@charset "utf-8";
* {
    padding: 0;
    /*margin: 0;*/
}
div,p,span,ul,li,a,i,em{
padding: 0;
margin: 0;
}

li {
    list-style: none;
}

a {
    text-decoration: none;
    color: #333;
}

h2,
h3,
i,
em {
    font-style: normal;
}

html,
body {
    font-family:"SourceSansPro-Regular", "微软雅黑";
padding: 0;
    margin: 0;
}

input,
img,
a {
    outline: none;
    border: 0;
}

.clear {
    clear: both;
}

.px1300 {
    max-width: 1300px;
    margin: 0 auto;
}

.header {
position:relative;
    background: url("https://www.cavenetomi.com/__xh__/bright.vsph.tsinghua.edu.cn/images/head-bg.png") no-repeat right bottom;
    background-size: 100%;
}

.head-l {
    float: left;
    background: #fff;
    line-height: 120px;
}

.head-l a {
    display: block;
}

.head-l a img {
    /* display: block; */
    vertical-align: middle;
}

.head-r {
    position: relative;
    float: right;
    text-align: right;
    padding-top: 20px;
    font-size: 0;
}

.head-r:after {
    content: '';
    position: absolute;
    left: 0;
    /* right: -310px; */
    top: 0;
    bottom: 0;
    /* background: url("https://www.cavenetomi.com/__xh__/bright.vsph.tsinghua.edu.cn/images/head-bg.png") no-repeat right top; */
    /* background-size: 1040px auto; */
    z-index: -1;
}

.head-r>a {
    line-height: 20px;
    font-size: 16px;
    color: #fff;
    margin-left: 30px;
    height: 21px;
    overflow: hidden;
    /* float: right; */
}

.head-r>a:hover {
    color: #d9a5a5;
}

.head-r a img {
    vertical-align: middle;
    padding-right: 10px;
}

.nav {
    margin-top: 25px;
    margin-right: -35px;
}

.nav>ul>li {
    position: relative;
    float: left;
    padding-bottom: 30px;
}

.nav>ul>li:first-child>a {
    border-left: none;
}

.nav>ul>li>a {
    padding-left: 18px;
    padding-right: 18px;
    font-size: 20px;
    font-weight: bold;
    color: #fff;
    border-left: 1px solid rgba(255, 255, 255, .5);
}

.nav>ul>li.on>a {
    color: #edc3c3;
}

.nav>ul>li>ul {
    position: absolute;
    top: 48px;
    width: 200px;
    left: 50%;
    margin-left: -100px;
    background-color: #36147c;
    box-shadow: 0 0 5px #464d68;
    z-index: 999;
    display: none;
    padding-top: 10px;
    padding-bottom: 10px;
}

.nav>ul>li>ul>li {
    text-align: center;
    line-height: 35px;
}

.nav>ul>li>ul>li>a {
    color: #fff;
    font-size: 16px;
}

.nav>ul>li>ul>li:hover {
    background-color: #5250a4;
}
#banner{position: relative;
    background-color: #fff;}
.banner a {
    display: block;
}

.banner a img {
    display: block;
    width: 100%;
}

.footer {
position:relative;
    background-color: #3a158c;
    padding: 30px 0;
}

.foot-l {
    float: left;
}

.foot-l>a {
    display: block;
}

.foot-l a img {
    display: block;
    margin-top: 7px;
}

.foot-m {
    float: left;
    width: 45%;
    text-align: center;
}

.foot-m>p {
    font-size: 16px;
    color: rgba(255, 255, 255, .6);
    margin-top: 15px;
}

.foot-m>p:first-child {
    margin-top: 0;
}

.foot-r {
    float: right;
}

.foot-r>ul>li {
    position: relative;
    float: left;
    margin-left: 15px;
}

.foot-r>ul>li .ewm {
    position: absolute;
    left: 50%;
    transform: translate(-50%);
    top: -100px;
    display: none;
}

.foot-r>ul>li:hover .ewm {
    display: block;
}


/* 移动端开始 */

.top {
    max-width: 1920px;
    margin: 0 auto;
    position: fixed;
    right: 10px;
    top: 18px;
    width: 25px;
    height: 25px;
    z-index: 9999;
}

.wap {
    display: none;
}

.top>img {
    display: block;
    width: 100%;
}

.wap-menu {
    position: absolute;
    top: 0;
    right: 0;
    z-index: 99999;
    font-size: 0;
}

.close-menu {
    display: none;
    position: absolute;
    right: 0;
    top: 0;
}

.wap-menu img {
    height: 25px;
}

.m-head {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 10px;
    z-index: 999;
}


/* 移动端结束 */

@media screen and (max-width:1370px) {
    .nav {
        margin-right: 0;
    }
    .header {
        
    }
    .nav>ul>li>a {
        font-size: 14px;
        padding-left: 10px;
        padding-right: 10px;
    }
    .footer {
        padding-left: 25px;
        padding-right: 25px;
    }
    .foot-m {
        width: 33%;
    }
}

@media screen and (max-width:1024px) {
    body {
        padding-top: 60px;
    }
    .header {
        display: none;
    }
    .wap {
        display: block;
    }
    .m-logo {
        font-size: 0;
    }
    .m-head {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        background: #fff;
        padding: 10px;
        z-index: 999;
        box-shadow: 0 5px 5px rgb(0 0 0 / 20%);
        background: #fff;
    }
    .m-logo {
        font-size: 0;
    }
    .m-logo a {
        font-size: 0;
        line-height: 40px;
    }
    .m-logo img {
        max-height: 40px;
        max-width: 80%;
        vertical-align: middle;
    }
    .m-tlink {
        padding: 10px 15px 0 15px;
    }
    .m-tlink a {
        font-size: 14px;
        margin-right: 15px;
        margin: 5px 0;
        color: #fff;
        display: inline-block;
        font-size: 14px;
        line-height: 24px;
        background: #fff;
        color: #004980;
        line-height: 30px;
        padding: 0 15px;
        border-radius: 5px;
    }
    .m-search {
        margin: 0 15px;
        padding-right: 50px;
        padding-left: 10px;
        padding-top: 5px;
        padding-bottom: 5px;
        position: relative;
        line-height: 35px;
        margin-top: 15px;
        border: 1px solid #fff;
    }
    .m-search input[type="text"] {
        display: block;
        width: 100%;
        line-height: 25px;
        background: none;
        color: #fff;
    }
    .m-search input[type="text"]::placeholder {
        color: #fff;
    }
    .m-search input[type="image"] {
        position: absolute;
        right: 10px;
        top: 10px;
        height: 15px;
    }
    .m-nav {
        position: fixed;
        top: 60px;
        left: 100%;
        right: 0;
        bottom: 0;
        z-index: 999;
        background: #1c379a;
        overflow-y: scroll;
    }
    .m-nav ul {
        padding: 0 15px;
    }
    .m-nav ul li {
        border-bottom: 1px solid rgba(255, 255, 255, 0.2);
        position: relative;
    }
    .m-nav ul li>span.on {
        transform: rotateZ(90deg);
    }
    .m-nav ul li ul {
        display: none;
    }
    .m-nav ul li ul li {
        border: none;
    }
    .m-nav>ul>li a {
        display: block;
        font-size: 14px;
        line-height: 20px;
        padding: 15px 0;
        position: relative;
        color: #fff;
    }
    .m-nav>ul>li ul li a {
        padding: 10px 0;
    }
    .m-nav>ul>li>span {
        position: absolute;
        width: 20px;
        height: 20px;
        background: url("https://www.cavenetomi.com/__xh__/bright.vsph.tsinghua.edu.cn/images/m-nav_down.png") no-repeat;
        background-size: 14px 14px;
        background-position: center center;
        right: 0;
        top: 15px;
        cursor: pointer;
        display: block;
        color: #fff;
        transition: all 0.3s;
    }
}

@media screen and (max-width:1020px) {
    .foot-l,
    .foot-m,
    .foot-r {
        float: none;
        width: auto;
        margin-bottom: 15px;
    }
    .foot-r>ul {
        text-align: center;
    }
    .foot-r>ul>li {
        display: inline-block;
        float: none;
    }
    .foot-l a img {
        margin-left: auto;
        margin-right: auto;
    }
}

@media screen and (max-width:450px) {
    .foot-l a img {
        width: 80%;
    }
}