.banner{
    height: 360px;
  }
  .banner img{
    display: block;
    height: 100%;
  }
  .flexC {
    display: flex;
    justify-content: center;
  }
  
  .box {
    max-width: 1200px;
  }
  
  .hide {
    display: none;
  }
  
  /* 左侧导航栏 */
  .about_left {
    display: inline-block;
    width: 180px;
    height: auto!important;
    background-color: #fff;
    z-index: 8;
    position: relative;
    top: 10px;
    margin-top: 40px!important;
  }
  .right {
    position: relative;
    top: 0;
  }
  .about_left .menuItem {
    display: inline-block;
    width: 180px;
    height: 47px;
    font-size: 14px;
    font-family: PingFangSC-Medium, PingFang SC;
    font-weight: 500;
    text-align: center;
    line-height: 47px;
    cursor: pointer;
    text-align: left;
    padding-left: 20px;
    border-bottom: 1px solid #F8F8F8;
  }
  .menuItem a {
    color: #666666 !important;
  }
  
  .menuItem.active{
    background: #DD2C1F;
    color: #fff;
  }
  .content {
    width: 1035px;
    min-height: 90vh;
    padding-left: 108px;
  }
  .content1 {
    padding-left: 108px !important;
  }
  .service-img{
    width: 100%;
    margin-bottom: 60px;
  }
  .sec-title{
    margin-top: 50px;
    font-size: 24px;
    font-family: PingFangSC-Semibold, PingFang SC;
    font-weight: 600;
    line-height: 33px;
    color: #000000;
    padding: 8px;
    border-left: 5px solid #DD2C1F;
  }
  .click-btn{
    display: block;
    width: 120px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    background: #DD2C1F;
    border-radius: 5px;
    color: #fff;
    margin-top: 30px;
  }
  .file-box{
    padding: 20px 0;
    margin-bottom: 100px;
  }
  .file-box .h1{
    font-weight: bold;
    font-size: 18px;
    margin-top: 20px;
  }
  .file-box .h2{
    font-weight: bold;
    font-size: 14px;
    margin: 10px 0;
  }
  .file-box span{
    display: block;
    line-height: 1.8;
    font-size: 14px;
    margin-left: 20px;
  }
  .file-box .fc-pic{
    display: block;
    width: 750px;
    margin-top: 50px;
  }
  .mt{
    margin-top: 20px;
  }