求助 为啥设置完overflow hidden之后mainbody 没有变化
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>腾讯软件中心</title>
<style type="text/css">
*{margin:0;padding:0;}
#wrap{background:#F7FB80;margin:0 auto;width:960px;}
#header{background:#B42426;width:100%;}
#main body{background:#FCO;width:100%;overflow:hidden;}
#footer{background:#02F434;width:100%;}
.left{width:800px;height:200px;background:#0EC5F4;float:left;}
.right{width:140px;height:500px;background:#C2C2C2;float:left;}
</style>
</head>
<body>
<div id="wrap">
<div id="header">头部</div>
<div id="main body">
<div class="left">1</div>
<div class="right">2</div>
3</div>
<div id="footer">版权</div>
</div>
</body>
</html>
