提示词An elegant, portrait-oriented composition focusing on the sweeping edge of a pale, creamy dune. The dune material has a fine, soft texture reminiscent of high-quality paper. A long, soft shadow stretches diagonally across the ivory background, creating dynamic negative space. The lighting is soft, diffused, and ethereal, suggesting early morning light. Medium is digital painting. The palette is extremely restrained: pale beige/cream, ivory white, and soft grey shadow. The curve of the dune is the clear focal point. Vertical 9:16 wallpaper; main subject in the lower-middle, quiet upper quarter for a lock-screen clock. Full-bleed artwork, no border, no frame, no text, no typography, no logos, no signature, no watermark.
