nav .navList>ul>li {
    margin-right: 49.5px;
   
}

@media screen and (max-width: 1200px) {
    nav .navList>ul>li {
        margin-right: 29.5px;
    }
}



@media screen and (max-width: 999px) {
    .jianjie .btns a, .jianjie .btns a:nth-child(2) {
        width: 153px;
    }
}