*{
    margin: 0 auto;
    padding: 0;
    font-family:"Tahoma","Arial","Verdana"
}
body,html{
    width: 100%;
    height: 100%;
    background-color: #ffffff;
    font-family:"Tahoma","Arial","Verdana";
}
.main {
    width: 100%;
    height: 100%;
}
/*导航*/
.PolularScience_panle_one {
    width: 100%;
    height: 50px;
    background-color: #161F5F;
}

.PolularScience_nav {
    width: 1200px;
    height: auto;
}

.PolularScience_lp_a {
    background-color: #146DC3;
}

.PolularScience_panle_one ul li {
    min-width: 90px;
    height: 100%;
    text-align: center;
    list-style: none;
    float: left;
    position: relative;
    padding: 0 3px;
    padding-top: 10px;
}

.PolularScience_panle_one a {
    width: auto;
    height: 30px;
    display: block;
    text-decoration: none;
    cursor: pointer;
    color: #FFFFFF;
    line-height: 30px;
    border-radius: 10px;
    padding: 0 10px;
}
    .PolularScience_panle_one a:hover {
        background-color: #146DC3;
    }
    @font-face {
        font-family: "iconfont";
        src: url('../fonts/iconfont.eot'); /* IE9*/
        src: url('../fonts/iconfont.eot#iefix') format('embedded-opentype'), /* IE6-IE8 */
        url('../fonts/iconfont.woff') format('woff'), /* chrome, firefox */
        url('../fonts/iconfont.ttf') format('truetype'), /* chrome, firefox, opera, Safari, Android, iOS 4.2+*/
        url('../fonts/iconfont.svg#iconfont') format('svg'); /* iOS 4.1- */
    }

    .iconfont {
    font-family: "iconfont" !important;
    font-size: 16px;
    font-style: normal;
    -webkit-font-smoothing: antialiased;
    -webkit-text-stroke-width: 0.2px;
    -moz-osx-font-smoothing: grayscale;
}
#langDiv{width:100%;text-align:right;background-color: #E8F3FD;padding: 4px;padding-right:15px;font-size:12px;}
#langDiv a:hover {
    text-decoration:underline;
}
.p_1 {
    width: 100%;
    height: 90px;
    background-color: #E8F3FD;
    overflow: hidden;
    min-width:1200px;
}

.p_2 {
    width: 100%;
    height: 66px;
    background-color: #161F5F;
    padding-top: 10px;
    padding-left: 20px;
    min-width:1200px;
}

.p_3 {
    width: 100%;
    background-color: #A2CDF9;
}

.p_1_left {
    float: left;
    margin-left: 20px;
}

.nav {
    float: right;
    margin-right:10px;
}

    .nav ul li {
        height: 100%;
        text-align: center;
        list-style: none;
        float: left;
        position: relative;
        margin: 0 10px;
    }

    .nav a {
        width: auto;
        height: 65px;
        display: block;
        text-decoration: none;
        cursor: pointer;
    }

        .nav a img {
            height: 28px;
            margin-top: 5px;
        }

        .nav a span {
            font-size: 12px;
            color: #87B2E3;
        }

        .nav a:hover span {
            color: #476CB8;
        }

.sjx {
    width: 0;
    height: 0;
    border-width: 0 8px 8px;
    border-style: solid;
    border-color: transparent transparent #161F5F;
    /*position: absolute;*/
    /*bottom: 0px;*/
    /*right: 15%;*/
    margin: 0 auto;
    margin-top: 5px;
    display:none;
}
.nav_a_li_current .sjx{
    display:block;
}

.nav_a_li_current span{
    color:#161F5F
}