.a-tan {
  background: url('../images/tan-removal/visibletanreversal-eventone-after.png') center/cover no-repeat;
}

.b-tan {
  background: url('../images/tan-removal/visibletanreversal-eventone-before.png') center/cover no-repeat;
}

.a-pig {
  background: url('../images/tan-removal/melasma-darkspotsreduced-after.png') center/cover no-repeat;
}

.b-pig {
  background: url('../images/tan-removal/melasma&darkspotsreduced-before.png') center/cover no-repeat;
}

.a-kor {
  background: url('../images/tan-removal/glass-skin-glow-after.jpg') center/cover no-repeat;
}

.b-kor {
  background: url('../images/tan-removal/glass-skin-glow-before.jpg') center/cover no-repeat;
}

.hc-a {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: url('../images/tan-removal/banner/real-patient-tan-removal-after.jpg') center/cover no-repeat;
  z-index: 1;
}

.hc-b {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: url('../images/tan-removal/banner/real-patient-tan-removal-before.jpg') center/cover no-repeat;
  z-index: 2;
  clip-path: polygon(0 0, 50% 0, 50% 100%, 0 100%);
}