街式滑板场：磨蹭杆、平台与阶梯组

Render a street-style skate plaza in a park — an urban obstacle course rather than a bowl. Show a smooth power-floated concrete plaza with a set of discrete street elements arranged with generous run-up between them: a low ledge with a steel angle-iron edge, a flat bar and a round rail at two heights, a three-stair with a hubba ledge alongside, a manual pad, and a low bank-to-ledge. Detail every metal edge as scarred and polished bright by wax and trucks, with the concrete beside it stained dark from wax. Keep the concrete finish honest — control joints in a considered pattern, slight colour variation between pours. Show the plaza sunk half a metre below the surrounding park so its edge doubles as a continuous seating step, with skaters sitting and boards leaning. Include a bin, a water fountain and a shade tree at one corner. Show late-afternoon light with long shadows and one skater mid-trick. Photorealistic, grey concrete and worn steel, energetic, low eye-level view.