.slider {
  padding: 0;
  margin: 0;
  max-width: 100%;
  max-height:100%;
  margin: 0 auto;
  overflow: hidden;
  z-index: 1;
}

.slider ul {
  z-index: -1;
  width: 1000%;
  height: auto;
  position: relative;
  list-style: none;
  left: 0;
  margin: 0;
  padding: 0;
  line-height: 0;
  -moz-animation:slide-animation 12s infinite;
  -webkit-animation:slide-animation 12s infinite;
}

.slider li {
  width: 10%;
  list-style: none;
  float: left;
  margin: 0;
  padding: 0;
}


@-webkit-keyframes slide-animation {
  1% {left: 0%; opacity: 1;}
  18% {left: 0%; opacity: 1}
  19% {opacity: 0.2;}
  20% {left: -100%; opacity: 1;}
  58% {left: -100%; opacity: 1;}
  59% {opacity: 0.2;}
  60% {left: -200%; opacity: 1;}
  98% {left: -200%; opacity: 1;}
  99% {opacity: 0.5;}
  100% {left: 0%;}
}

@-moz-keyframes slide-animation {
  1% {left: 0%; opacity: 1;}
  18% {left: 0%; opacity: 1}
  19% {opacity: 0.2;}
  20% {left: -100%; opacity: 1;}
  58% {left: -100%; opacity: 1;}
  59% {opacity: 0.2;}
  60% {left: -200%; opacity: 1;}
  98% {left: -200%; opacity: 1;}
  99% {opacity: 0.5;}
  100% {left: 0%;}
} 






* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
:root {
  font-size: calc(0.5vw + 1vh + 0.5vmin);
}
.intro {
  position: relative;
  margin: 2em;
  padding: 0.2em 0.6em;
  cursor: pointer;
  color: #fff;
  font-size: 2em;
  max-width: 100%;
}
.intro h1 {
  margin-bottom: 0.5em;
  line-height: 1;
  font-weight: 100;
}
#CrossFade {
  background: #fff;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: end;
      -ms-flex-align: end;
          align-items: flex-end;
  height: 100vh;
  overflow: hidden;
  position: relative;
  z-index: -1;
}
#CrossFade img {
  position: absolute;
  min-width: 100%;
  min-height: 100%;
  height: auto;
  background: #000;
  -webkit-backface-visibility: hidden;
          backface-visibility: hidden;
  opacity: 0;
  -webkit-transform: scale(1.4) rotate(12deg);
          transform: scale(1.4) rotate(12deg);
  -webkit-animation: CrossFade 24s infinite;
          animation: CrossFade 24s infinite;
}
#CrossFade img:nth-child(3) {
  -webkit-animation-delay: 6s;
          animation-delay: 6s;
}
#CrossFade img:nth-child(2) {
  -webkit-animation-delay: 12s;
          animation-delay: 12s;
}
#CrossFade img:nth-child(1) {
  -webkit-animation-delay: 18s;
          animation-delay: 18s;
}
/* 

$duration = 12
$slides = 4
$step = $duration/$slides
setDelayRevers($duration, $slides)
  
  for index in (2..$slides)
    &:nth-child({index -1}) 
      animation-delay ($step*index)s

#CrossFade
  height 100vh
  overflow hidden
  position relative
  
  display flex
  img
    align-self center
    position absolute
    
    min-width 100%
    min-height 100%
    height auto
    
    backface-visibility hidden
    opacity 0
  
    transform scale(1.4) rotate(12deg)
    animation CrossFade ($duration)s infinite 
    setDelayRevers($duration, $slides)   
@keyframes CrossFade
  25%
    opacity 1
    transform scale(1) rotate(0)
  40%
    opacity 0
    
*/
@-webkit-keyframes CrossFade {
  25% {
    opacity: 1;
    -webkit-transform: scale(1) rotate(0);
            transform: scale(1) rotate(0);
  }
  40% {
    opacity: 0;
  }
}
@keyframes CrossFade {
  25% {
    opacity: 1;
    -webkit-transform: scale(1) rotate(0);
            transform: scale(1) rotate(0);
  }
  40% {
    opacity: 0;
  }
}
#hevader{
  height:100%;
}
@media (max-width: 1024px)  {
  #CrossFade {
    height: 60vh;
  }
  #hevader{
    height:70%;
  }
}