椭圆天窗下的混凝土折梯

An empty exposed-concrete stairwell spirals gently around an oval opening, one elliptical skylight projects bright light onto the lowest landing. Architectural photograph with clean verticals, believable railing and step spacing, warm gray concrete pores, no people or furniture. Square 1:1 standalone finished image. No text, logos, watermark, border, multi-panel layout or contact sheet.

空旷清水混凝土楼梯间围绕椭圆开口缓缓转折，一处椭圆天窗把亮光投在最低的平台上。建筑摄影，垂直线端正，栏杆与台阶间距合理，暖灰混凝土孔隙可见，没有人物或家具。 方形1:1独立完整成图。不要文字、标志、水印、边框、多格排版或联系表。