@media screen and (max-width:1150px){
.header .head,.i_ma ul,.i_mb ul,.i_md .i_mdm,.i_me ul li dl,.i_mf .i_mfm,.i_mgm,.scd{width:960px; margin:0px auto;}
.head .nav{ width:555px; margin-left:25px;}
.head .nav li{ margin-right:3px;}
.i_ma ul li{ width:298px; margin-right:32px;}
.i_mb ul li{ width:303px; margin-right:25px;}
.i_mb ul li img{ width:303px; height:209px;}
.i_mc ul li img{ height:261px;}
.i_mdm .i_mdl, .i_mdm .i_mdr{ width:479px;}
.i_mdm ul{ width:449px;}
.i_mdl ul li .nr{ width:420px;}
.i_me ul li dl dd{ margin-left:60px;}
.i_mgm ul li{ width:294px;}
.i_mgm .i_book li{ width:470px;}
.scd .scd_r{ width:740px;}
.scd .scd_r .r_top p{ font-size:40px;}
.scd .scd_r .scd_rm{ width:700px;}
.pro dl dd{ width:450px;}
.pro dl dd .title a{ font-size:18px;}
.demo ul li{ width:342px; margin-right:15px;}
.demo ul li embed{ width:342px; height:259px;}
.case dl dd{ width:440px;}
}
@media screen and (max-width:990px){
.header .head,.i_ma ul,.i_mb ul,.i_md .i_mdm,.i_me ul li dl,.i_mf .i_mfm,.i_mgm,.scd{width:740px;}
.head .nav{ display:none; position:absolute; background:#FFF; 
top:50px; left:0px; z-index:9999; width:100%; margin:0px;}
.head .nav li{ margin-right:35px;}
.head .nav li a{ color:#000;}
.head{ position:relative;}
.nav_m .n_icon{ display:block;}
.head .nav_m{ display:block; position:absolute; right:0px; top:20px; z-index:99999; width:100%;}
.head .lang{ margin-left:30px; }
.head .search{ float:left; margin-left:30px;}
.head .lang,.head .search,.head .logo{ position:relative; z-index:999999;}
.i_name{ font-size:30px;}
.i_name p{ font-size:16px;}
.i_ma ul li{ width:233px; margin-right:20px;}
.i_ma ul li .tu img,.i_ma ul li .tu{ width:170px; height:170px;}
.i_mb ul li{ width:236px; margin-right:15px;}
.i_mb ul li img{ width:236px; height:162px;}
.i_mc ul li img{ height:203px;}
.i_mdm .i_mdl, .i_mdm .i_mdr{ width:100%; margin-top:-1px;}
.i_mdm ul{ width:92%;}
.i_mdl ul li .nr{ width:90%;}
.i_me ul li dl dd{ width:545px; margin-left:40px;}
.i_me ul li dl dt{ font-size:30px;}
.i_mgm ul li{ width:236px; margin-right:15px;}
.i_mgm .i_book li{ width:360px;}
.scd .scd_r{ width:520px;}
.scd .scd_r .scd_rm{ width:490px;}
.pro dl dt,.pro dl dt img{ width:191px; height:131px;}
.pro dl dd{ width:285px; margin-right:0px;}
.pro dl dd .title a{ font-size:16px;}
.demo ul li{ width:240px; margin-right:10px;}
.demo ul li embed{ width:240px; height:181px;}
.case dl dt, .case dl dt img{ width:192px; height:125px;}
.case dl dd{ width:290px;}
.case dl dd .des{ height:60px; line-height:155%;}
}
@media screen and (max-width:770px) {
.header .head,.i_ma ul,.i_mb ul,.i_md .i_mdm,.i_me ul li dl,.i_mf .i_mfm,.i_mgm,.scd{width:480px; margin:0px auto;}
.head .lang,.head .search{ margin-left:12px;}
.head .nav li{ width:100%; height:35px; line-height:35px;}
.head .nav li a{ display:block; width:90%; padding:0 5%;}
.i_ma ul li,.i_mb ul li{ width:153px; margin-right:10px;}
.i_ma ul li .tu img, .i_ma ul li .tu{ width:140px; height:140px;}
.i_mb ul li img{ width:153px; height:105px;}
.i_mc ul li img{ height:131px;}
.i_mb ul li .title{ font-size:13px;}
.i_mdm ul{ height:auto;}
.i_me ul li dl dt{ font-size:24px; width:85px;}
.i_me ul li dl dd{ width:345px; margin-left:20px;}
.i_mgm ul li{ width:150px;}
.i_mgm .i_book li{ width:230px;}
.scd .scd_l{ width:460px;}
.scd .scd_r{ width:100%; padding-top:0px; margin-top:20px;}
.scd .scd_r .r_top{ position:static;}
.scd .scd_r .scd_rm{ width:460px;}
.pro dl dd{ width:258px;}
.scd .scd_r .r_top p{ font-size:30px;}
.demo ul li{ width:100%; margin-right:0px;}
.demo ul li embed{ width:460px; height:346px;}
.case dl dd{ width:260px;}
}
@media (min-width : 320px) and (max-width : 767px)  {
.i_ma ul,.i_mb ul,.i_md .i_mdm,.i_me ul li dl,.i_mf .i_mfm,.i_mgm,.scd{width:100%; margin:0px auto;}
	.header .head{width:80%;margin-left:0px;float: left;}
	.head .logo .logo_font {
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 2px;
    color: #fff;
    line-height: 80px;
    font-family: Baskerville, "Palatino Linotype", Palatino, "Century Schoolbook L", "Times New Roman", "serif";
}
.header .btn_bar{display: block;width:20%;float:left;
    margin: 0;
    padding: 0;
  background: #5a2fad;}
	.btn-navbar {
    position: absolute;
    width: 60px;
    height: 60px;
    padding: 18px 0;
    display: block;
    z-index: 1;
}
	.btn-navbar .icon-bar {
    display: block;
    width: 32px;
    height: 3px;
    background-color: #fff;
    margin: 8px auto;
}
.nav_l{display: none; width:50%;float: none;padding: 20px 40px;}
.nav_l ul li a{color: #fff;}
.head .lang{ float:right; margin-left:0px; margin-top:15px;}
.header .head{border-bottom: 0px;
}
.head .logo{width:100%;position:absolute; left:0px; top:0px; z-index:9999;}
.head .logo a{font-size:12px;}
.head .search{ margin-top:70px; margin-left:0px;}
.head .nav_m .nav{ display:none;}

.why_title{width:480px;}
#about{ width:100%; padding:12px 2px 12px;}
.sec-title span{ font-size:36px; }
.sec-title{ font-size:36px; }
.head .nav li a,.head .lang .lang_m span{ color:#333;}
.head .lang .lang_m em{background:url(../images/icon1_1.png) no-repeat;}
.nav_m .n_icon{ color:#000; background:url(../images/nav_ico_a.png) no-repeat left center;}
.head .nav{ top:35px;}
.about-content{margin:0px 40px;}
.banner{padding:0px; margin:80px auto 0px;}
.guitai_icon p{ text-align:center;}
.i_name{ font-size:24px;}
.i_ma ul li, .i_mb ul li{ width:100%; margin-right:0px; margin-bottom:30px;}
.i_ma ul li .tu img, .i_ma ul li .tu{ width:160px; height:160px;}
.i_mb ul li img{ width:320px; height:219px;}
.i_mc ul li img{ height:273px;}
.m_bg_a{ background:url(../images/bg_b.jpg) no-repeat; background-size:cover;}
.i_me ul li dl dt{ width:70px; font-size:20px;}
.i_me ul li dl dt p{ font-size:12px;}
.i_me ul li dl dd{ width:215px; margin-left:7px;}
.i_mg{ background:url(../images/bg_d.jpg) no-repeat; background-size:cover;}
.i_mgm ul li{ width:100%; margin-bottom:25px; margin-right:0px;}
.i_mgm ul li.one, .i_mgm ul li.one p{ text-align:center;}
.i_mgm ul li.one img{ margin:0px;}
.i_mgm .i_book li{ width:100%;}
.scd .scd_l{ width:300px;}
.scd .scd_r .r_top p{ font-size:20px;}
.scd .scd_r .scd_rm{ width:300px;}
.pst p{ font-size:16px;}
.demo ul li embed{ width:300px; height:225px;}
.pro dl dd{ width:100%;}
.pro dl dt, .pro dl dt img{ width:296px; height:203px;}
.banner_s{ margin-top:105px;}
.case dl dd{ width:100%;}
.case dl dt, .case dl dt img{ width:300px; height:195px;}
}