感应启动：有人靠近才会发生的装置

Design a public artwork that stays dormant until someone approaches, so its behaviour is a response rather than a performance. Show a long run of forty slim vertical elements standing in a line along a walkway, each a two-metre steel stem topped by a small pivoting element — a metal flower, a fin, a lens. Detail the resting state as completely still and closed, the whole row inert and easily walked past without notice, deliberately unremarkable. Show the activated state occurring only in a localised zone: where a person is walking, the nearest six or seven elements have opened, tilted toward them and begun to glow, while everything beyond that zone remains dark and shut, so the person is visibly accompanied by a travelling pocket of activity. Detail the transition as legible in the image — two elements caught halfway open at the leading edge of the zone, and two just closing at the trailing edge. Show a second person further down the row with their own separate zone of response, the dark stretch between the two making the logic obvious. Detail the elements as matte dark grey so the glow reads strongly. Set it along a park path at dusk. Show blue evening light with warm activation glow. Photorealistic, responsive, dark row with a travelling warm pocket, low perspective down the line.