.mechanism-section{padding:clamp(80px,12vh,140px) var(--pad-x);background:linear-gradient(180deg,var(--black) 0%,var(--black-2) 50%,var(--black) 100%);border-top:1px solid var(--line);border-bottom:1px solid var(--line);position:relative;overflow:hidden}.mechanism-inner{max-width:var(--container);margin:0 auto;position:relative}.mechanism-header{text-align:center;margin-bottom:64px}.mechanism-header .section-label{margin-bottom:16px;display:inline-flex}.mechanism-intro{color:var(--paper);max-width:480px;margin:16px auto 0;font-size:15px;line-height:1.6}.mechanism-engine{opacity:0;justify-content:center;align-items:center;margin-bottom:48px;transition:opacity .6s,transform .6s;display:flex;position:relative;transform:scale(.5)}.mechanism-section.active .mechanism-engine{opacity:1;transform:scale(1)}.mechanism-engine-ring{border:2px solid var(--purple);opacity:0;border-radius:50%;width:80px;height:80px;position:absolute}.mechanism-section.active .mechanism-engine-ring{animation:2s ease-out .5s infinite enginePulse}@keyframes enginePulse{0%{opacity:.6;transform:scale(.8)}to{opacity:0;transform:scale(2)}}.mechanism-engine-logo{width:56px;height:56px;filter:drop-shadow(0 0 20px var(--purple-glow));z-index:1;border-radius:14px;position:relative}.mechanism-flow{justify-content:space-between;align-items:stretch;gap:0;display:flex;position:relative}.flow-node{text-align:center;opacity:.3;flex-direction:column;flex:none;align-items:center;gap:12px;width:180px;transition:opacity .6s,transform .6s;display:flex;transform:translateY(20px)}.mechanism-section.active .flow-node{opacity:1;transform:translateY(0)}.mechanism-section.active .flow-node[data-node="1"]{transition-delay:.3s}.mechanism-section.active .flow-node[data-node="2"]{transition-delay:.6s}.mechanism-section.active .flow-node[data-node="3"]{transition-delay:.9s}.mechanism-section.active .flow-node[data-node="4"]{transition-delay:1.2s}.flow-node-num{color:var(--purple);letter-spacing:.1em;font-family:JetBrains Mono,monospace;font-size:11px}.flow-node-circle{background:var(--black-2);border:1px solid var(--line);width:64px;height:64px;color:var(--paper);border-radius:50%;justify-content:center;align-items:center;transition:all .4s;display:flex;position:relative}.mechanism-section.active .flow-node[data-node="1"] .flow-node-circle,.mechanism-section.active .flow-node[data-node="2"] .flow-node-circle,.mechanism-section.active .flow-node[data-node="3"] .flow-node-circle{border-color:var(--purple);box-shadow:0 0 24px var(--purple-glow);color:var(--purple)}.mechanism-section.active .flow-node[data-node="4"] .flow-node-circle{border-color:var(--purple);box-shadow:0 0 32px var(--purple-glow),0 0 60px #8b5cf61a;color:var(--purple);animation:2s 1.5s infinite nodePulse}@keyframes nodePulse{0%,to{box-shadow:0 0 24px var(--purple-glow)}50%{box-shadow:0 0 40px var(--purple-glow),0 0 80px #8b5cf626}}.flow-node-title{color:var(--white);letter-spacing:-.01em;font-family:Fraunces,serif;font-size:18px;font-weight:500}.flow-node-desc{color:var(--paper-2);max-width:160px;font-size:12px;line-height:1.5}.flow-path{flex:1;align-items:center;min-width:60px;height:64px;display:flex;position:relative}.flow-line{background:linear-gradient(90deg,transparent,var(--purple) 20%,var(--purple) 80%,transparent);opacity:.3;transform-origin:0;height:1px;transition:transform .8s;position:absolute;top:50%;left:0;right:0;transform:scaleX(0)}.mechanism-section.active .flow-line{opacity:.5;transition-delay:.4s;transform:scaleX(1)}.flow-particle{background:var(--purple);width:6px;height:6px;box-shadow:0 0 8px var(--purple),0 0 16px var(--purple-glow);opacity:0;border-radius:50%;position:absolute;top:50%;left:0;transform:translateY(-50%)scale(0)}.mechanism-section.active .flow-particle{animation:2.5s linear infinite particleFlow}@keyframes particleFlow{0%{opacity:0;left:0;transform:translateY(-50%)scale(0)}10%{opacity:1;transform:translateY(-50%)scale(1)}85%{opacity:1;transform:translateY(-50%)scale(1)}to{opacity:0;left:100%;transform:translateY(-50%)scale(.5)}}.mechanism-growth{opacity:0;justify-content:center;align-items:center;gap:8px;margin-top:48px;transition:opacity .6s;display:flex}.mechanism-section.active .mechanism-growth{opacity:1;transition-delay:1.5s}.mechanism-growth-arrow{color:var(--purple);font-size:20px;animation:1.5s infinite growthBounce}@keyframes growthBounce{0%,to{transform:translateY(0)}50%{transform:translateY(-6px)}}.mechanism-growth-text{color:var(--paper);letter-spacing:.05em;text-transform:uppercase;font-size:13px;font-weight:500}@media (width<=840px){.mechanism-flow{flex-direction:column;gap:0}.flow-node{text-align:left;flex-direction:row;align-items:center;gap:16px;width:100%;padding:16px 0}.flow-node-circle{flex-shrink:0;width:48px;height:48px}.flow-node-num{position:absolute;left:0}.flow-node-title{font-size:16px}.flow-node-desc{max-width:none;font-size:11px}.flow-path{align-self:flex-start;width:2px;min-width:0;height:40px;margin-left:32px}.flow-line{background:linear-gradient(180deg,transparent,var(--purple) 20%,var(--purple) 80%,transparent);transform-origin:top;width:1px;height:100%;inset:0 auto 0 50%;transform:scaleY(0)}.mechanism-section.active .flow-line{transform:scaleY(1)}.flow-particle{top:0;left:50%;transform:translate(-50%)scale(0)}.mechanism-section.active .flow-particle{animation:2.5s linear infinite particleFlowMobile}@keyframes particleFlowMobile{0%{opacity:0;top:0;transform:translate(-50%)scale(0)}10%{opacity:1;transform:translate(-50%)scale(1)}85%{opacity:1;transform:translate(-50%)scale(1)}to{opacity:0;top:100%;transform:translate(-50%)scale(.5)}}.mechanism-engine{margin-bottom:32px}.flow-node[data-node="4"]{padding-bottom:0}}@media (width<=600px){.flow-node-circle{width:40px;height:40px}.flow-node-circle svg{width:22px;height:22px}.flow-path{height:32px;margin-left:24px}.flow-node{padding:12px 0}}