体育场围网：挡球高度与视觉穿透的平衡

Render a close study of the ball-stop fencing around a park sports court, treating it as a designed element rather than an afterthought. Show a system in two parts: a lower section of dark grey welded mesh panels about two metres tall with a fine square aperture and slim posts, and above it a much taller run of fine black knotless netting on slender tensioned cables, so the barrier reaches eight metres where balls fly but stays almost invisible against the sky. Detail the transition between the two systems as a clean horizontal rail. Show the posts as slim round hollow sections in dark grey, footed in small flush concrete pads set within the surrounding grass rather than a continuous kerb. Include a gate in the mesh section with a self-closing hinge and a kick plate. Show climbing plants trained on the mesh along one bay to soften it. Keep the court and its colours visible through the barrier. Show bright overcast light so the netting reads as a faint grey veil. Photorealistic, technical, dark grey and green, eye-level view along the fence.