.signal-strip {
  position: relative;
  z-index: 2;
  margin-top: -2px;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: rgba(20, 25, 34, 0.72);
}

.signal-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
}

.signal-item {
  min-height: 112px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  padding: 18px 22px;
  border-right: 1px solid var(--color-border);
}

.signal-item:last-child {
  border-right: 0;
}

.signal-item strong {
  font-size: 26px;
  line-height: 1;
}

.signal-item span {
  color: var(--color-muted);
  font-size: 12px;
}

.signal-item--lead {
  background: var(--color-deep);
  color: var(--color-text);
}

.signal-item--lead span {
  color: rgba(247, 240, 228, 0.68);
}

.signal-item--lead strong {
  color: var(--color-secondary);
}

.rule-lab {
  padding: 122px 0 128px;
}

.rule-lab-layout {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 60px;
}

.rule-nav {
  position: sticky;
  top: 120px;
  align-self: start;
  display: grid;
  gap: 12px;
}

.rule-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 700;
}

.rule-nav a span {
  color: var(--color-primary);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 12px;
}

.rule-nav a:hover {
  color: var(--color-text);
}

.rule-list {
  border-top: 1px solid var(--color-text);
}

.rule-row {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) 120px;
  gap: 28px;
  align-items: start;
  padding: 28px 0;
  border-bottom: 1px solid var(--color-border);
}

.rule-number {
  color: var(--color-primary);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 15px;
  font-weight: 800;
}

.rule-row h3 {
  margin-bottom: 8px;
  font-size: 26px;
  letter-spacing: -0.04em;
}

.rule-row p {
  max-width: 630px;
  color: var(--color-muted);
  font-size: 15px;
}

.rule-row a {
  justify-self: end;
  padding-top: 6px;
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 800;
}

.topic-map {
  padding: 100px 0;
  background: var(--color-deep);
  color: var(--color-text);
}

.topic-map .section-heading p {
  color: rgba(247, 240, 228, 0.68);
}

.topic-map .eyebrow {
  color: var(--color-secondary);
}

.topic-grid {
  display: grid;
  grid-template-columns: minmax(280px, 1.2fr) minmax(180px, 0.8fr) minmax(260px, 1fr);
  gap: 14px;
}

.topic-panel {
  position: relative;
  min-height: 340px;
  overflow: hidden;
  border: 1px solid rgba(215, 169, 74, 0.28);
  background: rgba(255,255,255,0.05);
}

.topic-panel img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.88;
  transition: transform 500ms var(--ease-standard);
}

.topic-panel:hover img {
  transform: scale(1.04);
}

.topic-panel::after {
  position: absolute;
  inset: 40% 0 0;
  background: linear-gradient(180deg, transparent, rgba(7, 9, 13, 0.94));
  content: "";
}

.topic-panel-content {
  position: absolute;
  z-index: 1;
  left: 22px;
  right: 22px;
  bottom: 22px;
}

.topic-panel-content span {
  display: block;
  margin-bottom: 8px;
  color: var(--color-secondary);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 12px;
}

.topic-panel-content h3 {
  font-size: 28px;
  letter-spacing: -0.04em;
}

.topic-panel--tall {
  min-height: 420px;
  margin-top: -52px;
}

.topic-panel--short {
  min-height: 280px;
  margin-top: 50px;
}

.data-section {
  padding: 112px 0;
}

.data-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 70px;
  align-items: center;
}

.data-copy h2 {
  max-width: 500px;
  margin: 14px 0 20px;
  font-size: clamp(2.5rem, 5vw, 5rem);
  line-height: 0.95;
  letter-spacing: -0.07em;
}

.data-copy p {
  max-width: 460px;
  color: var(--color-muted);
}

.notice {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 28px;
  padding: 14px 16px;
  border-left: 3px solid var(--color-accent);
  background: rgba(255, 79, 121, 0.1);
  color: var(--color-ink-soft);
  font-size: 13px;
}

.notice::before {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  margin-top: 7px;
  border-radius: 50%;
  background: var(--color-accent);
  content: "";
}

.chart-card {
  padding: 26px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}

.chart-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 28px;
}

.chart-top strong {
  font-size: 22px;
}

.chart-top span {
  color: var(--color-success);
  font-size: 13px;
  font-weight: 800;
}

.chart {
  position: relative;
  min-height: 260px;
  border-bottom: 1px solid var(--color-border);
  background-image:
    linear-gradient(rgba(215, 169, 74, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(215, 169, 74, 0.14) 1px, transparent 1px);
  background-size: 20% 25%;
}

.chart svg {
  width: 100%;
  height: 240px;
  overflow: visible;
}

.chart-caption {
  display: flex;
  justify-content: space-between;
  margin-top: 14px;
  color: var(--color-muted);
  font-size: 11px;
}

.content-section {
  padding: 118px 0 130px;
  border-top: 1px solid var(--color-border);
}

.content-index {
  display: grid;
  grid-template-columns: minmax(260px, 0.65fr) minmax(0, 1.35fr);
  gap: 72px;
}

.content-index-sticky {
  position: sticky;
  top: 120px;
  align-self: start;
}

.content-index-sticky h2 {
  max-width: 390px;
  margin: 16px 0 20px;
  font-size: clamp(2.5rem, 5vw, 5rem);
  line-height: 0.94;
  letter-spacing: -0.07em;
}

.content-index-sticky p {
  max-width: 330px;
  color: var(--color-muted);
}

.article-list {
  border-top: 1px solid var(--color-text);
}

.article-list-item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr) 112px;
  align-items: center;
  gap: 18px;
  min-height: 104px;
  border-bottom: 1px solid var(--color-border);
  transition: padding 180ms ease, background 180ms ease;
}

.article-list-item:hover {
  padding: 0 14px;
  background: var(--color-surface);
}

.article-list-item > span {
  color: var(--color-primary);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 12px;
}

.article-list-item h3 {
  margin-bottom: 3px;
  font-size: 18px;
  letter-spacing: -0.03em;
}

.article-list-item p {
  overflow: hidden;
  color: var(--color-muted);
  font-size: 13px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.article-list-item time {
  justify-self: end;
  color: var(--color-muted);
  font-size: 12px;
}

.faq-section {
  padding: 92px 0 120px;
  background: var(--color-surface-muted);
}

.faq-list {
  border-top: 1px solid var(--color-text);
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 78px;
  list-style: none;
  font-size: 19px;
  font-weight: 800;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  color: var(--color-primary);
  content: "+";
  font-size: 28px;
  font-weight: 400;
  transition: transform 180ms ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  max-width: 760px;
  padding: 0 48px 24px 0;
  color: var(--color-muted);
  font-size: 15px;
}

@media (max-width: 900px) {
  .signal-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .signal-item:nth-child(2) {
    border-right: 0;
  }

  .rule-lab-layout,
  .data-layout,
  .content-index {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .rule-nav,
  .content-index-sticky {
    position: static;
  }

  .rule-nav {
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
  }

  .rule-nav a {
    display: block;
    padding: 8px 0;
  }

  .rule-nav a span {
    display: block;
    margin-bottom: 4px;
  }
}

@media (max-width: 650px) {
  .signal-grid {
    grid-template-columns: 1fr 1fr;
  }

  .signal-item {
    min-height: 96px;
    padding: 14px;
  }

  .signal-item--lead {
    grid-column: 1 / -1;
  }

  .rule-lab,
  .data-section,
  .content-section {
    padding: 78px 0 86px;
  }

  .rule-nav {
    display: flex;
    overflow-x: auto;
    gap: 16px;
    padding-bottom: 8px;
  }

  .rule-nav a {
    flex: 0 0 auto;
    border-bottom: 0;
  }

  .rule-row {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 16px;
  }

  .rule-row h3 {
    font-size: 22px;
  }

  .rule-row a {
    grid-column: 2;
    justify-self: start;
  }

  .topic-map {
    padding: 76px 0 82px;
  }

  .topic-grid {
    grid-template-columns: 1fr;
  }

  .topic-panel,
  .topic-panel--tall,
  .topic-panel--short {
    min-height: 260px;
    margin: 0;
  }

  .chart-card {
    padding: 16px;
  }

  .chart {
    min-height: 210px;
  }

  .chart svg {
    height: 198px;
  }

  .article-list-item {
    grid-template-columns: 42px minmax(0, 1fr);
    padding: 16px 0;
  }

  .article-list-item time {
    grid-column: 2;
    justify-self: start;
  }

  .article-list-item p {
    white-space: normal;
  }
}