lovecoding
/
Web1020


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" media="screen and (min-width:500px)"  href="./css/a.css">
    <style>
        .box{
            width: 200px;
            height: 200px;
            background-color: red;
        }
        /* @media screen and (min-width:500px){
            .box{
                width: 400px;
                height: 400px;
            }
        } */
        /* @media screen and (max-width:500px) {
            .box{
                background-color: blue;
            }
        } */

        /* @media screen and (min-width:500px) and (max-width:800px){
            .box{
                background-color: blue;
            }
        } */

        /* 监听屏幕为横屏时 */
        /* @media screen and (orientation: landscape){
            .box{
                background-color: blue;
            }
        } */
        /* 监听屏幕为竖屏 */
        /* @media screen and (orientation: portrait){
            .box{
                background-color: blue;
            }
        } */
    </style>
</head>
<body>
    <div class="box"></div>
</body>
</html>