手绘风环保建筑绿化雨水净化插画素材

色系：蓝绿色系（冷调，呼应生态与水体）。A technical plan drawing of a cooling unit in a urban public space, showing integration of green spaces, blue systems, pedestrian paths, seating areas, and permeable paving. Use cool blue and green color palette, clean lines, axonometric view, with legend and scale. Professional landscape architecture diagram style, similar to IFLA competition boards.