Halloween E-commerce Livestream Background

Professional Halloween e-commerce livestream background, vertical 9:16, flat-vector night scene. [Colors] Deep plum gradient (#3B1B63 to #7A3FA0), moon in pale lavender-white (#EAE2F5), product in violet-cream swirl, pumpkin accents in #F5A02C. [Layout] Centered stacked title at top, a coupon stack panel at left middle, a large moon disc center-right, castle silhouette on the right horizon, product hero bottom-right, a three-icon service row along the base. [Typography] Decorative art-nouveau display face with curled finials for the headline, small bold caps inside coupon chips, plain sans for service labels. [Subject] Tall cup of layered purple sweet potato frappe topped with cream, blueberries and a tiny witch hat; a black cat figurine wearing a witch hat perched on the rim; cobweb strands drawn across the moon. [Lighting & Mood] Glowing moon backlight, purple foggy ridges, nocturnal and candy-colored. [Details] Sale chips reading 'Limited Time', 'Flash Sale 9.9', 'Storewide 20% Off', 'Lucky Draw', dotted price rows, soft glow blooms on every light source.