Sakura Color Products (SAKURA) Style Design System (DESIGN.md, Japanese UI)

Design policy: Take white and whitespace generously, and pull with photography and red. The hero is a 3-up slider, and below it, large photo cards are placed on a white ground. Dividers are made not with rules but with a full-width red band (#d90000) and pale surface colors. - About Sakura Color Products: The range spans art materials for toddlers and schools to premium writing instruments like SAKURA craft_lab. The site must reconcile "child-friendly pop" with "the neatness of an industrial product," switching between multiple colors and a single red depending on the context. - Density: Mediu