guizang-social-card-skill/references/platform-specs.md

Platform Specs

Use high-resolution exports. The user can downsample later.

Xiaohongshu / Rednote

Default size:

• 1080 x 1440
• Ratio: 3:4
• Export: PNG for text-heavy images, JPEG only when photo-only and file size matters.

Safe area:

• Side margin: 72-96px.
• Top margin: 72-112px.
• Bottom margin: 80-120px.
• Keep all text and key objects inside the safe area.

Recommended set:

• 1 cover.
• 4-8 content pages.
• 1 summary or checklist page if the article benefits from it.
• Optional Live Photo card for motion-heavy evidence. Use references/live-photo-production.md when making .pvt packages for AirDrop and iPhone testing.

Live Photo:

• Duration: up to 5s.
• Keep the same 1080 x 1440 / 3:4 canvas and safe area as static Rednote cards.
• Use Live Photo when motion is the evidence: fast generation, before/after UI, product interaction, app/game demo, scroll reveal, or process-to-result comparison.
• Package as .pvt for iPhone/AirDrop testing. Loose JPG/MOV pairs often import as separate assets.
• Publish path: AirDrop the .pvt package as one item to iPhone, then publish from the Xiaohongshu app. Desktop/web upload cannot be treated as the primary Live Photo publishing path.

Naming:

output/xhs-01-cover.png
output/xhs-02-<topic>.png
output/xhs-03-<topic>.png
...

Cover structure:

• Big title with a sharp hook.
• One strong visual: supplied image, screenshot, generated photo, or product object.
• Bottom line with 3-5 key points or a compact issue strip.
• Avoid long subtitles. Put nuance in later pages.

Content page structure:

• One idea per page.
• 12-30 Chinese characters for the title when possible.
• 2-4 short bullet fragments or one concise paragraph.
• If a page has a screenshot, reduce the text and give the screenshot enough area.
• If lower space is empty across pages, combine pages or add a functional element such as checklist, comparison row, quote, or image evidence.

WeChat Official Account Cover Pair

Generate a pair: one 21:9 main cover and one 1:1 square cover. Build both in the same HTML file, and include a combined preview section that places them together for visual checking.

21:9 Main Cover

Default size:

• 2100 x 900
• Ratio: 21:9

Use:

• Main article cover.
• Full or near-full headline, subtitle, and visual evidence.
• Keep title readable near center-left or within a clear safe band.
• Avoid an empty middle. Increase title scale, image scale, or spacing if the center feels hollow.

1:1 Cover

Default size:

• 1080 x 1080
• Ratio: 1:1

Default style:

• Short title only, simplified from the long title.
• Big type, center aligned.
• No image unless the user explicitly asks for one.
• No subtitle by default.
• Strong contrast and enough breathing room.

Short-title rule:

• Extract the core object and action from the long title.
• Keep it to roughly 4-10 Chinese characters, or 2 short lines when needed.
• Do not squeeze the full 21:9 title into the square.

Example:

Long: 开源了一个 Skill，让 AI 接管你屏幕边那张便签纸
Square: AI 接管便签纸

Naming:

output/wechat-21x9-cover.png
output/wechat-1x1-cover.png
output/wechat-cover-pair-preview.png

WeChat Official Account Article Live Photo

Observed support is upload-path dependent:

• iPhone upload can preserve Live Photo in Official Account article editing.
• Web upload does not expose the same Live Photo path.
• Keep Live Photo duration at or below 3s.
• Publish path: AirDrop the .pvt package as one item to iPhone, then upload from the iPhone Official Account article editing path.

Use the same 3:4 card standard as Rednote when the user wants a WeChat article body card. If the publisher must use the desktop/web path, export a GIF or short video fallback instead of promising Live Photo support.

Screenshot And Photo Placement

For supplied screenshots/photos:

• Put originals in assets/.
• Use CSS object-fit:cover only when cropping is safe.
• Use CSS object-fit:contain for UI screenshots, dense text, code, tables, or app windows.
• Set object-position deliberately: top for long UI when top matters, center for objects, 35%-45% vertical for portraits.
• Do not pin images to the canvas edge unless the design intentionally uses bleed.

Final Response Media

In Codex desktop, local media can be shown with absolute paths:

![cover](/absolute/path/to/output/xhs-01-cover.png)

Do this for the most important images, especially the cover and any pages the user asked to inspect.