.group {
  padding-bottom: 68px;
  background-size: cover;
  background-image: url(../img/about/about_bg.png);
}
.group .common_title {
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
}
.group .common_title div:after {
  margin-left: auto;
  margin-right: auto;
}
.group .group_con {
  color: rgb(45, 45, 45);
  line-height: 30px;
  margin: 45px 0 24px;
  text-align: justify;
}
.group .video {
  position: relative;
}
.group .play {
  position: absolute;
  top: 50%;
  left: 50%;
  -webkit-transform: translate(-50%, -50%);
      -ms-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  cursor: pointer;
  z-index: 2;
}
.group video {
  width: 100%;
}

.chairman {
  padding: 74px 0 70px;
  background-size: cover;
  background-image: url(../img/about/chairman_bg.png);
}
.chairman .chairman_con {
  background: white;
  margin-top: 45px;
  padding: 56px 56px 112px;
  position: relative;
}
.chairman .chairman_txt {
  width: 56%;
}
.chairman .chairman_des {
  line-height: 30px;
  text-align: justify;
}
.chairman .chairman_list {
  margin-top: 24px;
}
.chairman li {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  margin-bottom: 24px;
}
.chairman .chairman_time {
  width: 200px;
}
.chairman .chairman_tit {
  width: calc(100% - 232px);
}
.chairman .chairman_img {
  position: absolute;
  bottom: 0;
  right: 39px;
  width: 35.76%;
}
.chairman .chairman_img img {
  max-width: 100%;
}

.history {
  overflow: hidden;
  padding: 65px 0;
}
.history .wrap {
  position: relative;
}
.history .wrap::after {
  content: "";
  display: block;
  right: 0;
  top: 50%;
  -webkit-transform: translateY(-50%);
      -ms-transform: translateY(-50%);
          transform: translateY(-50%);
  width: 1px;
  height: 200%;
  background: rgb(229, 229, 229);
  position: absolute;
}
.history .history_flx {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
}
.history .history_one {
  font-weight: bold;
  width: 260px;
}
.history .history_two {
  width: 59%;
  margin-left: 14%;
  margin-top: 15px;
}
.history .history_thr {
  width: 60px;
}
.history .sw_c {
  height: 570px;
}
.history .number {
  font-weight: bold;
  color: rgb(224, 26, 33);
  margin-right: 5px;
  line-height: 1;
}
.history .num_flx {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  margin-bottom: 35px;
}
.history .num_flx > div:first-child {
  margin-right: 175px;
}
.history .history_des {
  line-height: 30px;
  height: 366px;
}
.history .history_des p {
  margin-bottom: 12px;
}
.history .history_des p:last-child {
  margin-bottom: 0;
}
.history .history_des:hover .mCSB_scrollTools .mCSB_dragger .mCSB_dragger_bar {
  opacity: 1;
}
.history .number_des {
  margin-top: 5px;
}
.history .sw_a {
  margin-top: 56px;
}
.history .sw_c .swiper-slide {
  color: rgba(45, 45, 45, 0.4);
  cursor: pointer;
}
.history .sw_c .swiper-slide-thumb-active {
  color: rgb(224, 26, 33);
  font-size: 18px;
  border-right: 2px solid rgb(224, 26, 33);
}
.history .sw_b {
  height: 570px;
}
.history .mCSB_scrollTools .mCSB_draggerRail {
  display: none;
}
.history .mCSB_scrollTools .mCSB_dragger .mCSB_dragger_bar {
  background: rgb(224, 26, 33) !important;
  -webkit-transition: all 0.5s;
  transition: all 0.5s;
  opacity: 0;
}

.thr {
  background-size: cover;
  background-image: url(../img/about/bg.jpg);
  padding: 82px 0;
}
.thr .thr_flx {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
}
.thr .thr_flx a {
    transition: all 0.5s;
  height: 157px;
  width: calc((100% - 32px) / 3);
  padding: 0 80px;
  margin-right: 16px;
  background: white;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
}
.thr .thr_flx a:nth-child(3n) {
  margin-right: 0;
}
.thr .thr_flx a:hover{
    color: #E01A21;
}
.thr .thr_flx a:hover .ico1 {
  opacity: 0;
}
.thr .thr_flx a:hover .ico2 {
  opacity: 1;
}
.thr .thr_tit {
  font-weight: bold;
}
.thr .icon_flx {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  margin-top: 10px;
}
.thr .icon {
  width: 26px;
  height: 10px;
  position: relative;
}
.thr .icon img {
  -webkit-transition: all 0.5s;
  transition: all 0.5s;
  position: absolute;
  top: 0;
  left: 0;
}
.thr .icon .ico2 {
  opacity: 0;
}

.idea {
  background-size: cover;
  background-image: url(../img/about/idea_bg.png);
  padding: 70px 0;
}
.idea .idea_flx {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
}
.idea .idea_sum {
  line-height: 30px;
  margin-top: 43px;
}
.idea .idea_r {
  width: 66.38%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
}
.idea .idea_r a {
  margin-bottom: 16px;
  width: calc((100% - 16px) / 2);
  border: 1px solid #E5E5E5;
  height: 214px;
  padding: 42px;
  position: relative;
  -webkit-transition: all 0.5s;
  transition: all 0.5s;
  background: rgba(255, 255, 255, 0.8);
}
.idea .idea_r a:hover {
  border-color: rgb(224, 26, 33);
}
.idea .idea_r a:hover .idea_tit {
  color: rgb(224, 26, 33);
}
.idea .idea_r a:hover .idea_des {
  color: rgb(224, 26, 33);
}
.idea .idea_r a:hover .more1 {
  opacity: 0;
}
.idea .idea_r a:hover .more2 {
  opacity: 1;
}
.idea .idea_tit {
  margin-bottom: 16px;
  line-height: 24px;
  -webkit-transition: all 0.5s;
  transition: all 0.5s;
  font-weight: bold;
}
.idea .idea_des {
  -webkit-transition: all 0.5s;
  transition: all 0.5s;
}
.idea .time_flx {
  position: absolute;
  left: 42px;
  bottom: 42px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  width: calc(100% - 84px);
}
.idea .time_l {
  color: rgba(45, 45, 45, 0.6);
}
.idea .time_r {
  width: 26px;
  height: 10px;
  position: relative;
}
.idea .time_r img {
  -webkit-transition: all 0.5s;
  transition: all 0.5s;
  position: absolute;
  top: 0;
  left: 0;
}
.idea .time_r .more2 {
  opacity: 0;
}

@media only screen and (max-width: 1600px) {
  .group .group_con {
    margin: 25px 0;
  }
  .chairman .chairman_con {
    margin-top: 30px;
    padding: 30px 30px 40px;
  }
  .chairman li {
    margin-bottom: 15px;
  }
  .history .sw_a {
    margin-top: 30px;
  }
  .history .num_flx {
    margin-bottom: 20px;
  }
  .history .history_des p {
    margin-bottom: 6px;
  }
  .history .history_two {
    margin-left: 5%;
  }
  .history .sw_c {
    height: 450px;
  }
  .history .history_des {
    height: 282px;
  }
  .history .sw_b {
    height: 430px;
  }
  .thr .thr_flx a {
    height: 140px;
    padding: 0 30px;
  }
  .idea .idea_r a {
    padding: 30px;
  }
  .idea .time_flx {
    left: 32px;
    bottom: 32px;
    width: calc(100% - 64px);
  }
  .idea .idea_sum {
    margin-top: 25px;
  }
  .thr .icon_flx {
    margin-top: 5px;
  }
  .idea .idea_tit {
    margin-bottom: 8px;
  }
  .history .num_flx > div:first-child {
    margin-right: 100px;
  }
}
@media only screen and (max-width: 768px) {
  .group {
    padding-bottom: 40px;
  }
  .chairman {
    padding: 40px 0;
  }
  .chairman .chairman_txt {
    width: 100%;
  }
  .chairman li {
    display: block;
    margin-bottom: 10px;
  }
  .chairman .chairman_time {
    width: 100%;
  }
  .chairman .chairman_tit {
    width: 100%;
    margin-top: 5px;
  }
  .chairman .chairman_img {
    position: relative;
    text-align: right;
    right: 0;
    margin-left: auto;
  }
  .chairman .chairman_con {
    padding-bottom: 0;
  }
  .history {
    padding: 40px 0;
  }
  .history .history_flx {
    display: block;
  }
  .history .history_one {
    width: 100%;
  }
  .history .history_two {
    margin-left: 0;
    width: 100%;
  }
  .history .wrap::after {
    height: 1px;
    width: 150%;
    top: inherit;
    bottom: 0;
    left: 50%;
    -webkit-transform: translateX(-50%);
        -ms-transform: translateX(-50%);
            transform: translateX(-50%);
  }
  .history .sw_c {
    height: auto;
  }
  .history .history_thr {
    width: 100%;
    margin-top: 20px;
  }
  .history .sw_c .swiper-slide {
    text-align: center;
  }
  .history .sw_c .swiper-slide-thumb-active {
    border-right: none;
    font-size: inherit;
    font-weight: bold;
    border-bottom: 2px solid rgb(224, 26, 33);
  }
  .history .sw_b {
    height: auto;
  }
  .thr {
    padding: 40px 0;
  }
  .thr .thr_flx a {
    width: 100%;
    margin-right: 0;
    margin-bottom: 10px;
    padding: 0 20px;
    height: 100px;
  }
  .thr .icon_flx {
    margin-top: 0px;
  }
  .idea {
    padding: 40px 0;
  }
  .idea .idea_flx {
    display: block;
  }
  .idea .idea_r {
    width: 100%;
    margin-top: 20px;
  }
  .idea .idea_r a {
    padding: 20px;
    width: 100%;
    margin-bottom: 10px;
    height: 160px;
  }
  .idea .time_flx {
    left: 20px;
    bottom: 20px;
    width: calc(100% - 40px);
  }
  .idea .idea_r a:last-child {
    margin-bottom: 0;
  }
  .common_title {
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
  }
  .common_title > div::after {
    margin-left: auto;
    margin-right: auto;
  }
  .group .group_con {
    margin: 20px 0;
  }
  .sw_a .swiper-slide {
    text-align: center;
  }
  .history .sw_a {
    margin-top: 15px;
  }
  .idea .idea_sum {
    text-align: center;
    margin-top: 20px;
  }
}