.main_wrap {
  margin: 0;
}

img {
  display: block;
}

.menu_img {
  display: none;
}

video {
  object-fit: cover;
  border-radius: 12px;
}

.main_img {
  width: 100%;
  height: auto;
}

/* 关于 */
.about_wrap {
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  padding: 100px 18.77%;
  background-image: url(../../images/about/about_bg.jpg);
  background-size: 100% 100%;
  background-repeat: no-repeat;
}

.time_active {
  animation: rotate 2s linear infinite;
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
    /* 从 0 度开始旋转 */
  }

  to {
    transform: rotate(360deg);
    /* 旋转一圈，360 度 */
  }
}

.about_title {
  font-size: 40px;
  color: #1d2129;
  text-align: center;
  font-weight: 549;
}

.about_content {
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  margin: 60px 0 0 0;
}

.about_text {
  font-size: 20px;
  color: #1d2129;
  margin: 0 0 32px 0;
  line-height: 32px;
}

.about_intro {
  margin: 32px 0 0 0;
  display: flex;
}

.intro_left {
  width: calc(100% - 36.5vw)
}

.intro_item {
  border-bottom: 1px solid #dadce0;
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  padding: 32px 0;
}

.intro_item:last-of-type {
  border-bottom: none;
}

.year_text {
  display: flex;
  align-items: center;
  color: #1575fe;
  font-size: 40px;
  font-weight: 800;
}

.year_text>span {
  font-size: 20px;
  margin: 10px 0 0 0;
}

.intro_text {
  font-size: 16px;
  color: #4e5769;
}

.video_wrap {
  width: 36.4vw;
  height: 27.5vw;
  position: relative;
  margin: 0 0 0 60px;
}

.video_poster {
  width: 100%;
  height: 100%;
}

.play_icon {
  width: 112px;
  height: 112px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate3d(-50%, -50%, 0);
}

/* 我们的历程 */
.course_wrap {
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  padding: 100px 0;
  background: url("../../images/about/course_bg.jpg") center center no-repeat;
  background-size: 100% 100%;
  color: #fff;
}

.course_title {
  font-size: 40px;
  color: #fff;
  text-align: center;
}

.time-line{
  width: 80%;
  margin: 0 auto;
  margin-top: 50px;
  padding: 0 100px;
  position: relative;
  box-sizing: border-box;
}
.time-line .swiper{
  padding-top: 100px;
  padding-bottom: 100px;
  overflow: hidden;
  position: relative;
}
.time-line .swiper::after{
  content: '';
  display: block;
  width: 100%;
  height: 0;
  border: 1px solid;
  border-image: linear-gradient(270deg, #0253c2 0%, #00c3c4 100%) 1 1;
  position: absolute;
  top: 50%;
  left: 0;
}
.time-line .swiper .swiper-slide{
  position: relative;
  cursor: pointer;
}
.time-line .swiper .swiper-slide::before{
  content: '';
  display: block;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid #01c3c4;
  background-color: #fff;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate3d(-50%,-50%,0);
}
.time-line .swiper .swiper-slide .active-img{
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate3d(-50%,-50%,0);
  opacity: 0;
  transition: all .3s;
}
.time-line .swiper .swiper-slide .active-img::after{
  content: '';
  display: block;
  width: 80px;
  height: 80px;
  background: url(../../images/about/time_active.png) no-repeat center center;
  background-size: contain;
  animation: rotate 2s linear infinite
}
.time-line .swiper .swiper-slide span{
  position: absolute;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  font-size: 20px;
  font-weight: bold;
  transition: all .5s;
}
.time-line .swiper .swiper-slide.active .active-img{
  opacity: 1;
}
.time-line .swiper .swiper-slide.active span{
  font-size: 32px;
  bottom: 41px;
}
.time-line .swiper-button-next::after,
.time-line .swiper-button-prev::after{
  display: none;
}
.time-line .swiper-button-next img,
.time-line .swiper-button-prev img{
  display: block;
  width: 40px;
  height: 40px;
}

.history{
  width: 80%;
  margin: 0 auto;
  margin-top: 20px;
  /* padding: 0 100px; */
  position: relative;
  box-sizing: border-box;
}
.history .swiper{
  overflow: hidden;
}
.history .swiper-slide{
  display: flex;
  align-items: center;
  justify-content: flex-start;
}
.history .swiper-slide .item-img{
  flex-shrink: 0;
  width: 564px;
  margin-right: 60px;
}
.history .swiper-slide .item-img img{
  display: block;
  width: 100%;
  height: auto;
}
.history .swiper-slide .item-text{
  flex-grow: 1;
}
.history .swiper-slide .item-text .t1{
  font-weight: bold;
  font-size: 24px;
}
.history .swiper-slide .item-text .t1 span{
  font-size: 58px;
}
.history .swiper-slide .item-text .t2 p{
  margin-top: 24px;
}
.history .swiper-slide .item-text .t2 p span{
  display: inline-block;
  margin-right: 32px;
  color: #00f0ff;
}

@media screen and (max-width:1680px) {
  .time-line .swiper .swiper-slide span{
    font-size: 16px;
  }
  .time-line .swiper .swiper-slide.active span{
    font-size: 28px;
  }
  .history .swiper-slide .item-img{
    width: 493px;
  }
  .history .swiper-slide .item-text .t1{
    font-size: 21px;
  }
  .history .swiper-slide .item-text .t1 span{
    font-size: 50px;
  }
}
@media screen and (max-width:1366px) {
  .time-line .swiper .swiper-slide span{
    font-size: 14px;
  }
  .time-line .swiper .swiper-slide.active span{
    font-size: 22px;
  }
  .history .swiper-slide .item-img{
    width: 400px;
  }
  .history .swiper-slide .item-text .t1{
    font-size: 16px;
  }
  .history .swiper-slide .item-text .t1 span{
    font-size: 42px;
  }
}
@media screen and (max-width:1024px) {
  .time-line{
    width: 93%;
    padding: 0 50px;
  }
  .time-line .swiper{
    padding-top: 60px;
    padding-bottom: 60px;
  }
  .time-line .swiper .swiper-slide::before{
    width: 12px;
    height: 12px;
  }
  .time-line .swiper .swiper-slide .active-img::after{
    width: 52px;
    height: 52px;
  }
  .time-line .swiper .swiper-slide.active span{
    bottom: 25px;
  }
  .time-line .swiper-button-next img, .time-line .swiper-button-prev img{
    width: 28px;
    height: 28px;
  }
  .history{
    width: 93%;
  }
  .history .swiper-slide .item-img{
    width: 34vw;
  }
  .history .swiper-slide .item-text .t1 span{
    font-size: 36px;
  }
  .history .swiper-slide .item-text .t2 p{
    margin-top: 18px;
  }
}
@media screen and (max-width:750px) {
  .history .swiper-slide{
    display: block;
  }
  .history .swiper-slide .item-img{
    width: 100%;
    margin-bottom: 20px;
  }
  .history .swiper-slide .item-img img{
    border-radius: 12px;
  }
  .history .swiper-slide .item-text .t1 span{
    font-size: 32px;
  }
  .history .swiper-slide .item-text .t2{
    font-size: 14px;
    margin-top: 10px;
  }
  .history .swiper-slide .item-text .t2 p{
    margin: 4px 0;
  }
}
@media screen and (max-width:640px){
  .time-line{
    width: 100%;
    padding: 0 40px;
    margin-top: 20px;
  }
  .history{
    width: 100%;
    margin-top: -10px;
  }
}

.time_wrap {
  margin: 154px 0 0 0;
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  padding: 0 240px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.change_icon {
  width: 40px;
  height: 40px;
  cursor: pointer;
}

.time_line_wrap {
  width: calc(100% - 80px);
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  padding: 0 40px;
}

.time_line2 {
  width: 100%;
  height: 0;
  border: 1px solid;
  border-image: linear-gradient(270deg, #0253c2 0%, #00c3c4 100%) 1 1;
}

.time_list {
  position: absolute;
  left: 0;
  right: 0;
  margin: 0 auto;
  width: calc(100% - 240px - 240px - 80px - 80px);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  padding: 0 35px;
  bottom: 12px;
}

.time_item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #fff;
  font-weight: 800;
  cursor: pointer;
}

.time_circle {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid #01c3c4;
  background-color: #fff;
  margin: 24px 0 0 0;
}

.year_active {
  font-size: 32px;
  transition: 0.5s;
}

.time_active {
  width: 80px;
  height: 80px;
  margin: 5px 0 -30px 0;
}

.course_content {
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  margin: 100px 240px 0 240px;
  display: flex;
  align-items: center;
}

.course_img {
  width: 564px;
  height: 353px;
  margin: 0 60px 0 0;
}

.course_content_title {
  font-size: 58px;
  color: #fff;
  font-weight: bold;
}

.course_content_title>span {
  font-size: 24px;
}

.course_content_item {
  color: #fff;
  margin: 24px 0 0 0;
  font-weight: 549;
}

.course_content_item>span {
  color: #00f0ff;
  margin: 0 32px 0 0;
}

.strength_wrap {
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  padding: 100px 0;
  background-color: #08131e;
}

.enterprise_list {
  margin: 60px 0 100px 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  padding: 0 240px;
}

.enterprise_item {
  font-size: 18px;
  color: #fff;
  text-align: center;
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  padding: 0 15px;
}

.enterprise_icon {
  width: 78px;
  height: 88px;
  margin: 0 auto 32px;
}

.honor_list {
  margin: 60px 0 0 0;
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  grid-template-columns: repeat(3, 1fr);
  grid-gap: 32px;
  padding: 0 240px;
  display: grid;
}

.honor_item {
  background-color: #fff;
  border-radius: 16px;
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  padding: 24px 0;
  text-align: center;
  font-size: 16px;
  color: #1d2129;
  font-weight: 550;
}

.honor_icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 20px;
  object-fit: contain;
}

.left {
  text-align: left;
}

.contact_wrap {
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  padding: 100px 300px;
  background: url("../../images/about/contact_bg.jpg") center center no-repeat;
  background-size: 100% 100%;
}

.contact_content {
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  margin: 60px 0 0 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.contact_header {
  font-size: 32px;
  color: #1d2129;
  font-weight: 549;
}

.contact_item {
  padding: 24px;
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  width: 517px;
  display: flex;
  align-items: center;
  background-color: #fff;
  border-radius: 12px;
  box-shadow: 0px 12px 40px 0px rgba(57, 74, 107, 0.05),
    0px 12px 40px 0px rgba(57, 74, 107, 0.05);
  margin: 0 0 32px 0;
}

.contact_item:last-of-type {
  margin-bottom: 0;
}

.contact_item_title {
  font-size: 16px;
  color: #1d2129;
}

.contact_text {
  font-size: 20px;
  color: #1d2129;
  font-weight: 600;
}

.contract_icon {
  width: 40px;
  height: 40px;
  margin: 0 12px 0 0;
}

.image_list {
  display: flex;
  align-items: center;
}

.image_item {
  margin: 0 32px 0 0;
}

.image_item:last-of-type {
  margin-right: 0;
}

.image_item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: #1d2129;
  font-weight: 550;
}

.contact_img {
  width: 190px;
  height: 190px;
  margin: 0 0 20px 0;
}

.address_wrap {
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  background-color: #fff;
  padding: 100px 0;
}

.address_list {
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  margin: 32px 0 0 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-gap: 32px;
  padding: 0 240px;
}

.address_item {
  background-color: #ffffff;
  border-radius: 12px;
  box-shadow: 0px 12px 40px 0px rgba(57, 74, 107, 0.05);
  cursor: pointer;
}

.address_img {
  width: 100%;
  height: auto;
  overflow: hidden;
  background-color: #fff;
  border-radius: 12px 12px 0 0;
}

.address_img>img {
  width: 100%;
  height: 100%;
  transform: translateX(0) scale(1);
  transition: all 0.5s;
  border-radius: 12px 12px 0 0;
}

.address_img>img:hover {
  border-radius: 12px 12px 0 0;
  transform: translateX(0) scale(1.2);
}

.location_content {
  box-sizing: border-box;
  -webkit-box-sizing: border-box;
  padding: 16px 32px;
}

.address_title {
  font-weight: 559;
  font-size: 20px;
  color: #1d2129;
}

.location_item {
  margin: 10px 0 0 0;
  display: flex;
  font-size: 14px;
  color: #868d9c;
}

.location_icon {
  width: 18px;
  height: 18px;
  margin: 4px 4px 0 0;
}

.main_mobile_img {
  display: none;
}

/* .aside-content {
  opacity: 0;
  animation: control-pointer 0.6s linear;
}

@keyframes control-pointer {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
} */

.aside-content {
  animation-duration: 0.5s;
  animation-fill-mode: both;
  animation-name: fadeInRight;
  -webkit-animation-duration: 0.5s;
  -webkit-animation-fill-mode: both;
  -webkit-animation-name: fadeInRight;
}

.nav-item {
  width: 90%;
  height: auto;
  margin: 0 auto;
}

.nav-lable {
  width: 100%;
  height: 45px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-childrens {
  width: 100%;
  height: 0px;
  overflow: hidden;
  transition: .1s ease;
  -webkit-transition: .1s ease;
  -moz-transition: .1s ease;
  -ms-transition: .1s ease;
  -o-transition: .1s ease;
}

.nav-children-item {
  width: 95%;
  height: 40px;
  line-height: 40px;
  margin: 0 auto;
  font-size: 12px;
}


@-webkit-keyframes fadeInRight {
  0% {
    opacity: 0;
    -webkit-transform: translateX(20px);
  }

  100% {
    opacity: 1;
    -webkit-transform: translateX(0);
  }
}

@keyframes fadeInRight {
  0% {
    opacity: 0;
    transform: translateX(20px);
  }

  100% {
    opacity: 1;
    transform: translateX(0);
  }
}