Placeholder band 1. Scroll past ~300px to watch only the 86px main bar detach and fix full-width with a soft shadow. The white logo column and navy topbar scroll away.
Placeholder band 2. Hover a menu item with a chevron for the black dropdown with its lemon lid. Click the topbar magnifier for the search panel. On mobile, tap the navy burger for the drawer over the lemon glow.
Placeholder band 3. This is component scaffolding only - not real page content.