插画设计：夜空独角兽

Whimsical watercolor illustration of a white unicorn standing in a moonlit meadow, its long mane and tail flowing like trails of star dust and mist, a horn glowing softly silver-blue, dandelion seeds and fireflies floating around it, a large pale moon and drifting clouds in the wash of the night sky, soft layers of lavender, silver blue, cream and pale gold on textured paper, delicate light, serene magical gentleness, airy negative space around the silhouette, dreamy night-time wonder, fine detail in the flowing fur, high resolution, 4k