A hard-edged, high-contrast Japanese sci-fi manga style, similar to the brushwork of Tsutomu Nihei, using dense hatching and large areas of solid black shadow to create a sense of volume and decay. Employ an extreme wide-angle or fisheye lens composition, presenting the steel fortress from an extremely low-angle shot. The main structure occupies the vast majority of the frame, its top disappearing into an unreachable darkness, creating an illusion of infinite extension. The horizon line is pushed extremely low or is even invisible. To emphasize the scale, a tiny human silhouette or a lone searchlight beam can be placed in the foremost corner of the frame, creating a stark contrast with the massive structure. The building's silhouette is not made of simple straight lines, but a complex assembly of countless intersecting giant pipes, heat sink fins, heavy blast doors, and structural supports. The lighting and shadow design is key to creating tension: 1. The light source is singular and highly directional, such as a faint glimmer of light from a crack in the cavern ceiling or the single beam from a searchlight in the foreground. This light only illuminates a portion of the building, forming a sharp, diagonal slash of brightness across the frame. 2. The vast majority of the structure is hidden in deep, flat black shadows, with only the cold metal outlines traced at the edge of the light. The shadows are not empty but are filled with details created by dense hatching, suggesting complex structures within. 3. Rust is central to expressing texture. In the illuminated areas, large patches of peeling rust and streaks of rust-colored water flowing down the structure are clearly visible (can be represented with thicker lines and a screentone effect). 4. The background is pure darkness, further enhancing the sense of claustrophobia deep underground and the isolation of the structure.