Hello redstep,
Would using the id or class of the element that contains your link be specific enough? If all the links will be contained in <article> you may target only those links by writing your CSS like this -
Code:
article a:focus, article a:hover {color:#fff;text-decoration:none;}
article a {color:#121212;text-decoration:none;background-color:#ffc21f;
See about specificity here.