手绘风蓝天海洋白云插画素材

8k ultra-clear abstract art background, simple style, blue as the main color, gradient from light blue to dark blue, with white and light blue embellishments, delicate brushwork and texture, hand-painted texture, background color from top to bottom Gradually light, creating a dreamy atmosphere, tranquil, fresh and dreamy visual effects, conveying calm and relaxed emotions, symbolizing natural scenes such as the sky and ocean