상황
A CTO presenting the technology landscape of a new e-commerce platform to non-technical stakeholders needs a clean one-page system map.
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01
Four top-level branches match the four-layer mental model used by most engineers.
02Core Services listed at leaf level
detailed service-to-service interactions live in a separate architecture diagram.
03
Infrastructure is a flat list because all elements are at the same deployment level.
Convert to a block diagram when stakeholders need data flows; use as table-of-contents for a full Technical Design Document.