# 404 Not Found: /static/css/style.css

- **ID:** `python/flask-static-file-404`
- **Domain:** python
- **Category:** config_error
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

静态文件不存在或 Flask 的静态文件夹路径配置错误。

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 3.x | active | — | — |

## Workarounds

1. **** (95% success)
   ```
   创建 static/css/style.css 并引用 url_for('static', filename='css/style.css')
   ```
2. **** (90% success)
   ```
   app = Flask(__name__, static_folder='assets')
   ```

## Dead Ends

- **** — 路径不匹配。 (80% fail)
- **** — 需要正确引用相对路径。 (60% fail)