/* roulang page: index */
:root {
            --primary: #2B6CB0;
            --primary-dark: #1E4F80;
            --secondary: #6C5CE7;
            --accent: #F97316;
            --bg: #F7F9FC;
            --surface: #FFFFFF;
            --surface-alt: #EEF2F7;
            --text: #1A202C;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --success: #22C55E;
            --danger: #EF4444;
            --radius-card: 12px;
            --radius-button: 8px;
            --shadow-card: 0 2px 8px rgba(26, 32, 44, 0.06), 0 8px 24px rgba(26, 32, 44, 0.05);
            --shadow-hover: 0 4px 12px rgba(26, 32, 44, 0.08), 0 12px 32px rgba(26, 32, 44, 0.08);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --transition: 200ms ease;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 0.95rem;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        .container {
            max-width: 1140px;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        section {
            padding-top: 3.5rem;
            padding-bottom: 3.5rem;
        }
        .section-alt {
            background-color: var(--surface-alt);
        }
        .section-title {
            font-size: clamp(1.3rem, 2vw, 1.6rem);
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.75rem;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 2rem;
            max-width: 720px;
            line-height: 1.7;
        }

        /* Header & Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            min-height: 64px;
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 2px 16px rgba(26, 32, 44, 0.08);
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text);
            white-space: nowrap;
        }
        .navbar-brand:hover {
            color: var(--primary);
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #EDE9FE 0%, #F1F5F9 100%);
            border-radius: 8px;
            color: var(--secondary);
        }
        .brand-icon svg {
            width: 22px;
            height: 22px;
        }
        .navbar {
            padding-top: 0.5rem;
            padding-bottom: 0.5rem;
        }
        .navbar-nav .nav-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            padding-left: 0.9rem;
            padding-right: 0.9rem;
            transition: color var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .navbar-nav .nav-link:hover {
            color: var(--primary);
        }
        .navbar-nav .nav-link.active {
            color: var(--primary);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0.9rem;
            right: 0.9rem;
            bottom: 0.2rem;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .status-chips {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            margin-left: 0.5rem;
        }
        .chip {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            font-size: 0.8rem;
            padding: 0.15rem 0.6rem;
            border-radius: 999px;
            white-space: nowrap;
            font-weight: 500;
            line-height: 1.5;
            border: 1px solid transparent;
            cursor: default;
        }
        .chip-warmup {
            background: var(--surface);
            border-color: #C4D3E8;
            color: #4A6FA5;
        }
        .chip-live {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            position: relative;
        }
        .chip-live::before {
            content: '';
            width: 6px;
            height: 6px;
            background: #fff;
            border-radius: 50%;
            animation: pulse-dot 1.6s ease-in-out infinite;
            flex-shrink: 0;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.6;
                transform: scale(0.8);
            }
        }
        .chip-replay {
            background: #F3EFFE;
            color: #5B4BC4;
            border-color: #D8CFF5;
        }
        .navbar-toggler {
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 0.35rem 0.6rem;
            background: var(--surface);
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%231A202C' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* Hero */
        .hero-section {
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, rgba(43, 108, 176, 0.06) 0%, rgba(108, 92, 231, 0.08) 50%, rgba(247, 249, 252, 0.4) 100%);
            overflow: hidden;
            padding: 3.5rem 0;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/b5ba1b09fd83ea6b.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.14;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(247, 249, 252, 0.86) 0%, rgba(247, 249, 252, 0.72) 40%, rgba(238, 242, 247, 0.6) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 680px;
        }
        .hero-countdown-bar {
            display: inline-flex;
            align-items: center;
            gap: 1rem;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 0.5rem 1rem;
            margin-bottom: 1.5rem;
            box-shadow: var(--shadow-card);
            flex-wrap: wrap;
        }
        .hero-countdown-label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text);
            white-space: nowrap;
        }
        .hero-countdown-timer {
            display: flex;
            gap: 0.5rem;
            align-items: baseline;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--primary-dark);
        }
        .hero-countdown-timer span {
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--text-muted);
            margin-left: 0.15rem;
        }
        .hero-title {
            font-size: clamp(1.8rem, 3.2vw, 2.6rem);
            font-weight: 700;
            color: var(--text);
            line-height: 1.25;
            margin-bottom: 1rem;
        }
        .hero-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            margin-bottom: 1.75rem;
            max-width: 560px;
            line-height: 1.7;
        }
        .hero-badges {
            display: flex;
            gap: 0.6rem;
            flex-wrap: wrap;
            margin-bottom: 1.5rem;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-muted);
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 0.25rem 0.7rem;
        }
        .hero-badge i {
            font-size: 0.9rem;
            color: var(--primary);
        }
        .hero-actions {
            display: flex;
            gap: 0.75rem;
            flex-wrap: wrap;
        }

        /* Buttons */
        .btn {
            border-radius: var(--radius-button);
            padding: 0.5rem 1.25rem;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all var(--transition);
            border: 1px solid transparent;
        }
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
        }
        .btn-primary:active {
            transform: scale(0.98);
            background: var(--primary-dark);
            border-color: var(--primary-dark);
        }
        .btn-outline-primary {
            background: var(--surface);
            border-color: var(--border);
            color: var(--text);
        }
        .btn-outline-primary:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--surface);
        }
        .btn-outline-primary:active {
            transform: scale(0.98);
            border-color: var(--primary-dark);
            color: var(--primary-dark);
        }
        .btn-link {
            color: var(--primary);
            padding: 0.25rem 0;
            text-decoration: none;
            font-weight: 500;
            border: none;
            background: none;
        }
        .btn-link:hover {
            color: var(--primary-dark);
        }
        .btn-link i {
            font-size: 0.8rem;
            transition: transform var(--transition);
        }
        .btn-link:hover i {
            transform: translateX(3px);
        }

        /* Cards */
        .card {
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            background: var(--surface);
            transition: all var(--transition);
        }
        .card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .card-img-top {
            border-top-left-radius: var(--radius-card);
            border-top-right-radius: var(--radius-card);
            height: 160px;
            object-fit: cover;
            width: 100%;
        }
        .card-body {
            padding: 1.25rem;
        }
        .card-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.3;
        }
        .card-text {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0.75rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* Tag / chip in cards */
        .tag {
            display: inline-flex;
            align-items: center;
            font-size: 0.8rem;
            padding: 0.15rem 0.6rem;
            border-radius: 999px;
            background: var(--surface-alt);
            color: var(--primary-dark);
            font-weight: 500;
            white-space: nowrap;
            transition: all var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: #fff;
        }
        .tag-accent {
            background: #FFF3E8;
            color: #C2410C;
        }
        .tag-accent:hover {
            background: var(--accent);
            color: #fff;
        }
        .tag-purple {
            background: #F3EFFE;
            color: #5B4BC4;
        }
        .tag-purple:hover {
            background: var(--secondary);
            color: #fff;
        }
        .tag-green {
            background: #E8F8EE;
            color: #15803D;
        }
        .tag-green:hover {
            background: var(--success);
            color: #fff;
        }

        /* Service Matrix */
        .service-card {
            padding: 1.25rem;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .service-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--surface-alt);
            color: var(--primary);
            margin-bottom: 0.75rem;
            font-size: 1.3rem;
            flex-shrink: 0;
        }
        .service-icon.purple {
            color: var(--secondary);
            background: #F3EFFE;
        }
        .service-icon.orange {
            color: var(--accent);
            background: #FFF3E8;
        }
        .service-icon.green {
            color: var(--success);
            background: #E8F8EE;
        }

        /* Data Strip */
        .data-strip {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.5rem;
            display: flex;
            align-items: center;
            gap: 1rem;
            height: 100%;
        }
        .data-strip-number {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary-dark);
            line-height: 1.2;
            white-space: nowrap;
        }
        .data-strip-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.4;
        }

        /* Timeline */
        .timeline-item {
            display: flex;
            gap: 1.25rem;
            padding-bottom: 1.5rem;
            position: relative;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-date {
            min-width: 80px;
            text-align: right;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            padding-top: 0.1rem;
            white-space: nowrap;
        }
        .timeline-dot {
            position: relative;
            flex-shrink: 0;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--primary);
            margin-top: 0.4rem;
            border: 3px solid var(--surface);
            box-shadow: 0 0 0 2px var(--primary);
        }
        .timeline-dot.warmup {
            background: #8FAEC8;
            box-shadow: 0 0 0 2px #8FAEC8;
        }
        .timeline-dot.replay {
            background: var(--secondary);
            box-shadow: 0 0 0 2px var(--secondary);
        }
        .timeline-dot::after {
            content: '';
            position: absolute;
            top: 14px;
            left: 50%;
            transform: translateX(-50%);
            width: 2px;
            height: calc(100% + 1.5rem);
            background: var(--border);
        }
        .timeline-item:last-child .timeline-dot::after {
            display: none;
        }
        .timeline-content {
            flex: 1;
            padding-bottom: 0.5rem;
        }
        .timeline-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.25rem;
        }
        .timeline-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Process Steps */
        .process-step {
            text-align: center;
            padding: 1.25rem;
            position: relative;
        }
        .process-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 0.75rem;
            position: relative;
            z-index: 2;
            flex-shrink: 0;
        }
        .process-step h3 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.25rem;
        }
        .process-step p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .process-connector {
            position: absolute;
            top: 38px;
            left: 50%;
            width: calc(100% - 48px);
            height: 2px;
            background: var(--border);
            border-top: 1px dashed var(--border);
            z-index: 1;
        }

        /* Channel Cards */
        .channel-card {
            overflow: hidden;
        }
        .channel-status {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--success);
        }
        .channel-status .live-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--success);
            animation: pulse-dot 1.6s ease-in-out infinite;
            flex-shrink: 0;
        }
        .channel-viewers {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Brand Intro */
        .brand-intro-section {
            background: var(--surface-alt);
            border-radius: var(--radius-card);
            padding: 2rem;
            position: relative;
            overflow: hidden;
            border: 1px solid var(--border);
        }
        .brand-intro-watermark {
            position: absolute;
            right: -30px;
            bottom: -30px;
            opacity: 0.1;
            width: 160px;
            height: 160px;
            color: var(--secondary);
            pointer-events: none;
            z-index: 0;
        }
        .brand-intro-text {
            position: relative;
            z-index: 1;
            font-size: 0.95rem;
            color: var(--text);
            line-height: 1.8;
        }
        .brand-intro-stats {
            position: relative;
            z-index: 1;
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
            margin-top: 1.25rem;
        }
        .brand-intro-stat {
            display: flex;
            align-items: baseline;
            gap: 0.4rem;
        }
        .brand-intro-stat .num {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary);
        }
        .brand-intro-stat .lbl {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Case Cards */
        .case-card .card-img-top {
            height: 160px;
        }
        .case-result {
            font-size: 0.85rem;
            color: var(--success);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 0.3rem;
            margin-bottom: 0.5rem;
        }

        /* Streamer Cards */
        .streamer-card {
            text-align: center;
            padding: 1.5rem 1rem;
            height: 100%;
        }
        .streamer-avatar {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            margin: 0 auto 0.75rem;
            object-fit: cover;
            border: 3px solid var(--surface-alt);
            box-shadow: var(--shadow-card);
        }
        .streamer-name {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.2rem;
        }
        .streamer-field {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 0.5rem;
        }
        .streamer-fans {
            font-size: 0.8rem;
            color: var(--primary);
            font-weight: 600;
            margin-bottom: 0.75rem;
        }

        /* News List */
        .news-item {
            display: flex;
            gap: 1.25rem;
            padding: 1.25rem;
            border-bottom: 1px solid var(--border);
            transition: background var(--transition);
        }
        .news-item:last-child {
            border-bottom: none;
        }
        .news-item:hover {
            background: var(--surface-alt);
            border-radius: 8px;
        }
        .news-date {
            min-width: 70px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            padding-top: 0.15rem;
            white-space: nowrap;
            text-align: center;
            background: var(--surface-alt);
            border-radius: 6px;
            padding: 0.4rem 0.5rem;
            height: fit-content;
            align-self: flex-start;
        }
        .news-content {
            flex: 1;
        }
        .news-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.35rem;
            line-height: 1.4;
        }
        .news-summary {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0.5rem;
        }

        /* Partner Logos */
        .partner-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }
        .partner-logo {
            width: 120px;
            height: 60px;
            background: var(--surface-alt);
            border: 1px solid var(--border);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #94A3B8;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            opacity: 0.75;
            transition: all var(--transition);
            cursor: default;
        }
        .partner-logo:hover {
            opacity: 1;
            background: var(--surface);
            border-color: #C4D3E8;
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--border);
            border-radius: 8px;
            margin-bottom: 0.75rem;
            background: var(--surface);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item.open {
            box-shadow: var(--shadow-card);
            border-color: var(--primary);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            text-align: left;
            padding: 0.85rem 1.25rem;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 0.75rem;
            cursor: pointer;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-arrow {
            flex-shrink: 0;
            width: 16px;
            height: 16px;
            color: var(--text-muted);
            transition: transform var(--transition);
        }
        .faq-item.open .faq-arrow {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            padding: 0 1.25rem 1.25rem;
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* Guarantee Strip */
        .guarantee-item {
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            padding: 0.75rem 0;
        }
        .guarantee-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--surface-alt);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            flex-shrink: 0;
            margin-top: 0.15rem;
        }
        .guarantee-text {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .guarantee-text strong {
            display: block;
            font-size: 0.9rem;
            color: var(--text);
            font-weight: 600;
            margin-bottom: 0.15rem;
        }

        /* Data Dashboard */
        .dashboard-card {
            padding: 1.5rem;
            height: 100%;
        }
        .dashboard-title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.75rem;
        }
        .bar-chart {
            display: flex;
            gap: 0.5rem;
            align-items: flex-end;
            height: 100px;
            margin-bottom: 0.5rem;
        }
        .bar-chart .bar {
            flex: 1;
            background: var(--primary);
            border-radius: 4px 4px 0 0;
            min-height: 8px;
            transition: all var(--transition);
        }
        .bar-chart .bar:hover {
            background: var(--primary-dark);
        }
        .bar-chart .bar:nth-child(2n) {
            background: var(--secondary);
            opacity: 0.85;
        }
        .bar-chart .bar:nth-child(2n):hover {
            background: var(--secondary);
            opacity: 1;
        }
        .bar-labels {
            display: flex;
            gap: 0.5rem;
            font-size: 0.7rem;
            color: var(--text-muted);
            text-align: center;
        }
        .bar-labels span {
            flex: 1;
        }
        .dashboard-number {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary-dark);
            line-height: 1.2;
        }
        .dashboard-label {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* Contact / CTA */
        .cta-section {
            background: linear-gradient(135deg, rgba(43, 108, 176, 0.06) 0%, rgba(108, 92, 231, 0.08) 100%);
            border-radius: var(--radius-card);
            padding: 2.5rem;
            border: 1px solid var(--border);
        }
        .cta-form .form-label {
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text);
            margin-bottom: 0.3rem;
        }
        .cta-form .form-control {
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 0.5rem 0.9rem;
            font-size: 0.9rem;
            transition: all var(--transition);
            background: var(--surface);
            color: var(--text);
        }
        .cta-form .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(43, 108, 176, 0.15);
            outline: none;
        }
        .cta-form textarea.form-control {
            min-height: 90px;
            resize: vertical;
        }
        .contact-info-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 1.25rem;
            height: 100%;
        }
        .contact-info-item {
            display: flex;
            gap: 0.6rem;
            align-items: flex-start;
            margin-bottom: 0.75rem;
            font-size: 0.88rem;
            color: var(--text-muted);
        }
        .contact-info-item:last-child {
            margin-bottom: 0;
        }
        .contact-info-item i {
            color: var(--primary);
            font-size: 0.95rem;
            margin-top: 0.15rem;
            flex-shrink: 0;
        }

        /* Footer */
        .site-footer {
            background: #1A202C;
            color: rgba(255, 255, 255, 0.75);
            padding: 3.5rem 0 1.5rem;
            margin-top: 3.5rem;
        }
        .site-footer h5 {
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }
        .site-footer a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.85rem;
            transition: color var(--transition);
        }
        .site-footer a:hover {
            color: #fff;
        }
        .footer-brand {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 0.75rem;
        }
        .footer-brand .brand-icon {
            width: 30px;
            height: 30px;
            background: rgba(255, 255, 255, 0.1);
            color: #C4B5FD;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .footer-desc {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 260px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 0.4rem;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            margin-top: 2.5rem;
            padding-top: 1.5rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.75rem;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.8rem;
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 991px) {
            .hero-section {
                min-height: 420px;
                padding: 2.5rem 0;
            }
            .status-chips {
                margin-left: 0;
                margin-top: 0.5rem;
                flex-wrap: wrap;
            }
            .navbar-collapse {
                padding-bottom: 0.75rem;
            }
            .process-connector {
                display: none;
            }
            .timeline-date {
                min-width: 65px;
                font-size: 0.75rem;
            }
        }
        @media (max-width: 768px) {
            section {
                padding-top: 2.5rem;
                padding-bottom: 2.5rem;
            }
            .hero-section {
                min-height: 380px;
                padding: 2rem 0;
            }
            .hero-countdown-bar {
                gap: 0.5rem;
                padding: 0.4rem 0.75rem;
            }
            .hero-countdown-timer {
                font-size: 0.95rem;
            }
            .hero-actions .btn {
                width: 100%;
                display: block;
                margin-bottom: 0.5rem;
            }
            .news-item {
                flex-direction: column;
                gap: 0.5rem;
            }
            .news-date {
                text-align: left;
                align-self: flex-start;
            }
            .brand-intro-section {
                padding: 1.5rem;
            }
            .cta-section {
                padding: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .data-strip {
                padding: 1rem;
            }
            .data-strip-number {
                font-size: 1.3rem;
            }
        }
        @media (max-width: 576px) {
            .hero-title {
                font-size: 1.5rem;
            }
            .hero-subtitle {
                font-size: 0.9rem;
            }
            section {
                padding-top: 2rem;
                padding-bottom: 2rem;
            }
            .section-title {
                font-size: 1.2rem;
            }
            .process-step {
                padding: 0.75rem;
            }
            .partner-logo {
                width: 90px;
                height: 48px;
                font-size: 0.7rem;
            }
            .bar-chart {
                height: 70px;
            }
            .dashboard-number {
                font-size: 1.2rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2B6CB0;
            --primary-dark: #1E4F80;
            --secondary: #6C5CE7;
            --accent: #F97316;
            --bg: #F7F9FC;
            --surface: #FFFFFF;
            --surface-alt: #EEF2F7;
            --text: #1A202C;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --success: #22C55E;
            --danger: #EF4444;
            --radius-card: 12px;
            --radius-button: 8px;
            --shadow-card: 0 2px 8px rgba(26, 32, 44, 0.06), 0 8px 24px rgba(26, 32, 44, 0.05);
            --shadow-hover: 0 4px 12px rgba(26, 32, 44, 0.08), 0 12px 32px rgba(26, 32, 44, 0.08);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --transition: 200ms ease;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 0.95rem;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea, select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        .container {
            max-width: 1140px;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        section {
            padding-top: 3.5rem;
            padding-bottom: 3.5rem;
        }
        .section-alt {
            background-color: var(--surface-alt);
        }
        .section-title {
            font-size: clamp(1.3rem, 2vw, 1.6rem);
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.75rem;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 2rem;
            max-width: 720px;
            line-height: 1.7;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            min-height: 64px;
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 2px 16px rgba(26, 32, 44, 0.08);
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text);
            white-space: nowrap;
        }
        .navbar-brand:hover {
            color: var(--primary);
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #EDE9FE 0%, #F1F5F9 100%);
            border-radius: 8px;
            color: var(--secondary);
        }
        .brand-icon svg {
            width: 22px;
            height: 22px;
        }
        .navbar {
            padding-top: 0.5rem;
            padding-bottom: 0.5rem;
        }
        .navbar-nav .nav-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            padding-left: 0.9rem;
            padding-right: 0.9rem;
            transition: color var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .navbar-nav .nav-link:hover {
            color: var(--primary);
        }
        .navbar-nav .nav-link.active {
            color: var(--primary);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0.9rem;
            right: 0.9rem;
            bottom: 0.2rem;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .status-chips {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            margin-left: 0.5rem;
        }
        .chip {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            font-size: 0.8rem;
            padding: 0.15rem 0.6rem;
            border-radius: 999px;
            white-space: nowrap;
            font-weight: 500;
            line-height: 1.5;
            border: 1px solid transparent;
            cursor: default;
        }
        .chip-warmup {
            background: var(--surface);
            border-color: #C4D3E8;
            color: #4A6FA5;
        }
        .chip-live {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            position: relative;
        }
        .chip-live::before {
            content: '';
            width: 6px;
            height: 6px;
            background: #fff;
            border-radius: 50%;
            animation: pulse-dot 1.6s ease-in-out infinite;
            flex-shrink: 0;
        }
        .chip-replay {
            background: #F3EFFE;
            color: #5B4BC4;
            border-color: #D8CFF5;
        }
        .navbar-toggler {
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 0.35rem 0.6rem;
            background: var(--surface);
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='%231A202C' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
        }
        .page-hero {
            background: linear-gradient(135deg, #F7F9FC 0%, #EEF2FF 52%, #F7F4FF 100%);
            padding: 3rem 0 2.5rem;
            border-bottom: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            right: -60px;
            top: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(108,92,231,0.12), transparent 70%);
            pointer-events: none;
        }
        .page-hero .hero-title {
            font-size: clamp(1.5rem, 2.4vw, 2rem);
            font-weight: 700;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 0.5rem;
        }
        .page-hero .hero-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
            max-width: 720px;
            margin-bottom: 0;
        }
        .breadcrumb-area {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 0.6rem;
        }
        .breadcrumb-area a {
            color: var(--primary);
        }
        .timeline-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.25rem 1.25rem 1.25rem 1.5rem;
            transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
            height: 100%;
            position: relative;
            overflow: hidden;
        }
        .timeline-card::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--primary);
            opacity: 0.7;
        }
        .timeline-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(43,108,176,0.3);
        }
        .timeline-date {
            font-size: 0.85rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 0.4rem;
            margin-bottom: 0.5rem;
        }
        .timeline-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }
        .timeline-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
        }
        .btn-primary {
            background: var(--primary);
            border: 1px solid var(--primary);
            color: #fff;
            padding: 0.5rem 1.25rem;
            border-radius: var(--radius-button);
            font-size: 0.9rem;
            font-weight: 500;
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-outline-custom {
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--text);
            padding: 0.5rem 1.25rem;
            border-radius: var(--radius-button);
            font-size: 0.9rem;
            font-weight: 500;
            transition: color var(--transition), border-color var(--transition), background var(--transition);
        }
        .btn-outline-custom:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: #F9FBFF;
        }
        .btn-text {
            background: transparent;
            border: 0;
            color: var(--primary);
            padding: 0;
            font-size: 0.9rem;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
        }
        .btn-text:hover {
            color: var(--primary-dark);
        }
        .badge-custom {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            font-size: 0.8rem;
            padding: 0.15rem 0.6rem;
            border-radius: 999px;
            font-weight: 500;
            line-height: 1.5;
            white-space: nowrap;
            border: 1px solid transparent;
        }
        .badge-warmup {
            background: #F0F5FB;
            border-color: #C4D3E8;
            color: #4A6FA5;
        }
        .badge-live {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .badge-replay {
            background: #F3EFFE;
            border-color: #D8CFF5;
            color: #5B4BC4;
        }
        .info-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.25rem;
            height: 100%;
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .info-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .info-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 10px;
            background: #EDE9FE;
            color: var(--secondary);
            font-size: 1.2rem;
            margin-bottom: 0.75rem;
        }
        .info-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.4rem;
        }
        .info-text {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .review-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            height: 100%;
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .review-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .review-image {
            height: 170px;
            background: #E4EAF3;
            overflow: hidden;
            position: relative;
        }
        .review-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .review-body {
            padding: 1.25rem;
        }
        .review-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
        }
        .review-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0.75rem;
        }
        .review-meta {
            font-size: 0.85rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .calendar-note {
            background: var(--surface-alt);
            border: 1px dashed #CBD5E1;
            border-radius: var(--radius-card);
            padding: 1.25rem;
        }
        .calendar-note h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
        }
        .calendar-note p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .footer-cta {
            background: linear-gradient(135deg, #F7F9FC 0%, #EEF2FF 52%, #F7F4FF 100%);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 2rem 1.5rem;
            text-align: center;
        }
        .footer-cta h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.5rem;
        }
        .footer-cta p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }
        .site-footer {
            background: #1A202C;
            color: #E2E8F0;
            padding-top: 3rem;
            padding-bottom: 0;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-brand .brand-icon {
            background: rgba(108,92,231,0.25);
            color: #D8CFF5;
        }
        .footer-desc {
            font-size: 0.85rem;
            color: #A0AEC0;
            margin-bottom: 1rem;
            max-width: 320px;
        }
        .site-footer h5 {
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-links {
            list-style: none;
            padding-left: 0;
            margin-bottom: 0;
        }
        .footer-links li {
            margin-bottom: 0.5rem;
        }
        .footer-links a {
            font-size: 0.85rem;
            color: #A0AEC0;
            transition: color var(--transition);
        }
        .footer-links a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            margin-top: 2rem;
            padding: 1rem 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 0.85rem;
            color: #A0AEC0;
        }
        .footer-bottom a {
            color: #A0AEC0;
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        @keyframes pulse-dot {
            0%,100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.4); }
        }
        @media (max-width: 991px) {
            .status-chips {
                margin-left: 0;
                margin-top: 0.75rem;
            }
            .navbar-collapse {
                padding-bottom: 1rem;
            }
            .page-hero {
                padding: 2.5rem 0 2rem;
            }
        }
        @media (max-width: 768px) {
            section {
                padding-top: 2.5rem;
                padding-bottom: 2.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .review-image {
                height: 180px;
            }
        }
        @media (max-width: 576px) {
            .page-hero .hero-title {
                font-size: 1.5rem;
            }
            .btn-primary,
            .btn-outline-custom {
                width: 100%;
                text-align: center;
            }
            .timeline-card {
                padding: 1rem;
            }
            .footer-cta {
                padding: 1.5rem 1rem;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #2B6CB0;
            --primary-dark: #1E4F80;
            --secondary: #6C5CE7;
            --accent: #F97316;
            --bg: #F7F9FC;
            --surface: #FFFFFF;
            --surface-alt: #EEF2F7;
            --text: #1A202C;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --success: #22C55E;
            --danger: #EF4444;
            --radius-card: 12px;
            --radius-button: 8px;
            --shadow-card: 0 2px 8px rgba(26, 32, 44, 0.06), 0 8px 24px rgba(26, 32, 44, 0.05);
            --shadow-hover: 0 4px 12px rgba(26, 32, 44, 0.08), 0 12px 32px rgba(26, 32, 44, 0.08);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --transition: 200ms ease;
        }

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

        body {
            font-family: var(--font-family);
            font-size: 0.95rem;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

        .container {
            max-width: 1140px;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        section {
            padding-top: 3.5rem;
            padding-bottom: 3.5rem;
        }

        .section-alt {
            background-color: var(--surface-alt);
        }

        .section-title {
            font-size: clamp(1.3rem, 2vw, 1.6rem);
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.75rem;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 2rem;
            max-width: 720px;
            line-height: 1.7;
        }

        /* Header & Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            min-height: 64px;
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 16px rgba(26, 32, 44, 0.08);
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text);
            white-space: nowrap;
        }

        .navbar-brand:hover {
            color: var(--primary);
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #EDE9FE 0%, #F1F5F9 100%);
            border-radius: 8px;
            color: var(--secondary);
        }

        .brand-icon svg {
            width: 22px;
            height: 22px;
        }

        .navbar {
            padding-top: 0.5rem;
            padding-bottom: 0.5rem;
        }

        .navbar-nav .nav-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            padding-left: 0.9rem;
            padding-right: 0.9rem;
            transition: color var(--transition);
            white-space: nowrap;
            position: relative;
        }

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

        .navbar-nav .nav-link.active {
            color: var(--primary);
        }

        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0.9rem;
            right: 0.9rem;
            bottom: 0.2rem;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .status-chips {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            margin-left: 0.5rem;
        }

        .chip {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            font-size: 0.8rem;
            padding: 0.15rem 0.6rem;
            border-radius: 999px;
            white-space: nowrap;
            font-weight: 500;
            line-height: 1.5;
            border: 1px solid transparent;
            cursor: default;
        }

        .chip-warmup {
            background: var(--surface);
            border-color: #C4D3E8;
            color: #4A6FA5;
        }

        .chip-live {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            position: relative;
        }

        .chip-live::before {
            content: '';
            width: 6px;
            height: 6px;
            background: #fff;
            border-radius: 50%;
            animation: pulse-dot 1.6s ease-in-out infinite;
            flex-shrink: 0;
        }

        .chip-replay {
            background: #F3EFFE;
            color: #5B4BC4;
            border-color: #D8CFF5;
        }

        .navbar-toggler {
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 0.35rem 0.6rem;
            background: var(--surface);
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%231A202C' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.4); }
        }

        /* Category H1 Banner */
        .category-banner {
            background: linear-gradient(135deg, #EEF4FB 0%, #F5F3FF 100%);
            padding-top: 3rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid var(--border);
        }

        .category-banner h1 {
            font-size: clamp(1.5rem, 2.4vw, 2rem);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.3;
        }

        .category-banner .lead {
            font-size: 0.95rem;
            color: var(--text-muted);
            max-width: 560px;
            line-height: 1.7;
        }

        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 0.75rem;
        }

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

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

        .breadcrumb-custom .sep {
            color: var(--border);
        }

        /* Tutorial Cards */
        .tutorial-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition), box-shadow var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

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

        .tutorial-card .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
        }

        .tutorial-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .tutorial-card .badge-cat {
            position: absolute;
            top: 0.75rem;
            left: 0.75rem;
            background: rgba(255, 255, 255, 0.92);
            color: var(--primary-dark);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.6rem;
            border-radius: 999px;
            border: 1px solid var(--border);
        }

        .tutorial-card .card-body-content {
            padding: 1.25rem;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .tutorial-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }

        .tutorial-card .excerpt {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 1rem;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .tutorial-card .meta-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: 0.75rem;
        }

        .tutorial-card .read-more {
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
        }

        .tutorial-card .read-more:hover {
            color: var(--primary-dark);
        }

        /* Steps */
        .step-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 1.5rem 1.25rem;
            box-shadow: var(--shadow-card);
            height: 100%;
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
        }

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

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            border-radius: 50%;
            margin-bottom: 0.75rem;
        }

        .step-card h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
        }

        .step-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* Device Cards */
        .device-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 1.25rem;
            box-shadow: var(--shadow-card);
            height: 100%;
            transition: transform var(--transition), box-shadow var(--transition);
        }

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

        .device-icon {
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: #F3EFFE;
            color: var(--secondary);
            border-radius: 10px;
            font-size: 1.3rem;
            margin-bottom: 0.75rem;
        }

        .device-card h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
        }

        .device-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 0;
        }

        /* Tips List */
        .tips-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.5rem;
            height: 100%;
        }

        .tips-card .tip-item {
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            padding: 0.6rem 0;
            border-bottom: 1px dashed var(--border);
        }

        .tips-card .tip-item:last-child {
            border-bottom: none;
        }

        .tips-card .tip-icon {
            color: var(--success);
            font-size: 1.1rem;
            flex-shrink: 0;
            margin-top: 0.1rem;
        }

        .tips-card .tip-text {
            font-size: 0.88rem;
            color: var(--text);
            line-height: 1.65;
        }

        /* Stats Strip */
        .stats-strip {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 2rem 1.5rem;
        }

        .stat-number {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary-dark);
            line-height: 1.2;
        }

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

        /* FAQ */
        .accordion-custom .accordion-item {
            border: 1px solid var(--border);
            border-radius: 8px !important;
            margin-bottom: 0.75rem;
            overflow: hidden;
            background: var(--surface);
            box-shadow: var(--shadow-card);
        }

        .accordion-custom .accordion-button {
            background: var(--surface);
            color: var(--text);
            font-weight: 600;
            font-size: 0.95rem;
            padding: 1rem 1.25rem;
            border: none;
            box-shadow: none;
            border-radius: 8px;
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--surface);
            color: var(--primary);
            box-shadow: none;
        }

        .accordion-custom .accordion-button::after {
            filter: grayscale(1) brightness(0.5);
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: 0 0 0 2px rgba(43, 108, 176, 0.2);
            border-color: var(--primary);
        }

        .accordion-custom .accordion-body {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            padding: 0 1.25rem 1.25rem;
        }

        /* CTA */
        .cta-panel {
            background: linear-gradient(135deg, #EEF4FB 0%, #F5F3FF 100%);
            border-radius: var(--radius-card);
            padding: 2.5rem 2rem;
            border: 1px solid var(--border);
        }

        .cta-panel .cta-title {
            font-size: clamp(1.3rem, 2vw, 1.6rem);
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
        }

        .cta-panel p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
            max-width: 520px;
        }

        .btn-academy-primary {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-button);
            padding: 0.5rem 1.25rem;
            font-weight: 500;
            font-size: 0.9rem;
            transition: background var(--transition), transform var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }

        .btn-academy-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
        }

        .btn-academy-primary:active {
            transform: scale(0.98);
        }

        .btn-academy-secondary {
            background: var(--surface);
            color: var(--text);
            border: 1px solid var(--border);
            border-radius: var(--radius-button);
            padding: 0.5rem 1.25rem;
            font-weight: 500;
            font-size: 0.9rem;
            transition: border-color var(--transition), color var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }

        .btn-academy-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Footer */
        .site-footer {
            background: #1A202C;
            color: #CBD5E1;
            padding-top: 3rem;
            padding-bottom: 2rem;
            margin-top: 2rem;
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 0.75rem;
        }

        .site-footer .footer-brand .brand-icon {
            width: 32px;
            height: 32px;
            background: rgba(108, 92, 231, 0.25);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #B8AEE8;
        }

        .site-footer .footer-brand .brand-icon svg {
            width: 20px;
            height: 20px;
        }

        .site-footer .footer-desc {
            font-size: 0.85rem;
            color: #94A3B8;
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 320px;
        }

        .site-footer h5 {
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }

        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer .footer-links li {
            margin-bottom: 0.5rem;
        }

        .site-footer .footer-links a {
            color: #94A3B8;
            font-size: 0.85rem;
            transition: color var(--transition);
        }

        .site-footer .footer-links a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 2rem;
            padding-top: 1.25rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 0.8rem;
            color: #94A3B8;
        }

        .site-footer .footer-bottom a {
            color: #94A3B8;
            transition: color var(--transition);
        }

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

        /* Responsive */
        @media (max-width: 991px) {
            .status-chips {
                margin-left: 0;
                margin-top: 0.75rem;
                padding-top: 0.75rem;
                border-top: 1px solid var(--border);
                width: 100%;
            }

            .category-banner {
                padding-top: 2.5rem;
                padding-bottom: 2rem;
            }
        }

        @media (max-width: 768px) {
            section {
                padding-top: 2.5rem;
                padding-bottom: 2.5rem;
            }

            .cta-panel {
                padding: 1.75rem 1.25rem;
            }

            .tutorial-card .card-img-wrap {
                aspect-ratio: 16/10;
            }
        }

        @media (max-width: 576px) {
            .category-banner h1 {
                font-size: 1.5rem;
            }

            .btn-academy-primary,
            .btn-academy-secondary {
                display: block;
                width: 100%;
                text-align: center;
                justify-content: center;
                margin-bottom: 0.5rem;
            }

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

/* roulang page: category1 */
:root {
            --primary: #2B6CB0;
            --primary-dark: #1E4F80;
            --secondary: #6C5CE7;
            --accent: #F97316;
            --bg: #F7F9FC;
            --surface: #FFFFFF;
            --surface-alt: #EEF2F7;
            --text: #1A202C;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --success: #22C55E;
            --danger: #EF4444;
            --radius-card: 12px;
            --radius-button: 8px;
            --shadow-card: 0 2px 8px rgba(26, 32, 44, 0.06), 0 8px 24px rgba(26, 32, 44, 0.05);
            --shadow-hover: 0 4px 12px rgba(26, 32, 44, 0.08), 0 12px 32px rgba(26, 32, 44, 0.08);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --transition: 200ms ease;
        }

        * {
            box-sizing: border-box;
        }

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

        body {
            font-family: var(--font-family);
            font-size: 0.95rem;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }

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

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

        .container {
            max-width: 1140px;
            padding-left: 1rem;
            padding-right: 1rem;
            margin-left: auto;
            margin-right: auto;
        }

        section {
            padding-top: 3.5rem;
            padding-bottom: 3.5rem;
        }

        .section-alt {
            background-color: var(--surface-alt);
        }

        .section-title {
            font-size: clamp(1.3rem, 2vw, 1.6rem);
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.75rem;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 2rem;
            max-width: 720px;
            line-height: 1.7;
        }

        /* Header & Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            min-height: 64px;
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 16px rgba(26, 32, 44, 0.08);
        }

        .navbar {
            padding-top: 0.5rem;
            padding-bottom: 0.5rem;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text);
            white-space: nowrap;
        }

        .navbar-brand:hover {
            color: var(--primary);
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #EDE9FE 0%, #F1F5F9 100%);
            border-radius: 8px;
            color: var(--secondary);
        }

        .brand-icon svg {
            width: 22px;
            height: 22px;
        }

        .navbar-nav .nav-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            padding-left: 0.9rem;
            padding-right: 0.9rem;
            transition: color var(--transition);
            white-space: nowrap;
            position: relative;
        }

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

        .navbar-nav .nav-link.active {
            color: var(--primary);
        }

        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0.9rem;
            right: 0.9rem;
            bottom: 0.2rem;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .status-chips {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            margin-left: 0.5rem;
        }

        .chip {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            font-size: 0.8rem;
            padding: 0.15rem 0.6rem;
            border-radius: 999px;
            white-space: nowrap;
            font-weight: 500;
            line-height: 1.5;
            border: 1px solid transparent;
            cursor: default;
        }

        .chip-warmup {
            background: var(--surface);
            border-color: #C4D3E8;
            color: #4A6FA5;
        }

        .chip-live {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            position: relative;
        }

        .chip-live::before {
            content: '';
            width: 6px;
            height: 6px;
            background: #fff;
            border-radius: 50%;
            animation: pulse-dot 1.6s ease-in-out infinite;
            flex-shrink: 0;
        }

        .chip-replay {
            background: #F3EFFE;
            color: #5B4BC4;
            border-color: #D8CFF5;
        }

        .navbar-toggler {
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 0.35rem 0.6rem;
            background: var(--surface);
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(26, 32, 44, 0.7)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        @keyframes pulse-dot {
            0%, 100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.6;
                transform: scale(1.2);
            }
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background: var(--surface-alt);
            padding: 0.75rem 0;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .breadcrumb-bar .container {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-wrap: wrap;
        }

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

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

        .breadcrumb-bar .sep {
            color: var(--border);
        }

        .breadcrumb-bar .current {
            color: var(--text);
            font-weight: 500;
        }

        /* H1 Banner Section */
        .category-banner {
            background: linear-gradient(135deg, #F0F5FB 0%, #F5F1FE 100%);
            padding: 2.5rem 0 2.5rem;
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--border);
        }

        .category-banner::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(108, 92, 231, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }

        .category-banner h1 {
            font-size: clamp(1.5rem, 2.4vw, 2rem);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.3;
        }

        .category-banner .banner-subtitle {
            font-size: 0.95rem;
            color: var(--text-muted);
            max-width: 600px;
            line-height: 1.7;
        }

        .banner-bg-svg {
            position: absolute;
            right: 1.5rem;
            top: 50%;
            transform: translateY(-50%);
            opacity: 0.1;
            pointer-events: none;
            z-index: 0;
        }

        .banner-bg-svg svg {
            width: 180px;
            height: 180px;
        }

        /* Channel Cards */
        .channel-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

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

        .channel-card .card-cover {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--surface-alt);
        }

        .channel-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition);
        }

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

        .channel-card .card-body {
            padding: 1.25rem;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .channel-card .card-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.3;
        }

        .channel-card .card-text {
            font-size: 0.87rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0.75rem;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .channel-card .card-tags {
            display: flex;
            gap: 0.4rem;
            flex-wrap: wrap;
            margin-bottom: 0.75rem;
        }

        .channel-card .card-tags .chip {
            background: #F0F4F8;
            color: var(--primary-dark);
            font-size: 0.75rem;
            padding: 0.1rem 0.55rem;
        }

        .channel-card .channel-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-muted);
            padding-top: 0.6rem;
            border-top: 1px solid var(--border);
        }

        .online-dot {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .online-dot .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--border);
            flex-shrink: 0;
        }

        .online-dot .dot.live {
            background: var(--danger);
            box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15);
            animation: live-pulse 2s ease-in-out infinite;
        }

        .online-dot .dot.success {
            background: var(--success);
            box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.15);
        }

        @keyframes live-pulse {
            0%, 100% { box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.15); }
            50% { box-shadow: 0 0 0 5px rgba(239, 68, 68, 0.05); }
        }

        .viewer-count {
            font-weight: 600;
            color: var(--text);
        }

        /* Buttons */
        .btn-primary {
            background-color: var(--primary);
            border: 1px solid var(--primary);
            color: #fff;
            padding: 0.5rem 1.25rem;
            border-radius: var(--radius-button);
            font-weight: 500;
            font-size: 0.9rem;
            transition: background-color var(--transition), border-color var(--transition), transform var(--transition);
            cursor: pointer;
        }

        .btn-primary:hover {
            background-color: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-outline-primary {
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--text-muted);
            padding: 0.5rem 1.25rem;
            border-radius: var(--radius-button);
            font-weight: 500;
            font-size: 0.9rem;
            transition: border-color var(--transition), color var(--transition);
            cursor: pointer;
        }

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

        .btn-text {
            background: none;
            border: none;
            color: var(--primary);
            padding: 0.25rem 0;
            font-size: 0.9rem;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            transition: color var(--transition);
            cursor: pointer;
        }

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

        .btn-text i {
            font-size: 0.8rem;
            transition: transform var(--transition);
        }

        .btn-text:hover i {
            transform: translateX(3px);
        }

        /* Filter Chips */
        .filter-chips {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
            margin-bottom: 2rem;
        }

        .filter-chips .filter-chip {
            display: inline-flex;
            align-items: center;
            padding: 0.3rem 0.9rem;
            border-radius: 999px;
            font-size: 0.85rem;
            font-weight: 500;
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--text-muted);
            cursor: pointer;
            transition: all var(--transition);
            user-select: none;
        }

        .filter-chips .filter-chip:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: #F7FAFD;
        }

        .filter-chips .filter-chip.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        /* Featured Live */
        .featured-live-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .featured-live-card .featured-cover {
            position: relative;
            aspect-ratio: 16 / 8;
            overflow: hidden;
            background: var(--surface-alt);
        }

        .featured-live-card .featured-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .featured-live-card .live-badge {
            position: absolute;
            top: 0.75rem;
            left: 0.75rem;
            background: var(--danger);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 600;
            padding: 0.2rem 0.6rem;
            border-radius: 4px;
            letter-spacing: 0.5px;
        }

        .featured-live-card .featured-body {
            padding: 1.25rem;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .featured-live-card .featured-title {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.3;
        }

        .featured-live-card .featured-text {
            font-size: 0.87rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0.75rem;
            flex: 1;
        }

        .featured-live-card .featured-meta {
            display: flex;
            align-items: center;
            gap: 1rem;
            font-size: 0.8rem;
            color: var(--text-muted);
            padding-top: 0.6rem;
            border-top: 1px solid var(--border);
        }

        /* Guide Steps */
        .guide-step {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.5rem 1.25rem;
            text-align: center;
            height: 100%;
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .guide-step:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .guide-step .step-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: #F0F4F8;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            font-weight: 700;
            margin: 0 auto 0.75rem;
        }

        .guide-step .step-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.3;
        }

        .guide-step .step-text {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* Assurance */
        .assurance-item {
            display: flex;
            gap: 0.75rem;
            align-items: flex-start;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.25rem;
            height: 100%;
            transition: transform var(--transition), box-shadow var(--transition);
        }

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

        .assurance-item .assurance-icon {
            width: 40px;
            height: 40px;
            flex-shrink: 0;
            border-radius: 8px;
            background: #F0F4F8;
            color: var(--secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
        }

        .assurance-item .assurance-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.25rem;
            line-height: 1.3;
        }

        .assurance-item .assurance-text {
            font-size: 0.83rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* CTA Form */
        .cta-section {
            background: linear-gradient(135deg, #EEF4FA 0%, #F3EFFE 100%);
            border-radius: var(--radius-card);
            overflow: hidden;
            padding: 2.5rem 1.5rem;
        }

        .cta-card {
            background: var(--surface);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 1.75rem;
            height: 100%;
        }

        .form-label {
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text);
            margin-bottom: 0.3rem;
        }

        .form-control {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-button);
            padding: 0.5rem 0.75rem;
            font-size: 0.9rem;
            color: var(--text);
            transition: border-color var(--transition), box-shadow var(--transition);
            width: 100%;
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(43, 108, 176, 0.12);
            outline: none;
        }

        textarea.form-control {
            resize: vertical;
            min-height: 80px;
        }

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

        .contact-info-list li {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.6rem 0;
            border-bottom: 1px solid var(--border);
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .contact-info-list li:last-child {
            border-bottom: none;
        }

        .contact-info-list i {
            width: 20px;
            text-align: center;
            color: var(--primary);
        }

        /* Footer */
        .site-footer {
            background: #1A202C;
            color: rgba(255, 255, 255, 0.7);
            padding: 3rem 0 1.5rem;
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 1rem;
        }

        .site-footer .footer-brand .brand-icon {
            background: rgba(108, 92, 231, 0.2);
            color: #A5B4FC;
        }

        .site-footer .footer-desc {
            font-size: 0.85rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 1.5rem;
        }

        .site-footer h5 {
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
            margin-top: 0;
        }

        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer .footer-links li {
            margin-bottom: 0.5rem;
        }

        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.85rem;
            transition: color var(--transition);
        }

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

        .site-footer .footer-bottom {
            margin-top: 2rem;
            padding-top: 1rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.45);
            transition: color var(--transition);
        }

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

        /* Responsive */
        @media (max-width: 991px) {
            .navbar-collapse {
                padding-top: 0.75rem;
                padding-bottom: 0.75rem;
            }
            .status-chips {
                margin-left: 0;
                margin-top: 0.75rem;
                padding-top: 0.75rem;
                border-top: 1px solid var(--border);
                flex-wrap: wrap;
            }
            .navbar-nav .nav-link {
                padding-left: 0.5rem;
                padding-right: 0.5rem;
            }
            .navbar-nav .nav-link.active::after {
                left: 0.5rem;
                right: 0.5rem;
            }
        }

        @media (max-width: 768px) {
            section {
                padding-top: 2.5rem;
                padding-bottom: 2.5rem;
            }
            .category-banner {
                padding: 1.5rem 0;
            }
            .banner-bg-svg {
                display: none;
            }
            .channel-card .card-body {
                padding: 1rem;
            }
            .cta-section {
                padding: 1.5rem 1rem;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 576px) {
            .btn-primary,
            .btn-outline-primary {
                width: 100%;
                text-align: center;
            }
            .filter-chips {
                gap: 0.35rem;
            }
            .filter-chips .filter-chip {
                font-size: 0.78rem;
                padding: 0.25rem 0.7rem;
            }
            .guide-step {
                padding: 1.25rem 1rem;
            }
            .assurance-item {
                padding: 1rem;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #2B6CB0;
            --primary-dark: #1E4F80;
            --secondary: #6C5CE7;
            --accent: #F97316;
            --bg: #F7F9FC;
            --surface: #FFFFFF;
            --surface-alt: #EEF2F7;
            --text: #1A202C;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --success: #22C55E;
            --danger: #EF4444;
            --radius-card: 12px;
            --radius-button: 8px;
            --shadow-card: 0 2px 8px rgba(26, 32, 44, 0.06), 0 8px 24px rgba(26, 32, 44, 0.05);
            --shadow-hover: 0 4px 12px rgba(26, 32, 44, 0.08), 0 12px 32px rgba(26, 32, 44, 0.08);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --transition: 200ms ease;
        }

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

        body {
            font-family: var(--font-family);
            font-size: 0.95rem;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

        .container {
            max-width: 1140px;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        section {
            padding-top: 3.5rem;
            padding-bottom: 3.5rem;
        }

        .section-alt {
            background-color: var(--surface-alt);
        }

        .section-title {
            font-size: clamp(1.3rem, 2vw, 1.6rem);
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.75rem;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 2rem;
            max-width: 720px;
            line-height: 1.7;
        }

        /* Header & Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            min-height: 64px;
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 16px rgba(26, 32, 44, 0.08);
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text);
            white-space: nowrap;
        }

        .navbar-brand:hover {
            color: var(--primary);
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #EDE9FE 0%, #F1F5F9 100%);
            border-radius: 8px;
            color: var(--secondary);
        }

        .brand-icon svg {
            width: 22px;
            height: 22px;
        }

        .navbar {
            padding-top: 0.5rem;
            padding-bottom: 0.5rem;
        }

        .navbar-nav .nav-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            padding-left: 0.9rem;
            padding-right: 0.9rem;
            transition: color var(--transition);
            white-space: nowrap;
            position: relative;
        }

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

        .navbar-nav .nav-link.active {
            color: var(--primary);
        }

        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0.9rem;
            right: 0.9rem;
            bottom: 0.2rem;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .status-chips {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            margin-left: 0.5rem;
        }

        .chip {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            font-size: 0.8rem;
            padding: 0.15rem 0.6rem;
            border-radius: 999px;
            white-space: nowrap;
            font-weight: 500;
            line-height: 1.5;
            border: 1px solid transparent;
            cursor: default;
        }

        .chip-warmup {
            background: var(--surface);
            border-color: #C4D3E8;
            color: #4A6FA5;
        }

        .chip-live {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            position: relative;
        }

        .chip-live::before {
            content: '';
            width: 6px;
            height: 6px;
            background: #fff;
            border-radius: 50%;
            animation: pulse-dot 1.6s ease-in-out infinite;
            flex-shrink: 0;
        }

        .chip-replay {
            background: #F3EFFE;
            color: #5B4BC4;
            border-color: #D8CFF5;
        }

        .navbar-toggler {
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 0.35rem 0.6rem;
            background: var(--surface);
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(26, 32, 44, 0.7)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(0.8); }
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background-color: var(--surface-alt);
            padding: 0.75rem 0;
            border-bottom: 1px solid var(--border);
        }

        .breadcrumb {
            margin: 0;
            font-size: 0.85rem;
        }

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

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

        .breadcrumb-item.active {
            color: var(--text);
            font-weight: 500;
        }

        /* Category H1 Section */
        .category-hero {
            background: linear-gradient(135deg, #F0F6FF 0%, #F7F4FF 100%);
            padding: 2.5rem 0;
            border-bottom: 1px solid var(--border);
        }

        .category-hero h1 {
            font-size: clamp(1.5rem, 2.4vw, 2rem);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.3;
        }

        .category-hero .hero-subtitle {
            font-size: 0.95rem;
            color: var(--text-muted);
            max-width: 660px;
            line-height: 1.7;
            margin-bottom: 0;
        }

        .category-hero .hero-meta {
            display: flex;
            align-items: center;
            gap: 1rem;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .category-hero .hero-meta i {
            color: var(--primary);
        }

        /* Tutorial Article Cards */
        .tutorial-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: box-shadow var(--transition), transform var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

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

        .tutorial-card .card-img-wrap {
            position: relative;
            height: 180px;
            overflow: hidden;
        }

        .tutorial-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition);
        }

        .tutorial-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }

        .tutorial-card .card-body {
            padding: 1.25rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .tutorial-card .card-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.3;
        }

        .tutorial-card .card-text {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 1rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .tutorial-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: auto;
            font-size: 0.85rem;
            color: var(--text-muted);
            padding-top: 0.75rem;
            border-top: 1px solid var(--border);
        }

        .tutorial-card .card-meta .read-count {
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }

        .tutorial-card .card-meta .read-count i {
            color: var(--secondary);
        }

        .btn-outline-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--text-muted);
            padding: 0.4rem 1rem;
            border-radius: var(--radius-button);
            font-size: 0.85rem;
            font-weight: 500;
            transition: all var(--transition);
            white-space: nowrap;
        }

        .btn-outline-primary-custom:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: #F7FAFF;
        }

        /* Steps */
        .step-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 1.25rem;
            box-shadow: var(--shadow-card);
            height: 100%;
            position: relative;
        }

        .step-number {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.95rem;
            margin-bottom: 0.75rem;
        }

        .step-card h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.4rem;
            line-height: 1.3;
        }

        .step-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* Equipment Card */
        .equipment-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 1.25rem;
            box-shadow: var(--shadow-card);
            height: 100%;
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            transition: box-shadow var(--transition), transform var(--transition);
        }

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

        .equipment-card .equip-icon {
            width: 44px;
            height: 44px;
            flex-shrink: 0;
            background: #F3EFFE;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--secondary);
            font-size: 1.2rem;
        }

        .equipment-card h3 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.3rem;
            line-height: 1.3;
        }

        .equipment-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* Tip List */
        .tip-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .tip-list li {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 1rem 1.25rem;
            margin-bottom: 0.75rem;
            box-shadow: var(--shadow-card);
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
            transition: box-shadow var(--transition);
        }

        .tip-list li:hover {
            box-shadow: var(--shadow-hover);
        }

        .tip-list li i {
            color: var(--accent);
            font-size: 1rem;
            margin-top: 0.2rem;
            flex-shrink: 0;
        }

        .tip-list li span {
            font-size: 0.9rem;
            color: var(--text);
            line-height: 1.7;
        }

        /* FAQ Accordion */
        .accordion-custom .accordion-item {
            border: 1px solid var(--border);
            border-radius: 8px;
            margin-bottom: 0.75rem;
            overflow: hidden;
            background: var(--surface);
            box-shadow: var(--shadow-card);
        }

        .accordion-custom .accordion-button {
            background: var(--surface);
            color: var(--text);
            font-size: 0.95rem;
            font-weight: 600;
            padding: 1rem 1.25rem;
            border: none;
            box-shadow: none;
        }

        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--surface);
            color: var(--primary);
            box-shadow: none;
        }

        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            outline: none;
        }

        .accordion-custom .accordion-button::after {
            filter: invert(0.4);
            transition: transform var(--transition);
        }

        .accordion-custom .accordion-body {
            padding: 1rem 1.25rem;
            font-size: 0.9rem;
            line-height: 1.7;
            color: var(--text-muted);
            background: #FAFBFC;
            border-top: 1px solid var(--border);
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #F0F6FF 0%, #F7F4FF 100%);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .cta-card {
            background: var(--surface);
            border-radius: var(--radius-card);
            padding: 2rem;
            box-shadow: var(--shadow-card);
        }

        .cta-card h2 {
            font-size: clamp(1.3rem, 2vw, 1.6rem);
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.75rem;
            line-height: 1.3;
        }

        .cta-card p {
            color: var(--text-muted);
            margin-bottom: 1.5rem;
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 0.6rem 1.4rem;
            border-radius: var(--radius-button);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition);
        }

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

        .btn-primary-custom:active {
            transform: scale(0.98);
        }

        .btn-secondary-custom {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--surface);
            color: var(--text);
            border: 1px solid var(--border);
            padding: 0.6rem 1.4rem;
            border-radius: var(--radius-button);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition);
        }

        .btn-secondary-custom:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* Footer */
        .site-footer {
            background: #1A202C;
            color: #CBD5E1;
            padding-top: 3rem;
            padding-bottom: 1.5rem;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 0.75rem;
        }

        .footer-brand .brand-icon {
            background: rgba(108, 92, 231, 0.3);
            color: #B4A8F5;
        }

        .footer-desc {
            font-size: 0.85rem;
            color: #94A3B8;
            line-height: 1.7;
            margin-bottom: 0;
        }

        .site-footer h5 {
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
        }

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

        .footer-links li {
            margin-bottom: 0.5rem;
        }

        .footer-links a {
            color: #94A3B8;
            font-size: 0.85rem;
            transition: color var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 2rem;
            padding-top: 1.25rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 0.85rem;
            color: #94A3B8;
        }

        .footer-bottom a {
            color: #94A3B8;
            transition: color var(--transition);
        }

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

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--primary);
            background: #EFF6FF;
            border-radius: 999px;
            padding: 0.15rem 0.7rem;
            margin-bottom: 0.5rem;
        }

        /* Responsive */
        @media (max-width: 991px) {
            .status-chips {
                margin-left: 0;
                margin-top: 0.75rem;
                flex-wrap: wrap;
            }
            .category-hero {
                padding: 2rem 0;
            }
            .tutorial-card .card-img-wrap {
                height: 160px;
            }
        }

        @media (max-width: 768px) {
            section {
                padding-top: 2.5rem;
                padding-bottom: 2.5rem;
            }
            .tutorial-card .card-img-wrap {
                height: 200px;
            }
            .cta-card {
                padding: 1.5rem;
            }
            .equipment-card {
                flex-direction: column;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 576px) {
            .category-hero h1 {
                font-size: 1.4rem;
            }
            .tutorial-card .card-img-wrap {
                height: 180px;
            }
            .step-card {
                padding: 1rem;
            }
            .tip-list li {
                padding: 0.85rem 1rem;
            }
        }

/* roulang page: category5 */
:root {
            --primary: #2B6CB0;
            --primary-dark: #1E4F80;
            --secondary: #6C5CE7;
            --accent: #F97316;
            --bg: #F7F9FC;
            --surface: #FFFFFF;
            --surface-alt: #EEF2F7;
            --text: #1A202C;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --success: #22C55E;
            --danger: #EF4444;
            --radius-card: 12px;
            --radius-button: 8px;
            --shadow-card: 0 2px 8px rgba(26, 32, 44, 0.06), 0 8px 24px rgba(26, 32, 44, 0.05);
            --shadow-hover: 0 4px 12px rgba(26, 32, 44, 0.08), 0 12px 32px rgba(26, 32, 44, 0.08);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --transition: 200ms ease;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 0.95rem;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        .container {
            max-width: 1140px;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        section {
            padding-top: 3.5rem;
            padding-bottom: 3.5rem;
        }
        .section-alt {
            background-color: var(--surface-alt);
        }
        .section-title {
            font-size: clamp(1.3rem, 2vw, 1.6rem);
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.75rem;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 2rem;
            max-width: 720px;
            line-height: 1.7;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            min-height: 64px;
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 2px 16px rgba(26, 32, 44, 0.08);
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text);
            white-space: nowrap;
        }
        .navbar-brand:hover {
            color: var(--primary);
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #EDE9FE 0%, #F1F5F9 100%);
            border-radius: 8px;
            color: var(--secondary);
        }
        .brand-icon svg {
            width: 22px;
            height: 22px;
        }
        .navbar {
            padding-top: 0.5rem;
            padding-bottom: 0.5rem;
        }
        .navbar-nav .nav-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            padding-left: 0.9rem;
            padding-right: 0.9rem;
            transition: color var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .navbar-nav .nav-link:hover {
            color: var(--primary);
        }
        .navbar-nav .nav-link.active {
            color: var(--primary);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0.9rem;
            right: 0.9rem;
            bottom: 0.2rem;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .status-chips {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            margin-left: 0.5rem;
        }
        .chip {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            font-size: 0.8rem;
            padding: 0.15rem 0.6rem;
            border-radius: 999px;
            white-space: nowrap;
            font-weight: 500;
            line-height: 1.5;
            border: 1px solid transparent;
            cursor: default;
        }
        .chip-warmup {
            background: var(--surface);
            border-color: #C4D3E8;
            color: #4A6FA5;
        }
        .chip-live {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            position: relative;
        }
        .chip-live::before {
            content: '';
            width: 6px;
            height: 6px;
            background: #fff;
            border-radius: 50%;
            animation: pulse-dot 1.6s ease-in-out infinite;
            flex-shrink: 0;
        }
        .chip-replay {
            background: #F3EFFE;
            color: #5B4BC4;
            border-color: #D8CFF5;
        }
        .navbar-toggler {
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 0.35rem 0.6rem;
            background: var(--surface);
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(26,32,44,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.3); }
        }
        .breadcrumb-section {
            background: linear-gradient(135deg, #EAF2FB 0%, #F3EFFE 100%);
            padding-top: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb-section h1 {
            font-size: clamp(1.5rem, 2.4vw, 2rem);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.3;
        }
        .breadcrumb-section .subtitle {
            font-size: 0.95rem;
            color: var(--text-muted);
            max-width: 660px;
        }
        .breadcrumb-nav {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 0.75rem;
        }
        .breadcrumb-nav a {
            color: var(--text-muted);
        }
        .breadcrumb-nav a:hover {
            color: var(--primary);
        }
        .breadcrumb-nav .separator {
            margin: 0 0.35rem;
            color: var(--border);
        }
        .news-list-item {
            display: flex;
            gap: 1.5rem;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .news-list-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .news-date {
            flex-shrink: 0;
            width: 72px;
            text-align: center;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            background: var(--surface-alt);
            border-radius: 8px;
            padding: 0.75rem 0.5rem;
            height: fit-content;
        }
        .news-date .day {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.1;
        }
        .news-date .month-year {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 0.2rem;
        }
        .news-content {
            flex: 1;
        }
        .news-content h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }
        .news-content .summary {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0.75rem;
        }
        .news-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
            margin-bottom: 0.75rem;
        }
        .news-tags .tag {
            display: inline-flex;
            align-items: center;
            font-size: 0.78rem;
            padding: 0.15rem 0.6rem;
            border-radius: 999px;
            background: var(--surface-alt);
            color: var(--text-muted);
            font-weight: 500;
            transition: all var(--transition);
            cursor: default;
        }
        .news-tags .tag:hover {
            background: var(--primary);
            color: #fff;
        }
        .btn-read-more {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--primary);
            background: transparent;
            border: none;
            padding: 0;
            cursor: pointer;
            transition: color var(--transition);
        }
        .btn-read-more:hover {
            color: var(--primary-dark);
        }
        .btn-read-more i {
            font-size: 0.75rem;
            transition: transform var(--transition);
        }
        .btn-read-more:hover i {
            transform: translateX(3px);
        }
        .news-thumbnail {
            flex-shrink: 0;
            width: 180px;
            height: 120px;
            border-radius: 8px;
            overflow: hidden;
            margin-left: auto;
        }
        .news-thumbnail img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .topic-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.25rem;
            text-align: center;
            transition: box-shadow var(--transition), transform var(--transition);
            cursor: default;
        }
        .topic-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .topic-card .topic-icon {
            width: 48px;
            height: 48px;
            margin: 0 auto 0.75rem;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
            background: #EBF3FB;
        }
        .topic-card h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.35rem;
        }
        .topic-card p {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.5;
        }
        .deep-report-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: box-shadow var(--transition), transform var(--transition);
            height: 100%;
        }
        .deep-report-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .deep-report-card .report-img {
            height: 160px;
            overflow: hidden;
        }
        .deep-report-card .report-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .deep-report-card .report-body {
            padding: 1.25rem;
        }
        .deep-report-card .report-body h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }
        .deep-report-card .report-body p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 0.75rem;
            line-height: 1.6;
        }
        .deep-report-card .report-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .archive-list {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 1.5rem;
        }
        .archive-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.75rem 0;
            border-bottom: 1px solid var(--border);
            transition: color var(--transition);
        }
        .archive-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .archive-item:first-child {
            padding-top: 0;
        }
        .archive-item .archive-label {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
        }
        .archive-item .archive-count {
            font-size: 0.8rem;
            color: var(--text-muted);
            background: var(--surface-alt);
            padding: 0.2rem 0.6rem;
            border-radius: 999px;
        }
        .archive-item a {
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex: 1;
        }
        .archive-item a:hover {
            color: var(--primary);
        }
        .subscription-box {
            background: linear-gradient(135deg, #EAF2FB 0%, #F3EFFE 100%);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 2rem;
            display: flex;
            align-items: center;
            gap: 2rem;
            flex-wrap: wrap;
        }
        .subscription-box .sub-info {
            flex: 1;
            min-width: 260px;
        }
        .subscription-box .sub-info h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
        }
        .subscription-box .sub-info p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .subscription-form {
            display: flex;
            gap: 0.75rem;
            flex: 1;
            min-width: 260px;
            flex-wrap: wrap;
        }
        .subscription-form input[type="email"] {
            flex: 1;
            min-width: 200px;
            padding: 0.5rem 1rem;
            border: 1px solid var(--border);
            border-radius: var(--radius-button);
            background: var(--surface);
            color: var(--text);
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .subscription-form input[type="email"]:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(43, 108, 176, 0.1);
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: var(--primary);
            color: #fff;
            border: 1px solid var(--primary);
            border-radius: var(--radius-button);
            padding: 0.5rem 1.25rem;
            font-size: 0.9rem;
            font-weight: 500;
            cursor: pointer;
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
            white-space: nowrap;
        }
        .btn-primary-custom:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
        }
        .btn-primary-custom:active {
            transform: scale(0.98);
        }
        .btn-secondary-custom {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: var(--surface);
            color: var(--text);
            border: 1px solid var(--border);
            border-radius: var(--radius-button);
            padding: 0.5rem 1.25rem;
            font-size: 0.9rem;
            font-weight: 500;
            cursor: pointer;
            transition: border-color var(--transition), color var(--transition), transform var(--transition);
            white-space: nowrap;
        }
        .btn-secondary-custom:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .btn-secondary-custom:active {
            transform: scale(0.98);
        }
        .cta-banner {
            background: linear-gradient(135deg, #DCE9FA 0%, #E5E0F8 100%);
            border-radius: var(--radius-card);
            padding: 2.5rem 2rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 2rem;
            flex-wrap: wrap;
            box-shadow: var(--shadow-card);
        }
        .cta-banner .cta-text h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.4rem;
        }
        .cta-banner .cta-text p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .cta-banner .cta-actions {
            display: flex;
            gap: 0.75rem;
            flex-wrap: wrap;
        }
        .site-footer {
            background: #1A202C;
            color: rgba(255, 255, 255, 0.7);
            padding-top: 3.5rem;
            padding-bottom: 1.5rem;
            margin-top: 3rem;
        }
        .site-footer h5 {
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }
        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.05rem;
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .site-footer .footer-brand .brand-icon {
            background: rgba(255, 255, 255, 0.08);
            color: #A5B4FC;
        }
        .site-footer .footer-desc {
            font-size: 0.85rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 300px;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 0.4rem;
        }
        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
            transition: color var(--transition);
        }
        .site-footer .footer-links a:hover {
            color: #fff;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 2rem;
            padding-top: 1rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.55);
        }
        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition);
        }
        .site-footer .footer-bottom a:hover {
            color: #fff;
        }
        @media (max-width: 991px) {
            .news-thumbnail {
                width: 140px;
                height: 100px;
            }
            .news-list-item {
                gap: 1rem;
            }
        }
        @media (max-width: 767px) {
            .news-list-item {
                flex-direction: column;
                gap: 0.75rem;
            }
            .news-date {
                width: 100%;
                flex-direction: row;
                gap: 0.5rem;
                justify-content: flex-start;
                padding: 0.5rem 0.75rem;
            }
            .news-date .day {
                font-size: 1.2rem;
            }
            .news-date .month-year {
                margin-top: 0;
            }
            .news-thumbnail {
                width: 100%;
                height: 160px;
                margin-left: 0;
                margin-top: 0.5rem;
            }
            .news-list-item {
                padding: 1.25rem;
            }
            .subscription-box {
                padding: 1.5rem;
                gap: 1.5rem;
            }
            .cta-banner {
                padding: 1.75rem 1.25rem;
            }
            section {
                padding-top: 2.5rem;
                padding-bottom: 2.5rem;
            }
            .breadcrumb-section {
                padding-top: 2rem;
                padding-bottom: 2rem;
            }
        }
        @media (max-width: 575px) {
            .news-date .day {
                font-size: 1.1rem;
            }
            .news-content h3 {
                font-size: 1rem;
            }
            .topic-card .topic-icon {
                width: 40px;
                height: 40px;
                font-size: 1.2rem;
            }
            .subscription-form input[type="email"] {
                min-width: 100%;
            }
            .btn-primary-custom,
            .btn-secondary-custom {
                width: 100%;
                justify-content: center;
            }
            .cta-banner .cta-actions {
                width: 100%;
            }
            .cta-banner .cta-actions .btn-primary-custom,
            .cta-banner .cta-actions .btn-secondary-custom {
                flex: 1;
            }
        }

/* roulang page: category6 */
:root {
            --primary: #2B6CB0;
            --primary-dark: #1E4F80;
            --secondary: #6C5CE7;
            --accent: #F97316;
            --bg: #F7F9FC;
            --surface: #FFFFFF;
            --surface-alt: #EEF2F7;
            --text: #1A202C;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --success: #22C55E;
            --danger: #EF4444;
            --radius-card: 12px;
            --radius-button: 8px;
            --shadow-card: 0 2px 8px rgba(26, 32, 44, 0.06), 0 8px 24px rgba(26, 32, 44, 0.05);
            --shadow-hover: 0 4px 12px rgba(26, 32, 44, 0.08), 0 12px 32px rgba(26, 32, 44, 0.08);
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --transition: 200ms ease;
        }

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

        body {
            font-family: var(--font-family);
            font-size: 0.95rem;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

        .container {
            max-width: 1140px;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        section {
            padding-top: 3.5rem;
            padding-bottom: 3.5rem;
        }

        .section-alt {
            background-color: var(--surface-alt);
        }

        .section-title {
            font-size: clamp(1.3rem, 2vw, 1.6rem);
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.75rem;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 2rem;
            max-width: 720px;
            line-height: 1.7;
        }

        /* Header & Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            min-height: 64px;
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 2px 16px rgba(26, 32, 44, 0.08);
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text);
            white-space: nowrap;
        }

        .navbar-brand:hover {
            color: var(--primary);
        }

        .brand-icon {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #EDE9FE 0%, #F1F5F9 100%);
            border-radius: 8px;
            color: var(--secondary);
        }

        .brand-icon svg {
            width: 22px;
            height: 22px;
        }

        .navbar {
            padding-top: 0.5rem;
            padding-bottom: 0.5rem;
        }

        .navbar-nav .nav-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            padding-left: 0.9rem;
            padding-right: 0.9rem;
            transition: color var(--transition);
            white-space: nowrap;
            position: relative;
        }

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

        .navbar-nav .nav-link.active {
            color: var(--primary);
        }

        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0.9rem;
            right: 0.9rem;
            bottom: 0.2rem;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .status-chips {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            margin-left: 0.5rem;
        }

        .chip {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            font-size: 0.8rem;
            padding: 0.15rem 0.6rem;
            border-radius: 999px;
            white-space: nowrap;
            font-weight: 500;
            line-height: 1.5;
            border: 1px solid transparent;
            cursor: default;
        }

        .chip-warmup {
            background: var(--surface);
            border-color: #C4D3E8;
            color: #4A6FA5;
        }

        .chip-live {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            position: relative;
        }

        .chip-live::before {
            content: '';
            width: 6px;
            height: 6px;
            background: #fff;
            border-radius: 50%;
            animation: pulse-dot 1.6s ease-in-out infinite;
            flex-shrink: 0;
        }

        .chip-replay {
            background: #F3EFFE;
            color: #5B4BC4;
            border-color: #D8CFF5;
        }

        .navbar-toggler {
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 0.35rem 0.6rem;
            background: var(--surface);
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(26, 32, 44, 0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(0.7); }
        }

        /* Page Hero Banner (narrow) */
        .page-hero {
            background: linear-gradient(135deg, #EAF2FB 0%, #F1EEFE 100%);
            padding: 4rem 0 3rem;
            border-bottom: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(108, 92, 231, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-hero .breadcrumb {
            margin-bottom: 1rem;
            font-size: 0.85rem;
            color: var(--text-muted);
            background: transparent;
            padding: 0;
        }

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

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

        .page-hero .breadcrumb .active {
            color: var(--primary);
        }

        .page-hero h1 {
            font-size: clamp(1.5rem, 2.4vw, 2rem);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.3;
        }

        .page-hero .hero-subtitle {
            font-size: 0.95rem;
            color: var(--text-muted);
            max-width: 560px;
            line-height: 1.7;
        }

        .hero-badge-row {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
            margin-top: 1rem;
        }

        /* Membership Package Cards */
        .pricing-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition);
            height: 100%;
            position: relative;
        }

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

        .pricing-card.popular {
            border-color: var(--primary);
            box-shadow: 0 4px 16px rgba(43, 108, 176, 0.12), 0 12px 32px rgba(26, 32, 44, 0.06);
        }

        .pricing-card .popular-badge {
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: var(--primary);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.7rem;
            border-radius: 999px;
            letter-spacing: 0.02em;
        }

        .pricing-card .pricing-header {
            padding: 1.5rem 1.5rem 1rem;
            border-bottom: 1px solid var(--border);
        }

        .pricing-card .plan-name {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.3rem;
        }

        .pricing-card .price {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.2;
        }

        .pricing-card .price .currency {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-muted);
        }

        .pricing-card .price-note {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 0.25rem;
        }

        .pricing-card .plan-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-top: 0.5rem;
        }

        .pricing-card .pricing-features {
            padding: 1.25rem 1.5rem 1.5rem;
            list-style: none;
            margin: 0;
        }

        .pricing-card .pricing-features li {
            padding: 0.45rem 0;
            font-size: 0.9rem;
            color: var(--text);
            display: flex;
            align-items: flex-start;
            gap: 0.5rem;
            line-height: 1.6;
        }

        .pricing-card .pricing-features li i {
            color: var(--success);
            flex-shrink: 0;
            margin-top: 0.2rem;
            font-size: 0.9rem;
        }

        .pricing-card .pricing-features li.disabled {
            color: var(--text-muted);
        }

        .pricing-card .pricing-features li.disabled i {
            color: #CBD5E1;
        }

        .pricing-card .pricing-action {
            padding: 0 1.5rem 1.5rem;
        }

        .btn-primary-custom {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 0.6rem 1.5rem;
            border-radius: var(--radius-button);
            font-weight: 500;
            font-size: 0.9rem;
            transition: background var(--transition), transform var(--transition);
            display: inline-block;
            text-align: center;
        }

        .btn-primary-custom:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
        }

        .btn-outline-custom {
            background: var(--surface);
            color: var(--text);
            border: 1px solid var(--border);
            padding: 0.6rem 1.5rem;
            border-radius: var(--radius-button);
            font-weight: 500;
            font-size: 0.9rem;
            transition: border-color var(--transition), color var(--transition), transform var(--transition);
            display: inline-block;
            text-align: center;
        }

        .btn-outline-custom:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-1px);
        }

        /* Benefits Grid */
        .benefit-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 1.5rem;
            height: 100%;
            transition: transform var(--transition), box-shadow var(--transition);
        }

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

        .benefit-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 1rem;
            background: #EAF2FB;
            color: var(--primary);
        }

        .benefit-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
        }

        .benefit-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
        }

        /* Exclusive Content */
        .exclusive-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .exclusive-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 1rem 1.25rem;
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .exclusive-item:hover {
            box-shadow: var(--shadow-card);
            transform: translateX(4px);
        }

        .exclusive-item .exclusive-thumb {
            width: 64px;
            height: 44px;
            border-radius: 8px;
            object-fit: cover;
            flex-shrink: 0;
        }

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

        .exclusive-item .exclusive-info h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text);
            margin: 0 0 0.25rem;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .exclusive-item .exclusive-info p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .exclusive-item .exclusive-tag {
            font-size: 0.75rem;
            padding: 0.2rem 0.6rem;
            border-radius: 999px;
            background: #F3EFFE;
            color: #5B4BC4;
            white-space: nowrap;
            flex-shrink: 0;
        }

        /* Comparison Table */
        .comparison-table-wrapper {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
        }

        .comparison-table th,
        .comparison-table td {
            padding: 1rem 1.25rem;
            text-align: center;
            border-bottom: 1px solid var(--border);
        }

        .comparison-table th {
            background: var(--surface-alt);
            font-weight: 600;
            color: var(--text);
            white-space: nowrap;
        }

        .comparison-table th:first-child,
        .comparison-table td:first-child {
            text-align: left;
            font-weight: 500;
            color: var(--text);
        }

        .comparison-table td {
            color: var(--text-muted);
        }

        .comparison-table .feature-included {
            color: var(--primary);
            font-weight: 600;
        }

        .comparison-table .feature-excluded {
            color: #CBD5E1;
        }

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

        /* Stats */
        .stat-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 1.5rem;
            text-align: center;
            height: 100%;
            transition: transform var(--transition), box-shadow var(--transition);
        }

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

        .stat-number {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 0.3rem;
        }

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

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, #EAF2FB 0%, #F1EEFE 100%);
            border-radius: var(--radius-card);
            padding: 2.5rem 2rem;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(108, 92, 231, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.75rem;
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            font-size: 0.95rem;
            color: var(--text-muted);
            max-width: 560px;
            line-height: 1.7;
            margin-bottom: 1.5rem;
            position: relative;
            z-index: 1;
        }

        .cta-section .btn {
            position: relative;
            z-index: 1;
        }

        /* Footer */
        .site-footer {
            background: #1A202C;
            color: #CBD5E1;
            padding: 3rem 0 1.5rem;
            margin-top: 3rem;
        }

        .site-footer .footer-brand {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 1rem;
        }

        .site-footer .footer-brand .brand-icon {
            background: rgba(108, 92, 231, 0.25);
            color: #A5B4FC;
        }

        .site-footer .footer-desc {
            font-size: 0.85rem;
            color: #94A3B8;
            line-height: 1.7;
            max-width: 320px;
        }

        .site-footer h5 {
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
        }

        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer .footer-links li {
            margin-bottom: 0.5rem;
        }

        .site-footer .footer-links a {
            font-size: 0.85rem;
            color: #94A3B8;
            transition: color var(--transition);
        }

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

        .site-footer .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem 1.5rem;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 1.5rem;
            margin-top: 2rem;
            font-size: 0.85rem;
            color: #94A3B8;
        }

        .site-footer .footer-bottom a {
            color: #94A3B8;
        }

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

        /* Responsive */
        @media (max-width: 991px) {
            .status-chips {
                margin-left: 0;
                margin-top: 0.5rem;
                flex-wrap: wrap;
            }

            .navbar-collapse {
                padding-bottom: 0.75rem;
            }

            .page-hero {
                padding: 3rem 0 2rem;
            }
        }

        @media (max-width: 768px) {
            section {
                padding-top: 2.5rem;
                padding-bottom: 2.5rem;
            }

            .pricing-card .price {
                font-size: 1.6rem;
            }

            .comparison-table-wrapper {
                overflow-x: auto;
            }

            .comparison-table {
                min-width: 560px;
            }

            .exclusive-item {
                flex-wrap: wrap;
            }

            .stat-number {
                font-size: 1.5rem;
            }

            .cta-section {
                padding: 2rem 1.5rem;
            }

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

        @media (max-width: 576px) {
            .page-hero h1 {
                font-size: 1.4rem;
            }

            .pricing-card .pricing-header {
                padding: 1.25rem 1.25rem 0.75rem;
            }

            .pricing-card .pricing-features {
                padding: 1rem 1.25rem 1.25rem;
            }

            .pricing-card .pricing-action {
                padding: 0 1.25rem 1.25rem;
            }

            .btn-primary-custom,
            .btn-outline-custom {
                display: block;
                width: 100%;
                padding: 0.6rem 1rem;
            }

            .benefit-card {
                padding: 1.25rem;
            }

            .cta-section h2 {
                font-size: 1.2rem;
            }
        }

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