知识课程封面海报

中文需求

知识课程封面海报，现代深色背景，抽象知识图形，清晰留白，适合后期添加课程标题。

英文提示词

Online course cover poster, modern dark background, abstract knowledge graphics, clean hierarchy, strong focal area, generous title space, professional education marketing style.

反向提示词

random text, childish layout, clutter, watermark, blurry

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