.mark-block li {
    width: 25%;
    float: none;
    display: inline-block;
}
.mark-block li {
    float: left;
    box-sizing: border-box;
    width: 33%;
    margin-bottom: 10px;
    padding-right: 10px;
}
.logo_mark {
    background-image: url(/image/all_mark_logo.jpg);
    background-repeat: no-repeat;
    display: block;
    height: 30px;
    float: left;
}