.page-insights-trend {
  --trend-dash: color-mix(in srgb, var(--color-line) 92%, transparent);
  --trend-glass: color-mix(in srgb, var(--color-contrast-ink) 7%, transparent);
  --trend-indent: clamp(0px, 2.2vw, 34px);
}

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

/* ---------- 面包屑 ---------- */
.page-insights-trend .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-insights-trend .breadcrumb a {
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: 1px dotted var(--color-line);
}

.page-insights-trend .breadcrumb a:hover,
.page-insights-trend .breadcrumb a:focus-visible {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.page-insights-trend .breadcrumb__sep {
  color: var(--color-line);
}

/* ---------- 固定返回锚点 ---------- */
.page-insights-trend .trend-return {
  display: none;
}

@media (min-width: 1400px) {
  .page-insights-trend .trend-return {
    display: inline-flex;
    align-items: center;
    position: fixed;
    top: calc(var(--space-8) + var(--space-6));
    right: var(--space-3);
    z-index: 4;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    color: var(--color-primary);
    background: var(--color-primary-soft);
    border: var(--border-thin) dashed var(--color-primary);
    border-radius: var(--radius-pill);
    text-decoration: none;
    transition: background-color 180ms ease, color 180ms ease;
  }

  .page-insights-trend .trend-return:hover,
  .page-insights-trend .trend-return:focus-visible {
    background: var(--color-primary);
    color: var(--color-primary-ink);
  }
}

/* ---------- 首屏 ---------- */
.page-insights-trend .section.trend-intro {
  padding-top: var(--space-6);
  padding-bottom: var(--section-y);
}

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

@media (min-width: 768px) {
  .page-insights-trend .trend-intro__inner {
    grid-template-columns: 7fr 5fr;
    align-items: center;
    gap: var(--space-8);
  }
}

.page-insights-trend .eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin: 0 0 var(--space-2);
}

.page-insights-trend h1 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(var(--text-2xl), 6vw, var(--text-4xl));
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

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

.page-insights-trend .trend-figures {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-6);
  margin: var(--space-6) 0 0;
}

.page-insights-trend .trend-figures .figure__value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  color: var(--color-accent);
  letter-spacing: -0.02em;
}

.page-insights-trend .trend-figures .figure__label {
  display: block;
  margin-top: var(--space-1);
  max-width: 18ch;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

/* ---------- 图片 ---------- */
.page-insights-trend .trend-media {
  margin: 0;
}

.page-insights-trend .trend-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--radius-lg);
  border: var(--border-thin) solid var(--color-line);
  box-shadow: var(--shadow-1);
  object-fit: cover;
  background: var(--color-surface-deep);
}

.page-insights-trend .trend-intro__media img {
  aspect-ratio: 3 / 2;
}

.page-insights-trend .trend-changes__media img {
  aspect-ratio: 2 / 1;
}

.page-insights-trend .trend-keep__media img {
  aspect-ratio: 1 / 1;
}

.page-insights-trend .trend-media figcaption {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-ink-muted);
}

/* ---------- 定位区块 ---------- */
.page-insights-trend .trend-scope__grid {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 900px) {
  .page-insights-trend .trend-scope__grid {
    grid-template-columns: 6fr 6fr;
    align-items: start;
    gap: var(--space-8);
  }
}

.page-insights-trend .section-title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(var(--text-xl), 3.4vw, var(--text-3xl));
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-insights-trend .section-lead {
  margin: var(--space-2) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-insights-trend .panel {
  padding: var(--space-4);
  border: var(--border-thin) dashed var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
}

.page-insights-trend .trend-scope__kicker {
  margin: 0 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

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

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

.page-insights-trend .trend-scope__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: var(--space-2);
  border-top: 1px dashed var(--color-accent);
}

.page-insights-trend .trend-scope__note {
  margin: var(--space-3) 0 0;
  padding-top: var(--space-3);
  border-top: 1px dotted var(--trend-dash);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 变化维度 ---------- */
.page-insights-trend .section-head {
  max-width: var(--measure);
}

.page-insights-trend .change-grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

@media (min-width: 768px) {
  .page-insights-trend .change-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-6);
  }
}

.page-insights-trend .change-group {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
}

.page-insights-trend .change-group--a {
  border: var(--border-thin) solid var(--color-line);
}

.page-insights-trend .change-group--b {
  border: var(--border-thin) dashed var(--color-accent);
}

.page-insights-trend .change-group__label {
  margin: 0 0 var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-insights-trend .change-group__title {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-insights-trend .change-group--b .change-group__title {
  color: var(--color-accent);
}

.page-insights-trend .change-list {
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-3);
  counter-reset: change;
}

.page-insights-trend .change-list li {
  position: relative;
  padding-top: var(--space-3);
  padding-left: var(--space-4);
  border-top: 1px dotted var(--trend-dash);
}

.page-insights-trend .change-list li:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-insights-trend .change-list li::before {
  counter-increment: change;
  content: counter(change, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: calc(var(--space-3) + 0.28em);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
}

.page-insights-trend .change-list li:first-child::before {
  top: 0.28em;
}

.page-insights-trend .change-item__title {
  margin: 0;
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-insights-trend .change-item__desc {
  margin: var(--space-1) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-insights-trend .trend-changes__media {
  margin-top: var(--space-6);
}

/* ---------- 纵向阶梯 ---------- */
.page-insights-trend .trend-ladder {
  color: var(--color-contrast-ink);
}

.page-insights-trend .trend-ladder .eyebrow {
  color: var(--color-contrast-accent);
}

.page-insights-trend .trend-ladder .section-title {
  color: var(--color-contrast-ink);
}

.page-insights-trend .trend-ladder .section-lead {
  color: color-mix(in srgb, var(--color-contrast-ink) 74%, transparent);
}

.page-insights-trend .ladder {
  margin: var(--space-6) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-4);
}

.page-insights-trend .ladder__step {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-3);
  border: 1px dashed var(--color-contrast-line);
  border-radius: var(--radius-lg);
  background: var(--trend-glass);
  transition: border-color 200ms ease, background-color 200ms ease;
}

.page-insights-trend .ladder__step:nth-child(2) {
  margin-left: var(--trend-indent);
}

.page-insights-trend .ladder__step:nth-child(3) {
  margin-left: calc(var(--trend-indent) * 2);
}

.page-insights-trend .ladder__step:nth-child(4) {
  margin-left: calc(var(--trend-indent) * 3);
}

.page-insights-trend .ladder__step::after {
  content: "";
  position: absolute;
  left: calc(var(--space-3) + 12px);
  top: 100%;
  height: var(--space-4);
  border-left: 1px dashed var(--color-contrast-line);
}

.page-insights-trend .ladder__step:last-child::after {
  display: none;
}

.page-insights-trend .ladder__step:hover,
.page-insights-trend .ladder__step:focus-visible {
  outline: none;
  border-color: var(--color-contrast-accent);
  background: color-mix(in srgb, var(--color-contrast-accent) 12%, transparent);
}

.page-insights-trend .ladder__step:focus-visible {
  box-shadow: 0 0 0 2px var(--color-focus);
}

.page-insights-trend .ladder__index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-pill);
  border: 1px dashed var(--color-contrast-accent);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-contrast-accent);
}

.page-insights-trend .ladder__title {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}

.page-insights-trend .ladder__meta {
  margin: var(--space-2) 0 0;
  display: grid;
  gap: 6px;
}

.page-insights-trend .ladder__meta > div {
  display: grid;
  grid-template-columns: 5.4em minmax(0, 1fr);
  gap: var(--space-2);
  align-items: baseline;
}

.page-insights-trend .ladder__meta dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-contrast-accent);
}

.page-insights-trend .ladder__meta dd {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: color-mix(in srgb, var(--color-contrast-ink) 86%, transparent);
}

/* ---------- 沿用边界 ---------- */
.page-insights-trend .trend-keep__grid {
  display: grid;
  gap: var(--space-6);
}

@media (min-width: 900px) {
  .page-insights-trend .trend-keep__grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
    gap: var(--space-8);
  }
}

.page-insights-trend .trend-keep__media {
  margin-top: var(--space-6);
}

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

.page-insights-trend .checklist__item {
  position: relative;
}

.page-insights-trend .checklist__input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.page-insights-trend .checklist__label {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  align-items: start;
  padding: var(--space-3);
  border: var(--border-thin) dashed var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  cursor: pointer;
  transition: border-color 180ms ease, background-color 180ms ease;
}

.page-insights-trend .checklist__label:hover {
  border-color: var(--color-accent);
}

.page-insights-trend .checklist__input:focus-visible + .checklist__label {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-insights-trend .checklist__input:checked + .checklist__label {
  background: var(--color-highlight);
  border-color: var(--color-accent);
}

.page-insights-trend .checklist__box {
  position: relative;
  width: 26px;
  height: 26px;
  border: 1px dashed var(--color-line);
  border-radius: calc(var(--radius-sm) / 1.6);
  background: var(--color-surface);
  transition: background-color 160ms ease, border-color 160ms ease;
}

.page-insights-trend .checklist__input:checked + .checklist__label .checklist__box {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.page-insights-trend .checklist__input:checked + .checklist__label .checklist__box::after {
  content: "";
  position: absolute;
  left: 9px;
  top: 4px;
  width: 6px;
  height: 12px;
  border-right: 2px solid var(--color-accent-ink);
  border-bottom: 2px solid var(--color-accent-ink);
  transform: rotate(40deg);
}

.page-insights-trend .checklist__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) var(--space-2);
}

.page-insights-trend .checklist__title {
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-insights-trend .checklist__desc {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-insights-trend .tag {
  display: inline-flex;
  align-items: center;
  padding: 2px var(--space-2);
  border-radius: var(--radius-pill);
  background: var(--color-surface-deep);
  color: var(--color-ink-soft);
  font-size: var(--text-xs);
  line-height: 1.6;
  white-space: nowrap;
}

.page-insights-trend .tag--accent {
  background: var(--color-highlight);
  color: var(--color-accent);
}

.page-insights-trend .checklist__foot {
  margin: var(--space-3) 0 0;
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-ink-muted);
}

/* ---------- 相邻入口 ---------- */
.page-insights-trend .next-list {
  margin: var(--space-6) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-3);
}

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

@media (min-width: 1024px) {
  .page-insights-trend .next-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-insights-trend .next-list__link {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  height: 100%;
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface-alt);
  text-decoration: none;
  transition: border-color 180ms ease, background-color 180ms ease, transform 180ms ease;
}

.page-insights-trend .next-list__link:hover,
.page-insights-trend .next-list__link:focus-visible {
  border-color: var(--color-accent);
  background: var(--color-primary-soft);
  transform: translateY(-2px);
}

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

.page-insights-trend .next-list__title {
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

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

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-insights-trend .next-list__link,
  .page-insights-trend .ladder__step,
  .page-insights-trend .checklist__label,
  .page-insights-trend .trend-return {
    transition: none;
    transform: none;
  }
}