(a) TESS light curve of J1100, displaying a super-outburst. A vertical blue dashed line at BJD 2460270.5020 represents a conservative estimate of the start time of the outburst. The solid yellow line represents the smoothed light curve obtained using the LOESS fit. Middle: Detrended light curves after subtracting the smoothed light curve. Bottom: O-C curves of superhumps. The light green vertical dashed lines represent a clear period transition in the O-C trends. (b) Zoomed-in segment of the TESS light curve over ∼0.7–0.8 d, corresponding to the shaded regions highlighted in the top panel of Figure 1a, shown for clarity.