.gss-slider{position:relative;overflow:hidden}
.gss-slide{display:none}
.gss-slide.active{display:block}
.gss-slide img{width:100%}
.gss-prev,.gss-next{position:absolute;top:50%;transform:translateY(-50%);background:#000;color:#fff;border:none;padding:10px;cursor:pointer}
.gss-prev{left:10px}.gss-next{right:10px}