Generate a chat sticker meme sheet.

Character:
{{character_description}}

Caption theme:
{{copy_theme}}

Specific caption input:
{{copy_texts}}

Layout requirement:
{{layout_style}}

If the specific caption input is empty, says "auto derive", or only contains a few lines, derive 16 Chinese chat-sticker captions from the caption theme. The theme may be a broad topic, chat situation, emotional direction, target audience, or relationship context. The user does not need to write all 16 captions in advance.

If the user provides fewer than 16 specific captions, preserve their tone and core ideas, then complete the set to 16 captions. If the user provides more than 16 captions, select the 16 strongest, most emotional, and most chat-sticker-friendly lines. Do not number the captions. Do not draw a list. Do not write labels such as "cell 1" or "sticker 1".

Caption requirements:
- Each caption should be short, direct, and plausible for a real Chinese chat sticker.
- Keep the captions centered on the theme, but vary the emotional state and wording across the 16 cells.
- They may include teasing, stubbornness, muttering, perfunctory replies, collapse, sarcasm, clinginess, giving up, or absurd humor.
- Avoid polite customer-service tone, standard reply templates, overly serious wording, or ad-like copy.
- Chinese text should be as readable as possible. It may be slanted, shaky, uneven, and hand-written, but it must not become random gibberish.

Theme visual element inference:
- Do not only change the character's expression; infer props, settings, symbols, and actions from the caption theme.
- If the theme includes an occupation, audience, relationship, scene, event, or fictional world, add matching visual elements: occupational themes can include work tools and environments, relationship themes can include interaction gestures and chat symbols, event themes can include triggers and aftermath states, and fantasy or IP themes can include world-specific props and signature mood.
- For example, "programmer stickers" should naturally include computers, keyboards, code, bugs, error popups, requirement documents, coffee, badges, and late-night work scenes; "couple daily life" should naturally include chat bubbles, clingy gestures, gifts, blankets, and phone messages.
- At least half of the 16 cells should contain clear theme-related visual elements. These elements should interact with the character, expression, and caption, not sit as isolated decoration.

Image structure:
- Create 16 independent stickers arranged in a 4x4 grid.
- Each cell should contain a small character action, an expression, and one matching caption.
- Keep a clear four-row, four-column arrangement with visible cell boundaries or spacing. Do not scatter stickers loosely across a plain white canvas.
- The overall layout should be clear. The inside of each cell may be casual, rough, and doodle-like.
- If the layout requirement is empty, default to a 4x4 chat sticker sheet preview with independent clear cells and no need for decorative borders.

Character rules:
- All stickers should revolve around the same character identity, while changing pose, expression, proportion, and simplification from cell to cell.
- Do not aim for realistic consistency. Aim for "consistent hand feel": it should feel like the same person repeatedly drew the same character with the same doodle approach.
- Preserve the minimum recognizable traits, such as color, hair, silhouette, outfit, symbolic item, species, or object identity.
- Facial features may drift, proportions may break, structure may be wrong, and details may be missing, but the character should not turn into a completely different subject.

Visual style:
- Make it look like 16 quick chat doodles drawn in a computer paint app, with 16 chat captions written alongside them.
- Hand-drawn doodle, MS Paint style, slight copying distortion, rough but funny.
- Lines should be shaky, unstable, and visibly jagged; forms should be clumsy, off-proportion, stick-figure-like, or highly simplified.
- Do not make the image polished, correctly proportioned, clean-lined, or professionally designed.
- If the image starts looking polished, cute-commercial, or like an AI-designed sticker pack, it has drifted off target; pull it back toward rough, casual, joke-forward doodles.

Text-image relationship:
- The text must feel drawn by hand, not added as clean typography afterward.
- Let the writing look mouse-written: crooked, shaky, uneven in size, and placed casually.
- Captions may sit beside the character, on the character, above the head, in a corner, or near the edge.
- Image and text should feel produced in the same act: drawing the character while casually writing the joke.
- Captions and expressions may match precisely, or drift slightly off-topic for absurd humor.

Final goal:
Output a 4x4 Chinese chat sticker meme sheet. It should feel like "16 quick chat doodles based on the character, each with a different emotion and joke, rough but funny", not like "AI designed a polished unified sticker pack."