float:left;
border:1px solid silver;
box-sizing:border-box;
background-color:white;
cursor: pointer;
}
.tab-control li:hover{
background-color:#7b7474
}
.tab-control a{
display:inline-block;
width:100%;
height:100%;
line-height:100%;
text-align:center;
text-decoration: none;
}
.tab-control a::after{
content:"";
display:inline-block;
height:100%;
vertical-align:middle;
}
上述方法只是利用了锚点切换，没有使用：target。修改CSS
ul,li{
margin:0;
padding:0;
list-style:none;
}
.container{
width:400px;
height:300px;
background-color:silver;
}
.tab-content{
position:relative;
width:100%;
height:80%;
overflow:hidden;
}
.tab-content .item{
position:absolute;
left:0;
top:0;
width:100%;
height:100%;
}
.tab-control{
width:100%;
height:20%;
}
.tab-control ul{
height:100%;
}
.tab-control li{
width:25%;
height:100%;
float:left;
border:1px solid silver;
box-sizing:border-box;
background-color:white;
cursor: pointer;
}
.tab-control li:hover{
background-color:#7b7474
}
.tab-control a{
display:inline-block;
width:100%;
height:100%;
line-height:100%;
text-align:center;
text-decoration: none;
}
.tab-control a::after{
content:"";
display:inline-block;
height:100%;
vertical-align:middle;
}.tab-content .item:target{
z-index:1;
background-color:yellow;
}
item使用绝对定位，然后使用:target修改元素z-index达到切换效果（其实也可以通过控制元素的display来达到切换效果）
（2）针对布局二：
<div class="container">
<ul>
<li class="item active" id="item1">
<p class="title"><a href="#item1">1</a></p>
<p class="content">1</p>
</li>
<li class="item" id="item2">
<p class="title"><a href="#item2">2</a></p>
<p class="content ml1">2</p>
</li>
<li class="item" id="item3">
<p class="title"><a href="#item3">3</a></p>
<p class="content ml2">3</p>
</li>
<li class="item" id="item4">
<p class="title"><a href="#item4">4</a></p>
<p class="content ml3">4</p>
</li>
</ul>
</div>
