This is a digital composite artwork full of sci-fi color and dreamy atmosphere, perfectly fitting the theme of 'Future City'. The image uses a unique multiple exposure or layering technique to cleverly blend the silhouettes of towering skyscrapers with colorful sky clouds. The buildings in the foreground have hard lines and strong geometric shapes, presenting an order of modern urban aesthetics; while the background features flowing clouds rendered in gradients from warm yellow and orange-red to pale purple and deep blue, as if placed in a fantasy skyline at dawn or dusk. The overall tone is bright and transparent, creating a visual experience that is both grand and tranquil, symbolizing the harmonious coexistence of technological development and the natural environment. It is suitable as a high-definition wallpaper showcasing future visions or seeking spiritual healing.