Dual-Target CSPG4/GD2 CAR-NK Cells for Advanced Melanoma

Inclusion Criteria: * Age 18-75 years at consent. * Histologically confirmed unresectable/metastatic cutaneous melanoma or metastatic uveal melanoma. * Disease progression after standard therapy, intolerance to standard therapy, or no remaining standard option expected to provide meaningful benefit. For cutaneous melanoma: prior anti-PD-1/L1 (with or without antiCTLA-4) unless contraindicated; if BRAF V600-mutant, prior BRAF/MEK inhibitor therapy or documented unsuitability. For uveal melanoma: prior tebentafusp if HLA-A\*02:01-positive and eligible, or documented unsuitability/unavailability plus at least one prior systemic therapy. * Tumor demonstrates CSPG4 and/or GD2 expression in archival or fresh tissue by central testing (suggested positivity threshold: at least 25% viable tumor cells by IHC or equivalent validated assay). * At least 1 measurable lesion by RECIST v1.1. * ECOG performance status 0-1. * Adequate bone marrow, renal, hepatic, cardiac, and pulmonary function per protocol. * Life expectancy of at least 12 weeks. * Treated, stable brain metastases are allowed if neurologically stable for at least 4 weeks and not requiring escalating corticosteroids. * Willingness to use effective contraception and comply with protocol-required visits, blood sampling, and requested biopsies. Exclusion Criteria: * Active symptomatic CNS metastases, leptomeningeal disease, or uncontrolled seizure disorder. * Prior allogeneic stem cell transplant or solid organ transplant; prior gene-modified cellular therapy within 12 weeks; or anti-cancer therapy too close to lymphodepletion per protocol washout rules. * Requirement for systemic immunosuppression greater than 10 mg prednisone equivalent/day or uncontrolled autoimmune/inflammatory disease requiring systemic treatment. * Active uncontrolled infection, including uncontrolled HIV, HBV, or HCV, or fever/sepsis at the time lymphodepletion would begin. * Clinically significant cardiovascular disease, uncontrolled arrhythmia, recent myocardial infarction, or uncontrolled thromboembolic disease. * Grade 2 or higher unresolved toxicities from prior therapy, except stable endocrinopathy, alopecia, or vitiligo. * Pregnancy or breastfeeding. * Any condition that, in the investigator's judgment, would make lymphodepletion or CAR-NK infusion unsafe.