5% Niacinamide Serum Clinical Promotion

[Format] Professional e-commerce product main image, square 1:1, clinical-lab skincare promotion style with cool white set dressing and purple accents. [Colors] Background is a bright laboratory white-grey, near #eef0f4, with blurred glass beakers and soft equipment bokeh. Accents are violet and lavender on the bottle graphics and text, silver chrome on the cap, and red plus purple on the bottom offer bands. A thin white top band carries event dates. No frame border. [Layout] The top strip holds a logo chip and dates. The main spec headline sits directly beneath in large purple-black type. The hero bottle stands centre-left on a white plinth block with a round sales-rank badge on its left. The right column carries the ml offer and gift set photos. Two stacked price-and-coupon bars close the middle-bottom, with a final membership strip at the very bottom. [Subject] A tall white serum bottle with a brushed silver cap and a soft violet-to-white gradient label, sharp and studio-lit on a plinth; beside it a miniature patterned purple serum vial and a small round moisturiser jar with a lavender label, arranged as the gift duo. No people. [Headline] Main: "5% Niacinamide - Brighten, Whiten, Fade Spots" in heavy dark caps with the percentage emphasised. Left round badge: "Firming Serum, Sales Ranking No.1". Right column: "Buy 150ml" with the numeral giant in purple, "Get 166ml Total" beneath, then a pill "Free Gift With 1 Set" and a small line "Anti-Aging Eye Cream 10ml x1 + Light Moisturiser 6ml x1". Mid bars: "Final Price $299" huge, then "Event price $399 - $50 - $50" in red numerals. Bottom strip: "Spend $199, add $15.9 for a toner" and "Join for $0.01, get three 15g whitening masks". [Mood] Clinical, proof-driven and promo-dense; sterile white lab light with violet skincare elegance and stacked deal bars.