II. 變奏 Variation 《風過之城》

Orchestral piano theme variation, 72 BPM, emotional progression with gentle dynamic lift, 6-7 minutes. Piano melody in lower register first, then move to higher octave with string counter-melody. Add subtle rhythmic pulse using soft orchestral percussion (brush snare or low timpani swell). Avoid dramatic climax, keep emotional restraint. Strings layered gradually (violin, viola, cello). Allow melodic expansion but preserve main theme identity. Mood: walking through familiar streets where memories echo, wind carrying fragments of the past.