/* roulang page: index */
:root {
            --qtan-primary: #10b981;
            --qtan-primary-dark: #059669;
            --qtan-primary-light: #34d399;
            --qtan-accent: #f59e0b;
            --qtan-accent-dark: #d97706;
            --qtan-bg: #f8fafc;
            --qtan-surface: #ffffff;
            --qtan-text: #0f172a;
            --qtan-text-secondary: #475569;
            --qtan-text-muted: #94a3b8;
            --qtan-border: #e2e8f0;
            --qtan-border-light: #f1f5f9;
            --qtan-radius-sm: 8px;
            --qtan-radius-md: 14px;
            --qtan-radius-lg: 22px;
            --qtan-radius-xl: 30px;
            --qtan-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --qtan-shadow-md: 0 6px 18px rgba(0, 0, 0, 0.07);
            --qtan-shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.1);
            --qtan-shadow-glow: 0 8px 30px rgba(16, 185, 129, 0.18);
            --qtan-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Noto Sans SC', sans-serif;
            background-color: var(--qtan-bg);
            color: var(--qtan-text);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a:focus-visible {
            outline: 3px solid rgba(16, 185, 129, 0.5);
            outline-offset: 3px;
            border-radius: 6px;
        }

        img {
            max-width: 100%;
            display: block;
            border-radius: var(--qtan-radius-md);
        }

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

        .qtan-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        @media (min-width: 1400px) {
            .qtan-container {
                max-width: 1280px;
            }
        }

        .qtan-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--qtan-border-light);
            transition: box-shadow var(--qtan-transition);
        }

        .qtan-header.scrolled {
            box-shadow: var(--qtan-shadow-md);
        }

        .qtan-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: 68px;
        }

        .qtan-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--qtan-text);
            letter-spacing: -0.5px;
        }

        .qtan-logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
            box-shadow: var(--qtan-shadow-glow);
        }

        .qtan-logo-text {
            white-space: nowrap;
        }

        .qtan-logo-text small {
            display: block;
            font-size: 0.6rem;
            font-weight: 500;
            color: var(--qtan-text-muted);
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .qtan-nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: wrap;
        }

        .qtan-nav-links li a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 20px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--qtan-text-secondary);
            white-space: nowrap;
            transition: all var(--qtan-transition);
            position: relative;
        }

        .qtan-nav-links li a:hover {
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.08);
        }

        .qtan-nav-links li a.active {
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.12);
            font-weight: 700;
        }

        .qtan-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 3px;
            border-radius: 2px;
            background: var(--qtan-primary);
        }

        .qtan-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            color: #fff !important;
            font-weight: 700;
            font-size: 0.875rem;
            border-radius: 24px;
            border: none;
            white-space: nowrap;
            transition: all var(--qtan-transition);
            box-shadow: var(--qtan-shadow-glow);
            cursor: pointer;
        }

        .qtan-nav-cta:hover {
            background: linear-gradient(135deg, var(--qtan-primary-dark), #047857);
            box-shadow: 0 12px 32px rgba(16, 185, 129, 0.3);
            transform: translateY(-1px);
        }

        .qtan-nav-cta:active {
            transform: translateY(0);
            box-shadow: var(--qtan-shadow-sm);
        }

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

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

        .qtan-mobile-menu {
            display: none;
            flex-direction: column;
            background: #fff;
            border-bottom: 1px solid var(--qtan-border-light);
            padding: 16px 20px;
            gap: 8px;
            box-shadow: var(--qtan-shadow-md);
        }

        .qtan-mobile-menu a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 16px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--qtan-text-secondary);
            transition: all var(--qtan-transition);
        }

        .qtan-mobile-menu a:hover,
        .qtan-mobile-menu a.active {
            background: rgba(16, 185, 129, 0.08);
            color: var(--qtan-primary);
        }

        .qtan-mobile-menu .qtan-nav-cta {
            justify-content: center;
            margin-top: 8px;
        }

        .qtan-section {
            padding: 64px 20px;
            position: relative;
        }

        @media (max-width: 768px) {
            .qtan-section {
                padding: 40px 16px;
            }
        }

        .qtan-section-title {
            font-size: 1.75rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            color: var(--qtan-text);
            line-height: 1.3;
        }

        .qtan-section-desc {
            font-size: 0.95rem;
            color: var(--qtan-text-secondary);
            max-width: 720px;
            line-height: 1.8;
        }

        .qtan-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            background: rgba(16, 185, 129, 0.1);
            color: var(--qtan-primary);
        }

        .qtan-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 0.9rem;
            font-weight: 700;
            border-radius: 12px;
            border: none;
            cursor: pointer;
            transition: all var(--qtan-transition);
            text-decoration: none;
            white-space: nowrap;
        }

        .qtan-btn-primary {
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            color: #fff;
            box-shadow: var(--qtan-shadow-glow);
        }

        .qtan-btn-primary:hover {
            box-shadow: 0 14px 36px rgba(16, 185, 129, 0.32);
            transform: translateY(-2px);
        }

        .qtan-btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--qtan-shadow-sm);
        }

        .qtan-btn-outline {
            background: transparent;
            color: var(--qtan-text);
            border: 2px solid var(--qtan-border);
        }

        .qtan-btn-outline:hover {
            border-color: var(--qtan-primary);
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.04);
        }

        .qtan-btn-accent {
            background: linear-gradient(135deg, var(--qtan-accent), var(--qtan-accent-dark));
            color: #fff;
            box-shadow: 0 8px 28px rgba(245, 158, 11, 0.25);
        }

        .qtan-btn-accent:hover {
            box-shadow: 0 14px 36px rgba(245, 158, 11, 0.38);
            transform: translateY(-2px);
        }

        .qtan-card {
            background: var(--qtan-surface);
            border: 1px solid var(--qtan-border-light);
            border-radius: var(--qtan-radius-lg);
            padding: 24px;
            box-shadow: var(--qtan-shadow-sm);
            transition: all var(--qtan-transition);
        }

        .qtan-card:hover {
            box-shadow: var(--qtan-shadow-md);
            border-color: var(--qtan-border);
            transform: translateY(-3px);
        }

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

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

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

        @media (max-width: 1024px) {
            .qtan-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .qtan-grid-2,
            .qtan-grid-3,
            .qtan-grid-4 {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        .qtan-hero {
            background: linear-gradient(180deg, #f0fdf9 0%, #f8fafc 100%);
            border-bottom: 1px solid var(--qtan-border-light);
            padding: 68px 20px 56px;
            position: relative;
            overflow: hidden;
        }

        .qtan-hero::before {
            content: '';
            position: absolute;
            top: -180px;
            right: -120px;
            width: 520px;
            height: 520px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.08) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }

        .qtan-hero::after {
            content: '';
            position: absolute;
            bottom: -160px;
            left: -80px;
            width: 380px;
            height: 380px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.07) 0%, transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }

        .qtan-hero-inner {
            position: relative;
            z-index: 2;
            max-width: 1200px;
            margin: 0 auto;
            text-align: center;
        }

        .qtan-hero-title {
            font-size: 3rem;
            font-weight: 900;
            letter-spacing: -1.5px;
            line-height: 1.2;
            margin: 16px 0 20px;
            color: var(--qtan-text);
        }

        @media (max-width: 768px) {
            .qtan-hero-title {
                font-size: 2rem;
                letter-spacing: -0.5px;
            }
        }

        .qtan-hero-desc {
            font-size: 1.05rem;
            color: var(--qtan-text-secondary);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.9;
            font-weight: 450;
        }

        .qtan-hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }

        .qtan-icon-matrix {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 12px;
            max-width: 780px;
            margin: 28px auto 20px;
        }

        @media (max-width: 768px) {
            .qtan-icon-matrix {
                grid-template-columns: repeat(3, 1fr);
                gap: 10px;
            }
        }

        .qtan-icon-matrix-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 8px;
            padding: 16px 10px;
            background: rgba(255, 255, 255, 0.8);
            border: 1px solid var(--qtan-border-light);
            border-radius: var(--qtan-radius-md);
            transition: all var(--qtan-transition);
            cursor: default;
        }

        .qtan-icon-matrix-item:hover {
            border-color: var(--qtan-primary);
            box-shadow: var(--qtan-shadow-glow);
            transform: translateY(-4px);
        }

        .qtan-icon-matrix-item i {
            font-size: 24px;
            color: var(--qtan-primary);
        }

        .qtan-icon-matrix-item span {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--qtan-text-secondary);
            white-space: nowrap;
        }

        .qtan-status-bar {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 28px;
            flex-wrap: wrap;
            padding: 16px 28px;
            background: rgba(255, 255, 255, 0.85);
            border: 1px solid var(--qtan-border-light);
            border-radius: 40px;
            max-width: 680px;
            margin: 0 auto;
            box-shadow: var(--qtan-shadow-sm);
        }

        .qtan-status-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--qtan-text-secondary);
            white-space: nowrap;
        }

        .qtan-status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--qtan-primary);
            animation: qtan-pulse 2s ease-in-out infinite;
        }

        .qtan-status-dot.accent {
            background: var(--qtan-accent);
        }

        @keyframes qtan-pulse {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.6;
                transform: scale(1.4);
            }
        }

        .qtan-stat-card {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            color: #fff;
            border-radius: var(--qtan-radius-lg);
            padding: 28px;
            text-align: center;
            border: none;
            box-shadow: var(--qtan-shadow-lg);
        }

        .qtan-stat-value {
            font-size: 2.2rem;
            font-weight: 900;
            letter-spacing: -1px;
            line-height: 1.2;
            color: var(--qtan-primary-light);
        }

        .qtan-stat-label {
            font-size: 0.8rem;
            color: #94a3b8;
            font-weight: 600;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-top: 6px;
        }

        .qtan-progress-track {
            width: 100%;
            height: 8px;
            background: #e2e8f0;
            border-radius: 4px;
            overflow: hidden;
        }

        .qtan-progress-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--qtan-primary), var(--qtan-primary-light));
            border-radius: 4px;
            transition: width 0.6s ease;
        }

        .qtan-progress-fill.accent {
            background: linear-gradient(90deg, var(--qtan-accent-dark), var(--qtan-accent));
        }

        .qtan-comparison-card {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .qtan-comparison-row {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 18px;
            border-radius: var(--qtan-radius-md);
            background: var(--qtan-bg);
            border: 1px solid var(--qtan-border-light);
            font-size: 0.88rem;
            font-weight: 600;
            transition: all var(--qtan-transition);
        }

        .qtan-comparison-row:hover {
            border-color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.04);
        }

        .qtan-comparison-row i {
            font-size: 18px;
            flex-shrink: 0;
        }

        .qtan-comparison-row .fa-check-circle {
            color: var(--qtan-primary);
        }

        .qtan-comparison-row .fa-times-circle {
            color: #ef4444;
            opacity: 0.6;
        }

        .qtan-faq-item {
            border: 1px solid var(--qtan-border-light);
            border-radius: var(--qtan-radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--qtan-surface);
            transition: all var(--qtan-transition);
        }

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

        .qtan-faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            font-weight: 700;
            cursor: pointer;
            font-size: 0.95rem;
            background: none;
            border: none;
            text-align: left;
            width: 100%;
            color: var(--qtan-text);
            transition: all var(--qtan-transition);
        }

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

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

        .qtan-faq-item.open .qtan-faq-question i {
            transform: rotate(180deg);
            color: var(--qtan-primary);
        }

        .qtan-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            padding: 0 22px;
            font-size: 0.9rem;
            color: var(--qtan-text-secondary);
            line-height: 1.8;
        }

        .qtan-faq-item.open .qtan-faq-answer {
            max-height: 400px;
            padding: 0 22px 20px;
        }

        .qtan-news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }

        .qtan-news-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 18px 6px;
            border-bottom: 1px solid var(--qtan-border-light);
            transition: all var(--qtan-transition);
            flex-wrap: wrap;
        }

        .qtan-news-item:hover {
            padding-left: 14px;
        }

        .qtan-news-item:last-child {
            border-bottom: none;
        }

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

        .qtan-news-title {
            font-weight: 700;
            font-size: 0.95rem;
            display: block;
            margin-bottom: 4px;
            transition: color var(--qtan-transition);
            line-height: 1.5;
        }

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

        .qtan-news-meta {
            font-size: 0.75rem;
            color: var(--qtan-text-muted);
            display: flex;
            gap: 16px;
            align-items: center;
            flex-wrap: wrap;
        }

        .qtan-news-summary {
            font-size: 0.85rem;
            color: var(--qtan-text-secondary);
            margin-top: 6px;
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .qtan-news-btn {
            flex-shrink: 0;
            font-size: 0.78rem;
            font-weight: 700;
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.08);
            padding: 8px 16px;
            border-radius: 20px;
            transition: all var(--qtan-transition);
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }

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

        .qtan-news-sidebar {
            background: linear-gradient(180deg, #f0fdf9 0%, #f8fafc 100%);
            border-radius: var(--qtan-radius-lg);
            padding: 20px;
            border: 1px solid var(--qtan-border-light);
        }

        .qtan-news-sidebar h4 {
            font-size: 0.9rem;
            font-weight: 800;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .qtan-news-sidebar h4 i {
            color: var(--qtan-primary);
        }

        .qtan-news-sidebar a {
            display: block;
            padding: 10px 0;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--qtan-text-secondary);
            border-bottom: 1px solid var(--qtan-border-light);
            transition: all var(--qtan-transition);
            line-height: 1.5;
        }

        .qtan-news-sidebar a:last-child {
            border-bottom: none;
        }

        .qtan-news-sidebar a:hover {
            color: var(--qtan-primary);
            padding-left: 6px;
        }

        .qtan-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 48px 20px 28px;
            border-top: 4px solid var(--qtan-primary);
        }

        .qtan-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        @media (max-width: 768px) {
            .qtan-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
                padding: 0;
            }
        }

        @media (max-width: 520px) {
            .qtan-footer-grid {
                grid-template-columns: 1fr;
            }
        }

        .qtan-footer-brand {
            font-weight: 800;
            font-size: 1.3rem;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .qtan-footer-desc {
            font-size: 0.82rem;
            line-height: 1.8;
            color: #94a3b8;
            max-width: 300px;
        }

        .qtan-footer h5 {
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .qtan-footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .qtan-footer-links a {
            font-size: 0.82rem;
            color: #94a3b8;
            transition: color var(--qtan-transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .qtan-footer-links a:hover {
            color: var(--qtan-primary-light);
        }

        .qtan-footer-bottom {
            max-width: 1200px;
            margin: 32px auto 0;
            padding: 20px 20px 0;
            border-top: 1px solid rgba(148, 163, 184, 0.2);
            display: flex;
            flex-direction: column;
            gap: 10px;
            font-size: 0.78rem;
            color: #64748b;
        }

        .qtan-footer-bottom-links {
            display: flex;
            gap: 18px;
            flex-wrap: wrap;
        }

        .qtan-footer-bottom-links a {
            color: #64748b;
            transition: color var(--qtan-transition);
        }

        .qtan-footer-bottom-links a:hover {
            color: var(--qtan-primary-light);
        }

        @media (max-width: 768px) {
            .qtan-nav-links {
                display: none;
            }
            .qtan-nav-cta {
                display: none;
            }
            .qtan-mobile-toggle {
                display: flex;
            }
            .qtan-mobile-menu {
                display: flex;
            }
            .qtan-nav {
                height: 60px;
            }
        }

        @media (min-width: 769px) {
            .qtan-mobile-menu {
                display: none !important;
            }
        }

        .qtan-vertical-cards {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        @media (max-width: 1024px) {
            .qtan-vertical-cards {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .qtan-vertical-cards {
                grid-template-columns: 1fr;
            }
        }

        .qtan-vertical-card {
            position: relative;
            border-radius: var(--qtan-radius-lg);
            overflow: hidden;
            aspect-ratio: 3/4.2;
            cursor: pointer;
            transition: all var(--qtan-transition);
            box-shadow: var(--qtan-shadow-md);
            border: 1px solid var(--qtan-border-light);
        }

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

        .qtan-vertical-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
        }

        .qtan-vertical-card-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 28px 18px 16px;
            background: linear-gradient(180deg, transparent 0%, rgba(15, 23, 42, 0.92) 78%);
            color: #fff;
        }

        .qtan-vertical-card-overlay h4 {
            font-size: 1rem;
            font-weight: 800;
            margin-bottom: 6px;
            line-height: 1.35;
        }

        .qtan-vertical-card-overlay p {
            font-size: 0.78rem;
            color: #cbd5e1;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .qtan-vertical-card-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 10px;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--qtan-primary-light);
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            padding: 6px 14px;
            border-radius: 16px;
            transition: all var(--qtan-transition);
        }

        .qtan-vertical-card:hover .qtan-vertical-card-cta {
            background: var(--qtan-primary);
            color: #fff;
        }

        .qtan-screenshot-stage {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 32px;
            align-items: center;
        }

        @media (max-width: 768px) {
            .qtan-screenshot-stage {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        .qtan-screenshot-main {
            border-radius: var(--qtan-radius-xl);
            overflow: hidden;
            box-shadow: var(--qtan-shadow-lg);
            border: 1px solid var(--qtan-border-light);
            position: relative;
        }

        .qtan-screenshot-main img {
            width: 100%;
            height: auto;
            border-radius: 0;
        }

        .qtan-screenshot-thumbs {
            display: grid;
            grid-template-columns: 1fr;
            gap: 12px;
        }

        .qtan-screenshot-thumb {
            border-radius: var(--qtan-radius-md);
            overflow: hidden;
            cursor: pointer;
            border: 2px solid transparent;
            transition: all var(--qtan-transition);
            box-shadow: var(--qtan-shadow-sm);
        }

        .qtan-screenshot-thumb:hover,
        .qtan-screenshot-thumb.active {
            border-color: var(--qtan-primary);
            box-shadow: var(--qtan-shadow-glow);
        }

        .qtan-screenshot-thumb img {
            width: 100%;
            height: auto;
            border-radius: 0;
        }

        .qtan-security-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        @media (max-width: 1024px) {
            .qtan-security-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .qtan-security-grid {
                grid-template-columns: 1fr;
            }
        }

        .qtan-security-item {
            display: flex;
            flex-direction: column;
            gap: 12px;
            padding: 24px;
            background: var(--qtan-surface);
            border: 1px solid var(--qtan-border-light);
            border-radius: var(--qtan-radius-lg);
            box-shadow: var(--qtan-shadow-sm);
            transition: all var(--qtan-transition);
        }

        .qtan-security-item:hover {
            border-color: var(--qtan-primary);
            box-shadow: var(--qtan-shadow-glow);
            transform: translateY(-3px);
        }

        .qtan-security-item i {
            font-size: 28px;
            color: var(--qtan-primary);
        }

        .qtan-security-item h4 {
            font-size: 0.95rem;
            font-weight: 800;
            color: var(--qtan-text);
        }

        .qtan-security-item p {
            font-size: 0.82rem;
            color: var(--qtan-text-secondary);
            line-height: 1.7;
        }

        .qtan-testimonial-card {
            background: var(--qtan-surface);
            border: 1px solid var(--qtan-border-light);
            border-radius: var(--qtan-radius-lg);
            padding: 24px;
            box-shadow: var(--qtan-shadow-sm);
            transition: all var(--qtan-transition);
            position: relative;
        }

        .qtan-testimonial-card:hover {
            box-shadow: var(--qtan-shadow-md);
            border-color: var(--qtan-border);
            transform: translateY(-3px);
        }

        .qtan-testimonial-card .qtan-quote-icon {
            font-size: 36px;
            color: rgba(16, 185, 129, 0.15);
            position: absolute;
            top: 16px;
            right: 20px;
        }

        .qtan-testimonial-card p {
            font-size: 0.88rem;
            color: var(--qtan-text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .qtan-testimonial-author {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.82rem;
            font-weight: 700;
            color: var(--qtan-text);
        }

        .qtan-testimonial-author span {
            color: var(--qtan-text-muted);
            font-weight: 500;
            font-size: 0.75rem;
        }

        .qtan-cta-box {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #134e4a 100%);
            border-radius: var(--qtan-radius-xl);
            padding: 48px 40px;
            color: #fff;
            text-align: center;
            box-shadow: var(--qtan-shadow-lg);
            position: relative;
            overflow: hidden;
        }

        .qtan-cta-box::before {
            content: '';
            position: absolute;
            top: -140px;
            right: -80px;
            width: 380px;
            height: 380px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.2) 0%, transparent 60%);
            border-radius: 50%;
            pointer-events: none;
        }

        .qtan-cta-box h2 {
            font-size: 1.8rem;
            font-weight: 900;
            letter-spacing: -0.5px;
            margin-bottom: 14px;
            position: relative;
            z-index: 2;
        }

        .qtan-cta-box p {
            font-size: 0.95rem;
            color: #cbd5e1;
            max-width: 560px;
            margin: 0 auto 24px;
            line-height: 1.8;
            position: relative;
            z-index: 2;
        }

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

        .qtan-form-input {
            width: 100%;
            padding: 14px 20px;
            border-radius: 12px;
            border: 1px solid var(--qtan-border);
            background: var(--qtan-surface);
            font-size: 0.9rem;
            transition: all var(--qtan-transition);
            outline: none;
            color: var(--qtan-text);
        }

        .qtan-form-input:focus {
            border-color: var(--qtan-primary);
            box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.12);
        }

        .qtan-form-input::placeholder {
            color: var(--qtan-text-muted);
        }

        .qtan-bg-accent-light {
            background: linear-gradient(180deg, #fffbeb 0%, #f8fafc 100%);
        }

        .qtan-bg-dark-section {
            background: #0f172a;
            color: #fff;
        }

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

        .qtan-bg-dark-section .qtan-section-desc {
            color: #94a3b8;
        }

        .qtan-divider {
            height: 1px;
            background: var(--qtan-border-light);
            width: 100%;
        }

        .qtan-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 3px 10px;
            border-radius: 12px;
            font-size: 0.7rem;
            font-weight: 700;
            background: rgba(16, 185, 129, 0.08);
            color: var(--qtan-primary);
            white-space: nowrap;
        }

        .qtan-tag.accent {
            background: rgba(245, 158, 11, 0.1);
            color: var(--qtan-accent-dark);
        }

/* roulang page: category2 */
:root {
            --qtan-primary: #10b981;
            --qtan-primary-dark: #059669;
            --qtan-primary-light: #34d399;
            --qtan-accent: #f59e0b;
            --qtan-accent-dark: #d97706;
            --qtan-bg: #f8fafc;
            --qtan-surface: #ffffff;
            --qtan-text: #0f172a;
            --qtan-text-secondary: #475569;
            --qtan-text-muted: #94a3b8;
            --qtan-border: #e2e8f0;
            --qtan-border-light: #f1f5f9;
            --qtan-radius-sm: 8px;
            --qtan-radius-md: 14px;
            --qtan-radius-lg: 22px;
            --qtan-radius-xl: 30px;
            --qtan-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --qtan-shadow-md: 0 6px 18px rgba(0, 0, 0, 0.07);
            --qtan-shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.1);
            --qtan-shadow-glow: 0 8px 30px rgba(16, 185, 129, 0.18);
            --qtan-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Noto Sans SC', sans-serif;
            background-color: var(--qtan-bg);
            color: var(--qtan-text);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a:focus-visible {
            outline: 3px solid rgba(16, 185, 129, 0.5);
            outline-offset: 3px;
            border-radius: 6px;
        }

        img {
            max-width: 100%;
            display: block;
            border-radius: var(--qtan-radius-md);
        }

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

        .qtan-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .qtan-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--qtan-border-light);
            transition: box-shadow var(--qtan-transition);
        }

        .qtan-header.scrolled {
            box-shadow: var(--qtan-shadow-md);
        }

        .qtan-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: 68px;
        }

        .qtan-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--qtan-text);
            letter-spacing: -0.5px;
        }

        .qtan-logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
            box-shadow: var(--qtan-shadow-glow);
        }

        .qtan-logo-text {
            white-space: nowrap;
        }

        .qtan-logo-text small {
            display: block;
            font-size: 0.6rem;
            font-weight: 500;
            color: var(--qtan-text-muted);
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .qtan-nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: wrap;
        }

        .qtan-nav-links li a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 20px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--qtan-text-secondary);
            white-space: nowrap;
            transition: all var(--qtan-transition);
            position: relative;
        }

        .qtan-nav-links li a:hover {
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.08);
        }

        .qtan-nav-links li a.active {
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.12);
            font-weight: 700;
        }

        .qtan-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 3px;
            border-radius: 2px;
            background: var(--qtan-primary);
        }

        .qtan-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            color: #fff !important;
            font-weight: 700;
            font-size: 0.875rem;
            border-radius: 24px;
            border: none;
            white-space: nowrap;
            transition: all var(--qtan-transition);
            box-shadow: var(--qtan-shadow-glow);
            cursor: pointer;
        }

        .qtan-nav-cta:hover {
            background: linear-gradient(135deg, var(--qtan-primary-dark), #047857);
            box-shadow: 0 12px 32px rgba(16, 185, 129, 0.3);
            transform: translateY(-1px);
        }

        .qtan-nav-cta:active {
            transform: translateY(0);
            box-shadow: var(--qtan-shadow-sm);
        }

        .qtan-mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            background: var(--qtan-surface);
            border: 1px solid var(--qtan-border);
            border-radius: 10px;
            color: var(--qtan-text-secondary);
            font-size: 1.1rem;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all var(--qtan-transition);
        }

        .qtan-mobile-toggle:hover {
            background: var(--qtan-border-light);
            color: var(--qtan-primary);
        }

        .qtan-mobile-menu {
            display: none;
            padding: 12px 20px 20px;
            background: var(--qtan-surface);
            border-top: 1px solid var(--qtan-border-light);
            flex-direction: column;
            gap: 4px;
        }

        .qtan-mobile-menu.open {
            display: flex;
        }

        .qtan-mobile-menu a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 14px;
            border-radius: 10px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--qtan-text-secondary);
            transition: all var(--qtan-transition);
        }

        .qtan-mobile-menu a:hover,
        .qtan-mobile-menu a.active {
            background: rgba(16, 185, 129, 0.1);
            color: var(--qtan-primary);
        }

        .qtan-hero {
            position: relative;
            background: linear-gradient(135deg, #053b2f 0%, #0f766e 40%, #10b981 100%);
            padding: 72px 0 80px;
            overflow: hidden;
            border-radius: 0 0 32px 32px;
        }

        .qtan-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 480px;
            height: 480px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.1), transparent 70%);
            pointer-events: none;
        }

        .qtan-hero::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -60px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.2), transparent 70%);
            pointer-events: none;
        }

        .qtan-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 20px;
            color: #fff;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            backdrop-filter: blur(8px);
        }

        .qtan-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            letter-spacing: -1px;
            margin: 16px 0 12px;
        }

        .qtan-hero-sub {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            line-height: 1.8;
        }

        .qtan-hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-top: 28px;
        }

        .qtan-btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: #fff;
            color: var(--qtan-primary-dark);
            font-weight: 700;
            font-size: 0.95rem;
            border-radius: 26px;
            border: none;
            cursor: pointer;
            transition: all var(--qtan-transition);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
        }

        .qtan-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 34px rgba(0, 0, 0, 0.2);
        }

        .qtan-btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: 26px;
            border: 1px solid rgba(255, 255, 255, 0.3);
            cursor: pointer;
            transition: all var(--qtan-transition);
            backdrop-filter: blur(8px);
        }

        .qtan-btn-secondary:hover {
            background: rgba(255, 255, 255, 0.22);
            border-color: rgba(255, 255, 255, 0.5);
        }

        .qtan-demo-panel {
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.22);
            border-radius: var(--qtan-radius-lg);
            padding: 24px 28px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            margin-top: 32px;
            max-width: 680px;
        }

        .qtan-demo-panel-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 16px;
        }

        .qtan-demo-row {
            display: flex;
            gap: 12px;
            align-items: center;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.85);
            font-size: 0.85rem;
        }

        .qtan-demo-row:last-child {
            border-bottom: none;
        }

        .qtan-demo-status {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            flex-shrink: 0;
        }

        .qtan-demo-status.green {
            background: #34d399;
            box-shadow: 0 0 8px rgba(52, 211, 153, 0.7);
        }

        .qtan-demo-status.yellow {
            background: #fbbf24;
            box-shadow: 0 0 8px rgba(251, 191, 36, 0.7);
        }

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

        .qtan-section-title {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--qtan-text);
            letter-spacing: -0.5px;
            margin-bottom: 8px;
        }

        .qtan-section-sub {
            color: var(--qtan-text-secondary);
            font-size: 1rem;
            max-width: 620px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .qtan-card {
            background: var(--qtan-surface);
            border-radius: var(--qtan-radius-lg);
            border: 1px solid var(--qtan-border-light);
            box-shadow: var(--qtan-shadow-sm);
            transition: all var(--qtan-transition);
            overflow: hidden;
        }

        .qtan-card:hover {
            box-shadow: var(--qtan-shadow-md);
            transform: translateY(-2px);
        }

        .qtan-card-header {
            padding: 18px 22px;
            border-bottom: 1px solid var(--qtan-border-light);
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            color: var(--qtan-text);
            font-size: 1rem;
        }

        .qtan-card-body {
            padding: 18px 22px;
            color: var(--qtan-text-secondary);
            font-size: 0.9rem;
            line-height: 1.75;
        }

        .qtan-badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 4px 12px;
            border-radius: 14px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        .qtan-badge-green {
            background: rgba(16, 185, 129, 0.1);
            color: var(--qtan-primary-dark);
        }

        .qtan-badge-amber {
            background: rgba(245, 158, 11, 0.12);
            color: var(--qtan-accent-dark);
        }

        .qtan-badge-red {
            background: rgba(239, 68, 68, 0.1);
            color: #dc2626;
        }

        .qtan-metric-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .qtan-metric-card {
            background: var(--qtan-surface);
            border-radius: var(--qtan-radius-lg);
            padding: 22px 24px;
            border: 1px solid var(--qtan-border-light);
            box-shadow: var(--qtan-shadow-sm);
            transition: all var(--qtan-transition);
        }

        .qtan-metric-card:hover {
            box-shadow: var(--qtan-shadow-md);
            transform: translateY(-2px);
        }

        .qtan-metric-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--qtan-primary-dark);
            letter-spacing: -1px;
        }

        .qtan-metric-label {
            font-size: 0.83rem;
            color: var(--qtan-text-muted);
            margin-top: 4px;
            font-weight: 500;
        }

        .qtan-service-matrix {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .qtan-service-card {
            background: var(--qtan-surface);
            border-radius: var(--qtan-radius-lg);
            border: 1px solid var(--qtan-border-light);
            box-shadow: var(--qtan-shadow-sm);
            padding: 24px;
            transition: all var(--qtan-transition);
        }

        .qtan-service-card:hover {
            box-shadow: var(--qtan-shadow-lg);
            transform: translateY(-4px);
            border-color: rgba(16, 185, 129, 0.25);
        }

        .qtan-service-icon {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, rgba(16, 185, 129, 0.12), rgba(16, 185, 129, 0.05));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--qtan-primary);
            font-size: 1.3rem;
            margin-bottom: 14px;
        }

        .qtan-service-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--qtan-text);
            margin-bottom: 8px;
        }

        .qtan-service-card p {
            color: var(--qtan-text-secondary);
            font-size: 0.875rem;
            line-height: 1.75;
        }

        .qtan-compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .qtan-compare-panel {
            border-radius: var(--qtan-radius-lg);
            padding: 28px;
            border: 1px solid var(--qtan-border-light);
        }

        .qtan-compare-panel.before {
            background: linear-gradient(135deg, #fef2f2, #fff7ed);
            border-color: #fecaca;
        }

        .qtan-compare-panel.after {
            background: linear-gradient(135deg, #ecfdf5, #f0fdf4);
            border-color: #a7f3d0;
        }

        .qtan-compare-panel h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .qtan-compare-list {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .qtan-compare-list li {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--qtan-text-secondary);
            line-height: 1.65;
        }

        .qtan-compare-list li i {
            flex-shrink: 0;
            margin-top: 4px;
            font-size: 0.85rem;
        }

        .qtan-list-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 14px 0;
            border-bottom: 1px solid var(--qtan-border-light);
            font-size: 0.9rem;
            color: var(--qtan-text-secondary);
            line-height: 1.7;
        }

        .qtan-list-item:last-child {
            border-bottom: none;
        }

        .qtan-list-icon {
            width: 32px;
            height: 32px;
            background: rgba(16, 185, 129, 0.1);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--qtan-primary);
            font-size: 0.85rem;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .qtan-faq-item {
            border-bottom: 1px solid var(--qtan-border-light);
            padding: 0;
        }

        .qtan-faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 0;
            cursor: pointer;
            font-weight: 700;
            font-size: 0.98rem;
            color: var(--qtan-text);
            transition: color var(--qtan-transition);
            gap: 12px;
        }

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

        .qtan-faq-icon {
            flex-shrink: 0;
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: rgba(16, 185, 129, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--qtan-primary);
            font-size: 0.75rem;
            transition: transform var(--qtan-transition);
        }

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

        .qtan-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            color: var(--qtan-text-secondary);
            font-size: 0.9rem;
            line-height: 1.8;
        }

        .qtan-faq-item.open .qtan-faq-answer {
            max-height: 300px;
            padding-bottom: 18px;
        }

        .qtan-form-section {
            background: linear-gradient(135deg, #064e3b 0%, #0f766e 50%, #10b981 100%);
            border-radius: var(--qtan-radius-xl);
            padding: 48px 40px;
            position: relative;
            overflow: hidden;
        }

        .qtan-form-section::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.12), transparent 70%);
        }

        .qtan-form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            position: relative;
            z-index: 1;
        }

        .qtan-form-title {
            color: #fff;
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .qtan-form-desc {
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        .qtan-form-input {
            width: 100%;
            padding: 12px 16px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.3);
            background: rgba(255, 255, 255, 0.14);
            color: #fff;
            font-size: 0.9rem;
            outline: none;
            transition: all var(--qtan-transition);
            margin-bottom: 12px;
            backdrop-filter: blur(8px);
        }

        .qtan-form-input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }

        .qtan-form-input:focus {
            border-color: rgba(255, 255, 255, 0.7);
            background: rgba(255, 255, 255, 0.22);
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.15);
        }

        .qtan-form-submit {
            width: 100%;
            padding: 13px 24px;
            background: #fff;
            color: var(--qtan-primary-dark);
            font-weight: 800;
            font-size: 0.95rem;
            border-radius: 10px;
            border: none;
            cursor: pointer;
            transition: all var(--qtan-transition);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
        }

        .qtan-form-submit:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 34px rgba(0, 0, 0, 0.25);
        }

        .qtan-footer {
            background: var(--qtan-surface);
            border-top: 1px solid var(--qtan-border-light);
            padding: 52px 0 28px;
            margin-top: 32px;
        }

        .qtan-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 28px;
            margin-bottom: 30px;
        }

        .qtan-footer-brand {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--qtan-text);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
        }

        .qtan-footer-desc {
            color: var(--qtan-text-muted);
            font-size: 0.875rem;
            line-height: 1.8;
            max-width: 320px;
        }

        .qtan-footer h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--qtan-text);
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

        .qtan-footer-links {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .qtan-footer-links a {
            color: var(--qtan-text-muted);
            font-size: 0.85rem;
            transition: all var(--qtan-transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .qtan-footer-links a:hover {
            color: var(--qtan-primary);
            transform: translateX(2px);
        }

        .qtan-footer-bottom {
            border-top: 1px solid var(--qtan-border-light);
            padding-top: 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 14px;
            font-size: 0.82rem;
            color: var(--qtan-text-muted);
        }

        .qtan-footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .qtan-footer-bottom a {
            color: var(--qtan-text-muted);
            transition: color var(--qtan-transition);
        }

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

        .qtan-news-card {
            background: var(--qtan-surface);
            border-radius: var(--qtan-radius-md);
            border: 1px solid var(--qtan-border-light);
            box-shadow: var(--qtan-shadow-sm);
            padding: 18px 20px;
            transition: all var(--qtan-transition);
        }

        .qtan-news-card:hover {
            box-shadow: var(--qtan-shadow-md);
            transform: translateY(-2px);
        }

        .qtan-news-date {
            font-size: 0.78rem;
            color: var(--qtan-text-muted);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .qtan-news-card h3 {
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--qtan-text);
            margin-bottom: 6px;
            line-height: 1.5;
        }

        .qtan-news-card p {
            font-size: 0.84rem;
            color: var(--qtan-text-secondary);
            line-height: 1.65;
            margin-bottom: 12px;
        }

        .qtan-news-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--qtan-primary);
            font-weight: 600;
            font-size: 0.82rem;
            transition: all var(--qtan-transition);
        }

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

        .qtan-tag-row {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        @media (max-width: 1024px) {
            .qtan-nav-links {
                display: none;
            }

            .qtan-nav-cta {
                display: none;
            }

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

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

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

            .qtan-hero h1 {
                font-size: 2.2rem;
            }
        }

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

            .qtan-hero h1 {
                font-size: 1.8rem;
            }

            .qtan-hero-sub {
                font-size: 1rem;
            }

            .qtan-section {
                padding: 44px 0;
            }

            .qtan-section-title {
                font-size: 1.5rem;
            }

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

            .qtan-compare-grid {
                grid-template-columns: 1fr;
            }

            .qtan-form-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .qtan-form-section {
                padding: 32px 24px;
            }

            .qtan-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }

            .qtan-footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .qtan-container {
                padding: 0 14px;
            }

            .qtan-hero h1 {
                font-size: 1.5rem;
            }

            .qtan-hero-actions {
                flex-direction: column;
                gap: 10px;
            }

            .qtan-hero-actions a {
                width: 100%;
                justify-content: center;
            }

            .qtan-metric-grid {
                grid-template-columns: 1fr;
            }

            .qtan-metric-value {
                font-size: 1.6rem;
            }

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

            .qtan-demo-panel {
                padding: 16px;
            }
        }

/* roulang page: category3 */
:root {
            --qtan-primary: #10b981;
            --qtan-primary-dark: #059669;
            --qtan-primary-light: #34d399;
            --qtan-accent: #f59e0b;
            --qtan-accent-dark: #d97706;
            --qtan-bg: #f8fafc;
            --qtan-surface: #ffffff;
            --qtan-text: #0f172a;
            --qtan-text-secondary: #475569;
            --qtan-text-muted: #94a3b8;
            --qtan-border: #e2e8f0;
            --qtan-border-light: #f1f5f9;
            --qtan-radius-sm: 8px;
            --qtan-radius-md: 14px;
            --qtan-radius-lg: 22px;
            --qtan-radius-xl: 30px;
            --qtan-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --qtan-shadow-md: 0 6px 18px rgba(0, 0, 0, 0.07);
            --qtan-shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.1);
            --qtan-shadow-glow: 0 8px 30px rgba(16, 185, 129, 0.18);
            --qtan-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Noto Sans SC', sans-serif;
            background-color: var(--qtan-bg);
            color: var(--qtan-text);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--qtan-transition);
        }
        a:focus-visible {
            outline: 3px solid rgba(16, 185, 129, 0.5);
            outline-offset: 3px;
            border-radius: 6px;
        }
        img {
            max-width: 100%;
            display: block;
            border-radius: var(--qtan-radius-md);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        .qtan-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        @media(min-width:1280px) {
            .qtan-container {
                max-width: 1280px;
            }
        }
        .qtan-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--qtan-border-light);
            transition: box-shadow var(--qtan-transition);
        }
        .qtan-header.scrolled {
            box-shadow: var(--qtan-shadow-md);
        }
        .qtan-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: 68px;
        }
        .qtan-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--qtan-text);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .qtan-logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
            box-shadow: var(--qtan-shadow-glow);
        }
        .qtan-logo-text {
            white-space: nowrap;
            line-height: 1.2;
        }
        .qtan-logo-text small {
            display: block;
            font-size: 0.6rem;
            font-weight: 500;
            color: var(--qtan-text-muted);
            letter-spacing: 1px;
            text-transform: uppercase;
        }
        .qtan-nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: wrap;
        }
        .qtan-nav-links li a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 20px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--qtan-text-secondary);
            white-space: nowrap;
            transition: all var(--qtan-transition);
            position: relative;
        }
        .qtan-nav-links li a:hover {
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.08);
        }
        .qtan-nav-links li a.active {
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.12);
            font-weight: 700;
        }
        .qtan-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 3px;
            border-radius: 2px;
            background: var(--qtan-primary);
        }
        .qtan-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            color: #fff !important;
            font-weight: 700;
            font-size: 0.875rem;
            border-radius: 24px;
            border: none;
            white-space: nowrap;
            transition: all var(--qtan-transition);
            box-shadow: var(--qtan-shadow-glow);
            cursor: pointer;
            flex-shrink: 0;
        }
        .qtan-nav-cta:hover {
            background: linear-gradient(135deg, var(--qtan-primary-dark), #047857);
            box-shadow: 0 12px 32px rgba(16, 185, 129, 0.3);
            transform: translateY(-1px);
        }
        .qtan-nav-cta:active {
            transform: translateY(0);
            box-shadow: var(--qtan-shadow-sm);
        }
        .qtan-mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            background: var(--qtan-surface);
            border: 1px solid var(--qtan-border);
            border-radius: 10px;
            color: var(--qtan-text);
            font-size: 20px;
            cursor: pointer;
            transition: all var(--qtan-transition);
            flex-shrink: 0;
        }
        .qtan-mobile-toggle:hover {
            background: rgba(16, 185, 129, 0.08);
            border-color: var(--qtan-primary-light);
        }
        .qtan-mobile-menu {
            display: none;
            background: var(--qtan-surface);
            border-bottom: 1px solid var(--qtan-border-light);
            padding: 12px 20px 20px;
            flex-direction: column;
            gap: 4px;
        }
        .qtan-mobile-menu.open {
            display: flex;
        }
        .qtan-mobile-menu a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 12px 14px;
            border-radius: 10px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--qtan-text-secondary);
            transition: all var(--qtan-transition);
        }
        .qtan-mobile-menu a:hover {
            background: rgba(16, 185, 129, 0.08);
            color: var(--qtan-primary);
        }
        .qtan-mobile-menu a.active {
            background: rgba(16, 185, 129, 0.12);
            color: var(--qtan-primary);
            font-weight: 700;
        }
        .qtan-hero-section {
            position: relative;
            padding: 80px 0 70px;
            background: linear-gradient(180deg, #ecfdf5 0%, #f8fafc 100%);
            overflow: hidden;
        }
        .qtan-hero-section::before {
            content: '';
            position: absolute;
            top: -180px;
            right: -180px;
            width: 480px;
            height: 480px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.15), transparent 70%);
            pointer-events: none;
        }
        .qtan-hero-section::after {
            content: '';
            position: absolute;
            bottom: -120px;
            left: -100px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.12), transparent 70%);
            pointer-events: none;
        }
        .qtan-hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .qtan-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            background: rgba(16, 185, 129, 0.12);
            color: var(--qtan-primary-dark);
            font-size: 0.8rem;
            font-weight: 700;
            border-radius: 20px;
            letter-spacing: 0.3px;
            margin-bottom: 18px;
        }
        .qtan-hero-title {
            font-size: clamp(2rem, 4vw, 3.2rem);
            font-weight: 900;
            color: var(--qtan-text);
            line-height: 1.2;
            letter-spacing: -1px;
            margin-bottom: 18px;
        }
        .qtan-hero-title span {
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .qtan-hero-desc {
            font-size: 1.05rem;
            color: var(--qtan-text-secondary);
            line-height: 1.8;
            max-width: 560px;
            margin-bottom: 28px;
        }
        .qtan-hero-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }
        .qtan-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 24px;
            font-weight: 700;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: all var(--qtan-transition);
            white-space: nowrap;
        }
        .qtan-btn-primary {
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            color: #fff;
            box-shadow: var(--qtan-shadow-glow);
        }
        .qtan-btn-primary:hover {
            background: linear-gradient(135deg, var(--qtan-primary-dark), #047857);
            box-shadow: 0 12px 32px rgba(16, 185, 129, 0.3);
            transform: translateY(-1px);
        }
        .qtan-btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--qtan-shadow-sm);
        }
        .qtan-btn-outline {
            background: var(--qtan-surface);
            color: var(--qtan-text);
            border: 1px solid var(--qtan-border);
            box-shadow: var(--qtan-shadow-sm);
        }
        .qtan-btn-outline:hover {
            border-color: var(--qtan-primary-light);
            color: var(--qtan-primary);
            box-shadow: var(--qtan-shadow-md);
            transform: translateY(-1px);
        }
        .qtan-btn-outline:active {
            transform: translateY(0);
            box-shadow: var(--qtan-shadow-sm);
        }
        .qtan-hero-panel {
            background: var(--qtan-surface);
            border-radius: var(--qtan-radius-lg);
            box-shadow: var(--qtan-shadow-lg);
            padding: 28px;
            border: 1px solid var(--qtan-border-light);
            position: relative;
        }
        .qtan-hero-panel::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--qtan-primary), var(--qtan-primary-light), var(--qtan-accent));
            border-radius: var(--qtan-radius-lg) var(--qtan-radius-lg) 0 0;
        }
        .qtan-hero-panel-title {
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--qtan-text);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .qtan-time-slots {
            display: grid;
            gap: 10px;
        }
        .qtan-time-slot {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 16px;
            border-radius: 12px;
            background: var(--qtan-bg);
            border: 1px solid var(--qtan-border-light);
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--qtan-text-secondary);
            cursor: pointer;
            transition: all var(--qtan-transition);
        }
        .qtan-time-slot:hover {
            border-color: var(--qtan-primary-light);
            background: rgba(16, 185, 129, 0.06);
            color: var(--qtan-primary-dark);
        }
        .qtan-time-slot.selected {
            background: rgba(16, 185, 129, 0.1);
            border-color: var(--qtan-primary);
            color: var(--qtan-primary-dark);
            font-weight: 700;
        }
        .qtan-time-slot .slot-badge {
            font-size: 0.75rem;
            padding: 4px 10px;
            border-radius: 12px;
            background: var(--qtan-surface);
            color: var(--qtan-text-muted);
            font-weight: 500;
            border: 1px solid var(--qtan-border-light);
        }
        .qtan-section {
            padding: 70px 0;
        }
        .qtan-section-alt {
            background: var(--qtan-surface);
            border-top: 1px solid var(--qtan-border-light);
            border-bottom: 1px solid var(--qtan-border-light);
        }
        .qtan-section-dark {
            background: #0f172a;
            color: #fff;
        }
        .qtan-section-header {
            margin-bottom: 40px;
        }
        .qtan-section-title {
            font-size: clamp(1.5rem, 2.5vw, 2.2rem);
            font-weight: 900;
            color: inherit;
            letter-spacing: -0.5px;
            line-height: 1.3;
            margin-bottom: 12px;
        }
        .qtan-section-subtitle {
            font-size: 1rem;
            color: var(--qtan-text-secondary);
            line-height: 1.7;
            max-width: 680px;
        }
        .qtan-section-dark .qtan-section-subtitle {
            color: #94a3b8;
        }
        .qtan-text-primary {
            color: var(--qtan-primary);
        }
        .qtan-text-accent {
            color: var(--qtan-accent);
        }
        .qtan-stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .qtan-stat-card {
            background: var(--qtan-surface);
            border-radius: var(--qtan-radius-md);
            padding: 24px 20px;
            box-shadow: var(--qtan-shadow-md);
            border: 1px solid var(--qtan-border-light);
            transition: all var(--qtan-transition);
            text-align: center;
        }
        .qtan-stat-card:hover {
            box-shadow: var(--qtan-shadow-lg);
            transform: translateY(-2px);
            border-color: var(--qtan-primary-light);
        }
        .qtan-stat-number {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--qtan-primary-dark);
            letter-spacing: -1px;
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .qtan-stat-label {
            font-size: 0.9rem;
            color: var(--qtan-text-secondary);
            font-weight: 600;
        }
        .qtan-stat-change {
            display: inline-block;
            margin-top: 8px;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: 12px;
        }
        .qtan-stat-change.up {
            background: rgba(16, 185, 129, 0.1);
            color: var(--qtan-primary-dark);
        }
        .qtan-stat-change.down {
            background: rgba(239, 68, 68, 0.1);
            color: #ef4444;
        }
        .qtan-service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .qtan-service-card {
            background: var(--qtan-surface);
            border-radius: var(--qtan-radius-md);
            padding: 28px 24px;
            box-shadow: var(--qtan-shadow-md);
            border: 1px solid var(--qtan-border-light);
            transition: all var(--qtan-transition);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .qtan-service-card:hover {
            box-shadow: var(--qtan-shadow-lg);
            transform: translateY(-3px);
            border-color: var(--qtan-primary-light);
        }
        .qtan-service-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            flex-shrink: 0;
        }
        .qtan-service-icon.green {
            background: rgba(16, 185, 129, 0.12);
            color: var(--qtan-primary-dark);
        }
        .qtan-service-icon.orange {
            background: rgba(245, 158, 11, 0.12);
            color: var(--qtan-accent-dark);
        }
        .qtan-service-icon.blue {
            background: rgba(59, 130, 246, 0.12);
            color: #3b82f6;
        }
        .qtan-service-icon.purple {
            background: rgba(168, 85, 247, 0.12);
            color: #a855f7;
        }
        .qtan-service-icon.red {
            background: rgba(239, 68, 68, 0.12);
            color: #ef4444;
        }
        .qtan-service-icon.teal {
            background: rgba(20, 184, 166, 0.12);
            color: #14b8a6;
        }
        .qtan-service-title {
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--qtan-text);
            letter-spacing: -0.3px;
        }
        .qtan-service-desc {
            font-size: 0.9rem;
            color: var(--qtan-text-secondary);
            line-height: 1.7;
            flex-grow: 1;
        }
        .qtan-service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .qtan-tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 16px;
            background: var(--qtan-bg);
            color: var(--qtan-text-secondary);
            border: 1px solid var(--qtan-border-light);
            transition: all var(--qtan-transition);
        }
        .qtan-tag:hover {
            background: rgba(16, 185, 129, 0.08);
            color: var(--qtan-primary-dark);
            border-color: var(--qtan-primary-light);
        }
        .qtan-compare-item {
            display: grid;
            grid-template-columns: 1fr 1fr;
            border-radius: var(--qtan-radius-md);
            overflow: hidden;
            border: 1px solid var(--qtan-border-light);
            box-shadow: var(--qtan-shadow-sm);
            transition: all var(--qtan-transition);
            background: var(--qtan-surface);
        }
        .qtan-compare-item:hover {
            box-shadow: var(--qtan-shadow-md);
            transform: translateY(-2px);
        }
        .qtan-compare-col {
            padding: 24px 22px;
        }
        .qtan-compare-col.primary {
            background: rgba(16, 185, 129, 0.04);
            border-right: 1px solid var(--qtan-border-light);
        }
        .qtan-compare-col.secondary {
            background: rgba(245, 158, 11, 0.04);
        }
        .qtan-compare-label {
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: 8px;
            color: var(--qtan-text-muted);
        }
        .qtan-compare-col.primary .qtan-compare-label {
            color: var(--qtan-primary-dark);
        }
        .qtan-compare-col.secondary .qtan-compare-label {
            color: var(--qtan-accent-dark);
        }
        .qtan-compare-value {
            font-size: 1.6rem;
            font-weight: 900;
            color: var(--qtan-text);
            letter-spacing: -0.5px;
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .qtan-compare-desc {
            font-size: 0.85rem;
            color: var(--qtan-text-secondary);
            line-height: 1.6;
        }
        .qtan-faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .qtan-faq-item {
            background: var(--qtan-surface);
            border-radius: var(--qtan-radius-md);
            overflow: hidden;
            border: 1px solid var(--qtan-border-light);
            transition: all var(--qtan-transition);
        }
        .qtan-faq-item:hover {
            border-color: var(--qtan-primary-light);
            box-shadow: var(--qtan-shadow-sm);
        }
        .qtan-faq-question {
            padding: 18px 22px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--qtan-text);
            user-select: none;
            transition: all var(--qtan-transition);
        }
        .qtan-faq-question:hover {
            color: var(--qtan-primary-dark);
        }
        .qtan-faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(16, 185, 129, 0.1);
            color: var(--qtan-primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            transition: transform var(--qtan-transition);
        }
        .qtan-faq-item.active .qtan-faq-icon {
            transform: rotate(180deg);
            background: var(--qtan-primary);
            color: #fff;
        }
        .qtan-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--qtan-transition), padding var(--qtan-transition);
            padding: 0 22px;
            color: var(--qtan-text-secondary);
            font-size: 0.9rem;
            line-height: 1.8;
        }
        .qtan-faq-item.active .qtan-faq-answer {
            max-height: 500px;
            padding: 0 22px 18px;
        }
        .qtan-form-section {
            background: linear-gradient(135deg, #0f172a, #1e293b);
            border-radius: var(--qtan-radius-xl);
            padding: 50px 40px;
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 40px;
            align-items: center;
            box-shadow: var(--qtan-shadow-lg);
            position: relative;
            overflow: hidden;
        }
        .qtan-form-section::before {
            content: '';
            position: absolute;
            top: -200px;
            right: -200px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.2), transparent 70%);
            pointer-events: none;
        }
        .qtan-form-info {
            z-index: 1;
        }
        .qtan-form-title {
            font-size: 1.8rem;
            font-weight: 900;
            color: #fff;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .qtan-form-desc {
            color: #94a3b8;
            font-size: 1rem;
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .qtan-form-benefit-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .qtan-form-benefit-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #cbd5e1;
            font-size: 0.9rem;
            font-weight: 500;
        }
        .qtan-form-benefit-list li i {
            color: var(--qtan-primary-light);
            font-size: 14px;
        }
        .qtan-form-box {
            background: var(--qtan-surface);
            border-radius: var(--qtan-radius-lg);
            padding: 30px 28px;
            z-index: 1;
            box-shadow: var(--qtan-shadow-lg);
        }
        .qtan-form-field {
            margin-bottom: 14px;
        }
        .qtan-form-field label {
            display: block;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--qtan-text);
            margin-bottom: 6px;
        }
        .qtan-form-field input,
        .qtan-form-field select {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--qtan-border);
            border-radius: var(--qtan-radius-sm);
            font-size: 0.9rem;
            color: var(--qtan-text);
            background: var(--qtan-bg);
            transition: all var(--qtan-transition);
            appearance: none;
        }
        .qtan-form-field input:focus,
        .qtan-form-field select:focus {
            outline: none;
            border-color: var(--qtan-primary);
            background: var(--qtan-surface);
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
        }
        .qtan-form-submit {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            color: #fff;
            font-weight: 800;
            font-size: 1rem;
            border-radius: 24px;
            border: none;
            cursor: pointer;
            transition: all var(--qtan-transition);
            box-shadow: var(--qtan-shadow-glow);
            margin-top: 8px;
        }
        .qtan-form-submit:hover {
            background: linear-gradient(135deg, var(--qtan-primary-dark), #047857);
            box-shadow: 0 12px 32px rgba(16, 185, 129, 0.35);
            transform: translateY(-1px);
        }
        .qtan-form-submit:active {
            transform: translateY(0);
            box-shadow: var(--qtan-shadow-sm);
        }
        .qtan-form-note {
            text-align: center;
            font-size: 0.78rem;
            color: var(--qtan-text-muted);
            margin-top: 10px;
        }
        .qtan-footer {
            background: #0f172a;
            color: #e2e8f0;
            padding: 60px 0 30px;
        }
        .qtan-footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 30px;
            margin-bottom: 30px;
        }
        .qtan-footer-brand {
            font-size: 1.25rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
        }
        .qtan-footer-desc {
            font-size: 0.9rem;
            color: #94a3b8;
            line-height: 1.7;
            max-width: 320px;
        }
        .qtan-footer h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }
        .qtan-footer-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .qtan-footer-links li a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: #94a3b8;
            transition: all var(--qtan-transition);
        }
        .qtan-footer-links li a:hover {
            color: var(--qtan-primary-light);
            transform: translateX(2px);
        }
        .qtan-footer-bottom {
            border-top: 1px solid rgba(226, 232, 240, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .qtan-footer-bottom-links {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            font-size: 0.8rem;
            color: #64748b;
        }
        .qtan-footer-bottom-info {
            display: flex;
            gap: 16px;
            font-size: 0.8rem;
            color: #64748b;
        }
        .qtan-footer-bottom-info a {
            color: #94a3b8;
            transition: color var(--qtan-transition);
        }
        .qtan-footer-bottom-info a:hover {
            color: var(--qtan-primary-light);
        }

        @media(max-width:1024px) {
            .qtan-nav-links {
                display: none;
            }
            .qtan-nav-cta {
                display: none;
            }
            .qtan-mobile-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .qtan-hero-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .qtan-stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .qtan-service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .qtan-form-section {
                grid-template-columns: 1fr;
                gap: 24px;
                padding: 36px 24px;
            }
            .qtan-footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media(max-width:768px) {
            .qtan-hero-section {
                padding: 50px 0 40px;
            }
            .qtan-section {
                padding: 50px 0;
            }
            .qtan-section-title {
                font-size: 1.5rem;
            }
            .qtan-hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .qtan-btn {
                justify-content: center;
            }
            .qtan-stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .qtan-stat-card {
                padding: 18px 14px;
            }
            .qtan-stat-number {
                font-size: 1.6rem;
            }
            .qtan-service-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .qtan-compare-item {
                grid-template-columns: 1fr;
            }
            .qtan-compare-col.primary {
                border-right: none;
                border-bottom: 1px solid var(--qtan-border-light);
            }
            .qtan-form-section {
                border-radius: var(--qtan-radius-lg);
                padding: 28px 18px;
            }
            .qtan-footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .qtan-footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .qtan-footer-bottom-links {
                justify-content: center;
            }
        }
        @media(max-width:520px) {
            .qtan-container {
                padding: 0 14px;
            }
            .qtan-hero-title {
                font-size: 1.7rem;
            }
            .qtan-hero-desc {
                font-size: 0.95rem;
            }
            .qtan-stats-row {
                grid-template-columns: 1fr;
            }
            .qtan-form-box {
                padding: 22px 18px;
            }
            .qtan-nav {
                height: 58px;
            }
            .qtan-logo-text {
                font-size: 1rem;
            }
            .qtan-logo-icon {
                width: 32px;
                height: 32px;
                font-size: 14px;
                border-radius: 8px;
            }
            .qtan-footer-bottom {
                font-size: 0.75rem;
            }
        }

/* roulang page: category1 */
:root {
            --qtan-primary: #10b981;
            --qtan-primary-dark: #059669;
            --qtan-primary-light: #34d399;
            --qtan-accent: #f59e0b;
            --qtan-accent-dark: #d97706;
            --qtan-bg: #f8fafc;
            --qtan-surface: #ffffff;
            --qtan-text: #0f172a;
            --qtan-text-secondary: #475569;
            --qtan-text-muted: #94a3b8;
            --qtan-border: #e2e8f0;
            --qtan-border-light: #f1f5f9;
            --qtan-radius-sm: 8px;
            --qtan-radius-md: 14px;
            --qtan-radius-lg: 22px;
            --qtan-radius-xl: 30px;
            --qtan-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --qtan-shadow-md: 0 6px 18px rgba(0, 0, 0, 0.07);
            --qtan-shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.1);
            --qtan-shadow-glow: 0 8px 30px rgba(16, 185, 129, 0.18);
            --qtan-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Noto Sans SC', sans-serif;
            background-color: var(--qtan-bg);
            color: var(--qtan-text);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a:focus-visible {
            outline: 3px solid rgba(16, 185, 129, 0.5);
            outline-offset: 3px;
            border-radius: 6px;
        }

        img {
            max-width: 100%;
            display: block;
            border-radius: var(--qtan-radius-md);
        }

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

        .qtan-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .qtan-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--qtan-border-light);
            transition: box-shadow var(--qtan-transition);
        }

        .qtan-header.scrolled {
            box-shadow: var(--qtan-shadow-md);
        }

        .qtan-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: 68px;
        }

        .qtan-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--qtan-text);
            letter-spacing: -0.5px;
        }

        .qtan-logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
            box-shadow: var(--qtan-shadow-glow);
        }

        .qtan-logo-text {
            white-space: nowrap;
        }

        .qtan-logo-text small {
            display: block;
            font-size: 0.6rem;
            font-weight: 500;
            color: var(--qtan-text-muted);
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .qtan-nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: wrap;
        }

        .qtan-nav-links li a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 20px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--qtan-text-secondary);
            white-space: nowrap;
            transition: all var(--qtan-transition);
            position: relative;
        }

        .qtan-nav-links li a:hover {
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.08);
        }

        .qtan-nav-links li a.active {
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.12);
            font-weight: 700;
        }

        .qtan-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 3px;
            border-radius: 2px;
            background: var(--qtan-primary);
        }

        .qtan-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            color: #fff !important;
            font-weight: 700;
            font-size: 0.875rem;
            border-radius: 24px;
            border: none;
            white-space: nowrap;
            transition: all var(--qtan-transition);
            box-shadow: var(--qtan-shadow-glow);
            cursor: pointer;
        }

        .qtan-nav-cta:hover {
            background: linear-gradient(135deg, var(--qtan-primary-dark), #047857);
            box-shadow: 0 12px 32px rgba(16, 185, 129, 0.3);
            transform: translateY(-1px);
        }

        .qtan-nav-cta:active {
            transform: translateY(0);
            box-shadow: var(--qtan-shadow-sm);
        }

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

        .qtan-mobile-toggle:hover {
            background: rgba(16, 185, 129, 0.08);
            border-color: var(--qtan-primary);
            color: var(--qtan-primary);
        }

        .qtan-mobile-menu {
            display: none;
            background: var(--qtan-surface);
            border-top: 1px solid var(--qtan-border-light);
            padding: 12px 20px 20px;
        }

        .qtan-mobile-menu a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 14px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--qtan-text-secondary);
            transition: all var(--qtan-transition);
        }

        .qtan-mobile-menu a:hover,
        .qtan-mobile-menu a.active {
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.08);
        }

        .qtan-mobile-menu a .fa-solid {
            width: 20px;
            text-align: center;
        }

        /* Hero */
        .qtan-hero {
            background: linear-gradient(160deg, #0f172a 0%, #134e4a 45%, #065f46 100%);
            color: #fff;
            padding: 70px 0 90px;
            position: relative;
            overflow: hidden;
        }

        .qtan-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.35) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .qtan-hero::after {
            content: '';
            position: absolute;
            bottom: -160px;
            left: -100px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.2) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .qtan-hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 50px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .qtan-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: 20px;
            padding: 6px 16px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            color: #d1fae5;
            margin-bottom: 20px;
        }

        .qtan-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 18px;
            letter-spacing: -1px;
        }

        .qtan-hero p {
            font-size: 1.1rem;
            color: #cbd5e1;
            margin-bottom: 30px;
            max-width: 560px;
        }

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

        .qtan-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: 26px;
            font-weight: 700;
            font-size: 0.9rem;
            transition: all var(--qtan-transition);
            cursor: pointer;
            border: none;
        }

        .qtan-btn-primary {
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            color: #fff;
            box-shadow: var(--qtan-shadow-glow);
        }

        .qtan-btn-primary:hover {
            background: linear-gradient(135deg, var(--qtan-primary-dark), #047857);
            box-shadow: 0 12px 36px rgba(16, 185, 129, 0.35);
            transform: translateY(-2px);
        }

        .qtan-btn-outline {
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.4);
            color: #fff;
        }

        .qtan-btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.7);
            transform: translateY(-2px);
        }

        .qtan-hero-panel {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--qtan-radius-lg);
            padding: 28px;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 24px 60px rgba(0, 0, 0, 0.3);
        }

        .qtan-hero-panel h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .qtan-time-slots {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
            margin-bottom: 18px;
        }

        .qtan-time-slot {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--qtan-radius-sm);
            padding: 10px 14px;
            font-size: 0.82rem;
            color: #e2e8f0;
            cursor: pointer;
            transition: all var(--qtan-transition);
            text-align: center;
            font-weight: 600;
        }

        .qtan-time-slot:hover,
        .qtan-time-slot.active {
            background: rgba(16, 185, 129, 0.3);
            border-color: var(--qtan-primary);
            color: #fff;
        }

        .qtan-hero-panel .qtan-btn {
            width: 100%;
            justify-content: center;
        }

        /* Section common */
        .qtan-section {
            padding: 70px 0;
        }

        .qtan-section-header {
            margin-bottom: 40px;
        }

        .qtan-section-header .qtan-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--qtan-primary);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 12px;
        }

        .qtan-section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 14px;
            color: var(--qtan-text);
        }

        .qtan-section-header p {
            font-size: 1.05rem;
            color: var(--qtan-text-secondary);
            max-width: 680px;
        }

        /* Stats */
        .qtan-stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .qtan-stat-card {
            background: var(--qtan-surface);
            border: 1px solid var(--qtan-border-light);
            border-radius: var(--qtan-radius-md);
            padding: 28px 24px;
            text-align: center;
            box-shadow: var(--qtan-shadow-sm);
            transition: all var(--qtan-transition);
        }

        .qtan-stat-card:hover {
            box-shadow: var(--qtan-shadow-md);
            transform: translateY(-4px);
        }

        .qtan-stat-card .qtan-stat-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 20px;
            background: rgba(16, 185, 129, 0.1);
            color: var(--qtan-primary);
        }

        .qtan-stat-card .qtan-stat-number {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--qtan-text);
            line-height: 1.2;
        }

        .qtan-stat-card .qtan-stat-label {
            font-size: 0.85rem;
            color: var(--qtan-text-muted);
            font-weight: 500;
            margin-top: 6px;
        }

        /* Service matrix */
        .qtan-service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .qtan-service-card {
            background: var(--qtan-surface);
            border: 1px solid var(--qtan-border-light);
            border-radius: var(--qtan-radius-lg);
            padding: 30px;
            box-shadow: var(--qtan-shadow-sm);
            transition: all var(--qtan-transition);
            position: relative;
            overflow: hidden;
        }

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

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

        .qtan-service-card:hover::before {
            opacity: 1;
        }

        .qtan-service-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--qtan-text);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .qtan-service-card h3 .fa-solid {
            color: var(--qtan-primary);
        }

        .qtan-service-card p {
            font-size: 0.9rem;
            color: var(--qtan-text-secondary);
            line-height: 1.8;
        }

        .qtan-service-card .qtan-card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 16px;
        }

        .qtan-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 12px;
            border-radius: 14px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(16, 185, 129, 0.08);
            color: var(--qtan-primary);
            transition: all var(--qtan-transition);
        }

        .qtan-tag:hover {
            background: rgba(16, 185, 129, 0.15);
        }

        /* Comparison */
        .qtan-compare-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
            align-items: start;
        }

        .qtan-compare-card {
            background: var(--qtan-surface);
            border-radius: var(--qtan-radius-lg);
            padding: 30px;
            box-shadow: var(--qtan-shadow-sm);
            border: 1px solid var(--qtan-border-light);
        }

        .qtan-compare-card.highlight {
            border-color: var(--qtan-primary);
            box-shadow: var(--qtan-shadow-glow);
            background: linear-gradient(170deg, #ffffff 0%, #f0fdf4 100%);
        }

        .qtan-compare-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .qtan-compare-list {
            list-style: none;
        }

        .qtan-compare-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 10px 0;
            font-size: 0.9rem;
            color: var(--qtan-text-secondary);
            border-bottom: 1px solid var(--qtan-border-light);
        }

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

        .qtan-compare-list li .fa-check-circle {
            color: var(--qtan-primary);
            flex-shrink: 0;
            margin-top: 4px;
        }

        .qtan-compare-list li .fa-xmark-circle {
            color: #ef4444;
            flex-shrink: 0;
            margin-top: 4px;
        }

        /* Scenario */
        .qtan-scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .qtan-scenario-card {
            display: flex;
            gap: 20px;
            background: var(--qtan-surface);
            border: 1px solid var(--qtan-border-light);
            border-radius: var(--qtan-radius-md);
            padding: 24px;
            box-shadow: var(--qtan-shadow-sm);
            transition: all var(--qtan-transition);
        }

        .qtan-scenario-card:hover {
            box-shadow: var(--qtan-shadow-md);
            transform: translateY(-3px);
        }

        .qtan-scenario-card img {
            width: 120px;
            height: 100px;
            object-fit: cover;
            flex-shrink: 0;
            border-radius: var(--qtan-radius-sm);
        }

        .qtan-scenario-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .qtan-scenario-card p {
            font-size: 0.88rem;
            color: var(--qtan-text-secondary);
            line-height: 1.75;
        }

        /* FAQ */
        .qtan-faq {
            background: var(--qtan-surface);
            border: 1px solid var(--qtan-border-light);
            border-radius: var(--qtan-radius-lg);
            padding: 36px;
            box-shadow: var(--qtan-shadow-sm);
        }

        .qtan-faq-item {
            border-bottom: 1px solid var(--qtan-border-light);
            padding: 18px 0;
        }

        .qtan-faq-item:last-child {
            border-bottom: none;
        }

        .qtan-faq-question {
            font-weight: 700;
            font-size: 1rem;
            color: var(--qtan-text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 4px 0;
            transition: color var(--qtan-transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }

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

        .qtan-faq-question .fa-chevron-down {
            transition: transform var(--qtan-transition);
            color: var(--qtan-text-muted);
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .qtan-faq-question.open .fa-chevron-down {
            transform: rotate(180deg);
        }

        .qtan-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            font-size: 0.9rem;
            color: var(--qtan-text-secondary);
            line-height: 1.85;
        }

        .qtan-faq-answer.open {
            max-height: 300px;
            padding-top: 10px;
        }

        /* CTA form */
        .qtan-cta {
            background: linear-gradient(135deg, #0f172a 0%, #065f46 100%);
            color: #fff;
            border-radius: var(--qtan-radius-xl);
            padding: 50px 40px;
            position: relative;
            overflow: hidden;
        }

        .qtan-cta::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.3) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .qtan-cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .qtan-cta h2 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }

        .qtan-cta p {
            color: #cbd5e1;
            font-size: 0.95rem;
            line-height: 1.8;
        }

        .qtan-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }

        .qtan-form input,
        .qtan-form select {
            flex: 1;
            min-width: 140px;
            padding: 12px 18px;
            border-radius: 26px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 0.9rem;
            outline: none;
            transition: all var(--qtan-transition);
        }

        .qtan-form input::placeholder {
            color: #94a3b8;
        }

        .qtan-form input:focus,
        .qtan-form select:focus {
            border-color: var(--qtan-primary);
            background: rgba(255, 255, 255, 0.18);
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
        }

        .qtan-form select option {
            color: var(--qtan-text);
            background: #fff;
        }

        .qtan-form button {
            padding: 12px 28px;
            border-radius: 26px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
            border: none;
            cursor: pointer;
            transition: all var(--qtan-transition);
            white-space: nowrap;
        }

        .qtan-form button:hover {
            background: linear-gradient(135deg, var(--qtan-primary-dark), #047857);
            box-shadow: 0 8px 24px rgba(16, 185, 129, 0.3);
            transform: translateY(-2px);
        }

        /* Footer */
        .qtan-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 55px 0 25px;
        }

        .qtan-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 35px;
            margin-bottom: 40px;
        }

        .qtan-footer-brand {
            font-weight: 800;
            font-size: 1.3rem;
            color: #fff;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
        }

        .qtan-footer-desc {
            font-size: 0.88rem;
            color: #94a3b8;
            line-height: 1.8;
            max-width: 380px;
        }

        .qtan-footer-grid h5 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .qtan-footer-links {
            list-style: none;
        }

        .qtan-footer-links li {
            margin-bottom: 9px;
        }

        .qtan-footer-links a {
            font-size: 0.85rem;
            color: #94a3b8;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: color var(--qtan-transition);
        }

        .qtan-footer-links a:hover {
            color: var(--qtan-primary-light);
        }

        .qtan-footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: #64748b;
        }

        .qtan-footer-bottom-links {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        .qtan-footer-bottom-links a {
            color: #64748b;
            transition: color var(--qtan-transition);
        }

        .qtan-footer-bottom-links a:hover {
            color: var(--qtan-primary-light);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .qtan-nav-links {
                display: none;
            }
            .qtan-nav-cta {
                display: none;
            }
            .qtan-mobile-toggle {
                display: flex;
            }
            .qtan-mobile-menu.open {
                display: block;
            }
            .qtan-hero-grid {
                grid-template-columns: 1fr;
                gap: 35px;
            }
            .qtan-hero h1 {
                font-size: 2.2rem;
            }
            .qtan-stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .qtan-service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .qtan-section {
                padding: 50px 0;
            }
            .qtan-hero {
                padding: 50px 0 70px;
            }
            .qtan-hero h1 {
                font-size: 1.8rem;
            }
            .qtan-hero p {
                font-size: 0.95rem;
            }
            .qtan-stats-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .qtan-service-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .qtan-compare-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .qtan-scenario-grid {
                grid-template-columns: 1fr;
            }
            .qtan-cta-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .qtan-cta {
                padding: 35px 24px;
            }
            .qtan-footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .qtan-faq {
                padding: 24px 18px;
            }
            .qtan-form input,
            .qtan-form select,
            .qtan-form button {
                flex: 1 1 100%;
            }
        }

        @media (max-width: 520px) {
            .qtan-container {
                padding: 0 14px;
            }
            .qtan-hero h1 {
                font-size: 1.5rem;
            }
            .qtan-hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .qtan-hero-actions .qtan-btn {
                width: 100%;
                justify-content: center;
            }
            .qtan-time-slots {
                grid-template-columns: 1fr;
            }
            .qtan-section-header h2 {
                font-size: 1.5rem;
            }
            .qtan-scenario-card {
                flex-direction: column;
            }
            .qtan-scenario-card img {
                width: 100%;
                height: auto;
                max-height: 180px;
            }
        }

/* roulang page: category4 */
:root {
            --qtan-primary: #10b981;
            --qtan-primary-dark: #059669;
            --qtan-primary-light: #34d399;
            --qtan-accent: #f59e0b;
            --qtan-accent-dark: #d97706;
            --qtan-bg: #f8fafc;
            --qtan-surface: #ffffff;
            --qtan-text: #0f172a;
            --qtan-text-secondary: #475569;
            --qtan-text-muted: #94a3b8;
            --qtan-border: #e2e8f0;
            --qtan-border-light: #f1f5f9;
            --qtan-radius-sm: 8px;
            --qtan-radius-md: 14px;
            --qtan-radius-lg: 22px;
            --qtan-radius-xl: 30px;
            --qtan-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --qtan-shadow-md: 0 6px 18px rgba(0, 0, 0, 0.07);
            --qtan-shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.1);
            --qtan-shadow-glow: 0 8px 30px rgba(16, 185, 129, 0.18);
            --qtan-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Noto Sans SC', sans-serif;
            background-color: var(--qtan-bg);
            color: var(--qtan-text);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--qtan-transition);
        }
        a:focus-visible {
            outline: 3px solid rgba(16, 185, 129, 0.5);
            outline-offset: 3px;
            border-radius: 6px;
        }
        img {
            max-width: 100%;
            display: block;
            border-radius: var(--qtan-radius-md);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        .qtan-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .qtan-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--qtan-border-light);
            transition: box-shadow var(--qtan-transition);
        }
        .qtan-header.scrolled {
            box-shadow: var(--qtan-shadow-md);
        }
        .qtan-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: 68px;
        }
        .qtan-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--qtan-text);
            letter-spacing: -0.5px;
        }
        .qtan-logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
            box-shadow: var(--qtan-shadow-glow);
        }
        .qtan-logo-text {
            white-space: nowrap;
        }
        .qtan-logo-text small {
            display: block;
            font-size: 0.6rem;
            font-weight: 500;
            color: var(--qtan-text-muted);
            letter-spacing: 1px;
            text-transform: uppercase;
        }
        .qtan-nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: wrap;
        }
        .qtan-nav-links li a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 20px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--qtan-text-secondary);
            white-space: nowrap;
            transition: all var(--qtan-transition);
            position: relative;
        }
        .qtan-nav-links li a:hover {
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.08);
        }
        .qtan-nav-links li a.active {
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.12);
            font-weight: 700;
        }
        .qtan-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 3px;
            border-radius: 2px;
            background: var(--qtan-primary);
        }
        .qtan-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            color: #fff !important;
            font-weight: 700;
            font-size: 0.875rem;
            border-radius: 24px;
            border: none;
            white-space: nowrap;
            transition: all var(--qtan-transition);
            box-shadow: var(--qtan-shadow-glow);
            cursor: pointer;
        }
        .qtan-nav-cta:hover {
            background: linear-gradient(135deg, var(--qtan-primary-dark), #047857);
            box-shadow: 0 12px 32px rgba(16, 185, 129, 0.3);
            transform: translateY(-1px);
        }
        .qtan-nav-cta:active {
            transform: translateY(0);
            box-shadow: var(--qtan-shadow-sm);
        }
        .qtan-mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            background: var(--qtan-surface);
            border: 1px solid var(--qtan-border);
            border-radius: 10px;
            color: var(--qtan-text);
            font-size: 1.1rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all var(--qtan-transition);
        }
        .qtan-mobile-toggle:hover {
            background: rgba(16, 185, 129, 0.08);
            border-color: var(--qtan-primary);
            color: var(--qtan-primary);
        }
        .qtan-mobile-menu {
            display: none;
            padding: 12px 20px 20px;
            background: var(--qtan-surface);
            border-top: 1px solid var(--qtan-border-light);
            flex-direction: column;
            gap: 4px;
        }
        .qtan-mobile-menu a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 14px;
            border-radius: 10px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--qtan-text-secondary);
            transition: all var(--qtan-transition);
        }
        .qtan-mobile-menu a:hover {
            background: rgba(16, 185, 129, 0.08);
            color: var(--qtan-primary);
        }
        .qtan-mobile-menu a.active {
            background: rgba(16, 185, 129, 0.12);
            color: var(--qtan-primary);
            font-weight: 700;
        }
        .qtan-mobile-menu.open {
            display: flex;
        }
        @media (max-width: 1024px) {
            .qtan-nav-links li a {
                padding: 6px 10px;
                font-size: 0.8rem;
            }
            .qtan-nav-cta {
                padding: 8px 16px;
                font-size: 0.8rem;
            }
        }
        @media (max-width: 768px) {
            .qtan-nav-links {
                display: none;
            }
            .qtan-nav-cta {
                display: none;
            }
            .qtan-mobile-toggle {
                display: flex;
            }
            .qtan-nav {
                height: 60px;
            }
        }
        @media (max-width: 520px) {
            .qtan-logo-text {
                font-size: 1rem;
            }
            .qtan-logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
                border-radius: 8px;
            }
            .qtan-container {
                padding: 0 12px;
            }
        }

        /* Footer */
        .qtan-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 56px 20px 28px;
            margin-top: 64px;
        }
        .qtan-footer-grid {
            max-width: 1280px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .qtan-footer-brand {
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
        }
        .qtan-footer-desc {
            font-size: 0.85rem;
            color: #94a3b8;
            line-height: 1.8;
            max-width: 320px;
        }
        .qtan-footer h5 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .qtan-footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .qtan-footer-links li {
            margin-bottom: 8px;
        }
        .qtan-footer-links a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            color: #94a3b8;
            transition: color var(--qtan-transition);
        }
        .qtan-footer-links a:hover {
            color: var(--qtan-primary-light);
        }
        .qtan-footer-bottom {
            max-width: 1280px;
            margin: 40px auto 0;
            padding-top: 20px;
            border-top: 1px solid #1e293b;
            display: flex;
            flex-direction: column;
            gap: 8px;
            font-size: 0.75rem;
            color: #64748b;
        }
        .qtan-footer-bottom-links {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            align-items: center;
        }
        .qtan-footer-bottom a {
            color: #94a3b8;
            transition: color var(--qtan-transition);
        }
        .qtan-footer-bottom a:hover {
            color: var(--qtan-primary-light);
        }
        @media (max-width: 768px) {
            .qtan-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .qtan-footer-bottom-links {
                gap: 10px;
                font-size: 0.7rem;
            }
        }
        @media (max-width: 520px) {
            .qtan-footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .qtan-footer {
                padding: 36px 16px 20px;
                margin-top: 40px;
            }
        }

        /* Section base */
        .qtan-section {
            padding: 64px 0;
        }
        .qtan-section-sm {
            padding: 40px 0;
        }
        .qtan-section-title {
            font-size: 1.75rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--qtan-text);
            margin-bottom: 10px;
            line-height: 1.3;
        }
        .qtan-section-subtitle {
            font-size: 1rem;
            color: var(--qtan-text-secondary);
            margin-bottom: 32px;
            max-width: 640px;
            line-height: 1.7;
        }
        .qtan-section-head {
            margin-bottom: 36px;
        }
        .qtan-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            background: rgba(16, 185, 129, 0.1);
            color: var(--qtan-primary-dark);
            margin-bottom: 12px;
        }
        .qtan-badge-accent {
            background: rgba(245, 158, 11, 0.1);
            color: var(--qtan-accent-dark);
        }
        .qtan-card {
            background: var(--qtan-surface);
            border-radius: var(--qtan-radius-lg);
            padding: 28px;
            box-shadow: var(--qtan-shadow-sm);
            border: 1px solid var(--qtan-border-light);
            transition: all var(--qtan-transition);
        }
        .qtan-card:hover {
            box-shadow: var(--qtan-shadow-md);
            border-color: rgba(16, 185, 129, 0.2);
            transform: translateY(-2px);
        }
        .qtan-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 26px;
            font-weight: 700;
            font-size: 0.9rem;
            border: none;
            cursor: pointer;
            transition: all var(--qtan-transition);
            white-space: nowrap;
        }
        .qtan-btn-primary {
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            color: #fff;
            box-shadow: var(--qtan-shadow-glow);
        }
        .qtan-btn-primary:hover {
            background: linear-gradient(135deg, var(--qtan-primary-dark), #047857);
            box-shadow: 0 12px 32px rgba(16, 185, 129, 0.3);
            transform: translateY(-1px);
        }
        .qtan-btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--qtan-shadow-sm);
        }
        .qtan-btn-outline {
            background: transparent;
            color: var(--qtan-primary);
            border: 2px solid var(--qtan-primary);
        }
        .qtan-btn-outline:hover {
            background: rgba(16, 185, 129, 0.06);
            border-color: var(--qtan-primary-dark);
        }
        .qtan-btn-accent {
            background: linear-gradient(135deg, var(--qtan-accent), var(--qtan-accent-dark));
            color: #fff;
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.25);
        }
        .qtan-btn-accent:hover {
            box-shadow: 0 12px 32px rgba(245, 158, 11, 0.35);
            transform: translateY(-1px);
        }
        .qtan-stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--qtan-primary);
            letter-spacing: -1px;
            line-height: 1.1;
        }
        .qtan-stat-label {
            font-size: 0.85rem;
            color: var(--qtan-text-muted);
            font-weight: 500;
            margin-top: 4px;
        }
        .qtan-faq-item {
            border: 1px solid var(--qtan-border);
            border-radius: var(--qtan-radius-md);
            background: var(--qtan-surface);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--qtan-transition);
        }
        .qtan-faq-item:hover {
            border-color: rgba(16, 185, 129, 0.3);
        }
        .qtan-faq-question {
            padding: 18px 24px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--qtan-text);
            user-select: none;
            transition: all var(--qtan-transition);
        }
        .qtan-faq-question:hover {
            color: var(--qtan-primary);
        }
        .qtan-faq-question .fa-chevron-down {
            transition: transform var(--qtan-transition);
            font-size: 0.8rem;
            color: var(--qtan-text-muted);
        }
        .qtan-faq-item.open .fa-chevron-down {
            transform: rotate(180deg);
            color: var(--qtan-primary);
        }
        .qtan-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--qtan-text-secondary);
            font-size: 0.9rem;
            line-height: 1.8;
        }
        .qtan-faq-item.open .qtan-faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* Hero specific */
        .qtan-hero-schedule {
            background: linear-gradient(160deg, #0f172a 0%, #1e293b 55%, #0f172a 100%);
            padding: 72px 0 60px;
            position: relative;
            overflow: hidden;
            color: #e2e8f0;
        }
        .qtan-hero-schedule::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.25), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .qtan-hero-schedule::after {
            content: '';
            position: absolute;
            bottom: -160px;
            left: -60px;
            width: 380px;
            height: 380px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.18), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .qtan-hero-grid-schedule {
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .qtan-hero-schedule h1 {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -1px;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 16px;
        }
        .qtan-hero-schedule .qtan-hero-sub {
            font-size: 1.05rem;
            color: #94a3b8;
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 540px;
        }
        .qtan-hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .qtan-faux-board {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--qtan-radius-lg);
            padding: 24px;
            backdrop-filter: blur(10px);
        }
        .qtan-faux-board-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .qtan-faux-board-title {
            font-weight: 700;
            color: #fff;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .qtan-faux-board-tag {
            font-size: 0.7rem;
            padding: 3px 10px;
            border-radius: 12px;
            background: rgba(16, 185, 129, 0.2);
            color: var(--qtan-primary-light);
            font-weight: 600;
        }
        .qtan-faux-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.85rem;
        }
        .qtan-faux-row:last-child {
            border-bottom: none;
        }
        .qtan-faux-team {
            color: #e2e8f0;
            font-weight: 600;
        }
        .qtan-faux-score {
            font-weight: 800;
            color: #fff;
            background: rgba(16, 185, 129, 0.2);
            padding: 2px 10px;
            border-radius: 8px;
            font-size: 0.8rem;
        }
        .qtan-faux-time {
            color: #64748b;
            font-size: 0.75rem;
        }

        /* Metrics dashboard */
        .qtan-metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .qtan-metric-card {
            background: var(--qtan-surface);
            border-radius: var(--qtan-radius-lg);
            padding: 24px;
            border: 1px solid var(--qtan-border-light);
            box-shadow: var(--qtan-shadow-sm);
            text-align: center;
            transition: all var(--qtan-transition);
        }
        .qtan-metric-card:hover {
            box-shadow: var(--qtan-shadow-md);
            border-color: rgba(16, 185, 129, 0.2);
            transform: translateY(-2px);
        }
        .qtan-metric-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 12px;
            font-size: 1.2rem;
            background: rgba(16, 185, 129, 0.1);
            color: var(--qtan-primary);
        }
        .qtan-metric-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--qtan-text);
            letter-spacing: -0.5px;
        }
        .qtan-metric-label {
            font-size: 0.85rem;
            color: var(--qtan-text-muted);
            margin-top: 4px;
        }

        /* Service matrix */
        .qtan-service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .qtan-service-card {
            background: var(--qtan-surface);
            border-radius: var(--qtan-radius-lg);
            padding: 28px;
            border: 1px solid var(--qtan-border-light);
            box-shadow: var(--qtan-shadow-sm);
            transition: all var(--qtan-transition);
            position: relative;
            overflow: hidden;
        }
        .qtan-service-card:hover {
            box-shadow: var(--qtan-shadow-md);
            border-color: rgba(16, 185, 129, 0.25);
            transform: translateY(-3px);
        }
        .qtan-service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--qtan-primary), var(--qtan-primary-light));
            opacity: 0;
            transition: opacity var(--qtan-transition);
        }
        .qtan-service-card:hover::before {
            opacity: 1;
        }
        .qtan-service-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(16, 185, 129, 0.12), rgba(16, 185, 129, 0.05));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--qtan-primary);
            margin-bottom: 16px;
        }
        .qtan-service-card h3 {
            font-size: 1.1rem;
            font-weight: 800;
            margin-bottom: 8px;
            color: var(--qtan-text);
        }
        .qtan-service-card p {
            font-size: 0.9rem;
            color: var(--qtan-text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .qtan-service-link {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--qtan-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--qtan-transition);
        }
        .qtan-service-link:hover {
            gap: 10px;
            color: var(--qtan-primary-dark);
        }

        /* Comparison section */
        .qtan-compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }
        .qtan-compare-card {
            background: var(--qtan-surface);
            border-radius: var(--qtan-radius-lg);
            padding: 28px;
            border: 1px solid var(--qtan-border-light);
            box-shadow: var(--qtan-shadow-sm);
            transition: all var(--qtan-transition);
        }
        .qtan-compare-card:hover {
            box-shadow: var(--qtan-shadow-md);
            border-color: rgba(16, 185, 129, 0.2);
        }
        .qtan-compare-card-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--qtan-border-light);
        }
        .qtan-compare-card-header h3 {
            font-size: 1rem;
            font-weight: 800;
            color: var(--qtan-text);
        }
        .qtan-compare-logo {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(16, 185, 129, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--qtan-primary);
            font-size: 1rem;
            flex-shrink: 0;
        }
        .qtan-compare-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .qtan-compare-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 8px 0;
            font-size: 0.85rem;
            color: var(--qtan-text-secondary);
            line-height: 1.6;
        }
        .qtan-compare-list li i {
            color: var(--qtan-primary);
            font-size: 0.7rem;
            margin-top: 5px;
            flex-shrink: 0;
        }

        /* Timeline */
        .qtan-timeline {
            position: relative;
            padding-left: 28px;
        }
        .qtan-timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(180deg, var(--qtan-primary), rgba(16, 185, 129, 0.1));
        }
        .qtan-timeline-item {
            position: relative;
            margin-bottom: 28px;
            padding-left: 16px;
        }
        .qtan-timeline-item::before {
            content: '';
            position: absolute;
            left: -24px;
            top: 8px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--qtan-primary);
            border: 3px solid #fff;
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
        }
        .qtan-timeline-date {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--qtan-text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 4px;
        }
        .qtan-timeline-title {
            font-weight: 700;
            color: var(--qtan-text);
            font-size: 0.95rem;
            margin-bottom: 4px;
        }
        .qtan-timeline-desc {
            font-size: 0.85rem;
            color: var(--qtan-text-secondary);
            line-height: 1.6;
        }

        /* CTA form section */
        .qtan-cta-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            border-radius: var(--qtan-radius-xl);
            padding: 48px;
            color: #e2e8f0;
            position: relative;
            overflow: hidden;
        }
        .qtan-cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.3), transparent 70%);
            border-radius: 50%;
        }
        .qtan-cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .qtan-cta-section h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .qtan-cta-section p {
            color: #94a3b8;
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .qtan-form-group {
            margin-bottom: 16px;
        }
        .qtan-form-group label {
            display: block;
            font-size: 0.8rem;
            font-weight: 700;
            color: #e2e8f0;
            margin-bottom: 6px;
            letter-spacing: 0.3px;
        }
        .qtan-form-input {
            width: 100%;
            padding: 12px 18px;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            font-size: 0.9rem;
            transition: all var(--qtan-transition);
        }
        .qtan-form-input::placeholder {
            color: #64748b;
        }
        .qtan-form-input:focus {
            outline: none;
            border-color: var(--qtan-primary);
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
            background: rgba(255, 255, 255, 0.08);
        }
        .qtan-form-select {
            width: 100%;
            padding: 12px 18px;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            font-size: 0.9rem;
            appearance: none;
            cursor: pointer;
            transition: all var(--qtan-transition);
        }
        .qtan-form-select:focus {
            outline: none;
            border-color: var(--qtan-primary);
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
        }
        .qtan-form-select option {
            color: #0f172a;
            background: #fff;
        }

        @media (max-width: 900px) {
            .qtan-hero-grid-schedule {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .qtan-hero-schedule h1 {
                font-size: 2rem;
            }
            .qtan-metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .qtan-service-grid {
                grid-template-columns: 1fr 1fr;
            }
            .qtan-compare-grid {
                grid-template-columns: 1fr;
            }
            .qtan-cta-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .qtan-cta-section {
                padding: 32px 24px;
            }
        }
        @media (max-width: 520px) {
            .qtan-section {
                padding: 40px 0;
            }
            .qtan-section-title {
                font-size: 1.4rem;
            }
            .qtan-hero-schedule {
                padding: 48px 0 40px;
            }
            .qtan-hero-schedule h1 {
                font-size: 1.6rem;
            }
            .qtan-hero-schedule .qtan-hero-sub {
                font-size: 0.9rem;
            }
            .qtan-metrics-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .qtan-service-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .qtan-compare-card {
                padding: 20px;
            }
            .qtan-faux-board {
                padding: 16px;
            }
            .qtan-btn {
                padding: 10px 20px;
                font-size: 0.8rem;
            }
        }

/* roulang page: category5 */
:root {
            --qtan-primary: #10b981;
            --qtan-primary-dark: #059669;
            --qtan-primary-light: #34d399;
            --qtan-accent: #f59e0b;
            --qtan-accent-dark: #d97706;
            --qtan-bg: #f8fafc;
            --qtan-surface: #ffffff;
            --qtan-text: #0f172a;
            --qtan-text-secondary: #475569;
            --qtan-text-muted: #94a3b8;
            --qtan-border: #e2e8f0;
            --qtan-border-light: #f1f5f9;
            --qtan-radius-sm: 8px;
            --qtan-radius-md: 14px;
            --qtan-radius-lg: 22px;
            --qtan-radius-xl: 30px;
            --qtan-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --qtan-shadow-md: 0 6px 18px rgba(0, 0, 0, 0.07);
            --qtan-shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.1);
            --qtan-shadow-glow: 0 8px 30px rgba(16, 185, 129, 0.18);
            --qtan-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Noto Sans SC', sans-serif;
            background-color: var(--qtan-bg);
            color: var(--qtan-text);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a:focus-visible {
            outline: 3px solid rgba(16, 185, 129, 0.5);
            outline-offset: 3px;
            border-radius: 6px;
        }

        img {
            max-width: 100%;
            display: block;
            border-radius: var(--qtan-radius-md);
        }

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

        .qtan-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .qtan-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--qtan-border-light);
            transition: box-shadow var(--qtan-transition);
        }

        .qtan-header.scrolled {
            box-shadow: var(--qtan-shadow-md);
        }

        .qtan-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: 68px;
        }

        .qtan-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--qtan-text);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }

        .qtan-logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
            box-shadow: var(--qtan-shadow-glow);
        }

        .qtan-logo-text {
            white-space: nowrap;
        }

        .qtan-logo-text small {
            display: block;
            font-size: 0.6rem;
            font-weight: 500;
            color: var(--qtan-text-muted);
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .qtan-nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: wrap;
            margin: 0;
            padding: 0;
        }

        .qtan-nav-links li a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 20px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--qtan-text-secondary);
            white-space: nowrap;
            transition: all var(--qtan-transition);
            position: relative;
        }

        .qtan-nav-links li a:hover {
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.08);
        }

        .qtan-nav-links li a.active {
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.12);
            font-weight: 700;
        }

        .qtan-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 3px;
            border-radius: 2px;
            background: var(--qtan-primary);
        }

        .qtan-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            color: #fff !important;
            font-weight: 700;
            font-size: 0.875rem;
            border-radius: 24px;
            border: none;
            white-space: nowrap;
            transition: all var(--qtan-transition);
            box-shadow: var(--qtan-shadow-glow);
            cursor: pointer;
            flex-shrink: 0;
        }

        .qtan-nav-cta:hover {
            background: linear-gradient(135deg, var(--qtan-primary-dark), #047857);
            box-shadow: 0 12px 32px rgba(16, 185, 129, 0.3);
            transform: translateY(-1px);
        }

        .qtan-nav-cta:active {
            transform: translateY(0);
            box-shadow: var(--qtan-shadow-sm);
        }

        .qtan-mobile-toggle {
            display: none;
            width: 42px;
            height: 42px;
            background: var(--qtan-surface);
            border: 1px solid var(--qtan-border);
            border-radius: 10px;
            color: var(--qtan-text);
            font-size: 18px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: all var(--qtan-transition);
            flex-shrink: 0;
        }

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

        .qtan-mobile-menu {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 12px 20px 16px;
            background: rgba(255, 255, 255, 0.98);
            border-top: 1px solid var(--qtan-border-light);
            backdrop-filter: blur(16px);
        }

        .qtan-mobile-menu a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 16px;
            border-radius: 10px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--qtan-text-secondary);
            transition: all var(--qtan-transition);
        }

        .qtan-mobile-menu a:hover {
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.08);
        }

        .qtan-mobile-menu a.active {
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.12);
            font-weight: 700;
        }

        .qtan-mobile-menu a.qtan-nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 20px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            color: #fff !important;
            font-weight: 700;
            font-size: 0.875rem;
            border-radius: 24px;
            margin-top: 8px;
            text-align: center;
        }

        @media (max-width: 1024px) {
            .qtan-nav-links {
                display: none;
            }
            .qtan-nav-cta {
                display: none;
            }
            .qtan-mobile-toggle {
                display: inline-flex;
            }
            .qtan-mobile-menu.open {
                display: flex;
            }
        }

        /* Hero Section */
        .qtan-hero {
            background: linear-gradient(180deg, #ecfdf5 0%, var(--qtan-bg) 100%);
            position: relative;
            overflow: hidden;
            padding: 60px 0;
        }

        .qtan-hero::before {
            content: '';
            position: absolute;
            top: -200px;
            right: -200px;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }

        .qtan-hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .qtan-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            background: rgba(16, 185, 129, 0.1);
            color: var(--qtan-primary-dark);
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .qtan-hero-title {
            font-size: 2.5rem;
            font-weight: 900;
            line-height: 1.25;
            letter-spacing: -0.5px;
            color: var(--qtan-text);
            margin-bottom: 16px;
        }

        .qtan-hero-title span {
            color: var(--qtan-primary);
            position: relative;
        }

        .qtan-hero-desc {
            font-size: 1.05rem;
            color: var(--qtan-text-secondary);
            margin-bottom: 24px;
            max-width: 520px;
        }

        .qtan-invite-panel {
            background: var(--qtan-surface);
            border: 1px solid var(--qtan-border);
            border-radius: var(--qtan-radius-lg);
            padding: 24px;
            box-shadow: var(--qtan-shadow-md);
            margin-top: 12px;
        }

        .qtan-invite-panel h4 {
            font-size: 1rem;
            font-weight: 800;
            color: var(--qtan-text);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .qtan-invite-rewards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
            margin: 14px 0 18px;
        }

        .qtan-reward-item {
            background: var(--qtan-bg);
            border: 1px solid var(--qtan-border-light);
            border-radius: var(--qtan-radius-sm);
            padding: 12px 14px;
            text-align: center;
            transition: all var(--qtan-transition);
        }

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

        .qtan-reward-item strong {
            display: block;
            font-size: 1.1rem;
            color: var(--qtan-primary-dark);
            font-weight: 800;
            margin-bottom: 4px;
        }

        .qtan-reward-item span {
            font-size: 0.75rem;
            color: var(--qtan-text-secondary);
            line-height: 1.5;
            display: block;
        }

        .qtan-progress-wrap {
            margin: 16px 0 20px;
        }

        .qtan-progress-label {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--qtan-text-secondary);
            margin-bottom: 8px;
        }

        .qtan-progress-label strong {
            color: var(--qtan-primary-dark);
            font-weight: 800;
        }

        .qtan-progress-bar {
            width: 100%;
            height: 10px;
            background: var(--qtan-border-light);
            border-radius: 20px;
            overflow: hidden;
            position: relative;
        }

        .qtan-progress-bar-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--qtan-primary), var(--qtan-accent));
            border-radius: 20px;
            transition: width 0.5s ease;
            position: relative;
        }

        .qtan-progress-bar-fill::after {
            content: '';
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 18px;
            height: 18px;
            background: var(--qtan-surface);
            border: 3px solid var(--qtan-primary);
            border-radius: 50%;
            box-shadow: var(--qtan-shadow-sm);
        }

        .qtan-invite-actions {
            display: flex;
            gap: 12px;
            align-items: center;
            flex-wrap: wrap;
        }

        .qtan-btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
            border-radius: 24px;
            border: none;
            transition: all var(--qtan-transition);
            box-shadow: var(--qtan-shadow-glow);
            cursor: pointer;
        }

        .qtan-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 36px rgba(16, 185, 129, 0.35);
        }

        .qtan-btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            background: var(--qtan-surface);
            color: var(--qtan-text-secondary);
            font-weight: 700;
            font-size: 0.9rem;
            border-radius: 24px;
            border: 1px solid var(--qtan-border);
            transition: all var(--qtan-transition);
            cursor: pointer;
        }

        .qtan-btn-secondary:hover {
            border-color: var(--qtan-primary);
            color: var(--qtan-primary);
            box-shadow: var(--qtan-shadow-sm);
        }

        .qtan-hero-visual {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .qtan-hero-visual img {
            width: 100%;
            max-width: 520px;
            border-radius: var(--qtan-radius-lg);
            box-shadow: var(--qtan-shadow-lg);
            object-fit: cover;
        }

        .qtan-hero-float-card {
            position: absolute;
            bottom: 20px;
            left: -20px;
            background: var(--qtan-surface);
            border-radius: var(--qtan-radius-md);
            padding: 16px 20px;
            box-shadow: var(--qtan-shadow-lg);
            display: flex;
            align-items: center;
            gap: 12px;
            border: 1px solid var(--qtan-border-light);
        }

        .qtan-hero-float-card .fa-solid {
            width: 42px;
            height: 42px;
            background: rgba(16, 185, 129, 0.12);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--qtan-primary);
            font-size: 18px;
        }

        .qtan-hero-float-card strong {
            font-size: 1.3rem;
            font-weight: 800;
            display: block;
            line-height: 1.2;
            color: var(--qtan-text);
        }

        .qtan-hero-float-card span {
            font-size: 0.75rem;
            color: var(--qtan-text-muted);
            display: block;
        }

        @media (max-width: 900px) {
            .qtan-hero-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .qtan-hero-title {
                font-size: 1.8rem;
            }
            .qtan-hero-visual {
                order: 2;
            }
            .qtan-hero-float-card {
                left: 10px;
                bottom: -10px;
            }
            .qtan-invite-rewards {
                grid-template-columns: 1fr;
            }
        }

        /* Section Common */
        .qtan-section {
            padding: 56px 0;
        }
        .qtan-section-alt {
            background: var(--qtan-surface);
            border-top: 1px solid var(--qtan-border-light);
            border-bottom: 1px solid var(--qtan-border-light);
        }
        .qtan-section-dark {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            color: #e2e8f0;
        }
        .qtan-section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.75rem;
            font-weight: 800;
            color: var(--qtan-primary-dark);
            background: rgba(16, 185, 129, 0.1);
            padding: 4px 14px;
            border-radius: 20px;
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .qtan-section-title {
            font-size: 1.8rem;
            font-weight: 900;
            letter-spacing: -0.5px;
            color: var(--qtan-text);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .qtan-section-desc {
            font-size: 0.95rem;
            color: var(--qtan-text-secondary);
            max-width: 680px;
            line-height: 1.8;
        }
        .qtan-section-dark .qtan-section-title {
            color: #fff;
        }
        .qtan-section-dark .qtan-section-desc {
            color: #cbd5e1;
        }

        /* Stats Dashboard */
        .qtan-stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .qtan-stat-card {
            background: var(--qtan-surface);
            border: 1px solid var(--qtan-border-light);
            border-radius: var(--qtan-radius-md);
            padding: 22px 20px;
            text-align: center;
            transition: all var(--qtan-transition);
            box-shadow: var(--qtan-shadow-sm);
        }
        .qtan-stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--qtan-shadow-md);
            border-color: rgba(16, 185, 129, 0.3);
        }
        .qtan-stat-card .qtan-stat-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 12px;
        }
        .qtan-stat-card strong {
            font-size: 2rem;
            font-weight: 900;
            display: block;
            color: var(--qtan-text);
            letter-spacing: -1px;
            line-height: 1.2;
        }
        .qtan-stat-card span {
            font-size: 0.8rem;
            color: var(--qtan-text-muted);
            font-weight: 600;
        }
        .qtan-stat-card .qtan-stat-trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.7rem;
            color: var(--qtan-primary);
            font-weight: 700;
            margin-top: 6px;
        }
        @media (max-width: 900px) {
            .qtan-stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .qtan-stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .qtan-stat-card strong {
                font-size: 1.5rem;
            }
        }

        /* Service Matrix */
        .qtan-service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .qtan-service-card {
            background: var(--qtan-surface);
            border: 1px solid var(--qtan-border-light);
            border-radius: var(--qtan-radius-lg);
            padding: 26px 24px;
            transition: all var(--qtan-transition);
            box-shadow: var(--qtan-shadow-sm);
            position: relative;
            overflow: hidden;
        }
        .qtan-service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--qtan-primary), var(--qtan-accent));
            opacity: 0;
            transition: opacity var(--qtan-transition);
        }
        .qtan-service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--qtan-shadow-lg);
            border-color: rgba(16, 185, 129, 0.25);
        }
        .qtan-service-card:hover::before {
            opacity: 1;
        }
        .qtan-service-card .qtan-service-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
        }
        .qtan-service-card h3 {
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--qtan-text);
            margin-bottom: 8px;
        }
        .qtan-service-card p {
            font-size: 0.85rem;
            color: var(--qtan-text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .qtan-service-card .qtan-service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .qtan-service-card .qtan-service-tags span {
            font-size: 0.7rem;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: 12px;
            background: var(--qtan-bg);
            color: var(--qtan-text-secondary);
            border: 1px solid var(--qtan-border-light);
        }
        @media (max-width: 900px) {
            .qtan-service-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Deep Content */
        .qtan-deep-content {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: start;
        }
        .qtan-deep-content .qtan-deep-text h3 {
            font-size: 1.4rem;
            font-weight: 900;
            color: var(--qtan-text);
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .qtan-deep-content .qtan-deep-text p {
            font-size: 0.95rem;
            color: var(--qtan-text-secondary);
            line-height: 1.9;
            margin-bottom: 16px;
        }
        .qtan-deep-content .qtan-deep-text ul {
            list-style: none;
            padding: 0;
            margin: 16px 0;
        }
        .qtan-deep-content .qtan-deep-text ul li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 10px 0;
            font-size: 0.9rem;
            color: var(--qtan-text-secondary);
            border-bottom: 1px solid var(--qtan-border-light);
        }
        .qtan-deep-content .qtan-deep-text ul li .fa-solid {
            color: var(--qtan-primary);
            margin-top: 4px;
            flex-shrink: 0;
        }
        .qtan-deep-image img {
            width: 100%;
            border-radius: var(--qtan-radius-lg);
            box-shadow: var(--qtan-shadow-lg);
            object-fit: cover;
        }
        .qtan-deep-image .qtan-image-caption {
            font-size: 0.75rem;
            color: var(--qtan-text-muted);
            text-align: center;
            margin-top: 10px;
        }
        @media (max-width: 900px) {
            .qtan-deep-content {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .qtan-deep-image {
                order: -1;
            }
        }

        /* Comparison */
        .qtan-comparison-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .qtan-compare-card {
            border-radius: var(--qtan-radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--qtan-border-light);
            transition: all var(--qtan-transition);
        }
        .qtan-compare-card.plain {
            background: var(--qtan-surface);
        }
        .qtan-compare-card.highlight {
            background: linear-gradient(135deg, #ecfdf5, #d1fae5);
            border-color: rgba(16, 185, 129, 0.3);
            box-shadow: var(--qtan-shadow-md);
        }
        .qtan-compare-card h3 {
            font-size: 1.15rem;
            font-weight: 800;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .qtan-compare-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .qtan-compare-card ul li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 10px 0;
            font-size: 0.88rem;
            color: var(--qtan-text-secondary);
            border-bottom: 1px solid var(--qtan-border-light);
        }
        .qtan-compare-card ul li:last-child {
            border-bottom: none;
        }
        .qtan-compare-card ul li .fa-solid {
            margin-top: 4px;
            flex-shrink: 0;
        }
        .qtan-compare-card.plain ul li .fa-xmark {
            color: #ef4444;
        }
        .qtan-compare-card.highlight ul li .fa-check {
            color: var(--qtan-primary-dark);
        }
        @media (max-width: 767px) {
            .qtan-comparison-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Testimonials */
        .qtan-testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }
        .qtan-testimonial-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--qtan-radius-md);
            padding: 22px 20px;
            transition: all var(--qtan-transition);
        }
        .qtan-testimonial-card:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(16, 185, 129, 0.4);
        }
        .qtan-testimonial-card .qtan-quote-icon {
            color: var(--qtan-primary);
            font-size: 1.5rem;
            margin-bottom: 10px;
            display: block;
        }
        .qtan-testimonial-card p {
            font-size: 0.9rem;
            color: #e2e8f0;
            line-height: 1.8;
            margin-bottom: 14px;
        }
        .qtan-testimonial-card .qtan-user {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .qtan-testimonial-card .qtan-avatar {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-accent));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 0.8rem;
            flex-shrink: 0;
        }
        .qtan-testimonial-card .qtan-user strong {
            display: block;
            color: #fff;
            font-size: 0.85rem;
            font-weight: 700;
        }
        .qtan-testimonial-card .qtan-user span {
            font-size: 0.7rem;
            color: #94a3b8;
        }
        @media (max-width: 900px) {
            .qtan-testimonial-grid {
                grid-template-columns: 1fr;
            }
        }

        /* FAQ */
        .qtan-faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .qtan-faq-item {
            background: var(--qtan-surface);
            border: 1px solid var(--qtan-border-light);
            border-radius: var(--qtan-radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--qtan-transition);
        }
        .qtan-faq-item:hover {
            border-color: rgba(16, 185, 129, 0.3);
            box-shadow: var(--qtan-shadow-sm);
        }
        .qtan-faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            cursor: pointer;
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--qtan-text);
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: all var(--qtan-transition);
        }
        .qtan-faq-question .fa-chevron-down {
            color: var(--qtan-text-muted);
            transition: transform var(--qtan-transition);
            flex-shrink: 0;
        }
        .qtan-faq-item.open .qtan-faq-question .fa-chevron-down {
            transform: rotate(180deg);
            color: var(--qtan-primary);
        }
        .qtan-faq-answer {
            padding: 0 20px 18px;
            font-size: 0.88rem;
            color: var(--qtan-text-secondary);
            line-height: 1.8;
            display: none;
        }
        .qtan-faq-item.open .qtan-faq-answer {
            display: block;
        }

        /* CTA Form */
        .qtan-cta-form-wrap {
            background: var(--qtan-surface);
            border-radius: var(--qtan-radius-xl);
            padding: 40px 36px;
            box-shadow: var(--qtan-shadow-lg);
            border: 1px solid var(--qtan-border-light);
            max-width: 720px;
            margin: 0 auto;
        }
        .qtan-cta-form-wrap h3 {
            font-size: 1.5rem;
            font-weight: 900;
            color: var(--qtan-text);
            margin-bottom: 8px;
            letter-spacing: -0.3px;
        }
        .qtan-cta-form-wrap p {
            font-size: 0.9rem;
            color: var(--qtan-text-secondary);
            margin-bottom: 24px;
        }
        .qtan-form-group {
            margin-bottom: 16px;
        }
        .qtan-form-group label {
            display: block;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--qtan-text);
            margin-bottom: 6px;
        }
        .qtan-form-group input,
        .qtan-form-group select,
        .qtan-form-group textarea {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--qtan-border);
            border-radius: var(--qtan-radius-sm);
            font-size: 0.9rem;
            color: var(--qtan-text);
            background: var(--qtan-bg);
            transition: all var(--qtan-transition);
            outline: none;
        }
        .qtan-form-group input:focus,
        .qtan-form-group select:focus,
        .qtan-form-group textarea:focus {
            border-color: var(--qtan-primary);
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
            background: var(--qtan-surface);
        }
        .qtan-form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .qtan-form-submit {
            width: 100%;
            padding: 14px 24px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            color: #fff;
            font-weight: 700;
            font-size: 0.95rem;
            border-radius: 24px;
            border: none;
            cursor: pointer;
            transition: all var(--qtan-transition);
            box-shadow: var(--qtan-shadow-glow);
        }
        .qtan-form-submit:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 36px rgba(16, 185, 129, 0.35);
        }

        /* Footer */
        .qtan-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 48px 0 24px;
        }
        .qtan-footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .qtan-footer-brand {
            font-size: 1.1rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
        }
        .qtan-footer-desc {
            font-size: 0.85rem;
            color: #94a3b8;
            line-height: 1.8;
            max-width: 320px;
        }
        .qtan-footer h5 {
            font-size: 0.8rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 1px;
            text-transform: uppercase;
        }
        .qtan-footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .qtan-footer-links li {
            margin-bottom: 8px;
        }
        .qtan-footer-links li a {
            font-size: 0.85rem;
            color: #94a3b8;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color var(--qtan-transition);
        }
        .qtan-footer-links li a:hover {
            color: var(--qtan-primary-light);
        }
        .qtan-footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        .qtan-footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 18px;
            flex-wrap: wrap;
            font-size: 0.75rem;
            color: #64748b;
        }
        .qtan-footer-bottom-links a {
            color: #94a3b8;
            font-size: 0.75rem;
            transition: color var(--qtan-transition);
        }
        .qtan-footer-bottom-links a:hover {
            color: var(--qtan-primary-light);
        }
        @media (max-width: 900px) {
            .qtan-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 520px) {
            .qtan-footer-grid {
                grid-template-columns: 1fr;
            }
            .qtan-footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* Additional responsive */
        @media (max-width: 767px) {
            .qtan-section {
                padding: 40px 0;
            }
            .qtan-section-title {
                font-size: 1.5rem;
            }
            .qtan-cta-form-wrap {
                padding: 24px 18px;
            }
            .qtan-hero {
                padding: 36px 0;
            }
        }

/* roulang page: category6 */
:root {
            --qtan-primary: #10b981;
            --qtan-primary-dark: #059669;
            --qtan-primary-light: #34d399;
            --qtan-accent: #f59e0b;
            --qtan-accent-dark: #d97706;
            --qtan-bg: #f8fafc;
            --qtan-surface: #ffffff;
            --qtan-text: #0f172a;
            --qtan-text-secondary: #475569;
            --qtan-text-muted: #94a3b8;
            --qtan-border: #e2e8f0;
            --qtan-border-light: #f1f5f9;
            --qtan-radius-sm: 8px;
            --qtan-radius-md: 14px;
            --qtan-radius-lg: 22px;
            --qtan-radius-xl: 30px;
            --qtan-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --qtan-shadow-md: 0 6px 18px rgba(0, 0, 0, 0.07);
            --qtan-shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.1);
            --qtan-shadow-glow: 0 8px 30px rgba(16, 185, 129, 0.18);
            --qtan-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', 'Noto Sans SC', sans-serif;
            background-color: var(--qtan-bg);
            color: var(--qtan-text);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a:focus-visible {
            outline: 3px solid rgba(16, 185, 129, 0.5);
            outline-offset: 3px;
            border-radius: 6px;
        }

        img {
            max-width: 100%;
            display: block;
            border-radius: var(--qtan-radius-md);
        }

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

        .qtan-container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .qtan-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--qtan-border-light);
            transition: box-shadow var(--qtan-transition);
        }

        .qtan-header.scrolled {
            box-shadow: var(--qtan-shadow-md);
        }

        .qtan-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            height: 68px;
        }

        .qtan-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--qtan-text);
            letter-spacing: -0.5px;
        }

        .qtan-logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            flex-shrink: 0;
            box-shadow: var(--qtan-shadow-glow);
        }

        .qtan-logo-text {
            white-space: nowrap;
        }

        .qtan-logo-text small {
            display: block;
            font-size: 0.6rem;
            font-weight: 500;
            color: var(--qtan-text-muted);
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .qtan-nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: wrap;
        }

        .qtan-nav-links li a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 14px;
            border-radius: 20px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--qtan-text-secondary);
            white-space: nowrap;
            transition: all var(--qtan-transition);
            position: relative;
        }

        .qtan-nav-links li a:hover {
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.08);
        }

        .qtan-nav-links li a.active {
            color: var(--qtan-primary);
            background: rgba(16, 185, 129, 0.12);
            font-weight: 700;
        }

        .qtan-nav-links li a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 3px;
            border-radius: 2px;
            background: var(--qtan-primary);
        }

        .qtan-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            color: #fff !important;
            font-weight: 700;
            font-size: 0.875rem;
            border-radius: 24px;
            border: none;
            white-space: nowrap;
            transition: all var(--qtan-transition);
            box-shadow: var(--qtan-shadow-glow);
            cursor: pointer;
        }

        .qtan-nav-cta:hover {
            background: linear-gradient(135deg, var(--qtan-primary-dark), #047857);
            box-shadow: 0 12px 32px rgba(16, 185, 129, 0.3);
            transform: translateY(-1px);
        }

        .qtan-nav-cta:active {
            transform: translateY(0);
            box-shadow: var(--qtan-shadow-sm);
        }

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

        .qtan-mobile-toggle:hover {
            background: rgba(16, 185, 129, 0.08);
            border-color: var(--qtan-primary);
        }

        .qtan-mobile-menu {
            display: none;
            flex-direction: column;
            padding: 10px 20px 20px;
            gap: 4px;
            background: rgba(255, 255, 255, 0.98);
            border-bottom: 1px solid var(--qtan-border-light);
            box-shadow: var(--qtan-shadow-md);
        }

        .qtan-mobile-menu.open {
            display: flex;
        }

        .qtan-mobile-menu a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 14px;
            border-radius: var(--qtan-radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--qtan-text-secondary);
            transition: all var(--qtan-transition);
        }

        .qtan-mobile-menu a:hover,
        .qtan-mobile-menu a.active {
            background: rgba(16, 185, 129, 0.1);
            color: var(--qtan-primary);
        }

        .qtan-btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: linear-gradient(135deg, var(--qtan-primary), var(--qtan-primary-dark));
            color: #fff !important;
            font-weight: 700;
            font-size: 0.95rem;
            border-radius: 26px;
            border: none;
            transition: all var(--qtan-transition);
            box-shadow: var(--qtan-shadow-glow);
            cursor: pointer;
        }

        .qtan-btn-primary:hover {
            background: linear-gradient(135deg, var(--qtan-primary-dark), #047857);
            box-shadow: 0 12px 32px rgba(16, 185, 129, 0.3);
            transform: translateY(-2px);
        }

        .qtan-btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--qtan-shadow-sm);
        }

        .qtan-btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: transparent;
            color: var(--qtan-primary);
            font-weight: 700;
            font-size: 0.95rem;
            border-radius: 26px;
            border: 2px solid var(--qtan-primary);
            transition: all var(--qtan-transition);
            cursor: pointer;
        }

        .qtan-btn-outline:hover {
            background: rgba(16, 185, 129, 0.08);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(16, 185, 129, 0.15);
        }

        .qtan-btn-outline:active {
            transform: translateY(0);
        }

        .qtan-section {
            padding: 70px 0;
        }

        .qtan-section-title {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--qtan-text);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .qtan-section-subtitle {
            font-size: 1.05rem;
            color: var(--qtan-text-secondary);
            max-width: 680px;
            line-height: 1.8;
        }

        .qtan-card {
            background: var(--qtan-surface);
            border: 1px solid var(--qtan-border-light);
            border-radius: var(--qtan-radius-lg);
            padding: 28px;
            transition: all var(--qtan-transition);
            box-shadow: var(--qtan-shadow-sm);
        }

        .qtan-card:hover {
            box-shadow: var(--qtan-shadow-md);
            transform: translateY(-3px);
            border-color: rgba(16, 185, 129, 0.25);
        }

        .qtan-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.3px;
            background: rgba(16, 185, 129, 0.12);
            color: var(--qtan-primary-dark);
        }

        .qtan-badge-accent {
            background: rgba(245, 158, 11, 0.12);
            color: var(--qtan-accent-dark);
        }

        .qtan-badge-muted {
            background: rgba(148, 163, 184, 0.12);
            color: var(--qtan-text-secondary);
        }

        .qtan-stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--qtan-primary);
            letter-spacing: -1px;
            line-height: 1.2;
        }

        .qtan-faq-item {
            border: 1px solid var(--qtan-border-light);
            border-radius: var(--qtan-radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--qtan-transition);
            background: var(--qtan-surface);
        }

        .qtan-faq-item:hover {
            border-color: rgba(16, 185, 129, 0.3);
        }

        .qtan-faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 700;
            font-size: 0.98rem;
            color: var(--qtan-text);
            user-select: none;
            transition: color var(--qtan-transition);
        }

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

        .qtan-faq-question i {
            color: var(--qtan-text-muted);
            transition: transform var(--qtan-transition);
            font-size: 0.85rem;
        }

        .qtan-faq-item.open .qtan-faq-question i {
            transform: rotate(180deg);
            color: var(--qtan-primary);
        }

        .qtan-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 22px;
            color: var(--qtan-text-secondary);
            line-height: 1.85;
        }

        .qtan-faq-item.open .qtan-faq-answer {
            max-height: 300px;
            padding: 0 22px 20px;
        }

        .qtan-hero {
            position: relative;
            background: linear-gradient(135deg, #063f2e 0%, #0a5a42 40%, #0d7a5a 100%);
            color: #fff;
            padding: 76px 0 90px;
            overflow: hidden;
        }

        .qtan-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: rgba(16, 185, 129, 0.18);
            pointer-events: none;
        }

        .qtan-hero::after {
            content: '';
            position: absolute;
            bottom: -160px;
            left: -100px;
            width: 380px;
            height: 380px;
            border-radius: 50%;
            background: rgba(245, 158, 11, 0.1);
            pointer-events: none;
        }

        .qtan-hero-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .qtan-footer {
            background: #0c1f17;
            color: #cbd5e1;
            padding: 60px 0 28px;
            font-size: 0.9rem;
        }

        .qtan-footer h5 {
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .qtan-footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 40px;
        }

        .qtan-footer-brand {
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
        }

        .qtan-footer-desc {
            color: #94a3b8;
            line-height: 1.85;
            font-size: 0.88rem;
            max-width: 320px;
        }

        .qtan-footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .qtan-footer-links a {
            color: #94a3b8;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: color var(--qtan-transition);
            font-size: 0.88rem;
        }

        .qtan-footer-links a:hover {
            color: var(--qtan-primary-light);
        }

        .qtan-footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 22px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 14px;
        }

        .qtan-footer-bottom-links {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            color: #64748b;
            font-size: 0.82rem;
        }

        .qtan-footer-bottom-links a {
            color: #94a3b8;
            transition: color var(--qtan-transition);
        }

        .qtan-footer-bottom-links a:hover {
            color: var(--qtan-primary-light);
        }

        .qtan-form-input {
            width: 100%;
            padding: 14px 18px;
            border: 1px solid var(--qtan-border);
            border-radius: var(--qtan-radius-sm);
            background: var(--qtan-surface);
            color: var(--qtan-text);
            font-size: 0.95rem;
            transition: all var(--qtan-transition);
            outline: none;
        }

        .qtan-form-input:focus {
            border-color: var(--qtan-primary);
            box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.12);
        }

        .qtan-form-input::placeholder {
            color: var(--qtan-text-muted);
        }

        .qtan-form-label {
            font-weight: 700;
            font-size: 0.88rem;
            color: var(--qtan-text-secondary);
            margin-bottom: 6px;
            display: block;
        }

        .qtan-time-slot {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 18px;
            border: 1.5px solid var(--qtan-border);
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--qtan-text-secondary);
            cursor: pointer;
            transition: all var(--qtan-transition);
            background: var(--qtan-surface);
        }

        .qtan-time-slot:hover {
            border-color: var(--qtan-primary);
            color: var(--qtan-primary);
        }

        .qtan-time-slot.selected {
            background: rgba(16, 185, 129, 0.12);
            border-color: var(--qtan-primary);
            color: var(--qtan-primary-dark);
        }

        .qtan-comparison-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            background: var(--qtan-surface);
            border-radius: var(--qtan-radius-lg);
            overflow: hidden;
            box-shadow: var(--qtan-shadow-md);
            border: 1px solid var(--qtan-border-light);
        }

        .qtan-comparison-table th,
        .qtan-comparison-table td {
            padding: 16px 20px;
            text-align: left;
            border-bottom: 1px solid var(--qtan-border-light);
        }

        .qtan-comparison-table th {
            background: rgba(16, 185, 129, 0.06);
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--qtan-text);
        }

        .qtan-comparison-table td {
            color: var(--qtan-text-secondary);
            font-size: 0.9rem;
        }

        .qtan-comparison-table tr:last-child td {
            border-bottom: none;
        }

        @media (max-width: 1024px) {
            .qtan-hero-content {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .qtan-nav-links {
                display: none;
            }
            .qtan-mobile-toggle {
                display: inline-flex;
            }
            .qtan-nav-cta {
                display: none;
            }
            .qtan-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            .qtan-section {
                padding: 48px 0;
            }
            .qtan-section-title {
                font-size: 1.6rem;
            }
            .qtan-hero {
                padding: 50px 0 60px;
            }
            .qtan-footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .qtan-footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .qtan-comparison-table th,
            .qtan-comparison-table td {
                padding: 12px 14px;
                font-size: 0.8rem;
            }
        }

        @media (max-width: 520px) {
            .qtan-container {
                padding: 0 14px;
            }
            .qtan-btn-primary,
            .qtan-btn-outline {
                padding: 10px 20px;
                font-size: 0.85rem;
                width: 100%;
                justify-content: center;
            }
            .qtan-stat-number {
                font-size: 1.8rem;
            }
        }