/*服务客户样式*/
    .main .trademark_box{
        width: calc(100% - 19px);
        height: auto;

        margin: auto;

        border-right: 1px #f1f1f1 dashed;

        margin-bottom: 10px;
    }

        .main .trademark_box .img{
            width: calc(100% / 4);
            height: calc((100% / 4) * 0.383);

            border-left: 1px #f1f1f1 dashed;
            border-bottom: 1px #f1f1f1 dashed;

            float: left;
        }