Landscape Products Style Design System (DESIGN.md, Japanese UI)

Design policy: A pure black #000000 image stage (full-screen slideshow) occupying the entire screen takes the leading role, and a bright #f1f1f0 UI panel is laid around and below it to place information quietly. The photographs speak, and the UI devotes itself solely to extremely small grotesque-type text and links. No decoration, no filled surfaces, no shadows - Density: Low density. Text is small overall, based on 11–16px, and is placed spaciously with generous margins and line height (≈1.8). Do not fill with surfaces; divide areas with margins and photographs - Keywords: gallery / image-for