.down_header .navbar-nav>li>a{padding-left: 0; padding-right: 0;}
@media screen and (min-width: 1024px) and (max-width: 1199px ){
    .down_header .navbar-nav>li>a{display: -webkit-box;max-width: 180px; line-height: 60px;padding: 0; word-break: break-all;text-overflow: ellipsis;-webkit-box-orient: vertical;-webkit-line-clamp: 1;overflow: hidden;}

}
@media screen and (min-width: 768px) and (max-width: 1023px ) {
    .down_header .navbar-nav>li>a{display: -webkit-box;max-width: 140px; line-height: 60px;padding: 0; word-break: break-all;text-overflow: ellipsis;-webkit-box-orient: vertical;-webkit-line-clamp: 1;overflow: hidden;}
}