.background {
  width: 100%;
  background: url('../../assets/bjt/back-section.jpg') no-repeat;
  background-size: 100% 100%;
  overflow: hidden;
}
.container-width {
  width: 1280px;
  margin: 0 auto;
}

.introduce-top {
  width: 1200px;
  height: 360px;
  margin: 70px auto 0;
}
.introduce-top .top-left {
  width: 230px;
  height: 360px;
  float: left;
}
.introduce-top .top-left .title {
  font-size: 30px;
  color: #373332;
  text-decoration: none;
}
.introduce-top .top-left .rmb {
  display: block;
  margin-top: 40px;
  background-color: #fff;
  text-decoration-line: none;
}
.introduce-top .top-left .rmb :nth-child(1) {
  color: #939799;
  font-size: 16px;
  font-weight: bold;
}
.introduce-top .top-left .rmb :nth-child(2) {
  color: #54ab4d;
  font-size: 36px;
  font-weight: bold;
}
.introduce-top .top-left .rmb :nth-child(3) {
  color: #939799;
  font-size: 18px;
  font-weight: bold;
}
.introduce-top .top-left .rmb :nth-child(4) {
  color: #9fa0a0;
}
.introduce-top .top-left .rmb #shares-time {
  font-size: 14px;
  font-weight: 400;
}
.introduce-top .top-left img {
  width: 230px;
  height: 110px;
}
.introduce-top .top-right {
  width: 850px;
  overflow: hidden;
  float: right;
}
.introduce-top .top-right p {
  margin-top: 20px;
  color: #888585;
  line-height: 24px;
}
.introduce-top .top-right :nth-child(1) {
  margin-top: 0px;
}
.introduce-middle-top {
  width: 1200px;
  height: 535px;
  margin: 90px auto 0;
}
.introduce-middle-top .top-left {
  width: 520px;
  height: 400px;
  float: left;
  margin-top: 135px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-content: space-between;
}
.introduce-middle-top .top-left p:nth-child(1) {
  color: #dcdddd;
  font-size: 36px;
  padding-left: 26px;
}
.introduce-middle-top .top-left p:nth-child(1) span {
  position: absolute;
  display: block;
  width: 6px;
  height: 29px;
  margin: 10px 0 0 -26px;
  border-left: 6px solid #bb0007;
}
.introduce-middle-top .top-left p:nth-child(2) {
  display: block;
  color: #b5b5b6;
  font-size: 24px;
  font-weight: bold;
  margin-top: 30px;
  padding-left: 26px;
}
.introduce-middle-top .top-left p:nth-child(3) {
  color: #b5b5b6;
  font-size: 16px;
  line-height: 24px;
  padding-left: 26px;
}
.introduce-middle-top .top-left a {
  display: block;
  width: 92px;
  height: 37px;
  line-height: 37px;
  text-align: center;
  margin: 0 0 84px 26px;
  border-radius: 8px;
  color: #ffff;
  text-decoration: none;
}
.introduce-middle-top .top-left a:hover {
  color: #c00e18;
}
.introduce-middle-top .top-right {
  width: 600px;
  height: 450px;
  float: right;
  margin-top: 85px;
  background-color: #c00e18;
  text-align: center;
}
.introduce-middle-top .top-right img {
  width: 550px;
  height: 333px;
  margin-top: 117px;
}
.introduce-middle {
  width: 1200px;
  height: 437px;
  margin: 80px auto 0;
}
.introduce-middle .top-left {
  width: 304px;
  height: 437px;
  float: left;
}
.introduce-middle .top-left p:nth-child(1) {
  color: #595757;
  font-size: 36px;
}
.introduce-middle .top-left p:nth-child(1) span {
  display: block;
  float: left;
  width: 6px;
  height: 29px;
  margin: 10px 3px 0 0;
  border-left: 6px solid #bb0007;
}
.introduce-middle .top-left p:nth-child(2) {
  color: #dcdddd;
  font-size: 36px;
  font-weight: bold;
  line-height: 30px;
}
.introduce-middle .top-left img {
  width: 110px;
  height: 120px;
  margin-top: 10px;
}
.introduce-middle .top-left a {
  display: block;
  color: #898989;
  font-size: 18px;
  line-height: 24px;
  margin: 50px 0 20px 0;
  text-decoration: none;
}
.introduce-middle .top-left a:hover {
  color: red;
}
.introduce-middle .top-left i {
  color: #c00e18;
  font-size: 30px;
}
.introduce-middle .top-middle,
.introduce-middle .top-right {
  width: 428px;
  height: 437px;
  float: right;
  margin-right: 8.5px;
}
.introduce-middle .top-middle .background-img,
.introduce-middle .top-right .background-img {
  position: relative;
  width: 210px;
  height: 130px;
  float: left;
  background-size: 210px 130px;
  margin: 8px 8px 8px 0;
  text-decoration: none;
}
.introduce-middle .top-middle .background-img:nth-child(2),
.introduce-middle .top-right .background-img:nth-child(2) {
  margin-right: 0px;
}
.introduce-middle .top-middle .background-img:nth-child(4),
.introduce-middle .top-right .background-img:nth-child(4) {
  margin-right: 0px;
}
.introduce-middle .top-middle .background-img:nth-child(6),
.introduce-middle .top-right .background-img:nth-child(6) {
  margin-right: 0px;
}
.introduce-middle .top-middle .background-img .bj-img,
.introduce-middle .top-right .background-img .bj-img {
  width: 100%;
  height: 130px;
}
.introduce-middle .top-middle .background-img .img-text,
.introduce-middle .top-right .background-img .img-text {
  position: absolute;
  left: 0;
  top: 0px;
  width: 210px;
  height: 0px;
  color: #fff;
  background-color: #bb0007;
  opacity: 0.8;
  text-align: center;
  transition: height 0.2s;
}
.introduce-middle .top-middle .background-img .img-text p,
.introduce-middle .top-right .background-img .img-text p {
  display: none;
  padding-top: 50px;
}
.introduce-middle .top-middle .background-img:hover .img-text,
.introduce-middle .top-right .background-img:hover .img-text {
  width: 210px;
  height: 130px;
}
.introduce-middle .top-middle .background-img:hover .img-text p,
.introduce-middle .top-right .background-img:hover .img-text p {
  display: block;
}
.introduce-middle-bottom {
  width: 1200px;
  margin: 85px auto;
}
.introduce-middle-bottom .top-left {
  float: left;
  margin-bottom: 85px;
}
.introduce-middle-bottom .top-left .leadership-care {
  height: 127px;
  padding-left: 11px;
}
.introduce-middle-bottom .top-left .leadership-care p:nth-child(1) {
  color: #dcdddd;
  font-size: 36px;
}
.introduce-middle-bottom .top-left .leadership-care p:nth-child(1) span {
  position: absolute;
  display: block;
  width: 6px;
  height: 29px;
  margin: 10px 0 0 -11px;
  border-left: 6px solid #bb0007;
}
.introduce-middle-bottom .top-left .leadership-care p:nth-child(2) {
  color: #676767;
  font-size: 36px;
  font-weight: bold;
  line-height: 30px;
}
.introduce-middle-bottom .top-right {
  width: 594px;
  float: left;
  height: 209px;
  margin-top: 127px;
}
.introduce-middle-bottom .background-img {
  position: relative;
  width: 24%;
  margin-right: 1%;
  height: 209px;
  float: left;
  text-decoration: none;
}
.introduce-middle-bottom .background-img .bj-img {
  height: 200px;
  width: 100%;
}
.introduce-middle-bottom .background-img .img-text {
  position: absolute;
  top: 0;
  height: 0px;
  width: 0px;
  color: #dcdddd;
  background-color: #bb0007;
  opacity: 0.8;
  transition: height 0.2s;
}
.introduce-middle-bottom .background-img .img-text p {
  text-align: center;
  display: none;
  width: 246px;
  margin: auto;
  padding-top: 30%;
}
.introduce-middle-bottom .background-img:hover .img-text {
  height: 200px;
  width: 100%;
}
.introduce-middle-bottom .background-img:hover .img-text p {
  display: block;
}
.introduce-bottom {
  width: 1200px;
  height: 400px;
  margin: 90px auto 110px;
}
.introduce-bottom .bottom-left {
  width: 340px;
  height: 400px;
  float: left;
}
.introduce-bottom .bottom-left p:nth-child(1) {
  color: #595757;
  font-size: 36px;
}
.introduce-bottom .bottom-left p:nth-child(1) span {
  display: block;
  float: left;
  width: 6px;
  height: 29px;
  margin: 10px 3px 0 0;
  border-left: 6px solid #bb0007;
}
.introduce-bottom .bottom-left p:nth-child(2) {
  color: #dcdddd;
  font-size: 36px;
  font-weight: bold;
  line-height: 30px;
}
.introduce-bottom .bottom-left p:nth-child(3) {
  margin-top: 40px;
  color: #595757;
  font-size: 30px;
}
.introduce-bottom .bottom-left p:nth-child(4) {
  color: #595757;
}
.introduce-bottom .bottom-right {
  width: 860px;
  height: 400px;
  float: left;
  background-color: #97aae7;
}
.introduce-bottom .bottom-right img {
  width: 860px;
  height: 400px;
}
@media only screen and (min-width: 0px) and (max-width: 900px) {
  .about-dongri {
    margin-top: -35px !important;
  }
  .about-dongri .investor-relations {
    font-size: 15px !important;
  }
  .background {
    width: 100%;
    background: none;
    background-size: 100% 535px;
  }
  .margin-sj {
    margin-top: 20px !important;
  }
  .introduce-middle-top .top-left {
    width: 100%;
    height: 400px !important;
    background: url('../../assets/lbt/lbt-bj.webp') no-repeat;
    background-size: 100% 400px;
  }
  .introduce-middle-top .top-left :nth-child(1) {
    margin-top: 80px;
    font-size: 25px !important;
  }
  .introduce-middle-top .top-left :nth-child(1) span {
    margin: 3px 0 0 -10px !important;
  }
  .introduce-middle-top .top-left :nth-child(2) {
    margin-top: 0px !important;
    font-size: 20px !important;
  }
  .introduce-middle-top .top-left :nth-child(3) {
    font-size: 14px !important;
  }
  .introduce-middle-top .top-left a {
    margin-bottom: 20px !important;
  }
  .introduce-middle-top .top-right {
    height: 370px !important;
  }
  .introduce-middle-top .top-right img {
    margin-top: 40px;
    width: 100% !important;
  }
  .introduce-middle .top-left {
    height: 330px !important;
  }
  .introduce-middle .top-middle,
  .introduce-middle .top-right {
    height: 415px !important;
  }
  .introduce-middle .top-middle .background-img,
  .introduce-middle .top-right .background-img {
    width: 48% !important;
    margin: 1% 1% !important;
    background-size: 100% 130px;
  }
  .introduce-middle .top-middle .background-img .img-text,
  .introduce-middle .top-right .background-img .img-text {
    width: 100% !important;
    line-height: 24px !important;
    font-size: 12px !important;
  }
  .introduce-middle .top-middle .background-img:hover .img-text,
  .introduce-middle .top-right .background-img:hover .img-text {
    height: 80px !important;
    padding-top: 50px !important;
  }
  .introduce-middle .top-middle .background-img:hover .img-text p,
  .introduce-middle .top-right .background-img:hover .img-text p {
    display: block;
  }
  .introduce-middle-bottom .background-img {
    width: 48.2% !important;
    margin: 0 0.9% !important;
    background-size: 100% 100% !important;
  }
  .introduce-middle-bottom .background-img .img-text {
    width: 100% !important;
    line-height: 24px !important;
    font-size: 12px !important;
  }
  .introduce-middle-bottom .background-img .img-text p {
    width: 100% !important;
  }
  .introduce-middle-bottom .background-img img {
    width: 100%;
    height: 100%;
  }
  .introduce-middle-bottom .background-img:hover .img-text p {
    display: block;
  }
  .introduce-middle-bottom .top-left {
    margin-top: 20px !important;
  }
  .introduce-middle-bottom .top-right {
    margin-top: 10px !important;
    height: 200px !important;
  }
  .introduce-bottom {
    height: 300px !important;
  }
  .introduce-bottom .bottom-left {
    height: 250px !important;
  }
  .introduce-bottom .bottom-right {
    height: 50% !important;
    margin-bottom: 10px !important;
  }
  .introduce-bottom .bottom-right img {
    width: 100% !important;
    height: 100%;
  }
  .footer-top-external {
    height: 0px !important;
  }
  #btn5 {
    border-bottom: 2px solid #bb0007;
  }
}
@media only screen and (min-width: 0px) and (max-width: 300px) {
  .introduce-middle-top .top-left :nth-child(1) {
    margin-top: 90px;
    font-size: 20px !important;
  }
  .introduce-middle-top .top-left :nth-child(1) span {
    height: 25px!important;
  }
  .introduce-middle-top .top-left :nth-child(2) {
    margin-top: 0px !important;
    font-size: 15px !important;
  }
  .introduce-middle-top .top-left :nth-child(3) {
    font-size: 12px !important;
  }
}
@media only screen and (min-width: 500px) and (max-width: 900px) {
  .introduce-middle-top .top-right img {
    width: 100% !important;
  }
  .introduce-middle .top-right {
    margin-top: 20px !important;
  }
}