/* roulang page: index */
/* 设计变量 */
        :root {
            --color-primary: #0F2A5F;
            --color-secondary: #00C9C8;
            --color-background: #F9FAFB;
            --color-text: #1F2937;
            --color-text-light: #6B7280;
            --color-border: #E5E7EB;
            --color-success: #10B981;
            --color-warning: #F59E0B;
            --color-error: #EF4444;
            --color-white: #FFFFFF;
            --radius-base: 8px;
            --radius-button: 6px;
            --radius-card: 12px;
            --shadow-card: 0 2px 8px rgba(15, 42, 95, 0.08);
            --shadow-hover: 0 8px 16px rgba(0, 201, 200, 0.15);
            --shadow-button: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --spacing-unit: 8px;
            --container-width: 1200px;
            --font-title: 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-body: 'Helvetica Neue', Helvetica, Arial, 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
        }

        /* 基础重置 */
        *, *::before, *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.6;
            color: var(--color-text);
            background-color: var(--color-background);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-title);
            font-weight: 600;
            line-height: 1.3;
            margin-top: 0;
            color: var(--color-primary);
        }

        h1 { font-size: 2.5rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.25rem; }

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

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

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

        /* 容器 */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 calc(var(--spacing-unit) * 4);
        }

        .section {
            padding: calc(var(--spacing-unit) * 8) 0;
        }

        @media (max-width: 1024px) {
            .container {
                padding: 0 calc(var(--spacing-unit) * 3);
            }
            .section {
                padding: calc(var(--spacing-unit) * 6) 0;
            }
        }

        @media (max-width: 640px) {
            .container {
                padding: 0 calc(var(--spacing-unit) * 2);
            }
            .section {
                padding: calc(var(--spacing-unit) * 4) 0;
            }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.75rem; }
            h3 { font-size: 1.35rem; }
        }

        /* 导航 */
        .site-header {
            background-color: var(--color-white);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: calc(var(--spacing-unit) * 2) 0;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: calc(var(--spacing-unit) * 2);
            font-weight: 700;
            font-size: 1.5rem;
            color: var(--color-primary);
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
            border-radius: var(--radius-base);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 1.2rem;
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: calc(var(--spacing-unit) * 4);
        }

        .nav-link {
            color: var(--color-text);
            font-weight: 500;
            padding: calc(var(--spacing-unit) * 1.5) 0;
            position: relative;
        }

        .nav-link:hover, .nav-link.active {
            color: var(--color-secondary);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--color-secondary);
            border-radius: 1px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 4);
            border-radius: var(--radius-button);
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            border: none;
            text-align: center;
            white-space: nowrap;
            font-size: 1rem;
        }

        .btn-primary {
            background-color: var(--color-secondary);
            color: var(--color-white);
            box-shadow: var(--shadow-button);
        }

        .btn-primary:hover {
            background-color: #00B4B3;
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0, 201, 200, 0.25);
        }

        .btn-secondary {
            background-color: transparent;
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
        }

        .btn-secondary:hover {
            background-color: var(--color-primary);
            color: var(--color-white);
        }

        /* 移动端底部导航 */
        .nav-mobile {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-top: 1px solid var(--color-border);
            padding: calc(var(--spacing-unit) * 1.5) 0;
            z-index: 1000;
        }

        .nav-mobile-list {
            display: flex;
            justify-content: space-around;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-mobile-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
            font-size: 0.75rem;
            color: var(--color-text-light);
        }

        .nav-mobile-item.active {
            color: var(--color-secondary);
        }

        .nav-mobile-icon {
            font-size: 1.25rem;
        }

        @media (max-width: 640px) {
            .nav-desktop {
                display: none;
            }
            .nav-mobile {
                display: block;
            }
            body {
                padding-bottom: 70px;
            }
        }

        /* Hero */
        .hero {
            background-color: var(--color-background);
            padding-top: calc(var(--spacing-unit) * 12);
            padding-bottom: calc(var(--spacing-unit) * 12);
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 60%;
            height: 100%;
            background: url('/assets/images/backpic/back-1.webp') no-repeat center right;
            background-size: contain;
            opacity: 0.7;
            z-index: 0;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            max-width: 600px;
        }

        .hero h1 {
            margin-bottom: calc(var(--spacing-unit) * 3);
            line-height: 1.2;
        }

        .hero-subtitle {
            font-size: 1.25rem;
            color: var(--color-text-light);
            margin-bottom: calc(var(--spacing-unit) * 5);
            line-height: 1.6;
        }

        .hero-buttons {
            display: flex;
            gap: calc(var(--spacing-unit) * 3);
            flex-wrap: wrap;
        }

        @media (max-width: 1024px) {
            .hero::before {
                width: 50%;
                opacity: 0.5;
            }
        }

        @media (max-width: 768px) {
            .hero {
                padding-top: calc(var(--spacing-unit) * 8);
                padding-bottom: calc(var(--spacing-unit) * 8);
            }
            .hero::before {
                width: 100%;
                opacity: 0.2;
                background-size: cover;
            }
            .hero-content {
                max-width: 100%;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* 卡片 */
        .card {
            background-color: var(--color-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: calc(var(--spacing-unit) * 3);
            height: 100%;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

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

        .card-icon {
            width: 56px;
            height: 56px;
            background-color: rgba(0, 201, 200, 0.1);
            border-radius: var(--radius-base);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-secondary);
            font-size: 1.5rem;
            margin-bottom: calc(var(--spacing-unit) * 3);
        }

        .card-title {
            margin-bottom: calc(var(--spacing-unit) * 2);
        }

        .card-text {
            color: var(--color-text-light);
            margin-bottom: calc(var(--spacing-unit) * 3);
        }

        .card-link {
            color: var(--color-secondary);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .card-link i {
            transition: transform 0.2s ease;
        }

        .card-link:hover i {
            transform: translateX(4px);
        }

        /* 特性区块 */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: calc(var(--spacing-unit) * 4);
            margin-top: calc(var(--spacing-unit) * 6);
        }

        .feature-item {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: calc(var(--spacing-unit) * 6);
            align-items: center;
            margin-bottom: calc(var(--spacing-unit) * 8);
        }

        .feature-item:nth-child(even) .feature-image {
            order: 2;
        }

        .feature-item:nth-child(even) .feature-content {
            order: 1;
        }

        .feature-image img {
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
        }

        .feature-content h3 {
            margin-bottom: calc(var(--spacing-unit) * 2);
        }

        @media (max-width: 768px) {
            .feature-item {
                grid-template-columns: 1fr;
                gap: calc(var(--spacing-unit) * 4);
            }
            .feature-item:nth-child(even) .feature-image,
            .feature-item:nth-child(even) .feature-content {
                order: unset;
            }
        }

        /* 场景 */
        .scenes-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: calc(var(--spacing-unit) * 4);
            margin-top: calc(var(--spacing-unit) * 6);
        }

        .scene-card {
            padding: calc(var(--spacing-unit) * 4);
            background-color: var(--color-white);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border-top: 4px solid var(--color-secondary);
        }

        .scene-icon {
            font-size: 2rem;
            color: var(--color-secondary);
            margin-bottom: calc(var(--spacing-unit) * 3);
        }

        /* 客户案例 */
        .clients {
            background-color: #F3F4F6;
            border-radius: var(--radius-card);
            padding: calc(var(--spacing-unit) * 6);
            margin-top: calc(var(--spacing-unit) * 6);
        }

        .client-logos {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: calc(var(--spacing-unit) * 6);
            align-items: center;
            margin-top: calc(var(--spacing-unit) * 4);
        }

        .client-logo {
            filter: grayscale(100%);
            opacity: 0.7;
            transition: filter 0.3s ease, opacity 0.3s ease;
            height: 40px;
        }

        .client-logo:hover {
            filter: grayscale(0%);
            opacity: 1;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary) 0%, #1E3A8A 100%);
            color: var(--color-white);
            text-align: center;
            border-radius: var(--radius-card);
            padding: calc(var(--spacing-unit) * 10) calc(var(--spacing-unit) * 4);
            margin-top: calc(var(--spacing-unit) * 8);
        }

        .cta-section h2 {
            color: var(--color-white);
            margin-bottom: calc(var(--spacing-unit) *3);
        }

        .cta-section p {
            font-size: 1.125rem;
            max-width: 600px;
            margin: 0 auto calc(var(--spacing-unit) * 6);
            opacity: 0.9;
            line-height: 1.7;
        }

        .cta-buttons {
            display: flex;
            gap: calc(var(--spacing-unit) * 3);
            justify-content: center;
            flex-wrap: wrap;
        }

        .cta-buttons .btn {
            min-width: 180px;
        }

        /* 页脚 */
        .site-footer {
            background-color: var(--color-primary);
            color: #D1D5DB;
            padding: calc(var(--spacing-unit) * 10) 0 calc(var(--spacing-unit) * 4);
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: calc(var(--spacing-unit) * 6);
            margin-bottom: calc(var(--spacing-unit) * 8);
        }

        .footer-brand h3 {
            color: var(--color-white);
            font-size: 1.5rem;
            margin-bottom: calc(var(--spacing-unit) * 3);
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: calc(var(--spacing-unit) * 2);
            margin-bottom: calc(var(--spacing-unit) * 4);
        }

        .footer-logo-icon {
            width: 32px;
            height: 32px;
            background: var(--color-secondary);
            border-radius: var(--radius-base);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 1rem;
        }

        .footer-logo-text {
            color: var(--color-white);
            font-weight: 700;
            font-size: 1.25rem;
        }

        .footer-about {
            line-height: 1.7;
            opacity: 0.8;
        }

        .footer-column h4 {
            color: var(--color-white);
            font-size: 1.125rem;
            margin-bottom: calc(var(--spacing-unit) * 3);
        }

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

        .footer-links li {
            margin-bottom: calc(var(--spacing-unit) * 2);
        }

        .footer-links a {
            color: #D1D5DB;
            opacity: 0.8;
            transition: opacity 0.2s ease, color 0.2s ease;
        }

        .footer-links a:hover {
            color: var(--color-secondary);
            opacity: 1;
        }

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

        .footer-contact li {
            margin-bottom: calc(var(--spacing-unit) * 3);
            display: flex;
            align-items: flex-start;
            gap: calc(var(--spacing-unit) * 2);
        }

        .footer-contact i {
            color: var(--color-secondary);
            width: 20px;
            font-size: 1rem;
            margin-top: 2px;
        }

        .social-icons {
            display: flex;
            gap: calc(var(--spacing-unit) * 3);
            margin-top: calc(var(--spacing-unit) * 4);
        }

        .social-icon {
            width: 36px;
            height: 36px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #D1D5DB;
            transition: all 0.2s ease;
        }

        .social-icon:hover {
            background-color: var(--color-secondary);
            color: var(--color-white);
            transform: translateY(-2px);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: calc(var(--spacing-unit) * 4);
            text-align: center;
            font-size: 0.875rem;
            opacity: 0.7;
        }

        @media (max-width: 1024px) {
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
                gap: calc(var(--spacing-unit) * 8);
            }
        }

        @media (max-width: 640px) {
            .footer-content {
                grid-template-columns: 1fr;
                gap: calc(var(--spacing-unit) * 6);
            }
        }

        /* 工具类 */
        .text-center {
            text-align: center;
        }

        .mb-1 { margin-bottom: calc(var(--spacing-unit) * 1); }
        .mb-2 { margin-bottom: calc(var(--spacing-unit) * 2); }
        .mb-3 { margin-bottom: calc(var(--spacing-unit) * 3); }
        .mb-4 { margin-bottom: calc(var(--spacing-unit) * 4); }
        .mb-6 { margin-bottom: calc(var(--spacing-unit) * 6); }
        .mb-8 { margin-bottom: calc(var(--spacing-unit) * 8); }

        .mt-2 { margin-top: calc(var(--spacing-unit) * 2); }
        .mt-4 { margin-top: calc(var(--spacing-unit) * 4); }
        .mt-6 { margin-top: calc(var(--spacing-unit) * 6); }

/* roulang page: category1 */
/* ====== 设计变量 ====== */
        :root {
            /* 品牌色 */
            --color-primary: #0F2A5F;
            --color-secondary: #00C9C8;
            --color-background: #F9FAFB;
            --color-success: #10B981;
            --color-warning: #F59E0B;
            --color-error: #EF4444;
            /* 中性色 */
            --color-white: #FFFFFF;
            --color-gray-50: #F9FAFB;
            --color-gray-100: #F3F4F6;
            --color-gray-200: #E5E7EB;
            --color-gray-300: #D1D5DB;
            --color-gray-400: #9CA3AF;
            --color-gray-500: #6B7280;
            --color-gray-700: #374151;
            --color-gray-900: #111827;
            /* 字体 */
            --font-heading: "PingFang SC", "Microsoft YaHei", sans-serif;
            --font-body: "Helvetica Neue", Helvetica, Arial, "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --font-base-size: 16px;
            /* 间距 */
            --space-unit: 8px;
            --space-xs: calc(var(--space-unit) * 1); /* 8px */
            --space-sm: calc(var(--space-unit) * 2); /* 16px */
            --space-md: calc(var(--space-unit) * 3); /* 24px */
            --space-lg: calc(var(--space-unit) * 4); /* 32px */
            --space-xl: calc(var(--space-unit) * 6); /* 48px */
            --space-2xl: calc(var(--space-unit) * 8); /* 64px */
            /* 圆角 */
            --radius-sm: 6px;
            --radius-base: 8px;
            --radius-lg: 12px;
            /* 阴影 */
            --shadow-card: 0 2px 8px rgba(15, 42, 95, 0.08);
            --shadow-card-hover: 0 8px 20px rgba(0, 201, 200, 0.15);
            --shadow-focus: 0 0 0 3px rgba(0, 201, 200, 0.3);
        }

        /* ====== 基础重置 ====== */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            font-size: var(--font-base-size);
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-body);
            line-height: 1.6;
            color: var(--color-gray-700);
            background-color: var(--color-white);
            font-weight: 400;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            font-weight: 600;
            line-height: 1.2;
            color: var(--color-gray-900);
            margin-bottom: var(--space-lg);
        }
        h1 {
            font-size: 2.5rem; /* 40px */
            margin-bottom: var(--space-lg);
        }
        h2 {
            font-size: 2rem; /* 32px */
            margin-bottom: var(--space-lg);
        }
        h3 {
            font-size: 1.5rem; /* 24px */
            margin-bottom: var(--space-md);
        }
        h4 {
            font-size: 1.25rem; /* 20px */
            margin-bottom: var(--space-sm);
        }
        p {
            margin-bottom: var(--space-md);
        }
        a {
            color: var(--color-secondary);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #00B4B3;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        ul, ol {
            margin-bottom: var(--space-md);
            padding-left: var(--space-lg);
        }
        li {
            margin-bottom: var(--space-xs);
        }

        /* ====== 全局容器 ====== */
        .container {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: var(--space-lg);
            padding-right: var(--space-lg);
        }
        @media (max-width: 768px) {
            .container {
                padding-left: var(--space-md);
                padding-right: var(--space-md);
            }
        }

        /* ====== 按钮 ====== */
        .btn {
            display: inline-block;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            text-align: center;
            cursor: pointer;
            border: none;
            transition: all 0.25s ease;
            font-family: var(--font-heading);
        }
        .btn-primary {
            background-color: var(--color-secondary);
            color: var(--color-white);
        }
        .btn-primary:hover {
            background-color: #00B4B3;
            color: var(--color-white);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background-color: transparent;
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
        }
        .btn-secondary:hover {
            background-color: var(--color-primary);
            color: var(--color-white);
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.125rem;
        }
        .btn-block {
            display: block;
            width: 100%;
        }

        /* ====== 卡片 ====== */
        .card {
            background-color: var(--color-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: var(--space-xl);
            transition: all 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .card-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 64px;
            height: 64px;
            background-color: rgba(0, 201, 200, 0.1);
            border-radius: var(--radius-base);
            margin-bottom: var(--space-lg);
        }
        .card-icon i {
            font-size: 1.75rem;
            color: var(--color-secondary);
        }

        /* ====== 导航样式 (复用首页) ====== */
        .site-header {
            background-color: var(--color-background);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(15, 42, 95, 0.05);
            padding: var(--space-sm) 0;
        }
        .header-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .logo {
            display: flex;
            align-items: center;
            text-decoration: none;
            font-weight: 700;
            font-size: 1.5rem;
            color: var(--color-primary);
            font-family: var(--font-heading);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            color: var(--color-white);
            border-radius: var(--radius-base);
            margin-right: var(--space-sm);
            font-weight: 700;
        }
        .nav-desktop {
            display: flex;
            align-items: center;
            gap: var(--space-xl);
        }
        .nav-link {
            color: var(--color-gray-700);
            font-weight: 500;
            position: relative;
            padding: var(--space-xs) 0;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--color-secondary);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 2px;
            background-color: var(--color-secondary);
        }
        /* 移动端底部Tab导航 */
        .nav-mobile {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-top: 1px solid var(--color-gray-200);
            z-index: 999;
            padding: var(--space-sm) 0;
        }
        .nav-mobile-inner {
            display: flex;
            justify-content: space-around;
            max-width: 500px;
            margin: 0 auto;
        }
        .nav-mobile-link {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-decoration: none;
            color: var(--color-gray-400);
            font-size: 0.75rem;
            transition: color 0.2s ease;
        }
        .nav-mobile-link i {
            font-size: 1.25rem;
            margin-bottom: 4px;
        }
        .nav-mobile-link.active {
            color: var(--color-secondary);
        }
        .nav-mobile-link:hover {
            color: var(--color-primary);
        }
        @media (max-width: 640px) {
            .nav-desktop {
                display: none;
            }
            .nav-mobile {
                display: block;
            }
            .site-header {
                padding-bottom: 60px; /* 为底部Tab留空间 */
            }
        }

        /* ====== 分类页 Hero ====== */
        .category-hero {
            padding: var(--space-2xl) 0;
            background-color: var(--color-background);
            background-image: linear-gradient(to bottom, rgba(249, 250, 251, 0.9), rgba(249, 250, 251, 1)), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center 30%;
            margin-bottom: var(--space-2xl);
            text-align: center;
        }
        .category-hero h1 {
            color: var(--color-primary);
            margin-bottom: var(--space-md);
        }
        .category-hero .subtitle {
            font-size: 1.25rem;
            color: var(--color-gray-500);
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ====== 页面主要内容区块 ====== */
        .section {
            padding: var(--space-2xl) 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: var(--space-2xl);
        }
        .section-title h2 {
            color: var(--color-primary);
        }
        .section-title .lead {
            font-size: 1.125rem;
            color: var(--color-gray-500);
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: var(--space-xl);
            margin-bottom: var(--space-2xl);
        }
        .feature-card {
            background-color: var(--color-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: var(--space-xl);
            transition: all 0.3s ease;
            border: 1px solid var(--color-gray-100);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--color-secondary);
        }
        .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            background-color: rgba(15, 42, 95, 0.05);
            border-radius: var(--radius-base);
            margin-bottom: var(--space-lg);
            color: var(--color-primary);
            font-size: 1.5rem;
        }
        .feature-list {
            list-style: none;
            padding-left: 0;
        }
        .feature-list li {
            position: relative;
            padding-left: var(--space-lg);
            margin-bottom: var(--space-sm);
        }
        .feature-list li:before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--color-success);
            font-weight: bold;
        }

        /* ====== 功能对比表格 ====== */
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            margin-bottom: var(--space-2xl);
            box-shadow: var(--shadow-card);
            border-radius: var(--radius-base);
            overflow: hidden;
        }
        .comparison-table th, .comparison-table td {
            padding: var(--space-lg);
            text-align: left;
            border-bottom: 1px solid var(--color-gray-200);
        }
        .comparison-table thead th {
            background-color: var(--color-primary);
            color: var(--color-white);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .comparison-table tbody tr:nth-child(even) {
            background-color: var(--color-gray-50);
        }
        .comparison-table tbody tr:hover {
            background-color: rgba(0, 201, 200, 0.05");
        }
        .comparison-table .highlight {
            background-color: rgba(0, 201, 200, 0.1);
            border-left: 3px solid var(--color-secondary);
        }
        @media (max-width: 768px) {
            .comparison-table {
                display: block;
                overflow-x: auto;
            }
        }

        /* ====== FAQ 组件 ====== */
        .faq-section {
            background-color: var(--color-gray-50);
            border-radius: var(--radius-lg);
            padding: var(--space-2xl);
        }
        .faq-item {
            margin-bottom: var(--space-md);
            border-bottom: 1px solid var(--color-gray-200);
            padding-bottom: var(--space-md);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.125rem;
            color: var(--color-gray-900);
            padding: var(--space-sm) 0;
        }
        .faq-question:hover {
            color: var(--color-secondary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            color: var(--color-gray-600);
            line-height: 1.7;
        }
        .faq-answer.open {
            max-height: 500px;
            padding-top: var(--space-sm);
        }
        .faq-icon {
            transition: transform 0.3s ease;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        /* ====== CTA 横幅 ====== */
        .cta-banner {
            background-color: #E6FFFA;
            border: 1px solid rgba(0, 201, 200, 0.2);
            border-radius: var(--radius-lg);
            padding: var(--space-2xl);
            text-align: center;
            margin: var(--space-2xl) 0;
        }
        .cta-banner h3 {
            color: var(--color-primary);
            margin-bottom: var(--space-md);
        }
        .cta-banner p {
            color: var(--color-gray-600);
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            margin-bottom: var(--space-xl);
        }

        /* ====== 页脚样式 (复用首页) ====== */
        .site-footer {
            background-color: var(--color-primary);
            color: var(--color-gray-300);
            padding: var(--space-2xl) 0 var(--space-xl);
            margin-top: var(--space-2xl);
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--space-2xl);
            margin-bottom: var(--space-2xl);
        }
        .footer-brand {
            grid-column: span 1;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            margin-bottom: var(--space-lg);
        }
        .footer-logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background-color: var(--color-secondary);
            color: var(--color-white);
            border-radius: var(--radius-sm);
            margin-right: var(--space-sm);
            font-weight: 700;
        }
        .footer-logo-text {
            color: var(--color-white);
            font-weight: 700;
            font-size: 1.25rem;
            font-family: var(--font-heading);
        }
        .footer-about {
            margin-bottom: var(--space-lg);
            font-size: 0.95rem;
            line-height: 1.6;
            opacity: 0.9;
        }
        .social-icons {
            display: flex;
            gap: var(--space-md);
        }
        .social-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            color: var(--color-white);
            transition: all 0.2s ease;
        }
        .social-icon:hover {
            background-color: var(--color-secondary);
            transform: translateY(-2px);
        }
        .footer-column h4 {
            color: var(--color-white);
            margin-bottom: var(--space-lg);
            font-size: 1.125rem;
        }
        .footer-links {
            list-style: none;
            padding-left: 0;
        }
        .footer-links li {
            margin-bottom: var(--space-sm);
        }
        .footer-links a {
            color: var(--color-gray-300);
            transition: color 0.2s ease;
        }
        .footer-links a:hover {
            color: var(--color-secondary);
        }
        .footer-contact {
            list-style: none;
            padding-left: 0;
        }
        .footer-contact li {
            display: flex;
            align-items: flex-start;
            margin-bottom: var(--space-sm);
        }
        .footer-contact i {
            color: var(--color-secondary);
            margin-right: var(--space-sm);
            margin-top: 4px;
            min-width: 16px;
        }
        .footer-bottom {
            text-align: center;
            padding-top: var(--space-lg);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.875rem;
            opacity: 0.8;
        }
        @media (max-width: 1024px) {
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--space-xl);
            }
        }
        @media (max-width: 640px) {
            .footer-content {
                grid-template-columns: 1fr;
                gap: var(--space-xl);
            }
        }

        /* ====== 移动端响应式调整 ====== */
        @media (max-width: 1024px) {
            h1 {
                font-size: 2.25rem;
            }
            h2 {
                font-size: 1.75rem;
            }
        }
        @media (max-width: 768px) {
            .section {
                padding: var(--space-xl) 0;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .category-hero {
                padding: var(--space-xl) 0;
                margin-bottom: var(--space-xl);
            }
            .cta-banner {
                padding: var(--space-xl) var(--space-lg);
            }
        }
        @media (max-width: 640px) {
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .btn {
                padding: 10px 24px;
                font-size: 0.95rem;
            }
            .faq-section {
                padding: var(--space-xl) var(--space-lg);
            }
        }