极简悬浮薄板：一片屋顶与两根细柱

Design an urban bus shelter reduced to the absolute minimum. Show a single very thin horizontal roof plane — no more than 80 millimetres deep at its edge, tapering to an even finer line — floating above the pavement on just two slim cylindrical columns placed asymmetrically, so the plane appears to hover with no visible means of support at three of its corners. Detail the underside as one clean unbroken surface in a pale matte finish with a fine continuous light line recessed along its centre. Show a single bench of one solid slab, cantilevered from one column with no legs touching the ground, in a warm timber that contrasts with the cool grey structure. Detail the absence of everything else: no side panels, no back wall, no advertising, no signage beyond a slim stop marker on one column. Show the shelter on a wide clean pavement with a street tree and a modern building behind. Show late-afternoon sun casting the plane's crisp shadow across the pavement. Photorealistic, minimal, pale grey and warm timber, low three-quarter view.