沙漠高峰，孤影仰望

Minimalist dark sci-fi illustration. A single astronaut standing completely still on the absolute highest peak of a smooth dune. The astronaut stands exactly on the summit point, perfectly centered on the peak. Side profile view. Astronaut facing left. Strict 90-degree profile silhouette. Body, helmet and backpack aligned in profile. Astronaut posture is upright and static. Head tilted upward, clearly looking into the sky. The mountain is perfectly smooth and sculptural. No texture, no ridges, no rocks. Clean geometric dune shape. Very dark image. Low-key lighting. Matte surfaces. Soft smooth gradients only. Background is a dark charcoal to near-black gradient sky. No stars, no moon, no clouds. No environment details. Abstract, minimal, editorial illustration style. Monochrome grayscale. Flat graphic look. Calm, silent, static composition. Aspect ratio 16:9.