赛博朋克写实3D渲染，8K超高清画质，赛博朋克风格外置机械义肢直立放置在深灰色高反光哑光地面上，背景为从深黑平滑过渡到灰蓝的渐变纯色背景。义肢上部膝关节结构采用抛光银色拉丝金属材质，外露银色液压管道与精密齿轮转轴结构，关节边缘环绕粉蓝渐变霓虹发光带；小腿外壳为黑色斜纹碳纤维材质，表面印着流动感的粉色霓虹闪电纹路，侧方外露红黄色束装信号线与青蓝色蚀刻电路板纹理；足部为磨砂银灰色金属材质，表面带细微使用划痕与磨损痕迹，搭配黑色橡胶防滑鞋底。采用居中平视景别，柔和轮廓主光从侧方打来，地面清晰反射义肢发出的粉紫色霓虹光晕，整体冷调氛围感，金属材质反光真实自然，科幻工业质感强烈，1:1正方形画幅。

Cyberpunk realistic 3D rendering, 8K ultra HD quality, a cyberpunk-style external mechanical prosthetic leg standing upright on a dark gray high-reflective matte floor, with a solid gradient background smoothly transitioning from deep black to gray-blue. The upper knee joint structure of the prosthetic is made of polished silver brushed metal, with exposed silver hydraulic pipelines and precision gear rotating shaft structures, surrounded by pink-to-blue gradient neon light strips along the joint edges. The calf shell is made of black twill carbon fiber material, with flowing pink neon lightning patterns printed on the surface, exposed red-yellow bundled signal wires and cyan etched circuit board textures on the side. The foot is made of frosted silver-gray metal, with subtle usage scratches and wear marks on the surface, paired with a black rubber anti-slip sole. Shot at eye level with centered framing, soft contour main light comes from the side, the floor clearly reflects the pink-purple neon halo emitted by the prosthetic, overall cold-toned atmosphere, realistic natural metal material reflection, strong sci-fi industrial texture, 1:1 square aspect ratio.