.page-strength {
  --strength-tint: color-mix(in srgb, var(--color-primary) 9%, transparent);
  --strength-border: color-mix(in srgb, var(--color-line) 62%, transparent);
  --strength-metal: color-mix(in srgb, var(--color-primary) 40%, var(--color-line));
}

/* ---------- 首屏 ---------- */
.page-strength .strength-hero {
  padding-block: var(--space-4) var(--section-y);
}

.page-strength .strength-hero .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  margin: 0 0 var(--space-6);
  padding: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-strength .strength-hero .crumbs li + li::before {
  content: "/";
  margin-right: var(--space-2);
  color: var(--color-line);
}

.page-strength .strength-hero .crumbs a {
  color: var(--color-ink-soft);
  text-decoration: none;
}

.page-strength .strength-hero .crumbs a:hover,
.page-strength .strength-hero .crumbs a:focus-visible {
  color: var(--color-primary);
}

.page-strength .hero__grid {
  display: grid;
  gap: var(--space-6);
  align-items: end;
}

.page-strength .hero__title {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--title-ink);
  margin: var(--space-2) 0 var(--space-3);
  max-width: 14ch;
}

.page-strength .hero__sub {
  max-width: var(--measure);
  color: var(--color-ink-soft);
  margin: 0;
}

.page-strength .hero__figures {
  padding: var(--space-4) var(--space-3);
  display: grid;
  gap: var(--space-4);
  border-radius: var(--radius-md);
}

.page-strength .hero__figures-cap {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-ink);
  opacity: 0.62;
}

.page-strength .fig {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-strength .fig__num {
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-contrast-accent);
  letter-spacing: -0.01em;
}

.page-strength .fig__label {
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  letter-spacing: 0.02em;
}

.page-strength .hero__media {
  margin: var(--space-6) 0 0;
  border: var(--border-thin) solid var(--strength-metal);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-strength .hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

/* ---------- 方向分区 ---------- */
.page-strength .direction {
  padding-block: var(--section-y);
}

.page-strength .direction--alt {
  background-color: var(--color-surface-alt);
}

.page-strength .direction--tint {
  background-color: color-mix(in srgb, var(--color-primary-soft) 74%, var(--color-surface));
}

.page-strength .direction__rule {
  display: block;
  width: 100%;
  height: var(--border-thin);
  background-color: var(--strength-metal);
  margin-bottom: var(--space-6);
}

.page-strength .direction__head {
  display: grid;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

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

.page-strength .direction__kicker {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-primary);
}

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

.page-strength .direction__context {
  margin: 0;
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-strength .direction__figure {
  margin: 0;
  border: var(--border-thin) solid var(--strength-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-surface-deep);
}

.page-strength .direction__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.page-strength .direction__cases {
  display: grid;
  gap: var(--space-6);
}

/* ---------- 实证条目 ---------- */
.page-strength .case-item {
  position: relative;
  padding: var(--space-4) var(--space-3) var(--space-4) var(--space-4);
  border-left: var(--border-thin) solid var(--strength-border);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  transition: border-color 220ms ease, background-color 220ms ease, transform 220ms ease;
}

.page-strength .case-item:hover,
.page-strength .case-item:focus-within {
  border-left-color: var(--color-accent);
  background-color: var(--strength-tint);
  transform: translateX(2px);
}

.page-strength .case-item__head {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.page-strength .case-item__no {
  font-size: var(--text-lg);
  color: var(--color-primary);
  letter-spacing: 0.04em;
  line-height: 1;
}

.page-strength .case-item__tag {
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
  border: var(--border-thin) solid var(--strength-border);
  border-radius: var(--radius-sm);
  padding: 3px var(--space-1);
  white-space: nowrap;
}

.page-strength .case-item__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--title-ink);
  margin: 0 0 var(--space-3);
  max-width: 26ch;
}

.page-strength .case-item__facts {
  margin: 0;
  display: grid;
  gap: var(--space-3);
}

.page-strength .fact {
  display: grid;
  gap: var(--space-1);
}

.page-strength .fact dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}

.page-strength .fact dd {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-strength .fact--result dd {
  color: var(--color-ink);
  background-color: color-mix(in srgb, var(--color-highlight) 62%, transparent);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
}

.page-strength .mark-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--color-accent);
  margin-right: var(--space-1);
  vertical-align: 0.12em;
}

.page-strength .case-item__cycle {
  margin: var(--space-3) 0 0;
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

/* ---------- 术语 ---------- */
.page-strength .terms {
  padding-block: var(--section-y);
}

.page-strength .terms__head {
  max-width: var(--measure);
  margin-bottom: var(--space-6);
}

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

.page-strength .terms__intro {
  margin: 0;
  color: var(--color-ink-soft);
}

.page-strength .terms__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
  border-top: var(--border-thin) solid var(--strength-metal);
  padding-top: var(--space-4);
}

.page-strength .term {
  border-bottom: var(--border-thin) solid var(--strength-border);
}

.page-strength .term__toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-2);
  background: none;
  border: 0;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: left;
  color: var(--color-ink);
  font-family: inherit;
  transition: background-color 200ms ease, color 200ms ease;
}

.page-strength .term__toggle:hover,
.page-strength .term__toggle:focus-visible {
  background-color: var(--strength-tint);
  color: var(--title-ink);
}

.page-strength .term__name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
  color: var(--title-ink);
}

.page-strength .term .panel-toggle__hint {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-primary);
}

.page-strength .term__body {
  padding: 0 var(--space-2) var(--space-4);
}

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

/* ---------- 下一步 ---------- */
.page-strength .nextstep {
  padding-block: var(--section-y-lg);
  background-color: var(--color-surface-deep);
}

.page-strength .next__grid {
  display: grid;
  gap: var(--space-6);
  align-items: start;
}

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

.page-strength .next__lead {
  margin: 0 0 var(--space-4);
  max-width: var(--measure);
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-strength .next__links {
  list-style: none;
  margin: 0 0 var(--space-4);
  padding: 0;
  display: grid;
  gap: var(--space-2);
  border-top: var(--border-thin) solid var(--strength-metal);
  padding-top: var(--space-3);
}

.page-strength .next__links a.link-arrow {
  display: inline-block;
  padding: var(--space-2) 0;
  font-size: var(--text-lg);
  font-family: var(--font-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--title-ink);
  text-decoration: none;
  transition: color 200ms ease, transform 200ms ease;
}

.page-strength .next__links a.link-arrow::after {
  content: "→";
  margin-left: var(--space-2);
  color: var(--color-accent);
  transition: transform 200ms ease;
  display: inline-block;
}

.page-strength .next__links a.link-arrow:hover,
.page-strength .next__links a.link-arrow:focus-visible {
  color: var(--color-primary);
}

.page-strength .next__links a.link-arrow:hover::after {
  transform: translateX(4px);
}

.page-strength .next__note {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

.page-strength .next__note a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.page-strength .next__note a:hover,
.page-strength .next__note a:focus-visible {
  color: var(--color-focus);
}

.page-strength .next__figure {
  margin: 0;
  border: var(--border-thin) solid var(--strength-metal);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-surface-alt);
}

.page-strength .next__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-strength .hero__figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-5, 40px);
  }

  .page-strength .fig {
    border-top: 0;
    border-left: var(--border-thin) solid var(--color-contrast-line);
    padding-top: 0;
    padding-left: var(--space-3);
  }

  .page-strength .fig:first-of-type {
    border-left: 0;
    padding-left: 0;
  }

  .page-strength .direction__cases {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-8);
  }
}

@media (min-width: 960px) {
  .page-strength .strength-hero {
    padding-block: var(--space-6) var(--section-y-lg);
  }

  .page-strength .hero__grid {
    grid-template-columns: 7fr 4fr;
    gap: var(--space-8);
  }

  .page-strength .direction__head {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: end;
    gap: var(--space-8);
  }

  .page-strength .direction__head--solo {
    grid-template-columns: minmax(0, 8fr) minmax(0, 3fr);
  }

  .page-strength .direction__figure {
    justify-self: end;
    width: 100%;
  }

  .page-strength .next__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: var(--space-8);
  }

  .page-strength .next__figure {
    align-self: stretch;
  }

  .page-strength .next__figure img {
    height: 100%;
    aspect-ratio: auto;
  }
}

@media (min-width: 1180px) {
  .page-strength .direction__title {
    font-size: var(--text-3xl);
  }

  .page-strength .case-item {
    padding-right: var(--space-4);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-strength .case-item,
  .page-strength .next__links a.link-arrow,
  .page-strength .next__links a.link-arrow::after,
  .page-strength .term__toggle {
    transition: none;
  }

  .page-strength .case-item:hover,
  .page-strength .case-item:focus-within {
    transform: none;
  }

  .page-strength .next__links a.link-arrow:hover::after {
    transform: none;
  }
}
<<<END>>>

.page-strength {
  --space-5: var(--space-8);
}