v3.26.1
Share-based payments - Non-vested shares (Details)
¥ / shares in Units, ¥ in Thousands
12 Months Ended
Dec. 31, 2025
CNY (¥)
¥ / shares
shares
Dec. 31, 2025
CNY (¥)
$ / shares
Dec. 31, 2024
CNY (¥)
¥ / shares
shares
Dec. 31, 2024
CNY (¥)
$ / shares
Dec. 31, 2023
CNY (¥)
¥ / shares
shares
Dec. 31, 2023
$ / shares
Share-based Payments            
Share-based compensation expenses | ¥ ¥ 1,731,063   ¥ 1,537,740   ¥ 1,509,806  
Key management            
Share-based Payments            
Forfeiture rate (as a percent) 0.00%   0.00%   0.00%  
Employees            
Share-based Payments            
Forfeiture rate (as a percent) 28.00%   29.00%   23.00%  
Share-based compensation expenses | ¥ ¥ 302,334   ¥ 298,650   ¥ 283,630  
Non-vested shares            
Share-based Payments            
Non-vested ordinary shares granted to executive officers, employees, members of audit committee and consultants (in shares) 1,546,550   1,794,730   2,894,700  
Vesting period (in years) 4 years          
Aggregate fair value of the restricted shares at grant dates | ¥ ¥ 878,900   ¥ 1,083,690   ¥ 1,549,568  
Unrecognized compensation cost related to non-vested shares | ¥ ¥ 1,431,304 ¥ 1,431,304 ¥ 1,541,967 ¥ 1,541,967    
Weighted-average vesting period over which unrecognized compensation cost is to be recognized 2 years 5 months 4 days   2 years 6 months 18 days      
Weighted average granted fair value per share of non-vested shares granted during the year (in dollars per share) | (per share) ¥ 568.3 ¥ 79.52 ¥ 603.82 ¥ 83.87 ¥ 535.31 $ 76.49
Non-vested shares movement            
Outstanding at the beginning of the period 3,723,979          
Granted 1,546,550   1,794,730   2,894,700  
Vested (1,541,405)          
Forfeited (541,222)          
Outstanding at the end of the period 3,187,902   3,723,979      
Non-vested shares | First anniversary from grant date            
Share-based Payments            
Vesting percentage 25.00%          
Non-vested shares | Over a three-year period ending on the fourth anniversary of the grant date            
Share-based Payments            
Vesting percentage 75.00%          
Non-vested shares | Key management            
Share-based Payments            
Forfeiture rate (as a percent) 0.00%   0.00%   0.00%  
Non-vested shares | Employees            
Share-based Payments            
Forfeiture rate (as a percent) 28.00%   29.00%   23.00%  
Share-based compensation expenses | ¥ ¥ 768,010   ¥ 879,035   ¥ 784,981