#index_welcome{position:fixed;top:0;left:0;right:0;bottom:0;z-index:99999999999 !important;background-image:url(../image/welcome.jpg);background-size:cover;background-position:center;transition:all 0.6s}#index_welcome.close{transform:translateY(-100%)}.welcome-video{position:fixed;top:0;left:0;right:0;bottom:0;z-index:99999999999 !important;width:100%;height:100%;object-fit:cover;transform:translate3d(0, 0, 0);transition:all 0.8s}.welcome-video.close{transform:translate3d(0, -100%, 0)}