.box_teacher {
  position: relative;
  background: url("/pc/module/aiapp/image/part12-bg.jpg") no-repeat center top;
  padding: 80px 0 90px;
}
.box_teacher .box_hd h2 {
  color: #333333;
}
.box_teacher .box_hd h2 span {
  color: #177ff1;
}
.box_teacher .box_hd p {
  color: #666666;
}
.box_teacher .btnbox .a_btn::after {
  top: auto;
}
.box_teacher .teacher_cen {
  position: relative;
  margin-top: 69px;
}
.box_teacher .teacher_cen .slideteacher {
  height: 100%;
}
.box_teacher .teacher_cen .bd {
  height: 408px;
  overflow: hidden;
}
.box_teacher .teacher_cen ul li {
  position: relative;
  width: 1200px;
}
.box_teacher .teacher_cen ul li .pic {
  width: 277px;
  border-radius: 14px;
  padding: 0 10px 0 2px;
}
.box_teacher .teacher_cen ul li .pic img {
  border-radius: 8px;
  margin-left: 27px;
  width: 270px;
}
.box_teacher .teacher_cen ul li .main {
  position: absolute;
  left: 336px;
  top: 50%;
  width: 790px;
  transform: translate(0, -50%);
}
.box_teacher .teacher_cen ul li .main h3 {
  display: flex;
  font-size: 22px;
  color: #333;
  line-height: 23px;
  font-weight: bold;
  margin-bottom: 18px;
}
.box_teacher .teacher_cen ul li .main h3 span {
  display: inline-block;
  height: 23px;
  font-size: 12px;
  color: #fff;
  border-radius: 10px;
  background: #2994ff;
  font-weight: normal;
  padding: 0 14px;
  margin-left: 16px;
}
.box_teacher .teacher_cen ul li .main .mainp2 {
  position: relative;
  font-size: 15px;
  color: #303030;
  line-height: 26px;
  padding-left: 18px;
}
.box_teacher .teacher_cen ul li .main .mainp2s {
  padding-left: 11px;
}
.box_teacher .teacher_cen ul li .main .mainp2:before {
  position: absolute;
  left: 0;
  width: 9px;
  height: 9px;
  content: "·";
  color: #177ff1ff;
}
.box_teacher .teacher_cen ul li .main .mainp3 {
  font-size: 15px;
  color: #303030ff;
  line-height: 24px;
  margin: 22px 0 28px 14px;
  position: relative;
}
.box_teacher .teacher_cen ul li .main .mainp3::before {
  position: absolute;
  content: "";
  display: block;
  clear: both;
  background: url("/pc/module/aiapp/image/part12-icon1.png") repeat-x;
  height: 52px;
  width: 16px;
  top: 50%;
  left: -24px;
  transform: translateY(-50%);
}
.box_teacher .teacher_cen ul li .main .mainp3::after {
  position: absolute;
  content: "";
  display: block;
  clear: both;
  background: url("/pc/module/aiapp/image/part12-icon2.png") repeat-x;
  height: 52px;
  width: 16px;
  top: 50%;
  right: -14px;
  transform: translateY(-50%);
}
.box_teacher .teacher_cen ul li .main .btnbox {
  justify-content: left;
  margin-top: 20px;
}
.box_teacher .teacher_cen .prev {
  position: absolute;
  top: 136px;
  left: -25px;
  width: 35px;
  height: 51px;
  background: url(/pc/module/aiapp/image/arrow-left.png) no-repeat;
}
.box_teacher .teacher_cen .next {
  position: absolute;
  top: 136px;
  right: -24px;
  width: 35px;
  height: 51px;
  background: url(/pc/module/aiapp/image/arrow-right.png) no-repeat;
}