High-resolution scientific talking-head video,
fixed camera, locked framing, upper body visible,
no camera movement,
professional laboratory lighting optimized for short-video platforms,
global brightness intentionally elevated,
facial skin exposure locked as absolute priority,
no overexposure, no clipped whites,
highlights preserved on face and lab surfaces,
full laboratory environment visible and clear,
background brightness capped below facial exposure,
no blown highlights anywhere in frame,
female researcher @liuyan7,
wearing white lab coat and white shirt,
clean, professional, scientific appearance,
facial skin in ideal healthy condition,
skin smooth, elastic, hydrated, refined,
fine lines visually softened by lighting,
no emphasized wrinkles,
complexion corrected to remove yellow or gray cast,
fair skin with healthy pink undertone,
white-and-pink clarity, translucent and bright,
skin looks clean, even, and youthful,
natural skin only, no makeup, no lipstick, no blush,
skin quality achieved by lighting and exposure only,
no beauty filter, no artificial smoothing,
image sharp, high micro-contrast,
facial details clear even after platform compression,
no blur, no haze,
@liuyan7 looks directly into camera and speaks provided script only,
”水杨酸一用就爆皮、刺痛？ 别怪皮肤娇气——是刷酸逻辑错了。 斗没好，屏障先受损——问题不在皮肤弱，而是酸类持续剥脱角质，角质根本来不及修复。”
中景，实验室场景，@liuyan7 穿着白大褂站在工作台前，手持透明试管，神情认真。镜头缓缓推进，她将一滴透明液体滴入溶液，画面穿插微观动画：水杨酸颗粒剥脱角质层的动态过程，皮肤屏障受损示意。