每次写设置元素css样式的位置好难确定
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>导航案例</title>
<style>
*{
margin:0;
padding:0;
}
a{
text-decoration:none;
color:#6c6c6c;
font-size:13px;
}
.q{
clear:both;
}
li{
list-style:none;
}
.header{
width:100%;
background-color:#f5f5f5;
}
.cont{
width:1200px;
margin: 0px auto;
line-height:40px;
}
.c_left{
height:40px;
float:left;
}
.c_right{
width:800px;
float:right;
}
.b{
display:inline-block;
width:70px;
height:40px;
text-align:center;
position:relative;
}
.c_left a{
margin-right:5px;
}
.cont a:hover{
color:#ff5000;
}
.b:hover{
background-color:#FFF;
}
.b ul{
border:1px solid #f5f5f5;
display:none;
border-top:none;
}
.b:hover ul{
display:block;
position:absolute;
width:70px;
}
.b ul li{
color:#6c6c6c;
height:30px;
line-height:30px;
padding:0px 3px;
margin:5px 0px;
}
.b ul li:hover{
background-color:#ccc;
}
</style>
</head>
<body>
<div class="header">
<div class="cont">
<div class="c_left">
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</a>
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</div>
<div class="c_right">
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<ul>
<li>1</li>
<li>2</li>
</ul>
</a>
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<ul>
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</ul>
</a>
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<a href="#" class="b">卖家中心 <span>v</span>
<ul>
<li>1</li>
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</ul>
</a>
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<ul>
<li>1</li>
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<li>3</li>
<li>4</li>
<li>5</li>
</ul>
</a>
</div>
<div class="q"></div>
</div>
</div>
</body>
</html>
