.nav-box {
  position: relative;
  z-index: 100;
  height: 78px;
  background: #f3f3f3;
}

.nav-box .nav-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 21px;
}

.nav-box .nav-bar .icon {
  width: 16px;
  height: 16px;
  margin-right: 18px;
}

.nav-box .nav-bar .text {
  font-weight: 400;
  font-size: 14px;
  color: #3d3d3d;
  line-height: 14px;
}

.nav-box .nav-wrapper {
  width: 1200px;
  height: 100px;
  display: flex;
  align-items: center;
  margin: 0 auto;
  justify-content: space-between;
  background: #ffffff;
}

.nav-box .nav-wrapper .logo-box {
  display: flex;
  align-items: center;
}

.nav-box .nav-wrapper .logo-box .logo {
  width: 68px;
  height: 68px;
  margin-right: 29px;
}

.nav-box .nav-wrapper .logo-box .title-box .title {
  font-weight: 400;
  font-size: 16px;
  color: #000000;
  line-height: 22px;
}

.nav-box .nav-wrapper .logo-box .title-box .desc {
  font-weight: 400;
  font-size: 9px;
  color: #000000;
}

.nav-box .nav-wrapper .nav-list {
  display: flex;
  align-items: center;
  gap: 42px;
}

.nav-box .nav-wrapper .nav-list ul {
  display: flex;
  align-items: center;
  gap: 42px;
}

.nav-box .nav-wrapper .nav-list ul li {
  font-weight: bold;
  font-size: 18px;
  color: #000000;
  line-height: 36px;
}

.nav-box .nav-wrapper .nav-list ul li.active {
  color: #99cd00;
}

.nav-box .nav-wrapper .nav-list .down-box {
  display: flex;
  align-items: center;
  margin-right: 60px;
  gap: 8px;
  cursor: pointer;
}

.nav-box .nav-wrapper .nav-list .down-box img {
  width: 24px;
  height: 24px;
}

.footer-box {
  box-sizing: border-box;
  height: 762px;
  padding-top: 200px;
  position: relative;
}

.footer-box::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 381px;
  background: url("../images/footer1.png") no-repeat center center;
  background-size: cover;
  z-index: -1;
}

.footer-box::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 381px;
  background: url("../images/footer7.png") no-repeat center center;
  background-size: cover;
  z-index: -1;
}

.footer-box .inner-box {
  box-sizing: border-box;
  z-index: 100;
  position: relative;
  width: 1200px;
  margin: 0 auto 0;
}

.footer-box .inner-box .inner {
  padding: 46px 30px 61px 23px;
  background: #ffffff;
}

.footer-box .inner-box .inner .wrapper {
  display: flex;
  justify-content: space-between;
}

.footer-box .inner-box .inner .wrapper .left .logo-box {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-left: 37px;
  padding-bottom: 46px;
}

.footer-box .inner-box .inner .wrapper .left .logo-box img {
  width: 87px;
  height: 93px;
}

.footer-box .inner-box .inner .wrapper .left .logo-box .title {
  font-weight: bold;
  font-size: 22px;
  color: #000000;
  line-height: 31px;
}

.footer-box .inner-box .inner .wrapper .left .logo-box .desc {
  font-weight: bold;
  font-size: 12px;
  color: #000000;
  line-height: 17px;
}

.footer-box .inner-box .inner .wrapper .left ul {
  display: flex;
  gap: 92px;
  padding-top: 22px;
  border-top: 1px solid #253550;
}

.footer-box .inner-box .inner .wrapper .left ul li {
  font-weight: 400;
  font-size: 18px;
  color: #000000;
  line-height: 28px;
}

.footer-box .inner-box .inner .wrapper .left ul li.active {
  color: #99cd00;
}

.footer-box .inner-box .inner .wrapper .right {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.footer-box .inner-box .inner .wrapper .right .title {
  font-weight: bold;
  font-size: 30px;
  color: #000000;
  line-height: 19px;
}

.footer-box .inner-box .inner .wrapper .right .desc {
  margin-top: 16px;
  margin-bottom: 42px;
  font-weight: 400;
  font-size: 18px;
  color: #000000;
  line-height: 19px;
}

.footer-box .inner-box .inner .wrapper .right .img {
  width: 100px;
  height: 100px;
}

.footer-box .inner-box .inner .list-box {
  display: flex;
  gap: 125px;
  margin-top: 97px;
  padding: 0 96px;
  white-space: nowrap;
}

.footer-box .inner-box .inner .list-box .item {
  display: flex;
  align-items: center;
  gap: 20px;
}

.footer-box .inner-box .inner .list-box .item img {
  width: 25px;
  height: 25px;
}

.footer-box .inner-box .inner .list-box .item span {
  font-weight: 400;
  font-size: 20px;
  color: #000000;
  line-height: 22px;
}

.footer-box .inner-box .bei {
  padding: 33px 0 0;
  font-weight: 400;
  font-size: 16px;
  color: #000000;
  line-height: 38px;
  text-align: center;
}

.banner {
  width: 100%;
  height: 482px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: url("../images/introduce0.png") no-repeat center center;
  background-size: cover;
}

.banner .title {
  margin-bottom: 20px;
  font-family: Microsoft YaHei
  /* font-family: ShiShangZhongHeiJianTi, ShiShangZhongHeiJianTi;  使用默认字体*/
  font-weight: 400;
  font-size: 40px;
  color: #000000;
  line-height: 40px;
}

.banner .desc {
  font-weight: 200;
  font-size: 35px;
  color: #000000;
  line-height: 66px;
  font-family: 'generaaltlight-alegd';
  text-stroke: 1px #000000;
  text-align: center;
  -webkit-text-stroke: 1px #000000;
}

.block-box .inner {
  z-index: 100;
  position: relative;
  width: 1200px;
  margin: 0 auto;
  background: #ffffff;
}

.block-box .inner .block-bar {
  position: relative;
  padding: 0 103px 0 50px;
  display: flex;
  justify-content: space-between;
}

.block-box .inner .block-bar .left {
  margin: 0 0 0 75px;
}

.block-box .inner .block-bar .left .round {
  z-index: -1;
  position: absolute;
  left: 71px;
  top: -15px;
  width: 98px;
  height: 98px;
  background: rgba(191, 255, 0, 0.3);
  border-radius: 52px 52px 52px 52px;
}

.block-box .inner .block-bar .left .en {
  font-weight: 400;
  font-size: 20px;
  color: #000000;
  line-height: 42px;
  letter-spacing: 1px;
}

.block-box .inner .block-bar .left .title {
  font-weight: 400;
  font-size: 35px;
  color: #3d3d3d;
  line-height: 42px;
  letter-spacing: 6px;
  white-space: nowrap;
}

.block-box .inner .block-bar .left .desc {
  margin-top: 23px;
  font-weight: 400;
  font-size: 16px;
  color: #3d3d3d;
  line-height: 14px;
  letter-spacing: 7px;
}

.block-box .inner .block-bar .right {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.block-box .inner .block-bar .right .icon {
  width: 75px;
  height: 75px;
  margin-bottom: 13px;
}

.block-box .inner .block-bar .right .text {
  font-weight: bold;
  font-size: 16px;
  color: #000000;
  line-height: 14px;
}

.block-box.one {
  height: 780px;
  background: url("../images/introduce8.png") no-repeat center center;
  background-size: 100% 100%;
}

.block-box.one .inner {
  box-sizing: border-box;
  display: flex;
  padding: 84px 104px 126px 0;
  position: relative;
  top: -80px;
}

.block-box.one .left-box .content-box {
  box-sizing: border-box;
  margin-top: 84px;
  padding-left: 125px;
  width: 596px;
  font-weight: 400;
  font-size: 18px;
  color: #000000;
  line-height: 39px;
  letter-spacing: 1px;
  text-align: justify;
}

.block-box.one .left-box .content-box p {
  text-indent: 42px;
}

.block-box.one .left-box .block-bar .left .title span {
  font-size: 14px;
}

.block-box.one .right {
  width: 417px;
  height: 561px;
}

.block-box.two {
  height: 1110px;
}

.block-box.two .inner {
  margin-top: 137px;
}

.block-box.two ul {
  display: flex;
  gap: 80px;
  margin-top: 50px;
}

.block-box.two ul li {
  flex: 1;
  padding: 20px 20px 32px;
  background: #f6f6f6;
}

.block-box.two ul li img {
  width: 294px;
  height: 182px;
  margin-bottom: 27px;
}

.block-box.two ul li p {
  font-weight: 400;
  font-size: 16px;
  color: #3d3d3d;
  line-height: 16px;
  letter-spacing: 1px;
  text-align: center;
}

.block-box.two .content-box {
  display: flex;
  padding: 0 0 40px 0;
  margin-top: 119px;
  background-color: #ffffff;
}

.block-box.two .content-box .img {
  flex: 0 0 480px;
  height: 382px;
  margin-right: 87px;
  box-shadow: -10px -10px 0 0px #bfff00;
}

.block-box.two .content-box .content {
  margin-top: 34px;
  text-align: justify;
}

.block-box.two .content-box .content .title {
  margin-bottom: 33px;
  font-weight: 400;
  font-size: 30px;
  color: #3d3d3d;
  line-height: 39px;
  letter-spacing: 3px;
}

.block-box.two .content-box .content .text {
  font-weight: 400;
  font-size: 18px;
  color: #000000;
  line-height: 31px;
  letter-spacing: 1px;
  text-indent: 42px;
  text-align: justify;
}

.block-box.two .size {
  height: 98px;
}

.block-box.three {
  height: 794px;
}

.block-box.three .inner {
  padding-top: 137px;
}

.block-box.three .inner .content-box {
  display: flex;
  margin-top: 57px;
  padding: 0 66px 0 49px;
}

.block-box.three .inner .content-box .img {
  width: 376px;
  height: 455px;
  margin-right: 100px;
}

.block-box.three .inner .content-box .content {
  font-weight: 400;
  font-size: 20px;
  color: #000000;
  line-height: 39px;
  text-align: justify;
  text-indent: 42px;
}

.block-box.three .inner .content-box .content .text {
  margin-top: 83px;
}

.block-box.four {
  box-sizing: border-box;
  height: 859px;
  padding-top: 157px;
  position: relative;
}

.block-box.four::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 516px;
  background: url("../images/introduce10.png") no-repeat center center;
  background-size: cover;
  z-index: -1;
}

.block-box.four::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 343px;
  background: url("../images/introduce11.png") no-repeat center center;
  background-size: cover;
  z-index: -1;
}

.block-box.four .inner {
  display: flex;
  padding: 83px 66px 82px 65px;
}

.block-box.four .inner .left {
  padding-right: 78px;
}

.block-box.four .inner .left .title {
  margin-bottom: 37px;
  font-weight: 400;
  font-size: 30px;
  color: #3d3d3d;
  line-height: 39px;
  letter-spacing: 3px;
}

.block-box.four .inner .left p {
  font-weight: 400;
  font-size: 18px;
  color: #000000;
  line-height: 39px;
  text-align: justify;
  text-indent: 42px;
}

.block-box.four .inner img {
  width: 332px;
  height: 415px;
}