.page-insights {
  background: var(--color-surface);
  color: var(--color-ink);
}

.page-insights a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------- 通用小件 ---------- */

.page-insights .pi-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
  margin: 0 0 var(--space-4);
}

.page-insights .pi-crumb a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px dotted currentColor;
  padding-bottom: 1px;
}

.page-insights .pi-crumb a:hover {
  color: var(--color-contrast-accent);
}

.page-insights .pi-crumb__sep {
  opacity: 0.55;
}

.page-insights .pi-figure {
  margin: 0;
}

.page-insights .pi-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
  background: var(--color-surface-alt);
}

.page-insights .pi-figure figcaption {
  margin-top: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: var(--leading-body);
  letter-spacing: 0.02em;
  color: var(--color-ink-muted);
}

/* ---------- 首屏 ---------- */

.page-insights .pi-hero {
  position: relative;
  overflow: hidden;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: var(--section-y-lg) 0 0;
}

.page-insights .pi-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    90deg,
    color-mix(in srgb, var(--color-contrast-line) 50%, transparent) 0 1px,
    transparent 1px calc(var(--space-8) * 2)
  );
}

.page-insights .pi-hero__top,
.page-insights .pi-hero__band-inner {
  position: relative;
  z-index: 1;
}

.page-insights .pi-hero__grid {
  display: grid;
  gap: var(--space-6);
  align-items: end;
}

.page-insights .pi-hero__kicker {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
}

.page-insights .pi-hero__title {
  margin: 0 0 var(--space-3);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  font-weight: var(--weight-heading);
  color: var(--color-primary-ink);
  max-width: 20ch;
}

.page-insights .pi-hero__lede {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 84%, transparent);
}

.page-insights .pi-figure--deep img {
  border-color: var(--color-contrast-line);
  background: color-mix(in srgb, var(--color-contrast-line) 40%, transparent);
}

.page-insights .pi-hero__figure figcaption {
  color: color-mix(in srgb, var(--color-contrast-ink) 58%, transparent);
}

.page-insights .pi-hero__band {
  margin-top: var(--space-8);
  border-top: 1px solid var(--color-contrast-line);
  background: color-mix(in srgb, var(--color-contrast-line) 24%, transparent);
}

.page-insights .pi-hero__band-inner {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-4) var(--gutter);
}

.page-insights .pi-metrics {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
}

.page-insights .pi-metric {
  display: flex;
  flex-direction: column;
  gap: calc(var(--space-1) / 2);
  padding-right: var(--space-2);
  border-right: 1px dashed var(--color-contrast-line);
}

.page-insights .pi-metric:last-child {
  border-right: 0;
  padding-right: 0;
}

.page-insights .pi-metric__value {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-primary-ink);
  font-variant-numeric: tabular-nums;
}

.page-insights .pi-metric__label {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: color-mix(in srgb, var(--color-contrast-ink) 66%, transparent);
}

.page-insights .pi-train {
  list-style: none;
  margin: 0;
  padding: var(--space-2) 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
  border-top: 1px dashed var(--color-contrast-line);
}

.page-insights .pi-train__item {
  position: relative;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent);
}

.page-insights .pi-train__item::before {
  content: "";
  display: inline-block;
  width: var(--space-1);
  height: 1px;
  margin-right: calc(var(--space-1) / 2);
  vertical-align: middle;
  background: var(--color-contrast-accent);
}

/* ---------- 侧边轨道 ---------- */

.page-insights .pi-rail {
  display: none;
}

/* ---------- 分区 ---------- */

.page-insights .pi-zone {
  padding: var(--section-y) 0;
  border-top: 1px dashed var(--color-line);
}

.page-insights .pi-zone__head {
  display: grid;
  gap: var(--space-2);
  padding-bottom: var(--space-3);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-line);
}

.page-insights .pi-zone__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-3xl);
  line-height: 1;
  letter-spacing: 0;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}

.page-insights .pi-zone__title {
  margin: 0;
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: 0.08em;
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-insights .pi-zone__note {
  margin: var(--space-1) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-insights .pi-zone__figure {
  margin: 0 0 var(--space-6);
}

.page-insights .pi-zone__body {
  display: grid;
  gap: var(--space-6);
}

.page-insights .pi-zone__figures {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-6);
}

/* ---------- 分组 ---------- */

.page-insights .pi-group {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  overflow: hidden;
}

.page-insights .pi-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-deep);
  border-bottom: 1px solid var(--color-line);
}

.page-insights .pi-group__code {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-radius: var(--radius-sm);
  padding: 2px var(--space-1);
}

.page-insights .pi-group__name {
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink);
}

.page-insights .pi-group__topics {
  display: grid;
  gap: 0;
}

/* ---------- 专题卡 ---------- */

.page-insights .pi-topic {
  position: relative;
  padding: var(--space-3);
}

.page-insights .pi-topic::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--color-primary);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 160ms ease;
}

.page-insights .pi-topic:hover::before,
.page-insights .pi-topic:focus-within::before {
  transform: scaleY(1);
}

.page-insights .pi-group__topics > .pi-topic + .pi-topic {
  border-top: 1px dashed var(--color-line);
}

.page-insights .pi-topic__no {
  display: inline-block;
  margin-bottom: var(--space-2);
  padding: 2px var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-radius: var(--radius-sm);
}

.page-insights .pi-topic__title {
  margin: 0 0 var(--space-2);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  letter-spacing: 0.04em;
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-insights .pi-topic__lede {
  margin: 0 0 var(--space-3);
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-insights .pi-points {
  list-style: none;
  counter-reset: pi;
  margin: 0 0 var(--space-3);
  padding: 0;
  border-top: 1px dashed var(--color-line);
}

.page-insights .pi-points > li {
  counter-increment: pi;
  display: grid;
  grid-template-columns: var(--space-4) minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-bottom: 1px dashed var(--color-line);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-insights .pi-points > li::before {
  content: counter(pi, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-primary);
  padding-top: 3px;
}

.page-insights .pi-topic__entries {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  padding-top: var(--space-2);
  border-top: 1px dashed var(--color-line);
}

.page-insights .pi-topic__entries-label {
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
  margin-right: calc(var(--space-1) / 2);
}

.page-insights .pi-code {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.02em;
  color: var(--color-ink);
  background: var(--color-surface-alt);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 2px var(--space-1);
}

.page-insights .pi-topic__link {
  display: inline-block;
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid currentColor;
  padding-bottom: 1px;
  transition: color 140ms ease;
}

.page-insights .pi-topic__link:hover {
  color: var(--color-accent);
}

/* ---------- 收束路径 ---------- */

.page-insights .pi-paths {
  padding: var(--section-y-lg) 0;
  background: var(--color-surface-alt);
  border-top: 1px solid var(--color-line);
}

.page-insights .pi-paths .pi-zone__head {
  border-bottom-color: color-mix(in srgb, var(--color-line) 100%, transparent);
}

.page-insights .pi-paths__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  max-width: var(--measure);
}

.page-insights .pi-path {
  display: grid;
  grid-template-columns: var(--space-4) minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-3) 0;
  border-bottom: 1px dashed var(--color-line);
}

.page-insights .pi-path__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-primary);
  padding-top: 2px;
}

.page-insights .pi-path__title {
  margin: 0 0 var(--space-1);
  font-size: var(--text-base);
  line-height: var(--leading-heading);
  letter-spacing: 0.03em;
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-insights .pi-path__desc {
  margin: 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 响应式 ---------- */

@media (min-width: 768px) {
  .page-insights .pi-zone__head {
    grid-template-columns: var(--space-8) minmax(0, 1fr);
    align-items: start;
    gap: var(--space-3);
  }

  .page-insights .pi-hero__band-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-insights .pi-zone__figures {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .page-insights .pi-points > li {
    grid-template-columns: var(--space-6) minmax(0, 1fr);
  }

  .page-insights .pi-path {
    grid-template-columns: var(--space-6) minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-insights .pi-group__topics--two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-insights .pi-group__topics--two > .pi-topic + .pi-topic {
    border-top: 0;
    border-left: 1px dashed var(--color-line);
  }
}

@media (min-width: 1024px) {
  .page-insights .pi-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
  }

  .page-insights .pi-hero__band-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
    gap: var(--space-6);
  }

  .page-insights .pi-metrics {
    gap: var(--space-3);
  }

  .page-insights .pi-zone__body {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-6);
    align-items: start;
  }

  .page-insights .pi-zone__body > :only-child {
    grid-column: 1 / -1;
  }

  .page-insights .pi-zone__body > .pi-group:nth-child(even) {
    margin-top: var(--space-8);
  }
}

@media (min-width: 1440px) {
  .page-insights .pi-rail {
    display: block;
    position: fixed;
    right: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    z-index: 20;
  }

  .page-insights .pi-rail__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    align-items: flex-end;
  }

  .page-insights .pi-rail__link {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    letter-spacing: 0.08em;
    text-decoration: none;
    color: var(--color-ink-muted);
    transition: color 160ms ease;
  }

  .page-insights .pi-rail__link::after {
    content: "";
    display: block;
    width: var(--space-2);
    height: 1px;
    background: var(--color-line);
    transition: width 160ms ease, background-color 160ms ease;
  }

  .page-insights .pi-rail__link:hover,
  .page-insights .pi-rail__link.is-active {
    color: var(--color-primary);
  }

  .page-insights .pi-rail__link:hover::after,
  .page-insights .pi-rail__link.is-active::after {
    width: var(--space-4);
    background: var(--color-primary);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-insights .pi-topic::before,
  .page-insights .pi-rail__link,
  .page-insights .pi-rail__link::after,
  .page-insights .pi-topic__link {
    transition: none;
  }
}