.m-head {
  display: none;
}
.m-nav {
  display: none;
}
@media screen and (max-width: 992px) {
  * {
    font-size: 13px;
  }
  body {
    padding-top: 71px;
  }
  .head-div {
    position: fixed !important;
    top: 0;
    box-shadow: 0 0 3px rgba(0, 0, 0, 0.2);
    background-color: #fff !important;
  }
  .head-div .head-div-main {
    display: none !important;
  }
  .head-div .head-nav {
    display: none !important;
  }
  .head-div .head {
    padding: 20px 0 10px;
  }
  .head-div .head .head-logo {
    width: 160px;
  }
  .head-div .head .head-logo img {
    max-width: 100%;
  }
  .m-head {
    display: block;
  }
  .m-head .m-search {
    display: none;
    position: absolute;
    left: 3%;
    top: 28px;
  }
  .m-head .m-search a {
    font-size: 22px;
    color: #d11f25;
  }
  .m-head .switch {
    width: 30px;
    height: 30px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    position: absolute;
    right: 3%;
    top: 23px;
  }
  .m-head .switch span {
    width: 30px;
    height: 3px;
    margin-bottom: 8px;
    background-color: #d11f25;
    transition: all 0.3s linear;
  }
  .m-head .switch span:last-child {
    margin-bottom: 0;
  }
  .m-nav {
    display: none;
    min-height: calc(100vh - 71px);
    padding: 0 15px 10px;
  }
  .m-nav .m-navlist {
    border-top: 1px solid #e5e5e5;
    padding-top: 20px;
  }
  .m-nav .m-navlist > li {
    margin-bottom: 5px;
    border: 1px solid #ccc;
    border-radius: 3px;
    padding: 0 15px;
    position: relative;
  }
  .m-nav .m-navlist > li > a {
    font-weight: bold;
  }
  .m-nav .m-navlist > li a {
    display: block;
    color: #777;
    line-height: 40px;
    position: relative;
    border-color: #ccc;
  }
  .m-nav .m-navlist > li .erji2 {
    transition: all 0.3s linear;
  }
  .m-nav .m-navlist > li .erji2 a {
    height: 0;
    transform: scaleY(0);
    transform-origin: 0 0;
    overflow: hidden;
    transition: all 0.3s linear;
  }
  .m-nav .m-navlist .dir i {
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    font-size: 22px;
    font-weight: bold;
    position: absolute;
    top: 50%;
    right: -12px;
    transform: translateY(-50%);
  }
  .m-nav .m-navlist .dir i::after {
    content: "\002B";
  }
  .m-nav .m-navlist .nav-open a {
    border-bottom: 1px solid #ccc;
  }
  .m-nav .m-navlist .nav-open .erji2 {
    padding-bottom: 10px;
    transition: all 0.3s linear;
  }
  .m-nav .m-navlist .nav-open .erji2 a {
    height: 40px;
    transform: scaleY(1);
    transition: all 0.3s linear;
  }
  .m-nav .m-navlist .nav-open i::after {
    content: "\2212";
  }
  .open .m-nav {
    display: block;
  }
  .open .switch span:nth-child(2) {
    display: none;
  }
  .open .switch span:first-child {
    transform: rotateZ(45deg);
    margin-bottom: -3px;
  }
  .open .switch span:last-child {
    transform: rotateZ(-45deg);
  }
  .index-pro .index-pro-title-row {
    padding-top: 5%;
    padding-bottom: 10px;
  }
  .index-pro .index-pro-title-row .index-pro-title-row-main {
    display: block;
  }
  .index-pro .index-pro-title-row .index-pro-title-row-main .index-pro-title {
    width: 100%;
    text-align: center;
    padding-bottom: 20px;
  }
  .index-pro .index-pro-title-row .index-pro-title-row-main .index-pro-title a {
    color: #fff;
    position: relative;
  }
  .index-pro .index-pro-title-row .index-pro-title-row-main .index-pro-title a::after {
    display: none;
  }
  .index-pro .index-pro-title-row .index-pro-title-row-main .index-pro-title a b {
    font-size: 30px;
  }
  .index-pro .index-pro-title-row .index-pro-title-row-main .index-pro-title a span {
    font-size: 16px;
  }
  .index-pro .index-pro-title-row .index-pro-title-row-main .pro-nav {
    width: 100%;
    margin: 0 0 0 auto;
  }
  .index-pro .index-pro-title-row .index-pro-title-row-main .pro-nav ul {
    flex-wrap: wrap;
  }
  .index-pro .index-pro-title-row .index-pro-title-row-main .pro-nav ul li a {
    line-height: 26px;
    font-size: 13px;
  }
  .index-pro .index-pro-title-row .index-pro-title-row-main .pro-nav ul .swiper-slide-thumb-active a {
    font-size: 14px;
  }
  .index-news .index-news-title {
    padding-top: 5%;
  }
  .index-news .index-news-title .index-news-title-main a b {
    font-size: 30px;
  }
  .index-news .index-news-title .index-news-title-main a span {
    font-size: 16px;
    margin-left: 5px;
  }
  .index-news .index-news-main {
    flex-wrap: wrap;
  }
  .index-news .index-news-main .index-news-gongsi {
    width: 100%;
    margin-bottom: 20px;
  }
  .index-news .index-news-main .index-news-hangye {
    width: 48%;
  }
  .index-news .index-news-main .index-news-jishu {
    width: 48%;
  }
  .index-about {
    flex-wrap: wrap;
  }
  .index-about .index-about-left {
    width: 100%;
  }
  .index-about .index-about-left .pic {
    height: auto;
  }
  .index-about .index-about-right {
    width: 100%;
  }
  .index-service .index-service-title h1 {
    font-size: 30px;
  }
  .index-service .index-service-main {
    padding-top: 30px;
  }
  .index-service .index-service-main ul {
    flex-wrap: wrap;
  }
  .index-service .index-service-main ul li {
    margin-bottom: 3%;
  }
  .index-service .index-service-main ul li a {
    display: block;
  }
  .index-service .index-service-main ul li a .pic {
    transform: scale(0.8);
  }
  .index-service .index-service-main ul li a h1 {
    font-size: 18px;
    margin-top: 0;
  }
  .index-service .index-service-main ul li a p {
    font-size: 13px;
  }
  .footer .footer-main {
    width: 90%;
  }
  .footer .footer-main .footer-item {
    display: none;
  }
  .footer .footer-main .footer-lianxi {
    flex: 1;
  }
  .footer .footer-main .footer-wechat {
    width: auto;
  }
  .footer .footer-main .footer-wechat ul li {
    display: block;
  }
  .footer .footer-main .footer-wechat ul li img {
    width: 110px;
  }
  .copying .copying-main {
    flex-wrap: wrap;
  }
}
@media screen and (max-width: 500px) {
  .index-pro .index-pro-main .index-pro-list {
    margin-top: 30px;
  }
  .index-pro .index-pro-main .index-pro-list li {
    width: 49%;
    margin-right: 2%;
    margin-bottom: 4%;
  }
  .index-pro .index-pro-main .index-pro-list li:nth-child(2n) {
    margin-right: 0;
  }
  .index-pro .index-pro-main .index-pro-list li a p {
    font-size: 12px;
  }
  .index-news {
    padding-bottom: 45px;
  }
  .index-news .index-news-main .index-news-hangye {
    width: 100%;
    margin-bottom: 20px;
  }
  .index-news .index-news-main .index-news-jishu {
    width: 100%;
  }
  .index-about .index-about-right .index-about-info {
    padding: 8% 5%;
  }
  .index-about .index-about-right .index-about-info .index-about-title img {
    width: 80%;
  }
  .index-about .index-about-right .index-about-info .index-about-title p {
    font-size: 22px;
  }
  .index-about .index-about-right .index-about-info ul {
    flex-wrap: wrap;
  }
}