* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            line-height: 1.6;
            color: #333;
            background-color: #f9f9f9;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        header {
            background-color: #2c3e50;
            color: white;
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-radius: 0 0 8px 8px;
        }
        
        .container {
            width: 100%;
            padding: 0 15px;
        }
        
        h1 {
            text-align: center;
            margin-bottom: 0.5rem;
            font-size: 2.2rem;
        }
        
        .tagline {
            text-align: center;
            font-weight: 300;
            opacity: 0.9;
            font-size: 1.1rem;
        }
        
        nav {
            background-color: #34495e;
            padding: 0.8rem;
            border-radius: 4px;
            margin-top: 1.5rem;
        }
        
        nav ul {
            display: flex;
            justify-content: center;
            list-style: none;
            flex-wrap: wrap;
        }
        
        nav li {
            margin: 0 1rem;
        }
        
        nav a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            padding: 0.5rem 0;
            display: block;
        }
        
        nav a:hover {
            color: #3498db;
        }
        
        main {
            display: flex;
            flex-direction: column;
            gap: 2rem;
            margin-bottom: 3rem;
        }
        
        section {
            background-color: white;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
        }
        
        h2 {
            color: #2c3e50;
            margin-bottom: 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #3498db;
        }
        
        h3 {
            color: #2c3e50;
            margin: 1.5rem 0 1rem;
        }
        
        p {
            margin-bottom: 1rem;
            text-align: justify;
        }
        
        .benefits-list, .countries-list, .faq-list {
            margin-left: 1.5rem;
            margin-bottom: 1.5rem;
        }
        
        .benefits-list li, .countries-list li, .faq-list li {
            margin-bottom: 0.8rem;
        }
        
        .keyword {
            font-weight: bold;
            color: #2980b9;
        }
        
        .hot-topics {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
            margin-top: 2rem;
        }
        
        .topic-btn {
            flex: 1;
            min-width: 200px;
            max-width: 250px;
            background-color: #3498db;
            color: white;
            border: none;
            padding: 1rem 1.5rem;
            border-radius: 6px;
            font-weight: 600;
            text-align: center;
            text-decoration: none;
            transition: background-color 0.3s, transform 0.2s;
        }
        
        .topic-btn:hover {
            background-color: #2980b9;
            transform: translateY(-3px);
        }
        
        footer {
            background-color: #2c3e50;
            color: white;
            padding: 2rem 0;
            text-align: center;
            border-radius: 8px 8px 0 0;
            margin-top: 3rem;
        }
        
        .footer-info {
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            margin-bottom: 1.5rem;
        }
        
        .footer-section {
            flex: 1;
            min-width: 250px;
            padding: 0 1rem;
            margin-bottom: 1.5rem;
        }
        
        .footer-section h3 {
            color: #ecf0f1;
            border-bottom: 1px solid #4a6572;
            padding-bottom: 0.5rem;
            margin-bottom: 1rem;
        }
        
        .copyright {
            padding-top: 1.5rem;
            border-top: 1px solid #4a6572;
            opacity: 0.8;
        }
        
        @media (max-width: 768px) {
            nav ul {
                flex-direction: column;
                align-items: center;
            }
            
            nav li {
                margin: 0.3rem 0;
            }
            
            .hot-topics {
                flex-direction: column;
                align-items: center;
            }
            
            .topic-btn {
                width: 100%;
                max-width: 300px;
            }
        }