* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: #f5f7fa;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        header {
            background: linear-gradient(135deg, #1a3a5f 0%, #2c5a8a 100%);
            color: white;
            padding: 20px 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            font-size: 28px;
            font-weight: 700;
            display: flex;
            align-items: center;
        }
        
        .logo i {
            color: #ffcc00;
            margin-right: 10px;
        }
        
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin-left: 30px;
        }
        
        nav ul li a {
            color: white;
            text-decoration: none;
            font-weight: 600;
            font-size: 16px;
            transition: color 0.3s;
        }
        
        nav ul li a:hover {
            color: #ffcc00;
        }
        
        .page-section {
            background-color: white;
            margin: 30px auto;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            overflow: hidden;
            padding: 30px;
        }
        
        .page-header {
            text-align: center;
            margin-bottom: 30px;
            padding-bottom: 20px;
            border-bottom: 2px solid #eaeaea;
        }
        
        .page-header h1 {
            color: #1a3a5f;
            font-size: 32px;
            margin-bottom: 10px;
        }
        
        .page-header p {
            color: #666;
            font-size: 18px;
            max-width: 800px;
            margin: 0 auto;
        }
        
        .project-title {
            background-color: #1a3a5f;
            color: white;
            padding: 20px;
            border-radius: 8px 8px 0 0;
            margin-bottom: 25px;
        }
        
        .project-title h2 {
            font-size: 28px;
            text-align: center;
        }
        
        .project-title .subtitle {
            text-align: center;
            color: #ffcc00;
            font-weight: 600;
            margin-top: 5px;
            font-size: 18px;
        }
        
        .content-table {
            width: 100%;
            border-collapse: collapse;
            margin: 25px 0;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.05);
        }
        
        .content-table thead {
            background-color: #1a3a5f;
            color: white;
        }
        
        .content-table th, .content-table td {
            padding: 15px 20px;
            text-align: left;
            border: 1px solid #e0e0e0;
        }
        
        .content-table tbody tr:nth-child(even) {
            background-color: #f9f9f9;
        }
        
        .content-table tbody tr:hover {
            background-color: #f0f5ff;
        }
        
        .features-list {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 15px;
            margin: 25px 0;
        }
        
        .features-list li {
            background-color: #f0f5ff;
            padding: 15px;
            border-radius: 6px;
            border-left: 4px solid #1a3a5f;
        }
        
        .features-list li i {
            color: #1a3a5f;
            margin-right: 10px;
        }
        
        .image-container {
            text-align: center;
            margin: 30px 0;
        }
        
        .project-image {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .image-caption {
            margin-top: 10px;
            color: #666;
            font-style: italic;
            font-weight: 500;
        }
        
        .section-diagram {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            margin: 30px 0;
            background-color: #f9f9f9;
            padding: 25px;
            border-radius: 8px;
        }
        
        .diagram-image {
            flex: 1;
            min-width: 300px;
            margin-right: 30px;
        }
        
        .diagram-list {
            flex: 1;
            min-width: 300px;
        }
        
        .diagram-list ul {
            list-style: none;
        }
        
        .diagram-list li {
            padding: 12px 0;
            border-bottom: 1px dashed #ddd;
            font-size: 16px;
            color: #333;
        }
        
        .diagram-list li:last-child {
            border-bottom: none;
        }
        
        .highlight {
            color: #1a3a5f;
            font-weight: 700;
        }
        
        .project-divider {
            height: 4px;
            background: linear-gradient(to right, #1a3a5f, #ffcc00, #1a3a5f);
            margin: 40px 0;
            border-radius: 2px;
        }
        
        .material-tag {
            display: inline-block;
            background-color: #e8f1ff;
            color: #1a3a5f;
            padding: 6px 12px;
            border-radius: 20px;
            margin: 5px;
            font-size: 14px;
            font-weight: 600;
        }
        
        footer {
            background-color: #1a3a5f;
            color: white;
            padding: 40px 0;
            text-align: center;
            margin-top: 50px;
        }
        
        .footer-content {
            display: flex;
            flex-direction: column;
            align-items: center;
        }
        
        .footer-logo {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 20px;
        }
        
        .footer-logo i {
            color: #ffcc00;
            margin-right: 10px;
        }
        
        .copyright {
            margin-top: 20px;
            color: #ccc;
            font-size: 14px;
        }
        
        .scroll-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background-color: #1a3a5f;
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
            transition: all 0.3s;
            z-index: 999;
            display: none;
        }
        
        .scroll-top:hover {
            background-color: #ffcc00;
            transform: translateY(-5px);
        }
        
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                text-align: center;
            }
            
            nav ul {
                margin-top: 20px;
                justify-content: center;
            }
            
            nav ul li {
                margin: 0 10px;
            }
            
            .page-section {
                padding: 20px 15px;
            }
            
            .features-list {
                grid-template-columns: 1fr;
            }
            
            .section-diagram {
                flex-direction: column;
            }
            
            .diagram-image {
                margin-right: 0;
                margin-bottom: 20px;
            }
            
            .material-tag {
                display: block;
                text-align: center;
            }
        }