Links not right in Safari, but ok in Firefox and Chrome


On this page I can't figure out why the teacher's names/links don't show in Safari, but do in Firefox and Chrome.

It seems to be related to this CSS below, which is to keep links on the homepage white, whether they've been visited or not.

/* Links Not Change Colour on Material Cards on Home Page */
.page-id-158541 .post_content a:not(.button), .post_content a:visited:not(.button) {
color: #fff;

Support access granted if you require access. CSS is in Fortuna Options > Custom CSS.

Please advise.

Thanks in advance,