.contentHead{
    width: 100%;
    height: 56px;
    margin-top: 20px;
}

.contentHeadLogo{
    width: 224px;
    height: 64px;
    float: left;
    margin-bottom: 6px;
}

.nav_title_ul{
    text-align: center;
    margin-left: 144px;
    margin-top: 24px;
    display: -webkit-flex; /* Safari */
    display: flex;
    flex-direction: row;
}

.nav_title{
    text-align: center;
    padding:10px 10px;
    float: left;
    color: #333333;
    position: relative;
    cursor: pointer;
    font-size: 14px;
    font-family: "Hiragino Sans GB", "Microsoft Yahei", "微软雅黑", "Simsun","宋体", "Arial";
}

.nav_title_wrap{
    float: left;
}

.nav_title .er_code{
    display: none;
    width: 100px;
    position: absolute;
    z-index: 100;
    background: #fff;
    border: 1px solid #e3e3e3;
    padding: 10px;
    left: 15px;
    top: 35px;
}

.nav_title .er_code img{
    display: block;
    width: 80px;
    height: 80px;
    margin:0 auto;
}
.nav_title .er_code span{
    width: 100px;
    display: block;
    text-align: center;
    font-size: 12px;
}

#eduNav .icon{
    width: 24px;
    height: 18px;
    float: left;
    background: url('http://n.sinaimg.cn/edu/index/images/pages/nav_title.png') -50px -10px no-repeat;
    transform: scale(0.5);
    -ms-transform: scale(0.5);     /* IE 9 */
    -moz-transform: scale(0.5);    /* Firefox */
    -webkit-transform: scale(0.5); /* Safari 和 Chrome */
    -o-transform:scale(0.5);  /* Opera */

}
#wapNav .icon, #publicNav .icon{
    width: 20px;
    height: 28px;
    float: left;
    margin-top: -4px;
    background: url('http://n.sinaimg.cn/edu/index/images/pages/nav_title.png') -10px -10px no-repeat;
    transform: scale(0.5);
    -ms-transform: scale(0.5);     /* IE 9 */
    -moz-transform: scale(0.5);    /* Firefox */
    -webkit-transform: scale(0.5); /* Safari 和 Chrome */
    -o-transform:scale(0.5);  /* Opera */
}
#weiboNav .icon{
    width: 34px;
    height: 26px;
    float: left;
    margin-top: -2px;
    background: url('http://n.sinaimg.cn/edu/index/images/pages/nav_title.png') -94px -10px no-repeat;
    transform: scale(0.5);
    -ms-transform: scale(0.5);     /* IE 9 */
    -moz-transform: scale(0.5);    /* Firefox */
    -webkit-transform: scale(0.5); /* Safari 和 Chrome */
    -o-transform:scale(0.5);  /* Opera */
}
#weixinNav .icon{
    width: 32px;
    height: 28px;
    float: left;
    margin-top: -2px;
    background: url('http://n.sinaimg.cn/edu/index/images/pages/nav_title.png') -146px -10px no-repeat;
    transform: scale(0.5);
    -ms-transform: scale(0.5);     /* IE 9 */
    -moz-transform: scale(0.5);    /* Firefox */
    -webkit-transform: scale(0.5); /* Safari 和 Chrome */
    -o-transform:scale(0.5);  /* Opera */
}