body {
  margin: 0;
}
.layer {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-size: cover;
  background-position: bottom center;
}

.layer-back {
  position: fixed;
  background-image: url('/assets/test2.png');
  z-index: 1;
}

.layer-mid {
  background-image: url('/assets/test3.png');
  z-index: 2;
}

.layer-front {
  background-image: url('/assets/test1.png');
  z-index: 3;
}
.container_after {
  margin-top: 100vh;
  z-index: 4;
  height: 900px;
  background: #1e1e1e;
}
.tilte {
  font-size: 60px;
  color: white;
  z-index: 6;
}