Central focal point: a large, eye-catching banner that says "11.11 Big Sale" or "Crazy Lowest Prices," surrounded by shopping carts and discount tags. Vibrant Background: A bright gradient radial line that expands outwards with a small sparkle or firework effect to emphasize the festive atmosphere. Additional graphics: An illustration of a shopping bag filled with products, or a label with the words "Buy 2 large and get 1 small free". Color matching: Red and yellow are the main colors, with white or dark blue as embellishments.