.nav-bar{
  background-color: #6666662c!important;
}
.nav-bar:hover{
  background-color: white!important;
}
.banner {
  height: 355px;
    background: url(../../images/business/triboelectricity/banner_bg.png) no-repeat;
    background-size: 100% 100%;
  
  }
  
  .banner .t1,
  .banner .t2 {
    font-weight: 500;
    color: #fff;
    text-align: center;
  }
  
  .banner .t1 {
    padding-top: 190px;
    font-size: 50px;
  }
  
  .banner .t2 {
    font-size: 25px;
    padding-top: 30px;
  }
  
  /* .action-warp {
    padding: 50px 0;
  }
  
  .action {
    width: 1200px;
    border: 1px solid rgb(216, 216, 216);
    display: flex;
    margin: 0 auto;
    margin-bottom: 100px;
  }
  .action:nth-of-type(3) {
    margin-bottom: 0;
  }
  
  .action div {
    box-sizing: border-box;
    flex: 1;
    height: 400px;
    width: 600px;
  }
  
  .action .txtbox {
    padding-top: 100px;
  }
  .action .txtbox p {
    padding-left: 67px;
  }
  
  .action .txtbox .blue_txt {
    font-size: 75px;
    font-weight: 500;
    color: rgba(36, 110, 230, 1);
  }
  .action .txtbox .t2 {
    font-size: 37px;
    font-weight: 500;
  }
  
  .action .txtbox .t3 {
    font-size: 24px;
    font-weight: 300;
    color: rgba(152, 152, 152, 1);
  }
  
  .action .imgbox img {
    width: 100%;
    height: 100%;
  } */
  .main {
    background-color: #F8F8F8;
    padding-bottom: 20px;
  }
  
  .info_warp {
    width: 1200px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin: 0px auto;
    padding-top: 8px;
    padding-bottom: 32px;
  }
  
  .info {
    background-color: #fff;
    width: 384px;
    height: 218px;
    box-shadow: 0px 4px 10px 0px rgba(0, 0, 0, 0.1);
    text-align: center;
    margin-top: 24px;
  }
  
  .info .info_txtbox {
    color: #3D3D3D;
  }
  
  .info .info_txtbox .t1 {
    font-weight: 600;
    margin: 16px 0;
    font-size: 20px;
    font-family: PingFang SC-Semibold, PingFang SC;
  }
  
  .info .info_txtbox .t2 {
    font-size: 12px;
    font-family: Source Han Sans CN-Regular, Source Han Sans CN;
    text-align: start;
    margin: 0 auto;
    width: 256px;
    line-height: 20px;
  }
  
  .info .info_img {
    width: 48px;
    height: 48px;
    margin-top: 38px;
  }
  
  
  .contain_box {
    width: 1200px;
    height: 100%;
    margin: 0 auto;
    position: relative;
  }
  
  .introBox {
    width: 594px;
    height: 190px;
    display: flex;
    background-color: rgba(255, 255, 255, 0.201);
    position: absolute;
    padding:10px 20px;

  top: 109px;
  }
  
  .interface {
    /* margin: 20px;   */
    width: 95px;
    margin-right: 20px;
  }
  
  .introTittle {
    height: 24px;
    font-size: 24px;
    font-family: PingFang SC-Semibold, PingFang SC;
    font-weight: 600;
    color: #333333;
    line-height: 24px;
  
    margin: 20px 0;
  }
  
  .introContaint {
    width: 431px;
    font-size: 14px;
    font-family: PingFang SC-Medium, PingFang SC;
    font-weight: 500;
    color: #666666;
    line-height: 24px;
  }
  
  .sumadvantages{
    width: 1200px;
    margin: 0 auto;
    background: url(../../images/business/triboelectricity/bg.png) no-repeat;
    background-size: cover;
    padding: 42px ;
    margin-bottom: 32px;
  }
  .icon_boxs{
    display: flex;
    justify-content: space-between;
  }
  .icon_box{
    border-right: 1px white solid;
    width: 33%;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: white;
  }
  .icon_box:last-child{
    border-right: 0px;
  }
  .icon_box > img{
    width: 70px;
    height: 70px;
    margin-bottom: 20px;
  }
  .icon_box > p{
    font-family: PingFang SC-Semibold, PingFang SC;
    font-weight: 600;
  }