@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
/* 视频容器 */
.video-container {
  /* position: fixed; */
  /* top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            min-width: 100%;
            min-height: 100%;
            width: auto;
            height: auto; */
  height: 100vh;
  width: 100%;
  position: absolute;
  top: 0;
  z-index: -1;
  overflow: hidden;
}
.banner_img {
  display: none;
}
/* 视频元素 */
.video-bg {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.video-cover {
  background: rgba(0, 0, 0, 0.5);
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 1;
}
main {
  position: relative;
  /* height: 100vh; */
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: white;
  text-align: center;
}
main .banner_box {
  display: flex;
  align-items: center;
  padding: 0 20px;
  width: 100%;
  height: 100vh;
}
main .banner {
  padding-top: 20vh;
  position: relative;
  width: 100%;
  height: 100%;
  max-width: 1100px;
  margin: 0 auto;
  background-color: #00000001;
}
main .banner h1 {
  text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.8);
  animation: fadeInUp 1s ease;
  font-family: 'SOURCEHANSERIFCN-HEAVY';
  font-size: 50px;
  font-weight: normal;
  font-stretch: normal;
  color: #ffffff;
}
main .banner h2 {
  margin-top: 3vh;
  text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.6);
  animation: fadeIn 1.5s ease;
  font-family: 'SOURCEHANSERIFCN-HEAVY';
  font-size: 36px;
  font-weight: normal;
  font-stretch: normal;
  color: #ffffff;
}
main .banner p {
  font-size: 16px;
  font-weight: normal;
  font-stretch: normal;
  line-height: 32px;
  color: #ffffff;
  margin-top: 2vh;
}
main .banner .time_position {
  font-size: 21px;
  font-weight: normal;
  font-stretch: normal;
  line-height: 37px;
  color: #ffffff;
  display: flex;
  justify-content: center;
  margin: 0vh auto 2vh;
}
main .banner .time_position p {
  font-size: 21px;
}
main .banner .time_position .time,
main .banner .time_position .position {
  display: flex;
  align-items: center;
}
main .banner .time {
  margin-right: 30px;
}
main .banner .time i {
  display: inline-block;
  margin-right: 6px;
  width: 21px;
  height: 21px;
  background: url(../images/time.png) no-repeat center center;
}
main .banner .position i {
  margin-right: 10px;
  display: inline-block;
  width: 16px;
  height: 23px;
  background: url(../images/position.png) no-repeat center center;
}
main .banner .btn_box {
  margin-top: 2vh;
}
main .banner .btn_box button {
  height: 44px;
  line-height: 44px;
  border-radius: 2px;
  background-color: #1b66e6;
  border: none;
}
main .banner .btn_box button a {
  display: block;
  width: 100%;
  border-radius: 2px;
  height: 100%;
  padding: 0 40px;
  font-size: 17px;
  color: #ffffff;
}
main .banner .btn_box button:hover {
  background-color: #4080f0;
}
main .banner .banner_down {
  position: absolute;
  bottom: 2vh;
  left: 50%;
  transform: translateX(-50%);
}
main .banner .banner_down i {
  cursor: pointer;
  display: block;
  width: 40px;
  height: 25px;
  background-color: #110e0f;
  background: url(../images/down.png) no-repeat center center;
}
main .section_bg {
  width: 100%;
}
main .about_bg {
  background-image: linear-gradient(90deg, #1759ff96 0%, #a550ff86 100%), linear-gradient(#f5f5f5, #f5f5f5);
  background-blend-mode: normal,
      normal;
}
main .section {
  color: #000000;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px 50px;
}
main .section .title {
  display: inline-block;
  font-family: 'SOURCEHANSERIFCN-HEAVY';
  font-size: 40px;
  line-height: 42px;
  color: #000000;
  position: relative;
  padding-top: 60px;
  margin-bottom: 55px;
}
main .section .title::after {
  content: '';
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  position: absolute;
  width: 62px;
  height: 2px;
  background-color: #1b66e6;
}
main .about_box p.text {
  text-align: left;
  font-size: 16px;
  font-weight: normal;
  font-stretch: normal;
  line-height: 32px;
  color: #000000;
  margin-bottom: 10px;
}
main .about_box .school_list {
  display: flex;
  justify-content: space-between;
  margin-top: 20px;
}
main .about_box .school_list div {
  display: flex;
  align-items: center;
  width: 12%;
}
main .about_box .school_list div.small {
  width: 9%;
}
main .about_box .school_list img {
  width: 100%;
}
main .discuss_list {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  flex-wrap: wrap;
  margin-bottom: -30px;
}
main .discuss_list .discuss_item {
  width: 22%;
  position: relative;
  border: solid 1px #dcdcdc;
  perspective: 1000px;
  margin-bottom: 30px;
}
main .discuss_list .discuss_item .card {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  padding: 25px 35px;
  font-size: 16px;
  line-height: 32px;
  align-items: center;
  backface-visibility: hidden;
  transition: all 0.6s cubic-bezier(0.23, 1, 0.32, 1);
  transform-style: preserve-3d;
}
main .discuss_list .discuss_item .black {
  z-index: 2;
  color: #000000;
}
main .discuss_list .discuss_item .white {
  top: 0;
  left: 0;
  position: absolute;
  z-index: 3;
  color: #ffffff;
  background: linear-gradient(90deg, #1758ff 0%, #a550ff 100%), linear-gradient(#1b66e6, #1b66e6);
  transform: rotateY(90deg);
  opacity: 0;
}
main .discuss_list .discuss_item:hover .white {
  opacity: 1;
  transform: rotateY(0deg);
}
main .agenda_bg {
  background: url(../images/bg1.png) no-repeat center bottom, #f5f5f5;
}
main .agenda_table table {
  width: 100%;
  border-collapse: collapse;
  font-size: 16px;
  border: none;
}
main .agenda_table table .table_header {
  background-image: linear-gradient(90deg, #1758ff 0%, #a550ff 100%), linear-gradient(#ffffff, #ffffff);
  background-blend-mode: normal,
          normal;
}
main .agenda_table table th {
  font-weight: normal;
  font-stretch: normal;
  line-height: 37px;
  color: #ffffff;
}
main .agenda_table table tr {
  background: #8cb2f326;
}
main .agenda_table table td,
main .agenda_table table th {
  border: solid 1px #1b66e6;
  text-align: center;
  height: 47px;
  line-height: 32px;
}
main .agenda_table table td div {
  padding: 0 7px;
}
main .agenda_table table td div span + span {
  margin-left: 20px;
}
main .agenda_text {
  display: none;
}
main .timeline-container {
  width: 100%;
  /* 时间轴基线 */
  /* 时间节点 */
  /* 标记点 */
  /* 文字内容 */
}
main .timeline-container .timeline {
  position: relative;
  display: flex;
  justify-content: space-between;
}
main .timeline-container .timeline::before {
  content: '';
  position: absolute;
  top: 15px;
  left: 0;
  right: 0;
  left: 16.665%;
  right: 16.665%;
  height: 1px;
  background: #aaaaaa;
  transform: translateY(-50%);
}
main .timeline-container .timeline-node {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 1;
  width: 33.33%;
}
main .timeline-container .timeline-marker {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  margin-bottom: 25px;
  background-color: #ffffff;
  padding: 10px;
  border: solid 1px #aaaaaa;
  position: relative;
}
main .timeline-container .timeline-marker::after {
  position: absolute;
  display: block;
  content: '';
  width: 12px;
  height: 12px;
  background: #1b66e6;
  border-radius: 50%;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
main .timeline-container .timeline-content {
  font-family: 'SOURCEHANSERIFCN-SEMIBOLD';
  text-align: center;
  color: #1b66e6;
}
main .timeline-container .event-title {
  font-size: 16px;
  margin-bottom: 2px;
}
main .timeline-container .event-date {
  font-family: 'SOURCEHANSERIFCN-Regular';
  color: #000000;
}
main .site_intro {
  margin-top: 50px;
  background-image: linear-gradient(90deg, #3462d61c 0%, #a550ff54 100%), linear-gradient(#1b65e63d, #1b65e661);
  display: flex;
}
main .site_intro .site_left {
  width: 50%;
  text-align: left;
  padding: 60px 50px 60px 40px;
}
main .site_intro .site_left p {
  font-size: 16px;
  line-height: 32px;
  color: #000000;
}
main .site_intro .site_left p span a {
  cursor: default;
  color: #000000;
}
main .site_intro .site_left p.site_tit {
  font-size: 26px;
  font-weight: bold;
  margin-bottom: 10px;
}
main .site_intro .site_right {
  width: 50%;
}
main .site_intro .site_right img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
main .special_bg {
  background: url(../images/bg2.png) no-repeat center top;
  background-size: cover;
}
main .special_box {
  text-align: left;
  display: flex;
  padding-bottom: 40px;
}
main .special_box .title::after {
  left: 31px;
}
main .special_box .special_left button {
  border: none;
  height: 43px;
  border-radius: 22px;
  font-size: 16px;
  background-color: #1b66e6;
}
main .special_box .special_left button a {
  display: flex;
  align-items: center;
  padding: 0 10px 0 20px;
  color: #ffffff;
  border-radius: 22px;
  height: 43px;
}
main .special_box .special_left button img {
  height: 32px;
}
main .special_box .special_left button:hover {
  background-color: #4080f0;
}
main .special_box .special_left .subtit {
  font-size: 22px;
  line-height: 32px;
  color: #1b66e6;
  margin-bottom: 8px;
  font-weight: bold;
}
main .special_box .special_left .special_txt_box {
  padding: 25px 20px;
  background-color: #1c66e61a;
  border-radius: 4px;
  color: #191919;
  margin: 15px auto 20px;
}
main .special_box .special_left .special_txt_box p {
  font-size: 16px;
  margin-bottom: 8px;
  line-height: 32px;
}
main .special_box .special_right {
  padding-top: 90px;
  padding-left: 45px;
}
@media screen and (max-width: 1280px) {
  main .banner h1 {
    font-size: 36px;
  }
  main .banner h2 {
    font-size: 26px;
  }
  main .banner .banner_down {
    bottom: 1vh;
  }
}
@media screen and (max-width: 1024px) {
  main .site_intro {
    display: block;
  }
  main .site_intro .site_left {
    padding: 60px 20px 30px 20px;
  }
  main .site_intro .site_left,
  main .site_intro .site_right {
    width: 100%;
  }
  main .special_box {
    display: block;
  }
  main .special_box .special_right {
    width: 100%;
    text-align: center;
    padding-top: 30px;
    padding-left: 0;
  }
  main .special_box .special_right img {
    width: 100%;
  }
}
@media screen and (max-width: 850px) {
  header .header_big .header_left .nav li {
    display: none;
  }
  header .header_big .header_left .nav li.Home {
    display: block;
  }
  header .header_big .header_right li.menu-btn {
    display: flex;
  }
  main .banner {
    padding-top: 15vh;
  }
  main .banner h1 {
    font-size: 34px;
  }
  main .banner h2 {
    font-size: 28px;
  }
  main .banner .banner_down {
    bottom: 2vh;
  }
  main .about_box .school_list {
    flex-wrap: wrap;
  }
  main .about_box .school_list div {
    width: 30%;
    margin-bottom: 20px;
  }
  main .about_box .school_list div.small {
    width: 25%;
  }
}
@media screen and (max-width: 768px) {
  main .discuss_list .discuss_item {
    width: 48%;
  }
  .video-bg {
    display: none;
  }
  .banner_img {
    display: block;
    width: 100%;
    height: 100%;
  }
  .tn-person-r .ecp_tn-title .ecp_tn-tab i,
  .tn-person-r .tn-user i {
    padding: 0 10px !important;
  }
  header .header_big .header_right > li a {
    padding: 0 10px;
  }
  header .header_big .header_right > li {
    margin: 0 5px;
  }
  header .header_big .header_right .nav li {
    margin: 8px;
  }
  main .section .title {
    font-size: 8vw;
  }
  main .agenda_table {
    display: none;
  }
  main .agenda_text {
    display: block;
    text-align: left;
  }
  main .agenda_text .agenda_title {
    padding: 0 20px;
    height: 40px;
    line-height: 40px;
    font-size: 18px;
    font-weight: bold;
    color: #ffffff;
    background-image: linear-gradient(90deg, #1758ff 0%, #a550ff 100%), linear-gradient(#ffffff, #ffffff);
    background-blend-mode: normal,
          normal;
  }
  main .agenda_text .agenda_info {
    padding: 20px;
    background-color: #8cb2f326;
  }
  main .agenda_text .agenda_info p {
    line-height: 32px;
  }
  main .agenda_text .agenda_info p.info-tit {
    font-weight: bold;
  }
}
@media screen and (max-width: 600px) {
  main .banner h1 {
    font-size: 5vw;
  }
  main .banner h2 {
    font-size: 4vw;
  }
  main .banner p {
    line-height: 32px;
    font-size: 3vw;
  }
  main .banner .time_position {
    line-height: 30px;
  }
  main .banner .time_position p {
    line-height: 30px;
    font-size: 4vw;
  }
  main .banner .btn_box {
    margin-top: 4vh;
  }
}