.cat{width:120px;border:1px solid gray;background:#f8f8f8;padding-right:40px;}
<div class="cat">
<ul>
<li class="cat-1">
<h3>服装内衣</h3>
</li>
<li class="cat-1">
<i></i>
<h3>鞋包配饰</h3>
</li>
<li class="cat-1">
<i></i>
<h3>运动户外</h3>
</li>
</div>
<ul>
<li class="cat-1">
<h3>服装内衣</h3>
</li>
<li class="cat-1">
<i></i>
<h3>鞋包配饰</h3>
</li>
<li class="cat-1">
<i></i>
<h3>运动户外</h3>
</li>
</div>
<meta charset="UTF-8">
<style>
h3{margin:0;padding:0}
ul{list-style:none}
li h3{font-size:14px;font-weight: 400}
li{display:block;height:31px;line-height:30px;overflow:hidden;border-bottom:1px solid #dedede}
.cat{width:150px;background:#f8f8f8;border:1px solid #bbb}
</style>
<style>
h3{margin:0;padding:0}
ul{list-style:none}
li h3{font-size:14px;font-weight: 400}
li{display:block;height:31px;line-height:30px;overflow:hidden;border-bottom:1px solid #dedede}
.cat{width:150px;background:#f8f8f8;border:1px solid #bbb}
</style>
form{width:180px;background:#EBF3FA;padding:10px;}
input{background:url(http://img1.sycdn.imooc.com//539a972b00013e9102280177.jpg) }
input.user,.key{background:none;border:1px solid #dedede;padding:5px 0; margin-bottom:10px; text-indent:2em;width:180px;}
label{font-size:13px;}
input{background:url(http://img1.sycdn.imooc.com//539a972b00013e9102280177.jpg) }
input.user,.key{background:none;border:1px solid #dedede;padding:5px 0; margin-bottom:10px; text-indent:2em;width:180px;}
label{font-size:13px;}
<span><input type="checkbox" class="checkbox" name="autologin" id="autologin"><label for="autologin">下次自动登录</label></span> <a class="forget" href="#">忘记密码?</a>
<br>
<input type="button" class="enter" >
<hr>
<input type="button" class="regedit" >
</form>
<br>
<input type="button" class="enter" >
<hr>
<input type="button" class="regedit" >
</form>