会员促销海报设计卡通风年终回馈会员场景领取元素

帮我生成3:4比例，Youth membership promotion poster, dynamic and vibrant event style. The background is a gradient of {green} to white with flowing, dynamic curves of {green} and {green}. At the top, enormous bold white text reads "{年终回馈 会员专享}", with a small {yellow} trumpet decoration floating beside it. Below the title, a {blue} tag label reads "{精选好物 会员价}". The central visual focus is a hand holding a {black} card with the words "{尊享}" and "{黑卡会员}" visible on it, the card is surrounded by a thin circle of light. Scattered around the card are cute decorations: a {purple} mini camera, a {green} gift box with a ribbon, and a {pink} cartoon box with a small emoji expression. At the very bottom, a {green} button with the text "{立即领取}". The overall color scheme is bright and eye-catching, using social media popular colors. Clean, commercial art style, high detail. --ar 3:4