Cobalt Blue Serum Bottle Premium Skincare

[Format] Professional e-commerce product main image, square 1:1, sleek minimal skincare advertising style with an airy lilac gradient. [Colors] Background is a pale lavender-to-white vertical gradient with faint diagonal light bands; primary accents are charcoal-grey thin type and the vivid cobalt-blue bottle. No frame border. [Layout] Upper-left: a small grey sans-serif brand line with a sub-caption. Left column beneath: two lines of light-grey headline, a thin rule, then "NEW" with a price note. Bottom-left: a circular outline seal with rotating text. Right half: the tall bottle standing with a soft reflection. [Subject] A tall cylindrical serum bottle in glossy cobalt-blue glass with a brushed silver cap, a subtle darker swirl motif printed on the body, standing upright with a faint mirror reflection on the pale floor. [Headline] Upper-left: "Skin Repair" in light charcoal caps, then "Natural protective veil" beneath in the same thin style, then a hairline rule with "NEW - new lower price" in small grey letterspaced caps. Bottom-left: a thin circular seal with curved text "Authentic guarantee - direct from the maker" around a small centre mark. [Badges] Only the thin circular outline seal at bottom-left. [Mood] Cool, understated and premium; misty lilac air with one saturated cobalt-blue hero and airy thin typography.