黄铜古董指南针俯视特写

写实产品摄影风格，1:1正方形构图，纯白至浅灰无缝背景，正面俯视微距特写，主体居中并充满画面。画面是一件圆形复古航海指南针/罗盘：黄铜外壳，外圈布满细密竖向防滑纹，顶部有横向矩形提梁，底部有圆形金属吊环，右侧伸出带滚花纹理的圆柱形旋钮；表盘为黑灰色金属多层结构，外圈银色刻度环刻有方位字母N、E、S、W及密集刻度线，内圈有数字刻度与装饰性符号，中心为黑灰色菱形矛头指针，轴心为圆形铜色。光线均匀柔和，黄铜呈暖古铜色，表盘呈冷灰金属反光，边缘有细腻高光与浅阴影，整体复古工业质感，清晰对焦，细节锐利，无人物，无其他道具。

Realistic product photography style, 1:1 square composition, pure white to light gray seamless background, frontal top-down macro close-up, subject centered and filling the frame. A circular vintage nautical compass: brass outer shell with fine vertical ribbed texture, a horizontal rectangular top handle, a circular metal hanging ring at the bottom, and a knurled cylindrical knob protruding from the right side; the dial is a dark gray metallic multi-layer structure, with a silver outer scale ring engraved with cardinal letters N, E, S, W and dense tick marks, an inner ring with numeric graduations and decorative symbols, a black-gray diamond-shaped spear pointer at the center, and a circular brass hub. Even soft lighting, warm antique brass tones, cool gray metallic reflections on the dial, subtle highlights and soft shadows along the edges, vintage industrial texture, sharp focus, fine details, no people, no other props.