.control-box {
    width: 1000px;
    height: 200px;
    margin-left: auto;
    margin-right: auto;
}
.control-box ul,.control-box .pn{
  list-style: none;
  position: relative;
  width:930px;
}
.control-box .pn .prev,.control-box .pn .next{
  position: absolute;
  top: 50px;
  cursor: pointer;
  width: 30px;
  background:none;
}
.control-box .pn .next {
  position: absolute;
  top: 50px;
  cursor: pointer;
  width: 30px;
  background:none;
}
.prev {
  left: 0;
  width:30px;
}
.next {
  right: 0;
  width:30px;
}
.bigbox {
  overflow: hidden;
  width: 860px;
  height: 190px;
  margin: auto 40px auto;
}
#switcher {
  height: 190px;
  left: 0px;
}
.content_1.content_2 {
  width: 100%;
  float: left;
}
.box {
  transition:all .7s ease 0s;
  width: 255px;
  height: 190px;
  float: left;
  border-left: 3px white solid;
}
.box:hover {
 opacity:0.5;
}
.shadow {
  width: 255px;
  height: 60px;
  /* opacity: 1; */
  background-color: rgba(0, 0, 0, 0.45);
  filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=#66000000,endColorstr=#66000000);
  margin-top: 130px;
  color: white;
  font-size: 14px;
}
.shadow a {
  display: inline-block;
  width: 225px;
  height: 60px;
  color: white;
  text-decoration: none;
  margin-left: 18px;
  margin-top: 10px;
}