aeru Style Design System (DESIGN.md, Japanese UI)

Design policy: A warm yet dignified design that connects tradition and modernity. Vermillion is established as the brand color, and the texture of Japanese handcraft is expressed through warm, washi-like off-white surfaces - Density: Relaxed. A gallery-like composition that generously uses whitespace and carefully showcases each individual craft object - Keywords: vermillion, traditional crafts, warmth, Japanese modern, bilingual, pill CTA, palt - Characteristics: A bilingual header pattern — English section label (Roboto, vermillion) + Japanese heading — is used in every section. All CTAs are