<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<!-- <link rel="stylesheet" type="text/css" href="../less混合/css/03.css"> -->
<style>
#wrap>.sjx {
width: 0;
height: 0;
border-width: 40px;
border-style: dashed solid dashed dashed;
border-color: transparent transparent transparent red;
overflow: hidden;
}
</style>
</head>
<body>
<div id="wrap">
<div class="sjx"></div>
</div>
</body>
</html>运行的结果
