n久之前代码存档。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>商城导航条（css版）</title>
<style>
.topmenu{
display: block;
width: 220px;
border: 2px solid #e4393c;
margin: 0;
padding: 0;
}
.toptitle{
height: 40px;
line-height: 40px;
text-align: left;
font-size: 11pt;
font-weight: bold;
color: white;
background:#e4393c;
padding-left: 20px;;
}
.topmenu li{
height: 30px;
line-height: 30px;
font-size: 11pt;
list-style-type: none;
text-align: left;
padding-left: 8px;
z-index: 3;
background-image: url("1.png");
background-repeat: no-repeat;
background-position: right;
}
.topmenu li a{
text-decoration: none;
color: #313131;
}
.topmenu li a:hover{
text-decoration: underline;
font-weight: bold;
color: #e4393c;
}
.topmenu li:hover{
border: 1px solid #ddd;
border-right: 0;
box-shadow: 0 0 8px #ddd;
-moz-box-shadow: 0 0 8px #ddd;
-webkit-box-shadow: 0 0 8px #ddd;
background-image: none;
}
/*二级菜单*/
.submenu{
display: none;
width:715px;
left: 220px;
position: absolute;
top: 40px;
border: 1px solid #ddd;
z-index: 4;
background-color: #fff;
box-shadow: 0 0 8px #ddd;
-moz-box-shadow: 0 0 8px #ddd;
-webkit-box-shadow: 0 0 8px #ddd;
background-image: none;
}
.leftdiv{
float: left;
width:490px;
margin: 5px;;
}
.leftdiv dl{
display: block;
border-bottom: solid 1px #eee;
padding-bottom: 6px;
overflow: hidden;
}
.leftdiv dl dt{
display: block;
float: left;
width: 60px;
height:22px;
line-height: 22px;;
text-align: right;
padding-right: 6px;;
}
.leftdiv dl dt a{
color: #e4393c;
font-weight: bold;
text-decoration: underline;
font-size: 10pt;
}
.leftdiv dl dd{
display: block;
overflow: hidden;
}
.leftdiv dl dd a{
display: block;
float: left;
border-left: 1px solid #ccc;
color: #737373;
font-size:9pt;
height:14px;
line-height: 14px;
margin:4px 0;
padding: 0 4px;
}
.rightdiv{
float: left;
width: 200px;
margin: 5px;;
}
.rightdiv dl dd{
margin:3px 0;
}
.rightdiv dl dt{
color: #e4393c;
font-weight: bold;
font-size: 10pt;
}
.rightdiv dl dd a{
font-size: 9pt;
color: #737373;
line-height: 22px;
}
.rightdiv dl dd a:hover{
color: #737373;
font-weight: normal;
}
/*鼠标移入 二级菜单显示*/
.topmenu li:hover span{ /*每一行白色开口*/
background: #fff;
display: inline-block;
z-index: 20;
width:20px;
height:30px;
float: right;
position: relative;
}
.topmenu li:hover .submenu{
display: block;
}
</style>
</head>
<body>
<ul class="topmenu">
<div class="toptitle">全部商品分类</div>
<li>
<a href="#">图书、音像、数码商品</a><span> </span>
<div class="submenu">
<div class="leftdiv">
<dl>
<dt><a href="#">电子书</a></dt>
<dd>
<a href="#">免费</a>
<a href="#">小说</a>
<a href="#">励志与成功</a>
</dd>
</dl>
<dl>
<dt><a href="#">数字音乐</a></dt>
<dd>
<a href="#">通俗流行</a>
<a href="#">古典音乐</a>
<a href="#">摇滚说唱</a>
<a href="#">爵士蓝调</a>
<a href="#">乡村民谣</a>
<a href="#">有声读物</a>
</dd>
</dl>
<dl>
<dt><a href="#">音像</a></dt>
<dd>
<a href="#">音乐</a>
<a href="#">影院</a>
<a href="#">教育音像</a>
<a href="#">游戏</a>
</dd>
</dl>
<dl>
<dt><a href="#">文艺</a></dt>
<dd>
<a href="#">小说</a>
<a href="#">文学</a>
<a href="#">青春文学</a>
<a href="#">传记</a>
<a href="#">艺术</a>
</dd>
</dl>
<dl>
<dt><a href="#">人文社科</a></dt>
<dd>
<a href="#">历史</a>
<a href="#">心理学</a>
<a href="#">政治军事</a>
<a href="#">国学古籍</a>
<a href="#">哲学宗教</a>
<a href="#">社会科学</a>
</dd>
</dl>
<dl>
<dt><a href="#">经营励志</a></dt>
<dd>
<a href="#">经济</a>
<a href="#">金融与投资</a>
<a href="#">管理</a>
<a href="#">励志与成功</a>
</dl>
<dl>
<dt><a href="#">生活</a></dt>
<dd>
<a href="#">家庭与育儿</a>
<a href="#">装修地图</a>
<a href="#">烹饪美食</a>
<a href="#">时尚美妆</a>
<a href="#">家具</a>
<a href="#">婚恋与两性</a>
<a href="#">娱乐绯闻</a>
<a href="#">健身与健康</a>
<a href="#">动漫幽默</a>
<a href="#">体育运动</a>
</dd>
</dl>
<dl>
<dt><a href="#">科技</a></dt>
<dd>
<a href="#">科普</a>
<a href="#">IT</a>
<a href="#">建筑</a>
<a href="#">工业技术</a>
<a href="#">电子通信</a>
<a href="#">家教</a>
<a href="#">科学与自然</a>
</dd>
</dl>
<dl>
<dt><a href="#">少儿</a></dt>
<dd>
<a href="#">少儿</a>
<a href="#">0-3岁</a>
<a href="#">3-6岁</a>
<a href="#">7-10岁</a>
<a href="#">11-14岁</a>
</dd>
</dl>
<dl>
<dt><a href="#">教育</a></dt>
<dd>
<a href="#">教材</a>
<a href="#">中小学教辅</a>
<a href="#">考试</a>
<a href="#">外语学习</a>
</dd>
</dl>
<dl>
<dt><a href="#">其它</a></dt>
<dd>
<a href="#">英文原版书</a>
<a href="#">港台图书</a>
<a href="#">工具书</a>
<a href="#">套装书</a>
<a href="#">杂志周刊</a>
</dd>
</dl>
</div>
<div class="rightdiv">
<dl>
<dd style="width: 100%;height:60px;border: solid 1px #ddd;">图片一</dd>
<dd style="width: 100%;height:60px;border: solid 1px #ddd;">图片二</dd>
</dl>
<dl>
<dt>推荐品牌</dt>
<dd>
<a href="#">美的官方旗舰店</a>
</dd>
<dd>
<a href="#">美的官方旗舰店</a>
</dd>
<dd>
<a href="#">美的官方旗舰店</a>
</dd>
<dd>
<a href="#">美的官方旗舰店</a>
</dd>
<dd>
<a href="#">美的官方旗舰店</a>
</dd>
</dl>
</div>
</div>
</li>
<li><a href="#">家用电器</a></li>
<li><a href="#">手机、数码</a></li>
<li><a href="#">电脑、办公</a></li>
<li><a href="#">家居、家具、家装、厨具</a></li>
<li><a href="#">服饰内衣、珠宝首饰</a></li>
<li><a href="#">个护化妆</a></li>
<li><a href="#">鞋靴、箱包、钟表、奢饰品</a></li>
<li><a href="#">运动户外</a></li>
<li><a href="#">母婴、玩具乐器</a></li>
<li><a href="#">食品饮料、酒类、生鲜</a></li>
<li><a href="#">营养保健</a></li>
</ul>
</body>
</html>
图片 1.png: 
效果：
