}
.nav>li{
list-style: none;
float: left;
width: 120px;
line-height: 40px;
background-color: green;
margin-left: 10px;
text-align: center;
}
</style>
< / head >
< body >
< ul class= "nav" >
<li>
<ul class="sub">
<li></li>
<li></li>
<li></li>
<li></li>
<li></li>
</ul>
</li> first of all, you need to understand what a sub-selector is, which selects direct child elements.
so the .nav > li written in your style refers to the direct child element li in .nav , and does not include the li element
sub .
Update: emmmmmm, I don't understand what you are trying to say.
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