.gonglv,.brand,.CASE {
    display: block;
    flex-wrap: wrap;
    justify-content: center;
    list-style: none;
    padding: 2px;
    width: 100%;
    float: left;
}
.gonglv li,.brand li {
    text-align: center;
    height: 35px;
    line-height: 35px;
    margin-right: 20px;
    margin-bottom: 10px;
    float: left;
    margin-right: 21px;
    margin-bottom: 21px;
    width: calc(100% / 4 - 21px);
    box-sizing: border-box;
    border: 1px solid #ddd;
}
@media only screen and (max-width: 768px) {
    .gonglv {
        width: 100%;
        margin: 0 auto;
    }
}
@media only screen and (max-width: 768px) {
    .gonglv li {
        transform: none;
        animation: none;
        width: 25% ;
    }
    .brand li{
        width: 44.4%;
    }
}
    .gonglv .active,.brand .active{
        background: #e4900c !important;
         color: #fff !important;
    }