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

一隻流線型的黑金機械臂，採用先進材料和未來派設計元素。突出的大肩墊位於其上半身的左側，張開手掌以進行動態動作姿勢。它的表面下可見多個機械部件，增強了其高科技外觀。這幅詳細的概念藝術作品以超現實的數字渲染風格捕捉每一個細節，背景為白色。