.streaming-hero {
  padding-bottom: clamp(54px, 7vw, 88px);
}

.streaming-formula-card {
  width: min(980px, 100%);
  margin: 34px auto 0;
  padding: clamp(22px, 4vw, 44px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
  text-align: left;
}

.streaming-card-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--color-border);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
}

.streaming-formula {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: .27em;
  margin-top: 32px;
  font-family: var(--font-mono);
  font-size: clamp(68px, 9vw, 116px);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1;
}

.streaming-terms {
  display: grid;
  grid-template-columns: auto minmax(54px, 96px) auto minmax(70px, 132px) auto;
  gap: 14px;
  align-items: center;
  justify-content: center;
  margin-top: 28px;
}

.streaming-terms div {
  display: grid;
  gap: 3px;
  min-width: 0;
  text-align: center;
}

.streaming-terms strong {
  font-family: var(--font-mono);
  font-size: 14px;
}

.streaming-terms span {
  color: var(--color-muted);
  font-size: 12px;
  white-space: nowrap;
}

.streaming-terms svg {
  width: 100%;
  min-width: 0;
}

.streaming-arrow-line {
  fill: none;
  stroke: var(--color-accent);
  stroke-width: 2;
}

.streaming-arrow-head {
  fill: var(--color-accent);
}

.streaming-scale {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin-top: 34px;
  padding-top: 15px;
  border-top: 1px solid var(--color-text);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  text-align: center;
}

.streaming-scale span {
  position: relative;
  padding-top: 8px;
}

.streaming-scale span::before {
  position: absolute;
  top: -15px;
  left: 50%;
  width: 1px;
  height: 8px;
  background: var(--color-text);
  content: "";
}

.streaming-toc-wrap {
  padding-bottom: var(--section-space);
}

.streaming-article {
  width: 100%;
  max-width: 1060px;
  margin-inline: auto;
}

.streaming-section {
  padding-top: clamp(68px, 9vw, 108px);
  padding-bottom: clamp(68px, 9vw, 108px);
  border-bottom: 1px solid var(--color-border);
}

.streaming-section:last-child {
  border-bottom: 0;
}

.streaming-section > h2 {
  max-width: 860px;
}

.section-lead {
  max-width: 850px;
  margin-bottom: 30px;
  color: var(--color-muted);
  font-size: 16px;
}

.reading-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(260px, .7fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: start;
}

.streaming-principle {
  margin-top: 0;
}

.streaming-principle p {
  margin: 8px 0 0;
}

.streaming-table strong {
  white-space: nowrap;
}

.status-check {
  color: var(--color-warning);
  font-weight: 700;
  white-space: nowrap;
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 30px;
}

.concept-card {
  min-width: 0;
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  background: var(--color-panel);
}

.concept-symbol {
  display: grid;
  width: 42px;
  height: 42px;
  margin-bottom: 24px;
  place-items: center;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-xs);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-weight: 800;
}

.concept-card h3 {
  font-size: 23px;
}

.concept-card p {
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 14px;
}

.streaming-copy {
  max-width: 850px;
  margin-top: 32px;
}

.quality-notes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 34px;
  border-top: 1px solid var(--color-border);
}

.quality-notes article {
  min-width: 0;
  padding: 28px 26px 8px;
  border-right: 1px solid var(--color-border);
}

.quality-notes article:last-child {
  border-right: 0;
}

.quality-label {
  display: block;
  margin-bottom: 15px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
}

.quality-notes h3 {
  font-size: 21px;
}

.quality-notes p {
  color: var(--color-muted);
  font-size: 14px;
}

.error-note {
  max-width: 850px;
  margin: 26px 0 0;
  padding: 18px 20px;
  border-left: 3px solid var(--color-accent);
  background: var(--color-panel-soft);
  color: var(--color-muted);
  font-size: 14px;
}

.diagnostic-flow {
  margin-top: 34px;
  border-top: 1px solid var(--color-border);
}

.diagnostic-flow article {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 22px;
  padding: 28px 8px;
  border-bottom: 1px solid var(--color-border);
}

.flow-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
}

.diagnostic-flow article:hover .flow-mark {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.diagnostic-flow h3 {
  margin-bottom: 7px;
  font-size: 20px;
}

.diagnostic-flow p {
  max-width: 800px;
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
}

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

.next-link {
  position: relative;
  display: grid;
  min-width: 0;
  gap: 7px;
  padding: 24px 58px 24px 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-s);
  background: var(--color-panel);
  transition: border-color var(--motion-fast), transform var(--motion-fast);
}

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

.next-link-label {
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
}

.next-link strong {
  font-size: 17px;
}

.next-link svg {
  position: absolute;
  top: 50%;
  right: 22px;
  width: 22px;
  height: 22px;
  color: var(--color-accent);
  transform: translateY(-50%);
}

@media (max-width: 900px) {
  .reading-grid,
  .quality-notes {
    grid-template-columns: minmax(0, 1fr);
  }

  .quality-notes article {
    padding-right: 0;
    padding-left: 0;
    border-right: 0;
    border-bottom: 1px solid var(--color-border);
  }

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

@media (max-width: 768px) {
  .streaming-formula {
    font-size: clamp(54px, 17vw, 78px);
  }

  .streaming-terms {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .streaming-terms svg {
    width: min(150px, 60%);
    margin-inline: auto;
  }

  .streaming-terms div {
    text-align: left;
  }

  .streaming-terms span {
    white-space: normal;
  }

  .concept-grid,
  .next-links {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  .streaming-card-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }

  .streaming-formula-card {
    padding: 20px;
  }

  .streaming-scale {
    font-size: 9px;
  }

  .streaming-section {
    padding-top: 62px;
    padding-bottom: 62px;
  }

  .diagnostic-flow article {
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 14px;
    padding-right: 0;
    padding-left: 0;
  }
}