我这个代码对吗？ 请大神们帮忙看下谢啦
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>混合布局编程挑战</title>
<style type="text/css">
body{ margin:0; padding:0; font-size:30px; color:#fff}
.top{width:100%;height:200px;background:gray;}
.main{width:100%;height:800px;background:red;}
.left{ width:200px;height:800px;float:left;background:blue;}
.right{width:100%;height:800px;background:green;position:absolute;left:210px;top:200;}
.foot{width:100%;height:200px;background:orange;}
</style>
</head>
<body>
<div class="top">top</div>
<div class="main">
<div class="right">right</div>
<div class="left">left</div>
</div>
<div class="foot">foot</div>
</body>
</html>
