/* roulang page: index */
:root {
            --brand-900: #0D3B2E;
            --brand-700: #0F4C3A;
            --brand-500: #1F6B4F;
            --brand-100: #E5F0EA;
            --accent-600: #D9A441;
            --accent-100: #FAF0DC;
            --bg-page: #F5F3EE;
            --bg-card: #FFFFFF;
            --text-main: #1F2622;
            --text-sub: #4A5550;
            --line: #DCE3DE;
            --danger: #B94A3D;
            --success: #2E7D5B;
            --shadow-sm: 0 2px 8px rgba(13,59,46,0.04);
            --shadow-md: 0 8px 24px rgba(13,59,46,0.06);
            --shadow-lg: 0 16px 40px rgba(13,59,46,0.10);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-pill: 999px;
            --container: 1200px;
            --header-height: 72px;
        }

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

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            background-color: var(--bg-page);
            color: var(--text-main);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 150ms ease, background-color 150ms ease, border-color 150ms ease;
        }

        ul, ol {
            list-style: none;
        }

        button, input, select, textarea {
            font-family: inherit;
            font-size: 100%;
            line-height: 1.5;
            color: var(--text-main);
        }

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

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: 88px 0;
        }

        .section-alt {
            background-color: #FFFFFF;
        }

        .section-muted {
            background-color: #F0EDE6;
        }

        .section-head {
            max-width: 720px;
            margin-bottom: 48px;
        }

        .section-head h2 {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--brand-900);
            letter-spacing: 0.01em;
            margin-bottom: 16px;
        }

        .section-head p {
            font-size: 1.06rem;
            color: var(--text-sub);
            line-height: 1.8;
        }

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

        .text-brand {
            color: var(--brand-700);
        }

        .text-accent {
            color: var(--accent-600);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            background: var(--brand-100);
            color: var(--brand-700);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        .badge-accent {
            background: var(--accent-100);
            color: #8a6a1f;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 0 24px;
            height: 44px;
            border-radius: var(--radius-pill);
            font-size: 0.95rem;
            font-weight: 600;
            transition: background-color 150ms ease, border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
            white-space: nowrap;
        }

        .btn:focus-visible {
            outline: 3px solid var(--brand-500);
            outline-offset: 2px;
        }

        .btn-primary {
            background-color: var(--brand-700);
            color: #FFFFFF;
            border: 1px solid var(--brand-700);
        }

        .btn-primary:hover {
            background-color: var(--brand-900);
            border-color: var(--brand-900);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

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

        .btn-secondary {
            background-color: transparent;
            color: var(--brand-700);
            border: 1px solid var(--brand-700);
        }

        .btn-secondary:hover {
            background-color: var(--brand-100);
            border-color: var(--brand-500);
        }

        .btn-light {
            background-color: #FFFFFF;
            color: var(--brand-900);
            border: 1px solid var(--line);
        }

        .btn-light:hover {
            background-color: var(--brand-100);
            border-color: var(--brand-500);
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--line);
            height: var(--header-height);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--brand-900);
            letter-spacing: 0.01em;
        }

        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--brand-700);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .main-nav a {
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-main);
            padding: 8px 0;
            position: relative;
            transition: color 150ms ease;
        }

        .main-nav a:hover {
            color: var(--brand-700);
        }

        .main-nav a.active {
            color: var(--brand-700);
            font-weight: 600;
        }

        .main-nav a.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -4px;
            height: 3px;
            background-color: var(--brand-500);
            border-radius: 2px;
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--brand-900);
            border-radius: 2px;
            transition: transform 200ms ease, opacity 200ms ease;
        }

        /* Hero */
        .hero {
            position: relative;
            padding: 88px 0 80px;
            background: linear-gradient(135deg, #E8F1EC 0%, #F5F3EE 55%, #FDF7E9 100%);
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: radial-gradient(rgba(13,59,46,0.06) 1px, transparent 1px);
            background-size: 28px 28px;
            pointer-events: none;
        }

        .hero .container {
            position: relative;
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 48px;
            align-items: center;
        }

        .hero-content {
            z-index: 1;
        }

        .hero-tag {
            display: inline-block;
            background: rgba(255,255,255,0.7);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(13,59,46,0.1);
            border-radius: var(--radius-pill);
            padding: 8px 16px;
            font-size: 0.85rem;
            color: var(--brand-700);
            margin-bottom: 24px;
            font-weight: 500;
        }

        .hero h1 {
            font-size: 2.8rem;
            font-weight: 700;
            line-height: 1.25;
            color: var(--brand-900);
            letter-spacing: 0.01em;
            margin-bottom: 24px;
        }

        .hero-sub {
            font-size: 1.1rem;
            color: var(--text-sub);
            line-height: 1.8;
            max-width: 560px;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .hero-visual {
            position: relative;
            z-index: 1;
            display: flex;
            justify-content: center;
        }

        .hero-image-wrapper {
            width: 100%;
            max-width: 520px;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            background-color: #fff;
            border: 1px solid var(--line);
        }

        .hero-image-wrapper img {
            width: 100%;
            height: auto;
            object-fit: cover;
            display: block;
        }

        .hero-data-card {
            position: absolute;
            bottom: 24px;
            left: -20px;
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(8px);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 16px 20px;
            box-shadow: var(--shadow-md);
            min-width: 200px;
        }

        .hero-data-card .data-label {
            font-size: 0.8rem;
            color: var(--text-sub);
        }

        .hero-data-card .data-value {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--brand-700);
        }

        /* Trust metrics */
        .trust-strip {
            padding: 32px 0;
            background-color: var(--brand-900);
            color: #FFFFFF;
        }

        .trust-strip .container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .trust-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .trust-item .trust-number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent-600);
            line-height: 1.1;
        }

        .trust-item .trust-label {
            font-size: 0.9rem;
            color: #B8C5BF;
        }

        /* Matrix */
        .matrix-grid {
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            grid-template-rows: auto auto;
            gap: 24px;
        }

        .matrix-card {
            background: var(--bg-card);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 32px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 150ms ease, border-color 150ms ease, transform 150ms ease;
            display: flex;
            flex-direction: column;
            position: relative;
            overflow: hidden;
        }

        .matrix-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--brand-500);
            transform: translateY(-2px);
        }

        .matrix-card.large {
            grid-row: span 2;
            justify-content: flex-end;
            min-height: 360px;
            background: linear-gradient(145deg, #0D3B2E 0%, #1F6B4F 100%);
            color: #FFFFFF;
            border: none;
        }

        .matrix-card.large .badge {
            background: rgba(255,255,255,0.15);
            color: #fff;
        }

        .matrix-card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--brand-100);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        .matrix-card.large .card-icon {
            background: rgba(255,255,255,0.15);
        }

        .matrix-card h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--brand-900);
        }

        .matrix-card.large h3 {
            color: #fff;
            font-size: 1.8rem;
        }

        .matrix-card p {
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .matrix-card.large p {
            color: rgba(255,255,255,0.8);
        }

        .matrix-card .card-link {
            margin-top: auto;
            font-weight: 600;
            color: var(--brand-700);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .matrix-card.large .card-link {
            color: #fff;
        }

        /* Source network */
        .source-network {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .source-visual {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--line);
            min-height: 320px;
            background-color: #E8F1EC;
            position: relative;
        }

        .source-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
        }

        .source-content h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--brand-900);
            margin-bottom: 16px;
        }

        .source-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin: 24px 0;
        }

        .source-tags span {
            background: var(--bg-card);
            border: 1px solid var(--line);
            border-radius: var(--radius-pill);
            padding: 6px 16px;
            font-size: 0.85rem;
            color: var(--text-sub);
            transition: border-color 150ms ease, background-color 150ms ease;
        }

        .source-tags span:hover {
            border-color: var(--brand-500);
            background: var(--brand-100);
        }

        .source-content p {
            color: var(--text-sub);
            line-height: 1.8;
        }

        /* Category grid */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .category-tile {
            background: var(--bg-card);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 150ms ease, border-color 150ms ease, transform 150ms ease;
        }

        .category-tile:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--brand-500);
            transform: translateY(-2px);
        }

        .tile-img {
            position: relative;
            height: 160px;
            background-color: #E8F1EC;
            overflow: hidden;
        }

        .tile-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 300ms ease;
        }

        .category-tile:hover .tile-img img {
            transform: scale(1.03);
        }

        .tile-badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(13,59,46,0.85);
            color: #fff;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 0.75rem;
            font-weight: 600;
            backdrop-filter: blur(4px);
        }

        .tile-body {
            padding: 16px;
        }

        .tile-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--brand-900);
            margin-bottom: 4px;
        }

        .tile-body .specs {
            font-size: 0.85rem;
            color: var(--text-sub);
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        /* Smart matching demo */
        .matching-demo {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: start;
        }

        .matching-filters {
            background: var(--bg-card);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 32px;
            box-shadow: var(--shadow-sm);
        }

        .filter-row {
            display: flex;
            flex-direction: column;
            gap: 8px;
            margin-bottom: 24px;
        }

        .filter-row label {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-main);
        }

        .filter-row select,
        .filter-row input[type="range"] {
            width: 100%;
            height: 44px;
            padding: 0 14px;
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            background-color: #fff;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 150ms ease, box-shadow 150ms ease;
        }

        .filter-row select:focus,
        .filter-row input[type="range"]:focus {
            border-color: var(--brand-700);
            box-shadow: 0 0 0 4px rgba(31,107,79,0.1);
        }

        .range-value {
            display: flex;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--text-sub);
        }

        .matching-result {
            background: var(--brand-900);
            border-radius: var(--radius-md);
            padding: 32px;
            color: #fff;
            box-shadow: var(--shadow-md);
            min-height: 320px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .matching-result h4 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--accent-600);
        }

        .result-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }

        .result-item:last-child {
            border-bottom: none;
        }

        .result-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
        }

        .result-text {
            font-size: 0.95rem;
        }

        .result-text strong {
            display: block;
            font-size: 0.9rem;
            color: #B8C5BF;
            font-weight: 400;
        }

        /* Process */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }

        .step-item {
            background: var(--bg-card);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 28px;
            position: relative;
            transition: box-shadow 150ms ease, border-color 150ms ease;
        }

        .step-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--brand-500);
        }

        .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--brand-700);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 16px;
        }

        .step-item h4 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--brand-900);
            margin-bottom: 8px;
        }

        .step-item p {
            color: var(--text-sub);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* Quality & traceability */
        .quality-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .quality-visual {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--line);
        }

        .quality-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .quality-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .quality-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .quality-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--brand-100);
            color: var(--brand-700);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        .quality-item h5 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 4px;
        }

        .quality-item p {
            color: var(--text-sub);
            font-size: 0.95rem;
        }

        /* Dashboard */
        .dashboard {
            background: var(--brand-100);
            border-radius: var(--radius-md);
            padding: 40px;
            box-shadow: var(--shadow-sm);
        }

        .dashboard-metrics {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 32px;
        }

        .metric-card {
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            padding: 20px;
            text-align: center;
        }

        .metric-card .metric-value {
            font-size: 2rem;
            font-weight: 700;
            color: var(--brand-700);
        }

        .metric-card .metric-label {
            font-size: 0.85rem;
            color: var(--text-sub);
        }

        .chart-placeholder {
            height: 240px;
            background: #fff;
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-sub);
            font-size: 0.95rem;
            background-image: linear-gradient(0deg, rgba(31,107,79,0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(31,107,79,0.05) 1px, transparent 1px);
            background-size: 24px 24px;
        }

        /* Industry scenarios */
        .scenario-scroll {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            padding-bottom: 16px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }

        .scenario-card {
            flex: 0 0 280px;
            scroll-snap-align: start;
            background: var(--bg-card);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 150ms ease, transform 150ms ease, border-color 150ms ease;
        }

        .scenario-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--brand-500);
        }

        .scenario-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }

        .scenario-card .scenario-body {
            padding: 20px;
        }

        .scenario-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--brand-900);
            margin-bottom: 8px;
        }

        .scenario-card p {
            color: var(--text-sub);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* Partners */
        .partner-wall {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            justify-content: center;
        }

        .partner-logo {
            width: 160px;
            height: 70px;
            background: #FFFFFF;
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-sub);
            font-weight: 600;
            letter-spacing: 0.05em;
            box-shadow: var(--shadow-sm);
            transition: border-color 150ms ease, box-shadow 150ms ease;
        }

        .partner-logo:hover {
            border-color: var(--brand-500);
            box-shadow: var(--shadow-md);
        }

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

        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 150ms ease, transform 150ms ease, border-color 150ms ease;
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--brand-500);
        }

        .news-card-img {
            height: 180px;
            background-color: #E8F1EC;
            background-size: cover;
            background-position: center;
            position: relative;
        }

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

        .news-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
            font-size: 0.8rem;
            color: var(--text-sub);
        }

        .news-tag {
            background: var(--brand-100);
            color: var(--brand-700);
            padding: 2px 10px;
            border-radius: var(--radius-pill);
            font-weight: 500;
        }

        .news-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--brand-900);
            margin-bottom: 10px;
            line-height: 1.5;
        }

        .news-card p {
            color: var(--text-sub);
            font-size: 0.9rem;
            line-height: 1.6;
            margin-top: auto;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .empty-state {
            background: var(--bg-card);
            border: 1px dashed var(--line);
            border-radius: var(--radius-md);
            padding: 48px 24px;
            text-align: center;
            color: var(--text-sub);
            grid-column: 1 / -1;
        }

        /* FAQ */
        .faq-layout {
            display: grid;
            grid-template-columns: 1fr 1.4fr;
            gap: 48px;
            align-items: start;
        }

        .faq-head h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--brand-900);
            margin-bottom: 16px;
        }

        .faq-head p {
            color: var(--text-sub);
            line-height: 1.8;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            background: #fff;
            overflow: hidden;
            transition: border-color 150ms ease, background-color 150ms ease;
        }

        .faq-item.active {
            border-color: var(--brand-500);
            background: var(--brand-100);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            text-align: left;
            background: none;
            border: none;
        }

        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--brand-700);
            transition: transform 200ms ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 200ms ease;
        }

        .faq-item.active .faq-answer {
            max-height: 240px;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            color: var(--text-sub);
            line-height: 1.7;
            font-size: 0.95rem;
        }

        /* CTA */
        .cta-section {
            background: var(--brand-900);
            color: #fff;
            padding: 80px 0;
        }

        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .cta-left h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .cta-left p {
            color: #B8C5BF;
            line-height: 1.8;
        }

        .cta-form {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 32px;
            box-shadow: var(--shadow-lg);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .form-group.full-width {
            grid-column: 1 / -1;
        }

        .form-group label {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-main);
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            height: 46px;
            padding: 0 14px;
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
            background: #fff;
            font-size: 0.95rem;
            outline: none;
            transition: border-color 150ms ease, box-shadow 150ms ease;
        }

        .form-group textarea {
            height: 100px;
            padding: 12px 14px;
            resize: vertical;
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            border-color: var(--brand-700);
            box-shadow: 0 0 0 4px rgba(31,107,79,0.1);
        }

        .form-submit {
            grid-column: 1 / -1;
            display: flex;
            justify-content: flex-end;
        }

        /* Footer */
        .site-footer {
            background: var(--brand-900);
            color: #B8C5BF;
            padding: 64px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 48px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-brand p {
            color: #B8C5BF;
            font-size: 0.9rem;
            line-height: 1.8;
            max-width: 280px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            color: #B8C5BF;
            font-size: 0.9rem;
            padding: 4px 0;
            transition: color 150ms ease;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 24px;
            text-align: center;
            font-size: 0.85rem;
            color: #B8C5BF;
        }

        /* Mobile menu drawer */
        .mobile-drawer {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(13,59,46,0.4);
            z-index: 999;
            opacity: 0;
            pointer-events: none;
            transition: opacity 200ms ease;
        }

        .mobile-drawer.open {
            opacity: 1;
            pointer-events: auto;
        }

        .drawer-panel {
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            width: 80%;
            max-width: 320px;
            background: #fff;
            padding: 24px;
            display: flex;
            flex-direction: column;
            transform: translateX(100%);
            transition: transform 200ms ease;
            box-shadow: var(--shadow-lg);
        }

        .mobile-drawer.open .drawer-panel {
            transform: translateX(0);
        }

        .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
        }

        .drawer-close {
            font-size: 1.6rem;
            color: var(--text-main);
            background: none;
            border: none;
        }

        .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .drawer-nav a {
            font-size: 1.1rem;
            font-weight: 500;
            color: var(--text-main);
            padding: 8px 0;
            border-bottom: 1px solid var(--line);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero h1 {
                font-size: 2.2rem;
            }

            .trust-strip .container {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

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

            .matrix-card.large {
                grid-row: auto;
                min-height: 280px;
            }

            .source-network,
            .matching-demo,
            .quality-grid,
            .faq-layout,
            .cta-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

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

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

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

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

        @media (max-width: 768px) {
            .main-nav,
            .nav-cta {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .mobile-drawer {
                display: block;
            }

            .section {
                padding: 56px 0;
            }

            .hero {
                padding: 56px 0;
            }

            .hero h1 {
                font-size: 1.8rem;
            }

            .hero-sub {
                font-size: 1rem;
            }

            .trust-strip .container {
                grid-template-columns: 1fr;
                gap: 12px;
            }

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

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

            .process-steps {
                grid-template-columns: 1fr;
            }

            .dashboard-metrics {
                grid-template-columns: 1fr;
            }

            .cta-form {
                grid-template-columns: 1fr;
            }

            .form-group.full-width,
            .form-submit {
                grid-column: auto;
            }

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

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .hero-actions {
                flex-direction: column;
            }

            .btn {
                width: 100%;
            }

            .matrix-card {
                padding: 24px;
            }

            .matrix-card.large h3 {
                font-size: 1.5rem;
            }

            .tile-img {
                height: 140px;
            }
        }

/* roulang page: category1 */
:root {
        --brand-900: #0D3B2E;
        --brand-700: #0F4C3A;
        --brand-500: #1F6B4F;
        --brand-100: #E5F0EA;
        --accent-600: #D9A441;
        --accent-100: #FAF0DC;
        --bg-page: #F5F3EE;
        --bg-card: #FFFFFF;
        --text-main: #1F2622;
        --text-sub: #4A5550;
        --line: #DCE3DE;
        --danger: #B94A3D;
        --success: #2E7D5B;
        --shadow-sm: 0 2px 8px rgba(13,59,46,0.04);
        --shadow-md: 0 8px 24px rgba(13,59,46,0.06);
        --shadow-lg: 0 16px 40px rgba(13,59,46,0.10);
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-pill: 999px;
        --container: 1200px;
        --header-height: 72px;
    }

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

    body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        background-color: var(--bg-page);
        color: var(--text-main);
        line-height: 1.6;
        font-size: 16px;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        margin: 0;
        padding: 0;
    }

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

    a {
        color: inherit;
        text-decoration: none;
        transition: color 150ms ease, background-color 150ms ease, border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
    }

    button, input, select, textarea {
        font-family: inherit;
        font-size: 100%;
        line-height: 1.5;
        color: var(--text-main);
    }

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

    * {
        box-sizing: border-box;
    }

    .container {
        width: 100%;
        max-width: var(--container);
        margin: 0 auto;
        padding: 0 24px;
    }

    .section {
        padding: 88px 0;
    }

    .section-alt {
        background-color: #FFFFFF;
    }

    .section-muted {
        background-color: #F0EDE6;
    }

    .section-head {
        max-width: 720px;
        margin-bottom: 48px;
    }

    .section-head h2 {
        font-size: 2rem;
        font-weight: 700;
        line-height: 1.3;
        color: var(--brand-900);
        letter-spacing: 0.01em;
        margin-bottom: 16px;
        margin-top: 0;
    }

    .section-head p {
        font-size: 1.06rem;
        color: var(--text-sub);
        line-height: 1.8;
        margin: 0;
    }

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

    .text-brand {
        color: var(--brand-700);
    }

    .text-accent {
        color: var(--accent-600);
    }

    .badge {
        display: inline-flex;
        align-items: center;
        padding: 6px 14px;
        border-radius: var(--radius-pill);
        background: var(--brand-100);
        color: var(--brand-700);
        font-size: 0.8rem;
        font-weight: 600;
        letter-spacing: 0.02em;
        white-space: nowrap;
    }

    .badge-accent {
        background: var(--accent-100);
        color: #8a6a1f;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 0 24px;
        height: 44px;
        border-radius: var(--radius-pill);
        font-size: 0.95rem;
        font-weight: 600;
        transition: background-color 150ms ease, border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
        white-space: nowrap;
        border: 1px solid transparent;
    }

    .btn:focus-visible {
        outline: 3px solid var(--brand-500);
        outline-offset: 2px;
    }

    .btn-primary {
        background-color: var(--brand-700);
        color: #FFFFFF;
        border-color: var(--brand-700);
    }

    .btn-primary:hover {
        background-color: var(--brand-900);
        border-color: var(--brand-900);
        box-shadow: var(--shadow-md);
        transform: translateY(-1px);
        color: #FFFFFF;
    }

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

    .btn-secondary {
        background-color: transparent;
        color: var(--brand-700);
        border-color: var(--brand-700);
    }

    .btn-secondary:hover {
        background-color: var(--brand-100);
        border-color: var(--brand-500);
    }

    .btn-light {
        background-color: #FFFFFF;
        color: var(--brand-900);
        border-color: var(--line);
    }

    .btn-light:hover {
        background-color: var(--brand-100);
        border-color: var(--brand-500);
    }

    /* Header & Navigation */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1000;
        background-color: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(8px);
        -webkit-backdrop-filter: blur(8px);
        border-bottom: 1px solid var(--line);
        height: var(--header-height);
    }

    .site-header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
    }

    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-weight: 700;
        font-size: 1.25rem;
        color: var(--brand-900);
        letter-spacing: 0.01em;
    }

    .logo-mark {
        width: 36px;
        height: 36px;
        border-radius: 10px;
        background: var(--brand-700);
        display: inline-flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-weight: 700;
        font-size: 1.1rem;
        flex-shrink: 0;
    }

    .main-nav {
        display: flex;
        align-items: center;
        gap: 28px;
    }

    .main-nav a {
        font-size: 0.92rem;
        font-weight: 500;
        color: var(--text-sub);
        position: relative;
        padding: 8px 0;
    }

    .main-nav a:hover {
        color: var(--brand-700);
    }

    .main-nav a.active {
        color: var(--brand-900);
        font-weight: 600;
    }

    .main-nav a.active::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 3px;
        background-color: var(--brand-700);
        border-radius: 2px;
    }

    .nav-cta {
        display: flex;
        align-items: center;
    }

    .nav-toggle {
        display: none;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
        width: 36px;
        height: 36px;
        padding: 6px;
        background: transparent;
        border: 0;
    }

    .nav-toggle span {
        display: block;
        width: 24px;
        height: 2px;
        background-color: var(--brand-900);
        border-radius: 2px;
        transition: transform 200ms ease, opacity 200ms ease;
    }

    /* Footer */
    .site-footer {
        background-color: var(--brand-900);
        color: #B8C5BF;
        padding: 64px 0 24px;
    }

    .site-footer a {
        color: #B8C5BF;
        text-decoration: none;
        transition: color 150ms ease;
    }

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

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

    .footer-brand .logo {
        color: #FFFFFF;
        margin-bottom: 16px;
    }

    .footer-brand .logo .logo-mark {
        background-color: var(--brand-500);
    }

    .footer-brand p {
        font-size: 0.95rem;
        line-height: 1.8;
        margin: 0;
        color: #B8C5BF;
    }

    .footer-col h4 {
        color: #FFFFFF;
        font-size: 1rem;
        font-weight: 600;
        margin: 0 0 16px;
    }

    .footer-col a {
        display: block;
        font-size: 0.92rem;
        margin-bottom: 12px;
    }

    .footer-bottom {
        border-top: 1px solid rgba(255,255,255,0.15);
        padding-top: 20px;
        text-align: center;
        font-size: 0.85rem;
        color: #B8C5BF;
    }

    /* Category Page Specific */
    .category-hero {
        padding: 64px 0 56px;
        background: linear-gradient(135deg, #E5F0EA 0%, #F5F3EE 100%);
    }

    .breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 0.88rem;
        color: var(--text-sub);
        margin-bottom: 20px;
    }

    .breadcrumb a {
        color: var(--brand-700);
        font-weight: 500;
    }

    .breadcrumb a:hover {
        text-decoration: underline;
    }

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

    .category-hero h1 {
        font-size: 2.75rem;
        font-weight: 700;
        line-height: 1.3;
        color: var(--brand-900);
        letter-spacing: 0.01em;
        margin: 0 0 16px;
    }

    .category-lead {
        font-size: 1.15rem;
        color: var(--text-sub);
        line-height: 1.9;
        max-width: 720px;
        margin: 0;
    }

    /* Filter Bar */
    .filter-bar {
        padding: 32px 0;
        background-color: #FFFFFF;
        border-bottom: 1px solid var(--line);
    }

    .filter-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
        align-items: end;
    }

    .filter-item {
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    .filter-item label {
        font-size: 0.85rem;
        font-weight: 600;
        color: var(--brand-700);
        letter-spacing: 0.02em;
    }

    .filter-item select {
        height: 46px;
        background-color: #FFFFFF;
        border: 1px solid var(--line);
        border-radius: var(--radius-sm);
        padding: 0 16px;
        font-size: 0.92rem;
        color: var(--text-main);
        outline: none;
        transition: border-color 150ms ease, box-shadow 150ms ease;
    }

    .filter-item select:focus {
        border-color: var(--brand-700);
        box-shadow: 0 0 0 4px rgba(31,107,79,0.08);
    }

    .filter-note {
        margin-top: 16px;
        font-size: 0.85rem;
        color: var(--text-sub);
    }

    /* Resource Cards */
    .resource-section {
        padding-top: 72px;
        padding-bottom: 72px;
    }

    .resource-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }

    .resource-card {
        background-color: var(--bg-card);
        border: 1px solid var(--line);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        overflow: hidden;
        transition: border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
    }

    .resource-card:hover {
        border-color: var(--brand-700);
        box-shadow: var(--shadow-md);
        transform: translateY(-2px);
    }

    .resource-img {
        position: relative;
        aspect-ratio: 4 / 3;
        background-color: #E3E9E5;
        overflow: hidden;
    }

    .resource-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        border-radius: 0;
    }

    .resource-img .badge {
        position: absolute;
        top: 16px;
        left: 16px;
        z-index: 2;
        background-color: rgba(255,255,255,0.92);
        backdrop-filter: blur(4px);
        border: 1px solid var(--line);
    }

    .resource-body {
        padding: 20px;
    }

    .resource-body h3 {
        font-size: 1.15rem;
        font-weight: 700;
        color: var(--brand-900);
        margin: 0 0 10px;
        line-height: 1.45;
    }

    .resource-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 0.85rem;
        color: var(--text-sub);
        margin: 0 0 14px;
    }

    .resource-meta span::before {
        content: "·";
        margin-right: 4px;
        color: var(--accent-600);
    }

    .resource-meta span:first-child::before {
        display: none;
    }

    .resource-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }

    .resource-tags span {
        display: inline-block;
        padding: 4px 12px;
        background: var(--brand-100);
        color: var(--brand-700);
        border-radius: var(--radius-pill);
        font-size: 0.75rem;
        font-weight: 500;
    }

    .resource-more {
        display: flex;
        justify-content: center;
        margin-top: 36px;
    }

    /* Process */
    .process-section {
        padding-top: 72px;
        padding-bottom: 72px;
    }

    .process-steps {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }

    .process-step {
        background: var(--bg-card);
        border: 1px solid var(--line);
        border-radius: var(--radius-md);
        padding: 28px 24px;
        box-shadow: var(--shadow-sm);
        transition: border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
    }

    .process-step:hover {
        border-color: var(--brand-700);
        box-shadow: var(--shadow-md);
        transform: translateY(-2px);
    }

    .step-num {
        display: inline-block;
        font-size: 1.6rem;
        font-weight: 700;
        color: var(--accent-600);
        margin-bottom: 12px;
        line-height: 1;
    }

    .process-step h3 {
        font-size: 1.15rem;
        font-weight: 700;
        color: var(--brand-900);
        margin: 0 0 10px;
    }

    .process-step p {
        font-size: 0.92rem;
        color: var(--text-sub);
        line-height: 1.7;
        margin: 0;
    }

    /* Quality */
    .quality-section {
        padding-top: 72px;
        padding-bottom: 72px;
    }

    .quality-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 48px;
        align-items: center;
    }

    .quality-list h2 {
        font-size: 2rem;
        font-weight: 700;
        line-height: 1.3;
        color: var(--brand-900);
        margin: 0 0 20px;
    }

    .quality-list ul {
        list-style: none;
        margin: 0;
        padding: 0;
        display: flex;
        flex-direction: column;
        gap: 18px;
    }

    .quality-list li {
        display: flex;
        align-items: flex-start;
        gap: 14px;
        font-size: 0.98rem;
        color: var(--text-sub);
        line-height: 1.7;
    }

    .quality-list li::before {
        content: "";
        flex-shrink: 0;
        width: 22px;
        height: 22px;
        background: var(--brand-100);
        border-radius: 50%;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        color: var(--brand-700);
        font-weight: 700;
        font-size: 0.8rem;
        margin-top: 2px;
    }

    .quality-image {
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-md);
        background-color: #E3E9E5;
    }

    .quality-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        aspect-ratio: 4 / 3;
    }

    /* Metrics */
    .data-section {
        padding-top: 72px;
        padding-bottom: 72px;
    }

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

    .metric-card {
        background: var(--bg-card);
        border: 1px solid var(--line);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        padding: 28px 24px;
        text-align: center;
        transition: border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
    }

    .metric-card:hover {
        border-color: var(--accent-600);
        box-shadow: var(--shadow-md);
        transform: translateY(-2px);
    }

    .metric-value {
        display: block;
        font-size: 2.2rem;
        font-weight: 700;
        color: var(--accent-600);
        line-height: 1.2;
        margin-bottom: 8px;
    }

    .metric-label {
        font-size: 0.95rem;
        color: var(--text-sub);
        font-weight: 500;
    }

    /* CTA */
    .cta-section {
        padding-top: 72px;
        padding-bottom: 72px;
        background: linear-gradient(135deg, #0F4C3A 0%, #0D3B2E 100%);
        color: #FFFFFF;
    }

    .cta-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 48px;
        align-items: center;
    }

    .cta-copy h2 {
        font-size: 2rem;
        font-weight: 700;
        line-height: 1.3;
        margin: 0 0 16px;
        color: #FFFFFF;
    }

    .cta-copy p {
        font-size: 1.05rem;
        color: #C8D8D1;
        line-height: 1.8;
        margin: 0;
    }

    .cta-form {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
        background: rgba(255,255,255,0.06);
        padding: 28px;
        border-radius: var(--radius-md);
        border: 1px solid rgba(255,255,255,0.12);
    }

    .cta-form input,
    .cta-form select {
        width: 100%;
        height: 46px;
        background-color: #FFFFFF;
        border: 1px solid var(--line);
        border-radius: var(--radius-sm);
        padding: 0 16px;
        font-size: 0.92rem;
        color: var(--text-main);
        outline: none;
        transition: border-color 150ms ease, box-shadow 150ms ease;
    }

    .cta-form input:focus,
    .cta-form select:focus {
        border-color: var(--accent-600);
        box-shadow: 0 0 0 4px rgba(217,164,65,0.15);
    }

    .cta-form .btn {
        grid-column: span 2;
        width: 100%;
    }

    /* Responsive */
    @media (max-width: 1024px) {
        .resource-grid,
        .metrics-grid {
            grid-template-columns: repeat(2, 1fr);
        }
        .process-steps {
            grid-template-columns: repeat(2, 1fr);
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
    }

    @media (max-width: 768px) {
        .main-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            width: 100%;
            background: #FFFFFF;
            flex-direction: column;
            gap: 16px;
            padding: 24px;
            border-bottom: 1px solid var(--line);
            box-shadow: var(--shadow-md);
            z-index: 999;
        }

        .main-nav.open {
            display: flex;
        }

        .main-nav a {
            font-size: 1rem;
            padding: 8px 0;
        }

        .nav-toggle {
            display: flex;
        }

        .nav-cta {
            display: none;
        }

        .section,
        .category-hero,
        .resource-section,
        .process-section,
        .quality-section,
        .data-section,
        .cta-section {
            padding: 32px 0;
        }

        .category-hero h1 {
            font-size: 2rem;
        }

        .filter-grid,
        .resource-grid,
        .metrics-grid,
        .process-steps,
        .cta-grid,
        .quality-grid {
            grid-template-columns: 1fr;
        }

        .quality-grid {
            gap: 24px;
        }

        .cta-form {
            grid-template-columns: 1fr;
            padding: 20px;
        }

        .cta-form .btn {
            grid-column: span 1;
        }

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

        .resource-more {
            margin-top: 24px;
        }
    }

    @media (max-width: 520px) {
        .container {
            padding: 0 16px;
        }
        .section-head h2,
        .quality-list h2,
        .cta-copy h2 {
            font-size: 1.5rem;
        }
        .category-hero h1 {
            font-size: 1.75rem;
        }
        .metric-value {
            font-size: 1.8rem;
        }
        .filter-item select {
            width: 100%;
        }
    }

/* roulang page: article */
:root {
            --brand-900: #0D3B2E;
            --brand-700: #0F4C3A;
            --brand-500: #1F6B4F;
            --brand-100: #E5F0EA;
            --accent-600: #D9A441;
            --accent-100: #FAF0DC;
            --bg-page: #F5F3EE;
            --bg-card: #FFFFFF;
            --text-main: #1F2622;
            --text-sub: #4A5550;
            --line: #DCE3DE;
            --danger: #B94A3D;
            --success: #2E7D5B;
            --shadow-sm: 0 2px 8px rgba(13,59,46,0.04);
            --shadow-md: 0 8px 24px rgba(13,59,46,0.06);
            --shadow-lg: 0 16px 40px rgba(13,59,46,0.10);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-pill: 999px;
            --container: 1200px;
            --header-height: 72px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            background-color: var(--bg-page);
            color: var(--text-main);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            display: block;
            height: auto;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 150ms ease, background-color 150ms ease, border-color 150ms ease;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: 100%;
            line-height: 1.5;
            color: var(--text-main);
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 88px 0;
        }
        .section-alt {
            background-color: #FFFFFF;
        }
        .section-muted {
            background-color: #F0EDE6;
        }
        .section-head {
            max-width: 720px;
            margin-bottom: 48px;
        }
        .section-head h2 {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--brand-900);
            letter-spacing: 0.01em;
            margin-bottom: 16px;
        }
        .section-head p {
            font-size: 1.06rem;
            color: var(--text-sub);
            line-height: 1.8;
        }
        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .text-brand {
            color: var(--brand-700);
        }
        .text-accent {
            color: var(--accent-600);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            background: var(--brand-100);
            color: var(--brand-700);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }
        .badge-accent {
            background: var(--accent-100);
            color: #8a6a1f;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 0 24px;
            height: 44px;
            border-radius: var(--radius-pill);
            font-size: 0.95rem;
            font-weight: 600;
            transition: background-color 150ms ease, border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
            white-space: nowrap;
        }
        .btn:focus-visible {
            outline: 3px solid var(--brand-500);
            outline-offset: 2px;
        }
        .btn-primary {
            background-color: var(--brand-700);
            color: #FFFFFF;
            border: 1px solid var(--brand-700);
        }
        .btn-primary:hover {
            background-color: var(--brand-900);
            border-color: var(--brand-900);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .btn-secondary {
            background-color: transparent;
            color: var(--brand-700);
            border: 1px solid var(--brand-700);
        }
        .btn-secondary:hover {
            background-color: var(--brand-100);
            border-color: var(--brand-500);
        }
        .btn-light {
            background-color: #FFFFFF;
            color: var(--brand-900);
            border: 1px solid var(--line);
        }
        .btn-light:hover {
            background-color: var(--brand-100);
            border-color: var(--brand-500);
        }
        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--line);
            height: var(--header-height);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--brand-900);
            letter-spacing: 0.01em;
        }
        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--brand-700);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .main-nav a {
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-main);
            position: relative;
            padding: 6px 0;
            white-space: nowrap;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 0;
            height: 3px;
            border-radius: var(--radius-pill);
            background: var(--brand-500);
            transition: width 150ms ease;
        }
        .main-nav a:hover {
            color: var(--brand-700);
        }
        .main-nav a:hover::after {
            width: 100%;
        }
        .main-nav a.active {
            color: var(--brand-700);
            font-weight: 600;
        }
        .main-nav a.active::after {
            width: 100%;
        }
        .nav-cta {
            display: flex;
            align-items: center;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            background: var(--brand-100);
            transition: background-color 150ms ease;
        }
        .nav-toggle:hover {
            background: var(--brand-100);
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--brand-700);
            border-radius: 2px;
            transition: transform 150ms ease, opacity 150ms ease;
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        /* Breadcrumb */
        .breadcrumb-area {
            padding: 24px 0 0;
            background: var(--bg-page);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-sub);
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            color: #9AA39F;
            font-size: 0.8rem;
        }
        .breadcrumb a {
            color: var(--text-sub);
            transition: color 150ms ease;
        }
        .breadcrumb a:hover {
            color: var(--brand-700);
        }
        .breadcrumb .current {
            color: var(--brand-700);
            font-weight: 500;
        }
        /* Article Hero */
        .article-hero {
            padding: 40px 0 0;
            background: var(--bg-page);
        }
        .article-hero-inner {
            max-width: 820px;
        }
        .article-meta-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 20px;
            margin: 20px 0 12px;
        }
        .article-meta-row .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.88rem;
            color: var(--text-sub);
        }
        .article-meta-row .meta-item svg {
            width: 16px;
            height: 16px;
            fill: var(--brand-500);
        }
        .article-title {
            font-size: 2.35rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--brand-900);
            letter-spacing: 0.01em;
            margin-bottom: 24px;
        }
        .article-cover {
            width: 100%;
            max-width: 820px;
            margin: 32px 0 0;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .article-cover img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
            aspect-ratio: 16/9;
        }
        /* Article Content */
        .article-content-section {
            padding: 48px 0 72px;
            background: var(--bg-card);
        }
        .article-content-wrapper {
            max-width: 820px;
        }
        .article-content {
            font-size: 1.06rem;
            line-height: 1.85;
            color: var(--text-main);
        }
        .article-content h2 {
            font-size: 1.65rem;
            font-weight: 700;
            line-height: 1.4;
            color: var(--brand-900);
            margin: 48px 0 20px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--brand-100);
        }
        .article-content h3 {
            font-size: 1.3rem;
            font-weight: 600;
            line-height: 1.45;
            color: var(--brand-700);
            margin: 36px 0 16px;
        }
        .article-content p {
            margin-bottom: 20px;
        }
        .article-content ul,
        .article-content ol {
            margin: 0 0 24px;
            padding-left: 28px;
        }
        .article-content ul li,
        .article-content ol li {
            margin-bottom: 10px;
            position: relative;
        }
        .article-content ul li::marker {
            color: var(--brand-500);
        }
        .article-content blockquote {
            border-left: 4px solid var(--brand-500);
            background: var(--brand-100);
            padding: 20px 28px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 28px 0;
            color: var(--text-sub);
            font-style: italic;
        }
        .article-content img {
            border-radius: var(--radius-md);
            margin: 28px 0;
            box-shadow: var(--shadow-sm);
            width: 100%;
            height: auto;
        }
        .article-content a {
            color: var(--brand-700);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content a:hover {
            color: var(--brand-900);
        }
        /* Article Notice */
        .article-notice {
            padding: 32px 0 0;
            background: var(--bg-card);
        }
        .notice-card {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--brand-100);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            max-width: 820px;
        }
        .notice-card .notice-icon {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
            margin-top: 2px;
            fill: var(--brand-700);
        }
        .notice-card p {
            margin: 0;
            font-size: 0.92rem;
            color: var(--text-sub);
            line-height: 1.7;
        }
        /* Related Posts */
        .related-section {
            padding: 72px 0 88px;
            background: var(--bg-page);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
            margin-top: 40px;
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 150ms ease, transform 150ms ease, border-color 150ms ease;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--brand-500);
        }
        .related-card .card-thumb {
            aspect-ratio: 16/10;
            overflow: hidden;
            background: #EEF2EF;
            position: relative;
        }
        .related-card .card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 300ms ease;
        }
        .related-card:hover .card-thumb img {
            transform: scale(1.03);
        }
        .related-card .card-body {
            padding: 20px 22px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .related-card .card-tag {
            display: inline-flex;
            align-self: flex-start;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            background: var(--brand-100);
            color: var(--brand-700);
            margin-bottom: 12px;
        }
        .related-card h3 {
            font-size: 1.06rem;
            font-weight: 700;
            line-height: 1.5;
            color: var(--brand-900);
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-excerpt {
            font-size: 0.9rem;
            color: var(--text-sub);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
            flex: 1;
        }
        .related-card .card-date {
            font-size: 0.8rem;
            color: #9AA39F;
        }
        /* CTA */
        .article-cta {
            padding: 72px 0 88px;
            background: var(--bg-card);
        }
        .cta-card {
            background: linear-gradient(135deg, var(--brand-700) 0%, var(--brand-900) 100%);
            border-radius: var(--radius-md);
            padding: 48px 52px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            box-shadow: var(--shadow-lg);
        }
        .cta-card .cta-text h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .cta-card .cta-text p {
            font-size: 1rem;
            color: #B8C5BF;
            margin: 0;
            line-height: 1.7;
        }
        .cta-card .cta-actions {
            display: flex;
            gap: 16px;
            flex-shrink: 0;
        }
        .cta-card .btn-white {
            background: #FFFFFF;
            color: var(--brand-900);
            border: 1px solid #FFFFFF;
        }
        .cta-card .btn-white:hover {
            background: var(--brand-100);
            border-color: var(--brand-100);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
        }
        .cta-card .btn-outline-white {
            background: transparent;
            color: #FFFFFF;
            border: 1px solid rgba(255,255,255,0.5);
        }
        .cta-card .btn-outline-white:hover {
            background: rgba(255,255,255,0.1);
            border-color: #FFFFFF;
        }
        /* Footer */
        .site-footer {
            background-color: var(--brand-900);
            color: #B8C5BF;
            padding: 64px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 48px;
            margin-bottom: 48px;
        }
        .footer-brand .logo {
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .footer-brand .logo-mark {
            background: var(--brand-500);
        }
        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.8;
            color: #B8C5BF;
            max-width: 300px;
            margin: 0;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: #B8C5BF;
            margin-bottom: 12px;
            transition: color 150ms ease;
        }
        .footer-col a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 24px;
            font-size: 0.82rem;
            color: #7E8D85;
            text-align: center;
        }
        /* Mobile Nav Drawer */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: #FFFFFF;
            z-index: 999;
            padding: 32px 24px;
            overflow-y: auto;
        }
        .mobile-nav.open {
            display: block;
        }
        .mobile-nav a {
            display: block;
            padding: 16px 0;
            font-size: 1.1rem;
            font-weight: 500;
            color: var(--text-main);
            border-bottom: 1px solid var(--line);
            transition: color 150ms ease, padding-left 150ms ease;
        }
        .mobile-nav a:hover {
            color: var(--brand-700);
            padding-left: 8px;
        }
        .mobile-nav a.active {
            color: var(--brand-700);
            font-weight: 600;
        }
        .mobile-nav .btn {
            margin-top: 24px;
            width: 100%;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .article-title {
                font-size: 2rem;
            }
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .main-nav {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .mobile-nav {
                display: none;
            }
            .mobile-nav.open {
                display: block;
            }
            .article-title {
                font-size: 1.6rem;
            }
            .article-hero {
                padding: 28px 0 0;
            }
            .article-content-section {
                padding: 32px 0 56px;
            }
            .article-content {
                font-size: 1rem;
                line-height: 1.8;
            }
            .article-content h2 {
                font-size: 1.35rem;
                margin: 36px 0 16px;
            }
            .article-content h3 {
                font-size: 1.15rem;
                margin: 28px 0 12px;
            }
            .related-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .cta-card {
                flex-direction: column;
                text-align: center;
                padding: 36px 28px;
                gap: 24px;
            }
            .cta-card .cta-actions {
                flex-direction: column;
                width: 100%;
            }
            .cta-card .btn {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .breadcrumb-area {
                padding: 16px 0 0;
            }
            .article-meta-row {
                gap: 10px 16px;
                margin: 16px 0 8px;
            }
            .article-cover {
                margin: 24px 0 0;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .article-title {
                font-size: 1.4rem;
            }
            .article-meta-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .notice-card {
                padding: 16px 18px;
                flex-direction: column;
            }
            .related-section {
                padding: 48px 0 56px;
            }
            .article-cta {
                padding: 48px 0 56px;
            }
            .site-footer {
                padding: 48px 0 20px;
            }
        }

/* roulang page: category2 */
:root {
            --brand-900: #0D3B2E;
            --brand-700: #0F4C3A;
            --brand-500: #1F6B4F;
            --brand-100: #E5F0EA;
            --accent-600: #D9A441;
            --accent-100: #FAF0DC;
            --bg-page: #F5F3EE;
            --bg-card: #FFFFFF;
            --text-main: #1F2622;
            --text-sub: #4A5550;
            --line: #DCE3DE;
            --danger: #B94A3D;
            --success: #2E7D5B;
            --shadow-sm: 0 2px 8px rgba(13, 59, 46, 0.04);
            --shadow-md: 0 8px 24px rgba(13, 59, 46, 0.06);
            --shadow-lg: 0 16px 40px rgba(13, 59, 46, 0.10);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-pill: 999px;
            --container: 1200px;
            --header-height: 72px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            background-color: var(--bg-page);
            color: var(--text-main);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            display: block;
            height: auto;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 150ms ease, background-color 150ms ease, border-color 150ms ease;
        }
        button, input, select, textarea {
            font-family: inherit;
            font-size: 100%;
            line-height: 1.5;
            color: var(--text-main);
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 88px 0;
        }
        .section-alt {
            background-color: #FFFFFF;
        }
        .section-muted {
            background-color: #F0EDE6;
        }
        .section-head {
            max-width: 720px;
            margin-bottom: 48px;
        }
        .section-head h2 {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--brand-900);
            letter-spacing: 0.01em;
            margin-bottom: 16px;
        }
        .section-head p {
            font-size: 1.06rem;
            color: var(--text-sub);
            line-height: 1.8;
        }
        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .text-brand {
            color: var(--brand-700);
        }
        .text-accent {
            color: var(--accent-600);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            background: var(--brand-100);
            color: var(--brand-700);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }
        .badge-accent {
            background: var(--accent-100);
            color: #8a6a1f;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 0 24px;
            height: 44px;
            border-radius: var(--radius-pill);
            font-size: 0.95rem;
            font-weight: 600;
            transition: background-color 150ms ease, border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
            white-space: nowrap;
        }
        .btn:focus-visible {
            outline: 3px solid var(--brand-500);
            outline-offset: 2px;
        }
        .btn-primary {
            background-color: var(--brand-700);
            color: #FFFFFF;
            border: 1px solid var(--brand-700);
        }
        .btn-primary:hover {
            background-color: var(--brand-900);
            border-color: var(--brand-900);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .btn-secondary {
            background-color: transparent;
            color: var(--brand-700);
            border: 1px solid var(--brand-700);
        }
        .btn-secondary:hover {
            background-color: var(--brand-100);
            border-color: var(--brand-500);
        }
        .btn-light {
            background-color: #FFFFFF;
            color: var(--brand-900);
            border: 1px solid var(--line);
        }
        .btn-light:hover {
            background-color: var(--brand-100);
            border-color: var(--brand-500);
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--line);
            height: var(--header-height);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--brand-900);
            letter-spacing: 0.01em;
        }
        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--brand-700);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .main-nav a {
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-sub);
            position: relative;
            padding: 8px 0;
            transition: color 150ms ease;
        }
        .main-nav a:hover {
            color: var(--brand-700);
        }
        .main-nav a.active {
            color: var(--brand-900);
            font-weight: 600;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 3px;
            border-radius: 3px;
            background-color: var(--brand-700);
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            background: transparent;
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            border-radius: 2px;
            background-color: var(--brand-900);
            transition: transform 200ms ease, opacity 150ms ease;
        }
        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            bottom: 0;
            background-color: #FFFFFF;
            z-index: 999;
            padding: 24px;
            overflow-y: auto;
            flex-direction: column;
            gap: 16px;
        }
        .mobile-nav.open {
            display: flex;
        }
        .mobile-nav a {
            font-size: 1.1rem;
            font-weight: 500;
            color: var(--text-main);
            padding: 12px 16px;
            border-radius: 10px;
            transition: background-color 150ms ease;
        }
        .mobile-nav a:hover {
            background-color: var(--brand-100);
            color: var(--brand-700);
        }
        .mobile-nav a.active {
            background-color: var(--brand-100);
            color: var(--brand-700);
            font-weight: 600;
        }
        .breadcrumb-row {
            padding: 24px 0 0;
        }
        .breadcrumb-row .breadcrumb {
            margin-bottom: 0;
            --bs-breadcrumb-divider-color: #9AA8A2;
            --bs-breadcrumb-item-active-color: var(--brand-700);
        }
        .breadcrumb-row .breadcrumb a {
            color: var(--text-sub);
        }
        .breadcrumb-row .breadcrumb a:hover {
            color: var(--brand-700);
        }
        .category-hero {
            padding: 48px 0 64px;
            background: linear-gradient(135deg, #E8F0EA 0%, #F5F3EE 55%, #FAF0DC 100%);
            border-bottom: 1px solid var(--line);
        }
        .category-hero h1 {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--brand-900);
            line-height: 1.25;
            margin-bottom: 16px;
        }
        .category-hero .lead {
            font-size: 1.1rem;
            color: var(--text-sub);
            line-height: 1.8;
            max-width: 760px;
        }
        .model-visual {
            display: flex;
            align-items: stretch;
            gap: 16px;
            flex-wrap: wrap;
        }
        .model-node {
            flex: 1 1 200px;
            background: #FFFFFF;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            position: relative;
            transition: box-shadow 150ms ease, transform 150ms ease, border-color 150ms ease;
        }
        .model-node:hover {
            border-color: var(--brand-500);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .model-node .node-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--brand-100);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--brand-700);
        }
        .model-node h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--brand-900);
            margin-bottom: 8px;
        }
        .model-node p {
            font-size: 0.88rem;
            color: var(--text-sub);
            margin-bottom: 0;
            line-height: 1.6;
        }
        .model-connector {
            display: flex;
            align-items: center;
            justify-content: center;
            flex: 0 0 40px;
            color: var(--accent-600);
            font-size: 1.4rem;
            font-weight: 700;
        }
        .scene-card {
            background: #FFFFFF;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: box-shadow 150ms ease, transform 150ms ease, border-color 150ms ease;
        }
        .scene-card:hover {
            border-color: var(--brand-500);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .scene-card .scene-type {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            background: var(--brand-100);
            color: var(--brand-700);
            font-size: 0.78rem;
            font-weight: 600;
            align-self: flex-start;
            margin-bottom: 12px;
        }
        .scene-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--brand-900);
            margin-bottom: 10px;
        }
        .scene-card .demand-label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-600);
            margin-bottom: 4px;
        }
        .scene-card .demand-text {
            font-size: 0.9rem;
            color: var(--text-sub);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .scene-card .result-label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--success);
            margin-bottom: 4px;
        }
        .scene-card .result-text {
            font-size: 0.9rem;
            color: var(--text-sub);
            line-height: 1.6;
            margin-bottom: 0;
        }
        .algo-card {
            background: #FFFFFF;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 28px 22px;
            box-shadow: var(--shadow-sm);
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: box-shadow 150ms ease, transform 150ms ease, border-color 150ms ease;
        }
        .algo-card:hover {
            border-color: var(--brand-500);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .algo-card .algo-num {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--accent-600);
            line-height: 1;
            margin-bottom: 14px;
        }
        .algo-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--brand-900);
            margin-bottom: 10px;
        }
        .algo-card p {
            font-size: 0.88rem;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .algo-card.wide {
            flex: 2;
        }
        .algo-card.narrow {
            flex: 1;
        }
        .step-row {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .step-item {
            flex: 1 1 160px;
            background: #FFFFFF;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 24px 18px;
            text-align: center;
            position: relative;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 150ms ease, transform 150ms ease, border-color 150ms ease;
        }
        .step-item:hover {
            border-color: var(--brand-500);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .step-item .step-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--brand-700);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 700;
            margin: 0 auto 12px;
        }
        .step-item h4 {
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--brand-900);
            margin-bottom: 6px;
        }
        .step-item p {
            font-size: 0.83rem;
            color: var(--text-sub);
            margin-bottom: 0;
            line-height: 1.5;
        }
        .step-item .step-duration {
            display: inline-block;
            margin-top: 8px;
            padding: 2px 10px;
            border-radius: 999px;
            background: var(--accent-100);
            color: #8a6a1f;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .configurator-box {
            background: #FFFFFF;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-md);
        }
        .configurator-box .form-label {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--brand-900);
            margin-bottom: 6px;
        }
        .configurator-box .form-select,
        .configurator-box .form-range {
            border-radius: var(--radius-sm);
            border-color: var(--line);
        }
        .configurator-box .form-select:focus,
        .configurator-box .form-range:focus {
            border-color: var(--brand-700);
            box-shadow: 0 0 0 0.2rem rgba(31, 107, 79, 0.15);
        }
        .result-placeholder {
            background: #F7F5F0;
            border: 1px dashed var(--brand-500);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
        }
        .result-placeholder .result-icon {
            font-size: 2.5rem;
            color: var(--brand-500);
            margin-bottom: 10px;
        }
        .result-placeholder p {
            color: var(--text-sub);
            font-size: 0.9rem;
            margin-bottom: 0;
        }
        .metric-strip {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .metric-card {
            flex: 1 1 200px;
            background: #FFFFFF;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
        }
        .metric-card .metric-value {
            font-size: 2rem;
            font-weight: 700;
            color: var(--accent-600);
            line-height: 1.1;
            margin-bottom: 8px;
        }
        .metric-card .metric-label {
            font-size: 0.9rem;
            color: var(--text-sub);
        }
        .metric-card .metric-sub {
            font-size: 0.8rem;
            color: var(--success);
            font-weight: 600;
            margin-top: 6px;
        }
        .cta-panel {
            background: linear-gradient(135deg, var(--brand-700) 0%, var(--brand-900) 100%);
            border-radius: var(--radius-md);
            padding: 48px 40px;
            color: #FFFFFF;
            box-shadow: var(--shadow-lg);
        }
        .cta-panel h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 12px;
        }
        .cta-panel p {
            font-size: 1rem;
            color: #B8C5BF;
            line-height: 1.7;
            margin-bottom: 24px;
        }
        .cta-panel .btn-light {
            background-color: #FFFFFF;
            color: var(--brand-900);
            border: none;
        }
        .cta-panel .btn-light:hover {
            background-color: var(--accent-100);
        }
        .site-footer {
            background-color: var(--brand-900);
            color: #B8C5BF;
            padding: 56px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .logo {
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand .logo-mark {
            background: var(--accent-600);
            color: var(--brand-900);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.6;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: #B8C5BF;
            margin-bottom: 10px;
            transition: color 150ms ease;
        }
        .footer-col a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: #8CA79A;
        }
        @media (max-width: 1024px) {
            .section {
                padding: 64px 0;
            }
            .category-hero {
                padding: 36px 0 48px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .main-nav {
                gap: 16px;
            }
            .main-nav a {
                font-size: 0.85rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .category-hero {
                padding: 28px 0 40px;
            }
            .category-hero h1 {
                font-size: 1.7rem;
            }
            .main-nav {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .model-visual {
                flex-direction: column;
            }
            .model-connector {
                transform: rotate(90deg);
                align-self: center;
            }
            .step-row {
                flex-direction: column;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .configurator-box {
                padding: 22px 18px;
            }
            .cta-panel {
                padding: 32px 22px;
            }
            .cta-panel h2 {
                font-size: 1.4rem;
            }
            .algo-card.wide,
            .algo-card.narrow {
                flex: 1 1 100%;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .category-hero h1 {
                font-size: 1.4rem;
            }
            .section-head h2 {
                font-size: 1.5rem;
            }
            .metric-strip {
                flex-direction: column;
            }
            .metric-card {
                flex: 1 1 100%;
            }
        }

/* roulang page: category3 */
:root {
            --brand-900: #0D3B2E;
            --brand-700: #0F4C3A;
            --brand-500: #1F6B4F;
            --brand-100: #E5F0EA;
            --accent-600: #D9A441;
            --accent-100: #FAF0DC;
            --bg-page: #F5F3EE;
            --bg-card: #FFFFFF;
            --text-main: #1F2622;
            --text-sub: #4A5550;
            --line: #DCE3DE;
            --danger: #B94A3D;
            --success: #2E7D5B;
            --shadow-sm: 0 2px 8px rgba(13,59,46,0.04);
            --shadow-md: 0 8px 24px rgba(13,59,46,0.06);
            --shadow-lg: 0 16px 40px rgba(13,59,46,0.10);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-pill: 999px;
            --container: 1200px;
            --header-height: 72px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            background-color: var(--bg-page);
            color: var(--text-main);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 150ms ease, background-color 150ms ease, border-color 150ms ease;
        }

        button, input, select, textarea {
            font-family: inherit;
            font-size: 100%;
            line-height: 1.5;
            color: var(--text-main);
        }

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

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: 88px 0;
        }

        .section-alt {
            background-color: #FFFFFF;
        }

        .section-muted {
            background-color: #F0EDE6;
        }

        .section-head {
            max-width: 720px;
            margin-bottom: 48px;
        }

        .section-head h2 {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--brand-900);
            letter-spacing: 0.01em;
            margin-bottom: 16px;
        }

        .section-head p {
            font-size: 1.06rem;
            color: var(--text-sub);
            line-height: 1.8;
        }

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

        .text-brand {
            color: var(--brand-700);
        }

        .text-accent {
            color: var(--accent-600);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            background: var(--brand-100);
            color: var(--brand-700);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        .badge-accent {
            background: var(--accent-100);
            color: #8a6a1f;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 0 24px;
            height: 44px;
            border-radius: var(--radius-pill);
            font-size: 0.95rem;
            font-weight: 600;
            transition: background-color 150ms ease, border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
            white-space: nowrap;
        }

        .btn:focus-visible {
            outline: 3px solid var(--brand-500);
            outline-offset: 2px;
        }

        .btn-primary {
            background-color: var(--brand-700);
            color: #FFFFFF;
            border: 1px solid var(--brand-700);
        }

        .btn-primary:hover {
            background-color: var(--brand-900);
            border-color: var(--brand-900);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

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

        .btn-secondary {
            background-color: transparent;
            color: var(--brand-700);
            border: 1px solid var(--brand-700);
        }

        .btn-secondary:hover {
            background-color: var(--brand-100);
            border-color: var(--brand-500);
        }

        .btn-light {
            background-color: #FFFFFF;
            color: var(--brand-900);
            border: 1px solid var(--line);
        }

        .btn-light:hover {
            background-color: var(--brand-100);
            border-color: var(--brand-500);
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--line);
            height: var(--header-height);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--brand-900);
            letter-spacing: 0.01em;
        }

        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--brand-700);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }

        .main-nav a {
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-sub);
            padding: 8px 0;
            border-bottom: 3px solid transparent;
            transition: color 150ms ease, border-color 150ms ease;
        }

        .main-nav a:hover {
            color: var(--brand-700);
        }

        .main-nav a.active {
            color: var(--brand-700);
            border-bottom-color: var(--brand-500);
            font-weight: 600;
        }

        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-toggle {
            display: none;
            width: 36px;
            height: 36px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            background: transparent;
            border: 1px solid var(--line);
            border-radius: var(--radius-sm);
        }

        .nav-toggle span {
            width: 18px;
            height: 2px;
            background: var(--brand-900);
            border-radius: 2px;
            transition: transform 150ms ease, opacity 150ms ease;
        }

        /* H1 Hero Section */
        .cat-hero {
            background: linear-gradient(135deg, var(--brand-100) 0%, var(--bg-page) 55%, #F0EDE6 100%);
            border-bottom: 1px solid var(--line);
            padding: 64px 0 56px;
            position: relative;
            overflow: hidden;
        }

        .cat-hero::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 380px;
            height: 380px;
            background: radial-gradient(circle, rgba(31,107,79,0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .breadcrumb-simple {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-sub);
            margin-bottom: 20px;
        }

        .breadcrumb-simple a:hover {
            color: var(--brand-700);
        }

        .breadcrumb-simple .sep {
            color: var(--line);
        }

        .cat-hero h1 {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--brand-900);
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }

        .cat-hero .lead {
            font-size: 1.1rem;
            color: var(--text-sub);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* Anchor Nav */
        .anchor-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 28px;
        }

        .anchor-nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            background: #FFFFFF;
            border: 1px solid var(--line);
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-sub);
            transition: all 150ms ease;
        }

        .anchor-nav a:hover {
            border-color: var(--brand-500);
            background: var(--brand-100);
            color: var(--brand-700);
        }

        /* Industry Cards */
        .industry-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .industry-card {
            display: grid;
            grid-template-columns: 280px 1fr;
            background: var(--bg-card);
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: border-color 150ms ease, box-shadow 150ms ease, transform 150ms ease;
        }

        .industry-card:hover {
            border-color: var(--brand-500);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .industry-card .card-image {
            min-height: 220px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .industry-card .card-image .badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background: rgba(255,255,255,0.92);
            color: var(--brand-700);
        }

        .industry-card .card-body {
            padding: 28px 32px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .industry-card .card-title-row {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .industry-card .card-title-row h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--brand-900);
            margin: 0;
        }

        .industry-card .card-title-row .icon-circle {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--brand-100);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-700);
            font-weight: 700;
            flex-shrink: 0;
        }

        .industry-card .info-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 4px;
        }

        .industry-card .info-block {
            background: var(--bg-page);
            border-radius: var(--radius-sm);
            padding: 14px 16px;
        }

        .industry-card .info-block .label {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--text-sub);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 6px;
        }

        .industry-card .info-block p {
            font-size: 0.9rem;
            color: var(--text-main);
            line-height: 1.6;
            margin: 0;
        }

        /* Service Tags */
        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }

        .service-tags .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 22px;
            border-radius: var(--radius-pill);
            background: #FFFFFF;
            border: 1px solid var(--line);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-sub);
            transition: all 150ms ease;
        }

        .service-tags .tag:hover {
            border-color: var(--brand-500);
            background: var(--brand-100);
            color: var(--brand-700);
        }

        /* Steps */
        .steps-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-item {
            background: #FFFFFF;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            position: relative;
            box-shadow: var(--shadow-sm);
            transition: border-color 150ms ease, box-shadow 150ms ease;
        }

        .step-item:hover {
            border-color: var(--brand-500);
            box-shadow: var(--shadow-md);
        }

        .step-item .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--brand-700);
            color: #fff;
            font-weight: 700;
            font-size: 0.95rem;
            margin-bottom: 14px;
        }

        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--brand-900);
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--text-sub);
            line-height: 1.7;
            margin: 0;
        }

        /* Metrics */
        .metrics-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .metric-card {
            background: #FFFFFF;
            border: 1px solid var(--line);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            text-align: center;
        }

        .metric-card .metric-num {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--brand-700);
            line-height: 1.2;
            display: block;
            margin-bottom: 6px;
        }

        .metric-card .metric-num span {
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-sub);
            margin-left: 2px;
        }

        .metric-card .metric-label {
            font-size: 0.9rem;
            color: var(--text-sub);
            line-height: 1.5;
        }

        /* CTA Form Section */
        .cta-section {
            background: var(--brand-700);
            border-radius: var(--radius-md);
            padding: 48px 44px;
            position: relative;
            overflow: hidden;
            margin: 0 0 24px;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .cta-section h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
        }

        .cta-section p {
            color: rgba(255,255,255,0.85);
            line-height: 1.7;
            font-size: 0.98rem;
        }

        .cta-form {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-lg);
        }

        .cta-form .form-label {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--brand-900);
            margin-bottom: 6px;
        }

        .cta-form .form-control {
            height: 46px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--line);
            background: #FFFFFF;
            padding: 0 14px;
            font-size: 0.95rem;
            transition: border-color 150ms ease, box-shadow 150ms ease;
        }

        .cta-form .form-control:focus {
            border-color: var(--brand-700);
            box-shadow: 0 0 0 4px rgba(31,107,79,0.12);
            outline: none;
        }

        .cta-form select.form-control {
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%234A5550' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 14px center;
            padding-right: 36px;
        }

        .cta-form .btn {
            width: 100%;
            margin-top: 8px;
        }

        /* Footer */
        .site-footer {
            background: var(--brand-900);
            color: #B8C5BF;
            padding: 64px 0 28px;
            margin-top: 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 36px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            color: #FFFFFF;
            font-size: 1.2rem;
            margin-bottom: 16px;
        }

        .footer-brand .logo-mark {
            background: var(--brand-500);
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: #B8C5BF;
            margin-bottom: 0;
        }

        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: #B8C5BF;
            margin-bottom: 10px;
            transition: color 150ms ease;
        }

        .footer-col a:hover {
            color: #FFFFFF;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.12);
            padding-top: 20px;
            font-size: 0.8rem;
            color: #8AA398;
            text-align: center;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .main-nav {
                gap: 18px;
            }
            .industry-card {
                grid-template-columns: 220px 1fr;
            }
            .industry-card .info-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .info-grid .info-block:nth-child(3) {
                grid-column: span 2;
            }
            .steps-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-section {
                padding: 36px 30px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-head h2 {
                font-size: 1.55rem;
            }
            .cat-hero {
                padding: 44px 0 40px;
            }
            .cat-hero h1 {
                font-size: 1.85rem;
            }
            .main-nav {
                display: none;
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                width: 100%;
                background: #FFFFFF;
                flex-direction: column;
                align-items: flex-start;
                padding: 20px 24px;
                gap: 16px;
                border-bottom: 1px solid var(--line);
                box-shadow: var(--shadow-md);
                z-index: 999;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                font-size: 1rem;
                padding: 6px 0;
                width: 100%;
            }
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .industry-card {
                grid-template-columns: 1fr;
            }
            .industry-card .card-image {
                min-height: 180px;
            }
            .industry-card .card-body {
                padding: 20px;
            }
            .industry-card .info-grid {
                grid-template-columns: 1fr;
            }
            .info-grid .info-block:nth-child(3) {
                grid-column: auto;
            }
            .steps-row {
                grid-template-columns: 1fr;
            }
            .metrics-row {
                grid-template-columns: 1fr;
            }
            .cta-section {
                padding: 28px 20px;
                border-radius: var(--radius-sm);
            }
            .cta-section h2 {
                font-size: 1.35rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .cat-hero h1 {
                font-size: 1.55rem;
            }
            .anchor-nav {
                flex-wrap: nowrap;
                overflow-x: auto;
                padding-bottom: 6px;
                -webkit-overflow-scrolling: touch;
                scrollbar-width: none;
            }
            .anchor-nav::-webkit-scrollbar {
                display: none;
            }
            .anchor-nav a {
                white-space: nowrap;
                flex-shrink: 0;
                font-size: 0.8rem;
                padding: 7px 14px;
            }
            .industry-card .card-image {
                min-height: 150px;
            }
        }