篝火燃烧熄灭

Only fire flame burning crackle with a clear ending. Pure campfire-like flame roar and soft crackling for most of the duration, then a short natural fade-out / dying-down tail so it finishes cleanly. Exactly 1.0 seconds oneshot. No paper whoosh, no ignition pop, no wind, no explosion, no voice, no bass boom, no UI click. Just fire burning with a proper ending.