.page-insights {
  --insights-topbar: calc(var(--space-8) + var(--space-4));
  --insights-half: calc(var(--space-1) / 2);
}

/* ---------- 首屏 ---------- */
.page-insights .insights-hero {
  padding-block: var(--space-4) var(--section-y);
  background-image: linear-gradient(
    180deg,
    var(--color-primary-soft) 0%,
    var(--color-surface) 72%
  );
  border-bottom: var(--border-thick) solid var(--color-ink);
}

.page-insights .insights-hero .breadcrumbs {
  margin-bottom: var(--space-3);
}

.page-insights .insights-hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(var(--text-2xl), 6.2vw, var(--text-4xl));
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  max-width: 20ch;
  margin-block: var(--space-2) var(--space-3);
}

.page-insights .insights-hero .lede {
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.page-insights .hero-stats {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
}

.page-insights .hero-stats li {
  border-top: var(--border-thick) solid var(--color-ink);
  padding-top: var(--space-1);
}

.page-insights .hero-stats strong {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
  color: var(--color-primary);
}

.page-insights .hero-stats span {
  display: block;
  margin-top: var(--insights-half);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-insights .hero-note {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  border-left: var(--border-thick) solid var(--color-line);
  padding-left: var(--space-2);
  max-width: var(--measure);
}

@media (min-width: 720px) {
  .page-insights .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 区块标题补充 ---------- */
.page-insights .section-head {
  margin-bottom: var(--space-3);
}

.page-insights .topic-count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

/* ---------- 侧边锚点导航 ---------- */
.page-insights .topic-layout {
  margin-top: var(--space-4);
}

.page-insights .topic-nav {
  position: sticky;
  top: var(--insights-topbar);
  border-left: var(--border-thick) solid var(--color-primary);
  padding-left: var(--space-2);
}

.page-insights .topic-nav-title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-2);
}

.page-insights .topic-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--insights-half);
}

.page-insights .topic-nav-list a {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-1);
  border: var(--border-thin) solid transparent;
  border-radius: var(--radius-sm);
  color: var(--color-ink);
  font-size: var(--text-base);
  font-weight: 600;
  text-decoration: none;
  transition: background-color 140ms linear, border-color 140ms linear;
}

.page-insights .topic-nav-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  font-variant-numeric: tabular-nums;
}

.page-insights .topic-nav-list a:hover {
  background-color: var(--color-primary-soft);
  border-color: var(--color-ink);
}

.page-insights .topic-nav-list a[aria-current="true"],
.page-insights .topic-nav-list a[aria-current="page"] {
  border-color: var(--color-primary);
  background-color: var(--color-primary-soft);
  box-shadow: inset 4px 0 0 0 var(--color-primary);
}

.page-insights .topic-nav-list a:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------- 专题流 ---------- */
.page-insights .topic-stream {
  display: grid;
  gap: var(--space-8);
}

.page-insights .topic-block {
  border-top: var(--border-thick) solid var(--color-ink);
  padding-top: var(--space-3);
}

.page-insights .topic-head {
  margin-bottom: var(--space-3);
}

.page-insights .topic-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  font-variant-numeric: tabular-nums;
  color: var(--color-primary);
  letter-spacing: 0.08em;
  margin-bottom: var(--insights-half);
}

.page-insights .topic-head h3 {
  font-family: var(--font-heading);
  font-size: clamp(var(--text-xl), 4vw, var(--text-2xl));
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: 0 0 var(--space-2);
  max-width: 26ch;
}

.page-insights .topic-lead {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  max-width: var(--measure);
  margin: 0;
  border-left: var(--border-thick) solid var(--color-line);
  padding-left: var(--space-2);
}

.page-insights .topic-sub {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-2);
}

/* ---------- 图文非对称栅格 ---------- */
.page-insights .topic-grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-3);
}

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

.page-insights .insight-frame {
  border: var(--border-thick) solid var(--color-ink);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background-color: var(--color-surface-deep);
  aspect-ratio: 4 / 3;
}

.page-insights .insight-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-insights .insight-frame--shot { aspect-ratio: 9 / 7; }
.page-insights .insight-frame--away { aspect-ratio: 5 / 3; }
.page-insights .insight-frame--offside { aspect-ratio: 1 / 1; }
.page-insights .insight-frame--calendar { aspect-ratio: 3 / 1; }

.page-insights .insight-figure .media-caption {
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  max-width: var(--measure);
}

/* ---------- 要点清单 ---------- */
.page-insights .points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-insights .points li {
  border-left: var(--border-thick) solid var(--color-line);
  padding: var(--insights-half) 0 var(--insights-half) var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  transition: border-color 140ms linear, background-color 140ms linear;
}

.page-insights .points li:hover {
  border-left-color: var(--color-primary);
  background-color: var(--color-surface-alt);
}

.page-insights .points strong {
  display: block;
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  margin-bottom: var(--insights-half);
}

/* ---------- 相关条目 ---------- */
.page-insights .topic-related {
  margin-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  padding-top: var(--space-3);
}

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

.page-insights .related-list li {
  display: grid;
  gap: var(--insights-half);
}

.page-insights .related-list a {
  display: inline-block;
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
  border-radius: var(--radius-sm);
}

.page-insights .related-list a:hover {
  color: var(--color-ink);
  background-color: var(--color-primary-soft);
}

.page-insights .related-list a:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

.page-insights .related-list span {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

/* ---------- 延伸入口 ---------- */
.page-insights .relay-list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
  grid-template-columns: 1fr;
}

.page-insights .relay-item a {
  display: grid;
  gap: var(--insights-half);
  height: 100%;
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-3);
  border: var(--border-thick) solid var(--color-ink);
  border-left-width: 6px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--color-ink);
  background-color: var(--color-surface);
  transition: background-color 140ms linear, border-color 140ms linear;
}

.page-insights .relay-item a:hover {
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary);
}

.page-insights .relay-item a:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

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

.page-insights .relay-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
}

.page-insights .relay-desc {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 640px) {
  .page-insights .relay-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-insights .topic-grid--split-right {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-insights .topic-grid--split-left {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-insights .points--three {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-3);
  }

  .page-insights .topic-main--wide {
    margin-top: var(--space-3);
  }

  .page-insights .relay-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 窄屏收口 ---------- */
@media (max-width: 899px) {
  .page-insights .topic-nav {
    position: static;
    border-left: 0;
    border-top: var(--border-thick) solid var(--color-primary);
    padding-left: 0;
    padding-top: var(--space-2);
    margin-bottom: var(--space-4);
  }

  .page-insights .topic-nav-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
  }

  .page-insights .topic-nav-list a {
    border-color: var(--color-line);
  }

  .page-insights .topic-stream {
    gap: var(--space-6);
  }
}

@media (max-width: 639px) {
  .page-insights .insight-frame--calendar {
    aspect-ratio: 2 / 1;
  }

  .page-insights .hero-stats strong {
    font-size: var(--text-xl);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-insights .topic-nav-list a,
  .page-insights .points li,
  .page-insights .relay-item a {
    transition: none;
  }
}