diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
index 8ccb715..38112b5 100644
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -6,7 +6,7 @@
   },
   "metadata": {
     "description": "Skills shared by Baoyu for improving daily work efficiency",
-    "version": "1.3.0"
+    "version": "1.4.0"
   },
   "plugins": [
     {
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e762654..9d16d5b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,18 @@
 
 English | [中文](./CHANGELOG.zh.md)
 
+## 1.4.0 - 2026-01-18
+
+### Features
+- `baoyu-cover-image`: expands style library from 8 to 19 styles with 12 new additions—`blueprint`, `bold-editorial`, `chalkboard`, `dark-atmospheric`, `editorial-infographic`, `fantasy-animation`, `intuition-machine`, `notion`, `pixel-art`, `sketch-notes`, `vector-illustration`, `vintage`, `watercolor`.
+- `baoyu-slide-deck`: adds `chalkboard` style—black chalkboard background with colorful chalk drawings for education and tutorials.
+
+### Breaking Changes
+- `baoyu-cover-image`: removes `tech` style (use `blueprint` or `editorial-infographic` for technical content).
+
+### Documentation
+- `README.md`, `README.zh.md`: updates style preview screenshots for cover-image and slide-deck.
+
 ## 1.3.0 - 2026-01-18
 
 ### Features
diff --git a/CHANGELOG.zh.md b/CHANGELOG.zh.md
index a3bce55..8e32b46 100644
--- a/CHANGELOG.zh.md
+++ b/CHANGELOG.zh.md
@@ -2,6 +2,18 @@
 
 [English](./CHANGELOG.md) | 中文
 
+## 1.4.0 - 2026-01-18
+
+### 新功能
+- `baoyu-cover-image`：风格库从 8 个扩展至 19 个，新增 12 种风格——`blueprint`（蓝图）、`bold-editorial`（大胆编辑）、`chalkboard`（黑板）、`dark-atmospheric`（暗黑氛围）、`editorial-infographic`（杂志信息图）、`fantasy-animation`（奇幻动画）、`intuition-machine`（技术简报）、`notion`（Notion 风格）、`pixel-art`（像素艺术）、`sketch-notes`（手绘笔记）、`vector-illustration`（矢量插画）、`vintage`（复古文献）、`watercolor`（水彩）。
+- `baoyu-slide-deck`：新增 `chalkboard`（黑板）风格——黑色黑板背景配彩色粉笔绘画，适合教育和教程内容。
+
+### 破坏性变更
+- `baoyu-cover-image`：移除 `tech` 风格（技术内容改用 `blueprint` 或 `editorial-infographic` 风格）。
+
+### 文档
+- `README.md`、`README.zh.md`：更新 cover-image 和 slide-deck 风格预览截图。
+
 ## 1.3.0 - 2026-01-18
 
 ### 新功能
diff --git a/README.md b/README.md
index 3e37f32..0a7d84f 100644
--- a/README.md
+++ b/README.md
@@ -127,7 +127,26 @@ Generate hand-drawn style cover images for articles with multiple style options.
 /baoyu-cover-image path/to/article.md --no-title
 ```
 
-Available styles: `elegant` (default), `tech`, `warm`, `bold`, `minimal`, `playful`, `nature`, `retro`
+Available styles: `elegant` (default), `blueprint`, `bold`, `bold-editorial`, `chalkboard`, `dark-atmospheric`, `editorial-infographic`, `fantasy-animation`, `intuition-machine`, `minimal`, `nature`, `notion`, `pixel-art`, `playful`, `retro`, `sketch-notes`, `vector-illustration`, `vintage`, `warm`, `watercolor`
+
+**Style Previews**:
+
+| | | |
+|:---:|:---:|:---:|
+| ![elegant](./screenshots/cover-image-styles/elegant.webp) | ![blueprint](./screenshots/cover-image-styles/blueprint.webp) | ![bold](./screenshots/cover-image-styles/bold.webp) |
+| elegant | blueprint | bold |
+| ![bold-editorial](./screenshots/cover-image-styles/bold-editorial.webp) | ![chalkboard](./screenshots/cover-image-styles/chalkboard.webp) | ![dark-atmospheric](./screenshots/cover-image-styles/dark-atmospheric.webp) |
+| bold-editorial | chalkboard | dark-atmospheric |
+| ![editorial-infographic](./screenshots/cover-image-styles/editorial-infographic.webp) | ![fantasy-animation](./screenshots/cover-image-styles/fantasy-animation.webp) | ![intuition-machine](./screenshots/cover-image-styles/intuition-machine.webp) |
+| editorial-infographic | fantasy-animation | intuition-machine |
+| ![minimal](./screenshots/cover-image-styles/minimal.webp) | ![nature](./screenshots/cover-image-styles/nature.webp) | ![notion](./screenshots/cover-image-styles/notion.webp) |
+| minimal | nature | notion |
+| ![pixel-art](./screenshots/cover-image-styles/pixel-art.webp) | ![playful](./screenshots/cover-image-styles/playful.webp) | ![retro](./screenshots/cover-image-styles/retro.webp) |
+| pixel-art | playful | retro |
+| ![sketch-notes](./screenshots/cover-image-styles/sketch-notes.webp) | ![vector-illustration](./screenshots/cover-image-styles/vector-illustration.webp) | ![vintage](./screenshots/cover-image-styles/vintage.webp) |
+| sketch-notes | vector-illustration | vintage |
+| ![warm](./screenshots/cover-image-styles/warm.webp) | ![watercolor](./screenshots/cover-image-styles/watercolor.webp) | |
+| warm | watercolor | |
 
 #### baoyu-slide-deck
 
@@ -172,16 +191,18 @@ Generate professional slide deck images from content. Creates comprehensive outl
 
 | | | |
 |:---:|:---:|:---:|
-| ![blueprint](./screenshots/slide-deck-styles/blueprint.webp) | ![bold-editorial](./screenshots/slide-deck-styles/bold-editorial.webp) | ![corporate](./screenshots/slide-deck-styles/corporate.webp) |
-| blueprint | bold-editorial | corporate |
-| ![dark-atmospheric](./screenshots/slide-deck-styles/dark-atmospheric.webp) | ![editorial-infographic](./screenshots/slide-deck-styles/editorial-infographic.webp) | ![fantasy-animation](./screenshots/slide-deck-styles/fantasy-animation.webp) |
-| dark-atmospheric | editorial-infographic | fantasy-animation |
-| ![intuition-machine](./screenshots/slide-deck-styles/intuition-machine.webp) | ![minimal](./screenshots/slide-deck-styles/minimal.webp) | ![notion](./screenshots/slide-deck-styles/notion.webp) |
-| intuition-machine | minimal | notion |
-| ![pixel-art](./screenshots/slide-deck-styles/pixel-art.webp) | ![scientific](./screenshots/slide-deck-styles/scientific.webp) | ![sketch-notes](./screenshots/slide-deck-styles/sketch-notes.webp) |
-| pixel-art | scientific | sketch-notes |
-| ![vector-illustration](./screenshots/slide-deck-styles/vector-illustration.webp) | ![vintage](./screenshots/slide-deck-styles/vintage.webp) | ![watercolor](./screenshots/slide-deck-styles/watercolor.webp) |
-| vector-illustration | vintage | watercolor |
+| ![blueprint](./screenshots/slide-deck-styles/blueprint.webp) | ![chalkboard](./screenshots/slide-deck-styles/chalkboard.webp) | ![bold-editorial](./screenshots/slide-deck-styles/bold-editorial.webp) |
+| blueprint | chalkboard | bold-editorial |
+| ![corporate](./screenshots/slide-deck-styles/corporate.webp) | ![dark-atmospheric](./screenshots/slide-deck-styles/dark-atmospheric.webp) | ![editorial-infographic](./screenshots/slide-deck-styles/editorial-infographic.webp) |
+| corporate | dark-atmospheric | editorial-infographic |
+| ![fantasy-animation](./screenshots/slide-deck-styles/fantasy-animation.webp) | ![intuition-machine](./screenshots/slide-deck-styles/intuition-machine.webp) | ![minimal](./screenshots/slide-deck-styles/minimal.webp) |
+| fantasy-animation | intuition-machine | minimal |
+| ![notion](./screenshots/slide-deck-styles/notion.webp) | ![pixel-art](./screenshots/slide-deck-styles/pixel-art.webp) | ![scientific](./screenshots/slide-deck-styles/scientific.webp) |
+| notion | pixel-art | scientific |
+| ![sketch-notes](./screenshots/slide-deck-styles/sketch-notes.webp) | ![vector-illustration](./screenshots/slide-deck-styles/vector-illustration.webp) | ![vintage](./screenshots/slide-deck-styles/vintage.webp) |
+| sketch-notes | vector-illustration | vintage |
+| ![watercolor](./screenshots/slide-deck-styles/watercolor.webp) | | |
+| watercolor | | |
 
 After generation, slides are automatically merged into a `.pptx` file for easy sharing.
 
diff --git a/README.zh.md b/README.zh.md
index 8f6910a..7d33e54 100644
--- a/README.zh.md
+++ b/README.zh.md
@@ -127,7 +127,26 @@ npx add-skill jimliu/baoyu-skills
 /baoyu-cover-image path/to/article.md --no-title
 ```
 
-可用风格：`elegant`（默认）、`tech`、`warm`、`bold`、`minimal`、`playful`、`nature`、`retro`
+可用风格：`elegant`（默认）、`blueprint`、`bold`、`bold-editorial`、`chalkboard`、`dark-atmospheric`、`editorial-infographic`、`fantasy-animation`、`intuition-machine`、`minimal`、`nature`、`notion`、`pixel-art`、`playful`、`retro`、`sketch-notes`、`vector-illustration`、`vintage`、`warm`、`watercolor`
+
+**风格预览**：
+
+| | | |
+|:---:|:---:|:---:|
+| ![elegant](./screenshots/cover-image-styles/elegant.webp) | ![blueprint](./screenshots/cover-image-styles/blueprint.webp) | ![bold](./screenshots/cover-image-styles/bold.webp) |
+| elegant | blueprint | bold |
+| ![bold-editorial](./screenshots/cover-image-styles/bold-editorial.webp) | ![chalkboard](./screenshots/cover-image-styles/chalkboard.webp) | ![dark-atmospheric](./screenshots/cover-image-styles/dark-atmospheric.webp) |
+| bold-editorial | chalkboard | dark-atmospheric |
+| ![editorial-infographic](./screenshots/cover-image-styles/editorial-infographic.webp) | ![fantasy-animation](./screenshots/cover-image-styles/fantasy-animation.webp) | ![intuition-machine](./screenshots/cover-image-styles/intuition-machine.webp) |
+| editorial-infographic | fantasy-animation | intuition-machine |
+| ![minimal](./screenshots/cover-image-styles/minimal.webp) | ![nature](./screenshots/cover-image-styles/nature.webp) | ![notion](./screenshots/cover-image-styles/notion.webp) |
+| minimal | nature | notion |
+| ![pixel-art](./screenshots/cover-image-styles/pixel-art.webp) | ![playful](./screenshots/cover-image-styles/playful.webp) | ![retro](./screenshots/cover-image-styles/retro.webp) |
+| pixel-art | playful | retro |
+| ![sketch-notes](./screenshots/cover-image-styles/sketch-notes.webp) | ![vector-illustration](./screenshots/cover-image-styles/vector-illustration.webp) | ![vintage](./screenshots/cover-image-styles/vintage.webp) |
+| sketch-notes | vector-illustration | vintage |
+| ![warm](./screenshots/cover-image-styles/warm.webp) | ![watercolor](./screenshots/cover-image-styles/watercolor.webp) | |
+| warm | watercolor | |
 
 #### baoyu-slide-deck
 
@@ -172,16 +191,18 @@ npx add-skill jimliu/baoyu-skills
 
 | | | |
 |:---:|:---:|:---:|
-| ![blueprint](./screenshots/slide-deck-styles/blueprint.webp) | ![bold-editorial](./screenshots/slide-deck-styles/bold-editorial.webp) | ![corporate](./screenshots/slide-deck-styles/corporate.webp) |
-| blueprint | bold-editorial | corporate |
-| ![dark-atmospheric](./screenshots/slide-deck-styles/dark-atmospheric.webp) | ![editorial-infographic](./screenshots/slide-deck-styles/editorial-infographic.webp) | ![fantasy-animation](./screenshots/slide-deck-styles/fantasy-animation.webp) |
-| dark-atmospheric | editorial-infographic | fantasy-animation |
-| ![intuition-machine](./screenshots/slide-deck-styles/intuition-machine.webp) | ![minimal](./screenshots/slide-deck-styles/minimal.webp) | ![notion](./screenshots/slide-deck-styles/notion.webp) |
-| intuition-machine | minimal | notion |
-| ![pixel-art](./screenshots/slide-deck-styles/pixel-art.webp) | ![scientific](./screenshots/slide-deck-styles/scientific.webp) | ![sketch-notes](./screenshots/slide-deck-styles/sketch-notes.webp) |
-| pixel-art | scientific | sketch-notes |
-| ![vector-illustration](./screenshots/slide-deck-styles/vector-illustration.webp) | ![vintage](./screenshots/slide-deck-styles/vintage.webp) | ![watercolor](./screenshots/slide-deck-styles/watercolor.webp) |
-| vector-illustration | vintage | watercolor |
+| ![blueprint](./screenshots/slide-deck-styles/blueprint.webp) | ![chalkboard](./screenshots/slide-deck-styles/chalkboard.webp) | ![bold-editorial](./screenshots/slide-deck-styles/bold-editorial.webp) |
+| blueprint | chalkboard | bold-editorial |
+| ![corporate](./screenshots/slide-deck-styles/corporate.webp) | ![dark-atmospheric](./screenshots/slide-deck-styles/dark-atmospheric.webp) | ![editorial-infographic](./screenshots/slide-deck-styles/editorial-infographic.webp) |
+| corporate | dark-atmospheric | editorial-infographic |
+| ![fantasy-animation](./screenshots/slide-deck-styles/fantasy-animation.webp) | ![intuition-machine](./screenshots/slide-deck-styles/intuition-machine.webp) | ![minimal](./screenshots/slide-deck-styles/minimal.webp) |
+| fantasy-animation | intuition-machine | minimal |
+| ![notion](./screenshots/slide-deck-styles/notion.webp) | ![pixel-art](./screenshots/slide-deck-styles/pixel-art.webp) | ![scientific](./screenshots/slide-deck-styles/scientific.webp) |
+| notion | pixel-art | scientific |
+| ![sketch-notes](./screenshots/slide-deck-styles/sketch-notes.webp) | ![vector-illustration](./screenshots/slide-deck-styles/vector-illustration.webp) | ![vintage](./screenshots/slide-deck-styles/vintage.webp) |
+| sketch-notes | vector-illustration | vintage |
+| ![watercolor](./screenshots/slide-deck-styles/watercolor.webp) | | |
+| watercolor | | |
 
 生成完成后，所有幻灯片会自动合并为 `.pptx` 文件，方便分享。
 
diff --git a/screenshots/cover-image-styles/blueprint.webp b/screenshots/cover-image-styles/blueprint.webp
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diff --git a/screenshots/cover-image-styles/warm.webp b/screenshots/cover-image-styles/warm.webp
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diff --git a/screenshots/cover-image-styles/watercolor.webp b/screenshots/cover-image-styles/watercolor.webp
new file mode 100644
index 0000000..17fa473
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diff --git a/screenshots/slide-deck-styles/chalkboard.webp b/screenshots/slide-deck-styles/chalkboard.webp
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diff --git a/skills/baoyu-cover-image/SKILL.md b/skills/baoyu-cover-image/SKILL.md
index 3acf82d..09d8978 100644
--- a/skills/baoyu-cover-image/SKILL.md
+++ b/skills/baoyu-cover-image/SKILL.md
@@ -14,9 +14,9 @@ Generate hand-drawn style cover images for articles with multiple style options.
 /baoyu-cover-image path/to/article.md
 
 # Specify a style
-/baoyu-cover-image path/to/article.md --style tech
+/baoyu-cover-image path/to/article.md --style blueprint
 /baoyu-cover-image path/to/article.md --style warm
-/baoyu-cover-image path/to/article.md --style bold
+/baoyu-cover-image path/to/article.md --style dark-atmospheric
 
 # Without title text
 /baoyu-cover-image path/to/article.md --no-title
@@ -47,13 +47,25 @@ Generate hand-drawn style cover images for articles with multiple style options.
 | Style | Description |
 |-------|-------------|
 | `elegant` (Default) | Refined, sophisticated, understated |
-| `tech` | Modern, clean, futuristic |
-| `warm` | Friendly, approachable, human-centered |
+| `blueprint` | Technical schematics, engineering precision |
 | `bold` | High contrast, attention-grabbing, energetic |
+| `bold-editorial` | Magazine cover impact, dramatic typography |
+| `chalkboard` | Black chalkboard, colorful chalk drawings |
+| `dark-atmospheric` | Cinematic dark mode, glowing accents |
+| `editorial-infographic` | Magazine explainer, visual storytelling |
+| `fantasy-animation` | Ghibli/Disney inspired, whimsical charm |
+| `intuition-machine` | Technical briefing, bilingual labels |
 | `minimal` | Ultra-clean, zen-like, focused |
-| `playful` | Fun, creative, whimsical |
 | `nature` | Organic, calm, earthy |
-| `retro` | Vintage, nostalgic, classic |
+| `notion` | Clean SaaS dashboard, productivity styling |
+| `pixel-art` | Retro 8-bit, nostalgic gaming aesthetic |
+| `playful` | Fun, creative, whimsical |
+| `retro` | Halftone dots, vintage badges, classic |
+| `sketch-notes` | Hand-drawn, educational, warm |
+| `vector-illustration` | Flat vector, black outlines, retro colors |
+| `vintage` | Aged paper, historical, expedition style |
+| `warm` | Friendly, approachable, human-centered |
+| `watercolor` | Soft hand-painted, natural warmth |
 
 Detailed style definitions: `references/styles/<style>.md`
 
@@ -63,13 +75,25 @@ When no `--style` is specified, the system analyzes content to select the best s
 
 | Content Signals | Selected Style |
 |----------------|----------------|
-| AI, coding, tech, digital, algorithm | `tech` |
+| Architecture, system design, engineering | `blueprint` |
+| Product launch, keynote, marketing, brand | `bold-editorial` |
+| Education, classroom, tutorial, teaching | `chalkboard` |
+| Entertainment, creative, premium, cinematic | `dark-atmospheric` |
+| Technology explainer, science, research | `editorial-infographic` |
+| Storytelling, children, fantasy, magical | `fantasy-animation` |
+| Technical docs, academic, bilingual | `intuition-machine` |
 | Personal story, emotion, growth, life | `warm` |
 | Controversial, urgent, must-read, warning | `bold` |
 | Simple, zen, focus, essential | `minimal` |
-| Fun, easy, beginner, casual, tutorial | `playful` |
+| Fun, easy, beginner, casual | `playful` |
 | Nature, eco, wellness, health, organic | `nature` |
-| History, classic, vintage, old, traditional | `retro` |
+| Pop culture, 80s/90s nostalgia, badges | `retro` |
+| Product, SaaS, dashboard, productivity | `notion` |
+| Gaming, retro tech, developer, 8-bit | `pixel-art` |
+| Educational, tutorial, knowledge sharing | `sketch-notes` |
+| Creative proposals, brand, toy-like | `vector-illustration` |
+| History, exploration, heritage, biography | `vintage` |
+| Lifestyle, travel, food, personal | `watercolor` |
 | Business, professional, strategy, analysis | `elegant` |
 
 ## File Management
diff --git a/skills/baoyu-cover-image/references/styles/blueprint.md b/skills/baoyu-cover-image/references/styles/blueprint.md
new file mode 100644
index 0000000..6775fb2
--- /dev/null
+++ b/skills/baoyu-cover-image/references/styles/blueprint.md
@@ -0,0 +1,25 @@
+# blueprint
+
+Precise technical blueprint style with engineering aesthetic
+
+## Color Palette
+
+- Primary: Engineering Blue (#2563EB), Navy Blue (#1E3A5F)
+- Background: Blueprint Off-White (#FAF8F5), subtle grid overlay
+- Accents: Amber (#F59E0B), Light Blue (#BFDBFE)
+
+## Visual Elements
+
+- Precise lines with consistent stroke weights
+- Technical schematics and clean vector graphics
+- Dimension lines and measurement indicators
+- Grid alignment for all elements
+- Geometric precision for all shapes
+
+## Typography
+
+- Clean sans-serif hand lettering, technical and authoritative
+
+## Best For
+
+Technical architecture, system design, data analysis, engineering documentation
diff --git a/skills/baoyu-cover-image/references/styles/bold-editorial.md b/skills/baoyu-cover-image/references/styles/bold-editorial.md
new file mode 100644
index 0000000..6cf80a0
--- /dev/null
+++ b/skills/baoyu-cover-image/references/styles/bold-editorial.md
@@ -0,0 +1,26 @@
+# bold-editorial
+
+High-impact magazine editorial with bold visual expression
+
+## Color Palette
+
+- Primary: Pure White (#FFFFFF), Electric Blue (#3B82F6), Bright Orange (#FB923C)
+- Background: Deep Black (#0A0A0A), Deep Blue (#0F172A)
+- Accents: Magenta (#EC4899), Neon Green (#22C55E), Violet (#8B5CF6)
+
+## Visual Elements
+
+- Strong typography as visual element itself
+- Geometric shapes and bold color blocks
+- Full-bleed solid color backgrounds
+- Dynamic diagonal lines and angles
+- Dramatic lighting effects on text
+- Minimal decoration, maximum impact
+
+## Typography
+
+- Bold condensed typeface, oversized headlines, all-caps, tight letter-spacing
+
+## Best For
+
+Product launches, marketing, keynote speeches, brand showcases, investor pitches
diff --git a/skills/baoyu-cover-image/references/styles/chalkboard.md b/skills/baoyu-cover-image/references/styles/chalkboard.md
new file mode 100644
index 0000000..1dfe1b4
--- /dev/null
+++ b/skills/baoyu-cover-image/references/styles/chalkboard.md
@@ -0,0 +1,26 @@
+# chalkboard
+
+Black chalkboard background with colorful chalk drawing style
+
+## Color Palette
+
+- Primary: Chalk White (#F5F5F5), Chalk Yellow (#FFE566), Chalk Pink (#FF9999)
+- Background: Chalkboard Black (#1A1A1A), Dark Green-Black (#1C2B1C)
+- Accents: Chalk Blue (#66B3FF), Chalk Green (#90EE90), Chalk Orange (#FFB366)
+
+## Visual Elements
+
+- Chalkboard texture with subtle dust and smudges
+- Hand-drawn chalk illustrations with sketchy lines
+- Chalk dust effects around text and drawings
+- Imperfect lines with visible texture
+- Doodles, arrows, underlines, stars
+- Eraser marks and chalk residue
+
+## Typography
+
+- Hand-drawn chalk lettering, slightly uneven, with chalk texture
+
+## Best For
+
+Educational content, tutorials, classroom themes, back-to-school, teaching materials
diff --git a/skills/baoyu-cover-image/references/styles/dark-atmospheric.md b/skills/baoyu-cover-image/references/styles/dark-atmospheric.md
new file mode 100644
index 0000000..936896c
--- /dev/null
+++ b/skills/baoyu-cover-image/references/styles/dark-atmospheric.md
@@ -0,0 +1,25 @@
+# dark-atmospheric
+
+Dark moody aesthetic with glowing accent elements
+
+## Color Palette
+
+- Primary: Electric Purple (#8B5CF6), Cyan Blue (#06B6D4), Magenta Pink (#EC4899)
+- Background: Deep Purple-Black (#0D0D1A), Rich Navy (#1A1A2E)
+- Accents: Amber (#F59E0B), Pure White (#FFFFFF)
+
+## Visual Elements
+
+- Glowing accent elements and borders
+- Subtle gradient backgrounds
+- Atmospheric fog or particle effects
+- Neon-style highlights on key elements
+- Silhouettes with backlit edges
+
+## Typography
+
+- Elegant serif or refined sans-serif in light/white with subtle glow
+
+## Best For
+
+Entertainment, creative industries, premium brands, cinematic storytelling
diff --git a/skills/baoyu-cover-image/references/styles/editorial-infographic.md b/skills/baoyu-cover-image/references/styles/editorial-infographic.md
new file mode 100644
index 0000000..b436307
--- /dev/null
+++ b/skills/baoyu-cover-image/references/styles/editorial-infographic.md
@@ -0,0 +1,26 @@
+# editorial-infographic
+
+Modern magazine-style editorial with clear visual storytelling
+
+## Color Palette
+
+- Primary: Near Black (#1A1A1A), Editorial Blue (#2563EB)
+- Background: Pure White (#FFFFFF), Light Gray (#F8F9FA)
+- Accents: Coral (#F97316), Emerald (#10B981), Amber (#F59E0B)
+
+## Visual Elements
+
+- Clean flat illustrations (not photos)
+- Structured multi-section layouts
+- Callout boxes for key insights
+- Icon-based data visualization
+- Visual metaphors for abstract concepts
+- Pull quotes and highlight boxes
+
+## Typography
+
+- Bold display serif or modern sans-serif, editorial sophistication
+
+## Best For
+
+Technology explainers, science communication, research summaries, thought leadership
diff --git a/skills/baoyu-cover-image/references/styles/fantasy-animation.md b/skills/baoyu-cover-image/references/styles/fantasy-animation.md
new file mode 100644
index 0000000..d610525
--- /dev/null
+++ b/skills/baoyu-cover-image/references/styles/fantasy-animation.md
@@ -0,0 +1,25 @@
+# fantasy-animation
+
+Whimsical hand-drawn animation style inspired by Ghibli and Disney
+
+## Color Palette
+
+- Primary: Golden Yellow (#F4D03F), Rose Pink (#E8A0BF), Deep Forest (#2D5A3D)
+- Background: Soft Sky Blue (#E8F4FC), Warm Cream (#FFF8E7)
+- Accents: Sage Green (#87A96B), Sky Blue (#7EC8E3), Coral (#F08080)
+
+## Visual Elements
+
+- Central illustrated character (friendly, expressive)
+- Magical floating objects (books, orbs, sparkles)
+- Storybook-style environment backgrounds
+- Soft shadows and gentle highlights
+- Decorative elements: stars, sparkles, flowers, leaves
+
+## Typography
+
+- Whimsical serif or decorative hand-lettered style, organic feel
+
+## Best For
+
+Educational content, storytelling, creative workshops, fantasy/gaming content
diff --git a/skills/baoyu-cover-image/references/styles/intuition-machine.md b/skills/baoyu-cover-image/references/styles/intuition-machine.md
new file mode 100644
index 0000000..d036a43
--- /dev/null
+++ b/skills/baoyu-cover-image/references/styles/intuition-machine.md
@@ -0,0 +1,26 @@
+# intuition-machine
+
+Technical briefing style with aged paper and bilingual labels
+
+## Color Palette
+
+- Primary: Dark Maroon (#5D3A3A), Teal (#2F7373)
+- Background: Aged Cream (#F5F0E6), subtle paper texture with light creases
+- Accents: Warm Brown (#8B7355), Maroon (#722F37), Deep Charcoal (#2D2D2D)
+
+## Visual Elements
+
+- Isometric 3D technical illustrations or flat 2D diagrams
+- Bilingual callout labels (English + Chinese)
+- Faded thematic background patterns
+- Clean black outlines on all elements
+- Split or triptych layouts
+- Key quote box at bottom
+
+## Typography
+
+- Bold display font in dark maroon, ALL CAPS for titles, bilingual labels
+
+## Best For
+
+Technical explanations, academic presentations, bilingual audiences, knowledge docs
diff --git a/skills/baoyu-cover-image/references/styles/notion.md b/skills/baoyu-cover-image/references/styles/notion.md
new file mode 100644
index 0000000..d3d0c03
--- /dev/null
+++ b/skills/baoyu-cover-image/references/styles/notion.md
@@ -0,0 +1,25 @@
+# notion
+
+Clean SaaS dashboard aesthetic with productivity tool styling
+
+## Color Palette
+
+- Primary: Near Black (#1F1F1F), Notion Blue (#2383E2)
+- Background: Light Gray (#F7F7F5), Pure White (#FFFFFF)
+- Accents: Success Green (#0F7B6C), Alert Red (#E03E3E), Warning Yellow (#DFAB01)
+
+## Visual Elements
+
+- Card-based layouts with subtle borders
+- Clean data visualizations
+- Tag and label chips
+- Icon-based navigation hints
+- Progress bars and metric displays
+
+## Typography
+
+- System UI or Inter style, clean and functional
+
+## Best For
+
+Product demos, SaaS presentations, productivity content, B2B topics
diff --git a/skills/baoyu-cover-image/references/styles/pixel-art.md b/skills/baoyu-cover-image/references/styles/pixel-art.md
new file mode 100644
index 0000000..72fc21a
--- /dev/null
+++ b/skills/baoyu-cover-image/references/styles/pixel-art.md
@@ -0,0 +1,26 @@
+# pixel-art
+
+Retro 8-bit pixel art aesthetic with nostalgic gaming style
+
+## Color Palette
+
+- Primary: Dark Navy (#1A1A2E), Pixel Green (#00FF00)
+- Background: Light Blue (#87CEEB), Soft Lavender (#E6E6FA)
+- Accents: Pixel Red (#FF0000), Pixel Yellow (#FFFF00), Pixel Cyan (#00FFFF)
+
+## Visual Elements
+
+- All elements with visible pixel structure
+- Simple iconography: stars, hearts, arrows
+- Text bubbles with pixel borders
+- Progress bars with chunky segments
+- Dithering patterns for gradients
+- Limited 16-32 color palette
+
+## Typography
+
+- Pixelated bitmap font style, chunky blocky letterforms
+
+## Best For
+
+Gaming content, tech tutorials, developer talks, retro-themed topics
diff --git a/skills/baoyu-cover-image/references/styles/sketch-notes.md b/skills/baoyu-cover-image/references/styles/sketch-notes.md
new file mode 100644
index 0000000..7f6b241
--- /dev/null
+++ b/skills/baoyu-cover-image/references/styles/sketch-notes.md
@@ -0,0 +1,25 @@
+# sketch-notes
+
+Soft hand-drawn illustration style with fresh minimalist aesthetic
+
+## Color Palette
+
+- Primary: Deep Charcoal (#2C3E50), Soft Orange (#F4A261)
+- Background: Warm Off-White (#FAF8F0), subtle paper grain
+- Accents: Mustard Yellow (#E9C46A), Sage Green (#87A96B), Light Blue (#7EC8E3)
+
+## Visual Elements
+
+- Connection lines with hand-drawn wavy feel
+- Conceptual abstract icons illustrating ideas
+- Color fills with hand-painted casual feel
+- Doodle-style decorative elements
+- Arrows and pointers with sketchy style
+
+## Typography
+
+- Bold hand-written marker font for headlines, casual handwriting for body
+
+## Best For
+
+Educational content, knowledge sharing, technical explanations, tutorials
diff --git a/skills/baoyu-cover-image/references/styles/tech.md b/skills/baoyu-cover-image/references/styles/tech.md
deleted file mode 100644
index c423a58..0000000
--- a/skills/baoyu-cover-image/references/styles/tech.md
+++ /dev/null
@@ -1,23 +0,0 @@
-# tech
-
-Modern, clean, futuristic
-
-## Color Palette
-
-- Primary: Deep blue (#1A365D), electric cyan (#00D4FF), purple (#6B46C1)
-- Background: Dark gray (#1A202C), near-black (#0D1117)
-- Accents: Neon green (#00FF88), bright white
-
-## Visual Elements
-
-- Circuit patterns, data nodes
-- Geometric grids, code snippets
-- Glowing effects
-
-## Typography
-
-- Monospace-style hand lettering, glowing effects
-
-## Best For
-
-AI, programming, technology, digital transformation
diff --git a/skills/baoyu-cover-image/references/styles/vector-illustration.md b/skills/baoyu-cover-image/references/styles/vector-illustration.md
new file mode 100644
index 0000000..81a8bb1
--- /dev/null
+++ b/skills/baoyu-cover-image/references/styles/vector-illustration.md
@@ -0,0 +1,25 @@
+# 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
diff --git a/skills/baoyu-cover-image/references/styles/vintage.md b/skills/baoyu-cover-image/references/styles/vintage.md
new file mode 100644
index 0000000..7872001
--- /dev/null
+++ b/skills/baoyu-cover-image/references/styles/vintage.md
@@ -0,0 +1,26 @@
+# vintage
+
+Vintage aged-paper aesthetic with historical document styling
+
+## Color Palette
+
+- Primary: Dark Brown (#3D2914), Forest Green (#2D5A3D), Navy Blue (#1E3A5F)
+- Background: Aged Parchment (#F5E6D3), Sepia Cream (#FFF8DC)
+- Accents: Burgundy (#722F37), Gold (#C9A227), Sepia Black (#3D3D3D)
+
+## Visual Elements
+
+- Antique maps with route lines and landmarks
+- Compass roses and nautical elements
+- Specimen drawings (flora, fauna)
+- Handwritten-style annotations
+- Rope, leather, brass decorative motifs
+- Aged texture with subtle creases
+
+## Typography
+
+- Classic serif with historical character, elegant flourishes
+
+## Best For
+
+Historical content, travel, heritage storytelling, biography, scientific discovery
diff --git a/skills/baoyu-cover-image/references/styles/watercolor.md b/skills/baoyu-cover-image/references/styles/watercolor.md
new file mode 100644
index 0000000..8a4f1ef
--- /dev/null
+++ b/skills/baoyu-cover-image/references/styles/watercolor.md
@@ -0,0 +1,25 @@
+# watercolor
+
+Soft watercolor illustration style with hand-painted textures
+
+## Color Palette
+
+- Primary: Soft Coral (#F4A261), Dusty Rose (#E8A0A0)
+- Background: Warm Off-White (#FAF8F0), Soft Cream (#FFF9E6)
+- Accents: Sage Green (#87A96B), Sky Blue (#7EC8E3), Soft Lavender (#C5B4E3)
+
+## Visual Elements
+
+- Watercolor washes as backgrounds
+- Visible brush strokes and textures
+- Natural elements: leaves, flowers, organic shapes
+- Color bleeds and soft edges
+- Hand-drawn arrows and connections
+
+## Typography
+
+- Elegant handwritten or brush script, organic letterforms
+
+## Best For
+
+Lifestyle content, wellness, travel guides, personal stories, creative topics
diff --git a/skills/baoyu-slide-deck/SKILL.md b/skills/baoyu-slide-deck/SKILL.md
index 1e3ff95..9e6296d 100644
--- a/skills/baoyu-slide-deck/SKILL.md
+++ b/skills/baoyu-slide-deck/SKILL.md
@@ -49,6 +49,7 @@ Transform content into professional slide deck images with flexible style option
 | Style | Description | Best For |
 |-------|-------------|----------|
 | `blueprint` (Default) | Technical schematics, grid texture | Architecture, system design |
+| `chalkboard` | Black chalkboard, colorful chalk | Education, tutorials, classroom |
 | `notion` | SaaS dashboard, card-based layouts | Product demos, SaaS, B2B |
 | `bold-editorial` | Magazine cover, bold typography, dark | Product launches, keynotes |
 | `corporate` | Navy/gold, structured layouts | Investor decks, proposals |
@@ -69,6 +70,7 @@ Transform content into professional slide deck images with flexible style option
 | Content Signals | Selected Style |
 |-----------------|----------------|
 | tutorial, learn, education, guide, intro, beginner | `sketch-notes` |
+| classroom, teaching, school, chalkboard, blackboard | `chalkboard` |
 | architecture, system, data, analysis, technical | `blueprint` |
 | creative, children, kids, cute, illustration | `vector-illustration` |
 | briefing, academic, research, bilingual, infographic, concept | `intuition-machine` |
diff --git a/skills/baoyu-slide-deck/references/styles/chalkboard.md b/skills/baoyu-slide-deck/references/styles/chalkboard.md
new file mode 100644
index 0000000..723707e
--- /dev/null
+++ b/skills/baoyu-slide-deck/references/styles/chalkboard.md
@@ -0,0 +1,68 @@
+# chalkboard
+
+Black chalkboard background with colorful chalk drawing style
+
+## Design Aesthetic
+
+Classic classroom chalkboard aesthetic with hand-drawn chalk illustrations. Nostalgic educational feel with imperfect, sketchy lines that capture the warmth of traditional teaching. Colorful chalk creates visual hierarchy while maintaining the authentic chalkboard experience.
+
+## Background
+
+- Color: Chalkboard Black (#1A1A1A) or Dark Green-Black (#1C2B1C)
+- Texture: Realistic chalkboard texture with subtle scratches, dust particles, and faint eraser marks
+
+## Typography
+
+### Primary Font (Headlines)
+
+Hand-drawn chalk lettering style. Bold, slightly uneven strokes with visible chalk texture. Imperfect baseline adds authenticity. White or bright colored chalk for emphasis.
+
+### Secondary Font (Body)
+
+Neater chalk handwriting for readability. Consistent sizing with natural variation. Light chalk texture, thinner strokes than headlines.
+
+## Color Palette
+
+| Role | Color | Hex | Usage |
+|------|-------|-----|-------|
+| Background | Chalkboard Black | #1A1A1A | Primary background |
+| Alt Background | Green-Black | #1C2B1C | Traditional green board |
+| Primary Text | Chalk White | #F5F5F5 | Main text, outlines |
+| Accent 1 | Chalk Yellow | #FFE566 | Highlights, emphasis |
+| Accent 2 | Chalk Pink | #FF9999 | Secondary highlights |
+| Accent 3 | Chalk Blue | #66B3FF | Diagrams, links |
+| Accent 4 | Chalk Green | #90EE90 | Success, nature |
+| Accent 5 | Chalk Orange | #FFB366 | Warnings, energy |
+
+## Visual Elements
+
+- Hand-drawn chalk illustrations with sketchy, imperfect lines
+- Chalk dust effects around text and key elements
+- Doodles: stars, arrows, underlines, circles, checkmarks
+- Mathematical formulas and simple diagrams
+- Eraser smudges and chalk residue textures
+- Wooden frame border optional
+- Stick figures and simple icons
+- Connection lines with hand-drawn feel
+
+## Style Rules
+
+### Do
+
+- Maintain authentic chalk texture on all elements
+- Use imperfect, hand-drawn quality throughout
+- Add subtle chalk dust and smudge effects
+- Create visual hierarchy with color variety
+- Include playful doodles and annotations
+
+### Don't
+
+- Use perfect geometric shapes
+- Create clean digital-looking lines
+- Add photorealistic elements
+- Use gradients or glossy effects
+- Add slide numbers, footers, or logos
+
+## Best For
+
+Educational presentations, classroom content, tutorials, teaching materials, back-to-school themes, workshop presentations, informal learning sessions, knowledge sharing