guizang-social-card-skill/references/portrait-fill.md

Portrait Fill Rules

3:4 social images have much more vertical space than a horizontal PPT slide. A layout that works in 16:9 often becomes a thin strip in 3:4. Solve that at the planning stage.

Vertical Zones

Think of a 1080x1440 Rednote image as five zones:

Zone	Typical Height	Role
Header/meta	56-90px	issue label, category, page
Title/lead	240-420px	hook and claim
Evidence/body	520-760px	image, ledger, diagram, comparison
Bottom strip	90-180px	captions, checklist, summary
Footer	52-86px	issue/page metadata

Not every page needs all five, but every page needs an intentional vertical composition.

Underfilled Page Smells

Revise if:

• A table or ledger occupies less than 45% of the canvas height.
• The lower 25% of the page is empty without being an atmospheric hero page.
• Four list items are rendered as short rows with large blank space below.
• A screenshot is small even though it is the evidence.
• Body copy is centered in the middle with no top/bottom rhythm.

Fixes For Thin Tables

When a table is too short:

1. Increase row height to 118-170px.
2. Add a left marginal column with large numbers, keywords, or category labels.
3. Add a pull quote column beside the table.
4. Add a top or bottom issue strip with 2-3 consequences.
5. Convert the table to M08 Tall Ledger.
6. If there are only 2-3 points, use M04 Pull Quote or M09 Atmospheric Thesis instead of a table.

Fixes For Sparse Text

If a page has only one core sentence:

• Use M09 Atmospheric Thesis with visible WebGL/ink background.
• Make the sentence the hero, not a small paragraph.
• Add one small source/context row.
• Use dark/ink page if the package needs rhythm.

Fixes For Screenshot Pages

If screenshot content matters:

• Give it 45%-65% of the page height.
• Put only one key sentence above it.
• Use a bottom caption band instead of a side paragraph.
• Crop carefully; preserve readable UI labels.

Page Rhythm

For a 7-page Rednote set, use at least 5 distinct shapes:

• Cover / feature image.
• Essay split.
• Tall ledger.
• Evidence screenshot.
• Pull quote or atmospheric thesis.
• Checklist/comparison.
• Closing note.

Avoid repeating title + lead + 3 rows more than twice in one set.

Minimum Occupancy

As a rough rule, the active composition should occupy at least 78% of the page height.

This can include:

• Large type.
• Images/screenshots.
• Ledger rows.
• Background atmosphere on hero pages.
• Caption bands.
• Marginalia columns.

Whitespace is good only when it is designed. Empty leftover space is not.