<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<title>Box Model</title>
<style type="text/css" media="screen">
body{
color:#FFF;text-align:center;
}
.box{width:200px;height:200px;background-color:#1E9FFF;margin:0px auto;padding:0px 0px;border-radius:10px;}
.box1{width:300px;height:300px;background-color:#FF5722;margin:0 auto;padding:0px 0px;border-radius:10px;}
.box2{width:350px;height:350px;background-color:#2F4056;margin:0 auto;padding:0px 0px;border-radius:10px;}
.box3{width:400px;height:400px;background-color:#5FB878;margin:0 auto;padding:0px 0px;border:2px solid #c2c2c2;box-shadow:5px 5px 5px gray;border-radius:10px;}
</style>
</head>
<body>
<div>
外边距
<div>
边框
<div>
内边距
<div>
内容
</div>
</div>
</div>
</div>
</body>
</html>
