为什么显示不出来 代码如下
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
<title></title>
<link rel="stylesheet" type="text/css" href="css/reset.css">
<link rel="stylesheet" type="text/css" href="css/main.css">
</head>
<body>
<div class="public-header">
<div class="public-centered clearfloat">
<div class="header-logo"><a href=""></a></div>
<div class="header-nav"></div>
</div>
</div>
<div class="index-banner"></div>
<div class="public-centered index-list"></div>
<div class="public-centered index-panel"></div>
<div class="public-centered index-foot"></div>
<div>
.public-header
{
height: 110px;
}
.public-header .header-logo
{
float: left;
width: 182px;
height: 54px;
background:url("../images/logo.png");
}
为什么显示不出来啊