Yes, you can apply for the CSS (Central Superior Services) exams in Pakistan even if you are married. Marital status does not disqualify candidates from participating in the CSS exams.
The Federal Public Service Commission (FPSC), which conducts the CSS exams, does not impose any restrictions based on marital status. Both single and married individuals are eligible to apply for the exams, provided they meet the other eligibility criteria specified by the FPSC.