lovecoding
/
W260426


			
				
					
						
						
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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>
    <style>
        /* css reset 重置样式 */
        *{
            margin: 0;
            padding: 0;
        }
        .box{
            /* width: 100%; */
            height: 200px;

            /* vw vh 单位 */
            /* vw viewport width 取值1-100 表示视口宽度的1% 1vw = 1% */
            width:100vw;
            /* vh viewport height 取值1-100 表示视口高度的1%  1vh = 1% */
            height: 100vh;
            background-color: red;
        }
    </style>
</head>
<body>
    <div class="box">
        
    </div>
</body>
</html>