.mf {position: fixed;left: 0;bottom: 0;right: 0;z-index: 99;display: none;}

.mf a {display: block;flex: 1;height: 70px;text-align: center;line-height: 70px;font-size: 20px;color: #fff;background-color: #382b20;}

.mf a+a {background-color: #855b37;}

.cp_list li:nth-child(n+5) {display: none;}

@media (max-width: 990px) {
    .body {padding-bottom: 70px;}
    .mf {display: flex;}
    .cp_list li:nth-child(n+5) {display: block;}		
}