.stream-hero{
  position:relative;
  overflow-x:clip;
  border-bottom:1px solid var(--color-line);
}
.stream-hero-lines{
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    repeating-radial-gradient(circle at 18% 46%,transparent 0 92px,var(--color-shadow-soft) 92px 93px),
    linear-gradient(to bottom,transparent,var(--color-surface-soft));
  opacity:.62;
}
.stream-hero-grid{
  display:grid;
  min-height:calc(100svh - var(--header-height));
  grid-template-columns:minmax(0,1fr) minmax(360px,.9fr);
  align-items:center;
  gap:clamp(2rem,6vw,5.5rem);
  padding-top:70px;
  padding-bottom:70px;
}
.stream-copy{
  position:relative;
  z-index:2;
  min-width:0;
  max-width:650px;
}
.stream-copy h1{
  max-width:9em;
  margin-top:1rem;
  margin-bottom:.35em;
}
.stream-intro{
  max-width:38rem;
  margin-bottom:0;
  color:var(--color-ink-soft);
  font-size:clamp(1.05rem,1.6vw,1.22rem);
}
.stream-intro strong{color:var(--color-ink)}
.stream-atlas{
  position:relative;
  z-index:1;
  min-width:0;
  padding:1rem;
}
.stream-atlas svg{
  width:100%;
  height:auto;
  color:var(--color-ink);
}
.atlas-shadow{fill:var(--color-shadow-soft)}
.atlas-frame{
  fill:var(--color-surface);
  stroke:var(--color-ink);
  stroke-width:2;
}
.atlas-grid{
  fill:none;
  stroke:var(--color-line);
  stroke-width:1;
}
.atlas-route{
  fill:none;
  stroke:var(--color-accent);
  stroke-width:4;
  stroke-linecap:round;
}
.atlas-route-secondary{
  stroke-width:2;
  opacity:.64;
}
.atlas-node{
  fill:var(--color-surface);
  stroke:var(--color-accent);
  stroke-width:4;
}
.atlas-beam{
  fill:var(--color-accent);
  stroke:var(--color-surface);
  stroke-width:3;
}
.atlas-stand{
  fill:none;
  stroke:var(--color-ink);
  stroke-width:7;
  stroke-linecap:round;
}
.atlas-caption{
  display:flex;
  flex-wrap:wrap;
  justify-content:center;
  gap:.55rem;
  margin-top:-.2rem;
}
.atlas-caption span{
  padding:.28rem .68rem;
  border:1px solid var(--color-line);
  border-radius:var(--radius-pill);
  background:var(--color-surface);
  color:var(--color-ink-soft);
  font-family:var(--font-mono);
  font-size:.72rem;
}
.support-table{
  width:100%;
  min-width:760px;
  border-collapse:collapse;
}
.support-table th,
.support-table td{
  padding:1rem 1.1rem;
  border-bottom:1px solid var(--color-line);
  text-align:left;
  vertical-align:top;
}
.support-table th{
  background:var(--color-surface-soft);
  font-size:.82rem;
  font-weight:800;
}
.support-table td:first-child{
  color:var(--color-ink);
  font-family:var(--font-display);
  font-weight:800;
}
.support-table tr:last-child td{border-bottom:0}
.status-label{
  display:inline-flex;
  max-width:100%;
  min-height:28px;
  align-items:center;
  padding:.22rem .68rem;
  overflow:hidden;
  border:1px solid var(--color-accent);
  border-radius:var(--radius-pill);
  color:var(--color-accent);
  font-size:.78rem;
  line-height:1.3;
}
.support-note{margin-top:1.25rem}
.mechanism-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1.2rem;
}
.mechanism-card{
  position:relative;
  min-height:250px;
  overflow:hidden;
}
.mechanism-card h3{
  position:relative;
  margin-top:2.8rem;
}
.mechanism-card p{
  position:relative;
  margin-bottom:0;
  color:var(--color-ink-soft);
}
.mechanism-mark{
  position:absolute;
  top:1rem;
  right:1.2rem;
  color:var(--color-line);
  font-family:var(--font-mono);
  font-size:4.2rem;
  font-weight:800;
  line-height:1;
}
.route-explainer{min-width:0}
.ip-compare{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1.25rem;
  margin-bottom:1.25rem;
}
.ip-panel{
  min-width:0;
  padding:clamp(1.3rem,3vw,2rem);
  border-top:1px solid var(--color-line);
  border-bottom:1px solid var(--color-line);
}
.ip-panel-head{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  margin-bottom:1rem;
}
.ip-panel-head h3{margin:0}
.ip-panel p{color:var(--color-ink-soft)}
.ip-panel p:last-child{margin-bottom:0}
.quality-layout{
  display:grid;
  grid-template-columns:minmax(0,1.25fr) minmax(280px,.75fr);
  gap:1.3rem;
  align-items:start;
}
.quality-main p{color:var(--color-ink-soft)}
.quality-main p:last-child{margin-bottom:0}
.quality-points{
  display:grid;
  gap:.85rem;
}
.quality-point{
  padding:1.15rem 1.25rem;
  border-left:3px solid var(--color-accent);
  border-radius:0 var(--radius-card) var(--radius-card) 0;
  background:var(--color-surface);
  box-shadow:var(--shadow-card);
}
.quality-point h3{
  margin-bottom:.35rem;
  font-size:1.08rem;
}
.quality-point p{
  margin-bottom:0;
  color:var(--color-ink-soft);
}
.error-ledger{
  border-top:1px solid var(--color-line);
}
.error-entry{
  display:grid;
  grid-template-columns:minmax(120px,.32fr) minmax(0,1.68fr);
  gap:1.5rem;
  padding:1.45rem 0;
  border-bottom:1px solid var(--color-line);
}
.error-kind{
  color:var(--color-accent);
  font-family:var(--font-mono);
  font-size:.78rem;
  font-weight:700;
  letter-spacing:.08em;
}
.error-entry h3{
  margin-bottom:.45rem;
  font-size:1.16rem;
}
.error-entry p{
  max-width:var(--line-readable);
  margin-bottom:0;
  color:var(--color-ink-soft);
}
.stream-checklist{
  display:grid;
  gap:0;
  padding:0;
  margin:0;
  counter-reset:stream-step;
}
.stream-checklist li{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:1.2rem;
  padding:1.4rem 0;
  border-bottom:1px solid var(--color-line);
  list-style:none;
  counter-increment:stream-step;
}
.stream-checklist li:first-child{border-top:1px solid var(--color-line)}
.stream-checklist li::before{
  content:counter(stream-step);
  display:grid;
  width:42px;
  height:42px;
  place-items:center;
  border:1px solid var(--color-accent);
  border-radius:50%;
  color:var(--color-accent);
  font-family:var(--font-mono);
  font-weight:800;
}
.stream-checklist h3{
  margin-bottom:.4rem;
  font-size:1.15rem;
}
.stream-checklist p{
  max-width:var(--line-readable);
  margin-bottom:0;
  color:var(--color-ink-soft);
}
.fact-shelf{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1rem;
}
.fact-card{display:flex;flex-direction:column}
.fact-label{
  margin-bottom:.8rem;
  color:var(--color-accent);
  font-family:var(--font-mono);
  font-size:.74rem;
  font-weight:700;
  letter-spacing:.09em;
}
.fact-card strong{
  display:block;
  margin-bottom:.55rem;
  font-family:var(--font-display);
  font-size:1.14rem;
  line-height:1.4;
}
.fact-card p{
  margin-top:auto;
  margin-bottom:0;
  color:var(--color-ink-soft);
}
.related-panel{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  align-items:center;
  gap:2rem;
  margin-top:2rem;
  padding:clamp(1.4rem,4vw,2.4rem);
  border:1px solid var(--color-accent);
  border-radius:var(--radius-card);
  background:var(--color-surface);
  box-shadow:var(--shadow-raised);
}
.related-panel h2{
  margin-bottom:.35rem;
  font-size:clamp(1.6rem,3vw,2.25rem);
}
.related-panel p:last-child{
  max-width:46rem;
  margin-bottom:0;
  color:var(--color-ink-soft);
}
@media(max-width:980px){
  .stream-hero-grid{
    grid-template-columns:1fr;
    gap:1.5rem;
    padding-top:54px;
  }
  .stream-atlas{
    width:100%;
    max-width:570px;
    margin-inline:auto;
  }
  .quality-layout{grid-template-columns:1fr}
}
@media(max-width:768px){
  .stream-hero-lines{display:none}
  .stream-hero-grid{
    min-height:auto;
    padding-top:38px;
    padding-bottom:32px;
  }
  .stream-atlas{
    max-height:280px;
    overflow:hidden;
    padding:0;
  }
  .stream-atlas svg{
    max-width:360px;
    margin-inline:auto;
    transform:translateY(-18px);
  }
  .atlas-caption{display:none}
  .mechanism-grid,
  .ip-compare,
  .fact-shelf{grid-template-columns:1fr}
  .mechanism-card{min-height:0}
  .error-entry{
    grid-template-columns:1fr;
    gap:.45rem;
  }
  .related-panel{grid-template-columns:1fr}
}
@media(max-width:640px){
  .stream-atlas{max-height:220px}
  .stream-atlas svg{max-width:300px}
  .mechanism-mark{font-size:3.2rem}
  .stream-checklist li{gap:.85rem}
  .stream-checklist li::before{
    width:36px;
    height:36px;
  }
}
@media(prefers-reduced-motion:reduce){
  .stream-atlas svg{transform:none}
}