会呼吸的房子绿色建筑节能宣传海报

A poster on green buildings and energy-efficient homes. Light bamboo green and warm grey background. Simple line drawing of a house with a leaf-shaped window and heat recovery ventilation symbol. No 3D rendering, no glossy textures. Paper texture and slight grain for analog feel. Chinese title "会呼吸的房子" prominent. Secondary text with building energy statistics. Bottom left or right: QR code placeholder with "扫码测算能效等级" text. The design should look like an educational brochure or municipal housing campaign, matte and clear, no human figures. Aspect ratio 2:3.