.content-pcExample .center{
    width: 1200px;
    margin: 0 auto;
}

.content-pcExample .banner-content-box{
    background-image: url("../../images/onlineParentSchool/guide_bg.png");
}

.content-pcExample .channel-content{
    padding: 23px 180px;
    display: flex;
    justify-content: space-around;
}

.content-pcExample .channel-content .channel-item{
    width: 150px;
    height: 54px;
    line-height: 54px;
    border-radius: 40px;
    -moz-border-radius: 40px;
    background-repeat: no-repeat;
    background-size: 100% 100%;
}

.content-pcExample .channel-content .channel-item:first-of-type{
    background-image: url("../../images/onlineParentSchool/guide1_btn_unsel.png");
}

.content-pcExample .channel-content .channel-item:nth-of-type(2){
    background-image: url("../../images/onlineParentSchool/guide2_btn_unsel.png");
}

.content-pcExample .channel-content .channel-item:nth-of-type(3){
    background-image: url("../../images/onlineParentSchool/guide3_btn_unsel.png");
}

.content-pcExample .channel-content .active:first-of-type{
    background-image: url("../../images/onlineParentSchool/guide1_btn_sel.png");
}

.content-pcExample .channel-content .active:nth-of-type(2){
    background-image: url("../../images/onlineParentSchool/guide2_btn_sel.png");
}

.content-pcExample .channel-content .active:nth-of-type(3){
    background-image: url("../../images/onlineParentSchool/guide3_btn_sel.png");
}

.content-pcExample .main-content-box{
    width: 100%;
    background: #F8FBFC;
    padding-bottom: 20px;
}

.content-pcExample .main-example{
    padding-top: 40px;
}

.content-pcExample .channel-content{
    padding: 23px 300px;
}

.content-pcExample .channel-content .channel-item{
    width: 196px;
    height: 60px;
    line-height: 60px;
}

.content-pcExample .channel-content .channel-item:first-of-type{
    background-image: url("../../images/onlineParentSchool/bangy_unsel.png");
}

.content-pcExample .channel-content .channel-item:nth-of-type(2){
    background-image: url("../../images/onlineParentSchool/bangy2_unsel.png");
}

.content-pcExample .channel-content .active:first-of-type{
    background-image: url("../../images/onlineParentSchool/bangy_sel.png");
}

.content-pcExample .channel-content .active:nth-of-type(2){
    background-image: url("../../images/onlineParentSchool/bangy2_sel.png");
}