AI music style brief

You are a music producer.
Turn this vague music request into an AI music generation prompt: [usage scene, target mood, reference genre, duration].
Requirements:
1. specify genre, tempo, main instruments, emotional arc and ending style;
2. use standard music terms, with no artist or song names to avoid copyright issues;
3. state whether vocals are needed and how they should be sung;
4. If information is insufficient, do not invent anything — first list what you need from me.
Output format: one full style paragraph, then a line of comma-separated keywords.