建筑摄影：几何天桥

Photorealistic architectural photograph of a modern steel and glass footbridge crossing a highway, the bridge with a striking geometric frame of diagonal steel beams, a glass floor, a curved white canopy and its underside lined with glowing LED strips, the highway below with colorful streaks of car light trails from a long exposure, city towers in the background against a deep twilight sky with the first stars just appearing, a single cyclist crossing the bridge with a small red tail light, its headlight casting a small pool of light, strong symmetrical composition with the bridge's leading lines converging toward the center, cool blue-hour ambient light from above mixed with warm orange car lights below, night time, crisp long-exposure quality with fine film grain, futuristic urban mood, sharp detail on steel joints and glass reflections, 4k