* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: Arial, Verdana, Helvetica, sans-serif;
            line-height: 1.6;
            color: #000;
            background: linear-gradient(to bottom, #87CEEB 0%, #ffffff 300px);
            margin: 0;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        header {
            background: linear-gradient(135deg, #4A90E2 0%, #87CEEB 100%);
            padding: 20px 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        
        .logo {
            font-size: 28px;
            font-weight: bold;
            color: white;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }
        
        .current-time {
            color: white;
            font-size: 14px;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
        }
        
        nav {
            background: #fff;
            padding: 15px 0;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        
        .nav-links {
            display: flex;
            list-style: none;
            justify-content: center;
            flex-wrap: wrap;
            gap: 30px;
        }
        
        .nav-links a {
            text-decoration: none;
            color: #4A90E2;
            font-weight: bold;
            padding: 8px 16px;
            border-radius: 5px;
            transition: all 0.3s ease;
        }
        
        .nav-links a:hover {
            background: #4A90E2;
            color: white;
        }
        
        main {
            padding: 40px 0;
        }
        
        h1 {
            font-size: 36px;
            color: #2c3e50;
            text-align: center;
            margin-bottom: 40px;
            text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
        }
        
        article {
            background: white;
            padding: 40px;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            margin-bottom: 40px;
            line-height: 1.8;
        }
        
        article h2, article h3, article h4 {
            color: #2c3e50;
            margin-bottom: 20px;
            margin-top: 30px;
        }
        
        article h2 {
            font-size: 28px;
            border-bottom: 3px solid #4A90E2;
            padding-bottom: 10px;
        }
        
        article h3 {
            font-size: 22px;
            color: #4A90E2;
        }
        
        article h4 {
            font-size: 18px;
        }
        
        article p {
            margin-bottom: 20px;
            color: #333;
            font-size: 16px;
        }
        
        article strong {
            color: #2c3e50;
        }
        
        article a {
            color: #4A90E2;
            text-decoration: underline;
        }
        
        article a:hover {
            color: #2c3e50;
            text-decoration: none;
        }
        
        .transition-section {
            background: #f8f9fa;
            padding: 30px 40px;
            border-radius: 10px;
            margin-bottom: 40px;
            border-left: 5px solid #4A90E2;
        }
        
        .transition-section p {
            font-size: 16px;
            color: #333;
            line-height: 1.8;
            margin-bottom: 15px;
        }
        
        .links-section {
            background: white;
            padding: 40px;
            border-radius: 10px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        }
        
        .links-section h3 {
            color: #2c3e50;
            font-size: 24px;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid #4A90E2;
        }
        
        .links-section ul {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 15px;
            margin-bottom: 30px;
        }
        
        .links-section li {
            padding: 12px 0;
            border-bottom: 1px solid #eee;
        }
        
        .links-section a {
            color: #4A90E2;
            text-decoration: none;
            font-size: 16px;
            transition: color 0.3s ease;
            display: block;
        }
        
        .links-section a:hover {
            color: #2c3e50;
            padding-left: 10px;
            transition: all 0.3s ease;
        }
        
        footer {
            background: #2c3e50;
            color: white;
            padding: 30px 0;
            margin-top: 60px;
        }
        
        .footer-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }
        
        .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        
        .footer-links a {
            color: #bdc3c7;
            text-decoration: none;
            font-size: 14px;
        }
        
        .footer-links a:hover {
            color: white;
            text-decoration: underline;
        }
        
        .copyright {
            font-size: 12px;
            color: #bdc3c7;
        }
        
        @media (max-width: 768px) {
            .container {
                padding: 0 15px;
            }
            
            .header-content {
                flex-direction: column;
                gap: 15px;
            }
            
            .nav-links {
                flex-direction: column;
                gap: 15px;
                align-items: center;
            }
            
            h1 {
                font-size: 28px;
            }
            
            article, .transition-section, .links-section {
                padding: 25px;
            }
            
            .footer-content {
                flex-direction: column;
                text-align: center;
            }
            
            .footer-links {
                justify-content: center;
            }
            
            .links-section ul {
                grid-template-columns: 1fr;
            }
        }
        
        @media (max-width: 480px) {
            h1 {
                font-size: 24px;
            }
            
            article, .transition-section, .links-section {
                padding: 20px;
            }
            
            .logo {
                font-size: 22px;
            }
        }