v3.26.1
Document And Entity Information - shares
 6 Months Ended
Jun. 30, 2026
Aug. 11, 2026
Document Information Line Items    
Entity Central Index Key 0002064177  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2026  
Document Fiscal Year Focus 2026  
Document Transition Report false  
Entity File Number 001-42947  
Entity Registrant Name Blueport Acquisition Ltd  
Entity Incorporation, State or Country Code E9  
Entity Tax Identification Number 00-0000000  
Entity Address, Address Line One 366 Madison Ave 3rd Floor  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10017  
City Area Code 203  
Local Phone Number 489-2110  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company true  
Amendment Flag false  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --12-31  
Class A ordinary shares    
Document Information Line Items    
Title of 12(b) Security Class A Ordinary Shares, par value of $0.0001 per share  
Trading Symbol BPAC  
Security Exchange Name NASDAQ  
Entity Common Stock, Shares Outstanding   5,947,250
Class A Ordinary Share Rights    
Document Information Line Items    
Title of 12(b) Security Rights, each entitling the holder to receive one-sixth (1/6) of one Class A Ordinary Share  
Trading Symbol BPACR  
Security Exchange Name NASDAQ  
Class A Ordinary Share Units    
Document Information Line Items    
Title of 12(b) Security Units, each consisting of one Class A Ordinary Share and one Right to receive one-sixth (1/6) of one Class A Ordinary Share  
Trading Symbol BPACU  
Security Exchange Name NASDAQ  
Class B ordinary shares    
Document Information Line Items    
Entity Common Stock, Shares Outstanding   1,437,500