A retro-style engineering exploded view diagram of Zhuge repeating crossbow, isometric decomposition view showing ancient mechanical structure. Central complete 3D model surrounded by disassembled components including bow arms, trigger mechanism, arrow magazine, each labeled with Chinese calligraphy text lines. Aged parchment texture background with slight wear and ink stain effects, traditional Chinese engineering blueprint style. Soft natural lighting highlighting three-dimensional details and texture, delicate shadow rendering. Antique seal element in bottom right corner, overall vintage historical atmosphere.