Festive Red Christmas Live-Selling Stage Backdrop

Christmas live-selling stage background, vertical, built as a glossy red gallery room. [Colors] scarlet #C3111C, maroon #7C0A10, cream coupon cards #F4E9D6, holly green, metallic gold. [Layout] a garland swag with baubles across the top, a three-dimensional lit arch doorway centred, layered extruded headline floating in front of it, a pill subtitle beneath, a hanging coupon stack with a Santa hat on the right, and a snow-capped shelf near the bottom carrying three cream panels. [Typography] chunky extruded 3D display face with a warm gradient and hard shadow, rounded sans for the small lines. [Subject] an empty polished red interior used as a product stage — no figures except the hat; the drama comes from the arch and its rim light. [Lighting & mood] stage spots, floor reflections, high-energy retail. [Details] hanging ornaments, pine branches, snow drift ledge, gold bell, spotlight pools; text "HOLIDAY MEGA SALE", "BUY 3 GET 1 FREE", "SPEND 500, SAVE 30".