.is-style-h-arabesque-centre {
  position: relative;
  padding-bottom: 50px;
}
.is-style-h-arabesque-centre:before {
  content: "";
  background-image: url(img/fond-sous-titre.svg);
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  width: 368px;
  max-width: 70%;
  height: 25px;
  display: inline-block;
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
}