  We present a recent development towards a unified description of quark-hadron
matter in the QCD phase diagram that is based on a cluster decomposition of the
generalized Beth-Uhlenbeck approach to quark matter, selfconsistently coupled
to Polyakov-loop and mesonic background fields. The Mott dissociation of
hadrons under extreme conditions of temperature and density is triggered by
chiral symmetry restoration and confining aspects are modeled by the coupling
to the background mean fields. First results for the QCD phase diagram with the
capability to describe critical endpoints as well as crossover-all-over are
presented and an excellent agreement with lattice QCD on the temperature axis
is obtained.
