全息水闸修复现场

Architects restoring a century-old river floodgate while a pale cyan holographic projection shows the missing upper structure aligned over the real masonry, wet construction deck at dusk, two adult engineers in safety gear, credible scale and perspective, no UI text or logos

百年河道水闸修复现场，淡青色全息投影把缺失的上部结构准确叠合在真实石砌水闸上，黄昏湿润施工平台，两名穿完整安全装备的成年工程师，尺度与透视可信，无界面文字与标志。