奇幻替换：纳米香蕉背景下的珠饰胸针

创作一张精致的产品摄影图：一枚华丽的珠饰胸针居中、完整可见，清楚呈现珠子纹理、金属工艺、别针结构与真实高光。将单调背景替换为由深午夜蓝天鹅绒与微弱发光的植物形态构成的幻想场景，同时保持胸针本身不变、清晰对焦且没有变形。采用受控的摄影棚构图、柔和方向性主光、轻微轮廓光、细腻接触阴影与高级编辑质感。背景应有丰富视觉层次，但不能压过首饰主体。不要人物、可读文字、标志、水印或额外首饰。

【English Prompt】
Create a refined product photograph of an ornate beaded brooch, centered and fully visible, with carefully resolved bead texture, metalwork, clasp details, and realistic highlights. Replace the plain background with a fantasy setting built from deep midnight-blue velvet with faint luminous botanical shapes, while keeping the brooch itself unchanged, sharply focused, and free of distortion. Use a controlled studio composition, soft directional key light, gentle rim light, subtle contact shadow, and a premium editorial finish. Keep the background visually rich but subordinate to the jewelry. No people, no readable text, no logos, no watermark, no extra jewelry pieces.

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