.s1900-slider{position:relative;overflow:hidden}
.slide{position:absolute;opacity:0;width:100%;transition:opacity .5s}
.slide.active{opacity:1;position:relative}
.slide img{width:100%;height:auto;display:block}
.prev,.next{position:absolute;top:50%;transform:translateY(-50%);background:#000;color:#fff;border:none;padding:10px;cursor:pointer}
.prev{left:10px}.next{right:10px}
.dots{position:absolute;bottom:10px;left:50%;transform:translateX(-50%);display:flex;gap:6px}
.dots span{width:10px;height:10px;background:#ccc;border-radius:50%;cursor:pointer}
.dots span.active{background:#000}