# HTML Shell
The bundled renderer uses one shared document shell and swaps theme-specific CSS/layout behavior per preset.
## Shared Structure
```html
Name - 简历
```
## Theme Differences
- `classic`: centered header, blue ruled section titles, right metadata column.
- `modern`: left header, thick blue bar before section titles, left metadata rail.
- `sb2nov`: centered serif header, black rules, italic metadata.
- `engineeringclassic`: left header, lighter blue engineering styling, right metadata column.
- `engineeringresumes`: centered serif header, dense compact spacing, black rules.
## Guidance
- Keep the HTML single-file and self-contained.
- Preserve A4 print fidelity first; screen view is secondary.
- When showing previews, use the exact same renderer path as final export so previews and final output do not drift.