神秘力量剪影：卷发粗胡须男士黑白肖像

json Gemini Nano Banana 3.0 Prompt: { "request": { "type": "image_generation", "parameters": { "dimensions": { "width": 1024, "height": 1024, "aspect_ratio": "1:1" }, "format": "jpg", "count": 1 }, "content": { "prompt": "Close-up black and white portrait of a man with tousled hair and a rough beard, tilting his head slightly upward as light falls dramatically from above. His eyes remain in shadow, creating a mysterious, powerful silhouette-like mood with strong contrast.", "negative_prompt": null } } }