.page-cases {
  --cases-figure-size: calc(var(--text-figure) * 1.32);
  --cases-hair: calc(var(--border-thin) * 4);
  --cases-fret: calc(var(--border-thin) * 4);
}

/* ---------- 首屏 ---------- */
.page-cases .cases-hero {
  position: relative;
  overflow: hidden;
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block: var(--space-6) var(--space-8);
  border-block-end: var(--cases-hair) double var(--color-contrast-line);
}

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

.page-cases .cases-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}

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

.page-cases .cases-hero__inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.page-cases .cases-hero .crumb {
  justify-content: center;
  flex-wrap: wrap;
  margin-block-end: var(--space-6);
  color: var(--color-contrast-ink);
  opacity: 0.74;
  font-size: var(--text-sm);
}

.page-cases .cases-hero .crumb a {
  color: var(--color-contrast-ink);
  text-decoration: none;
  border-block-end: var(--border-thin) solid var(--color-contrast-line);
  padding-block-end: 1px;
}

.page-cases .cases-hero .crumb a:hover,
.page-cases .cases-hero .crumb a:focus-visible {
  border-block-end-color: var(--color-contrast-accent);
  color: var(--color-contrast-accent);
}

.page-cases .cases-hero__sup {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.32em;
  color: var(--color-contrast-accent);
}

.page-cases .cases-hero__title {
  margin: 0;
  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);
}

.page-cases .cases-hero__lead {
  max-width: var(--measure);
  margin: var(--space-4) auto 0;
  font-family: var(--font-body);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.86;
  text-align: left;
}

.page-cases .cases-figures {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-block-start: var(--space-8);
  text-align: center;
}

.page-cases .cases-fig__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--cases-figure-size);
  line-height: 0.86;
  letter-spacing: 0.02em;
  color: var(--color-contrast-accent);
  font-variant-numeric: tabular-nums;
}

.page-cases .cases-fig__label {
  display: block;
  margin-block-start: var(--space-2);
  font-size: var(--text-sm);
  letter-spacing: 0.16em;
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

/* ---------- 章节头 ---------- */
.page-cases .cases-head {
  display: grid;
  gap: var(--space-2);
  justify-items: center;
  text-align: center;
  margin-block-end: var(--space-6);
  padding-block-end: var(--space-4);
  border-block-end: var(--cases-hair) double var(--color-line);
}

.page-cases .cases-head--deep {
  border-block-end-color: var(--color-contrast-line);
}

.page-cases .cases-head .section-head__index,
.page-cases .cases-head .section-head__title {
  margin: 0;
}

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

.page-cases .cases-head--deep .cases-head__note {
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

/* ---------- 筛选 ---------- */
.page-cases .cases-filter {
  margin-block-end: var(--space-2);
}

.page-cases .cases-filter .filter-btn {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  padding: var(--space-1) var(--space-2);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-surface-alt);
  color: var(--color-ink);
  cursor: pointer;
  transition: background 200ms ease, color 200ms ease, border-color 200ms ease;
}

.page-cases .cases-filter .filter-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.page-cases .cases-filter .filter-btn[aria-pressed="true"] {
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.page-cases .cases-filter .filter-btn:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 2px;
}

.page-cases .cases-filter__status {
  margin-block: 0 var(--space-6);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

/* ---------- 条目目录 ---------- */
.page-cases .cases-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.page-cases .cases-item {
  position: relative;
  padding: var(--space-4) var(--space-3) var(--space-3) var(--space-4);
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface-alt);
  transition: background 220ms ease, border-color 220ms ease;
}

.page-cases .cases-item::before {
  content: "";
  position: absolute;
  inset-block: 0;
  inset-inline-start: 0;
  width: calc(var(--border-thin) * 4);
  background: repeating-linear-gradient(
    180deg,
    var(--color-primary) 0 var(--cases-fret),
    transparent var(--cases-fret) calc(var(--cases-fret) * 2)
  );
  opacity: 0.5;
}

.page-cases .cases-item:hover,
.page-cases .cases-item:focus-within {
  background: var(--color-surface-deep);
  border-color: var(--color-primary);
}

.page-cases .cases-item[hidden] {
  display: none;
}

.page-cases .cases-item__idx {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

.page-cases .cases-item__title {
  margin: var(--space-1) 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-cases .cases-item__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: 0 0 var(--space-3);
}

.page-cases .cases-item__fields {
  display: grid;
  gap: calc(var(--space-1) * 0.5);
  padding-block-start: var(--space-2);
  border-block-start: var(--border-thin) double var(--color-line);
}

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

.page-cases .cases-field__key {
  display: inline-block;
  min-width: 3.4em;
  margin-inline-end: var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-accent);
}

/* ---------- 列表中的停顿图 ---------- */
.page-cases .cases-break {
  margin: var(--space-6) 0 0;
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface-alt);
}

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

.page-cases .cases-break figcaption {
  padding: var(--space-2) var(--space-3);
  border-block-start: var(--border-thin) solid var(--color-line);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 重点实践 ---------- */
.page-cases .cases-featured__body {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: start;
}

.page-cases .cases-featured__title {
  margin: var(--space-2) 0 var(--space-3);
  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-ink);
}

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

.page-cases .cases-featured__list {
  list-style: none;
  margin: 0 0 var(--space-6);
  padding: 0;
  display: grid;
  gap: 0;
  border-block-start: var(--border-thin) double var(--color-line);
}

.page-cases .cases-featured__list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-2);
  align-items: baseline;
  padding-block: var(--space-2);
  border-block-end: var(--border-thin) solid var(--color-line);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-ink);
}

.page-cases .cases-featured__no {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  color: var(--color-primary);
  letter-spacing: 0.1em;
}

.page-cases .cases-featured__cta {
  margin: 0;
}

.page-cases .cases-featured__figure {
  margin: 0;
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface-alt);
}

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

/* ---------- 字段说明 ---------- */
.page-cases .cases-fields__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.page-cases .cases-fields__col {
  display: grid;
  gap: var(--space-3);
}

.page-cases .cases-fields__panel {
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface-alt);
}

.page-cases .cases-fields__panel:nth-child(even) {
  background: var(--color-surface-deep);
}

.page-cases .cases-fields__no {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  line-height: 1;
  color: var(--color-primary);
}

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

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

.page-cases .cases-fields__figure {
  margin: var(--space-6) 0 0;
  border: var(--border-thin) solid var(--color-line);
  background: var(--color-surface-alt);
  display: grid;
  grid-template-columns: 1fr;
}

.page-cases .cases-fields__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-cases .cases-fields__figure figcaption {
  padding: var(--space-3);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  border-block-start: var(--border-thin) solid var(--color-line);
}

/* ---------- 相邻入口 ---------- */
.page-cases .cases-next__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-block-start: var(--border-thin) solid var(--color-contrast-line);
}

.page-cases .cases-next__card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-1) var(--space-3);
  align-items: baseline;
  padding-block: var(--space-3);
  border-block-end: var(--border-thin) solid var(--color-contrast-line);
  text-decoration: none;
  color: var(--color-contrast-ink);
  transition: background 200ms ease, padding-inline 200ms ease;
}

.page-cases .cases-next__card:hover,
.page-cases .cases-next__card:focus-visible {
  background: color-mix(in srgb, var(--color-contrast-accent) 12%, transparent);
  padding-inline: var(--space-2);
}

.page-cases .cases-next__idx {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: var(--color-contrast-accent);
}

.page-cases .cases-next__name {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
}

.page-cases .cases-next__desc {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

.page-cases .cases-next__figure {
  margin: var(--space-6) 0 0;
  border: var(--border-thin) solid var(--color-contrast-line);
}

.page-cases .cases-next__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  opacity: 0.82;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-cases .cases-hero {
    padding-block: var(--space-8) var(--space-8);
  }

  .page-cases .cases-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: end;
    gap: var(--space-3);
  }

  .page-cases .cases-fig--lead {
    transform: translateY(calc(var(--space-2) * -1));
  }

  .page-cases .cases-fig:nth-child(2) {
    transform: translateY(calc(var(--space-6) * -1));
  }

  .page-cases .cases-fig:nth-child(3) {
    transform: translateY(calc(var(--space-1) * -1));
  }

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

  .page-cases .cases-fields__figure {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: stretch;
  }

  .page-cases .cases-fields__figure img {
    aspect-ratio: 1 / 1;
    height: 100%;
  }

  .page-cases .cases-fields__figure figcaption {
    border-block-start: 0;
    border-inline-start: var(--border-thin) solid var(--color-line);
    align-self: center;
  }

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

@media (min-width: 900px) {
  .page-cases .cases-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3) var(--space-4);
  }

  .page-cases .cases-featured__body {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
  }

  .page-cases .cases-featured__figure img {
    aspect-ratio: 4 / 5;
  }
}

@media (min-width: 1080px) {
  .page-cases .cases-next__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-cases .cases-next__card:nth-child(4),
  .page-cases .cases-next__card:nth-child(5) {
    border-block-start: var(--border-thin) solid var(--color-contrast-line);
  }
}