.teacher .control-box ul {
  list-style: none;
  position: relative;
}
.teacher .control-box ul li {
  position: absolute;
  top: 50px;
  cursor: pointer;
}
.teacher .prev {
  left: 0;
}
.teacher .next {
  right: 0;
}
.teacher .bigbox {
  overflow: hidden;
  width: 1116px;
  height: 157px;
  margin: 25px auto 0;
}
.teacher #switcher {
  height: 157px;
  left: 0px;
}
.teacher .content_1.content_2 {
  width: 100%;
  float: left;
}
.teacher .content_1>a{display: block;}
.teacher .content_2>a{display: block;}
.teacher .box {
  transition:all .7s ease 0s;
  width: 252px;
  height: 157px;
  float: left;
  border-left: 34px white solid;
  position: relative;
}
.teacher .content_1 a:first-child .box{border-left: none;}
/* .teacher .box:first-child{border-left:none;} */
.teacher .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;
}
.teacher .shadow a {
  display: inline-block;
  width: 225px;
  height: 60px;
  color: white;
  text-decoration: none;
  margin-left: 18px;
  margin-top: 10px;
}