<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>css3漸變色邊框</title>
<style type="text/css">
.wrap {
width: 400px;
height: 400px;
background-image:radial-gradient(blue,white);
padding:1px;
}
.inner {
background-color: rgba(255,255,255,1);
width: 400px;
height: 400px;
}
</style>
</head>
<body>
<div id="" class="wrap">
<div id="" class="inner" >
</div>
</div>
</body>
</html>
