/* roulang page: index */
:root {
            --qtx-blue: #5B8DEF;
            --qtx-blue-dark: #4A7BD8;
            --qtx-blue-light: #EAF1FD;
            --qtx-green: #3BA55D;
            --qtx-green-light: #E8F5ED;
            --qtx-orange: #F28C38;
            --qtx-orange-light: #FFF4E8;
            --qtx-bg: #F5F8FC;
            --qtx-white: #FFFFFF;
            --qtx-text: #1A2B3C;
            --qtx-text-secondary: #5A6B7C;
            --qtx-text-muted: #8A9AAB;
            --qtx-border: #E3EAF2;
            --qtx-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --qtx-shadow-md: 0 8px 20px rgba(0, 0, 0, 0.08);
            --qtx-shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
            --qtx-radius: 12px;
            --qtx-radius-sm: 8px;
            --qtx-radius-lg: 20px;
            --qtx-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --qtx-transition: all 0.3s ease;
            --qtx-max-width: 1140px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--qtx-font);
            color: var(--qtx-text);
            background: var(--qtx-bg);
            line-height: 1.7;
            font-size: 0.98rem;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--qtx-radius);
        }

        button,
        input,
        textarea,
        select {
            font-family: var(--qtx-font);
        }

        .qtx-container {
            max-width: var(--qtx-max-width);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

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

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

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

        .qtx-section-title-wrap {
            margin-bottom: 40px;
        }

        .qtx-section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 14px;
        }

        .qtx-section-title {
            font-size: 1.5rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--qtx-text);
            margin-bottom: 12px;
        }

        .qtx-section-desc {
            font-size: 0.98rem;
            color: var(--qtx-text-secondary);
            max-width: 720px;
            line-height: 1.8;
        }

        .qtx-section-desc.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .qtx-section-title-wrap.center {
            text-align: center;
        }

        .qtx-section-title-wrap.center .qtx-section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* Navigation */
        .qtx-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.3);
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.05);
            transition: var(--qtx-transition);
        }

        .qtx-header.scrolled {
            background: rgba(255, 255, 255, 0.97);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
            border-bottom-color: var(--qtx-border);
        }

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

        .qtx-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--qtx-text);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.01em;
        }

        .qtx-logo .qtx-logo-icon {
            width: 36px;
            height: 36px;
            background: var(--qtx-blue);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

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

        .qtx-nav-menu li a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--qtx-text-secondary);
            border-radius: var(--qtx-radius-sm);
            transition: var(--qtx-transition);
            position: relative;
        }

        .qtx-nav-menu li a:hover {
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
        }

        .qtx-nav-menu li a.active {
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
            font-weight: 600;
        }

        .qtx-nav-cta {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .qtx-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            font-size: 0.92rem;
            font-weight: 600;
            border-radius: var(--qtx-radius-sm);
            border: none;
            cursor: pointer;
            transition: var(--qtx-transition);
            text-align: center;
            white-space: nowrap;
            line-height: 1.5;
        }

        .qtx-btn:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(91, 141, 239, 0.25);
        }

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

        .qtx-btn-primary:hover {
            background: var(--qtx-blue-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(91, 141, 239, 0.3);
        }

        .qtx-btn-outline {
            background: transparent;
            color: var(--qtx-blue);
            border: 1.5px solid var(--qtx-blue);
        }

        .qtx-btn-outline:hover {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue-dark);
            transform: translateY(-1px);
        }

        .qtx-btn-orange {
            background: var(--qtx-orange);
            color: #fff;
            border: 1.5px solid var(--qtx-orange);
        }

        .qtx-btn-orange:hover {
            background: #E07B28;
            border-color: #E07B28;
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(242, 140, 56, 0.35);
        }

        .qtx-btn-sm {
            padding: 7px 16px;
            font-size: 0.85rem;
        }
        .qtx-btn-lg {
            padding: 14px 32px;
            font-size: 1rem;
        }

        .qtx-hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--qtx-text);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--qtx-radius-sm);
            transition: var(--qtx-transition);
        }

        .qtx-hamburger:hover {
            background: var(--qtx-blue-light);
        }

        .qtx-mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid var(--qtx-border);
            padding: 12px 20px;
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
        }

        .qtx-mobile-menu ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .qtx-mobile-menu ul li a {
            display: block;
            padding: 12px 8px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--qtx-text);
            border-bottom: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius-sm);
            transition: var(--qtx-transition);
        }

        .qtx-mobile-menu ul li:last-child a {
            border-bottom: none;
        }
        .qtx-mobile-menu ul li a:hover,
        .qtx-mobile-menu ul li a.active {
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
            padding-left: 14px;
        }

        /* Hero */
        .qtx-hero {
            padding: 140px 0 80px;
            background: linear-gradient(180deg, #EDF3FD 0%, #F8FAFE 55%, #F5F8FC 100%);
            position: relative;
            overflow: hidden;
        }

        .qtx-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(91, 141, 239, 0.05) 1px, transparent 1px),
                linear-gradient(90deg, rgba(91, 141, 239, 0.05) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
        }

        .qtx-hero-grid {
            display: grid;
            grid-template-columns: 1fr 0.9fr;
            gap: 56px;
            align-items: center;
            position: relative;
            z-index: 1;
        }

        .qtx-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--qtx-blue);
            background: var(--qtx-white);
            padding: 8px 18px;
            border-radius: 50px;
            border: 1px solid var(--qtx-border);
            box-shadow: var(--qtx-shadow-sm);
            margin-bottom: 20px;
        }

        .qtx-hero h1 {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--qtx-text);
            margin-bottom: 18px;
            letter-spacing: -0.01em;
        }

        .qtx-hero-subtitle {
            font-size: 1.05rem;
            color: var(--qtx-text-secondary);
            line-height: 1.85;
            max-width: 560px;
            margin-bottom: 28px;
        }

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

        .qtx-hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
        }

        .qtx-hero-stat {
            text-align: left;
        }
        .qtx-hero-stat-number {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--qtx-blue);
            line-height: 1.2;
        }
        .qtx-hero-stat-label {
            font-size: 0.82rem;
            color: var(--qtx-text-muted);
        }

        .qtx-hero-card {
            background: var(--qtx-white);
            border-radius: var(--qtx-radius-lg);
            border: 1px solid var(--qtx-border);
            box-shadow: var(--qtx-shadow-lg);
            overflow: hidden;
        }
        .qtx-hero-card-img {
            width: 100%;
            height: 240px;
            object-fit: cover;
        }
        .qtx-hero-card-body {
            padding: 20px 24px 24px;
        }
        .qtx-hero-card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 6px;
        }
        .qtx-hero-card-text {
            font-size: 0.88rem;
            color: var(--qtx-text-secondary);
            line-height: 1.7;
        }

        /* Brand intro */
        .qtx-brand-intro {
            display: grid;
            grid-template-columns: 0.4fr 1fr;
            gap: 48px;
            align-items: start;
        }
        .qtx-brand-label {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--qtx-blue);
            letter-spacing: 0.02em;
        }
        .qtx-brand-text p {
            font-size: 1rem;
            color: var(--qtx-text-secondary);
            line-height: 1.9;
            margin-bottom: 16px;
        }
        .qtx-brand-text p:last-child {
            margin-bottom: 0;
        }

        /* Service matrix */
        .qtx-service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .qtx-service-card {
            background: var(--qtx-white);
            border-radius: var(--qtx-radius);
            border: 1px solid var(--qtx-border);
            box-shadow: var(--qtx-shadow-sm);
            padding: 24px;
            transition: var(--qtx-transition);
        }
        .qtx-service-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--qtx-shadow-md);
            border-color: rgba(91, 141, 239, 0.3);
        }
        .qtx-service-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--qtx-radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 16px;
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
        }
        .qtx-service-card:nth-child(2) .qtx-service-icon {
            background: var(--qtx-green-light);
            color: var(--qtx-green);
        }
        .qtx-service-card:nth-child(3) .qtx-service-icon {
            background: var(--qtx-orange-light);
            color: var(--qtx-orange);
        }
        .qtx-service-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 10px;
        }
        .qtx-service-card p {
            font-size: 0.9rem;
            color: var(--qtx-text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* Stats */
        .qtx-stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .qtx-stat-card {
            background: var(--qtx-white);
            border-radius: var(--qtx-radius);
            border: 1px solid var(--qtx-border);
            box-shadow: var(--qtx-shadow-sm);
            padding: 28px 24px;
            text-align: center;
            transition: var(--qtx-transition);
        }
        .qtx-stat-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--qtx-shadow-md);
        }
        .qtx-stat-number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--qtx-blue);
            line-height: 1.2;
        }
        .qtx-stat-card:nth-child(2) .qtx-stat-number {
            color: var(--qtx-green);
        }
        .qtx-stat-card:nth-child(3) .qtx-stat-number {
            color: var(--qtx-orange);
        }
        .qtx-stat-card:nth-child(4) .qtx-stat-number {
            color: #8B5CF6;
        }
        .qtx-stat-label {
            font-size: 0.88rem;
            color: var(--qtx-text-secondary);
            margin-top: 8px;
        }

        /* Process */
        .qtx-process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .qtx-process-item {
            background: var(--qtx-white);
            border-radius: var(--qtx-radius);
            border: 1px solid var(--qtx-border);
            box-shadow: var(--qtx-shadow-sm);
            padding: 28px 24px;
            position: relative;
            transition: var(--qtx-transition);
        }
        .qtx-process-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--qtx-shadow-md);
        }
        .qtx-process-step {
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
            padding: 4px 12px;
            border-radius: 50px;
            display: inline-block;
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }
        .qtx-process-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 8px;
        }
        .qtx-process-item p {
            font-size: 0.88rem;
            color: var(--qtx-text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* Case wall */
        .qtx-case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .qtx-case-card {
            background: var(--qtx-white);
            border-radius: var(--qtx-radius);
            border: 1px solid var(--qtx-border);
            box-shadow: var(--qtx-shadow-sm);
            overflow: hidden;
            transition: var(--qtx-transition);
        }
        .qtx-case-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--qtx-shadow-md);
        }
        .qtx-case-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .qtx-case-body {
            padding: 20px 24px 24px;
        }
        .qtx-case-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
            padding: 3px 12px;
            border-radius: 50px;
            margin-bottom: 10px;
        }
        .qtx-case-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 8px;
        }
        .qtx-case-card p {
            font-size: 0.88rem;
            color: var(--qtx-text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* News */
        .qtx-news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .qtx-news-item {
            background: var(--qtx-white);
            border-radius: var(--qtx-radius);
            border: 1px solid var(--qtx-border);
            box-shadow: var(--qtx-shadow-sm);
            padding: 22px 24px;
            transition: var(--qtx-transition);
            display: flex;
            flex-direction: column;
        }
        .qtx-news-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--qtx-shadow-md);
        }
        .qtx-news-date {
            font-size: 0.8rem;
            color: var(--qtx-text-muted);
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }
        .qtx-news-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .qtx-news-excerpt {
            font-size: 0.9rem;
            color: var(--qtx-text-secondary);
            line-height: 1.75;
            flex-grow: 1;
            margin-bottom: 14px;
        }
        .qtx-read-more {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--qtx-blue);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: var(--qtx-transition);
        }
        .qtx-read-more:hover {
            color: var(--qtx-blue-dark);
            gap: 8px;
        }

        /* Partners */
        .qtx-partner-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 16px;
            align-items: center;
        }
        .qtx-partner-item {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius);
            padding: 18px 16px;
            text-align: center;
            font-weight: 600;
            color: var(--qtx-text-secondary);
            font-size: 0.9rem;
            transition: var(--qtx-transition);
            min-height: 64px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--qtx-shadow-sm);
        }
        .qtx-partner-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--qtx-shadow-md);
            color: var(--qtx-blue);
            border-color: rgba(91, 141, 239, 0.3);
        }

        /* Community */
        .qtx-community-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .qtx-community-card {
            background: var(--qtx-white);
            border-radius: var(--qtx-radius);
            border: 1px solid var(--qtx-border);
            box-shadow: var(--qtx-shadow-sm);
            padding: 24px;
            transition: var(--qtx-transition);
        }
        .qtx-community-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--qtx-shadow-md);
        }
        .qtx-community-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 14px;
        }
        .qtx-community-card:nth-child(2) .qtx-community-avatar {
            background: var(--qtx-green-light);
            color: var(--qtx-green);
        }
        .qtx-community-card:nth-child(3) .qtx-community-avatar {
            background: var(--qtx-orange-light);
            color: var(--qtx-orange);
        }
        .qtx-community-text {
            font-size: 0.92rem;
            color: var(--qtx-text-secondary);
            line-height: 1.8;
            margin-bottom: 14px;
            font-style: italic;
        }
        .qtx-community-name {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--qtx-text);
        }
        .qtx-community-role {
            font-size: 0.78rem;
            color: var(--qtx-text-muted);
        }

        /* Scene */
        .qtx-scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .qtx-scene-card {
            background: var(--qtx-white);
            border-radius: var(--qtx-radius);
            border: 1px solid var(--qtx-border);
            box-shadow: var(--qtx-shadow-sm);
            overflow: hidden;
            transition: var(--qtx-transition);
        }
        .qtx-scene-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--qtx-shadow-md);
        }
        .qtx-scene-img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }
        .qtx-scene-body {
            padding: 20px 24px;
        }
        .qtx-scene-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 8px;
        }
        .qtx-scene-card p {
            font-size: 0.88rem;
            color: var(--qtx-text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* FAQ */
        .qtx-faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }
        .qtx-accordion .accordion-item {
            border: 1px solid var(--qtx-border) !important;
            border-radius: var(--qtx-radius) !important;
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--qtx-shadow-sm);
        }
        .qtx-accordion .accordion-button {
            font-size: 1rem;
            font-weight: 600;
            color: var(--qtx-text);
            padding: 18px 24px;
            background: var(--qtx-white);
            border: none;
            box-shadow: none;
            transition: var(--qtx-transition);
        }
        .qtx-accordion .accordion-button:not(.collapsed) {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
        }
        .qtx-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(91, 141, 239, 0.2);
            border: none;
        }
        .qtx-accordion .accordion-button::after {
            background-size: 1.2rem;
        }
        .qtx-accordion .accordion-body {
            font-size: 0.92rem;
            color: var(--qtx-text-secondary);
            line-height: 1.8;
            padding: 18px 24px 20px;
            background: var(--qtx-white);
        }

        /* Guarantee */
        .qtx-guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .qtx-guarantee-item {
            background: var(--qtx-white);
            border-radius: var(--qtx-radius);
            border: 1px solid var(--qtx-border);
            box-shadow: var(--qtx-shadow-sm);
            padding: 22px 20px;
            text-align: center;
            transition: var(--qtx-transition);
        }
        .qtx-guarantee-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--qtx-shadow-md);
        }
        .qtx-guarantee-icon {
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin: 0 auto 12px;
        }
        .qtx-guarantee-item:nth-child(2) .qtx-guarantee-icon {
            background: var(--qtx-green-light);
            color: var(--qtx-green);
        }
        .qtx-guarantee-item:nth-child(3) .qtx-guarantee-icon {
            background: var(--qtx-orange-light);
            color: var(--qtx-orange);
        }
        .qtx-guarantee-item h3 {
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 6px;
        }
        .qtx-guarantee-item p {
            font-size: 0.82rem;
            color: var(--qtx-text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* Insight */
        .qtx-insight-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .qtx-insight-card {
            background: var(--qtx-white);
            border-radius: var(--qtx-radius);
            border: 1px solid var(--qtx-border);
            box-shadow: var(--qtx-shadow-sm);
            padding: 24px;
            transition: var(--qtx-transition);
        }
        .qtx-insight-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--qtx-shadow-md);
        }
        .qtx-insight-label {
            font-size: 0.78rem;
            font-weight: 700;
            color: var(--qtx-blue);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 10px;
        }
        .qtx-insight-card:nth-child(2) .qtx-insight-label {
            color: var(--qtx-green);
        }
        .qtx-insight-card:nth-child(3) .qtx-insight-label {
            color: var(--qtx-orange);
        }
        .qtx-insight-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .qtx-insight-card p {
            font-size: 0.88rem;
            color: var(--qtx-text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* CTA */
        .qtx-cta-section {
            background: linear-gradient(135deg, #5B8DEF 0%, #4A7BD8 50%, #3D6EC9 100%);
            border-radius: var(--qtx-radius-lg);
            padding: 56px 48px;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .qtx-cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 80% 50%, rgba(255, 255, 255, 0.06) 0%, transparent 50%);
            pointer-events: none;
        }
        .qtx-cta-section h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: #fff;
            position: relative;
        }
        .qtx-cta-section p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.88);
            max-width: 620px;
            margin: 0 auto 28px;
            line-height: 1.8;
            position: relative;
        }
        .qtx-cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
            position: relative;
        }
        .qtx-btn-white {
            background: #fff;
            color: var(--qtx-blue);
        }
        .qtx-btn-white:hover {
            background: rgba(255, 255, 255, 0.9);
            color: var(--qtx-blue-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
        }
        .qtx-btn-outline-white {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.7);
        }
        .qtx-btn-outline-white:hover {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            transform: translateY(-1px);
        }

        /* Footer */
        .qtx-footer {
            background: #1A2B3C;
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
            font-size: 0.9rem;
        }
        .qtx-footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 0.8fr 0.8fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .qtx-footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .qtx-footer-desc {
            font-size: 0.88rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 280px;
        }
        .qtx-footer h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .qtx-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .qtx-footer ul li {
            margin-bottom: 10px;
        }
        .qtx-footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.88rem;
            transition: var(--qtx-transition);
        }
        .qtx-footer ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .qtx-footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .qtx-footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
            transition: var(--qtx-transition);
        }
        .qtx-footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .qtx-hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .qtx-hero h1 {
                font-size: 1.7rem;
            }
            .qtx-service-grid,
            .qtx-case-grid,
            .qtx-community-grid,
            .qtx-scene-grid,
            .qtx-insight-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .qtx-stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .qtx-process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .qtx-guarantee-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .qtx-partner-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .qtx-brand-intro {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .qtx-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .qtx-section {
                padding: 40px 0;
            }
            .qtx-hero {
                padding: 110px 0 50px;
            }
            .qtx-nav-menu {
                display: none;
            }
            .qtx-nav-cta .qtx-btn {
                display: none;
            }
            .qtx-hamburger {
                display: block;
            }
            .qtx-mobile-menu.open {
                display: block;
            }
            .qtx-hero h1 {
                font-size: 1.5rem;
            }
            .qtx-hero-subtitle {
                font-size: 0.95rem;
            }
            .qtx-hero-card-img {
                height: 180px;
            }
            .qtx-service-grid,
            .qtx-case-grid,
            .qtx-community-grid,
            .qtx-scene-grid,
            .qtx-insight-grid,
            .qtx-news-grid {
                grid-template-columns: 1fr;
            }
            .qtx-stats-grid,
            .qtx-process-grid,
            .qtx-guarantee-grid,
            .qtx-partner-grid {
                grid-template-columns: 1fr 1fr;
            }
            .qtx-section-title {
                font-size: 1.25rem;
            }
            .qtx-cta-section {
                padding: 36px 24px;
            }
            .qtx-cta-section h2 {
                font-size: 1.3rem;
            }
            .qtx-footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .qtx-footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .qtx-hero {
                padding: 100px 0 40px;
            }
            .qtx-hero h1 {
                font-size: 1.3rem;
            }
            .qtx-hero-stats {
                gap: 16px;
            }
            .qtx-hero-stat-number {
                font-size: 1.3rem;
            }
            .qtx-stats-grid,
            .qtx-process-grid,
            .qtx-guarantee-grid,
            .qtx-partner-grid {
                grid-template-columns: 1fr;
            }
            .qtx-nav {
                height: 60px;
            }
            .qtx-logo {
                font-size: 1.15rem;
            }
            .qtx-logo .qtx-logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.9rem;
            }
            .qtx-btn-lg {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
        }

/* roulang page: category2 */
:root {
            --qtx-blue: #5B8DEF;
            --qtx-blue-dark: #4A7BD8;
            --qtx-blue-light: #EAF1FD;
            --qtx-green: #3BA55D;
            --qtx-green-light: #E8F5ED;
            --qtx-orange: #F28C38;
            --qtx-orange-light: #FFF4E8;
            --qtx-bg: #F5F8FC;
            --qtx-white: #FFFFFF;
            --qtx-text: #1A2B3C;
            --qtx-text-secondary: #5A6B7C;
            --qtx-text-muted: #8A9AAB;
            --qtx-border: #E3EAF2;
            --qtx-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --qtx-shadow-md: 0 8px 20px rgba(0, 0, 0, 0.08);
            --qtx-shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
            --qtx-radius: 12px;
            --qtx-radius-sm: 8px;
            --qtx-radius-lg: 20px;
            --qtx-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --qtx-transition: all 0.3s ease;
            --qtx-max-width: 1140px;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--qtx-font);
            color: var(--qtx-text);
            background: var(--qtx-bg);
            line-height: 1.7;
            font-size: 0.98rem;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--qtx-radius);
        }

        button,
        input,
        textarea,
        select {
            font-family: var(--qtx-font);
        }

        .qtx-container {
            max-width: var(--qtx-max-width);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

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

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

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

        .qtx-section-title-wrap {
            margin-bottom: 40px;
        }

        .qtx-section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 14px;
        }

        .qtx-section-title {
            font-size: 1.5rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--qtx-text);
            margin-bottom: 12px;
        }

        .qtx-section-desc {
            font-size: 0.98rem;
            color: var(--qtx-text-secondary);
            max-width: 720px;
            line-height: 1.8;
        }

        .qtx-section-desc.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .qtx-section-title-wrap.center {
            text-align: center;
        }

        .qtx-section-title-wrap.center .qtx-section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* Navigation */
        .qtx-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.3);
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.05);
            transition: var(--qtx-transition);
        }

        .qtx-header.scrolled {
            background: rgba(255, 255, 255, 0.97);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
            border-bottom-color: var(--qtx-border);
        }

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

        .qtx-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--qtx-text);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.01em;
        }

        .qtx-logo .qtx-logo-icon {
            width: 36px;
            height: 36px;
            background: var(--qtx-blue);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

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

        .qtx-nav-menu li a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--qtx-text-secondary);
            border-radius: var(--qtx-radius-sm);
            transition: var(--qtx-transition);
            position: relative;
        }

        .qtx-nav-menu li a:hover {
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
        }

        .qtx-nav-menu li a.active {
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
            font-weight: 600;
        }

        .qtx-nav-cta {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .qtx-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            font-size: 0.92rem;
            font-weight: 600;
            border-radius: var(--qtx-radius-sm);
            border: none;
            cursor: pointer;
            transition: var(--qtx-transition);
            text-align: center;
            white-space: nowrap;
        }

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

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

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

        .qtx-btn-outline:hover {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue-dark);
            border-color: var(--qtx-blue-dark);
        }

        .qtx-btn-sm {
            padding: 8px 16px;
            font-size: 0.85rem;
        }

        .qtx-btn:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(91, 141, 239, 0.25);
        }

        .qtx-hamburger {
            background: none;
            border: none;
            font-size: 1.3rem;
            color: var(--qtx-text);
            cursor: pointer;
            display: none;
            padding: 6px 10px;
            border-radius: var(--qtx-radius-sm);
            transition: var(--qtx-transition);
        }

        .qtx-hamburger:hover {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
        }

        .qtx-mobile-menu {
            display: none;
            background: var(--qtx-white);
            border-bottom: 1px solid var(--qtx-border);
            box-shadow: var(--qtx-shadow-md);
        }

        .qtx-mobile-menu ul {
            list-style: none;
            padding: 12px 20px;
            margin: 0;
        }

        .qtx-mobile-menu ul li a {
            display: block;
            padding: 12px 0;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--qtx-text);
            border-bottom: 1px solid var(--qtx-border);
            transition: var(--qtx-transition);
        }

        .qtx-mobile-menu ul li:last-child a {
            border-bottom: none;
        }

        .qtx-mobile-menu ul li a:hover {
            color: var(--qtx-blue);
            padding-left: 8px;
        }

        .qtx-mobile-menu ul li a.active {
            color: var(--qtx-blue);
            font-weight: 600;
        }

        .qtx-mobile-menu.open {
            display: block;
        }

        /* Breadcrumb */
        .qtx-breadcrumb {
            padding-top: 100px;
            padding-bottom: 16px;
            background: var(--qtx-bg);
        }

        .qtx-breadcrumb .qtx-container {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--qtx-text-muted);
            flex-wrap: wrap;
        }

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

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

        .qtx-breadcrumb .separator {
            color: var(--qtx-text-muted);
            font-size: 0.75rem;
        }

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

        /* Category Hero */
        .qtx-cat-hero {
            background: linear-gradient(135deg, #F5F8FC 0%, #EAF1FD 50%, #E8F5ED 100%);
            padding: 40px 0 48px;
            border-bottom: 1px solid var(--qtx-border);
        }

        .qtx-cat-hero .qtx-container {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
        }

        .qtx-cat-hero-content h1 {
            font-size: 1.9rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--qtx-text);
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .qtx-cat-hero-content p {
            font-size: 1rem;
            color: var(--qtx-text-secondary);
            line-height: 1.8;
            max-width: 560px;
            margin-bottom: 20px;
        }

        .qtx-cat-hero-stats {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }

        .qtx-cat-hero-stat {
            display: flex;
            flex-direction: column;
        }

        .qtx-cat-hero-stat .stat-number {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--qtx-blue);
            line-height: 1.2;
        }

        .qtx-cat-hero-stat .stat-label {
            font-size: 0.82rem;
            color: var(--qtx-text-muted);
        }

        .qtx-cat-hero-image {
            position: relative;
            border-radius: var(--qtx-radius-lg);
            overflow: hidden;
            box-shadow: var(--qtx-shadow-lg);
        }

        .qtx-cat-hero-image img {
            width: 100%;
            height: 280px;
            object-fit: cover;
            border-radius: var(--qtx-radius-lg);
        }

        .qtx-cat-hero-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            background: var(--qtx-orange);
            color: #fff;
            padding: 6px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(242, 140, 56, 0.35);
        }

        /* Card Styles */
        .qtx-card {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius);
            box-shadow: var(--qtx-shadow-sm);
            transition: var(--qtx-transition);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .qtx-card:hover {
            box-shadow: var(--qtx-shadow-md);
            transform: translateY(-2px);
            border-color: #d0ddeb;
        }

        .qtx-card-image {
            position: relative;
            overflow: hidden;
            border-radius: var(--qtx-radius) var(--qtx-radius) 0 0;
        }

        .qtx-card-image img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--qtx-radius) var(--qtx-radius) 0 0;
            transition: var(--qtx-transition);
        }

        .qtx-card:hover .qtx-card-image img {
            transform: scale(1.03);
        }

        .qtx-card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--qtx-blue);
            color: #fff;
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(91, 141, 239, 0.3);
        }

        .qtx-card-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .qtx-card-category {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--qtx-green);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 8px;
        }

        .qtx-card-title {
            font-size: 1.12rem;
            font-weight: 700;
            color: var(--qtx-text);
            line-height: 1.45;
            margin-bottom: 10px;
        }

        .qtx-card-desc {
            font-size: 0.9rem;
            color: var(--qtx-text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }

        .qtx-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--qtx-text-muted);
            border-top: 1px solid var(--qtx-border);
            padding-top: 14px;
        }

        .qtx-card-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        /* Tag Cloud */
        .qtx-tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .qtx-tag {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: 50px;
            font-size: 0.82rem;
            color: var(--qtx-text-secondary);
            transition: var(--qtx-transition);
            cursor: pointer;
        }

        .qtx-tag:hover {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
            border-color: var(--qtx-blue);
        }

        .qtx-tag.highlight {
            background: var(--qtx-blue);
            color: #fff;
            border-color: var(--qtx-blue);
            font-weight: 600;
        }

        /* Subscribe CTA */
        .qtx-subscribe {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius-lg);
            padding: 40px;
            box-shadow: var(--qtx-shadow-sm);
            text-align: center;
        }

        .qtx-subscribe h3 {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 10px;
        }

        .qtx-subscribe p {
            font-size: 0.92rem;
            color: var(--qtx-text-secondary);
            margin-bottom: 22px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }

        .qtx-subscribe-form {
            display: flex;
            gap: 10px;
            max-width: 420px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }

        .qtx-subscribe-form input {
            flex: 1;
            min-width: 220px;
            padding: 10px 18px;
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius-sm);
            font-size: 0.9rem;
            color: var(--qtx-text);
            transition: var(--qtx-transition);
        }

        .qtx-subscribe-form input:focus {
            outline: none;
            border-color: var(--qtx-blue);
            box-shadow: 0 0 0 3px rgba(91, 141, 239, 0.15);
        }

        /* FAQ */
        .qtx-faq-item {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--qtx-transition);
        }

        .qtx-faq-item:hover {
            box-shadow: var(--qtx-shadow-sm);
        }

        .qtx-faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--qtx-text);
            gap: 12px;
            transition: var(--qtx-transition);
            user-select: none;
        }

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

        .qtx-faq-question .icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            transition: var(--qtx-transition);
        }

        .qtx-faq-item.active .qtx-faq-question .icon {
            transform: rotate(180deg);
            background: var(--qtx-blue);
            color: #fff;
        }

        .qtx-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
        }

        .qtx-faq-item.active .qtx-faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .qtx-faq-answer p {
            font-size: 0.9rem;
            color: var(--qtx-text-secondary);
            line-height: 1.8;
            margin: 0;
        }

        /* Pagination */
        .qtx-pagination {
            display: flex;
            justify-content: center;
            gap: 6px;
            margin-top: 32px;
            flex-wrap: wrap;
        }

        .qtx-pagination a,
        .qtx-pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 38px;
            height: 38px;
            padding: 0 12px;
            border-radius: var(--qtx-radius-sm);
            font-size: 0.88rem;
            font-weight: 500;
            transition: var(--qtx-transition);
            cursor: pointer;
        }

        .qtx-pagination a {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            color: var(--qtx-text-secondary);
        }

        .qtx-pagination a:hover {
            background: var(--qtx-blue-light);
            border-color: var(--qtx-blue);
            color: var(--qtx-blue);
        }

        .qtx-pagination .current {
            background: var(--qtx-blue);
            border: 1px solid var(--qtx-blue);
            color: #fff;
            font-weight: 600;
        }

        /* Hot Items */
        .qtx-hot-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

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

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

        .qtx-hot-list .hot-rank {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            background: var(--qtx-orange-light);
            color: var(--qtx-orange);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 700;
            margin-top: 2px;
        }

        .qtx-hot-list .hot-rank.top {
            background: var(--qtx-orange);
            color: #fff;
        }

        .qtx-hot-list .hot-content h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--qtx-text);
            margin-bottom: 4px;
            line-height: 1.5;
        }

        .qtx-hot-list .hot-content p {
            font-size: 0.82rem;
            color: var(--qtx-text-muted);
            margin: 0;
        }

        /* Related Topics */
        .qtx-topic-card {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius);
            padding: 20px;
            text-align: center;
            transition: var(--qtx-transition);
            height: 100%;
        }

        .qtx-topic-card:hover {
            box-shadow: var(--qtx-shadow-md);
            transform: translateY(-2px);
            border-color: #d0ddeb;
        }

        .qtx-topic-card .topic-icon {
            width: 48px;
            height: 48px;
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin: 0 auto 12px;
        }

        .qtx-topic-card h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--qtx-text);
            margin-bottom: 6px;
        }

        .qtx-topic-card p {
            font-size: 0.82rem;
            color: var(--qtx-text-muted);
            margin: 0;
            line-height: 1.6;
        }

        /* Overview section */
        .qtx-overview {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .qtx-overview-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 16px;
            line-height: 1.35;
        }

        .qtx-overview-content p {
            font-size: 0.98rem;
            color: var(--qtx-text-secondary);
            line-height: 1.85;
            margin-bottom: 14px;
        }

        .qtx-overview-image img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            border-radius: var(--qtx-radius-lg);
            box-shadow: var(--qtx-shadow-md);
        }

        /* Footer */
        .qtx-footer {
            background: #1A2B3C;
            color: #B8C5D1;
            padding: 60px 0 24px;
            border-top: 4px solid var(--qtx-blue);
        }

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

        .qtx-footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .qtx-footer-desc {
            font-size: 0.88rem;
            line-height: 1.8;
            color: #B8C5D1;
            max-width: 320px;
            margin-bottom: 0;
        }

        .qtx-footer h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

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

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

        .qtx-footer ul li a {
            font-size: 0.88rem;
            color: #B8C5D1;
            transition: var(--qtx-transition);
        }

        .qtx-footer ul li a:hover {
            color: var(--qtx-blue);
            padding-left: 4px;
        }

        .qtx-footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.82rem;
            flex-wrap: wrap;
            gap: 12px;
        }

        .qtx-footer-bottom a {
            color: #B8C5D1;
            transition: var(--qtx-transition);
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .qtx-cat-hero .qtx-container {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .qtx-cat-hero-image img {
                height: 220px;
            }

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

            .qtx-overview-image img {
                height: 240px;
            }

            .qtx-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            .qtx-nav-menu {
                display: none;
            }

            .qtx-hamburger {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .qtx-nav-cta .qtx-btn {
                display: none;
            }

            .qtx-section {
                padding: 40px 0;
            }

            .qtx-section-title-wrap {
                margin-bottom: 28px;
            }

            .qtx-section-title {
                font-size: 1.3rem;
            }

            .qtx-cat-hero {
                padding: 28px 0 32px;
            }

            .qtx-cat-hero-content h1 {
                font-size: 1.55rem;
            }

            .qtx-cat-hero-image img {
                height: 180px;
            }

            .qtx-breadcrumb {
                padding-top: 80px;
            }

            .qtx-card-body {
                padding: 16px 18px 18px;
            }

            .qtx-card-image img {
                height: 160px;
            }

            .qtx-subscribe {
                padding: 28px 20px;
            }

            .qtx-subscribe h3 {
                font-size: 1.15rem;
            }

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

            .qtx-footer-bottom {
                flex-direction: column;
                text-align: center;
                justify-content: center;
            }

            .qtx-cat-hero-stats {
                gap: 18px;
            }

            .qtx-hot-list li {
                flex-direction: column;
                gap: 8px;
            }
        }

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

            .qtx-card-image img {
                height: 140px;
            }

            .qtx-cat-hero-content h1 {
                font-size: 1.35rem;
            }

            .qtx-subscribe-form {
                flex-direction: column;
            }

            .qtx-subscribe-form input {
                min-width: 100%;
            }

            .qtx-overview-image img {
                height: 180px;
            }

            .qtx-pagination a,
            .qtx-pagination span {
                min-width: 32px;
                height: 32px;
                font-size: 0.8rem;
                padding: 0 8px;
            }
        }

/* roulang page: category3 */
:root {
            --qtx-blue: #5B8DEF;
            --qtx-blue-dark: #4A7BD8;
            --qtx-blue-light: #EAF1FD;
            --qtx-green: #3BA55D;
            --qtx-green-light: #E8F5ED;
            --qtx-orange: #F28C38;
            --qtx-orange-light: #FFF4E8;
            --qtx-bg: #F5F8FC;
            --qtx-white: #FFFFFF;
            --qtx-text: #1A2B3C;
            --qtx-text-secondary: #5A6B7C;
            --qtx-text-muted: #8A9AAB;
            --qtx-border: #E3EAF2;
            --qtx-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --qtx-shadow-md: 0 8px 20px rgba(0, 0, 0, 0.08);
            --qtx-shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
            --qtx-radius: 12px;
            --qtx-radius-sm: 8px;
            --qtx-radius-lg: 20px;
            --qtx-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --qtx-transition: all 0.3s ease;
            --qtx-max-width: 1140px;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--qtx-font);
            color: var(--qtx-text);
            background: var(--qtx-bg);
            line-height: 1.7;
            font-size: 0.98rem;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--qtx-radius);
        }

        button,
        input,
        textarea,
        select {
            font-family: var(--qtx-font);
        }

        .qtx-container {
            max-width: var(--qtx-max-width);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .qtx-section {
            padding: 56px 0;
        }

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

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

        .qtx-section-title-wrap {
            margin-bottom: 36px;
        }

        .qtx-section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 14px;
        }

        .qtx-section-title {
            font-size: 1.45rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--qtx-text);
            margin-bottom: 12px;
        }

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

        .qtx-section-title-wrap.center {
            text-align: center;
        }

        .qtx-section-title-wrap.center .qtx-section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* Navigation */
        .qtx-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.3);
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.05);
            transition: var(--qtx-transition);
        }

        .qtx-header.scrolled {
            background: rgba(255, 255, 255, 0.97);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
            border-bottom-color: var(--qtx-border);
        }

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

        .qtx-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--qtx-text);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.01em;
        }

        .qtx-logo .qtx-logo-icon {
            width: 36px;
            height: 36px;
            background: var(--qtx-blue);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

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

        .qtx-nav-menu li a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--qtx-text-secondary);
            border-radius: var(--qtx-radius-sm);
            transition: var(--qtx-transition);
            position: relative;
        }

        .qtx-nav-menu li a:hover {
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
        }

        .qtx-nav-menu li a.active {
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
            font-weight: 600;
        }

        .qtx-nav-cta {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .qtx-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            font-size: 0.92rem;
            font-weight: 600;
            border-radius: var(--qtx-radius-sm);
            border: none;
            cursor: pointer;
            transition: var(--qtx-transition);
            text-align: center;
            white-space: nowrap;
        }

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

        .qtx-btn-primary:hover {
            background: var(--qtx-blue-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(91, 141, 239, 0.3);
        }

        .qtx-btn-outline {
            background: transparent;
            color: var(--qtx-blue);
            border: 1.5px solid var(--qtx-blue);
        }

        .qtx-btn-outline:hover {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue-dark);
            border-color: var(--qtx-blue-dark);
        }

        .qtx-btn-sm {
            padding: 8px 16px;
            font-size: 0.85rem;
        }

        .qtx-btn:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(91, 141, 239, 0.25);
        }

        .qtx-hamburger {
            display: none;
            background: transparent;
            border: none;
            font-size: 1.3rem;
            color: var(--qtx-text);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
            transition: var(--qtx-transition);
        }

        .qtx-hamburger:hover {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
        }

        .qtx-mobile-menu {
            display: none;
            background: var(--qtx-white);
            border-top: 1px solid var(--qtx-border);
            box-shadow: var(--qtx-shadow-md);
        }

        .qtx-mobile-menu ul {
            list-style: none;
            margin: 0;
            padding: 12px 0;
        }

        .qtx-mobile-menu ul li a {
            display: block;
            padding: 12px 20px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--qtx-text-secondary);
            border-radius: 0;
            transition: var(--qtx-transition);
        }

        .qtx-mobile-menu ul li a:hover,
        .qtx-mobile-menu ul li a.active {
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
        }

        .qtx-mobile-menu.open {
            display: block;
        }

        /* Breadcrumb */
        .qtx-breadcrumb-bar {
            padding: 100px 0 20px;
            background: var(--qtx-bg);
        }

        .qtx-breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            font-size: 0.86rem;
            color: var(--qtx-text-muted);
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .qtx-breadcrumb li {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .qtx-breadcrumb li:not(:last-child)::after {
            content: '/';
            color: var(--qtx-text-muted);
            margin-left: 4px;
        }

        .qtx-breadcrumb li a {
            color: var(--qtx-text-secondary);
            transition: var(--qtx-transition);
        }

        .qtx-breadcrumb li a:hover {
            color: var(--qtx-blue);
        }

        .qtx-breadcrumb li span {
            color: var(--qtx-text);
            font-weight: 500;
        }

        /* Category header */
        .qtx-cat-header {
            padding: 24px 0 40px;
            background: var(--qtx-bg);
        }

        .qtx-cat-header-inner {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
        }

        .qtx-cat-header-text h1 {
            font-size: 1.85rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .qtx-cat-header-text p {
            font-size: 0.98rem;
            color: var(--qtx-text-secondary);
            line-height: 1.8;
            max-width: 620px;
            margin-bottom: 0;
        }

        .qtx-cat-header-visual {
            position: relative;
            border-radius: var(--qtx-radius-lg);
            overflow: hidden;
            min-height: 220px;
            background-image: url('/assets/images/9e47084e46babe19.webp');
            background-size: cover;
            background-position: center;
            box-shadow: var(--qtx-shadow-md);
        }

        .qtx-cat-header-visual::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 43, 60, 0.65) 0%, rgba(26, 43, 60, 0.25) 100%);
        }

        .qtx-cat-header-visual-content {
            position: relative;
            z-index: 1;
            color: #fff;
            padding: 32px;
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            min-height: 220px;
        }

        .qtx-cat-header-visual-content span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: var(--qtx-orange);
            background: rgba(255, 255, 255, 0.92);
            padding: 4px 12px;
            border-radius: 50px;
            margin-bottom: auto;
            align-self: flex-start;
        }

        .qtx-cat-header-visual-content h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .qtx-cat-header-visual-content p {
            font-size: 0.85rem;
            opacity: 0.88;
            margin-bottom: 0;
        }

        /* Filter bar */
        .qtx-filter-bar {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius);
            padding: 18px 24px;
            margin-bottom: 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 14px;
            box-shadow: var(--qtx-shadow-sm);
        }

        .qtx-filter-tags {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .qtx-filter-tag {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--qtx-text-secondary);
            background: var(--qtx-bg);
            border-radius: 50px;
            border: 1px solid transparent;
            cursor: pointer;
            transition: var(--qtx-transition);
        }

        .qtx-filter-tag:hover {
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
        }

        .qtx-filter-tag.active {
            color: #fff;
            background: var(--qtx-blue);
            font-weight: 600;
        }

        .qtx-search-box {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .qtx-search-box input {
            padding: 8px 16px;
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius-sm);
            font-size: 0.88rem;
            color: var(--qtx-text);
            width: 200px;
            transition: var(--qtx-transition);
            background: var(--qtx-bg);
        }

        .qtx-search-box input:focus {
            outline: none;
            border-color: var(--qtx-blue);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(91, 141, 239, 0.15);
        }

        .qtx-search-box button {
            padding: 8px 16px;
            background: var(--qtx-blue);
            color: #fff;
            border: none;
            border-radius: var(--qtx-radius-sm);
            cursor: pointer;
            font-size: 0.88rem;
            transition: var(--qtx-transition);
        }

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

        /* Review cards */
        .qtx-review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

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

        .qtx-review-card:hover {
            box-shadow: var(--qtx-shadow-md);
            transform: translateY(-2px);
            border-color: rgba(91, 141, 239, 0.3);
        }

        .qtx-review-card-img {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            border-radius: 0;
        }

        .qtx-review-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: var(--qtx-transition);
        }

        .qtx-review-card:hover .qtx-review-card-img img {
            transform: scale(1.03);
        }

        .qtx-review-card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--qtx-blue);
            color: #fff;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 50px;
            letter-spacing: 0.03em;
        }

        .qtx-review-card-badge.green {
            background: var(--qtx-green);
        }

        .qtx-review-card-badge.orange {
            background: var(--qtx-orange);
        }

        .qtx-review-card-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .qtx-review-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--qtx-text-muted);
            margin-bottom: 8px;
        }

        .qtx-review-card-meta i {
            font-size: 0.75rem;
            color: var(--qtx-blue);
        }

        .qtx-review-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.45;
            color: var(--qtx-text);
            margin-bottom: 8px;
            transition: var(--qtx-transition);
        }

        .qtx-review-card h3 a {
            color: var(--qtx-text);
        }

        .qtx-review-card h3 a:hover {
            color: var(--qtx-blue);
        }

        .qtx-review-card p {
            font-size: 0.88rem;
            color: var(--qtx-text-secondary);
            line-height: 1.75;
            flex: 1;
            margin-bottom: 14px;
        }

        .qtx-review-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--qtx-border);
        }

        .qtx-review-card-score {
            display: flex;
            align-items: center;
            gap: 4px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--qtx-text);
        }

        .qtx-review-card-score i {
            color: var(--qtx-orange);
            font-size: 0.75rem;
        }

        .qtx-review-card-link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--qtx-blue);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: var(--qtx-transition);
        }

        .qtx-review-card-link:hover {
            color: var(--qtx-blue-dark);
            gap: 8px;
        }

        /* Hot list */
        .qtx-hot-list {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius);
            padding: 24px;
            box-shadow: var(--qtx-shadow-sm);
        }

        .qtx-hot-list h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .qtx-hot-list h3 i {
            color: var(--qtx-orange);
        }

        .qtx-hot-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 0;
            border-bottom: 1px solid var(--qtx-border);
            transition: var(--qtx-transition);
        }

        .qtx-hot-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .qtx-hot-item:hover {
            padding-left: 6px;
        }

        .qtx-hot-item-rank {
            width: 30px;
            height: 30px;
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        .qtx-hot-item-rank.top {
            background: var(--qtx-orange-light);
            color: var(--qtx-orange);
        }

        .qtx-hot-item-info {
            flex: 1;
            min-width: 0;
        }

        .qtx-hot-item-info a {
            display: block;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--qtx-text);
            line-height: 1.4;
            transition: var(--qtx-transition);
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .qtx-hot-item-info a:hover {
            color: var(--qtx-blue);
        }

        .qtx-hot-item-info span {
            font-size: 0.76rem;
            color: var(--qtx-text-muted);
        }

        /* Tag cloud */
        .qtx-tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .qtx-tag {
            display: inline-flex;
            align-items: center;
            padding: 7px 16px;
            font-size: 0.84rem;
            font-weight: 500;
            color: var(--qtx-text-secondary);
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: 50px;
            transition: var(--qtx-transition);
            cursor: pointer;
        }

        .qtx-tag:hover {
            color: var(--qtx-blue);
            border-color: var(--qtx-blue);
            background: var(--qtx-blue-light);
            transform: translateY(-1px);
        }

        /* Related topics */
        .qtx-topic-card {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius);
            overflow: hidden;
            box-shadow: var(--qtx-shadow-sm);
            transition: var(--qtx-transition);
            height: 100%;
        }

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

        .qtx-topic-card-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            border-radius: 0;
        }

        .qtx-topic-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: var(--qtx-transition);
        }

        .qtx-topic-card:hover .qtx-topic-card-img img {
            transform: scale(1.04);
        }

        .qtx-topic-card-body {
            padding: 18px 20px 20px;
        }

        .qtx-topic-card-body h4 {
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .qtx-topic-card-body p {
            font-size: 0.84rem;
            color: var(--qtx-text-secondary);
            margin-bottom: 0;
            line-height: 1.65;
        }

        /* Subscribe CTA */
        .qtx-cta-section {
            background: linear-gradient(135deg, #EAF1FD 0%, #F5F8FC 60%, #E8F5ED 100%);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius-lg);
            padding: 40px;
            position: relative;
            overflow: hidden;
        }

        .qtx-cta-section::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 180px;
            height: 180px;
            background: rgba(91, 141, 239, 0.1);
            border-radius: 50%;
        }

        .qtx-cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: 20%;
            width: 120px;
            height: 120px;
            background: rgba(59, 165, 93, 0.08);
            border-radius: 50%;
        }

        .qtx-cta-inner {
            display: flex;
            align-items: center;
            gap: 32px;
            position: relative;
            z-index: 1;
            flex-wrap: wrap;
        }

        .qtx-cta-text {
            flex: 1;
            min-width: 280px;
        }

        .qtx-cta-text h2 {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 8px;
        }

        .qtx-cta-text p {
            font-size: 0.92rem;
            color: var(--qtx-text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }

        .qtx-cta-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            min-width: 280px;
        }

        .qtx-cta-form input {
            flex: 1;
            min-width: 200px;
            padding: 12px 18px;
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius-sm);
            font-size: 0.92rem;
            background: #fff;
            transition: var(--qtx-transition);
        }

        .qtx-cta-form input:focus {
            outline: none;
            border-color: var(--qtx-blue);
            box-shadow: 0 0 0 3px rgba(91, 141, 239, 0.15);
        }

        .qtx-cta-form .qtx-btn {
            padding: 12px 28px;
        }

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

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

        .qtx-faq-item:hover {
            border-color: rgba(91, 141, 239, 0.35);
        }

        .qtx-faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            font-size: 0.96rem;
            font-weight: 600;
            color: var(--qtx-text);
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--qtx-transition);
        }

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

        .qtx-faq-question i {
            color: var(--qtx-blue);
            font-size: 0.85rem;
            transition: var(--qtx-transition);
            flex-shrink: 0;
        }

        .qtx-faq-item.open .qtx-faq-question i {
            transform: rotate(180deg);
        }

        .qtx-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
        }

        .qtx-faq-item.open .qtx-faq-answer {
            max-height: 400px;
            padding: 0 24px 18px;
        }

        .qtx-faq-answer p {
            font-size: 0.9rem;
            color: var(--qtx-text-secondary);
            line-height: 1.8;
            margin-bottom: 0;
            border-top: 1px solid var(--qtx-border);
            padding-top: 14px;
        }

        /* Pagination */
        .qtx-pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            flex-wrap: wrap;
            padding: 8px 0;
        }

        .qtx-pagination a,
        .qtx-pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 14px;
            font-size: 0.88rem;
            font-weight: 500;
            border-radius: var(--qtx-radius-sm);
            border: 1px solid var(--qtx-border);
            color: var(--qtx-text-secondary);
            transition: var(--qtx-transition);
            background: var(--qtx-white);
        }

        .qtx-pagination a:hover {
            color: var(--qtx-blue);
            border-color: var(--qtx-blue);
            background: var(--qtx-blue-light);
        }

        .qtx-pagination span.current {
            background: var(--qtx-blue);
            color: #fff;
            border-color: var(--qtx-blue);
            font-weight: 600;
        }

        .qtx-pagination span.dots {
            border: none;
            background: transparent;
            min-width: 30px;
            padding: 0;
            color: var(--qtx-text-muted);
        }

        /* Footer */
        .qtx-footer {
            background: #1A2B3C;
            color: rgba(255, 255, 255, 0.8);
            padding: 48px 0 24px;
            margin-top: 40px;
        }

        .qtx-footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }

        .qtx-footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .qtx-footer-desc {
            font-size: 0.88rem;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 0;
            max-width: 300px;
        }

        .qtx-footer h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

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

        .qtx-footer ul li {
            margin-bottom: 8px;
        }

        .qtx-footer ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.65);
            transition: var(--qtx-transition);
        }

        .qtx-footer ul li a:hover {
            color: var(--qtx-blue);
            padding-left: 4px;
        }

        .qtx-footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.5);
        }

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

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

        /* Responsive */
        @media (max-width: 1024px) {
            .qtx-review-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .qtx-cat-header-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }

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

        @media (max-width: 768px) {
            .qtx-nav-menu {
                display: none;
            }

            .qtx-nav-cta .qtx-btn {
                display: none;
            }

            .qtx-hamburger {
                display: block;
            }

            .qtx-section {
                padding: 40px 0;
            }

            .qtx-review-grid {
                grid-template-columns: 1fr;
            }

            .qtx-filter-bar {
                flex-direction: column;
                align-items: stretch;
            }

            .qtx-search-box input {
                width: 100%;
                flex: 1;
            }

            .qtx-search-box {
                width: 100%;
            }

            .qtx-search-box button {
                flex-shrink: 0;
            }

            .qtx-cta-section {
                padding: 28px 20px;
            }

            .qtx-cta-inner {
                flex-direction: column;
                align-items: stretch;
                gap: 20px;
            }

            .qtx-cta-form {
                min-width: 100%;
            }

            .qtx-cta-form input {
                min-width: 100%;
            }

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

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

            .qtx-cat-header-text h1 {
                font-size: 1.5rem;
            }

            .qtx-pagination a,
            .qtx-pagination span {
                min-width: 34px;
                height: 34px;
                padding: 0 10px;
                font-size: 0.8rem;
            }
        }

        @media (max-width: 520px) {
            .qtx-container {
                padding-left: 14px;
                padding-right: 14px;
            }

            .qtx-section {
                padding: 32px 0;
            }

            .qtx-section-title {
                font-size: 1.25rem;
            }

            .qtx-section-title-wrap {
                margin-bottom: 24px;
            }

            .qtx-review-card-body {
                padding: 16px 16px 18px;
            }

            .qtx-review-card h3 {
                font-size: 0.95rem;
            }

            .qtx-breadcrumb-bar {
                padding: 88px 0 14px;
            }

            .qtx-cat-header {
                padding: 14px 0 28px;
            }

            .qtx-cat-header-text h1 {
                font-size: 1.3rem;
            }

            .qtx-faq-question {
                padding: 14px 16px;
                font-size: 0.88rem;
            }

            .qtx-faq-answer {
                padding: 0 16px;
            }

            .qtx-faq-item.open .qtx-faq-answer {
                padding: 0 16px 14px;
            }

            .qtx-hot-list {
                padding: 18px;
            }

            .qtx-topic-card-body {
                padding: 14px 16px 16px;
            }
        }

/* roulang page: category1 */
:root {
            --qtx-blue: #5B8DEF;
            --qtx-blue-dark: #4A7BD8;
            --qtx-blue-light: #EAF1FD;
            --qtx-green: #3BA55D;
            --qtx-green-light: #E8F5ED;
            --qtx-orange: #F28C38;
            --qtx-orange-light: #FFF4E8;
            --qtx-bg: #F5F8FC;
            --qtx-white: #FFFFFF;
            --qtx-text: #1A2B3C;
            --qtx-text-secondary: #5A6B7C;
            --qtx-text-muted: #8A9AAB;
            --qtx-border: #E3EAF2;
            --qtx-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --qtx-shadow-md: 0 8px 20px rgba(0, 0, 0, 0.08);
            --qtx-shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
            --qtx-radius: 12px;
            --qtx-radius-sm: 8px;
            --qtx-radius-lg: 20px;
            --qtx-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --qtx-transition: all 0.3s ease;
            --qtx-max-width: 1140px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--qtx-font);
            color: var(--qtx-text);
            background: var(--qtx-bg);
            line-height: 1.7;
            font-size: 0.98rem;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

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

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--qtx-radius);
        }

        button,
        input,
        textarea,
        select {
            font-family: var(--qtx-font);
        }

        .qtx-container {
            max-width: var(--qtx-max-width);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

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

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

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

        .qtx-section-title-wrap {
            margin-bottom: 40px;
        }

        .qtx-section-title-wrap.center {
            text-align: center;
        }

        .qtx-section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 14px;
        }

        .qtx-section-title {
            font-size: 1.5rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--qtx-text);
            margin-bottom: 12px;
        }

        .qtx-section-desc {
            font-size: 0.98rem;
            color: var(--qtx-text-secondary);
            max-width: 720px;
            line-height: 1.8;
        }

        .qtx-section-desc.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .qtx-section-title-wrap.center .qtx-section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* Navigation */
        .qtx-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--qtx-border);
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
            transition: var(--qtx-transition);
        }

        .qtx-header.scrolled {
            background: rgba(255, 255, 255, 0.97);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
            border-bottom-color: var(--qtx-border);
        }

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

        .qtx-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--qtx-text);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.01em;
        }

        .qtx-logo .qtx-logo-icon {
            width: 36px;
            height: 36px;
            background: var(--qtx-blue);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

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

        .qtx-nav-menu li a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--qtx-text-secondary);
            border-radius: var(--qtx-radius-sm);
            transition: var(--qtx-transition);
            position: relative;
        }

        .qtx-nav-menu li a:hover {
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
        }

        .qtx-nav-menu li a.active {
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
            font-weight: 600;
        }

        .qtx-nav-cta {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .qtx-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            font-size: 0.92rem;
            font-weight: 600;
            border-radius: var(--qtx-radius-sm);
            border: none;
            cursor: pointer;
            transition: var(--qtx-transition);
            text-align: center;
            white-space: nowrap;
            line-height: 1.4;
        }

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

        .qtx-btn-primary:hover {
            background: var(--qtx-blue-dark);
            color: #fff;
            box-shadow: 0 4px 12px rgba(91, 141, 239, 0.35);
        }

        .qtx-btn-sm {
            padding: 8px 16px;
            font-size: 0.85rem;
        }

        .qtx-btn-outline {
            background: transparent;
            color: var(--qtx-blue);
            border: 1px solid var(--qtx-blue);
        }

        .qtx-btn-outline:hover {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue-dark);
            border-color: var(--qtx-blue-dark);
        }

        .qtx-btn:focus-visible,
        .qtx-nav-menu li a:focus-visible,
        .qtx-hamburger:focus-visible {
            outline: 3px solid rgba(91, 141, 239, 0.25);
            outline-offset: 2px;
        }

        .qtx-hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--qtx-text);
            cursor: pointer;
            padding: 6px 10px;
            border-radius: var(--qtx-radius-sm);
            transition: var(--qtx-transition);
        }

        .qtx-hamburger:hover {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
        }

        .qtx-mobile-menu {
            display: none;
            background: var(--qtx-white);
            border-bottom: 1px solid var(--qtx-border);
            box-shadow: var(--qtx-shadow-md);
            padding: 10px 20px 16px;
        }

        .qtx-mobile-menu ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .qtx-mobile-menu ul li a {
            display: block;
            padding: 10px 12px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--qtx-text-secondary);
            border-radius: var(--qtx-radius-sm);
            transition: var(--qtx-transition);
        }

        .qtx-mobile-menu ul li a:hover,
        .qtx-mobile-menu ul li a.active {
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
        }

        .qtx-mobile-menu.open {
            display: block;
        }

        /* Page header / breadcrumb */
        .qtx-page-header {
            padding: 110px 0 48px;
            background: var(--qtx-white);
            border-bottom: 1px solid var(--qtx-border);
            position: relative;
            overflow: hidden;
        }

        .qtx-page-header::after {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(91, 141, 239, 0.07) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .qtx-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0 0 18px;
            padding: 0;
            font-size: 0.85rem;
            color: var(--qtx-text-muted);
            flex-wrap: wrap;
        }

        .qtx-breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .qtx-breadcrumb li:not(:last-child)::after {
            content: '/';
            color: var(--qtx-border);
            font-weight: 400;
        }

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

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

        .qtx-breadcrumb li:last-child {
            color: var(--qtx-blue);
            font-weight: 500;
        }

        .qtx-page-title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--qtx-text);
            margin: 0 0 12px;
            letter-spacing: -0.01em;
        }

        .qtx-page-subtitle {
            font-size: 1.05rem;
            color: var(--qtx-text-secondary);
            max-width: 680px;
            line-height: 1.8;
            margin: 0;
        }

        /* Article cards */
        .qtx-article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .qtx-article-card {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius);
            box-shadow: var(--qtx-shadow-sm);
            overflow: hidden;
            transition: var(--qtx-transition);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .qtx-article-card:hover {
            box-shadow: var(--qtx-shadow-md);
            transform: translateY(-2px);
            border-color: rgba(91, 141, 239, 0.3);
        }

        .qtx-article-card-img {
            border-radius: 0;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            width: 100%;
        }

        .qtx-article-card-body {
            padding: 20px 20px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .qtx-article-date {
            font-size: 0.78rem;
            font-weight: 500;
            color: var(--qtx-text-muted);
            letter-spacing: 0.03em;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .qtx-article-date i {
            color: var(--qtx-blue);
            font-size: 0.72rem;
        }

        .qtx-article-card-title {
            font-size: 1.1rem;
            font-weight: 700;
            line-height: 1.45;
            color: var(--qtx-text);
            margin-bottom: 10px;
        }

        .qtx-article-card-title a {
            color: var(--qtx-text);
        }

        .qtx-article-card-title a:hover {
            color: var(--qtx-blue);
        }

        .qtx-article-card-excerpt {
            font-size: 0.9rem;
            color: var(--qtx-text-secondary);
            line-height: 1.75;
            margin-bottom: 16px;
            flex: 1;
        }

        .qtx-article-readmore {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--qtx-blue);
            transition: var(--qtx-transition);
        }

        .qtx-article-readmore:hover {
            color: var(--qtx-blue-dark);
            gap: 10px;
        }

        .qtx-article-readmore i {
            font-size: 0.72rem;
            transition: var(--qtx-transition);
        }

        /* Hot items */
        .qtx-hot-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .qtx-hot-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 14px 16px;
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius-sm);
            margin-bottom: 10px;
            transition: var(--qtx-transition);
        }

        .qtx-hot-item:hover {
            box-shadow: var(--qtx-shadow-sm);
            border-color: rgba(91, 141, 239, 0.3);
            transform: translateX(4px);
        }

        .qtx-hot-rank {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.88rem;
            flex-shrink: 0;
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
        }

        .qtx-hot-rank.rank-1 {
            background: var(--qtx-orange-light);
            color: var(--qtx-orange);
        }

        .qtx-hot-rank.rank-2 {
            background: var(--qtx-green-light);
            color: var(--qtx-green);
        }

        .qtx-hot-rank.rank-3 {
            background: #FEF3E2;
            color: #D4833A;
        }

        .qtx-hot-info {
            flex: 1;
            min-width: 0;
        }

        .qtx-hot-title {
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--qtx-text);
            margin: 0 0 2px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .qtx-hot-meta {
            font-size: 0.78rem;
            color: var(--qtx-text-muted);
        }

        /* Tags */
        .qtx-tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .qtx-tag {
            display: inline-block;
            padding: 6px 14px;
            font-size: 0.82rem;
            font-weight: 500;
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: 50px;
            color: var(--qtx-text-secondary);
            cursor: pointer;
            transition: var(--qtx-transition);
        }

        .qtx-tag:hover {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
            border-color: var(--qtx-blue);
        }

        /* Topic cards */
        .qtx-topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .qtx-topic-card {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius);
            overflow: hidden;
            box-shadow: var(--qtx-shadow-sm);
            transition: var(--qtx-transition);
            height: 100%;
        }

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

        .qtx-topic-card-img {
            border-radius: 0;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            width: 100%;
        }

        .qtx-topic-card-body {
            padding: 20px;
        }

        .qtx-topic-card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin: 0 0 8px;
        }

        .qtx-topic-card-desc {
            font-size: 0.88rem;
            color: var(--qtx-text-secondary);
            line-height: 1.7;
            margin: 0 0 12px;
        }

        .qtx-topic-link {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--qtx-blue);
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .qtx-topic-link:hover {
            color: var(--qtx-blue-dark);
        }

        /* Subscribe CTA */
        .qtx-subscribe-card {
            background: linear-gradient(135deg, var(--qtx-blue) 0%, var(--qtx-blue-dark) 100%);
            border-radius: var(--qtx-radius-lg);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }

        .qtx-subscribe-card::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
            pointer-events: none;
        }

        .qtx-subscribe-card::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: 20%;
            width: 250px;
            height: 250px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
            pointer-events: none;
        }

        .qtx-subscribe-content {
            position: relative;
            z-index: 1;
            flex: 1;
            min-width: 240px;
        }

        .qtx-subscribe-title {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 8px;
        }

        .qtx-subscribe-desc {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.85);
            margin: 0;
            line-height: 1.7;
        }

        .qtx-subscribe-form {
            display: flex;
            gap: 10px;
            align-items: center;
            position: relative;
            z-index: 1;
            flex-wrap: wrap;
        }

        .qtx-subscribe-input {
            padding: 12px 18px;
            border-radius: var(--qtx-radius-sm);
            border: 2px solid rgba(255, 255, 255, 0.4);
            background: rgba(255, 255, 255, 0.95);
            font-size: 0.92rem;
            width: 260px;
            max-width: 100%;
            color: var(--qtx-text);
            outline: none;
            transition: var(--qtx-transition);
        }

        .qtx-subscribe-input::placeholder {
            color: var(--qtx-text-muted);
        }

        .qtx-subscribe-input:focus {
            border-color: #fff;
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
        }

        .qtx-btn-white {
            background: #fff;
            color: var(--qtx-blue);
            font-weight: 600;
            padding: 12px 22px;
            border-radius: var(--qtx-radius-sm);
            border: none;
            cursor: pointer;
            transition: var(--qtx-transition);
            white-space: nowrap;
        }

        .qtx-btn-white:hover {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue-dark);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }

        /* FAQ */
        .qtx-faq-list {
            max-width: 780px;
            margin: 0 auto;
        }

        .qtx-faq-item {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--qtx-transition);
        }

        .qtx-faq-item:hover {
            border-color: rgba(91, 141, 239, 0.3);
            box-shadow: var(--qtx-shadow-sm);
        }

        .qtx-faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 18px 22px;
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--qtx-text);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            cursor: pointer;
            text-align: left;
            transition: var(--qtx-transition);
            line-height: 1.5;
        }

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

        .qtx-faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            flex-shrink: 0;
            transition: var(--qtx-transition);
        }

        .qtx-faq-item.active .qtx-faq-icon {
            transform: rotate(180deg);
            background: var(--qtx-blue);
            color: #fff;
        }

        .qtx-faq-answer {
            padding: 0 22px 18px;
            font-size: 0.92rem;
            color: var(--qtx-text-secondary);
            line-height: 1.8;
            display: none;
        }

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

        /* Pagination */
        .qtx-pagination-wrap {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }

        .qtx-page-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--qtx-radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--qtx-text-secondary);
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            transition: var(--qtx-transition);
            cursor: pointer;
        }

        .qtx-page-link:hover {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
            border-color: var(--qtx-blue);
        }

        .qtx-page-link.active {
            background: var(--qtx-blue);
            color: #fff;
            border-color: var(--qtx-blue);
            font-weight: 600;
        }

        .qtx-page-link.disabled {
            opacity: 0.45;
            pointer-events: none;
        }

        .qtx-page-dots {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            color: var(--qtx-text-muted);
            font-weight: 600;
        }

        /* Footer */
        .qtx-footer {
            background: #1A2B3C;
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 24px;
            margin-top: 0;
        }

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

        .qtx-footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .qtx-footer-desc {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.75;
            margin: 0;
            max-width: 300px;
        }

        .qtx-footer h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin: 0 0 16px;
        }

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

        .qtx-footer ul li {
            margin-bottom: 8px;
        }

        .qtx-footer ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--qtx-transition);
        }

        .qtx-footer ul li a:hover {
            color: #fff;
        }

        .qtx-footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.5);
        }

        .qtx-footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .qtx-article-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

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

        @media (max-width: 768px) {
            .qtx-nav-menu {
                display: none;
            }

            .qtx-nav-cta .qtx-btn {
                display: none;
            }

            .qtx-hamburger {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .qtx-mobile-menu.open {
                display: block;
            }

            .qtx-section {
                padding: 40px 0;
            }

            .qtx-page-header {
                padding: 88px 0 36px;
            }

            .qtx-page-title {
                font-size: 1.55rem;
            }

            .qtx-section-title {
                font-size: 1.25rem;
            }

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

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

            .qtx-subscribe-card {
                padding: 32px 24px;
                flex-direction: column;
                align-items: flex-start;
            }

            .qtx-subscribe-form {
                width: 100%;
                flex-direction: column;
                align-items: stretch;
            }

            .qtx-subscribe-input {
                width: 100%;
            }

            .qtx-footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

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

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

            .qtx-btn {
                padding: 8px 16px;
                font-size: 0.85rem;
            }

            .qtx-page-title {
                font-size: 1.35rem;
            }

            .qtx-article-card-body {
                padding: 16px 16px 20px;
            }

            .qtx-hot-item {
                padding: 12px 14px;
                gap: 12px;
            }

            .qtx-faq-question {
                padding: 14px 16px;
                font-size: 0.92rem;
            }

            .qtx-faq-answer {
                padding: 0 16px 14px;
                font-size: 0.88rem;
            }

            .qtx-page-link {
                width: 36px;
                height: 36px;
                font-size: 0.82rem;
            }
        }

/* roulang page: category4 */
:root {
            --qtx-blue: #5B8DEF;
            --qtx-blue-dark: #4A7BD8;
            --qtx-blue-light: #EAF1FD;
            --qtx-green: #3BA55D;
            --qtx-green-light: #E8F5ED;
            --qtx-orange: #F28C38;
            --qtx-orange-light: #FFF4E8;
            --qtx-bg: #F5F8FC;
            --qtx-white: #FFFFFF;
            --qtx-text: #1A2B3C;
            --qtx-text-secondary: #5A6B7C;
            --qtx-text-muted: #8A9AAB;
            --qtx-border: #E3EAF2;
            --qtx-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --qtx-shadow-md: 0 8px 20px rgba(0, 0, 0, 0.08);
            --qtx-shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
            --qtx-radius: 12px;
            --qtx-radius-sm: 8px;
            --qtx-radius-lg: 20px;
            --qtx-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --qtx-transition: all 0.3s ease;
            --qtx-max-width: 1140px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--qtx-font);
            color: var(--qtx-text);
            background: var(--qtx-bg);
            line-height: 1.7;
            font-size: 0.98rem;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: 68px;
        }
        a {
            text-decoration: none;
            color: var(--qtx-blue);
            transition: var(--qtx-transition);
        }
        a:hover {
            color: var(--qtx-blue-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--qtx-radius);
        }
        button,
        input,
        textarea,
        select {
            font-family: var(--qtx-font);
        }
        .qtx-container {
            max-width: var(--qtx-max-width);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .qtx-section {
            padding: 56px 0;
        }
        .qtx-section-alt {
            background: var(--qtx-white);
        }
        .qtx-section-tint {
            background: var(--qtx-bg);
        }
        .qtx-section-title-wrap {
            margin-bottom: 36px;
        }
        .qtx-section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 14px;
        }
        .qtx-section-title {
            font-size: 1.45rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--qtx-text);
            margin-bottom: 12px;
        }
        .qtx-section-desc {
            font-size: 0.98rem;
            color: var(--qtx-text-secondary);
            max-width: 720px;
            line-height: 1.8;
        }
        .qtx-section-desc.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .qtx-section-title-wrap.center {
            text-align: center;
        }
        .qtx-section-title-wrap.center .qtx-section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* Navigation */
        .qtx-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.3);
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.05);
            transition: var(--qtx-transition);
        }
        .qtx-header.scrolled {
            background: rgba(255, 255, 255, 0.97);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
            border-bottom-color: var(--qtx-border);
        }
        .qtx-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .qtx-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--qtx-text);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.01em;
        }
        .qtx-logo .qtx-logo-icon {
            width: 36px;
            height: 36px;
            background: var(--qtx-blue);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .qtx-nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .qtx-nav-menu li a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--qtx-text-secondary);
            border-radius: var(--qtx-radius-sm);
            transition: var(--qtx-transition);
            position: relative;
        }
        .qtx-nav-menu li a:hover {
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
        }
        .qtx-nav-menu li a.active {
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
            font-weight: 600;
        }
        .qtx-nav-cta {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .qtx-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            font-size: 0.92rem;
            font-weight: 600;
            border-radius: var(--qtx-radius-sm);
            border: none;
            cursor: pointer;
            transition: var(--qtx-transition);
            text-align: center;
            white-space: nowrap;
        }
        .qtx-btn:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(91, 141, 239, 0.25);
        }
        .qtx-btn-primary {
            background: var(--qtx-blue);
            color: #fff;
        }
        .qtx-btn-primary:hover {
            background: var(--qtx-blue-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--qtx-shadow-md);
        }
        .qtx-btn-outline {
            background: transparent;
            color: var(--qtx-blue);
            border: 1px solid var(--qtx-blue);
        }
        .qtx-btn-outline:hover {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue-dark);
            border-color: var(--qtx-blue-dark);
        }
        .qtx-btn-sm {
            padding: 8px 16px;
            font-size: 0.85rem;
        }
        .qtx-btn-lg {
            padding: 14px 32px;
            font-size: 1rem;
        }
        .qtx-hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.3rem;
            color: var(--qtx-text);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--qtx-radius-sm);
            transition: var(--qtx-transition);
        }
        .qtx-hamburger:hover {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
        }
        .qtx-mobile-menu {
            display: none;
            background: var(--qtx-white);
            border-bottom: 1px solid var(--qtx-border);
            padding: 16px 20px;
            box-shadow: var(--qtx-shadow-md);
        }
        .qtx-mobile-menu.open {
            display: block;
        }
        .qtx-mobile-menu ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .qtx-mobile-menu li a {
            display: block;
            padding: 12px 16px;
            color: var(--qtx-text-secondary);
            font-size: 0.95rem;
            font-weight: 500;
            border-radius: var(--qtx-radius-sm);
            transition: var(--qtx-transition);
        }
        .qtx-mobile-menu li a:hover,
        .qtx-mobile-menu li a.active {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
        }

        /* Breadcrumb */
        .qtx-breadcrumb-bar {
            background: var(--qtx-bg);
            border-bottom: 1px solid var(--qtx-border);
            padding: 18px 0;
        }
        .qtx-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--qtx-text-muted);
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
        }
        .qtx-breadcrumb li a {
            color: var(--qtx-text-secondary);
            font-weight: 500;
        }
        .qtx-breadcrumb li a:hover {
            color: var(--qtx-blue);
        }
        .qtx-breadcrumb .separator {
            color: var(--qtx-text-muted);
            font-size: 0.7rem;
        }
        .qtx-breadcrumb li.current {
            color: var(--qtx-blue);
            font-weight: 600;
        }

        /* Category Page Header */
        .qtx-category-header {
            background: linear-gradient(135deg, #F5F8FC 0%, #EAF1FD 100%);
            border-bottom: 1px solid var(--qtx-border);
            padding: 48px 0 40px;
        }
        .qtx-category-header h1 {
            font-size: 1.85rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .qtx-category-header .qtx-cat-desc {
            font-size: 1rem;
            color: var(--qtx-text-secondary);
            max-width: 760px;
            line-height: 1.8;
        }
        .qtx-category-stats {
            display: flex;
            gap: 32px;
            margin-top: 20px;
            flex-wrap: wrap;
        }
        .qtx-category-stats .stat-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--qtx-text-secondary);
        }
        .qtx-category-stats .stat-item i {
            color: var(--qtx-blue);
            font-size: 1rem;
        }

        /* Topic Cards */
        .qtx-topic-card {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius);
            box-shadow: var(--qtx-shadow-sm);
            overflow: hidden;
            transition: var(--qtx-transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .qtx-topic-card:hover {
            box-shadow: var(--qtx-shadow-md);
            transform: translateY(-2px);
            border-color: var(--qtx-blue-light);
        }
        .qtx-topic-card .topic-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: var(--qtx-radius) var(--qtx-radius) 0 0;
        }
        .qtx-topic-card .topic-body {
            padding: 20px 24px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .qtx-topic-card .topic-tag {
            display: inline-block;
            align-self: flex-start;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 50px;
            margin-bottom: 10px;
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
        }
        .qtx-topic-card .topic-tag.green {
            background: var(--qtx-green-light);
            color: var(--qtx-green);
        }
        .qtx-topic-card .topic-tag.orange {
            background: var(--qtx-orange-light);
            color: var(--qtx-orange);
        }
        .qtx-topic-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 8px;
            color: var(--qtx-text);
        }
        .qtx-topic-card .topic-excerpt {
            font-size: 0.88rem;
            color: var(--qtx-text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 14px;
        }
        .qtx-topic-card .topic-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--qtx-text-muted);
            border-top: 1px solid var(--qtx-border);
            padding-top: 12px;
        }
        .qtx-topic-card .topic-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .qtx-topic-card .topic-meta i {
            font-size: 0.82rem;
            color: var(--qtx-blue);
        }

        /* Hot Ranking */
        .qtx-ranking-list {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius);
            box-shadow: var(--qtx-shadow-sm);
            padding: 28px 24px;
        }
        .qtx-ranking-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 14px 0;
            border-bottom: 1px solid var(--qtx-border);
            transition: var(--qtx-transition);
        }
        .qtx-ranking-item:last-child {
            border-bottom: none;
        }
        .qtx-ranking-item:hover {
            padding-left: 8px;
        }
        .qtx-rank-num {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            flex-shrink: 0;
            background: var(--qtx-bg);
            color: var(--qtx-text-secondary);
        }
        .qtx-rank-num.top1 {
            background: var(--qtx-orange-light);
            color: var(--qtx-orange);
        }
        .qtx-rank-num.top2 {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
        }
        .qtx-rank-num.top3 {
            background: var(--qtx-green-light);
            color: var(--qtx-green);
        }
        .qtx-ranking-item .rank-content {
            flex: 1;
            min-width: 0;
        }
        .qtx-ranking-item .rank-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--qtx-text);
            display: block;
            margin-bottom: 2px;
            line-height: 1.4;
        }
        .qtx-ranking-item .rank-info {
            font-size: 0.8rem;
            color: var(--qtx-text-muted);
            display: flex;
            gap: 16px;
        }
        .qtx-ranking-item .rank-info span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* Fan Voices */
        .qtx-voice-card {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius);
            box-shadow: var(--qtx-shadow-sm);
            padding: 24px;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: var(--qtx-transition);
        }
        .qtx-voice-card:hover {
            box-shadow: var(--qtx-shadow-md);
            transform: translateY(-2px);
        }
        .qtx-voice-card .voice-quote {
            font-size: 0.92rem;
            color: var(--qtx-text-secondary);
            line-height: 1.85;
            flex: 1;
            margin-bottom: 16px;
            position: relative;
            padding-left: 16px;
            border-left: 3px solid var(--qtx-blue-light);
        }
        .qtx-voice-card .voice-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .qtx-voice-avatar {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .qtx-voice-avatar.green {
            background: var(--qtx-green-light);
            color: var(--qtx-green);
        }
        .qtx-voice-avatar.orange {
            background: var(--qtx-orange-light);
            color: var(--qtx-orange);
        }
        .qtx-voice-author .voice-name {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--qtx-text);
            display: block;
        }
        .qtx-voice-author .voice-meta {
            font-size: 0.78rem;
            color: var(--qtx-text-muted);
        }

        /* Tag Cloud */
        .qtx-tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .qtx-tag {
            display: inline-block;
            padding: 7px 18px;
            font-size: 0.85rem;
            font-weight: 500;
            border-radius: 50px;
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            color: var(--qtx-text-secondary);
            transition: var(--qtx-transition);
            cursor: pointer;
        }
        .qtx-tag:hover {
            background: var(--qtx-blue-light);
            border-color: var(--qtx-blue);
            color: var(--qtx-blue);
            transform: translateY(-1px);
        }
        .qtx-tag.hot {
            background: var(--qtx-orange-light);
            border-color: var(--qtx-orange);
            color: var(--qtx-orange);
            font-weight: 600;
        }

        /* Activity Cards */
        .qtx-activity-card {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius);
            box-shadow: var(--qtx-shadow-sm);
            overflow: hidden;
            transition: var(--qtx-transition);
            height: 100%;
        }
        .qtx-activity-card:hover {
            box-shadow: var(--qtx-shadow-md);
            transform: translateY(-2px);
        }
        .qtx-activity-card img {
            width: 100%;
            height: 150px;
            object-fit: cover;
            border-radius: var(--qtx-radius) var(--qtx-radius) 0 0;
        }
        .qtx-activity-card .activity-body {
            padding: 18px 22px 20px;
        }
        .qtx-activity-card h3 {
            font-size: 0.98rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--qtx-text);
            line-height: 1.45;
        }
        .qtx-activity-card p {
            font-size: 0.85rem;
            color: var(--qtx-text-secondary);
            margin-bottom: 12px;
            line-height: 1.65;
        }
        .qtx-activity-card .activity-link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--qtx-blue);
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .qtx-activity-card .activity-link i {
            font-size: 0.75rem;
            transition: var(--qtx-transition);
        }
        .qtx-activity-card .activity-link:hover i {
            transform: translateX(3px);
        }

        /* Subscribe CTA */
        .qtx-subscribe-box {
            background: linear-gradient(135deg, #5B8DEF 0%, #4A7BD8 100%);
            border-radius: var(--qtx-radius-lg);
            padding: 48px 40px;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .qtx-subscribe-box .subscribe-text h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: #fff;
        }
        .qtx-subscribe-box .subscribe-text p {
            font-size: 0.93rem;
            opacity: 0.9;
            margin: 0;
            max-width: 520px;
            line-height: 1.7;
        }
        .qtx-subscribe-form {
            display: flex;
            gap: 10px;
            flex-shrink: 0;
        }
        .qtx-subscribe-form input {
            padding: 12px 18px;
            border: 2px solid rgba(255, 255, 255, 0.3);
            border-radius: var(--qtx-radius-sm);
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            font-size: 0.9rem;
            width: 280px;
            transition: var(--qtx-transition);
        }
        .qtx-subscribe-form input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }
        .qtx-subscribe-form input:focus {
            outline: none;
            background: rgba(255, 255, 255, 0.25);
            border-color: rgba(255, 255, 255, 0.7);
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.15);
        }
        .qtx-subscribe-form .qtx-btn {
            background: var(--qtx-orange);
            color: #fff;
            border: none;
        }
        .qtx-subscribe-form .qtx-btn:hover {
            background: #e07b25;
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
        }

        /* FAQ */
        .qtx-accordion .accordion-item {
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius) !important;
            margin-bottom: 12px;
            background: var(--qtx-white);
            box-shadow: var(--qtx-shadow-sm);
            overflow: hidden;
        }
        .qtx-accordion .accordion-button {
            background: var(--qtx-white);
            color: var(--qtx-text);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 18px 22px;
            border: none;
            box-shadow: none;
            transition: var(--qtx-transition);
        }
        .qtx-accordion .accordion-button:not(.collapsed) {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
            box-shadow: none;
        }
        .qtx-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(91, 141, 239, 0.2);
            border-color: var(--qtx-blue);
        }
        .qtx-accordion .accordion-button::after {
            filter: brightness(0.4) sepia(1) hue-rotate(180deg) saturate(3);
        }
        .qtx-accordion .accordion-body {
            font-size: 0.92rem;
            color: var(--qtx-text-secondary);
            line-height: 1.85;
            padding: 16px 22px 20px;
            background: var(--qtx-white);
        }

        /* Pagination */
        .qtx-pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 32px;
        }
        .qtx-pagination .page-item {
            list-style: none;
        }
        .qtx-pagination .page-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 38px;
            height: 38px;
            padding: 0 12px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--qtx-text-secondary);
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius-sm);
            transition: var(--qtx-transition);
        }
        .qtx-pagination .page-link:hover {
            border-color: var(--qtx-blue);
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
        }
        .qtx-pagination .page-link.active {
            background: var(--qtx-blue);
            border-color: var(--qtx-blue);
            color: #fff;
            font-weight: 600;
        }
        .qtx-pagination .page-link.disabled {
            opacity: 0.5;
            pointer-events: none;
        }

        /* Footer */
        .qtx-footer {
            background: #1A2B3C;
            color: rgba(255, 255, 255, 0.85);
            padding: 56px 0 24px;
            font-size: 0.9rem;
        }
        .qtx-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }
        .qtx-footer h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .qtx-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .qtx-footer ul li {
            margin-bottom: 8px;
        }
        .qtx-footer ul li a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.88rem;
            transition: var(--qtx-transition);
        }
        .qtx-footer ul li a:hover {
            color: var(--qtx-blue);
            padding-left: 4px;
        }
        .qtx-footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .qtx-footer-desc {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.75;
            max-width: 320px;
        }
        .qtx-footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.55);
        }
        .qtx-footer-bottom a {
            color: rgba(255, 255, 255, 0.7);
        }
        .qtx-footer-bottom a:hover {
            color: var(--qtx-blue);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .qtx-footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .qtx-subscribe-box {
                flex-direction: column;
                align-items: flex-start;
                padding: 36px 28px;
            }
            .qtx-subscribe-form {
                width: 100%;
                flex-wrap: wrap;
            }
            .qtx-subscribe-form input {
                flex: 1;
                min-width: 200px;
            }
        }
        @media (max-width: 768px) {
            body {
                padding-top: 60px;
            }
            .qtx-nav {
                height: 60px;
            }
            .qtx-nav-menu {
                display: none;
            }
            .qtx-hamburger {
                display: block;
            }
            .qtx-nav-cta .qtx-btn {
                display: none;
            }
            .qtx-section {
                padding: 40px 0;
            }
            .qtx-category-header {
                padding: 32px 0 28px;
            }
            .qtx-category-header h1 {
                font-size: 1.5rem;
            }
            .qtx-section-title {
                font-size: 1.25rem;
            }
            .qtx-category-stats {
                gap: 16px;
                flex-wrap: wrap;
            }
            .qtx-topic-card .topic-img {
                height: 150px;
            }
            .qtx-footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .qtx-footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .qtx-subscribe-box {
                padding: 28px 20px;
            }
            .qtx-ranking-list {
                padding: 20px 16px;
            }
            .qtx-subscribe-form {
                flex-direction: column;
            }
            .qtx-subscribe-form input {
                width: 100%;
            }
        }
        @media (max-width: 520px) {
            .qtx-section {
                padding: 32px 0;
            }
            .qtx-category-header {
                padding: 24px 0 20px;
            }
            .qtx-category-header h1 {
                font-size: 1.3rem;
            }
            .qtx-section-title {
                font-size: 1.15rem;
            }
            .qtx-topic-card .topic-body {
                padding: 16px 18px 18px;
            }
            .qtx-topic-card h3 {
                font-size: 0.95rem;
            }
            .qtx-ranking-item {
                padding: 10px 0;
                gap: 10px;
            }
            .qtx-rank-num {
                width: 26px;
                height: 26px;
                font-size: 0.78rem;
            }
            .qtx-ranking-item .rank-title {
                font-size: 0.85rem;
            }
            .qtx-ranking-item .rank-info {
                font-size: 0.72rem;
                gap: 8px;
                flex-wrap: wrap;
            }
            .qtx-voice-card {
                padding: 18px;
            }
            .qtx-tag {
                padding: 5px 14px;
                font-size: 0.78rem;
            }
        }

/* roulang page: category5 */
:root {
            --qtx-blue: #5B8DEF;
            --qtx-blue-dark: #4A7BD8;
            --qtx-blue-light: #EAF1FD;
            --qtx-green: #3BA55D;
            --qtx-green-light: #E8F5ED;
            --qtx-orange: #F28C38;
            --qtx-orange-light: #FFF4E8;
            --qtx-bg: #F5F8FC;
            --qtx-white: #FFFFFF;
            --qtx-text: #1A2B3C;
            --qtx-text-secondary: #5A6B7C;
            --qtx-text-muted: #8A9AAB;
            --qtx-border: #E3EAF2;
            --qtx-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
            --qtx-shadow-md: 0 8px 20px rgba(0, 0, 0, 0.08);
            --qtx-shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
            --qtx-radius: 12px;
            --qtx-radius-sm: 8px;
            --qtx-radius-lg: 20px;
            --qtx-font: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --qtx-transition: all 0.3s ease;
            --qtx-max-width: 1140px;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--qtx-font);
            color: var(--qtx-text);
            background: var(--qtx-bg);
            line-height: 1.7;
            font-size: 0.98rem;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--qtx-radius);
        }

        button,
        input,
        textarea,
        select {
            font-family: var(--qtx-font);
        }

        .qtx-container {
            max-width: var(--qtx-max-width);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

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

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

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

        .qtx-section-title-wrap {
            margin-bottom: 40px;
        }

        .qtx-section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 14px;
        }

        .qtx-section-title {
            font-size: 1.5rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--qtx-text);
            margin-bottom: 12px;
        }

        .qtx-section-desc {
            font-size: 0.98rem;
            color: var(--qtx-text-secondary);
            max-width: 720px;
            line-height: 1.8;
        }

        .qtx-section-desc.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .qtx-section-title-wrap.center {
            text-align: center;
        }

        .qtx-section-title-wrap.center .qtx-section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* Navigation */
        .qtx-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.82);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.3);
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.05);
            transition: var(--qtx-transition);
        }

        .qtx-header.scrolled {
            background: rgba(255, 255, 255, 0.97);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
            border-bottom-color: var(--qtx-border);
        }

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

        .qtx-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--qtx-text);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.01em;
        }

        .qtx-logo .qtx-logo-icon {
            width: 36px;
            height: 36px;
            background: var(--qtx-blue);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

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

        .qtx-nav-menu li a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--qtx-text-secondary);
            border-radius: var(--qtx-radius-sm);
            transition: var(--qtx-transition);
            position: relative;
        }

        .qtx-nav-menu li a:hover {
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
        }

        .qtx-nav-menu li a.active {
            color: var(--qtx-blue);
            background: var(--qtx-blue-light);
            font-weight: 600;
        }

        .qtx-nav-cta {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .qtx-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            font-size: 0.92rem;
            font-weight: 600;
            border-radius: var(--qtx-radius-sm);
            border: none;
            cursor: pointer;
            transition: var(--qtx-transition);
            text-align: center;
            white-space: nowrap;
        }

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

        .qtx-btn-primary:hover {
            background: var(--qtx-blue-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(91, 141, 239, 0.3);
        }

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

        .qtx-btn-outline:hover {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue-dark);
            border-color: var(--qtx-blue-dark);
        }

        .qtx-btn-sm {
            padding: 7px 16px;
            font-size: 0.85rem;
        }

        .qtx-btn:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(91, 141, 239, 0.25);
        }

        .qtx-hamburger {
            display: none;
            width: 42px;
            height: 42px;
            background: var(--qtx-blue-light);
            border: none;
            border-radius: var(--qtx-radius-sm);
            color: var(--qtx-blue);
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--qtx-transition);
            align-items: center;
            justify-content: center;
        }

        .qtx-hamburger:hover {
            background: var(--qtx-blue);
            color: #fff;
        }

        .qtx-mobile-menu {
            display: none;
            background: #fff;
            border-top: 1px solid var(--qtx-border);
            padding: 12px 20px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
            transition: var(--qtx-transition);
        }

        .qtx-mobile-menu.open {
            display: block;
        }

        .qtx-mobile-menu ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .qtx-mobile-menu ul li a {
            display: block;
            padding: 12px 16px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--qtx-text-secondary);
            border-radius: var(--qtx-radius-sm);
            transition: var(--qtx-transition);
        }

        .qtx-mobile-menu ul li a:hover,
        .qtx-mobile-menu ul li a.active {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
            font-weight: 600;
        }

        /* Breadcrumb */
        .qtx-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--qtx-text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .qtx-breadcrumb a {
            color: var(--qtx-text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

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

        .qtx-breadcrumb .qtx-breadcrumb-sep {
            color: var(--qtx-text-muted);
            font-size: 0.7rem;
        }

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

        /* Category Header */
        .qtx-cat-header {
            padding: 120px 0 48px;
            background: var(--qtx-blue-light);
            position: relative;
            overflow: hidden;
        }

        .qtx-cat-header::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(91, 141, 239, 0.18) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .qtx-cat-header::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: 15%;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(59, 165, 93, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .qtx-cat-header .qtx-container {
            position: relative;
            z-index: 1;
        }

        .qtx-cat-header h1 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 14px;
            line-height: 1.35;
        }

        .qtx-cat-header .qtx-cat-desc {
            font-size: 0.98rem;
            color: var(--qtx-text-secondary);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 0;
        }

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

        .qtx-stat-card {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius);
            padding: 24px;
            box-shadow: var(--qtx-shadow-sm);
            transition: var(--qtx-transition);
            text-align: center;
        }

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

        .qtx-stat-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin: 0 auto 14px;
        }

        .qtx-stat-icon.blue {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
        }

        .qtx-stat-icon.green {
            background: var(--qtx-green-light);
            color: var(--qtx-green);
        }

        .qtx-stat-icon.orange {
            background: var(--qtx-orange-light);
            color: var(--qtx-orange);
        }

        .qtx-stat-number {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--qtx-text);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .qtx-stat-label {
            font-size: 0.85rem;
            color: var(--qtx-text-muted);
            font-weight: 500;
        }

        /* Data Cards List */
        .qtx-data-card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

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

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

        .qtx-data-card-img {
            width: 100%;
            height: 180px;
            overflow: hidden;
            border-radius: var(--qtx-radius) var(--qtx-radius) 0 0;
        }

        .qtx-data-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--qtx-radius) var(--qtx-radius) 0 0;
            transition: transform 0.4s ease;
        }

        .qtx-data-card:hover .qtx-data-card-img img {
            transform: scale(1.04);
        }

        .qtx-data-card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .qtx-data-card-date {
            font-size: 0.78rem;
            color: var(--qtx-text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .qtx-data-card-title {
            font-size: 1.02rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 8px;
            line-height: 1.4;
            transition: var(--qtx-transition);
        }

        .qtx-data-card:hover .qtx-data-card-title {
            color: var(--qtx-blue);
        }

        .qtx-data-card-desc {
            font-size: 0.88rem;
            color: var(--qtx-text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }

        .qtx-data-card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.78rem;
            color: var(--qtx-text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--qtx-border);
        }

        .qtx-data-card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* Hot Ranking List */
        .qtx-hot-ranking {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .qtx-ranking-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius);
            padding: 18px 20px;
            box-shadow: var(--qtx-shadow-sm);
            transition: var(--qtx-transition);
        }

        .qtx-ranking-item:hover {
            box-shadow: var(--qtx-shadow-md);
            transform: translateY(-2px);
        }

        .qtx-ranking-number {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
            font-weight: 700;
            font-size: 0.88rem;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .qtx-ranking-number.top1 {
            background: var(--qtx-orange-light);
            color: var(--qtx-orange);
        }

        .qtx-ranking-number.top2 {
            background: #F0F3F8;
            color: var(--qtx-text-secondary);
        }

        .qtx-ranking-number.top3 {
            background: #FBF0E8;
            color: #C77A3A;
        }

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

        .qtx-ranking-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--qtx-text);
            margin-bottom: 4px;
            line-height: 1.4;
        }

        .qtx-ranking-info {
            font-size: 0.82rem;
            color: var(--qtx-text-muted);
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* Tag Cloud */
        .qtx-tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .qtx-tag {
            display: inline-block;
            padding: 7px 18px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--qtx-text-secondary);
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: 50px;
            transition: var(--qtx-transition);
            cursor: default;
        }

        .qtx-tag:hover {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
            border-color: var(--qtx-blue);
        }

        .qtx-tag.highlight {
            background: var(--qtx-blue);
            color: #fff;
            border-color: var(--qtx-blue);
            font-weight: 600;
        }

        /* Topic Card */
        .qtx-topic-card {
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius-lg);
            overflow: hidden;
            box-shadow: var(--qtx-shadow-sm);
            display: flex;
            align-items: stretch;
            transition: var(--qtx-transition);
        }

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

        .qtx-topic-img {
            flex: 0 0 300px;
            background-size: cover;
            background-position: center;
            border-radius: var(--qtx-radius-lg) 0 0 var(--qtx-radius-lg);
            min-height: 200px;
        }

        .qtx-topic-body {
            padding: 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .qtx-topic-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--qtx-text);
            margin-bottom: 10px;
            line-height: 1.35;
        }

        .qtx-topic-desc {
            font-size: 0.92rem;
            color: var(--qtx-text-secondary);
            line-height: 1.75;
            margin-bottom: 16px;
        }

        /* Subscribe CTA */
        .qtx-subscribe-box {
            background: var(--qtx-blue);
            border-radius: var(--qtx-radius-lg);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }

        .qtx-subscribe-box::before {
            content: '';
            position: absolute;
            top: -40px;
            right: -30px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .qtx-subscribe-info {
            flex: 1;
            min-width: 260px;
        }

        .qtx-subscribe-info h3 {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }

        .qtx-subscribe-info p {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 0;
            line-height: 1.7;
        }

        .qtx-subscribe-form {
            display: flex;
            gap: 10px;
            flex: 0 0 380px;
            max-width: 100%;
        }

        .qtx-subscribe-form input {
            flex: 1;
            padding: 12px 18px;
            font-size: 0.92rem;
            border: none;
            border-radius: var(--qtx-radius-sm);
            background: #fff;
            color: var(--qtx-text);
            outline: none;
            transition: var(--qtx-transition);
        }

        .qtx-subscribe-form input:focus {
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.35);
        }

        .qtx-subscribe-form .qtx-btn {
            background: var(--qtx-orange);
            color: #fff;
            border-radius: var(--qtx-radius-sm);
            padding: 12px 24px;
            font-size: 0.92rem;
            border: none;
            cursor: pointer;
            transition: var(--qtx-transition);
            white-space: nowrap;
        }

        .qtx-subscribe-form .qtx-btn:hover {
            background: #E07B28;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(242, 140, 56, 0.35);
        }

        /* FAQ */
        .qtx-faq-list {
            max-width: 760px;
            margin: 0 auto;
        }

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

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

        .qtx-faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 22px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--qtx-text);
            cursor: pointer;
            user-select: none;
            transition: var(--qtx-transition);
            gap: 12px;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--qtx-font);
        }

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

        .qtx-faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 6px;
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            transition: transform 0.3s ease;
        }

        .qtx-faq-item.active .qtx-faq-icon {
            transform: rotate(180deg);
        }

        .qtx-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 22px;
            font-size: 0.9rem;
            color: var(--qtx-text-secondary);
            line-height: 1.75;
        }

        .qtx-faq-item.active .qtx-faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        /* Pagination */
        .qtx-pagination-wrap {
            display: flex;
            justify-content: center;
            margin-top: 40px;
        }

        .qtx-pagination {
            display: flex;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .qtx-pagination li a {
            display: flex;
            align-items: center;
            justify-content: center;
            min-width: 38px;
            height: 38px;
            padding: 0 12px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--qtx-text-secondary);
            background: var(--qtx-white);
            border: 1px solid var(--qtx-border);
            border-radius: var(--qtx-radius-sm);
            transition: var(--qtx-transition);
        }

        .qtx-pagination li a:hover {
            background: var(--qtx-blue-light);
            color: var(--qtx-blue);
            border-color: var(--qtx-blue);
        }

        .qtx-pagination li.active a {
            background: var(--qtx-blue);
            color: #fff;
            border-color: var(--qtx-blue);
            font-weight: 600;
        }

        /* Footer */
        .qtx-footer {
            background: #1A2B3C;
            color: rgba(255, 255, 255, 0.8);
            padding: 56px 0 32px;
        }

        .qtx-footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }

        .qtx-footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .qtx-footer-desc {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .qtx-footer h4 {
            font-size: 0.92rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
        }

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

        .qtx-footer ul li {
            margin-bottom: 8px;
        }

        .qtx-footer ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--qtx-transition);
        }

        .qtx-footer ul li a:hover {
            color: var(--qtx-blue);
            padding-left: 4px;
        }

        .qtx-footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.5);
        }

        .qtx-footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: var(--qtx-transition);
        }

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

        /* Responsive */
        @media (max-width: 1024px) {
            .qtx-stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .qtx-data-card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .qtx-hot-ranking {
                grid-template-columns: 1fr;
            }
            .qtx-footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .qtx-nav-menu {
                display: none;
            }
            .qtx-hamburger {
                display: flex;
            }
            .qtx-nav-cta .qtx-btn {
                display: none;
            }
            .qtx-section {
                padding: 48px 0;
            }
            .qtx-cat-header {
                padding: 100px 0 36px;
            }
            .qtx-cat-header h1 {
                font-size: 1.5rem;
            }
            .qtx-stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .qtx-data-card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .qtx-data-card-img {
                height: 200px;
            }
            .qtx-topic-card {
                flex-direction: column;
            }
            .qtx-topic-img {
                flex: 0 0 160px;
                border-radius: var(--qtx-radius-lg) var(--qtx-radius-lg) 0 0;
                min-height: 160px;
            }
            .qtx-topic-body {
                padding: 20px 22px;
            }
            .qtx-subscribe-box {
                padding: 32px 24px;
                flex-direction: column;
                text-align: center;
            }
            .qtx-subscribe-form {
                flex: 1 1 100%;
                width: 100%;
                flex-direction: column;
                gap: 10px;
            }
            .qtx-subscribe-form input {
                width: 100%;
            }
            .qtx-subscribe-form .qtx-btn {
                width: 100%;
                justify-content: center;
            }
            .qtx-footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .qtx-footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .qtx-ranking-item {
                padding: 14px 16px;
                gap: 12px;
            }
            .qtx-section-title {
                font-size: 1.3rem;
            }
        }

        @media (max-width: 520px) {
            .qtx-stats-grid {
                grid-template-columns: 1fr;
            }
            .qtx-stat-card {
                padding: 18px;
            }
            .qtx-stat-number {
                font-size: 1.5rem;
            }
            .qtx-cat-header {
                padding: 90px 0 28px;
            }
            .qtx-cat-header h1 {
                font-size: 1.3rem;
            }
            .qtx-section {
                padding: 36px 0;
            }
            .qtx-section-title {
                font-size: 1.2rem;
            }
            .qtx-data-card-img {
                height: 160px;
            }
            .qtx-topic-img {
                flex-basis: 130px;
                min-height: 130px;
            }
            .qtx-pagination li a {
                min-width: 32px;
                height: 32px;
                padding: 0 8px;
                font-size: 0.8rem;
            }
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}