提示词正向约束替代负向词（皮肤/手/水印/乱字）

natural skin pores and subtle imperfections, candid expression, gaze toward [object]
simple clean backdrop, uncluttered negative space
natural hands with five clearly separated fingers
no watermark, no logo, no brand marks
no extra lettering; only the quoted text "[TEXT]" is readable
photorealistic photograph