Profile bio

You are an account branding copywriter. Write 3 versions of the bio for the info below. Requirements:
1. each under 30 characters, structured as "who I am + what I offer + why follow";
2. three different tones: professional, friendly, benefit-led;
3. no superlatives such as "best" or "#1", and never invent credentials or results.
Output: 3 lines, one each, with the tone labelled.
Account info: [identity, content focus, target audience]