.page-insights {
  --insights-rail: 232px;
  --insights-rail-gap: var(--space-6);
  --insights-flow: 46rem;
}

/* ---------- 首屏 ---------- */
.page-insights .insights-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-insights .insights-hero__media {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-insights .insights-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
}

.page-insights .insights-hero__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
}

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

.page-insights .insights-hero__inner .grid {
  row-gap: var(--space-6);
}

.page-insights .insights-hero .kicker {
  color: var(--color-contrast-accent);
  letter-spacing: 0.24em;
}

.page-insights .insights-hero__title {
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  margin-block: var(--space-3) 0;
  color: var(--color-contrast-ink);
  text-wrap: balance;
}

.page-insights .insights-hero__lede {
  margin-top: var(--space-4);
  max-width: 46ch;
  color: color-mix(in srgb, var(--color-contrast-ink) 86%, transparent);
  font-size: var(--text-lg);
  line-height: 1.7;
}

.page-insights .insights-hero__aside {
  border-top: var(--border-thin) solid var(--color-contrast-line);
  padding-top: var(--space-3);
}

.page-insights .insights-hero__aside-title {
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  color: var(--color-contrast-accent);
  margin-bottom: var(--space-3);
}

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

.page-insights .insights-hero__index-item + .insights-hero__index-item {
  border-top: var(--border-thin) dotted var(--color-contrast-line);
  padding-top: var(--space-3);
}

.page-insights .insights-hero__index-link {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num text"
    "num desc";
  column-gap: var(--space-2);
  row-gap: 4px;
  color: var(--color-contrast-ink);
  text-decoration: none;
  min-height: 44px;
}

.page-insights .insights-hero__index-link:hover .insights-hero__index-text,
.page-insights .insights-hero__index-link:focus-visible .insights-hero__index-text {
  color: var(--color-contrast-accent);
}

.page-insights .insights-hero__index-num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  line-height: 1.2;
  color: var(--color-contrast-accent);
}

.page-insights .insights-hero__index-text {
  grid-area: text;
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  transition: color 200ms ease;
}

.page-insights .insights-hero__index-desc {
  grid-area: desc;
  font-size: var(--text-xs);
  line-height: 1.7;
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}

/* ---------- 阅读进度 ---------- */
.page-insights .scroll-progress {
  position: sticky;
  top: 0;
  z-index: 6;
  height: 3px;
  background: color-mix(in srgb, var(--color-line) 60%, transparent);
}

.page-insights .scroll-progress__bar {
  display: block;
  height: 100%;
  width: 0;
  background: var(--color-primary);
}

/* ---------- 长文骨架 ---------- */
.page-insights .insights-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  padding-block: var(--section-y);
}

/* ---------- 目录侧栏 ---------- */
.page-insights .insights-rail {
  min-width: 0;
}

.page-insights .insights-toc {
  padding: var(--space-3);
}

.page-insights .insights-toc .toc__title {
  margin-bottom: var(--space-3);
  letter-spacing: 0.22em;
}

.page-insights .insights-toc__group + .insights-toc__group {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: var(--border-thin) dotted var(--color-contrast-line);
}

.page-insights .insights-toc__group-label {
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-contrast-accent);
  margin-bottom: var(--space-2);
}

.page-insights .insights-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-insights .insights-toc__link {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: 6px 4px;
  font-size: var(--text-sm);
  line-height: 1.5;
  color: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent);
  text-decoration: none;
  border-left: var(--border-thick) solid transparent;
  transition: color 200ms ease, border-color 200ms ease, background-color 200ms ease;
}

.page-insights .insights-toc__link:hover,
.page-insights .insights-toc__link:focus-visible {
  color: var(--color-contrast-ink);
  border-left-color: var(--color-contrast-line);
}

.page-insights .insights-toc__link[aria-current="true"] {
  color: var(--color-contrast-ink);
  border-left-color: var(--color-primary);
  background: color-mix(in srgb, var(--color-primary) 14%, transparent);
}

.page-insights .insights-toc__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-contrast-accent);
  flex: none;
}

/* ---------- 正文流 ---------- */
.page-insights .insights-flow {
  min-width: 0;
  max-width: var(--insights-flow);
}

.page-insights .insights-group-mark {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-lg);
  letter-spacing: 0.18em;
  color: var(--color-ink);
  margin: 0 0 var(--space-6);
  padding-bottom: var(--space-2);
  background-image: repeating-linear-gradient(
    to right,
    var(--color-line) 0 1px,
    transparent 1px 10px
  );
  background-repeat: repeat-x;
  background-position: left bottom;
  background-size: 10px 6px;
}

.page-insights .insights-group-mark__num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  border: var(--border-thin) solid var(--color-primary);
  padding: 1px 7px;
  flex: none;
}

.page-insights .insights-chapter {
  display: flow-root;
  padding-block: var(--space-6);
}

.page-insights .insights-chapter + .insights-chapter {
  margin-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-insights .insights-chapter__head {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.page-insights .insights-chapter__num {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  line-height: 1;
  color: var(--color-primary);
  flex: none;
  letter-spacing: 0.04em;
}

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

.page-insights .insights-chapter__lede {
  font-size: var(--text-lg);
  line-height: 1.7;
  color: var(--color-ink);
  margin: 0 0 var(--space-3);
  padding-left: var(--space-3);
  border-left: var(--border-thick) solid var(--color-primary-soft);
  max-width: var(--measure);
}

.page-insights .insights-prose {
  max-width: var(--measure);
}

.page-insights .insights-prose p {
  margin: 0 0 var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-insights .insights-prose p:last-child {
  margin-bottom: 0;
}

/* ---------- 图片块 ---------- */
.page-insights .insights-figure {
  margin: var(--space-4) 0;
}

.page-insights .insights-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: var(--border-thin) solid var(--color-line);
}

.page-insights .insights-figure__caption {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

/* ---------- 要点框 ---------- */
.page-insights .insights-keybox {
  margin-top: var(--space-6);
  padding: var(--space-4) var(--space-4) var(--space-3);
  background: color-mix(in srgb, var(--color-highlight) 58%, var(--color-surface));
  border-left: 3px solid var(--color-primary);
}

.page-insights .insights-keybox__label {
  font-size: var(--text-xs);
  letter-spacing: 0.24em;
  color: var(--color-primary);
  margin: 0 0 var(--space-2);
}

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

.page-insights .insights-keybox__list li {
  position: relative;
  padding-left: var(--space-3);
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink);
}

.page-insights .insights-keybox__list li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-family: var(--font-mono);
}

.page-insights .insights-keybox__action {
  margin: var(--space-3) 0 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 30%, transparent);
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
}

/* ---------- 收口 ---------- */
.page-insights .insights-outro {
  margin-top: var(--space-8);
}

.page-insights .insights-outro__inner {
  padding: var(--space-6) var(--space-4) var(--space-6);
  border: var(--border-thin) solid var(--color-line);
  border-top: var(--border-thick) double var(--color-line);
  background: var(--color-surface-alt);
}

.page-insights .insights-outro__title {
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: var(--space-2) 0 var(--space-3);
}

.page-insights .insights-outro__text {
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
  margin: 0 0 var(--space-4);
}

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

.page-insights .insights-outro__links li + li {
  border-top: var(--border-thin) dotted var(--color-line);
}

.page-insights .insights-outro__links .link-arrow {
  display: block;
  padding: var(--space-2) 0;
  color: var(--color-ink);
  text-decoration: none;
  font-size: var(--text-sm);
  line-height: 1.7;
  transition: color 200ms ease, padding-left 200ms ease;
}

.page-insights .insights-outro__links .link-arrow:hover,
.page-insights .insights-outro__links .link-arrow:focus-visible {
  color: var(--color-primary);
  padding-left: var(--space-1);
}

.page-insights .insights-outro__contact {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.85;
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.page-insights .insights-outro__contact a {
  color: var(--color-accent);
  text-underline-offset: 3px;
}

/* ---------- 返回顶部 ---------- */
.page-insights .insights-back-top {
  margin-inline: auto;
}

/* ---------- 焦点可见 ---------- */
.page-insights a:focus-visible,
.page-insights button:focus-visible,
.page-insights .toc__link:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 900px) {
  .page-insights .insights-hero__inner {
    padding-block: var(--section-y-lg) var(--section-y);
  }

  .page-insights .insights-layout {
    grid-template-columns: var(--insights-rail) minmax(0, 1fr);
    gap: var(--insights-rail-gap);
    align-items: start;
  }

  .page-insights .insights-rail {
    position: sticky;
    top: var(--space-8);
    align-self: start;
    max-height: calc(100vh - var(--space-8) - var(--space-4));
    overflow-y: auto;
  }

  .page-insights .insights-toc__group + .insights-toc__group {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
  }

  .page-insights .insights-figure--side {
    float: right;
    width: 44%;
    margin: 0 0 var(--space-4) var(--space-4);
  }

  .page-insights .insights-figure--side-left {
    float: left;
    width: 40%;
    margin: 0 var(--space-4) var(--space-4) 0;
  }

  .page-insights .insights-figure--band {
    margin-block: var(--space-6);
  }

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

@media (min-width: 1180px) {
  .page-insights {
    --insights-rail: 248px;
    --insights-rail-gap: var(--space-8);
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-insights .insights-toc__link,
  .page-insights .insights-outro__links .link-arrow,
  .page-insights .insights-hero__index-text {
    transition: none;
  }
}
<<<END>>>