/* roulang page: index */
:root {
            --color-primary: #2563EB;
            --color-primary-hover: #1D4ED8;
            --color-primary-light: #EFF6FF;
            --color-dark: #1E293B;
            --color-body: #334155;
            --color-muted: #62748E;
            --color-bg: #F5F8FC;
            --color-bg-card: #FFFFFF;
            --color-border: #E2E8F0;
            --color-border-light: #D9E2EF;
            --color-accent: #F59E0B;
            --color-accent-strong: #FF8C42;
            --color-success: #10B981;
            --color-danger: #EF4444;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 14px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(15, 39, 66, 0.04);
            --shadow-md: 0 8px 24px rgba(15, 39, 66, 0.06);
            --shadow-lg: 0 12px 32px rgba(15, 39, 66, 0.10);
            --shadow-xl: 0 20px 48px rgba(15, 39, 66, 0.14);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            --container-max: 1200px;
            --section-padding-y: 72px;
            --transition-fast: 160ms ease;
            --transition-base: 220ms ease;
            --transition-slow: 320ms ease;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-body);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

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

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

        :focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }

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

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

        .section-padding-sm {
            padding-top: 48px;
            padding-bottom: 48px;
        }

        .font-tabular {
            font-variant-numeric: tabular-nums;
        }

        .text-primary {
            color: var(--color-primary);
        }
        .text-dark {
            color: var(--color-dark);
        }
        .text-muted {
            color: var(--color-muted);
        }
        .text-accent {
            color: var(--color-accent);
        }

        .bg-primary {
            background-color: var(--color-primary);
        }
        .bg-dark {
            background-color: var(--color-dark);
        }
        .bg-accent {
            background-color: var(--color-accent);
        }
        .bg-card {
            background-color: var(--color-bg-card);
        }
        .bg-page {
            background-color: var(--color-bg);
        }

        .radius-sm {
            border-radius: var(--radius-sm);
        }
        .radius-md {
            border-radius: var(--radius-md);
        }
        .radius-lg {
            border-radius: var(--radius-lg);
        }
        .radius-xl {
            border-radius: var(--radius-xl);
        }
        .radius-full {
            border-radius: var(--radius-full);
        }

        .shadow-card {
            box-shadow: var(--shadow-md);
        }
        .shadow-card-hover {
            transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
        }
        .shadow-card-hover:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }

        .border-hairline {
            border: 1px solid var(--color-border);
        }
        .border-hairline-light {
            border: 1px solid var(--color-border-light);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 15px;
            line-height: 1.4;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-base);
            white-space: nowrap;
            user-select: none;
        }
        .btn:active {
            transform: scale(0.98);
        }
        .btn-primary {
            background-color: var(--color-primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.28);
        }
        .btn-primary:hover {
            background-color: var(--color-primary-hover);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.36);
        }
        .btn-accent {
            background-color: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.28);
        }
        .btn-accent:hover {
            background-color: #D97706;
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.36);
        }
        .btn-outline {
            background-color: transparent;
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
        }
        .btn-outline:hover {
            background-color: var(--color-primary-light);
            border-color: var(--color-primary-hover);
            color: var(--color-primary-hover);
        }
        .btn-ghost {
            background-color: transparent;
            color: var(--color-muted);
            padding: 8px 16px;
        }
        .btn-ghost:hover {
            color: var(--color-primary);
            background-color: var(--color-primary-light);
        }
        .btn-lg {
            padding: 16px 32px;
            font-size: 17px;
            border-radius: var(--radius-md);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
            border-radius: 6px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            line-height: 1.4;
            white-space: nowrap;
        }
        .tag-blue {
            background-color: #EFF6FF;
            color: var(--color-primary);
            border: 1px solid #BFDBFE;
        }
        .tag-green {
            background-color: #ECFDF5;
            color: #059669;
            border: 1px solid #A7F3D0;
        }
        .tag-orange {
            background-color: #FFFBEB;
            color: #D97706;
            border: 1px solid #FDE68A;
        }
        .tag-red {
            background-color: #FEF2F2;
            color: #DC2626;
            border: 1px solid #FECACA;
        }
        .tag-gray {
            background-color: #F8FAFC;
            color: #64748B;
            border: 1px solid #E2E8F0;
        }

        .card {
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
        }
        .card:hover {
            box-shadow: var(--shadow-lg);
            border-color: #BFDBFE;
        }
        .card-hover-lift:hover {
            transform: translateY(-2px);
        }

        .metric-number {
            font-variant-numeric: tabular-nums;
            font-weight: 800;
            color: var(--color-dark);
            letter-spacing: -0.02em;
            line-height: 1.15;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--color-primary);
            margin-bottom: 12px;
        }
        .section-label::before {
            content: "";
            display: inline-block;
            width: 24px;
            height: 2px;
            background-color: var(--color-primary);
            border-radius: 2px;
        }

        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-dark);
            line-height: 1.3;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--color-muted);
            line-height: 1.7;
            max-width: 640px;
        }

        .divider {
            height: 1px;
            background-color: var(--color-border);
            border: none;
            margin: 0;
        }

        .grid-gap {
            gap: 24px;
        }
        .grid-gap-sm {
            gap: 16px;
        }

        .icon-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            background-color: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 18px;
            flex-shrink: 0;
        }
        .icon-badge-sm {
            width: 32px;
            height: 32px;
            font-size: 14px;
            border-radius: 8px;
        }

        .faq-item {
            background-color: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: box-shadow var(--transition-base), border-color var(--transition-base);
        }
        .faq-item:hover {
            border-color: #BFDBFE;
            box-shadow: var(--shadow-sm);
        }
        .faq-item.open {
            border-color: #BFDBFE;
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-dark);
            text-align: left;
            background: none;
            border: none;
            cursor: pointer;
            min-height: 48px;
            transition: background-color var(--transition-fast);
        }
        .faq-question:hover {
            background-color: #F8FAFD;
        }
        .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-muted);
            transition: transform var(--transition-base), color var(--transition-fast);
        }
        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            color: var(--color-primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-slow);
            padding: 0 20px;
            color: var(--color-body);
            font-size: 15px;
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 20px 20px;
        }

        .form-input {
            width: 100%;
            padding: 14px 16px;
            font-size: 15px;
            color: var(--color-dark);
            background-color: #fff;
            border: 1.5px solid var(--color-border);
            border-radius: var(--radius-sm);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .form-input::placeholder {
            color: #94A3B8;
        }
        .form-input:focus {
            outline: none;
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
        }
        .form-label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-dark);
            margin-bottom: 6px;
        }

        .data-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            font-size: 14px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--color-border);
        }
        .data-table th {
            background-color: #F1F5F9;
            font-weight: 700;
            color: var(--color-dark);
            padding: 14px 16px;
            text-align: left;
            font-size: 13px;
            letter-spacing: 0.02em;
            border-bottom: 1px solid var(--color-border);
        }
        .data-table td {
            padding: 14px 16px;
            border-bottom: 1px solid var(--color-border);
            color: var(--color-body);
            font-variant-numeric: tabular-nums;
        }
        .data-table tbody tr:last-child td {
            border-bottom: none;
        }
        .data-table tbody tr:hover {
            background-color: #F8FAFD;
        }
        .data-table .highlight-row td {
            background-color: #EFF6FF;
        }

        .trend-up {
            color: var(--color-success);
            font-weight: 700;
        }
        .trend-down {
            color: var(--color-danger);
            font-weight: 700;
        }
        .trend-flat {
            color: var(--color-muted);
            font-weight: 600;
        }

        .step-dot {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background-color: var(--color-primary);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
        }
        .step-line {
            flex: 1;
            height: 2px;
            background-color: var(--color-border);
            min-width: 32px;
        }

        @media (max-width: 1024px) {
            :root {
                --section-padding-y: 56px;
            }
            .section-title {
                font-size: 22px;
            }
            .section-subtitle {
                font-size: 15px;
            }
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-padding-y: 44px;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section-title {
                font-size: 20px;
            }
            .btn {
                padding: 10px 20px;
                font-size: 14px;
            }
            .btn-lg {
                padding: 14px 24px;
                font-size: 15px;
            }
            .data-table {
                font-size: 12px;
            }
            .data-table th,
            .data-table td {
                padding: 10px 12px;
            }
            .grid-gap {
                gap: 16px;
            }
        }

        @media (max-width: 520px) {
            .section-title {
                font-size: 18px;
            }
            .btn-lg {
                width: 100%;
                justify-content: center;
            }
            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-answer {
                font-size: 14px;
            }
            .metric-number {
                font-size: 24px;
            }
        }

/* 导航补充样式 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background-color: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--color-border);
            transition: box-shadow var(--transition-base);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(15, 39, 66, 0.08);
        }
        .logo-text {
            font-weight: 800;
            font-size: 18px;
            color: var(--color-dark);
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-md);
            background-color: var(--color-primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 16px;
            flex-shrink: 0;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
        }
        .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-muted);
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background-color var(--transition-fast);
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--color-primary);
            background-color: var(--color-primary-light);
        }
        .nav-link.active {
            color: var(--color-primary);
            background-color: #EFF6FF;
            font-weight: 600;
        }
        .mobile-menu {
            display: none;
        }
        .mobile-menu.open {
            display: block;
        }

        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .mobile-menu {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background-color: #fff;
                border-bottom: 1px solid var(--color-border);
                padding: 16px 20px;
                box-shadow: 0 16px 32px rgba(15, 39, 66, 0.08);
                z-index: 49;
            }
            .mobile-menu .nav-link {
                display: block;
                padding: 12px 16px;
                font-size: 15px;
                border-radius: var(--radius-sm);
                margin-bottom: 4px;
            }
            .mobile-menu .btn {
                width: 100%;
                margin-top: 8px;
            }
        }
        @media (min-width: 769px) {
            .mobile-menu-btn {
                display: none;
            }
        }

        /* Hero 指标看板融合区 */
        .hero-stats-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        @media (min-width: 1024px) {
            .hero-stats-grid {
                grid-template-columns: repeat(4, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 640px) {
            .hero-stats-grid {
                gap: 12px;
            }
        }
        .stat-card {
            background-color: #fff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 18px 16px;
            text-align: center;
            transition: box-shadow var(--transition-base), transform var(--transition-base);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .stat-label {
            font-size: 12px;
            font-weight: 600;
            color: var(--color-muted);
            letter-spacing: 0.04em;
            margin-bottom: 6px;
            text-transform: uppercase;
        }
        .stat-value {
            font-size: 28px;
            font-weight: 800;
            color: var(--color-dark);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
            letter-spacing: -0.02em;
        }
        .stat-value.accent {
            color: var(--color-accent);
        }

        /* 服务矩阵不对称网格 */
        .service-asymmetric {
            display: grid;
            grid-template-columns: 1fr;
            gap: 20px;
        }
        @media (min-width: 768px) {
            .service-asymmetric {
                grid-template-columns: 2fr 1fr;
                grid-template-rows: auto auto;
            }
            .service-asymmetric .service-main {
                grid-row: 1 / span 2;
            }
            .service-asymmetric .service-side-top {
                grid-row: 1;
            }
            .service-asymmetric .service-side-bottom {
                grid-row: 2;
            }
        }

        /* 资讯区 */
        .news-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
        }
        @media (min-width: 768px) {
            .news-layout {
                grid-template-columns: 1.6fr 1fr;
            }
        }
        .news-link-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 14px 16px;
            border-radius: var(--radius-md);
            transition: background-color var(--transition-fast), color var(--transition-fast);
            border: 1px solid transparent;
        }
        .news-link-item:hover {
            background-color: #F8FAFD;
            border-color: var(--color-border);
        }
        .news-link-item .news-index {
            font-weight: 800;
            font-size: 14px;
            color: var(--color-primary);
            font-variant-numeric: tabular-nums;
            flex-shrink: 0;
            width: 28px;
            text-align: center;
        }
        .news-link-item .news-text {
            flex: 1;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-dark);
            line-height: 1.5;
        }
        .news-link-item .news-date {
            font-size: 12px;
            color: var(--color-muted);
            white-space: nowrap;
            flex-shrink: 0;
        }

        /* 场景演示步骤 */
        .scene-steps {
            display: flex;
            flex-wrap: wrap;
            align-items: flex-start;
            gap: 12px;
        }
        .scene-step {
            display: flex;
            align-items: center;
            gap: 10px;
            flex: 1;
            min-width: 180px;
        }
        .scene-step-text {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-dark);
            line-height: 1.4;
        }
        .scene-step-desc {
            font-size: 12px;
            color: var(--color-muted);
            line-height: 1.5;
        }

        /* 品牌介绍区 */
        .brand-intro-card {
            background: linear-gradient(135deg, #FFFFFF 0%, #F1F5F9 100%);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-md);
            overflow: hidden;
        }

/* roulang page: category1 */
/* 本页独有模块样式 */
        .category-hero {
            background-color: var(--color-bg, #F5F8FC);
            position: relative;
            overflow: hidden;
            padding: 56px 0 32px;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center right;
            opacity: 0.12;
            pointer-events: none;
        }
        .category-hero-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .category-hero-title {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--color-dark, #1E293B);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }
        .category-hero-desc {
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-body, #475569);
            max-width: 540px;
            margin-bottom: 24px;
        }
        .category-hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .category-hero-visual {
            position: relative;
            border-radius: var(--radius-lg, 14px);
            overflow: hidden;
            min-height: 260px;
            background-color: rgba(255,255,255,0.5);
            border: 1px solid var(--color-border-light, #E2E8F0);
            box-shadow: var(--shadow-md, 0 8px 24px rgba(15, 39, 66, 0.06));
        }
        .category-hero-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }
        .category-hero-visual::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30,41,59,0.18) 0%, rgba(30,41,59,0.02) 50%, rgba(30,41,59,0.05) 100%);
            pointer-events: none;
        }
        .category-metrics {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 32px;
            padding-top: 28px;
            border-top: 1px solid var(--color-border-light, #E2E8F0);
        }
        .metric-card {
            background: var(--color-bg-card, #FFFFFF);
            border-radius: var(--radius-md, 12px);
            padding: 18px 20px;
            border: 1px solid var(--color-border-light, #E2E8F0);
            box-shadow: var(--shadow-sm, 0 4px 12px rgba(15, 39, 66, 0.04));
            text-align: center;
        }
        .metric-label {
            font-size: 13px;
            color: var(--color-muted, #62748E);
            margin-bottom: 6px;
            font-weight: 500;
        }
        .metric-value {
            font-size: 30px;
            font-weight: 800;
            color: var(--color-primary, #2F6BFF);
            font-variant-numeric: tabular-nums;
            letter-spacing: -0.02em;
        }
        .metric-unit {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-muted, #62748E);
            margin-left: 2px;
        }

        /* 筛选工具栏 */
        .filter-toolbar {
            background: var(--color-bg-card, #FFFFFF);
            border: 1px solid var(--color-border-light, #E2E8F0);
            border-radius: var(--radius-lg, 14px);
            padding: 18px 22px;
            box-shadow: var(--shadow-sm, 0 4px 12px rgba(15, 39, 66, 0.04));
            margin-top: 40px;
            display: flex;
            flex-wrap: wrap;
            gap: 14px 28px;
            align-items: center;
            justify-content: flex-start;
        }
        .filter-group {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-muted, #62748E);
            white-space: nowrap;
        }
        .filter-chip {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            border-radius: var(--radius-full, 9999px);
            font-size: 13px;
            font-weight: 500;
            border: 1px solid var(--color-border-light, #E2E8F0);
            background: #FFFFFF;
            color: var(--color-body, #475569);
            cursor: pointer;
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .filter-chip:hover {
            border-color: var(--color-primary, #2F6BFF);
            color: var(--color-primary, #2F6BFF);
            background: var(--color-primary-light, #EFF4FF);
        }
        .filter-chip.is-active {
            background: var(--color-primary, #2F6BFF);
            color: #FFFFFF;
            border-color: var(--color-primary, #2F6BFF);
        }
        .filter-select {
            padding: 6px 12px;
            border-radius: var(--radius-sm, 8px);
            border: 1px solid var(--color-border-light, #E2E8F0);
            font-size: 13px;
            color: var(--color-body, #475569);
            background: #FFFFFF;
            cursor: pointer;
            transition: border-color 0.2s ease;
            outline: none;
            font-family: inherit;
        }
        .filter-select:focus {
            border-color: var(--color-primary, #2F6BFF);
            box-shadow: 0 0 0 2px rgba(47, 107, 255, 0.15);
        }

        /* 卡片网格 */
        .filters-card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 28px;
        }
        .filters-card {
            background: var(--color-bg-card, #FFFFFF);
            border-radius: var(--radius-lg, 14px);
            border: 1px solid var(--color-border-light, #E2E8F0);
            box-shadow: var(--shadow-sm, 0 4px 12px rgba(15, 39, 66, 0.04));
            overflow: hidden;
            transition: all 0.25s ease;
            display: flex;
            flex-direction: column;
        }
        .filters-card:hover {
            box-shadow: var(--shadow-lg, 0 12px 32px rgba(15, 39, 66, 0.10));
            transform: translateY(-2px);
            border-color: var(--color-primary-light, #D9E4FF);
        }
        .filters-card-image {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #F1F5F9;
        }
        .filters-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
        }
        .filters-card:hover .filters-card-image img {
            transform: scale(1.04);
        }
        .filters-card-rarity {
            position: absolute;
            top: 10px;
            left: 10px;
            padding: 4px 10px;
            border-radius: var(--radius-full, 9999px);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.02em;
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
        }
        .rarity-covert {
            background: rgba(245, 158, 11, 0.9);
            color: #FFFFFF;
        }
        .rarity-classified {
            background: rgba(168, 85, 247, 0.88);
            color: #FFFFFF;
        }
        .rarity-restricted {
            background: rgba(47, 107, 255, 0.88);
            color: #FFFFFF;
        }
        .rarity-milspec {
            background: rgba(98, 116, 142, 0.85);
            color: #FFFFFF;
        }
        .filters-card-body {
            padding: 16px 18px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .filters-card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-dark, #1E293B);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .filters-card-meta {
            display: flex;
            flex-direction: column;
            gap: 5px;
            margin-bottom: 14px;
        }
        .filters-card-meta-row {
            display: flex;
            justify-content: space-between;
            font-size: 13px;
            color: var(--color-muted, #62748E);
            line-height: 1.5;
        }
        .filters-card-meta-row strong {
            font-weight: 600;
            color: var(--color-body, #475569);
            font-variant-numeric: tabular-nums;
        }
        .filters-card-meta-row .highlight-value {
            color: var(--color-accent-strong, #F59E0B);
            font-weight: 700;
        }
        .filters-card-footer {
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid var(--color-border-light, #E2E8F0);
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 10px;
        }
        .filters-card-price {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-dark, #1E293B);
            font-variant-numeric: tabular-nums;
        }
        .filters-card-price small {
            font-weight: 400;
            font-size: 12px;
            color: var(--color-muted, #62748E);
        }
        .filters-card-btn {
            padding: 7px 16px;
            border-radius: var(--radius-sm, 8px);
            font-size: 13px;
            font-weight: 600;
            background: var(--color-primary, #2F6BFF);
            color: #FFFFFF;
            border: none;
            cursor: pointer;
            transition: all 0.2s ease;
            text-decoration: none;
            white-space: nowrap;
        }
        .filters-card-btn:hover {
            background: var(--color-accent-strong, #F59E0B);
            transform: translateY(-1px);
        }

        /* 数据对比表 */
        .comparison-section {
            margin-top: 56px;
        }
        .comparison-wrapper {
            overflow-x: auto;
            margin-top: 20px;
            border-radius: var(--radius-lg, 14px);
            border: 1px solid var(--color-border-light, #E2E8F0);
            background: var(--color-bg-card, #FFFFFF);
            box-shadow: var(--shadow-sm, 0 4px 12px rgba(15, 39, 66, 0.04));
        }
        .comparison-table {
            width: 100%;
            min-width: 720px;
            border-collapse: collapse;
            font-size: 14px;
            line-height: 1.6;
        }
        .comparison-table thead {
            background: #F8FAFD;
            border-bottom: 2px solid var(--color-border-light, #E2E8F0);
        }
        .comparison-table th {
            padding: 13px 16px;
            text-align: left;
            font-weight: 700;
            font-size: 13px;
            color: var(--color-dark, #1E293B);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .comparison-table td {
            padding: 13px 16px;
            color: var(--color-body, #475569);
            border-bottom: 1px solid #F1F5F9;
            font-variant-numeric: tabular-nums;
            white-space: nowrap;
        }
        .comparison-table tbody tr:last-child td {
            border-bottom: none;
        }
        .comparison-table tbody tr {
            transition: background 0.2s ease;
        }
        .comparison-table tbody tr:hover {
            background: #F8FAFD;
        }
        .comparison-table .cell-highlight {
            color: var(--color-accent-strong, #F59E0B);
            font-weight: 700;
        }
        .comparison-table .cell-primary {
            color: var(--color-primary, #2F6BFF);
            font-weight: 600;
        }
        .comparison-note {
            margin-top: 14px;
            font-size: 13px;
            color: var(--color-muted, #62748E);
            line-height: 1.7;
        }

        /* FAQ */
        .category-faq-section {
            margin-top: 56px;
        }
        .category-faq-list {
            margin-top: 20px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .category-faq-item {
            background: var(--color-bg-card, #FFFFFF);
            border: 1px solid var(--color-border-light, #E2E8F0);
            border-radius: var(--radius-md, 12px);
            box-shadow: var(--shadow-sm, 0 4px 12px rgba(15, 39, 66, 0.04));
            overflow: hidden;
            transition: border-color 0.2s ease;
        }
        .category-faq-item:hover {
            border-color: var(--color-primary-light, #D9E4FF);
        }
        .category-faq-item summary {
            padding: 16px 20px;
            font-weight: 700;
            font-size: 15px;
            color: var(--color-dark, #1E293B);
            cursor: pointer;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            line-height: 1.5;
            user-select: none;
        }
        .category-faq-item summary::-webkit-details-marker {
            display: none;
        }
        .category-faq-item summary::after {
            content: '+';
            font-size: 22px;
            font-weight: 400;
            color: var(--color-muted, #62748E);
            transition: transform 0.25s ease;
            flex-shrink: 0;
            line-height: 1;
        }
        .category-faq-item[open] summary::after {
            transform: rotate(45deg);
            color: var(--color-primary, #2F6BFF);
        }
        .category-faq-item[open] {
            background: #F8FAFD;
            border-color: var(--color-primary-light, #D9E4FF);
        }
        .category-faq-answer {
            padding: 0 20px 18px;
            font-size: 15px;
            line-height: 1.8;
            color: var(--color-body, #475569);
        }

        /* 底部CTA */
        .category-cta-section {
            margin-top: 56px;
        }
        .category-cta-bar {
            background: var(--color-primary, #2F6BFF);
            border-radius: var(--radius-lg, 14px);
            padding: 32px 36px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            box-shadow: var(--shadow-lg, 0 12px 32px rgba(15, 39, 66, 0.10));
            position: relative;
            overflow: hidden;
        }
        .category-cta-bar::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -5%;
            width: 280px;
            height: 280px;
            background: rgba(255,255,255,0.08);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-cta-bar::after {
            content: '';
            position: absolute;
            bottom: -50%;
            right: 18%;
            width: 200px;
            height: 200px;
            background: rgba(255,255,255,0.06);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-cta-text {
            position: relative;
            z-index: 1;
            flex: 1;
            min-width: 240px;
        }
        .category-cta-title {
            font-size: 22px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .category-cta-sub {
            font-size: 14px;
            color: rgba(255,255,255,0.85);
            line-height: 1.6;
        }
        .category-cta-btn {
            position: relative;
            z-index: 1;
            padding: 12px 26px;
            border-radius: var(--radius-sm, 8px);
            font-size: 15px;
            font-weight: 700;
            background: var(--color-accent-strong, #F59E0B);
            color: #FFFFFF;
            border: none;
            cursor: pointer;
            transition: all 0.25s ease;
            text-decoration: none;
            white-space: nowrap;
        }
        .category-cta-btn:hover {
            background: #E08B00;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(0,0,0,0.18);
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .category-hero-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .category-hero-visual {
                min-height: 220px;
                max-height: 340px;
            }
            .category-metrics {
                grid-template-columns: repeat(3, 1fr);
                gap: 12px;
            }
            .filters-card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .category-hero {
                padding: 40px 0 24px;
            }
            .category-hero-title {
                font-size: 27px;
            }
            .category-hero-desc {
                font-size: 15px;
            }
            .category-metrics {
                grid-template-columns: repeat(3, 1fr);
                gap: 8px;
                margin-top: 24px;
                padding-top: 20px;
            }
            .metric-value {
                font-size: 24px;
            }
            .metric-label {
                font-size: 12px;
            }
            .filter-toolbar {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                padding: 14px 16px;
            }
            .filter-group {
                width: 100%;
            }
            .filter-chip {
                font-size: 12px;
                padding: 5px 11px;
            }
            .filters-card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .category-cta-bar {
                flex-direction: column;
                text-align: center;
                padding: 24px 20px;
            }
            .category-cta-title {
                font-size: 19px;
            }
            .category-cta-btn {
                width: 100%;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .category-hero-title {
                font-size: 23px;
            }
            .category-hero-desc {
                font-size: 14px;
                line-height: 1.65;
            }
            .category-hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .category-hero-actions .btn {
                width: 100%;
                text-align: center;
            }
            .category-metrics {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .metric-card {
                padding: 14px 12px;
            }
            .metric-value {
                font-size: 21px;
            }
            .filters-card-title {
                font-size: 15px;
            }
            .filters-card-body {
                padding: 12px 14px 14px;
            }
            .category-faq-item summary {
                font-size: 14px;
                padding: 14px 16px;
            }
            .category-faq-answer {
                font-size: 14px;
                padding: 0 16px 14px;
            }
            .category-cta-title {
                font-size: 17px;
            }
        }

/* roulang page: category2 */
:root {
            --color-primary: #2563EB;
            --color-primary-hover: #1D4ED8;
            --color-primary-light: #DBEAFE;
            --color-dark: #1E293B;
            --color-body: #334155;
            --color-muted: #62748E;
            --color-bg: #F5F8FC;
            --color-bg-card: #FFFFFF;
            --color-border: #D9E2EF;
            --color-border-light: #E2E8F0;
            --color-accent: #F59E0B;
            --color-accent-strong: #FF8C42;
            --color-success: #10B981;
            --color-danger: #EF4444;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 14px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(15, 39, 66, 0.04);
            --shadow-md: 0 8px 24px rgba(15, 39, 66, 0.06);
            --shadow-lg: 0 12px 32px rgba(15, 39, 66, 0.10);
            --shadow-xl: 0 20px 48px rgba(15, 39, 66, 0.12);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            --transition: 200ms ease;
        }

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

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

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

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

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

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

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

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

        .bg-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            line-height: 1.5;
            cursor: pointer;
            border: 1px solid transparent;
            transition: all var(--transition);
            text-align: center;
            white-space: nowrap;
        }
        .btn:focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
        }
        .btn:active {
            transform: scale(0.98);
        }
        .btn-primary {
            background: var(--color-primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--color-primary-hover);
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
        }
        .btn-accent {
            background: var(--color-accent);
            color: #fff;
        }
        .btn-accent:hover {
            background: #D97706;
            color: #fff;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
        }
        .btn-outline {
            background: transparent;
            color: var(--color-primary);
            border-color: var(--color-primary);
        }
        .btn-outline:hover {
            background: var(--color-primary-light);
            color: var(--color-primary-hover);
        }
        .btn-ghost {
            background: transparent;
            color: var(--color-muted);
            border-color: transparent;
        }
        .btn-ghost:hover {
            background: var(--color-bg);
            color: var(--color-primary);
        }
        .btn-lg {
            padding: 16px 32px;
            font-size: 16px;
            border-radius: var(--radius-md);
        }

        /* 分类页专属 Hero */
        .cat-hero {
            position: relative;
            background: linear-gradient(135deg, #F5F8FC 0%, #EEF4FF 50%, #F8FAFD 100%);
            padding: 72px 0 88px;
            overflow: hidden;
            border-bottom: 1px solid var(--color-border-light);
        }
        .cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: radial-gradient(rgba(37, 99, 235, 0.06) 1px, transparent 1px);
            background-size: 24px 24px;
            pointer-events: none;
        }
        .cat-hero .hero-bg {
            position: absolute;
            top: 0;
            right: 0;
            width: 45%;
            height: 100%;
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            mask-image: linear-gradient(to left, rgba(0,0,0,0.8), transparent);
            -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,0.8), transparent);
            pointer-events: none;
        }
        .cat-hero-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .cat-hero-text h1 {
            font-size: 36px;
            font-weight: 800;
            color: var(--color-dark);
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .cat-hero-text .subtitle {
            font-size: 17px;
            color: var(--color-muted);
            line-height: 1.7;
            margin-bottom: 24px;
            max-width: 540px;
        }
        .cat-hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }
        .cat-hero-trust {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--color-muted);
            flex-wrap: wrap;
        }
        .cat-hero-trust span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .cat-hero-trust .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--color-success);
        }
        .hero-stats {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            align-self: end;
        }
        .hero-stat-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            padding: 20px 18px;
            text-align: center;
        }
        .hero-stat-card .stat-num {
            font-size: 28px;
            font-weight: 800;
            color: var(--color-primary);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
        }
        .hero-stat-card .stat-label {
            font-size: 13px;
            color: var(--color-muted);
            margin-top: 6px;
        }

        /* 筛选工具栏 */
        .filter-bar {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 16px 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            justify-content: space-between;
            margin-top: -32px;
            position: relative;
            z-index: 5;
        }
        .filter-group {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            align-items: center;
        }
        .filter-label {
            font-size: 13px;
            color: var(--color-muted);
            font-weight: 500;
            margin-right: 4px;
            white-space: nowrap;
        }
        .filter-chip {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            border-radius: var(--radius-full);
            font-size: 13px;
            font-weight: 500;
            color: var(--color-body);
            background: var(--color-bg);
            border: 1px solid var(--color-border-light);
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .filter-chip:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
        }
        .filter-chip.active {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
        }
        .filter-select {
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            background: var(--color-bg-card);
            font-size: 13px;
            color: var(--color-body);
            cursor: pointer;
            transition: border-color var(--transition);
        }
        .filter-select:focus {
            outline: none;
            border-color: var(--color-primary);
            box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
        }

        /* 卡片网格 */
        .card-grid-section {
            padding: 56px 0 72px;
        }
        .section-head {
            margin-bottom: 32px;
        }
        .section-head h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 8px;
        }
        .section-head p {
            color: var(--color-muted);
            font-size: 15px;
        }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .skin-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .skin-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        .skin-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--color-bg);
        }
        .skin-card-body {
            padding: 18px 20px 20px;
        }
        .skin-card-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 8px;
        }
        .skin-card-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--color-dark);
            line-height: 1.4;
        }
        .rarity-tag {
            display: inline-flex;
            align-items: center;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            font-size: 11px;
            font-weight: 600;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .rarity-covert {
            background: #FEF3C7;
            color: #92400E;
        }
        .rarity-classified {
            background: #EDE9FE;
            color: #5B21B6;
        }
        .rarity-restricted {
            background: #DBEAFE;
            color: #1E40AF;
        }
        .rarity-milspec {
            background: #D1FAE5;
            color: #065F46;
        }
        .skin-card-info {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 12px;
            font-size: 13px;
            color: var(--color-muted);
        }
        .skin-card-info span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .skin-card-value {
            display: flex;
            align-items: baseline;
            justify-content: space-between;
            padding-top: 12px;
            border-top: 1px solid var(--color-border-light);
            margin-bottom: 14px;
        }
        .skin-card-value .value-label {
            font-size: 13px;
            color: var(--color-muted);
        }
        .skin-card-value .value-num {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-accent-strong);
            font-variant-numeric: tabular-nums;
        }
        .skin-card .btn-detail {
            width: 100%;
            padding: 10px 0;
            text-align: center;
            background: var(--color-bg);
            color: var(--color-primary);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 14px;
            cursor: pointer;
            transition: all var(--transition);
        }
        .skin-card .btn-detail:hover {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
        }

        /* 对比表 */
        .compare-section {
            padding: 0 0 72px;
        }
        .compare-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            background: var(--color-bg-card);
        }
        .compare-table {
            width: 100%;
            min-width: 720px;
            border-collapse: collapse;
            font-size: 14px;
        }
        .compare-table th {
            background: var(--color-bg);
            color: var(--color-dark);
            font-weight: 600;
            text-align: left;
            padding: 14px 16px;
            border-bottom: 1px solid var(--color-border);
            white-space: nowrap;
        }
        .compare-table td {
            padding: 14px 16px;
            border-bottom: 1px solid var(--color-border-light);
            color: var(--color-body);
            white-space: nowrap;
        }
        .compare-table tr:last-child td {
            border-bottom: none;
        }
        .compare-table .highlight-row td {
            background: #FFFBEB;
        }
        .compare-table .highlight-cell {
            color: var(--color-accent-strong);
            font-weight: 700;
            font-variant-numeric: tabular-nums;
        }
        .compare-table .wear-bar {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .wear-bar .bar-track {
            width: 80px;
            height: 8px;
            background: var(--color-border-light);
            border-radius: var(--radius-full);
            overflow: hidden;
        }
        .wear-bar .bar-fill {
            height: 100%;
            border-radius: var(--radius-full);
            background: var(--color-primary);
        }

        /* FAQ */
        .faq-section {
            padding: 0 0 72px;
        }
        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            cursor: pointer;
            font-weight: 600;
            color: var(--color-dark);
            font-size: 15px;
            list-style: none;
            min-height: 44px;
            gap: 16px;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary .faq-icon {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--color-muted);
            transition: transform var(--transition);
            font-size: 18px;
        }
        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
            color: var(--color-primary);
        }
        .faq-item .faq-answer {
            padding: 0 20px 18px;
            color: var(--color-body);
            font-size: 15px;
            line-height: 1.8;
            background: #F8FAFD;
        }

        /* 品牌介绍 */
        .brand-section {
            padding: 0 0 72px;
        }
        .brand-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 32px 36px;
        }
        .brand-card h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 16px;
        }
        .brand-card p {
            color: var(--color-body);
            line-height: 1.8;
            margin-bottom: 12px;
        }
        .brand-card p:last-child {
            margin-bottom: 0;
        }

        /* CTA */
        .cta-section {
            padding: 0 0 80px;
        }
        .cta-card {
            background: linear-gradient(135deg, #1E293B 0%, #1E3A5F 50%, #1E293B 100%);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-xl);
        }
        .cta-card::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: radial-gradient(rgba(255,255,255,0.04) 1px, transparent 1px);
            background-size: 20px 20px;
            pointer-events: none;
        }
        .cta-card h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-card p {
            color: rgba(255,255,255,0.7);
            font-size: 15px;
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-card .cta-actions {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .cta-card .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255,255,255,0.4);
        }
        .cta-card .btn-outline-light:hover {
            background: rgba(255,255,255,0.1);
            color: #fff;
            border-color: rgba(255,255,255,0.7);
        }

        /* 响应式 */
        @media (min-width: 1024px) {
            .cat-hero-content {
                grid-template-columns: 1fr 1fr;
            }
            .card-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        @media (min-width: 640px) and (max-width: 1023px) {
            .cat-hero-content {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .cat-hero .hero-bg {
                width: 100%;
                opacity: 0.18;
            }
            .hero-stats {
                grid-template-columns: repeat(3, 1fr);
            }
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .cat-hero-text h1 {
                font-size: 30px;
            }
        }
        @media (max-width: 639px) {
            .cat-hero {
                padding: 48px 0 64px;
            }
            .cat-hero-content {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .cat-hero .hero-bg {
                width: 100%;
                opacity: 0.15;
            }
            .cat-hero-text h1 {
                font-size: 26px;
                line-height: 1.35;
            }
            .cat-hero-text .subtitle {
                font-size: 15px;
            }
            .cat-hero-actions {
                flex-direction: column;
            }
            .cat-hero-actions .btn {
                width: 100%;
            }
            .hero-stats {
                grid-template-columns: repeat(3, 1fr);
                gap: 8px;
            }
            .hero-stat-card {
                padding: 14px 10px;
            }
            .hero-stat-card .stat-num {
                font-size: 20px;
            }
            .hero-stat-card .stat-label {
                font-size: 11px;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .filter-bar {
                flex-direction: column;
                align-items: stretch;
                gap: 10px;
                padding: 14px;
            }
            .filter-group {
                flex-wrap: wrap;
                gap: 6px;
            }
            .filter-chip {
                font-size: 12px;
                padding: 5px 10px;
            }
            .filter-select {
                width: 100%;
                font-size: 12px;
            }
            .section-head h2 {
                font-size: 22px;
            }
            .section-head p {
                font-size: 14px;
            }
            .brand-card {
                padding: 24px 20px;
            }
            .brand-card h2 {
                font-size: 20px;
            }
            .cta-card {
                padding: 36px 24px;
            }
            .cta-card h2 {
                font-size: 22px;
            }
            .cta-card .cta-actions .btn {
                width: 100%;
            }
            .compare-table {
                font-size: 12px;
                min-width: 560px;
            }
            .compare-table th,
            .compare-table td {
                padding: 10px 12px;
            }
            .faq-item summary {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-item .faq-answer {
                font-size: 14px;
                padding: 0 16px 14px;
            }
        }

/* roulang page: category3 */
:root {
            --color-primary: #2F6BFF;
            --color-primary-hover: #1D4FCC;
            --color-primary-light: #E3ECFF;
            --color-dark: #1E293B;
            --color-body: #334155;
            --color-muted: #62748E;
            --color-bg: #F5F8FC;
            --color-bg-card: #FFFFFF;
            --color-border: #D9E2EF;
            --color-border-light: #E2E8F0;
            --color-accent: #F59E0B;
            --color-accent-strong: #FF8C42;
            --color-success: #10B981;
            --color-danger: #EF4444;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --radius-xl: 20px;
            --radius-full: 9999px;
            --shadow-sm: 0 1px 3px rgba(15, 39, 66, 0.05);
            --shadow-md: 0 4px 12px rgba(15, 39, 66, 0.06);
            --shadow-lg: 0 8px 24px rgba(15, 39, 66, 0.06);
            --shadow-xl: 0 12px 32px rgba(15, 39, 66, 0.10);
            --shadow-card: 0 8px 24px rgba(15, 39, 66, 0.06);
            --shadow-card-hover: 0 12px 32px rgba(15, 39, 66, 0.10);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 15px;
            font-weight: 400;
            line-height: 1.7;
            color: var(--color-body);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

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

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

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

        .section {
            padding: 64px 0;
        }

        .section-sm {
            padding: 40px 0;
        }

        main {
            display: block;
        }

        /* 本页独有模块样式 */
        .cat3-hero {
            background-color: #F5F8FC;
            padding: 56px 0 48px;
            position: relative;
            overflow: hidden;
        }

        .cat3-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 55%;
            height: 100%;
            background-image: url('/assets/images/coverpic/cover-1.webp');
            background-size: cover;
            background-position: center right;
            opacity: 0.12;
            pointer-events: none;
            border-radius: 0 0 0 40px;
        }

        .cat3-hero .container {
            position: relative;
            z-index: 1;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .hero-title {
            font-size: 34px;
            font-weight: 800;
            color: var(--color-dark);
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-bottom: 14px;
        }

        .hero-subtitle {
            font-size: 16px;
            color: var(--color-muted);
            line-height: 1.7;
            max-width: 560px;
            margin-bottom: 22px;
        }

        .hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 600;
            padding: 12px 24px;
            border-radius: var(--radius-md);
            transition: all 0.2s ease;
            text-decoration: none;
            line-height: 1.5;
            min-height: 44px;
            white-space: nowrap;
        }

        .btn-primary {
            background-color: var(--color-primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(47, 107, 255, 0.3);
        }

        .btn-primary:hover {
            background-color: var(--color-primary-hover);
            color: #fff;
            box-shadow: 0 6px 20px rgba(47, 107, 255, 0.4);
            transform: translateY(-1px);
        }

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

        .btn-accent {
            background-color: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
        }

        .btn-accent:hover {
            background-color: var(--color-accent-strong);
            color: #fff;
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
            transform: translateY(-1px);
        }

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

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

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

        .btn-ghost {
            background-color: transparent;
            color: var(--color-primary);
            padding: 12px 16px;
        }

        .btn-ghost:hover {
            background-color: var(--color-primary-light);
            color: var(--color-primary-hover);
        }

        .hero-metrics {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .metric-card {
            background: #fff;
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            padding: 16px 18px;
            box-shadow: var(--shadow-sm);
            transition: all 0.2s ease;
        }

        .metric-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-border);
        }

        .metric-label {
            font-size: 12px;
            color: var(--color-muted);
            letter-spacing: 0.3px;
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .metric-value {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-dark);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
        }

        .metric-trend {
            font-size: 12px;
            font-weight: 600;
            margin-top: 4px;
        }

        .trend-up {
            color: var(--color-success);
        }

        .trend-down {
            color: var(--color-danger);
        }

        .score-badge {
            display: inline-block;
            background: var(--color-primary-light);
            color: var(--color-primary);
            font-size: 12px;
            font-weight: 700;
            padding: 3px 12px;
            border-radius: var(--radius-full);
            letter-spacing: 0.3px;
        }

        /* 筛选工具栏 */
        .filter-toolbar {
            background: #fff;
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            padding: 20px 24px;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            margin-top: 32px;
        }

        .filter-group {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .filter-label {
            font-size: 13px;
            color: var(--color-muted);
            font-weight: 600;
            white-space: nowrap;
        }

        .filter-chip {
            display: inline-flex;
            align-items: center;
            padding: 6px 14px;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-body);
            background: var(--color-bg);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-full);
            cursor: pointer;
            transition: all 0.2s ease;
            white-space: nowrap;
        }

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

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

        .filter-select {
            padding: 8px 32px 8px 12px;
            font-size: 13px;
            color: var(--color-body);
            background: var(--color-bg);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-sm);
            cursor: pointer;
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2362748E' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 12px center;
        }

        .filter-select:focus {
            outline: 2px solid var(--color-primary);
            outline-offset: 1px;
            border-color: var(--color-primary);
        }

        /* 卡片网格 */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 28px;
        }

        .case-card {
            background: #fff;
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all 0.25s ease;
            display: flex;
            flex-direction: column;
        }

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

        .case-card-img {
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: #E8EDF5;
            position: relative;
        }

        .case-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

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

        .case-card-body {
            padding: 18px 18px 16px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .case-card-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }

        .rarity-badge {
            font-size: 11px;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            letter-spacing: 0.4px;
        }

        .rarity-covert {
            background: #FEF3C7;
            color: #D97706;
        }

        .rarity-classified {
            background: #FCE7F3;
            color: #DB2777;
        }

        .rarity-restricted {
            background: #E0E7FF;
            color: #4F46E5;
        }

        .rarity-milspec {
            background: #D1FAE5;
            color: #059669;
        }

        .case-card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .case-card-desc {
            font-size: 13px;
            color: var(--color-muted);
            line-height: 1.6;
            margin-bottom: 12px;
            flex: 1;
        }

        .case-card-data {
            border-top: 1px solid var(--color-border-light);
            padding-top: 12px;
            margin-top: auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 8px;
        }

        .case-data-item {
            display: flex;
            flex-direction: column;
        }

        .case-data-label {
            font-size: 11px;
            color: var(--color-muted);
            letter-spacing: 0.3px;
        }

        .case-data-value {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-dark);
            font-variant-numeric: tabular-nums;
        }

        .case-data-value.highlight {
            color: var(--color-primary);
        }

        .case-data-value.accent {
            color: var(--color-accent);
        }

        .case-card-footer {
            margin-top: 14px;
            display: flex;
            justify-content: flex-end;
        }

        .card-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color 0.2s ease;
        }

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

        .card-link::after {
            content: '→';
            transition: transform 0.2s ease;
        }

        .card-link:hover::after {
            transform: translateX(3px);
        }

        /* 对比表格 */
        .comparison-table-wrapper {
            background: #fff;
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            margin-top: 28px;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
            min-width: 760px;
        }

        .comparison-table thead th {
            background-color: #F5F8FC;
            color: var(--color-muted);
            font-size: 12px;
            font-weight: 700;
            text-align: left;
            padding: 14px 18px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            border-bottom: 2px solid var(--color-border-light);
            white-space: nowrap;
        }

        .comparison-table tbody td {
            padding: 16px 18px;
            border-bottom: 1px solid var(--color-border-light);
            color: var(--color-body);
            font-variant-numeric: tabular-nums;
            vertical-align: middle;
        }

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

        .comparison-table tbody tr:hover td {
            background-color: #FAFBFE;
        }

        .comparison-table .case-name {
            font-weight: 700;
            color: var(--color-dark);
            font-size: 15px;
        }

        .comparison-table .prob-high {
            color: var(--color-success);
            font-weight: 700;
        }

        .comparison-table .prob-low {
            color: var(--color-danger);
            font-weight: 700;
        }

        .comparison-table .value-high {
            color: var(--color-accent);
            font-weight: 700;
        }

        .recommend-indicator {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-weight: 700;
            color: var(--color-primary);
        }

        .table-scroll {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }

        /* 品牌介绍 */
        .brand-intro {
            background: #fff;
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            box-shadow: var(--shadow-sm);
        }

        .brand-intro h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 12px;
        }

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

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 20px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.2s ease;
        }

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

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-dark);
            list-style: none;
            min-height: 48px;
            gap: 12px;
            transition: background-color 0.2s ease;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '+';
            font-size: 20px;
            font-weight: 400;
            color: var(--color-muted);
            transition: transform 0.2s ease;
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--color-bg);
        }

        .faq-item[open] summary::after {
            transform: rotate(45deg);
            content: '−';
            color: var(--color-primary);
        }

        .faq-item[open] summary {
            background: #FAFBFE;
        }

        .faq-item .faq-answer {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--color-body);
            line-height: 1.8;
        }

        /* CTA */
        .cat3-cta {
            background: linear-gradient(135deg, #F5F8FC 0%, #E3ECFF 100%);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-xl);
            padding: 40px 36px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cat3-cta::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 45%;
            height: 180%;
            background-image: url('/assets/images/coverpic/cover-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            pointer-events: none;
            transform: rotate(8deg);
            border-radius: 30px;
        }

        .cat3-cta .container {
            position: relative;
            z-index: 1;
        }

        .cat3-cta h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 8px;
        }

        .cat3-cta p {
            font-size: 15px;
            color: var(--color-muted);
            margin-bottom: 20px;
        }

        .cat3-cta .btn {
            margin: 0 6px;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

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

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

        @media (max-width: 768px) {
            .section {
                padding: 44px 0;
            }

            .cat3-hero {
                padding: 40px 0 32px;
            }

            .hero-title {
                font-size: 26px;
            }

            .hero-subtitle {
                font-size: 15px;
            }

            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .filter-toolbar {
                padding: 16px 18px;
                gap: 12px;
                flex-direction: column;
                align-items: flex-start;
            }

            .filter-group {
                width: 100%;
            }

            .filter-chip {
                padding: 6px 12px;
                font-size: 12px;
            }

            .filter-select {
                width: 100%;
            }

            .cards-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

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

            .comparison-table-wrapper {
                margin-top: 16px;
                border-radius: var(--radius-md);
            }

            .comparison-table thead th {
                padding: 10px 14px;
                font-size: 11px;
            }

            .comparison-table tbody td {
                padding: 12px 14px;
                font-size: 13px;
            }

            .brand-intro {
                padding: 20px 18px;
            }

            .brand-intro h2 {
                font-size: 19px;
            }

            .cat3-cta {
                padding: 30px 20px;
                border-radius: var(--radius-lg);
            }

            .cat3-cta h2 {
                font-size: 20px;
            }
        }

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

            .hero-title {
                font-size: 22px;
            }

            .metric-value {
                font-size: 21px;
            }

            .metric-card {
                padding: 12px 14px;
            }

            .case-card-data {
                grid-template-columns: 1fr 1fr;
                gap: 6px;
            }

            .faq-item summary {
                font-size: 14px;
                padding: 14px 16px;
            }

            .faq-item .faq-answer {
                padding: 0 16px 14px;
                font-size: 13px;
            }

            .btn {
                padding: 10px 18px;
                font-size: 13px;
                min-height: 40px;
            }
        }

/* roulang page: category4 */
:root {
            --color-primary: #2F6BFF;
            --color-primary-hover: #1e4fd6;
            --color-primary-light: #eaf0ff;
            --color-dark: #1E293B;
            --color-body: #334155;
            --color-muted: #62748E;
            --color-bg: #F5F8FC;
            --color-bg-card: #ffffff;
            --color-border: #E2E8F0;
            --color-border-light: #eef2f7;
            --color-accent: #F59E0B;
            --color-accent-strong: #FF8C42;
            --color-success: #10b981;
            --color-danger: #ef4444;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 14px;
            --radius-xl: 18px;
            --radius-full: 9999px;
            --shadow-sm: 0 1px 3px rgba(15, 39, 66, 0.04);
            --shadow-md: 0 8px 24px rgba(15, 39, 66, 0.06);
            --shadow-lg: 0 12px 32px rgba(15, 39, 66, 0.10);
            --shadow-xl: 0 20px 48px rgba(15, 39, 66, 0.14);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-body);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border: 0;
        }
        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--color-primary-hover);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        :focus-visible {
            outline: 2px solid var(--color-primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .bg-card {
            background-color: var(--color-bg-card);
        }
        .shadow-card {
            box-shadow: var(--shadow-md);
        }
        .shadow-card-hover:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            transition: box-shadow 0.25s ease, transform 0.25s ease;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 20px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 15px;
            transition: all 0.2s ease;
            white-space: nowrap;
            text-decoration: none;
            cursor: pointer;
        }
        .btn:active {
            transform: scale(0.98);
        }
        .btn-primary {
            background-color: var(--color-primary);
            color: #fff;
        }
        .btn-primary:hover {
            background-color: var(--color-primary-hover);
            color: #fff;
        }
        .btn-accent {
            background-color: var(--color-accent);
            color: #fff;
        }
        .btn-accent:hover {
            background-color: #d98607;
            color: #fff;
        }
        .btn-outline {
            background-color: transparent;
            color: var(--color-primary);
            border: 1.5px solid var(--color-primary);
        }
        .btn-outline:hover {
            background-color: var(--color-primary-light);
            color: var(--color-primary-hover);
            border-color: var(--color-primary-hover);
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
            border-radius: var(--radius-lg);
        }
        .tag-capsule {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: var(--radius-full);
            font-size: 12px;
            font-weight: 600;
            line-height: 1.5;
            white-space: nowrap;
        }
        .tag-blue {
            background-color: var(--color-primary-light);
            color: var(--color-primary);
        }
        .tag-green {
            background-color: #d1fae5;
            color: #059669;
        }
        .tag-orange {
            background-color: #fef3c7;
            color: #d97706;
        }
        .tag-red {
            background-color: #fee2e2;
            color: #dc2626;
        }
        .tag-slate {
            background-color: #f1f5f9;
            color: #475569;
        }

        .category-hero {
            position: relative;
            padding: 80px 0 60px;
            background-color: var(--color-bg);
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background-image: url('/assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            pointer-events: none;
            z-index: 0;
        }
        .category-hero .container {
            position: relative;
            z-index: 1;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .hero-title {
            font-size: 36px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--color-dark);
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }
        .hero-subtitle {
            font-size: 17px;
            color: var(--color-muted);
            line-height: 1.75;
            margin-bottom: 28px;
            max-width: 520px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .hero-image-wrap {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            height: 320px;
        }
        .hero-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .hero-image-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(30, 41, 59, 0.45) 0%, rgba(30, 41, 59, 0.1) 60%);
            display: flex;
            align-items: flex-end;
            padding: 24px;
        }
        .hero-image-label {
            color: #fff;
            font-size: 14px;
            font-weight: 500;
            background: rgba(30, 41, 59, 0.65);
            padding: 8px 16px;
            border-radius: var(--radius-full);
            backdrop-filter: blur(4px);
        }
        .metric-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: 48px;
        }
        .metric-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            padding: 20px 18px;
            box-shadow: var(--shadow-sm);
        }
        .metric-label {
            font-size: 13px;
            color: var(--color-muted);
            font-weight: 500;
            margin-bottom: 8px;
        }
        .metric-value {
            font-size: 28px;
            font-weight: 800;
            color: var(--color-dark);
            font-variant-numeric: tabular-nums;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }
        .metric-trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 600;
            margin-left: 8px;
            vertical-align: middle;
        }
        .metric-trend.up {
            color: var(--color-success);
        }
        .metric-trend.down {
            color: var(--color-danger);
        }

        .section {
            padding: 72px 0;
        }
        .section-header {
            margin-bottom: 40px;
        }
        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--color-dark);
            letter-spacing: -0.01em;
            margin-bottom: 10px;
        }
        .section-desc {
            font-size: 16px;
            color: var(--color-muted);
            line-height: 1.7;
            max-width: 680px;
        }

        .filter-toolbar {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            padding: 20px 24px;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: flex-end;
            margin-bottom: 32px;
        }
        .filter-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .filter-label {
            font-size: 12px;
            font-weight: 600;
            color: var(--color-muted);
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }
        .filter-select {
            min-width: 150px;
            padding: 9px 14px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            background: #fff;
            font-size: 14px;
            color: var(--color-body);
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2362748E' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 12px center;
            padding-right: 36px;
            cursor: pointer;
        }
        .filter-select:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 2px rgba(47, 107, 255, 0.15);
            outline: none;
        }
        .filter-btn {
            padding: 10px 22px;
            background: var(--color-primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 14px;
            transition: background-color 0.2s ease;
            white-space: nowrap;
        }
        .filter-btn:hover {
            background-color: var(--color-primary-hover);
        }

        .comparison-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .comparison-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 0.25s ease, transform 0.25s ease;
        }
        .comparison-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .card-image {
            position: relative;
            height: 180px;
            overflow: hidden;
        }
        .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .comparison-card:hover .card-image img {
            transform: scale(1.04);
        }
        .card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }
        .card-body {
            padding: 20px 22px 22px;
        }
        .card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-text {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.65;
            margin-bottom: 14px;
        }
        .card-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 12px;
            color: var(--color-muted);
            padding-top: 12px;
            border-top: 1px solid var(--color-border-light);
        }
        .card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .card-link {
            display: inline-block;
            margin-top: 14px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
        }
        .card-link:hover {
            color: var(--color-primary-hover);
        }

        .data-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-border-light);
            box-shadow: var(--shadow-sm);
            background: var(--color-bg-card);
        }
        .data-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
            min-width: 720px;
        }
        .data-table thead {
            background-color: #f1f5f9;
        }
        .data-table th {
            text-align: left;
            padding: 14px 18px;
            font-weight: 700;
            color: var(--color-dark);
            font-size: 13px;
            letter-spacing: 0.02em;
            white-space: nowrap;
            border-bottom: 2px solid var(--color-border);
        }
        .data-table td {
            padding: 14px 18px;
            color: var(--color-body);
            border-bottom: 1px solid var(--color-border-light);
            font-variant-numeric: tabular-nums;
            white-space: nowrap;
        }
        .data-table tbody tr:last-child td {
            border-bottom: none;
        }
        .data-table tbody tr:hover td {
            background-color: #f8fafc;
        }
        .table-highlight {
            color: var(--color-accent-strong);
            font-weight: 700;
        }
        .table-tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            font-size: 12px;
            font-weight: 600;
        }
        .table-tag.safe {
            background-color: #d1fae5;
            color: #059669;
        }
        .table-tag.warn {
            background-color: #fef3c7;
            color: #d97706;
        }
        .table-tag.risk {
            background-color: #fee2e2;
            color: #dc2626;
        }

        .safety-tips {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .safety-tip-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .safety-tip-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 18px;
            font-weight: 700;
        }
        .safety-tip-icon.blue {
            background: var(--color-primary-light);
            color: var(--color-primary);
        }
        .safety-tip-icon.green {
            background: #d1fae5;
            color: #059669;
        }
        .safety-tip-icon.orange {
            background: #fef3c7;
            color: #d97706;
        }
        .safety-tip-icon.red {
            background: #fee2e2;
            color: #dc2626;
        }
        .safety-tip-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 6px;
        }
        .safety-tip-text {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.65;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 0.2s ease;
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-dark);
            text-align: left;
            gap: 16px;
            background: transparent;
            transition: background-color 0.2s ease;
        }
        .faq-question:hover {
            background-color: #f8fafc;
        }
        .faq-icon {
            flex-shrink: 0;
            color: var(--color-muted);
            font-size: 18px;
            transition: transform 0.25s ease;
            font-weight: 400;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            color: var(--color-primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 22px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 20px;
        }
        .faq-answer p {
            font-size: 15px;
            color: var(--color-muted);
            line-height: 1.75;
        }

        .cta-panel {
            background: var(--color-primary);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 24px;
            position: relative;
            overflow: hidden;
        }
        .cta-panel::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            pointer-events: none;
        }
        .cta-panel::after {
            content: '';
            position: absolute;
            bottom: -80px;
            right: 120px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 1;
            flex: 1;
            min-width: 260px;
        }
        .cta-title {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .cta-text {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.78);
            line-height: 1.65;
            max-width: 520px;
        }
        .cta-actions {
            position: relative;
            z-index: 1;
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .cta-actions .btn {
            border-radius: var(--radius-md);
        }
        .btn-white {
            background: #fff;
            color: var(--color-primary);
        }
        .btn-white:hover {
            background: #f1f5f9;
            color: var(--color-primary-hover);
        }
        .btn-ghost-white {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.5);
        }
        .btn-ghost-white:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            border-color: #fff;
        }

        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-image-wrap {
                height: 240px;
            }
            .mentor-title {
                font-size: 30px;
            }
            .metric-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .comparison-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .safety-tips {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            .category-hero {
                padding: 56px 0 40px;
            }
            .hero-title {
                font-size: 26px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 22px;
            }
            .filter-toolbar {
                flex-direction: column;
                align-items: stretch;
                gap: 12px;
                padding: 16px;
            }
            .filter-select {
                width: 100%;
                min-width: auto;
            }
            .comparison-grid {
                grid-template-columns: 1fr;
            }
            .hero-image-wrap {
                height: 180px;
            }
            .metric-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .metric-value {
                font-size: 22px;
            }
            .cta-panel {
                flex-direction: column;
                text-align: left;
                align-items: flex-start;
                padding: 32px 24px;
            }
            .cta-actions {
                width: 100%;
            }
            .cta-actions .btn {
                flex: 1;
                justify-content: center;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-title {
                font-size: 22px;
            }
            .metric-strip {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 20px;
            }
            .card-body {
                padding: 16px;
            }
            .card-image {
                height: 150px;
            }
            .safety-tip-card {
                padding: 18px;
                flex-direction: column;
                gap: 12px;
            }
            .cta-panel {
                padding: 24px 18px;
            }
        }