.comshare{ z-index:11; 
position:fixed; right:0; bottom:200px; width:75px; /*background-image:url(bg.png);*/}
.comshare ul li{
float:right; width:100%; position:relative;}
.comshare ul li a{ border-bottom:1px #ffffff solid; background-color:#3598db;
display:block; width:100%; color:#fff; text-align:center;   background-position:center 20px; padding-top:45px; height:30px; background-repeat:no-repeat;}
.comshare ul li span{ text-align:center; overflow:hidden; 
position:absolute; right:0; top:0; width:0px; background-color:#3598db; height:100%; z-index:-10; font-size:18px; line-height:75px; color:#fff;}
.comshare ul li:hover span{
width:150px;padding-right:75px;}
.comshare ul li img{
position:absolute; right:75px; top:0; display:none;}
.comshare ul li:hover img{
display:block;}
.comshare ul li:last-child a{
border:none;
 }
.comshare ul li a:hover{
background-color:#3598db;}