A 42-year-old man with HIV/AIDS (CD4 count: 80 cells/μL) presents with progressive headaches, low-grade fever, and fatigue over the past two weeks. He denies neck stiffness or photophobia. A non-contrast cranial CT scan is unremarkable. A lumbar puncture is performed, and India ink staining of the cerebrospinal fluid (CSF) reveals yeast cells with a surrounding clear halo. Which of the following is the first-line induction therapy for this patient?