html {
    width: 100%;
    max-width: 1920px;
    margin: 0 auto;
  }
  
  body {
    width: 100vw;
    max-width: 1920px;
    overflow-x: hidden;
    position: relative;
    --body-padding-width: max(10px, calc(100% * 110 / 1920));
    --body-font-size-scale: 1;
    --body-nav-height: 80px;
  }
  
  body > nav {
    transform: scale(1);
    width: 100%;
    max-width: 1920px;
    height: var(--body-nav-height);
    background: #fff;
    background-clip: border-box;
    font-size: calc(23px * var(--body-font-size-scale));
    font-family: PingFang SC;
    font-weight: 400;
    color: #100f0f;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    position: fixed;
    z-index: 99;
    box-shadow: 0 0 8px 0 rgba(0, 0, 0, 0.1);
  }
  
  body > nav > a {
    position: absolute;
    left: var(--body-padding-width);
    z-index: 1;
    height: 100%;
    display: flex;
    align-items: center;
  }
  
  body > nav > a .logo {
    height: calc(100% - 20px);
    max-height: 45px;
  }
  
  body > nav > .nav-menu-icon {
    display: none;
    width: 20px;
    height: 20px;
    position: relative;
  }
  
  body > nav > .nav-menu-icon > .line {
    width: 100%;
    height: 2px;
    background-color: #e1251b;
    transition: all 0.3s linear;
    transform-origin: 0 center;
  }
  
  body > nav > .nav-menu-icon > .line_1 {
    position: absolute;
    top: -1px;
  }
  
  body > nav > .nav-menu-icon > .line_2 {
    margin: 9px 0;
  }
  
  body > nav > .nav-menu-icon > .line_3 {
    position: absolute;
    bottom: -1px;
  }
  
  body > nav > .nav-menu-icon[class~=close] ~ .nav {
    border-top: 1px solid rgba(204, 204, 204, 0.4);
    display: flex;
  }
  
  body > nav > .nav-menu-icon[class~=close] > .line_1 {
    width: 141.4%;
    transform: rotate(45deg);
  }
  
  body > nav > .nav-menu-icon[class~=close] > .line_2 {
    width: 0;
  }
  
  body > nav > .nav-menu-icon[class~=close] > .line_3 {
    width: 141.4%;
    transform: rotate(-45deg);
  }
  
  body > nav > .nav {
    flex: 1;
    height: 100%;
    position: relative;
    background: #fff;
    background-clip: border-box;
    padding-right: var(--body-padding-width);
  }
  
  body > nav > .nav > ul {
    height: 100%;
    display: flex;
    float: right;
  }
  
  body > nav > .nav > ul > li {
    height: 100%;
    padding: 0px 26px;
  }
  
  body > nav > .nav > ul > li[class~=nav-item] {
    position: relative;
  }
  
  body > nav > .nav > ul > li[class~=nav-item][class~=active] > .link, body > nav > .nav > ul > li[class~=nav-item]:hover > .link {
    font-weight: bold;
  }
  
  body > nav > .nav > ul > li[class~=nav-item]:hover > .link-box {
    transform: translate(0, 0);
  }
  
  body > nav > .nav > ul > li[class~=nav-item] > .link {
    display: inline-block;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  body > nav > .nav > ul > li[class~=nav-item] > .link-box {
    width: 100%;
    max-width: 1920px;
    height: 300px;
    background: #f7f7f7;
    position: fixed;
    top: var(--body-nav-height);
    left: 0;
    z-index: -1;
    transition: transform 0.5s ease-in-out;
    transform: translate(0, calc(-100% - var(--body-nav-height) - 10px));
  }
  
  body > nav > .nav > ul > li[class~=nav-item] > .link-box > .link-box-main {
    display: flex;
    justify-content: space-between;
    padding: 60px var(--body-padding-width);
  }
  
  body > nav > .nav > ul > li[class~=nav-item] > .link-box > .link-box-main > .list > h3 {
    font-size: 39px;
    font-family: PingFang SC;
    font-weight: 400;
    color: #100f0f;
    line-height: 37px;
  }
  
  body > nav > .nav > ul > li[class~=nav-item] > .link-box > .link-box-main > .list > ul {
    display: flex;
    flex-wrap: wrap;
    margin-top: 60px;
  }
  
  body > nav > .nav > ul > li[class~=nav-item] > .link-box > .link-box-main > .list > ul > li {
    padding: 10px 0px;
    padding-right: 30px;
    font-size: calc(18px * var(--body-font-size-scale));
    font-family: PingFang SC;
    font-weight: 400;
    color: #100f0f;
    line-height: calc(37px * var(--body-font-size-scale));
  }
  
  body > nav > .nav > ul > li[class~=nav-item] > .link-box > .link-box-main > .list > ul > li.active, body > nav > .nav > ul > li[class~=nav-item] > .link-box > .link-box-main > .list > ul > li:hover, body > nav > .nav > ul > li[class~=nav-item] > .link-box > .link-box-main > .list > ul > li > a > .dot {
    color: #d70316;
  }
  
  body > nav > .nav > ul > li[class~=nav-item] > .link-box > .link-box-main > img {
    width: 605px;
    height: 181px;
  }
  
  body > nav > .nav > ul > li[class~=lang-item] > .lang {
    height: 100%;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  body > nav > .nav > ul > li[class~=lang-item] > .lang select {
    -webkit-appearance: none;
    appearance: none;
    outline: none;
    border: none;
    width: 100%;
    max-width: 100px;
    height: 100%;
    font-size: calc(22px * var(--body-font-size-scale));
    font-family: PingFang SC;
    font-weight: 400;
    color: #101010;
    padding: 0 10px;
    text-overflow: ellipsis;
    background-color: #fff;
  }
  
  body > nav > .nav > ul > li[class~=lang-item] > .lang select:hover {
    cursor: pointer;
  }
  
  body > nav > .nav > ul > li[class~=lang-item] > .lang select > option {
    -webkit-appearance: none;
    appearance: none;
    padding: 0 10px;
  }
  
  body > nav > .nav > ul > li[class~=lang-item] > .lang > .select-wrapper {
    position: relative;
    padding-right: 10px;
  }
  
  body > nav > .nav > ul > li[class~=lang-item] > .lang > .select-wrapper > .icon {
    box-sizing: content-box;
    width: 0;
    height: 0;
    border-width: 8px 6px 0 6px;
    border-style: solid;
    border-color: #707070 rgba(0, 0, 0, 0);
    position: absolute;
    top: 50%;
    right: 0px;
    transform: translate(0, -50%);
  }
  
  body > .banner {
    width: 100%;
    height: 25rem;
    overflow: hidden;
    position: relative;
  }
  
  body > .banner > img {
    position: relative;
    left: max(-100px, -110px + var(--body-padding-width));
  }
  

  body > .block1 {
    width: 100%;
    /* height:62.25rem; */
    overflow: hidden;
    position: relative;
    padding: 0 var(--body-padding-width);
    display: flex;
    flex-direction: column;
    align-items: center;
 
  

  }
  body > .block2 {
    width: 100%;
 
    overflow: hidden;
    position: relative;
    padding: 0 var(--body-padding-width);
    display: flex;
    flex-direction: column;
    align-items: center;
 

  }
  body > .block3 {
    width: 100%;
    height:70.25rem;
    overflow: hidden;
    position: relative;
    padding: 0 var(--body-padding-width);
    display: flex;
    flex-direction: column;
    align-items: center;
 

  }
  body > .block4 {
    width: 100%;
    height:62.25rem;
    overflow: hidden;
    position: relative;
    padding: 0 var(--body-padding-width);
    display: flex;
    flex-direction: column;
    align-items: center;
 

  }

  body > .block5 {
    width: 100%;
    background: #f9fafd;
    padding: 7.875rem var(--body-padding-width);
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap-reverse;
    align-items: center;

  }

body >.block5 > .img {

    width: 41.9375rem;

}
body > .block5  > .img > img {
    width: 100%;
    -o-object-fit: contain;
    object-fit: contain;
  }
  body > .block4 >.title2 {

    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: calc(var(--body-nav-height) + 0.325rem);


 
  }
  body > .block5 >.title2 {

    width: 50%;
    display: flex;
    flex-direction: column;
 
    padding-top: calc(var(--body-nav-height) + 0.325rem);
    padding-left: 15.5rem;
  }
  body >.block5 >.title2 > span {
    font-family: PingFang SC;
    font-weight: bold;
    color: #111010;
    line-height: 1em;
    margin-bottom: 1.5rem;
  }
  body >.block5 >.title2 > span:nth-of-type(1) {
    font-size: 3.125rem;
  }
  
  body > .block5 >.title2 > span:nth-of-type(2) {
    font-size: 2.25rem;
    font-weight: unset;
  }
  body > .block5 >.title2 > span:nth-of-type(3) {
    font-weight: 400;
    font-size: 2.25rem;
    color: #404040FF;
  }


  body > .block5 >.title2 > span:nth-of-type(4) {
    font-weight: 400;
    font-size: 1.05rem;
    color: #404040FF;
  }
  body > .block5 >.title2 > .sign {
    display: block;
    width: 1.625rem;
    height: 0.25rem;
    background: #d40831;
  }

  body >.block4 >.title2 > span {
    font-family: PingFang SC;
    font-weight: bold;
    color: #111010;
    line-height: 1em;
    margin-bottom: 1.5rem;
  }
  body >.block4 >.title2 > span:nth-of-type(1) {
    font-size: 2.625rem;
  }
  
  body > .block4 >.title2 > span:nth-of-type(2) {
    font-size: 2.25rem;
  }
  body > .block4 >.title2 > .sign {
    display: block;
    width: 1.625rem;
    height: 0.25rem;
    background: #f1eced;
  }






  body >  .block2 > img{
    width: calc(100vw - var(--body-padding-width) * 2);
    /* max-width: 58.8125rem; */
   
  }
  body >  .block1 > img {
    position: absolute;
    z-index: -1;
    left: 50%;
    top: calc(50% + var(--body-nav-height));
    transform: translate(-50%, calc(-50% - var(--body-nav-height) / 2));

  }
  body >  .block3 > img {
    position: absolute;
    z-index: -1;
    left: 50%;
    top: calc(50% + var(--body-nav-height));
    transform: translate(-50%, calc(-50% - var(--body-nav-height) / 2));

  }


  
  body > .block1 >.title1 {

    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: calc(var(--body-nav-height) + 0.325rem);
  }

  body >.block1 >.title1 > span {
    font-family: PingFang SC;
    font-weight: bold;
    color: #fff;
    line-height: 1em;
    margin-bottom: 1.5rem;
  }
  body >.block1 >.title1 > span:nth-of-type(1) {
    font-size: 2.625rem;
  }
  
  body > .block1 >.title1 > span:nth-of-type(2) {
    font-size: 2.25rem;
  }
  body > .block1 >.title1 > .sign {
    display: block;
    width: 1.625rem;
    height: 0.25rem;
    background: #f1eced;
  }

  body > .block3 >.title2 {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: calc(var(--body-nav-height) + 6.1875rem);
  }


  body >.block3 >.title2 > span {
    font-family: PingFang SC;
    font-weight: bold;
    color: #252424;
    line-height: 1em;
    margin-bottom: 1.5rem;
  }
  body >.block3 >.title2 > span:nth-of-type(1) {
    font-size: 2.625rem;
  }
  
  body > .block3 >.title2 > span:nth-of-type(2) {
    font-size: 2.25rem;
  }
  body > .block3 >.title2 > .sign {
    display: block;
    width: 1.625rem;
    height: 0.25rem;
    background: #dd0832;
  }

  body > .block3 >.nav1{

    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

body > .block3 > .nav1 > li {
    flex-basis: calc(25% - 10px); 
    margin: 10px;

  }


  body > .block4 >.nav2{

    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

body > .block4 > .nav2 > li {
    flex-basis: calc(15% - 100px); 
    margin: 100px;

  }

  .center_img{
    display: flex;
    flex-direction: column;
    align-items: center;

 
  

  }
  .center_img > img{

    width: 100%;
    padding-bottom: 1%;

  }
  body > .nav {
    width: 100%;
    min-height: 5rem;
    border-bottom: 1px solid #ececec;
    padding: 0 var(--body-padding-width);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
  }
  
  body > .nav > li {
    height: 5rem;
    margin-right: 1.875rem;
    line-height: 5rem;
  }
  
  body > .nav > li > h3 {
    display: inline;
    font-size: 2.0625rem;
    font-family: Arial;
    font-weight: bold;
    color: #707070;
    line-height: 5rem;
  }
  
  body > .nav > li > .link {
    display: inline;
    border: 1px solid rgba(0, 0, 0, 0);
    padding: 0.7813rem 1.5625rem;
    border-radius: 3.125rem;
    font-size: 1.5625rem;
    font-family: PingFang SC;
    font-weight: 400;
    color: #101010;
  }
  
  body > .nav > li > .link.active, body > .nav > li > .link:hover {
    background-color: rgba(0, 0, 0, 0);
    color: #d70316;
    border: 1px solid #d70316;
  }
  
  body footer {
    width: 100%;
    min-height: 180px;
    background: #fff;
    padding: 20px var(--body-padding-width);
    display: flex;
    align-items: center;
    font-size: calc(20px * var(--body-font-size-scale));
    font-family: PingFang SC;
    font-weight: 400;
    color: #404040;
    border-top: 1px solid #ececec;
  }
  
  body footer .link:hover {
    color: #2878ff;
  }
  
  body footer .tel {
    font-size: calc(32px * var(--body-font-size-scale));
    font-family: Arial;
    font-weight: 400;
    color: #404040;
  }
  
  body footer > ul {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    padding-left: 40px;
  }
  
  body footer > ul > li {
    height: 100%;
    padding: 20px 10px;
  }
  
  body footer > ul > li > .other-link {
    display: flex;
    flex-wrap: wrap;
  }
  
  body footer > ul > li > .other-link > li {
    margin-right: 20px;
  }
  
  @media screen and (max-width: 1365px) {
    html {
      font-size: 80%;
    }
    body {
      --body-nav-height: 60px;
      --body-font-size-scale: .8;
    }
    body > nav {
      width: 100%;
      padding: 0 var(--body-padding-width);
    }
    body > nav > .nav-menu-icon {
      display: block;
    }
    body > nav > .nav {
      display: none;
      width: 100%;
      height: calc(100vh - var(--body-nav-height));
      position: fixed;
      top: var(--body-nav-height);
      left: 0;
      flex-direction: column;
      justify-content: flex-start;
      padding-bottom: 20px;
    }
    body > nav > .nav > ul {
      width: 100%;
      flex-direction: column;
      align-items: center;
      overflow-y: auto;
      padding: 0;
    }
    body > nav > .nav > ul > li {
      width: calc(100% - 60px);
      height: initial;
      padding: 0;
    }
    body > nav > .nav > ul > li[class~=nav-item] {
      padding: 18px var(--body-padding-width);
      padding-bottom: 0px;
    }
    body > nav > .nav > ul > li[class~=nav-item] > .link {
      height: initial;
      justify-content: flex-start;
      color: #d0121b;
    }
    body > nav > .nav > ul > li[class~=nav-item] > .link-box {
      display: flex;
      height: initial;
      position: relative;
      top: 0;
      left: 0;
      z-index: initial;
      transform: translate(0, 0);
      background-color: #fff;
      padding: 8px 10px;
      padding-bottom: 0px;
    }
    body > nav > .nav > ul > li[class~=nav-item] > .link-box > .link-box-main {
      padding: 0px;
      padding-bottom: 0;
    }
    body > nav > .nav > ul > li[class~=nav-item] > .link-box > .link-box-main > * {
      display: none;
    }
    body > nav > .nav > ul > li[class~=nav-item] > .link-box > .link-box-main > .list {
      display: block;
    }
    body > nav > .nav > ul > li[class~=nav-item] > .link-box > .link-box-main > .list > h3 {
      display: none;
    }
    body > nav > .nav > ul > li[class~=nav-item] > .link-box > .link-box-main > .list > ul {
      margin-top: 0;
    }
    body > nav > .nav > ul > li[class~=nav-item] > .link-box > .link-box-main > .list > ul > li {
      color: #888;
    }
    body > nav > .nav > ul > li[class~=lang-item] {
      padding: 20px 0px;
    }
    body > nav > .nav > ul > li:last-of-type {
      border-bottom: none;
    }
  }
  @media screen and (max-width: 768px) {
    html {
      font-size: 60%;
    }
    body {
      --body-nav-height: 40px;
      --body-font-size-scale: .6;
    }
    body > .banner > img {
      top: -40px;
    }
    body > .content > li > .detail {
      padding: 1.25rem 2.5rem;
    }
    body footer {
      display: flex;
      align-items: center;
      flex-direction: column;
    }
    body footer > ul {
      padding: 0;
    }


    @media screen and (max-width: 85.3125rem) {
        body >  .block3{

            height: auto;

     }
     body >  .block4{

         height: auto;

  }
        body >  .nav1 > li >  {
          width: 15rem;
          height: initial;
          padding: 0.625rem;
        }
      }
      @media screen and (max-width: 56.25rem) {
        body >  .block3{

               height: auto;

        }
        body >  .block4{

            height: auto;

     }
        body >  .nav1 > li  {
          flex-direction: row;
        }


        body > .block5 >.title2 {

    
            padding-left: 0rem;
            
            }
       
      }
      @media screen and (max-width: 30.5rem) {
        body >  .block3{

            height: auto;

     }
     body >  .block4{

         height: auto;

  }

  body > .block5 >.title2 {

    
    padding-left: 0rem;
    
    }
        /* body >  .nav1 > li  {
          width: calc((100vw - 6.25rem) / 2);
        }
        body >  .nav1 > li >  .img {
          display: none;
        } */
      }



  }