Subject: rolling golden sand dunes, wind-formed fine rippled sand surface, clear cloudless pale blue sky. Scene: vast and endless desert wilderness, sand dunes stretching far into the distance, a quiet and remote pure natural desert secret realm. Style: high-definition realistic digital art, sharp and delicate natural landform details, extremely soft light and shadow layers. Color palette: warm and gentle golden sand dunes, light and pale blue sky, clean and pure contrast between warm and cool colors, unified and healing overall tone. Light and shadow: natural light slanting over the sand dunes, forming soft light and shadow contrast on the slopes, fine and three-dimensional light and shadow on sand grain texture. Composition: wide panoramic composition, sand dune curves extending horizontally to expand space, simple and grand division between sky and land. Usage: suitable for geographical exploration promotion, travel landscape posters, mobile and computer wallpapers, healing-themed illustrations, natural documentary background materials.