.ys_gs:hover{color:#fff;}
.List a{display:block;text-align: center;}
.List .slick-slide img{margin:auto;}
.List .slick-prev{background:url(images/ks_left.png)center no-repeat;height: 38px;width: 22px;top: 40%;}
.List .slick-next{background:url(images/ks_right.png)center no-repeat;height: 38px;width: 22px;top: 40%;}