/* css 字号变量 */
:root {
    --pub-menu-lv1: 18px;
    /* 头部一级导航菜单 */
    --pub-menu-lv2: 15px;
    /* 头部二级导航菜单 */
    --home-main-big: 22px;
    /* 首页内容区大标题 */
    --home-main-mid: 18px;
    /* 首页内容区中小标题 */
    --home-main-little: 15px;
    /* 首页内容区内容 */
    --home-xsyt-big: 18px;
    /* 首页学术研讨一级 */
    --home-xsyt: 16px;
    /* 首页学术研讨二级 */
    --home-media-cover: 22px;
    /* 首页视频号、公众号、商学影像封面内部标题 */
    --home-link-title: 15px;
    /* 首页链接标题 */
    --more-link: 20px;
    /* 更多链接 */
    --date: 13px;
    /* 日期 */
    --footer-menu-big: 20px;
    /* 底部一级菜单 */
    --footer-menu-mid: 16px;
    /* 底部二级菜单 */
    --clumn-big: 22px;
    /* 栏目页大标题 */
    --clumn-title: 16px;
    /* 栏目页内容区标题链接 */
    --clumn-desc: 14px;
    /* 栏目页其它信息、简介 */
    --clumn-left-big: 26px;
    /* 栏目页左侧大栏目名 */
    --clumn-left-menu: 18px;
    /* 栏目页左侧一级栏目名 */
    --clumn-left-menu-lv2: 16px;
    /* 栏目页左侧二级栏目名 */
    --clumn-left-menu-lv3: 14px;
    /* 栏目页左侧二级栏目名 */
    --content-big: 30px;
    /* 内容页大标题  */
    --content-other: 14px;
    /* 内容页其它信息、日期等 */
    --content-txt: 16px;
    /* 内容页内容主体 */
    --org-list: 24px;
    /* 组织机构列表 */
    --online: 18px;
    /* 线上课程列表 */
    --md: 16px;
    /* 秒懂商学列表 */
    --teacher-name: 18px;
    /* 教师列表教师名 */
    --teacher-other: 16px;
    /* 教师列表其它信息 */
    --teacher-more: 12px;
    /* 教师列表更多 */
}


html {
    font-size: 100px;
    scroll-behavior: smooth;
}

body,
ul,
li,
section,
div,
p,
form,
input,
span,
dl,
dt,
dd,
em,
h1,
h2,
h3,
h4,
h5,
h6 {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "微软雅黑";
    font-size: 0.16rem;
}

img {
    border: none;
    outline: none;
}

a {
    text-decoration: none;
    outline: none;
}

li {
    list-style: none;
}

.ellips {
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.fl {
    float: left;
}

.fr {
    float: right;
}

.clearfix::after {
    content: "";
    display: block;
    clear: both;
}

.flex {
    display: flex;
}

.flex-column {
    flex-direction: column;
}

.flex-main-between {
    justify-content: space-between;
}

.flex-vice-center {
    align-items: center;
}

.flex-wrap {
    flex-wrap: wrap;
}

.container {
    width: 14.07rem;
}

.margin-center {
    margin-left: auto;
    margin-right: auto;
}

.pr {
    position: relative;
}

.pa {
    position: absolute;
}

.px {
    position: fixed;
}

.show-m {
    display: none;
}

.d {
    display: block;
}

.w100 {
    width: 100%;
}

.h100 {
    height: 100%;
}

body {
    padding: 1.47rem 0 0;
}

/* 公共头部 */
.header {
    padding: 0.05rem 0 0;
    left: 0;
    top: 0;
    height: 1.47rem;
    background-color: #c13432;
    z-index: 100;
    box-shadow: 0 0 0.15rem #534e4a;
}

.header .logo img {
    width: 3.75rem;
    height: auto;
}

.menu-box {
    position: relative;
    margin: 0.10rem 0 0;
}

.header .menu .menu-lv1 {
    position: relative;
    padding: 0 0.32rem;
    color: #fff;
    font-size: var(--pub-menu-lv1);
}

.header .menu .menu-lv1>a {
    color: #fff;
}

.header .menu .menu-lv2 {
    position: absolute;
    left: 50%;
    top: 0.4rem;
    width: 1.65rem;
    max-height: 0;
    text-align: center;
    font-size: var(--pub-menu-lv2);
    line-height: 0.35rem;
    background-color: #fff;
    transform: translateX(-50%);
    overflow: hidden;
}

.header .menu .menu-lv2::before {
    content: "";
    position: absolute;
    left: 50%;
    top: -0.24rem;
    width: 0;
    height: 0;
    border: 0.12rem solid transparent;
    border-bottom: 0.12rem solid #fff;
    transform: translateX(-50%);
    z-index: 2;
}

.header .menu .menu-lv2::after {
    content: "";
    z-index: 1;
    position: absolute;
    left: 0;
    top: -0.24rem;
    width: 100%;
    height: 0.24rem;
}

.header .menu .menu-lv2>a {
    display: block;
    color: #fff;
    opacity: 0;
}

.header .menu .menu-lv1:hover .menu-lv2 {
    padding: 0.16rem 0;
    max-height: 4.5rem;
    border-bottom: 0.04rem solid #d34749;
    z-index: 1000;
    overflow: inherit;
    transition: 0.2s linear;
}

.header .menu .menu-lv1:hover .menu-lv2>a {
    color: #000;
    opacity: 1;
    transition: 0.4s linear;
}

.header .menu-box .right {
    position: absolute;
    right: 0;
    top: -0.75rem;
}

.header .menu-box .en {
    margin: -0.03rem 0 0 0.32rem;
    color: #fff;
    font-size: var(--pub-menu-lv1);
}

.header .search-key {
    margin: 0 0.15rem 0 0;
    width: 0;
    height: 0.25rem;
    border: none;
    border-radius: 0.05rem;
    transition: 0.2s linear;
    outline: none;
    text-indent: 1em;
}

.header .search-btn {
    width: 0.22rem;
    height: 0.21rem;
    background: url(../images/2022_ibs_104.png) 0 0/100% no-repeat;
    cursor: pointer;
}

/*.header .search:hover .search-key {*/
/*    width: 2rem;*/
/*}*/

/* 公共底部  */
.footer {
    margin: 0.64rem 0 0;
    background-color: #9d1d22;
}

.logo-box {
    align-items: center;
    padding: 0.4rem 0 0.24rem;
    border-bottom: 0.01rem solid #fe898b;
}

.logo-box .logo {
    width: 3.6rem;
}

.contact-us {
    padding: 0 0 0 0.45rem;
    background: url(../images/2022_ibs_10.png) 0 0.1rem no-repeat; 
}

.contact-email {
    padding: 0 0 0 0.6rem;
    background: url(https://www.hnu.edu.cn/images/fuwu-img10-2.png) 0 0.1rem no-repeat;
}

.contact-us h6,
.wechat h6,
.contact-email h6 {
    color: #fff;
    font-size: var(--footer-menu-mid);
    font-weight: normal;
}

.contact-us span,
.wechat span,
.contact-email span {
    font-size: 0.16rem;
    color: #fff;
}

.wechat {
    padding: 0 0 0 0.6rem;
    background: url(../images/2022_ibs_11.png) 0 0.1rem no-repeat;
    cursor: pointer;
}

.wechat-qr {
    top: -0.3rem;
    right: -1.5rem;
    z-index: 100;
    width: 1.45rem;
    height: 1.45rem;
    display: none;
}

.wechat-qr img {
    display: block;
    width: 100%;
    height: 100%;
}

.wechat-qr::after {
    content: "";
    position: absolute;
    left: -0.32rem;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border: 0.16rem solid transparent;
    border-right: 0.16rem solid #fff;
}

.wechat:hover .wechat-qr {
    display: block;
}

.aacsb {
    width: auto;
    height: 0.5rem;
}

.amba {
    width: auto;
    height: 0.5rem;
}

/* 网站地图 */
.website {
    padding: 0.36rem 0;
    color: #fff;
    font-size: 0.24rem;
}

.website dt {
    margin-bottom: 0.2rem;
    font-size: var(--footer-menu-big);
}

.website dd {
    padding: 0.08rem 0;
    font-size: var(--footer-menu-mid);
}

.website dd a {
    color: #e09798;
}

.footer .bar {
    height: 0.78rem;
    line-height: 0.78rem;
    color: #fff;
    font-size: 0.17rem;
    background: #5d0a0c;
}

.footer .bar span {
    margin-left: 0.8rem;
}

.btn-to-top {
    display: none;
    right: 10%;
    bottom: 0.6rem;
    width: 0.4rem;
    height: 0.42rem;
    background: url(../images/2022_ibs_14.png) center center no-repeat #fff;
    cursor: pointer;
}