.page-strength {
  --strength-cat-region: var(--color-primary);
  --strength-cat-warranty: var(--color-accent);
  --strength-cat-bulk: var(--color-focus);
  --strength-cat-params: var(--color-ink-muted);
  --strength-inset: 8%;
}

/* ---------- 上下文条 ---------- */
.page-strength .strength-context {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding-block: var(--space-3);
}

.page-strength .strength-context__meta {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

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

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

.page-strength .strength-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-strength .strength-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--overlay-scrim);
}

.page-strength .strength-hero__inner {
  display: grid;
  gap: var(--space-6);
  padding-block: var(--space-8) var(--space-6);
}

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

.page-strength .strength-hero__lede {
  margin: 0;
  max-width: 46ch;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

.page-strength .strength-hero__jump {
  display: inline-block;
  margin-top: var(--space-4);
  padding-bottom: 2px;
  font-size: var(--text-sm);
  color: var(--color-contrast-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid currentColor;
  transition: opacity 180ms ease-out;
}

.page-strength .strength-hero__jump:hover,
.page-strength .strength-hero__jump:focus-visible {
  opacity: 0.72;
}

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

.page-strength .strength-stat {
  padding-top: var(--space-2);
  border-top: 2px solid var(--color-contrast-accent);
}

.page-strength .strength-stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--color-contrast-accent);
}

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

/* ---------- 分类锚点带 ---------- */
.page-strength .strength-jump {
  padding-block: var(--space-4);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-strength .strength-jump__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-strength .strength-jump__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  text-decoration: none;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  transition: color 180ms ease-out, border-color 180ms ease-out, background-color 180ms ease-out;
}

.page-strength .strength-jump__link .mono {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

.page-strength .strength-jump__link:hover,
.page-strength .strength-jump__link:focus-visible {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background-color: var(--color-primary-soft);
}

.page-strength .strength-jump__link:hover .mono,
.page-strength .strength-jump__link:focus-visible .mono {
  color: var(--color-accent);
}

/* ---------- 分组 ---------- */
.page-strength .strength-group {
  scroll-margin-top: var(--space-8);
}

.page-strength .strength-group--region { --cat: var(--strength-cat-region); }
.page-strength .strength-group--warranty { --cat: var(--strength-cat-warranty); }
.page-strength .strength-group--bulk { --cat: var(--strength-cat-bulk); }
.page-strength .strength-group--params { --cat: var(--strength-cat-params); }

.page-strength .group-head {
  display: grid;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding-inline-start: var(--space-3);
  padding-block: var(--space-2);
  border-inline-start: 3px solid var(--cat);
  border-block-start: 2px solid var(--color-ink);
}

.page-strength .group-head__eyebrow {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
  text-transform: uppercase;
}

.page-strength .group-head__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-strength .group-head__lede {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-strength .group-head__lede a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 案例 ---------- */
.page-strength .case-stack {
  display: grid;
  gap: var(--space-4);
}

.page-strength .case-card {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-4);
  padding-inline-start: var(--space-3);
  background-color: var(--color-surface);
  border-inline-start: 3px solid var(--cat);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}

.page-strength .case-card__stat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-strength .case-card__value {
  font-family: var(--font-mono);
  font-size: var(--text-4xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--cat);
}

.page-strength .case-card__unit {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-strength .case-card__body {
  max-width: var(--measure);
}

.page-strength .case-card__title {
  margin: 0 0 var(--space-2);
  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-strength .case-card__row {
  margin: 0 0 var(--space-2);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-strength .case-card__row:last-child {
  margin-bottom: 0;
}

.page-strength .case-card__tag {
  display: inline-block;
  margin-inline-end: var(--space-1);
  padding: 1px var(--space-1);
  border-radius: var(--radius-sm);
  background-color: var(--color-highlight);
  color: var(--color-primary);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
}

/* ---------- 图 ---------- */
.page-strength .strength-figure {
  margin: 0;
}

.page-strength .strength-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}

.page-strength .strength-figure figcaption {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

/* ---------- 常见追问 ---------- */
.page-strength .strength-quick__title {
  margin: 0 0 var(--space-6);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

/* ---------- 收尾 ---------- */
.page-strength .strength-outro__inner {
  display: grid;
  gap: var(--space-6);
}

.page-strength .strength-outro__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  max-width: 26ch;
}

.page-strength .strength-outro__lede {
  margin: 0;
  max-width: 62ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.82;
}

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

.page-strength .strength-outro__link {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3);
  text-decoration: none;
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-md);
  transition: border-color 180ms ease-out, background-color 180ms ease-out;
}

.page-strength .strength-outro__link strong {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-accent);
}

.page-strength .strength-outro__link span {
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

.page-strength .strength-outro__link:hover,
.page-strength .strength-outro__link:focus-visible {
  border-color: var(--color-contrast-accent);
  background-color: rgba(255, 255, 255, 0.04);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 861px) {
  .page-strength .strength-hero__inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: end;
    gap: var(--space-8);
    padding-block: var(--section-y-lg);
  }

  .page-strength .strength-stat:nth-child(2) {
    margin-inline-start: var(--space-4);
  }

  .page-strength .strength-stat:nth-child(3) {
    margin-inline-start: var(--space-8);
  }

  .page-strength .case-card--offset {
    margin-inline-start: var(--strength-inset);
  }

  .page-strength .case-card--offset-lg {
    margin-inline-start: calc(var(--strength-inset) * 1.5);
  }

  .page-strength .case-card--pull {
    margin-inline-end: var(--strength-inset);
  }

  .page-strength .strength-figure--shift-right {
    margin-inline-start: 16%;
  }

  .page-strength .strength-figure--shift-left {
    margin-inline-end: 16%;
  }

  .page-strength .strength-outro__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--gutter);
  }

  .page-strength .strength-outro__title,
  .page-strength .strength-outro__lede {
    grid-column: 1 / -1;
  }
}
<<<END>>>