<html>
<head>
<title></title>
<style type="text/css">
*{
padding: 0;
margin: 0;
}
.box{
position: relative;
width: 100px;
height: 100px;
background: #f00;
}
.box:after{
position: absolute;
left: 0;
bottom: 0;
content: ‘‘;
width: 0;
height: 0;
border-left: 50px solid transparent;
border-right: 50px solid transparent;
border-bottom: 10px solid #fff;
}
</style>
</head>
<body>
<div class="box"></div>
</body>
</html>
时间： 2024-11-01 05:29:46