Pham no-equilibrium — dx/dt = y, dy/dt = z, dz/dt = −b·y + 3y² − x² − x·z + a. Classic a=−0.05 b=1 (no eq when a<0; Wei/Wang–Chen fold studied by Pham et al.). Dual a+b sliders. Distinct from jafari.html, malasoma.html, shimizu-morioka.html, anishchenko.html, vallis.html, sakarya.html, pehlivan.html. Bulk centroid ≈ (1.1827, −0.0014, −0.0029). RK4 Pham fold. Gold low-alpha trail, cap 650. RM = settled silhouette, no animate-on.