#block-stuslider {
  position: relative;
  width: 100%;
  height: 280px;
  overflow: hidden;
  margin-top: -20px;
  margin-bottom: 20px;
}

#block-stuslider img {
  transition: opacity 1.5s;
  position: absolute;
  top: 0;
  width: auto;
  height: auto;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
}

@media screen and (max-width: 992px) {
  #block-stuslider img {
    width: auto;
    height: 100%;
  }
}

#block-stuslider img.fadeIn {
  opacity: 1;
}