feat: update slide deck

skills/baoyu-slide-deck/references/styles/vector-illustration.md

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+# vector-illustration
+
+Flat vector illustration style with clear black outlines and retro soft color palette
+
+## Design Aesthetic
+
+Flat vector illustration with no gradients or 3D effects. Clear, uniform-thickness black outlines on all elements. Geometric simplification reducing complex objects to basic shapes. Toy model aesthetic that's cute, playful, and approachable. Panoramic horizontal compositions work well.
+
+## Background
+
+- Color: Cream Off-White (#F5F0E6)
+- Texture: Subtle paper texture, warm nostalgic feel reminiscent of vintage prints
+
+## Typography
+
+### Primary Font (Headlines)
+
+Large, bold retro serif for titles conveying authority and elegance. Think classic advertising posters. Clean letterforms with strong presence.
+
+### Secondary Font (Subtitles)
+
+All-caps sans-serif inside colored rectangular blocks. Label-like appearance. High contrast against block color.
+
+### Body Font
+
+Clean geometric sans-serif for readability. Futura, Avenir, or similar. Consistent weight throughout.
+
+## Color Palette
+
+| Role | Color | Hex | Usage |
+|------|-------|-----|-------|
+| Background | Cream Off-White | #F5F0E6 | Primary background |
+| Outlines | Deep Charcoal | #2D2D2D | All element outlines |
+| Primary Text | Black | #1A1A1A | Headlines, body |
+| Accent 1 | Coral Red | #E07A5F | Primary accent, warmth |
+| Accent 2 | Mint Green | #81B29A | Secondary accent, nature |
+| Accent 3 | Mustard Yellow | #F2CC8F | Highlights, energy |
+| Accent 4 | Burnt Orange | #D4764A | Tertiary accent |
+| Accent 5 | Rock Blue | #577590 | Cool balance, tech |
+
+## Visual Elements
+
+- All objects have closed black outlines (coloring book style)
+- Rounded line endings, avoid sharp corners
+- Trees simplified to lollipop or triangle shapes
+- Buildings simplified to rectangular blocks with grid windows
+- 2.5D perspective (isometric-like but more free-form)
+- Depth through layering and overlap, not atmospheric perspective
+- Decorative geometric elements: radiating lines (sunbursts), pill-shaped clouds, dots, stars
+- People as simple geometric figures with minimal facial detail
+
+## Style Rules
+
+### Do
+
+- Maintain consistent outline thickness throughout
+- Use soft, vintage color palette
+- Simplify all objects to basic geometric shapes
+- Create depth through layering
+- Add playful decorative elements
+
+### Don't
+
+- Use gradients or realistic shading
+- Create photorealistic elements
+- Use thin or varying line weights
+- Include complex detailed illustrations
+- Add slide numbers, footers, or logos
+
+## Best For
+
+Educational presentations, creative proposals, children's content, brand showcases, warm approachable topics, explainer content