p,div{word-wrap:break-word}
.dsm{
	background: #FFFEFC;
	margin:0 auto;
	width: 100%;
}
.bgzs{
	width: 100%;

}
.banner img{
	display: block;
	width: 100%;
	margin:0 auto;
}
.w1250{
	width: 1250px;
	margin:0 auto;
}
.modulartit {
    text-align: center;
    margin-bottom: 52px;
}
.modular_case {
    margin-bottom: 0;
}.modulartit h6 {
    font-size: 44px;
    color: #041b45;
    font-weight: normal;
    margin-bottom: 5px;
}.english {
    font-size: 22px;
    color: #898989;
    position: relative;
}.english:before {
    position: absolute;
    left: 0px;
    top: 15px;
    content: '';
    width: 502px;
    height: 2px;
    background: #9fa0a0;
}.english:after {
    position: absolute;
    right: 0px;
    top: 15px;
    content: '';
    width: 502px;
    height: 2px;
    background: #9fa0a0;
}.displayvideo {
    box-sizing: border-box;
    margin: 0 auto 70px;
    overflow: hidden;
}.disitem {
	width: 584px;
    margin-bottom: 46px;
    float: left;
    margin-right: 82px;
}
.disitem:nth-child(2n){
	margin-right: 0;
}
.videodiv {
    width: 100%;
    height: 338px;
    box-sizing: border-box;
    border: 1px solid #676bb0;
    cursor: pointer;
}.label {
    display: block;
    width: 100%;
}.videoinfo {
    padding: 10px 0 0;
    position: relative;
    box-sizing: border-box;
}.videodiv video {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: fill;
}.name_topic {
    color: #0563ae;
    font-size: 24px;
}.professor {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    text-align: center;
    margin-bottom: 10px;
}.videotopic {
    height: 60px;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    -webkit-line-clamp: 2;
    display: -webkit-box;
    -webkit-box-orient: vertical;
}.bgheight {
    height: 62px;
    background: linear-gradient(to bottom right,#18519a,#43b9eb);
}
.exbg{
	width: 100%;
	margin-bottom: -200px;
}