.page-insights {
  --flow-node: 12px;
  --flow-impact-gap: var(--space-2);
}

/* ---------- 面包屑 ---------- */
.page-insights .breadcrumbs {
  padding-block: var(--space-3) 0;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-insights .breadcrumbs a {
  color: var(--color-primary);
  text-decoration: none;
}

.page-insights .breadcrumbs a:hover {
  text-decoration: underline;
}

/* ---------- 首屏 ---------- */
.page-insights .insights-hero {
  padding-block: var(--space-4) var(--section-y-lg);
}

.page-insights .hero-intro {
  display: grid;
  gap: var(--space-3);
}

.page-insights .hero-title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: 700;
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-insights .hero-lede {
  margin: 0;
  font-size: var(--text-lg);
  line-height: 1.65;
  color: var(--color-ink-soft);
}

@media (min-width: 960px) {
  .page-insights .hero-intro {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: end;
    gap: var(--space-6);
  }

  .page-insights .hero-lede {
    max-width: 42ch;
  }
}

/* 关键数字带 */
.page-insights .hero-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3) var(--space-2);
  margin-top: var(--space-6);
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

@media (min-width: 760px) {
  .page-insights .hero-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    padding: var(--space-4);
    gap: var(--space-3);
  }
}

.page-insights .hm-item {
  min-width: 0;
}

.page-insights .hm-value {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-figure);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--color-contrast-accent);
}

.page-insights .hm-unit {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-contrast-ink);
  opacity: 0.82;
}

/* 横向刻度线 */
.page-insights .hero-rail {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.page-insights .hero-rail::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: calc(var(--flow-node) / 2 - 1px);
  height: 2px;
  border-radius: 2px;
  background: var(--color-line);
}

.page-insights .rail-stop {
  position: relative;
  padding-top: var(--space-3);
  font-size: var(--text-xs);
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--color-ink-soft);
}

.page-insights .rail-stop::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: var(--flow-node);
  height: var(--flow-node);
  border-radius: 4px;
  background: var(--color-primary);
}

/* 方向入口块 */
.page-insights .topic-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

@media (min-width: 700px) {
  .page-insights .topic-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-insights .topic-grid {
    grid-template-columns: 2.2fr 1.5fr 1.3fr 1fr;
  }
}

.page-insights .topic-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-height: 100%;
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
  color: var(--color-ink);
  text-decoration: none;
  transition: background-color 160ms ease, box-shadow 160ms ease;
}

.page-insights .topic-block--delivery {
  background: var(--color-primary-soft);
}

.page-insights .topic-block--channel {
  background: var(--color-surface-deep);
}

.page-insights .topic-block:hover {
  background: var(--color-highlight);
  box-shadow: var(--shadow-1);
}

.page-insights .topic-count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-insights .topic-name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-ink);
}

.page-insights .topic-note {
  font-size: var(--text-sm);
  line-height: 1.62;
  color: var(--color-ink-soft);
  flex: 1;
}

.page-insights .topic-more {
  margin-top: var(--space-1);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-xs);
  color: var(--color-primary);
}

/* ---------- 纵向时间线 ---------- */
.page-insights .insights-block {
  padding-block: 0 var(--section-y-lg);
}

.page-insights .flow-track {
  position: relative;
  margin-top: var(--space-4);
  padding-left: var(--space-4);
}

.page-insights .flow-track::before {
  content: "";
  position: absolute;
  left: calc((var(--flow-node) - 2px) / 2);
  top: var(--space-2);
  bottom: var(--space-2);
  width: 2px;
  border-radius: 2px;
  background: var(--color-line);
}

.page-insights .flow-card {
  position: relative;
  margin: 0 0 var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
  transition: background-color 160ms ease, box-shadow 160ms ease;
  max-width: 100%;
}

.page-insights .flow-card:last-child {
  margin-bottom: 0;
}

.page-insights .flow-card:hover {
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
}

.page-insights .flow-card::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-4));
  top: var(--space-3);
  width: var(--flow-node);
  height: var(--flow-node);
  border-radius: 4px;
  background: var(--color-surface-deep);
}

.page-insights .flow-card--focus {
  background: var(--color-primary-soft);
}

.page-insights .flow-card--focus::before {
  background: var(--color-primary);
}

@media (min-width: 900px) {
  .page-insights .flow-card--narrow {
    max-width: 78%;
  }
}

.page-insights .flow-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) var(--space-2);
  margin-bottom: var(--space-2);
}

.page-insights .flow-seq {
  margin-left: auto;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-insights .flow-card .cell-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-ink);
}

.page-insights .flow-card .cell-text {
  margin: 0 0 var(--flow-impact-gap);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-insights .flow-impact {
  margin: 0;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  font-size: var(--text-sm);
  line-height: 1.68;
  color: var(--color-ink);
}

.page-insights .flow-card--focus .flow-impact {
  background: var(--color-surface);
}

.page-insights .flow-impact strong {
  font-weight: 600;
  color: var(--color-primary);
}

.page-insights .flow-media {
  margin: 0 0 var(--space-3);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-insights .flow-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 季度柱形小图 */
.page-insights .delivery-chart {
  margin: var(--space-4) 0 0;
  padding: var(--space-3);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
}

.page-insights .delivery-chart svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 180px;
}

.page-insights .delivery-chart .qc-bar {
  fill: var(--color-primary);
}

.page-insights .delivery-chart .qc-bar--peak {
  fill: var(--color-accent);
}

.page-insights .delivery-chart figcaption {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

/* ---------- 收尾 ---------- */
.page-insights .closing-block {
  padding-block: 0 var(--section-y-lg);
}

.page-insights .closing-card {
  max-width: calc(var(--measure) * 0.82);
}

.page-insights .closing-title {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1.28;
  color: var(--color-ink);
}

.page-insights .closing-list {
  display: grid;
  gap: var(--space-2);
  margin: 0 0 var(--space-3);
  padding: 0;
  list-style: none;
}

.page-insights .closing-list li {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  background: var(--color-surface-alt);
  transition: background-color 160ms ease;
}

.page-insights .closing-list li:hover {
  background: var(--color-highlight);
}

.page-insights .closing-list a {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: 600;
  line-height: 1.5;
  color: var(--color-primary);
  text-decoration: none;
}

.page-insights .closing-list a:hover {
  text-decoration: underline;
}

.page-insights .closing-list span {
  font-size: var(--text-sm);
  line-height: 1.62;
  color: var(--color-ink-soft);
}

.page-insights .closing-contact {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
}

.page-insights .closing-contact a {
  color: var(--color-primary);
  text-decoration: none;
}

.page-insights .closing-contact a:hover {
  text-decoration: underline;
}

/* ---------- 交互与可访问性 ---------- */
.page-insights a:focus-visible,
.page-insights .topic-block:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  .page-insights *,
  .page-insights *::before,
  .page-insights *::after {
    transition: none !important;
  }
}