@media (max-width: 1200px) {
  .header_nav .navbar-nav .nav-item {
    line-height: 1.25rem;
  }
  .header_nav .navbar-nav .nav-link {
    padding: 0 0.875rem;
    font-size: 13px;
  }
  .chat-wrap {
    padding: 0 10px;
  }
  .navbar-logo img {
    max-width: 200px;
  }
  .title .title_nav {
    margin-left: 1rem;
  }
  .title .title_nav span {
    margin: 0;
    font-size: 1.0rem;
  }
  .footer_nav {
    flex-wrap: wrap;
  }
  .footer_item{
    width: 20%;
    flex: none;
    text-align: center;
    padding: 1.25rem 0;
    border-bottom: 1px solid #323c4c;
    border-left: none;
  }
  .footer_item:last-child {
    width: 100%;
    border-bottom: none;
  }
  .footer_item2 {
    width: 100%;
  }
  .footer_1 {
    padding: 1.0rem;
  }
}
@media (max-width: 992px) {
  header {
    position: relative;
  }
  .navbar {
    position: unset;
  }
  
  .header_collapse {
    position: absolute;
    width: 100%;
    top: 5.0rem;
    left: 0;
    background: rgba(0, 0, 0, .8);
    z-index: 10;
  }
  .header_collapse ul li {
    text-align: center;
  }
  .header_nav .navbar-nav .nav-link {
    color: #fff;
  }
  .header_nav .navbar-nav .nav-link,
  .header_nav .navbar-nav>li>a:hover,
  .header_nav .navbar-nav .active>a {
    border-bottom: none;
  }
  .header_nav .navbar-nav .nav-item {
    line-height: 36px;
  }
  .chat-wrap {
    display: none;
  }
  .tel-top {
    color: #fff;
  }
  .tel-top i {
    color: #fff;
  }
  .title_wrap {
    flex-wrap: wrap;
  }
  .title .title_nav {
    width: 78%;
    margin-top: 1.0rem;
  }
  .title-more1 {
    margin-top: 1.125rem;
  }
  .case_item .case_info, .case_item .case_info1 {
    margin: 1.25rem auto;
    width: 90%;
    padding: 1.25rem;
  }
  .case_item .case_info1 {
    padding: 5px 0.625rem;
  }
  .set3_right {
    padding: 1.25rem 3.125rem;
  }
  .set3_m_title {
    padding: 1.25rem 3.125rem;
  }
  .set4 {
    padding: 2.5rem 1.875rem;
  }
  .set4 h6 {
    width: 92%;
  }
  .set4_bottom {
    padding: 2.5rem 0;
  }
  .zzpagination {
    bottom: 0rem;
  }
  .inner_contact_set1_nav ul {
    display: flex;
    flex-wrap: wrap;
  }
  .inner_contact_set1_nav ul li {
    width: 160px;
  }
}    
@media (max-width: 768px) {
  .bannernext,
  .bannerprev {
    display: none;
  }
  .title-more a {
    width: 62px;
    height: 19px;
  }
  .pdg50 {
    padding: 1rem;
  }
  .title .title-name h5 {
    font-size: 1.25rem;
  }
  .title .title_nav span {
    padding: 5px 0.625rem;
  }
  .product_list .news-box {
    width: 47%;
    margin-top: 1rem;
  }
  .case_item .case_info,
  .case_item .case_info1 {
    top:50%;
    transform: translate(0,-50%);
    margin-top: 0;
  }
  .set2_right {
    margin-top: 1.25rem;
  }
  .case_item a>img,
  .case_item>img {
    width: 100%;
  }
  .set3_m_title {
    padding: 1.0rem;
  }
  .news_list .news-box .news-content .news-info {
    color: #111;
    line-height: 1.5rem;
    height: 1.5rem;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .news_list .news-box .news-content .news-date {
    margin: 5px 0;
  }
  .set3_right {
    padding: 1.0rem;
  }
  .set3_right .news_list .more {
    display: none;
  }
  .set4 {
    padding: 1.875rem 1rem;
  }
  .set4 h5 {
    font-size: 1.25rem;
  }
  .set4 h6 {
    margin: 1.0rem auto;
  }
  .set4_bottom {
    padding: 0rem 0 2.5rem;
  }
  .us_set1_1 {
    margin-top: -5rem;
  }
  .us_set1_2 {
    margin-top: 1.25rem;
  }
  .us_zz_list ul li {
    width: 45%;
  }
  .product_set1 .product_list {
    margin-top: 5px;
  }
  .product_set1 .product_list .news-box {
    margin-bottom: 0rem;
  }
  .product_xq_img {
    margin-right: 0;
    border-bottom: 1px solid #ccc;
    padding-bottom: 1.25rem;
  }
  .product_xq_info {
    background: #fff;
    padding: 1.25rem;
  }
  .product_xq_info h5 {
    margin-top: 0;
  }
  .in_news_list .news-box {
    width: 47%;
    margin-top: 1.0rem;
  }
  .news_xq_common_bottom .news-box .news-content .news-date {
    margin: 3px 0;
  }
  .news_xq_common_bottom .news-box {
    padding-bottom: 1.25rem;
    border-bottom: 1px solid #eee;
  }
  .case_list .news-box {
    width: 47%;
  }
  .casexq_set1 .desc {
    margin-top: 1.25rem;
  }
  .casexq_set1 .desc .text {
    margin-top: 1.25rem;
  }
  .casexq_set2,
  .casexq_set2_right {
    margin-top: 1.25rem;
  }
}
@media (max-width: 576px) {
  .us_set1_1 {
    margin-top: -2.75rem;
    padding: 1.25rem 1.0rem;
  }
  .us_set1_2 ul li h6 {
    background-size: cover;
    width: 30px;
    height: 68px;
    padding-top: 3px;
  }
  .us_zz_nav span {
    margin: 0 0.8rem;
  }
  .us_zz_bottom {
    padding: 0.5rem 1.0rem 0;
  }
  .us_zz_list ul li{
    margin: 0.5rem 2.5% 0;
  }
  .product_title_nav a {
    margin: 0 2px;
    font-size: 13px;
  }
  .page {
    padding: 1.0rem 0;
  }
  .product_xq_set2_info {
    padding: 1.25rem 0;
  }
  .in_news_list .news-box .news-content {
    padding: 1.0rem;
  }
  .inner_contact_set1_nav ul li {
    width: 33.3%;
    padding-left: 10px;
  }
  .inner_contact_list .map {
    margin-top: 0.625rem;
  }
  .n_contract {
    padding-left: 1.25rem;
  }
  .grzx_form_item {
    float: none;
    width: 98%;
  }
  .grzx_btn {
    width: 40%;
    margin: 5px auto 0;
  }
  .casexq_set1 .desc h5 {
    font-size: 1.25rem;
  }
  .casexq_set1 .desc .text {
    margin-top: 10px;
  }
  .case_title i {
    width: 15px;
    height: 15px;
  }
  .updown_item1 {
    padding: 0 1.0rem;
    margin: 1.0rem 0;
  }
  .updown_nav {
    margin-top: 10px;
  }
  .updown_nav .updown_nav_item ul li a {
    margin: 5px 3px 0 0;
  }
  
}