Panel a): position–velocity (PV) cut of C¹⁷O(3–2) perpendicular to the jet. First contour at 5σ (0.30 K) and steps of 20σ. Dashed lines mark V_sys = + 1.3 km s^-1 and the continuum peak MM1. Panelb): zoom-in of the C¹⁷O(3–2) PV plot. Panelc): blue- and redshifted C¹⁷O(3–2) emission in the LV range (±0.6–1.5 km s^-1 from V_sys), tracing the rotating outflow cavity. The tilted black cross indicates the SiO jet direction (PA = 22°) and the equatorial plane. First contour at 5σ (15 mJy beam^-1 km s^-1), then steps of 7σ. Panel d): same as panel c) for the HV velocity range (±1.9–3.5 km s^-1 from systemic), tracing the rotating inner disk. Note the smaller spatial scale in panels b) and d).