main{
    width:100%;
    /* height:4000px; */
    background:#fff;
}
header{
    height:auto;
    width:100%;
    background:#fff;
    position: relative;
}

.flexslider{
    height:auto;
}
.hbja {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 210px;
    opacity: 0.9;
    background: url("https://www.qalib.net/__xh__/mathedu.bnu.edu.cn/images/bgrad_1.png") center top repeat-x;
    z-index:10;
}
nav{
    width:100%;
    position: absolute;
    top:0;
    left:0px;
    z-index:11;
}
.navf{
    width:1200px;
    margin:0 auto;
    position:relative;
}
.navftwo{
    float:right;
    color:#fff;
    position:absolute;
    right:14px;
    top:12px;
}
.navftwo a {
    color: #fff;
    font-size: 14px;
    height: 21px;
    line-height: 21px;
    display: block;
    float: left;
}
.searcht{
    background:rgba(255,255,255,0);
    border:1px solid #eee;
    color:#fff;
    text-indent:8px;
    border-radius:10px;
    outline:none;
    height:19px;
    line-height:19px;
    width: 180px;
}
.searbtn{
    position:absolute;
    top:4px;
    right:10px;
    color:#fff;
}
.navs{
    /*overflow:hidden;*/
    float:right;
    margin-top: 40px;
}
.navs li{
    float:left;
    position:relative;
}
.navs li a{
    display:block;
    padding:17px 15px;
    color:#fff;
    font-size:16px;
    /* transition: all .2s linear; */
}
.navs li a:hover{
    border-bottom:1px solid #fff;
    padding:17px 15px;
}
.navs li:hover .navss{
    display:block;
    opacity:1;
}
.navss{
    transition: all .3s linear;
    display:none;
    opacity:0;
    width:180px;
    position:absolute;
    top:50px;
    left:0px;
    background:rgba(14, 54, 175, 0.7);
    border-top:1px solid #fff;
}
.navss li a{
    transition:all .3s linear;
}
.navss li a:hover{
    border:none;
    background:rgba(23, 29, 121, 0.8);
}
.navss li{
    float:none;
}
.logo{
    display:block;
    float:left;
    margin-top: 10px;
}
.topbar{
    position: absolute;
    bottom:-45px;
    left:0px;
    width:100%;
    /* height:80px; */   
}
.topbars{
    width:1200px;
    height:90px;
    margin:0 auto;
    box-shadow:0 3px 8px 1px #bbb;
    background:#fff;
}
.topbars li{
    background:url("https://www.qalib.net/__xh__/mathedu.bnu.edu.cn/images/tbbj.jpg");
    height:90px;
    width: 149px;
    border-right:1px solid #750000;
    color:#fff;
    float:left;
    transition: all .3s linear;
}
.jxjy-gg{
    width:161px!important;
}
.jxjy-ggs{
    width:145px!important;
}
.topbars li:hover{
    background:#fff;
    border-right:1px solid #fff;
    color:#900;
}
.tubiao{
    height:60px;
    width:100%;
    text-align:center;
    line-height:62px;
    font-size:30px;
}
.title{
    font-size:14px;
    text-align:center;
    line-height:14px;
}

footer{
    width:100%;
    height:160px;
    background: #1b508a;
    clear: both;
}
.footers {
    width: 1200px;
    height: 100%;
    margin: 0 auto;
    background: url("https://www.qalib.net/__xh__/mathedu.bnu.edu.cn/images/footer_bg.png") no-repeat right bottom 15px;
    overflow: hidden;
}
.fd-copy {
    background: #03162d;
    color: rgba(191, 190, 190, 0.9);
    height: 40px;
    line-height: 40px;
    font-size: 14px;
}

.wp2 {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}
.imgewm {
    display: block;
    float: left;
    width: 513px;
    margin-top: 41px;
}
.imgewm2 {
    display: inline-block;
    margin-top: 5px;
}
.ftzt{
    width: 347px;
    display: inline-block;
    margin-top: 25px;
}
.telephone {
    width: 315px;
    margin: 0 auto;
    color: #fff;
    margin-top: 57px;
    font-size: 14px;
    height: 25px;
    line-height: 25px;
}
.telephone1{
    width: 315px;
    margin: 0 auto;
    color: #fff;
    margin-top: 5px;
    font-size: 14px;
    height: 25px;
    line-height: 25px;
}


.m-section1 {
    position: relative;
    /* background: none; */
    background: #f3f6fb;;
}
.wp2 {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}
.m-section1 .section {
    /* height: 124px; */
    overflow: hidden;
    padding: 30px 0 50px;
}
.m-section1 .section .con {
    overflow: hidden;
}
.m-section1 .section .pic {
    display: block;
    width: 413px;
    height: 150px;
    overflow: hidden;
    float: left;
    margin-right: 39px;
    padding-top: 25px;
}
.m-section1 .section .pic img {
    display: block;
    width: 100%;
    height: 100%;
    -o-transition: .5s;
    -ms-transition: .5s;
    -moz-transition: .5s;
    -webkit-transition: .5s;
    transition: .5s;
}
.m-section1 .section .txt {
    overflow: hidden;
    line-height: 24px;
    color: #5d5e60;
    font-size: 15px;
    padding: 22px 0 22px 35px;
    border-left: 1px #d1d4d8 solid;
}
.m-section1 .section .txt a{
    text-align: justify;
    line-height: 29px;
    height: 145px;
    overflow: hidden;
    display: block;
}
.m-section1 .section h3 {
    margin-bottom: 6px;
}
.m-section1 .section h3 a {
    display: block;
    height: 30px;
    line-height: 30px;
    overflow: hidden;
    color: #000;
    font-size: 18px;
    font-weight: normal;
}
.m-section1 .section p{
    color: #c50000;
    display: inline-block;
    vertical-align: middle;
}
.m-section1 .title {
    font-size: 24px;
    line-height: 40px;
    height: 40px;
    padding-top: 45px;
    color: #333;
}
.m-section1 .title p{
    padding: 0 20px;
    color: #333;
    display: inline-block;
    letter-spacing: 2px;
}
.section-content .title {
    font-size: 24px;
    line-height: 40px;
    height: 40px;
    padding-top: 45px;
    color: #333;
}
.section-content .title p{
    padding: 0 20px;
    color: #333;
    display: inline-block;
    letter-spacing: 2px;
}
.indexTitle {
    position: absolute;
    left: 0;
    top: 35px;
    font-size: 25px;
    width: 25px;
    line-height: 32px;
    text-align: center;
    color: #333;
}
.indexTitle:before {
    content: "";
    display: block;
    position: absolute;
    width: 1px;
    height: 110px;
    left: 38px;
    top: 40px;
    background: #274372;
}
.ZControl{
    width: 95%;
    float: right;
}
.kstdc{
    overflow: hidden;
    margin-top: 10px;
    width: 1115px;
    float: right;
}
.kstdc li{
    float:left;
    width:22%;
    height:155px;
    background:#457bc5;
    color:#fff;
    margin-bottom:10px;
    margin-top:30px;
    font-size:18px;
    font-weight:bold;
    text-align:center;
    line-height:155px;
    transition: all 0.4s ease-out;
}
.kstdc li span{
    font-size: 18px;
    letter-spacing: 2px;
}
.kstdc li:hover{
    background:#1954a6;
    cursor:pointer;
}
.zcfgff{
    width:380px;
    margin-right:10px;
    margin-top:40px;
}
.kstdcs{
    margin-left: 45px;
}
li.kstdcs1{
    background:#f08200;
    margin-left: auto;
    margin-right: auto;
}
li.kstdcs2{
    background:#5ba06f;

}
li.kstdcs3{
    background:#dcbd11;
}
li.kstdcs4{
    background:#006aa6;
    float: right;
    margin-left: auto;
    margin-right: auto;
}
li.kstdcsts{
    background:#c75324;
    margin-left: auto;
    width: 260px;
    float: left;
    margin-right: 39px;
    margin-top: 15px;
    transition: all 0.4s ease-out;
    height: 159px;
}

.sublist ul li a:hover{
    color:#900;
    cursor:pointer;
}
.slide img{
    transition: all .3s linear;
}
.slide img:hover{
    transform: scale(1.05);
}

/*后加新闻板块样式*/

input::-webkit-input-placeholder, textarea::-webkit-input-placeholder {
    color:#fff;
}
input:-moz-placeholder, textarea:-moz-placeholder {
　　color:#fff;
}
input::-moz-placeholder, textarea::-moz-placeholder {
　　color:#fff;
}
input:-ms-input-placeholder, textarea:-ms-input-placeholder {
　　color:#fff;
}

.leftNav-item {
    position: fixed;
    right: 40px;
    bottom: 150px;
    z-index: 999999;
}
.leftNav-item ul{
    margin: 0;
    padding: 0;
}
.leftNav-item ul li {
    width: 50px;
    height: 50px;
    font-size: 16px;
    border-radius: 5px;
    background: #fff;
    color: #fff;
    text-align: center;
    margin: 5px 0;
    cursor: pointer;
    position: relative;
    transition: .5s;
    box-shadow: 0 2px 5px rgba(0,0,0,0.5);
}
.leftNav-item ul li i {
    color: #666;
    line-height: 50px;
    font-size:16px;
}

.leftNav-item ul li .rota {
    display: block;
    position: absolute;
    border-radius: 5px;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    margin: auto;
    -webkit-transform-origin: -50% 50%;
    transform-origin: -50% 50%;
    -webkit-transform: rotate3d(0,0,1,90deg);
    transform: rotate3d(0,0,1,90deg);
    -webkit-transition: -webkit-transform .3s ease-in;
    transition: transform .3s ease-in;
    opacity: 0;
    filter: alpha(opacity=0);
    background: #274372;
    color: #fff;
    text-align: center;
    line-height: 50px;
    font-size: 13px;
    text-decoration: none;
    padding: 2px 3px;
    box-sizing: border-box;
}

.leftNav-item ul li:hover .rota {
    -webkit-transform: rotate3d(0,0,1,0deg);
    transform: rotate3d(0,0,1,0deg);
    -webkit-transition-timing-function: ease-out;
    transition-timing-function: ease-out;
    opacity: .9;
    filter: alpha(opacity=90);
}

.leftNav-item ul li .title {
    position: absolute;
    right: -72px;
    top: 16px;
    height: 18px;
    line-height: 18px;
    font-size: 14px;
    text-align: left;
    padding: 3px 10px;
    background: rgba(0,0,0,0.5);
    color: #fff;
    border-radius: 8px;
}

.leftNav-item ul li .img-item {
    position: absolute;
    right: 65px;
    top: -30px;
    border: 1px solid #ccc;
    border-radius: 3px;
}

.leftNav-item ul li div img {
    max-width: 120px;
    display: block;
}

.leftNav-item ul li .text-item {
    position: absolute;
    left: 65px;
    top: 18px;
    border: 1px solid #ccc;
    border-radius: 3px;
    background: #fff;
    text-decoration: none;
    padding: 3px 8px;
    color: #444;
    font-size: 14px;
}

.leftNav-item ul li .text-item span {
    position: relative;
    padding-left: 15px;
    word-break:keep-all;
    white-space:nowrap;
}

.leftNav-item ul li .text-item span i {
    font-size: 14px;
    line-height: 24px;
    position: absolute;
    left: 0;
    top: -2px;
    color: #444;
}
.for-top {
    display: none;
}
.mode04{
    letter-spacing: 0.6px;
    width: 1200px;
    margin: 0 auto;
    clear: both;
    overflow: hidden;
    height: 240px;
    position: relative;
}
.mode04 .lf {
    width: 29.7%;
    float: left;
    height: 230px;
    margin-top: 45px;
    margin-bottom: 45px;
}
.mode04 .md {
    width: 40.6%;
    float: left;
    height: 230px;
    margin-top: 45px;
    margin-bottom: 45px;
}
.mode04 .rt {
    width: 29.7%;
    float: right;
    height: 230px;
    margin-top: 45px;
    margin-bottom: 45px;
}
.mode04 .mdInner {
    border-left: 2px solid #e1edfa;
    border-right: 2px solid #e1edfa;
    padding: 0 30px;
    margin: 0 30px;
    height: 230px;
}
.QuickLinks {
    background-color: #274372;
    margin-right: 43px;
    margin-left: 43px;
    padding: 30px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
.Quick {
    border: 1px solid #fff;
    padding: 16px;
    text-align: center;
}
.Quick a{
    display: block;
}
.Quick a img{
    width: 100%;
    max-width: 70px;
    display: block;
    margin: 0 auto;
    margin-top: 9px;
}
.Quick h3 {
    font-size: 19px;
    margin-top: 12px;
    letter-spacing: 2px;
    height: 30px;
    line-height: 30px;
}
.Quick h3 a{
    color: #ffffff;
}
.m-section2{
    width: 100%;
    overflow: hidden;
    background: #f3f6fb;
    padding-bottom: 45px;
}
.section-content {
    width: 1200px;
    margin: 0 auto;
    height: 100%;
    overflow: hidden;
}
.section-c1{
    margin-top: 35px;
}
.section-c1 ul {
    overflow: hidden;
    height: 345px;
}
.section-c1 ul li{
    width: 23%;
    display: inline-block;
    margin-left: 30px;
    height: 100%;
    position: relative;
    margin-top: 20px;
}
.section-c1 ul li:first-child{
    width: 23%;
    float: left!important;
    margin-left: 0;
}
.section-c1 ul li:last-child{
    width: 23%;
    float: right;
}
.section-c1 ul li a {
    display: block;
    overflow: hidden;
}
.section-c1 ul li .art-Img {
    display: block;
    height: 0;
    padding-bottom: 80%;
    overflow: hidden;
}
.section-c1 ul li .art-Img img {
    width: 100%;
    transition: all 0.3s ease;
    height: 198px;
}
.section-c1 ul li a:hover .art-Img img {
    transform: scale(1.1);
}
.section-c1 ul li .art-Txt {
    display: block;
    width: 83%;
    background: #fff;
    padding: 18px;
    margin-top: -65px;
    position: relative;
    z-index: 99;
    transition: all 0.3s ease;
}
.section-c1 ul li .art-Txt p {
    height: 70px;
    margin-bottom: 46px;
    font-size: 14px;
    line-height: 24px;
    overflow: hidden;
    text-align: justify;
}
.section-c1 ul li .art-Date:before {
    content: "";
    display: inline-block;
    width: 40px;
    height: 2px;
    background: #dddddd;
    position: absolute;
    /* left: 0; */
    right: 0;
    top: -19px;
}
.section-c1 ul li .art-Date {
    font-size: 14px;
    color: #4a5ad6;
    background: url("https://www.qalib.net/__xh__/mathedu.bnu.edu.cn/images/time.png") no-repeat left 125px center;
    padding-left: 22px;
    position: relative;
    display: inline-block;
    margin-top: 40px;
    height: 17px;
    line-height: 17px;
    width: 90%;
    text-align: right;
}
.section-c1 ul li .time {
    font-size: 16px;
    background: #fff;
    width: 98px;
    line-height: 38px;
    height: 38px;
    border-top: #095084 solid 1px;
    border-bottom: #095084 solid 1px;
    text-align: center;
    font-family: 'Candara',sans-serif;
    position: absolute;
    z-index: 10;
    left: 5px;
    right: auto;
    top: -20px;
    bottom: auto;
    color: #095084;
    letter-spacing: 1px;
    padding-left: 0;
}
.art-Txt a{
    height: 75px;
    float:left;
}
.tsa{
    margin-top: 40px;
    font-size: 14px;
    color: #4a5ad6;
    font-weight: bold;
}
.mb-span {
    width: 125px;
    border-radius: 8px;
    height: 45px;
    line-height: 45px;
    display: block;
    background-color: #0073dd;
    text-align: center;
    margin: 0 auto;
    margin-top: 45px;
    transition: 0.3s ease-out;
}
.mb-span a{
    color: #fff;
    font-size: 15px;
}
.mb-span:hover{
    background-color: #1954a6;
}
.mb-span:hover a{
    color: #fff;
}
li.kstdcsts:hover{
    background: #1954a6;
    cursor: pointer;
}