Summary of significant accounting policies - Intangible assets, net (Details) |
12 Months Ended |
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Dec. 31, 2025 | |
| Software copyright | |
| Intangible assets, net | |
| Estimated economic useful lives | 6 years |
| Customer relationship | |
| Intangible assets, net | |
| Estimated economic useful lives | 7 years |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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