.dtbj1 {
  position: absolute;
  left: 0;
  bottom: 0%;
  z-index: -1;
  width: 100%;
  height: 100%;
  overflow: hidden;
}
.dtbj1:after {
  content: "";
  position: absolute;
  top: -100%;
  left: -100%;
  right: -100%;
  bottom: -100%;
  backdrop-filter: blur(50px);
}