@media only screen and (max-width: 1200px) {
  * {
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
  }
  input,
  textarea {
    -webkit-appearance: none;
    /*去除input默认样式*/
  }
  html {
    min-height: 100%;
    position: relative;
  }
  body,
  html {
    font-size: 12px;
  }
  body {
    position: static;
  }
  img {
    max-width: 100%;
  }
  .height {
    height: 100%;
    overflow: hidden;
  }
  .wrapper {
    width: auto;
    margin: 0 5%;
    max-width: none;
  }
  .gh {
    display: block;
    position: relative;
    float: right;
    height: 35px;
    width: 35px;
    top: 0px;
    right: 10px;
    z-index: 100;
    transition: all 0.5s cubic-bezier(0.7, 0, 0.3, 1) 0s;
    -webkit-transition: all 0.5s cubic-bezier(0.7, 0, 0.3, 1) 0s;
    -ms-transition: all 0.5s cubic-bezier(0.7, 0, 0.3, 1) 0s;
    cursor: pointer;
  }
  .gh.selected {
    transform: rotate(90deg);
    -webkit-transform: rotate(90deg);
    -ms-transform: rotate(90deg);
    -moz-transform: rotate(90deg);
  }
  .gh a {
    display: block;
    height: 2px;
    margin-top: -2px;
    position: relative;
    top: 50%;
    transition: all 0.3s cubic-bezier(0.7, 0, 0.3, 1) 0s;
    -webkit-transition: all 0.3s cubic-bezier(0.7, 0, 0.3, 1) 0s;
    -ms-transition: all 0.3s cubic-bezier(0.7, 0, 0.3, 1) 0s;
    width: 60%;
    margin: 0 20%;
    background: #000;
  }
  .gh a:after,
  .gh a:before {
    content: "";
    display: block;
    height: 2px;
    left: 0;
    position: absolute;
    transition: all 0.3s cubic-bezier(0.7, 0, 0.3, 1) 0s;
    -webkit-transition: all 0.3s cubic-bezier(0.7, 0, 0.3, 1) 0s;
    -ms-transition: all 0.3s cubic-bezier(0.7, 0, 0.3, 1) 0s;
    width: 100%;
    background: #000;
  }
  .gh a:after {
    top: 8px;
  }
  .gh a:before {
    top: -8px;
  }
  .gh.selected a:after,
  .gh.selected a:before {
    top: 0;
  }
  .gh.selected a:before {
    transform: translateY(0px) rotate(-45deg);
    -webkit-transform: translateY(0px) rotate(-45deg);
    -ms-transform: translateY(0px) rotate(-45deg);
  }
  .gh.selected a:after {
    transform: translateY(0px) rotate(45deg);
    -webkit-transform: translateY(0px) rotate(45deg);
    -ms-transform: translateY(0px) rotate(45deg);
  }
  .gh.selected a {
    background-color: transparent !important;
  }
  .header .header-top .left {
    display: none;
  }
  .header .header-top .right {
    width: 100%;
  }
  .header .header-top .right ul {
    -webkit-box-pack: center;
        -ms-flex-pack: center;
            justify-content: center;
    height: 36px;
  }
  .header .header-top .right li {
    margin: 0;
  }
  .header .header-top .right li img {
    height: 20px;
  }
  .header .header-bd .logo {
    padding: 10px 0;
  }
  .header .header-bd .logo img {
    height: 40px;
  }
  .header .nav {
    display: none;
    position: fixed;
    top: 66px;
    right: -80%;
    bottom: 0;
    width: 80%;
    background: #fff;
    z-index: 999;
  }
  .header .nav ul {
    display: block;
    font-size: 14px;
    line-height: 40px;
  }
  .header .nav li {
    margin: 0;
    text-align: left;
    text-indent: 2em;
    width: 100%;
  }
  .header .nav li .icon {
    top: 0;
    right: 0;
    -webkit-transform: translate(0);
            transform: translate(0);
    width: 50px;
    height: 40px;
    background-size: 14px;
  }
  .header .nav li .childer {
    position: static;
    -webkit-transform: translate(0);
            transform: translate(0);
    background: #f8f8f8;
    color: #333;
    text-indent: 4em;
  }
  .header .nav li .childer dd {
    font-size: 12px;
  }
  .video-exhibition .wrapper {
    -ms-flex-wrap: wrap;
        flex-wrap: wrap;
  }
  .video-exhibition .video-wrap {
    margin-bottom: 20px;
    display: block;
    width: 100%;
    height: auto;
  }
  .video-exhibition .video-wrap .img {
    border-width: 2px;
  }
  .video-exhibition .video-wrap .img::before {
    width: 40px;
    height: 40px;
  }
  .video-exhibition .video-wrap .big-video {
    margin-bottom: 15px;
    padding: 0;
    width: 100%;
    height: 210px;
  }
  .video-exhibition .video-wrap .big-video li {
    height: auto;
  }
  .video-exhibition .video-wrap .big-video li .img {
    border-width: 2px;
  }
  .video-exhibition .video-wrap .video-item {
    width: 100%;
    height: auto;
  }
  .video-exhibition .video-wrap .video-item li {
    height: auto;
  }
  .video-exhibition .video-wrap .video-item .img::before {
    width: 25px;
    height: 25px;
  }
  .video-exhibition .video-desc {
    padding: 0;
    width: 100%;
  }
  .video-exhibition .video-desc .title .icon {
    margin-right: 15px;
  }
  .product .bd ul {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: wrap;
        flex-wrap: wrap;
    -webkit-box-pack: justify;
        -ms-flex-pack: justify;
            justify-content: space-between;
    margin: 0;
  }
  .product .bd li {
    margin: 0 0 10px 0;
    width: 49%;
  }
  .product .bd li a {
    padding: 0;
    width: 80px;
    line-height: 30px;
  }
  .product .bd li .txt {
    padding: 5px 10px 10px;
  }
  .news .bd ul {
    display: block;
  }
  .news .bd li {
    margin-bottom: 15px;
    width: 100%;
  }
  .news .bd li h4 {
    font-size: 14px;
  }
  .news .bd li .item .tit {
    font-size: 14px;
  }
  .news .bd li .more a {
    width: 78px;
    line-height: 26px;
    font-size: 12px;
  }
  .news .bd li .img {
    height: auto;
  }
  .news .bd li .img img {
    position: static;
    -webkit-transform: translate(0);
            transform: translate(0);
  }
  .news .bd li {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
  }
  .news .bd li .img {
    width: 50%;
  }
  .news .bd li img {
    width: 100%;
  }
  .news .bd li h4 {
    margin: 0 0 5px 0;
  }
  .news .bd li h4,
  .news .bd li p {
    text-overflow: ellipsis;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    word-break: break-all;
    overflow: hidden;
    display: -webkit-box;
  }
  .news .bd li .txt {
    padding: 0 ;
    padding-left: 10px;
    -webkit-box-flex: 1;
        -ms-flex: 1;
            flex: 1;
  }
  .link .hd {
    font-size: 18px;
  }
  .link .bd ul li {
    font-size: 12px;
  }
  .link .bd ul li .img {
    width: 40px;
  }
  .g-hd {
    font-size: 18px;
  }
  .footer {
    padding: 15px 0;
    font-size: 14px;
  }
}