差一个引号的崩溃

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
.header,.main,.footer{
width:500px;

}
.header,.footer{
height: 100px;
background: #000;
}

</style>
</head>
<body>
<div class="header"></div>
<div class="main></div>

<div class="footer"></div>

</body>
</html>

posted on 2017-11-21 23:24 IT猩阅读(103) 评论(0) 编辑收藏举报