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A highly detailed architectural illustration of a traditional Chinese courtyard house (siheyuan style), presented in a semi-realistic hand-drawn ink and watercolor sketch style. The composition shows a symmetrical layout with a central main hall building at the top, flanked by two side wings forming a U-shaped courtyard. The foreground features a traditional entrance gate with grey tiled roof, wooden double doors, and two stone guardian lion statues on both sides of the stairs. The courtyard inside contains a circular stone planter with a small green tree at the center.

The roofs are covered with layered grey ceramic tiles, slightly curved upward at the corners with elegant traditional Chinese architectural eaves. The walls are white plaster with subtle weathering and light shadows, while structural elements such as doors, columns, and beams are made of dark brown wood with visible grain texture.

Include additional small architectural sketch views at the top of the image: three smaller perspective drawings showing different angles of the building (front elevation, side perspective, and a simplified structural layout), drawn in thin black ink lines with minimal color.

Add fine details such as:

* Stone steps leading up to the main hall and entrance
* Wooden lattice windows on the buildings
* Potted plants and greenery placed around the courtyard and along the walls
* Soft shadows cast by buildings suggesting gentle daylight
* Two rolled architectural scrolls or blueprint tubes placed in the bottom-left foreground
* Light ink shading and watercolor wash in muted tones (grey, beige, soft green)

Style requirements:

* Hand-drawn architectural concept art
* Clean linework with ink outlines
* Soft watercolor shading
* Slight top-down perspective (isometric feel)
* Balanced, symmetrical composition
* Calm, minimalistic background (off-white paper texture)

Lighting:
Soft natural daylight, diffused shadows, no harsh highlights

Color palette:
Muted, natural tones — grey tiles, white walls, brown wood, green plants

Rendering quality:
Ultra-detailed, high resolution, sharp lines, professional architectural illustration, concept art style, 8k quality

Aspect ratio:
Square (1:1)

Negative prompt:
blurry, low detail, modern buildings, people, vehicles, bright saturated colors, messy composition, distorted perspective, photorealism, 3D render, cartoon style