Hey there,

Thanks for reaching in out,

Please use this CSS here in Salient > General Settings > CSS/Script Related > Custom CSS Code

@media only screen and (max-width: 690px) {
#header-outer[data-permanent-transparent="false"] header#top #logo.no-image {
    font-size: 34px!important;
    line-height: 1.2em!important;
}
    }

Regards