header .content-header {
    position: fixed;
    top: 0;
    left: 0;
    margin: 0 auto;
    padding: 0 70px 0 270px;
    min-height: auto;
    line-height: 100px;
    height: 100px;
    background-color: #000;
    width: 100%;
    text-align: center;
    z-index: 1210;
}
.content-header .container {
    width: auto;
    padding: 0;
}
.main-navigation {
    height: 100%;
    width: 100%;
}
.main-navigation .navbar {
    height: 100%;
    background-color: transparent;
}
.site-header{height: 83px;width: 1200px;}
.navbar {
    position: relative;
    min-height: 50px;
     margin-bottom: 0px; 
    border:none;
}
.navbar-brand {
    background:url('../images/logo.jpg') no-repeat center center;
    width: 270px;
    min-height: 81px;
}
.navbar-nav li {
    text-align: center;
    float: left;
    padding:40px 0 0px 0;
    margin-left: 47px;
}
.navbar-nav li a{
    display: inline-block;
    color: #777;
    height: 40px;
    border-bottom: 3px solid #36b9fc;
}

.navbar-nav .activer{border-bottom: 3px solid #36b9fc!important;}
.navbar-nav li img{float:left;margin-top:2px;margin-right:5px; height: 13px;width: 12px; }
.navbar-nav li a{float:left;padding:0;font-size: 14px;}
.navbar-nav li a{border-bottom: 3px solid #fff; }
.navbar-nav li:nth-child(4) img{float:left;margin-top:4px;margin-right:5px;  }
.navbar-nav li:nth-child(6) img{float:left;margin-top:4px;margin-right:5px;  }
/*给图片加阴影*/
.kechenkind_section .common2:hover{box-shadow:0px 5px 5px 3px #e8e8e8;transition: all 0.5s;}
.data_commom1 a{overflow: hidden;}
.data_commom1 img:hover{transform: scale(1.2);transition: all 0.8s;}
.data_commom1 img{transition: all 0.8s;}
.kechenkind_section .common2{transition: all 0.5s;}
/*响应式调整*/
@media only screen and (min-width:1200px) {
    .navbar-nav li a{float:left;padding:0;font-size: 15px;}
}
@media only screen and (max-width:1200px) {
    .center{width:100%!important;}
    .site-header{height: 81px;width: 100%;}
    .navbar-toggle{margin-top:24px; }
}
@media screen and (min-width:930px) and (max-width:1200px){
  .container {width: 100% !important;}
  .navbar-nav li {
    text-align: center;
    float: left;
    padding:40px 0 23px 0;
    margin-left: 16px;
    }
}


@media only screen and (width:768px){
    .common2:nth-child(2n+1) {
    margin-bottom: 28px;
    border: 1px solid #eceaea;
    margin-left: 30px;
    margin-right: 130px;
    padding: 0 !important;
    width: 273px;
    height: 250px;
    border-radius: 10px;
    }
    
.navbar-nav li a{
    
    color: #777;
    height: 40px;
    /*border-bottom: 3px solid #36b9fc;*/
}

}
@media screen and (min-width:768px) and (max-width:930px){
  .container {width: 100% !important;}

  .navbar-nav li {
    text-align: center;
    float: left;
    padding:40px 0 23px 0;
    margin-left: 6px;
}
.navbar-brand{width:200px;}
.navbar-brand{background-size:200px auto;}
.navbar-nav{padding-left: 30px;}
}
@media screen and (max-width: 820px) and (min-width: 768px){
    .navbar-nav li img {
            margin-right: 5px;
    }
    .navbar-nav li {
        text-align: center;
        float: left;
        padding:40px 0 23px 0;
        margin-left: 2px;
        }
        .navbar-nav li a {
            float: left;
            padding: 0;
            font-size: 12px;
        }
    
       .navbar-nav li img {
                float: left;
                margin-top: 2px;
                margin-right: 5px;
                height: 12px;
                width: 11px;
       }
}
@media only screen and (max-width:767px){
    /*下拉菜单*/
	
	.navbar-nav li img {
    display:none;
}
    .navbar-nav li a{padding:0;font-size: 14px;}
    .navbar-collapse{position: absolute;top:54px; right: 0px;z-index: 1;}
    .navbar-collapse  .navbar-nav{padding:0;margin-bottom:20px;}
    .data_commom1 img{width: 100%;}
    .navbar-default .navbar-collapse{
        background: #fff;
        width:98px;
        
    }
    .navbar-nav li a{border-bottom: 1px solid #f2f2f2; }
    .navbar-nav .activer{border-bottom: 1px solid #36b9fc!important;}
    .navbar-default .navbar-toggle:focus, .navbar-default .navbar-toggle:hover{
        background-color: #fff;
    }
    .navbar-nav li {
    width:100%; 
    display: block;
    text-align: center;
    float: left;
    padding:10px 0 0px 0;
    margin-left: 0px !important;
}
.navbar-nav {
    margin: 0;
}
.navbar-nav li a {
    
    height: 30px;
   width: 100%;
}
}
@media only screen and (max-width:420px){
    .newbook_title img{width: 100%;}
    .kechenkind_section .common2{width: 100%; height: auto;}
    .kechenkind_section .common2 img{width: 100%;}
}
@media only screen and (max-width:370px){
/*上面的图标logo*/
.navbar-brand{
    width: 70%;
    background-size:auto 32%;
}
.newbook_title span {
    font-size: 18px !important;
    position: absolute;
    top: 52px !important;
    left: 6px;
  }
}
@media only screen and (max-width:320px){

}
@media only screen and (max-width:767px){
.navbar-default .navbar-collapse, .navbar-default .navbar-form {
    border: 1px solid #e6e6e6 !important;
}}