principle / No direct component-to-global referenceNo direct component-to-global reference组件只能通过 L3/L4 契约消费 Token，不直接绑定 L1 Global Token。Related contentRelationships come from the local knowledge graph and include reverse links.Abstract Design Token System Case Study四层 Design Token 系统案例（Abstract Design Token System Case Study）一个独立的抽象 Design System case study，用 L1 Global、L2 Semantic、L3 Component Contract、L4 State / Variant 解释 Token 的职责边界、继承方向和组件使用方式。Reverse · Related