Panel a: Stellar mass as a function of distance to the cluster centers. The symbols are as defined in Fig. 4. The completeness limits of star-forming galaxies and quiescent galaxies are also shown as references. Panel b: Starburstiness (R_SB) of massive galaxies (M_⋆ > 3 × 10¹⁰ M_⊙) as a function of the distance to the cluster center. The dashed line shows the field main sequence and the shaded region shows the uncertainty.