  We formulate a light-front spectator model for the proton that incorporates
the presence of light sea quarks. In this particular model, the sea quarks are
seen as active partons, whereas the remaining components of the proton are
treated as spectators. The proposed model relies on the formulation of the
light-front wave function constructed by the soft wall AdS/QCD. The model wave
functions are parameterized by fitting the unpolarized parton distribution
functions of light sea quarks from the CTEQ18 global analysis. We then employ
the light-front wave functions to obtain the sea quarks generalized parton
distribution functions, transverse momentum dependent parton distributions, and
their asymmetries, which are accessible in the upcoming Electron-Ion-Colliders.
We investigate sea quarks' spin and orbital angular momentum contributions to
the proton spin.
