Research entries are a vulcan_research CPT with a non-hierarchical research_category taxonomy. Archive shortcode runs WP_Query against the current category filter (from ?research_cat=…) and renders cards with title, term pills and excerpt.
Filter tabs are pill-shaped with the bronze tokens. Active tab swaps to the metallic gradient with dark text – same button treatment used everywhere on the site.
Recent six entries also surface on the home page in a strip under the module grid, pulling the first taxonomy term as a category label. Linking is direct to the single permalink. Nothing exotic – just clean WP plumbing.