.main-wrapper {
    background-color: #f0f0f0;
}

.main-wrapper .bg {
    display: block;
    line-height: 0;
    width: calc(100vw - 100px);
}

.main-item {
    padding-bottom: 60px;
}

.main-title.mt-title {
    margin-top: -120px;
    padding-bottom: 100px;
}

.main-title {
    font-size: 3.4em;
    color: #490c63;
}

.main-content li {
    position: relative;
    float: left;
    width: 30%;
    margin-right: 5%;
    margin-bottom: 50px;
}

.main-content li:nth-child(3n) {
    margin-right: 0;
}


.main-content li img:not(.play) {
    width: 100%;
    height: 280px;
}

.main-content li .news-time {
    font-size: 14px;
    font-weight: 600;
    color: #ff0099;
}

.main-content li .news-school {
    margin-left: 1em;
    font-size: 14px;
    color: #666666;
}

.main-content li .news-title {
    margin-top: 10px;
    text-align: center;
    font-size: 16px;
    color: #000;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.play {
    position: absolute;
    width: 50px;
    top: 50%;
    left: 50%;
    margin-top: -50px;
    margin-left: -25px;
    cursor: pointer;
}

.page{text-align: center;margin: 60px auto;}
.page span{color: #333;padding: 10px 15px;cursor: pointer;margin: 0 10px; background-color: #fff;border-radius: 5px;}
.page .itembox{display: inline-block;}
.page span.active{color: #fff;background-color: #ff6600;}
.page span:hover{color: #fff;background-color: #ff6600;}
.page a {
    color: #333;
    padding: 10px 15px;
    cursor: pointer;
    margin: 0 10px;
    background-color: #fff;
    border-radius: 5px;
    display: inline-block;
}
.page a:hover{color: #fff;background-color: #ff6600;}
.page p{
    font-size: 14px;
}

@media only screen and (max-width: 1680px) {
    .main-wrapper .bg {
        width: calc(100vw - 4.55729vw);
    }
}

@media only screen and (max-width: 1440px) {
    .main-wrapper .bg {
        width: calc(100vw - 5.20833vw);
    }

    .main-title {
        font-size: 2.8em;
    }

    .main-content li img:not(.play) {
        height: 240px;
    }
}

@media only screen and (max-width: 1024px) {
    .main-wrapper .bg {
        width: calc(100vw - 7.11111vw);
    }

    .main-item {
        margin-top: -1em;
        padding-bottom: 1em;
    }

    .main-title.mt-title {
        margin-top: -1em;
        padding-bottom: 1em;
    }

    .main-content li {
        width: 45%;
        margin-right: 10% !important;
        margin-bottom: 1em;
    }

    .main-content li:nth-child(2n) {
        margin-right: 0 !important;
    }

    .main-content li .news-title,
    .main-content li .news-school {
        display: block;
        margin-left: 0;
    }

    .play {
        margin-top: -4em;
    }

    .main-content li img:not(.play) {
        height: 200px;
    }
}

@media only screen and (max-width: 768px) {
    .main-wrapper .bg {
        width: calc(100vw - 5.33333vw);
    }

    .main-content li img:not(.play) {
        height: 6em;
    }
}