.page-cases {
  --cases-panel-gap: var(--space-8);
}

/* ---------- 面包屑与首屏 ---------- */

.page-cases .cases-hero {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  position: relative;
  overflow: hidden;
}

.page-cases .cases-hero__crumb {
  margin-bottom: var(--space-6);
}

.page-cases .cases-hero__crumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}

.page-cases .cases-hero__crumb a {
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-cases .cases-hero__eyebrow {
  color: var(--color-contrast-accent);
}

.page-cases .cases-hero__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 0.94;
  letter-spacing: var(--tracking-heading);
  margin: var(--space-3) 0 0;
  max-width: 14ch;
  overflow-wrap: break-word;
}

.page-cases .cases-hero__lede {
  margin-top: var(--space-4);
  max-width: var(--measure);
  color: color-mix(in srgb, var(--color-contrast-ink) 84%, transparent);
}

/* ---------- 首屏左右错位对照面板 ---------- */

.page-cases .cases-hero__stage {
  position: relative;
  margin-top: var(--space-8);
  display: grid;
  gap: var(--space-3);
}

.page-cases .cases-hero__slash {
  display: none;
}

.page-cases .cases-panel {
  padding: var(--space-4);
  border-radius: var(--radius-md);
}

.page-cases .cases-panel--primary {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-cases .cases-panel--dark {
  background: color-mix(in srgb, var(--color-contrast-ink) 7%, var(--color-contrast-surface));
  border: var(--border-thin) solid var(--color-contrast-line);
  color: var(--color-contrast-ink);
}

.page-cases .cases-panel__cap {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  opacity: 0.78;
}

.page-cases .cases-panel__rows {
  list-style: none;
  margin: var(--space-2) 0 0;
  padding: 0;
}

.page-cases .cases-panel__rows li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-2) 0;
  border-top: var(--border-thin) solid color-mix(in srgb, currentColor 26%, transparent);
  font-size: var(--text-sm);
}

.page-cases .cases-panel__k {
  color: inherit;
  opacity: 0.85;
}

.page-cases .cases-panel__v {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--text-base);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

/* ---------- 首屏三组关键数字 ---------- */

.page-cases .cases-numbers {
  margin-top: var(--space-8);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  display: grid;
  gap: var(--space-4);
}

.page-cases .cases-numbers__v {
  display: block;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: var(--text-figure);
  line-height: 0.86;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--color-contrast-accent);
}

.page-cases .cases-numbers__l {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: color-mix(in srgb, var(--color-contrast-ink) 70%, transparent);
}

/* ---------- 图片容器 ---------- */

.page-cases .figure {
  margin: var(--space-6) 0 0;
}

.page-cases .figure__media {
  position: relative;
  overflow: hidden;
  background: var(--color-surface-deep);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  aspect-ratio: 16 / 9;
}

.page-cases .figure__media img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-cases .cases-figure--a .figure__media { aspect-ratio: 3 / 2; }
.page-cases .cases-figure--b .figure__media { aspect-ratio: 3 / 2; }
.page-cases .cases-figure--c .figure__media { aspect-ratio: 12 / 7; }
.page-cases .cases-figure--d .figure__media { aspect-ratio: 3 / 4; }

.page-cases .cases-figure--hero {
  margin-top: var(--space-8);
}

.page-cases .figure__caption {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  line-height: 1.9;
  color: var(--color-ink-muted);
}

.page-cases .section--contrast .figure__caption,
.page-cases .cases-hero .figure__caption {
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}

.page-cases .cases-hero .figure__media {
  border-color: var(--color-contrast-line);
  background: color-mix(in srgb, var(--color-contrast-ink) 8%, var(--color-contrast-surface));
}

/* ---------- 筛选 ---------- */

.page-cases .cases-filter {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.page-cases .filter-status {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

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

.page-cases .filter-btn {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  padding: var(--space-1) var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-ink-soft);
  cursor: pointer;
  transition: background-color 160ms cubic-bezier(0.2, 0.7, 0.2, 1), color 160ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

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

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

/* ---------- 分组 ---------- */

.page-cases .cases-group__head {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.page-cases .cases-group__num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: var(--text-4xl);
  line-height: 0.8;
  letter-spacing: -0.05em;
  color: var(--color-primary);
}

.page-cases .cases-group__lede {
  margin-top: var(--space-3);
}

.page-cases .section--primary .cases-group__num,
.page-cases .section--primary .cases-group__lede {
  color: var(--color-primary-ink);
}

.page-cases .section--primary .cases-group__lede {
  opacity: 0.86;
}

.page-cases .section--contrast .cases-group__num {
  color: var(--color-contrast-accent);
}

.page-cases .section--contrast .cases-group__lede {
  color: color-mix(in srgb, var(--color-contrast-ink) 84%, transparent);
}

.page-cases .section--primary {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-cases .section--contrast {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

/* ---------- 条目矩阵 ---------- */

.page-cases .cases-grid {
  display: grid;
  gap: 0;
}

.page-cases .cases-item {
  padding: var(--space-4) 0;
  border-top: var(--border-thin) solid var(--color-line);
  min-width: 0;
}

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

.page-cases .cases-item__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: var(--text-2xl);
  line-height: 1;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.page-cases .cases-item__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1.24;
  letter-spacing: var(--tracking-heading);
  margin: 0 0 var(--space-3);
}

.page-cases .cases-item__dl {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.page-cases .cases-item__dl dt {
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  color: var(--color-ink-muted);
}

.page-cases .cases-item__dl dd {
  margin: 2px 0 0;
  font-size: var(--text-sm);
  line-height: 1.78;
  color: var(--color-ink-soft);
  overflow-wrap: break-word;
}

.page-cases .section--primary .cases-item {
  border-color: color-mix(in srgb, var(--color-primary-ink) 30%, transparent);
}

.page-cases .section--primary .cases-item__num {
  color: var(--color-primary-ink);
}

.page-cases .section--primary .cases-item__dl dt {
  color: color-mix(in srgb, var(--color-primary-ink) 66%, transparent);
}

.page-cases .section--primary .cases-item__dl dd {
  color: color-mix(in srgb, var(--color-primary-ink) 94%, transparent);
}

.page-cases .section--contrast .cases-item {
  border-color: var(--color-contrast-line);
}

.page-cases .section--contrast .cases-item__num {
  color: var(--color-contrast-accent);
}

.page-cases .section--contrast .cases-item__dl dt {
  color: color-mix(in srgb, var(--color-contrast-ink) 58%, transparent);
}

.page-cases .section--contrast .cases-item__dl dd {
  color: var(--color-contrast-ink);
}

/* ---------- 字段说明 ---------- */

.page-cases .cases-fields__lede {
  margin-top: var(--space-3);
  max-width: var(--measure);
}

.page-cases .cases-fields__list {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-cases .cases-field {
  border-top: var(--border-thin) solid var(--color-line);
}

.page-cases .cases-field__summary {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-3) 0;
  cursor: pointer;
  list-style: none;
}

.page-cases .cases-field__summary::-webkit-details-marker { display: none; }
.page-cases .cases-field__summary::marker { content: ""; }

.page-cases .cases-field__summary::after {
  content: "+";
  margin-left: var(--space-2);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: var(--text-base);
  line-height: 1;
  color: var(--color-primary);
}

.page-cases .cases-field[open] .cases-field__summary::after {
  content: "\2212";
}

.page-cases .cases-field__summary:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-cases .cases-field__name {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--text-base);
  letter-spacing: -0.01em;
  color: var(--color-ink);
}

.page-cases .cases-field__unit {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
  white-space: nowrap;
}

.page-cases .cases-field__body {
  padding: 0 0 var(--space-3);
  display: grid;
  gap: var(--space-1);
}

.page-cases .cases-field__body p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.9;
  color: var(--color-ink-soft);
}

/* ---------- 结果呈现 ---------- */

.page-cases .cases-output__grid {
  display: grid;
  gap: var(--space-6);
}

.page-cases .cases-output__rules {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-cases .cases-output__rules li {
  padding-left: var(--space-3);
  border-left: 2px solid var(--color-accent);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-cases .cases-output__figure {
  margin-top: var(--space-4);
}

/* ---------- 后续入口 ---------- */

.page-cases .cases-next__lede {
  margin-top: var(--space-3);
  max-width: var(--measure);
}

.page-cases .cases-next__list {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-cases .cases-next__list li {
  border-top: var(--border-thin) solid var(--color-line);
}

.page-cases .cases-next__list a {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3) 0;
  text-decoration: none;
  color: var(--color-ink);
}

.page-cases .cases-next__list a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

.page-cases .cases-next__name {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
  color: var(--color-primary);
}

.page-cases .cases-next__desc {
  font-size: var(--text-sm);
  line-height: 1.74;
  color: var(--color-ink-muted);
}

/* ---------- 入场动效 ---------- */

.page-cases [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 220ms cubic-bezier(0.2, 0.7, 0.2, 1), transform 220ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

.page-cases [data-reveal="strip"] {
  transform: translateX(-24px);
}

.page-cases [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 断点 ---------- */

@media (min-width: 640px) {
  .page-cases .cases-numbers {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-cases .cases-item__dl {
    grid-template-columns: 7ch minmax(0, 1fr);
    column-gap: var(--space-2);
  }

  .page-cases .cases-item__dl dt {
    margin-top: var(--space-2);
  }

  .page-cases .cases-item__dl dd {
    grid-column: 2;
  }
}

@media (min-width: 768px) {
  .page-cases .cases-group__head {
    grid-template-columns: auto minmax(0, 1fr);
    column-gap: var(--space-6);
    align-items: start;
  }

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

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

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

  .page-cases .cases-next__list a {
    flex-direction: row;
    align-items: baseline;
    gap: var(--space-3);
  }

  .page-cases .cases-next__name {
    min-width: 8ch;
  }
}

@media (min-width: 1024px) {
  .page-cases .cases-hero__stage {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    column-gap: var(--space-6);
    align-items: start;
  }

  .page-cases .cases-panel--dark {
    margin-top: var(--cases-panel-gap);
  }

  .page-cases .cases-hero__slash {
    display: block;
    position: absolute;
    left: 50%;
    top: 14%;
    width: 4px;
    height: 52%;
    background: var(--color-contrast-accent);
    transform: translateX(-50%) rotate(15deg);
    transform-origin: top center;
    z-index: 3;
    pointer-events: none;
  }

  .page-cases .cases-output__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    column-gap: var(--space-8);
    align-items: start;
  }

  .page-cases .cases-output__figure {
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-cases [data-reveal],
  .page-cases [data-reveal="strip"] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-cases .filter-btn {
    transition: none;
  }
}
</main>