*{
  margin: 0;
  padding: 0;
  box-sizing: border-box
}
.show{
  width: 400px;
  height: 400px;
  margin: 0 auto;
  z-index:1;
  border: 1px solid #ccc;
  padding: 10px;
}
#show-img { width: 400px; height: 400px; }
.small-img{
  width: 350px;
  height: 70px;
  margin-top: 10px;
  position: relative;
  left: 35px;
}
.small-img .icon-left, .small-img .icon-right{
  width: 12px;
  height: 24px;
  cursor: pointer;
  position: absolute;
  top: 0;
  bottom: 0;
  margin: auto 0;
}
.small-img .icon-left{
  transform: rotate(180deg)
}
.small-img .icon-right{
  right: 0;
}
.small-img .icon-left:hover, .small-img .icon-right:hover{
  opacity: .5;
}
.small-container{
  width: 310px;
  height: 70px;
  overflow: hidden;
  position: absolute;
  left: 0;
  right: 0;
  margin: 0 auto;
}
.small-container div{
  width: 800%;
  position: relative;
}

.small-container .show-small-img{
width: 39px;
height: 70px;
margin-right:17px;
cursor: pointer;
float: left;
}
.small-container .show-small-img:last-of-type{
  margin-right: 0;
}