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

Design policy: Professional and trustworthy business SaaS design. Based on deep navy blue, balancing solidity with innovation - Density: An LP-style spacious section structure, but characterized by body line-height: 1.0 and extremely tight line spacing - Keywords: Trust, solidity, navy blue, business, clean - Characteristics: A Latin-script-first font stack that places helvetica first (lowercase) and combines it with Yu Gothic. A powerful large heading size of 54.8px. 51 CSS custom properties