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 | ||
| Equity securities with readily determinable fair values | ¥ 14,894 | ¥ 140,985 |
| Recurring | ||
| Assets | ||
| Short-term investments | 6,164,061 | 6,082,161 |
| Equity securities with readily determinable fair values | 14,894 | 140,985 |
| Total assets | 6,178,955 | 6,223,146 |
| Recurring | Level 1 | ||
| Assets | ||
| Equity securities with readily determinable fair values | 14,894 | 140,985 |
| Total assets | 14,894 | 140,985 |
| Recurring | Level 2 | ||
| Assets | ||
| Short-term investments | 6,164,061 | 6,082,161 |
| Total assets | ¥ 6,164,061 | ¥ 6,082,161 |