加粗的宽度正好等于父级，但是在qq浏览器里现实的时候有重叠
<!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">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style type="text/css">
body{background:#00FFFF;font-size:30px;color:#000000;margin:0;padding:0}/*将整体的标签设置背景颜色，字体大小，字体颜色，外边距0，内边距0*/
.top{width:100%;height:40px;margin:0;padding:0;background:#00CC66;text-align:center;}
.main{width:90%;background:#993333;margin:0;padding:0;position:
absolute;left：5%
top:40px;margin:0 auto;}
.left{width:20%;height:800px;background:#0066FF;position:absolute;left:0;top:0px;margin:0 ;padding:15px}
.right1{width:50%;height:800px;background:#0066FF;margin:0 0 0 20%;padding:15px}
.right2{width:30%;height:800px;background:#0066FF;position:absolute;right:0;top:0px;margin:0 ;padding:15px}
.foot{clear:both;width:100%;height:60px;background:#9966CC;text-align:center}
</style>
</head>
<body>
<div class="top">top:本宝宝很六，就问你6不6
</div>
<div class="main">
<div class="left">left， </div>
<div class="right1">right1，
</div>
<div class="right2">
<a>right2，
</a>
</div>
<div class="foot">foot，
</div>
</div>
</body>
</html>
青椒rose_02回答
-
荼酒
没明白
随时随地看视频慕课网APP
CSS3
Html/CSS