A sleek, black and gold mecha arm with advanced materials and futuristic design elements. The prominent shoulder pad is on the left side of its upper body, while it holds out an open palm for dynamic action poses. It features multiple visible mechanical parts beneath skin, adding to its high-tech appearance. This detailed concept art captures every detail in an ultra-realistic digital rendering style in the style of digital rendering. White background. --ar 3:4 --style raw --stylize 1000 --v 6.1

一只流线型的黑金机械臂，采用先进材料和未来派设计元素。突出的大肩垫位于其上半身的左侧，张开手掌以进行动态动作姿势。它的表面下可见多个机械部件，增强了其高科技外观。这幅详细的概念艺术作品以超现实的数字渲染风格捕捉每一个细节，背景为白色。