旋转

.product_acesure, .product_boxsure, .product_cloudsure, .product_docsure{
    background: url("image/product.png") no-repeat 0 0;
    float:left;
    height: 100px;
    transition: all 0.2s ease 0s;
     100px;
    margin-left:10px;
}
.r-cont li:hover em{-moz-transform:scaleX(-1);-webkit-transform:scaleX(-1);-o-transform:scaleX(-1);transform:scaleX(-1);}
.product_acesure{background-position:0 -100px;}
.product_boxsure{background-position:0 -200px;}
.product_smartsure{background-position:0 -300px;}
.product_docsure{background-position:0 -400px;}
.product_docsure {background-position: 0 -400px;}