lovecoding
/
W250913


			
				
					
						
						
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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>
    <!-- 响应式布局  根据屏幕尺寸 来加载不同的css文件 -->
    <link rel="stylesheet" media="screen and (max-width:1000px) and (min-width:600px)" href="./css/a.css">
    <link rel="stylesheet" media="screen and (min-width:1200px)" href="./css/b.css">
    <style>
        .box{
            width: 1000px;
            height: 600px;
            background-color: red;
        }
        /* @media 媒体查询 根据屏幕类型和尺寸 来控制样式 */
        @media screen and (max-width:1000px) and (min-width:600px){
            .box{
                background-color: blue;
            }

        }
        @media screen and (min-width:1200px){
            .box{
                background-color: green;
            }
        }
        /* @media 媒体查询 orientation 根据屏幕方向 来控制样式 landscape 横屏 */
        @media screen and (orientation:landscape){
            .box{
                background-color: pink;
            }
        }
        /* 竖屏  */
        @media screen and (orientation:portrait){
            .box{
                background-color: yellow;
            }
        }
    </style>
</head>
<body>
    <div class="box">hello world</div>
</body>
</html>