.banner {
  overflow: hidden;
}
.banner img {
  display: block;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  max-height: 300px;
}
.banner-before,
.banner-after {
  position: absolute;
  content: "";
  top: 0;
  bottom: 0;
  width: 50%;
  background-image: url(/ressources/temp/images/100_1200x900_654096877_2023105240-martinique-1220713-1280.webp );
  background-repeat: repeat-x;
  filter: blur(8px);
  opacity: 0.5;
}
.banner-before {
  left: 0;
}
.banner-after {
  right: 0;
}