@media only screen and (max-width: 1440px) and (min-width: 769px) {
  .header .nav-box .logo img {
    max-width: 218px;
  }

  .navbar-expand-lg .navbar-nav .nav-link {
    font-size: 1rem;
  }

}

@media only screen and (max-width:992px) {
  .header .navbar-collapse {
    display: none;
  }

  .header .navbar-collapse.mobile-nav-box-show {
    display: block;
    position: fixed;
    top: 70px;
    width: 100%;
    height: calc(100% - 70px);
    left: 0px;
    background-color: rgba(255, 255, 255, .95);
  }

  .header .navbar-collapse.mobile-nav-box-show .right-tel {
    padding: 5px 20px;
  }

  .header-scroll {
    background-color: rgba(0, 0, 0, .6);
    box-shadow: 0px 2px 5px #aaa;
    height: 70px;
    padding: 0px 10px;
  }

  .navbar .meun-btn {
    left: auto;
    right: 0;
    display: block;
    width: 50px;
  }

  .navbar .nav-item {
    width: 100%;
    border-bottom: 1px solid #ccc;

  }

  .navbar .nav-item a {
    display: block;


  }

  .navbar .meun-btn.meun-btn-open span {
    width: 0px;
  }

  .navbar .meun-btn.meun-btn-open span:before {
    top: 0px;
    transform: rotate(45deg);
  }

  .navbar .meun-btn.meun-btn-open span:after {
    top: 0px;
    transform: rotate(-45deg);
  }

  .navbar-expand-lg .navbar-nav .nav-link {
    color: #666;
    padding: 10px 20px;
    text-align: left;
  }

  .youshi-box .youshi-list {
    flex-wrap: wrap;
  }

  .youshi-box .youshi-list .youshi-list-item {
    position: relative;
    flex: 0 0 100%;
    transition: all .5s ease;
    flex-basis: 100%;
    min-height: auto;
  }

  .youshi-box .youshi-list .line {
    margin-bottom: 0px;
    margin-top: 0px;
  }

  .youshi-box .youshi-list .youshi-list-item .youshi_richText {
    display: block;
  }

  .youshi-list-item .list-main {
    top: 40%;
  }

  .case-category .category-list {
    padding: 0px;
    display: flex;
  }

  .case-category .category-list .font {
    padding: 5px;
    flex: 0 0 49%;

  }

  .case-main .row {
    display: flex;
  }

  .case-main .case-list {
    flex: 0 0 50%;
    padding: 5px;
  }

  .case-list .case-title {
    font-size: 0.875rem;
    line-height: 1.2rem;
    min-height: 3.6rem;
    color: #666;
    text-align: center;
  }

  .case-category .category-list .font a {
    font-size: 1rem;
  }

  .about-box .about-box-pic {
    flex: 1;
    width: 100%;
    clear: left;
  }

  .about-box-text .about-name b {
    display: block;
    color: #075aad;
    font-size: 22px;
  }

  .about-box-main .about-box-subnav {
    margin: 2rem 0;
  }

  .header .nav-box .logo img {
    max-width: 218px;
  }

  .box_banner .banner_pic img {
    width: auto;
    height: 350px;
  }

  .mobile-nav-box {
    width: 100%;
  }

  .footer-box .foot-list .foot-menu {
    width: 100%;
  }

  .footer-box .foot-list {
    flex-wrap: wrap;
  }

  .footer-box .foot-message-list {
    margin-bottom: 0rem;
  }

  .footer-box .foot-message {
    width: 100%;
  }

  .footer-box .foot-list .col-md-12 {
    margin-bottom: 1rem;
  }

  .copyright-box {
    padding: 15px 0;
    overflow: hidden;
    flex-wrap: wrap;
  }

  .case-box .title .title-font {
    font-size: 1.6rem;
  }

  .box_banner {
    padding-top: 70px;
    background-color: #333;
    max-height: 320px;
  }

  .box_banner .swiper-button-next,
  .box_banner .swiper-button-prev {
    height: 24px;
  }

  .about-box-subnav .row .col-md-4 {
    flex: 0 0 33.3%
  }

  .news-box .title .title-font {
    font-size: 1.6rem;
  }

  .youshi-box .title .title-font {
    text-align: center;
    font-size: 1.6rem;
  }

  .about-box-main .about-box-subnav .row .col-xs-6{
flex: 0 0 25%;
  }


}