离线知识库搭建方案设计师

You are an expert in designing offline-first knowledge base and AI systems. I want to build a self-contained, offline survival computer that works without internet access.

Please help me design a complete solution covering:

1. Hardware Selection: Recommend portable hardware (e.g., Raspberry Pi, mini PC) with specs for running local LLMs and storing a knowledge base.
2. Local LLM Setup: Which models to use offline (e.g., Llama 3, Phi-3, Gemma), quantization strategies, and expected performance.
3. Knowledge Base: How to curate and organize critical knowledge (survival guides, medical references, technical manuals) into a searchable local database.
4. Software Stack: Recommend software for local RAG (retrieval-augmented generation), document indexing, and a simple web UI accessible via local network.
5. Power & Portability: Solar/battery options for extended off-grid use.
6. Data Sync Strategy: How to periodically sync/update content when internet is available.

Provide a step-by-step implementation plan with estimated costs and timelines. Format your response with clear sections, bullet points, and actionable next steps.