.concept-hero{position:relative;padding:110px 0 40px;overflow:hidden}
.concept-hero .orbit{position:absolute;top:-120px;right:-120px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle at 40% 40%,rgba(57,182,255,.18),transparent 60%);filter:blur(10px);pointer-events:none}
.concept-hero .orbit2{position:absolute;bottom:-160px;left:-100px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,rgba(94,224,192,.12),transparent 60%);pointer-events:none}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
/* pipeline */
.pipe{position:relative;margin:30px 0 10px}
.pipe .track{position:absolute;left:0;right:0;top:64px;height:2px;background:linear-gradient(90deg,var(--accent),var(--accent2));opacity:.35}
.pipe .track .pulse{position:absolute;top:-3px;left:0;width:60px;height:8px;border-radius:8px;background:var(--accent);
  filter:blur(4px);animation:flow 3.2s linear infinite}
@keyframes flow{0%{left:-8%}100%{left:100%}}
.steps4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative;z-index:1}
.s4{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:24px;transition:transform .3s ease,opacity .3s ease,border-color .25s ease,box-shadow .25s ease;position:relative}
.s4:hover{transform:translateY(-6px);border-color:var(--accent);box-shadow:0 16px 40px rgba(0,0,0,.4)}
.steps4:hover .s4{transform:scale(.82);opacity:.42}
.steps4:hover .s4:hover{transform:scale(1.28) translateY(-8px);opacity:1;box-shadow:0 28px 65px rgba(0,0,0,.55);z-index:2}
.s4 .dot{width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:17px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#03121b;margin-bottom:16px}
.s4.hl{border-color:var(--green)}
.s4.hl .dot{background:linear-gradient(135deg,var(--green),#7ff0a8)}
.s4 .lbl{color:var(--accent);font-size:11px;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;margin-bottom:8px}
.s4.hl .lbl{color:var(--green)}
.s4 h4{margin:0 0 10px;font-size:16px;line-height:1.35}
.s4 p{margin:0;color:var(--muted);font-size:13px}
.s4 .meta{margin-top:14px;padding-top:12px;border-top:1px solid var(--line);color:var(--dim);font-size:12px}
/* narrative rows */
.nrow{display:grid;grid-template-columns:56px 1fr;gap:20px;padding:26px 0;border-bottom:1px solid var(--line);align-items:start}
.nrow .big{font-size:30px;font-weight:800;color:var(--accent);line-height:1}
.nrow h3{margin:0 0 8px;font-size:20px}
.nrow p{margin:0;color:var(--muted);max-width:640px}
/* compare */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:10px}
.col{border:1px solid var(--line);border-radius:16px;padding:26px;background:var(--panel)}
.col.old{opacity:.85}
.col.new{border-color:var(--green);background:linear-gradient(160deg,rgba(63,208,122,.06),var(--panel))}
.col h4{margin:0 0 14px;font-size:14px;letter-spacing:1.2px;text-transform:uppercase;color:var(--dim)}
.col.new h4{color:var(--green)}
.col ul{margin:0;padding:0;list-style:none}
.col li{padding:9px 0 9px 26px;position:relative;color:var(--muted);font-size:14.5px;border-bottom:1px solid rgba(255,255,255,.04)}
.col li:before{content:"×";position:absolute;left:0;color:#e06b6b;font-weight:700}
.col.new li:before{content:"✓";color:var(--green)}
@media(max-width:900px){.steps4{grid-template-columns:1fr 1fr}.pipe .track{display:none}.compare{grid-template-columns:1fr}}
@media(max-width:560px){.steps4{grid-template-columns:1fr}}