.btn-wsp{
    position:fixed;
    width:60px;
    height:60px;
    line-height: 63px;
    bottom:75px;
    right:10px;
    background:#25d366;
    color:#FFF;
    border-radius:8px; /*  50px  */ 
    text-align:center;
    font-size:55px; /* 35px; */
    box-shadow: 0px 1px 10px rgba(0,0,0,0.3);
    z-index:100;
    transition: all 300ms ease;
}
.btn-wsp:hover{
    background: #20ba5a;
}
@media only screen and (min-width:320px) and (max-width:768px){
    .btn-wsp{
        width:63px;
        height:63px;
        line-height: 66px;
	}
}