.slideshow {
  position: relative;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}
.slideshow .item {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  display: none;
  background-size: cover;
  background-position: center,center;
background-attachment: fixed;
}
.in {
  -webkit-transform: scale(1);
  transform: scale(1);
  z-index: 2; 
}
.out {
  -webkit-transform: scale(1.25);
  transform: scale(1.25);
  -webkit-transition: 4s;
  transition: 4s;
  z-index: 1;
}
.wrap {
  position: relative;
}
.title {
  position: absolute;
  transform: translate(calc(50vw - 50%),calc(50vh - 50%));
  z-index: 10;
  color: rgba(102, 102, 102, 0.70);
}