.control-box {
    width: 1350px;
    height: 200px;
    margin-left: auto;
    margin-right: auto;
}
.control-box ul {
  list-style: none;
  position: relative;
}
.control-box ul li {
  position: absolute;
  top: 50px;
  cursor: pointer;
}
.prev {
  left: 0;
}
.next {
  right: 0;
}
.bigbox {
  overflow: hidden;
  width: 1200px;
  height: 234px;
  margin: auto 70px auto;
}
#switcher {
  height: 234px;
  left: 0px;
}
.content_1.content_2 {
  width: 100%;
  float: left;
}
.box {
  transition:all .7s ease 0s;
  height: 200px;
  float: left;
  border-left: 3px white solid;
}
.box:hover {
 opacity:0.5;
}