Female Fitness Coach Portrait

Generate "Female Fitness Coach" realistic portrait prompt: fitness portrait of a female yoga instructor, sporty athletic wear, peaceful pose on yoga mat, bright studio background, soft daylight, wellness photography, calm smiling expression, realistic detail, 50mm lens 要求：① 英文提示词；② 中文要点：瑜伽垫场景、舒展姿势、健康气息。