Write an understandable intro for a niche-industry service

My product or service is in a fairly niche field that outsiders don't easily understand. Write an intro that a non-professional reader can understand and that makes them want to learn more.

[What I do] (describe in your industry's own terms, no need to translate)
[Whose problem it solves]
[What customers did before] (without us)
[The most persuasive single number or case]

Please output four versions:
1. **One-liner** (within 30 characters): for a business card or social bio, with no words like "empower," "one-stop," or "solution"
2. **Elevator version** (100 characters): explained to someone who knows nothing about this field, starting from their familiar daily experience
3. **Homepage version** (300 characters): with a "problem → how painful the status quo is → how we do it → actual results" structure
4. **Version for investors or big clients** (200 characters): emphasizing market size and repeatability

Also list:
- **Three phrasings to avoid**: because outsiders will misunderstand them
- **One most-useful analogy**: comparing what we do to something everyone understands

Traditional Chinese, Taiwan usage, professional tone but not pretentious.