/* roulang page: index */
:root {
            --primary: #2F54EB;
            --primary-dark: #1D3FBF;
            --primary-light: #EAF0FE;
            --accent: #16C8D8;
            --accent-soft: #E6F9FB;
            --dark-bg: #1B2B46;
            --dark-bg-2: #24354F;
            --bg: #F5F7FB;
            --bg-alt: #F8FAFD;
            --surface: #FFFFFF;
            --text: #1A1F36;
            --text-secondary: #4A5578;
            --text-muted: #7A86A8;
            --border: #E4ECF5;
            --border-hover: #C5D4F0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(47, 84, 235, 0.05);
            --shadow-md: 0 8px 24px rgba(47, 84, 235, 0.06);
            --shadow-lg: 0 16px 40px rgba(47, 84, 235, 0.10);
            --shadow-hover: 0 12px 32px rgba(47, 84, 235, 0.14);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --section-pad: 80px 0;
            --section-pad-mobile: 44px 0;
            --transition: all 0.25s ease;
            --transition-slow: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

        button,
        input,
        select,
        textarea {
            font-family: var(--font-sans);
            font-size: 1rem;
            outline: none;
            border: none;
        }

        button {
            cursor: pointer;
            background: none;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(22, 200, 216, 0.5);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            background: var(--primary-light);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 16px;
            border: 1px solid rgba(47, 84, 235, 0.12);
        }

        .section-label .dot {
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            display: inline-block;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.35;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 720px;
            margin-bottom: 40px;
        }

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

        .section-header-centered {
            text-align: center;
            max-width: 780px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== Top Promo Bar ========== */
        .promo-bar {
            background: var(--dark-bg);
            color: #fff;
            font-size: 13px;
            padding: 8px 0;
            position: relative;
            z-index: 1001;
            overflow: hidden;
        }

        .promo-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .promo-bar-text {
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .promo-bar-text .icon {
            color: var(--accent);
            font-size: 14px;
            flex-shrink: 0;
        }

        .promo-bar-link {
            color: var(--accent);
            font-weight: 600;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .promo-bar-link:hover {
            color: #fff;
            text-decoration: underline;
        }

        /* ========== Main Header / Nav ========== */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 12px rgba(47, 84, 235, 0.04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            height: 68px;
        }

        .logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
            letter-spacing: -0.02em;
        }

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

        .logo .logo-mark {
            width: 34px;
            height: 34px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: 20px;
        }

        .main-nav a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
            position: relative;
        }

        .main-nav a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .main-nav a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: var(--radius-full);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .icon-btn {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border);
            background: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            transition: var(--transition);
            font-size: 16px;
        }

        .icon-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }

        .icon-btn:active {
            transform: scale(0.95);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: var(--transition);
            white-space: nowrap;
            line-height: 1.4;
            text-decoration: none;
            cursor: pointer;
            border: 2px solid transparent;
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

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

        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-secondary:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary-dark);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }

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

        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }

        .btn-accent:hover {
            background: #0FA8B8;
            border-color: #0FA8B8;
            color: #fff;
            box-shadow: 0 8px 20px rgba(22, 200, 216, 0.35);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
            border-radius: var(--radius-sm);
        }

        .btn-lg {
            padding: 14px 28px;
            font-size: 16px;
            border-radius: var(--radius-md);
        }

        .btn-block {
            width: 100%;
        }

        .btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        /* Mobile hamburger */
        .hamburger {
            display: none;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: #fff;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            transition: var(--transition);
        }

        .hamburger span {
            display: block;
            width: 18px;
            height: 2px;
            background: var(--text-secondary);
            border-radius: 2px;
            transition: var(--transition);
        }

        .hamburger:hover {
            border-color: var(--primary);
            background: var(--primary-light);
        }

        .hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }

        .hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Mobile drawer */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(26, 31, 54, 0.5);
            z-index: 999;
            backdrop-filter: blur(4px);
        }

        .mobile-nav-overlay.active {
            display: block;
        }

        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -320px;
            width: 280px;
            height: 100vh;
            background: #fff;
            z-index: 1000;
            box-shadow: -8px 0 32px rgba(26, 31, 54, 0.15);
            transition: right 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            display: flex;
            flex-direction: column;
            padding: 20px;
            gap: 12px;
        }

        .mobile-drawer.open {
            right: 0;
        }

        .mobile-drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--border);
        }

        .mobile-drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            padding-top: 12px;
        }

        .mobile-drawer-nav a {
            font-size: 16px;
            font-weight: 500;
            padding: 12px 14px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
        }

        .mobile-drawer-nav a:hover,
        .mobile-drawer-nav a.active {
            background: var(--primary-light);
            color: var(--primary);
        }

        .mobile-drawer-actions {
            margin-top: auto;
            display: flex;
            flex-direction: column;
            gap: 8px;
            padding-top: 16px;
            border-top: 1px solid var(--border);
        }

        /* ========== Hero Section ========== */
        .hero {
            position: relative;
            min-height: 620px;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: var(--dark-bg);
            isolation: isolate;
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: -2;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(27, 43, 70, 0.92) 0%, rgba(47, 84, 235, 0.72) 55%, rgba(22, 200, 216, 0.30) 100%);
            z-index: -1;
        }

        .hero-content {
            position: relative;
            color: #fff;
            max-width: 640px;
            padding: 80px 0;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: #fff;
            background: rgba(255, 255, 255, 0.14);
            border: 1px solid rgba(255, 255, 255, 0.22);
            backdrop-filter: blur(8px);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 20px;
        }

        .hero-tag .dot {
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            display: inline-block;
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.6);
            }
        }

        .hero h1 {
            font-size: 38px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 18px;
            letter-spacing: -0.02em;
            color: #fff;
        }

        .hero h1 .highlight {
            color: var(--accent);
            position: relative;
        }

        .hero-desc {
            font-size: 16px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.82);
            margin-bottom: 28px;
            max-width: 540px;
        }

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

        .hero-buttons .btn {
            border-radius: var(--radius-md);
        }

        .btn-on-dark {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.35);
            backdrop-filter: blur(8px);
        }

        .btn-on-dark:hover {
            background: rgba(255, 255, 255, 0.22);
            border-color: rgba(255, 255, 255, 0.55);
            color: #fff;
            transform: translateY(-2px);
        }

        .hero-countdown {
            display: flex;
            gap: 20px;
            margin-top: 30px;
            flex-wrap: wrap;
        }

        .countdown-item {
            text-align: center;
            min-width: 58px;
        }

        .countdown-number {
            font-size: 26px;
            font-weight: 800;
            color: #fff;
            background: rgba(255, 255, 255, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.22);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
            display: inline-block;
            min-width: 56px;
        }

        .countdown-label {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 4px;
            letter-spacing: 0.06em;
        }

        /* ========== Generic Sections ========== */
        .section {
            padding: var(--section-pad);
        }

        .section-alt {
            background: var(--bg-alt);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

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

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

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

        .card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            transition: var(--transition-slow);
            overflow: hidden;
        }

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

        .card-body {
            padding: 22px;
        }

        .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
            color: var(--text);
        }

        .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 12px;
        }

        .card-img-top {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: #E8EEF8;
        }

        .tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            margin-right: 6px;
            margin-bottom: 6px;
            letter-spacing: 0.02em;
        }

        .tag-blue {
            background: var(--primary-light);
            color: var(--primary);
        }

        .tag-cyan {
            background: var(--accent-soft);
            color: #0A9FB0;
        }

        .tag-dark {
            background: var(--dark-bg);
            color: #fff;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-full);
        }

        .badge-live {
            background: #FEF3F2;
            color: #C0392B;
            border: 1px solid #FADBD8;
        }

        .badge-updated {
            background: var(--accent-soft);
            color: #0A9FB0;
        }

        .stat-number {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ========== Pain / Solution sections ========== */
        .pain-card {
            background: #fff;
            border-left: 3px solid #FF6B6B;
            padding: 24px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            box-shadow: var(--shadow-sm);
            border-top: 1px solid var(--border);
            border-right: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .pain-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text);
        }

        .pain-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        .solution-card {
            background: #fff;
            border-left: 3px solid var(--primary);
            padding: 24px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            box-shadow: var(--shadow-sm);
            border-top: 1px solid var(--border);
            border-right: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .solution-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text);
        }

        .solution-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ========== Steps ========== */
        .step-item {
            position: relative;
            padding-left: 56px;
            padding-bottom: 28px;
        }

        .step-item:last-child {
            padding-bottom: 0;
        }

        .step-number {
            position: absolute;
            left: 0;
            top: 0;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-full);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 15px;
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ========== Data / metrics ========== */
        .metrics-row {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
            align-items: center;
        }

        .metric-item {
            flex: 1;
            min-width: 150px;
            text-align: center;
            padding: 20px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }

        /* ========== Testimonial ========== */
        .testimonial-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-sm);
        }

        .testimonial-card blockquote {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 14px;
            font-style: normal;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .testimonial-avatar {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-full);
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
        }

        .testimonial-name {
            font-weight: 600;
            font-size: 14px;
            color: var(--text);
        }

        .testimonial-role {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ========== Info cards / article list ========== */
        .article-card {
            display: flex;
            flex-direction: column;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition-slow);
        }

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

        .article-card img {
            border-radius: 0;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: #E8EEF8;
        }

        .article-card .card-body {
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .article-card .card-body h3 {
            font-size: 16px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 8px;
        }

        .article-card .card-body p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
        }

        .article-meta {
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 10px;
        }

        .article-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .article-link:hover {
            color: var(--primary-dark);
            gap: 8px;
        }

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

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

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: #fff;
            cursor: pointer;
            border: none;
            transition: var(--transition);
        }

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

        .faq-question .faq-toggle {
            font-size: 20px;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 20px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.85;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }

        .faq-item.open .faq-toggle {
            transform: rotate(45deg);
            color: var(--primary);
        }

        /* ========== CTA Section ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary) 100%);
            border-radius: var(--radius-xl);
            padding: 56px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: repeating-linear-gradient(45deg, transparent, transparent 20px, rgba(255, 255, 255, 0.02) 20px, rgba(255, 255, 255, 0.02) 40px);
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
            position: relative;
        }

        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.82);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.85;
            position: relative;
        }

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

        /* ========== Footer ========== */
        .site-footer {
            background: var(--dark-bg);
            color: rgba(255, 255, 255, 0.75);
            padding: 48px 0 0;
            margin-top: 80px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }

        .footer-brand .logo-mark {
            width: 28px;
            height: 28px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 13px;
            font-weight: 700;
        }

        .footer-desc {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.04em;
        }

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

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

        .footer-col ul a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }

        .footer-col ul a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-bottom {
            padding: 20px 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 12px;
        }

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

        .footer-bottom .sep {
            margin: 0 8px;
        }

        .footer-legal {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }

        /* ========== Cards with images ========== */
        .image-card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .image-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition-slow);
        }

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

        .image-card .card-img-top {
            border-radius: 0;
        }

        .image-card .card-body {
            padding: 18px;
        }

        .image-card .card-body h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .image-card .card-body p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ========== Brand intro section ========== */
        .brand-intro {
            display: flex;
            gap: 40px;
            align-items: center;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-xl);
            padding: 40px;
            box-shadow: var(--shadow-md);
        }

        .brand-intro-content {
            flex: 1;
        }

        .brand-intro-content h2 {
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .brand-intro-content p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 14px;
        }

        .brand-intro-img {
            flex-shrink: 0;
            width: 300px;
            border-radius: var(--radius-lg);
            overflow: hidden;
        }

        .brand-intro-img img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .image-card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .brand-intro {
                flex-direction: column;
                text-align: center;
            }
            .brand-intro-img {
                width: 100%;
                max-width: 400px;
            }
            .hero h1 {
                font-size: 32px;
            }
            .header-inner {
                gap: 16px;
            }
        }

        @media (max-width: 768px) {
            body {
                font-size: 15px;
            }
            .section {
                padding: var(--section-pad-mobile);
            }
            .section-title {
                font-size: 22px;
            }
            .hero {
                min-height: auto;
                padding: 40px 0;
            }
            .hero h1 {
                font-size: 26px;
            }
            .hero-desc {
                font-size: 15px;
            }
            .hero-countdown {
                gap: 12px;
            }
            .countdown-number {
                font-size: 20px;
                min-width: 44px;
                padding: 6px 8px;
            }
            .grid-2,
            .grid-3,
            .grid-4,
            .image-card-grid {
                grid-template-columns: 1fr;
            }
            .main-nav {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .header-inner {
                height: 58px;
            }
            .logo {
                font-size: 18px;
            }
            .logo .logo-mark {
                width: 28px;
                height: 28px;
                font-size: 13px;
            }
            .promo-bar {
                font-size: 11px;
            }
            .promo-bar .container {
                gap: 8px;
            }
            .promo-bar-text {
                white-space: normal;
            }
            .promo-bar-link {
                display: none;
            }
            .metrics-row {
                gap: 14px;
            }
            .metric-item {
                min-width: 100px;
                padding: 14px;
            }
            .stat-number {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
            .cta-section {
                padding: 36px 20px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .brand-intro {
                padding: 24px;
            }
            .brand-intro-content h2 {
                font-size: 20px;
            }
            .hero-buttons {
                flex-direction: column;
                gap: 10px;
            }
            .hero-buttons .btn {
                width: 100%;
            }
            .hero-content {
                padding: 40px 0;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .section-header {
                margin-bottom: 28px;
            }
            .section-title {
                font-size: 20px;
            }
            .hero h1 {
                font-size: 22px;
            }
            .hero-tag {
                font-size: 11px;
                padding: 4px 12px;
            }
            .btn {
                padding: 10px 18px;
                font-size: 14px;
            }
            .btn-lg {
                padding: 12px 20px;
                font-size: 15px;
            }
            .stat-number {
                font-size: 20px;
            }
            .card-body {
                padding: 16px;
            }
            .testimonial-card {
                padding: 18px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 14px;
            }
            .faq-answer {
                font-size: 13px;
            }
            .countdown-item {
                min-width: 44px;
            }
            .countdown-number {
                font-size: 17px;
                min-width: 38px;
                padding: 4px 6px;
            }
            .countdown-label {
                font-size: 10px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2F54EB;
            --primary-dark: #1D3FBF;
            --primary-light: #EAF0FE;
            --accent: #16C8D8;
            --accent-soft: #E6F9FB;
            --dark-bg: #1B2B46;
            --dark-bg-2: #24354F;
            --bg: #F5F7FB;
            --bg-alt: #F8FAFD;
            --surface: #FFFFFF;
            --text: #1A1F36;
            --text-secondary: #4A5578;
            --text-muted: #7A86A8;
            --border: #E4ECF5;
            --border-hover: #C5D4F0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(47, 84, 235, 0.05);
            --shadow-md: 0 8px 24px rgba(47, 84, 235, 0.06);
            --shadow-lg: 0 16px 40px rgba(47, 84, 235, 0.10);
            --shadow-hover: 0 12px 32px rgba(47, 84, 235, 0.14);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --section-pad: 80px 0;
            --section-pad-mobile: 44px 0;
            --transition: all 0.25s ease;
            --transition-slow: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        button,
        input,
        select,
        textarea {
            font-family: var(--font-sans);
            font-size: 1rem;
            outline: none;
            border: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 3px solid rgba(22, 200, 216, 0.5);
            outline-offset: 2px;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            background: var(--primary-light);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 16px;
            border: 1px solid rgba(47, 84, 235, 0.12);
        }
        .section-label .dot {
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            display: inline-block;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.35;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 720px;
            margin-bottom: 40px;
        }
        .section-header {
            margin-bottom: 48px;
        }
        .section-header-centered {
            text-align: center;
            max-width: 780px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 22px;
            border-radius: 10px;
            transition: var(--transition);
            border: 1px solid transparent;
            white-space: nowrap;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .btn-secondary {
            background: #fff;
            color: var(--primary);
            border-color: var(--border-hover);
        }
        .btn-secondary:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            border-radius: var(--radius-full);
            background: var(--primary-light);
            color: var(--primary);
            white-space: nowrap;
        }
        .badge-accent {
            background: var(--accent-soft);
            color: #0b8995;
        }
        .promo-bar {
            background: var(--dark-bg);
            color: #EAF0FE;
            font-size: 13px;
            padding: 8px 0;
            min-height: 40px;
            display: flex;
            align-items: center;
        }
        .promo-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .promo-text {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .promo-text .dot-accent {
            width: 7px;
            height: 7px;
            background: var(--accent);
            border-radius: 50%;
            flex-shrink: 0;
        }
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 12px rgba(47, 84, 235, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            height: 68px;
        }
        .logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
            letter-spacing: -0.02em;
        }
        .logo:hover {
            color: var(--primary);
        }
        .logo .logo-mark {
            width: 34px;
            height: 34px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: 20px;
        }
        .main-nav a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .main-nav a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: auto;
        }
        .icon-btn {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            background: var(--bg-alt);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .icon-btn:hover {
            color: var(--primary);
            border-color: var(--border-hover);
            background: var(--primary-light);
        }
        .header-cta {
            margin-left: 4px;
        }
        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            border-radius: 10px;
            background: var(--bg-alt);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }
        .search-dropdown {
            position: relative;
        }
        .search-panel {
            position: absolute;
            right: 0;
            top: 52px;
            width: 300px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            padding: 16px;
            display: none;
            z-index: 10;
        }
        .search-panel.open {
            display: block;
        }
        .search-form {
            display: flex;
            gap: 8px;
        }
        .search-form input {
            flex: 1;
            height: 42px;
            padding: 0 14px;
            border: 1px solid var(--border);
            border-radius: 10px;
            background: var(--bg-alt);
            color: var(--text);
        }
        .search-form button {
            height: 42px;
            padding: 0 16px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            white-space: nowrap;
        }
        .search-form button:hover {
            background: var(--primary-dark);
        }
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: -100%;
            bottom: 0;
            width: 82%;
            max-width: 340px;
            background: #fff;
            z-index: 2000;
            padding: 24px 20px;
            flex-direction: column;
            gap: 24px;
            transition: right 0.3s ease;
            box-shadow: -12px 0 32px rgba(27, 43, 70, 0.12);
            overflow-y: auto;
        }
        .mobile-drawer.open {
            right: 0;
        }
        .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .drawer-close {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            border: 1px solid var(--border);
            background: var(--bg-alt);
            color: var(--text-secondary);
            font-size: 22px;
            line-height: 1;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .drawer-nav a {
            padding: 12px 14px;
            border-radius: 10px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-alt);
            transition: var(--transition);
        }
        .drawer-nav a:hover,
        .drawer-nav a.active {
            background: var(--primary-light);
            color: var(--primary);
        }
        .drawer-footer {
            margin-top: auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .overlay {
            position: fixed;
            inset: 0;
            background: rgba(27, 43, 70, 0.45);
            z-index: 1500;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }
        .overlay.show {
            opacity: 1;
            pointer-events: auto;
        }
        .breadcrumb {
            padding: 18px 0;
            color: var(--text-muted);
            font-size: 14px;
            background: var(--bg-alt);
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb .container {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--text-muted);
        }
        .category-hero {
            background: var(--bg-alt);
            border-bottom: 1px solid var(--border);
            padding: 40px 0;
        }
        .category-hero-inner {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .category-hero h1 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }
        .category-hero p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.85;
        }
        .category-hero-meta {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: center;
        }
        .category-hero-meta span {
            padding: 8px 14px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
        }
        .filter-bar {
            padding: 20px 0;
            background: #fff;
            border-bottom: 1px solid var(--border);
        }
        .filter-bar-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .filter-tabs {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-tab {
            padding: 8px 16px;
            border-radius: var(--radius-full);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-alt);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .filter-tab:hover {
            border-color: var(--border-hover);
            color: var(--primary);
        }
        .filter-tab.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .sort-box {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
        }
        .sort-box select {
            padding: 9px 14px;
            border-radius: 10px;
            border: 1px solid var(--border);
            background: var(--bg-alt);
            color: var(--text);
            font-size: 14px;
        }
        .news-list-section {
            padding: var(--section-pad);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition-slow);
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-hover);
        }
        .news-cover {
            display: block;
            height: 180px;
            overflow: hidden;
            background: #DCE5F2;
            border-radius: 0;
        }
        .news-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.5s ease;
        }
        .news-card:hover .news-cover img {
            transform: scale(1.05);
        }
        .news-card-body {
            padding: 18px 18px 20px;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .news-card-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
            color: var(--text);
        }
        .news-card-body h3 a {
            color: var(--text);
        }
        .news-card-body h3 a:hover {
            color: var(--primary);
        }
        .news-card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }
        .list-more {
            margin-top: 32px;
            display: flex;
            justify-content: center;
        }
        .stats-strip {
            background: var(--dark-bg);
            padding: 48px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item strong {
            display: block;
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-item span {
            font-size: 14px;
            color: #AAB7D4;
        }
        .editor-section {
            padding: var(--section-pad);
            background: var(--bg-alt);
        }
        .editor-grid {
            display: grid;
            grid-template-columns: 1.4fr 0.6fr;
            gap: 32px;
            align-items: center;
        }
        .editor-note {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: flex-end;
        }
        .topic-entry {
            padding: var(--section-pad);
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 28px;
        }
        .topic-card {
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 20px;
            transition: var(--transition);
        }
        .topic-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-md);
        }
        .topic-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .topic-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 14px;
        }
        .topic-card a {
            font-weight: 600;
            font-size: 14px;
        }
        .faq-section {
            padding: var(--section-pad);
            background: var(--bg-alt);
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 20px 22px;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-sm);
        }
        .faq-item h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .faq-item p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
        }
        .cta-section {
            padding: var(--section-pad);
            background: var(--bg-alt);
        }
        .cta-box {
            background: var(--dark-bg);
            color: #fff;
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            text-align: center;
            box-shadow: var(--shadow-lg);
        }
        .cta-box h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .cta-box p {
            color: #C0CDE5;
            font-size: 16px;
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }
        .site-footer {
            background: #fff;
            border-top: 1px solid var(--border);
            padding: 56px 0 20px;
            color: var(--text-secondary);
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .footer-brand .logo-mark {
            width: 30px;
            height: 30px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 14px;
            font-weight: 700;
        }
        .footer-desc {
            color: var(--text-muted);
            line-height: 1.85;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col li {
            margin-bottom: 10px;
        }
        .footer-col a {
            color: var(--text-secondary);
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            color: var(--text-muted);
            font-size: 13px;
        }
        .footer-bottom .sep {
            margin: 0 8px;
            color: var(--border-hover);
        }
        .footer-legal a {
            color: var(--text-muted);
        }
        .footer-legal a:hover {
            color: var(--primary);
        }
        @media (max-width: 1024px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .editor-grid {
                grid-template-columns: 1fr;
            }
            .editor-note {
                justify-content: flex-start;
            }
        }
        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }
            .header-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .header-actions .search-toggle {
                display: inline-flex;
            }
            .promo-bar .promo-secondary {
                display: none;
            }
            .header-inner {
                height: 60px;
            }
            .logo {
                font-size: 19px;
            }
            .logo .logo-mark {
                width: 30px;
                height: 30px;
                font-size: 14px;
            }
            .category-hero {
                padding: 28px 0;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .filter-bar-inner {
                flex-direction: column;
                align-items: flex-start;
            }
            .sort-box {
                width: 100%;
                justify-content: space-between;
            }
            .sort-box select {
                flex: 1;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .topic-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stats-strip {
                padding: 32px 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .cta-box {
                padding: 36px 20px;
            }
            .cta-box h2 {
                font-size: 22px;
            }
            .search-panel {
                width: 280px;
                right: -40px;
            }
            section,
            .news-list-section,
            .editor-section,
            .topic-entry,
            .faq-section,
            .cta-section {
                padding: var(--section-pad-mobile);
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-hero h1 {
                font-size: 24px;
            }
            .section-title {
                font-size: 23px;
            }
            .news-cover {
                height: 150px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .stat-item strong {
                font-size: 26px;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .mobile-drawer {
                width: 88%;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2F54EB;
            --primary-dark: #1D3FBF;
            --primary-light: #EAF0FE;
            --accent: #16C8D8;
            --accent-soft: #E6F9FB;
            --dark-bg: #1B2B46;
            --dark-bg-2: #24354F;
            --bg: #F5F7FB;
            --bg-alt: #F8FAFD;
            --surface: #FFFFFF;
            --text: #1A1F36;
            --text-secondary: #4A5578;
            --text-muted: #7A86A8;
            --border: #E4ECF5;
            --border-hover: #C5D4F0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(47, 84, 235, 0.05);
            --shadow-md: 0 8px 24px rgba(47, 84, 235, 0.06);
            --shadow-lg: 0 16px 40px rgba(47, 84, 235, 0.10);
            --shadow-hover: 0 12px 32px rgba(47, 84, 235, 0.14);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --section-pad: 80px 0;
            --section-pad-mobile: 44px 0;
            --transition: all 0.25s ease;
            --transition-slow: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        button,
        input,
        select,
        textarea {
            font-family: var(--font-sans);
            font-size: 1rem;
            outline: none;
            border: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(22, 200, 216, 0.5);
            outline-offset: 2px;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            background: var(--primary-light);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 16px;
            border: 1px solid rgba(47, 84, 235, 0.12);
        }
        .section-label .dot {
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            display: inline-block;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.35;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 720px;
            margin-bottom: 40px;
        }
        .section-header {
            margin-bottom: 48px;
        }
        .section-header-centered {
            text-align: center;
            max-width: 780px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== Promo Bar ========== */
        .promo-bar {
            background: var(--dark-bg);
            color: #fff;
            font-size: 13px;
            padding: 8px 0;
            position: relative;
            z-index: 1001;
            min-height: 36px;
            display: flex;
            align-items: center;
        }
        .promo-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .promo-bar .promo-text {
            font-weight: 400;
            letter-spacing: 0.02em;
            color: rgba(255, 255, 255, 0.92);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .promo-bar .promo-close {
            color: rgba(255, 255, 255, 0.7);
            font-size: 18px;
            line-height: 1;
            padding: 2px 6px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            flex-shrink: 0;
            cursor: pointer;
        }
        .promo-bar .promo-close:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.12);
        }

        /* ========== Main Header / Nav ========== */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 12px rgba(47, 84, 235, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            height: 68px;
        }
        .logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
            letter-spacing: -0.02em;
        }
        .logo:hover {
            color: var(--primary);
        }
        .logo .logo-mark {
            width: 34px;
            height: 34px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            margin-left: 16px;
            flex: 1;
        }
        .main-nav a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .main-nav a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .icon-btn {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            background: transparent;
            transition: var(--transition);
            font-size: 18px;
            position: relative;
            border: 1px solid transparent;
        }
        .icon-btn:hover {
            color: var(--primary);
            background: var(--primary-light);
            border-color: rgba(47, 84, 235, 0.1);
        }
        .icon-btn .badge-dot {
            position: absolute;
            top: 8px;
            right: 8px;
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
        }
        .header-cta {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            padding: 9px 18px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
            border: 1px solid var(--primary);
            cursor: pointer;
        }
        .header-cta:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            box-shadow: 0 4px 12px rgba(47, 84, 235, 0.25);
        }
        .hamburger {
            display: none;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 4px;
            color: var(--text);
            background: transparent;
            border: 1px solid var(--border);
            cursor: pointer;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .hamburger span {
            display: block;
            width: 18px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }
        .hamburger:hover {
            border-color: var(--primary);
            background: var(--primary-light);
        }
        .hamburger:hover span {
            background: var(--primary);
        }
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: -320px;
            width: 300px;
            height: 100vh;
            background: #fff;
            box-shadow: -8px 0 32px rgba(0, 0, 0, 0.08);
            z-index: 9999;
            transition: right 0.3s ease;
            overflow-y: auto;
            padding: 24px 20px;
        }
        .mobile-drawer.open {
            right: 0;
        }
        .mobile-drawer .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--border);
        }
        .mobile-drawer .drawer-header .logo {
            font-size: 18px;
        }
        .mobile-drawer .drawer-close {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 20px;
            cursor: pointer;
            transition: var(--transition);
            border: 1px solid var(--border);
            background: transparent;
        }
        .mobile-drawer .drawer-close:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .mobile-drawer .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            margin-bottom: 24px;
        }
        .mobile-drawer .drawer-nav a {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .mobile-drawer .drawer-nav a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .mobile-drawer .drawer-nav a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .mobile-drawer .drawer-cta {
            display: block;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            padding: 12px;
            border-radius: var(--radius-sm);
            text-align: center;
            transition: var(--transition);
            cursor: pointer;
        }
        .mobile-drawer .drawer-cta:hover {
            background: var(--primary-dark);
            color: #fff;
        }
        .overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 9998;
            transition: opacity 0.3s ease;
        }
        .overlay.show {
            display: block;
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb-bar {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb-bar .container {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .breadcrumb-bar a {
            color: var(--primary);
            font-weight: 500;
        }
        .breadcrumb-bar a:hover {
            color: var(--primary-dark);
        }
        .breadcrumb-bar .sep {
            color: var(--text-muted);
            font-size: 12px;
        }
        .breadcrumb-bar .current {
            color: var(--text);
            font-weight: 500;
        }

        /* ========== Category Page Header ========== */
        .category-header {
            background: linear-gradient(135deg, #F8FAFD 0%, #EAF0FE 100%);
            border-bottom: 1px solid var(--border);
            padding: 48px 0 40px;
            position: relative;
            overflow: hidden;
        }
        .category-header::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(22, 200, 216, 0.08) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-header::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -3%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(47, 84, 235, 0.06) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-header .container {
            position: relative;
            z-index: 1;
        }
        .category-header h1 {
            font-size: 32px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
            margin: 0 0 12px;
            letter-spacing: -0.02em;
        }
        .category-header .cat-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 720px;
            margin: 0;
        }

        /* ========== Filter / Sort Bar ========== */
        .filter-bar {
            padding: 20px 0 0;
            background: transparent;
        }
        .filter-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 14px 20px;
            box-shadow: var(--shadow-sm);
        }
        .filter-tags {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-tag {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 7px 16px;
            border-radius: var(--radius-full);
            background: var(--bg);
            border: 1px solid var(--border);
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }
        .filter-tag:hover {
            color: var(--primary);
            border-color: var(--primary);
            background: var(--primary-light);
        }
        .filter-tag.active {
            color: #fff;
            background: var(--primary);
            border-color: var(--primary);
            font-weight: 600;
        }
        .filter-sort {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
        }
        .filter-sort select {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 7px 12px;
            font-size: 14px;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition);
            min-width: 120px;
        }
        .filter-sort select:hover,
        .filter-sort select:focus {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* ========== Article List ========== */
        .article-list-section {
            padding: 36px 0 48px;
            background: transparent;
        }
        .article-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            margin-bottom: 32px;
        }
        .article-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: var(--transition-slow);
            cursor: pointer;
        }
        .article-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
        }
        .article-card .card-img {
            aspect-ratio: 16/9;
            background: var(--bg-alt);
            overflow: hidden;
            position: relative;
        }
        .article-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
        }
        .article-card .card-img .img-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            letter-spacing: 0.04em;
        }
        .article-card .card-body {
            padding: 20px 22px 22px;
        }
        .article-card .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.45;
            margin: 0 0 10px;
            letter-spacing: -0.01em;
            transition: var(--transition);
        }
        .article-card:hover .card-title {
            color: var(--primary);
        }
        .article-card .card-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin: 0 0 16px;
            overflow: hidden;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }
        .article-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
            padding-top: 14px;
            border-top: 1px solid var(--border);
        }
        .article-card .card-meta .meta-author {
            color: var(--text-secondary);
            font-weight: 500;
        }
        .article-card .card-meta .meta-sep {
            width: 3px;
            height: 3px;
            background: var(--text-muted);
            border-radius: 50%;
        }
        .list-more-wrap {
            text-align: center;
        }
        .list-more-btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--primary);
            cursor: pointer;
            transition: var(--transition);
        }
        .list-more-btn:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary-dark);
            box-shadow: var(--shadow-sm);
        }
        .list-more-btn .arrow {
            font-size: 18px;
            line-height: 1;
        }

        /* ========== Stats / Dark Section ========== */
        .stats-section {
            padding: 64px 0;
            background: var(--dark-bg);
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/67fb5387b769a046.webp') center/cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .stats-section .container {
            position: relative;
            z-index: 1;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            padding: 24px 16px;
            border-radius: var(--radius-lg);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.15);
        }
        .stat-item .stat-number {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 8px;
            letter-spacing: -0.02em;
        }
        .stat-item .stat-number .accent {
            color: var(--accent);
        }
        .stat-item .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 400;
        }

        /* ========== Editor Team ========== */
        .editor-section {
            padding: 64px 0;
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .editor-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .editor-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 24px;
            text-align: center;
            transition: var(--transition);
        }
        .editor-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .editor-avatar {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 22px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
        }
        .editor-card .editor-name {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 4px;
        }
        .editor-card .editor-role {
            font-size: 13px;
            color: var(--primary);
            font-weight: 600;
            margin-bottom: 10px;
        }
        .editor-card .editor-bio {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin: 0;
        }

        /* ========== Topic Entry ========== */
        .topic-entry-section {
            padding: 64px 0;
            background: var(--bg-alt);
        }
        .topic-entry-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .topic-entry-card {
            display: flex;
            align-items: center;
            gap: 16px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 20px 24px;
            transition: var(--transition);
            cursor: pointer;
        }
        .topic-entry-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .topic-entry-card .topic-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: var(--primary-light);
            color: var(--primary);
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }
        .topic-entry-card .topic-info h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 4px;
        }
        .topic-entry-card .topic-info p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }
        .topic-entry-card .topic-arrow {
            margin-left: auto;
            color: var(--text-muted);
            font-size: 18px;
            flex-shrink: 0;
            transition: var(--transition);
        }
        .topic-entry-card:hover .topic-arrow {
            color: var(--primary);
            transform: translateX(3px);
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 64px 0;
            background: #fff;
            border-top: 1px solid var(--border);
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-hover);
        }
        .faq-item.active {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            transition: var(--transition);
            background: transparent;
            width: 100%;
            text-align: left;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: var(--transition);
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 22px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.85;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 22px 20px;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--dark-bg);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 28px;
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .footer-brand .logo-mark {
            width: 30px;
            height: 30px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 14px;
            font-weight: 700;
        }
        .footer-desc {
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.8;
            margin: 0;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin: 0 0 14px;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
            font-size: 14px;
        }
        .footer-col ul li a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-bottom .sep {
            opacity: 0.4;
            margin: 0 6px;
        }
        .footer-legal {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }
        .footer-legal a {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-legal a:hover {
            color: #fff;
        }

        /* ========== Scroll to top ========== */
        .scroll-top {
            position: fixed;
            bottom: 28px;
            right: 28px;
            width: 44px;
            height: 44px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            box-shadow: var(--shadow-lg);
            cursor: pointer;
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            z-index: 900;
            border: none;
        }
        .scroll-top.show {
            opacity: 1;
            visibility: visible;
        }
        .scroll-top:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .main-nav {
                gap: 4px;
                margin-left: 8px;
            }
            .main-nav a {
                font-size: 14px;
                padding: 7px 10px;
            }
            .header-cta {
                font-size: 13px;
                padding: 8px 14px;
            }
            .editor-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 768px) {
            .promo-bar .promo-text {
                font-size: 12px;
                white-space: nowrap;
                overflow: hidden;
                text-overflow: ellipsis;
            }
            .main-nav {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .header-actions .icon-btn:not(.hamburger) {
                display: none;
            }
            .header-actions .header-cta {
                display: none;
            }
            .mobile-drawer {
                display: block;
            }
            .header-inner {
                height: 60px;
                gap: 12px;
            }
            .logo {
                font-size: 18px;
            }
            .logo .logo-mark {
                width: 28px;
                height: 28px;
                font-size: 13px;
            }
            .category-header {
                padding: 32px 0 28px;
            }
            .category-header h1 {
                font-size: 24px;
            }
            .category-header .cat-desc {
                font-size: 15px;
            }
            .filter-inner {
                flex-direction: column;
                align-items: stretch;
                gap: 12px;
                padding: 12px 16px;
            }
            .filter-tags {
                gap: 6px;
            }
            .filter-tag {
                font-size: 13px;
                padding: 6px 12px;
            }
            .filter-sort {
                justify-content: flex-end;
            }
            .article-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .article-card .card-body {
                padding: 16px 18px 18px;
            }
            .article-card .card-title {
                font-size: 16px;
            }
            .stats-section {
                padding: 44px 0;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-item .stat-number {
                font-size: 24px;
            }
            .stat-item .stat-label {
                font-size: 13px;
            }
            .editor-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .topic-entry-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .faq-section {
                padding: 44px 0;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-answer {
                font-size: 14px;
                padding: 0 18px;
            }
            .faq-item.active .faq-answer {
                padding: 0 18px 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                margin-bottom: 28px;
            }
            .footer-desc {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .scroll-top {
                bottom: 16px;
                right: 16px;
                width: 40px;
                height: 40px;
                font-size: 16px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-header h1 {
                font-size: 22px;
            }
            .section-title {
                font-size: 22px;
            }
            .article-card .card-title {
                font-size: 15px;
            }
            .article-card .card-excerpt {
                font-size: 13px;
                -webkit-line-clamp: 2;
            }
            .article-card .card-meta {
                flex-wrap: wrap;
                gap: 6px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }
            .stat-item {
                padding: 16px 10px;
            }
            .stat-item .stat-number {
                font-size: 20px;
            }
            .stat-item .stat-label {
                font-size: 12px;
            }
            .topic-entry-card {
                padding: 16px;
            }
            .topic-entry-card .topic-icon {
                width: 36px;
                height: 36px;
                font-size: 16px;
            }
            .topic-entry-card .topic-info h3 {
                font-size: 14px;
            }
            .topic-entry-card .topic-info p {
                font-size: 13px;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #2F54EB;
            --primary-dark: #1D3FBF;
            --primary-light: #EAF0FE;
            --accent: #16C8D8;
            --accent-soft: #E6F9FB;
            --dark-bg: #1B2B46;
            --dark-bg-2: #24354F;
            --bg: #F5F7FB;
            --bg-alt: #F8FAFD;
            --surface: #FFFFFF;
            --text: #1A1F36;
            --text-secondary: #4A5578;
            --text-muted: #7A86A8;
            --border: #E4ECF5;
            --border-hover: #C5D4F0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(47, 84, 235, 0.05);
            --shadow-md: 0 8px 24px rgba(47, 84, 235, 0.06);
            --shadow-lg: 0 16px 40px rgba(47, 84, 235, 0.10);
            --shadow-hover: 0 12px 32px rgba(47, 84, 235, 0.14);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --section-pad: 80px 0;
            --section-pad-mobile: 44px 0;
            --transition: all 0.25s ease;
            --transition-slow: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

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

        button,
        input,
        select,
        textarea {
            font-family: var(--font-sans);
            font-size: 1rem;
            outline: none;
            border: none;
        }

        button {
            cursor: pointer;
            background: none;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(22, 200, 216, 0.5);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            background: var(--primary-light);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 16px;
            border: 1px solid rgba(47, 84, 235, 0.12);
        }

        .section-label .dot {
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            display: inline-block;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.35;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 720px;
            margin-bottom: 40px;
        }

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

        .section-header-centered {
            text-align: center;
            max-width: 780px;
            margin-left: auto;
            margin-right: auto;
        }

        .promo-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        /* ========== Promo Bar ========== */
        .promo-bar {
            background: var(--dark-bg);
            color: rgba(255, 255, 255, 0.85);
            font-size: 13px;
            padding: 8px 0;
            letter-spacing: 0.02em;
        }
        .promo-bar .promo-text {
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .promo-bar .promo-dot {
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            flex-shrink: 0;
            animation: pulse-dot 2s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(22, 200, 216, 0.4); }
            50% { opacity: 0.7; box-shadow: 0 0 0 4px rgba(22, 200, 216, 0); }
        }
        .promo-bar .promo-links {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }
        .promo-bar .promo-links a {
            color: rgba(255, 255, 255, 0.85);
            font-size: 13px;
        }
        .promo-bar .promo-links a:hover {
            color: #fff;
        }

        /* ========== Main Header / Nav ========== */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 12px rgba(47, 84, 235, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            height: 68px;
        }
        .logo {
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
            letter-spacing: -0.02em;
        }
        .logo:hover {
            color: var(--primary);
        }
        .logo .logo-mark {
            width: 34px;
            height: 34px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-left: 12px;
            flex-wrap: nowrap;
        }
        .main-nav a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 13px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .main-nav a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .main-nav a.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 3px;
            background: var(--primary);
            border-radius: var(--radius-full);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .header-icon-btn {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 16px;
            border: 1px solid var(--border);
            background: #fff;
            transition: var(--transition);
        }
        .header-icon-btn:hover {
            color: var(--primary);
            border-color: var(--border-hover);
            background: var(--primary-light);
        }
        .btn-nav-cta {
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            padding: 9px 18px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: var(--transition);
            border: 1px solid var(--primary);
        }
        .btn-nav-cta:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }
        .nav-toggle {
            display: none;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: #fff;
            color: var(--text);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 4px;
        }
        .nav-toggle span {
            display: block;
            width: 18px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-toggle.open span:nth-child(1) {
            transform: translateY(6px) rotate(45deg);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-6px) rotate(-45deg);
        }
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: -300px;
            width: 280px;
            height: 100vh;
            background: #fff;
            z-index: 2000;
            box-shadow: -8px 0 32px rgba(47, 84, 235, 0.12);
            padding: 24px 20px;
            transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            overflow-y: auto;
        }
        .mobile-drawer.open {
            right: 0;
        }
        .mobile-drawer-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(27, 43, 70, 0.5);
            z-index: 1500;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .mobile-drawer-overlay.open {
            opacity: 1;
        }
        .mobile-drawer .drawer-logo {
            font-size: 18px;
            font-weight: 800;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 20px;
        }
        .mobile-drawer .drawer-logo .logo-mark {
            width: 30px;
            height: 30px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 13px;
            font-weight: 700;
        }
        .mobile-drawer nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-drawer nav a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .mobile-drawer nav a:hover,
        .mobile-drawer nav a.active {
            color: var(--primary);
            background: var(--primary-light);
        }
        .mobile-drawer .drawer-cta {
            margin-top: 16px;
            background: var(--primary);
            color: #fff;
            text-align: center;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            display: block;
        }
        .mobile-drawer .drawer-cta:hover {
            background: var(--primary-dark);
            color: #fff;
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb-wrap {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 14px 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--border-hover);
            font-size: 12px;
        }
        .breadcrumb .current {
            color: var(--text);
            font-weight: 500;
        }

        /* ========== Category Page Header ========== */
        .category-header {
            background: linear-gradient(135deg, #F8FAFD 0%, #EAF0FE 100%);
            padding: 48px 0 40px;
            border-bottom: 1px solid var(--border);
        }
        .category-header .category-label {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .category-header h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .category-header .category-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 680px;
            margin-bottom: 20px;
        }
        .category-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .category-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .category-meta .meta-dot {
            width: 5px;
            height: 5px;
            background: var(--accent);
            border-radius: 50%;
        }

        /* ========== Filter / Sort Bar ========== */
        .filter-bar {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 14px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            margin-top: -22px;
            position: relative;
            z-index: 5;
            box-shadow: var(--shadow-sm);
        }
        .filter-tags {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-tags .filter-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-muted);
            margin-right: 4px;
        }
        .filter-tag {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 14px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border);
            background: #fff;
            transition: var(--transition);
            white-space: nowrap;
        }
        .filter-tag:hover {
            color: var(--primary);
            border-color: var(--border-hover);
            background: var(--primary-light);
        }
        .filter-tag.active {
            color: #fff;
            background: var(--primary);
            border-color: var(--primary);
            font-weight: 600;
        }
        .filter-sort {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .filter-sort label {
            font-size: 13px;
            color: var(--text-muted);
            white-space: nowrap;
        }
        .filter-sort select {
            font-size: 13px;
            font-weight: 500;
            color: var(--text);
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 7px 14px;
            cursor: pointer;
            transition: var(--transition);
            appearance: none;
            -webkit-appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' fill='none' stroke='%237A86A8' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 12px center;
            padding-right: 32px;
        }
        .filter-sort select:hover {
            border-color: var(--border-hover);
        }

        /* ========== Player List Section ========== */
        .player-list-section {
            padding: 56px 0 72px;
        }
        .player-list-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            margin-bottom: 28px;
            flex-wrap: wrap;
        }
        .player-list-header .list-title {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.01em;
        }
        .player-list-header .list-count {
            font-size: 13px;
            color: var(--text-muted);
        }
        .player-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .player-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition-slow);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }
        .player-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-hover);
        }
        .player-card .card-img-wrap {
            position: relative;
            height: 180px;
            background: #DCE6F5;
            overflow: hidden;
            border-radius: 0;
        }
        .player-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.5s ease;
        }
        .player-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .player-card .card-img-overlay {
            position: absolute;
            top: 12px;
            left: 12px;
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }
        .player-card .card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .player-card .player-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 11px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 3px 10px;
            border-radius: var(--radius-full);
            margin-bottom: 10px;
            align-self: flex-start;
            border: 1px solid rgba(22, 200, 216, 0.15);
        }
        .player-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 8px;
        }
        .player-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 14px;
            flex: 1;
        }
        .player-card .card-footer-info {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--border);
        }
        .player-card .card-footer-info .info-item {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .player-card .card-footer-info .info-dot {
            width: 5px;
            height: 5px;
            background: var(--accent);
            border-radius: 50%;
            flex-shrink: 0;
        }
        .player-card .card-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: 6px;
            align-self: flex-start;
            transition: var(--transition);
        }
        .player-card .card-link:hover {
            color: var(--primary-dark);
            gap: 8px;
        }

        /* ========== Stats Section ========== */
        .stats-section {
            padding: 72px 0;
            background: var(--dark-bg);
            color: #fff;
            border-radius: 0;
        }
        .stats-section .section-label {
            background: rgba(255, 255, 255, 0.1);
            color: var(--accent);
            border-color: rgba(22, 200, 216, 0.2);
        }
        .stats-section .section-title {
            color: #fff;
        }
        .stats-section .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            transition: var(--transition);
        }
        .stat-card:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(22, 200, 216, 0.3);
            transform: translateY(-3px);
        }
        .stat-number {
            font-size: 38px;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 8px;
            letter-spacing: -0.02em;
        }
        .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            font-weight: 400;
            line-height: 1.5;
        }

        /* ========== Dimension Section ========== */
        .dimension-section {
            padding: 72px 0;
            background: #fff;
        }
        .dimension-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .dimension-card {
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 24px 22px;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .dimension-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            background: #fff;
        }
        .dimension-card .dimension-num {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent);
            background: var(--accent-soft);
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 6px;
            border: 1px solid rgba(22, 200, 216, 0.15);
        }
        .dimension-card h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.35;
        }
        .dimension-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ========== Related Section ========== */
        .related-section {
            padding: 72px 0;
            background: var(--bg);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .related-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-hover);
        }
        .related-card .related-img {
            height: 150px;
            background: #DCE6F5;
            overflow: hidden;
            border-radius: 0;
        }
        .related-card .related-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .related-body {
            padding: 16px 18px 18px;
        }
        .related-card h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.45;
            margin-bottom: 6px;
        }
        .related-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* ========== FAQ Section ========== */
        .faq-section {
            padding: 72px 0;
            background: #fff;
            border-top: 1px solid var(--border);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-sm);
        }
        .faq-item .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            transition: var(--transition);
            border: none;
            background: transparent;
        }
        .faq-item .faq-question:hover {
            color: var(--primary);
        }
        .faq-item .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            flex-shrink: 0;
            transition: var(--transition);
        }
        .faq-item .faq-answer {
            display: none;
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            display: block;
        }
        .faq-item.active .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }
        .faq-item.active {
            border-color: var(--border-hover);
            background: #fff;
            box-shadow: var(--shadow-sm);
        }

        /* ========== View More ========== */
        .view-more-wrap {
            text-align: center;
            margin-top: 36px;
        }
        .btn-view-more {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary);
            border: 1px solid var(--border);
            border-radius: var(--radius-full);
            padding: 12px 28px;
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .btn-view-more:hover {
            color: #fff;
            background: var(--primary);
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            gap: 12px;
        }
        .btn-view-more .arrow {
            transition: var(--transition);
        }
        .btn-view-more:hover .arrow {
            transform: translateX(4px);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--dark-bg);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 28px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand {
            font-size: 18px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }
        .footer-brand .logo-mark {
            width: 28px;
            height: 28px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 12px;
            font-weight: 700;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.65);
            max-width: 340px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: var(--transition);
        }
        .footer-col ul a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-bottom .sep {
            margin: 0 6px;
            color: rgba(255, 255, 255, 0.2);
        }
        .footer-legal {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }
        .footer-legal a {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-legal a:hover {
            color: var(--accent);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .player-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .dimension-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .mobile-drawer {
                display: block;
            }
            .mobile-drawer-overlay {
                display: block;
            }
            .header-inner {
                height: 60px;
                gap: 12px;
            }
            .section-title {
                font-size: 24px;
            }
            .category-header {
                padding: 32px 0 28px;
            }
            .category-header h1 {
                font-size: 26px;
            }
            .category-header .category-desc {
                font-size: 15px;
            }
            .player-list-section {
                padding: 40px 0 48px;
            }
            .player-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .player-card .card-img-wrap {
                height: 200px;
            }
            .filter-bar {
                padding: 12px 14px;
                margin-top: -16px;
            }
            .stats-section {
                padding: 48px 0;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-number {
                font-size: 28px;
            }
            .dimension-section {
                padding: 48px 0;
            }
            .dimension-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .related-section {
                padding: 48px 0;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .faq-section {
                padding: 48px 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            .promo-bar .promo-links {
                display: none;
            }
            .btn-nav-cta {
                display: none;
            }
            .header-actions .header-icon-btn:last-child {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-header h1 {
                font-size: 22px;
            }
            .category-header .category-desc {
                font-size: 14px;
                line-height: 1.75;
            }
            .player-card .card-img-wrap {
                height: 160px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .stat-number {
                font-size: 26px;
            }
            .filter-tags {
                gap: 6px;
            }
            .filter-tag {
                font-size: 12px;
                padding: 5px 10px;
            }
            .section-title {
                font-size: 22px;
                line-height: 1.4;
            }
            .section-subtitle {
                font-size: 14px;
            }
            .player-list-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .btn-view-more {
                padding: 10px 22px;
                font-size: 13px;
            }
            .faq-item .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-item .faq-answer {
                padding: 0 16px 14px;
                font-size: 13px;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #2F54EB;
            --primary-dark: #1D3FBF;
            --primary-light: #EAF0FE;
            --accent: #16C8D8;
            --accent-soft: #E6F9FB;
            --dark-bg: #1B2B46;
            --dark-bg-2: #24354F;
            --bg: #F5F7FB;
            --bg-alt: #F8FAFD;
            --surface: #FFFFFF;
            --text: #1A1F36;
            --text-secondary: #4A5578;
            --text-muted: #7A86A8;
            --border: #E4ECF5;
            --border-hover: #C5D4F0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(47, 84, 235, 0.05);
            --shadow-md: 0 8px 24px rgba(47, 84, 235, 0.06);
            --shadow-lg: 0 16px 40px rgba(47, 84, 235, 0.10);
            --shadow-hover: 0 12px 32px rgba(47, 84, 235, 0.14);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --section-pad: 72px 0;
            --section-pad-mobile: 44px 0;
            --transition: all 0.25s ease;
            --transition-slow: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        button,
        input,
        select,
        textarea {
            font-family: var(--font-sans);
            font-size: 1rem;
            outline: none;
            border: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 3px solid rgba(22, 200, 216, 0.5);
            outline-offset: 2px;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            background: var(--primary-light);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 16px;
            border: 1px solid rgba(47, 84, 235, 0.12);
        }
        .section-label .dot {
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            display: inline-block;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.35;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 720px;
            margin-bottom: 40px;
        }
        .section-header {
            margin-bottom: 40px;
        }
        .section-header-centered {
            text-align: center;
            max-width: 780px;
            margin-left: auto;
            margin-right: auto;
        }

        /* Promo Bar */
        .promo-bar {
            background: var(--dark-bg);
            color: #fff;
            font-size: 13px;
            padding: 8px 24px;
            min-height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            letter-spacing: 0.02em;
        }
        .promo-bar .container {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .promo-bar span {
            color: #fff;
            opacity: 0.9;
        }
        .promo-bar .promo-highlight {
            color: var(--accent);
            font-weight: 600;
            opacity: 1;
        }

        /* Header / Nav */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 12px rgba(47, 84, 235, 0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            height: 68px;
        }
        .logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
            letter-spacing: -0.02em;
        }
        .logo:hover {
            color: var(--primary);
        }
        .logo .logo-mark {
            width: 34px;
            height: 34px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-left: 10px;
            flex: 1;
            justify-content: center;
        }
        .main-nav a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
            position: relative;
            border: 1px solid transparent;
        }
        .main-nav a:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .main-nav a.active {
            color: var(--primary);
            background: var(--primary-light);
            border-color: rgba(47, 84, 235, 0.15);
            font-weight: 600;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .search-btn,
        .fav-btn {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 17px;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .search-btn:hover,
        .fav-btn:hover {
            color: var(--primary);
            background: var(--primary-light);
            border-color: rgba(47, 84, 235, 0.12);
        }
        .header-cta {
            background: var(--primary);
            color: #fff;
            padding: 9px 20px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition);
            white-space: nowrap;
            border: 1px solid var(--primary);
        }
        .header-cta:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
        }
        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 22px;
            border: 1px solid var(--border);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .hamburger:hover {
            color: var(--primary);
            border-color: var(--border-hover);
            background: var(--primary-light);
        }

        /* Breadcrumb */
        .breadcrumb-section {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 16px 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .separator {
            color: var(--text-muted);
            opacity: 0.7;
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* Category Header */
        .cat-header {
            background: linear-gradient(135deg, #ffffff 0%, var(--bg-alt) 100%);
            border-bottom: 1px solid var(--border);
            padding: 48px 0 40px;
        }
        .cat-header-inner {
            max-width: 820px;
        }
        .cat-header .breadcrumb {
            margin-bottom: 24px;
        }
        .cat-header h1 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .cat-header .cat-desc {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 0;
        }

        /* Filter Bar */
        .filter-bar-section {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 16px 0;
        }
        .filter-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .filter-tags {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-tag {
            padding: 7px 16px;
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-alt);
            border: 1px solid var(--border);
            transition: var(--transition);
            cursor: pointer;
        }
        .filter-tag:hover {
            color: var(--primary);
            border-color: var(--border-hover);
            background: var(--primary-light);
        }
        .filter-tag.active {
            color: #fff;
            background: var(--primary);
            border-color: var(--primary);
            font-weight: 600;
        }
        .filter-sort {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
        }
        .filter-sort select {
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: #fff;
            color: var(--text);
            font-size: 14px;
            cursor: pointer;
            transition: var(--transition);
        }
        .filter-sort select:hover {
            border-color: var(--border-hover);
        }

        /* Main content sections */
        main {
            background-color: var(--bg);
        }
        .cat-main-section {
            padding: var(--section-pad);
        }
        .cat-main-section-alt {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            padding: var(--section-pad);
        }

        /* Gear cards grid */
        .gear-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .gear-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition-slow);
            display: flex;
            flex-direction: column;
        }
        .gear-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-hover);
        }
        .gear-card-img {
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
            position: relative;
            background: var(--bg-alt);
            border-bottom: 1px solid var(--border);
        }
        .gear-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: var(--transition-slow);
        }
        .gear-card:hover .gear-card-img img {
            transform: scale(1.04);
        }
        .gear-card-img .gear-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(255, 255, 255, 0.92);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            border: 1px solid rgba(47, 84, 235, 0.15);
            backdrop-filter: blur(4px);
        }
        .gear-card-body {
            padding: 20px 20px 18px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .gear-card-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.45;
            margin-bottom: 10px;
        }
        .gear-card-body h3 a {
            color: var(--text);
        }
        .gear-card-body h3 a:hover {
            color: var(--primary);
        }
        .gear-card-body .gear-excerpt {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 16px;
            flex: 1;
        }
        .gear-card-body .gear-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--border);
        }
        .gear-card-body .gear-meta .gear-date {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .gear-card-body .gear-meta .gear-read {
            color: var(--primary);
            font-weight: 500;
        }

        /* Stats strip */
        .stats-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border-hover);
            transform: translateY(-2px);
        }
        .stat-number {
            font-size: 30px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
            letter-spacing: -0.02em;
        }
        .stat-number .stat-unit {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-muted);
            margin-left: 2px;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* Team/editorial */
        .editorial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .editorial-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .editorial-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border-hover);
        }
        .editorial-card .editorial-icon {
            width: 46px;
            height: 46px;
            background: var(--primary-light);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            color: var(--primary);
            font-size: 20px;
        }
        .editorial-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
        .editorial-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* Related topics */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .related-topic-card {
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 20px 16px;
            text-align: center;
            transition: var(--transition);
            cursor: pointer;
        }
        .related-topic-card:hover {
            background: var(--primary-light);
            border-color: var(--border-hover);
            transform: translateY(-3px);
            box-shadow: var(--shadow-sm);
        }
        .related-topic-card .topic-icon {
            font-size: 24px;
            margin-bottom: 8px;
        }
        .related-topic-card h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-sm);
        }
        .faq-item summary {
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '+';
            font-size: 22px;
            font-weight: 300;
            color: var(--text-muted);
            flex-shrink: 0;
            transition: var(--transition);
        }
        .faq-item[open] summary::after {
            content: '−';
            color: var(--primary);
        }
        .faq-item summary:hover {
            color: var(--primary);
        }
        .faq-item .faq-answer {
            padding: 0 20px 18px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
            border-top: 1px solid var(--border);
            padding-top: 14px;
            margin: 0 20px 18px;
        }

        /* CTA section */
        .cat-cta-section {
            background: linear-gradient(135deg, var(--dark-bg) 0%, var(--dark-bg-2) 100%);
            padding: 56px 0;
        }
        .cat-cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }
        .cat-cta-inner h3 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.35;
        }
        .cat-cta-inner p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.8;
            max-width: 520px;
        }
        .cat-cta-btn {
            background: var(--primary);
            color: #fff;
            padding: 13px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            transition: var(--transition);
            border: 1px solid var(--primary);
            white-space: nowrap;
        }
        .cat-cta-btn:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        /* Footer */
        .site-footer {
            background: var(--dark-bg);
            color: rgba(255, 255, 255, 0.75);
            padding: 48px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand {
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }
        .footer-brand .logo-mark {
            width: 32px;
            height: 32px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 15px;
            font-weight: 700;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            max-width: 420px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom .sep {
            margin: 0 8px;
            opacity: 0.5;
        }
        .footer-legal {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-legal a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 13px;
        }
        .footer-legal a:hover {
            color: var(--accent);
        }
        .footer-legal .sep {
            margin: 0 6px;
            opacity: 0.5;
        }

        /* Mobile drawer */
        .mobile-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.4);
            z-index: 999;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .mobile-overlay.open {
            display: block;
            opacity: 1;
        }
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: -300px;
            width: 280px;
            height: 100%;
            background: #fff;
            box-shadow: -8px 0 24px rgba(0, 0, 0, 0.1);
            z-index: 1001;
            padding: 20px 16px;
            transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            flex-direction: column;
            gap: 12px;
        }
        .mobile-drawer.open {
            right: 0;
        }
        .mobile-drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
        }
        .mobile-drawer-close {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 20px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .mobile-drawer-close:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .mobile-drawer .main-nav-mobile {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-drawer .main-nav-mobile a {
            font-size: 16px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 12px 14px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .mobile-drawer .main-nav-mobile a:hover,
        .mobile-drawer .main-nav-mobile a.active {
            color: var(--primary);
            background: var(--primary-light);
            border-color: rgba(47, 84, 235, 0.12);
        }
        .mobile-drawer .mobile-cta {
            margin-top: 20px;
            background: var(--primary);
            color: #fff;
            padding: 12px 20px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            text-align: center;
            transition: var(--transition);
            border: 1px solid var(--primary);
        }
        .mobile-drawer .mobile-cta:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .gear-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
            }
            .editorial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-pad: var(--section-pad-mobile);
            }
            .main-nav {
                display: none;
            }
            .hamburger {
                display: flex;
            }
            .mobile-drawer {
                display: flex;
            }
            .header-actions .search-btn,
            .header-actions .fav-btn {
                display: none;
            }
            .header-cta {
                display: none;
            }
            .header-inner {
                height: 60px;
                gap: 12px;
            }
            .logo {
                font-size: 19px;
            }
            .logo .logo-mark {
                width: 30px;
                height: 30px;
                font-size: 14px;
            }
            .promo-bar {
                font-size: 12px;
                padding: 6px 12px;
                min-height: 32px;
            }
            .cat-header {
                padding: 32px 0 28px;
            }
            .cat-header h1 {
                font-size: 26px;
            }
            .cat-header .cat-desc {
                font-size: 15px;
            }
            .gear-grid {
                grid-template-columns: 1fr;
            }
            .stats-strip {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-number {
                font-size: 24px;
            }
            .editorial-grid {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .cat-cta-inner {
                flex-direction: column;
                align-items: flex-start;
                gap: 20px;
            }
            .cat-cta-inner h3 {
                font-size: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
            }
            .breadcrumb {
                font-size: 13px;
            }
            .section-title {
                font-size: 24px;
            }
        }
        @media (max-width: 520px) {
            .stats-strip {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .container {
                padding: 0 16px;
            }
            .cat-header h1 {
                font-size: 23px;
            }
            .gear-card-body h3 {
                font-size: 16px;
            }
            .filter-tag {
                padding: 6px 12px;
                font-size: 12px;
            }
            .promo-bar .promo-highlight {
                display: block;
            }
        }