无序列表(ul)中的css下拉菜单

Question

我想问您，是否有任何方法可以在ul，li标签中的Services处插入下拉菜单？我知道如何添加下拉菜单，而不是使用ul/li，我们使用按钮，但我想知道ul/li是否有其他方法，从那时起我必须重组css。。。所以你也许能理解我！我会把代码记下来，这样你就可以快速浏览一眼了。非常感谢！

<nav>
<ul class="nav-links">
<li><a class="nav-link" href="index.html" id="active">Home</a></li>
<li><a class="nav-link" href="#">Services</a></li>
<li><a class="nav-link" href="#">About</a></li>
<li><a class="nav-link" href="#">Contact</a></li>
</ul>
</nav>

Answer 1

您可以这样做：

源

#nav {
list-style: none inside;
margin: 0;
padding: 0;
text-align: center;
}
#nav li {
display: block;
position: relative;
float: left;
background: #24af15;
/* menu background color */
}
#nav li a {
display: block;
padding: 0;
text-decoration: none;
width: 200px;
/* this is the width of the menu items */
line-height: 35px;
/* this is the hieght of the menu items */
color: #ffffff;
/* list item font color */
}
#nav li li a {
font-size: 80%;
}
/* smaller font size for sub menu items */
#nav li:hover {
background: #003f20;
}
/* highlights current hovered list item and the parent list items when hovering over sub menues */
#nav ul {
position: absolute;
padding: 0;
left: 0;
display: none;
/* hides sublists */
}
#nav li:hover ul ul {
display: none;
}
/* hides sub-sublists */
#nav li:hover ul {
display: block;
}
/* shows sublist on hover */
#nav li li:hover ul {
display: block;
/* shows sub-sublist on hover */
margin-left: 200px;
/* this should be the same width as the parent list item */
margin-top: -35px;
/* aligns top of sub menu with top of list item */

<ul id="nav">
<li><a href="#">Home</a></li>
<li><a href="#">Services</a>
<ul>
<li><a href="#">Services-1</a></li>
<li><a href="#">Services-2</a></li>
<li><a href="#">SUB Services »</a>
<ul>
<li><a href="#">Sub Services 1</a>
<li><a href="#">Sub Services 2</a>
</ul>
</li>
</ul>
</li>
<li><a href="#">About</a></li>
</ul>

Answer 2

<nav>
<ul class="nav-links">
<li><a class="nav-link" href="index.html" id="active">Home</a></li>
<li><a class="nav-link" href="#">Services</a></li>
<li><a class="nav-link" href="#">About</a></li>
<li><a class="nav-link" href="#">Contact</a></li>
</ul>
</nav>