* {
    margin: 0;
    padding: 0;
  }
  
  /* web端 */
  
  .wrap {
    min-width: 1100px;
    max-width: 1920px;
    overflow: auto;
    background-color: rgb(241, 241, 242);
    margin: auto;
  }
  .section {
    width: 100%;
    margin: 0 auto;
  }
  .pic1 {
    background: url(./assets/1.jpg) center;
    height: 644px;
  }
  .pic2 {
    background: url(./assets/2.jpg) center;
    height: 684px;
  }
  .pic3 {
    background: url(./assets/3.jpg) center;
    height: 600px;
  }
  .pic4 {
    background: url(./assets/4.jpg) center;
    height: 600px;
  }
  .pic5 {
    background: url(./assets/5.jpg) center;
    height: 600px;
  }
  .header-items {
    margin: 0 auto;
    /*background-color: rgba(34, 34, 34, 0.5);*/
    position: relative;
    height: 593.3px;
    width: 1320px;
  }
  
  .cloudhubx {
    position: absolute;
    top: 137px;
  }
  .cloudhubx>img {
    max-width: 680px;
    width: 100%;
    height: 100%;
  }
  .download-bottons {
    position: absolute;
    left: 855px;
    top: 489px;
    z-index: 100;
  }
  .download-botton {
    display: block;
     /*background-color: rgba(100, 100, 100, 0.5); */
    width: 203.2px;
    float: left;
    height: 65.4px;
  }
  .download-botton:not(:first-child) {
    margin-left: 36.8px;
  }
  
  /* mac端 ---  mac.html*/
  .container{
    background-color: #fff;
  }
  .mac {
    background: url(./assets/mac_top.jpg) center;
    height: 520px;
    background-size: contain;
  }
  .mac1, .mac2, .mac3, .mac4, .mac5  {
    width: 100%;
    background: url(./assets/mac_intro1.jpg) center;
    height: 580px;
    margin-top: 40px;
    background-size: contain;
  }
  .mac2 {
    background: url(./assets/mac_intro2.jpg) center;
    background-size: contain;
  }
  .mac3 {
    background: url(./assets/mac_intro3.jpg) center;
    background-size: contain;
  }
  .mac4 {
    background: url(./assets/mac_intro4.jpg) center;
    background-size: contain;
  }
  .mac5 {
    background: url(./assets/mac_intro5.jpg) center;
    background-size: contain;
    margin-bottom: 40px;
  }
  .mac-items {
    height: 470px;
  }
  .mac-img {
    left: 100px;
  }
  .mac-botton {
    font-size: 18px;
    /* opacity: 0.5; */
    /* background: #000000; */
    background-color: rgba(0,0,0,0.5);
    border-radius: 5px;
    width: 216px;
    height: 60px;
    text-decoration: none;
    color: white;
    margin: 0 auto;
    text-align: center;
    line-height: 60px;
    top: 0px;
    top: -30px;
    margin-top: -80px;
    margin-left: -40px;
  }
  .mac-botton:hover {
    background-color: rgba(0,0,0,0.7);
  }
  .join-group {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    text-align: center;
    border-top: 1px solid #E1EAF1;
    z-index: 1;
    background: #fff;
    padding: 10px 15px;
    font-size: 15px;
    line-height: 24px;
    cursor: pointer;
  }
  .join-group .icon-container{
    float: left;
    margin-left: 45%;
    margin-top: -1px;
  }
  .join-group .icon-group {
    float: left;
    margin-left: 10px;
  }
  
  .download-mac {
    font-size: 18px;
    background-image: linear-gradient(44deg, #3B7CFF 0%, #52A8ED 100%);
    border-radius: 5px;
    width: 216px;
    height: 60px;
    text-decoration: none;
    color: white;
    margin: 0 auto;
    text-align: center;
    line-height: 60px;
    top: 0px;
    display: inline-block;
    cursor: pointer;
    margin-left: 26%;
    margin-top: 25%;
  }
  .download-mac:hover{
    opacity: 0.9
  }
  .join-group .icon-img{
    width: 20px;
    height: 20px;
    background-size: contain;
  }
  .wrap .hidden {
    display: none;
  }
  .wrap .hidden .mask {
    position: fixed;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    background-color: rgba(4, 20, 42, 0.3);
    z-index: 100;
  }
  .qr-code {
    color: #1d1d1d;
    position: fixed;
    top: 50%;
    left: 50%;
    margin: -193px 0 0 -140px;
    width: 280px;
    height: 386px;
    background: #FFFFFF;
    border-radius: 4px;
    text-align: center;
    z-index: 100;
  }
  .qr-code .header {
    height: 40px;
    line-height: 40px;
  }
  .qr-code .header .com-close {
    color: #768893;
    right: 0;
  }
  .qr-code .content .title-text {
    width: 190px;
    height: 46px;
    vertical-align: middle;
    font-size: 16px;
    font-weight: normal;
    display: inline-block;
    position: relative;
    float: left;
    left: 20px;
    line-height: 46px;
  }
  .qr-code .content .group-avatar {
    vertical-align: middle;
    display: inline-block;
    width: 46px;
    height: 46px;
    border-radius: 100%;
    background: url(assets/group-logo.png) no-repeat center center / contain;
    position: relative;
    left: 20px;
    float: left;
  }
  .qr-code .content .qr-code-img {
    width: 244px;
    height: 244px;
    margin: 0 auto;
    background-color: white;
  }
  .qr-code .content .qr-code-img img {
    padding-top: 25px;
    display: block;
    margin: 0 auto;
    width: 200px;
    height: 200px;
    background-size: cover;
  }
  .qr-code .com-close {
    cursor: pointer;
    position: absolute;
    right: 8px;
    width: 46px;
    height: 46px;
    height: 46px;
    display: inline-block;
    font-size: 25px;
  }
  .qr-code .qr-code-mobile {
    display: none;
    font-size: 14px;
  }
  .qr-code .qr-code-web {
    display: none;
    font-size: 14px;
  }
  /* mac移动端 */
  .mobile-download {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    text-align: center;
    z-index: 1;
    padding: 10px 15px;
    font-size: 15px;
    line-height: 24px;
    cursor: pointer; 
  }
  .mobile-download .mobile-download-button {
    background-image: linear-gradient(44deg, #3B7CFF 0%, #52A8ED 100%);
    box-shadow: 0 4px 6px 0 rgba(108,147,193,0.48);
    text-align: center;
    width: 6.06rem;
    height: 0.88rem;
    margin: .36rem auto;
    display: block;
    -webkit-border-radius: 1rem;
    -webkit-tap-highlight-color: rgba(255,255,255,0);
    outline: none;
    font-size: 0.36rem;
    color: #fff;
    letter-spacing: -0.48px;
    text-align: center;
    line-height: 0.88rem;
    text-decoration: none;
  }
  @media  only screen and (max-width:1440px) {
    .section {
      background-size: 1440px;
    }
    .mac {
      height: 390px;
    }
    .pic1 {
      height: 483px;      
    }
    .pic2 {
      height: 513px;
    }
    .pic3 {
      height: 450px;
    }
    .pic4 {
      height: 450px;
    }
    .pic5 {
      height: 450px;
    }
    .mac1, .mac2, .mac3, .mac4, .mac5 {
      height: 450px;
    }
    .header-items {
      width: 990px;
      height: 395px;
    }
    .cloudhubx {
      width: 600px;
      top: 103px;
    }
    .mac-img {
      /* top: 150px; */
      left: 0px;
    }
    .download-bottons {
      left: 641px;
      top: 367px;
    }
    .download-botton {
      width: 153px;
      height: 46px;
    }
    .mac-botton {
      line-height: 46px;
      margin-top: -50px;
      margin-left: -30px;
    }
    .download-botton:not(:first-child) {
      margin-left: 27.8px;
    }
    .download-mac{
     margin-left: 25%;
     margin-top: 24%;
    }
  }
  
  @media  only screen and (max-width:1366px) {
    .section {
      background-size: 1366px;
    }
    .mac {
      height: 370px; 
    }
    .pic1 {
      height: 429px;      
    }
    .pic2 {
      height: 456px;
    }
    .pic3 {
      height: 400px;
    }
    .pic4 {
      height: 400px;
    }
    .pic5 {
      height: 400px;
    }
    .mac1, .mac2, .mac3, .mac4, .mac5 {
      height: 400px;
    }
    .header-items {
      width: 938px;
      height: 395px;
    }
    .cloudhubx {
      width: 582.6px;
      height: 393px;
      top: 83px;
    }
    .mac-img {
      /* top: 120px; */
      left: 0px;
    }
    .download-bottons {
      left: 609px;
      top: 333px;
    }
    .download-botton {
      width: 145px;
      height: 46px;
    }
    .mac-botton {
      line-height: 46px;
      margin-top: -30px;
      margin-left: -30px;
    }
    .download-botton:not(:first-child) {
      margin-left: 24.8px;
    }
    .download-mac{
      margin-left: 25%;
     }
  }
  .mobile, .mac-mobile {
    display: none;
  }
  
  /* 移动端 */
  .mobile, .mac-mobile {
    width: 100%;
  }
  .mobile .page>img, .mac-mobile .page>img {
    width: 100%;
    height: 100%;
  }
  .mobile .message {
    padding: 2rem 0;
    text-align: center;
    font-size: 1.1rem;
    color: rgb(119, 136, 146);
  }
  .mobile .message strong{
    font-weight: normal;
    color: #44bbfc;
  }
  
  @media  only screen and (max-width:1024px) {
    .web{
        display: none;
    }
    .mobile{
        display: block;
    }
  }