chore: release v1.4.0

skills/baoyu-cover-image/references/styles/vector-illustration.md

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+# vector-illustration
+
+Flat vector illustration with black outlines and retro soft colors
+
+## Color Palette
+
+- Primary: Coral Red (#E07A5F), Mint Green (#81B29A), Mustard Yellow (#F2CC8F)
+- Background: Cream Off-White (#F5F0E6), subtle paper texture
+- Accents: Burnt Orange (#D4764A), Rock Blue (#577590), Deep Charcoal (#2D2D2D) outlines
+
+## Visual Elements
+
+- All objects have closed black outlines (coloring book style)
+- Rounded line endings, avoid sharp corners
+- Simplified geometric shapes
+- 2.5D perspective with layering
+- Decorative elements: sunbursts, pill clouds, dots, stars
+
+## Typography
+
+- Large bold retro serif for titles, clean geometric sans-serif for body
+
+## Best For
+
+Educational content, creative proposals, brand showcases, explainer content