*{
  margin:0;
  padding: 0;
}
/* COMMON DEMO STYLE */
.page-view {
  height: 100%;
  width: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

.page-view .project {
  position: absolute;
  width: 100%;
  height: 100%;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
}


.page-view .project:nth-child(1) {
  z-index: 30;
}



.page-view .arrows {
  position: absolute;
  width: 1708px;
  height: 48px;
  bottom: 50px;
  left: 50%;
  z-index: 100;
  -webkit-transform: translateX(-50%);
  -ms-transform: translateX(-50%);
  transform: translateX(-50%);
}

.page-view .arrows .arrow {
  position: absolute;
  width: 48px;
  height: 48px;
  top: 0;
  cursor: pointer;
  background-repeat: no-repeat;
  background-position: center;
  -webkit-background-size: 100%;
  background-size: 100%;
  transition: background-image .3s;
}
.page-view .arrows .arrow.previous{
  background-image: url(../images/left125.png);
  left: 0;
}
.page-view .arrows .arrow.next{
  background-image: url(../images/right125.png);
  left: 70px;
}
.page-view .arrows .arrow.previous:hover{
  background-image: url(../images/left125h.png);

}

.page-view .arrows .arrow.next:hover{
  background-image: url(../images/right125h.png);

}




@-webkit-keyframes mask-play {
  from {
    -webkit-mask-position: 0% 0;
            mask-position: 0% 0;
  }
  to {
    -webkit-mask-position: 100% 0;
            mask-position: 100% 0;
  }
}

@keyframes mask-play {
  from {
    -webkit-mask-position: 0% 0;
            mask-position: 0% 0;
  }
  to {
    -webkit-mask-position: 100% 0;
            mask-position: 100% 0;
  }
}


/* SPECIFIC DEMO STYLE */

.banner{
  position: relative;
  height: 100%;
}



 .page-view .project:nth-child(even).hide {
  -webkit-mask: url(../images/nature-sprite.png);
          mask: url(../images/nature-sprite.png);
  -webkit-mask-size: 2300% 100%;
          mask-size: 2300% 100%;
  -webkit-animation: mask-play 1.4s steps(22) forwards;
          animation: mask-play 1.4s steps(22) forwards;
}

 .page-view .project:nth-child(odd).hide {
  -webkit-mask: url(../images/nature-sprite-2.png);
          mask: url(../images/nature-sprite-2.png);
  -webkit-mask-size: 7100% 100%;
          mask-size: 7100% 100%;
  -webkit-animation: mask-play 1.4s steps(70) forwards;
          animation: mask-play 1.4s steps(70) forwards;
}



@media only screen and (max-width: 1800px){
  .page-view .arrows{
    width: 1400px;
  }
}
@media only screen and (max-width: 1500px){
  .page-view .arrows{
    width: 1200px;
    height: 40px;
    bottom: 35px;
  }
  .page-view .arrows .arrow{
    width: 40px;
    height: 40px;
  }
  .page-view .arrows .arrow.next{
    left: 60px;
  }
}
@media only screen and (max-width: 1200px){
  .page-view .arrows{
    width: 100%;
    left: 0;
    -webkit-transform: translateX(0%);
    -ms-transform: translateX(0%);
    transform: translateX(0%);
    height: 0;
    top: 50%;
  }
  .page-view .arrows .arrow{
    top: 50%;
    -webkit-transform: translateY(-50%);
    -ms-transform: translateY(-50%);
    transform: translateY(-50%);
  }
  .page-view .arrows .arrow.previous{
    left: 15px;
  }
  .page-view .arrows .arrow.next{
    left: auto;
    right: 15px;
  }
}
@media only screen and (max-width: 1200px){
  .page-view .arrows .arrow{
    width: 30px;
    height: 30px;
  }
}