10px;
            width: 140px;
            color: var(--text-strong);
        }

        .search-box button {
            background: transparent;
            border: none;
            color: var(--text-weak);
            cursor: pointer;
            padding: 8px;
            display: flex;
            align-items: center;
            transition: color .2s ease;
        }

        .search-box button:hover {
            color: var(--primary);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: none;
            font-size: 22px;
            color: var(--text-strong);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: all .2s ease;
        }

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

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            padding: 96px 0 88px;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(30, 64, 175, 0.85)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
            text-align: center;
            overflow: hidden;
        }

        .page-hero::after {
            content: "";
            position: absolute;
            bottom: -60px;
            left: 50%;
            transform: translateX(-50%);
            width: 900px;
            height: 200px;
            background: radial-gradient(ellipse, rgba(255, 255, 255, 0.12), transparent 70%);
            pointer-events: none;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 40px;
            padding: 8px 20px;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            backdrop-filter: blur(8px);
            margin-bottom: 24px;
        }

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

        .page-hero h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            color: #fff;
        }

        .hero-subtitle {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.6;
        }

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

        .hero-metrics {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 56px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .hero-metric {
            text-align: center;
        }

        .hero-metric .num {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

        .hero-metric .label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 4px;
        }

        /* ===== Section common ===== */
        .section {
            padding: var(--space-lg) 0;
        }

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

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 48px;
        }

        .section-tag {
            display: inline-block;
            background: var(--primary-lighter);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border-radius: 30px;
            padding: 6px 18px;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .section-head h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text-strong);
            margin-bottom: 12px;
            line-height: 1.25;
            letter-spacing: -0.3px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-weak);
            line-height: 1.6;
        }

        /* ===== Entry cards ===== */
        .entry-grid {
            margin-top: 8px;
        }

        .entry-card {
            background: var(--bg-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all .3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

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

        .entry-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }

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

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

        .entry-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(15, 23, 42, 0.15));
        }

        .entry-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .entry-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: var(--primary-lighter);
            color: var(--primary);
            font-size: 20px;
            margin-bottom: 16px;
            transition: all .3s ease;
        }

        .entry-card:hover .entry-icon {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }

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

        .entry-body p {
            font-size: 14px;
            color: var(--text-weak);
            line-height: 1.6;
            flex: 1;
        }

        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            margin-top: 16px;
            transition: gap .2s ease;
        }

        .text-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* ===== Flow ===== */
        .flow-section {
            background: var(--bg-surface);
        }

        .flow-list {
            max-width: 760px;
            margin: 0 auto;
            position: relative;
        }

        .flow-list::before {
            content: "";
            position: absolute;
            top: 0;
            bottom: 0;
            left: 28px;
            width: 3px;
            border-radius: 3px;
            background: linear-gradient(180deg, var(--primary-light), var(--primary));
        }

        .flow-item {
            display: flex;
            gap: 32px;
            margin-bottom: 32px;
            position: relative;
        }

        .flow-item:last-child {
            margin-bottom: 0;
        }

        .flow-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            flex-shrink: 0;
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
            z-index: 1;
            border: 4px solid var(--bg-surface);
        }

        .flow-card {
            background: var(--bg-soft);
            border-radius: var(--radius-md);
            padding: 24px 28px;
            flex: 1;
            border: 1px solid var(--border-light);
            transition: all .3s ease;
        }

        .flow-card:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-md);
        }

        .flow-card h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 8px;
        }

        .flow-card p {
            font-size: 15px;
            color: var(--text-weak);
            line-height: 1.6;
        }

        /* ===== Comparison ===== */
        .compare-grid .cell {
            margin-bottom: 24px;
        }

        .compare-card {
            background: var(--bg-surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            text-align: center;
            height: 100%;
            transition: all .3s ease;
        }

        .compare-card:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .compare-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: var(--accent-light);
            color: var(--accent);
            font-size: 22px;
            margin-bottom: 16px;
        }

        .compare-card h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 16px;
        }

        .compare-card ul {
            list-style: none;
            text-align: left;
            margin-bottom: 0;
        }

        .compare-card ul li {
            font-size: 14px;
            color: var(--text-body);
            padding: 6px 0;
            display: flex;
            align-items: center;
            gap: 10px;
            border-bottom: 1px dashed var(--border-light);
        }

        .compare-card ul li:last-child {
            border-bottom: none;
        }

        .compare-card ul li i {
            color: var(--primary);
            font-size: 14px;
        }

        /* ===== Security ===== */
        .security-section {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(30, 64, 175, 0.88)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
        }

        .security-section .section-tag {
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
        }

        .security-section .section-head h2 {
            color: #fff;
        }

        .security-section .section-head p {
            color: rgba(255, 255, 255, 0.75);
        }

        .security-grid {
            margin-top: 8px;
        }

        .security-item {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            height: 100%;
            backdrop-filter: blur(6px);
            transition: all .3s ease;
        }

        .security-item:hover {
            background: rgba(255, 255, 255, 0.14);
            transform: translateY(-4px);
        }

        .security-item .sec-icon {
            font-size: 24px;
            color: var(--accent);
            margin-bottom: 14px;
        }

        .security-item h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .security-item p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            transition: all .25s ease;
            overflow: hidden;
        }

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

        .faq-item details>summary {
            list-style: none;
            padding: 22px 28px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-strong);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: all .2s ease;
            gap: 16px;
        }

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

        .faq-item details>summary::after {
            content: "\f067";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            font-size: 14px;
            color: var(--primary);
            transition: transform .3s ease;
            flex-shrink: 0;
        }

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

        .faq-item details>summary:hover {
            color: var(--primary);
        }

        .faq-item details .faq-answer {
            padding: 0 28px 24px;
            font-size: 15px;
            color: var(--text-weak);
            line-height: 1.7;
            border-top: 1px solid var(--border-light);
            margin: 0 28px;
            padding: 16px 0 22px;
        }

        .faq-item details .faq-answer p {
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 64px 0;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -80px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }

        .cta-section::after {
            content: "";
            position: absolute;
            bottom: -60px;
            left: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
        }

        .cta-content {
            text-align: center;
            color: #fff;
            position: relative;
            z-index: 1;
        }

        .cta-content h2 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 14px;
            color: #fff;
        }

        .cta-content p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-content .btn-primary {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
        }

        .cta-content .btn-primary:hover {
            background: var(--primary-lighter);
            border-color: var(--primary-lighter);
            transform: translateY(-2px);
        }

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

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

        /* ===== Footer ===== */
        .site-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 64px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 40px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 20px;
            color: #94a3b8;
        }

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

        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.08);
            color: #cbd5e1;
            font-size: 16px;
            transition: all .25s ease;
        }

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

        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

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

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

        .footer-links a {
            color: #94a3b8;
            font-size: 14px;
            transition: all .2s ease;
        }

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

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

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            margin-bottom: 12px;
            color: #94a3b8;
            line-height: 1.5;
        }

        .footer-contact li i {
            color: var(--primary);
            margin-top: 3px;
            width: 16px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: #64748b;
            margin-bottom: 0;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .main-nav {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                padding: 16px;
                flex-direction: column;
                gap: 8px;
                align-items: stretch;
            }

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

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

            .nav-link.active::after {
                bottom: 4px;
            }

            .header-actions {
                gap: 8px;
            }

            .search-box {
                display: none;
            }

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

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

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

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }

            .page-hero {
                padding: 64px 0 56px;
            }

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

            .hero-subtitle {
                font-size: 16px;
            }

            .hero-metrics {
                gap: 24px;
                margin-top: 40px;
            }

            .hero-metric .num {
                font-size: 22px;
            }

            .section-head h2 {
                font-size: 28px;
            }

            .flow-list::before {
                left: 20px;
            }

            .flow-num {
                width: 44px;
                height: 44px;
                font-size: 15px;
            }

            .flow-item {
                gap: 20px;
            }

            .flow-card {
                padding: 18px 20px;
            }

            .compare-card {
                padding: 24px 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

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

            .header-inner {
                min-height: 64px;
                gap: 12px;
            }

            .brand {
                font-size: 15px;
            }

            .brand-icon {
                width: 30px;
                height: 30px;
                font-size: 15px;
                border-radius: 8px;
            }

            .nav {
                gap: 2px;
            }

            .nav-link {
                padding: 6px 10px;
                font-size: 13px;
            }

            .header-actions .btn {
                display: none;
            }

            .page-hero h1 {
                font-size: 24px;
            }

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

            .hero-actions {
                flex-direction: column;
                gap: 12px;
            }

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

            .hero-metrics {
                flex-direction: column;
                gap: 16px;
            }

            .entry-card .entry-img {
                height: 140px;
            }

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

            .flow-item {
                gap: 16px;
                flex-direction: column;
            }

            .flow-list::before {
                left: 20px;
            }

            .flow-num {
                margin-left: 0;
            }

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

/* roulang page: article */
:root {
    --primary: #E63946;
    --primary-dark: #C1121F;
    --primary-light: #FFEBED;
    --secondary: #1D3557;
    --secondary-dark: #101D33;
    --accent: #FFB703;
    --accent-soft: #FFF6DF;
    --bg: #F6F8FB;
    --surface: #FFFFFF;
    --text: #1E1E2E;
    --text-muted: #6B7280;
    --border: #E5E7EB;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;
    --shadow-sm: 0 2px 10px rgba(29,53,87,.06);
    --shadow-md: 0 10px 28px rgba(29,53,87,.10);
    --shadow-lg: 0 20px 50px rgba(29,53,87,.16);
    --section-space: 72px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color .25s ease; }
ul { list-style: none; }
button { font-family: inherit; }
::selection { background: rgba(230,57,70,.16); color: var(--primary-dark); }
a:focus-visible, button:focus-visible, input:focus-visible {
    outline: 3px solid rgba(230,57,70,.35);
    outline-offset: 2px;
    border-radius: 6px;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 30px;
    border-radius: 999px;
    font-weight: 700;
    font-size: .94rem;
    border: none;
    cursor: pointer;
    transition: all .28s ease;
    line-height: 1.4;
    white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 6px 18px rgba(230,57,70,.30); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(230,57,70,.40); }
.btn-sm { padding: 8px 18px; font-size: .84rem; }
.btn-outline { background: transparent; border: 2px solid rgba(255,255,255,.72); color: #fff; }
.btn-outline:hover { background: #fff; color: var(--secondary); transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--secondary); box-shadow: 0 8px 20px rgba(0,0,0,.16); }
.btn-light:hover { background: var(--accent); color: var(--secondary); transform: translateY(-2px); box-shadow: 0 12px 26px rgba(0,0,0,.22); }

.site-header {
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(229,231,235,.65);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.12rem; color: var(--secondary); letter-spacing: .01em; }
.brand-icon {
    width: 38px; height: 38px; flex-shrink: 0;
    border-radius: 11px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    display: inline-flex; align-items: center; justify-content: center;
    font-weight: 900; font-size: 1.02rem;
    box-shadow: 0 6px 14px rgba(230,57,70,.30);
}
.main-nav { display: flex; gap: 4px; }
.nav-link {
    padding: 9px 16px;
    border-radius: 999px;
    font-size: .90rem;
    font-weight: 600;
    color: #4B5563;
    transition: all .24s ease;
}
.nav-link:hover { color: var(--primary); background: var(--primary-light); }
.nav-link.active { color: var(--primary); background: var(--primary-light); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.search-box {
    display: flex; align-items: center;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0 6px 0 16px;
    height: 40px;
    width: 220px;
    transition: border-color .25s, box-shadow .25s;
}
.search-box:focus-within { border-color: rgba(230,57,70,.45); box-shadow: 0 0 0 4px rgba(230,57,70,.08); }
.search-box input { border: none; background: transparent; outline: none; font-size: .88rem; flex: 1; min-width: 0; color: var(--text); }
.search-box input::placeholder { color: #9CA3AF; }
.search-box button {
    width: 30px; height: 30px; flex-shrink: 0;
    border-radius: 50%;
    border: none;
    background: var(--secondary);
    color: #fff;
    cursor: pointer;
    font-size: .80rem;
    transition: background .25s, transform .25s;
}
.search-box button:hover { background: var(--primary); transform: scale(1.06); }
.nav-toggle {
    display: none;
    background: var(--bg);
    border: 1px solid var(--border);
    width: 40px; height: 40px;
    border-radius: 10px;
    color: var(--text);
    font-size: 1rem;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: all .25s;
}
.nav-toggle:hover { border-color: var(--primary); color: var(--primary); }

.article-hero {
    position: relative;
    padding: 70px 0 64px;
    background: linear-gradient(78deg, rgba(13,27,52,.94) 0%, rgba(29,53,87,.86) 55%, rgba(230,57,70,.42) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    color: #fff;
    overflow: hidden;
}
.article-hero::after {
    content: "";
    position: absolute;
    width: 360px; height: 360px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255,183,3,.14), transparent 70%);
    top: -120px; right: -80px;
    pointer-events: none;
}
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: .85rem; color: rgba(255,255,255,.70); margin-bottom: 24px; }
.breadcrumb a { color: rgba(255,255,255,.84); }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .breadcrumb-sep { font-size: .72rem; opacity: .8; }
.breadcrumb .current { color: rgba(255,255,255,.92); }
.badge {
    display: inline-flex; align-items: center; gap: 7px;
    padding: 6px 15px;
    border-radius: 999px;
    background: rgba(230,57,70,.20);
    border: 1px solid rgba(255,183,3,.36);
    color: var(--accent);
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .04em;
    backdrop-filter: blur(8px);
}
.article-hero h1 { font-size: clamp(1.75rem, 3.4vw, 2.65rem); line-height: 1.36; margin: 20px 0 16px; font-weight: 800; max-width: 860px; text-wrap: balance; }
.article-meta { display: flex; flex-wrap: wrap; gap: 22px; font-size: .87rem; color: rgba(255,255,255,.74); }
.article-meta span { display: inline-flex; align-items: center; gap: 7px; }
.article-meta .fa { color: var(--accent); font-size: .92rem; }

.article-main { padding: 60px 0 32px; }
.grid-padding-x { margin-left: -15px; margin-right: -15px; }
.grid-padding-x > .cell { padding-left: 15px; padding-right: 15px; }
.article-content-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    padding: 40px 44px;
    box-shadow: var(--shadow-sm);
    min-height: 320px;
}
.cms-content { font-size: 1.04rem; line-height: 1.92; color: #334155; word-break: break-word; }
.cms-content h2 { font-size: 1.45rem; margin: 32px 0 16px; color: var(--secondary); font-weight: 800; padding-bottom: 10px; border-bottom: 2px solid var(--primary-light); }
.cms-content h3 { font-size: 1.18rem; margin: 26px 0 12px; color: var(--secondary); font-weight: 750; }
.cms-content p { margin-bottom: 18px; }
.cms-content ul { margin: 0 0 20px; }
.cms-content ul li {
    padding-left: 28px;
    position: relative;
    margin-bottom: 9px;
}
.cms-content ul li::before {
    content: "\f058";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: var(--primary);
    position: absolute;
    left: 0; top: 3px;
    font-size: .9em;
}
.cms-content ol { margin: 0 0 20px; padding-left: 22px; }
.cms-content ol li { margin-bottom: 8px; padding-left: 6px; }
.cms-content blockquote {
    border-left: 4px solid var(--primary);
    background: var(--primary-light);
    padding: 16px 22px;
    border-radius: 0 12px 12px 0;
    margin: 22px 0;
    color: var(--secondary);
    font-weight: 600;
    font-size: .96rem;
}
.cms-content img { border-radius: var(--radius-md); margin: 22px 0; box-shadow: var(--shadow-md); }
.cms-content a { color: var(--primary); font-weight: 600; border-bottom: 1px dashed var(--primary); }
.cms-content a:hover { color: var(--primary-dark); border-bottom-style: solid; }
.cms-content table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: .92rem; }
.cms-content th, .cms-content td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.cms-content th { background: var(--bg); color: var(--secondary); font-weight: 700; }

.article-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; padding-top: 24px; border-top: 1px solid var(--border); }
.tag {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 6px 15px;
    border-radius: 999px;
    background: #EEF2FF;
    color: #3B5BDB;
    font-size: .78rem;
    font-weight: 600;
    transition: all .22s ease;
}
.tag:hover { background: #DBE4FF; transform: translateY(-2px); }

.article-empty { text-align: center; padding: 80px 24px; }
.empty-icon {
    width: 76px; height: 76px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 2.2rem;
}
.article-empty h2 { font-size: 1.55rem; color: var(--secondary); margin-bottom: 10px; font-weight: 800; }
.article-empty p { color: var(--text-muted); margin-bottom: 24px; }

.article-sidebar { display: flex; flex-direction: column; gap: 22px; }
.sidebar-card {
    background: var(--surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow .25s;
}
.sidebar-card:hover { box-shadow: var(--shadow-md); }
.sidebar-title { font-size: 1.02rem; font-weight: 800; color: var(--secondary); margin-bottom: 16px; display: flex; align-items: center; gap: 9px; }
.sidebar-title i { color: var(--primary); width: 22px; text-align: center; }
.step-list li {
    display: flex; align-items: flex-start; gap: 13px;
    padding: 11px 0;
    border-bottom: 1px dashed var(--border);
    font-size: .90rem;
    color: #475569;
    line-height: 1.65;
}
.step-list li:last-child { border-bottom: 0; }
.step-num {
    width: 26px; height: 26px; flex-shrink: 0;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    display: inline-flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: .78rem;
    margin-top: 2px;
}
.sidebar-links li a {
    display: flex; align-items: center; justify-content: space-between;
    padding: 11px 15px;
    border-radius: 10px;
    font-size: .89rem;
    color: var(--text);
    transition: all .24s ease;
    font-weight: 550;
    border: 1px solid transparent;
    margin-bottom: 4px;
}
.sidebar-links li a:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: rgba(230,57,70,.14);
    transform: translateX(4px);
}
.sidebar-links .fa { font-size: .82rem; opacity: .6; }
.tip-callout {
    background: linear-gradient(135deg, #FFF9E8, #FFF3D0);
    border: 1px solid #F0D48A;
}
.tip-callout p { font-size: .87rem; color: #7A5A12; line-height: 1.8; margin: 0; }
.tip-callout .sidebar-title { color: #6B4E00; }

.section-space { padding: var(--section-space) 0; }
.category-nav-section { padding: 64px 0 56px; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 34px; gap: 16px; flex-wrap: wrap; }
.section-kicker {
    display: inline-flex; align-items: center; gap: 9px;
    font-size: .78rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--primary);
    margin-bottom: 8px;
}
.section-kicker::before { content: ""; width: 24px; height: 2px; background: var(--accent); border-radius: 2px; display: inline-block; }
.section-title { font-size: clamp(1.45rem, 2.6vw, 1.95rem); font-weight: 800; color: var(--secondary); line-height: 1.35; }
.section-desc { color: var(--text-muted); font-size: .94rem; margin-top: 8px; max-width: 460px; }

.cat-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: transform .30s, box-shadow .30s;
    display: flex;
    flex-direction: column;
    height: 100%;
}
.cat-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.cat-cover { height: 180px; background-size: cover; background-position: center; position: relative; display: flex; align-items: flex-end; }
.cat-cover .overlay { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(13,27,52,.02), rgba(13,27,52,.72)); }
.cat-badge {
    position: relative;
    z-index: 2;
    margin: 0 0 14px 16px;
    background: rgba(255,255,255,.94);
    color: var(--secondary);
    font-size: .72rem;
    font-weight: 800;
    padding: 5px 13px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 4px 12px rgba(0,0,0,.16);
}
.cat-body { padding: 22px 24px 24px; flex: 1; display: flex; flex-direction: column; }
.cat-body h3 { font-size: 1.14rem; font-weight: 800; color: var(--secondary); margin-bottom: 8px; }
.cat-body p { font-size: .88rem; color: var(--text-muted); line-height: 1.75; margin-bottom: 16px; flex: 1; }
.cat-link { color: var(--primary); font-weight: 700; font-size: .89rem; display: inline-flex; align-items: center; gap: 7px; transition: gap .24s ease; }
.cat-link:hover { gap: 11px; color: var(--primary-dark); }

.faq-section { padding: 64px 0 60px; background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.faq-wrap { max-width: 860px; margin: 0 auto; }
.accordion-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 14px;
    overflow: hidden;
    background: #fff;
    transition: border-color .25s, box-shadow .25s;
}
.accordion-item.active { border-color: rgba(230,57,70,.32); box-shadow: var(--shadow-sm); }
.accordion-header {
    width: 100%;
    background: transparent;
    border: none;
    padding: 18px 22px;
    text-align: left;
    font-size: .97rem;
    font-weight: 700;
    color: var(--secondary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    transition: color .25s;
}
.accordion-header:hover { color: var(--primary); }
.accordion-header .fa { transition: transform .35s; color: var(--primary); font-size: .85rem; flex-shrink: 0; }
.accordion-body { max-height: 0; overflow: hidden; transition: max-height .38s ease; }
.accordion-body-inner { padding: 0 22px 20px; font-size: .90rem; color: var(--text-muted); line-height: 1.85; }
.accordion-item.active .accordion-body { max-height: 360px; }
.accordion-item.active .accordion-header .fa { transform: rotate(180deg); }

.cta-section { padding: 70px 0; }
.cta-box {
    background: linear-gradient(118deg, var(--secondary), #23395B);
    border-radius: var(--radius-lg);
    padding: 56px 52px;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    flex-wrap: wrap;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}
.cta-box::before {
    content: "";
    position: absolute;
    width: 300px; height: 300px;
    border-radius: 50%;
    background: rgba(230,57,70,.20);
    top: -110px; right: -70px;
}
.cta-box::after {
    content: "";
    position: absolute;
    width: 140px; height: 140px;
    border-radius: 50%;
    border: 20px solid rgba(255,183,3,.12);
    bottom: -50px; left: 38%;
}
.cta-content { position: relative; z-index: 2; }
.cta-box h2 { font-size: clamp(1.4rem, 2.4vw, 2rem); font-weight: 800; margin-bottom: 10px; }
.cta-box p { color: rgba(255,255,255,.76); font-size: .95rem; max-width: 520px; }
.cta-box .btn { position: relative; z-index: 2; }

.site-footer { background: var(--secondary-dark); color: rgba(255,255,255,.68); padding: 60px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.45fr 1fr 1fr; gap: 44px; margin-bottom: 42px; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-size: 1.1rem; font-weight: 800; margin-bottom: 16px; }
.footer-brand .brand-icon { width: 36px; height: 36px; border-radius: 10px; font-size: .95rem; }
.footer-desc { font-size: .89rem; line-height: 1.85; margin-bottom: 20px; max-width: 370px; color: rgba(255,255,255,.58); }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
    width: 37px; height: 37px;
    border-radius: 50%;
    background: rgba(255,255,255,.08);
    display: inline-flex; align-items: center; justify-content: center;
    color: rgba(255,255,255,.75);
    transition: all .25s;
    font-size: .95rem;
}
.footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-3px); }
.footer-title { color: #fff; font-weight: 700; margin-bottom: 18px; font-size: .96rem; letter-spacing: .02em; }
.footer-links li, .footer-contact li { margin-bottom: 10px; }
.footer-links a { font-size: .88rem; color: rgba(255,255,255,.66); transition: color .25s, padding-left .25s; }
.footer-links a:hover { color: var(--accent); padding-left: 4px; }
.footer-contact { font-style: normal; display: grid; gap: 10px; }
.footer-contact li { display: flex; align-items: flex-start; gap: 10px; font-size: .88rem; color: rgba(255,255,255,.64); }
.footer-contact .fa { color: var(--accent); margin-top: 4px; font-size: .86rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding-top: 22px; text-align: center; font-size: .82rem; color: rgba(255,255,255,.42); }

@media (max-width: 1024px) {
    .article-layout { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 34px; }
    .category-nav-section .cat-cover { height: 170px; }
}

@media (max-width: 900px) {
    .main-nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 16px 20px;
        box-shadow: var(--shadow-lg);
        display: none;
        border-bottom: 1px solid var(--border);
        max-height: calc(100vh - 72px);
        overflow-y: auto;
    }
    .main-nav.open { display: flex; }
    .main-nav .nav-link { padding: 13px 16px; border-radius: 10px; font-size: .95rem; }
    .nav-toggle { display: inline-flex; }
    .search-box { width: 170px; }
    .header-actions { gap: 8px; }
}

@media (max-width: 768px) {
    :root { --section-space: 56px; }
    .article-hero { padding: 52px 0 46px; }
    .article-main { padding: 44px 0 20px; }
    .article-content-card { padding: 28px 24px; }
    .article-sidebar { gap: 18px; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .cta-box { padding: 42px 30px; }
    .cta-box .btn { width: 100%; }
    .section-space { padding: 50px 0; }
}

@media (max-width: 640px) {
    .container { padding: 0 18px; }
    .header-inner { gap: 10px; }
    .brand { font-size: .98rem; }
    .brand-icon { width: 34px; height: 34px; font-size: .9rem; }
    .header-actions .btn-sm { padding: 7px 14px; font-size: .78rem; }
    .search-box { display: none; }
    .article-hero h1 { font-size: 1.55rem; line-height: 1.42; }
    .article-meta { gap: 12px; font-size: .80rem; }
    .breadcrumb { font-size: .78rem; margin-bottom: 18px; }
    .article-content-card { border-radius: 16px; padding: 24px 18px; }
    .cms-content { font-size: .97rem; }
    .category-nav-section { padding: 48px 0 38px; }
    .faq-section { padding: 48px 0 44px; }
    .cta-section { padding: 48px 0; }
}

@media (max-width: 520px) {
    .header-inner .brand { font-size: .88rem; }
    .header-inner .brand-icon { width: 32px; height: 32px; }
    .header-actions .btn-sm { display: none; }
    .article-hero { padding: 42px 0 38px; }
    .badge { font-size: .72rem; padding: 5px 12px; }
    .cat-cover { height: 160px; }
    .cta-box h2 { font-size: 1.3rem; }
    .cta-box p { font-size: .88rem; }
}

/* roulang page: category2 */
:root {
            --primary: #1668e3;
            --primary-dark: #0e4fae;
            --primary-light: #eaf2ff;
            --accent: #ff6a2b;
            --accent-light: #fff2eb;
            --text: #1e2a3a;
            --text-muted: #64748b;
            --border: #e5eaf2;
            --bg: #f6f8fc;
            --card-bg: #ffffff;
            --radius: 18px;
            --radius-sm: 10px;
            --shadow: 0 10px 30px rgba(20, 40, 80, 0.08);
            --shadow-lg: 0 20px 50px rgba(20, 40, 80, 0.12);
            --space: 100px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            margin: 0;
        }

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

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

        ul,
        ol,
        p {
            margin: 0;
            padding: 0;
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border-radius: 100px;
            padding: 12px 26px;
            font-weight: 600;
            font-size: .95rem;
            line-height: 1.4;
            border: none;
            transition: all .25s ease;
            box-shadow: 0 8px 20px rgba(22, 104, 227, 0.18);
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(22, 104, 227, 0.3);
        }

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

        .btn-light:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-lg);
        }

        .btn-outline-light {
            border: 1.5px solid rgba(255, 255, 255, .75);
            color: #fff;
            background: rgba(255, 255, 255, .08);
            box-shadow: none;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .18);
            border-color: #fff;
            transform: translateY(-2px);
        }

        .btn-outline {
            border: 1.5px solid var(--border);
            color: var(--primary);
            background: #fff;
            box-shadow: none;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            background: var(--primary-light);
            transform: translateY(-2px);
        }

        .btn-white {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 24px rgba(0, 0, 0, .18);
        }

        .btn-white:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 14px 30px rgba(0, 0, 0, .22);
        }

        .btn-ghost {
            border: 1.5px solid rgba(255, 255, 255, .8);
            color: #fff;
            background: rgba(255, 255, 255, .08);
            box-shadow: none;
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, .16);
            transform: translateY(-2px);
        }

        .badge {
            display: inline-block;
            padding: 6px 14px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 100px;
            font-size: .82rem;
            font-weight: 700;
            line-height: 1.2;
        }

        .badge-light {
            background: rgba(255, 255, 255, .18);
            color: #fff;
        }

        .eyebrow {
            display: inline-block;
            padding: 6px 16px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 100px;
            font-size: .85rem;
            font-weight: 700;
            letter-spacing: .02em;
        }

        .section {
            padding: var(--space) 0;
        }

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

        .section-dark {
            background: #0b1f33;
            color: #fff;
        }

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

        .section-title {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            font-weight: 800;
            letter-spacing: -0.03em;
            margin: 16px 0 12px;
            color: var(--text);
            line-height: 1.25;
        }

        .section-desc {
            color: var(--text-muted);
            font-size: 1.05rem;
            line-height: 1.75;
        }

        .section-dark .section-title {
            color: #fff;
        }

        .section-dark .section-desc {
            color: rgba(255, 255, 255, .75);
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(228, 233, 242, .8);
        }

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

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.12rem;
            color: var(--text);
            white-space: nowrap;
            letter-spacing: -0.01em;
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            box-shadow: 0 6px 14px rgba(22, 104, 227, .25);
        }

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

        .nav-link {
            display: block;
            padding: 8px 16px;
            border-radius: 100px;
            font-weight: 500;
            font-size: .93rem;
            color: var(--text-muted);
            transition: all .25s ease;
        }

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

        .nav-link.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 6px 16px rgba(22, 104, 227, .25);
        }

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

        .search-box {
            position: relative;
            display: flex;
            align-items: center;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 100px;
            padding: 7px 10px 7px 16px;
            transition: border-color .25s, box-shadow .25s;
        }

        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(22, 104, 227, .1);
        }

        .search-box input {
            border: none;
            outline: none;
            background: transparent;
            width: 150px;
            font-size: .88rem;
            color: var(--text);
        }

        .search-box button {
            border: none;
            background: var(--primary-light);
            color: var(--primary);
            width: 30px;
            height: 30px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: .85rem;
            transition: all .25s;
        }

        .search-box button:hover {
            background: var(--primary);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border: 1px solid var(--border);
            background: #fff;
            color: var(--text);
            border-radius: 12px;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            transition: all .25s;
        }

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

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            padding: 96px 0 88px;
            background: linear-gradient(135deg, rgba(12, 42, 90, .93), rgba(22, 104, 227, .82)), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            color: #fff;
            overflow: hidden;
        }

        .page-hero::after {
            content: "";
            position: absolute;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .06);
            top: -160px;
            right: -120px;
            pointer-events: none;
        }

        .hero-breadcrumb {
            font-size: .9rem;
            color: rgba(255, 255, 255, .75);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .hero-breadcrumb a {
            color: rgba(255, 255, 255, .9);
        }

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

        .hero-breadcrumb i {
            font-size: .8rem;
        }

        .hero-title {
            font-size: clamp(2rem, 4.2vw, 3.1rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.03em;
            margin: 20px 0 18px;
            max-width: 720px;
        }

        .hero-accent {
            color: #ffb98a;
        }

        .hero-subtitle {
            font-size: 1.08rem;
            line-height: 1.8;
            max-width: 640px;
            color: rgba(255, 255, 255, .9);
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            margin-top: 34px;
            flex-wrap: wrap;
        }

        /* ===== Feature Cards ===== */
        .feature-wrap {
            display: flex;
            margin-bottom: 24px;
        }

        .feature-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 34px 28px;
            width: 100%;
            transition: all .3s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity .3s;
        }

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

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

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 20px;
            transition: transform .3s;
        }

        .feature-card:hover .feature-icon {
            transform: scale(1.08);
        }

        .feature-card h3 {
            font-size: 1.12rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .feature-card p {
            color: var(--text-muted);
            font-size: .92rem;
            line-height: 1.7;
            margin-bottom: 18px;
        }

        /* ===== Split Feature ===== */
        .split-feature {
            display: flex;
            align-items: center;
            gap: 64px;
            margin-bottom: 72px;
        }

        .split-feature:last-child {
            margin-bottom: 0;
        }

        .split-feature.reverse {
            flex-direction: row-reverse;
        }

        .split-media {
            flex: 1;
            position: relative;
        }

        .split-media .media-box {
            border-radius: 24px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border);
            position: relative;
            z-index: 1;
        }

        .split-media .media-box img {
            width: 100%;
            height: 360px;
            object-fit: cover;
        }

        .split-media::after {
            content: "";
            position: absolute;
            width: 120px;
            height: 120px;
            border-radius: 30px;
            background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
            bottom: -24px;
            right: -24px;
            z-index: 0;
        }

        .split-content {
            flex: 1;
        }

        .split-content .eyebrow {
            margin-bottom: 14px;
        }

        .split-content h2 {
            font-size: clamp(1.6rem, 2.6vw, 2.2rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.3;
            margin: 14px 0 16px;
        }

        .split-content>p {
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .feature-list {
            list-style: none;
            margin-top: 4px;
        }

        .feature-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            padding: 11px 0;
            border-bottom: 1px dashed var(--border);
            font-size: .96rem;
            line-height: 1.65;
        }

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

        .feature-list li i {
            color: var(--primary);
            background: var(--primary-light);
            width: 24px;
            height: 24px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: .75rem;
            flex-shrink: 0;
            margin-top: 3px;
        }

        /* ===== Steps ===== */
        .steps-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-item {
            position: relative;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 24px;
            transition: all .3s;
        }

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

        .step-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary-light);
            line-height: 1;
            display: block;
            margin-bottom: 18px;
        }

        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .step-item p {
            color: var(--text-muted);
            font-size: .88rem;
            line-height: 1.7;
        }

        .step-line {
            position: absolute;
            top: 56px;
            right: -24px;
            width: 24px;
            height: 2px;
            background: var(--border);
        }

        .step-item:last-child .step-line {
            display: none;
        }

        /* ===== Stats Band ===== */
        .stats-band {
            background: linear-gradient(135deg, rgba(9, 27, 61, .94), rgba(22, 104, 227, .88)), url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            border-radius: 28px;
            padding: 64px 48px;
            color: #fff;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .stat-number {
            font-size: 2.7rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 6px;
        }

        .stat-label {
            color: rgba(255, 255, 255, .82);
            font-size: .95rem;
        }

        /* ===== Article Cards ===== */
        .article-card {
            display: flex;
            align-items: center;
            gap: 18px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 18px;
            padding: 16px;
            height: 100%;
            transition: all .3s ease;
        }

        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: transparent;
        }

        .article-thumb {
            width: 140px;
            height: 100px;
            object-fit: cover;
            border-radius: 12px;
            flex-shrink: 0;
        }

        .article-body {
            min-width: 0;
        }

        .article-card h3 {
            font-size: 1.02rem;
            line-height: 1.5;
            font-weight: 700;
            margin: 10px 0 8px;
        }

        .article-card h3 a:hover {
            color: var(--primary);
        }

        .article-meta {
            font-size: .85rem;
            color: var(--text-muted);
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

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

        /* ===== FAQ Accordion ===== */
        .accordion {
            background: transparent;
            margin: 0;
        }

        .accordion-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 16px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: box-shadow .3s;
        }

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

        .accordion-title {
            background: #fff;
            border: none;
            padding: 22px 56px 22px 26px;
            font-size: 1.03rem;
            font-weight: 700;
            color: var(--text);
            position: relative;
            line-height: 1.5;
            margin: 0;
        }

        .accordion-title::before {
            content: "+";
            position: absolute;
            right: 24px;
            top: 50%;
            transform: translateY(-50%);
            width: 30px;
            height: 30px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            font-weight: 700;
            transition: all .3s;
        }

        .accordion-item.is-active .accordion-title::before {
            content: "−";
            background: var(--primary);
            color: #fff;
        }

        .accordion-item.is-active>.accordion-title {
            background: #fff;
        }

        .accordion-content {
            border-top: 1px dashed var(--border);
            padding: 18px 26px 22px;
            color: var(--text-muted);
            line-height: 1.8;
            background: #fff;
        }

        /* ===== CTA Panel ===== */
        .cta-panel {
            background: linear-gradient(135deg, #0c2b5e, var(--primary) 70%);
            border-radius: 28px;
            padding: 68px 48px;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .cta-panel::before {
            content: "";
            position: absolute;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .08);
            top: -90px;
            left: -90px;
        }

        .cta-panel::after {
            content: "";
            position: absolute;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .06);
            bottom: -70px;
            right: -60px;
        }

        .cta-title {
            font-size: clamp(1.6rem, 2.8vw, 2.3rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }

        .cta-desc {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, .85);
            max-width: 520px;
            margin: 0 auto 30px;
            position: relative;
            z-index: 1;
        }

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

        /* ===== Footer ===== */
        .site-footer {
            background: #0b1f33;
            color: rgba(255, 255, 255, .85);
            padding: 70px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 42px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-desc {
            font-size: .92rem;
            line-height: 1.75;
            color: rgba(255, 255, 255, .68);
            max-width: 360px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
            margin-top: 20px;
        }

        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: .92rem;
            transition: all .3s;
        }

        .footer-social a:hover {
            background: var(--primary);
            transform: translateY(-3px);
        }

        .footer-title {
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 18px;
        }

        .footer-links li {
            list-style: none;
            margin-bottom: 10px;
        }

        .footer-links a {
            font-size: .92rem;
            color: rgba(255, 255, 255, .68);
        }

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

        .footer-contact li {
            list-style: none;
            display: flex;
            gap: 10px;
            margin-bottom: 12px;
            font-size: .92rem;
            color: rgba(255, 255, 255, .68);
        }

        .footer-contact i {
            color: var(--primary);
            width: 18px;
            text-align: center;
            margin-top: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .12);
            padding: 20px 0;
            text-align: center;
            color: rgba(255, 255, 255, .5);
            font-size: .85rem;
        }

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

        /* ===== Responsive ===== */
        @media screen and (max-width: 1024px) {
            .main-nav {
                position: fixed;
                left: 0;
                right: 0;
                top: 74px;
                background: #fff;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                display: none;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 16px 24px 24px;
                z-index: 99;
            }

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

            .nav-link {
                padding: 12px 18px;
                border-radius: 12px;
            }

            .search-box {
                display: none;
            }

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

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

            .step-line {
                display: none;
            }

            .split-feature,
            .split-feature.reverse {
                gap: 40px;
            }
        }

        @media screen and (max-width: 768px) {
            :root {
                --space: 70px;
            }

            .grid-container {
                padding-left: 20px;
                padding-right: 20px;
            }

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

            .split-feature,
            .split-feature.reverse {
                flex-direction: column;
                gap: 32px;
            }

            .split-media .media-box img {
                height: 260px;
            }

            .stats-band {
                padding: 44px 24px;
            }

            .stat-number {
                font-size: 2rem;
            }

            .cta-panel {
                padding: 48px 24px;
            }

            .article-card {
                flex-direction: column;
                align-items: flex-start;
            }

            .article-thumb {
                width: 100%;
                height: 160px;
            }
        }

        @media screen and (max-width: 520px) {
            .header-inner {
                gap: 12px;
            }

            .brand {
                font-size: .98rem;
            }

            .brand-icon {
                width: 36px;
                height: 36px;
                font-size: .95rem;
            }

            .btn {
                padding: 10px 20px;
                font-size: .9rem;
            }

            .hero-title {
                font-size: 1.85rem;
            }

            .hero-subtitle {
                font-size: 1rem;
            }

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

            .stat-number {
                font-size: 1.7rem;
            }

            .footer-contact-wrap {
                margin-top: 8px;
            }
        }

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1e3a8a;
            --primary-light: #eff6ff;
            --accent: #f97316;
            --accent-hover: #ea580c;
            --dark-bg: #0f172a;
            --dark-card: #1e293b;
            --bg-light: #f8fafc;
            --white: #ffffff;
            --text-main: #0f172a;
            --text-body: #334155;
            --text-muted: #64748b;
            --border-light: #e2e8f0;
            --radius-lg: 18px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 10px rgba(15, 23, 42, 0.05);
            --shadow-md: 0 6px 28px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 14px 44px rgba(15, 23, 42, 0.12);
            --transition: all 0.25s ease;
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg-light);
            color: var(--text-body);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul,
        ol {
            list-style: none;
        }
        button {
            border: none;
            background: none;
            cursor: pointer;
            font: inherit;
        }
        input {
            font: inherit;
        }

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

        /* ===== 头部导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 10px rgba(15, 23, 42, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            gap: 20px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            white-space: nowrap;
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 800;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            margin-left: auto;
        }
        .nav-link {
            display: inline-block;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition);
        }
        .nav-link:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .nav-link.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: #f1f5f9;
            border-radius: 999px;
            padding: 6px 16px;
            gap: 8px;
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
        }
        .search-box input {
            border: none;
            background: transparent;
            outline: none;
            width: 140px;
            font-size: 14px;
            color: var(--text-body);
        }
        .search-box button {
            color: var(--text-muted);
            display: flex;
            align-items: center;
        }
        .search-box button:hover {
            color: var(--primary);
        }
        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 18px;
            align-items: center;
            justify-content: center;
        }
        .nav-toggle:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 22px rgba(37, 99, 235, 0.4);
        }
        .btn-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 7px 18px;
            font-size: 13px;
        }
        .btn-lg {
            padding: 14px 34px;
            font-size: 16px;
        }

        /* ===== 页面横幅 ===== */
        .page-banner {
            position: relative;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(30, 58, 138, 0.72)), url('/assets/images/backpic/back-3.png') center / cover no-repeat;
            padding: 80px 0 64px;
            text-align: center;
            color: #fff;
        }
        .page-banner .breadcrumb {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 6px 18px;
            border-radius: 999px;
            font-size: 13px;
            margin-bottom: 24px;
            backdrop-filter: blur(8px);
        }
        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
        }
        .page-banner .breadcrumb a:hover {
            color: #fff;
        }
        .page-banner .breadcrumb i {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.5);
        }
        .page-banner h1 {
            font-size: 40px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }
        .page-banner p {
            font-size: 16px;
            max-width: 660px;
            margin: 0 auto;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.8;
        }
        .page-banner .banner-tags {
            margin-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }
        .page-banner .banner-tags span {
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.18);
            padding: 4px 14px;
            border-radius: 999px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.9);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--white);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .eyebrow {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 999px;
            margin-bottom: 14px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .section-header p {
            max-width: 600px;
            margin: 0 auto;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ===== FAQ 分类卡片 ===== */
        .faq-category-section {
            padding: 80px 0 20px;
        }
        .faq-cat-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            padding: 36px 28px;
            text-align: center;
            transition: var(--transition);
            height: 100%;
            box-shadow: var(--shadow-sm);
        }
        .faq-cat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(37, 99, 235, 0.25);
        }
        .faq-cat-card .cat-icon {
            width: 64px;
            height: 64px;
            border-radius: 18px;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), #4f8dff);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.25);
        }
        .faq-cat-card:nth-child(2) .cat-icon {
            background: linear-gradient(135deg, #f97316, #fb923c);
            box-shadow: 0 6px 20px rgba(249, 115, 22, 0.25);
        }
        .faq-cat-card:nth-child(3) .cat-icon {
            background: linear-gradient(135deg, #059669, #34d399);
            box-shadow: 0 6px 20px rgba(5, 150, 105, 0.25);
        }
        .faq-cat-card:nth-child(4) .cat-icon {
            background: linear-gradient(135deg, #7c3aed, #a78bfa);
            box-shadow: 0 6px 20px rgba(124, 58, 237, 0.25);
        }
        .faq-cat-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .faq-cat-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }
        .faq-cat-card .cat-count {
            display: inline-block;
            margin-top: 12px;
            font-size: 12px;
            background: var(--bg-light);
            color: var(--text-muted);
            padding: 2px 12px;
            border-radius: 999px;
        }

        /* ===== FAQ 手风琴 ===== */
        .faq-main-section {
            padding: 40px 0 80px;
        }
        .faq-group {
            margin-bottom: 44px;
        }
        .faq-group:last-child {
            margin-bottom: 0;
        }
        .faq-group-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 20px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary-light);
        }
        .faq-group-title i {
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
        }
        .faq-accordion {
            background: transparent !important;
            border: none !important;
        }
        .faq-accordion .accordion-item {
            background: var(--white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-accordion .accordion-item:hover {
            border-color: rgba(37, 99, 235, 0.3);
            box-shadow: var(--shadow-sm);
        }
        .faq-accordion .accordion-item.is-active {
            border-color: rgba(37, 99, 235, 0.35);
            box-shadow: var(--shadow-md);
        }
        .faq-accordion .accordion-title {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 22px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            background: transparent;
            border: none;
            line-height: 1.4;
            transition: var(--transition);
        }
        .faq-accordion .accordion-title:hover {
            background: var(--bg-light);
        }
        .faq-accordion .accordion-title:focus {
            outline: 2px solid var(--primary);
            outline-offset: -2px;
        }
        .faq-accordion .q-badge {
            flex-shrink: 0;
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
        }
        .faq-accordion .q-title {
            flex: 1;
        }
        .faq-accordion .q-icon {
            color: var(--text-muted);
            font-size: 13px;
            transition: var(--transition);
        }
        .faq-accordion .accordion-item.is-active .q-icon {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-accordion .accordion-content {
            padding: 0 22px 22px 66px;
            background: var(--white);
            border: none;
            color: var(--text-body);
            font-size: 14px;
            line-height: 1.8;
        }
        .faq-accordion .accordion-content p {
            color: var(--text-body);
            font-size: 14px;
            line-height: 1.8;
        }

        /* ===== 快速排障步骤 ===== */
        .steps-section {
            padding: 80px 0;
            background: var(--dark-bg);
            background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(30, 41, 59, 0.9));
            position: relative;
            overflow: hidden;
        }
        .steps-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(37, 99, 235, 0.15);
        }
        .steps-section .section-header h2 {
            color: #fff;
        }
        .steps-section .section-header p {
            color: rgba(255, 255, 255, 0.65);
        }
        .steps-section .section-header .eyebrow {
            background: rgba(37, 99, 235, 0.3);
            color: #93c5fd;
        }
        .step-card {
            text-align: center;
            padding: 36px 24px;
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(8px);
            height: 100%;
            transition: var(--transition);
        }
        .step-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
            border-color: rgba(37, 99, 235, 0.4);
        }
        .step-num {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary), #4f8dff);
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
        }
        .step-card h3 {
            color: #fff;
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .step-card p {
            color: rgba(255, 255, 255, 0.65);
            font-size: 13px;
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== 评分与反馈 ===== */
        .feedback-section {
            padding: 80px 0;
            background: var(--white);
        }
        .rating-panel {
            background: var(--bg-light);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            height: 100%;
        }
        .rating-panel h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
        }
        .rating-panel .rating-sub {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 28px;
        }
        .rating-row {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
            gap: 16px;
        }
        .rating-row:last-child {
            margin-bottom: 0;
        }
        .rating-label {
            width: 110px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            flex-shrink: 0;
        }
        .rating-track {
            flex: 1;
            height: 8px;
            border-radius: 4px;
            background: #e8edf2;
            overflow: hidden;
        }
        .rating-fill {
            height: 100%;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--primary), #4f8dff);
            width: 0;
            transition: width 1s ease;
        }
        .rating-value {
            font-size: 14px;
            font-weight: 700;
            color: var(--primary);
            width: 36px;
            text-align: right;
            flex-shrink: 0;
        }
        .testimonial-card {
            background: var(--bg-light);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .testimonial-card .quote-icon {
            font-size: 28px;
            color: var(--primary);
            opacity: 0.3;
            margin-bottom: 12px;
        }
        .testimonial-card .testi-text {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.75;
            flex: 1;
        }
        .testimonial-card .testi-user {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 20px;
            padding-top: 16px;
            border-top: 1px solid var(--border-light);
        }
        .testimonial-card .testi-user img {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            object-fit: cover;
            border: 2px solid var(--primary-light);
        }
        .testimonial-card .testi-user .testi-name {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
        }
        .testimonial-card .testi-user .testi-role {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88), rgba(30, 58, 138, 0.78)), url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            text-align: center;
            color: #fff;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: 1px;
        }
        .cta-section p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-info-row {
            display: flex;
            justify-content: center;
            gap: 28px;
            margin-top: 36px;
            flex-wrap: wrap;
        }
        .cta-info-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
        }
        .cta-info-item i {
            color: #93c5fd;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark-bg);
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.8fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 20px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.7);
            font-size: 16px;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            margin-bottom: 12px;
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-contact i {
            color: var(--primary);
            width: 18px;
            text-align: center;
        }
        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 响应式 ===== */
        @media (min-width: 640px) and (max-width: 1024px) {
            .page-banner {
                padding: 60px 0 48px;
            }
            .page-banner h1 {
                font-size: 32px;
            }
            .section {
                padding: 60px 0;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
            .search-box {
                display: none;
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
            }
            .main-nav {
                display: none;
                width: 100%;
                flex-direction: column;
                gap: 4px;
                padding: 12px 0 4px;
                border-top: 1px solid var(--border-light);
            }
            .main-nav.nav-open {
                display: flex;
            }
            .nav-link {
                width: 100%;
                text-align: center;
                padding: 12px 16px;
            }
            .nav-toggle {
                display: flex;
            }
            .search-box {
                display: none;
            }
            .page-banner {
                padding: 48px 0 40px;
            }
            .page-banner h1 {
                font-size: 26px;
            }
            .page-banner p {
                font-size: 14px;
            }
            .section {
                padding: 48px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .faq-accordion .accordion-title {
                padding: 14px 16px;
                font-size: 14px;
                flex-wrap: wrap;
            }
            .faq-accordion .accordion-content {
                padding: 0 16px 16px 60px;
            }
            .faq-group-title {
                font-size: 18px;
            }
            .step-card {
                margin-bottom: 20px;
            }
            .rating-panel {
                padding: 28px 20px;
                margin-bottom: 24px;
            }
            .testimonial-card {
                margin-bottom: 20px;
            }
            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-btns {
                flex-direction: column;
                align-items: center;
                gap: 12px;
            }
            .cta-btns .btn {
                width: 100%;
                max-width: 280px;
            }
            .cta-info-row {
                flex-direction: column;
                gap: 12px;
                align-items: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .brand {
                font-size: 15px;
            }
            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .page-banner h1 {
                font-size: 22px;
            }
            .page-banner .banner-tags span {
                font-size: 12px;
                padding: 3px 10px;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .section-header p {
                font-size: 13px;
            }
            .faq-accordion .accordion-content {
                padding: 0 14px 14px 14px;
            }
            .faq-accordion .q-badge {
                width: 26px;
                height: 26px;
                font-size: 11px;
            }
            .faq-accordion .accordion-title {
                padding: 12px 14px;
                gap: 10px;
            }
            .btn-lg {
                padding: 12px 26px;
                font-size: 15px;
            }
            .footer-bottom p {
                font-size: 12px;
            }
        }