abstract：<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0">&
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>三级下拉菜单</title>
<!-- <link rel="stylesheet" type="text/css" href="/css/lianxi.css"> -->
<script type="text/javascript" src="../zuoye/jquery-3.3.1.min.js"></script>
<link rel="stylesheet" href="font-awesome-4.7.0/css/font-awesome.css">
</head>
<style>
*{margin: 0; padding: 0;}
li{list-style:none;}
body{background: #333;}
.nav{height:60px;width:1200px; margin: 0 auto;background:#1B2519;}
.one{padding:0 40px;}
li{height:60px; width:180px;line-height:60px;color: #fff; float: left; font-weight:bold; text-align: center;cursor: pointer; font-size:25px;}
.one>li:hover{background:#fff;color: #1B2519;}
.twobox>li{height:40px; width:180px; background:#fff;color: #1B2519;line-height:40px;font-size:18px;position: relative; }
.twobox>li:hover{background:#ff6500;color: #fff;}
.three{position:absolute;top:0; left: 180px;}
.three>li{font-size:15px; background:#ff6500;color: #fff;width:100px; height:40px;line-height: 40px;}
.three>li:hover{background: #1B2519;}
</style>
<body>
<div class="nav">
<ul class="one">
<li><i class=" fa fa-user-circle" aria-hidden="true"></i> 阿玛准</li>
<li> <i class=" fa fa-american-sign-language-interpreting"></i> 设计
<ul class="twobox">
<li >logo设计</li>
<li class="two">海报设计
<ul class="three">
<li>藏式海报</li>
<li>韩式海报</li>
<li>日风海报</li>
</ul>
</li>
<li>头像设计</li>
</ul>
</li>
<li>产品</li>
<li>文化
<ul class="twobox">
<li >企业文化</li>
<li>设计文化</li>
<li class="two">藏式理念
<ul class="three">
<li>设计理念</li>
<li>经营理念</li>
<li>人性理念</li>
<li>公司理念</li>
<li>道德理念</li>
</ul>
</li>
</ul>
</li>
<li>联系我们 <i class="fa fa-volume-control-phone" ></i></li>
</ul>
</div>
</body>
</html>
<script>
$(function(){
$('.twobox').hide();
$('.three').hide();
$('.one>li').mouseover(function(){
$(this).find('.twobox').slideDown(500);
})
$('.one>li').mouseleave(function(){
$(this).find('.twobox').slideUp(500);
})
$('.two').mouseover(function(){
$('.three').slideDown(300);
})
$('.two').mouseleave(function(){
$('.three').slideUp(500);
})
})
</script>
Correcting teacher：灭绝师太Correction time：2019-03-22 15:46:40
Teacher's summary：完成的不错,导航的做法和逻辑理解好以后就没有太大问题!