/* roulang page: index */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-soft: #3B82F6;
            --accent: #0EA5E9;
            --accent-soft: #E0F2FE;
            --bg: #FFFFFF;
            --bg-alt: #F8FAFC;
            --bg-soft: #EFF6FF;
            --text: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --border-strong: #CBD5E1;
            --success: #16A34A;
            --success-soft: #DCFCE7;
            --warning: #F59E0B;
            --warning-soft: #FEF3C7;
            --danger: #DC2626;
            --danger-soft: #FEE2E2;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-pill: 999px;
            --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.08), 0 8px 24px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 8px 16px rgba(37, 99, 235, 0.12), 0 24px 48px rgba(15, 23, 42, 0.10);
            --shadow-nav: 0 1px 2px rgba(15, 23, 42, 0.04), 0 4px 16px rgba(15, 23, 42, 0.04);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            --font-en: "Inter", "Segoe UI", system-ui, sans-serif;
            --section-pad: clamp(3.5rem, 7vw, 6.5rem);
            --container-pad: clamp(1.25rem, 4vw, 2.5rem);
            --container-max: 1200px;
            --transition-fast: 160ms ease;
            --transition-base: 240ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-cn);
            font-size: 16px;
            font-weight: 400;
            line-height: 1.7;
            color: var(--text-body);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text);
            font-weight: 700;
            line-height: 1.25;
            margin: 0 0 0.5rem;
        }

        h1 {
            font-size: clamp(34px, 5vw, 48px);
            line-height: 1.2;
            margin-bottom: 1rem;
        }

        h2 {
            font-size: clamp(28px, 3.5vw, 36px);
            margin-bottom: 0.75rem;
        }

        h3 {
            font-size: clamp(20px, 2.4vw, 24px);
            font-weight: 600;
            line-height: 1.35;
            margin-bottom: 0.5rem;
        }

        p {
            margin-bottom: 1rem;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-pad);
            padding-right: var(--container-pad);
        }

        .section {
            padding-top: var(--section-pad);
            padding-bottom: var(--section-pad);
        }

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

        .section-soft {
            background-color: var(--bg-soft);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--primary);
            background: var(--accent-soft);
            padding: 0.4rem 1rem;
            border-radius: var(--radius-pill);
            margin-bottom: 1rem;
            text-transform: none;
        }

        .section-heading {
            font-size: clamp(26px, 3.2vw, 34px);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: clamp(16px, 1.5vw, 18px);
            color: var(--text-muted);
            max-width: 720px;
            line-height: 1.7;
            margin-bottom: 2.5rem;
        }

        /* ============ Header / Navigation ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-nav);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.25rem;
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: inline-flex;
            align-items: center;
            gap: 0.55rem;
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.01em;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }

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

        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 0.35rem;
            overflow-x: auto;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
            padding: 0.2rem;
            flex: 1;
            justify-content: center;
            min-width: 0;
        }

        .nav-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.55rem 1rem;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            background: transparent;
            border-radius: var(--radius-pill);
            white-space: nowrap;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
        }

        .nav-tab:hover {
            background: var(--bg-soft);
            color: var(--primary);
        }

        .nav-tab.active {
            background: var(--accent);
            color: #fff;
            font-weight: 600;
            border-color: var(--accent);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
            padding: 0.6rem 1.35rem;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border-radius: var(--radius-sm);
            white-space: nowrap;
            transition: all var(--transition-fast);
            flex-shrink: 0;
            border: 1px solid var(--primary);
        }

        .nav-cta:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            color: #fff;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
        }

        .nav-cta:focus-visible,
        .btn:focus-visible,
        .chip:focus-visible,
        .search-btn:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.35);
            outline-offset: 2px;
        }

        /* ============ Buttons ============ */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.75rem 1.75rem;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: all var(--transition-base);
            border: 1px solid transparent;
            cursor: pointer;
            line-height: 1.4;
            white-space: nowrap;
        }

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

        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.28);
            transform: translateY(-1px);
            color: #fff;
        }

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

        .btn-secondary:hover {
            background: var(--bg-soft);
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: var(--shadow-card);
        }

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

        .btn-accent:hover {
            background: #0284C7;
            border-color: #0284C7;
            box-shadow: 0 8px 20px rgba(14, 165, 233, 0.28);
            transform: translateY(-1px);
            color: #fff;
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.6);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
            color: #fff;
        }

        .btn-block {
            width: 100%;
        }

        .btn-sm {
            padding: 0.5rem 1.1rem;
            font-size: 13px;
            border-radius: var(--radius-sm);
        }

        .btn-lg {
            padding: 1rem 2rem;
            font-size: 16px;
            border-radius: var(--radius-md);
        }

        /* ============ Hero ============ */
        .hero {
            position: relative;
            overflow: hidden;
            padding-top: clamp(4rem, 8vw, 7rem);
            padding-bottom: clamp(4rem, 8vw, 7rem);
            background: linear-gradient(165deg, #F0F7FF 0%, #F8FAFC 40%, #EFF6FF 70%, #F8FAFC 100%);
            border-bottom: 1px solid var(--border);
        }

        .hero::before {
            content: "";
            position: absolute;
            top: -30%;
            right: -10%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero::after {
            content: "";
            position: absolute;
            bottom: -20%;
            left: -5%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(14, 165, 233, 0.07) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            z-index: 1;
            max-width: 880px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(255, 255, 255, 0.7);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(37, 99, 235, 0.2);
            padding: 0.45rem 1.1rem;
            border-radius: var(--radius-pill);
            margin-bottom: 1.5rem;
        }

        .hero-title {
            font-size: clamp(36px, 6vw, 54px);
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin-bottom: 1.25rem;
            text-wrap: balance;
        }

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

        .hero-title .highlight::after {
            content: "";
            position: absolute;
            bottom: 4px;
            left: 0;
            width: 100%;
            height: 8px;
            background: rgba(37, 99, 235, 0.12);
            border-radius: 4px;
            z-index: -1;
        }

        .hero-desc {
            font-size: clamp(16px, 1.8vw, 18px);
            color: var(--text-body);
            line-height: 1.8;
            max-width: 720px;
            margin-bottom: 2rem;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .hero-points {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
        }

        .hero-point {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-muted);
            background: rgba(255, 255, 255, 0.8);
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            padding: 0.45rem 1rem;
            transition: all var(--transition-fast);
        }

        .hero-point:hover {
            border-color: var(--accent);
            color: var(--text-body);
            background: #fff;
        }

        .hero-point-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 18px;
            height: 18px;
            font-size: 12px;
            background: var(--accent-soft);
            color: var(--primary);
            border-radius: 50%;
            flex-shrink: 0;
        }

        /* ============ Search Bar ============ */
        .search-section {
            padding-top: 2rem;
            padding-bottom: 2rem;
            margin-top: -0.5rem;
        }

        .search-bar-wrap {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            background: #fff;
            border: 2px solid var(--border);
            border-radius: var(--radius-md);
            padding: 0.5rem 0.75rem;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            max-width: 760px;
            margin: 0 auto;
        }

        .search-bar-wrap:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1), var(--shadow-card);
        }

        .search-icon {
            font-size: 18px;
            color: var(--text-muted);
            flex-shrink: 0;
            padding-left: 0.25rem;
        }

        .search-input {
            flex: 1;
            border: none;
            outline: none;
            font-size: 15px;
            color: var(--text);
            background: transparent;
            padding: 0.5rem 0;
            min-width: 0;
        }

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

        .search-btn {
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            padding: 0.55rem 1.4rem;
            font-size: 14px;
            font-weight: 600;
            flex-shrink: 0;
            transition: all var(--transition-fast);
            border: 1px solid var(--primary);
        }

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

        .search-chips {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            justify-content: center;
            margin-top: 1.25rem;
        }

        .chip {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.45rem 1.1rem;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-muted);
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .chip:hover {
            background: var(--bg-soft);
            border-color: var(--accent);
            color: var(--primary);
        }

        .chip.active {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            font-weight: 600;
        }

        /* ============ Category Matrix ============ */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .category-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }

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

        .category-card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--bg-alt);
        }

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

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

        .category-card-body {
            padding: 1.25rem 1.35rem 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            flex: 1;
        }

        .category-card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            transition: color var(--transition-fast);
        }

        .category-card:hover .category-card-title {
            color: var(--primary);
        }

        .category-card-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            flex: 1;
        }

        .category-card-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            transition: gap var(--transition-fast);
        }

        .category-card-link:hover {
            gap: 0.6rem;
            color: var(--primary-hover);
        }

        /* ============ Featured Match List ============ */
        .match-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .match-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 1.2rem 1.5rem;
            display: flex;
            align-items: center;
            gap: 1.25rem;
            transition: all var(--transition-base);
            box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
        }

        .match-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
        }

        .match-time {
            flex-shrink: 0;
            text-align: center;
            min-width: 60px;
        }

        .match-time-date {
            font-size: 12px;
            color: var(--text-muted);
            font-weight: 500;
        }

        .match-time-clock {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
        }

        .match-teams {
            flex: 1;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            min-width: 0;
        }

        .match-team {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .match-vs {
            font-size: 13px;
            color: var(--text-muted);
            flex-shrink: 0;
        }

        .match-score {
            flex-shrink: 0;
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.05em;
            min-width: 50px;
            text-align: center;
        }

        .match-status {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            font-size: 12px;
            font-weight: 600;
            padding: 0.35rem 0.75rem;
            border-radius: var(--radius-pill);
        }

        .match-status.live {
            background: var(--danger-soft);
            color: var(--danger);
        }

        .match-status.upcoming {
            background: var(--success-soft);
            color: var(--success);
        }

        .match-status.finished {
            background: var(--bg-alt);
            color: var(--text-muted);
        }

        .match-card-cover {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--bg-alt);
            display: none;
        }

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

        /* ============ Update List ============ */
        .update-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
        }

        .update-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 1.25rem 1.4rem;
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            transition: all var(--transition-fast);
            box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
        }

        .update-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-card);
        }

        .update-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--success);
            flex-shrink: 0;
            margin-top: 0.4rem;
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }

        .update-content {
            flex: 1;
        }

        .update-text {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.65;
            margin-bottom: 0.25rem;
        }

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

        /* ============ Ranking ============ */
        .ranking-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            counter-reset: ranking;
        }

        .ranking-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 1rem 1.4rem;
            display: flex;
            align-items: center;
            gap: 1rem;
            transition: all var(--transition-fast);
            counter-increment: ranking;
        }

        .ranking-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
        }

        .ranking-number {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-muted);
            min-width: 36px;
            text-align: center;
            flex-shrink: 0;
        }

        .ranking-item:nth-child(1) .ranking-number {
            color: #F59E0B;
        }
        .ranking-item:nth-child(2) .ranking-number {
            color: #94A3B8;
        }
        .ranking-item:nth-child(3) .ranking-number {
            color: #B45309;
        }

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

        .ranking-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
        }

        .ranking-meta {
            font-size: 13px;
            color: var(--text-muted);
        }

        .ranking-view {
            flex-shrink: 0;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--accent-soft);
            padding: 0.35rem 0.75rem;
            border-radius: var(--radius-pill);
        }

        /* ============ Resource Center ============ */
        .resource-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.25rem;
        }

        .resource-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            transition: all var(--transition-base);
            box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
        }

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

        .resource-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            font-size: 20px;
            background: var(--bg-soft);
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }

        .resource-info h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 0.3rem;
        }

        .resource-info p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 0.5rem;
        }

        .resource-download {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
        }

        /* ============ News ============ */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.25rem;
        }

        .news-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
            box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
            display: flex;
            flex-direction: column;
        }

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

        .news-card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-alt);
        }

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

        .news-card:hover .news-card-img img {
            transform: scale(1.05);
        }

        .news-card-body {
            padding: 1.2rem 1.4rem 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            flex: 1;
        }

        .news-date {
            font-size: 12px;
            font-weight: 500;
            color: var(--text-muted);
        }

        .news-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.4;
            transition: color var(--transition-fast);
        }

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

        .news-summary {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            flex: 1;
        }

        .news-read {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }

        /* ============ Favorite Entry ============ */
        .fav-entry {
            background: linear-gradient(135deg, #EFF6FF 0%, #F8FAFC 60%, #E0F2FE 100%);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            display: flex;
            align-items: center;
            gap: 2rem;
            flex-wrap: wrap;
        }

        .fav-entry-info {
            flex: 1;
            min-width: 260px;
        }

        .fav-entry-title {
            font-size: clamp(20px, 2.5vw, 26px);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.5rem;
        }

        .fav-entry-desc {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        .fav-entry-action {
            flex-shrink: 0;
            display: flex;
            gap: 0.75rem;
            flex-wrap: wrap;
        }

        /* ============ Data Stats ============ */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.25rem;
        }

        .stat-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 1.75rem 1.5rem;
            text-align: center;
            transition: all var(--transition-fast);
            box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
        }

        .stat-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
        }

        .stat-num {
            font-size: clamp(28px, 3.5vw, 38px);
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin-bottom: 0.4rem;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }

        .brand-intro {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 2rem 2.25rem;
            margin-top: 2rem;
            box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
        }

        .brand-intro h3 {
            font-size: 20px;
            margin-bottom: 0.75rem;
        }

        .brand-intro p {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 0.5rem;
        }

        /* ============ Use Scenarios ============ */
        .scenario-track {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.25rem;
        }

        .scenario-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            transition: all var(--transition-base);
            box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
        }

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

        .scenario-icon {
            font-size: 26px;
            margin-bottom: 0.75rem;
        }

        .scenario-name {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.4rem;
        }

        .scenario-desc {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.65;
        }

        /* ============ Pricing ============ */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
            align-items: stretch;
        }

        .price-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 2rem 1.75rem;
            display: flex;
            flex-direction: column;
            transition: all var(--transition-base);
            box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
            position: relative;
        }

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

        .price-card.featured {
            border: 2px solid var(--primary);
            box-shadow: 0 4px 20px rgba(37, 99, 235, 0.12);
        }

        .price-badge {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--primary);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 0.35rem 1.2rem;
            border-radius: var(--radius-pill);
            white-space: nowrap;
        }

        .price-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.75rem;
        }

        .price-amount {
            font-size: clamp(32px, 4vw, 42px);
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin-bottom: 0.5rem;
        }

        .price-period {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 1.25rem;
        }

        .price-features {
            flex: 1;
            margin-bottom: 1.5rem;
        }

        .price-features li {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 14px;
            color: var(--text-body);
            padding: 0.4rem 0;
            line-height: 1.5;
        }

        .price-check {
            color: var(--success);
            font-weight: 700;
            flex-shrink: 0;
        }

        /* ============ Reviews ============ */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.25rem;
        }

        .review-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            transition: all var(--transition-fast);
            box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
        }

        .review-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
        }

        .review-header {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .review-avatar {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: var(--bg-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            flex-shrink: 0;
        }

        .review-user {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
        }

        .review-stars {
            font-size: 13px;
            color: var(--warning);
            letter-spacing: 0.1em;
        }

        .review-text {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.65;
        }

        /* ============ FAQ ============ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--accent);
        }

        .faq-item.open {
            border-color: var(--primary);
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.08);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.2rem 1.5rem;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            cursor: pointer;
            transition: all var(--transition-fast);
            background: transparent;
            border: none;
            line-height: 1.5;
        }

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

        .faq-arrow {
            font-size: 16px;
            color: var(--text-muted);
            transition: transform var(--transition-base);
            flex-shrink: 0;
            display: inline-flex;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow);
            padding: 0 1.5rem;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-bottom: 1.5rem;
            padding-top: 0.25rem;
        }

        /* ============ CTA ============ */
        .cta-section {
            padding-top: var(--section-pad);
            padding-bottom: var(--section-pad);
        }

        .cta-panel {
            background: linear-gradient(140deg, #1D4ED8 0%, #2563EB 40%, #0EA5E9 100%);
            border-radius: var(--radius-xl);
            padding: clamp(2.5rem, 6vw, 4.5rem);
            display: flex;
            align-items: center;
            gap: 2.5rem;
            flex-wrap: wrap;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-panel::before {
            content: "";
            position: absolute;
            top: -50%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-info {
            flex: 1;
            min-width: 280px;
            position: relative;
            z-index: 1;
        }

        .cta-info h2 {
            color: #fff;
            font-size: clamp(24px, 3vw, 32px);
            margin-bottom: 0.75rem;
        }

        .cta-info p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 15px;
            line-height: 1.7;
            margin-bottom: 0.5rem;
        }

        .cta-actions {
            flex-shrink: 0;
            display: flex;
            flex-direction: column;
            gap: 1rem;
            position: relative;
            z-index: 1;
        }

        .cta-form {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            min-width: 280px;
        }

        .cta-form input {
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: var(--radius-sm);
            padding: 0.7rem 1.1rem;
            color: #fff;
            font-size: 14px;
            outline: none;
            transition: all var(--transition-fast);
        }

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

        .cta-form input:focus {
            background: rgba(255, 255, 255, 0.2);
            border-color: #fff;
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.15);
        }

        .cta-privacy {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 0.25rem;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--text);
            color: rgba(255, 255, 255, 0.75);
            padding-top: 3rem;
            padding-bottom: 2rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.15);
            margin-bottom: 1.5rem;
        }

        .footer-brand .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
        }

        .footer-brand p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 0.9rem;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .footer-col a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }

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

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: underline;
        }

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

        /* ============ Responsive ============ */
        @media (max-width: 1280px) {
            .category-grid,
            .resource-grid,
            .review-grid,
            .pricing-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid,
            .scenario-track {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 1024px) {
            .nav-container {
                flex-wrap: wrap;
                gap: 0.75rem;
            }
            .nav-tabs {
                order: 3;
                width: 100%;
                justify-content: flex-start;
                padding-bottom: 0.25rem;
            }
            .nav-cta {
                margin-left: auto;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .category-grid,
            .resource-grid,
            .review-grid,
            .pricing-grid,
            .stats-grid,
            .scenario-track,
            .update-list {
                grid-template-columns: 1fr;
            }
            .match-item {
                flex-wrap: wrap;
                gap: 0.75rem;
                padding: 1rem;
            }
            .match-teams {
                width: 100%;
                order: 3;
            }
            .match-score {
                margin-left: auto;
            }
            .hero-title {
                font-size: clamp(28px, 7vw, 36px);
            }
            .hero-actions {
                flex-direction: column;
            }
            .btn {
                width: 100%;
            }
            .fav-entry {
                padding: 1.75rem;
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-panel {
                padding: 2rem 1.5rem;
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-form {
                width: 100%;
                min-width: auto;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .nav-tabs {
                gap: 0.25rem;
            }
            .nav-tab {
                padding: 0.45rem 0.8rem;
                font-size: 13px;
            }
            .search-bar-wrap {
                padding: 0.4rem 0.6rem;
            }
        }

        @media (max-width: 520px) {
            .section {
                padding-top: 2.5rem;
                padding-bottom: 2.5rem;
            }
            .nav-logo {
                font-size: 19px;
            }
            .nav-logo-icon {
                width: 30px;
                height: 30px;
                font-size: 15px;
            }
            .hero {
                padding-top: 2.5rem;
                padding-bottom: 2.5rem;
            }
            .ranking-number {
                font-size: 18px;
                min-width: 28px;
            }
            .stat-num {
                font-size: 26px;
            }
            .price-card {
                padding: 1.5rem 1.25rem;
            }
            .news-card-body {
                padding: 1rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-soft: #3B82F6;
            --accent: #0EA5E9;
            --accent-soft: #E0F2FE;
            --bg: #FFFFFF;
            --bg-alt: #F8FAFC;
            --bg-soft: #EFF6FF;
            --text: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --border-strong: #CBD5E1;
            --success: #16A34A;
            --success-soft: #DCFCE7;
            --warning: #F59E0B;
            --warning-soft: #FEF3C7;
            --danger: #DC2626;
            --danger-soft: #FEE2E2;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-pill: 999px;
            --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.08), 0 8px 24px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 8px 16px rgba(37, 99, 235, 0.12), 0 24px 48px rgba(15, 23, 42, 0.10);
            --shadow-nav: 0 1px 2px rgba(15, 23, 42, 0.04), 0 4px 16px rgba(15, 23, 42, 0.04);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            --font-en: "Inter", "Segoe UI", system-ui, sans-serif;
            --section-pad: clamp(3.5rem, 7vw, 6.5rem);
            --container-pad: clamp(1.25rem, 4vw, 2.5rem);
            --container-max: 1200px;
            --transition-fast: 160ms ease;
            --transition-base: 240ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            margin: 0;
            font-family: var(--font-cn);
            font-size: 16px;
            font-weight: 400;
            line-height: 1.7;
            color: var(--text-body);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        h1, h2, h3, h4, h5, h6 {
            margin: 0;
            color: var(--text);
            line-height: 1.25;
        }

        p {
            margin: 0;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

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

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

        ul, ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        input, textarea, select {
            outline: none;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-pad);
            padding-right: var(--container-pad);
        }

        .section {
            padding-top: var(--section-pad);
            padding-bottom: var(--section-pad);
        }

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

        .section-soft {
            background-color: var(--bg-soft);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--primary);
            background: var(--accent-soft);
            padding: 0.4rem 1rem;
            border-radius: var(--radius-pill);
            margin-bottom: 1rem;
        }

        .section-heading {
            font-size: clamp(26px, 3.2vw, 34px);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: clamp(16px, 1.5vw, 18px);
            color: var(--text-muted);
            max-width: 720px;
            line-height: 1.7;
            margin-bottom: 2.5rem;
        }

        /* ============ Header / Navigation ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-nav);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.25rem;
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: inline-flex;
            align-items: center;
            gap: 0.55rem;
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.01em;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }

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

        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
        }

        .nav-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            padding: 0.45rem 0.85rem;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            white-space: nowrap;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }

        .nav-tab:hover {
            background: var(--bg-soft);
            color: var(--text);
        }

        .nav-tab.active {
            background: var(--accent);
            color: #fff;
            font-weight: 600;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.55rem 1.25rem;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            flex-shrink: 0;
            transition: all var(--transition-fast);
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
        }

        .nav-cta:hover {
            background: var(--primary-hover);
            color: #fff;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.35);
            transform: translateY(-1px);
        }

        /* ============ Breadcrumb ============ */
        .breadcrumb-section {
            padding: 1.75rem 0 2.25rem;
            background: var(--bg-soft);
            border-bottom: 1px solid var(--border);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.4rem;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }

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

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

        .breadcrumb .sep {
            color: var(--border-strong);
            user-select: none;
        }

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

        .category-hero {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            max-width: 800px;
        }

        .category-hero h1 {
            font-size: clamp(30px, 4vw, 42px);
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.02em;
        }

        .category-hero p {
            font-size: clamp(16px, 1.6vw, 18px);
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ============ Buttons / Chips / Badges ============ */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 0.65rem 1.5rem;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
            transform: translateY(-2px);
        }

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

        .btn-outline:hover {
            border-color: var(--primary);
            background: var(--bg-soft);
            color: var(--primary-hover);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 0.45rem 1rem;
            font-size: 14px;
        }

        .chip {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.45rem 1rem;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            background: var(--bg);
            border: 1px solid var(--border);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .chip:hover {
            border-color: var(--accent);
            background: var(--accent-soft);
            color: var(--primary);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        .badge-blue {
            background: var(--accent-soft);
            color: var(--primary);
        }

        .badge-green {
            background: var(--success-soft);
            color: var(--success);
        }

        .badge-warning {
            background: var(--warning-soft);
            color: var(--warning);
        }

        .badge-muted {
            background: var(--bg-alt);
            color: var(--text-muted);
            border: 1px solid var(--border);
        }

        /* ============ Cards ============ */
        .card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            overflow: hidden;
        }

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

        .card-image {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }

        .card-body {
            padding: 1.5rem;
        }

        .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.35;
        }

        .card-text {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 1rem;
        }

        .card-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.75rem;
            font-size: 13px;
            color: var(--text-muted);
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: all var(--transition-fast);
        }

        .card-link:hover {
            color: var(--primary-hover);
            gap: 0.6rem;
        }

        /* ============ Solution Cards (Category page) ============ */
        .solution-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.75rem;
        }

        .solution-card {
            display: flex;
            flex-direction: column;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            overflow: hidden;
        }

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

        .solution-card .card-image-wrap {
            position: relative;
            overflow: hidden;
        }

        .solution-card .card-image-wrap img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

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

        .solution-card .badge {
            position: absolute;
            top: 0.85rem;
            left: 0.85rem;
            z-index: 2;
        }

        .solution-card .card-body {
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .solution-card .card-text {
            flex: 1;
        }

        .solution-card .card-meta {
            margin-top: auto;
            padding-top: 0.75rem;
            border-top: 1px solid var(--border);
        }

        /* ============ Featured / Horizontal cards ============ */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.75rem;
        }

        .featured-card {
            display: flex;
            gap: 1.25rem;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            padding: 1.25rem;
            transition: all var(--transition-base);
        }

        .featured-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-soft);
            transform: translateY(-3px);
        }

        .featured-card img {
            width: 180px;
            height: 120px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }

        .featured-card .featured-content {
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .featured-card .featured-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }

        .featured-card .featured-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            flex: 1;
            margin-bottom: 0.75rem;
        }

        /* ============ Stats ============ */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        .stat-item {
            text-align: center;
            padding: 1.5rem 1rem;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }

        .stat-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-soft);
            transform: translateY(-2px);
        }

        .stat-number {
            font-family: var(--font-en);
            font-size: 2.25rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.02em;
            margin-bottom: 0.25rem;
        }

        .stat-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
        }

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

        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 0.85rem;
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            border-color: var(--border-strong);
        }

        .faq-item.active {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.08);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.25rem 1.5rem;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            transition: all var(--transition-fast);
        }

        .faq-question:hover {
            background: var(--bg-alt);
        }

        .faq-question .faq-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--bg-soft);
            color: var(--primary);
            font-size: 16px;
            flex-shrink: 0;
            transition: all var(--transition-fast);
        }

        .faq-item.active .faq-icon {
            background: var(--accent);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base);
        }

        .faq-answer-inner {
            padding: 0 1.5rem 1.25rem;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.75;
        }

        /* ============ CTA / Form ============ */
        .cta-section {
            background: linear-gradient(135deg, #FFFFFF 0%, #EFF6FF 100%);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .cta-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2.5rem;
            align-items: center;
        }

        .cta-content h2 {
            font-size: clamp(24px, 2.8vw, 32px);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.75rem;
        }

        .cta-content p {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 1.5rem;
        }

        .cta-promise {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            margin-bottom: 1.5rem;
        }

        .cta-promise span {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-body);
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            padding: 0.3rem 0.8rem;
        }

        .cta-form {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 1.75rem;
        }

        .cta-form h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 1.25rem;
        }

        .form-group {
            margin-bottom: 1rem;
        }

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            margin-bottom: 0.4rem;
        }

        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.6rem 1rem;
            font-size: 15px;
            color: var(--text);
            background: var(--bg-alt);
            border: 1.5px solid var(--border);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

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

        .form-submit {
            width: 100%;
            padding: 0.7rem 1.5rem;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            transition: all var(--transition-fast);
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
        }

        .form-submit:hover {
            background: var(--primary-hover);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
            transform: translateY(-1px);
        }

        .form-submit:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ============ Quick links / channel chips ============ */
        .channel-chips {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
        }

        .channel-chip {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.25rem;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            transition: all var(--transition-fast);
        }

        .channel-chip:hover {
            border-color: var(--accent);
            background: var(--accent-soft);
            color: var(--primary);
            transform: translateY(-1px);
        }

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

        /* ============ Footer ============ */
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding: 2.5rem 0 1.5rem;
        }

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

        .footer-brand .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
        }

        .footer-brand p {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #E2E8F0;
            margin-bottom: 0.85rem;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .footer-col a {
            font-size: 14px;
            color: #94A3B8;
            transition: all var(--transition-fast);
        }

        .footer-col a:hover {
            color: #fff;
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.75rem;
            padding-top: 1.25rem;
            border-top: 1px solid #1E293B;
            font-size: 13px;
            color: #64748B;
        }

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

        .footer-bottom a:hover {
            color: #fff;
            text-decoration: underline;
            text-underline-offset: 3px;
        }

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

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

            .cta-wrapper {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            .nav-tabs {
                gap: 0.15rem;
            }

            .nav-tab {
                padding: 0.4rem 0.65rem;
                font-size: 13px;
            }

            .solution-grid {
                grid-template-columns: 1fr;
            }

            .featured-grid {
                grid-template-columns: 1fr;
            }

            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 0.85rem;
            }

            .stat-number {
                font-size: 1.75rem;
            }

            .featured-card {
                flex-direction: column;
            }

            .featured-card img {
                width: 100%;
                height: 160px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

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

            .breadcrumb-section {
                padding: 1.25rem 0 1.75rem;
            }
        }

        @media (max-width: 520px) {
            .nav-container {
                flex-wrap: wrap;
                gap: 0.75rem;
            }

            .nav-tabs {
                order: 3;
                width: 100%;
                overflow-x: auto;
            }

            .nav-cta {
                padding: 0.45rem 1rem;
                font-size: 13px;
            }

            .stats-row {
                grid-template-columns: 1fr;
            }

            .section {
                padding-top: calc(var(--section-pad) * 0.75);
                padding-bottom: calc(var(--section-pad) * 0.75);
            }

            .category-hero h1 {
                font-size: 26px;
            }

            .cta-form {
                padding: 1.25rem;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-soft: #3B82F6;
            --accent: #0EA5E9;
            --accent-soft: #E0F2FE;
            --bg: #FFFFFF;
            --bg-alt: #F8FAFC;
            --bg-soft: #EFF6FF;
            --text: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --border-strong: #CBD5E1;
            --success: #16A34A;
            --success-soft: #DCFCE7;
            --warning: #F59E0B;
            --warning-soft: #FEF3C7;
            --danger: #DC2626;
            --danger-soft: #FEE2E2;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-pill: 999px;
            --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.08), 0 8px 24px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 8px 16px rgba(37, 99, 235, 0.12), 0 24px 48px rgba(15, 23, 42, 0.10);
            --shadow-nav: 0 1px 2px rgba(15, 23, 42, 0.04), 0 4px 16px rgba(15, 23, 42, 0.04);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            --font-en: "Inter", "Segoe UI", system-ui, sans-serif;
            --section-pad: clamp(3.5rem, 7vw, 6.5rem);
            --container-pad: clamp(1.25rem, 4vw, 2.5rem);
            --container-max: 1200px;
            --transition-fast: 160ms ease;
            --transition-base: 240ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-cn);
            font-size: 16px;
            font-weight: 400;
            line-height: 1.7;
            color: var(--text-body);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-pad);
            padding-right: var(--container-pad);
        }

        .section {
            padding-top: var(--section-pad);
            padding-bottom: var(--section-pad);
        }

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

        .section-soft {
            background-color: var(--bg-soft);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--primary);
            background: var(--accent-soft);
            padding: 0.4rem 1rem;
            border-radius: var(--radius-pill);
            margin-bottom: 1rem;
            text-transform: none;
        }

        .section-heading {
            font-size: clamp(26px, 3.2vw, 34px);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: clamp(16px, 1.5vw, 18px);
            color: var(--text-muted);
            max-width: 720px;
            line-height: 1.7;
            margin-bottom: 2.5rem;
        }

        /* ============ Header / Navigation ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-nav);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.25rem;
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: inline-flex;
            align-items: center;
            gap: 0.55rem;
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.01em;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }

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

        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 0.35rem;
            overflow-x: auto;
            scrollbar-width: thin;
            scrollbar-color: var(--border-strong) transparent;
        }

        .nav-tabs::-webkit-scrollbar {
            height: 4px;
        }

        .nav-tabs::-webkit-scrollbar-track {
            background: transparent;
        }

        .nav-tabs::-webkit-scrollbar-thumb {
            background: var(--border-strong);
            border-radius: 4px;
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            padding: 0.45rem 1rem;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            border-radius: var(--radius-pill);
            white-space: nowrap;
            transition: background var(--transition-fast), color var(--transition-fast);
        }

        .nav-tab:hover {
            background: var(--bg-soft);
            color: var(--text);
        }

        .nav-tab.active {
            background: var(--accent);
            color: #fff;
            font-weight: 600;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            padding: 0.55rem 1.35rem;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            border-radius: var(--radius-sm);
            white-space: nowrap;
            flex-shrink: 0;
            transition: background var(--transition-fast);
        }

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

        /* ============ Breadcrumb ============ */
        .breadcrumb-section {
            padding-top: clamp(1.5rem, 3vw, 2.5rem);
            padding-bottom: clamp(1.5rem, 3vw, 2.5rem);
            background: var(--bg-alt);
            border-bottom: 1px solid var(--border);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 1rem;
            flex-wrap: wrap;
        }

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

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

        .breadcrumb .separator {
            color: var(--border-strong);
            user-select: none;
        }

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

        .category-hero-title {
            font-size: clamp(28px, 3.5vw, 38px);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.6rem;
            letter-spacing: -0.01em;
        }

        .category-hero-desc {
            font-size: 17px;
            color: var(--text-body);
            max-width: 780px;
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* ============ Case List Section ============ */
        .case-list-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.75rem;
        }

        .case-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
        }

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

        .case-card-img {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-soft);
        }

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

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

        .case-card-tag {
            position: absolute;
            top: 0.9rem;
            left: 0.9rem;
            display: inline-flex;
            align-items: center;
            padding: 0.3rem 0.85rem;
            font-size: 12px;
            font-weight: 600;
            color: #fff;
            background: rgba(37, 99, 235, 0.88);
            border-radius: var(--radius-pill);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
        }

        .case-card-body {
            padding: 1.5rem 1.5rem 1.35rem;
        }

        .case-card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.6rem;
            line-height: 1.45;
        }

        .case-card-excerpt {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 1rem;
        }

        .case-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 0.75rem;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: 0.85rem;
            flex-wrap: wrap;
        }

        .case-card-date {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
        }

        .case-card-link {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
        }

        .case-card-link:hover {
            color: var(--primary-hover);
        }

        .case-list-more {
            display: flex;
            justify-content: center;
            margin-top: 2.5rem;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.65rem 1.75rem;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            background: transparent;
            border: 1.5px solid var(--primary);
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast), color var(--transition-fast);
        }

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

        /* ============ Scene Navigation (Chips) ============ */
        .scene-chips-row {
            display: flex;
            flex-wrap: wrap;
            gap: 0.7rem;
            margin-bottom: 2rem;
        }

        .scene-chip {
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
            padding: 0.55rem 1.3rem;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
        }

        .scene-chip:hover {
            background: var(--accent-soft);
            border-color: var(--accent);
            color: var(--primary);
        }

        .scene-chip.active {
            background: var(--accent);
            border-color: var(--accent);
            color: #fff;
            font-weight: 600;
        }

        /* ============ Featured Spotlight ============ */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.75rem;
        }

        .featured-card {
            display: flex;
            flex-direction: column;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
        }

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

        .featured-card-img {
            aspect-ratio: 16 / 8;
            overflow: hidden;
            background: var(--bg-soft);
        }

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

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

        .featured-card-body {
            padding: 1.35rem 1.5rem 1.25rem;
        }

        .featured-card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.45;
        }

        .featured-card-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 0.75rem;
        }

        .featured-card-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
        }

        .featured-card-link:hover {
            color: var(--primary-hover);
        }

        /* ============ Stats Strip ============ */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        .stat-card {
            text-align: center;
            padding: 1.75rem 1.25rem;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
        }

        .stat-number {
            font-family: var(--font-en);
            font-size: clamp(28px, 3vw, 38px);
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.4rem;
            line-height: 1.2;
        }

        .stat-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
        }

        /* ============ FAQ Accordion ============ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.9rem;
            max-width: 840px;
        }

        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast);
        }

        .faq-item.active {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.08);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            width: 100%;
            padding: 1.1rem 1.4rem;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            transition: color var(--transition-fast);
        }

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

        .faq-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            color: var(--text-muted);
            transition: transform var(--transition-base), color var(--transition-fast);
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base);
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 1.4rem 1.25rem;
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.7;
        }

        /* ============ CTA Section ============ */
        .cta-panel {
            background: var(--primary);
            border-radius: var(--radius-lg);
            padding: clamp(2.5rem, 5vw, 4rem) clamp(1.5rem, 4vw, 3.5rem);
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 2.5rem;
            align-items: center;
            position: relative;
            overflow: hidden;
        }

        .cta-panel::before {
            content: "";
            position: absolute;
            top: -40%;
            right: -15%;
            width: 55%;
            aspect-ratio: 1 / 1;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-panel::after {
            content: "";
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 40%;
            aspect-ratio: 1 / 1;
            background: rgba(14, 165, 233, 0.15);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-panel-content {
            position: relative;
            z-index: 1;
        }

        .cta-panel-title {
            font-size: clamp(24px, 2.8vw, 30px);
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.75rem;
            line-height: 1.35;
        }

        .cta-panel-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            margin-bottom: 1.5rem;
        }

        .cta-panel-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.9rem;
        }

        .btn-white {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 1.8rem;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            background: #fff;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast), transform var(--transition-fast);
        }

        .btn-white:hover {
            background: #EFF6FF;
            color: var(--primary-hover);
            transform: translateY(-1px);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 1.8rem;
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            background: transparent;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast), border-color var(--transition-fast);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
        }

        .cta-panel-form {
            position: relative;
            z-index: 1;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: var(--radius-md);
            padding: 1.75rem;
        }

        .form-group {
            margin-bottom: 1rem;
        }

        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 0.4rem;
        }

        .form-control {
            width: 100%;
            padding: 0.65rem 1rem;
            font-size: 14px;
            color: var(--text);
            background: rgba(255, 255, 255, 0.95);
            border: 1.5px solid transparent;
            border-radius: var(--radius-sm);
            outline: none;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .form-control:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.25);
        }

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

        .form-submit {
            width: 100%;
            padding: 0.7rem 1.5rem;
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            background: var(--accent);
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }

        .form-submit:hover {
            background: #0284C7;
        }

        .form-note {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 0.7rem;
            text-align: center;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: #0F172A;
            color: #CBD5E1;
            padding-top: clamp(3rem, 5vw, 4.5rem);
            padding-bottom: 1.5rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2.5rem;
        }

        .footer-brand p {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.75;
            margin-top: 0.85rem;
        }

        .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 0.55rem;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 0.55rem;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: #94A3B8;
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            flex-wrap: wrap;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 13px;
            color: #64748B;
        }

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

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

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .case-list-grid {
                grid-template-columns: 1fr 1fr;
            }

            .featured-grid {
                grid-template-columns: 1fr;
            }

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

            .cta-panel {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

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

        @media (max-width: 768px) {
            .nav-container {
                flex-wrap: wrap;
                gap: 0.6rem;
                padding-top: 0.6rem;
                padding-bottom: 0.6rem;
            }

            .nav-logo {
                font-size: 19px;
            }

            .nav-logo-icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }

            .nav-tabs {
                order: 3;
                width: 100%;
                overflow-x: auto;
                gap: 0.3rem;
                padding-bottom: 0.15rem;
            }

            .nav-tab {
                padding: 0.4rem 0.8rem;
                font-size: 13px;
            }

            .nav-cta {
                padding: 0.45rem 1.1rem;
                font-size: 13px;
            }

            .case-list-grid {
                grid-template-columns: 1fr;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.9rem;
            }

            .stat-card {
                padding: 1.25rem 0.9rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

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

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

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

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

            .breadcrumb {
                font-size: 13px;
            }

            .category-hero-title {
                font-size: 24px;
            }

            .case-card-body {
                padding: 1.15rem 1.15rem 1.1rem;
            }

            .featured-card-body {
                padding: 1.1rem 1.15rem 1rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-soft: #3B82F6;
            --accent: #0EA5E9;
            --accent-soft: #E0F2FE;
            --bg: #FFFFFF;
            --bg-alt: #F8FAFC;
            --bg-soft: #EFF6FF;
            --text: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --border-strong: #CBD5E1;
            --success: #16A34A;
            --success-soft: #DCFCE7;
            --warning: #F59E0B;
            --warning-soft: #FEF3C7;
            --danger: #DC2626;
            --danger-soft: #FEE2E2;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-pill: 999px;
            --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.08), 0 8px 24px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 8px 16px rgba(37, 99, 235, 0.12), 0 24px 48px rgba(15, 23, 42, 0.10);
            --shadow-nav: 0 1px 2px rgba(15, 23, 42, 0.04), 0 4px 16px rgba(15, 23, 42, 0.04);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            --font-en: "Inter", "Segoe UI", system-ui, sans-serif;
            --section-pad: clamp(3.5rem, 7vw, 6.5rem);
            --container-pad: clamp(1.25rem, 4vw, 2.5rem);
            --container-max: 1200px;
            --transition-fast: 160ms ease;
            --transition-base: 240ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-cn);
            font-size: 16px;
            font-weight: 400;
            line-height: 1.7;
            color: var(--text-body);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-hover);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-pad);
            padding-right: var(--container-pad);
        }
        .section {
            padding-top: var(--section-pad);
            padding-bottom: var(--section-pad);
        }
        .section-alt {
            background-color: var(--bg-alt);
        }
        .section-soft {
            background-color: var(--bg-soft);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--primary);
            background: var(--accent-soft);
            padding: 0.4rem 1rem;
            border-radius: var(--radius-pill);
            margin-bottom: 1rem;
            text-transform: none;
        }
        .section-heading {
            font-size: clamp(26px, 3.2vw, 34px);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: clamp(16px, 1.5vw, 18px);
            color: var(--text-muted);
            max-width: 720px;
            line-height: 1.7;
            margin-bottom: 2.5rem;
        }
        /* ============ Header / Navigation ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-nav);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
            flex-wrap: nowrap;
        }
        .nav-logo {
            display: inline-flex;
            align-items: center;
            gap: 0.55rem;
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.01em;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .nav-logo:hover {
            color: var(--text);
        }
        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 0.35rem;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            flex-wrap: nowrap;
        }
        .nav-tabs::-webkit-scrollbar {
            display: none;
        }
        .nav-tab {
            display: inline-flex;
            align-items: center;
            white-space: nowrap;
            padding: 0.45rem 0.95rem;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }
        .nav-tab:hover {
            color: var(--primary);
            background: var(--accent-soft);
        }
        .nav-tab.active {
            background: var(--accent);
            color: #fff;
            font-weight: 600;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            white-space: nowrap;
            background: var(--primary);
            color: #fff;
            padding: 0.55rem 1.3rem;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 600;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }
        .nav-cta:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
        }
        /* ============ Breadcrumb ============ */
        .breadcrumb-section {
            padding-top: 2rem;
            padding-bottom: 0;
        }
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb-nav a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb-nav a:hover {
            color: var(--primary);
        }
        .breadcrumb-nav .sep {
            color: var(--border-strong);
            user-select: none;
        }
        .breadcrumb-nav .current {
            color: var(--text);
            font-weight: 500;
        }
        /* ============ Category Header ============ */
        .category-header {
            padding-top: 2.25rem;
            padding-bottom: 1.5rem;
        }
        .category-header h1 {
            font-size: clamp(32px, 4.5vw, 44px);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 1rem;
            letter-spacing: -0.01em;
        }
        .category-header .lead {
            font-size: clamp(16px, 1.6vw, 18px);
            color: var(--text-muted);
            max-width: 780px;
        }
        /* ============ Tutorial List Cards ============ */
        .tutorial-list {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .tutorial-card {
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: 1.75rem;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 1.25rem;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-card);
        }
        .tutorial-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(37, 99, 235, 0.35);
        }
        .tutorial-card-img {
            border-radius: var(--radius-md);
            overflow: hidden;
            height: 100%;
            min-height: 190px;
        }
        .tutorial-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .tutorial-card:hover .tutorial-card-img img {
            transform: scale(1.03);
        }
        .tutorial-card-body {
            display: flex;
            flex-direction: column;
            gap: 0.65rem;
        }
        .tutorial-card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        .tag-badge {
            display: inline-flex;
            padding: 0.25rem 0.8rem;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 500;
            background: var(--accent-soft);
            color: var(--primary);
        }
        .tag-badge.tag-alt {
            background: var(--success-soft);
            color: var(--success);
        }
        .tag-badge.tag-warn {
            background: var(--warning-soft);
            color: var(--warning);
        }
        .tutorial-card-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--text);
            margin: 0;
            line-height: 1.4;
        }
        .tutorial-card-title a {
            color: var(--text);
            transition: color var(--transition-fast);
        }
        .tutorial-card-title a:hover {
            color: var(--primary);
        }
        .tutorial-card-summary {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
            flex-grow: 1;
        }
        .tutorial-card-meta {
            display: flex;
            align-items: center;
            gap: 1rem;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-muted);
        }
        .tutorial-card-meta .date {
            font-weight: 500;
        }
        .tutorial-read-link {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: all var(--transition-fast);
        }
        .tutorial-read-link:hover {
            color: var(--primary-hover);
            gap: 0.6rem;
        }
        .view-more-wrap {
            text-align: center;
            margin-top: 2rem;
        }
        /* ============ Quick Nav Chips ============ */
        .chip-group {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-top: 1rem;
        }
        .chip-link {
            display: inline-flex;
            align-items: center;
            padding: 0.5rem 1.15rem;
            border-radius: var(--radius-pill);
            background: var(--bg);
            border: 1px solid var(--border);
            color: var(--text-body);
            font-size: 14px;
            font-weight: 500;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .chip-link:hover {
            background: var(--accent-soft);
            border-color: var(--accent);
            color: var(--primary);
        }
        /* ============ Editor Picks ============ */
        .editor-picks-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .editor-pick-card {
            display: flex;
            flex-direction: column;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-card);
            height: 100%;
        }
        .editor-pick-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(37, 99, 235, 0.35);
        }
        .editor-pick-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }
        .editor-pick-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .editor-pick-card:hover .editor-pick-img img {
            transform: scale(1.05);
        }
        .editor-pick-body {
            padding: 1.25rem 1.5rem 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            flex-grow: 1;
        }
        .editor-pick-label {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 0.04em;
        }
        .editor-pick-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin: 0;
            line-height: 1.45;
        }
        .editor-pick-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin: 0;
            flex-grow: 1;
        }
        /* ============ Stats Strip ============ */
        .stats-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .stat-block {
            text-align: center;
            padding: 2rem 1.5rem;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
        }
        .stat-block:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .stat-number {
            font-size: clamp(28px, 3vw, 40px);
            font-weight: 700;
            color: var(--primary);
            font-family: var(--font-en);
            letter-spacing: -0.02em;
            margin-bottom: 0.35rem;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }
        /* ============ FAQ Styles ============ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.85rem;
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item[open] {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.1rem 1.5rem;
            cursor: pointer;
            font-weight: 600;
            color: var(--text);
            font-size: 16px;
            list-style: none;
            user-select: none;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question::-webkit-details-marker {
            display: none;
        }
        .faq-question .faq-icon {
            font-size: 20px;
            color: var(--text-muted);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
            margin-left: 1rem;
        }
        .faq-item[open] .faq-question .faq-icon {
            transform: rotate(180deg);
            color: var(--accent);
        }
        .faq-answer {
            padding: 0 1.5rem 1.25rem;
            color: var(--text-muted);
            font-size: 15px;
            line-height: 1.7;
        }
        /* ============ CTA / Subscribe Form ============ */
        .cta-section {
            background: linear-gradient(135deg, #EFF6FF 0%, #F8FAFC 100%);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .cta-panel {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .cta-info h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }
        .cta-info p {
            font-size: 16px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 1.25rem;
        }
        .cta-points {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .cta-points li {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 15px;
            color: var(--text-body);
        }
        .cta-points li::before {
            content: "✓";
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: var(--success-soft);
            color: var(--success);
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .cta-form-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            box-shadow: var(--shadow-card);
        }
        .cta-form-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 1.25rem;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            margin-bottom: 0.4rem;
        }
        .form-control {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-sm);
            background: var(--bg-alt);
            font-size: 15px;
            color: var(--text);
            transition: all var(--transition-fast);
            outline: none;
        }
        .form-control:focus {
            border-color: var(--primary);
            background: var(--bg);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
        }
        .form-control::placeholder {
            color: var(--text-muted);
        }
        textarea.form-control {
            min-height: 100px;
            resize: vertical;
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 100%;
            padding: 0.75rem 1.5rem;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .btn-primary-custom:hover {
            background: var(--primary-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
            color: #fff;
        }
        .btn-primary-custom:focus {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .form-note {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 0.75rem;
        }
        /* ============ Footer ============ */
        .site-footer {
            background: #0F172A;
            color: #CBD5E1;
            padding-top: 3.5rem;
            padding-bottom: 1.5rem;
        }
        .site-footer a {
            color: #CBD5E1;
            transition: color var(--transition-fast);
        }
        .site-footer a:hover {
            color: var(--accent);
            text-decoration: underline;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #94A3B8;
            margin-top: 1rem;
            max-width: 360px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 0.55rem;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 0.55rem;
        }
        .footer-col ul li {
            font-size: 14px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.75rem;
            padding-top: 1.5rem;
            font-size: 13px;
            color: #94A3B8;
        }
        .footer-bottom a {
            font-size: 13px;
        }
        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .editor-picks-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
            }
            .tutorial-card {
                grid-template-columns: 220px 1fr;
            }
        }
        @media (max-width: 768px) {
            .nav-container {
                flex-wrap: wrap;
                gap: 0.5rem;
            }
            .nav-logo {
                font-size: 18px;
            }
            .nav-logo-icon {
                width: 30px;
                height: 30px;
                font-size: 15px;
            }
            .nav-tabs {
                order: 3;
                width: 100%;
                overflow-x: auto;
                padding-bottom: 0.25rem;
            }
            .nav-cta {
                padding: 0.45rem 1rem;
                font-size: 13px;
            }
            .tutorial-card {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .tutorial-card-img {
                min-height: auto;
                aspect-ratio: 16 / 9;
            }
            .editor-picks-grid {
                grid-template-columns: 1fr;
            }
            .cta-panel {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 576px) {
            .stats-strip {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .category-header h1 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.25rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 0.5rem;
            }
            .tutorial-card {
                padding: 1rem;
            }
            .tutorial-card-title {
                font-size: 17px;
            }
            .chip-group {
                gap: 0.4rem;
            }
            .chip-link {
                padding: 0.4rem 0.85rem;
                font-size: 13px;
            }
            .cta-form-card {
                padding: 1.5rem;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-soft: #3B82F6;
            --accent: #0EA5E9;
            --accent-soft: #E0F2FE;
            --bg: #FFFFFF;
            --bg-alt: #F8FAFC;
            --bg-soft: #EFF6FF;
            --text: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --border-strong: #CBD5E1;
            --success: #16A34A;
            --success-soft: #DCFCE7;
            --warning: #F59E0B;
            --warning-soft: #FEF3C7;
            --danger: #DC2626;
            --danger-soft: #FEE2E2;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-pill: 999px;
            --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.08), 0 8px 24px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 8px 16px rgba(37, 99, 235, 0.12), 0 24px 48px rgba(15, 23, 42, 0.10);
            --shadow-nav: 0 1px 2px rgba(15, 23, 42, 0.04), 0 4px 16px rgba(15, 23, 42, 0.04);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            --font-en: "Inter", "Segoe UI", system-ui, sans-serif;
            --section-pad: clamp(3.5rem, 7vw, 6.5rem);
            --container-pad: clamp(1.25rem, 4vw, 2.5rem);
            --container-max: 1200px;
            --transition-fast: 160ms ease;
            --transition-base: 240ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-cn);
            font-size: 16px;
            font-weight: 400;
            line-height: 1.7;
            color: var(--text-body);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-pad);
            padding-right: var(--container-pad);
        }

        .section {
            padding-top: var(--section-pad);
            padding-bottom: var(--section-pad);
        }

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

        .section-soft {
            background-color: var(--bg-soft);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--primary);
            background: var(--accent-soft);
            padding: 0.4rem 1rem;
            border-radius: var(--radius-pill);
            margin-bottom: 1rem;
            text-transform: none;
        }

        .section-heading {
            font-size: clamp(26px, 3.2vw, 34px);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }

        .section-subtitle {
            font-size: clamp(16px, 1.5vw, 18px);
            color: var(--text-muted);
            max-width: 720px;
            line-height: 1.7;
            margin-bottom: 2.5rem;
        }

        /* ============ Header / Navigation ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-nav);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.25rem;
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: inline-flex;
            align-items: center;
            gap: 0.55rem;
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.01em;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .nav-logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }

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

        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            padding: 0.1rem 0;
        }

        .nav-tabs::-webkit-scrollbar {
            display: none;
        }

        .nav-tab {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            background: transparent;
            padding: 0.5rem 1rem;
            border-radius: var(--radius-pill);
            white-space: nowrap;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }

        .nav-tab:hover {
            color: var(--text);
            background: var(--bg-soft);
        }

        .nav-tab.active {
            color: #fff;
            background: var(--accent);
            font-weight: 600;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            padding: 0.55rem 1.35rem;
            border-radius: var(--radius-sm);
            white-space: nowrap;
            flex-shrink: 0;
            transition: all var(--transition-fast);
        }

        .nav-cta:hover {
            color: #fff;
            background: var(--primary-hover);
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
        }

        /* ============ Breadcrumb ============ */
        .breadcrumb-wrap {
            background-color: var(--bg-alt);
            border-bottom: 1px solid var(--border);
            padding: 0.85rem 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

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

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

        .breadcrumb .sep {
            color: var(--border-strong);
            user-select: none;
        }

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

        /* ============ Category Hero ============ */
        .cat-hero {
            background-color: var(--bg);
            padding-top: clamp(2.5rem, 5vw, 4rem);
            padding-bottom: clamp(2.5rem, 5vw, 4rem);
        }

        .cat-hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }

        .cat-hero-content h1 {
            font-size: clamp(32px, 4.5vw, 44px);
            font-weight: 700;
            color: var(--text);
            line-height: 1.2;
            letter-spacing: -0.01em;
            margin-bottom: 1rem;
        }

        .cat-hero-content .cat-desc {
            font-size: 17px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 560px;
            margin-bottom: 1.5rem;
        }

        .cat-hero-stats {
            display: flex;
            gap: 2rem;
            flex-wrap: wrap;
            margin-top: 0.5rem;
        }

        .cat-hero-stat {
            display: flex;
            flex-direction: column;
            gap: 0.2rem;
        }

        .cat-hero-stat .stat-num {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            font-family: var(--font-en);
            line-height: 1.2;
        }

        .cat-hero-stat .stat-label {
            font-size: 13px;
            color: var(--text-muted);
        }

        .cat-hero-image {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            aspect-ratio: 16 / 10;
        }

        .cat-hero-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ============ Tech Article Grid ============ */
        .tech-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .tech-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

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

        .tech-card .card-image {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background-color: var(--bg-soft);
        }

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

        .tech-card:hover .card-image img {
            transform: scale(1.05);
        }

        .tech-card .card-body {
            padding: 1.25rem 1.25rem 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
            flex: 1;
        }

        .tech-card .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--accent-soft);
            padding: 0.25rem 0.75rem;
            border-radius: var(--radius-pill);
            align-self: flex-start;
        }

        .tech-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.35;
            margin: 0;
        }

        .tech-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
        }

        .tech-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            padding-top: 0.5rem;
            border-top: 1px solid var(--border);
        }

        .tech-card .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: color var(--transition-fast);
        }

        .tech-card .card-link:hover {
            color: var(--primary-hover);
        }

        /* ============ Tech Chips ============ */
        .chips-wrap {
            display: flex;
            gap: 0.6rem;
            flex-wrap: wrap;
            align-items: center;
        }

        .tech-chip {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            background: var(--bg);
            border: 1px solid var(--border);
            padding: 0.5rem 1.1rem;
            border-radius: var(--radius-pill);
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
        }

        .tech-chip:hover {
            color: var(--primary);
            border-color: var(--primary-soft);
            background: var(--bg-soft);
        }

        .tech-chip.active {
            color: #fff;
            background: var(--accent);
            border-color: var(--accent);
            font-weight: 600;
        }

        /* ============ Feature Horizontal Cards ============ */
        .feature-horizontal-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .feature-h-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }

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

        .feature-h-card .fh-image {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background-color: var(--bg-soft);
        }

        .feature-h-card .fh-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .feature-h-card:hover .fh-image img {
            transform: scale(1.04);
        }

        .feature-h-card .fh-body {
            padding: 1.2rem 1.25rem 1.4rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            flex: 1;
        }

        .feature-h-card .fh-label {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            text-transform: none;
            letter-spacing: 0.03em;
        }

        .feature-h-card h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.35;
            margin: 0;
        }

        .feature-h-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
        }

        .feature-h-card .fh-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            align-self: flex-start;
            transition: color var(--transition-fast);
        }

        .feature-h-card .fh-link:hover {
            color: var(--primary-hover);
        }

        /* ============ Metrics Bar ============ */
        .metrics-bar {
            background: var(--text);
            border-radius: var(--radius-lg);
            padding: 2.5rem 2rem;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            margin-top: 2rem;
        }

        .metric-item {
            display: flex;
            flex-direction: column;
            gap: 0.3rem;
            text-align: center;
        }

        .metric-item .metric-num {
            font-size: 36px;
            font-weight: 700;
            color: #fff;
            font-family: var(--font-en);
            line-height: 1.2;
        }

        .metric-item .metric-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }

        .metric-item .metric-desc {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
        }

        /* ============ FAQ ============ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.85rem;
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--border-strong);
        }

        .faq-item.open {
            border-color: var(--primary-soft);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.08);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.1rem 1.3rem;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.5;
            user-select: none;
            text-align: left;
            width: 100%;
        }

        .faq-question .faq-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-soft);
            color: var(--primary);
            font-size: 16px;
            font-weight: 600;
            flex-shrink: 0;
            transition: all var(--transition-base);
        }

        .faq-item.open .faq-question .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            padding: 0 1.3rem 1.2rem;
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        /* ============ CTA ============ */
        .cta-section {
            background: var(--text);
            border-radius: var(--radius-lg);
            padding: clamp(2.5rem, 5vw, 4rem) 2rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60%;
            left: -20%;
            width: 60%;
            height: 200%;
            background: radial-gradient(ellipse at center, rgba(37, 99, 235, 0.3), transparent 70%);
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -50%;
            right: -10%;
            width: 50%;
            height: 180%;
            background: radial-gradient(ellipse at center, rgba(14, 165, 233, 0.2), transparent 70%);
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 1;
            max-width: 680px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: clamp(26px, 3.5vw, 36px);
            font-weight: 700;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 1rem;
        }

        .cta-content p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 2rem;
            line-height: 1.7;
        }

        .cta-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            background: var(--primary);
            padding: 0.75rem 2rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-primary:hover {
            color: #fff;
            background: var(--primary-hover);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
            transform: translateY(-2px);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.35);
            padding: 0.75rem 2rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .btn-secondary:hover {
            color: #fff;
            border-color: rgba(255, 255, 255, 0.7);
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-2px);
        }

        .cta-note {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 1.2rem;
        }

        /* ============ Footer ============ */
        .site-footer {
            background-color: var(--text);
            color: rgba(255, 255, 255, 0.7);
            padding: clamp(3rem, 5vw, 4.5rem) 0 2rem;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }

        .footer-brand {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 0.55rem;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.01em;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.6rem;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition-fast);
        }

        .footer-col ul li a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            flex-wrap: wrap;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            font-size: 13px;
        }

        .footer-bottom span {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            flex-wrap: wrap;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition-fast);
        }

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

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .tech-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-horizontal-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .metrics-bar {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }
            .cat-hero-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .cat-hero-image {
                max-width: 600px;
                margin: 0 auto;
            }
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr;
            }
            .nav-cta {
                padding: 0.5rem 1rem;
                font-size: 13px;
            }
        }

        @media (max-width: 768px) {
            .nav-container {
                flex-wrap: wrap;
                gap: 0.6rem;
                padding-top: 0.6rem;
                padding-bottom: 0.6rem;
            }
            .nav-tabs {
                order: 3;
                width: 100%;
                overflow-x: auto;
                padding-bottom: 0.2rem;
                justify-content: flex-start;
            }
            .nav-tab {
                font-size: 13px;
                padding: 0.4rem 0.8rem;
            }
            .nav-cta {
                font-size: 13px;
                padding: 0.45rem 0.9rem;
            }
            .tech-grid {
                grid-template-columns: 1fr;
            }
            .feature-horizontal-grid {
                grid-template-columns: 1fr;
            }
            .metrics-bar {
                grid-template-columns: 1fr 1fr;
                gap: 1.2rem;
                padding: 1.8rem 1.2rem;
            }
            .metric-item .metric-num {
                font-size: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.8rem;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.8rem;
            }
            .cat-hero-stats {
                gap: 1.2rem;
            }
            .cat-hero-stat .stat-num {
                font-size: 22px;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                max-width: 340px;
            }
        }

        @media (max-width: 520px) {
            .metrics-bar {
                grid-template-columns: 1fr;
                gap: 1.2rem;
                padding: 1.5rem 1.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-brand {
                max-width: 100%;
            }
            .cat-hero-content h1 {
                font-size: clamp(26px, 7vw, 32px);
            }
            .tech-card .card-body {
                padding: 1rem 1rem 1.2rem;
            }
            .tech-card h3 {
                font-size: 16px;
            }
        }

/* roulang page: category6 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-soft: #3B82F6;
            --accent: #0EA5E9;
            --accent-soft: #E0F2FE;
            --bg: #FFFFFF;
            --bg-alt: #F8FAFC;
            --bg-soft: #EFF6FF;
            --text: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --border-strong: #CBD5E1;
            --success: #16A34A;
            --success-soft: #DCFCE7;
            --warning: #F59E0B;
            --warning-soft: #FEF3C7;
            --danger: #DC2626;
            --danger-soft: #FEE2E2;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-pill: 999px;
            --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.08), 0 8px 24px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 8px 16px rgba(37, 99, 235, 0.12), 0 24px 48px rgba(15, 23, 42, 0.10);
            --shadow-nav: 0 1px 2px rgba(15, 23, 42, 0.04), 0 4px 16px rgba(15, 23, 42, 0.04);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            --font-en: "Inter", "Segoe UI", system-ui, sans-serif;
            --section-pad: clamp(3.5rem, 7vw, 6.5rem);
            --container-pad: clamp(1.25rem, 4vw, 2.5rem);
            --container-max: 1200px;
            --transition-fast: 160ms ease;
            --transition-base: 240ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-cn);
            font-size: 16px;
            font-weight: 400;
            line-height: 1.7;
            color: var(--text-body);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-hover);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        h1,
        h2,
        h3,
        h4,
        p {
            margin-top: 0;
            margin-bottom: 1rem;
        }
        ul,
        ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-pad);
            padding-right: var(--container-pad);
        }
        .section {
            padding-top: var(--section-pad);
            padding-bottom: var(--section-pad);
        }
        .section-alt {
            background-color: var(--bg-alt);
        }
        .section-soft {
            background-color: var(--bg-soft);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--primary);
            background: var(--accent-soft);
            padding: 0.4rem 1rem;
            border-radius: var(--radius-pill);
            margin-bottom: 1rem;
        }
        .section-heading {
            font-size: clamp(26px, 3.2vw, 34px);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: clamp(16px, 1.5vw, 18px);
            color: var(--text-muted);
            max-width: 720px;
            line-height: 1.7;
            margin-bottom: 2.5rem;
        }

        /* ============ Header / Navigation ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-nav);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.25rem;
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .nav-container::-webkit-scrollbar {
            display: none;
        }
        .nav-logo {
            display: inline-flex;
            align-items: center;
            gap: 0.55rem;
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.01em;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .nav-logo:hover {
            color: var(--text);
        }
        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 0.35rem;
            flex-wrap: nowrap;
        }
        .nav-tab {
            display: inline-flex;
            align-items: center;
            padding: 0.5rem 1rem;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            white-space: nowrap;
            transition: background var(--transition-fast), color var(--transition-fast);
        }
        .nav-tab:hover {
            background: var(--accent-soft);
            color: var(--primary);
        }
        .nav-tab.active {
            background: var(--accent);
            color: #fff;
            font-weight: 600;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.6rem 1.4rem;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: var(--radius-sm);
            white-space: nowrap;
            flex-shrink: 0;
            transition: background var(--transition-fast), transform var(--transition-fast);
        }
        .nav-cta:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-1px);
        }

        /* ============ Breadcrumb ============ */
        .breadcrumb-section {
            padding: 2rem 0 0.5rem;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.5rem;
            font-size: 14px;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb-separator {
            color: var(--border-strong);
            user-select: none;
        }
        .breadcrumb-current {
            color: var(--primary);
            font-weight: 500;
        }

        /* ============ Category Hero ============ */
        .cat-hero {
            padding-top: 2rem;
            padding-bottom: 3rem;
        }
        .cat-hero-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .cat-hero-title {
            font-size: clamp(30px, 4vw, 42px);
            font-weight: 700;
            color: var(--text);
            line-height: 1.25;
            letter-spacing: -0.01em;
            margin-bottom: 1rem;
        }
        .cat-hero-desc {
            font-size: 18px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 1.5rem;
            max-width: 560px;
        }
        .cat-hero-stats {
            display: flex;
            gap: 2rem;
            flex-wrap: wrap;
        }
        .cat-hero-stat {
            display: flex;
            flex-direction: column;
            gap: 0.25rem;
        }
        .cat-hero-stat-value {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary);
            font-family: var(--font-en);
        }
        .cat-hero-stat-label {
            font-size: 13px;
            color: var(--text-muted);
        }
        .cat-hero-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .cat-hero-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 16/10;
        }

        /* ============ Tool Cards Section ============ */
        .tool-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.75rem;
        }
        .tool-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .tool-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-soft);
        }
        .tool-card-image {
            aspect-ratio: 16/10;
            overflow: hidden;
            background: var(--bg-alt);
        }
        .tool-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .tool-card:hover .tool-card-image img {
            transform: scale(1.03);
        }
        .tool-card-body {
            padding: 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .tool-card-tag {
            display: inline-flex;
            align-items: center;
            font-size: 12px;
            font-weight: 500;
            color: var(--primary);
            background: var(--accent-soft);
            padding: 0.25rem 0.75rem;
            border-radius: var(--radius-pill);
            margin-bottom: 0.75rem;
            align-self: flex-start;
        }
        .tool-card-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.35;
        }
        .tool-card-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 1rem;
            flex: 1;
        }
        .tool-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: 0.75rem;
            margin-bottom: 0;
        }
        .tool-card-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }
        .tool-card-link:hover {
            color: var(--primary-hover);
        }

        /* ============ Quick Entry Chips ============ */
        .quick-entry-section {
            padding-top: 0;
        }
        .quick-entry-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
        }
        .quick-entry-chip {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 1.4rem;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            background: var(--bg);
            border: 1px solid var(--border);
            transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
            white-space: nowrap;
        }
        .quick-entry-chip:hover {
            background: var(--accent-soft);
            border-color: var(--accent);
            color: var(--primary);
            transform: translateY(-2px);
        }
        .quick-entry-chip.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        /* ============ Featured Tools / Editor Picks ============ */
        .featured-tools-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .featured-tool-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .featured-tool-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-soft);
        }
        .featured-tool-card-image {
            aspect-ratio: 16/10;
            overflow: hidden;
            background: var(--bg-alt);
        }
        .featured-tool-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .featured-tool-card:hover .featured-tool-card-image img {
            transform: scale(1.03);
        }
        .featured-tool-card-body {
            padding: 1.25rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .featured-tool-card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.35;
        }
        .featured-tool-card-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 0.75rem;
            flex: 1;
        }
        .featured-tool-card-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            margin-bottom: 0;
        }
        .featured-tool-card-link:hover {
            color: var(--primary-hover);
        }

        /* ============ Data / Ranking Section ============ */
        .ranking-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .ranking-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-base), box-shadow var(--transition-base);
        }
        .ranking-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .ranking-card-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            background: var(--accent-soft);
            color: var(--primary);
            border-radius: var(--radius-sm);
            font-size: 22px;
            margin-bottom: 0.75rem;
        }
        .ranking-card-value {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            font-family: var(--font-en);
            margin-bottom: 0.25rem;
        }
        .ranking-card-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .ranking-list {
            margin-top: 2rem;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .ranking-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 1rem 1.25rem;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-base), box-shadow var(--transition-base);
        }
        .ranking-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .ranking-item-rank {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: var(--bg-soft);
            color: var(--primary);
            font-weight: 700;
            font-size: 14px;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
            font-family: var(--font-en);
        }
        .ranking-item-rank.top1 {
            background: #FEF3C7;
            color: #B45309;
        }
        .ranking-item-rank.top2 {
            background: #F1F5F9;
            color: #475569;
        }
        .ranking-item-rank.top3 {
            background: #FEF9C3;
            color: #A16207;
        }
        .ranking-item-info {
            flex: 1;
        }
        .ranking-item-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.15rem;
        }
        .ranking-item-desc {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .ranking-item-tag {
            font-size: 12px;
            font-weight: 500;
            color: var(--success);
            background: var(--success-soft);
            padding: 0.2rem 0.6rem;
            border-radius: var(--radius-pill);
            white-space: nowrap;
        }

        /* ============ FAQ ============ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--primary-soft);
        }
        .faq-item.active {
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.15rem 1.5rem;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            background: none;
            border: none;
            cursor: pointer;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-alt);
            color: var(--text-muted);
            font-size: 18px;
            font-weight: 400;
            transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
            flex-shrink: 0;
        }
        .faq-item.active .faq-icon {
            background: var(--primary);
            color: #fff;
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 1.5rem;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.25rem;
        }
        .faq-answer p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ============ CTA Section ============ */
        .cta-section {
            padding-top: var(--section-pad);
            padding-bottom: var(--section-pad);
        }
        .cta-box {
            background: linear-gradient(135deg, #1E3A8A 0%, #2563EB 45%, #0EA5E9 100%);
            border-radius: var(--radius-xl);
            padding: clamp(2.5rem, 5vw, 4rem);
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 2.5rem;
            align-items: center;
            color: #fff;
        }
        .cta-box-title {
            font-size: clamp(26px, 3vw, 34px);
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 1rem;
            color: #fff;
        }
        .cta-box-desc {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .cta-form {
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.2);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .cta-form-input {
            width: 100%;
            padding: 0.7rem 1rem;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.3);
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            font-size: 15px;
            outline: none;
            transition: border-color var(--transition-fast), background var(--transition-fast);
        }
        .cta-form-input::placeholder {
            color: rgba(255, 255, 255, 0.7);
        }
        .cta-form-input:focus {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.25);
        }
        .cta-form-btn {
            width: 100%;
            padding: 0.75rem 1.5rem;
            background: #fff;
            color: var(--primary);
            font-size: 15px;
            font-weight: 700;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast), transform var(--transition-fast);
        }
        .cta-form-btn:hover {
            background: var(--accent-soft);
            transform: translateY(-2px);
        }
        .cta-form-btn:focus-visible {
            outline: 2px solid #fff;
            outline-offset: 2px;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding-top: 3.5rem;
            padding-bottom: 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 2rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 0.55rem;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-logo .nav-logo-icon {
            width: 32px;
            height: 32px;
            font-size: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-col a {
            font-size: 14px;
            color: #94A3B8;
            transition: color var(--transition-fast);
        }
        .footer-col a:hover {
            color: #fff;
            text-decoration: underline;
            text-decoration-color: var(--primary);
            text-underline-offset: 3px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 0.75rem;
            padding-top: 1.5rem;
            font-size: 13px;
            color: #64748B;
        }
        .footer-bottom a {
            color: #94A3B8;
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .cat-hero-content {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .cat-hero-desc {
                max-width: 100%;
            }
            .tool-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .featured-tools-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .ranking-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .nav-container {
                flex-wrap: nowrap;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
            }
            .nav-tabs {
                gap: 0.2rem;
            }
            .nav-tab {
                padding: 0.4rem 0.75rem;
                font-size: 13px;
            }
            .nav-cta {
                padding: 0.5rem 1rem;
                font-size: 13px;
            }
            .tool-grid {
                grid-template-columns: 1fr;
            }
            .featured-tools-grid {
                grid-template-columns: 1fr;
            }
            .ranking-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cta-box {
                grid-template-columns: 1fr;
                gap: 1.5rem;
                padding: 2rem 1.5rem;
            }
            .ranking-item {
                flex-wrap: wrap;
            }
            .ranking-item-tag {
                margin-left: auto;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 520px) {
            .nav-logo {
                font-size: 18px;
            }
            .nav-logo-icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }
            .nav-cta {
                padding: 0.45rem 0.85rem;
                font-size: 12px;
            }
            .cat-hero-title {
                font-size: 26px;
            }
            .cat-hero-stats {
                gap: 1rem;
            }
            .cat-hero-stat-value {
                font-size: 20px;
            }
            .ranking-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.25rem;
            }
            .quick-entry-chip {
                padding: 0.55rem 1rem;
                font-size: 13px;
            }
        }

/* roulang page: category5 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-soft: #3B82F6;
            --accent: #0EA5E9;
            --accent-soft: #E0F2FE;
            --bg: #FFFFFF;
            --bg-alt: #F8FAFC;
            --bg-soft: #EFF6FF;
            --text: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --border-strong: #CBD5E1;
            --success: #16A34A;
            --success-soft: #DCFCE7;
            --warning: #F59E0B;
            --warning-soft: #FEF3C7;
            --danger: #DC2626;
            --danger-soft: #FEE2E2;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-pill: 999px;
            --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.08), 0 8px 24px rgba(15, 23, 42, 0.06);
            --shadow-hover: 0 8px 16px rgba(37, 99, 235, 0.12), 0 24px 48px rgba(15, 23, 42, 0.10);
            --shadow-nav: 0 1px 2px rgba(15, 23, 42, 0.04), 0 4px 16px rgba(15, 23, 42, 0.04);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            --font-en: "Inter", "Segoe UI", system-ui, sans-serif;
            --section-pad: clamp(3.5rem, 7vw, 6.5rem);
            --container-pad: clamp(1.25rem, 4vw, 2.5rem);
            --container-max: 1200px;
            --transition-fast: 160ms ease;
            --transition-base: 240ms cubic-bezier(0.4, 0, 0.2, 1);
            --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-cn);
            font-size: 16px;
            font-weight: 400;
            line-height: 1.7;
            color: var(--text-body);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-hover);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-pad);
            padding-right: var(--container-pad);
        }
        .section {
            padding-top: var(--section-pad);
            padding-bottom: var(--section-pad);
        }
        .section-alt {
            background-color: var(--bg-alt);
        }
        .section-soft {
            background-color: var(--bg-soft);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--primary);
            background: var(--accent-soft);
            padding: 0.4rem 1rem;
            border-radius: var(--radius-pill);
            margin-bottom: 1rem;
            text-transform: none;
        }
        .section-heading {
            font-size: clamp(26px, 3.2vw, 34px);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: clamp(16px, 1.5vw, 18px);
            color: var(--text-muted);
            max-width: 720px;
            line-height: 1.7;
            margin-bottom: 2.5rem;
        }

        /* ============ Header / Navigation ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-nav);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.25rem;
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
            flex-wrap: nowrap;
        }
        .nav-logo {
            display: inline-flex;
            align-items: center;
            gap: 0.55rem;
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.01em;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .nav-logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .nav-logo:hover {
            color: var(--text);
        }
        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 0.35rem;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: thin;
            scrollbar-color: var(--border-strong) transparent;
            -webkit-overflow-scrolling: touch;
            padding: 0.1rem;
        }
        .nav-tabs::-webkit-scrollbar {
            height: 4px;
        }
        .nav-tabs::-webkit-scrollbar-track {
            background: transparent;
        }
        .nav-tabs::-webkit-scrollbar-thumb {
            background: var(--border-strong);
            border-radius: var(--radius-pill);
        }
        .nav-tab {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.5rem 1rem;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-muted);
            border-radius: var(--radius-pill);
            white-space: nowrap;
            flex-shrink: 0;
            transition: background-color var(--transition-fast), color var(--transition-fast);
        }
        .nav-tab:hover {
            background-color: var(--accent-soft);
            color: var(--primary);
        }
        .nav-tab.active {
            background-color: var(--accent);
            color: #fff;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.55rem 1.35rem;
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            background-color: var(--primary);
            border-radius: var(--radius-sm);
            white-space: nowrap;
            flex-shrink: 0;
            transition: background-color var(--transition-fast);
        }
        .nav-cta:hover {
            background-color: var(--primary-hover);
            color: #fff;
        }

        /* ============ Breadcrumb ============ */
        .breadcrumb-wrap {
            padding: 1.25rem 0 0;
            background-color: var(--bg);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 14px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb-sep {
            color: var(--border-strong);
            user-select: none;
        }
        .breadcrumb-current {
            color: var(--text);
            font-weight: 600;
        }

        /* ============ Page Intro ============ */
        .page-intro {
            padding: clamp(2.5rem, 5vw, 4rem) 0 clamp(2rem, 4vw, 3rem);
            background: linear-gradient(180deg, #F0F6FF 0%, #FFFFFF 100%);
            border-bottom: 1px solid var(--border);
        }
        .page-intro-grid {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            gap: 2rem;
            flex-wrap: wrap;
        }
        .page-intro-left {
            flex: 1 1 600px;
        }
        .page-intro-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: #fff;
            border: 1px solid var(--border);
            padding: 0.35rem 0.9rem;
            border-radius: var(--radius-pill);
            margin-bottom: 1.25rem;
            box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
        }
        .page-intro h1 {
            font-size: clamp(30px, 4vw, 42px);
            font-weight: 700;
            color: var(--text);
            line-height: 1.25;
            margin-bottom: 1rem;
            letter-spacing: -0.015em;
        }
        .page-intro-desc {
            font-size: clamp(16px, 1.4vw, 18px);
            color: var(--text-muted);
            max-width: 680px;
            line-height: 1.75;
        }
        .page-intro-meta {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            margin-top: 1.5rem;
            flex-wrap: wrap;
        }
        .page-intro-meta span {
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
            font-size: 13px;
            color: var(--text-muted);
        }
        .page-intro-meta .dot {
            width: 6px;
            height: 6px;
            background: var(--success);
            border-radius: 50%;
            display: inline-block;
        }

        /* ============ News List ============ */
        .news-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }
        .news-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-soft);
        }
        .news-card-media {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--bg-alt);
            position: relative;
        }
        .news-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .news-card:hover .news-card-media img {
            transform: scale(1.04);
        }
        .news-card-body {
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .news-card-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 0.75rem;
            margin-bottom: 0.75rem;
            flex-wrap: wrap;
        }
        .news-tag {
            display: inline-flex;
            align-items: center;
            padding: 0.22rem 0.7rem;
            font-size: 12px;
            font-weight: 600;
            border-radius: var(--radius-pill);
            background: var(--accent-soft);
            color: var(--primary);
        }
        .news-date {
            font-size: 13px;
            color: var(--text-muted);
            font-family: var(--font-en);
            font-weight: 500;
        }
        .news-card-title {
            font-size: 19px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 0.65rem;
            letter-spacing: -0.005em;
        }
        .news-card-excerpt {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 1.25rem;
            flex: 1;
        }
        .news-card-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: color var(--transition-fast), gap var(--transition-fast);
        }
        .news-card-link:hover {
            color: var(--primary-hover);
            gap: 0.6rem;
        }
        .news-card-link svg {
            width: 16px;
            height: 16px;
            flex-shrink: 0;
        }
        .news-more-wrap {
            margin-top: 2rem;
            text-align: center;
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 1.8rem;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            border: 1.5px solid var(--primary);
            border-radius: var(--radius-sm);
            background: #fff;
            transition: background-color var(--transition-fast), color var(--transition-fast);
        }
        .btn-outline:hover {
            background-color: var(--primary);
            color: #fff;
        }

        /* ============ Quick Links Chips ============ */
        .quick-links {
            display: flex;
            flex-wrap: wrap;
            gap: 0.7rem;
        }
        .quick-chip {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.6rem 1.3rem;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            cursor: pointer;
            transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
        }
        .quick-chip:hover {
            background: var(--accent-soft);
            border-color: var(--accent);
            color: var(--primary);
            transform: translateY(-2px);
        }
        .quick-chip .chip-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 20px;
            height: 20px;
            font-size: 12px;
            font-weight: 700;
            background: var(--bg-soft);
            border-radius: 50%;
            flex-shrink: 0;
        }

        /* ============ Featured / Editor Picks ============ */
        .featured-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .featured-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .featured-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-soft);
        }
        .featured-media {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-alt);
        }
        .featured-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .featured-card:hover .featured-media img {
            transform: scale(1.04);
        }
        .featured-body {
            padding: 1.4rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .featured-label {
            display: inline-flex;
            align-items: center;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--accent-soft);
            padding: 0.2rem 0.7rem;
            border-radius: var(--radius-pill);
            margin-bottom: 0.75rem;
            align-self: flex-start;
        }
        .featured-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }
        .featured-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.65;
            flex: 1;
        }
        .featured-link {
            margin-top: 1rem;
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: color var(--transition-fast);
        }
        .featured-link:hover {
            color: var(--primary-hover);
        }

        /* ============ Data Stats ============ */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.25rem;
        }
        .stat-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 1.8rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition-base), box-shadow var(--transition-base);
        }
        .stat-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        .stat-number {
            font-size: clamp(28px, 3vw, 40px);
            font-weight: 700;
            color: var(--primary);
            font-family: var(--font-en);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 0.4rem;
            font-weight: 500;
        }
        .stat-desc {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 0.3rem;
            opacity: 0.8;
        }

        /* ============ FAQ ============ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .faq-item.active {
            border-color: var(--accent);
            box-shadow: 0 4px 16px rgba(14, 165, 233, 0.08);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            width: 100%;
            padding: 1.1rem 1.5rem;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-soft);
            flex-shrink: 0;
            transition: background-color var(--transition-fast), transform var(--transition-base);
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            line-height: 1;
        }
        .faq-item.active .faq-icon {
            background: var(--accent-soft);
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-base), padding var(--transition-base);
            padding: 0 1.5rem;
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
            padding: 0 1.5rem 1.2rem;
        }
        .faq-answer p {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.7;
        }

        /* ============ CTA Section ============ */
        .cta-section {
            position: relative;
            background: linear-gradient(135deg, #1D4ED8 0%, #2563EB 50%, #0EA5E9 100%);
            border-radius: var(--radius-xl);
            overflow: hidden;
            padding: clamp(2.5rem, 5vw, 4rem);
            box-shadow: 0 16px 40px rgba(37, 99, 235, 0.18);
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 2rem;
            flex-wrap: wrap;
        }
        .cta-content {
            flex: 1 1 480px;
        }
        .cta-title {
            font-size: clamp(24px, 2.8vw, 32px);
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.7rem;
            letter-spacing: -0.01em;
        }
        .cta-text {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.88);
            max-width: 520px;
            line-height: 1.7;
            margin-bottom: 1.5rem;
        }
        .cta-points {
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
            margin-bottom: 1.5rem;
        }
        .cta-point {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.95);
            font-weight: 500;
        }
        .cta-point svg {
            width: 18px;
            height: 18px;
            flex-shrink: 0;
        }
        .cta-form-wrap {
            flex: 0 1 360px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .cta-form-title {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }
        .form-group {
            margin-bottom: 0.9rem;
        }
        .form-group input {
            width: 100%;
            padding: 0.75rem 1rem;
            font-size: 14px;
            color: var(--text);
            background: #fff;
            border: 1.5px solid transparent;
            border-radius: var(--radius-sm);
            outline: none;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .form-group input::placeholder {
            color: var(--text-muted);
            opacity: 0.7;
        }
        .form-group input:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.25);
        }
        .btn-white {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 100%;
            padding: 0.75rem 1.5rem;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            background: #fff;
            border-radius: var(--radius-sm);
            transition: background-color var(--transition-fast), transform var(--transition-fast);
        }
        .btn-white:hover {
            background: #F0F6FF;
            transform: translateY(-1px);
        }
        .cta-privacy {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 0.75rem;
            text-align: center;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: #0F172A;
            color: #CBD5E1;
            padding-top: clamp(3rem, 5vw, 4.5rem);
            padding-bottom: 1.5rem;
            margin-top: var(--section-pad);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand p {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.7;
            margin-top: 1rem;
            max-width: 340px;
        }
        .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 0.55rem;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.55rem;
        }
        .footer-col ul a {
            font-size: 14px;
            color: #94A3B8;
            transition: color var(--transition-fast), padding-left var(--transition-fast);
        }
        .footer-col ul a:hover {
            color: #fff;
            padding-left: 0.25rem;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            flex-wrap: wrap;
            padding-top: 1.5rem;
            font-size: 13px;
            color: #64748B;
        }
        .footer-bottom a {
            color: #94A3B8;
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ============ Responsive ============ */
        @media (max-width: 1024px) {
            .news-list {
                grid-template-columns: 1fr;
            }
            .featured-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
        }
        @media (max-width: 768px) {
            .nav-container {
                flex-wrap: wrap;
                gap: 0.75rem;
                padding-top: 0.6rem;
                padding-bottom: 0.6rem;
            }
            .nav-logo {
                font-size: 19px;
            }
            .nav-logo-icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }
            .nav-tabs {
                order: 3;
                width: 100%;
                overflow-x: auto;
                padding-bottom: 0.2rem;
            }
            .nav-tab {
                font-size: 13px;
                padding: 0.4rem 0.8rem;
            }
            .nav-cta {
                padding: 0.45rem 1rem;
                font-size: 13px;
            }
            .page-intro-grid {
                flex-direction: column;
            }
            .news-card-body {
                padding: 1.2rem;
            }
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.8rem;
            }
            .stat-card {
                padding: 1.2rem 1rem;
            }
            .cta-inner {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-form-wrap {
                width: 100%;
                flex: 1 1 auto;
            }
            .cta-section {
                padding: 2rem 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section {
                padding-top: calc(var(--section-pad) * 0.75);
                padding-bottom: calc(var(--section-pad) * 0.75);
            }
        }
        @media (max-width: 520px) {
            .news-card-top {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.4rem;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .page-intro h1 {
                font-size: 26px;
            }
            .breadcrumb {
                font-size: 13px;
            }
            .cta-points {
                gap: 0.8rem;
            }
        }

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