Wan 公式样板（Entity+Scene+Motion+Sound）

Entity: A male barista with a short beard and apron.
Scene: A bustling third-wave coffee shop, morning light through large windows.
Motion: He steams milk with practiced motion, taps the pitcher, pours latte art into a white ceramic cup, looks up and slides it across the counter.
Sound: Steam wand hissing, milk frothing, cup clinking, soft indie pop background music, brief customer chatter.