body {
            font-family: Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            margin: 0;
            padding: 0;
            background-color: #f4f4f4;
        }
        .container {
            max-width: 800px;
            margin: 20px auto;
            padding: 20px;
            background-color: #fff;
            box-shadow: 0 0 10px rgba(0,0,0,0.1);
            border-radius: 8px;
            overflow: hidden;
        }
        h2 {
            font-size: 1.8em;
            color: #34495e;
            margin-top: 30px;
        }
        p {
            margin: 15px 0;
            font-size: 1em;
        }
        ul, ol {
            margin: 15px 0;
            padding-left: 30px;
        }
        li {
            margin-bottom: 10px;
        }
        .tip {
            background-color: #e8f4f8;
            padding: 15px;
            border-left: 4px solid #3498db;
            margin: 20px 0;
            border-radius: 4px;
        }
        @media (max-width: 600px) {
            .container {
                padding: 15px;
            }
            h2 {
                font-size: 1.5em;
            }
        }