<div class="user"><span></span>个人中心</div>
.user {
    width: 108px;
    height: 34px;
    border:1px #ddd solid;
    float: right;
    margin-top: 36px;
    line-height: 34px;
    border-radius: 3px;
    transition: all 0.3s;
    -moz-transition: all 0.3s;    
    -webkit-transition: all 0.3s;
    -ms-transition: all 0.3s;
}
.user span{
    display: inline-block;
    width: 20px;
    height: 22px;
    overflow:hidden;
    margin:5px 10px 5px 10px;
    float:left;
    background-image:url(../img/user.png);
    background-repeat: no-repeat;
    background-position: 0px -22px;    
    transition: all 0.3s;
    -moz-transition: all 0.3s;    
    -webkit-transition: all 0.3s;
    -ms-transition: all 0.3s;
}

.user:hover {
    border:1px #ff9600 solid;
    color:#f00;
}
.user:hover span{
    background-position: 0px 0px;
}