.content-container {
  padding: 150px 400px;
  font-size: 36px;
  color: #333333;
}
.banner {
  width: 1060px;
  height: 500px;
  margin-bottom: 104px;
}
.teacher-flex {
  display: flex;
  margin-top: 100px;
  align-items: center;
  justify-content: space-between;
}
.title {
  margin-top: 140px;
  font-size: 48px;
  color: #333333;
}
.center {
  text-align: center;
}
.title-line {
  width: 334px;
  height: 10px;
}
.title-line-fill {
  width: 1082px;
  height: 10px;
  margin: 36px 0 100px;
}
.business {
  margin-top: 88px;
}
.business-item {
  position: relative;
  padding-bottom: 90px;
}
.business-tail {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 18px;
  border-left: 1px dashed #FFB838;
}
.first-tail {
  top: 36px;
}
.business-dot {
  position: absolute;
  left: 0;
  top: 9px;
  width: 36px;
  height: 36px;
}
.business-content {
  margin-left: 55px;
}
.y-title {
  font-size: 42px;
  color: #FFB838;
}
.mg-top-30 {
  margin-top: 30px;
}
.mg-bottom-330 {
  margin-bottom: 330px;
}
.lecture {
  margin-top: 85px;
}
.lecture-img {
  width: 530px;
  height: 299px;
}
.course {
  width: calc(100% + 120px);
  margin-left: -60px;
}
.course-img {
  width: 293px;
  height: 177px;
}
.line-height-60 {
  line-height: 60px;
}
.production {
  margin: 115px 0 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.production-img {
  width: 250px;
  height: 540px;
}
.production-img-2 {
  width: 268px;
  height: 578px;
}
.book {
  display: flex;
}
.book-img {
  width: 591px;
  height: 389px;
}
.book-img-2 {
  width: 358px;
  height: 269px;
}
.book-content {
  flex: 1;
  margin-left: 34px;
  display: flex;
  flex-flow: column;
  justify-content: space-between;
}
.book-title {
  font-size: 42px;
  color: #101010;
}
.book-sub-title {
  font-size: 36px;
  margin-top: -15px;
  color: #101010;
}
.footer {
  width: 100%;
  height: 200px;
  display: flex;
  flex-direction: row;
  justify-content: center;
  font-size: 14px;
  border-top: 1px solid #BFBFBF;
}
.footer .footer-content {
  width: 1200px;
  height: 100%;
  margin: auto;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
}
.footer-left {
  padding-top: 3%;
  padding-left: 12%;
  width: 50%;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.footer-left span, .footer-right span {
  padding-top: 10px;
}
.footer-right {
  padding-top: 3%;
  padding-left: 10%;
  width: 50%;
  height: 100%;
  display: flex;
  flex-direction: column;
}
a {
  color: #3097D1;
  text-decoration: none;
}