Anishchenko–Astakhov (1980s) — dx/dt = m·x + y − x·z, dy/dt = −x, dz/dt = −g·z + g·I(x)·x² with I(x)=1 if x>0 else 0. Classic m=1.2 g=0.2. Dual m+g sliders. Distinct from vallis.html, sakarya.html, pehlivan.html, tigan.html. Bulk centroid ≈ (−0.0044, 0.2464, 1.1574). RK4 Anishchenko fold. Gold low-alpha trail, cap 650. RM = settled silhouette, no animate-on.