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