<div class="wrapper">
<div class="cell">
<div class="content"><img src="img/不重样1.jpg"/></div>
</div>
</div>
<!--方法二-->
<div class="con2">
<div class="content2">这里里这里</div>
</div>
<!--方法三-->
<div class="con3">
<div class="floater"></div>
<div class="content3">居中居中</div>
</div>
