Landing Page Builder

Philosophy

This skill produces landing pages that are visually audacious — not the typical nested-container, card-grid, predictable web template. Every output should feel like a deliberate design artifact:

• 布局大胆 — Clip-path dividers instead of horizontal lines. Type bleeding off-screen. Elements breaking out of their grid. Full-viewport headlines.
• SVG 作为设计核心 — Not decorative sprinkles. SVG paths animate on scroll, icons have personality, background textures from <feTurbulence> noise.
• 层次感与深度 — GSAP ScrollTrigger creates genuine spatial depth: sections that overlap and cover the previous one, sticky panels pinned while content slides over them, parallax on separate z-layers.
• 背景质感 — Every section has texture. Never a flat solid background.
• 导航惊喜 — The nav is never a standard horizontal bar.

Bundled Assets (USE THESE — do not reinvent)

This skill comes with pre-built assets. Read and use them directly:

The quality guarantee of this skill comes from using these assets. They encode specific design decisions that make outputs distinct. Don't describe what to do — copy the code and adapt it.

The Workflow

Step 1: Understand the Product

Use AskUserQuestion to ask:

"告诉我你的落地页是关于什么的——产品/服务名称，以及一句话介绍。"

Wait for the answer before proceeding.

Step 2: Generate the Style Preview

Fill in the two placeholders and open the result — do NOT read the template file into context:

• PRODUCT_NAME → the product name from Step 1
• PRODUCT_HEADLINE → a short punchy phrase (3–5 words) that captures the product's essence

_SKILL_DIR=$(ls -d ~/.agents/skills/citycraft 2>/dev/null || ls -d ~/.claude/skills/citycraft 2>/dev/null)
PYTHON=$(command -v python3 2>/dev/null || command -v python 2>/dev/null || echo "")
if [ -n "$PYTHON" ]; then
  # Python available (macOS / Linux / WSL / Windows with Python)
  # Pass LANG=en for English-language conversations
  "$PYTHON" "$_SKILL_DIR/assets/scripts/run_preview.py" \
    --template "$_SKILL_DIR/assets/style-preview-template.html" \
    --output   ./style-preview.html \
    --port     17433 \
    --timeout  300 \
    "LANG=zh" \
    "PRODUCT_NAME=ACTUAL_PRODUCT_NAME" \
    "PRODUCT_HEADLINE=ACTUAL_HEADLINE" \
    "RECEIVER_PORT=17433"
else
  # No Python — substitute via sed and open as a local file.
  # The submit button falls back to clipboard copy automatically.
  sed "s/__PRODUCT_NAME__/ACTUAL_PRODUCT_NAME/g; s/__PRODUCT_HEADLINE__/ACTUAL_HEADLINE/g" \
    "$_SKILL_DIR/assets/style-preview-template.html" > ./style-preview.html
  open ./style-preview.html 2>/dev/null || xdg-open ./style-preview.html 2>/dev/null \
    || echo "Open in browser: $(pwd)/style-preview.html"
  echo "Python not found — no live bridge. The submit button will copy the city name to clipboard. Paste it here."
fi

Replace ACTUAL_PRODUCT_NAME and ACTUAL_HEADLINE with the real values from Step 1 in the script arguments.

Windows PowerShell (no WSL/Git Bash): Run run_preview.ps1 directly — it has the same interface. See assets/scripts/run_preview.ps1 for usage.

Tell the user: "我在浏览器里打开了57种城市风格的预览卡片，每个都是真实渲染效果。向下滚动可以看到全部——从京都到拉各斯到棕榈泉，再到伊斯坦布尔、迈阿密、成都、哥本哈根、维也纳、开普敦、波哥大、阿姆斯特丹、贝鲁特、波特兰，以及上海、北京、重庆、西安、杭州、深圳夜、敦煌、苏州、拉萨、罗马、布拉格、墨尔本、雅典、卡萨布兰卡、釜山、巴厘岛、多伦多、特拉维夫、华沙、孟买夜，还有新加入的大阪、清迈、米兰、台北、新奥尔良、苏黎世、温哥华。选好之后直接点卡片发送给我；如果本地桥接没有连上，也可以复制城市名告诉我。如果57个城市都不对，直接用自己的语言描述给我也行。"

Step 3: Open the Interactive Options Preview

The user has chosen their city. Now open the visual options preview so they can feel the layout and nav choices instead of reading descriptions.

If the user clicked "让 AI 来选" (city = __AI_CHOOSE__): Skip the preview entirely. Instead, look back at the conversation to understand the product's audience, industry, and tone. Then pick the single most fitting city from references/city-styles.md and briefly explain why (2–3 sentences). Confirm with the user: "我为你选了 [城市]——[理由]. 继续吗？" Then proceed to Step 3 with that city.

3a — Get city color tokens (script, not file read)

Run get_city_tokens.py to extract just the 5 color values — do NOT read city-styles.md into context:

_SKILL_DIR=$(ls -d ~/.agents/skills/citycraft 2>/dev/null || ls -d ~/.claude/skills/citycraft 2>/dev/null)
PYTHON=$(command -v python3 2>/dev/null || command -v python 2>/dev/null || echo "")
# Outputs CITY_BG=, CITY_SURFACE=, CITY_INK=, CITY_MUTED=, CITY_ACCENT=
eval $("$PYTHON" "$_SKILL_DIR/assets/scripts/get_city_tokens.py" "ACTUAL_CITY_NAME")

Replace ACTUAL_CITY_NAME with the city name the user chose (Chinese or English). The script handles both. If the city isn't found, it exits 1 — in that case fall back to reading the ### Colors section of references/city-styles.md manually.

3b — Generate and open options-preview.html

Use the $CITY_* variables from 3a. Do NOT read the template file into context:

if [ -n "$PYTHON" ]; then
  # Pass LANG=en for English-language conversations
  "$PYTHON" "$_SKILL_DIR/assets/scripts/run_preview.py" \
    --template "$_SKILL_DIR/assets/options-preview-template.html" \
    --output   ./options-preview.html \
    --port     17432 \
    --timeout  300 \
    "LANG=zh" \
    "PRODUCT_NAME=ACTUAL_PRODUCT_NAME" \
    "PRODUCT_HEADLINE=ACTUAL_HEADLINE" \
    "CITY_NAME=ACTUAL_CITY_NAME" \
    "CITY_BG=$CITY_BG" \
    "CITY_SURFACE=$CITY_SURFACE" \
    "CITY_INK=$CITY_INK" \
    "CITY_MUTED=$CITY_MUTED" \
    "CITY_ACCENT=$CITY_ACCENT" \
    "CITY_DARK_BG=#0e0c09" \
    "CITY_DARK_SURFACE=#1e1b16" \
    "CITY_DARK_INK=#f2ede4" \
    "CITY_DARK_ACCENT=$CITY_ACCENT" \
    "CITY_BRIGHT_BG=#fdf9f2" \
    "CITY_BRIGHT_SURFACE=#fffdf8" \
    "CITY_BRIGHT_INK=#1a1510" \
    "CITY_BRIGHT_ACCENT=$CITY_ACCENT" \
    "RECEIVER_PORT=17432"
else
  sed \
    -e "s/__PRODUCT_NAME__/ACTUAL_PRODUCT_NAME/g" \
    -e "s/__PRODUCT_HEADLINE__/ACTUAL_HEADLINE/g" \
    -e "s/__CITY_NAME__/ACTUAL_CITY_NAME/g" \
    -e "s/__CITY_BG__/$CITY_BG/g" \
    -e "s/__CITY_SURFACE__/$CITY_SURFACE/g" \
    -e "s/__CITY_INK__/$CITY_INK/g" \
    -e "s/__CITY_MUTED__/$CITY_MUTED/g" \
    -e "s/__CITY_ACCENT__/$CITY_ACCENT/g" \
    -e "s/__CITY_DARK_BG__/#0e0c09/g" \
    -e "s/__CITY_DARK_SURFACE__/#1e1b16/g" \
    -e "s/__CITY_DARK_INK__/#f2ede4/g" \
    -e "s/__CITY_DARK_ACCENT__/$CITY_ACCENT/g" \
    -e "s/__CITY_BRIGHT_BG__/#fdf9f2/g" \
    -e "s/__CITY_BRIGHT_SURFACE__/#fffdf8/g" \
    -e "s/__CITY_BRIGHT_INK__/#1a1510/g" \
    -e "s/__CITY_BRIGHT_ACCENT__/$CITY_ACCENT/g" \
    "$_SKILL_DIR/assets/options-preview-template.html" > ./options-preview.html
  open ./options-preview.html 2>/dev/null || xdg-open ./options-preview.html 2>/dev/null \
    || echo "Open in browser: $(pwd)/options-preview.html"
  echo "Python not found — no live bridge. Use the copy button in the preview and paste the result here."
fi

The dark variant (__CITY_DARK_*) is always the luxury/night treatment — near-black bg, warm light text, same accent. The bright variant is always the fresh/modern treatment — near-white bg, dark text, same accent. The city's identity comes from the base colors and accent, not from the dark/bright shell.

Windows PowerShell (no WSL/Git Bash): Run run_preview.ps1 directly. See assets/scripts/run_preview.ps1 for usage.

When the script exits, it prints the result JSON to stdout. If it times out, ask the user to type their choice manually before proceeding.

Tell the user: "在浏览器里打开了一个互动选择页——有排版、导航的实际演示效果，还有三种色调的对比。可以点击全屏菜单看它怎么爆开，把光标移近底部胶囊感受磁性效果。全部选好之后，点底部的「告诉 Agent →」按钮，我会自动收到结果并继续生成；如果本地桥接没有连上，再把复制结果贴给我就可以。"

If the user chose a non-city description (scene, era, material, emotion): read references/imagery-derivation.md to derive the design token system first, use those derived colors as the CITY_* arg values above, then proceed normally.

If the script prints JSON, parse it directly and continue to Step 4 with city, layout, nav, tone, hero, features, and sections. If it times out, ask the user to paste their choices manually before proceeding.

Step 4: Generate the Landing Page

Output into {product-name}-landing/:

{product-name}-landing/
├── index.html
├── style.css
├── main.js
└── assets/
    └── icons.svg

4a — Bash Assembly (do this first, before writing any file)

The goal is to avoid outputting bundled asset code as model tokens. Instead, use Bash to copy and pipe the ready-made assets into the output files. Only product-specific content (copy, tokens, overrides) is written by the model.

Step 1 — Set up directories

_SKILL_DIR=$(ls -d ~/.agents/skills/citycraft 2>/dev/null || ls -d ~/.claude/skills/citycraft 2>/dev/null)
_OUT="./{product-name}-landing"
mkdir -p "$_OUT/assets"

Step 2 — Assemble section variants into a staging file

Plan which variants to use (see table below), then pipe each into a staging file:

# Replace B / C / PRICING with the user's actual choices
python3 "$_SKILL_DIR/assets/scripts/extract_variant.py" \
  "$_SKILL_DIR/assets/sections/hero-variants.html" B > "$_OUT/_sections.html"
python3 "$_SKILL_DIR/assets/scripts/extract_variant.py" \
  "$_SKILL_DIR/assets/sections/features-variants.html" C >> "$_OUT/_sections.html"
python3 "$_SKILL_DIR/assets/scripts/extract_variant.py" \
  "$_SKILL_DIR/assets/sections/conversion-variants.html" PRICING >> "$_OUT/_sections.html"
python3 "$_SKILL_DIR/assets/scripts/extract_variant.py" \
  "$_SKILL_DIR/assets/sections/conversion-variants.html" CTA >> "$_OUT/_sections.html"

For conversion sections use names: PRICING, COMPARE_PRICING, TESTIMONIALS, BRAND_WALL, CTA, FAQ_A, FAQ_B.

Step 3 — Copy bundled CSS utilities into style.css base

# Texture: use --texture flag (never read full city-styles.md)
python3 "$_SKILL_DIR/assets/scripts/get_city_tokens.py" "CITY_NAME" --texture > "$_OUT/_texture.css"
# Clip-paths: copy all classes, model picks which to apply via class names
cat "$_SKILL_DIR/assets/clip-paths.css" >> "$_OUT/_texture.css"

Step 4 — Copy GSAP snippets into main.js base

cat "$_SKILL_DIR/assets/gsap-snippets.js" > "$_OUT/_gsap-base.js"

Now read the three staging files (_sections.html, _texture.css, _gsap-base.js) to understand what's available, then write the final output files.

4b — Section Variant Reference

Common page sequences:

• SaaS tool: Hero D → Features C → Features A → Pricing → FAQ A → CTA
• Agency portfolio: Hero A → Features B → Testimonials → CTA
• Developer tool: Hero B → Features C → Features A → Pricing → FAQ B → CTA
• Luxury product: Hero C → Features B → Testimonials → CTA

4c — Write the Output Files

index.html — Write with the Write tool. No markdown block, directly to file.

• Document structure: <html>, <head> (Google Fonts, GSAP CDN, link to style.css + main.js), <body>
• Nav HTML matching the selected nav style
• Paste <style> blocks and <section> HTML from _sections.html in page order
• Replace all placeholder copy with real product copy — fit the city aesthetic's tone of voice
• No Lorem Ipsum, no placeholder text

<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/3.12.5/gsap.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/3.12.5/ScrollTrigger.min.js"></script>

style.css — Write with the Write tool. Structure:

1. :root block — full design token system: colors from $CITY_* tokens, chosen fonts, spacing scale, radii. This is the only part the model writes from scratch.
2. Paste texture + clip-path CSS from _texture.css
3. Nav CSS matching the selected nav style (from references/nav-catalog.md)
4. Layout and typography overrides — only what differs from section defaults

clamp() for ALL headline font sizes:

• Hero 主标题：clamp(2.8rem, 7vw, 7rem) — 铺张型也不超过 7rem
• Section 标题：clamp(2rem, 4vw, 4rem)
• 大数字/装饰数字：clamp(4rem, 10vw, 9rem)
• 副标题/说明文字：clamp(1rem, 1.4vw, 1.2rem)

Do NOT add comments to style.css — they consume tokens and add no value to the output file.

main.js — Write with the Write tool. Structure:

1. gsap.registerPlugin(ScrollTrigger)
2. Paste the relevant functions from _gsap-base.js — required minimum:
   • initHeroEntrance() — stagger hero elements in
   • initParallax() — at least 2 layers at different speeds
   • Section heading reveals on viewport entry
   • initStickySteps() OR initBlastMenu() OR initMagneticPill() — matching nav/layout
3. Call sequence at bottom; ScrollTrigger.refresh() after fonts load

Do NOT add comments to main.js.

assets/icons.svg — SVG sprite with <symbol> elements. At minimum: logo mark, nav toggle, arrow, checkmark, 2–3 product-relevant feature icons. Icon style must match the city aesthetic's stroke weight and geometry.

After all files are written, delete the staging files:

rm -f "$_OUT/_sections.html" "$_OUT/_texture.css" "$_OUT/_gsap-base.js"

Design Laws (Never Break These)

1. No #ffffff backgrounds. Not on sections, not on cards. Warm neutrals: #f5ede0. Cool: #edf0ee. Dark: #08060f. Cards get a slight tint, never pure white.
2. No #6366f1. Color comes from the city style palette.
3. Section transitions must vary. Use classes from assets/clip-paths.css. Pick at least 3 different transition types across the page — mix from: diagonal (clip-diagonal-*, clip-parallelogram), curved (clip-round-bottom, clip-scallop, clip-arc-bottom), gradient dissolve (section-dissolve), and flat rule (section-rule). Never use the same type for every section boundary.
4. No generic icons. Match the city style's stroke weight and geometry.
5. Two typefaces minimum. Display/serif for headlines + clean sans for body. From references/city-styles.md. Decorative/script accent fonts (when a city style mentions one) go on watermarks, pull quotes, or ornamental elements — never on buttons, nav, or body copy.
6. Nav must surprise. Use the chosen nav from references/nav-catalog.md with its full surprise element implemented.
7. Use bundled assets. The texture, GSAP snippets, and clip-paths must come from the skill's asset files — not reimplemented from scratch.
8. .line-wrap CJK fix. Whenever the page has Chinese or Japanese text and uses .line-wrap { overflow: hidden } for line reveal animations, add padding-top: 0.15em; margin-top: -0.15em; to prevent CJK ascenders from being clipped at the top.

Reference Files

• references/city-styles.md — Exact design parameters (fonts, colors, textures, motion, icons) for each city aesthetic
• references/nav-catalog.md — 4 nav styles with full implementation notes and GSAP code
• references/imagery-derivation.md — How to translate any non-city description (scene, era, material, emotion) into a concrete design token system. Read this whenever the user describes something that isn't one of the 57 city cards.
• references/product-demo-hero.md — When and how to build a time-driven product workflow demo in the Hero (Variant D). Includes scene design guide, 3-act structure, onEnter() callback patterns, and product-type → scene mapping table. Read this whenever the user wants to show their product's process in the hero.