.Grossbuchstaben {
  text-transform: uppercase;
}

.Querstrich {
  position: relative;
}

.Querstrich :after {
  position: absolute;
  content: '';
  width: 40px;
  border-bottom: 1px solid gray;
  transform: rotate(45deg);
  height: 1px;
  bottom: -25px;
  left: calc(50% - 25px);
}