@media screen and (max-width: 640px) {
  .m-nav .inner {
    position: relative;
    height: 55px;
    margin: 0 auto;
  }
  .m-nav .logo {
    padding-top: 8px;
  }
  .m-nav .logo img {
    width: 60%;
    height: 60%;
  }
  .m-nav .hambtn {
    cursor: pointer;
    margin-top: 15px;
  }
  .m-nav .hambtn img {
    width: 60%;
    height: 60%;
  }
  .m-nav .menu {
    overflow: hidden;
    display: none;
    position: absolute;
    z-index: 200;
    top: 55px;
    left: 0;
    width: 100%;
    padding: 0;
  }
  .m-nav .menu .bg {
    position: absolute;
    z-index: -1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-repeat: no-repeat;
    background-position: center -55px;
    background-size: auto 290px;
    filter: blur(8px);
  }
  .m-nav .menu li {
    display: block;
    float: left;
    width: 50%;
    height: 50px;
    border-bottom: none;
    border-top: 1px solid #FFF;
    border-right: 1px solid #FFF;
    margin-top: -1px;
    padding: 0;
  }
  .m-nav .menu li:hover {
    border-bottom: none;
    background: none;
  }
  .m-nav .menu li:nth-child(2n+1) {
    border-right: 0;
  }
  .m-nav .menu li a {
    position: relative;
    height: 50px;
    padding-top: 6px;
    line-height: 1.3;
    font-size: 14px;
    color: #FFF;
  }
  .m-nav .menu li a::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 10px;
    width: 15px;
    height: 15px;
    margin-top: -7px;
    background: url(/Content/images/common/icon-right.png) no-repeat center center;
    background-size: contain;
  }
  .m-nav .menu .on {
    border-bottom: none;
  }
  .m-carousel {
    position: relative;
    overflow: hidden;
    height: 290px;
  }
  .m-carousel ul {
    list-style: none;
    height: 100%;
    padding: 0;
  }
  .m-carousel li {
    float: left;
    width: 100%;
    height: 100%;
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
  }
  .m-carousel li a {
    display: block;
    width: 100%;
    height: 100%;
  }
  .unslider .unslider-arrow.prev {
    left: 20px;
  }
  .unslider .unslider-arrow.next {
    right: 20px;
  }
  .m-footer {
    padding: 0;
  }
  .m-footer ul {
    padding: 30px 0;
    background: #414141;
  }
  .m-footer .cr {
    padding: 20px 1rem;
    border-top: none;
    background: #363636;
  }
  .m-footer .cr > span {
    display: block;
    margin: 0;
    text-align: center;
  }
  .m-product .bg {
    display: none;
  }
  .m-news .news-title {
    padding-top: 10px;
  }
  .m-maomao .vid-wrap {
    overflow: hidden;
    height: auto;
    margin: 40px 0;
    padding: 40px 0;
    background-repeat: no-repeat;
    background-position: center top;
    background-size: 100% 100%;
    text-align: center;
  }
  .m-maomao .poster {
    position: relative;
    box-sizing: border-box;
    margin: 0;
  }
  .m-maomao .poster img {
    max-width: 80%;
    border-width: 8px;
    border-radius: 10px;
  }
  .m-maomao .play {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 60px;
    height: 60px;
    margin: -30px 0 0 -30px;
    border-radius: 30px;
    background: url(/Content/images/maomao/icon-play.png) no-repeat;
    background-size: cover;
    cursor: pointer;
  }
  .m-news-detail .detail {
    padding-top: 40px;
    padding-bottom: 160px;
    font-size: 16px;
    line-height: 2;
    text-indent: 0;
  }
  .m-news-detail .detail p {
    text-align: justify;
  }
  .m-news-detail .detail img {
    max-width: 100%;
  }
}