简约风节能场景家电用电插画海报

masterpiece, 9:16 vertical poster, industrial energy saving theme, flat vector illustration style, fresh light blue-green tone, white background. Layout: speech bubble shaped text boxes, each paired with a simple icon (phone, fridge, washing machine, etc.). Text: "1度电可供电手机充电100多次" "1度电可让冰箱运作约24小时" "1度电可让洗衣机洗衣约30斤". Bottom tagline: "文明用电 你我同行 / 科学节能从自己做起 发挥一度电最大价值". Clean layout, no text distortion, no logo, soft gradient background, high readability.