에너지절약 포스터

Depict an inviting energy-saving poster concept inside a sunlit home: a hand switches off an unused lamp while an insulated window, smart thermostat, and folded blanket quietly reinforce efficient living. Build a bold vertical composition with the hand as the focal point, combine warm sunlight with cool green shadows, use flat geometric shapes and a mustard, teal, cream, and charcoal palette, leaving open space for later copy. No text, no watermark.