* {
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none;
}

ul {
    list-style: none;
}


/* header头部样式 */

header {
    height: 185px;
    width: 100%;
    background-color: #25499d;
}

header .header-content {
    width: 70%;
    width: 1350px;
    margin: 0 auto;
    height: 100%;
    /* min-width: 1200px; */
    background-color: #25499d;
}

header .header-content::after {
    display: block;
    content: '';
    clear: both;
}

header .header-content .logo {
    position: relative;
    float: left;
    height: 100%;
}

header .header-content .header-time {
    position: relative;
    float: right;
    height: 100%;
}

header .logo img {
    position: absolute;
    top: 50%;
    margin-top: -37px;
}

header .header-line {
    margin-left: 54px;
    margin-right: 26px;
}

header .header-line span {
    position: absolute;
    top: 50%;
    margin-top: -30px;
    display: block;
    width: 6px;
    height: 60px;
    background-color: #7c92c4;
}

header .header-text {
    width: 426px;
    display: flex;
    flex-direction: column;
    margin-right: 392px;
}

header .header-text .text {
    position: absolute;
    top: 50%;
    margin-top: -34px;
}

header .header-text .text .text-top span {
    font-family: 'MicrosoftYaHei';
    font-weight: bold;
    font-size: 30px;
    color: #fff;
}

header .header-text .text .text-top span:first-child {
    margin-right: 20px;
}

header .header-text .text .text-top {
    margin-bottom: 8px;
}

header .header-text .text p {
    font-family: 'HElveticaNeueCE';
    font-weight: normal;
    font-size: 14px;
    color: #fff;
}

header .header-time .time {
    position: absolute;
    top: 50%;
    right: 0px;
}

header .header-time .time p:first-child {
    font-family: '微软雅黑';
    font-size: 18px;
    color: #fefefe;
    margin-bottom: 14px;
}

header .header-time .time p:last-child {
    font-family: 'ArialMT';
    font-size: 22px;
    color: #fefefe;
    font-family: '微软雅黑';
}


/* nav导航栏样式 */

nav {
    width: 100%;
    /* min-width: 1350px; */
    
    height: 50px;
}

nav .nav {
    /* width: 100%; */
    width: 1350px;
    margin: 0 auto;
    height: 100%;
}

nav .nav ul {
    display:flex;
    justify-content: space-between;
    list-style: none;
    height: 100%;
    font-size: 0;
}

nav .nav ul li {
    display: inline-block;
    width: 145px;
    height: 50px;
}

nav .nav li a {
    display: inline-block;
    width: 100%;
    height: 100%;
    font-family: '微软雅黑';
    font-size: 17px;
    color: #5d676e;
    line-height: 50px;
    text-align: center;
    ;
}

nav .nav ul a li {
    cursor: pointer;
    display: inline-block;
    height: 100%;
    width: 145px;
    line-height: 50px;
    text-align: center;
    font-family: '微软雅黑';
    font-size: 15px;
    color: #5d676e;
}

nav .nav ul a li span {
    width: 100%;
    height: 100%;
    display: block;
}

nav .nav ul .active a {
    font-weight: bold;
    color: #fff;
    background-color: #25499d;
}

nav ul .teacherIdeo {
    position: relative;
}

nav ul .teacherIdeo div {
    display: none;
    z-index: 99;
}

nav ul .teacherIdeo:hover div {
    display: block;
}

nav ul .teacherIdeo:hover a {
    font-weight: bold;
    color: #fff;
    background-color: #25499d;
}

nav ul .teacherIdeo a:hover {
    background-color: rgba(16, 9, 100, .9);
}

nav ul .teacherIdeo div a {
    font-size: 16px;
    font-weight: normal !important;
    font-stretch: normal;
    letter-spacing: 1px;
    color: #ffffff;
}

nav ul .teacherIdeo div {
    width: 145px;
    background-color: #25499d;
    font-family: 'MicrosoftYaHei';
    font-size: 14px;

    font-stretch: normal;
    letter-spacing: 1px;
    color: #ffffff;
}

.teacher-ideo {
    background-color: #100964 !important;
    opacity: 0.9;
}

.teacher-ideo a {
    color: #fff !important;
    ;
}

nav ul .teacherIdeo div div:first-child {
    position: absolute;
    left: 0px;
    top: 50px;
}

nav ul .teacherIdeo div div:nth-child(2) {
    position: absolute;
    left: 0px;
    top: 100px;
}

nav ul .teacherIdeo div div:nth-child(3) {
    position: absolute;
    left: 0px;
    top: 150px;
}

nav ul .teacherIdeo div div:nth-child(4) {
    position: absolute;
    left: 0px;
    top: 200px;
}
nav ul .teacherIdeo div div:nth-child(5) {
    position: absolute;
    left: 0px;
    top: 250px;
}
nav ul .teacherIdeo div div:nth-child(6) {
    position: absolute;
    left: 0px;
    top: 300px;
}
nav ul .policy div {
    position: absolute;
    left: 0;
    top: 50px;
}

nav ul .teaCon div {
    position: absolute;
    left: 0;
    top: 50px;
}