                        课程
                    
                        /前端开发
                        
                            /HTML/CSS
                        
                        /企业网站综合布局实战

在DW里面预览效果是正确的用浏览器看就不行了求解答！！

为了验证下是连接上了CSS试了下颜色

<!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=utf-8" />
<title>无标题文档</title>
<link href="/css/main.css" rel="stylesheet" type="text/css" />
</head>

<body>
<div class="top">
   <div class="top_content">
    <ul>
        <li>联系我们</li>
        <li>加入收藏</li>
        <li>设为首页</li>
    </ul>
   </div>
</div>
</body>
</html>

/* CSS Document */
*{margin:0px;
padding:0px;
font-size:12px;}

body{background-color:#999;}

.top {
   width: 100%;
   height: 27px;
   background: url(/images/top_bg.jpg) repeat-x;
   float:left;
}
.top_content {
   width: 1000px;
   margin: 0 auto;
   line-height: 27px;
}
.top_content li {

   list-style-image: url(/images/arrow.jpg);
   width: 70px;
   float:right
}