.page-cases {
  --cs-rail: 96px;
  display: block;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 共享式基础件（页面作用域内） ---------- */
.page-cases .cs-section {
  padding: var(--section-y) 0;
}

.page-cases .cs-section--lg {
  padding: var(--section-y-lg) 0;
}

.page-cases .cs-section__head {
  max-width: var(--measure);
  margin: 0 0 var(--space-6);
}

.page-cases .cs-section__title {
  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);
  margin: var(--space-2) 0 0;
}

.page-cases .cs-section__lead {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: var(--space-3) 0 0;
}

.page-cases .cs-section__head--dark .cs-section__title {
  color: var(--color-contrast-ink);
}

.page-cases .cs-section__head--dark .cs-section__lead {
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent);
}

.page-cases .media-frame {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  background: var(--color-surface-deep);
  border-radius: var(--radius-sm);
  border: var(--border-thin) solid var(--color-line);
}

.page-cases .media-frame__img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-cases .media-frame__scrim {
  position: absolute;
  inset: 0;
  display: block;
  background: var(--overlay-scrim);
  opacity: 0.55;
  pointer-events: none;
}

.page-cases .media-frame__caption {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--color-contrast-ink);
  background: color-mix(in srgb, var(--color-contrast-surface) 82%, transparent);
}

/* ---------- 首屏 ---------- */
.page-cases .cs-hero {
  position: relative;
  padding: calc(var(--space-8) * 2) 0 var(--section-y);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-cases .cs-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-cases .cs-hero__copy {
  min-width: 0;
}

.page-cases .cs-hero__title {
  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);
  margin: var(--space-3) 0 0;
  max-width: 14ch;
}

.page-cases .cs-hero__lead {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 80%, transparent);
  margin: var(--space-4) 0 0;
  max-width: 46ch;
}

.page-cases .cs-hero__media {
  min-width: 0;
}

.page-cases .cs-hero__frame {
  height: 100%;
  min-height: 240px;
  border-color: var(--color-contrast-line);
  background: var(--color-contrast-line);
}

.page-cases .cs-hero__ruler {
  display: none;
}

.page-cases .cs-ruler {
  width: 40px;
  height: 480px;
  overflow: visible;
}

.page-cases .cs-ruler__spine {
  stroke: var(--color-contrast-line);
  stroke-width: 1;
}

.page-cases .cs-ruler__tick {
  stroke: var(--color-contrast-accent);
  stroke-width: 1;
}

.page-cases .cs-ruler__num {
  font-family: var(--font-mono);
  font-size: 15px;
  fill: color-mix(in srgb, var(--color-contrast-ink) 72%, transparent);
}

.page-cases .cs-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-cases .cs-hero__stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  min-width: 0;
  padding: var(--space-2);
}

.page-cases .cs-hero__stat .figure__value {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-contrast-accent);
}

.page-cases .cs-hero__stat .figure__unit {
  font-size: var(--text-sm);
  line-height: 1.4;
  color: color-mix(in srgb, var(--color-contrast-ink) 74%, transparent);
}

.page-cases .cs-hero__stat--accent {
  background: var(--color-accent);
}

.page-cases .cs-hero__stat--accent .figure__value,
.page-cases .cs-hero__stat--accent .figure__unit {
  color: var(--color-accent-ink);
}

/* ---------- 能力总览 ---------- */
.page-cases .cs-ov__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-cases .cs-ov__fig {
  min-height: 200px;
}

.page-cases .cs-ov__fig .media-frame__img {
  aspect-ratio: 1000 / 600;
}

.page-cases .cs-ov__list {
  min-width: 0;
  display: grid;
  gap: 0;
}

.page-cases .cs-ov__row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: var(--space-1) var(--space-3);
  padding: var(--space-3) 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-cases .cs-ov__row:last-child {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-cases .cs-ov__no {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1.6;
  color: var(--color-primary);
}

.page-cases .cs-ov__name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.3;
  color: var(--color-ink);
}

.page-cases .cs-ov__def {
  grid-column: 2;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

/* ---------- 逐项能力 ---------- */
.page-cases .cs-caps__stack {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-cases .cs-cap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-6) 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-cases .cs-cap:last-child {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-cases .cs-cap__no {
  display: inline-block;
  align-self: start;
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--color-primary);
  text-decoration: none;
  padding: 0 var(--space-1);
  transition: background-color 150ms ease, color 150ms ease;
}

.page-cases .cs-cap__no:hover {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-cases .cs-cap__no[aria-current="location"] {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-cases .cs-cap__no:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 3px;
}

.page-cases .cs-cap__body {
  min-width: 0;
}

.page-cases .cs-cap__name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: 0;
}

.page-cases .cs-cap__def {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  margin: var(--space-2) 0 0;
  max-width: 56ch;
}

.page-cases .cs-cap__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.page-cases .cs-cap__block {
  border-top: var(--border-thin) solid var(--color-line);
  padding-top: var(--space-2);
}

.page-cases .cs-cap__block--ok {
  border-top-color: var(--color-primary);
}

.page-cases .cs-cap__block--no {
  border-top-color: var(--color-accent);
}

.page-cases .cs-cap__block-title {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-2);
}

.page-cases .cs-cap__block p {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
  margin: 0;
}

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

.page-cases .cs-cap__ul li {
  position: relative;
  padding-left: var(--space-3);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.page-cases .cs-cap__ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: var(--border-thin);
  background: var(--color-ink-muted);
}

.page-cases .cs-cap__more {
  margin: var(--space-3) 0 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-muted);
}

.page-cases .cs-cap__more a,
.page-cases .cs-cta__note a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) solid currentColor;
}

.page-cases .cs-cap__more a:hover,
.page-cases .cs-cta__note a:hover {
  background: var(--color-primary-soft);
}

.page-cases .cs-cap__more a:focus-visible,
.page-cases .cs-cta__note a:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 2px;
}

/* ---------- 覆盖边界 ---------- */
.page-cases .cs-bounds {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: var(--section-y-lg) 0;
}

.page-cases .cs-bounds__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-cases .cs-bounds__col-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
  margin: 0 0 var(--space-2);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thick) solid var(--color-contrast-accent);
}

.page-cases .cs-bounds__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-cases .cs-bounds__item {
  padding: var(--space-3) var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
  font-size: var(--text-sm);
  line-height: 1.75;
  color: color-mix(in srgb, var(--color-contrast-ink) 84%, transparent);
  transition: background-color 150ms ease, color 150ms ease;
}

.page-cases .cs-bounds__item:hover {
  background: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
}

.page-cases .cs-bounds__fig {
  border-color: var(--color-contrast-line);
  background: var(--color-contrast-line);
}

.page-cases .cs-bounds__fig .media-frame__img {
  aspect-ratio: 800 / 800;
}

/* ---------- 交付标准 ---------- */
.page-cases .cs-deliver__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-cases .cs-deliver__list {
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: 0;
}

.page-cases .cs-deliver__row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: var(--space-1) var(--space-2);
  align-items: baseline;
  padding: var(--space-3) 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-cases .cs-deliver__row:last-child {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-cases .cs-deliver__no {
  grid-row: span 3;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-muted);
}

.page-cases .cs-deliver__name {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-cases .cs-deliver__out {
  grid-column: 2;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.page-cases .cs-deliver__check {
  grid-column: 2;
  justify-self: start;
  margin-top: var(--space-1);
  padding: 2px var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-cases .cs-deliver__fig .media-frame__img {
  aspect-ratio: 900 / 600;
}

/* ---------- 服务清单 ---------- */
.page-cases .cs-svc {
  background: var(--color-surface-alt);
}

.page-cases .cs-svc__wrap {
  counter-reset: svc;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-cases .cs-svc__group {
  min-width: 0;
}

.page-cases .cs-svc__group-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  margin: 0 0 var(--space-2);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thick) solid var(--color-primary);
}

.page-cases .cs-svc__group-count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-cases .cs-svc__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-cases .cs-svc__item {
  counter-increment: svc;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: var(--space-1) var(--space-2);
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-cases .cs-svc__item::before {
  content: counter(svc, decimal-leading-zero);
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  line-height: 1.9;
  color: var(--color-accent);
}

.page-cases .cs-svc__name {
  font-size: var(--text-base);
  font-weight: 500;
  line-height: 1.5;
  color: var(--color-ink);
}

.page-cases .cs-svc__meta {
  grid-column: 2;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

/* ---------- 实践片段 ---------- */
.page-cases .cs-stories__fig {
  margin-bottom: var(--space-6);
}

.page-cases .cs-stories__fig .media-frame__img {
  aspect-ratio: 1100 / 700;
}

.page-cases .cs-stories__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-cases .cs-story {
  min-width: 0;
  padding-top: var(--space-3);
  border-top: var(--border-thick) solid var(--color-ink);
}

.page-cases .cs-story__scene {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin: 0;
}

.page-cases .cs-story__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
  margin: var(--space-2) 0 var(--space-3);
}

.page-cases .cs-story__dl {
  margin: 0;
}

.page-cases .cs-story__row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: var(--space-1) var(--space-2);
  padding: var(--space-2) 0;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-cases .cs-story__row dt {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  padding-top: 0.35em;
}

.page-cases .cs-story__row dd {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
}

/* ---------- 行动出口 ---------- */
.page-cases .cs-cta {
  padding: var(--section-y) 0;
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-cases .cs-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-cases .cs-cta .eyebrow {
  color: color-mix(in srgb, var(--color-accent-ink) 82%, transparent);
}

.page-cases .cs-cta__title {
  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-accent-ink);
  margin: var(--space-2) 0 0;
  max-width: 20ch;
}

.page-cases .cs-cta__text {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-accent-ink) 92%, transparent);
  margin: var(--space-3) 0 0;
  max-width: 62ch;
}

.page-cases .cs-cta__actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
  min-width: 0;
}

.page-cases .cs-cta .btn {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1.4;
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: var(--border-thick) solid transparent;
  transition: background-color 150ms ease, color 150ms ease;
}

.page-cases .cs-cta .btn--primary {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-cases .cs-cta .btn--primary:hover {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-cases .cs-cta .btn--ghost {
  border-color: var(--color-accent-ink);
  color: var(--color-accent-ink);
}

.page-cases .cs-cta .btn--ghost:hover {
  background: var(--color-accent-ink);
  color: var(--color-accent);
}

.page-cases .cs-cta .btn:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 3px;
}

.page-cases .cs-cta__note {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.75;
  color: color-mix(in srgb, var(--color-accent-ink) 88%, transparent);
  max-width: 56ch;
}

.page-cases .cs-cta__note a {
  color: var(--color-accent-ink);
  text-decoration: none;
  border-bottom: var(--border-thin) solid currentColor;
}

.page-cases .cs-cta__note a:hover {
  background: color-mix(in srgb, var(--color-accent-ink) 22%, transparent);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-cases .cs-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-cases .cs-bounds__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-cases .cs-bounds__fig {
    grid-column: 1 / -1;
  }

  .page-cases .cs-svc__wrap {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-6) var(--space-4);
  }

  .page-cases .cs-stories__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-cases .cs-hero__inner {
    grid-template-columns: minmax(0, 6.5fr) minmax(0, 4fr) 76px;
    grid-template-areas:
      "copy media ruler"
      "stats media ruler";
    column-gap: var(--space-4);
    row-gap: var(--space-6);
    align-items: start;
  }

  .page-cases .cs-hero__copy {
    grid-area: copy;
  }

  .page-cases .cs-hero__media {
    grid-area: media;
    align-self: stretch;
  }

  .page-cases .cs-hero__stats {
    grid-area: stats;
  }

  .page-cases .cs-hero__ruler {
    grid-area: ruler;
    display: flex;
    align-items: center;
    justify-content: center;
    align-self: stretch;
  }

  .page-cases .cs-ov__body {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    column-gap: var(--space-6);
    align-items: start;
  }

  .page-cases .cs-cap {
    grid-template-columns: var(--cs-rail) minmax(0, 1fr);
    column-gap: var(--space-4);
  }

  .page-cases .cs-cap__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1fr);
    column-gap: var(--space-4);
  }

  .page-cases .cs-bounds__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 4fr) minmax(0, 3fr);
    column-gap: var(--space-6);
    align-items: start;
  }

  .page-cases .cs-bounds__fig {
    grid-column: auto;
  }

  .page-cases .cs-deliver__layout {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    column-gap: var(--space-6);
    align-items: start;
  }

  .page-cases .cs-deliver__row {
    grid-template-columns: 48px 160px minmax(0, 1fr) auto;
    gap: var(--space-3);
    align-items: baseline;
  }

  .page-cases .cs-deliver__no {
    grid-row: auto;
  }

  .page-cases .cs-deliver__out,
  .page-cases .cs-deliver__check {
    grid-column: auto;
  }

  .page-cases .cs-deliver__check {
    margin-top: 0;
    justify-self: end;
    white-space: nowrap;
  }

  .page-cases .cs-svc__wrap {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-cases .cs-stories__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-cases .cs-cta__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: var(--space-6);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-cases .cs-hero__title {
    max-width: 12ch;
  }
}