Principal Accounting Policies - Property, Equipment and Software (Details) |
Dec. 31, 2025 |
|---|---|
| Leasehold improvements | |
| Property, Equipment and Software | |
| Property, Plant, and Equipment, Useful Life, Term, Description [Extensible Enumeration] | us-gaap:UsefulLifeShorterOfTermOfLeaseOrAssetUtilityMember |
| Computers and electronic equipment | |
| Property, Equipment and Software | |
| Property, equipment and software useful life | 3 years |
| Office equipment | |
| Property, Equipment and Software | |
| Property, equipment and software useful life | 3 years |
| Software | |
| Property, Equipment and Software | |
| Property, equipment and software useful life | 3 years |