版权声明：JiahaoZhang原创文章，转载请注明出处 https://blog.csdn.net/GrootBaby/article/details/81938333
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>border</title>
<style type="text/css">
.box{
width: 100px;
height: 100px;
border:10px solid #ddd;
border-image: -webkit-linear-gradient(#ddd, #000) 30 30;
border-image: -moz-linear-gradient(#ddd, #000) 30 30;
border-image: -o-linear-gradient(#ddd, #000) 30 30;
border-image: linear-gradient(#ddd, #000) 30 30;
}
</style>
</head>
<body>
<div class="box"></div>
</body>
</html>显示效果如下图：
