竹构顶棚：绑扎竹束弯成的连续拱

Design a public canopy built entirely from bamboo. Show a series of arches made by bundling four or five treated bamboo culms together and bending them into a tall parabolic curve, the bundles lashed at close intervals with black rope wrapped in tight neat bands, the arches set in a row so the space beneath becomes a long vaulted corridor. Detail the culms as varying naturally in diameter and colour — pale straw to warm olive — with their nodes clearly visible as rings along every length, so the material's irregularity is obvious and unhidden. Show diagonal bamboo bracing woven between the arches in a diamond pattern, tied rather than bolted at every crossing. Detail the covering as a loose woven bamboo mat laid over the upper third of each arch only, leaving the sides open, so daylight enters as fine linear stripes through the weave. Show the bases where each bundle meets the ground as a simple splayed steel shoe holding the culms clear of the wet paving. Set it in a tropical urban park with broad-leaved planting. Show bright filtered daylight. Photorealistic, handmade, warm straw tones against deep green, eye-level view along the vault.