.stream-hero {
  position: relative;
  overflow: clip;
  border-bottom: 1px solid var(--color-line);
  background: var(--color-canvas);
}

.stream-hero::before {
  position: absolute;
  top: 4%;
  right: 2%;
  width: 52vw;
  height: 52vw;
  border-radius: var(--radius-pill);
  background: radial-gradient(closest-side, var(--color-glow), transparent);
  content: "";
  pointer-events: none;
}

.stream-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(390px, 0.88fr);
  min-height: 690px;
  align-items: center;
  gap: clamp(38px, 7vw, 92px);
  padding-top: 72px;
  padding-bottom: 72px;
}

.stream-hero-copy {
  position: relative;
  z-index: 2;
}

.stream-hero-copy h1 {
  max-width: 680px;
  margin-top: 22px;
  font-size: clamp(52px, 5.2vw, 68px);
}

.stream-hero-lead {
  max-width: 660px;
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 18px;
  line-height: 1.8;
}

.stream-hero-lead strong {
  color: var(--color-ink);
}

.stream-hero-actions {
  margin-top: 30px;
}

.stream-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 24px;
}

.stream-trust span {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 6px 11px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 700;
}

.stream-index-card {
  position: relative;
  z-index: 1;
  padding: 18px;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
  box-shadow: var(--shadow-device);
  transform: rotate(0.4deg);
}

.stream-index-card::before {
  position: absolute;
  top: 16px;
  right: -10px;
  bottom: -10px;
  left: 16px;
  z-index: -1;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-panel-strong);
  content: "";
}

.stream-index-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding: 4px 4px 16px;
  border-bottom: 1px solid var(--color-line);
}

.stream-index-head span,
.stream-index-query,
.stream-index-foot,
.ip-key,
.quality-key,
.next-index span,
.stream-facts span {
  font-family: var(--font-mono);
}

.stream-index-head span {
  color: var(--color-muted);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.stream-index-head strong {
  font-size: 18px;
}

.stream-index-query {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin: 16px 0;
  padding: 14px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  background: var(--color-accent-soft);
  color: var(--color-muted);
  font-size: 12px;
}

.stream-index-query strong {
  color: var(--color-accent-dark);
}

.stream-platform-list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.stream-platform-list li {
  display: flex;
  min-height: 49px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 11px 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-canvas);
}

.stream-platform-list li:first-child {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.stream-platform-list span {
  color: var(--color-ink);
  font-weight: 800;
}

.stream-platform-list b {
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 650;
  text-align: right;
}

.stream-index-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 13px;
  margin-top: 16px;
  padding: 14px 4px 2px;
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
  font-size: 10px;
}

.stream-article > .toc-tabs {
  margin-top: 26px;
}

.stream-prose {
  font-size: 17px;
  line-height: 1.9;
}

.stream-prose p {
  margin-bottom: 22px;
}

.stream-prose .callout {
  margin-top: 32px;
}

.stream-support-table {
  width: 100%;
  min-width: 920px;
  border-collapse: collapse;
  background: var(--color-canvas);
}

.stream-support-table th,
.stream-support-table td {
  padding: 16px 18px;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-ink);
  text-align: left;
  vertical-align: top;
}

.stream-support-table th {
  background: var(--color-ink);
  color: var(--color-canvas);
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}

.stream-support-table tbody tr:nth-child(even) {
  background: var(--color-panel);
}

.stream-support-table tbody tr:hover {
  background: var(--color-accent-soft);
}

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

.stream-support-table .support-yes {
  color: var(--color-success);
  font-weight: 800;
  white-space: nowrap;
}

.stream-table-note {
  margin-top: 16px;
  color: var(--color-muted);
  font-size: 14px;
}

.ip-compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 34px;
}

.ip-card {
  position: relative;
  min-width: 0;
  padding: clamp(24px, 4vw, 36px);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
  box-shadow: var(--shadow-panel);
}

.ip-card:first-child {
  border-top-color: var(--color-accent);
}

.ip-card:last-child {
  border-top-color: var(--color-success);
}

.ip-key,
.quality-key {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--color-accent);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.ip-card:last-child .ip-key {
  color: var(--color-success);
}

.ip-card p {
  color: var(--color-muted);
  line-height: 1.8;
}

.quality-ledger {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-bottom: 34px;
  border-top: 1px solid var(--color-line);
  border-left: 1px solid var(--color-line);
}

.quality-ledger article {
  min-width: 0;
  padding: clamp(24px, 4vw, 36px);
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  background: var(--color-canvas);
}

.quality-ledger article:nth-child(2),
.quality-ledger article:nth-child(3) {
  background: var(--color-panel);
}

.quality-ledger h3 {
  font-size: 24px;
}

.quality-ledger p {
  color: var(--color-muted);
  line-height: 1.8;
}

.error-directory {
  display: grid;
  gap: 11px;
}

.error-entry {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
}

.error-entry summary {
  position: relative;
  padding: 18px 52px 18px 20px;
  color: var(--color-ink);
  font-weight: 800;
  list-style: none;
}

.error-entry summary::-webkit-details-marker {
  display: none;
}

.error-entry summary::after {
  position: absolute;
  top: 50%;
  right: 20px;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--color-muted);
  border-bottom: 2px solid var(--color-muted);
  content: "";
  transform: translateY(-70%) rotate(45deg);
  transition: transform var(--transition-fast);
}

.error-entry[open] {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-panel);
}

.error-entry[open] summary::after {
  transform: translateY(-25%) rotate(225deg);
}

.error-entry div {
  padding: 0 20px 20px;
}

.error-entry p {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.8;
}

.error-callout {
  margin-top: 28px;
}

.stream-steps {
  display: grid;
  gap: 0;
  margin: 0 0 42px;
  padding: 0;
  counter-reset: stream-step;
  list-style: none;
}

.stream-steps li {
  position: relative;
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 18px;
  padding-bottom: 28px;
  counter-increment: stream-step;
}

.stream-steps li::before {
  position: relative;
  z-index: 1;
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  content: counter(stream-step);
  font-family: var(--font-mono);
  font-weight: 800;
}

.stream-steps li:not(:last-child)::after {
  position: absolute;
  top: 48px;
  bottom: 0;
  left: 23px;
  width: 1px;
  background: var(--color-line);
  content: "";
}

.stream-steps h3 {
  margin-bottom: 7px;
  font-size: 22px;
}

.stream-steps p {
  margin: 0;
  color: var(--color-muted);
  line-height: 1.8;
}

.stream-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-bottom: 38px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
  box-shadow: var(--shadow-panel);
}

.stream-facts div {
  min-width: 0;
  padding: 24px;
  border-bottom: 1px solid var(--color-line);
}

.stream-facts div:nth-child(odd) {
  border-right: 1px solid var(--color-line);
}

.stream-facts div:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.stream-facts span {
  display: block;
  margin-bottom: 7px;
  color: var(--color-accent);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.stream-facts strong {
  overflow-wrap: anywhere;
  color: var(--color-ink);
  font-size: 18px;
}

.next-index {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 42px;
}

.next-index a {
  position: relative;
  min-width: 0;
  padding: 26px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
  transition: border-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.next-index a:hover {
  border-color: var(--color-accent);
  transform: translateY(-3px);
  box-shadow: var(--shadow-panel);
}

.next-index span {
  display: block;
  margin-bottom: 12px;
  color: var(--color-accent);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.next-index strong {
  display: block;
  color: var(--color-ink);
  font-size: 22px;
}

.next-index p {
  margin-top: 9px;
  color: var(--color-muted);
}

@media (max-width: 980px) {
  .stream-hero-grid {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .stream-index-card {
    width: min(100%, 620px);
    margin-inline: auto;
    transform: none;
  }
}

@media (max-width: 768px) {
  .stream-hero-grid {
    padding-top: 56px;
    padding-bottom: 64px;
  }

  .stream-hero-copy h1 {
    font-size: clamp(28px, 9.2vw, 40px);
  }

  .stream-hero-lead {
    font-size: 16px;
  }

  .ip-compare,
  .quality-ledger,
  .next-index {
    grid-template-columns: 1fr;
  }

  .quality-ledger article:nth-child(2),
  .quality-ledger article:nth-child(3) {
    background: var(--color-canvas);
  }

  .quality-ledger article:nth-child(even) {
    background: var(--color-panel);
  }
}

@media (max-width: 640px) {
  .stream-hero::before {
    top: 22%;
    right: -40%;
    width: 140vw;
    height: 140vw;
  }

  .stream-index-card {
    padding: 14px;
  }

  .stream-index-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }

  .stream-platform-list li {
    align-items: flex-start;
    flex-direction: column;
    gap: 3px;
  }

  .stream-platform-list b {
    text-align: left;
  }

  .stream-prose {
    font-size: 16px;
  }

  .stream-facts {
    grid-template-columns: 1fr;
  }

  .stream-facts div,
  .stream-facts div:nth-child(odd),
  .stream-facts div:nth-last-child(-n + 2) {
    border-right: 0;
    border-bottom: 1px solid var(--color-line);
  }

  .stream-facts div:last-child {
    border-bottom: 0;
  }

  .stream-steps li {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 13px;
  }

  .stream-steps li::before {
    width: 40px;
    height: 40px;
  }

  .stream-steps li:not(:last-child)::after {
    top: 40px;
    left: 19px;
  }

  .next-index a {
    padding: 22px;
  }
}