@media screen and (max-width: 991px) {
  .w-nav[data-collapse="medium"] .w-nav-menu {
    display: none;
  }

  .w-nav[data-collapse="medium"] .w-nav-button {
    display: block;
    color: #000;
  }

  .w-nav[data-collapse="medium"]:hover .w-nav-button {
    display: block;
    color: #fff;
  }
}

@media screen and (max-width: 767px) {
  /* html {
    font-size: 50%;
  } */

  .div-block-about {
    margin: 0 0 20px 0;

  }

  .div-about {
    padding: 0;
  }

  .tech-banner a {
    padding: 20px;

  }

  .div-head {
    margin: 0 -20px;
  }

  .container-18 {
    padding: 20px;
  }

  .container-19 {
    padding: 20px;
  }

  .container-tech {
    padding-right: 20px;
    padding-left: 20px;
  }

  .w-row {
    margin: 0 !important;
  }

  .w-col {
    width: 100%;
  }



  .wf-section h2 {
    display: block;
    font-size: 2.4rem;
  }


  .wf-section h2 .w-col-2 {
    width: 50%;
  }



  .flex-container {
    flex-direction: column;
    padding: 40px 20px;


  }

  .flex-container .hero-image-mask {
    margin: 0;
    order: -1;
    margin-bottom: 35px;
  }

  .w-nav[data-collapse="small"] .w-nav-menu {
    display: none;
  }

  .w-nav[data-collapse="small"] .w-nav-button {
    display: block;
  }

  .w-nav-brand {
    padding-left: 10px;
  }

  /* 头部 */
  .w-dropdown-toggle {
    margin-left: -234px;
    background-color: rgba(19, 19, 19, 0.97);
  }

  /* 脚步 */
  .footer .footer-flex-container {
    display: block;
    padding: 0 30px;

  }

  .footer-image {
    padding-bottom: 37px;
  }

  /* div-block-show */
  .div-block-show {
    margin: 0 0px 20px !important;

    .w-button2 {
      display: inline-block;
      margin-bottom: 40px;
    }

  }

  /* 提示 */
  .consultBox {
    right: 20px;
    width: 50px;
    overflow: hidden;
  }

  .consultBox .title {
    padding: 15px;
    display: block;
  }

  .consultBox .title .upDown {
    display: none;
  }

  .consultBox .title i {
    display: none;
  }

  .consultUp {
    width: auto;
    left: 20px;
    right: 20px;
    height: auto;

  }
  .consultUp .title {
    padding: 10px 16px;
    display: flex;
  }
  .consultUp .title .upDown {
    display: block;
  }

  .consultUp .title i {
    display: block;
  }

  /* 左右布局 */
  .flex-row{
    display:block ;
  }

  .flex-row .flex-row-left{
    width: 100%;

  }



}

@media screen and (max-width: 479px){
  html {
    font-size: 61%;
  }


  .products-top4,.products-top5,.products-top7,.products-top8{
    height: auto;
    padding-top: 50px;
  }

  .products-top6 {
    /* height: 600px; */
  }
  .tech-top2{
    height: auto;
  }
  .w-background-video{
    height: auto;
  }
  .w-background-video>video{
    position:static;
    width: 100%;
    height: auto;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    display: block;
  }
  .radioBtn {
    display: none;
  }

  .tech-top3-1 {
    padding-top: 0;
    height: auto;
    background-image: url(../images/可靠性设计.jpg);
  }

  .tech-top3-2 {
    padding-top: 0;
    height: auto;
    background-image: url(../images/高安全性.jpg);
  }

  .tech-top3-3 {
    padding-top: 0;
    height: auto;
    background-image: url(../images/大跨度的自适应数据率.jpg);
  }

  .tech-top3-4 {
    padding-top: 0;
    height: auto;
    background-image: url(../images/低时延多跳.jpg);
  }

  .tech-top3-5 {
    padding-top: 0;
    height: auto;
    background-image: url(../images/低功耗.jpg);
  }

  .tech-top3-6 {
    padding-top: 0;
    height: auto;
    background-image: url(../images/可移动性.jpg);
  }


  .tech-banner a {
    padding: 20px;

  }

  .div-block-bottom {
    margin-right: 0;
    float: none;
  }

  .w-tab-link {
    width: 100%;
  }

  .section-bg {
    height: 600px;
  }

  .nav-menu {
    position: absolute;
  }


  .div-head {
    margin: 0 auto;
  }

  .w-dropdown-toggle {
    margin-left: 0px;
  }

  .w-nav[data-collapse="tiny"] .w-nav-menu {
    display: none;
  }

  .w-nav[data-collapse="tiny"] .w-nav-button {
    display: block;
  }

  
    .products-top3 .w-container {
      flex-direction: column;
    }
    
    .products-top3 .w-container .text {
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .flex-row .flex-row-left.w30{
      width: 100%;
      display: none;
    }
  
    .div-block-show .text{
      min-height: auto;
    }
}