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

Design approach: A classical composition centered on Lotte Red #dd1d18, alternating between warm neutral #efece7 section surfaces and white backgrounds. Headings follow a unified bilingual two-tier pattern: English (large, Black weight) + Japanese (small, wide tracking) - Density: The default line-height of 1.15 is quite tight. Weight 700 is the base body weight, giving an overall bold-heavy impression. Unusually compact typesetting for a Japanese site - Keywords: Lotte Red, bilingual headings, bold-heavy, compact line-height, warm neutral surfaces - Characteristics: - A legacy site with no CS