v3.26.1
SHARE-BASED COMPENSATION - Restricted shares (Details) - CNY (¥)
¥ / shares in Units, ¥ in Thousands
1 Months Ended 12 Months Ended
May 31, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Weighted Average Grant Date Fair Value        
Vesting period (in years) 3 years      
Share-based compensation expense   ¥ 378,374 ¥ 167,613 ¥ 185,604
Restricted Shares        
Number of Restricted Shares Units        
Outstanding at beginning   5,138,656    
Granted   422,932    
Vested   (620,910)    
Forfeited   (152,452)    
Converted   (3,906,464)    
Outstanding at ending   881,762 5,138,656  
Weighted Average Grant Date Fair Value        
Outstanding at beginning   ¥ 99.97    
Granted   98.18 ¥ 109.26 ¥ 51.43
Converted   109.75    
Forfeited   80.34    
Vested   77.66    
Outstanding at ending   ¥ 74.9 ¥ 99.97  
Total fair value of the shares vested   ¥ 48,222 ¥ 36,277 ¥ 60,376
Share-based compensation expense   165,781 ¥ 89,082 ¥ 61,622
Unrecognized compensation cost   ¥ 34,697    
Weighted-average period   10 months 13 days    
Restricted Shares | Employee        
Number of Restricted Shares Units        
Granted   422,932 3,224,370  
Restricted Shares | Share Based Compensation Award Tranche One        
Number of Restricted Shares Units        
Granted     1,034,064  
Minimum | Restricted Shares        
Weighted Average Grant Date Fair Value        
Vesting period (in years)   2 years    
Maximum | Restricted Shares        
Weighted Average Grant Date Fair Value        
Vesting period (in years)   4 years