HTML中border属性设置（CSS边框样式)20190715
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>CSS边框样式</title>
<!-- <link rel="shortcut icon" type="image/x-icon" href="images/favicon.ico"> -->
<style type="text/css">
.box{width:100px;height:100px;border:1px solid #ccc;margin-bottom:20px;}
.box1{width:100px;height:100px;border:1px double lightcoral;margin:20px 0px;border-radius:20px;}
.box2{width:100px;height:100px;border:1px dashed lightblue;margin:20px 0px;border-radius:50px;}
.box3{width:100px;height:100px;border:1px dotted lightgreen;margin:10px 0px;box-shadow:10px 5px 3px #cfcfcf;}
.box4{width:100px;height:100px;margin:10px 0px;margin:20px 0px;box-shadow:0px 6px 40px #cfcfcf inset;}
button{border:none;}
</style>
</head>
<body>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<button>登录</button>
</body>
</html>
