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 说：“A 醇精华放两天就分层，这种情况不少人都会遇到。