.icon-ask {
    width: 0.65rem;
    height: 0.575rem;
    background: url(../images/sprite.png) 0rem 0rem no-repeat;
    background-size: 0.65rem 1.6rem;       
}
.icon-finger {
    width: 0.65rem;
    height: 0.775rem;
    background: url(../images/sprite.png) 0rem -0.825rem no-repeat;
    background-size: 0.65rem 1.6rem;       
}