聚焦 “护理 - 少脱发 - 浓密效果 - 下单”，完成闭环，强化卖点） 分镜 115-18s洗发步骤 3 - 头皮按摩 + 毛囊激活「Macro shot of foam applied to hair roots, fingertips massaging scalp in circular motions (focus on sparse part), subtle green/gold hue from ingredients (no glow), tiny blonde vellus hairs emerging (ultra-realistic, no animation), relaxed expression」 分镜 218-21s洗发步骤 4 - 彻底冲洗「Medium shot of her rinsing hair under running water, foam melting away (water clear), massaging scalp to avoid residue, hair floating softly, no visible hair fall during rinsing, bright shower light」 分镜 321-24s洗发后 - 梳理少脱发「Close-up of her detangling wet hair with a wide-tooth comb, comb gliding smoothly, only 1-2 strands on comb (minimal hair fall, no bald spots), hair appearing fuller, soft combing sound, satisfied smile」 分镜 424-27s产品特写 - 三角形强化（无标识）「Static close-up of the triangular green shampoo bar with subtle water droplets (post-use texture), henna leaf + polygonum root on both sides, clean white background, soft plant rustling sound, focus on pure shape」 分镜 527-30s最终效果 + 引导下单「Close-up of her dry, voluminous blonde hair (dense part, no visible scalp), fingers combing through thick strands (no hair fall), then cutting to her holding the triangular bar (centered), “click” sound (purchase cue), warm fresh tone」