  Let X be a normal projective Q-Gorenstein variety with at worst log-terminal
singularities. We prove a formula expressing the total stringy Chern class of a
generic complete intersection in X via the total stringy Chern class of X. This
formula is motivated by its applications to mirror symmetry for Calabi-Yau
complete intersections in toric varieties. We compute stringy Chern classes and
give a combinatorial interpretation of the stringy Libgober-Wood identity for
arbitrary projective Q-Gorenstein toric varieties. As an application we derive
a new combinatorial identity relating d-dimensional reflexive polytopes to the
number 12 in dimension d>3.
