#slideSideMask {
  position: relative;
  height: 600px;
  width: 1200px;
  margin: 0 auto;
}
#slideSideMask a {
  float: left;
  display: inline;
}
#slideSideMask .img {
  position: absolute;
  width: 1200px;
  height: 600px;
  overflow: hidden
}
#slideSideMask .img span {
  position: absolute;
  width: 19999px;
  display: block
}
#slideSideMask .btns {
  z-index: 10;
  position: absolute;
  width: 1200px
}
#slideSideMask .btns B {
  position: absolute;
  width: 100px;
  display: block;
  height: 14px;
  overflow: hidden;
  top: 295px;
  left: 50%
}
#slideSideMask .btns B I {
  width: 10px;
  background: #414140;
  float: left;
  height: 10px;
  font-size: 0px;
  overflow: hidden;
  cursor: pointer;
  margin-right: 6px;
  border: #414140 2px solid;
  -webkit-border-radius: 7px;
  -moz-border-radius: 7px;
  border-radius: 7px
}
#slideSideMask .btns B I:hover {
  background: #a7a7a6
}
#slideSideMask .btns B I.on {
  background: #3cd2f1;
  cursor: default
}
#slideSideMask .btns B I.on:hover {
  background: #3cd2f1;
  cursor: default
}
#slideSideMask .btns span {
  position: absolute;
  width: 60px;
  height: 80px;
  overflow: hidden;
  top: 260px;
  cursor: pointer;
  opacity: .3;
  transition: opacity 0.2s ease-in-out;
}
#slideSideMask:hover .btns span{
  opacity:.8
}
#slideSideMask .btns span i {
  font-size: 72px;
  color:#fff;
  line-height:80px;
}
#slideSideMask .btns span.prev {
  left: 40px
}

#slideSideMask .btns span.next {
  right: 50px
}
.show-hover#slideSideMask .btns span {
  display: block
}
.masks {
  height: 600px;
  position: absolute;
  overflow: hidden
}
.masks:before{
  content:'';
  position: absolute;
  width:100%;
  height:600px;
  background-color: rgba(0,0,0,.5);
  filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#7F000000,endColorstr=#7F000000);
  z-index: 2;
}