Luxurious Niacinamide Lotion Sale Promo

[Format] Professional e-commerce product main image, square 1:1, rich purple promo style with golden-lit skincare tubes and bold sale chrome. [Colors] Background a deep violet gradient (#6a3fa0 to #8a5cc0) with a lighter purple platform step. Tubes in pearlescent cream-gold with bronze caps. Accent coupon card in gold and amber, red discount circle, red-to-gold bottom band. No frame border. [Layout] The left half shows three skincare tubes of graduated sizes standing on a lit purple podium. The right half carries a two-line headline with a coupon ticket card below, plus a red discount circle at the lower left. A red-to-gold band across the bottom holds the sale date and quantity offer. [Subject] No people. Three squeeze tubes of body lotion in a pearlescent cream finish with embossed gold ornamental branding and shiny bronze caps — one tall 75ml, one medium 60ml and one small 15ml with a gold screw cap — arranged in a descending line with soft reflections. [Headline] Right side: "Niacinamide Lotion" and "Nourishing Repair" in large white and gold characters with thin rules. Below, a gold coupon ticket reading "$30 COUPON" over "Valid on orders over $200". Lower-left red circle: "Dec 12 special $298". Bottom band: gold text "Sale starts Dec 12, 12:00 AM sharp" and beneath it "First 200 sets save $30" in heavy white. [Mood] Luxurious yet deal-forward; regal purple with gold and red accents, a glossy premium feel that still reads as a bargain.