.activity_box{
    width: 1100px;
    padding: 0 50px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}


.activity_item{
    display: flex;
    justify-content: space-between;
    padding: 40px 0;
    border-bottom: 1px dashed #E6E6E6;
}

.activity_item img{
    width: 200px;
    height: 112px;
}

.item_1{
    font-size: 16px;
    color: #131313;
    font-weight: 500;
    transition: all .2s linear;
}

.item_2{
    font-size: 14px;
    color: #9B9A9A;
    text-align: justify;
    margin-top: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    line-height: 26px;
    height: 52px;
}

.item_3{
    font-size: 12px;
    color: #9B9A9A;
    margin-top: 14px;
}

.teachers_pages {
    width: 920px;
    margin-right: 50px;
    margin-bottom: 50px;
}

.activity_detail_box{
    width: 1100px;
    padding: 0  50px 80px 50px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.detail_title{
    font-size: 24px;
    font-weight: bold;
    color: #333333;
    text-align: center;
}

.detail_time{
    font-size: 14px;
    color: #9B9A9A;
    text-align: center;
    margin-top: 20px;
}

.detail_item_title{
    width: 1100px;
    padding: 40px 0 20px 0;
    border-bottom: 1px dashed #E5E5E5;
    margin-bottom: 30px;
}

.detail_img{
    width: 720px;
    height: 480px;
    margin: 40px 0;
}

.detail_text{
    font-size: 14px;
    line-height: 30px;
    color: #9B9A9A;
    text-align: justify;
    white-space: pre-line;
}

.teachers_pages{
    margin-top: 39px;
}

.activecur .item_1{
    color: #7D0811;
}