/* roulang page: index */
:root {
            --qt-primary: #00d68f;
            --qt-primary-dark: #00b377;
            --qt-primary-light: #33e6a8;
            --qt-secondary: #ff8c42;
            --qt-accent: #4dabf7;
            --qt-bg-dark: #0a0f1a;
            --qt-bg-card: #111827;
            --qt-bg-card-hover: #1a2332;
            --qt-bg-elevated: #162032;
            --qt-text-primary: #f1f5f9;
            --qt-text-secondary: #94a3b8;
            --qt-text-muted: #64748b;
            --qt-border: #1e293b;
            --qt-border-light: #2d3b4f;
            --qt-radius-sm: 8px;
            --qt-radius-md: 14px;
            --qt-radius-lg: 20px;
            --qt-radius-xl: 28px;
            --qt-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --qt-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
            --qt-shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.5);
            --qt-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --qt-font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --qt-section-spacing: 72px;
            --qt-nav-height: 68px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--qt-font-sans);
            background-color: var(--qt-bg-dark);
            color: var(--qt-text-primary);
            line-height: 1.7;
            overflow-x: hidden;
            font-size: 16px;
        }

        a {
            color: var(--qt-primary);
            text-decoration: none;
            transition: var(--qt-transition);
        }
        a:hover {
            color: var(--qt-primary-light);
            text-decoration: none;
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--qt-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        .qt-container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .qt-container {
                padding: 0 16px;
            }
        }

        /* ========== NAVBAR ========== */
        .qt-navbar {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(10, 15, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--qt-border);
            height: var(--qt-nav-height);
            display: flex;
            align-items: center;
            transition: var(--qt-transition);
        }
        .qt-navbar.scrolled {
            background: rgba(10, 15, 26, 0.98);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }
        .qt-navbar .qt-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .qt-nav-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--qt-text-primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .qt-nav-logo .qt-logo-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0a0f1a;
            font-size: 16px;
            font-weight: 900;
            flex-shrink: 0;
        }
        .qt-nav-logo:hover {
            color: var(--qt-text-primary);
        }
        .qt-nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
        }
        .qt-nav-links::-webkit-scrollbar {
            display: none;
        }
        .qt-nav-links li a {
            display: inline-block;
            padding: 8px 14px;
            color: var(--qt-text-secondary);
            font-size: 0.875rem;
            font-weight: 500;
            border-radius: 8px;
            white-space: nowrap;
            transition: var(--qt-transition);
            position: relative;
        }
        .qt-nav-links li a:hover {
            color: var(--qt-text-primary);
            background: var(--qt-bg-elevated);
        }
        .qt-nav-links li a.qt-active {
            color: var(--qt-primary);
            background: rgba(0, 214, 143, 0.12);
        }
        .qt-nav-links li a.qt-active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--qt-primary);
            border-radius: 2px;
        }
        .qt-nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .qt-nav-status {
            display: flex;
            align-items: center;
            gap: 6px;
            color: var(--qt-text-secondary);
            font-size: 0.75rem;
            padding: 6px 12px;
            background: var(--qt-bg-elevated);
            border-radius: 20px;
            border: 1px solid var(--qt-border);
        }
        .qt-status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--qt-primary);
            animation: qtPulse 2s infinite;
        }
        @keyframes qtPulse {
            0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 214, 143, 0.5); }
            50% { opacity: 0.7; box-shadow: 0 0 0 6px rgba(0, 214, 143, 0); }
        }
        .qt-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            background: var(--qt-primary);
            color: #0a0f1a;
            font-size: 0.85rem;
            font-weight: 700;
            border-radius: 10px;
            border: none;
            transition: var(--qt-transition);
            white-space: nowrap;
        }
        .qt-nav-cta:hover {
            background: var(--qt-primary-light);
            color: #0a0f1a;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(0, 214, 143, 0.3);
        }
        .qt-nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--qt-text-primary);
            font-size: 1.4rem;
            padding: 8px;
            cursor: pointer;
        }
        @media (max-width: 992px) {
            .qt-nav-links {
                position: fixed;
                top: var(--qt-nav-height);
                left: 0;
                right: 0;
                background: rgba(10, 15, 26, 0.98);
                flex-direction: column;
                padding: 16px 24px;
                gap: 8px;
                border-bottom: 1px solid var(--qt-border);
                display: none;
                max-height: calc(100vh - var(--qt-nav-height));
                overflow-y: auto;
                align-items: stretch;
            }
            .qt-nav-links.qt-mobile-open {
                display: flex;
            }
            .qt-nav-links li a {
                display: block;
                padding: 10px 16px;
                font-size: 0.95rem;
            }
            .qt-nav-toggle {
                display: block;
            }
            .qt-nav-status {
                display: none;
            }
        }
        @media (max-width: 576px) {
            .qt-nav-cta {
                padding: 8px 14px;
                font-size: 0.75rem;
            }
            .qt-nav-logo {
                font-size: 1.1rem;
            }
        }

        /* ========== SECTION BASE ========== */
        .qt-section {
            padding: var(--qt-section-spacing) 0;
            position: relative;
        }
        .qt-section-dark {
            background: var(--qt-bg-card);
            border-top: 1px solid var(--qt-border);
            border-bottom: 1px solid var(--qt-border);
        }
        .qt-section-alt {
            background: linear-gradient(180deg, var(--qt-bg-dark) 0%, var(--qt-bg-card) 100%);
        }
        .qt-section-title {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            color: var(--qt-text-primary);
        }
        .qt-section-subtitle {
            font-size: 1.05rem;
            color: var(--qt-text-secondary);
            margin-bottom: 32px;
            max-width: 680px;
            line-height: 1.8;
        }
        .qt-tag {
            display: inline-block;
            padding: 4px 12px;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--qt-primary);
            background: rgba(0, 214, 143, 0.1);
            border-radius: 20px;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }
        .qt-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 0.95rem;
            font-weight: 700;
            border-radius: 12px;
            border: none;
            cursor: pointer;
            transition: var(--qt-transition);
            text-align: center;
            justify-content: center;
        }
        .qt-btn-primary {
            background: var(--qt-primary);
            color: #0a0f1a;
        }
        .qt-btn-primary:hover {
            background: var(--qt-primary-light);
            color: #0a0f1a;
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(0, 214, 143, 0.35);
        }
        .qt-btn-outline {
            background: transparent;
            color: var(--qt-text-primary);
            border: 2px solid var(--qt-border-light);
        }
        .qt-btn-outline:hover {
            border-color: var(--qt-primary);
            color: var(--qt-primary);
            background: rgba(0, 214, 143, 0.05);
            transform: translateY(-2px);
        }
        .qt-btn-secondary {
            background: var(--qt-secondary);
            color: #1a1a1a;
        }
        .qt-btn-secondary:hover {
            background: #ffa366;
            color: #1a1a1a;
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(255, 140, 66, 0.3);
        }
        .qt-btn-lg {
            padding: 16px 40px;
            font-size: 1.05rem;
            border-radius: 14px;
        }
        .qt-btn-sm {
            padding: 8px 18px;
            font-size: 0.8rem;
            border-radius: 8px;
        }

        /* ========== HERO BENTO ========== */
        .qt-hero {
            padding: 48px 0 64px;
            background: linear-gradient(180deg, var(--qt-bg-dark) 0%, #0d1524 50%, var(--qt-bg-dark) 100%);
            position: relative;
            overflow: hidden;
            min-height: calc(100vh - var(--qt-nav-height));
            display: flex;
            align-items: center;
        }
        .qt-hero::before {
            content: '';
            position: absolute;
            top: -200px;
            right: -200px;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 214, 143, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .qt-hero::after {
            content: '';
            position: absolute;
            bottom: -300px;
            left: -200px;
            width: 700px;
            height: 700px;
            background: radial-gradient(circle, rgba(77, 171, 247, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }
        .qt-hero-bento {
            display: grid;
            grid-template-columns: 2fr 1fr;
            grid-template-rows: auto auto;
            gap: 20px;
            position: relative;
            z-index: 1;
        }
        .qt-hero-main {
            grid-row: span 2;
            background: linear-gradient(135deg, var(--qt-bg-card) 0%, var(--qt-bg-elevated) 100%);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-xl);
            padding: 48px 44px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }
        .qt-hero-main::after {
            content: '';
            position: absolute;
            top: -100px;
            right: -100px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(0, 214, 143, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }
        .qt-hero-main h1 {
            font-size: clamp(2rem, 4vw, 3.2rem);
            font-weight: 900;
            letter-spacing: -1px;
            line-height: 1.2;
            margin-bottom: 18px;
            color: var(--qt-text-primary);
        }
        .qt-hero-main h1 .qt-highlight {
            color: var(--qt-primary);
        }
        .qt-hero-desc {
            font-size: 1.1rem;
            color: var(--qt-text-secondary);
            line-height: 1.85;
            margin-bottom: 28px;
            max-width: 560px;
        }
        .qt-hero-ctas {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }
        .qt-hero-stats {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
            padding-top: 20px;
            border-top: 1px solid var(--qt-border);
        }
        .qt-hero-stat {
            text-align: left;
        }
        .qt-hero-stat .qt-stat-num {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--qt-primary);
            letter-spacing: -0.5px;
        }
        .qt-hero-stat .qt-stat-label {
            font-size: 0.8rem;
            color: var(--qt-text-muted);
            margin-top: 2px;
        }
        .qt-hero-small {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-lg);
            padding: 24px 28px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            transition: var(--qt-transition);
            position: relative;
            overflow: hidden;
        }
        .qt-hero-small:hover {
            border-color: var(--qt-primary);
            background: var(--qt-bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--qt-shadow-md);
        }
        .qt-hero-small .qt-small-icon {
            font-size: 1.8rem;
            color: var(--qt-primary);
            margin-bottom: 10px;
        }
        .qt-hero-small h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--qt-text-primary);
        }
        .qt-hero-small p {
            font-size: 0.85rem;
            color: var(--qt-text-muted);
            margin: 0;
            line-height: 1.6;
        }
        .qt-hero-cta-bar {
            grid-column: 1 / -1;
            background: linear-gradient(135deg, var(--qt-primary) 0%, var(--qt-primary-dark) 100%);
            border-radius: var(--qt-radius-md);
            padding: 18px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .qt-hero-cta-bar p {
            margin: 0;
            color: #0a0f1a;
            font-weight: 600;
            font-size: 0.95rem;
        }
        .qt-hero-cta-bar .qt-btn {
            background: #0a0f1a;
            color: var(--qt-primary);
        }
        .qt-hero-cta-bar .qt-btn:hover {
            background: #1a2332;
            color: var(--qt-primary-light);
        }
        @media (max-width: 992px) {
            .qt-hero-bento {
                grid-template-columns: 1fr;
                grid-template-rows: auto;
            }
            .qt-hero-main {
                grid-row: span 1;
                padding: 32px 24px;
            }
            .qt-hero-cta-bar {
                grid-column: 1;
                flex-direction: column;
                text-align: center;
            }
        }

        /* ========== LIVE TICKER ========== */
        .qt-ticker {
            background: var(--qt-bg-card);
            border-bottom: 1px solid var(--qt-border);
            padding: 12px 0;
            overflow: hidden;
            position: relative;
        }
        .qt-ticker-inner {
            display: flex;
            gap: 20px;
            animation: qtTickerScroll 30s linear infinite;
            white-space: nowrap;
        }
        .qt-ticker:hover .qt-ticker-inner {
            animation-play-state: paused;
        }
        @keyframes qtTickerScroll {
            0% { transform: translateX(0); }
            100% { transform: translateX(-50%); }
        }
        .qt-ticker-item {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 8px 18px;
            background: var(--qt-bg-elevated);
            border-radius: 8px;
            font-size: 0.8rem;
            color: var(--qt-text-secondary);
            border: 1px solid var(--qt-border);
            flex-shrink: 0;
        }
        .qt-ticker-item .qt-live-badge {
            background: #ef4444;
            color: #fff;
            font-size: 0.65rem;
            font-weight: 700;
            padding: 2px 8px;
            border-radius: 4px;
            letter-spacing: 0.5px;
        }
        .qt-ticker-item .qt-score {
            font-weight: 800;
            color: var(--qt-text-primary);
            font-size: 0.9rem;
        }

        /* ========== CARDS ========== */
        .qt-card {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 28px;
            transition: var(--qt-transition);
            height: 100%;
        }
        .qt-card:hover {
            border-color: var(--qt-primary);
            background: var(--qt-bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--qt-shadow-md);
        }
        .qt-card .qt-card-icon {
            font-size: 2rem;
            color: var(--qt-primary);
            margin-bottom: 14px;
        }
        .qt-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--qt-text-primary);
        }
        .qt-card p {
            font-size: 0.88rem;
            color: var(--qt-text-secondary);
            margin: 0;
            line-height: 1.7;
        }
        .qt-card-flat {
            background: var(--qt-bg-elevated);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 24px;
            transition: var(--qt-transition);
            height: 100%;
        }
        .qt-card-flat:hover {
            border-color: var(--qt-border-light);
            background: var(--qt-bg-card-hover);
            transform: translateY(-3px);
        }

        /* ========== GUARANTEE ICON BAR ========== */
        .qt-guarantee-bar {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .qt-guarantee-item {
            text-align: center;
            padding: 28px 20px;
            background: var(--qt-bg-card);
            border-radius: var(--qt-radius-md);
            border: 1px solid var(--qt-border);
            transition: var(--qt-transition);
        }
        .qt-guarantee-item:hover {
            border-color: var(--qt-primary);
            transform: translateY(-3px);
            box-shadow: var(--qt-shadow-sm);
        }
        .qt-guarantee-item i {
            font-size: 2.2rem;
            color: var(--qt-primary);
            margin-bottom: 12px;
            display: block;
        }
        .qt-guarantee-item h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--qt-text-primary);
        }
        .qt-guarantee-item p {
            font-size: 0.8rem;
            color: var(--qt-text-muted);
            margin: 0;
            line-height: 1.5;
        }
        @media (max-width: 768px) {
            .qt-guarantee-bar {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
        }
        @media (max-width: 480px) {
            .qt-guarantee-bar {
                grid-template-columns: 1fr;
            }
        }

        /* ========== FEATURE GRID ========== */
        .qt-feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        @media (max-width: 992px) {
            .qt-feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .qt-feature-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== MATCH TIME CARDS ========== */
        .qt-match-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .qt-match-card {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 20px;
            transition: var(--qt-transition);
            text-align: center;
        }
        .qt-match-card:hover {
            border-color: var(--qt-primary);
            transform: translateY(-4px);
            box-shadow: var(--qt-shadow-md);
        }
        .qt-match-card .qt-match-time {
            font-size: 0.75rem;
            color: var(--qt-primary);
            font-weight: 600;
            margin-bottom: 8px;
        }
        .qt-match-card .qt-match-teams {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 6px;
        }
        .qt-match-card .qt-match-league {
            font-size: 0.7rem;
            color: var(--qt-text-muted);
        }
        @media (max-width: 992px) {
            .qt-match-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .qt-match-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== BRAND STORY ========== */
        .qt-story {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .qt-story-image {
            border-radius: var(--qt-radius-lg);
            overflow: hidden;
            border: 1px solid var(--qt-border);
            position: relative;
        }
        .qt-story-image img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            transition: var(--qt-transition);
        }
        .qt-story-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(10, 15, 26, 0.8) 100%);
            pointer-events: none;
        }
        .qt-story-image:hover img {
            transform: scale(1.05);
        }
        .qt-story-text h3 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--qt-text-primary);
        }
        .qt-story-text p {
            color: var(--qt-text-secondary);
            line-height: 1.85;
            margin-bottom: 14px;
            font-size: 0.95rem;
        }
        @media (max-width: 768px) {
            .qt-story {
                grid-template-columns: 1fr;
            }
            .qt-story-image img {
                height: 250px;
            }
        }

        /* ========== STATS ========== */
        .qt-stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .qt-stat-card {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 28px 20px;
            text-align: center;
            transition: var(--qt-transition);
        }
        .qt-stat-card:hover {
            border-color: var(--qt-primary);
            transform: translateY(-3px);
        }
        .qt-stat-card .qt-stat-num {
            font-size: 2rem;
            font-weight: 900;
            color: var(--qt-primary);
            letter-spacing: -1px;
            line-height: 1.2;
        }
        .qt-stat-card .qt-stat-label {
            font-size: 0.8rem;
            color: var(--qt-text-muted);
            margin-top: 6px;
        }
        @media (max-width: 768px) {
            .qt-stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .qt-stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
        }

        /* ========== TOPIC TAGS ========== */
        .qt-topics {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .qt-topic-tag {
            display: inline-block;
            padding: 10px 20px;
            background: var(--qt-bg-elevated);
            border: 1px solid var(--qt-border);
            border-radius: 30px;
            font-size: 0.85rem;
            color: var(--qt-text-secondary);
            transition: var(--qt-transition);
            cursor: pointer;
        }
        .qt-topic-tag:hover {
            border-color: var(--qt-primary);
            color: var(--qt-primary);
            background: rgba(0, 214, 143, 0.08);
            transform: translateY(-2px);
        }

        /* ========== NEWS LIST ========== */
        .qt-news-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 24px;
        }
        .qt-news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .qt-news-item {
            display: flex;
            gap: 16px;
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 18px 20px;
            transition: var(--qt-transition);
            align-items: center;
        }
        .qt-news-item:hover {
            border-color: var(--qt-primary);
            background: var(--qt-bg-card-hover);
            transform: translateX(4px);
            box-shadow: var(--qt-shadow-sm);
        }
        .qt-news-date {
            flex-shrink: 0;
            text-align: center;
            min-width: 56px;
            background: var(--qt-bg-elevated);
            border-radius: 8px;
            padding: 8px 6px;
            border: 1px solid var(--qt-border);
        }
        .qt-news-date .qt-date-day {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--qt-primary);
            line-height: 1.1;
        }
        .qt-news-date .qt-date-month {
            font-size: 0.7rem;
            color: var(--qt-text-muted);
        }
        .qt-news-content h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--qt-text-primary);
            line-height: 1.5;
        }
        .qt-news-content p {
            font-size: 0.82rem;
            color: var(--qt-text-muted);
            margin: 0;
            line-height: 1.5;
        }
        .qt-news-sidebar {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 24px;
            height: fit-content;
        }
        .qt-news-sidebar h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--qt-text-primary);
        }
        .qt-news-sidebar ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .qt-news-sidebar ul li {
            padding: 10px 0;
            border-bottom: 1px solid var(--qt-border);
            font-size: 0.85rem;
            color: var(--qt-text-secondary);
            transition: var(--qt-transition);
            cursor: pointer;
        }
        .qt-news-sidebar ul li:last-child {
            border-bottom: none;
        }
        .qt-news-sidebar ul li:hover {
            color: var(--qt-primary);
            padding-left: 6px;
        }
        @media (max-width: 768px) {
            .qt-news-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== COMPARISON TABLE ========== */
        .qt-compare-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            align-items: stretch;
        }
        .qt-compare-card {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-lg);
            padding: 32px 28px;
            display: flex;
            flex-direction: column;
            transition: var(--qt-transition);
            position: relative;
        }
        .qt-compare-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--qt-shadow-lg);
        }
        .qt-compare-card.qt-featured {
            border-color: var(--qt-primary);
            background: linear-gradient(180deg, rgba(0, 214, 143, 0.08) 0%, var(--qt-bg-card) 40%);
            box-shadow: 0 0 40px rgba(0, 214, 143, 0.15);
        }
        .qt-compare-card.qt-featured::before {
            content: '推荐';
            position: absolute;
            top: 16px;
            right: 16px;
            background: var(--qt-primary);
            color: #0a0f1a;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: 0.5px;
        }
        .qt-compare-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 8px;
        }
        .qt-compare-card .qt-price {
            font-size: 2rem;
            font-weight: 900;
            color: var(--qt-primary);
            margin-bottom: 16px;
        }
        .qt-compare-card .qt-price span {
            font-size: 0.85rem;
            color: var(--qt-text-muted);
            font-weight: 400;
        }
        .qt-compare-card ul {
            list-style: none;
            margin: 0 0 20px;
            padding: 0;
            flex-grow: 1;
        }
        .qt-compare-card ul li {
            padding: 8px 0;
            font-size: 0.85rem;
            color: var(--qt-text-secondary);
            border-bottom: 1px solid var(--qt-border);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .qt-compare-card ul li:last-child {
            border-bottom: none;
        }
        .qt-compare-card ul li i.fa-check {
            color: var(--qt-primary);
        }
        .qt-compare-card ul li i.fa-minus {
            color: var(--qt-text-muted);
        }
        @media (max-width: 768px) {
            .qt-compare-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== TESTIMONIALS ========== */
        .qt-testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .qt-testimonial-card {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 24px;
            transition: var(--qt-transition);
        }
        .qt-testimonial-card:hover {
            border-color: var(--qt-border-light);
            transform: translateY(-3px);
        }
        .qt-testimonial-card .qt-stars {
            color: #ffc107;
            margin-bottom: 10px;
            font-size: 0.85rem;
        }
        .qt-testimonial-card p {
            font-size: 0.88rem;
            color: var(--qt-text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            font-style: italic;
        }
        .qt-testimonial-card .qt-user {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .qt-testimonial-card .qt-user-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--qt-bg-elevated);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--qt-primary);
            font-weight: 700;
            font-size: 0.8rem;
            flex-shrink: 0;
            border: 1px solid var(--qt-border);
        }
        .qt-testimonial-card .qt-user-name {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--qt-text-primary);
        }
        .qt-testimonial-card .qt-user-role {
            font-size: 0.7rem;
            color: var(--qt-text-muted);
        }
        @media (max-width: 768px) {
            .qt-testimonial-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== FAQ ========== */
        .qt-faq-accordion .accordion-item {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
        }
        .qt-faq-accordion .accordion-button {
            background: var(--qt-bg-card);
            color: var(--qt-text-primary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 18px 20px;
            border: none;
            box-shadow: none;
        }
        .qt-faq-accordion .accordion-button:not(.collapsed) {
            background: var(--qt-bg-elevated);
            color: var(--qt-primary);
            box-shadow: none;
        }
        .qt-faq-accordion .accordion-button::after {
            filter: invert(0.7);
        }
        .qt-faq-accordion .accordion-button:focus {
            box-shadow: none;
            border-color: var(--qt-primary);
        }
        .qt-faq-accordion .accordion-body {
            background: var(--qt-bg-card);
            color: var(--qt-text-secondary);
            font-size: 0.88rem;
            line-height: 1.75;
            padding: 0 20px 18px;
        }

        /* ========== SUBSCRIBE FORM ========== */
        .qt-form-card {
            background: linear-gradient(135deg, var(--qt-bg-card) 0%, var(--qt-bg-elevated) 100%);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-lg);
            padding: 40px 36px;
        }
        .qt-form-card .form-control {
            background: var(--qt-bg-dark);
            border: 1px solid var(--qt-border);
            border-radius: 10px;
            color: var(--qt-text-primary);
            padding: 12px 16px;
            font-size: 0.9rem;
            transition: var(--qt-transition);
        }
        .qt-form-card .form-control:focus {
            border-color: var(--qt-primary);
            box-shadow: 0 0 0 4px rgba(0, 214, 143, 0.1);
            background: var(--qt-bg-dark);
            color: var(--qt-text-primary);
        }
        .qt-form-card .form-control::placeholder {
            color: var(--qt-text-muted);
        }
        .qt-form-card label {
            color: var(--qt-text-secondary);
            font-weight: 500;
            font-size: 0.85rem;
            margin-bottom: 6px;
        }
        .qt-form-card .form-select {
            background-color: var(--qt-bg-dark);
            border: 1px solid var(--qt-border);
            border-radius: 10px;
            color: var(--qt-text-primary);
            padding: 12px 16px;
            font-size: 0.9rem;
        }

        /* ========== CTA ========== */
        .qt-cta-section {
            background: linear-gradient(135deg, var(--qt-bg-card) 0%, #0d1f1a 100%);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-xl);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .qt-cta-section::before {
            content: '';
            position: absolute;
            top: -150px;
            right: -150px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 214, 143, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .qt-cta-section h2 {
            font-size: clamp(1.5rem, 2.5vw, 2.2rem);
            font-weight: 800;
            color: var(--qt-text-primary);
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }
        .qt-cta-section p {
            color: var(--qt-text-secondary);
            font-size: 1rem;
            max-width: 560px;
            margin: 0 auto 24px;
            line-height: 1.7;
            position: relative;
            z-index: 1;
        }
        .qt-cta-section .qt-btn {
            position: relative;
            z-index: 1;
        }

        /* ========== FOOTER ========== */
        .qt-footer {
            background: #070a12;
            border-top: 1px solid var(--qt-border);
            padding: 48px 0 24px;
        }
        .qt-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .qt-footer-brand {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--qt-text-primary);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .qt-footer-brand .qt-logo-icon {
            width: 28px;
            height: 28px;
            background: var(--qt-primary);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0a0f1a;
            font-size: 13px;
            font-weight: 900;
        }
        .qt-footer p {
            color: var(--qt-text-muted);
            font-size: 0.85rem;
            line-height: 1.7;
            margin-bottom: 8px;
        }
        .qt-footer h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 14px;
        }
        .qt-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .qt-footer ul li {
            margin-bottom: 8px;
        }
        .qt-footer ul li a {
            color: var(--qt-text-muted);
            font-size: 0.85rem;
            transition: var(--qt-transition);
        }
        .qt-footer ul li a:hover {
            color: var(--qt-primary);
        }
        .qt-footer-bottom {
            border-top: 1px solid var(--qt-border);
            padding-top: 20px;
            text-align: center;
            color: var(--qt-text-muted);
            font-size: 0.78rem;
            line-height: 1.6;
        }
        .qt-footer-bottom a {
            color: var(--qt-text-muted);
        }
        .qt-footer-bottom a:hover {
            color: var(--qt-primary);
        }
        @media (max-width: 768px) {
            .qt-footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 480px) {
            .qt-footer-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== UTILITY ========== */
        .qt-img-cover {
            border-radius: var(--qt-radius-md);
            overflow: hidden;
            border: 1px solid var(--qt-border);
        }
        .qt-img-cover img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: var(--qt-transition);
        }
        .qt-img-cover:hover img {
            transform: scale(1.04);
        }
        .qt-divider {
            border-top: 1px solid var(--qt-border);
            margin: 0;
        }
        .qt-list-check {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .qt-list-check li {
            padding: 8px 0;
            color: var(--qt-text-secondary);
            font-size: 0.88rem;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }
        .qt-list-check li i {
            color: var(--qt-primary);
            margin-top: 4px;
            flex-shrink: 0;
        }
        .qt-text-center {
            text-align: center;
        }
        .qt-gap-2 {
            gap: 16px;
        }
        .qt-mb-0 {
            margin-bottom: 0 !important;
        }
        .qt-mb-2 {
            margin-bottom: 16px !important;
        }
        .qt-mb-3 {
            margin-bottom: 24px !important;
        }
        .qt-mb-4 {
            margin-bottom: 32px !important;
        }

/* roulang page: category1 */
:root {
            --qt-primary: #00d68f;
            --qt-primary-dark: #00b377;
            --qt-primary-light: #33e6a8;
            --qt-secondary: #ff8c42;
            --qt-accent: #4dabf7;
            --qt-bg-dark: #0a0f1a;
            --qt-bg-card: #111827;
            --qt-bg-card-hover: #1a2332;
            --qt-bg-elevated: #162032;
            --qt-text-primary: #f1f5f9;
            --qt-text-secondary: #94a3b8;
            --qt-text-muted: #64748b;
            --qt-border: #1e293b;
            --qt-border-light: #2d3b4f;
            --qt-radius-sm: 8px;
            --qt-radius-md: 14px;
            --qt-radius-lg: 20px;
            --qt-radius-xl: 28px;
            --qt-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --qt-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
            --qt-shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.5);
            --qt-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --qt-font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --qt-section-spacing: 72px;
            --qt-nav-height: 68px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--qt-font-sans);
            background-color: var(--qt-bg-dark);
            color: var(--qt-text-primary);
            line-height: 1.7;
            overflow-x: hidden;
            font-size: 16px;
        }

        a {
            color: var(--qt-primary);
            text-decoration: none;
            transition: var(--qt-transition);
        }
        a:hover {
            color: var(--qt-primary-light);
            text-decoration: none;
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--qt-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

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

        /* ========== NAVBAR ========== */
        .qt-navbar {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(10, 15, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--qt-border);
            height: var(--qt-nav-height);
            display: flex;
            align-items: center;
            transition: var(--qt-transition);
        }
        .qt-navbar.scrolled {
            background: rgba(10, 15, 26, 0.98);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }
        .qt-navbar .qt-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .qt-nav-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--qt-text-primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .qt-nav-logo .qt-logo-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0a0f1a;
            font-size: 16px;
            font-weight: 900;
            flex-shrink: 0;
        }
        .qt-nav-logo:hover {
            color: var(--qt-text-primary);
        }
        .qt-nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
        }
        .qt-nav-links::-webkit-scrollbar {
            display: none;
        }
        .qt-nav-links li a {
            display: inline-block;
            padding: 8px 14px;
            color: var(--qt-text-secondary);
            font-size: 0.875rem;
            font-weight: 500;
            border-radius: 8px;
            white-space: nowrap;
            transition: var(--qt-transition);
            position: relative;
        }
        .qt-nav-links li a:hover {
            color: var(--qt-text-primary);
            background: var(--qt-bg-elevated);
        }
        .qt-nav-links li a.qt-active {
            color: var(--qt-primary);
            background: rgba(0, 214, 143, 0.12);
        }
        .qt-nav-links li a.qt-active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--qt-primary);
            border-radius: 2px;
        }
        .qt-nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .qt-nav-status {
            display: flex;
            align-items: center;
            gap: 6px;
            color: var(--qt-text-secondary);
            font-size: 0.75rem;
            padding: 6px 12px;
            background: var(--qt-bg-elevated);
            border-radius: 20px;
            border: 1px solid var(--qt-border);
        }
        .qt-status-dot {
            width: 8px;
            height: 8px;
            background: var(--qt-primary);
            border-radius: 50%;
            animation: qt-pulse 2s infinite;
        }
        @keyframes qt-pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }
        .qt-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            background: var(--qt-primary);
            color: #0a0f1a !important;
            font-weight: 700;
            font-size: 0.875rem;
            border-radius: 8px;
            border: none;
            white-space: nowrap;
            transition: var(--qt-transition);
        }
        .qt-nav-cta:hover {
            background: var(--qt-primary-light);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(0, 214, 143, 0.4);
        }
        .qt-nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--qt-text-primary);
            font-size: 1.4rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
        }
        .qt-nav-toggle:hover {
            background: var(--qt-bg-elevated);
        }

        /* ========== HERO ========== */
        .qt-hero {
            position: relative;
            padding: 70px 0 80px;
            background: linear-gradient(160deg, #0a0f1a 0%, #0f1b2d 55%, #0a1a1f 100%);
            border-bottom: 1px solid var(--qt-border);
            overflow: hidden;
        }
        .qt-hero::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 214, 143, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .qt-hero::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(77, 171, 247, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .qt-hero .qt-container {
            position: relative;
            z-index: 1;
        }
        .qt-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            background: rgba(0, 214, 143, 0.1);
            border: 1px solid rgba(0, 214, 143, 0.3);
            border-radius: 20px;
            color: var(--qt-primary-light);
            font-size: 0.8rem;
            font-weight: 500;
            margin-bottom: 22px;
        }
        .qt-hero h1 {
            font-size: 2.8rem;
            font-weight: 900;
            letter-spacing: -1px;
            line-height: 1.2;
            margin-bottom: 20px;
            color: var(--qt-text-primary);
            max-width: 700px;
        }
        .qt-hero h1 span {
            color: var(--qt-primary);
        }
        .qt-hero-desc {
            font-size: 1.1rem;
            color: var(--qt-text-secondary);
            max-width: 600px;
            margin-bottom: 30px;
            line-height: 1.8;
        }
        .qt-hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }
        .qt-btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            background: var(--qt-primary);
            color: #0a0f1a !important;
            font-weight: 700;
            font-size: 0.95rem;
            border-radius: 10px;
            border: none;
            transition: var(--qt-transition);
        }
        .qt-btn-primary:hover {
            background: var(--qt-primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 214, 143, 0.4);
        }
        .qt-btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            background: transparent;
            color: var(--qt-text-primary);
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: 10px;
            border: 1px solid var(--qt-border-light);
            transition: var(--qt-transition);
        }
        .qt-btn-outline:hover {
            border-color: var(--qt-primary);
            color: var(--qt-primary);
            background: rgba(0, 214, 143, 0.05);
        }
        .qt-hero-stats {
            display: flex;
            gap: 30px;
            flex-wrap: wrap;
        }
        .qt-hero-stat {
            text-align: left;
        }
        .qt-hero-stat .qt-stat-number {
            font-size: 1.8rem;
            font-weight: 900;
            color: var(--qt-primary);
            letter-spacing: -0.5px;
        }
        .qt-hero-stat .qt-stat-label {
            font-size: 0.8rem;
            color: var(--qt-text-muted);
            margin-top: 2px;
        }

        /* ========== SECTIONS ========== */
        .qt-section {
            padding: var(--qt-section-spacing) 0;
            position: relative;
        }
        .qt-section-alt {
            background: #0d1420;
            border-top: 1px solid var(--qt-border);
            border-bottom: 1px solid var(--qt-border);
        }
        .qt-section-title {
            font-size: 1.9rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--qt-text-primary);
            margin-bottom: 14px;
        }
        .qt-section-subtitle {
            font-size: 1rem;
            color: var(--qt-text-secondary);
            max-width: 620px;
            margin-bottom: 36px;
            line-height: 1.8;
        }

        /* ========== CARDS ========== */
        .qt-card {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 26px;
            transition: var(--qt-transition);
            height: 100%;
        }
        .qt-card:hover {
            background: var(--qt-bg-card-hover);
            border-color: var(--qt-border-light);
            transform: translateY(-3px);
            box-shadow: var(--qt-shadow-md);
        }
        .qt-card-icon {
            width: 48px;
            height: 48px;
            background: rgba(0, 214, 143, 0.1);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--qt-primary);
            font-size: 1.3rem;
            margin-bottom: 16px;
        }
        .qt-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 10px;
        }
        .qt-card p {
            font-size: 0.9rem;
            color: var(--qt-text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* ========== TABLE / DATA ========== */
        .qt-table-responsive {
            overflow-x: auto;
            border-radius: var(--qt-radius-md);
            border: 1px solid var(--qt-border);
            background: var(--qt-bg-card);
        }
        .qt-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
        }
        .qt-table th {
            font-size: 0.8rem;
            color: var(--qt-text-muted);
            font-weight: 600;
            text-align: left;
            padding: 14px 18px;
            border-bottom: 1px solid var(--qt-border);
            white-space: nowrap;
            background: var(--qt-bg-elevated);
        }
        .qt-table td {
            font-size: 0.9rem;
            color: var(--qt-text-secondary);
            padding: 13px 18px;
            border-bottom: 1px solid var(--qt-border);
            white-space: nowrap;
        }
        .qt-table tr:last-child td {
            border-bottom: none;
        }
        .qt-table tr:hover td {
            background: rgba(0, 214, 143, 0.04);
        }
        .qt-table .qt-match-name {
            color: var(--qt-text-primary);
            font-weight: 600;
        }
        .qt-table .qt-score {
            font-weight: 800;
            color: var(--qt-primary);
            font-size: 1rem;
        }
        .qt-badge-live {
            display: inline-block;
            padding: 3px 10px;
            background: rgba(255, 60, 60, 0.15);
            color: #ff6b6b;
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: 700;
            letter-spacing: 0.3px;
        }
        .qt-badge-done {
            display: inline-block;
            padding: 3px 10px;
            background: rgba(100, 116, 139, 0.15);
            color: var(--qt-text-muted);
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: 700;
        }
        .qt-badge-schedule {
            display: inline-block;
            padding: 3px 10px;
            background: rgba(77, 171, 247, 0.1);
            color: var(--qt-accent);
            border-radius: 4px;
            font-size: 0.7rem;
            font-weight: 700;
        }

        /* ========== FAQ ========== */
        .qt-faq-item {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--qt-transition);
        }
        .qt-faq-item:hover {
            border-color: var(--qt-border-light);
        }
        .qt-faq-question {
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            color: var(--qt-text-primary);
            font-size: 0.95rem;
            user-select: none;
            gap: 12px;
        }
        .qt-faq-question .qt-faq-icon {
            color: var(--qt-primary);
            font-size: 0.9rem;
            transition: var(--qt-transition);
            flex-shrink: 0;
        }
        .qt-faq-item.qt-open .qt-faq-icon {
            transform: rotate(180deg);
        }
        .qt-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 22px;
            color: var(--qt-text-secondary);
            font-size: 0.9rem;
            line-height: 1.8;
        }
        .qt-faq-item.qt-open .qt-faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        /* ========== CTA ========== */
        .qt-cta-section {
            background: linear-gradient(135deg, #0d1f1a 0%, #0a1a1e 100%);
            border: 1px solid rgba(0, 214, 143, 0.2);
            border-radius: var(--qt-radius-xl);
            padding: 50px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .qt-cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 214, 143, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .qt-cta-section h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--qt-text-primary);
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }
        .qt-cta-section p {
            color: var(--qt-text-secondary);
            max-width: 520px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
        }
        .qt-cta-section .qt-btn-primary {
            position: relative;
            z-index: 1;
            font-size: 1rem;
            padding: 16px 36px;
        }

        /* ========== FOOTER ========== */
        .qt-footer {
            background: #080c14;
            border-top: 1px solid var(--qt-border);
            padding: 52px 0 28px;
            margin-top: 0;
        }
        .qt-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }
        .qt-footer-brand {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--qt-text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .qt-footer-brand .qt-logo-icon {
            width: 30px;
            height: 30px;
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0a0f1a;
            font-size: 13px;
            font-weight: 900;
            flex-shrink: 0;
        }
        .qt-footer p {
            color: var(--qt-text-muted);
            font-size: 0.85rem;
            line-height: 1.7;
            max-width: 320px;
        }
        .qt-footer h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 14px;
        }
        .qt-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .qt-footer ul li {
            margin-bottom: 8px;
        }
        .qt-footer ul li a {
            color: var(--qt-text-muted);
            font-size: 0.85rem;
            transition: var(--qt-transition);
        }
        .qt-footer ul li a:hover {
            color: var(--qt-primary);
        }
        .qt-footer-bottom {
            border-top: 1px solid var(--qt-border);
            padding-top: 22px;
            text-align: center;
            color: var(--qt-text-muted);
            font-size: 0.8rem;
        }
        .qt-footer-bottom a {
            color: var(--qt-text-muted);
            text-decoration: none;
        }
        .qt-footer-bottom a:hover {
            color: var(--qt-primary);
        }

        /* ========== SCENARIO STRIP ========== */
        .qt-scenario-strip {
            background: linear-gradient(90deg, #0d1a14 0%, #0d1420 50%, #0d1a1e 100%);
            border-radius: var(--qt-radius-lg);
            border: 1px solid var(--qt-border);
            padding: 26px 28px;
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            margin-bottom: 20px;
            transition: var(--qt-transition);
        }
        .qt-scenario-strip:hover {
            border-color: var(--qt-border-light);
            box-shadow: var(--qt-shadow-sm);
        }
        .qt-scenario-strip .qt-scenario-icon {
            width: 52px;
            height: 52px;
            background: rgba(0, 214, 143, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--qt-primary);
            font-size: 1.5rem;
            flex-shrink: 0;
        }
        .qt-scenario-strip h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 4px;
        }
        .qt-scenario-strip p {
            font-size: 0.88rem;
            color: var(--qt-text-secondary);
            margin-bottom: 0;
            max-width: 700px;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .qt-nav-status {
                display: none;
            }
            .qt-hero h1 {
                font-size: 2.2rem;
            }
            .qt-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 768px) {
            .qt-nav-links {
                display: none;
                position: absolute;
                top: var(--qt-nav-height);
                left: 0;
                right: 0;
                background: #0a0f1a;
                border-bottom: 1px solid var(--qt-border);
                flex-direction: column;
                align-items: stretch;
                padding: 12px 18px;
                gap: 6px;
                box-shadow: var(--qt-shadow-lg);
            }
            .qt-nav-links.qt-open {
                display: flex;
            }
            .qt-nav-links li a {
                padding: 12px 16px;
                font-size: 0.95rem;
            }
            .qt-nav-links li a.qt-active::after {
                display: none;
            }
            .qt-nav-cta {
                display: none;
            }
            .qt-nav-toggle {
                display: block;
            }
            .qt-hero {
                padding: 48px 0 56px;
            }
            .qt-hero h1 {
                font-size: 1.8rem;
            }
            .qt-hero-desc {
                font-size: 0.95rem;
            }
            .qt-hero-stats {
                gap: 18px;
            }
            .qt-hero-stat .qt-stat-number {
                font-size: 1.4rem;
            }
            .qt-section {
                padding: 48px 0;
            }
            .qt-section-title {
                font-size: 1.5rem;
            }
            .qt-footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .qt-cta-section {
                padding: 36px 22px;
                border-radius: var(--qt-radius-lg);
            }
            .qt-cta-section h2 {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 520px) {
            .qt-container {
                padding: 0 14px;
            }
            .qt-hero h1 {
                font-size: 1.5rem;
                letter-spacing: -0.3px;
            }
            .qt-hero-actions {
                flex-direction: column;
            }
            .qt-hero-actions .qt-btn-primary,
            .qt-hero-actions .qt-btn-outline {
                width: 100%;
                justify-content: center;
            }
            .qt-hero-stats {
                flex-direction: column;
                gap: 10px;
            }
            .qt-scenario-strip {
                padding: 18px;
                gap: 14px;
            }
            .qt-scenario-strip .qt-scenario-icon {
                width: 40px;
                height: 40px;
                font-size: 1.1rem;
                border-radius: 8px;
            }
            .qt-scenario-strip h4 {
                font-size: 0.95rem;
            }
            .qt-card {
                padding: 20px;
            }
            .qt-section-title {
                font-size: 1.3rem;
            }
        }

/* roulang page: category2 */
:root {
            --qt-primary: #00d68f;
            --qt-primary-dark: #00b377;
            --qt-primary-light: #33e6a8;
            --qt-secondary: #ff8c42;
            --qt-accent: #4dabf7;
            --qt-bg-dark: #0a0f1a;
            --qt-bg-card: #111827;
            --qt-bg-card-hover: #1a2332;
            --qt-bg-elevated: #162032;
            --qt-text-primary: #f1f5f9;
            --qt-text-secondary: #94a3b8;
            --qt-text-muted: #64748b;
            --qt-border: #1e293b;
            --qt-border-light: #2d3b4f;
            --qt-radius-sm: 8px;
            --qt-radius-md: 14px;
            --qt-radius-lg: 20px;
            --qt-radius-xl: 28px;
            --qt-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --qt-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
            --qt-shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.5);
            --qt-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --qt-font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --qt-section-spacing: 72px;
            --qt-nav-height: 68px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--qt-font-sans);
            background-color: var(--qt-bg-dark);
            color: var(--qt-text-primary);
            line-height: 1.7;
            overflow-x: hidden;
            font-size: 16px;
        }

        a {
            color: var(--qt-primary);
            text-decoration: none;
            transition: var(--qt-transition);
        }
        a:hover {
            color: var(--qt-primary-light);
            text-decoration: none;
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--qt-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

        /* ========== NAVBAR ========== */
        .qt-navbar {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(10, 15, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--qt-border);
            height: var(--qt-nav-height);
            display: flex;
            align-items: center;
            transition: var(--qt-transition);
        }
        .qt-navbar.scrolled {
            background: rgba(10, 15, 26, 0.98);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }
        .qt-navbar .qt-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .qt-nav-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--qt-text-primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .qt-nav-logo .qt-logo-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0a0f1a;
            font-size: 16px;
            font-weight: 900;
            flex-shrink: 0;
        }
        .qt-nav-logo:hover {
            color: var(--qt-text-primary);
        }
        .qt-nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
        }
        .qt-nav-links::-webkit-scrollbar {
            display: none;
        }
        .qt-nav-links li a {
            display: inline-block;
            padding: 8px 14px;
            color: var(--qt-text-secondary);
            font-size: 0.875rem;
            font-weight: 500;
            border-radius: 8px;
            white-space: nowrap;
            transition: var(--qt-transition);
            position: relative;
        }
        .qt-nav-links li a:hover {
            color: var(--qt-text-primary);
            background: var(--qt-bg-elevated);
        }
        .qt-nav-links li a.qt-active {
            color: var(--qt-primary);
            background: rgba(0, 214, 143, 0.12);
        }
        .qt-nav-links li a.qt-active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--qt-primary);
            border-radius: 2px;
        }
        .qt-nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .qt-nav-status {
            display: flex;
            align-items: center;
            gap: 6px;
            color: var(--qt-text-secondary);
            font-size: 0.75rem;
            padding: 6px 12px;
            background: var(--qt-bg-elevated);
            border-radius: 20px;
            border: 1px solid var(--qt-border);
            white-space: nowrap;
        }
        .qt-status-dot {
            width: 8px;
            height: 8px;
            background: var(--qt-primary);
            border-radius: 50%;
            animation: qt-pulse 1.5s ease-in-out infinite;
        }
        @keyframes qt-pulse {
            0%, 100% { box-shadow: 0 0 0 0 rgba(0, 214, 143, 0.6); }
            50% { box-shadow: 0 0 0 6px rgba(0, 214, 143, 0); }
        }
        .qt-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
            color: #0a0f1a;
            font-size: 0.875rem;
            font-weight: 700;
            border-radius: 20px;
            transition: var(--qt-transition);
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .qt-nav-cta:hover {
            background: linear-gradient(135deg, var(--qt-primary-light), var(--qt-primary));
            color: #0a0f1a;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(0, 214, 143, 0.3);
        }
        .qt-nav-toggle {
            display: none;
            background: var(--qt-bg-elevated);
            border: 1px solid var(--qt-border);
            color: var(--qt-text-primary);
            width: 40px;
            height: 40px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 1.1rem;
            transition: var(--qt-transition);
        }
        .qt-nav-toggle:hover {
            background: var(--qt-bg-card-hover);
            border-color: var(--qt-border-light);
        }

        /* ========== HERO ========== */
        .qt-hero {
            position: relative;
            padding: 80px 0 90px;
            background-image: linear-gradient(180deg, rgba(10, 15, 26, 0.88) 0%, rgba(10, 15, 26, 0.94) 100%), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--qt-border);
            overflow: hidden;
        }
        .qt-hero::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 214, 143, 0.08) 0%, transparent 70%);
            pointer-events: none;
            border-radius: 50%;
        }
        .qt-hero .qt-container {
            position: relative;
            z-index: 2;
        }
        .qt-hero-grid {
            display: grid;
            grid-template-columns: 1.15fr 0.85fr;
            gap: 56px;
            align-items: center;
        }
        .qt-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 214, 143, 0.12);
            border: 1px solid rgba(0, 214, 143, 0.3);
            color: var(--qt-primary);
            font-size: 0.875rem;
            font-weight: 600;
            padding: 8px 16px;
            border-radius: 20px;
            margin-bottom: 20px;
        }
        .qt-hero h1 {
            font-size: 2.85rem;
            font-weight: 800;
            letter-spacing: -1px;
            line-height: 1.2;
            margin-bottom: 20px;
            color: var(--qt-text-primary);
        }
        .qt-hero h1 .qt-gradient-text {
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .qt-hero-subtitle {
            font-size: 1.1rem;
            color: var(--qt-text-secondary);
            max-width: 560px;
            margin-bottom: 24px;
            line-height: 1.8;
        }
        .qt-hero-toc {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 20px 24px;
            margin-bottom: 28px;
            max-width: 540px;
        }
        .qt-hero-toc-title {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .qt-hero-toc-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 8px 20px;
        }
        .qt-hero-toc-list li {
            font-size: 0.85rem;
            color: var(--qt-text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .qt-hero-toc-list li i {
            color: var(--qt-primary);
            font-size: 0.7rem;
        }
        .qt-hero-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .qt-btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
            color: #0a0f1a;
            font-weight: 700;
            font-size: 1rem;
            border-radius: var(--qt-radius-sm);
            border: none;
            cursor: pointer;
            transition: var(--qt-transition);
        }
        .qt-btn-primary:hover {
            background: linear-gradient(135deg, var(--qt-primary-light), var(--qt-primary));
            color: #0a0f1a;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(0, 214, 143, 0.3);
        }
        .qt-btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 24px;
            background: transparent;
            color: var(--qt-text-primary);
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--qt-radius-sm);
            border: 1px solid var(--qt-border-light);
            cursor: pointer;
            transition: var(--qt-transition);
        }
        .qt-btn-outline:hover {
            border-color: var(--qt-primary);
            color: var(--qt-primary);
            background: rgba(0, 214, 143, 0.06);
        }
        .qt-hero-whitepaper {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-lg);
            overflow: hidden;
            box-shadow: var(--qt-shadow-lg);
            transition: var(--qt-transition);
        }
        .qt-hero-whitepaper:hover {
            border-color: rgba(0, 214, 143, 0.45);
            box-shadow: 0 24px 56px rgba(0, 0, 0, 0.55), 0 0 30px rgba(0, 214, 143, 0.06);
        }
        .qt-hero-whitepaper-img {
            position: relative;
            height: 260px;
            overflow: hidden;
        }
        .qt-hero-whitepaper-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .qt-hero-whitepaper-img::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60%;
            background: linear-gradient(180deg, transparent 0%, rgba(10, 15, 26, 0.9) 100%);
        }
        .qt-hero-whitepaper-body {
            padding: 20px 24px 24px;
            margin-top: -30px;
            position: relative;
            z-index: 1;
        }
        .qt-hero-whitepaper-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 8px;
        }
        .qt-hero-whitepaper-body p {
            font-size: 0.875rem;
            color: var(--qt-text-secondary);
            margin-bottom: 14px;
            line-height: 1.6;
        }
        .qt-hero-whitepaper-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--qt-text-muted);
            margin-bottom: 16px;
        }
        .qt-hero-whitepaper-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        /* ========== SECTION COMMON ========== */
        .qt-section {
            padding: var(--qt-section-spacing) 0;
            border-bottom: 1px solid var(--qt-border);
        }
        .qt-section:nth-child(even) {
            background: rgba(17, 24, 39, 0.4);
        }
        .qt-section-header {
            margin-bottom: 40px;
        }
        .qt-section-header .qt-section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--qt-primary);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 12px;
        }
        .qt-section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--qt-text-primary);
            margin-bottom: 14px;
        }
        .qt-section-header p {
            font-size: 1rem;
            color: var(--qt-text-secondary);
            max-width: 680px;
            line-height: 1.8;
        }

        /* ========== VALUE PROPOSITION ========== */
        .qt-value-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .qt-value-card {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 28px 24px;
            transition: var(--qt-transition);
            position: relative;
            overflow: hidden;
        }
        .qt-value-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--qt-primary), var(--qt-accent));
            opacity: 0;
            transition: var(--qt-transition);
        }
        .qt-value-card:hover {
            border-color: var(--qt-border-light);
            background: var(--qt-bg-card-hover);
            transform: translateY(-4px);
            box-shadow: var(--qt-shadow-md);
        }
        .qt-value-card:hover::before {
            opacity: 1;
        }
        .qt-value-icon {
            width: 48px;
            height: 48px;
            background: rgba(0, 214, 143, 0.12);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--qt-primary);
            font-size: 1.3rem;
            margin-bottom: 16px;
        }
        .qt-value-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 10px;
        }
        .qt-value-card p {
            font-size: 0.875rem;
            color: var(--qt-text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ========== FEATURE GROUP ========== */
        .qt-feature-tabs {
            display: flex;
            gap: 8px;
            margin-bottom: 32px;
            flex-wrap: wrap;
        }
        .qt-feature-tab {
            padding: 10px 20px;
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: 20px;
            color: var(--qt-text-secondary);
            font-size: 0.875rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--qt-transition);
            white-space: nowrap;
        }
        .qt-feature-tab:hover {
            color: var(--qt-text-primary);
            border-color: var(--qt-border-light);
            background: var(--qt-bg-elevated);
        }
        .qt-feature-tab.qt-feature-tab-active {
            background: rgba(0, 214, 143, 0.12);
            color: var(--qt-primary);
            border-color: rgba(0, 214, 143, 0.35);
        }
        .qt-feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .qt-feature-card {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 24px;
            transition: var(--qt-transition);
        }
        .qt-feature-card:hover {
            border-color: var(--qt-border-light);
            background: var(--qt-bg-card-hover);
            box-shadow: var(--qt-shadow-sm);
        }
        .qt-feature-card-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 12px;
        }
        .qt-feature-card-header h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin: 0;
        }
        .qt-feature-card .qt-badge {
            font-size: 0.7rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 12px;
        }
        .qt-badge-green {
            background: rgba(0, 214, 143, 0.15);
            color: var(--qt-primary);
        }
        .qt-badge-orange {
            background: rgba(255, 140, 66, 0.15);
            color: var(--qt-secondary);
        }
        .qt-badge-blue {
            background: rgba(77, 171, 247, 0.15);
            color: var(--qt-accent);
        }
        .qt-feature-card p {
            font-size: 0.85rem;
            color: var(--qt-text-secondary);
            line-height: 1.65;
            margin-bottom: 0;
        }
        .qt-feature-card ul {
            list-style: none;
            margin: 12px 0 0;
            padding: 0;
        }
        .qt-feature-card ul li {
            font-size: 0.85rem;
            color: var(--qt-text-secondary);
            padding: 4px 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .qt-feature-card ul li i {
            color: var(--qt-primary);
            font-size: 0.7rem;
        }

        /* ========== USE SCENARIOS ========== */
        .qt-scenario-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .qt-scenario-card {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 28px;
            display: flex;
            gap: 20px;
            transition: var(--qt-transition);
        }
        .qt-scenario-card:hover {
            border-color: var(--qt-border-light);
            background: var(--qt-bg-card-hover);
            transform: translateY(-3px);
            box-shadow: var(--qt-shadow-md);
        }
        .qt-scenario-icon {
            width: 52px;
            height: 52px;
            min-width: 52px;
            background: rgba(0, 214, 143, 0.12);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--qt-primary);
            font-size: 1.4rem;
        }
        .qt-scenario-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 8px;
        }
        .qt-scenario-card p {
            font-size: 0.875rem;
            color: var(--qt-text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ========== CASE STUDIES ========== */
        .qt-case-card {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            overflow: hidden;
            transition: var(--qt-transition);
            height: 100%;
        }
        .qt-case-card:hover {
            border-color: var(--qt-border-light);
            box-shadow: var(--qt-shadow-md);
            transform: translateY(-4px);
        }
        .qt-case-img {
            height: 180px;
            overflow: hidden;
        }
        .qt-case-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .qt-case-card:hover .qt-case-img img {
            transform: scale(1.05);
        }
        .qt-case-body {
            padding: 20px;
        }
        .qt-case-body h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 8px;
        }
        .qt-case-body p {
            font-size: 0.85rem;
            color: var(--qt-text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .qt-case-body .qt-case-link {
            font-size: 0.85rem;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* ========== PRICING ========== */
        .qt-pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            align-items: start;
        }
        .qt-pricing-card {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-lg);
            padding: 32px 28px;
            transition: var(--qt-transition);
            position: relative;
        }
        .qt-pricing-card:hover {
            border-color: var(--qt-border-light);
            box-shadow: var(--qt-shadow-md);
        }
        .qt-pricing-card.qt-pricing-featured {
            border-color: rgba(0, 214, 143, 0.45);
            background: linear-gradient(180deg, rgba(0, 214, 143, 0.08) 0%, var(--qt-bg-card) 40%);
            box-shadow: var(--qt-shadow-md);
        }
        .qt-pricing-featured-tag {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
            color: #0a0f1a;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 5px 16px;
            border-radius: 14px;
            white-space: nowrap;
        }
        .qt-pricing-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 6px;
        }
        .qt-pricing-price {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--qt-text-primary);
            letter-spacing: -1px;
            margin: 12px 0 4px;
        }
        .qt-pricing-price span {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--qt-text-secondary);
            letter-spacing: normal;
        }
        .qt-pricing-desc {
            font-size: 0.85rem;
            color: var(--qt-text-secondary);
            margin-bottom: 20px;
        }
        .qt-pricing-card ul {
            list-style: none;
            margin: 0 0 24px;
            padding: 0;
        }
        .qt-pricing-card ul li {
            font-size: 0.875rem;
            color: var(--qt-text-secondary);
            padding: 6px 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .qt-pricing-card ul li i {
            color: var(--qt-primary);
            font-size: 0.75rem;
        }
        .qt-pricing-card ul li.qt-pricing-excluded {
            color: var(--qt-text-muted);
            text-decoration: line-through;
        }
        .qt-pricing-card ul li.qt-pricing-excluded i {
            color: var(--qt-text-muted);
        }

        /* ========== STATS ========== */
        .qt-stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .qt-stat-block {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 28px 24px;
            text-align: center;
            transition: var(--qt-transition);
        }
        .qt-stat-block:hover {
            border-color: var(--qt-border-light);
            background: var(--qt-bg-card-hover);
        }
        .qt-stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--qt-primary);
            letter-spacing: -1px;
            margin-bottom: 4px;
        }
        .qt-stat-label {
            font-size: 0.9rem;
            color: var(--qt-text-secondary);
        }

        /* ========== FAQ ========== */
        .qt-faq-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }
        .qt-faq-item {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            overflow: hidden;
            transition: var(--qt-transition);
        }
        .qt-faq-item:hover {
            border-color: var(--qt-border-light);
        }
        .qt-faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            background: transparent;
            border: none;
            color: var(--qt-text-primary);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            text-align: left;
            transition: var(--qt-transition);
        }
        .qt-faq-question i {
            color: var(--qt-text-muted);
            transition: var(--qt-transition);
            flex-shrink: 0;
        }
        .qt-faq-question:hover {
            color: var(--qt-primary);
        }
        .qt-faq-question:hover i {
            color: var(--qt-primary);
        }
        .qt-faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            color: var(--qt-text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            padding: 0 20px;
        }
        .qt-faq-item.qt-faq-open .qt-faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }
        .qt-faq-item.qt-faq-open .qt-faq-question i {
            transform: rotate(180deg);
            color: var(--qt-primary);
        }

        /* ========== CTA ========== */
        .qt-cta-section {
            padding: 70px 0;
            background: linear-gradient(135deg, rgba(0, 214, 143, 0.08) 0%, rgba(77, 171, 247, 0.05) 100%);
            border-bottom: 1px solid var(--qt-border);
        }
        .qt-cta-box {
            background: linear-gradient(135deg, var(--qt-bg-card), var(--qt-bg-elevated));
            border: 1px solid rgba(0, 214, 143, 0.3);
            border-radius: var(--qt-radius-xl);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .qt-cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 214, 143, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .qt-cta-box h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--qt-text-primary);
            letter-spacing: -0.5px;
            margin-bottom: 14px;
            position: relative;
        }
        .qt-cta-box p {
            font-size: 1rem;
            color: var(--qt-text-secondary);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.8;
            position: relative;
        }
        .qt-cta-box .qt-btn-primary {
            font-size: 1.05rem;
            padding: 15px 36px;
            position: relative;
        }

        /* ========== FOOTER ========== */
        .qt-footer {
            background: var(--qt-bg-dark);
            border-top: 1px solid var(--qt-border);
            padding: 52px 0 24px;
        }
        .qt-footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .qt-footer-brand {
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--qt-text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .qt-footer-brand .qt-logo-icon {
            width: 32px;
            height: 32px;
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0a0f1a;
            font-size: 14px;
            font-weight: 900;
        }
        .qt-footer p {
            font-size: 0.875rem;
            color: var(--qt-text-secondary);
            line-height: 1.7;
        }
        .qt-footer h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 16px;
        }
        .qt-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .qt-footer ul li {
            margin-bottom: 10px;
        }
        .qt-footer ul li a {
            font-size: 0.85rem;
            color: var(--qt-text-secondary);
            transition: var(--qt-transition);
        }
        .qt-footer ul li a:hover {
            color: var(--qt-primary);
            padding-left: 4px;
        }
        .qt-footer-bottom {
            border-top: 1px solid var(--qt-border);
            padding-top: 20px;
        }
        .qt-footer-bottom p {
            font-size: 0.8rem;
            color: var(--qt-text-muted);
        }
        .qt-footer-bottom a {
            color: var(--qt-text-muted);
            transition: var(--qt-transition);
        }
        .qt-footer-bottom a:hover {
            color: var(--qt-primary);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root { --qt-section-spacing: 56px; }
            .qt-hero-grid { grid-template-columns: 1fr; gap: 40px; }
            .qt-hero-subtitle { max-width: 100%; }
            .qt-value-grid { grid-template-columns: repeat(2, 1fr); }
            .qt-feature-grid { grid-template-columns: repeat(2, 1fr); }
            .qt-pricing-grid { grid-template-columns: 1fr; max-width: 500px; margin: 0 auto; }
            .qt-stats-grid { grid-template-columns: repeat(2, 1fr); }
            .qt-footer-grid { grid-template-columns: 1fr 1fr; }
            .qt-nav-status { display: none; }
        }
        @media (max-width: 768px) {
            :root { --qt-section-spacing: 44px; --qt-nav-height: 60px; }
            .qt-nav-links {
                display: none;
                position: absolute;
                top: var(--qt-nav-height);
                left: 0;
                right: 0;
                background: rgba(10, 15, 26, 0.98);
                border-bottom: 1px solid var(--qt-border);
                padding: 12px 16px;
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                box-shadow: var(--qt-shadow-md);
            }
            .qt-nav-links.qt-nav-open {
                display: flex;
            }
            .qt-nav-links li a { display: block; padding: 10px 14px; }
            .qt-nav-toggle { display: flex; }
            .qt-nav-cta { padding: 7px 14px; font-size: 0.8rem; }
            .qt-hero { padding: 50px 0 60px; }
            .qt-hero h1 { font-size: 1.9rem; }
            .qt-hero-toc-list { grid-template-columns: 1fr; }
            .qt-value-grid { grid-template-columns: 1fr; }
            .qt-feature-grid { grid-template-columns: 1fr; }
            .qt-scenario-grid { grid-template-columns: 1fr; }
            .qt-stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .qt-stat-number { font-size: 1.8rem; }
            .qt-footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .qt-cta-box { padding: 32px 20px; }
            .qt-section-header h2 { font-size: 1.5rem; }
        }
        @media (max-width: 520px) {
            .qt-container { padding: 0 12px; }
            .qt-hero h1 { font-size: 1.6rem; letter-spacing: -0.5px; }
            .qt-hero-subtitle { font-size: 0.95rem; }
            .qt-hero-actions { flex-direction: column; align-items: stretch; }
            .qt-btn-primary, .qt-btn-outline { justify-content: center; width: 100%; }
            .qt-nav-cta { display: none; }
            .qt-stats-grid { grid-template-columns: 1fr; }
            .qt-stat-block { padding: 20px 16px; }
            .qt-pricing-card { padding: 22px 18px; }
            .qt-scenario-card { flex-direction: column; gap: 14px; }
            .qt-hero-whitepaper-img { height: 180px; }
        }

/* roulang page: category4 */
:root {
            --qt-primary: #00d68f;
            --qt-primary-dark: #00b377;
            --qt-primary-light: #33e6a8;
            --qt-secondary: #ff8c42;
            --qt-accent: #4dabf7;
            --qt-bg-dark: #0a0f1a;
            --qt-bg-card: #111827;
            --qt-bg-card-hover: #1a2332;
            --qt-bg-elevated: #162032;
            --qt-text-primary: #f1f5f9;
            --qt-text-secondary: #94a3b8;
            --qt-text-muted: #64748b;
            --qt-border: #1e293b;
            --qt-border-light: #2d3b4f;
            --qt-radius-sm: 8px;
            --qt-radius-md: 14px;
            --qt-radius-lg: 20px;
            --qt-radius-xl: 28px;
            --qt-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --qt-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
            --qt-shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.5);
            --qt-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --qt-font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --qt-section-spacing: 72px;
            --qt-nav-height: 68px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--qt-font-sans);
            background-color: var(--qt-bg-dark);
            color: var(--qt-text-primary);
            line-height: 1.7;
            overflow-x: hidden;
            font-size: 16px;
        }

        a {
            color: var(--qt-primary);
            text-decoration: none;
            transition: var(--qt-transition);
        }
        a:hover {
            color: var(--qt-primary-light);
            text-decoration: none;
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--qt-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

        @media (max-width: 576px) {
            .qt-container {
                padding: 0 16px;
            }
        }

        /* ========== NAVBAR ========== */
        .qt-navbar {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(10, 15, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--qt-border);
            height: var(--qt-nav-height);
            display: flex;
            align-items: center;
            transition: var(--qt-transition);
        }
        .qt-navbar.scrolled {
            background: rgba(10, 15, 26, 0.98);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }
        .qt-navbar .qt-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .qt-nav-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--qt-text-primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .qt-nav-logo .qt-logo-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0a0f1a;
            font-size: 16px;
            font-weight: 900;
            flex-shrink: 0;
        }
        .qt-nav-logo:hover {
            color: var(--qt-text-primary);
        }
        .qt-nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
        }
        .qt-nav-links::-webkit-scrollbar {
            display: none;
        }
        .qt-nav-links li a {
            display: inline-block;
            padding: 8px 14px;
            color: var(--qt-text-secondary);
            font-size: 0.875rem;
            font-weight: 500;
            border-radius: 8px;
            white-space: nowrap;
            transition: var(--qt-transition);
            position: relative;
        }
        .qt-nav-links li a:hover {
            color: var(--qt-text-primary);
            background: var(--qt-bg-elevated);
        }
        .qt-nav-links li a.qt-active {
            color: var(--qt-primary);
            background: rgba(0, 214, 143, 0.12);
        }
        .qt-nav-links li a.qt-active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--qt-primary);
            border-radius: 2px;
        }
        .qt-nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .qt-nav-status {
            display: flex;
            align-items: center;
            gap: 6px;
            color: var(--qt-text-secondary);
            font-size: 0.75rem;
            padding: 6px 12px;
            background: var(--qt-bg-elevated);
            border-radius: 20px;
            border: 1px solid var(--qt-border);
            white-space: nowrap;
        }
        .qt-status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--qt-primary);
            animation: qt-pulse-dot 2s infinite;
        }
        @keyframes qt-pulse-dot {
            0%, 100% { box-shadow: 0 0 0 0 rgba(0, 214, 143, 0.5); }
            50% { box-shadow: 0 0 0 6px rgba(0, 214, 143, 0); }
        }
        .qt-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
            color: #0a0f1a;
            font-size: 0.875rem;
            font-weight: 700;
            border-radius: 8px;
            white-space: nowrap;
            transition: var(--qt-transition);
            border: none;
        }
        .qt-nav-cta:hover {
            color: #0a0f1a;
            background: linear-gradient(135deg, var(--qt-primary-light), var(--qt-primary));
            box-shadow: 0 4px 16px rgba(0, 214, 143, 0.3);
            transform: translateY(-1px);
        }
        .qt-nav-toggle {
            display: none;
            background: var(--qt-bg-elevated);
            border: 1px solid var(--qt-border);
            color: var(--qt-text-primary);
            width: 40px;
            height: 40px;
            border-radius: 8px;
            font-size: 1.1rem;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--qt-transition);
        }
        .qt-nav-toggle:hover {
            background: var(--qt-bg-card-hover);
            border-color: var(--qt-border-light);
        }

        /* ========== PAGE HERO ========== */
        .qt-page-hero {
            position: relative;
            padding: 80px 0 64px;
            background: linear-gradient(160deg, #0c1526 0%, #0a0f1a 55%, #0d1a2b 100%);
            border-bottom: 1px solid var(--qt-border);
            overflow: hidden;
        }
        .qt-page-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 55%;
            height: 80%;
            background: radial-gradient(ellipse at center, rgba(0, 214, 143, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .qt-page-hero::after {
            content: '';
            position: absolute;
            bottom: -35%;
            left: -5%;
            width: 45%;
            height: 70%;
            background: radial-gradient(ellipse at center, rgba(77, 171, 247, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .qt-page-hero .qt-container {
            position: relative;
            z-index: 2;
        }
        .qt-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            color: var(--qt-text-muted);
            margin-bottom: 24px;
        }
        .qt-breadcrumb a {
            color: var(--qt-text-secondary);
        }
        .qt-breadcrumb a:hover {
            color: var(--qt-primary);
        }
        .qt-breadcrumb .qt-sep {
            opacity: 0.5;
        }
        .qt-page-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: -1px;
            margin-bottom: 20px;
            color: var(--qt-text-primary);
            max-width: 800px;
            line-height: 1.25;
        }
        .qt-page-hero h1 .qt-highlight {
            color: var(--qt-primary);
        }
        .qt-page-hero p.qt-hero-sub {
            font-size: 1.1rem;
            color: var(--qt-text-secondary);
            max-width: 680px;
            margin-bottom: 28px;
            line-height: 1.8;
        }
        .qt-hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .qt-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            background: var(--qt-bg-elevated);
            border: 1px solid var(--qt-border);
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--qt-text-secondary);
        }
        .qt-tag i {
            color: var(--qt-primary);
            font-size: 0.7rem;
        }

        /* ========== SECTION BASICS ========== */
        .qt-section {
            padding: var(--qt-section-spacing) 0;
            position: relative;
        }
        .qt-section-alt {
            background: #0c1220;
            border-top: 1px solid var(--qt-border);
            border-bottom: 1px solid var(--qt-border);
        }
        .qt-section-title {
            font-size: 1.75rem;
            font-weight: 700;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            color: var(--qt-text-primary);
        }
        .qt-section-desc {
            font-size: 1rem;
            color: var(--qt-text-secondary);
            max-width: 600px;
            margin-bottom: 40px;
            line-height: 1.8;
        }
        .qt-section-head {
            margin-bottom: 40px;
        }
        .qt-section-head .qt-label {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--qt-primary);
            letter-spacing: 1px;
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        /* ========== CARDS ========== */
        .qt-card {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 24px;
            transition: var(--qt-transition);
            height: 100%;
        }
        .qt-card:hover {
            background: var(--qt-bg-card-hover);
            border-color: var(--qt-border-light);
            box-shadow: var(--qt-shadow-md);
            transform: translateY(-3px);
        }
        .qt-card-icon {
            width: 48px;
            height: 48px;
            background: rgba(0, 214, 143, 0.1);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--qt-primary);
            margin-bottom: 16px;
        }
        .qt-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 10px;
        }
        .qt-card p {
            font-size: 0.9rem;
            color: var(--qt-text-secondary);
            margin-bottom: 0;
            line-height: 1.75;
        }

        /* ========== BUTTONS ========== */
        .qt-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 0.95rem;
            font-weight: 700;
            border-radius: 8px;
            border: none;
            cursor: pointer;
            transition: var(--qt-transition);
            text-decoration: none;
        }
        .qt-btn-primary {
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
            color: #0a0f1a;
        }
        .qt-btn-primary:hover {
            color: #0a0f1a;
            background: linear-gradient(135deg, var(--qt-primary-light), var(--qt-primary));
            box-shadow: 0 6px 24px rgba(0, 214, 143, 0.35);
            transform: translateY(-2px);
        }
        .qt-btn-outline {
            background: transparent;
            border: 1px solid var(--qt-border-light);
            color: var(--qt-text-primary);
        }
        .qt-btn-outline:hover {
            border-color: var(--qt-primary);
            color: var(--qt-primary);
            background: rgba(0, 214, 143, 0.06);
        }
        .qt-btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }

        /* ========== STATS ========== */
        .qt-stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .qt-stat-card {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 24px;
            text-align: center;
            transition: var(--qt-transition);
        }
        .qt-stat-card:hover {
            border-color: var(--qt-primary);
            box-shadow: var(--qt-shadow-sm);
        }
        .qt-stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--qt-primary);
            letter-spacing: -1px;
            margin-bottom: 4px;
        }
        .qt-stat-label {
            font-size: 0.85rem;
            color: var(--qt-text-secondary);
        }

        /* ========== INFO LIST ========== */
        .qt-info-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .qt-info-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--qt-border);
            font-size: 0.95rem;
            color: var(--qt-text-secondary);
            line-height: 1.7;
        }
        .qt-info-list li:last-child {
            border-bottom: none;
        }
        .qt-info-list li i {
            color: var(--qt-primary);
            font-size: 0.9rem;
            margin-top: 4px;
            flex-shrink: 0;
        }

        /* ========== STEP FLOW ========== */
        .qt-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: step;
        }
        .qt-step {
            position: relative;
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 28px 20px 20px;
            transition: var(--qt-transition);
        }
        .qt-step:hover {
            border-color: var(--qt-primary);
        }
        .qt-step-number {
            position: absolute;
            top: -16px;
            left: 20px;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
            color: #0a0f1a;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1rem;
        }
        .qt-step h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 8px;
            margin-top: 8px;
        }
        .qt-step p {
            font-size: 0.85rem;
            color: var(--qt-text-secondary);
            margin-bottom: 0;
            line-height: 1.75;
        }

        /* ========== IMAGE CARD ========== */
        .qt-img-card {
            position: relative;
            border-radius: var(--qt-radius-lg);
            overflow: hidden;
            border: 1px solid var(--qt-border);
            transition: var(--qt-transition);
        }
        .qt-img-card:hover {
            border-color: var(--qt-border-light);
            box-shadow: var(--qt-shadow-md);
        }
        .qt-img-card img {
            width: 100%;
            height: 240px;
            object-fit: cover;
        }
        .qt-img-card .qt-img-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            padding: 40px 20px 16px;
            background: linear-gradient(transparent, rgba(10, 15, 26, 0.95));
        }
        .qt-img-card .qt-img-overlay h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 4px;
        }
        .qt-img-card .qt-img-overlay p {
            font-size: 0.8rem;
            color: var(--qt-text-secondary);
            margin-bottom: 0;
        }

        /* ========== FEATURE ROW ========== */
        .qt-feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .qt-feature-row .qt-feature-content h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 14px;
        }
        .qt-feature-row .qt-feature-content p {
            font-size: 0.95rem;
            color: var(--qt-text-secondary);
            line-height: 1.85;
            margin-bottom: 16px;
        }
        .qt-feature-row .qt-feature-img {
            border-radius: var(--qt-radius-lg);
            overflow: hidden;
            border: 1px solid var(--qt-border);
        }
        .qt-feature-row .qt-feature-img img {
            width: 100%;
            height: 280px;
            object-fit: cover;
        }

        /* ========== FAQ ========== */
        .qt-faq-wrap .accordion-item {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
        }
        .qt-faq-wrap .accordion-button {
            background: var(--qt-bg-card);
            color: var(--qt-text-primary);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 18px 20px;
            box-shadow: none;
            border-radius: var(--qt-radius-md) !important;
        }
        .qt-faq-wrap .accordion-button:not(.collapsed) {
            background: var(--qt-bg-elevated);
            color: var(--qt-primary);
            box-shadow: none;
        }
        .qt-faq-wrap .accordion-button:focus {
            box-shadow: none;
        }
        .qt-faq-wrap .accordion-button::after {
            filter: invert(0.7);
        }
        .qt-faq-wrap .accordion-body {
            background: var(--qt-bg-card);
            color: var(--qt-text-secondary);
            font-size: 0.9rem;
            padding: 16px 20px 20px;
            line-height: 1.8;
        }

        /* ========== CTA ========== */
        .qt-cta-box {
            background: linear-gradient(135deg, #0d1f2d 0%, #0c1526 50%, #0d1a2b 100%);
            border: 1px solid var(--qt-border-light);
            border-radius: var(--qt-radius-xl);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .qt-cta-box::before {
            content: '';
            position: absolute;
            top: -60%;
            left: 50%;
            transform: translateX(-50%);
            width: 70%;
            height: 120%;
            background: radial-gradient(ellipse at center, rgba(0, 214, 143, 0.08) 0%, transparent 65%);
            pointer-events: none;
        }
        .qt-cta-box h2 {
            font-size: 1.8rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--qt-text-primary);
            position: relative;
            z-index: 1;
        }
        .qt-cta-box p {
            font-size: 1rem;
            color: var(--qt-text-secondary);
            max-width: 560px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
            line-height: 1.8;
        }
        .qt-cta-box .qt-btn {
            position: relative;
            z-index: 1;
        }

        /* ========== FOOTER ========== */
        .qt-footer {
            background: #080d16;
            border-top: 1px solid var(--qt-border);
            padding: 56px 0 28px;
            margin-top: 0;
        }
        .qt-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 40px;
        }
        .qt-footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--qt-text-primary);
            margin-bottom: 14px;
        }
        .qt-footer-brand .qt-logo-icon {
            width: 30px;
            height: 30px;
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0a0f1a;
            font-size: 14px;
            font-weight: 900;
        }
        .qt-footer p {
            font-size: 0.88rem;
            color: var(--qt-text-secondary);
            line-height: 1.8;
            max-width: 360px;
        }
        .qt-footer h5 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 16px;
        }
        .qt-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .qt-footer ul li {
            margin-bottom: 10px;
        }
        .qt-footer ul li a {
            font-size: 0.85rem;
            color: var(--qt-text-secondary);
            transition: var(--qt-transition);
        }
        .qt-footer ul li a:hover {
            color: var(--qt-primary);
        }
        .qt-footer-bottom {
            border-top: 1px solid var(--qt-border);
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
            color: var(--qt-text-muted);
            line-height: 2;
        }
        .qt-footer-bottom a {
            color: var(--qt-text-muted);
        }
        .qt-footer-bottom a:hover {
            color: var(--qt-primary);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 992px) {
            .qt-stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .qt-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .qt-footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .qt-feature-row {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 768px) {
            .qt-nav-links {
                display: none;
                position: absolute;
                top: var(--qt-nav-height);
                left: 0;
                right: 0;
                background: rgba(10, 15, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: stretch;
                padding: 16px;
                border-bottom: 1px solid var(--qt-border);
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
                overflow-x: visible;
            }
            .qt-nav-links.qt-open {
                display: flex;
            }
            .qt-nav-links li a {
                padding: 12px 16px;
                font-size: 0.95rem;
                display: block;
            }
            .qt-nav-links li a.qt-active::after {
                display: none;
            }
            .qt-nav-status {
                display: none;
            }
            .qt-nav-toggle {
                display: flex;
            }
            .qt-page-hero h1 {
                font-size: 2rem;
            }
            .qt-page-hero p.qt-hero-sub {
                font-size: 1rem;
            }
            .qt-section {
                padding: 48px 0;
            }
            .qt-section-title {
                font-size: 1.4rem;
            }
            .qt-cta-box {
                padding: 36px 24px;
            }
            .qt-cta-box h2 {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 520px) {
            .qt-stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .qt-stat-number {
                font-size: 1.5rem;
            }
            .qt-steps {
                grid-template-columns: 1fr;
            }
            .qt-footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .qt-nav-cta {
                padding: 8px 14px;
                font-size: 0.8rem;
            }
            .qt-page-hero {
                padding: 56px 0 44px;
            }
            .qt-page-hero h1 {
                font-size: 1.7rem;
            }
            .qt-img-card img {
                height: 190px;
            }
            .qt-feature-row .qt-feature-img img {
                height: 200px;
            }
        }

/* roulang page: category3 */
:root {
            --qt-primary: #00d68f;
            --qt-primary-dark: #00b377;
            --qt-primary-light: #33e6a8;
            --qt-secondary: #ff8c42;
            --qt-accent: #4dabf7;
            --qt-bg-dark: #0a0f1a;
            --qt-bg-card: #111827;
            --qt-bg-card-hover: #1a2332;
            --qt-bg-elevated: #162032;
            --qt-text-primary: #f1f5f9;
            --qt-text-secondary: #94a3b8;
            --qt-text-muted: #64748b;
            --qt-border: #1e293b;
            --qt-border-light: #2d3b4f;
            --qt-radius-sm: 8px;
            --qt-radius-md: 14px;
            --qt-radius-lg: 20px;
            --qt-radius-xl: 28px;
            --qt-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --qt-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
            --qt-shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.5);
            --qt-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --qt-font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --qt-section-spacing: 72px;
            --qt-nav-height: 68px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--qt-font-sans);
            background-color: var(--qt-bg-dark);
            color: var(--qt-text-primary);
            line-height: 1.7;
            overflow-x: hidden;
            font-size: 16px;
        }
        a {
            color: var(--qt-primary);
            text-decoration: none;
            transition: var(--qt-transition);
        }
        a:hover {
            color: var(--qt-primary-light);
            text-decoration: none;
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--qt-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .qt-container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 576px) {
            .qt-container {
                padding: 0 16px;
            }
        }
        /* ========== NAVBAR ========== */
        .qt-navbar {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(10, 15, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--qt-border);
            height: var(--qt-nav-height);
            display: flex;
            align-items: center;
            transition: var(--qt-transition);
        }
        .qt-navbar.scrolled {
            background: rgba(10, 15, 26, 0.98);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }
        .qt-navbar .qt-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .qt-nav-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--qt-text-primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .qt-nav-logo .qt-logo-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0a0f1a;
            font-size: 16px;
            font-weight: 900;
            flex-shrink: 0;
        }
        .qt-nav-logo:hover {
            color: var(--qt-text-primary);
        }
        .qt-nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
        }
        .qt-nav-links::-webkit-scrollbar {
            display: none;
        }
        .qt-nav-links li a {
            display: inline-block;
            padding: 8px 14px;
            color: var(--qt-text-secondary);
            font-size: 0.875rem;
            font-weight: 500;
            border-radius: 8px;
            white-space: nowrap;
            transition: var(--qt-transition);
            position: relative;
        }
        .qt-nav-links li a:hover {
            color: var(--qt-text-primary);
            background: var(--qt-bg-elevated);
        }
        .qt-nav-links li a.qt-active {
            color: var(--qt-primary);
            background: rgba(0, 214, 143, 0.12);
        }
        .qt-nav-links li a.qt-active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--qt-primary);
            border-radius: 2px;
        }
        .qt-nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .qt-nav-status {
            display: flex;
            align-items: center;
            gap: 6px;
            color: var(--qt-text-secondary);
            font-size: 0.75rem;
            padding: 6px 12px;
            background: var(--qt-bg-elevated);
            border-radius: 20px;
            border: 1px solid var(--qt-border);
            white-space: nowrap;
        }
        .qt-status-dot {
            width: 8px;
            height: 8px;
            background: var(--qt-primary);
            border-radius: 50%;
            animation: qtPulse 1.5s ease-in-out infinite;
        }
        @keyframes qtPulse {
            0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 214, 143, 0.4); }
            50% { opacity: 0.6; box-shadow: 0 0 0 6px rgba(0, 214, 143, 0); }
        }
        .qt-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            background: var(--qt-primary);
            color: #0a0f1a;
            border-radius: 8px;
            font-weight: 600;
            font-size: 0.875rem;
            border: none;
            cursor: pointer;
            white-space: nowrap;
            transition: var(--qt-transition);
        }
        .qt-nav-cta:hover {
            background: var(--qt-primary-light);
            color: #0a0f1a;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(0, 214, 143, 0.3);
        }
        .qt-nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--qt-border);
            color: var(--qt-text-primary);
            border-radius: 8px;
            width: 40px;
            height: 40px;
            cursor: pointer;
            font-size: 1.1rem;
            align-items: center;
            justify-content: center;
            transition: var(--qt-transition);
            flex-shrink: 0;
        }
        .qt-nav-toggle:hover {
            background: var(--qt-bg-elevated);
        }
        @media (max-width: 1024px) {
            .qt-nav-status {
                display: none;
            }
        }
        @media (max-width: 900px) {
            .qt-nav-links {
                position: absolute;
                top: var(--qt-nav-height);
                left: 0;
                right: 0;
                background: rgba(10, 15, 26, 0.98);
                backdrop-filter: blur(20px);
                border-bottom: 1px solid var(--qt-border);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px;
                gap: 8px;
                max-height: 0;
                overflow: hidden;
                transition: all 0.35s ease;
                box-shadow: 0 20px 40px rgba(0,0,0,0.5);
            }
            .qt-nav-links.open {
                max-height: 420px;
                padding: 16px 24px;
            }
            .qt-nav-links li a {
                display: block;
                padding: 12px 16px;
                font-size: 1rem;
            }
            .qt-nav-links li a.qt-active::after {
                display: none;
            }
            .qt-nav-cta {
                display: none;
            }
            .qt-nav-toggle {
                display: flex;
            }
        }
        /* ========== HERO ========== */
        .qt-hero {
            padding: 56px 0 40px;
            background: radial-gradient(ellipse at 20% 0%, rgba(0, 214, 143, 0.08) 0%, transparent 55%),
                        radial-gradient(ellipse at 80% 20%, rgba(77, 171, 247, 0.06) 0%, transparent 50%),
                        var(--qt-bg-dark);
            border-bottom: 1px solid var(--qt-border);
            position: relative;
            overflow: hidden;
        }
        .qt-hero::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 214, 143, 0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .qt-hero-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 214, 143, 0.1);
            color: var(--qt-primary);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            border: 1px solid rgba(0, 214, 143, 0.25);
            margin-bottom: 20px;
        }
        .qt-hero-title {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -1px;
            margin-bottom: 16px;
            color: var(--qt-text-primary);
        }
        .qt-hero-title em {
            font-style: normal;
            color: var(--qt-primary);
        }
        .qt-hero-sub {
            font-size: 1.1rem;
            color: var(--qt-text-secondary);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 32px;
        }
        .qt-hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-bottom: 32px;
        }
        .qt-hero-stat {
            display: flex;
            align-items: center;
            gap: 10px;
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 14px 20px;
        }
        .qt-hero-stat i {
            color: var(--qt-primary);
            font-size: 1.4rem;
            width: 26px;
            text-align: center;
        }
        .qt-hero-stat-value {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--qt-text-primary);
            line-height: 1.1;
        }
        .qt-hero-stat-label {
            font-size: 0.8rem;
            color: var(--qt-text-muted);
        }
        .qt-hero-icon-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 12px;
            margin-top: 8px;
        }
        .qt-hero-icon-item {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 20px 12px;
            text-align: center;
            transition: var(--qt-transition);
            cursor: default;
        }
        .qt-hero-icon-item:hover {
            background: var(--qt-bg-card-hover);
            border-color: rgba(0, 214, 143, 0.3);
            transform: translateY(-2px);
            box-shadow: var(--qt-shadow-sm);
        }
        .qt-hero-icon-item i {
            font-size: 1.8rem;
            color: var(--qt-primary);
            margin-bottom: 10px;
        }
        .qt-hero-icon-item span {
            font-size: 0.8rem;
            color: var(--qt-text-secondary);
            font-weight: 500;
        }
        @media (max-width: 992px) {
            .qt-hero-title { font-size: 2.2rem; }
            .qt-hero-icon-grid { grid-template-columns: repeat(3, 1fr); }
        }
        @media (max-width: 576px) {
            .qt-hero-title { font-size: 1.7rem; }
            .qt-hero-sub { font-size: 0.95rem; }
            .qt-hero-icon-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
            .qt-hero-stats { gap: 12px; }
        }
        /* ========== SECTION BASE ========== */
        .qt-section {
            padding: var(--qt-section-spacing) 0;
        }
        .qt-section-header {
            margin-bottom: 40px;
        }
        .qt-section-label {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 1px;
            text-transform: uppercase;
            color: var(--qt-primary);
            margin-bottom: 10px;
        }
        .qt-section-title {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            color: var(--qt-text-primary);
            margin: 0;
        }
        .qt-section-desc {
            font-size: 1rem;
            color: var(--qt-text-secondary);
            max-width: 640px;
            line-height: 1.8;
            margin-top: 12px;
        }
        @media (max-width: 768px) {
            .qt-section { padding: 48px 0; }
            .qt-section-title { font-size: 1.5rem; }
        }
        /* ========== CARDS ========== */
        .qt-card {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-lg);
            padding: 24px;
            transition: var(--qt-transition);
            height: 100%;
        }
        .qt-card:hover {
            background: var(--qt-bg-card-hover);
            border-color: var(--qt-border-light);
            box-shadow: var(--qt-shadow-md);
            transform: translateY(-2px);
        }
        .qt-card-icon {
            width: 44px;
            height: 44px;
            background: rgba(0, 214, 143, 0.1);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--qt-primary);
            font-size: 1.3rem;
            margin-bottom: 16px;
        }
        .qt-card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 8px;
        }
        .qt-card-text {
            font-size: 0.9rem;
            color: var(--qt-text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .qt-card-badge {
            display: inline-block;
            background: rgba(77, 171, 247, 0.1);
            color: var(--qt-accent);
            padding: 3px 10px;
            border-radius: 12px;
            font-size: 0.7rem;
            font-weight: 600;
            margin-bottom: 12px;
        }
        /* ========== BUTTONS ========== */
        .qt-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: var(--qt-transition);
            text-decoration: none;
        }
        .qt-btn-primary {
            background: var(--qt-primary);
            color: #0a0f1a;
        }
        .qt-btn-primary:hover {
            background: var(--qt-primary-light);
            color: #0a0f1a;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(0, 214, 143, 0.3);
        }
        .qt-btn-outline {
            background: transparent;
            color: var(--qt-primary);
            border: 1px solid var(--qt-primary);
        }
        .qt-btn-outline:hover {
            background: rgba(0, 214, 143, 0.1);
            color: var(--qt-primary-light);
            border-color: var(--qt-primary-light);
        }
        .qt-btn-lg {
            padding: 14px 36px;
            font-size: 1.05rem;
        }
        /* ========== FEATURE GRID ========== */
        .qt-feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        @media (max-width: 992px) {
            .qt-feature-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 576px) {
            .qt-feature-grid { grid-template-columns: 1fr; }
        }
        /* ========== SCENARIO BLOCK ========== */
        .qt-scenario-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .qt-scenario-content h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 16px;
        }
        .qt-scenario-content p {
            color: var(--qt-text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .qt-scenario-list {
            list-style: none;
            padding: 0;
            margin: 0 0 20px;
        }
        .qt-scenario-list li {
            padding: 10px 0;
            color: var(--qt-text-secondary);
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.95rem;
        }
        .qt-scenario-list li i {
            color: var(--qt-primary);
            margin-top: 4px;
            flex-shrink: 0;
        }
        .qt-scenario-image {
            border-radius: var(--qt-radius-lg);
            overflow: hidden;
            box-shadow: var(--qt-shadow-lg);
        }
        .qt-scenario-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        @media (max-width: 768px) {
            .qt-scenario-block { grid-template-columns: 1fr; gap: 24px; }
        }
        /* ========== CASE / EVIDENCE ========== */
        .qt-case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .qt-case-card {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-lg);
            padding: 28px;
            transition: var(--qt-transition);
        }
        .qt-case-card:hover {
            background: var(--qt-bg-card-hover);
            border-color: var(--qt-border-light);
        }
        .qt-case-quote {
            font-size: 1rem;
            color: var(--qt-text-primary);
            line-height: 1.8;
            margin-bottom: 16px;
            font-style: italic;
        }
        .qt-case-meta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .qt-case-avatar {
            width: 42px;
            height: 42px;
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-accent));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0a0f1a;
            font-weight: 700;
        }
        .qt-case-name {
            font-weight: 600;
            color: var(--qt-text-primary);
            font-size: 0.9rem;
        }
        .qt-case-role {
            font-size: 0.8rem;
            color: var(--qt-text-muted);
        }
        @media (max-width: 768px) {
            .qt-case-grid { grid-template-columns: 1fr; }
        }
        /* ========== PROCESS ========== */
        .qt-process-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .qt-process-step {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-lg);
            padding: 24px;
            position: relative;
            transition: var(--qt-transition);
        }
        .qt-process-step:hover {
            background: var(--qt-bg-card-hover);
            border-color: var(--qt-border-light);
        }
        .qt-step-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--qt-primary);
            opacity: 0.35;
            line-height: 1;
            margin-bottom: 12px;
        }
        .qt-step-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--qt-text-primary);
            margin-bottom: 8px;
        }
        .qt-step-text {
            font-size: 0.85rem;
            color: var(--qt-text-secondary);
            line-height: 1.6;
        }
        @media (max-width: 992px) {
            .qt-process-list { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 576px) {
            .qt-process-list { grid-template-columns: 1fr; }
        }
        /* ========== FAQ ========== */
        .qt-faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .qt-accordion-item {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--qt-transition);
        }
        .qt-accordion-item:hover {
            border-color: var(--qt-border-light);
        }
        .qt-accordion-btn {
            width: 100%;
            background: transparent;
            border: none;
            color: var(--qt-text-primary);
            font-weight: 600;
            font-size: 1rem;
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            transition: var(--qt-transition);
            text-align: left;
            gap: 16px;
        }
        .qt-accordion-btn:hover {
            color: var(--qt-primary);
        }
        .qt-accordion-btn i {
            transition: var(--qt-transition);
            color: var(--qt-text-muted);
            flex-shrink: 0;
        }
        .qt-accordion-btn.open i {
            transform: rotate(180deg);
            color: var(--qt-primary);
        }
        .qt-accordion-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .qt-accordion-body-inner {
            padding: 0 24px 20px;
            color: var(--qt-text-secondary);
            font-size: 0.9rem;
            line-height: 1.8;
        }
        /* ========== CTA ========== */
        .qt-cta-section {
            padding: 56px 0;
            background: radial-gradient(ellipse at center, rgba(0, 214, 143, 0.08) 0%, transparent 60%),
                        var(--qt-bg-dark);
            border-top: 1px solid var(--qt-border);
            border-bottom: 1px solid var(--qt-border);
        }
        .qt-cta-box {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border-light);
            border-radius: var(--qt-radius-xl);
            padding: 48px 40px;
            text-align: center;
            box-shadow: var(--qt-shadow-lg);
        }
        .qt-cta-title {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--qt-text-primary);
            margin-bottom: 12px;
        }
        .qt-cta-text {
            color: var(--qt-text-secondary);
            max-width: 560px;
            margin: 0 auto 24px;
            line-height: 1.8;
        }
        @media (max-width: 576px) {
            .qt-cta-box { padding: 32px 20px; }
            .qt-cta-title { font-size: 1.4rem; }
        }
        /* ========== FOOTER ========== */
        .qt-footer {
            background: #080c14;
            border-top: 1px solid var(--qt-border);
            padding: 56px 0 28px;
        }
        .qt-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }
        .qt-footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--qt-text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }
        .qt-footer p {
            color: var(--qt-text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .qt-footer h5 {
            color: var(--qt-text-primary);
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .qt-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .qt-footer ul li {
            margin-bottom: 8px;
        }
        .qt-footer ul li a {
            color: var(--qt-text-secondary);
            font-size: 0.85rem;
            transition: var(--qt-transition);
        }
        .qt-footer ul li a:hover {
            color: var(--qt-primary);
        }
        .qt-footer-bottom {
            border-top: 1px solid var(--qt-border);
            padding-top: 20px;
            text-align: center;
        }
        .qt-footer-bottom p {
            color: var(--qt-text-muted);
            font-size: 0.8rem;
            margin-bottom: 6px;
        }
        .qt-footer-bottom a {
            color: var(--qt-text-muted);
            font-size: 0.8rem;
        }
        .qt-footer-bottom a:hover {
            color: var(--qt-primary);
        }
        @media (max-width: 992px) {
            .qt-footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 576px) {
            .qt-footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .qt-footer { padding: 40px 0 20px; }
        }

/* roulang page: category5 */
:root {
  --qt-primary: #00d68f;
  --qt-primary-dark: #00b377;
  --qt-primary-light: #33e6a8;
  --qt-secondary: #ff8c42;
  --qt-accent: #4dabf7;
  --qt-bg-dark: #0a0f1a;
  --qt-bg-card: #111827;
  --qt-bg-card-hover: #1a2332;
  --qt-bg-elevated: #162032;
  --qt-text-primary: #f1f5f9;
  --qt-text-secondary: #94a3b8;
  --qt-text-muted: #64748b;
  --qt-border: #1e293b;
  --qt-border-light: #2d3b4f;
  --qt-radius-sm: 8px;
  --qt-radius-md: 14px;
  --qt-radius-lg: 20px;
  --qt-radius-xl: 28px;
  --qt-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --qt-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --qt-shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.5);
  --qt-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --qt-font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --qt-section-spacing: 64px;
  --qt-nav-height: 68px;
}
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body {
  font-family: var(--qt-font-sans);
  background-color: var(--qt-bg-dark);
  color: var(--qt-text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  font-size: 16px;
}
a {
  color: var(--qt-primary);
  text-decoration: none;
  transition: var(--qt-transition);
}
a:hover {
  color: var(--qt-primary-light);
  text-decoration: none;
}
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--qt-primary);
  outline-offset: 2px;
  border-radius: 4px;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
.qt-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
/* ========== NAVBAR ========== */
.qt-navbar {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: rgba(10, 15, 26, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--qt-border);
  height: var(--qt-nav-height);
  display: flex;
  align-items: center;
  transition: var(--qt-transition);
}
.qt-navbar.scrolled {
  background: rgba(10, 15, 26, 0.98);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}
.qt-navbar .qt-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.qt-nav-logo {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--qt-text-primary);
  letter-spacing: -0.5px;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}
.qt-nav-logo .qt-logo-icon {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0a0f1a;
  font-size: 16px;
  font-weight: 900;
  flex-shrink: 0;
}
.qt-nav-logo:hover {
  color: var(--qt-text-primary);
}
.qt-nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}
.qt-nav-links::-webkit-scrollbar {
  display: none;
}
.qt-nav-links li a {
  display: inline-block;
  padding: 8px 14px;
  color: var(--qt-text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 8px;
  white-space: nowrap;
  transition: var(--qt-transition);
  position: relative;
}
.qt-nav-links li a:hover {
  color: var(--qt-text-primary);
  background: var(--qt-bg-elevated);
}
.qt-nav-links li a.qt-active {
  color: var(--qt-primary);
  background: rgba(0, 214, 143, 0.12);
}
.qt-nav-links li a.qt-active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--qt-primary);
  border-radius: 2px;
}
.qt-nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.qt-nav-status {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--qt-text-secondary);
  font-size: 0.75rem;
  padding: 6px 12px;
  background: var(--qt-bg-elevated);
  border-radius: 20px;
  border: 1px solid var(--qt-border);
  white-space: nowrap;
}
.qt-status-dot {
  width: 8px;
  height: 8px;
  background: var(--qt-primary);
  border-radius: 50%;
  animation: qt-pulse 2s infinite;
}
@keyframes qt-pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 214, 143, 0.5); }
  50% { opacity: 0.6; box-shadow: 0 0 0 6px rgba(0, 214, 143, 0); }
}
.qt-nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
  color: #0a0f1a;
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: 8px;
  white-space: nowrap;
  transition: var(--qt-transition);
}
.qt-nav-cta:hover {
  color: #0a0f1a;
  box-shadow: 0 8px 20px rgba(0, 214, 143, 0.35);
  transform: translateY(-1px);
}
.qt-nav-toggle {
  display: none;
  background: var(--qt-bg-elevated);
  border: 1px solid var(--qt-border);
  color: var(--qt-text-primary);
  width: 40px;
  height: 40px;
  border-radius: 8px;
  font-size: 1rem;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--qt-transition);
}
.qt-nav-toggle:hover {
  background: var(--qt-bg-card-hover);
}
/* ========== HERO ========== */
.qt-hero {
  position: relative;
  padding: 56px 0 48px;
  background: linear-gradient(180deg, #0a0f1a 0%, #0d1526 40%, #0a0f1a 100%);
  border-bottom: 1px solid var(--qt-border);
  overflow: hidden;
}
.qt-hero::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -80px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(0, 214, 143, 0.22) 0%, transparent 65%);
  border-radius: 50%;
  pointer-events: none;
}
.qt-hero::after {
  content: '';
  position: absolute;
  bottom: -160px;
  left: -100px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(77, 171, 247, 0.1) 0%, transparent 65%);
  border-radius: 50%;
  pointer-events: none;
}
.qt-hero .qt-container {
  position: relative;
  z-index: 1;
}
.qt-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(0, 214, 143, 0.1);
  border: 1px solid rgba(0, 214, 143, 0.3);
  border-radius: 30px;
  color: var(--qt-primary);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.qt-hero h1 {
  font-size: 2.75rem;
  font-weight: 800;
  letter-spacing: -1.2px;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--qt-text-primary);
}
.qt-hero h1 .qt-hero-accent {
  color: var(--qt-primary);
  position: relative;
}
.qt-hero-subtitle {
  font-size: 1.1rem;
  color: var(--qt-text-secondary);
  max-width: 640px;
  margin-bottom: 28px;
  line-height: 1.65;
}
.qt-hero-search {
  max-width: 560px;
  margin-bottom: 24px;
}
.qt-hero-search .input-group {
  background: var(--qt-bg-card);
  border: 1px solid var(--qt-border-light);
  border-radius: var(--qt-radius-md);
  overflow: hidden;
  box-shadow: var(--qt-shadow-md);
}
.qt-hero-search input {
  background: var(--qt-bg-card);
  border: none;
  color: var(--qt-text-primary);
  padding: 14px 20px;
  font-size: 0.95rem;
  min-height: 48px;
}
.qt-hero-search input::placeholder {
  color: var(--qt-text-muted);
}
.qt-hero-search input:focus {
  background: var(--qt-bg-card);
  color: var(--qt-text-primary);
  border: none;
  box-shadow: none;
}
.qt-hero-search button {
  background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
  border: none;
  color: #0a0f1a;
  font-weight: 700;
  padding: 0 24px;
  min-height: 48px;
  transition: var(--qt-transition);
}
.qt-hero-search button:hover {
  background: var(--qt-primary-light);
  color: #0a0f1a;
}
.qt-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.qt-hero-tags-label {
  font-size: 0.8rem;
  color: var(--qt-text-muted);
  margin-right: 4px;
}
.qt-hero-tags a {
  display: inline-block;
  padding: 5px 14px;
  background: var(--qt-bg-card);
  border: 1px solid var(--qt-border);
  border-radius: 20px;
  color: var(--qt-text-secondary);
  font-size: 0.78rem;
  font-weight: 500;
  transition: var(--qt-transition);
}
.qt-hero-tags a:hover {
  color: var(--qt-primary);
  border-color: var(--qt-primary);
  background: rgba(0, 214, 143, 0.08);
}
/* ========== SECTION ========== */
.qt-section {
  padding: var(--qt-section-spacing) 0;
  position: relative;
}
.qt-section-alt {
  background: var(--qt-bg-card);
  border-top: 1px solid var(--qt-border);
  border-bottom: 1px solid var(--qt-border);
}
.qt-section-header {
  margin-bottom: 36px;
}
.qt-section-header h2 {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.6px;
  margin-bottom: 8px;
  color: var(--qt-text-primary);
}
.qt-section-header p {
  color: var(--qt-text-secondary);
  max-width: 720px;
  font-size: 0.98rem;
  margin-bottom: 0;
}
.qt-section-header .qt-badge-line {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(0, 214, 143, 0.08);
  border: 1px solid rgba(0, 214, 143, 0.25);
  border-radius: 20px;
  color: var(--qt-primary);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
  text-transform: uppercase;
}
/* ========== CARDS ========== */
.qt-card {
  background: var(--qt-bg-card);
  border: 1px solid var(--qt-border);
  border-radius: var(--qt-radius-md);
  padding: 24px;
  transition: var(--qt-transition);
  height: 100%;
}
.qt-card:hover {
  background: var(--qt-bg-card-hover);
  box-shadow: var(--qt-shadow-md);
  transform: translateY(-4px);
  border-color: rgba(0, 214, 143, 0.3);
}
.qt-card-icon {
  width: 48px;
  height: 48px;
  background: rgba(0, 214, 143, 0.12);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--qt-primary);
  font-size: 20px;
  margin-bottom: 16px;
}
.qt-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--qt-text-primary);
}
.qt-card p {
  color: var(--qt-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 0;
  line-height: 1.65;
}
/* ========== BUTTONS ========== */
.qt-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.9rem;
  transition: var(--qt-transition);
  border: none;
  cursor: pointer;
}
.qt-btn-primary {
  background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
  color: #0a0f1a;
}
.qt-btn-primary:hover {
  background: var(--qt-primary-light);
  color: #0a0f1a;
  box-shadow: 0 8px 24px rgba(0, 214, 143, 0.35);
  transform: translateY(-2px);
}
.qt-btn-outline {
  background: transparent;
  color: var(--qt-primary);
  border: 1px solid var(--qt-primary);
}
.qt-btn-outline:hover {
  background: rgba(0, 214, 143, 0.1);
  color: var(--qt-primary-light);
  border-color: var(--qt-primary-light);
  transform: translateY(-2px);
}
.qt-btn-lg {
  padding: 14px 36px;
  font-size: 1rem;
}
/* ========== BADGES ========== */
.qt-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 16px;
  font-size: 0.72rem;
  font-weight: 600;
}
.qt-badge-success {
  background: rgba(0, 214, 143, 0.12);
  color: var(--qt-primary);
  border: 1px solid rgba(0, 214, 143, 0.25);
}
.qt-badge-warning {
  background: rgba(255, 140, 66, 0.12);
  color: var(--qt-secondary);
  border: 1px solid rgba(255, 140, 66, 0.3);
}
.qt-badge-info {
  background: rgba(77, 171, 247, 0.12);
  color: var(--qt-accent);
  border: 1px solid rgba(77, 171, 247, 0.3);
}
/* ========== DATA RANKING ========== */
.qt-ranking-table {
  background: var(--qt-bg-card);
  border: 1px solid var(--qt-border);
  border-radius: var(--qt-radius-lg);
  overflow: hidden;
}
.qt-ranking-table .table {
  margin-bottom: 0;
  color: var(--qt-text-primary);
}
.qt-ranking-table .table thead th {
  background: var(--qt-bg-elevated);
  border-bottom: 1px solid var(--qt-border-light);
  color: var(--qt-text-secondary);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 14px 20px;
  letter-spacing: 0.3px;
}
.qt-ranking-table .table tbody td {
  border-bottom: 1px solid var(--qt-border);
  padding: 14px 20px;
  font-size: 0.88rem;
  vertical-align: middle;
}
.qt-ranking-table .table tbody tr:hover {
  background: var(--qt-bg-card-hover);
}
.qt-ranking-table .table tbody tr:last-child td {
  border-bottom: none;
}
/* ========== FAQ ========== */
.qt-faq-item {
  background: var(--qt-bg-card);
  border: 1px solid var(--qt-border);
  border-radius: var(--qt-radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
  transition: var(--qt-transition);
}
.qt-faq-item:hover {
  border-color: var(--qt-border-light);
}
.qt-faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--qt-text-primary);
  gap: 12px;
  transition: var(--qt-transition);
  user-select: none;
}
.qt-faq-question:hover {
  color: var(--qt-primary);
}
.qt-faq-question i {
  color: var(--qt-text-muted);
  font-size: 0.8rem;
  transition: var(--qt-transition);
  flex-shrink: 0;
}
.qt-faq-question.open i {
  transform: rotate(180deg);
  color: var(--qt-primary);
}
.qt-faq-answer {
  padding: 0 22px 18px;
  color: var(--qt-text-secondary);
  font-size: 0.88rem;
  line-height: 1.7;
  display: none;
}
.qt-faq-answer.show {
  display: block;
}
/* ========== CTA ========== */
.qt-cta-box {
  background: linear-gradient(135deg, var(--qt-bg-elevated), var(--qt-bg-card));
  border: 1px solid var(--qt-border-light);
  border-radius: var(--qt-radius-xl);
  padding: 48px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.qt-cta-box::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -40px;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(0, 214, 143, 0.2) 0%, transparent 65%);
  border-radius: 50%;
}
.qt-cta-box h2 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--qt-text-primary);
  position: relative;
}
.qt-cta-box p {
  color: var(--qt-text-secondary);
  max-width: 560px;
  margin: 0 auto 24px;
  position: relative;
}
/* ========== FOOTER ========== */
.qt-footer {
  background: #070b14;
  border-top: 1px solid var(--qt-border);
  padding: 48px 0 24px;
}
.qt-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}
.qt-footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--qt-text-primary);
  margin-bottom: 12px;
}
.qt-footer-brand .qt-logo-icon {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0a0f1a;
  font-size: 13px;
}
.qt-footer p {
  color: var(--qt-text-muted);
  font-size: 0.85rem;
  line-height: 1.7;
  margin-bottom: 0;
}
.qt-footer h5 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--qt-text-primary);
  margin-bottom: 14px;
}
.qt-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.qt-footer ul li {
  margin-bottom: 8px;
}
.qt-footer ul li a {
  color: var(--qt-text-muted);
  font-size: 0.82rem;
  transition: var(--qt-transition);
}
.qt-footer ul li a:hover {
  color: var(--qt-primary);
}
.qt-footer-bottom {
  border-top: 1px solid var(--qt-border);
  padding-top: 18px;
}
.qt-footer-bottom p {
  font-size: 0.75rem;
  color: var(--qt-text-muted);
  margin-bottom: 6px;
}
.qt-footer-bottom a {
  color: var(--qt-text-muted);
}
.qt-footer-bottom a:hover {
  color: var(--qt-primary);
}
/* ========== RESPONSIVE ========== */
@media (max-width: 1024px) {
  .qt-nav-status {
    display: none;
  }
  .qt-hero h1 {
    font-size: 2.3rem;
  }
  .qt-footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
}
@media (max-width: 768px) {
  :root {
    --qt-section-spacing: 48px;
  }
  .qt-nav-links {
    display: none;
    position: absolute;
    top: var(--qt-nav-height);
    left: 0;
    right: 0;
    background: rgba(10, 15, 26, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--qt-border);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 16px;
    box-shadow: var(--qt-shadow-lg);
  }
  .qt-nav-links.show {
    display: flex;
  }
  .qt-nav-links li a {
    padding: 12px 16px;
    font-size: 0.95rem;
    border-radius: 8px;
  }
  .qt-nav-links li a.qt-active::after {
    display: none;
  }
  .qt-nav-cta {
    display: none;
  }
  .qt-nav-toggle {
    display: flex;
  }
  .qt-hero {
    padding: 40px 0 36px;
  }
  .qt-hero h1 {
    font-size: 1.85rem;
  }
  .qt-hero-subtitle {
    font-size: 0.95rem;
  }
  .qt-section-header h2 {
    font-size: 1.5rem;
  }
  .qt-footer-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .qt-cta-box {
    padding: 32px 20px;
  }
  .qt-ranking-table .table thead th,
  .qt-ranking-table .table tbody td {
    padding: 10px 14px;
    font-size: 0.8rem;
  }
}
@media (max-width: 520px) {
  .qt-container {
    padding: 0 12px;
  }
  .qt-hero h1 {
    font-size: 1.6rem;
  }
  .qt-hero-search .input-group {
    flex-direction: column;
    border-radius: 10px;
  }
  .qt-hero-search input {
    border-radius: 10px 10px 0 0 !important;
  }
  .qt-hero-search button {
    border-radius: 0 0 10px 10px !important;
    width: 100%;
  }
  .qt-btn {
    width: 100%;
    justify-content: center;
  }
  .qt-card {
    padding: 18px;
  }
}

/* roulang page: category6 */
:root {
            --qt-primary: #00d68f;
            --qt-primary-dark: #00b377;
            --qt-primary-light: #33e6a8;
            --qt-secondary: #ff8c42;
            --qt-accent: #4dabf7;
            --qt-bg-dark: #0a0f1a;
            --qt-bg-card: #111827;
            --qt-bg-card-hover: #1a2332;
            --qt-bg-elevated: #162032;
            --qt-text-primary: #f1f5f9;
            --qt-text-secondary: #94a3b8;
            --qt-text-muted: #64748b;
            --qt-border: #1e293b;
            --qt-border-light: #2d3b4f;
            --qt-radius-sm: 8px;
            --qt-radius-md: 14px;
            --qt-radius-lg: 20px;
            --qt-radius-xl: 28px;
            --qt-shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --qt-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
            --qt-shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.5);
            --qt-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --qt-font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --qt-section-spacing: 72px;
            --qt-nav-height: 68px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--qt-font-sans);
            background-color: var(--qt-bg-dark);
            color: var(--qt-text-primary);
            line-height: 1.7;
            overflow-x: hidden;
            font-size: 16px;
        }
        a {
            color: var(--qt-primary);
            text-decoration: none;
            transition: var(--qt-transition);
        }
        a:hover {
            color: var(--qt-primary-light);
            text-decoration: none;
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--qt-primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .qt-container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .qt-container {
                padding: 0 16px;
            }
        }
        /* ========== NAVBAR ========== */
        .qt-navbar {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(10, 15, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--qt-border);
            height: var(--qt-nav-height);
            display: flex;
            align-items: center;
            transition: var(--qt-transition);
        }
        .qt-navbar.scrolled {
            background: rgba(10, 15, 26, 0.98);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
        }
        .qt-navbar .qt-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .qt-nav-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--qt-text-primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .qt-nav-logo .qt-logo-icon {
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0a0f1a;
            font-size: 16px;
            font-weight: 900;
            flex-shrink: 0;
        }
        .qt-nav-logo:hover {
            color: var(--qt-text-primary);
        }
        .qt-nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
        }
        .qt-nav-links::-webkit-scrollbar {
            display: none;
        }
        .qt-nav-links li a {
            display: inline-block;
            padding: 8px 14px;
            color: var(--qt-text-secondary);
            font-size: 0.875rem;
            font-weight: 500;
            border-radius: 8px;
            white-space: nowrap;
            transition: var(--qt-transition);
            position: relative;
        }
        .qt-nav-links li a:hover {
            color: var(--qt-text-primary);
            background: var(--qt-bg-elevated);
        }
        .qt-nav-links li a.qt-active {
            color: var(--qt-primary);
            background: rgba(0, 214, 143, 0.12);
        }
        .qt-nav-links li a.qt-active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--qt-primary);
            border-radius: 2px;
        }
        .qt-nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .qt-nav-status {
            display: flex;
            align-items: center;
            gap: 6px;
            color: var(--qt-text-secondary);
            font-size: 0.75rem;
            padding: 6px 12px;
            background: var(--qt-bg-elevated);
            border-radius: 20px;
            border: 1px solid var(--qt-border);
        }
        .qt-status-dot {
            width: 8px;
            height: 8px;
            background: var(--qt-primary);
            border-radius: 50%;
            animation: qtPulse 2s infinite;
        }
        @keyframes qtPulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }
        .qt-nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            background: var(--qt-primary);
            color: #0a0f1a;
            font-weight: 700;
            font-size: 0.85rem;
            border-radius: 8px;
            white-space: nowrap;
            transition: var(--qt-transition);
        }
        .qt-nav-cta:hover {
            background: var(--qt-primary-light);
            color: #0a0f1a;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(0, 214, 143, 0.35);
        }
        .qt-nav-toggle {
            display: none;
            background: var(--qt-bg-elevated);
            border: 1px solid var(--qt-border);
            color: var(--qt-text-primary);
            width: 40px;
            height: 40px;
            border-radius: 8px;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--qt-transition);
        }
        .qt-nav-toggle:hover {
            background: var(--qt-bg-card-hover);
        }
        @media (max-width: 992px) {
            .qt-nav-links {
                position: absolute;
                top: var(--qt-nav-height);
                left: 0;
                right: 0;
                background: rgba(10, 15, 26, 0.98);
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--qt-border);
                display: none;
                max-height: calc(100vh - var(--qt-nav-height));
                overflow-y: auto;
            }
            .qt-nav-links.show {
                display: flex;
            }
            .qt-nav-links li {
                width: 100%;
            }
            .qt-nav-links li a {
                display: block;
                padding: 12px 16px;
                font-size: 1rem;
            }
            .qt-nav-actions {
                margin-left: auto;
            }
            .qt-nav-status {
                display: none;
            }
            .qt-nav-toggle {
                display: flex;
            }
        }
        @media (max-width: 576px) {
            .qt-nav-cta {
                display: none;
            }
        }
        /* ========== PAGE HERO ========== */
        .qt-page-hero {
            position: relative;
            min-height: 480px;
            display: flex;
            align-items: center;
            padding: 80px 0 60px;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .qt-page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 15, 26, 0.92) 20%, rgba(10, 15, 26, 0.7) 70%, rgba(10, 15, 26, 0.5) 100%);
        }
        .qt-page-hero .qt-container {
            position: relative;
            z-index: 1;
        }
        .qt-page-hero .badge-qt {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 214, 143, 0.15);
            color: var(--qt-primary);
            border: 1px solid rgba(0, 214, 143, 0.3);
            border-radius: 20px;
            padding: 6px 16px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 20px;
        }
        .qt-page-hero h1 {
            font-size: clamp(2.2rem, 5vw, 3.8rem);
            font-weight: 800;
            letter-spacing: -1px;
            line-height: 1.15;
            margin-bottom: 20px;
            max-width: 750px;
        }
        .qt-page-hero .lead {
            font-size: 1.15rem;
            color: var(--qt-text-secondary);
            max-width: 620px;
            margin-bottom: 28px;
        }
        .qt-hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .qt-btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--qt-primary);
            color: #0a0f1a;
            font-weight: 700;
            font-size: 0.95rem;
            border: 2px solid var(--qt-primary);
            border-radius: 10px;
            cursor: pointer;
            transition: var(--qt-transition);
        }
        .qt-btn-primary:hover {
            background: var(--qt-primary-light);
            border-color: var(--qt-primary-light);
            color: #0a0f1a;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 214, 143, 0.4);
        }
        .qt-btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: transparent;
            color: var(--qt-text-primary);
            font-weight: 600;
            font-size: 0.95rem;
            border: 2px solid var(--qt-border-light);
            border-radius: 10px;
            cursor: pointer;
            transition: var(--qt-transition);
        }
        .qt-btn-outline:hover {
            border-color: var(--qt-primary);
            color: var(--qt-primary);
            background: rgba(0, 214, 143, 0.08);
        }
        .qt-hero-stats {
            display: flex;
            gap: 32px;
            margin-top: 40px;
            flex-wrap: wrap;
        }
        .qt-hero-stat {
            text-align: left;
        }
        .qt-hero-stat .num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--qt-primary);
        }
        .qt-hero-stat .label {
            font-size: 0.85rem;
            color: var(--qt-text-muted);
        }
        /* ========== SECTIONS ========== */
        .qt-section {
            padding: var(--qt-section-spacing) 0;
        }
        .qt-section-slim {
            padding: 48px 0;
        }
        .qt-section-dark {
            background: var(--qt-bg-card);
            border-top: 1px solid var(--qt-border);
            border-bottom: 1px solid var(--qt-border);
        }
        .qt-section-header {
            margin-bottom: 44px;
        }
        .qt-section-header h2 {
            font-size: clamp(1.8rem, 3.5vw, 2.6rem);
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }
        .qt-section-header p {
            color: var(--qt-text-secondary);
            font-size: 1.05rem;
            max-width: 650px;
        }
        .qt-section-header.centered {
            text-align: center;
        }
        .qt-section-header.centered p {
            margin: 0 auto;
        }
        /* ========== CARDS ========== */
        .qt-card {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            overflow: hidden;
            transition: var(--qt-transition);
            height: 100%;
        }
        .qt-card:hover {
            background: var(--qt-bg-card-hover);
            border-color: var(--qt-border-light);
            transform: translateY(-4px);
            box-shadow: var(--qt-shadow-md);
        }
        .qt-card .qt-card-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .qt-card .qt-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .qt-card:hover .qt-card-img img {
            transform: scale(1.05);
        }
        .qt-card .qt-card-body {
            padding: 24px;
        }
        .qt-card .qt-card-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--qt-text-primary);
        }
        .qt-card .qt-card-body p {
            color: var(--qt-text-secondary);
            font-size: 0.92rem;
            margin-bottom: 0;
        }
        .qt-card .qt-card-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(0, 214, 143, 0.12);
            color: var(--qt-primary);
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 20px;
            margin-bottom: 12px;
        }
        .qt-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            transition: var(--qt-transition);
        }
        .qt-tag-green {
            background: rgba(0, 214, 143, 0.12);
            color: var(--qt-primary);
            border: 1px solid rgba(0, 214, 143, 0.25);
        }
        .qt-tag-orange {
            background: rgba(255, 140, 66, 0.12);
            color: var(--qt-secondary);
            border: 1px solid rgba(255, 140, 66, 0.25);
        }
        .qt-tag-blue {
            background: rgba(77, 171, 247, 0.12);
            color: var(--qt-accent);
            border: 1px solid rgba(77, 171, 247, 0.25);
        }
        /* ========== LIST ITEMS ========== */
        .qt-list-item {
            display: flex;
            gap: 14px;
            padding: 16px 0;
            border-bottom: 1px solid var(--qt-border);
            align-items: flex-start;
        }
        .qt-list-item:last-child {
            border-bottom: none;
        }
        .qt-list-icon {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            background: rgba(0, 214, 143, 0.1);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--qt-primary);
            font-size: 1rem;
        }
        .qt-list-content h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .qt-list-content p {
            font-size: 0.9rem;
            color: var(--qt-text-secondary);
            margin-bottom: 0;
        }
        /* ========== FAQ ========== */
        .qt-faq-item {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--qt-transition);
        }
        .qt-faq-item:hover {
            border-color: var(--qt-border-light);
        }
        .qt-faq-item .qt-faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--qt-text-primary);
            user-select: none;
            gap: 12px;
        }
        .qt-faq-item .qt-faq-question .qt-faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(0, 214, 143, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--qt-primary);
            font-size: 0.75rem;
            transition: transform 0.3s ease;
        }
        .qt-faq-item.open .qt-faq-icon {
            transform: rotate(180deg);
        }
        .qt-faq-item .qt-faq-answer {
            padding: 0 24px 20px;
            color: var(--qt-text-secondary);
            font-size: 0.92rem;
            display: none;
        }
        .qt-faq-item.open .qt-faq-answer {
            display: block;
        }
        /* ========== CTA ========== */
        .qt-cta-section {
            background: linear-gradient(135deg, var(--qt-bg-elevated) 0%, var(--qt-bg-card) 100%);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-xl);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .qt-cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 214, 143, 0.1) 0%, transparent 70%);
            border-radius: 50%;
        }
        .qt-cta-section h2 {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            font-weight: 800;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }
        .qt-cta-section p {
            color: var(--qt-text-secondary);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
        }
        /* ========== FOOTER ========== */
        .qt-footer {
            background: #070b12;
            border-top: 1px solid var(--qt-border);
            padding: 56px 0 28px;
            margin-top: var(--qt-section-spacing);
        }
        .qt-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .qt-footer-grid > div > p {
            color: var(--qt-text-secondary);
            font-size: 0.9rem;
            margin-top: 14px;
            max-width: 300px;
        }
        .qt-footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1.2rem;
            font-weight: 800;
            color: var(--qt-text-primary);
        }
        .qt-footer h5 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--qt-text-primary);
        }
        .qt-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .qt-footer ul li {
            margin-bottom: 8px;
        }
        .qt-footer ul li a {
            color: var(--qt-text-secondary);
            font-size: 0.88rem;
            transition: var(--qt-transition);
        }
        .qt-footer ul li a:hover {
            color: var(--qt-primary);
        }
        .qt-footer-bottom {
            border-top: 1px solid var(--qt-border);
            padding-top: 20px;
            text-align: center;
            color: var(--qt-text-muted);
            font-size: 0.82rem;
        }
        .qt-footer-bottom a {
            color: var(--qt-text-muted);
        }
        .qt-footer-bottom a:hover {
            color: var(--qt-primary);
        }
        @media (max-width: 992px) {
            .qt-footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 576px) {
            .qt-footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .qt-cta-section {
                padding: 40px 24px;
            }
            .qt-hero-stats {
                gap: 20px;
            }
        }
        /* ========== COMPARISON TABLE ========== */
        .qt-compare-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            background: var(--qt-bg-card);
            border-radius: var(--qt-radius-md);
            overflow: hidden;
            border: 1px solid var(--qt-border);
        }
        .qt-compare-table th,
        .qt-compare-table td {
            padding: 16px 20px;
            text-align: left;
            border-bottom: 1px solid var(--qt-border);
        }
        .qt-compare-table th {
            background: var(--qt-bg-elevated);
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--qt-text-primary);
        }
        .qt-compare-table td {
            color: var(--qt-text-secondary);
            font-size: 0.9rem;
        }
        .qt-compare-table tr:last-child td {
            border-bottom: none;
        }
        .qt-compare-table .qt-check {
            color: var(--qt-primary);
        }
        /* ========== STEP FLOW ========== */
        .qt-step-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: qt-step;
        }
        .qt-step-item {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 28px 24px;
            position: relative;
            transition: var(--qt-transition);
        }
        .qt-step-item:hover {
            background: var(--qt-bg-card-hover);
            border-color: var(--qt-border-light);
            transform: translateY(-3px);
            box-shadow: var(--qt-shadow-sm);
        }
        .qt-step-num {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--qt-primary), var(--qt-primary-dark));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            color: #0a0f1a;
            margin-bottom: 16px;
        }
        .qt-step-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .qt-step-item p {
            font-size: 0.88rem;
            color: var(--qt-text-secondary);
            margin-bottom: 0;
        }
        @media (max-width: 992px) {
            .qt-step-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 576px) {
            .qt-step-grid {
                grid-template-columns: 1fr;
            }
        }
        /* ========== REPLAY LIST ========== */
        .qt-replay-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .qt-replay-item {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-sm);
            padding: 14px 20px;
            transition: var(--qt-transition);
        }
        .qt-replay-item:hover {
            background: var(--qt-bg-card-hover);
            border-color: var(--qt-border-light);
            transform: translateX(4px);
        }
        .qt-replay-item .qt-replay-thumb {
            width: 64px;
            height: 44px;
            border-radius: 6px;
            overflow: hidden;
            flex-shrink: 0;
        }
        .qt-replay-item .qt-replay-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .qt-replay-item .qt-replay-info {
            flex: 1;
            min-width: 0;
        }
        .qt-replay-item .qt-replay-info h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 2px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .qt-replay-item .qt-replay-info p {
            font-size: 0.8rem;
            color: var(--qt-text-muted);
            margin-bottom: 0;
        }
        .qt-replay-item .qt-replay-action {
            flex-shrink: 0;
        }
        .qt-replay-item .qt-replay-action a {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--qt-primary);
        }
        /* ========== RESPONSIVE GRID ========== */
        .qt-grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .qt-grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        @media (max-width: 992px) {
            .qt-grid-3 {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .qt-grid-3 {
                grid-template-columns: 1fr;
            }
            .qt-grid-2 {
                grid-template-columns: 1fr;
            }
        }
        .qt-divider {
            border: none;
            height: 1px;
            background: var(--qt-border);
            margin: 0;
        }
        .qt-highlight-text {
            color: var(--qt-primary);
        }
        .qt-stat-block {
            background: var(--qt-bg-card);
            border: 1px solid var(--qt-border);
            border-radius: var(--qt-radius-md);
            padding: 32px 24px;
            text-align: center;
        }
        .qt-stat-block .qt-stat-num {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--qt-primary);
            letter-spacing: -0.5px;
        }
        .qt-stat-block .qt-stat-label {
            color: var(--qt-text-muted);
            font-size: 0.9rem;
            margin-top: 4px;
        }
        .qt-image-with-text {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .qt-image-with-text .qt-image-wrap {
            border-radius: var(--qt-radius-lg);
            overflow: hidden;
            border: 1px solid var(--qt-border);
        }
        .qt-image-with-text .qt-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 300px;
        }
        .qt-image-with-text .qt-text-content h2 {
            font-size: 1.9rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .qt-image-with-text .qt-text-content p {
            color: var(--qt-text-secondary);
            font-size: 0.98rem;
            margin-bottom: 12px;
        }
        .qt-image-with-text.reverse {
            direction: rtl;
        }
        .qt-image-with-text.reverse > * {
            direction: ltr;
        }
        @media (max-width: 768px) {
            .qt-image-with-text {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .qt-image-with-text.reverse {
                direction: ltr;
            }
        }