15s AI video, 9:16 vertical screen, 30fps, hyper-realistic commercial style, soft natural hotel lighting, ultra-sharp details, seamless smooth transitions, no subtitles, no watermarks, no text overlay. Subject: American white woman with jet-black hair, setting: modern luxury hotel room & bathroom1 (3s): Extreme close-up of her black hair, severely greasy and clumpy strands, prominent white dandruff at the roots, dull and lifeless texture, blurred warm hotel ambient light in the background, full focus on hair’s greasy and dandruff problem2 (3s): Medium close-up, a slender female hand reaches into a stylish women’s handbag on the hotel fabric sofa, smoothly take out a shampoo bar, camera follows hand movement naturally, keep the hotel sofa texture in the background3 (3s): Close-up, hotel bathroom shower head with gentle continuous water spray, hands hold the shampoo bar under the water flow, rub slowly to create dense, fluffy light green foam, foam texture is clear and delicate, water flow brushes the foam edges4 (3s): Medium shot, the woman stands under the shower head (water off) in hotel bathroom, wrapped in a clean white bath towel, her black hair fully covered with thick light green foam, hands gently scratch and massage hair in natural motions5 (3s): Slow motion medium close-up, the woman in a soft white bathrobe, her black hair freshly washed and blow-dried—super fluffy, smooth and shiny with zero greasiness & dandruff, hold the shampoo bar in one hand, flick hair lightly with the other, hair flutters elegantly and smoothly, warm soft hotel ambient light, perfectly highlight the silky and voluminous hair texture