.js-slider-container, .js-slider-first {
  position: relative;
  width: 100%
}

.js-slider-last, .js-slider-last-container {
  position: absolute;
  top: 0;
  right: 0;
  height: 100%
}

.js-slider-container {
  box-sizing: border-box;
  display: inline-block
}

.js-slider-last-container {
  overflow: hidden;
  -webkit-animation: bounce-in-left .8s ease-in-out .3s 1;
  animation: bounce-in-left .8s ease-in-out .3s 1;
  width: 50%
}

.js-slider-last-container:before {
  background-color: #E74C3C;
  content: '';
  height: 100%;
  top: 0;
  position: absolute;
  width: 5px;
  z-index: 1
}

.js-slider-last {
  width: auto;
  max-width: none
}
@-webkit-keyframes 
bounce-in-left { 0% {
width:100%
}
40% {
width:45%
}
60% {
width:55%
}
100% {
width:50%
}
}
@keyframes 
bounce-in-left { 0% {
width:100%
}
40% {
width:45%
}
60% {
width:55%
}
100% {
width:50%
}
}