lovecoding
/
Web1020


			
				
					
						
						
							1234567891011121314151617181920
							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{
            /* width: 400px; */
            max-width: 400px;
            min-width: 200px;
            height: 400px;
            background-color: red;
        }
    </style>
</head>
<body>
    <div class="box"></div>
</body>
</html>