feat(baoyu-infographic): add retro popup pop style

skills/baoyu-infographic/references/styles/retro-popup-pop.md

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+# retro-popup-pop
+
+Retro pixel popup × pop-art collage — content rendered as a stack of 80/90s desktop dialog windows with thick black outlines, flat color fills, and bright cyan or vintage cream backgrounds.
+
+## Color Palette
+
+- Background: Bright cyan (#12B8DE) primary canvas, vintage cream (#F5F0E6) alternate
+- Window fills: Vintage cream (#F5F0E6) and pure white (#FFFFFF)
+- Primary text and outlines: Pure black (#000000)
+- Reverse text: Pure white on solid black title bars
+- Accent fills (small areas only): Salmon pink, sky blue, mustard yellow, mint green — muted retro tones
+
+## Visual Elements
+
+- 80s/90s desktop popup windows with title bars, close buttons (×), and chunky borders
+- Multiple windows tiled or lightly overlapping with offset solid-black drop shadows for depth
+- ERROR / ALERT / WARNING dialogs to highlight misconceptions, common pitfalls, risks
+- File-window vignettes labeled with retro filenames (PROBLEMS.EXE, METHOD.PNG, BURNOUT.PSD, FOCUS_SCAN, SYSTEM_ALERT, IDEAS_MISSING)
+- Progress bars for completion, difficulty, conversion rate, or trend
+- Pixel-style chunky icons: folders, magnifiers, gears, exclamation marks, floppy disks, hourglasses
+- Action buttons with thick black borders and short pop-style copy: OK, CANCEL, FIX IT, SCAN, PLAY, RETRY, SAVE
+- Comparison data rendered as windowed lists or small tabular dialogs
+- Uniform thick black outlines on every window, button, icon, and divider
+- Pure 2D flat color fills throughout — no gradients, no glow, no glass
+
+## Typography
+
+- Headers: Pixel / dot-matrix / chunky bitmap display fonts, large and high-contrast
+- Body: Retro monospace or system-style sans-serif, high legibility
+- Title bars: Reverse white on solid black, all-caps preferred
+- Decorative all-caps English allowed for filenames, status strings, button labels (PROBLEMS.EXE, OK, CANCEL); body content text remains in the confirmed output language
+
+## Style Enforcement
+
+- Every information chunk must live inside a window, dialog, button, or progress bar — no floating elements
+- Uniform thick black outlines everywhere; offset solid-black drop shadows for stacked-window depth
+- Limit accent palette to ~4 colors per composition; let cyan or cream dominate the canvas
+- Maintain low-fi pixel/popup feel; humorous popup copy welcome, polished modern UI prohibited
+
+## Avoid
+
+- Modern UI styles: glassmorphism, neumorphism, soft shadows, blurs, gradients
+- 3D rendering, photorealism, ray-traced shadows
+- Hand-drawn wobble, watercolor washes, or sketch textures
+- Smooth anti-aliased curves on icons (prefer chunky pixel/stair-step edges)
+- Pure black backgrounds — keep cyan or cream as the canvas
+
+## Best For
+
+High-density "干货" knowledge guides, common-pitfall and debunking posts, knowledge-pop content for design-savvy or developer audiences, Xiaohongshu-style retro-tech posts, dense-modules portrait infographics.