lovecoding
/
W260426


			
				
					
						
						
							1234567891011121314151617181920212223242526272829
							<!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: 200px;
            height: 200px;
            border: 1px solid #000;
            position: relative;
        }
        .item{
            background-color: red;
            position: absolute;
            top:0;
            left:0;
            right: 0;
            bottom: 0;
        }
    </style>
</head>
<body>
    <div class="box">
        <div class="item"></div>
    </div>
</body>
</html>