<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
blockquote, body, button, dd, dl, dt, fieldset, form, h1, h2, h3, h4, h5, h6, hr, input, legend, li, ol, p, pre, td, textarea, th, ul{
margin: 0;
padding: 0;
}
h3 {
display: block;
margin: 0;
padding: 0;
}
.cat {
position: relative;
width: 150px;
background: #f8f8f8;
border: 1px solid #bbb;
}
ol, ul {
list-style: none;
}
li {
z-index: 2;
position: relative;
display: block;
height: 31px;
line-height: 31px;
overflow: hidden;
margin: 1px 10px 0;
vertical-align: bottom;
border-bottom: 1px solid #dedede
}
li h3 {
font-size: 14px;
font-weight: 400;
}
li i {
display: inline;
float: left;
margin: 3px 10px 0 0;
height: 24px;
width: 30px;
background:url(http://img.mukewang.com/539a950e00015ba500710200.jpg);
}
.cat-1 i{
background-position:0 0;
}
.cat-2 i{
background-position:0 -24px;
}
.cat-3 i{
background-position:0 -48px;
}
.cat-4 i{
background-position:0 -72px;
}
.cat-5 i{
background-position:0 -96px;
}
.cat-6 i{
background-position:0 -120px;
}
.cat-7 i{
background-position:0 -144px;
}
.cat-8 i{
background-position:0 -168px;
}
</style>
</head>
<body>
<div>
<ul>
<li calss="cat-1">
<i></i>
<h3>服装内衣</h3>
</li>
<li calss="cat-2">
<i></i>
<h3>鞋包配饰</h3>
</li>
<li calss="cat-3">
<i></i>
<h3>运动户外</h3>
</li>
<li calss="cat-4">
<i></i>
<h3>手机数码</h3>
</li>
<li calss="cat-5">
<i></i>
<h3>人妻小孩</h3>
</li>
<li calss="cat-6">
<i></i>
<h3>男士用品</h3>
</li>
<li calss="cat-7">
<i></i>
<h3>女士用品</h3>
</li>
<li calss="cat-8">
<i></i>
<h3>小孩用品</h3>
</li>
<li calss="cat-9">
<i></i>
<h3>婴儿用品</h3>
</li>
</ul>
</div>
</body>
</html><li calss="cat-9"><i></i><h3>婴儿用品</h3></li>
这里单词写错啦 class 写成 calss了
.cat i{background:url()},把i加到.cat下