.stream-hero {
  position: relative;
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border);
  background:
    radial-gradient(ellipse at 72% 42%, var(--color-accent-mist), var(--color-transparent) 64%),
    var(--color-bg);
  padding-top: 82px;
}

.stream-hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-grid) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, var(--color-grid) 1px, var(--color-transparent) 1px);
  background-size: 62px 62px;
  opacity: 0.58;
}

.stream-hero-inner {
  position: relative;
  z-index: 1;
}

.stream-hero-copy {
  max-width: 890px;
  margin-inline: auto;
  text-align: center;
}

.stream-hero-copy .badge {
  margin-bottom: 20px;
}

.stream-hero-copy h1 {
  max-width: 880px;
  margin-inline: auto;
}

.stream-lead {
  max-width: 760px;
  margin: 0 auto 26px;
  font-size: 17px;
}

.stream-trust {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 9px;
  margin-top: 20px;
}

.stream-lock-map {
  max-width: 980px;
  margin: 18px auto 0;
}

.stream-lock-map svg {
  width: 100%;
}

.stream-stop-top {
  stop-color: var(--color-accent-water);
}

.stream-stop-bottom {
  stop-color: var(--color-accent-water-deep);
}

.stream-water {
  fill: url("#stream-water");
}

.stream-route,
.stream-route-soft,
.stream-gate,
.stream-vessel,
.stream-container,
.stream-container-line {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.stream-route {
  stroke: var(--color-accent);
  stroke-width: 2;
}

.stream-route-soft {
  stroke: var(--color-line-soft);
  stroke-width: 1.2;
}

.stream-gate {
  stroke: var(--color-line-strong);
  stroke-width: 1.5;
}

.stream-vessel {
  fill: var(--color-panel-raised);
  stroke: var(--color-line-strong);
  stroke-width: 1.4;
}

.stream-container {
  fill: var(--color-panel);
  stroke: var(--color-line-strong);
  stroke-width: 1.3;
}

.stream-container-line {
  stroke: var(--color-border);
  stroke-width: 1;
}

.stream-signal-halo {
  fill: var(--color-accent);
  opacity: 0.22;
}

.stream-signal,
.stream-node {
  fill: var(--color-accent);
}

.stream-note {
  fill: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(250px, 0.72fr) minmax(0, 1.28fr);
  gap: 56px;
  align-items: start;
}

.content-grid .section-head {
  position: sticky;
  top: 28px;
  margin-bottom: 0;
}

.stream-explain-grid {
  display: grid;
  gap: 18px;
}

.stream-note-card,
.boundary-card,
.next-link-card {
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  box-shadow: inset 0 1px 0 var(--color-edge-highlight);
  padding: 26px;
}

.stream-note-card:nth-child(even) {
  margin-left: 34px;
}

.stream-card-code,
.route-index {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.09em;
}

.stream-note-card h3,
.boundary-card h3,
.next-link-card h3 {
  font-size: 23px;
}

.stream-note-card p:last-child,
.next-link-card p:last-of-type {
  margin-bottom: 0;
}

.stream-panel-section {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
}

.stream-support-table {
  width: 100%;
  min-width: 900px;
  border-collapse: collapse;
  background: var(--color-bg);
}

.stream-support-table th,
.stream-support-table td {
  border-bottom: 1px solid var(--color-border);
  padding: 15px 17px;
  text-align: left;
  vertical-align: top;
}

.stream-support-table th {
  background: var(--color-panel-raised);
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.stream-support-table td {
  color: var(--color-text-muted);
}

.stream-support-table td:first-child {
  color: var(--color-text);
  font-weight: 700;
}

.stream-support-table tr:last-child td {
  border-bottom: 0;
}

.support-conditional {
  display: inline-flex;
  min-height: 26px;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-panel);
  padding: 3px 9px;
  color: var(--color-warn);
  font-family: var(--font-mono);
  font-size: 11px;
  white-space: nowrap;
}

.stream-callout {
  margin-top: 22px;
}

.ip-compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.ip-column {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  box-shadow: inset 0 1px 0 var(--color-edge-highlight);
  padding: 30px;
}

.ip-column.is-raised {
  background: var(--color-panel-raised);
  transform: translateY(18px);
}

.ip-column-head {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-bottom: 14px;
}

.ip-column-head h3 {
  margin-bottom: 0;
}

.ip-column ul,
.boundary-card ul {
  margin-bottom: 0;
  padding-left: 20px;
}

.stream-long-copy {
  max-width: 900px;
  margin: 54px auto 0;
}

.quality-layout {
  display: grid;
  gap: 28px;
}

.quality-gauge {
  padding: 30px;
}

.quality-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 7px;
  margin-bottom: 28px;
}

.quality-segment {
  height: 6px;
  border-radius: var(--radius-pill);
  background: var(--color-border);
}

.quality-segment.is-accent {
  background: var(--color-accent);
  box-shadow: 0 0 20px var(--color-accent-glow);
}

.quality-items {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
}

.quality-items article {
  padding: 22px;
}

.quality-items article:nth-child(odd) {
  border-right: 1px solid var(--color-border);
}

.quality-items article:nth-child(-n+2) {
  border-bottom: 1px solid var(--color-border);
}

.quality-items h3 {
  font-size: 20px;
}

.quality-items p:last-child {
  margin-bottom: 0;
}

.error-dispatch {
  border-top: 1px solid var(--color-border);
}

.error-row {
  display: grid;
  grid-template-columns: minmax(190px, 0.48fr) minmax(0, 1.52fr);
  gap: 34px;
  border-bottom: 1px solid var(--color-border);
  padding: 28px 0;
}

.error-label h3 {
  margin-bottom: 0;
  font-size: 21px;
}

.error-body p:last-child {
  margin-bottom: 0;
}

.route-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.route-case {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 16px;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  padding: 27px;
}

.route-case h3 {
  font-size: 21px;
}

.route-case p:last-child {
  margin-bottom: 0;
}

.route-index {
  margin-bottom: 0;
}

.stream-workflow {
  max-width: 900px;
  margin: 0 auto 34px;
  padding: 0;
  list-style: none;
  counter-reset: stream-step;
}

.stream-workflow li {
  position: relative;
  display: grid;
  grid-template-columns: 50px minmax(0, 1fr);
  gap: 20px;
  border-bottom: 1px solid var(--color-border);
  padding: 25px 0;
  counter-increment: stream-step;
}

.stream-workflow li::before {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
  color: var(--color-accent);
  content: counter(stream-step);
  font-family: var(--font-mono);
  font-size: 12px;
}

.stream-workflow h3 {
  font-size: 21px;
}

.stream-workflow p:last-child {
  margin-bottom: 0;
}

.boundary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.plan-summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 30px;
  margin-top: 28px;
  padding: 28px;
}

.plan-summary h3 {
  font-size: 23px;
}

.plan-summary p {
  margin-bottom: 0;
}

.next-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 56px;
}

.next-link-card {
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.next-link-card:hover {
  border-color: var(--color-line-soft);
  transform: translateY(-2px);
}

.next-link-card .article-link {
  margin-top: 16px;
}

@media (max-width: 900px) {
  .content-grid {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .content-grid .section-head {
    position: static;
    margin-bottom: 20px;
  }

  .route-board,
  .quality-items {
    grid-template-columns: 1fr;
  }

  .quality-items article:nth-child(odd) {
    border-right: 0;
  }

  .quality-items article {
    border-bottom: 1px solid var(--color-border);
  }

  .quality-items article:last-child {
    border-bottom: 0;
  }

  .error-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

@media (max-width: 768px) {
  .stream-hero {
    padding-top: 58px;
  }

  .stream-hero-grid {
    background-size: 42px 42px;
  }

  .stream-lead {
    font-size: 15px;
  }

  .stream-lock-map svg {
    min-width: 660px;
    transform: translateX(-20%);
  }

  .stream-lock-map {
    min-height: 250px;
    overflow-x: clip;
  }

  .ip-compare,
  .boundary-grid,
  .next-links {
    grid-template-columns: 1fr;
  }

  .ip-column.is-raised {
    transform: none;
  }

  .stream-long-copy {
    margin-top: 30px;
  }

  .plan-summary {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .stream-hero-copy .badge {
    max-width: 100%;
  }

  .stream-trust {
    align-items: stretch;
    flex-direction: column;
  }

  .stream-trust .chip {
    justify-content: center;
  }

  .stream-note-card:nth-child(even) {
    margin-left: 0;
  }

  .stream-note-card,
  .ip-column,
  .boundary-card,
  .next-link-card,
  .quality-gauge {
    padding: 21px;
  }

  .route-case {
    grid-template-columns: 1fr;
    padding: 22px;
  }

  .stream-workflow li {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 14px;
  }

  .stream-workflow li::before {
    width: 34px;
    height: 34px;
  }

  .plan-summary {
    padding: 22px;
  }
}