docs: Update Implementation Details documentation

- Expand core processing flow documentation for BabelDOC translation
- Add detailed stages of PDF translation process
- Include comprehensive technical overview of translation workflow
- Link to specific implementation details and source code references

docs/ImplementationDetails/index.md

@@ -0,0 +1,81 @@
+# Implementation Details
+
+```{note}
+This documentation may contain AI-generated content. While we strive for accuracy, there might be inaccuracies. Please report any issues via:
+
+- [GitHub Issues](https://github.com/funstory-ai/BabelDOC/issues)
+- Community contribution (PRs welcome!)
+```
+
+## Core Processing Flow
+
+The BabelDOC translation process consists of several key stages, executed in the following order:
+
+1. **PDF Parsing and IL Creation**
+   - Extract text content while preserving character-level information
+   - Maintain font and style information
+   - Create structured intermediate layer (IL) representation
+
+2. **Layout OCR**
+   - Process document layout information
+   - Handle page boundaries and figure elements
+   - Manage coordinate systems
+
+3. **Paragraph Recognition**
+   - Group characters into meaningful paragraphs
+   - Handle special cases like table of contents
+   - Maintain layout information for typesetting
+
+4. **Style and Formula Processing**
+   - Identify and preserve mathematical formulas
+   - Detect and maintain text styles
+   - Handle special cases like subscripts/superscripts
+
+5. **IL Translation**
+   - Translate text while preserving document structure
+   - Maintain formulas and special formatting
+   - Support concurrent translation
+
+6. **Typesetting**
+   - Fit components within original paragraph bounds
+   - Handle mixed language text spacing
+   - Support first line indentation
+
+7. **Font Mapping**
+   - Map font identifiers
+   - Handle font encoding
+   - Manage font resources
+
+8. **PDF Generation**
+   - Create new PDF with translated content
+   - Preserve original formatting and styles
+   - Support both monolingual and dual-language output
+
+## Technical Details
+
+For detailed implementation information about each stage, please refer to:
+
+```{toctree}
+:maxdepth: 1
+
+PDFParsing/PDFParsing
+ParagraphFinding/ParagraphFinding
+StylesAndFormulas/StylesAndFormulas
+ILTranslator/ILTranslator
+Typesetting/Typesetting
+PDFCreation/PDFCreation
+AsyncTranslate/AsyncTranslate
+```
+
+```{note}
+Some implementation details are available directly in the source code:
+
+- [Layout OCR](https://github.com/funstory-ai/BabelDOC/blob/main/babeldoc/document_il/midend/layout_parser.py)
+- [Font Mapping](https://github.com/funstory-ai/BabelDOC/blob/main/babeldoc/document_il/utils/fontmap.py)
+```
+
+## API Reference
+
+For information about using the asynchronous translation API, see:
+
+- [Async Translation API](AsyncTranslate/AsyncTranslate.md)

docs/index.md

@@ -2,6 +2,7 @@
 ---
 end-before: <!-- github-only -->
 ---
+```
 
 ```{toctree}
 ---
@@ -19,9 +20,9 @@ caption: Development
 maxdepth: 1
 ---
 
-contributing
+CONTRIBUTING
 CONTRIBUTOR_REWARD
-Code of Conduct <codeofconduct>
-License <license>
+Code of Conduct <CODE_OF_CONDUCT>
+License <../LICENSE>
 Changelog <https://github.com/funstory-ai/BabelDOC/releases>
 ```