Pan–Qi² — ẋ=a(y−x)+0.1 yz, ẏ=35 x−y−xz, ż=xy−3z+0.2 y. Classic a=10. +0.1yz+0.2y fold. Distinct from pan-qi.html / qi-li.html. RK4. Gold trail, cap 650. RM = settled silhouette, no animate-on.