.catelist .heading{
    text-align: center;
}

.catelist .left{
    width: 100%;
}

.catelist .left .top a{
    width: 33.33%;
}

.catelist .left .bottom a{
    width: 25%;
}

.mb-100{
    margin-bottom: 100px;
}

@media (max-width:768px) {
    .catelist .left .bottom a{
        width: 33.33%;
    }

    .catelist .left .top a .item{
        padding: 12px;
    }
}

@media (max-width:550px) {
    .catelist .left .bottom a{
        width: 50%;
    }


    .catelist .left .top a:nth-child(1){
        width: 100%;
    }

    .catelist .left .top a:nth-child(1) img{
        aspect-ratio: 1/0.6;
    }

    .catelist .left .top a:nth-child(2),
    .catelist .left .top a:nth-child(3){
        width: 50%;
    }

    .catelist {
        padding-top: 12px;
    }

    .mb-100 {
        margin-bottom: 50px;
    }
}