楼梯与坡道并置：同一桥头的两种上桥方式

Render the landing point of a pedestrian overpass where a stair and an accessible ramp arrive together, composed so neither feels like the afterthought. Show a straight flight of stairs rising directly toward the deck with generous treads, a consistent riser height and a landing every ten steps, its handrails continuous on both sides and returning to the post at each end. Beside it, show the ramp folding back on itself in two long runs at a gentle gradient with level landings at each turn, wide enough for two wheelchairs to pass. Detail both as one structure sharing a single steel frame and a common balustrade language of vertical bars and a timber-topped handrail, so they read as one designed object. Show tactile warning surfaces at the top and bottom of both, and a handrail extension beyond the last step. Detail the ground plane where they land as a widened paved area clear of the footway so waiting does not block passers-by. Include people using both routes. Show bright daylight. Photorealistic, integrated, grey steel and warm handrail, three-quarter view.