* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: #f8f8f8;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        
        /* 导航菜单 */
        .main-nav {
            background: linear-gradient(to right, #800000, #a00000);
            padding: 15px 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }
        
        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: center;
        }
        
        .nav-links {
            display: flex;
            list-style: none;
            gap: 10px;
            flex-wrap: wrap;
            justify-content: center;
        }
        
        .nav-links a {
            color: white;
            text-decoration: none;
            padding: 10px 20px;
            border-radius: 5px;
            transition: background 0.3s ease;
            font-weight: 500;
        }
        
        .nav-links a:hover {
            background: rgba(255, 255, 255, 0.2);
        }
        
        /* 内容区域 */
        .content-section {
            background: white;
            padding: 30px;
            margin-bottom: 30px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            border-left: 5px solid #a00000;
        }
        
        h2 {
            color: #a00000;
            margin: 0 0 20px 0;
            font-size: 1.8rem;
            padding-bottom: 10px;
            border-bottom: 2px solid #e0e0e0;
        }
        
        h3 {
            color: #a00000;
            margin: 20px 0 15px;
            font-size: 1.4rem;
        }
        
        p {
            margin-bottom: 20px;
            font-size: 1.1rem;
            line-height: 1.7;
            color: #444;
        }
        
        /* 网格布局 */
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
            margin: 30px 0;
        }
        
        .benefit-card {
            background: #f9f9f9;
            padding: 25px;
            border-radius: 8px;
            border-top: 4px solid #a00000;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease;
        }
        
        .benefit-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 15px rgba(160, 0, 0, 0.1);
        }
        
        .benefit-card i {
            font-size: 2.5rem;
            color: #a00000;
            margin-bottom: 15px;
        }
        
        .types-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
            margin: 30px 0;
        }
        
        .type-card {
            background: #f9f9f9;
            padding: 25px;
            border-radius: 8px;
            border-left: 4px solid #a00000;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
        }
        
        /* 优势列表 */
        .advantages-list {
            list-style-type: none;
            margin: 25px 0;
        }
        
        .advantages-list li {
            margin-bottom: 15px;
            padding-left: 40px;
            position: relative;
            font-size: 1.1rem;
        }
        
        .advantages-list li:before {
            content: "✓";
            position: absolute;
            left: 0;
            color: #a00000;
            font-size: 1.8rem;
            font-weight: bold;
        }
        
        /* 选择指南 */
        .selection-guide {
            background: #f9f9f9;
            padding: 25px;
            border-radius: 8px;
            margin: 25px 0;
            border-left: 5px solid #a00000;
        }
        
        /* CTA区域 */
        .cta-section {
            background: linear-gradient(to right, #800000, #a00000);
            color: white;
            padding: 40px;
            text-align: center;
            border-radius: 8px;
            margin: 50px 0 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .cta-section h2 {
            color: white;
            border: none;
            margin-bottom: 20px;
        }
        
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-top: 30px;
            flex-wrap: wrap;
        }
        
        .cta-button {
            background: white;
            color: #a00000;
            padding: 15px 30px;
            text-decoration: none;
            border-radius: 5px;
            font-weight: bold;
            font-size: 1.1rem;
            transition: all 0.3s ease;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .cta-button:hover {
            background: #f0f0f0;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .benefits-grid, .types-grid {
                grid-template-columns: 1fr;
            }
            
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            
            .cta-button {
                width: 100%;
                text-align: center;
                justify-content: center;
            }
            
            .nav-links {
                flex-direction: column;
                align-items: center;
            }
            
            .nav-links a {
                width: 100%;
                text-align: center;
            }
            
            .content-section {
                padding: 20px;
            }
        }