/* roulang page: index */
:root {
            --primary: #4A90D9;
            --primary-dark: #3B7BC4;
            --secondary: #2C3E50;
            --gold: #C9A063;
            --bg: #F5F7FA;
            --white: #FFFFFF;
            --bg-alt: #EBF2F8;
            --text: #333333;
            --text-light: #4A4A4A;
            --text-muted: #8A8F99;
            --border: #E6EAF0;
            --radius-card: 12px;
            --radius-btn: 6px;
            --radius-tag: 4px;
            --shadow: 0 2px 12px rgba(44, 62, 80, 0.08);
            --shadow-hover: 0 6px 20px rgba(44, 62, 80, 0.12);
            --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

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

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin: 0 0 0.5em;
            line-height: 1.3;
            color: var(--secondary);
            font-weight: 700;
        }

        p {
            margin: 0 0 1em;
        }

        button {
            font-family: inherit;
            cursor: pointer;
        }

        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

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

        /* ---- App Shell ---- */
        .app-shell {
            min-height: 100vh;
        }

        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 240px;
            height: 100vh;
            background: var(--white);
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            z-index: 200;
            overflow-y: auto;
        }

        .sidebar-logo {
            padding: 24px 20px 12px;
            border-bottom: 1px solid #F0F2F5;
        }

        .brand-block {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 4px;
            border-radius: 8px;
            transition: background 0.2s;
        }

        .brand-block:hover {
            background: var(--bg-alt);
        }

        .brand-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-size: 22px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            letter-spacing: 1px;
        }

        .brand-text {
            display: flex;
            flex-direction: column;
        }

        .brand-text strong {
            font-size: 18px;
            font-weight: 700;
            color: var(--secondary);
            letter-spacing: 1px;
            line-height: 1.2;
        }

        .brand-text em {
            font-style: normal;
            font-size: 11px;
            color: var(--text-muted);
            letter-spacing: 2px;
            margin-top: 2px;
        }

        .sidebar-nav {
            flex: 1;
            padding: 20px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 15px;
            color: var(--text-light);
            font-weight: 500;
            transition: all 0.2s ease;
            position: relative;
            border-left: 3px solid transparent;
        }

        .nav-item i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: var(--text-muted);
            transition: color 0.2s;
        }

        .nav-item:hover {
            background: var(--bg-alt);
            color: var(--secondary);
        }

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

        .nav-item.active {
            background: var(--bg-alt);
            color: var(--primary);
            border-left-color: var(--primary);
            font-weight: 600;
        }

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

        .sidebar-badge {
            padding: 16px 20px 20px;
        }

        .badge-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 16px;
            display: flex;
            align-items: center;
            gap: 12px;
            box-shadow: var(--shadow);
        }

        .badge-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-alt);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
        }

        .badge-card strong {
            font-size: 13px;
            color: var(--secondary);
            display: block;
            line-height: 1.3;
            font-weight: 600;
        }

        .badge-card span {
            font-size: 11px;
            color: var(--text-muted);
            display: block;
            line-height: 1.3;
            margin-top: 2px;
        }

        /* ---- Main Wrapper ---- */
        .main-wrapper {
            margin-left: 240px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .main-content {
            flex: 1;
        }

        /* ---- Mobile Topbar ---- */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--white);
            border-bottom: 1px solid var(--border);
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            z-index: 300;
            box-shadow: 0 2px 8px rgba(44, 62, 80, 0.05);
        }

        .mobile-topbar .hamburger {
            background: none;
            border: none;
            font-size: 22px;
            color: var(--secondary);
            width: 40px;
            height: 40px;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .mobile-topbar .hamburger:hover {
            background: var(--bg-alt);
        }

        .mobile-topbar .brand-text-mobile {
            font-size: 15px;
            font-weight: 600;
            color: var(--secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            padding: 0 8px;
            letter-spacing: 0.5px;
        }

        .mobile-topbar .entry-btn {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: 6px;
            padding: 8px 18px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            white-space: nowrap;
            transition: background 0.2s;
        }

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

        .drawer-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(44, 62, 80, 0.4);
            z-index: 250;
        }

        .drawer-overlay.show {
            display: block;
        }

        /* ---- Hero ---- */
        .hero {
            position: relative;
            background: linear-gradient(135deg, var(--bg-alt) 0%, var(--bg) 70%);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 80px 0;
            min-height: 70vh;
            display: flex;
            align-items: center;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255, 255, 255, 0.88);
            z-index: 1;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            gap: 48px;
        }

        .hero-text {
            flex: 1.5;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: var(--primary);
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-bottom: 20px;
            padding-left: 16px;
            position: relative;
            font-weight: 600;
        }

        .hero-badge::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 16px;
            background: var(--primary);
            border-radius: 2px;
        }

        .hero h1 {
            font-size: 40px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 16px;
            letter-spacing: 1px;
            line-height: 1.2;
        }

        .hero-sub {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 16px;
            max-width: 560px;
        }

        .hero-note {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 28px;
            letter-spacing: 0.5px;
        }

        .hero-note i {
            color: var(--primary);
            margin: 0 4px;
        }

        .hero-cta-group {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 0 28px;
            height: 52px;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border: 1px solid var(--primary-dark);
            border-radius: var(--radius-btn);
            transition: all 0.2s ease;
            box-shadow: 0 2px 6px rgba(74, 144, 217, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 4px 12px rgba(74, 144, 217, 0.3);
            transform: translateY(-1px);
            color: #fff;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 4px rgba(74, 144, 217, 0.2);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 0 28px;
            height: 52px;
            font-size: 15px;
            font-weight: 500;
            color: var(--primary);
            background: var(--white);
            border: 1px solid var(--primary);
            border-radius: var(--radius-btn);
            transition: all 0.2s ease;
        }

        .btn-secondary:hover {
            background: var(--bg-alt);
            color: var(--secondary);
            border-color: var(--secondary);
        }

        .hero-trust {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .hero-trust .stars {
            color: var(--gold);
            font-size: 13px;
            letter-spacing: 2px;
        }

        .hero-trust .verify-icon {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: #3BA272;
            color: #fff;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 10px;
        }

        .hero-visual {
            flex: 1;
            position: relative;
        }

        .hero-visual img {
            border-radius: var(--radius-card);
            box-shadow: 0 8px 30px rgba(44, 62, 80, 0.15);
            border: 8px solid var(--white);
            max-height: 420px;
            object-fit: cover;
            width: 100%;
            aspect-ratio: 4/3;
        }

        /* ---- Section Common ---- */
        .section {
            padding: 80px 0;
        }

        .section-header {
            margin-bottom: 48px;
            text-align: center;
        }

        .section-header .section-en {
            font-size: 13px;
            color: var(--primary);
            letter-spacing: 4px;
            text-transform: uppercase;
            display: block;
            margin-bottom: 10px;
            font-weight: 600;
        }

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

        .section-header p {
            color: var(--text-muted);
            font-size: 14px;
            max-width: 600px;
            margin: 0 auto;
        }

        /* ---- Features Slider ---- */
        .features-section {
            background: var(--white);
        }

        .feature-slider-container {
            background: var(--white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow);
            padding: 40px;
            max-width: 960px;
            margin: 0 auto 40px;
            position: relative;
        }

        .feature-slide {
            display: none;
            grid-template-columns: 1.2fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .feature-slide.active {
            display: grid;
            animation: fadeIn 0.4s ease;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateX(12px);
            }

            to {
                opacity: 1;
                transform: translateX(0);
            }
        }

        .feature-slide-image {
            border-radius: 10px;
            overflow: hidden;
            aspect-ratio: 16/10;
        }

        .feature-slide-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .feature-slide-text h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--secondary);
            margin-bottom: 16px;
        }

        .feature-slide-text p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .feature-slide-text .feature-points {
            margin-top: 16px;
            list-style: none;
            padding: 0;
        }

        .feature-slide-text .feature-points li {
            font-size: 14px;
            color: var(--text-light);
            padding: 6px 0;
            position: relative;
            padding-left: 22px;
        }

        .feature-slide-text .feature-points li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: 700;
        }

        .slider-controls {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 16px;
            margin-top: 0;
        }

        .slider-btn {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--white);
            border: 1px solid var(--primary);
            color: var(--primary);
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s;
            cursor: pointer;
        }

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

        .slider-dots {
            display: flex;
            gap: 8px;
        }

        .slider-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            border: none;
            background: #C8D0DA;
            padding: 0;
            transition: background 0.2s;
        }

        .slider-dot.active {
            background: var(--primary);
        }

        .stats-row {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 20px;
            flex-wrap: wrap;
        }

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

        .stat-item strong {
            display: block;
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }

        .stat-item span {
            font-size: 13px;
            color: var(--text-muted);
            display: block;
            margin-top: 4px;
        }

        /* ---- Value Cards ---- */
        .value-section {
            background: var(--bg);
        }

        .value-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 24px;
            max-width: 1080px;
            margin: 0 auto;
        }

        .value-card-large {
            background: var(--white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow);
            padding: 32px;
            display: flex;
            flex-direction: column;
            transition: all 0.3s ease;
        }

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

        .value-card-large .icon-circle {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 20px;
            margin-bottom: 20px;
        }

        .value-card-large h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--secondary);
            margin-bottom: 12px;
        }

        .value-card-large p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }

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

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

        .value-card-large .card-img {
            border-radius: 8px;
            overflow: hidden;
            margin-top: 12px;
            aspect-ratio: 16/7;
        }

        .value-card-large .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .value-card-small {
            background: var(--white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow);
            padding: 24px;
            display: flex;
            flex-direction: column;
            transition: all 0.3s ease;
        }

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

        .value-card-small .icon-sm {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 15px;
            margin-bottom: 16px;
        }

        .value-card-small h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--secondary);
            margin-bottom: 8px;
        }

        .value-card-small p {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
        }

        .tag-link {
            display: inline-block;
            padding: 5px 14px;
            border-radius: 999px;
            border: 1px solid var(--primary);
            color: var(--primary);
            font-size: 12px;
            font-weight: 500;
            transition: all 0.2s;
            align-self: flex-start;
        }

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

        /* ---- System Requirements ---- */
        .sys-section {
            background: var(--white);
        }

        .sys-wrap {
            max-width: 1080px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px 48px;
        }

        .sys-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border);
        }

        .sys-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 18px;
            flex-shrink: 0;
        }

        .sys-meta {
            flex: 1;
        }

        .sys-meta strong {
            font-size: 16px;
            color: var(--secondary);
            font-weight: 600;
            display: block;
            margin-bottom: 4px;
        }

        .sys-meta p {
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 0;
            line-height: 1.5;
        }

        .sys-toggle {
            text-align: right;
            margin-top: 32px;
            max-width: 1080px;
            margin-left: auto;
            margin-right: auto;
        }

        .sys-toggle-btn {
            background: none;
            border: none;
            color: var(--primary);
            font-size: 14px;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 0;
        }

        .sys-toggle-btn i {
            transition: transform 0.3s;
        }

        .sys-toggle-btn.open i {
            transform: rotate(180deg);
        }

        .sys-tip {
            display: none;
            background: #F0F6FC;
            border-radius: 8px;
            padding: 16px;
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.6;
            margin-top: 16px;
            max-width: 1080px;
            margin-left: auto;
            margin-right: auto;
        }

        .sys-tip.show {
            display: block;
        }

        /* ---- Testimonials ---- */
        .testimonials {
            background: var(--secondary);
            padding: 80px 0;
        }

        .testimonials .section-header h2 {
            color: #fff;
        }

        .testimonials .section-header p {
            color: rgba(255, 255, 255, 0.65);
        }

        .testimonials .section-en {
            color: #7AB0E6;
        }

        .testimonial-grid {
            max-width: 1080px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .testimonial-card {
            background: var(--white);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
            transition: all 0.3s ease;
        }

        .testimonial-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }

        .testimonial-stars {
            color: var(--gold);
            font-size: 13px;
            letter-spacing: 3px;
            display: flex;
            gap: 1px;
            margin-bottom: 14px;
        }

        .testimonial-card p {
            font-size: 14px;
            color: var(--text);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .author-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--secondary);
            font-weight: 600;
            flex-shrink: 0;
        }

        .author-meta {
            flex: 1;
        }

        .author-meta strong {
            font-size: 13px;
            color: var(--secondary);
            font-weight: 600;
            display: block;
        }

        .author-meta span {
            font-size: 12px;
            color: var(--text-muted);
        }

        .author-verified {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            flex-shrink: 0;
        }

        /* ---- Download CTA ---- */
        .download-section {
            padding: 80px 0;
            background: var(--white);
            text-align: center;
        }

        .download-section .section-en {
            font-size: 12px;
            color: var(--primary);
            letter-spacing: 4px;
            text-transform: uppercase;
            display: block;
            margin-bottom: 12px;
            font-weight: 600;
        }

        .download-section h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 16px;
        }

        .download-section p {
            font-size: 14px;
            color: var(--text-muted);
            max-width: 520px;
            margin: 0 auto 36px;
        }

        .download-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .btn-download {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 0 36px;
            height: 52px;
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            transition: all 0.2s;
        }

        .btn-download.primary {
            background: var(--primary);
            color: #fff;
            border: 1px solid var(--primary-dark);
        }

        .btn-download.primary:hover {
            background: var(--secondary);
            border-color: var(--secondary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(44, 62, 80, 0.2);
        }

        .btn-download.outline {
            background: var(--white);
            color: var(--primary);
            border: 1px solid var(--primary);
        }

        .btn-download.outline:hover {
            background: var(--bg-alt);
            color: var(--secondary);
            border-color: var(--secondary);
            transform: translateY(-2px);
        }

        .version-note {
            font-size: 12px;
            color: var(--text-muted);
            letter-spacing: 0.5px;
        }

        /* ---- News Section ---- */
        .news-section {
            padding: 80px 0;
            background: var(--bg);
        }

        .news-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 36px;
            max-width: 1080px;
            margin-left: auto;
            margin-right: auto;
        }

        .news-header h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 0;
        }

        .news-list-wrap {
            max-width: 1080px;
            margin: 0 auto;
        }

        .news-list-item {
            background: var(--white);
            border-radius: 10px;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            gap: 20px;
            transition: background 0.2s;
            border-bottom: 1px solid #F0F2F5;
            margin-bottom: 8px;
        }

        .news-list-item:hover {
            background: #F7FAFC;
        }

        .news-date-box {
            width: 64px;
            background: var(--bg-alt);
            border-radius: 8px;
            padding: 10px 0;
            text-align: center;
            flex-shrink: 0;
        }

        .news-date-box .day {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            display: block;
        }

        .news-date-box .month {
            font-size: 12px;
            color: var(--text-muted);
        }

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

        .news-content h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--secondary);
            margin-bottom: 6px;
            line-height: 1.4;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .news-content h3 a {
            color: inherit;
        }

        .news-content h3 a:hover {
            color: var(--primary);
        }

        .news-content p {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 0;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .news-cat-tag {
            padding: 4px 12px;
            border-radius: 999px;
            border: 1px solid var(--primary);
            color: var(--primary);
            font-size: 12px;
            font-weight: 500;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .news-arrow {
            color: var(--text-muted);
            font-size: 14px;
            flex-shrink: 0;
            transition: transform 0.2s;
        }

        .news-list-item:hover .news-arrow {
            transform: translateX(4px);
            color: var(--primary);
        }

        .news-empty {
            background: var(--white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow);
            padding: 60px 24px;
            text-align: center;
            color: var(--text-muted);
            font-size: 14px;
        }

        .news-empty .empty-icon {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: #F0F2F5;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--text-muted);
            margin: 0 auto 16px;
        }

        /* ---- FAQ ---- */
        .faq-section {
            padding: 80px 0;
            background: var(--white);
        }

        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }

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

        .accordion-item {
            background: var(--white);
            border-radius: 8px;
            box-shadow: var(--shadow);
            margin-bottom: 12px;
            border: 1px solid var(--border);
            overflow: hidden;
        }

        .accordion-title {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            background: var(--white);
            color: var(--secondary);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: color 0.2s;
            text-decoration: none;
        }

        .accordion-title:hover {
            color: var(--primary);
            background: var(--white);
        }

        .accordion-title .accordion-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--primary);
            transition: transform 0.3s;
            flex-shrink: 0;
        }

        .accordion-item.is-active .accordion-icon {
            transform: rotate(45deg);
        }

        .accordion-content {
            display: none;
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            background: #F9FBFD;
            border-top: 1px solid var(--border);
            padding-top: 16px;
        }

        .accordion-item.is-active .accordion-content {
            display: block;
        }

        /* ---- Footer ---- */
        .site-footer {
            background: var(--secondary);
            color: rgba(255, 255, 255, 0.8);
            padding: 0;
        }

        .footer-main {
            max-width: 1080px;
            margin: 0 auto;
            padding: 48px 24px 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 32px;
        }

        .footer-brand h3 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 2px;
        }

        .footer-brand p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.6;
            margin-bottom: 16px;
            max-width: 320px;
        }

        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(201, 160, 99, 0.15);
            color: var(--gold);
            font-size: 12px;
            padding: 6px 14px;
            border-radius: 999px;
            font-weight: 500;
            border: 1px solid rgba(201, 160, 99, 0.3);
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            padding: 4px 0;
            transition: color 0.2s;
        }

        .footer-col a:hover {
            color: #7AB0E6;
        }

        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }

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

        .footer-domain {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-note {
            text-align: center;
            padding: 16px 24px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.35);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        /* ---- Responsive ---- */
        @media (max-width: 1023px) {
            .sidebar {
                transform: translateX(-100%);
                transition: transform 0.3s ease;
                box-shadow: 2px 0 20px rgba(44, 62, 80, 0.15);
            }

            .sidebar.open {
                transform: translateX(0);
            }

            .main-wrapper {
                margin-left: 0;
            }

            .mobile-topbar {
                display: flex;
            }

            .main-content {
                padding-top: 60px;
            }

            .hero {
                min-height: auto;
                padding: 60px 0;
            }

            .hero-inner {
                flex-direction: column;
                gap: 32px;
            }

            .hero-text {
                flex: none;
            }

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

            .hero-visual {
                flex: none;
                width: 100%;
                max-width: 480px;
            }

            .feature-slide {
                grid-template-columns: 1fr;
            }

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

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

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

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

        @media (max-width: 639px) {
            .section {
                padding: 48px 0;
            }

            .hero {
                padding: 40px 0;
            }

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

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

            .btn-primary,
            .btn-secondary {
                width: 100%;
            }

            .feature-slider-container {
                padding: 20px;
            }

            .stats-row {
                gap: 24px;
            }

            .stat-item strong {
                font-size: 24px;
            }

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

            .news-list-item {
                flex-wrap: wrap;
                gap: 12px;
            }

            .news-content h3 {
                white-space: normal;
            }

            .news-content p {
                white-space: normal;
            }

            .download-btns {
                flex-direction: column;
                align-items: center;
            }

            .btn-download {
                width: 100%;
                max-width: 300px;
            }

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

            .sys-item {
                padding: 16px 0;
            }

            .value-card-large {
                padding: 24px;
            }

            .value-card-small {
                padding: 20px;
            }
        }

        /* Utility */
        .text-center {
            text-align: center;
        }

        .mb-16 {
            margin-bottom: 16px;
        }

        .mb-32 {
            margin-bottom: 32px;
        }

/* roulang page: article */
:root {
            --primary: #4A90D9;
            --primary-dark: #3B7BC4;
            --primary-light: #EBF2F8;
            --secondary: #2C3E50;
            --gold: #C9A063;
            --bg: #F5F7FA;
            --white: #FFFFFF;
            --text: #333333;
            --text-secondary: #4A4A4A;
            --text-light: #8A8F99;
            --border: #E6EAF0;
            --border-light: #F0F2F5;
            --radius-lg: 12px;
            --radius-md: 8px;
            --radius-sm: 6px;
            --radius-pill: 999px;
            --shadow-sm: 0 2px 12px rgba(44, 62, 80, 0.08);
            --shadow-md: 0 6px 20px rgba(44, 62, 80, 0.12);
            --shadow-hover: 0 8px 24px rgba(44, 62, 80, 0.12);
            --transition: 0.2s ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            font-family: inherit;
        }
        a:focus-visible,
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 240px;
            height: 100vh;
            background: var(--white);
            border-right: 1px solid var(--border);
            z-index: 100;
            display: flex;
            flex-direction: column;
        }
        .sidebar-inner {
            display: flex;
            flex-direction: column;
            height: 100%;
            padding: 24px 20px;
        }
        .sidebar-logo {
            margin-bottom: 32px;
        }
        .sidebar-logo a {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .logo-mark {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            letter-spacing: 1px;
            flex-shrink: 0;
        }
        .logo-text strong {
            display: block;
            font-size: 18px;
            font-weight: 600;
            color: var(--secondary);
            line-height: 1.2;
        }
        .logo-text span {
            font-size: 11px;
            color: var(--text-light);
            letter-spacing: 2px;
        }
        .sidebar-nav {
            flex: 1;
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-md);
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            position: relative;
            margin-bottom: 4px;
            transition: background var(--transition), color var(--transition);
        }
        .nav-item i {
            font-size: 16px;
            color: var(--text-light);
            width: 20px;
            text-align: center;
            transition: color var(--transition);
        }
        .nav-item:hover {
            background: var(--primary-light);
            color: var(--secondary);
        }
        .nav-item:hover i {
            color: var(--primary);
        }
        .nav-item.active {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-item.active i {
            color: var(--primary);
        }
        .nav-item.active::before {
            content: "";
            position: absolute;
            left: -20px;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 20px;
            border-radius: 0 3px 3px 0;
            background: var(--primary);
        }
        .sidebar-badge {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            background: var(--white);
            margin-top: 16px;
        }
        .sidebar-badge i {
            font-size: 20px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .sidebar-badge strong {
            display: block;
            font-size: 12px;
            color: var(--secondary);
            line-height: 1.3;
        }
        .sidebar-badge span {
            font-size: 11px;
            color: var(--text-light);
        }

        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--white);
            border-bottom: 1px solid var(--border);
            z-index: 110;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            box-shadow: 0 1px 8px rgba(44, 62, 80, 0.06);
        }
        .hamburger {
            width: 40px;
            height: 40px;
            border: none;
            background: transparent;
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
        }
        .hamburger span {
            display: block;
            height: 2px;
            background: var(--secondary);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .mobile-logo {
            font-size: 15px;
            font-weight: 600;
            color: var(--secondary);
            flex: 1;
            text-align: center;
        }
        .mobile-cta {
            background: var(--primary);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--primary-dark);
            transition: background var(--transition);
        }
        .mobile-cta:hover {
            background: var(--primary-dark);
            color: #fff;
        }

        .drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(44, 62, 80, 0.4);
            z-index: 120;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .drawer-overlay.open {
            opacity: 1;
        }
        .drawer {
            position: fixed;
            top: 0;
            left: -280px;
            width: 280px;
            height: 100vh;
            background: var(--white);
            z-index: 130;
            transition: left 0.3s ease;
            padding: 24px 20px;
            display: flex;
            flex-direction: column;
        }
        .drawer.open {
            left: 0;
        }
        .drawer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--border);
            margin-bottom: 24px;
        }
        .drawer-logo strong {
            font-size: 18px;
            color: var(--secondary);
        }
        .drawer-logo span {
            font-size: 11px;
            color: var(--text-light);
            letter-spacing: 2px;
        }
        .drawer nav a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 16px;
            border-radius: var(--radius-md);
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 4px;
        }
        .drawer nav a i {
            width: 20px;
            text-align: center;
            color: var(--text-light);
        }
        .drawer nav a.active {
            background: var(--primary-light);
            color: var(--primary);
        }
        .drawer nav a.active i {
            color: var(--primary);
        }

        .main-wrapper {
            margin-left: 240px;
            min-height: calc(100vh - 120px);
            padding-top: 32px;
        }

        .article-page {
            max-width: 860px;
            margin: 0 auto;
            padding: 0 24px 64px;
        }

        .breadcrumb {
            font-size: 13px;
            color: var(--text-light);
            margin-bottom: 32px;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--primary);
        }
        .breadcrumb a:hover {
            color: var(--primary-dark);
        }
        .breadcrumb .current {
            color: var(--secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 300px;
        }

        .article-header {
            margin-bottom: 24px;
        }
        .article-header h1 {
            font-size: 28px;
            font-weight: 700;
            color: var(--secondary);
            line-height: 1.4;
            margin-bottom: 16px;
            word-break: break-word;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            font-size: 14px;
            color: var(--text-light);
            flex-wrap: wrap;
        }
        .article-meta .sep {
            color: var(--border);
        }
        .article-divider {
            border: none;
            border-top: 1px solid var(--border);
            margin: 24px 0 32px;
        }

        .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text);
            word-break: break-word;
        }
        .article-content h2 {
            font-size: 22px;
            font-weight: 600;
            color: var(--secondary);
            border-left: 4px solid var(--primary);
            padding-left: 16px;
            margin: 32px 0 16px;
            line-height: 1.5;
        }
        .article-content h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--secondary);
            margin: 28px 0 12px;
            line-height: 1.5;
        }
        .article-content h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--secondary);
            margin: 24px 0 12px;
        }
        .article-content p {
            margin-bottom: 24px;
        }
        .article-content ul,
        .article-content ol {
            margin: 0 0 24px 0;
            padding-left: 8px;
        }
        .article-content ul li {
            position: relative;
            padding-left: 22px;
            margin-bottom: 8px;
            list-style: none;
        }
        .article-content ul li::before {
            content: "◆";
            color: var(--primary);
            position: absolute;
            left: 2px;
            top: 0.45em;
            font-size: 10px;
        }
        .article-content ol {
            padding-left: 20px;
        }
        .article-content ol li {
            margin-bottom: 8px;
        }
        .article-content img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius-md);
            margin: 32px auto;
            box-shadow: var(--shadow-sm);
            display: block;
        }
        .article-content figure {
            margin: 32px 0;
            text-align: center;
        }
        .article-content figure img {
            margin: 0 auto;
        }
        .article-content figcaption {
            font-size: 12px;
            color: var(--text-light);
            margin-top: 12px;
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: #F7FAFC;
            padding: 16px 20px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            font-size: 15px;
            color: var(--text-secondary);
            margin: 24px 0;
        }
        .article-content blockquote p {
            margin-bottom: 0;
        }
        .article-content a {
            color: var(--primary);
            border-bottom: 1px solid transparent;
        }
        .article-content a:hover {
            border-bottom-color: var(--primary);
        }
        .article-content strong {
            color: var(--secondary);
            font-weight: 600;
        }
        .article-content hr {
            border: none;
            border-top: 1px solid var(--border);
            margin: 40px 0;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin: 32px 0;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .tag {
            display: inline-block;
            padding: 5px 14px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            border-radius: var(--radius-pill);
            font-weight: 500;
        }

        .post-nav {
            display: flex;
            gap: 16px;
            margin-bottom: 40px;
        }
        .post-nav a {
            flex: 1;
            padding: 16px;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            font-size: 14px;
            color: var(--text-secondary);
            transition: all var(--transition);
            text-decoration: none;
        }
        .post-nav a:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .related-section {
            margin-bottom: 48px;
        }
        .related-section h2 {
            font-size: 20px;
            font-weight: 600;
            color: var(--secondary);
            margin-bottom: 24px;
            position: relative;
            padding-left: 16px;
        }
        .related-section h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 20px;
            border-radius: 2px;
            background: var(--primary);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            display: block;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .related-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .related-thumb {
            width: 100%;
            aspect-ratio: 3 / 2;
            background: var(--border-light);
            overflow: hidden;
            position: relative;
        }
        .related-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }
        .related-card:hover .related-thumb img {
            transform: scale(1.04);
        }
        .related-info {
            padding: 16px;
        }
        .related-info span {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--secondary);
            line-height: 1.5;
            margin-bottom: 8px;
        }
        .related-info small {
            font-size: 12px;
            color: var(--text-light);
        }

        .back-link {
            text-align: center;
            margin-top: 16px;
        }
        .back-link a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--primary);
            padding: 10px 20px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }
        .back-link a i {
            transition: transform var(--transition);
        }
        .back-link a:hover i {
            transform: translateX(-4px);
        }
        .back-link a:hover {
            background: var(--primary-light);
            color: var(--secondary);
        }

        .not-found {
            text-align: center;
            padding: 80px 24px;
            background: var(--white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            margin: 32px 0;
        }
        .not-found i {
            font-size: 48px;
            color: var(--text-light);
            margin-bottom: 16px;
        }
        .not-found p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .not-found a {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 10px 28px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 500;
            transition: background var(--transition);
        }
        .not-found a:hover {
            background: var(--primary-dark);
            color: #fff;
        }

        .site-footer {
            margin-left: 240px;
            background: var(--secondary);
            color: #C8D0DA;
            padding-top: 48px;
        }
        .footer-main {
            max-width: 1080px;
            margin: 0 auto;
            padding: 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 13px;
            line-height: 1.7;
            color: #AEB9C4;
            margin-bottom: 16px;
            max-width: 360px;
        }
        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            color: var(--gold);
            background: rgba(201, 160, 99, 0.12);
            padding: 6px 14px;
            border-radius: var(--radius-pill);
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            font-size: 13px;
            color: #AEB9C4;
            padding: 5px 0;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: #7AB0E6;
            padding-left: 4px;
        }
        .footer-divider {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid #3A4A5E;
            padding: 20px 0;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-copy {
            font-size: 13px;
            color: #AEB9C4;
        }
        .footer-domain {
            font-size: 13px;
            color: #7A8898;
        }
        .footer-note {
            text-align: center;
            font-size: 12px;
            color: #7A8898;
            background: #243342;
            padding: 14px 16px;
            letter-spacing: 1px;
        }

        @media (max-width: 1023.98px) {
            .sidebar {
                display: none;
            }
            .mobile-header {
                display: flex;
            }
            .main-wrapper {
                margin-left: 0;
                padding-top: 60px;
            }
            .site-footer {
                margin-left: 0;
            }
            .article-page {
                padding: 24px 20px 48px;
            }
            .breadcrumb .current {
                max-width: 200px;
            }
        }

        @media (max-width: 767.98px) {
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .post-nav {
                flex-direction: column;
                gap: 12px;
            }
            .article-header h1 {
                font-size: 24px;
            }
            .article-content {
                font-size: 15px;
                line-height: 1.85;
            }
            .article-content h2 {
                font-size: 20px;
            }
            .article-meta {
                gap: 12px;
                font-size: 13px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                text-align: center;
                padding-bottom: 32px;
            }
            .footer-brand p {
                margin-left: auto;
                margin-right: auto;
            }
            .footer-divider {
                justify-content: center;
                text-align: center;
            }
            .footer-brand h3 {
                font-size: 22px;
            }
        }

        @media (max-width: 519.98px) {
            .article-page {
                padding: 20px 16px 40px;
            }
            .breadcrumb {
                font-size: 12px;
                margin-bottom: 24px;
            }
            .article-header h1 {
                font-size: 21px;
            }
            .article-content {
                font-size: 15px;
            }
            .article-content h2 {
                font-size: 19px;
            }
            .article-content h3 {
                font-size: 17px;
            }
            .footer-main {
                padding: 0 20px;
            }
        }

/* roulang page: category1 */
/* ============ Design Tokens ============ */
        :root {
            --primary: #4A90D9;
            --primary-dark: #3B7BC4;
            --ink: #2C3E50;
            --body: #333333;
            --muted: #8A8F99;
            --bg: #F5F7FA;
            --bg-light: #EBF2F8;
            --bg-blue: #F0F6FC;
            --white: #FFFFFF;
            --border: #E6EAF0;
            --border-light: #F0F2F5;
            --gold: #C9A063;
            --green: #3BA272;
            --radius-card: 12px;
            --radius-btn: 6px;
            --radius-tag: 4px;
            --shadow-sm: 0 2px 12px rgba(44, 62, 80, 0.08);
            --shadow-hover: 0 6px 20px rgba(44, 62, 80, 0.12);
            --shadow-btn: 0 2px 6px rgba(74, 144, 217, 0.25);
            --sidebar-w: 240px;
            --font-stack: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", "Source Han Sans SC", sans-serif;
        }

        /* ============ Reset & Base ============ */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-stack);
            font-size: 15px;
            line-height: 1.7;
            color: var(--body);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--primary-dark);
        }
        ul {
            list-style: none;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* ============ App Shell ============ */
        .app-shell {
            display: flex;
            min-height: 100vh;
            background: var(--bg);
        }
        .sidebar {
            width: var(--sidebar-w);
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            background: var(--white);
            border-right: 1px solid var(--border);
            z-index: 100;
            display: flex;
            flex-direction: column;
        }
        .sidebar-inner {
            display: flex;
            flex-direction: column;
            height: 100%;
            padding: 24px 20px;
            overflow-y: auto;
        }
        .brand-block {
            padding-bottom: 20px;
            margin-bottom: 20px;
            border-bottom: 1px solid var(--border-light);
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: var(--white);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 17px;
            letter-spacing: 1px;
            flex-shrink: 0;
        }
        .brand-text {
            font-size: 18px;
            font-weight: 600;
            color: var(--ink);
            letter-spacing: 0.5px;
        }
        .brand-sub {
            font-size: 11px;
            color: var(--muted);
            letter-spacing: 3px;
            margin-top: 4px;
            margin-left: 48px;
            text-transform: uppercase;
        }

        /* ============ Sidebar Nav ============ */
        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            flex: 1;
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: 8px;
            color: #4A4A4A;
            text-decoration: none;
            font-size: 15px;
            transition: all 0.2s ease;
            border-left: 3px solid transparent;
            position: relative;
        }
        .nav-item i {
            color: var(--muted);
            font-size: 17px;
            width: 22px;
            text-align: center;
            transition: color 0.2s ease;
        }
        .nav-item:hover {
            background: var(--bg-light);
            color: var(--ink);
        }
        .nav-item:hover i {
            color: var(--primary);
        }
        .nav-item.active {
            background: var(--bg-blue);
            color: var(--primary);
            border-left-color: var(--primary);
            font-weight: 600;
        }
        .nav-item.active i {
            color: var(--primary);
        }

        /* ============ Sidebar Badge ============ */
        .sidebar-badge {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 14px 16px;
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 16px;
        }
        .sidebar-badge i {
            color: var(--primary);
            font-size: 20px;
            flex-shrink: 0;
        }
        .sidebar-badge .badge-text {
            display: flex;
            flex-direction: column;
        }
        .sidebar-badge strong {
            font-size: 13px;
            color: var(--ink);
            font-weight: 600;
        }
        .sidebar-badge span {
            font-size: 12px;
            color: var(--muted);
            line-height: 1.4;
        }

        /* ============ Main Wrap ============ */
        .main-wrap {
            flex: 1;
            margin-left: var(--sidebar-w);
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }
        .page-content {
            flex: 1;
        }

        /* ============ Mobile Header ============ */
        .mobile-header {
            display: none;
            height: 60px;
            background: var(--white);
            border-bottom: 1px solid var(--border);
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 99;
            box-shadow: 0 2px 8px rgba(44, 62, 80, 0.06);
        }
        .menu-toggle {
            background: none;
            border: none;
            font-size: 20px;
            color: var(--ink);
            cursor: pointer;
            padding: 8px;
            border-radius: 6px;
            transition: background 0.2s;
        }
        .menu-toggle:hover {
            background: var(--bg-light);
        }
        .mobile-brand {
            font-size: 15px;
            font-weight: 600;
            color: var(--ink);
            text-decoration: none;
            letter-spacing: 0.5px;
        }
        .mobile-btn {
            background: var(--primary);
            color: var(--white);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 18px;
            border-radius: 20px;
            text-decoration: none;
            transition: background 0.2s;
        }
        .mobile-btn:hover {
            background: var(--primary-dark);
            color: var(--white);
        }

        /* ============ Drawer ============ */
        .drawer-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(44, 62, 80, 0.4);
            z-index: 199;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .drawer-overlay.show {
            display: block;
            opacity: 1;
        }
        .drawer-menu {
            display: block;
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 260px;
            background: var(--white);
            z-index: 200;
            padding: 24px 20px;
            transform: translateX(-100%);
            transition: transform 0.3s ease;
            box-shadow: 4px 0 20px rgba(44, 62, 80, 0.1);
        }
        .drawer-menu.open {
            transform: translateX(0);
        }
        .drawer-menu .nav-item {
            padding: 14px 16px;
        }
        .drawer-brand {
            font-size: 18px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        /* ============ Container & Section ============ */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 32px;
        }
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--white);
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.4;
            margin-bottom: 12px;
        }
        .section-subtitle {
            font-size: 14px;
            color: var(--muted);
            max-width: 660px;
            line-height: 1.7;
        }
        .section-header {
            margin-bottom: 48px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .section-header.center {
            align-items: center;
            text-align: center;
        }
        .section-header.center .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }
        .eyebrow {
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 3px;
            text-transform: uppercase;
            color: var(--primary);
            margin-bottom: 4px;
        }

        /* ============ Page Hero ============ */
        .page-hero {
            background: var(--bg-light);
            padding: 64px 0 56px;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border);
        }
        .page-hero::before {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            width: 40%;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.15;
            z-index: 0;
        }
        .page-hero::after {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            width: 40%;
            background: linear-gradient(90deg, var(--bg-light) 0%, rgba(235, 242, 248, 0.9) 40%, rgba(235, 242, 248, 0.6) 100%);
            z-index: 0;
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--muted);
            margin-bottom: 16px;
        }
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        .breadcrumb .sep {
            color: #C0C6CC;
        }
        .breadcrumb .current {
            color: var(--ink);
            font-weight: 500;
        }
        .page-hero h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.35;
            margin-bottom: 14px;
            letter-spacing: -0.3px;
        }
        .page-hero .hero-desc {
            font-size: 15px;
            color: #4A4A4A;
            line-height: 1.8;
            max-width: 640px;
        }

        /* ============ Buttons ============ */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 44px;
            padding: 0 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            text-decoration: none;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--white);
            border-color: var(--primary);
            box-shadow: var(--shadow-btn);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: var(--white);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(74, 144, 217, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 4px rgba(74, 144, 217, 0.2);
        }
        .btn-secondary {
            background: var(--white);
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-secondary:hover {
            background: var(--bg-light);
            color: var(--ink);
            border-color: var(--ink);
        }
        .btn-lg {
            height: 52px;
            padding: 0 36px;
            font-size: 16px;
        }
        .btn-sm {
            height: 38px;
            padding: 0 20px;
            font-size: 13px;
        }
        .btn-block {
            display: flex;
            width: 100%;
        }
        .btn .fa,
        .btn i {
            font-size: 15px;
        }

        /* ============ Access Steps ============ */
        .steps-section {
            padding: 80px 0;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 24px;
            position: relative;
            margin-top: 8px;
        }
        .step-item {
            background: var(--white);
            border-radius: var(--radius-card);
            padding: 32px 24px 24px;
            box-shadow: var(--shadow-sm);
            position: relative;
            transition: transform 0.25s ease, box-shadow 0.25s ease;
            border-top: 3px solid transparent;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-top-color: var(--primary);
        }
        .step-number {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            opacity: 0.25;
            line-height: 1;
            margin-bottom: 16px;
            font-style: italic;
        }
        .step-item h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .step-item p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
        }
        .step-connector {
            display: none;
        }

        /* ============ Split Row ============ */
        .split-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
        }
        .split-row.reverse {
            direction: rtl;
        }
        .split-row.reverse>* {
            direction: ltr;
        }
        .split-text h3 {
            font-size: 22px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 16px;
            line-height: 1.4;
        }
        .split-text p {
            font-size: 15px;
            color: var(--body);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .split-image {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .split-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
            border-radius: var(--radius-card);
        }
        .split-image::after {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-card);
            pointer-events: none;
        }

        /* ============ Check List ============ */
        .check-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 8px;
        }
        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--body);
            line-height: 1.7;
            padding: 12px 16px;
            background: var(--bg);
            border-radius: 8px;
            border: 1px solid var(--border-light);
            transition: background 0.2s, border-color 0.2s;
        }
        .check-list li:hover {
            background: var(--bg-blue);
            border-color: rgba(74, 144, 217, 0.25);
        }
        .check-list li i {
            color: var(--primary);
            font-size: 14px;
            margin-top: 5px;
            flex-shrink: 0;
        }
        .check-list li strong {
            color: var(--ink);
            font-weight: 600;
        }

        /* ============ Notice Grid ============ */
        .notice-section {
            background: var(--white);
            padding: 80px 0;
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .notice-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .notice-card {
            display: flex;
            gap: 18px;
            padding: 28px;
            background: var(--bg);
            border-radius: var(--radius-card);
            transition: box-shadow 0.25s, transform 0.25s;
            border: 1px solid transparent;
        }
        .notice-card:hover {
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
            border-color: var(--border);
        }
        .notice-icon {
            width: 48px;
            height: 48px;
            background: var(--bg-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            color: var(--primary);
            font-size: 20px;
        }
        .notice-card h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 6px;
        }
        .notice-card p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            margin: 0;
        }

        /* ============ CTA Section ============ */
        .cta-section {
            padding: 60px 0;
        }
        .cta-card {
            background: var(--white);
            border-radius: var(--radius-card);
            padding: 48px 56px;
            box-shadow: var(--shadow-sm);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            position: relative;
            overflow: hidden;
            border: 1px solid var(--border-light);
        }
        .cta-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--primary);
            border-radius: 0 4px 4px 0;
        }
        .cta-info h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--ink);
            margin-bottom: 8px;
        }
        .cta-info p {
            font-size: 14px;
            color: var(--muted);
            margin: 0;
            line-height: 1.7;
            max-width: 480px;
        }
        .cta-action {
            flex-shrink: 0;
        }

        /* ============ FAQ ============ */
        .faq-section {
            padding: 80px 0;
        }
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .accordion {
            background: transparent;
            border: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .accordion-item {
            background: var(--white);
            border-radius: 10px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: box-shadow 0.25s;
        }
        .accordion-item:hover {
            box-shadow: var(--shadow-hover);
        }
        .accordion-item.is-active {
            box-shadow: var(--shadow-hover);
            border-color: rgba(74, 144, 217, 0.25);
        }
        .accordion-title {
            background: var(--white);
            border: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            color: var(--ink) !important;
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            border-radius: 10px;
            cursor: pointer;
            transition: background 0.2s;
            text-decoration: none !important;
        }
        .accordion-title:hover,
        .accordion-title:focus {
            background: var(--bg-blue);
            color: var(--primary) !important;
        }
        .accordion-title::before {
            content: none;
        }
        .accordion-title .icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            color: var(--primary);
            font-size: 13px;
            transition: all 0.25s ease;
        }
        .accordion-item.is-active .accordion-title .icon {
            background: var(--primary);
            color: var(--white);
            transform: rotate(45deg);
        }
        .accordion-content {
            border-top: 1px solid var(--border-light);
            background: #F9FBFD;
            padding: 20px 24px;
            font-size: 14px;
            color: var(--muted);
            line-height: 1.8;
        }
        .accordion-content p {
            margin: 0;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--ink);
            color: #B8C2CE;
            padding: 56px 40px 16px;
            width: 100%;
        }
        .footer-main {
            max-width: 1200px;
            margin: 0 auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 26px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 12px;
            letter-spacing: 1px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #9BA7B4;
            margin-bottom: 16px;
            max-width: 360px;
        }
        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(201, 160, 99, 0.15);
            color: var(--gold);
            padding: 6px 14px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.5px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 16px;
            letter-spacing: 1px;
        }
        .footer-col a {
            display: block;
            color: #9BA7B4;
            font-size: 14px;
            padding: 4px 0;
            transition: color 0.2s, padding-left 0.2s;
        }
        .footer-col a:hover {
            color: #7AB0E6;
            padding-left: 4px;
        }
        .footer-divider {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid #3A4A5E;
            padding: 20px 0;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-copy {
            font-size: 13px;
            color: #8894A0;
        }
        .footer-domain {
            font-size: 13px;
            color: #6B7885;
            font-family: "SF Mono", "Consolas", monospace;
            letter-spacing: 0.5px;
        }
        .footer-note {
            text-align: center;
            font-size: 12px;
            color: #6B7885;
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            margin-top: 0;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            margin-bottom: 8px;
        }

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .sidebar {
                display: none;
            }
            .main-wrap {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
            .container {
                padding: 0 20px;
            }
            .page-hero {
                padding: 48px 0 40px;
            }
            .page-hero h1 {
                font-size: 28px;
            }
            .section {
                padding: 64px 0;
            }
            .section-title {
                font-size: 24px;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .split-row {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .split-row.reverse {
                direction: ltr;
            }
            .split-image img {
                aspect-ratio: 16/10;
            }
            .notice-grid {
                grid-template-columns: 1fr;
            }
            .cta-card {
                flex-direction: column;
                padding: 40px 32px;
                text-align: center;
                gap: 24px;
            }
            .cta-card::before {
                width: 100%;
                height: 4px;
                top: 0;
                left: 0;
                border-radius: 0 0 4px 4px;
            }
            .cta-info p {
                margin: 0 auto;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .site-footer {
                padding: 48px 20px 16px;
            }
        }
        @media (max-width: 640px) {
            .page-hero h1 {
                font-size: 24px;
            }
            .page-hero .hero-desc {
                font-size: 14px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 22px;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .step-item {
                padding: 24px 20px;
            }
            .container {
                padding: 0 16px;
            }
            .crumb-arrow {
                display: none;
            }
            .notice-card {
                padding: 20px;
                flex-direction: column;
                gap: 12px;
            }
            .cta-card {
                padding: 32px 20px;
            }
            .cta-action .btn {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                text-align: center;
            }
            .footer-brand p {
                margin-left: auto;
                margin-right: auto;
            }
            .footer-divider {
                flex-direction: column;
                text-align: center;
            }
            .footer-note {
                padding-top: 12px;
                line-height: 1.6;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #4A90D9;
            --primary-dark: #3B7BC4;
            --primary-light: #EBF2F8;
            --ink: #2C3E50;
            --body: #333333;
            --muted: #8A8F99;
            --bg: #F5F7FA;
            --white: #FFFFFF;
            --gold: #C9A063;
            --gold-light: #F5EBDD;
            --line: #E6EAF0;
            --line-light: #F0F2F5;
            --radius-lg: 12px;
            --radius-md: 8px;
            --radius-sm: 4px;
            --shadow-card: 0 2px 12px rgba(44, 62, 80, 0.08);
            --shadow-hover: 0 6px 20px rgba(44, 62, 80, 0.12);
            --shadow-btn: 0 2px 6px rgba(74, 144, 217, 0.25);
            --font-stack: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Helvetica Neue", Arial, sans-serif;
        }

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

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

        body {
            font-family: var(--font-stack);
            background: var(--bg);
            color: var(--body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: var(--primary);
            transition: color 0.2s ease;
        }

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

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

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

        /* ===== 左侧导航栏 ===== */
        .app-shell {
            display: flex;
            min-height: 100vh;
        }

        .sidebar {
            width: 240px;
            flex-shrink: 0;
            background: var(--white);
            border-right: 1px solid var(--line);
            position: fixed;
            top: 0;
            bottom: 0;
            left: 0;
            z-index: 100;
            display: flex;
            flex-direction: column;
            padding: 0;
        }

        .sidebar-brand {
            padding: 28px 20px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            border-bottom: 1px solid var(--line-light);
        }

        .brand-logo {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            font-size: 20px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .brand-text {
            flex: 1;
        }

        .brand-name {
            font-size: 18px;
            font-weight: 600;
            color: var(--ink);
            line-height: 1.3;
        }

        .brand-tagline {
            font-size: 11px;
            color: var(--muted);
            letter-spacing: 2px;
            text-transform: uppercase;
            margin-top: 2px;
        }

        .sidebar-nav {
            flex: 1;
            padding: 20px 0;
            overflow-y: auto;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 13px 20px;
            color: var(--body);
            font-size: 15px;
            border-left: 3px solid transparent;
            transition: all 0.2s ease;
            position: relative;
        }

        .nav-item i {
            font-size: 17px;
            width: 22px;
            text-align: center;
            color: var(--muted);
            transition: color 0.2s ease;
        }

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

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

        .nav-item.active {
            border-left-color: var(--primary);
            color: var(--primary);
            background: rgba(74, 144, 217, 0.06);
        }

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

        .sidebar-cert {
            margin: 0 16px 20px;
            background: var(--white);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 16px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .cert-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--gold-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--gold);
            font-size: 15px;
            flex-shrink: 0;
        }

        .cert-text {
            font-size: 12px;
            color: var(--body);
            line-height: 1.5;
        }

        .cert-text strong {
            display: block;
            font-weight: 600;
            color: var(--ink);
        }

        /* ===== 主内容区 ===== */
        .main-content {
            flex: 1;
            margin-left: 240px;
            min-width: 0;
        }

        .mobile-topbar {
            display: none;
        }

        /* ===== 页头横幅 ===== */
        .cat-banner {
            background: linear-gradient(135deg, var(--primary-light) 0%, var(--bg) 100%);
            padding: 64px 0 56px;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--line);
        }

        .cat-banner::before {
            content: "";
            position: absolute;
            right: -60px;
            top: -60px;
            width: 420px;
            height: 420px;
            background: url('/assets/images/backpic/back-1.png') no-repeat center/cover;
            opacity: 0.12;
            border-radius: 50%;
        }

        .cat-banner-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            position: relative;
            z-index: 2;
            flex-wrap: wrap;
        }

        .cat-banner-text {
            flex: 1;
            min-width: 280px;
        }

        .cat-breadcrumb {
            font-size: 13px;
            color: var(--muted);
            margin-bottom: 12px;
        }

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

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

        .cat-banner h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .cat-banner-desc {
            font-size: 15px;
            color: var(--body);
            line-height: 1.8;
            max-width: 640px;
        }

        .cat-banner-img {
            width: 300px;
            flex-shrink: 0;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            border: 4px solid var(--white);
        }

        .cat-banner-img img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
        }

        /* ===== 分类内容区 ===== */
        .cat-main {
            background: var(--white);
            padding: 72px 0;
        }

        .cat-main .container {
            max-width: 1080px;
        }

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

        .section-eyebrow {
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 3px;
            text-transform: uppercase;
            margin-bottom: 8px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .section-eyebrow::before {
            content: "";
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--ink);
            line-height: 1.4;
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 15px;
            color: var(--muted);
            max-width: 700px;
            line-height: 1.8;
        }

        /* 四象限安全检测 */
        .security-matrix {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            margin-top: 20px;
        }

        .security-cell {
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: all 0.25s ease;
        }

        .security-cell:hover {
            background: var(--white);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: rgba(74, 144, 217, 0.3);
        }

        .security-cell-icon {
            width: 48px;
            height: 48px;
            background: var(--primary-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 20px;
            margin-bottom: 18px;
        }

        .security-cell h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 10px;
        }

        .security-cell p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.75;
        }

        /* 流程步骤 */
        .flow-section {
            background: var(--primary-light);
            padding: 72px 0;
        }

        .flow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 36px;
            position: relative;
        }

        .flow-steps::before {
            content: "";
            position: absolute;
            top: 32px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: rgba(74, 144, 217, 0.2);
            z-index: 1;
        }

        .flow-step {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-card);
            position: relative;
            z-index: 2;
            transition: all 0.25s ease;
        }

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

        .step-num {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--white);
            font-size: 22px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            box-shadow: var(--shadow-btn);
        }

        .flow-step:nth-child(2) .step-num {
            background: #5B9BD5;
        }

        .flow-step:nth-child(3) .step-num {
            background: #6BA5D9;
        }

        .flow-step:nth-child(4) .step-num {
            background: #7FB0DE;
        }

        .flow-step h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 10px;
        }

        .flow-step p {
            font-size: 13px;
            color: var(--muted);
            line-height: 1.7;
        }

        /* 资质数据 */
        .stats-section {
            padding: 72px 0;
            background: var(--white);
        }

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

        .stat-item {
            padding: 28px 16px;
            border-radius: var(--radius-lg);
            background: var(--bg);
            border: 1px solid var(--line);
        }

        .stat-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 13px;
            color: var(--muted);
        }

        /* CTA卡片 */
        .cta-card-section {
            padding: 24px 0 72px;
            background: var(--white);
        }

        .cta-card {
            background: var(--bg);
            border: 1px solid var(--line);
            border-radius: var(--radius-lg);
            padding: 40px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-card);
        }

        .cta-text {
            flex: 1;
            min-width: 260px;
        }

        .cta-text h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 10px;
        }

        .cta-text p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.7;
            max-width: 520px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            height: 52px;
            padding: 0 32px;
            background: var(--primary);
            color: var(--white);
            border: 1px solid var(--primary-dark);
            border-radius: 6px;
            font-size: 16px;
            font-weight: 600;
            box-shadow: var(--shadow-btn);
            transition: all 0.2s ease;
            cursor: pointer;
            flex-shrink: 0;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: var(--white);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(74, 144, 217, 0.35);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(74, 144, 217, 0.2);
        }

        .btn-primary:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

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

        .faq-list {
            max-width: 820px;
            margin: 40px auto 0;
        }

        .accordion-item {
            background: var(--white);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            box-shadow: var(--shadow-card);
            overflow: hidden;
            border: 1px solid var(--line);
            transition: box-shadow 0.25s ease;
        }

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

        .accordion-item.open {
            border-color: rgba(74, 144, 217, 0.35);
        }

        .accordion-header {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            background: var(--white);
            border: none;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--ink);
            font-family: var(--font-stack);
            text-align: left;
            transition: color 0.2s ease;
        }

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

        .accordion-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 15px;
            flex-shrink: 0;
            transition: transform 0.3s ease, background 0.2s ease, color 0.2s ease;
        }

        .accordion-item.open .accordion-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: var(--white);
        }

        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .accordion-inner {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--muted);
            line-height: 1.8;
            border-top: 1px solid var(--line-light);
            padding-top: 16px;
        }

        /* Footer */
        .site-footer {
            background: var(--ink);
            color: rgba(255, 255, 255, 0.85);
            margin-left: 240px;
            border-radius: 0;
            box-shadow: none;
        }

        .footer-main {
            max-width: 1200px;
            margin: 0 auto;
            padding: 56px 40px 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 36px;
        }

        .footer-brand h3 {
            font-size: 26px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 14px;
        }

        .footer-brand p {
            font-size: 13px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.65);
            max-width: 340px;
            margin-bottom: 16px;
        }

        .footer-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(201, 160, 99, 0.15);
            color: var(--gold);
            border: 1px solid rgba(201, 160, 99, 0.4);
            border-radius: 999px;
            padding: 6px 14px;
            font-size: 12px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .footer-col a {
            display: block;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 12px;
            transition: color 0.2s ease;
        }

        .footer-col a:hover {
            color: #7AB0E6;
        }

        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }

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

        .footer-domain {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-note {
            text-align: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.35);
            padding: 16px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        /* ===== 移动端适配 ===== */
        @media screen and (max-width: 1024px) {
            .sidebar {
                display: none;
            }

            .main-content {
                margin-left: 0;
            }

            .site-footer {
                margin-left: 0;
            }

            .mobile-topbar {
                display: flex;
                align-items: center;
                justify-content: space-between;
                height: 60px;
                background: var(--white);
                padding: 0 16px;
                border-bottom: 1px solid var(--line);
                position: sticky;
                top: 0;
                z-index: 90;
                box-shadow: 0 1px 4px rgba(44, 62, 80, 0.05);
            }

            .mob-brand {
                font-size: 15px;
                font-weight: 600;
                color: var(--ink);
                flex: 1;
                text-align: center;
            }

            .mob-menu-btn {
                width: 40px;
                height: 40px;
                background: none;
                border: none;
                color: var(--ink);
                font-size: 20px;
                cursor: pointer;
                border-radius: var(--radius-sm);
                display: flex;
                align-items: center;
                justify-content: center;
            }

            .mob-menu-btn:hover {
                background: var(--primary-light);
            }

            .mob-cta {
                height: 36px;
                padding: 0 16px;
                background: var(--primary);
                color: var(--white);
                border-radius: 6px;
                border: none;
                font-size: 13px;
                font-weight: 600;
                cursor: pointer;
                transition: background 0.2s ease;
            }

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

            .mob-drawer {
                position: fixed;
                top: 0;
                left: -280px;
                width: 280px;
                height: 100vh;
                background: var(--white);
                z-index: 200;
                transition: left 0.3s ease;
                box-shadow: 2px 0 20px rgba(44, 62, 80, 0.1);
                padding: 24px 0;
            }

            .mob-drawer.open {
                left: 0;
            }

            .drawer-brand {
                padding: 0 24px 20px;
                border-bottom: 1px solid var(--line-light);
                display: flex;
                align-items: center;
                gap: 12px;
                margin-bottom: 16px;
            }

            .drawer-nav {
                padding: 0 0 20px;
            }

            .drawer-nav .nav-item {
                padding: 13px 24px;
            }

            .drawer-overlay {
                position: fixed;
                inset: 0;
                background: rgba(44, 62, 80, 0.4);
                z-index: 190;
                display: none;
            }

            .drawer-overlay.show {
                display: block;
            }

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

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

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

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

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

            .footer-brand p {
                margin-left: auto;
                margin-right: auto;
            }

            .footer-col a {
                display: inline-block;
                margin: 0 12px 12px;
            }

            .footer-divider {
                justify-content: center;
                text-align: center;
            }
        }

        @media screen and (max-width: 768px) {
            .cat-banner-inner {
                padding: 0 20px;
                flex-direction: column;
            }

            .cat-banner-img {
                width: 100%;
                max-width: 420px;
            }

            .cat-banner h1 {
                font-size: 26px;
            }

            .cat-banner-desc {
                font-size: 14px;
            }

            .security-matrix {
                grid-template-columns: 1fr;
            }

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

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

            .cta-card {
                padding: 32px 24px;
                flex-direction: column;
                text-align: center;
            }

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

            .footer-main {
                padding: 40px 20px 20px;
            }
        }

        @media screen and (max-width: 520px) {
            .cat-banner {
                padding: 44px 0 40px;
            }

            .section-title {
                font-size: 22px;
            }

            .section-desc {
                font-size: 14px;
            }

            .security-cell {
                padding: 22px 20px;
            }

            .accordion-header {
                padding: 16px 16px;
                font-size: 14px;
            }

            .accordion-inner {
                padding: 0 16px 16px;
                font-size: 13px;
            }

            .cat-banner-inner {
                padding: 0 16px;
            }

            .cat-breadcrumb {
                font-size: 12px;
            }
        }