/* ═══ SOCIAL · SECTION 3 — THE ADVANTAGE (split, with the four-step chain) ═══ */
.adv{position:relative;background:#080808;border-top:1px solid var(--border);
  padding:clamp(74px,12vh,150px) var(--gut)}
.adv-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);
  gap:clamp(26px,5vw,80px);align-items:center}
@media(max-width:900px){.adv-grid{grid-template-columns:1fr;gap:30px}}
.adv h2{margin-top:20px;font-size:clamp(1.6rem,4.2vw,3.3rem);line-height:1;max-width:14ch}
.adv .lede{margin-top:24px;font-size:clamp(1rem,1.3vw,1.24rem);line-height:1.5;
  font-weight:600;letter-spacing:-.012em;max-width:36ch}
.adv p.body{margin-top:18px;font-size:clamp(.94rem,1.06vw,1.06rem);line-height:1.66;
  color:var(--muted);max-width:44ch}
.adv .link{margin-top:26px;display:inline-flex;align-items:center;gap:11px;
  font-size:11px;letter-spacing:.16em;font-weight:700;color:var(--cut)}
.adv .link i{width:26px;height:1px;background:var(--cut);display:block;position:relative;
  transition:width .4s cubic-bezier(.2,.7,.2,1)}
.adv .link:hover i{width:44px}
.adv .link i::after{content:"";position:absolute;right:0;top:0;width:8px;height:1px;
  background:var(--cut);transform-origin:right center;transform:rotate(-45deg)}

.chain{display:flex;flex-direction:column;gap:2px}
.ch{position:relative;overflow:hidden;padding:clamp(18px,2.6vh,26px) clamp(16px,2vw,26px);
  background:var(--surface);
  opacity:0;transform:translateX(-14px);
  transition:opacity .7s ease,transform .75s cubic-bezier(.16,1,.3,1)}
.adv.is-in .ch{opacity:1;transform:none}
.adv.is-in .ch:nth-child(2){transition-delay:.1s}
.adv.is-in .ch:nth-child(3){transition-delay:.2s}
.adv.is-in .ch:nth-child(4){transition-delay:.3s}
.ch .k{display:flex;align-items:center;gap:11px;font-size:10px;letter-spacing:.16em;
  font-weight:700;color:var(--dim)}
.ch .k::before{content:"";width:6px;height:6px;background:var(--cut);flex-shrink:0}
.ch b{display:block;margin-top:9px;font-family:'Archivo Expanded',Archivo,sans-serif;
  font-weight:800;font-size:clamp(.98rem,1.5vw,1.2rem);letter-spacing:-.022em}
.ch.last{background:var(--cut);color:#0A0A0A}
.ch.last .k{color:rgba(10,10,10,.6)}
.ch.last .k::before{background:#0A0A0A}

@media(prefers-reduced-motion:reduce){ .ch{opacity:1;transform:none} }