/* ===================================================
   观察专栏 / 长文档页
   作用域：.page-insights
   =================================================== */

.page-insights .cover {
  position: relative;
  overflow: hidden;
  background-color: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-insights .cover__media {
  position: absolute;
  inset: 0;
}

.page-insights .cover__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
}

.page-insights .cover__scrim {
  position: absolute;
  inset: 0;
  display: block;
  background-image: var(--overlay-scrim);
}

.page-insights .cover__inner {
  position: relative;
  z-index: 1;
  padding-block: var(--space-4) var(--space-8);
}

.page-insights .cover__crumb,
.page-insights .cover__crumb a,
.page-insights .cover__crumb .breadcrumb__item {
  color: var(--color-contrast-ink);
  opacity: 0.82;
}

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

.page-insights .cover__lead {
  min-width: 0;
}

.page-insights .cover__title {
  margin: var(--space-3) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.02;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  overflow-wrap: break-word;
}

.page-insights .cover__dek {
  max-width: var(--measure);
  margin: var(--space-4) 0 0;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.88;
}

.page-insights .cover__figures {
  display: grid;
  gap: var(--space-2);
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  align-content: end;
}

.page-insights .figure-box {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
  transition: box-shadow 0.35s ease;
}

.page-insights .figure-box:hover {
  box-shadow: var(--shadow-2);
}

.page-insights .figure-box__num {
  color: var(--color-accent);
  line-height: 1;
}

.page-insights .figure-box__label {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-soft);
}

.page-insights .cover__rail {
  position: relative;
  z-index: 1;
  background-color: var(--color-surface-alt);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-insights .cover__rail-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-4);
  padding-block: var(--space-3);
}

.page-insights .cover__rail-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-insights .cover__rail-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-insights .cover__rail-list a {
  display: inline-block;
  padding: 2px 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-insights .cover__rail-list a:hover,
.page-insights .cover__rail-list a:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ---------- 阅读区 ---------- */

.page-insights .reading {
  padding-block: var(--space-8);
}

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

.page-insights .toc {
  min-width: 0;
  padding: var(--space-3);
  background-color: var(--color-surface-alt);
  border-radius: var(--radius-md);
  box-shadow: inset 0 0 0 var(--border-thin) var(--color-line);
}

.page-insights .toc__label {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}

.page-insights .toc__list {
  display: grid;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-insights .toc__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-2);
  border-left: 2px solid transparent;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--color-ink-soft);
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-insights .toc__link:hover,
.page-insights .toc__link:focus-visible {
  background-color: var(--color-primary-soft);
  border-left-color: var(--color-accent);
  color: var(--color-ink);
}

.page-insights .toc__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-primary);
  padding-top: 3px;
}

.page-insights .toc__text {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.page-insights .toc__title {
  font-size: var(--text-sm);
  line-height: 1.45;
}

.page-insights .toc__desc {
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

.page-insights .toc__note {
  margin: var(--space-3) 0 0;
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-ink-muted);
}

.page-insights .toc__note a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 章节 ---------- */

.page-insights .reading__body {
  min-width: 0;
}

.page-insights .chapter {
  scroll-margin-top: 96px;
  padding-block: var(--space-6);
}

.page-insights .chapter::before {
  content: "";
  display: block;
  height: var(--border-thin);
  width: 100%;
  margin-bottom: var(--space-6);
  background-color: var(--color-line);
}

.page-insights .chapter:first-child::before {
  display: none;
}

.page-insights .chapter__head {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.page-insights .chapter__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-4xl);
  font-weight: var(--weight-body);
  line-height: 0.86;
  letter-spacing: 0.02em;
  color: var(--color-primary);
}

.page-insights .chapter__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-insights .chapter__sub {
  margin: var(--space-4) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-insights .chapter__body {
  display: grid;
  gap: var(--space-4);
  max-width: var(--measure);
  color: var(--color-ink);
  line-height: var(--leading-body);
  font-size: var(--text-base);
}

.page-insights .chapter__body > p {
  margin: 0;
}

/* ---------- 图片 ---------- */

.page-insights .chapter__figure {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

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

.page-insights .chapter__figure--square {
  aspect-ratio: 3 / 2;
}

.page-insights .chapter__figure--wide {
  margin-top: var(--space-6);
  aspect-ratio: 3 / 1;
}

.page-insights .chapter__figure--wide .media-frame__img {
  height: 100%;
}

.page-insights .chapter__figure-caption {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
  background-color: var(--color-surface-alt);
}

/* ---------- 要点框与小结 ---------- */

.page-insights .note {
  padding: var(--space-4);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-left: 3px solid var(--color-contrast-accent);
  border-radius: var(--radius-md);
  box-shadow: 0 0 0 var(--border-thin) var(--color-contrast-line);
}

.page-insights .note__label {
  margin: 0 0 var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-contrast-accent);
}

.page-insights .note p:last-child {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.75;
}

.page-insights .summary {
  display: grid;
  gap: var(--space-1);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-insights .summary__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-accent);
}

.page-insights .summary p:last-child {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
}

/* ---------- 浅色对比章节 ---------- */

.page-insights .chapter--contrast {
  margin-block: var(--space-6);
  padding: var(--space-6) var(--space-4);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-lg);
  box-shadow: 0 0 0 var(--border-thin) var(--color-contrast-line);
}

.page-insights .chapter--contrast.chapter::before {
  display: none;
}

.page-insights .chapter--contrast .chapter__title,
.page-insights .chapter--contrast .chapter__body,
.page-insights .chapter--contrast .chapter__sub,
.page-insights .chapter--contrast .chapter__body > p {
  color: var(--color-contrast-ink);
}

.page-insights .chapter--contrast .chapter__num {
  color: var(--color-contrast-accent);
}

.page-insights .chapter--contrast .summary {
  border-top-color: var(--color-contrast-line);
}

.page-insights .chapter--contrast .summary__label {
  color: var(--color-contrast-accent);
}

.page-insights .chapter--contrast .summary p:last-child {
  color: var(--color-contrast-ink);
}

.page-insights .chapter--contrast .accordion__item {
  border-color: var(--color-contrast-line);
  background-color: transparent;
}

.page-insights .chapter--contrast .accordion__head,
.page-insights .chapter--contrast .accordion__label,
.page-insights .chapter--contrast .accordion__icon,
.page-insights .chapter--contrast .accordion__panel,
.page-insights .chapter--contrast .accordion__panel p {
  color: var(--color-contrast-ink);
}

.page-insights .chapter--contrast .accordion__panel p {
  font-size: var(--text-sm);
  line-height: 1.75;
  margin: 0;
}

/* ---------- 术语表 ---------- */

.page-insights .glossary {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
}

.page-insights .glossary__item {
  padding: var(--space-3);
  background-color: var(--color-surface-alt);
  border-radius: var(--radius-md);
  border-left: 2px solid transparent;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-insights .glossary__item:hover,
.page-insights .glossary__item:focus-within {
  border-left-color: var(--color-accent);
  box-shadow: var(--shadow-1);
}

.page-insights .glossary__term {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  letter-spacing: 0.02em;
  color: var(--color-ink);
}

.page-insights .glossary__def {
  margin: var(--space-1) 0 0;
  font-size: var(--text-sm);
  line-height: 1.72;
  color: var(--color-ink-soft);
}

/* ---------- 延伸阅读 ---------- */

.page-insights .further {
  display: grid;
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
}

.page-insights .further__link {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-4);
  text-decoration: none;
  background-color: var(--color-primary-soft);
  border-radius: var(--radius-md);
  box-shadow: inset 0 0 0 var(--border-thin) transparent;
  transition: box-shadow 0.25s ease, background-color 0.25s ease;
}

.page-insights .further__link:hover,
.page-insights .further__link:focus-visible {
  background-color: var(--color-surface-alt);
  box-shadow: inset 0 0 0 var(--border-thin) var(--color-accent);
}

.page-insights .further__title {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-insights .further__desc {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

/* ---------- 桌面布局 ---------- */

@media (min-width: 720px) {
  .page-insights .cover__inner {
    padding-block: var(--space-6) var(--space-8);
  }

  .page-insights .chapter__head {
    grid-template-columns: minmax(0, 2fr) minmax(0, 10fr);
    align-items: start;
    gap: var(--space-4);
  }

  .page-insights .chapter::before {
    width: 88%;
    margin-left: -8%;
  }

  .page-insights .chapter--contrast {
    padding: var(--space-8) var(--space-6);
  }

  .page-insights .further {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-insights .cover__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: var(--space-8);
  }

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

  .page-insights .reading {
    padding-block: var(--section-y-lg);
  }

  .page-insights .reading__grid {
    grid-template-columns: 272px minmax(0, 1fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-insights .toc {
    position: sticky;
    top: 96px;
  }

  .page-insights .chapter {
    padding-block: var(--space-8);
  }
}
</final>
</final>