Inventory - Additional Information (Detail) - CNY (¥) ¥ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Inventory [Line Items] | |||
| Inventory write-downs | ¥ 555,368 | ¥ 943,734 | ¥ 1,054,711 |
| Raw Materials [Member] | |||
| Inventory [Line Items] | |||
| Inventory write-downs | ¥ 105,107 | ¥ 35,000 | ¥ 77,310 |