.control-box {
    width: 1200px;
    height: 230px;
}
.center_box ul {
  list-style: none;
  position: relative;
}
.center_box ul li {
  position: absolute;
  top: 200px;
  cursor: pointer;
}
.prev {
  left: -50px;
}
.next {
  right: -50px;
}
.bigbox {
  overflow: hidden;
  width: 1200px;
  height:440px;
  margin: auto;
}
#switcher {
  height: 440px;
  left: 0px;
}