摘要：下拉菜单需要放在有父级的地方，二级菜单以父级为定位，鼠标经过显示，不经过不显示，css要弄好二级菜单跟哪个父级，鼠标经过显示那个子集<!DOCTYPE html><html> <head> <meta charset="utf-8" /> <title>小米商城</title> <link hr
下拉菜单需要放在有父级的地方，二级菜单以父级为定位，鼠标经过显示，不经过不显示，css要弄好二级菜单跟哪个父级，鼠标经过显示那个子集
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>小米商城</title>
<link href="css/index.css" rel="stylesheet" type="text/css" />
<link href="css/commend.css" rel="stylesheet" type="text/css" />
<link href="css/font-awesome-4.7.0/css/font-awesome.min.css" rel="stylesheet" />
</head>
<body>
<div class="header">
<div class="header_nav">
<ul>
<li><a href="#">小米商城</a></li>
<li><a href="#">MIUI</a></li>
<li><a href="#">loT</a></li>
<li><a href="#">云服务</a></li>
<li><a href="#">金融</a></li>
<li><a href="#">优品</a></li>
<li><a href="#">小爱开放平台</a></li>
<li><a href="#">政企服务</a></li>
<li><a href="#">下载app</a></li>
<li><a href="#">Select Region</a></li>
<li></li>
<li><a href="#">登录</a></li>
<li><a href="#">注册</a></li>
<li><a href="#">消息通知</a></li>
<li><a href="#">
<i class="fa fa-cart-arrow-down"></i>
购物车（0）
</a>
<div class="hader_cart">
<div>购物车中还没有商品，赶紧选购吧！</div>
</div>
</li>
</ul>
</div>
</div>
</body>
</html>
css:
a { text-decoration: none; color: #B0B0B0; background: none }
.header{
width: 100%;
height: auto;
}
.header_nav{
width: 100%;
background: #333333;
height: auto;
}
ul{
width: 1200px;
height: 40px;
margin: 0 auto !important;
display: flex;
align-items: center;
}
ul li{
height: 20px;
float: left;
line-height: 20px;
font-size: 12px;
text-align: center;
border-right:1px solid #424242 ;
}
a:hover{
color: white;
}
ul li:nth-child(1){
width: 60px;
}
ul li:nth-child(2){
width: 40px;
}
ul li:nth-child(3){
width: 40px;
}
ul li:nth-child(4){
width: 45px;
}
ul li:nth-child(5){
width: 40px;
}
ul li:nth-child(6){
width: 40px;
}
ul li:nth-child(7){
width: 100px;
}
ul li:nth-child(8){
width: 80px;
}
ul li:nth-child(9){
width: 80px;
}
ul li:nth-child(10){
width: 100px;
}
ul li:nth-child(11){
width: 270px;
}
ul li:nth-child(12){
width: 43px;
}
ul li:nth-child(13){
width: 43px;
}
ul li:nth-child(14){
width: 70px;
}
ul li:nth-child(15){
width: 130px;
height: 30px;
line-height: 30px;
position: relative;
}
ul li:nth-child(15):hover .hader_cart{
display: block;
height: 100px;
}
.hader_cart{
position: absolute;
width: 320px;
height: 0px;
top: 36px;
left: -190px;
text-align: center;
font-size: 14px;
line-height: 100px;
display: none;
box-shadow: 1px 1px 5px 2px #E0E0E0;
}
批改老师：天蓬老师批改时间：2018-12-03 13:48:14
老师总结：下拉菜单的实现方式,有很多种,定位是一种, 可以再想想,是不是还有其它方法
