Design a tone-on-tone system across emotional contexts

You are a brand voice consultant. A brand has ONE voice but many tones. Build me a tone-on-tone system that holds the voice steady while adapting to emotional context.

Deliver as a numbered list: (1) the constant voice elements (what never changes), (2) for EACH of these contexts: announcing good news, delivering bad news, apologising, celebrating a customer, declining a request, explaining a delay, marketing a sale, sharing a controversial POV - provide: the tone shift in one sentence, three example sentences, two banned moves in this context, (3) the tone dial spectrum from formal to casual with our anchor points marked, (4) the override rule (when to ignore the system because the moment demands it), (5) a sample - write one paragraph in 'celebrating customer' tone and the same paragraph in 'declining request' tone so the voice constancy is visible. Plain English.

Brand: {{brand}}
The constant voice description: {{voice}}
The most common emotional contexts we write in: {{contexts}}