Create minimalist single-page cippe.ai landing in Tailwind

[weitzu-com]

Motivation

• Replace an oversized 3D demo page with a single clean, minimal landing page that strictly follows the 5-section structure and content constraints.
• Deliver a responsive, high-end minimalist design using Tailwind CDN with dark slate background and emerald accent per the spec.

Description

• Rebuilt index.html as a single-file Tailwind CDN page with five ordered sections: fixed top nav, Hero (with CIPPE Origin AI title and subtitle), three pain-point cards, three package cards with a single bottom CTA, and booth info plus a simulated chat demo.
• Enforced global visual rules including bg-slate-950, emerald-500 accents, strict minimal copy lengths, and a maximum of two buttons (立即体验AI and 查看套装).
• Removed the large Three.js demo, associated scripts, and heavy assets to produce a compact, whitespace-forward layout and simplified markup.
• Included PWA-friendly hinting via theme-color and an in-page note 支持PWA一键安装 while avoiding broken sw.js/manifest references.

Testing

• Ran a Python content check python3 - <<'PY' ... PY that asserts required strings and that the page contains exactly two <button> elements, and it passed successfully.
• Started a local preview with python3 -m http.server 4173 --directory /workspace/project and used Playwright to visit http://127.0.0.1:4173/index.html and capture a full-page screenshot, which completed successfully.
• Attempted xmllint --html --noout which failed because xmllint is not available in the environment.
• Attempted a BeautifulSoup check that failed due to missing bs4 dependency in the environment.

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Codex Task