今天就跟大家聊聊有關css中怎么實現一個三級下拉菜單，可能很多人都不太了解，為了讓大家更加了解，小編給大家總結了以下內容，希望大家根據這篇文章可以有所收獲。
<!DOCTYPE html>
<html>
<head>
<title>test</title>
<style type = "text/css">
/*設置通配符樣式*/
*{
margin:0;
padding:0;
}
body{
font-size:12px;
}
ul{
list-style:none;
}
a{
text-decoration:none;
}</p>
<p>/*設置二級導航樣式*/
.nav {
width:500px;
height:30px;
background-color:#b4b4b4;
/*導航欄居中*/
margin:auto;
}
.nav ul li {
width:100px;
height:30px;
float:left;
position:relative;
}
.nav ul li a {
display:block;
width:96px;
border:2px solid gray;
height:26px;
line-height:26px;
text-align:center;
}
.nav ul li a:hover {
background-color:yellow;
}</p>
<p>/*設置一級導航樣式*/
.nav ul li ul{
display:none;
}
.nav ul li:hover ul{
display:block;
width:100px;
position:absolute;
top:30px;
left:0;
background-color:white;
}
.nav ul li:hover ul li a{
display:block;
width:96px;
height:26px;
line-height:26px;
border:2px solid gray;
text-align:center;
}
.nav ul li:hover ul li a:hover{
background-color:orange;
}</p>
<p>/*設置三級導航樣式*/
.nav ul li:hover ul li ul {
display:none;
}
.nav ul li:hover ul li:hover ul{
display:block;
width:100px;
position:absolute;
top:0px;
left:100px;
background-color:#b4b4b4;
}
.nav ul li:hover ul li:hover ul li {
width:100px;
height:30px;
}
.nav ul li:hover ul li:hover ul li a {
display:block;
width:96px;
height:26px;
line-height:26px;
border:2px solid gray;
text-align:center;
}
.nav ul li:hover ul li:hover ul li a:hover {
background-color:#00CC00;
}
.nav ul li:hover ul .nav_jw ul {
display:none;
}
.nav ul li:hover ul .nav_jw:hover ul{
display:block;
width:100px;
position:absolute;
top:0px;
left:-100px;
background-color:#b4b4b4;
}
.nav ul li:hover ul .nav_jw:hover ul li {
width:100px;
height:30px;
}
.nav ul li:hover ul .nav_jw:hover ul li a {
display:block;
width:96px;
height:26px;
line-height:26px;
border:2px solid gray;
text-align:center;
}
.nav ul li:hover ul .nav_jw:hover ul li a:hover {
background-color:#00CC00;
}</p>
<p></style>
</head>
<body>
<div class = "nav">
<ul>
<li><a href = "#">一級導航</a>
<ul>
<li><a href = "#">二級導航</a>
<ul>
<li><a href = "#">三級導航</a></li>
<li><a href = "#">三級導航</a></li>
<li><a href = "#">三級導航</a></li>
</ul>
</li>
<li><a href = "#">二級導航</a>
<ul>
<li><a href = "#">三級導航</a></li>
<li><a href = "#">三級導航</a></li>
<li><a href = "#">三級導航</a></li>
</ul>
</li>
<li><a href = "#">二級導航</a>
<ul>
<li><a href = "#">三級導航</a></li>
<li><a href = "#">三級導航</a></li>
<li><a href = "#">三級導航</a></li>
</ul>
</li>
</ul>
</li>
<li><a href = "#">一級導航</a>
<ul>
<li><a href = "#">二級導航</a></li>
<li><a href = "#">二級導航</a></li>
<li><a href = "#">二級導航</a></li>
</ul>
</li>
<li><a href = "#">一級導航</a>
<ul>
<li><a href = "#">二級導航</a></li>
<li><a href = "#">二級導航</a></li>
<li><a href = "#">二級導航</a></li>
</ul>
</li>
<li><a href = "#">一級導航</a>
<ul>
<li><a href = "#">二級導航</a></li>
<li><a href = "#">二級導航</a></li>
<li><a href = "#">二級導航</a></li>
</ul>
</li>
<li><a href = "#">一級導航</a>
<ul>
<li class="nav_jw"><a href = "#">二級導航</a>
<ul>
<li><a href = "#">三級導航</a></li>
<li><a href = "#">三級導航</a></li>
<li><a href = "#">三級導航</a></li>
</ul>
</li>
<li class="nav_jw"><a href = "#">二級導航</a>
<ul>
<li><a href = "#">三級導航</a></li>
<li><a href = "#">三級導航</a></li>
<li><a href = "#">三級導航</a></li>
</ul>
</li>
<li class="nav_jw"><a href = "#">二級導航</a>
<ul>
<li><a href = "#">三級導航</a></li>
<li><a href = "#">三級導航</a></li>
<li><a href = "#">三級導航</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
</body>
</html>看完上述內容，你們對css中怎么實現一個三級下拉菜單有進一步的了解嗎？如果還想了解更多知識或者相關內容，請關注億速云行業資訊頻道，感謝大家的支持。
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