海报的背景是清晨的公园，阳光透过树叶洒下，主角是一位正在跑步或做瑜伽的健康人士，衣着轻便，神情愉悦，画面清新自然，色调温暖明亮，传递积极健康的生活方式。
AI绘画提示词(prompt)：
An advertisement poster set in a morning park with sunlight streaming through the trees. The focus is on a person running or doing yoga, dressed in comfortable clothing, looking happy and energized. Fresh and natural scene with warm, bright tones, promoting a positive and healthy lifestyle.