@media screen and (max-width:770px) {
  .head, .head .head_r, .i_ma, .i_mb, .i_mc, .i_md, .bq, .foot, .i_me, .scd {
    width: 320px;
    margin: 0px auto;
  }

  .head {
    position: relative;
  }

  .head .logo img, .head .logo {
    max-width: 100%;
  }

  .head .logo {

    width: 100%;
  }
  .head .logo_ab{
    position: absolute;
    left: 0;
    top: 0;
  }
  .head .logo_ab img{
    max-width: 119px;
    max-height: 81px;
  }
  .r_top span {
    font-size: 12px;
  }

  .r_top .search {
    width: 190px;
    margin-top: 10px;
  }

  .head .nav {
    margin-top: 50px;
    text-align: left;
  }

  .head .nav li a {
    width: 103px;
    padding: 0;
    text-align: center;
  }
  .pro_right{
    width: 100%;
  }
  .pro-img-small{
    width: 320px;
  }
  .scd_r .scd_m .pro-img-small img{
    max-width: 100%;
  }
  .head .nav li {
    margin: 0px;
  }

  .banner {
    height: auto;
  }

  .flexslider .slides > li {
    overflow: visible;
  }

  .flexslider .slides img {
    width: 100%;
    height: auto;
    margin-left: 0px !important;
  }

  .i_ma .i_mal, .i_ma .i_mar {
    width: 100%;
  }

  .i_ma .i_mal {
    margin-bottom: 20px;
  }

  .i_mal .box_m {
    line-height: 185%;
  }

  .i_mar .box_m {
    height: auto;
    margin-bottom: 10px;
  }

  .i_mar .box_m embed {
    width: 320px;
    height: 170px;
  }

  .bg_a, .bq_bg, .banner_s, .banner {
    min-width: 320px;
  }
  .f_bg{display: none;}
  .i_mb ul.block-1 li {
    width: 100%;
    text-align: center;
  }
  .i_mb ul.block-2 li {
    width: 49%;
    margin-right: 1%;
    text-align: center;
  }
  .i_mb ul.block-2 li:nth-child(2n+3){
    clear: both;
  }
  .i_mb ul.block-3 li {
    width: 32%;
    margin-right: 1%;
    text-align: center;
  }
  .i_mb ul.block-3 li p{font-size: 14px;}
  .i_mb ul.block-3 li:nth-child(3n+4){
    clear: both;
  }
  .i_mc ul li {
    float: none;
    margin: 0px auto !important;
    margin-top: 75px !important;
  }

/*  .i_md ul {
    height: 866px;
    overflow: hidden;
  }*/

  .i_md ul li {
    width: 100%;
    margin-right: 0;
  }

/*  .i_md ul li img {
    width: 320px;
    height: 343px;
  }
*/
  .i_mc ul li {
    width: 318px;
  }

  .i_mc ul li .tu {
    left: 110px;
  }

  .i_mb ul li img {
    width: 320px;
    height: 384px;
  }

  .foot .f_nav {
    width: 100%;
  }

  .foot .f_code {
    width: 100%;
    position: static;
    margin-top: 20px;
  }

  .f_nav li {
    width: 103px;
    margin-left: 0px;
  }
  .f_nav li:nth-child(3n+4){
    clear: both;
  }

  .foot .f_code p {
    text-align: left;
  }

  #focus_Box {
    display: none;
  }

  .sj_sp {
    display: block;
  }

  .banner_s, .banner_s img {
    width: 100%;
    height: auto;
    margin-left: 0px !important;
  }

  .scd .scd_l {
/*    width: 100%;
    background-size: 100%;
    height: auto;
    padding-bottom: 20px;*/
    display: none;
  }

  .scd_l .s_nav li {
    width: 280px;
    background-repeat: repeat-x;
  }

  .scd_l .s_nav li a {
    width: 241px;
  }

  .scd .scd_r {
    width: 100%;
  }

  .scd_r .r_title {
    font-size: 24px;
    padding-top: 20px;
  }

  .scd_r .scd_m {
    overflow: hidden;
  }

  .scd_r .scd_m img {
    max-width: 320px;
    height: auto;
  }

  .pro li img, .pro li {
    width: 318px;
    margin-right: 0px;
  }

  .pro li .des {
    width: 320px;
    bottom: -1px;
  }

  .pages a {
    font-size: 14px;
  }

  .news dl dt{
    width: 100%;
    height: auto;
    text-align: center;
  }
  .news dl dt img {
    max-width: 100%;
  }

  .news dl dd {
    width: 100%;
    margin-top: 5px;
  }

  .news dl dd .title em {
    font-size: 12px;
  }

  .service dt, .service dd {
    width: 100%;
    height: auto;
  }

  .service dt {
    margin-bottom: 20px;
  }

  .contact dl dt {
    width: 100%;
    margin-right: 0;
    text-align: center;
  }

  .contact dl dd {
    width: 100%;
    line-height: 180%;
  }

  .contact dl dd p {
    margin-bottom: 10px;
  }
  .news-cover i{
    padding-bottom: 35%;
  }

}