.page-bg{
    background: url("../images/background/2-5-bj.png") no-repeat scroll center center / cover;
    padding: 20px;
}

#intelligent_teaching-box .card-item{
    /* border: 1px solid; */
    margin: 12px;
    text-align: center;
    padding: 12px;
    background-color: var(--light);
}

#intelligent_teaching-box .card-item .title{
    font-weight: bold;
    font-size: 14px;
    margin-bottom: 8px;
}
#intelligent_teaching-box .card-item .child-items{
    line-height: 22px;
    color: var(--gray);
    font-size: 13px;
}
#intelligent_teaching-box .card-item .child-items .child-item{
    display: block;
}

#intelligent_teaching-box .card-item .teacher-card-bg{
    height: 50px;
    width: 50px;
    text-align: center;
    background: url("../images/product/intelligent_1.png") no-repeat scroll center center content-box;
    display: inline-block;
    background-size: 100%;
    margin-bottom: 12px;
}
#intelligent_teaching-box .card-item .teacher-card-bg1{
    background-image: url("../images/product/intelligent_1.png");
}
#intelligent_teaching-box .card-item .teacher-card-bg2{
    background-image: url("../images/product/intelligent_2.png");
}
#intelligent_teaching-box .card-item .teacher-card-bg3{
    background-image: url("../images/product/intelligent_3.png");
}
#intelligent_teaching-box .card-item .teacher-card-bg4{
    background-image: url("../images/product/intelligent_4.png");
}
#intelligent_teaching-box .card-item .teacher-card-bg5{
    background-image: url("../images/product/intelligent_5.png");
}