* {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            font-family: 'Segoe UI', 'Arial', sans-serif;
        }
        
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }
        
        header {
            background: linear-gradient(135deg, #1a3a8f 0%, #2d5cc2 100%);
            color: white;
            padding: 30px 0;
            text-align: center;
            border-radius: 8px;
            margin-bottom: 30px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        
        h1 {
            font-size: 2.5rem;
            margin-bottom: 10px;
        }
        
        .subtitle {
            font-size: 1.2rem;
            opacity: 0.9;
        }
        
        .product-overview {
            background-color: white;
            padding: 25px;
            border-radius: 8px;
            margin-bottom: 30px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
            margin-top: 20px;
        }
        
        .feature-card {
            background-color: #f8f9fa;
            padding: 20px;
            border-radius: 8px;
            border-left: 4px solid #2d5cc2;
        }
        
        .config-section {
            background-color: white;
            padding: 25px;
            border-radius: 8px;
            margin-bottom: 30px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        }
        
        h2 {
            color: #1a3a8f;
            border-bottom: 2px solid #eaeaea;
            padding-bottom: 10px;
            margin-bottom: 20px;
        }
        
        h3 {
            color: #2d5cc2;
            margin: 20px 0 15px 0;
        }
        
        .config-group {
            margin-bottom: 25px;
        }
        
        .option-row {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 10px;
        }
        
        .option-item {
            flex: 1;
            min-width: 180px;
            padding: 15px;
            background-color: #f8f9fa;
            border-radius: 6px;
            border: 1px solid #e0e0e0;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .option-item:hover {
            border-color: #2d5cc2;
            box-shadow: 0 4px 8px rgba(45, 92, 194, 0.1);
        }
        
        .option-item.selected {
            border-color: #2d5cc2;
            background-color: #eef2ff;
            box-shadow: 0 4px 8px rgba(45, 92, 194, 0.15);
        }
        
        .option-item.disabled {
            opacity: 0.5;
            pointer-events: none;
            background-color: #f5f5f5;
        }
        
        .option-title {
            font-weight: bold;
            margin-bottom: 8px;
            color: #1a3a8f;
        }
        
        .option-desc {
            font-size: 0.9rem;
            color: #666;
        }
        
        .radio-group {
            display: flex;
            gap: 20px;
            margin-top: 10px;
        }
        
        .radio-option {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .result-section {
            background-color: white;
            padding: 25px;
            border-radius: 8px;
            margin-bottom: 30px;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
        }
        
        .final-model {
            background-color: #1a3a8f;
            color: white;
            padding: 20px;
            border-radius: 6px;
            text-align: center;
            font-size: 1.8rem;
            font-weight: bold;
            margin: 20px 0;
            letter-spacing: 1px;
        }
        
        .spec-summary {
            background-color: #f8f9fa;
            padding: 20px;
            border-radius: 6px;
            margin-top: 20px;
        }
        
        .spec-item {
            display: flex;
            justify-content: space-between;
            padding: 8px 0;
            border-bottom: 1px dashed #ddd;
        }
        
        .spec-item:last-child {
            border-bottom: none;
        }
        
        .note {
            background-color: #fff8e1;
            padding: 15px;
            border-radius: 6px;
            margin-top: 20px;
            border-left: 4px solid #ffc107;
        }
        
        .warning {
            background-color: #ffebee;
            padding: 15px;
            border-radius: 6px;
            margin-top: 15px;
            border-left: 4px solid #f44336;
            font-size: 0.9rem;
        }
        
        @media (max-width: 768px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            
            .option-row {
                flex-direction: column;
            }
            
            .option-item {
                min-width: 100%;
            }
            
            h1 {
                font-size: 2rem;
            }
        }