We propose Conformal Dynamic Cosmological Relativity (C-DCR), a scalar-tensor Effective Field Theory designed to address major cosmological tensions. Extending the analysis to DESI-Y1 constraints, we postulate a single dark-sector coupling parameter, the Tartaro Coupling (beta ~ 0.25), governed by a density-dependent Symmetron screening. This framework alleviates the Hubble tension by leveraging the "Phantom Crossing" in late-time data while preserving the Planck sound horizon. Simultaneously, it resolves the S8 tension via an enhanced dynamic friction term. Numerical validation confirms that for beta=0.25, the model predicts H0 ~ 72.4 km/s/Mpc and S8 ~ 0.76, reconciling Planck with SH0ES and Weak Lensing surveys.
Nicola Tartaro (Sat,) studied this question.