Dark Geometry and the Standard Model: From E=mc² to Neutrino Masses – A Unified Geometric FrameworkWe demonstrate that Dark Geometry provides a unified framework connecting Einstein's E=mc² to the Standard Model of particle physics through a single geometric principle: the dimension d=3 of space. Starting from the Hertault Axiom—the identification of the conformal mode with the information saturation ratio—we show that:The speed of light emerges from cosmological closure: c = (2GM_univ H_0)^{1/d}, with the exponent 1/d = 1/3 determined by spatial dimension.Einstein's relation E = mc² becomes E = m × (2GM_univ H_0)^β where β = (d-1)/d = 2/3 is the holographic exponent.The fundamental constants c, G, ℏ are derived quantities, not free parameters.Neutrino mass ratios follow the Fibonacci pattern Δm²₂₁/Δm²₃₁ = 1/F₉ = 1/34, where 9 = d² encodes the dimension of flavor-mass space.The Dark Boson couples universally to all particles through the conformal metric, providing the geometric origin of mass.The framework unifies cosmology (dark energy/matter ratio Ω_Λ/Ω_m = 2), relativity (E=mc²), and particle physics (neutrino masses) through the single parameter d=3. All predictions match observations to within 4–10%, with zero free parameters. Keywords: Dark Geometry, E=mc², Standard Model, neutrino masses, Fibonacci sequence, holographic principle, fundamental constants, Dark Boson, Hertault Axiom