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

Design policy: A dark-theme foundation (#111111 background + white text) expressing a premium feel and technological advancement. Reflecting the fact that video, games, and music are the pillars of its business, it creates a cinematic worldview in which images and visuals stand out against a dark background. - Density: The hero section features bold full-screen imagery and video production. Corporate information is organized at a moderate density, and the news list is compact with 1.5 line height. - Keywords: Dark & cinematic, SST proprietary font, clean white text, advanced technology, entert