.top-img img {
    max-width: 1920px;
    width: 100%;
    height: 500px;
    margin: 0 auto;
}


.center-wrap {
    width: 1280px;
    margin: 0 auto;
}

.main-wrap {
    margin: 40px auto;
}

.left-box {
    float: left;
    width: 24%;
    text-align: center;
}

.left-nav-tit {
    width: 100%;
    height: 100px;
    background-color: #0068b7;
    line-height: 100px;
    font-size: 26px;
    color: #fff;
}

.left-nav-item {
    display: block;
    width: 100%;
    min-height: 80px;
    line-height: 80px;
    
    font-size: 20px;
    color: #000;
    border-top: 1px solid #0068b7;
}

.left-nav-item:first-child {
    border-top: none;
}
.left-nav-item > a{
    background-color: rgb(206 206 206 / 43%);
}
.left-nav-item  a{
    display:block;
    position:relative;

}

.left-nav-item> a::after {
    content: " >>";
    /* font-size: 15px; */
    font-weight: bold;
    position: absolute;
    margin-left: 5px;
    transform: translateX(-10px);
    transition: all .3s;
    opacity: 0;
    visibility: hidden;
}

.left-nav-item:hover>a,
.left-nav-item.on>a {
    background-color: rgb(220, 220, 220);
}

.left-nav-item:hover >a::after,
.left-nav-item.on > a::after {
    transform: translateX(0);
    visibility: visible;
    opacity: 1;
}

.right-msg {
    margin-left: 27%;
    overflow: hidden;
}

.right-location {
    width: 100%;
    background-color: rgba(255, 255, 255, 0.62);
    height: 51px;
    line-height: 57px;
    border-bottom: 1px solid #888;
    color: #000;
}

.location-img {
    float: left;
    width: 31px;
    height: 57px;
    background: url(../images/location.png) no-repeat center;
}

.right-location,
.right-location a {
    font-size: 20px;
    color: #000;
}

.right-location a:hover,
.right-location span:last-child a {
    color: #0068b7;
}

.list-wrap {
    width: 100%;
    margin: 20px auto 40px;
}

.list-item {
    border-bottom: solid 1px #dcdcdc;
    padding: 0 2px 10px;
    margin: 0 2px 20px;
    transition: all .3s;
    -moz-transition: all .3s;
    -webkit-transition: all .3s;
    -o-transition: all .3s;
}

.list-time {
    float: left;
    width: 80px;
    height: 80px;
    background: #bfbfbf;
    float: left;
    text-align: center;
    padding: 7px 10px 8px;
    transition: all .3s;
    -moz-transition: all .3s;
    -webkit-transition: all .3s;
    -o-transition: all .3s;
}

.day {
    color: #fff;
    font-size: 31px;
}

.year {
    color: #fff;
    font-size: 14px;
}

.list-content {
    margin-left: 120px;
}

.list-item-tit {
    font-size: 17px;
    font-weight: bold;
    color: #494949;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.list-item-content {
    font-size: 14px;
    color: #757575;
    margin-top: 12px;
    display: block;
    line-height: 20px;
    max-height: 40px;
    text-indent: 2em;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.list-item:hover .list-time {
    background-color: #0068b7;
}

.list-item:hover {
    transform: translateY(-10px);
    box-shadow: 3px 3px 7.2px 1.8px rgba(56, 0, 0, 0.3);
}


/* 文章 */

.article {
    width: 100%;
    padding: 0 18px;
    margin: 0 auto;
}

.article-title {
    text-align: center;
    margin: 15px auto;
    font-size: 21px;
    color: #000;
    font-weight: bold;
    line-height: 40px;
    cursor: pointer;
}

.article-msg {
    text-align: center;
    font-size: 12px;
    color: #888888;
    line-height: 30px;
    height: 30px;
    margin-bottom: 20px;
}

.article-msg span {
    padding: 0 5px;
}

.article-link {
    margin: 30px 0;
}

.article-link div {
    margin: 15px 0;
}

.article-link a {
    color: #676767;
}

.article-link a:hover {
    color: #0068b7;
}
.article img {
    display:inline;
    border: none !important;
}

/* teachers */

.teachers {
    display: flex;
    flex-wrap: wrap;
    margin-top: 40px;
}

.teacher-item {
    float: left;
    width: 33%;
    margin-bottom: 40px;
}

.teacher-item img {
    width: 160px;
    height: 210px;
    display: block;
    margin: 0 auto;
}

.teacher-item a {
    display: block;
    margin: 0 auto;
    width: 160px;
    line-height: 26px;
    text-align: center;
}

.teacher-item a:hover {
    color: #0068b7;
}

/* 三级栏目 */
.nav-item-list{
    
width: 100%;
}
.nav-item-list .nav-som {
    background-color: #f1f1f1;
    width: 98%;
    margin: 0 auto;
    line-height: 60px;
    transition: all .3s;
}
.nav-item-list .nav-som a {
    transition: all .3s;
    color: #464646;
}
.nav-item-list .nav-som:hover,
.nav-item-list .nav-som.on{
    background-color: rgb(220, 220, 220);

}