@media (max-width:479px) {
  section {
    width: 95%;
  }
  .padding{
    padding: 40px 0;
  }
  /**菜单**/
  header {
    height: 80px;
    z-index: 999;
    position: fixed;
    top: 0;
    left: 0;
    overflow: visible;
    padding: 11px 2.5%;
  }
  header nav{
    display: none;
  }
  .button{
    right: 3%;
    top: 30px;
  }
  .head_2 div:last-child nav{
    display: block;
    width: 100%;
  }
  .head_2 div:last-child nav ul{
    width: 100%;
    margin-right: 0;
  }
  .head_2 div:last-child nav ul li{
    float: none;
    width: 100%;
    border-right: none;
    border-bottom: 1px solid rgba(255,255,255,0.2);
    padding: 18px 0;
  }
  .head_2 div:last-child li{
    margin-bottom: 0;
  }
  .search{
    display: block;
  }
  .banner section{
    padding: 0 40px;
  }
  .banner section p{
    font-size: 18px;
  }
  .banner section p::after{
    content: "";
    bottom: -14px;
  }
  .banner section h3{
    font-size: 24px;
    width: 80%;
    margin: 24px 0;
  }
  .about{
    padding-top: 30px;
  }
  .about section .about_left{
    width: 100%;
  }
  .about_left .number{
    margin-bottom: 0;
  }
  .about_left .floor{
    left: 0;
  }
  .about_left .floor img{
    width: 100%;
  }
  .about section .about_right{
    width: 100%;
    margin-top: 20px;
  }
  .about section .about_right h5{
    font-size: 38px;
    margin: 20px 0;
  }
  .about .more{
    margin: 20px 0;
  }
  .pro_list section ul li div{
    right: 20px;
    bottom: 20px;
  }
  .pro_list section{
    margin-top: 35px;
  }
  .pro_list section ul li h6{
    font-size: 24px;
  }
  .pro_list section ul li p{
    font-size: 18px;
    margin: 16px 0;
  }
  .pro_list{
    margin-bottom: 30px;
  }
  .sheets{
    height: 360px;
  }
  .sheets .swiper-container2{
    width: 100% !important;
    height: 360px !important;
  }
  .sheets .swiper-container2 .swiper-slide{
    overflow: hidden;
  }
  .sheets .swiper-container2 .swiper-slide img{
    height: 360px;
    width: auto;
  }
  .sheets .sheets_info{
    width: 100%;
  }
  .sheets_more{
    padding: 18px 0;
  }
  .news{
    padding: 40px 0;
  }
  .news_list li{
    width: 100%;
    margin-right: 0;
    margin-bottom: 20px;
  }
  .contact{
    margin-bottom: 40px;
  }
  .contact li{
    width: 100%;
    margin-bottom: 15px;
  }
  .message li{
    width: 100%;
    margin-bottom: 20px;
  }
  footer{
    padding: 30px 0;
  }
  footer .foot_nav ul{
    display: none;
  }
  footer .foot_info{
    flex-wrap: wrap;
    position: relative;
    height: 400px;
    text-align: center;
  }
  footer .foot_info div:first-child{
    position: absolute;
    bottom: 0;
    top: auto;
    width: 100%;
  }
  footer .foot_info div:last-child{
    flex-wrap: wrap;
  }
  footer .foot_info .footer_mb{
    display: block !important;
    width: 100%;
  }
  footer .foot_info ul{
    margin: 0;
  }
  footer .foot_info li{
    margin-bottom: 10px;
  }
  footer .foot_nav div{
    margin: 0 auto;
  }
  /* footer .foot_info div:first-child img:last-child{
    position: absolute;
    bottom: 25px;
    right: -80px;
  } */
  footer form{
    display: none;
  }

  .banner_1{
    height: 400px;
  }
  .banner_bg{
    height: 400px;
  }
  .banner_bg h2{
    font-size: 32px;
  }
  .about_info ul li{
    flex-wrap: wrap;
  }
  .about_info ul li:nth-child(2n+0) .about_text{
    text-align: left;
  }
  .about_info ul li:nth-child(2n+0) .about_text p{
    text-align: left;
  }
  .about_info ul li .about_text span{
    margin-top: 20px;
    margin-bottom: 15px;
  }
  .about_info ul li .about_img{
    width: 100%;
  }
  .about_info ul li .about_text{
    width: 100%;
  }
  .about_info ul li .about_img img{
    width: 100%;
    height: auto;
  }
  .title span{
    font-size: 15px;
  }
  .iconfont4{
    margin: 0 8px;
  }
  .honors ul{
    margin: 35px 0;
  }
  .honors ul li{
    width: 100%;
    margin-bottom: 40px;
  }
  .honors ul li div{
    align-items: center;
  }
  .honors ul li div img{
    width: 48%;
    height: auto;
  }
  .honors ul li:last-child div img{
    width: auto;
  }
  .partner li{
    width: 48.5%;
    height: auto;
    margin-bottom: 10px;
  }
  .partner li img{
    width: 100%;
    height: auto;
  }
  .sheets_list li{
    flex-wrap: wrap;
    margin-bottom: 30px;
    padding-bottom: 30px;
  }
  .sheets_list li .sheets_list_l{
    width: 100%;
    height: auto;
    margin-bottom: 15px;
  }
  .product_list li{
    float: left;
    width: 30%;
    margin: 0 1.66% 30px;
  }
  .product_list li .product_img{
    width: 100%;
    overflow: hidden;
    height: auto;
  }
  .product_list li .product_img div{
    width: 100%;
    height: 100%;
    top: 100%;
  }
  .product_list li .product_img div::after{
    height: 30%;
  }
  .product_list li .product_info{
    height: 108px;
  }
  .product_list li .product_info .outer{
    font-size: 12px;
    word-break: break-all;
    width: 80%;
    margin: 0 auto;
  }
  .introduction_l{
    width: 100%;
    height: auto;
    margin-bottom: 30px;
  }
  .introduction_r{
    width: 100%;
  }
  .product_title{
    margin-top: 80px;
  }
  .pro_nav ul{
    display: block;
    overflow-x: scroll;
    overflow-y: hidden;
    white-space:nowrap;
    -webkit-overflow-scrolling:touch;
  }
  .pro_nav ul li{
    display: inline-block;
    margin-left: 15px;
  }
  .pro_nav ul::-webkit-scrollbar{
    display: none;
  }
  .introduction_r li h4{
    width: 140px;
  }
}

@media (min-width: 480px) and (max-width: 768px) {
  section {
    width: 95%;
  }
  .padding{
    padding: 40px 0;
  }
  /**菜单**/
  header {
    height: 80px;
    z-index: 999;
    position: fixed;
    top: 0;
    left: 0;
    overflow: visible;
    padding: 11px 2.5%;
  }
  header nav{
    display: none;
  }
  .button{
    right: 3%;
    top: 30px;
  }
  .head_2 div:last-child nav{
    display: block;
    width: 100%;
  }
  .head_2 div:last-child nav ul{
    width: 100%;
    margin-right: 0;
  }
  .head_2 div:last-child nav ul li{
    float: none;
    width: 100%;
    border-right: none;
    border-bottom: 1px solid rgba(255,255,255,0.2);
    padding: 18px 0;
  }
  .head_2 div:last-child li{
    margin-bottom: 0;
  }
  .search{
    display: block;
  }
  .banner section{
    padding: 0 40px;
  }
  .banner section p{
    font-size: 24px;
  }
  .banner section p::after{
    content: "";
    bottom: -14px;
  }
  .banner section h3{
    font-size: 32px;
    width: 80%;
    margin: 24px 0;
  }
  .about{
    padding-top: 30px;
  }
  .about section .about_left{
    width: 100%;
  }
  .about_left .number{
    margin-bottom: 0;
  }
  .about_left .floor{
    left: 0;
  }
  .about_left .floor img{
    width: 100%;
  }
  .about section .about_right{
    width: 100%;
    margin-top: 20px;
  }
  .about section .about_right h5{
    font-size: 38px;
    margin: 20px 0;
  }
  .about .more{
    margin: 20px 0;
  }
  .pro_list section ul li div{
    right: 20px;
    bottom: 20px;
  }
  .pro_list section{
    margin-top: 35px;
  }
  .pro_list section ul li h6{
    font-size: 24px;
  }
  .pro_list section ul li p{
    font-size: 18px;
    margin: 16px 0;
  }
  .pro_list{
    margin-bottom: 30px;
  }
  .sheets{
    height: 410px;
  }
  .sheets .swiper-container2{
    width: 100% !important;
    height: 410px !important;
  }
  .sheets .swiper-container2 .swiper-slide{
    overflow: hidden;
  }
  .sheets .swiper-container2 .swiper-slide img{
    height: 410px;
    width: auto;
  }
  .sheets .sheets_info{
    width: 100%;
  }
  .sheets_more{
    padding: 18px 0;
  }
  .news{
    padding: 40px 0;
  }
  .news_list li{
    width: 100%;
    margin-right: 0;
    margin-bottom: 20px;
  }
  .contact{
    margin-bottom: 40px;
  }
  .contact li{
    width: 100%;
    margin-bottom: 15px;
  }
  .message li{
    width: 100%;
    margin-bottom: 20px;
  }
  footer{
    padding: 30px 0;
  }
  footer .foot_nav ul{
    display: none;
  }
  footer .foot_info{
    flex-wrap: wrap;
    position: relative;
    height: 400px;
    text-align: center;
  }
  footer .foot_info div:first-child{
    position: absolute;
    bottom: 0;
    top: auto;
    width: 100%;
  }
  footer .foot_info div:last-child{
    flex-wrap: wrap;
  }
  footer .foot_info .footer_mb{
    display: block !important;
    width: 100%;
  }
  footer .foot_info ul{
    margin: 0;
  }
  footer .foot_info li{
    margin-bottom: 10px;
  }
  footer .foot_nav div{
    margin: 0 auto;
  }
  footer form{
    display: none;
  }
  .banner_1{
    height: 400px;
  }
  .banner_bg{
    height: 400px;
  }
  .banner_bg h2{
    font-size: 32px;
  }
  .about_info ul li{
    flex-wrap: wrap;
  }
  .about_info ul li:nth-child(2n+0) .about_text{
    text-align: left;
  }
  .about_info ul li:nth-child(2n+0) .about_text p{
    text-align: left;
  }
  .about_info ul li .about_text span{
    margin-top: 20px;
    margin-bottom: 15px;
  }
  .about_info ul li .about_img{
    width: 100%;
  }
  .about_info ul li .about_img img{
    width: 100%;
    height: auto;
  }
  .about_info ul li .about_text{
    width: 100%;
  }
  .title span{
    font-size: 15px;
  }
  .iconfont4{
    margin: 0 8px;
  }
  .honors ul{
    margin: 35px 0;
  }
  .honors ul li{
    width: 100%;
    margin-bottom: 40px;
  }
  .honors ul li div{
    align-items: center;
  }
  .honors ul li div img{
    width: 48%;
    height: auto;
  }
  .honors ul li:last-child div img{
    width: auto;
  }
  .partner li{
    width: 48.5%;
    height: auto;
    margin-bottom: 10px;
  }
  .partner li img{
    width: 100%;
    height: auto;
  }
  .sheets_list li{
    flex-wrap: wrap;
    margin-bottom: 30px;
    padding-bottom: 30px;
  }
  .sheets_list li .sheets_list_l{
    width: 100%;
    height: auto;
    margin-bottom: 15px;
  }
  .product_list li{
    float: left;
    width: 30%;
    margin: 0 1.66% 30px;
  }
  .product_list li .product_img{
    width: 100%;
    overflow: hidden;
    height: auto;
  }
  .product_list li .product_img div{
    width: 100%;
    height: 100%;
    top: 100%;
  }
  .product_list li .product_img div::after{
    height: 30%;
  }
  .product_list li .product_info{
    height: 108px;
  }
  .product_list li .product_info .outer{
    font-size: 12px;
    word-break: break-all;
    width: 80%;
    margin: 0 auto;
  }
  .introduction_l{
    width: 100%;
    height: auto;
    margin-bottom: 30px;
  }
  .introduction_r{
    width: 100%;
  }
  .product_title{
    margin-top: 80px;
  }
  .pro_nav ul{
    display: block;
    overflow-x: scroll;
    overflow-y: hidden;
    white-space:nowrap;
    -webkit-overflow-scrolling:touch;
  }
  .pro_nav ul li{
    display: inline-block;
    margin-left: 15px;
  }
  .pro_nav ul::-webkit-scrollbar{
    display: none;
  }
  .introduction_r li h4{
    width: 140px;
  }
}
@media (min-width: 769px) and (max-width: 1200px){
  section {
    width: 94%;
  }
  header{
    padding: 20px;
  }
  header nav ul li{
    padding: 0 12px;
  }
  .button{
    right: 20px;
  }
  .about .more{
    margin: 20px 0;
  }
  .sheets .swiper-container2{
    width: 100% !important;
  }
  .sheets .sheets_info{
    width: 100%;
  }
  .news_list li{
    width: 48%;
    margin-right: 4%;
    margin-bottom: 35px;
  }
  .news_list li:nth-child(2n+0){
    margin-right: 0;
  }
  .contact li{
    margin-bottom: 30px;
  }
  .about_info ul li .about_img{
    width: 60%;
  }
  .about_info ul li .about_img img{
    width: 100%;
    height: auto;
  }
  .about_info ul li .about_text{
    width: 35%;
  }
  .honors ul li div{
    align-items: center;
  }
  .honors ul li div img{
    width: 48%;
    height: auto;
  }
  .sheets_list li .sheets_list_l{
    width: 35%;
    height: auto;
  }
  .sheets_list li .sheets_list_r{
    width: 62%;
  }
  .sheets_list li p{
    font-size: 14px;
    margin-top: 10px;
  }
  .pro_nav ul{
    display: block;
    overflow-x: scroll;
    overflow-y: hidden;
    white-space:nowrap;
    -webkit-overflow-scrolling:touch;
  }
  .pro_nav ul li{
    display: inline-block;
    margin-left: 15px;
  }
  .pro_nav ul::-webkit-scrollbar{
    display: none;
  }
  .product_list li{
    width: 30%;
    height: auto;
    margin: 0 1.66% 30px;
  }
  .product_list li .product_img{
    width: 100%;
    height: auto;
  }
  .product_list li .product_img div{
    width: 100%;
    height: 100%;
    top: 100%;
  }
  .product_list li .product_img div::after{
    height: 30%;
  }
  .introduction_l{
    margin-bottom: 30px;
    width: 50%;
    height: auto;
  }
  .introduction_r{
    width: 45%;
  }
  .introduction_r li h4{
    width: 120px;
  }
  .introduction_r li{
    margin-bottom: 20px;
    padding-bottom: 20px;
  }
  .news_list li:nth-child(3n+0){
    margin-right: 4%;
  }
  .news_list li:nth-child(6n+0){
    margin-right: 0;
  }
  .pro_list section ul li div{
    right: 80px;
  }
}