/* roulang page: index */
:root {
            --primary: #1E6FD9;
            --primary-dark: #175BB5;
            --navy: #0F2A5C;
            --surface: #F4F9FD;
            --accent: #F59E0B;
            --success: #10B981;
            --ink: #16283B;
            --body: #3C4A5A;
            --muted: #7B8A99;
            --line: #E4ECF3;
            --divider: #E9EFF5;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 2px 12px rgba(15, 42, 92, 0.08);
            --shadow-hover: 0 8px 24px rgba(15, 42, 92, 0.12);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            color: var(--body);
            background: #ffffff;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        input {
            font-family: inherit;
        }

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

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            border: 1px solid transparent;
            transition: all 0.25s ease;
            white-space: nowrap;
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
        }

        .btn-primary:active {
            background: #104E9E;
            transform: translateY(1px);
        }

        .btn-outline {
            background: #fff;
            border-color: #D6E2EF;
            color: var(--primary);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            background: #F0F6FD;
        }

        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
            border-radius: 10px;
        }

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

        .btn-light:hover {
            background: #E8F1FA;
        }

        .btn-outline-light {
            background: transparent;
            border-color: rgba(255, 255, 255, 0.65);
            color: #fff;
        }

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

        .btn:focus-visible {
            outline: 3px solid rgba(30, 111, 217, 0.35);
            outline-offset: 2px;
        }

        /* ===== 导航 ===== */
        #site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: #fff;
            border-bottom: 1px solid var(--divider);
            transition: box-shadow 0.3s ease, background 0.3s ease;
        }

        #site-header.scrolled {
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 4px 20px rgba(15, 42, 92, 0.08);
        }

        .header-brand-row {
            border-bottom: 1px solid var(--divider);
        }

        .brand-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 60px;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, #1E6FD9, #3E9BFF);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 17px;
            flex-shrink: 0;
        }

        .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--navy);
            letter-spacing: 0.01em;
            white-space: nowrap;
        }

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

        .header-nav-row {
            background: #fff;
        }

        .nav-bar {
            display: flex;
            align-items: center;
            gap: 28px;
            height: 50px;
        }

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

        .nav-link {
            position: relative;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--body);
            border-radius: var(--radius-sm);
            transition: color 0.2s ease, background 0.2s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--primary);
            background: #F0F6FD;
        }

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

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

        .nav-search {
            display: flex;
            align-items: center;
            margin-left: auto;
            position: relative;
        }

        .nav-search input {
            width: 220px;
            height: 36px;
            border: 1px solid #D6E2EF;
            border-radius: var(--radius-sm);
            padding: 0 36px 0 14px;
            font-size: 13px;
            color: var(--body);
            background: var(--surface);
            transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
        }

        .nav-search input::placeholder {
            color: #A6B4C0;
        }

        .nav-search input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(30, 111, 217, 0.15);
            background: #fff;
        }

        .nav-search button {
            position: absolute;
            right: 6px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--muted);
            font-size: 14px;
            padding: 4px 6px;
            transition: color 0.2s;
        }

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

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

        .trend-tag {
            display: inline-block;
            padding: 4px 10px;
            font-size: 12px;
            border-radius: 999px;
            background: #F0F6FD;
            color: var(--body);
            border: 1px solid var(--line);
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .trend-tag:hover {
            color: var(--primary);
            border-color: var(--primary);
            background: #fff;
        }

        .mobile-menu-btn {
            display: none;
            width: 38px;
            height: 38px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            border: 1px solid #D6E2EF;
            color: var(--navy);
            font-size: 18px;
            background: #fff;
            transition: all 0.2s;
        }

        .mobile-menu-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            background: linear-gradient(135deg, #E8F1FA 0%, #F4F9FD 45%, #ffffff 100%);
            padding: 72px 0 80px;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            pointer-events: none;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 140px;
            background-image: radial-gradient(circle at 25% 75%, rgba(225, 237, 250, 0.6) 0 6px, transparent 7px),
                radial-gradient(circle at 60% 55%, rgba(225, 237, 250, 0.4) 0 4px, transparent 5px);
            background-size: 36px 36px, 24px 24px;
            opacity: 0.5;
            pointer-events: none;
        }

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

        .hero-grid {
            display: flex;
            align-items: center;
            gap: 56px;
        }

        .hero-text {
            flex: 0 0 58%;
            max-width: 58%;
        }

        .hero-image {
            flex: 1;
        }

        .hero-image img {
            width: 100%;
            border-radius: 16px;
            box-shadow: var(--shadow);
        }

        .hero h1 {
            font-size: 38px;
            line-height: 1.3;
            color: var(--ink);
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }

        .hero-subtitle {
            font-size: 17px;
            color: var(--body);
            line-height: 1.75;
            margin-bottom: 28px;
            max-width: 540px;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }

        .hero-note {
            margin-top: 18px;
            font-size: 12px;
            color: var(--muted);
        }

        /* ===== 痛点区 ===== */
        .pain-points {
            padding: 96px 0;
            background: #fff;
        }

        .pain-grid {
            display: flex;
            gap: 64px;
            align-items: flex-start;
        }

        .pain-left {
            flex: 0 0 40%;
        }

        .pain-left h2 {
            font-size: 30px;
            line-height: 1.4;
            color: var(--ink);
            margin-bottom: 16px;
            font-weight: 700;
        }

        .pain-left p {
            color: var(--muted);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .pain-right {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .pain-card {
            display: flex;
            gap: 16px;
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 22px 24px;
            transition: all 0.25s ease;
        }

        .pain-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow);
            transform: translateX(4px);
        }

        .pain-icon {
            width: 42px;
            height: 42px;
            flex-shrink: 0;
            border-radius: 10px;
            background: #fff;
            border: 1px solid var(--line);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
        }

        .pain-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 6px;
        }

        .pain-card p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== 解决方案区 ===== */
        .solutions {
            background: var(--surface);
            padding: 96px 0;
        }

        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
        }

        .section-head h2 {
            font-size: 30px;
            color: var(--ink);
            font-weight: 700;
            margin-bottom: 12px;
        }

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

        .solution-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .solution-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 28px 24px;
            transition: all 0.25s ease;
        }

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

        .solution-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: #EAF2FA;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 18px;
        }

        .solution-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 10px;
        }

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

        /* ===== 图文展示 ===== */
        .feature-split {
            padding: 96px 0;
            background: #fff;
        }

        .feature-grid {
            display: flex;
            align-items: center;
            gap: 64px;
        }

        .feature-image {
            flex: 0 0 48%;
        }

        .feature-image img {
            width: 100%;
            border-radius: 16px;
            box-shadow: var(--shadow);
        }

        .feature-content {
            flex: 1;
        }

        .feature-content h2 {
            font-size: 30px;
            color: var(--ink);
            font-weight: 700;
            margin-bottom: 16px;
            line-height: 1.4;
        }

        .feature-content>p {
            color: var(--muted);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .feature-list {
            list-style: none;
            margin-bottom: 28px;
        }

        .feature-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 8px 0;
            font-size: 15px;
            color: var(--body);
        }

        .feature-list li i {
            color: var(--primary);
            font-size: 17px;
            width: 20px;
            text-align: center;
        }

        /* ===== 数据区 ===== */
        .stats {
            background: var(--navy);
            padding: 64px 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }

        .stat-item {
            text-align: center;
            padding: 24px 16px 12px;
            border-top: 2px solid rgba(255, 255, 255, 0.22);
        }

        .stat-number {
            font-size: 42px;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.72);
        }

        /* ===== 证言区 ===== */
        .testimonials {
            background: var(--surface);
            padding: 96px 0;
        }

        .testimonials>div>h2 {
            text-align: center;
            font-size: 30px;
            color: var(--ink);
            font-weight: 700;
            margin-bottom: 48px;
        }

        .testimonial-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 24px;
        }

        .testimonial-main {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 36px;
            box-shadow: var(--shadow);
        }

        .quote-mark {
            font-size: 56px;
            font-family: Georgia, serif;
            color: var(--primary);
            line-height: 0.8;
            margin-bottom: 16px;
            opacity: 0.35;
        }

        .testimonial-main p {
            font-size: 16px;
            color: var(--body);
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .testimonial-author {
            font-size: 13px;
            color: var(--muted);
        }

        .testimonial-side {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .testimonial-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 22px 24px;
            flex: 1;
            transition: all 0.25s ease;
        }

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

        .testimonial-card p {
            font-size: 14px;
            color: var(--body);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        /* ===== 资讯区 ===== */
        .news {
            padding: 96px 0;
            background: #fff;
        }

        .news-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 40px;
            gap: 20px;
        }

        .news-header h2 {
            font-size: 30px;
            color: var(--ink);
            font-weight: 700;
        }

        .more-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--primary);
            font-weight: 500;
            transition: gap 0.2s ease;
        }

        .more-link:hover {
            gap: 10px;
        }

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

        .news-card {
            display: block;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 24px;
            transition: all 0.25s ease;
            border-left: 4px solid transparent;
        }

        .news-card:hover {
            border-color: var(--primary);
            border-left-color: var(--primary);
            box-shadow: var(--shadow);
            transform: translateY(-3px);
        }

        .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 12px;
            gap: 12px;
        }

        .news-badge {
            display: inline-block;
            padding: 3px 10px;
            font-size: 12px;
            border-radius: 999px;
            background: #EAF2FA;
            color: var(--primary);
            font-weight: 500;
            white-space: nowrap;
        }

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

        .news-card h3 {
            font-size: 16px;
            color: var(--ink);
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card>p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.75;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
        }

        .read-more {
            font-size: 13px;
            color: var(--primary);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            background: var(--surface);
            border: 1px dashed #D6E2EF;
            border-radius: var(--radius);
            color: var(--muted);
            font-size: 14px;
        }

        /* ===== FAQ ===== */
        .faq {
            background: var(--surface);
            padding: 96px 0;
        }

        .faq-grid {
            display: grid;
            grid-template-columns: 0.8fr 1.2fr;
            gap: 56px;
            align-items: start;
        }

        .faq-left h2 {
            font-size: 30px;
            color: var(--ink);
            font-weight: 700;
            margin-bottom: 16px;
        }

        .faq-left p {
            color: var(--muted);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 12px;
        }

        .faq-right {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color 0.2s;
        }

        .faq-item.active {
            border-color: var(--primary);
        }

        .faq-question {
            display: flex;
            align-items: center;
            gap: 12px;
            width: 100%;
            padding: 18px 20px;
            text-align: left;
            font-size: 15px;
            font-weight: 600;
            color: var(--ink);
            transition: color 0.2s;
            background: #fff;
        }

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

        .faq-icon {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            border-radius: 50%;
            background: #EAF2FA;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 500;
            transition: transform 0.25s ease, background 0.25s, color 0.25s;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            background: #F8FBFE;
        }

        .faq-item.active .faq-answer {
            max-height: 320px;
            border-left: 3px solid var(--primary);
        }

        .faq-answer p {
            padding: 20px;
            font-size: 14px;
            color: var(--body);
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta {
            background: var(--navy);
            padding: 96px 0;
            position: relative;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
        }

        .cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 42, 92, 0.88);
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: 32px;
            color: #fff;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .cta-inner>p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

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

        .cta-note {
            margin-top: 24px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.6);
        }

        /* ===== 页脚 ===== */
        footer {
            background: var(--navy);
            padding-top: 64px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        }

        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.62);
            line-height: 1.8;
            max-width: 300px;
        }

        .footer-links h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }

        .footer-links a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.62);
            padding: 5px 0;
            transition: color 0.2s;
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-bottom {
            padding: 24px 0;
            background: rgba(0, 0, 0, 0.16);
        }

        .footer-bottom .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

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

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .mobile-menu-btn {
                display: inline-flex;
            }

            .header-nav-row {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--divider);
                box-shadow: 0 12px 24px rgba(15, 42, 92, 0.08);
                max-height: 80vh;
                overflow-y: auto;
            }

            .header-nav-row.open {
                display: block;
            }

            .nav-bar {
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 16px 24px;
                height: auto;
            }

            .main-nav {
                flex-direction: column;
                align-items: stretch;
                gap: 2px;
            }

            .nav-link {
                padding: 12px 14px;
                border-radius: var(--radius-sm);
                font-size: 15px;
            }

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

            .nav-link.active {
                background: #F0F6FD;
            }

            .nav-search {
                margin-left: 0;
                margin-top: 10px;
            }

            .nav-search input {
                width: 100%;
            }

            .nav-trends {
                margin-top: 10px;
                flex-wrap: wrap;
            }

            .hero-grid {
                flex-direction: column;
                gap: 40px;
            }

            .hero-text,
            .hero-image {
                flex: none;
                max-width: 100%;
                width: 100%;
            }

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

            .pain-grid {
                flex-direction: column;
                gap: 40px;
            }

            .pain-left {
                flex: none;
                width: 100%;
            }

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

            .feature-grid {
                flex-direction: column;
                gap: 40px;
            }

            .feature-image {
                flex: none;
                width: 100%;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

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

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

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

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

        @media (max-width: 768px) {
            .hero {
                padding: 48px 0 56px;
            }

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

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

            .pain-points,
            .solutions,
            .feature-split,
            .testimonials,
            .news,
            .faq,
            .cta {
                padding: 64px 0;
            }

            .section-head h2,
            .pain-left h2,
            .feature-content h2,
            .news-header h2,
            .faq-left h2,
            .testimonials>div>h2 {
                font-size: 26px;
            }

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

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

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

            .news-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

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

            .brand-actions .btn-outline,
            .brand-actions .btn-primary {
                padding: 8px 14px;
                font-size: 14px;
            }

            .brand-name {
                font-size: 17px;
            }

            .hero-actions .btn-lg {
                padding: 12px 22px;
                font-size: 15px;
            }

            .hero-actions {
                gap: 10px;
            }

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

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .cta-actions {
                flex-direction: column;
                align-items: center;
                gap: 12px;
            }

            .cta-actions .btn {
                width: 100%;
                max-width: 320px;
            }
        }

/* roulang page: category1 */
:root {
  --primary: #1E6FD9;
  --primary-dark: #175BB5;
  --dark: #0F2A5C;
  --surface: #F4F9FD;
  --accent: #F59E0B;
  --success: #10B981;
  --heading: #16283B;
  --text: #3C4A5A;
  --muted: #7B8A99;
  --border: #E4ECF3;
  --divider: #E9EFF5;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 12px rgba(15, 42, 92, 0.08);
  --shadow-hover: 0 8px 24px rgba(15, 42, 92, 0.12);
  --transition: 0.25s ease;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  background: #fff;
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color var(--transition); }
button { font-family: inherit; cursor: pointer; background: none; border: none; }
input { font-family: inherit; outline: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid var(--divider);
}
.header-top {
  background: #fff;
  border-bottom: 1px solid rgba(228, 236, 243, 0.6);
}
.header-top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}
.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #1E6FD9 0%, #3B8BEC 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  flex-shrink: 0;
}
.brand-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--heading);
  letter-spacing: 0.02em;
}
.brand-sub {
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: block;
  line-height: 1;
  margin-top: 2px;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  padding: 9px 20px;
  transition: all var(--transition);
  border: 1px solid transparent;
  line-height: 1.4;
}
.btn-sm { font-size: 13px; padding: 7px 16px; }
.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); }
.btn-primary:active { background: #104A94; transform: translateY(1px); }
.btn-ghost {
  background: #fff;
  color: var(--primary);
  border-color: #D6E2EF;
}
.btn-ghost:hover { border-color: var(--primary); background: #F0F6FD; }
.btn-ghost:active { transform: translateY(1px); }
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 9px 8px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  align-items: center;
  justify-content: center;
}
.menu-toggle span {
  width: 20px;
  height: 2px;
  background: var(--heading);
  border-radius: 2px;
  transition: all 0.3s;
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.header-bottom {
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--divider);
  transition: all var(--transition);
}
.header-bottom-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 56px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: nowrap;
}
.nav-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  position: relative;
  white-space: nowrap;
}
.nav-link:hover { color: var(--primary); background: var(--surface); }
.nav-link.active { color: var(--primary); font-weight: 600; }
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.nav-search {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  max-width: 300px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 7px 14px;
  transition: all var(--transition);
}
.nav-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30, 111, 217, 0.12);
  background: #fff;
}
.nav-search svg { width: 16px; height: 16px; color: var(--muted); flex-shrink: 0; }
.nav-search input {
  border: none;
  background: transparent;
  font-size: 13px;
  color: var(--heading);
  width: 100%;
}
.nav-search input::placeholder { color: var(--muted); }
.nav-hot {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-left: auto;
}
.hot-tag {
  font-size: 12px;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px 14px;
  transition: all var(--transition);
  white-space: nowrap;
}
.hot-tag:hover { color: var(--primary); border-color: var(--primary); background: #F0F6FD; }

/* ===== Page Hero ===== */
.page-hero {
  background: linear-gradient(135deg, #EAF2FA 0%, #F4F9FD 50%, #E5EFFA 100%);
  position: relative;
  overflow: hidden;
  padding: 72px 0 64px;
  border-bottom: 1px solid var(--border);
}
.page-hero::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(30, 111, 217, 0.08) 0%, transparent 70%);
}
.page-hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 6" preserveAspectRatio="none"><path d="M0 3 Q 150 6 300 3 T 600 3 T 900 3 T 1200 3" fill="none" stroke="%23E1EDFA" stroke-width="2" opacity="0.6"/></svg>') repeat-x;
  background-size: 400px 6px;
}
.page-hero-inner {
  display: flex;
  align-items: center;
  gap: 48px;
  position: relative;
  z-index: 2;
}
.page-hero-copy { flex: 0 0 58%; }
.page-hero-copy .page-crumb {
  font-size: 13px;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 16px;
}
.page-hero-copy .page-crumb a:hover { color: var(--primary); }
.page-hero-copy .page-crumb .crumb-sep { color: var(--border); }
.page-hero h1 {
  font-size: 38px;
  font-weight: 700;
  color: var(--heading);
  line-height: 1.3;
  margin-bottom: 16px;
}
.page-hero-copy .hero-desc {
  font-size: 17px;
  color: var(--text);
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 560px;
}
.page-hero-btns { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.page-hero-note {
  font-size: 12px;
  color: var(--muted);
  margin-top: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.page-hero-visual {
  flex: 0 0 42%;
  border-radius: 16px;
  overflow: hidden;
  min-height: 280px;
  background-size: cover;
  background-position: center;
  position: relative;
  box-shadow: var(--shadow);
}
.page-hero-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 42, 92, 0.05) 0%, rgba(15, 42, 92, 0.15) 100%);
}
.page-hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: relative;
  z-index: 1;
}

/* ===== Section base ===== */
.section { padding: 88px 0; }
.section-alt { background: var(--surface); }
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: #EAF2FA;
  border: 1px solid #D6E6F5;
  padding: 4px 16px;
  border-radius: 20px;
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}
.section-header h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--heading);
  line-height: 1.35;
  margin-bottom: 14px;
}
.section-header p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.7;
}

/* ===== Guide Cards (交错式) ===== */
.guide-list { display: flex; flex-direction: column; gap: 48px; }
.guide-card {
  display: flex;
  align-items: center;
  gap: 48px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition);
}
.guide-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.guide-card:nth-child(even) { flex-direction: row-reverse; }
.guide-img {
  flex: 0 0 42%;
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 4/3;
  background: #EAF2FA;
}
.guide-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.guide-content { flex: 1; }
.guide-badge {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: #FFF7E6;
  border: 1px solid #FDE68A;
  padding: 3px 12px;
  border-radius: 20px;
  margin-bottom: 14px;
}
.guide-content h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--heading);
  line-height: 1.4;
  margin-bottom: 12px;
}
.guide-content p {
  font-size: 15px;
  color: var(--text);
  line-height: 1.75;
  margin-bottom: 16px;
}
.guide-tip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--primary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 14px;
}
.guide-tip svg { width: 14px; height: 14px; }

/* ===== Step Flow ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.step-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  position: relative;
  transition: all var(--transition);
}
.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: #C8DCF0;
}
.step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1E6FD9, #3B8BEC);
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.step-icon {
  font-size: 28px;
  margin-bottom: 12px;
}
.step-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--heading);
  margin-bottom: 8px;
  line-height: 1.4;
}
.step-card p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
}
.step-arrow {
  position: absolute;
  top: 50%;
  right: -16px;
  transform: translateY(-50%);
  color: #C8DCF0;
  z-index: 2;
  font-size: 18px;
}
.step-card:last-child .step-arrow { display: none; }

/* ===== Prep List ===== */
.prep-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.prep-item {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 28px 24px;
  transition: all var(--transition);
}
.prep-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
}
.prep-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: #EAF2FA;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 16px;
}
.prep-icon svg { width: 20px; height: 20px; }
.prep-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--heading);
  margin-bottom: 8px;
}
.prep-item p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.65;
}

/* ===== FAQ ===== */
.faq-layout {
  display: flex;
  gap: 56px;
}
.faq-intro { flex: 0 0 32%; }
.faq-intro h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--heading);
  line-height: 1.35;
  margin-bottom: 16px;
}
.faq-intro p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.75;
}
.faq-list { flex: 1; }
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item.open {
  border-color: var(--primary);
  box-shadow: 0 4px 16px rgba(30, 111, 217, 0.08);
}
.faq-question {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 24px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--heading);
  transition: color var(--transition);
  width: 100%;
  text-align: left;
}
.faq-item.open .faq-question { color: var(--primary); }
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--muted);
  flex-shrink: 0;
  transition: all 0.3s ease;
  font-style: normal;
}
.faq-item.open .faq-icon {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  background: #F8FBFE;
}
.faq-answer-inner {
  padding: 4px 24px 20px 62px;
  font-size: 14px;
  color: var(--text);
  line-height: 1.75;
  border-left: 3px solid var(--primary);
  margin-left: 24px;
}
.faq-item.open .faq-answer { max-height: 500px; }

/* ===== CTA ===== */
.cta-section {
  background: var(--dark);
  padding: 88px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 139, 236, 0.2) 0%, transparent 70%);
  top: -100px;
  right: -100px;
}
.cta-section::after {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.12) 0%, transparent 70%);
  bottom: -80px;
  left: -80px;
}
.cta-inner {
  text-align: center;
  position: relative;
  z-index: 2;
}
.cta-inner h2 {
  color: #fff;
  font-size: 34px;
  font-weight: 700;
  margin-bottom: 16px;
}
.cta-inner p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 16px;
  margin-bottom: 32px;
}
.cta-btns { display: flex; gap: 16px; justify-content: center; align-items: center; flex-wrap: wrap; }
.cta-btns .btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  font-size: 15px;
  padding: 12px 32px;
}
.cta-btns .btn-primary:hover { background: #2A7DE0; }
.cta-btns .btn-ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.3);
  color: #fff;
  font-size: 15px;
  padding: 12px 32px;
}
.cta-btns .btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, 0.1); }
.cta-notes {
  margin-top: 20px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

/* ===== Footer ===== */
footer {
  background: var(--dark);
  padding-top: 64px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-logo {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.75;
  max-width: 300px;
}
.footer-links h4 {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-links a {
  display: block;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  padding: 5px 0;
  transition: color var(--transition);
}
.footer-links a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
}
.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.footer-bottom p {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .menu-toggle { display: flex; }
  .header-bottom {
    position: fixed;
    top: 62px;
    left: 0;
    right: 0;
    transform: translateY(-120%);
    transition: transform 0.35s ease;
    box-shadow: 0 8px 24px rgba(15, 42, 92, 0.1);
  }
  .header-bottom.open { transform: translateY(0); }
  .header-bottom-inner {
    flex-direction: column;
    height: auto;
    padding: 20px 24px;
    align-items: stretch;
    gap: 16px;
  }
  .main-nav { flex-direction: column; gap: 4px; align-items: stretch; }
  .nav-link { text-align: center; padding: 12px; }
  .nav-link.active::after { display: none; }
  .nav-link.active { background: var(--surface); }
  .nav-search { max-width: none; }
  .nav-hot { margin-left: 0; justify-content: center; flex-wrap: wrap; }
  .page-hero-inner { flex-direction: column; gap: 32px; }
  .page-hero-copy { flex: 1; }
  .page-hero-visual { width: 100%; }
  .page-hero h1 { font-size: 32px; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .step-arrow { display: none; }
  .prep-grid { grid-template-columns: repeat(2, 1fr); }
  .faq-layout { flex-direction: column; gap: 32px; }
  .faq-intro { flex: 1; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .guide-card, .guide-card:nth-child(even) { flex-direction: column; gap: 24px; padding: 24px; }
  .guide-img { flex: 1; width: 100%; }
  .section-header h2 { font-size: 26px; }
  .cta-inner h2 { font-size: 28px; }
}

@media (max-width: 520px) {
  .steps-grid { grid-template-columns: 1fr; }
  .prep-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .brand-sub { display: none; }
  .brand-text { font-size: 17px; }
  .btn-sm { padding: 6px 12px; font-size: 12px; }
  .page-hero { padding: 48px 0; }
  .page-hero h1 { font-size: 28px; }
  .page-hero-copy .hero-desc { font-size: 15px; }
  .header-actions .btn-ghost { display: none; }
  .footer-bottom .container { flex-direction: column; text-align: center; }
}

/* roulang page: article */
:root {
        --primary: #1E6FD9;
        --primary-dark: #175BB5;
        --primary-light: #F0F6FD;
        --dark: #0F2A5C;
        --surface: #F4F9FD;
        --white: #FFFFFF;
        --accent: #F59E0B;
        --success: #10B981;
        --text-heading: #16283B;
        --text-body: #3C4A5A;
        --text-secondary: #7B8A99;
        --text-disabled: #B8C4CE;
        --border: #E4ECF3;
        --divider: #E9EFF5;
        --radius-sm: 8px;
        --radius-md: 12px;
        --radius-lg: 16px;
        --shadow-sm: 0 2px 12px rgba(15, 42, 92, 0.08);
        --shadow-hover: 0 8px 24px rgba(15, 42, 92, 0.12);
        --font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: var(--font-family);
        background: var(--white);
        color: var(--text-body);
        line-height: 1.75;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }

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

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

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

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

    @media (max-width: 768px) {
        .container {
            padding: 0 16px;
        }
    }

    ::selection {
        background: rgba(30, 111, 217, .15);
        color: var(--dark);
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 10px 22px;
        border-radius: var(--radius-sm);
        font-size: 15px;
        font-weight: 500;
        line-height: 1.4;
        border: 1px solid transparent;
        cursor: pointer;
        white-space: nowrap;
        transition: all .25s ease;
    }

    .btn-primary {
        background: var(--primary);
        color: #fff;
    }
    .btn-primary:hover {
        background: var(--primary-dark);
        transform: translateY(-1px);
        box-shadow: 0 4px 14px rgba(30, 111, 217, .25);
    }
    .btn-primary:active {
        background: #124A91;
        transform: translateY(1px);
        box-shadow: none;
    }
    .btn-primary:focus-visible {
        outline: 3px solid rgba(30, 111, 217, .3);
        outline-offset: 2px;
    }

    .btn-outline {
        background: transparent;
        color: var(--primary);
        border-color: #D6E2EF;
    }
    .btn-outline:hover {
        border-color: var(--primary);
        background: var(--primary-light);
        transform: translateY(-1px);
    }
    .btn-outline:active {
        transform: translateY(1px);
        background: #E0EDFB;
    }
    .btn-outline:focus-visible {
        outline: 3px solid rgba(30, 111, 217, .2);
        outline-offset: 2px;
    }

    .btn-sm {
        padding: 8px 16px;
        font-size: 14px;
    }

    .btn-light {
        background: #fff;
        color: var(--dark);
    }
    .btn-light:hover {
        background: #E8F1FA;
        transform: translateY(-1px);
        box-shadow: 0 4px 14px rgba(0, 0, 0, .15);
    }
    .btn-light:active {
        transform: translateY(1px);
    }

    .btn-outline-light {
        background: transparent;
        color: #fff;
        border-color: rgba(255, 255, 255, .4);
    }
    .btn-outline-light:hover {
        border-color: #fff;
        background: rgba(255, 255, 255, .1);
        transform: translateY(-1px);
    }
    .btn-outline-light:active {
        transform: translateY(1px);
    }

    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: #fff;
        border-bottom: 1px solid var(--divider);
        transition: box-shadow .3s ease, background .3s ease;
    }

    .site-header.scrolled {
        background: rgba(255, 255, 255, .94);
        box-shadow: 0 4px 20px rgba(15, 42, 92, .06);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
    }

    .top-bar {
        border-bottom: 1px solid var(--divider);
    }

    .top-bar-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 60px;
    }

    .brand-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }

    .brand-icon {
        width: 36px;
        height: 36px;
        border-radius: 10px;
        background: linear-gradient(135deg, var(--primary), #4A9BF0);
        color: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 16px;
        box-shadow: 0 2px 8px rgba(30, 111, 217, .25);
    }

    .brand-name {
        font-size: 20px;
        font-weight: 700;
        color: var(--dark);
        letter-spacing: .01em;
    }

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

    .hamburger-menu {
        display: none;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
        background: none;
        border: none;
        cursor: pointer;
        padding: 8px;
        border-radius: 8px;
        transition: background .2s;
    }

    .hamburger-menu:hover {
        background: var(--surface);
    }

    .hamburger-menu span {
        display: block;
        width: 22px;
        height: 2px;
        background: var(--text-heading);
        border-radius: 2px;
        transition: transform .3s ease, opacity .3s ease;
    }

    .hamburger-menu.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .hamburger-menu.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger-menu.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    .channel-bar {
        position: relative;
    }

    .channel-bar-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 52px;
        gap: 20px;
    }

    .main-nav {
        display: flex;
        align-items: center;
        gap: 6px;
        overflow-x: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }

    .main-nav::-webkit-scrollbar {
        display: none;
    }

    .nav-link {
        padding: 8px 14px;
        font-size: 15px;
        color: var(--text-body);
        border-radius: 8px;
        font-weight: 500;
        position: relative;
        white-space: nowrap;
        transition: color .2s ease, background .2s ease;
    }

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

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

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

    .nav-tools {
        display: flex;
        align-items: center;
        gap: 16px;
        flex-shrink: 0;
    }

    .search-box {
        position: relative;
        width: 220px;
    }

    .search-box input {
        width: 100%;
        height: 38px;
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        padding: 0 38px 0 14px;
        font-size: 14px;
        color: var(--text-body);
        background: var(--surface);
        transition: all .25s ease;
    }

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

    .search-box input:focus {
        outline: none;
        border-color: var(--primary);
        background: #fff;
        box-shadow: 0 0 0 3px rgba(30, 111, 217, .15);
    }

    .search-box i {
        position: absolute;
        right: 13px;
        top: 50%;
        transform: translateY(-50%);
        color: var(--text-secondary);
        font-size: 14px;
        pointer-events: none;
    }

    .hot-tags {
        display: flex;
        align-items: center;
        gap: 8px;
    }

    .hot-tags a {
        font-size: 13px;
        color: var(--text-secondary);
        padding: 4px 12px;
        background: var(--surface);
        border-radius: 999px;
        border: 1px solid var(--border);
        transition: all .2s ease;
        white-space: nowrap;
    }

    .hot-tags a:hover {
        color: var(--primary);
        border-color: var(--primary);
        background: var(--primary-light);
    }

    .mobile-nav {
        display: none;
        background: var(--surface);
        border-top: 1px solid var(--divider);
        padding: 12px 20px 18px;
        max-height: 0;
        overflow: hidden;
        transition: max-height .4s ease, padding .3s ease;
    }

    .mobile-nav.open {
        display: block;
        max-height: 500px;
        padding-top: 16px;
        padding-bottom: 20px;
    }

    .mobile-nav a {
        display: block;
        padding: 12px 8px;
        font-size: 15px;
        color: var(--text-body);
        border-bottom: 1px solid var(--divider);
        border-radius: 6px;
        transition: color .2s, background .2s;
    }

    .mobile-nav a:hover {
        color: var(--primary);
        background: rgba(30, 111, 217, .04);
    }

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

    .mobile-search {
        display: flex;
        gap: 8px;
        margin-top: 14px;
    }

    .mobile-search input {
        flex: 1;
        height: 40px;
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        padding: 0 14px;
        font-size: 14px;
        color: var(--text-body);
        background: #fff;
        transition: border-color .2s, box-shadow .2s;
    }

    .mobile-search input:focus {
        outline: none;
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(30, 111, 217, .15);
    }

    .mobile-search button {
        width: 40px;
        height: 40px;
        border: none;
        border-radius: var(--radius-sm);
        background: var(--primary);
        color: #fff;
        cursor: pointer;
        flex-shrink: 0;
        transition: background .2s;
    }

    .mobile-search button:hover {
        background: var(--primary-dark);
    }

    .breadcrumb-bar {
        background: var(--surface);
        border-bottom: 1px solid var(--divider);
    }

    .breadcrumb-nav {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 14px 0;
        font-size: 13px;
        color: var(--text-secondary);
    }

    .breadcrumb-nav a {
        color: var(--text-secondary);
        transition: color .2s;
    }

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

    .breadcrumb-nav i {
        font-size: 10px;
        color: var(--text-disabled);
    }

    .breadcrumb-nav .current {
        color: var(--text-heading);
        font-weight: 500;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        max-width: 260px;
    }

    .article-section {
        padding: 48px 0 56px;
        background: #fff;
    }

    .article-wrapper {
        max-width: 900px;
        margin: 0 auto;
    }

    .back-link {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 14px;
        color: var(--text-secondary);
        margin-bottom: 20px;
        padding: 6px 12px;
        border-radius: var(--radius-sm);
        background: var(--surface);
        border: 1px solid var(--border);
        transition: all .2s ease;
    }

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

    .article-detail h1 {
        font-size: 36px;
        font-weight: 700;
        color: var(--text-heading);
        line-height: 1.35;
        margin-bottom: 22px;
        letter-spacing: .01em;
    }

    .article-meta {
        display: flex;
        align-items: center;
        gap: 22px;
        padding-bottom: 24px;
        border-bottom: 1px solid var(--divider);
        margin-bottom: 30px;
        color: var(--text-secondary);
        font-size: 14px;
        flex-wrap: wrap;
    }

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

    .meta-item i {
        color: var(--primary);
        font-size: 13px;
    }

    .article-content {
        max-width: 768px;
        margin: 0 auto;
    }

    .article-content p {
        font-size: 16px;
        line-height: 1.85;
        color: var(--text-body);
        margin-bottom: 1.5em;
    }

    .article-content h2 {
        font-size: 24px;
        font-weight: 700;
        color: var(--text-heading);
        margin: 2em 0 1em;
        line-height: 1.4;
        padding-left: 14px;
        border-left: 4px solid var(--primary);
    }

    .article-content h3 {
        font-size: 19px;
        font-weight: 600;
        color: var(--text-heading);
        margin: 1.8em 0 .8em;
        line-height: 1.4;
    }

    .article-content h4 {
        font-size: 16px;
        font-weight: 600;
        color: var(--text-heading);
        margin: 1.5em 0 .6em;
    }

    .article-content ul,
    .article-content ol {
        margin: 0 0 1.5em;
        padding-left: 1.6em;
    }

    .article-content li {
        font-size: 16px;
        line-height: 1.8;
        margin-bottom: 8px;
    }

    .article-content blockquote {
        border-left: 4px solid var(--primary);
        background: var(--primary-light);
        padding: 18px 22px;
        margin: 1.8em 0;
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--text-body);
        font-size: 15px;
        line-height: 1.75;
    }

    .article-content blockquote p {
        margin-bottom: 0;
    }

    .article-content blockquote p + p {
        margin-top: .8em;
    }

    .article-content img {
        border-radius: var(--radius-md);
        margin: 1.5em 0;
        box-shadow: var(--shadow-sm);
    }

    .article-content a {
        color: var(--primary);
        text-decoration: underline;
        text-underline-offset: 3px;
        transition: color .2s;
    }

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

    .article-content strong {
        color: var(--text-heading);
        font-weight: 600;
    }

    .article-content table {
        width: 100%;
        border-collapse: collapse;
        margin: 1.5em 0;
        font-size: 14px;
        line-height: 1.6;
    }

    .article-content table th,
    .article-content table td {
        border: 1px solid var(--border);
        padding: 10px 14px;
        text-align: left;
    }

    .article-content table th {
        background: var(--surface);
        font-weight: 600;
        color: var(--text-heading);
    }

    .article-content table tr:hover td {
        background: rgba(30, 111, 217, .02);
    }

    .article-content code {
        background: var(--surface);
        padding: 2px 8px;
        border-radius: 4px;
        font-size: 14px;
        color: var(--primary-dark);
    }

    .article-content pre {
        background: var(--dark);
        color: #dbe6f5;
        padding: 18px 20px;
        border-radius: var(--radius-sm);
        overflow-x: auto;
        font-size: 14px;
        line-height: 1.7;
        margin: 1.5em 0;
    }

    .article-content pre code {
        background: transparent;
        padding: 0;
        color: inherit;
    }

    .not-found-box {
        text-align: center;
        padding: 60px 30px;
        background: var(--surface);
        border-radius: var(--radius-lg);
        border: 1px dashed var(--border);
    }

    .not-found-box i {
        font-size: 42px;
        color: var(--text-disabled);
        margin-bottom: 16px;
    }

    .not-found-title {
        font-size: 28px;
        font-weight: 700;
        color: var(--text-heading);
        margin-bottom: 12px;
    }

    .not-found-box p {
        font-size: 15px;
        color: var(--text-body);
        margin-bottom: 24px;
    }

    .article-bottom-section {
        padding: 40px 0;
        background: var(--surface);
        border-bottom: 1px solid var(--divider);
    }

    .article-tags {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        gap: 10px;
        margin-bottom: 28px;
    }

    .tag-label {
        font-size: 14px;
        color: var(--text-secondary);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    .tag-chip {
        font-size: 13px;
        color: var(--text-body);
        padding: 5px 14px;
        border: 1px solid var(--border);
        border-radius: 999px;
        background: #fff;
        transition: all .2s ease;
    }

    .tag-chip:hover {
        color: var(--primary);
        border-color: var(--primary);
        background: var(--primary-light);
    }

    .prev-next-wrap {
        display: flex;
        gap: 16px;
    }

    .prev-next-btn {
        flex: 1;
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 16px 20px;
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        transition: all .25s ease;
    }

    .prev-next-btn:hover {
        border-color: var(--primary);
        background: var(--primary-light);
        box-shadow: var(--shadow-sm);
        transform: translateY(-2px);
    }

    .prev-next-btn:active {
        transform: translateY(0);
    }

    .prev-next-btn i {
        color: var(--primary);
        font-size: 18px;
        flex-shrink: 0;
    }

    .prev-next-btn small {
        display: block;
        font-size: 12px;
        color: var(--text-secondary);
        margin-bottom: 3px;
    }

    .prev-next-btn strong {
        font-size: 14px;
        color: var(--text-heading);
        font-weight: 500;
        line-height: 1.4;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .prev-next-btn:last-child {
        justify-content: flex-end;
        text-align: right;
    }

    .prev-next-btn:last-child i {
        order: 2;
    }

    .related-section {
        padding: 64px 0;
        background: #fff;
        border-bottom: 1px solid var(--divider);
    }

    .section-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 32px;
        gap: 16px;
    }

    .section-head h2 {
        font-size: 28px;
        font-weight: 700;
        color: var(--text-heading);
        line-height: 1.3;
    }

    .more-link {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 14px;
        color: var(--primary);
        font-weight: 500;
        transition: gap .2s ease;
    }

    .more-link:hover {
        gap: 12px;
    }

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

    .related-card {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        overflow: hidden;
        transition: all .25s ease;
        display: flex;
        flex-direction: column;
    }

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

    .related-thumb {
        aspect-ratio: 16 / 9;
        background: #EAF2FA;
        overflow: hidden;
    }

    .related-thumb img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform .4s ease;
    }

    .related-card:hover .related-thumb img {
        transform: scale(1.04);
    }

    .related-body {
        padding: 18px;
        display: flex;
        flex-direction: column;
        flex: 1;
    }

    .related-body .badge {
        margin-bottom: 10px;
        align-self: flex-start;
    }

    .related-body h3 {
        font-size: 15px;
        font-weight: 600;
        color: var(--text-heading);
        line-height: 1.5;
        margin-bottom: 8px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        transition: color .2s;
    }

    .related-card:hover .related-body h3 {
        color: var(--primary);
    }

    .related-body p {
        font-size: 13px;
        color: var(--text-secondary);
        line-height: 1.65;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .badge {
        display: inline-block;
        font-size: 12px;
        font-weight: 500;
        padding: 3px 10px;
        border-radius: 999px;
        line-height: 1.5;
        letter-spacing: .02em;
    }

    .badge-primary {
        background: rgba(30, 111, 217, .1);
        color: var(--primary);
    }

    .badge-accent {
        background: rgba(245, 158, 11, .12);
        color: #B7791F;
    }

    .badge-success {
        background: rgba(16, 185, 129, .12);
        color: #0B8A6A;
    }

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

    .faq-grid {
        display: grid;
        grid-template-columns: .85fr 1.15fr;
        gap: 60px;
        align-items: start;
    }

    .section-tag {
        display: inline-block;
        font-size: 13px;
        font-weight: 500;
        color: var(--primary);
        background: rgba(30, 111, 217, .1);
        padding: 4px 12px;
        border-radius: 999px;
        margin-bottom: 14px;
        letter-spacing: .02em;
    }

    .faq-intro h2 {
        font-size: 28px;
        font-weight: 700;
        color: var(--text-heading);
        line-height: 1.4;
        margin-bottom: 14px;
    }

    .faq-intro p {
        font-size: 15px;
        color: var(--text-secondary);
        line-height: 1.75;
    }

    .faq-list {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }

    .faq-item {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        overflow: hidden;
        transition: all .25s ease;
    }

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

    .faq-question {
        width: 100%;
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 16px 20px;
        background: none;
        border: none;
        cursor: pointer;
        font-size: 15px;
        font-weight: 500;
        color: var(--text-heading);
        text-align: left;
        transition: color .25s ease;
    }

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

    .faq-item.open .faq-question {
        color: var(--primary);
    }

    .faq-icon {
        width: 24px;
        height: 24px;
        border-radius: 50%;
        background: var(--surface);
        border: 1px solid var(--border);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 12px;
        color: var(--text-secondary);
        transition: all .3s ease;
        flex-shrink: 0;
    }

    .faq-icon i {
        transition: transform .3s ease;
    }

    .faq-item.open .faq-icon {
        background: var(--primary);
        border-color: var(--primary);
        color: #fff;
    }

    .faq-item.open .faq-icon i {
        transform: rotate(45deg);
    }

    .faq-answer {
        display: none;
        margin: 0 20px 18px;
        padding: 16px 18px;
        border-left: 3px solid var(--primary);
        background: var(--primary-light);
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    }

    .faq-item.open .faq-answer {
        display: block;
        animation: fadeIn .3s ease;
    }

    @keyframes fadeIn {
        from {
            opacity: 0;
            transform: translateY(-4px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .faq-answer p {
        font-size: 14px;
        color: var(--text-body);
        line-height: 1.75;
        margin-bottom: 0;
    }

    .cta-section {
        padding: 72px 0;
        background: var(--dark);
        position: relative;
        overflow: hidden;
    }

    .cta-section::before {
        content: '';
        position: absolute;
        top: -80px;
        right: -60px;
        width: 260px;
        height: 260px;
        border-radius: 50%;
        background: rgba(74, 155, 240, .12);
        pointer-events: none;
    }

    .cta-section::after {
        content: '';
        position: absolute;
        bottom: -60px;
        left: -40px;
        width: 180px;
        height: 180px;
        border-radius: 50%;
        background: rgba(30, 111, 217, .1);
        pointer-events: none;
    }

    .cta-box {
        text-align: center;
        max-width: 680px;
        margin: 0 auto;
        position: relative;
        z-index: 1;
    }

    .cta-box h2 {
        font-size: 32px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 12px;
        line-height: 1.35;
    }

    .cta-box>p {
        font-size: 16px;
        color: rgba(255, 255, 255, .7);
        margin-bottom: 28px;
    }

    .cta-actions {
        display: flex;
        justify-content: center;
        gap: 16px;
        margin-bottom: 18px;
        flex-wrap: wrap;
    }

    .cta-note {
        font-size: 13px;
        color: rgba(255, 255, 255, .5);
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
    }

    footer {
        background: var(--dark);
        color: rgba(255, 255, 255, .7);
        padding-top: 60px;
        border-top: 1px solid rgba(255, 255, 255, .05);
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1.6fr 1fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 40px;
    }

    .footer-logo {
        font-size: 20px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 12px;
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .footer-brand .footer-logo::before {
        content: '';
        width: 10px;
        height: 10px;
        border-radius: 3px;
        background: var(--primary);
        display: inline-block;
    }

    .footer-brand p {
        font-size: 14px;
        line-height: 1.75;
        max-width: 280px;
        color: rgba(255, 255, 255, .55);
    }

    .footer-links h4 {
        font-size: 15px;
        font-weight: 600;
        color: #fff;
        margin-bottom: 16px;
        position: relative;
        padding-bottom: 8px;
    }

    .footer-links h4::after {
        content: '';
        position: absolute;
        left: 0;
        bottom: 0;
        width: 24px;
        height: 2px;
        background: var(--primary);
        border-radius: 2px;
    }

    .footer-links a {
        display: block;
        font-size: 14px;
        color: rgba(255, 255, 255, .55);
        padding: 5px 0;
        transition: color .2s ease, padding-left .2s ease;
    }

    .footer-links a:hover {
        color: #fff;
        padding-left: 6px;
    }

    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, .08);
        padding: 20px 0;
        text-align: center;
    }

    .footer-bottom .container {
        display: flex;
        flex-direction: column;
        gap: 4px;
    }

    .footer-bottom p {
        font-size: 13px;
        color: rgba(255, 255, 255, .45);
        line-height: 1.6;
    }

    @media (max-width: 1024px) {
        .main-nav {
            display: none;
        }
        .nav-tools {
            display: none;
        }
        .hamburger-menu {
            display: flex;
        }
        .top-bar-inner {
            height: 56px;
        }
        .faq-grid {
            grid-template-columns: 1fr;
            gap: 36px;
        }
        .related-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .article-detail h1 {
            font-size: 30px;
        }
        .cta-box h2 {
            font-size: 28px;
        }
    }

    @media (max-width: 768px) {
        .container {
            padding: 0 16px;
        }
        .brand-name {
            font-size: 18px;
        }
        .top-actions .btn-outline {
            display: none;
        }
        .article-section {
            padding: 36px 0 44px;
        }
        .article-detail h1 {
            font-size: 26px;
            line-height: 1.4;
        }
        .article-content p {
            font-size: 15px;
            line-height: 1.8;
        }
        .article-meta {
            gap: 14px;
            font-size: 13px;
        }
        .related-grid {
            grid-template-columns: 1fr;
        }
        .prev-next-wrap {
            flex-direction: column;
            gap: 12px;
        }
        .prev-next-btn:last-child {
            justify-content: flex-start;
            text-align: left;
        }
        .prev-next-btn:last-child i {
            order: 0;
        }
        .section-head h2 {
            font-size: 22px;
        }
        .section-head {
            flex-direction: column;
            align-items: flex-start;
            gap: 8px;
        }
        .faq-section {
            padding: 56px 0;
        }
        .faq-intro h2 {
            font-size: 22px;
        }
        .cta-section {
            padding: 56px 0;
        }
        .cta-box h2 {
            font-size: 24px;
        }
        .cta-actions {
            flex-direction: column;
            gap: 12px;
            align-items: stretch;
            padding: 0 24px;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 28px;
        }
        .footer-brand p {
            max-width: 100%;
        }
    }

    @media (max-width: 520px) {
        .brand-name {
            font-size: 16px;
        }
        .brand-icon {
            width: 32px;
            height: 32px;
            font-size: 14px;
            border-radius: 8px;
        }
        .top-actions {
            gap: 8px;
        }
        .top-actions .btn-sm {
            padding: 6px 12px;
            font-size: 13px;
        }
        .breadcrumb-nav {
            gap: 5px;
            font-size: 12px;
        }
        .breadcrumb-nav .current {
            max-width: 150px;
        }
        .article-detail h1 {
            font-size: 22px;
        }
        .article-content blockquote {
            padding: 14px 16px;
            font-size: 14px;
        }
        .article-content table {
            font-size: 13px;
            display: block;
            overflow-x: auto;
        }
        .tag-chip {
            font-size: 12px;
            padding: 4px 10px;
        }
        .related-grid {
            gap: 16px;
        }
        .cta-note {
            font-size: 12px;
            flex-wrap: wrap;
        }
    }

    @media (min-width: 1025px) {
        .mobile-nav {
            display: none !important;
        }
    }

/* roulang page: category2 */
:root {
            --primary: #1E6FD9;
            --primary-dark: #175BB5;
            --primary-darker: #12498F;
            --dark: #0F2A5C;
            --surface: #F4F9FD;
            --card-bg: #FFFFFF;
            --accent: #F59E0B;
            --success: #10B981;
            --text-heading: #16283B;
            --text-body: #3C4A5A;
            --text-muted: #7B8A99;
            --text-disabled: #B8C4CE;
            --border: #E4ECF3;
            --divider: #E9EFF5;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-sm: 8px;
            --shadow: 0 2px 12px rgba(15, 42, 92, 0.08);
            --shadow-hover: 0 8px 24px rgba(15, 42, 92, 0.12);
            --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            background: var(--surface);
            color: var(--text-body);
            line-height: 1.75;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        body.no-scroll {
            overflow: hidden;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
        }

        a:hover,
        a:focus-visible {
            color: var(--primary-dark);
            outline: none;
        }

        a:focus-visible {
            box-shadow: 0 0 0 3px rgba(30, 111, 217, 0.4);
            border-radius: 6px;
        }

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

        button:focus-visible,
        input:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(30, 111, 217, 0.18);
        }

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

        .section {
            padding: 96px 0;
        }

        .section-head {
            max-width: 720px;
            margin-bottom: 48px;
        }

        .section-head .eyebrow,
        .split-content .eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(30, 111, 217, 0.08);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 12px;
            letter-spacing: 0.03em;
        }

        .section-head h2,
        .split-content h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .section-head p,
        .split-content p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
            transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(30, 111, 217, 0.28);
        }

        .btn-primary:hover,
        .btn-primary:focus-visible {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 20px rgba(30, 111, 217, 0.32);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            background: var(--primary-darker);
            transform: translateY(1px);
            box-shadow: 0 2px 8px rgba(30, 111, 217, 0.22);
        }

        .btn-outline {
            background: #fff;
            border-color: #D6E2EF;
            color: var(--primary);
        }

        .btn-outline:hover,
        .btn-outline:focus-visible {
            background: #F0F6FD;
            border-color: var(--primary);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(30, 111, 217, 0.08);
        }

        .btn-outline:active {
            transform: translateY(1px);
            box-shadow: none;
        }

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

        .btn-white:hover,
        .btn-white:focus-visible {
            background: #F0F6FD;
            border-color: #F0F6FD;
            color: var(--dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 255, 255, 0.16);
        }

        .btn-white:active {
            transform: translateY(1px);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.3);
        }

        .btn-ghost:hover,
        .btn-ghost:focus-visible {
            background: rgba(255, 255, 255, 0.16);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.6);
            transform: translateY(-2px);
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--divider);
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(15, 42, 92, 0.08);
        }

        .header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 16px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, #1E6FD9 0%, #2E8CE0 100%);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            box-shadow: var(--shadow);
        }

        .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-heading);
            white-space: nowrap;
        }

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

        .header-actions .btn {
            padding: 9px 20px;
            font-size: 14px;
        }

        .header-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 8px 0;
            gap: 24px;
        }

        .main-nav {
            display: flex;
            gap: 2px;
            flex-wrap: wrap;
        }

        .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            padding: 9px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-sm);
            transition: color 0.2s ease, background 0.2s ease;
        }

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

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

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-tools {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-left: auto;
        }

        .search-form {
            position: relative;
        }

        .search-form input {
            width: 220px;
            height: 38px;
            border: 1px solid #D6E2EF;
            border-radius: var(--radius-sm);
            padding: 0 14px 0 40px;
            font-size: 14px;
            background: #F8FBFE;
            color: var(--text-body);
            transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
        }

        .search-form input::placeholder {
            color: var(--text-disabled);
        }

        .search-form input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(30, 111, 217, 0.12);
            background: #fff;
        }

        .search-form .search-icon {
            position: absolute;
            left: 12px;
            top: 50%;
            transform: translateY(-50%);
            width: 16px;
            height: 16px;
            color: var(--text-muted);
            pointer-events: none;
        }

        .hot-tags {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hot-tags .tag-label {
            font-size: 13px;
            color: var(--text-muted);
        }

        .hot-tags a {
            font-size: 13px;
            color: var(--text-muted);
            background: #F0F4F9;
            border: 1px solid transparent;
            border-radius: 999px;
            padding: 4px 12px;
            transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
        }

        .hot-tags a:hover {
            color: var(--primary);
            border-color: var(--primary);
            background: rgba(30, 111, 217, 0.06);
        }

        .mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            border: 1px solid var(--border);
            align-items: center;
            justify-content: center;
            color: var(--text-heading);
        }

        .mobile-toggle:hover,
        .mobile-toggle:focus-visible {
            border-color: var(--primary);
            color: var(--primary);
        }

        .mobile-toggle svg {
            width: 22px;
            height: 22px;
        }

        .mobile-panel {
            display: none;
            position: fixed;
            inset: 0;
            background: #fff;
            z-index: 99;
            padding: 96px 24px 32px;
            overflow-y: auto;
        }

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

        .mobile-panel .mobile-nav {
            display: flex;
            flex-direction: column;
            gap: 8px;
            margin-bottom: 24px;
        }

        .mobile-panel .mobile-nav a {
            display: block;
            padding: 13px 16px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-heading);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
        }

        .mobile-panel .mobile-nav a.active {
            color: var(--primary);
            border-color: var(--primary);
            background: rgba(30, 111, 217, 0.06);
        }

        .mobile-panel .mobile-search input {
            width: 100%;
        }

        .mobile-panel .mobile-actions {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 24px;
        }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            padding: 72px 0 72px;
            background: var(--surface);
            overflow: hidden;
        }

        .page-hero .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            pointer-events: none;
        }

        .page-hero .hero-bg::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, #F4F9FD 0%, rgba(244, 249, 253, 0.72) 60%, rgba(232, 241, 250, 0.85) 100%);
        }

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

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .breadcrumb a {
            color: var(--text-muted);
        }

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

        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }

        .breadcrumb .sep {
            color: var(--text-disabled);
        }

        .hero-inner h1 {
            font-size: 40px;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }

        .hero-sub {
            max-width: 620px;
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-body);
            margin-bottom: 32px;
        }

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

        /* ===== Function Grid ===== */
        .function-section {
            background: #fff;
        }

        .function-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        .function-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
            display: flex;
            flex-direction: column;
        }

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

        .card-cover {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #EAF2FA;
        }

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

        .function-card:hover .card-cover img {
            transform: scale(1.03);
        }

        .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            align-self: flex-start;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(30, 111, 217, 0.08);
            padding: 4px 12px;
            border-radius: 999px;
        }

        .card-body h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text-heading);
            line-height: 1.4;
        }

        .card-body p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-muted);
        }

        .card-link {
            margin-top: auto;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap 0.2s ease, color 0.2s ease;
        }

        .card-link:hover,
        .card-link:focus-visible {
            color: var(--primary-dark);
            gap: 8px;
        }

        /* ===== Feature Split ===== */
        .feature-split {
            background: var(--surface);
        }

        .split-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }

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

        .split-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4 / 3;
        }

        .split-content .check-list {
            list-style: none;
            margin-top: 24px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .split-content .check-list li {
            position: relative;
            padding-left: 28px;
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.7;
        }

        .split-content .check-list li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 6px;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            background: rgba(30, 111, 217, 0.1);
            border: 2px solid var(--primary);
        }

        .split-content .check-list li::after {
            content: "";
            position: absolute;
            left: 5px;
            top: 13px;
            width: 8px;
            height: 4px;
            border-left: 2px solid var(--primary);
            border-bottom: 2px solid var(--primary);
            transform: rotate(-45deg);
        }

        /* ===== Steps Section ===== */
        .steps-section {
            background: var(--dark);
            color: #fff;
        }

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

        .steps-section .section-head p,
        .steps-section .section-head .eyebrow {
            color: rgba(255, 255, 255, 0.72);
        }

        .steps-section .section-head .eyebrow {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 32px;
        }

        .step-item {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
        }

        .step-item:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.28);
            transform: translateY(-4px);
        }

        .step-num {
            display: block;
            font-size: 36px;
            font-weight: 800;
            color: rgba(255, 255, 255, 0.5);
            letter-spacing: 0.02em;
            margin-bottom: 20px;
            line-height: 1;
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 14px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.72);
            margin: 0;
        }

        /* ===== Stats Section ===== */
        .stats-section {
            background: #fff;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            padding: 48px 40px;
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
        }

        .stat-item {
            text-align: center;
            padding: 12px 8px;
            position: relative;
        }

        .stat-item + .stat-item::before {
            content: "";
            position: absolute;
            left: 0;
            top: 12px;
            bottom: 12px;
            width: 1px;
            background: var(--divider);
        }

        .stat-item strong {
            display: block;
            font-size: 42px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.02em;
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .stat-item span {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            background: var(--surface);
        }

        .faq-layout {
            display: grid;
            grid-template-columns: 0.9fr 1.4fr;
            gap: 64px;
            align-items: start;
        }

        .faq-head .eyebrow {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(30, 111, 217, 0.08);
            padding: 4px 14px;
            border-radius: 999px;
            margin-bottom: 12px;
        }

        .faq-head h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-heading);
            line-height: 1.3;
            margin-bottom: 14px;
        }

        .faq-head p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.8;
        }

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

        details.faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 10px;
            overflow: hidden;
            transition: border-color 0.25s ease, box-shadow 0.25s ease;
        }

        details.faq-item:hover {
            border-color: #C9D9EA;
        }

        details.faq-item[open] {
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }

        details.faq-item summary {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 20px 20px 20px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-heading);
            cursor: pointer;
            list-style: none;
            user-select: none;
            transition: color 0.2s ease;
        }

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

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

        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
            color: var(--primary);
        }

        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            background: currentColor;
            border-radius: 2px;
            transition: transform 0.25s ease;
        }

        .faq-icon::before {
            width: 10px;
            height: 2px;
        }

        .faq-icon::after {
            width: 2px;
            height: 10px;
        }

        details.faq-item[open] .faq-icon {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            padding: 0 24px 24px 62px;
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-body);
            border-left: 3px solid var(--primary);
            margin-left: 24px;
            margin-right: 20px;
            background: #F8FBFE;
            border-radius: 0 8px 8px 0;
        }

        .faq-answer p {
            margin: 12px 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--dark);
            padding: 96px 0;
        }

        .cta-box {
            text-align: center;
            padding: 64px 40px;
            background: radial-gradient(circle at 50% 0%, rgba(30, 111, 217, 0.28) 0%, rgba(15, 42, 92, 0) 65%);
            border-radius: var(--radius-lg);
        }

        .cta-box h2 {
            font-size: 34px;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .cta-box p {
            max-width: 640px;
            margin: 0 auto 32px;
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.72);
        }

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

        .cta-note {
            margin-top: 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        /* ===== Footer ===== */
        footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.78);
            padding-top: 64px;
        }

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

        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 300px;
            margin: 0;
        }

        .footer-links h4 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: color 0.2s ease, padding-left 0.2s ease;
        }

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

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

        .footer-bottom .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }

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

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .header-bottom {
                display: none;
            }

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

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

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

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

            .steps-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }

            .steps-section {
                padding: 72px 0;
            }

            .section {
                padding: 72px 0;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 64px 0;
            }

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

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px 24px;
                padding: 40px 24px;
            }

            .stat-item + .stat-item::before {
                display: none;
            }

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

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

            .cta-box {
                padding: 48px 20px;
            }

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

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

            .brand-text {
                font-size: 16px;
            }

            .header-actions .btn {
                padding: 8px 14px;
                font-size: 13px;
            }

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

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

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

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

            .section-head h2,
            .split-content h2 {
                font-size: 25px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                padding: 32px 16px;
            }

            .stat-item strong {
                font-size: 34px;
            }

            .stat-item span {
                font-size: 13px;
            }

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

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 40px;
            }

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

            .step-item {
                padding: 24px;
            }

            .faq-answer {
                padding-left: 16px;
                padding-right: 16px;
                margin-left: 16px;
                margin-right: 12px;
            }

            details.faq-item summary {
                padding: 16px 14px;
            }

            .faq-icon {
                width: 22px;
                height: 22px;
            }
        }