css图片预览截取，类似于微信朋友圈图片预览

<div class="zoomImage " id="loinsIndexlogo" style="background-image: url(http://localhost:81/img/user/a213287f-04e5-46ee-bb6e-3110d6114bb7.JPG)"></div>

.zoomImage{
width:100%;
height:0;
padding-bottom: 100%;
overflow:hidden;
background-position: center center;
background-repeat: no-repeat;
-webkit-background-size:cover;
-moz-background-size:cover;
background-size:cover;
border: 1px #ddd solid;
}