.about_part1,.about_part2,.about_part4{
      width: 1200px;
      margin:0 auto;
      margin-top:30px;
  }
  .about_title{
    height: 130px;
    line-height: 130px;
    font-size: 32px;
    color: #fff;
    text-align: center;
   }
    /* 1 */
  .part1_img{
    margin: 0 auto;
    overflow: hidden;
    position: relative;
  }
  .part1_img img{
    transition: all 1s;
  }
  .part1_img img:hover{
    transform: scale(1.1);
  }
  .about_part1 .part1_img .move1_pc{
    display: none;
  }
  .part1_img p{
    position: absolute;
    bottom: 0;
    width: 966px;
    left:115px;
    font-size: 18px;
    color: #333333 ;
    bottom:46px;
    line-height:29px ;
  }
  /* 2 */
  .about_part2{
    display: flex;
    justify-content: space-between;
  }
  .part2_wrap{
    width: 49%;
  }
  .part2_info{
    height: 130px;
    text-align: center;
    background-color: #F6F7F9;
  }
  .part2_info .title{
    font-size: 24px;
    font-weight: bold;
    padding-top: 30px;
  }
  .part2_info p{
    font-size: 18px;
    padding-top: 18px;
  }
  /* 3 */
  .about_part3{
    background:url('../../images/cid/bg.png');
    width: 100%;
    /* height: 990px; */
    padding-bottom:60px;
  }
  .about_title{
    height: 100px;
    line-height: 100px;
  }
  .about_part3 .about_part3_wrap{
    width: 1200px;
    margin: 0 auto;
  }
  .part3_info{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
  }
  .part3_info .part3_list{
    width:calc(50% - 80px);
    display: flex;
    align-items: center;
    background-color: #fff;
    padding:20px 30px;
    box-sizing: border-box;
    margin-top: 20px;
  }
  .part3_info .part3_list:last-child{
    width:100%;
  }
  .part3_info .list_img{
    width: 48px;
    height: 48px;
    padding-right: 20px;
  }
  .part3_info .list_info .title{
    font-size:24px;
    padding-bottom: 20px;
    /* padding-top: 10px; */
  }
  .part3_info .list_info .title{
    font-size:18px;
  }
  .map{
    width: 1200px;
    height: 400px;
    margin: 0 auto;
  }
  /* 4 */
  .about_part4{
    margin-top: 0;
  }
  .about_part4 .about_title{
    color:#333333;
  }
  .about_part4_wrap{
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
  }
  .part4_list{
    width:32% ;
    background: #F6F7F9 ;
    padding: 40px;
    box-sizing: border-box;
    margin-bottom: 20px;
  }
  .part4_list_title{
    display: flex;
    align-items: center;
  }
  .part4_list_title .part4_img{
    width: 36px;
    height: 36px;
  }
  .part4_list_title p{
    font-size: 24px;
    font-weight: bold;
    margin-left: 20px;
  }
  .part4_list_info{
    padding:30px 0;
  }
  .part4_list_info p{
    font-size:14px;
    color: #666666;
    line-height:32px;
  }
  .part4_list_link{
    width: 140px;
    height: 48px;
    border: 1px solid #1790FF;
    text-align: center;
    line-height: 48px;
    border-radius: 4px;
  }
  .part4_list_link a{
    color: #1790FF;
    font-size: 14px;
  }
  @media screen and (max-width: 768px) {
    .about_part1,.about_part2{
        width: 100%;
        margin-top:30px;
    }
    .about_part1 .part1_img .part1_pc{
      display: none;
    }
    .about_part1 .part1_img .move1_pc{
        display: block;
      }
    .part1_img p{
      bottom: 0;
      width: calc(100% - 40px);
      left:20px;
      right: 0;
      font-size: 28px;
      bottom:30px;
      line-height:32px ;
      box-sizing: border-box;
    }
    /* 3 */
    .about_part3{
      width: 100%;
      height: auto;
    }
    .about_part3 .about_part3_wrap{
      width: 100%;
    }
    .part3_info .part3_list{
      width:calc(100% - 40px);
      margin-left: 20px;
    }
    .part3_info .part3_list:last-child{
      width:calc(100% - 40px);
      margin-bottom: 20px;
    }
    .part3_info .list_info .title{
      font-size:32px;
      padding-bottom: 24px;
      padding-top: 8px;
    }
    .part3_info .list_info p{
      font-size:28px;
    }
    .map{
      width:calc(100% - 40px);
      height: 360px;
      margin: 0 auto;
    }
    /* 4 */
    .about_part4{
      width: calc(100% - 40px);
    }
    .part4_list{
      width:calc(50% - 10px);
      padding: 20px;
    }
    .part4_list_title p{
      font-size: 32px;
      font-weight: bold;
    }
    .part4_list_info p{
      font-size:24px;
      line-height:38px;
    }
    .part4_list_link{
      width: 160px;
      height: 56px;
      line-height: 56px;
    }
    .part4_list_link a{
      font-size: 28px;
    }
  } 
  
  @media screen and (max-width: 499px) { 
    .about_part1,.about_part2{
      width: 100%;
      margin-top:20px;
    }
    .part1_img p{
        bottom: 0;
        width: calc(100% - 40px);
        left:20px;
        font-size: 14px;;
        bottom:10px;
        line-height:22px ;
        box-sizing: border-box;
      }
      /* 2 */
      .part2_info{
        height: 70px;
      }
      .part2_info .title{
        font-size: 16px;
        padding-top: 15px;
      }
      .part2_info p{
        font-size: 12px;
        padding-top: 9px;
      }
      /* 3 */
      .about_title{
        height: 60px;
        line-height: 60px;
        font-size: 18px;
      }
      .part3_info .part3_list{
        width:calc(100% - 20px);
        margin-left: 10px;
        margin-top: 10px;
      }
      .part3_info .part3_list:last-child{
        width:calc(100% - 20px);
        margin-bottom: 10px;
      }
      .part3_info .list_img{
        width: 24px;
        height: 24px;
        padding-right: 10px;
      }
      .part3_info .list_info .title{
        font-size:19px;
        padding-bottom: 14px;
        padding-top: 4px;
      }
      .part3_info .list_info p{
        font-size:16px;
      }
      .map{
        width:calc(100% - 20px);
        height: 300px;
      }
      /* 4 */
      .about_part4{
        width: calc(100% - 20px);
      }
    .part4_list{
      width:calc(50% - 5px);
      padding: 10px;
      margin-bottom: 10px;
    }
    .part4_list_title p{
      font-size: 16px;
      /* font-weight: bold; */
      margin-left: 10px;
    }
    .part4_list_info{
      padding:16px 0;
    }
    .part4_list_info p{
      font-size:12px;
      line-height:18px;
    }
    .part4_list_link{
      width: 80px;
      height: 28px;
      line-height: 28px;
    }
    .part4_list_link a{
      font-size: 14px;
    }
  }