Fair Value Measurement - Assets and liabilities measured at fair value on a recurring basis (Details) - CNY (¥) ¥ in Thousands |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Assets | ||
| Debt investments accounted for at fair value | ¥ 17,521 | |
| Recurring | ||
| Assets | ||
| Short-term investments | 840,938 | ¥ 538,816 |
| Debt investments accounted for at fair value | 17,521 | |
| Recurring | Level 2 | ||
| Assets | ||
| Short-term investments | 840,938 | ¥ 538,816 |
| Recurring | Level 3 | ||
| Assets | ||
| Debt investments accounted for at fair value | ¥ 17,521 |