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Taxation - Schedule of Movement of valuation allowance (Detail) - CNY (¥) ¥ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Income Tax Disclosure [Abstract] |  |  |
Balance at beginning of the year | ¥ (521,462) | ¥ (476,022) | ¥ (325,200)
Changes of valuation allowance | 64,884 | (45,440) | (150,822)
Balance at end of the year | ¥ (456,578) | ¥ (521,462) | ¥ (476,022)

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- Definition Amount of increase (decrease) in valuation and qualifying accounts and reserves from adjustment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-4 + Details
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