.banner {
  background-image: url(../images/about-us/banner.jpg);
}
.section {
  width: 100%;
  height: 768px;
  background-repeat: no-repeat;
  background-position: center top;
  background-size: cover;
  box-sizing: border-box;
  position: relative;
  overflow: hidden;
}
.section.show h4 {
  opacity: 1;
  transform: translateY(0);
}
.section.show p {
  opacity: 1;
  transform: translateY(0);
}
.section.show img {
  opacity: 1;
  transform: translateX(0);
}
.section:not(.teachers) {
  color: #fff;
}
.section h4 {
  width: 700px;
  height: 110px;
  line-height: 110px;
  font-size: 46px;
  font-weight: bold;
  opacity: 0;
  transform: translateY(50px);
  transition: all 1s ease-in-out;
}
.section p {
  width: 700px;
  line-height: 48px;
  font-size: 24px;
  text-align: justify;
  opacity: 0;
  transform: translateY(100px);
  transition: all 1s ease-in-out 0.3s;
}
.section img {
  position: absolute;
  opacity: 0;
  transition: all 0.7s ease-in-out 0.6s;
  transform: translateX(100px);
}
.about {
  background-image: url(../images/about-us/about.jpg);
}
.about .content {
  padding-top: 205px;
}
.about .content img {
  width: auto;
  height: 790px;
  top: 50px;
  right: -40px;
}
.culture {
  background-image: url(../images/about-us/culture.jpg);
}
.culture .content {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  padding-top: 180px;
}
.culture .content img {
  left: -200px;
  top: 130px;
}
.founder {
  background-image: url(../images/about-us/founder.jpg);
  overflow: hidden;
}
.founder .content {
  padding-top: 195px;
  color: #303030;
}
.founder img {
  right: 0;
  top: 165px;
}
.feature {
  height: 768px;
  background: url(../images/about-us/feature.jpg) no-repeat center center;
  background-size: cover;
}
.feature ul {
  display: flex;
  justify-content: space-between;
  padding-top: 110px;
}
.feature ul li {
  width: 340px;
  height: 536px;
  position: relative;
  transition: all 0.3s ease-in-out;
}
.feature ul li img {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.feature ul li .mask {
  transition: opacity 0.3s ease-in-out;
}
.feature ul li:hover {
  transform: translateY(-30px);
}
.feature ul li:hover .mask {
  opacity: 0;
}
.teachers {
  background-image: url(../images/business-school/bg-teachers.jpg);
}
.teachers .details {
  height: 768px;
  padding-top: 135px;
  box-sizing: border-box;
  position: relative;
  overflow: hidden;
}
.teachers .details h4 {
  width: 700px;
  height: 110px;
  line-height: 110px;
  font-size: 46px;
  font-weight: bold;
}
.teachers .details p {
  width: 700px;
  line-height: 48px;
  font-size: 24px;
}
.teachers .details img {
  opacity: 0;
  position: absolute;
  right: -50px;
  bottom: -50px;
}
.teachers .details img.show {
  opacity: 1;
  right: 0;
  transition: all 0.3s;
}
.teachers .swiper-content {
  width: 1400px;
  position: absolute;
  left: 0;
  bottom: 32px;
}
.teachers .swiper-content .btn {
  width: 40px;
  height: 40px;
  background: url(../images/common/btn-slider-prev-enabled.png) no-repeat;
  position: absolute;
  top: 50%;
}
.teachers .swiper-content .btn.swiper-button-disabled {
  background-image: url(../images/common/btn-slider-prev-disabled.png);
}
.teachers .swiper-content .btn.prev {
  left: -55px;
  transform: translateY(-50%);
}
.teachers .swiper-content .btn.next {
  right: -55px;
  transform: scaleX(-1) translateY(-50%);
}
.teachers .swiper-content .swiper-slide {
  float: left;
  width: 335px;
  height: 210px;
  margin-right: 20px;
  padding-top: 10px;
  position: relative;
  cursor: pointer;
}
.teachers .swiper-content .swiper-slide.active .panel,
.teachers .swiper-content .swiper-slide:hover .panel {
  height: 220px;
}
.teachers .swiper-content .swiper-slide .panel {
  width: 100%;
  height: 210px;
  background: #fff;
  border-radius: 5px;
  position: absolute;
  left: 0;
  bottom: 0;
  overflow: hidden;
  transition: all 0.3s ease-in-out;
}
.teachers .swiper-content .swiper-slide .panel::before,
.teachers .swiper-content .swiper-slide .panel::after {
  content: "";
  position: absolute;
  z-index: 0;
}
.teachers .swiper-content .swiper-slide .panel::before {
  width: 49px;
  height: 46px;
  background: url(../images/business-school/img-teacher-1.png) no-repeat;
  left: 43px;
  top: 12px;
}
.teachers .swiper-content .swiper-slide .panel::after {
  width: 102px;
  height: 102px;
  background: url(../images/business-school/img-teacher-2.png) no-repeat;
  left: 202px;
  top: 53px;
}
.teachers .swiper-content .swiper-slide .panel img {
  width: 110px;
  height: auto;
  position: absolute;
  right: 15px;
  top: 22px;
  z-index: 1;
}
.teachers .swiper-content .swiper-slide h5 {
  line-height: 60px;
  font-size: 24px;
  padding: 65px 0 0 15px;
  position: relative;
}
.teachers .swiper-content .swiper-slide p {
  width: 180px;
  line-height: 30px;
  color: #9e9e9e;
  font-size: 16px;
  padding-left: 15px;
  position: relative;
}
.history {
  height: 768px;
  background: #eff2f4;
  position: relative;
  overflow: hidden;
}
.history .bg {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
}
.history .title {
  height: 70px;
  line-height: 70px;
  text-align: center;
  font-size: 46px;
  font-weight: bold;
  padding: 30px 0 25px;
}
.history .desc {
  height: 34px;
  line-height: 34px;
  text-align: center;
  font-size: 24px;
  color: #9e9e9e;
  margin-bottom: 45px;
}
.history .swiper-content {
  width: 1166px;
  margin-left: 120px;
  position: relative;
}
.history .swiper-content .btn {
  width: 40px;
  height: 40px;
  background: url(../images/common/btn-slider-prev-enabled.png) no-repeat;
  position: absolute;
  top: 50%;
}
.history .swiper-content .btn.swiper-button-disabled {
  background-image: url(../images/common/btn-slider-prev-disabled.png);
}
.history .swiper-content .btn.prev {
  left: -70px;
  transform: translateY(-50%);
}
.history .swiper-content .btn.next {
  right: -70px;
  transform: scaleX(-1) translateY(-50%);
}
.history .swiper-content .swiper-slide {
  width: 1166px;
  height: 390px;
  position: relative;
}
.history .swiper-content .swiper-slide h5 {
  width: 530px;
  line-height: 48px;
  font-size: 30px;
  padding: 15px 0 30px;
}
.history .swiper-content .swiper-slide p {
  width: 530px;
  line-height: 48px;
  color: #9e9e9e;
  font-size: 24px;
}
.history .swiper-content .swiper-slide .pic {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 575px;
  height: 360px;
  position: absolute;
  right: 0;
  top: 0;
  overflow: hidden;
}
.history .swiper-content .swiper-slide .pic:hover img {
  transform: scale(1.1);
}
.history .swiper-content .swiper-slide .pic img {
  transition: all 0.3s ease-in-out;
}
.history .time-line {
  display: flex;
  justify-content: space-between;
  margin-top: 70px;
  position: relative;
}
.history .time-line::before {
  content: "";
  width: 100%;
  height: 2px;
  background: #aeafb0;
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
}
.history .time-line li {
  width: 56px;
  height: 26px;
  color: #9e9e9e;
  position: relative;
}
.history .time-line li.active {
  color: #00b4b4;
}
.history .time-line li.active i {
  background: rgba(0, 180, 180, 0.3);
}
.history .time-line li.active i::before {
  background: #00b4b4;
  animation: time-line-dot 2s infinite;
}
.history .time-line li.active span {
  animation: time-line-scale 0.3s;
}
.history .time-line li i {
  width: 20px;
  height: 20px;
  background: rgba(158, 158, 158, 0.3);
  border-radius: 50%;
  position: absolute;
  left: 50%;
  top: 0;
  transform: translate(-50%, 3px);
}
.history .time-line li i::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #9e9e9e;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.history .time-line li span {
  height: 26px;
  line-height: 26px;
  font-size: 24px;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  cursor: pointer;
}
.history .time-line li:nth-child(odd) span {
  top: 30px;
}
.history .time-line li:nth-child(even) span {
  top: -30px;
}
.honor .title {
  height: 80px;
  line-height: 80px;
  text-align: center;
  font-size: 46px;
  font-weight: bold;
  padding: 30px 0 60px;
}
.honor ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}
.honor ul li {
  width: 250px;
  margin: 0 30px 70px;
  opacity: 0;
  transform: translateX(30px);
  transition: all 0.3s ease-in-out;
}
.honor ul li.show {
  opacity: 1;
  transform: translateX(0);
}
.honor ul li:hover {
  transform: translateY(-5px);
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
.honor ul li .pic {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 250px;
  height: 165px;
}
.honor ul li p {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 140px;
  line-height: 32px;
  color: #9e9e9e;
  font-size: 20px;
  padding: 0 20px;
}
@keyframes cloud_one {
  0% {
    left: 0;
  }
  100% {
    left: -200%;
  }
}
@keyframes cloud_two {
  0% {
    left: 0;
  }
  100% {
    left: -200%;
  }
}
@keyframes cloud_three {
  0% {
    left: 0;
  }
  100% {
    left: -200%;
  }
}
.sky {
  position: absolute;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
}
.sky .clouds_one {
  background: url("../images/about-us/cloud_one.png") repeat-x;
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 300%;
  animation: cloud_one 250s linear infinite;
  transform: translate3d(0, 0, 0);
}
.sky .clouds_two {
  background: url("../images/about-us/cloud_two.png") repeat-x;
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 300%;
  animation: cloud_two 250s linear infinite;
  transform: translate3d(0, 0, 0);
}
.sky .clouds_three {
  background: url("../images/about-us/cloud_three.png") repeat-x;
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 300%;
  animation: cloud_three 250s linear infinite;
  transform: translate3d(0, 0, 0);
}