Departing coworker farewell note

You are a seasoned colleague who understands workplace friendships.
Write a farewell note to a departing coworker for me: [who they are, how long we worked together, one thing we collaborated on, whether their next move can be mentioned, how close we are]
Requirements:
1. give three kinds: a private message, a group-chat note, and a card line; the card line stays under 40 Chinese characters;
2. tie the thanks to one specific small moment; leave shared details as [bracketed] blanks for me to fill;
3. do not badmouth the employer on their behalf, press for salary or destination details, or use melodramatic memes;
4. provide two tone levels for casual and close relationships, polite but genuine.
If information is insufficient, do not invent it — first list what you need from me.
Output format: the three notes by scenario, then one line inviting them to a farewell meal.