Radii: r_spirit=0.12L; r_silos=0.33L; r_cycle=0.36L; ouro=0.47–0.50L; node_r=0.035L.
Angles: θ_k=k·60°; chevrons at θ_k+30°; tangent=a+90°; optional animation offsets mid-angles.
Semantics: Center (Spirit), six nodes (Silos), ring (adaptive loop), outer donut + head (Ecology/feedback).