:root {
            --primary-color: #2c6ae5;
            --secondary-color: #5d34a2;
            --accent-color: #ff6b35;
            --light-color: #f8f9fa;
            --dark-color: #212529;
            --gray-color: #6c757d;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --danger-color: #dc3545;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            line-height: 1.6;
            color: var(--dark-color);
            background-color: #fff;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 顶部导航栏样式 */
        header {
            background-color: white;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        
        .logo {
            display: flex;
            align-items: center;
        }
        
        .logo img {
            height: 40px;
            margin-right: 10px;
        }
        
        .logo-text {
            font-size: 24px;
            font-weight: 700;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        
        .nav-links {
            display: flex;
            list-style: none;
        }
        
        .nav-links li {
            margin-left: 30px;
        }
        
        .nav-links a {
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 600;
            font-size: 16px;
            transition: color 0.3s;
            padding: 5px 0;
            position: relative;
        }
        
        .nav-links a:hover {
            color: var(--primary-color);
        }
        
        .nav-links a.active {
            color: var(--primary-color);
        }
        
        .nav-links a.active:after {
            content: '';
            position: absolute;
            width: 100%;
            height: 3px;
            background-color: var(--primary-color);
            bottom: -5px;
            left: 0;
            border-radius: 2px;
        }
        
        .cta-button {
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            color: white;
            border: none;
            padding: 14px 25px;
            border-radius: 30px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
            box-shadow: 0 4px 12px rgba(44, 106, 229, 0.2);
        }
        
        .cta-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(44, 106, 229, 0.3);
        }
        
        .mobile-menu-btn {
            display: none;
            font-size: 24px;
            background: none;
            border: none;
            color: var(--dark-color);
            cursor: pointer;
        }
        
        /* 主内容区样式 */
        .hero {
            padding: 80px 0 60px;
            background: linear-gradient(135deg, #f5f7ff 0%, #f0f2ff 100%);
        }
        
        .hero-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        .hero-text {
            flex: 1;
            padding-right: 40px;
        }
        
        .hero-image {
            flex: 1;
            text-align: center;
        }
        
        .hero-image img {
            max-width: 60%;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }
        
        h1 {
            font-size: 42px;
            font-weight: 800;
            margin-bottom: 20px;
            line-height: 1.2;
            color: var(--dark-color);
        }
        
        .highlight {
            color: var(--primary-color);
        }
        
        .subtitle {
            font-size: 20px;
            color: var(--gray-color);
            margin-bottom: 30px;
        }
        
        .features {
            display: flex;
            flex-wrap: wrap;
            margin-top: 30px;
        }
        
        .feature {
            display: flex;
            align-items: center;
            margin-right: 30px;
            margin-bottom: 15px;
        }
        
        .feature-icon {
            width: 40px;
            height: 40px;
            background-color: rgba(44, 106, 229, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 10px;
            color: var(--primary-color);
        }
        
        /* 产品介绍部分 */
        .section {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-title h2 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 15px;
            color: var(--dark-color);
        }
        
        .section-title p {
            font-size: 18px;
            color: var(--gray-color);
            max-width: 700px;
            margin: 0 auto;
        }
        
        /* 检测等级展示 */
        .package-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 30px;
            margin-bottom: 60px;
        }
        
        .package-card {
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            padding: 35px 30px;
            flex: 1;
            min-width: 250px;
            max-width: 350px;
            transition: transform 0.3s, box-shadow 0.3s;
            border-top: 5px solid var(--primary-color);
            position: relative;
            overflow: hidden;
        }
        
        .package-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
        }
        
        .package-card.premium {
            border-top-color: #ffc107;
        }
        
        .package-card.active {
            border-top-color: #28a745;
        }
        
        .package-card.standard {
            border-top-color: #17a2b8;
        }
        
        .package-card.other {
            border-top-color: #6c757d;
        }
        
        .package-header {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
        }
        
        .package-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
            font-size: 24px;
            color: white;
        }
        
        .premium .package-icon {
            background: linear-gradient(to right, #ffc107, #ff9800);
        }
        
        .active .package-icon {
            background: linear-gradient(to right, #28a745, #20c997);
        }
        
        .standard .package-icon {
            background: linear-gradient(to right, #17a2b8, #0dcaf0);
        }
        
        .other .package-icon {
            background: linear-gradient(to right, #6c757d, #adb5bd);
        }
        
        .package-title {
            font-size: 22px;
            font-weight: 700;
        }
        
        .package-subtitle {
            color: var(--gray-color);
            font-size: 14px;
        }
        
        .package-features {
            list-style: none;
            margin: 25px 0;
        }
        
        .package-features li {
            padding: 8px 0;
            border-bottom: 1px dashed #eee;
            display: flex;
            align-items: center;
        }
        
        .package-features li i {
            color: var(--primary-color);
            margin-right: 10px;
            font-size: 14px;
        }
        
        .package-tag {
            position: absolute;
            top: 0;
            right: 0;
            background-color: var(--accent-color);
            color: white;
            padding: 5px 15px;
            font-size: 12px;
            font-weight: 600;
            border-radius: 0 10px 0 10px;
        }
        
        /* 工作原理部分 */
        .process-container {
            display: flex;
            justify-content: center;
            align-items: center;
            margin-bottom: 60px;
        }
        
        .process-step {
            text-align: center;
            padding: 0 20px;
            position: relative;
            flex: 1;
            max-width: 250px;
        }
        
        .process-step:not(:last-child):after {
            content: '';
            position: absolute;
            top: 40px;
            right: -30px;
            width: 60px;
            height: 2px;
            background-color: #e9ecef;
        }
        
        .step-number {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background-color: rgba(44, 106, 229, 0.1);
            color: var(--primary-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 30px;
            font-weight: 700;
            margin: 0 auto 20px;
            border: 3px solid white;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
        }
        
        .step-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 10px;
        }
        
        /* 新增：适用场景样式 */
        .scenarios-section {
            padding: 80px 0;
            background-color: #f8f9ff;
        }
        
        .scenarios-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }
        
        .scenario-card {
            background-color: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            border-left: 4px solid var(--primary-color);
        }
        
        .scenario-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
        }
        
        .scenario-icon {
            width: 60px;
            height: 60px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            margin-bottom: 20px;
            color: white;
        }
        
        .scenario-1 .scenario-icon { background: linear-gradient(to right, #ff6b6b, #ff8e8e); }
        .scenario-2 .scenario-icon { background: linear-gradient(to right, #4ecdc4, #6de0d8); }
        .scenario-3 .scenario-icon { background: linear-gradient(to right, #45b7d1, #67d0e9); }
        .scenario-4 .scenario-icon { background: linear-gradient(to right, #96ceb4, #b1e0c8); }
        .scenario-5 .scenario-icon { background: linear-gradient(to right, #feca57, #ffd880); }
        .scenario-6 .scenario-icon { background: linear-gradient(to right, #ff9ff3, #ffbaf5); }
        
        .scenario-title {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 15px;
            color: var(--dark-color);
        }
        
        .scenario-desc {
            color: var(--gray-color);
            margin-bottom: 15px;
            line-height: 1.7;
        }
        
        .scenario-features {
            list-style: none;
            margin-top: 15px;
        }
        
        .scenario-features li {
            padding: 6px 0;
            border-bottom: 1px dashed #eee;
            display: flex;
            align-items: center;
        }
        
        .scenario-features li i {
            color: var(--primary-color);
            margin-right: 10px;
            font-size: 14px;
        }
        
        /* 为什么选择部分 */
        .why-choose-section {
            padding: 60px 0;
            background-color: white;
        }
        
        .why-choose-content {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            padding: 50px;
            border-radius: 15px;
            color: white;
            text-align: center;
        }
        
        .why-choose-content h3 {
            font-size: 32px;
            margin-bottom: 20px;
        }
        
        .why-choose-content p {
            font-size: 18px;
            margin-bottom: 30px;
            opacity: 0.9;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.8;
        }
        
        .comparison-container {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 30px;
        }
        
        .comparison-item {
            flex: 1;
            max-width: 400px;
            padding: 20px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 10px;
        }
        
        .comparison-item h4 {
            font-size: 20px;
            margin-bottom: 15px;
        }
        
        /* 优势特点部分 */
        .advantages {
            background-color: #f8f9ff;
            padding: 80px 0;
        }
        
        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .advantage-card {
            background-color: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s;
        }
        
        .advantage-card:hover {
            transform: translateY(-5px);
        }
        
        .advantage-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 24px;
            margin-bottom: 20px;
        }
        
        .advantage-title {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 15px;
        }
        
        /* CTA部分 */
        .cta-section {
            text-align: center;
            padding: 80px 0;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
        }
        
        .cta-section h2 {
            font-size: 36px;
            margin-bottom: 20px;
        }
        
        .cta-section p {
            font-size: 18px;
            margin-bottom: 30px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
            opacity: 0.9;
        }
        
        .cta-button.light {
            background: white;
            color: var(--primary-color);
        }
        
        /* 底部样式 */
        footer {
            background-color: var(--dark-color);
            color: #ddd;
            padding: 60px 0 30px;
        }
        
        .footer-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
        }
        
        .footer-column {
            flex: 1;
            min-width: 250px;
            margin-bottom: 30px;
            padding-right: 30px;
        }
        
        .footer-column h3 {
            color: white;
            font-size: 20px;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-column h3:after {
            content: '';
            position: absolute;
            width: 40px;
            height: 3px;
            background-color: var(--primary-color);
            bottom: 0;
            left: 0;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 12px;
        }
        
        .footer-links a {
            color: #aaa;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-links a:hover {
            color: white;
        }
        
        .contact-info {
            list-style: none;
        }
        
        .contact-info li {
            display: flex;
            align-items: flex-start;
            margin-bottom: 15px;
        }
        
        .contact-info i {
            color: var(--primary-color);
            margin-right: 10px;
            margin-top: 5px;
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            margin-top: 30px;
            border-top: 1px solid #444;
            color: #888;
            font-size: 14px;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .hero-content {
                flex-direction: column;
            }
            
            .hero-text {
                padding-right: 0;
                margin-bottom: 40px;
                text-align: center;
            }
            
            .features {
                justify-content: center;
            }
            
            .process-step:not(:last-child):after {
                display: none;
            }
            
            .process-container {
                flex-direction: column;
            }
            
            .process-step {
                margin-bottom: 40px;
            }
            
            .scenarios-container {
                grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            }
            
            .comparison-container {
                flex-direction: column;
                align-items: center;
            }
        }
        
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            h1 {
                font-size: 32px;
            }
            
            .section-title h2 {
                font-size: 28px;
            }
            
            .cta-button {
                padding: 12px 25px;
            }
            
            .scenarios-container {
                grid-template-columns: 1fr;
            }
            
            .why-choose-content {
                padding: 30px 20px;
            }
            
            .why-choose-content h3 {
                font-size: 26px;
            }
        }