.main-menu>ul>li>a {
       font-size: 18px;
   }
    .main-menu>ul>li+li {
            margin-left: 18px !important;
        }

@media screen and (max-width:1440px){
    .main-menu>ul>li+li {
            margin-left: 8px !important;
        }
        .main-menu>ul>li>a {
            font-size: 15px;
        }
}

@media screen and (max-width:1120px){
    .main-menu>ul>li+li {
            margin-left: 5px !important;
        }
        .main-menu>ul>li>a {
            font-size: 12px;
        }
}