#top .avia-fullwidth-slider::after {
  position: absolute;
  display:  inline-block;
  content: "";
  width: 30vw;
  height: 10.5vw;
  top: 200px;
  left: 100px;
  background-image: url(https://webers-testseite.de/wp-content/uploads/webers-webdesign-white.svg);
  background-repeat: no-repeat;
  background-size: 25vw;
  background-position: center center;
  background-color: rgba(255,255,255,0.3);
  backdrop-filter: blur(4px);
  border-radius:2vw;
  filter: drop-shadow(1px 1px 2px #666);
}

@media only screen and (max-width: 767px) {
  #top .avia-fullwidth-slider::after {
    top: 10vw;
    left: 5vw;
  }
}