.page-platform {
  display: block;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  overflow-x: hidden;
}

/* ---------- 通用区块头 ---------- */
.page-platform .platform-head {
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin) solid var(--color-line);
  margin-bottom: var(--space-4);
}
.page-platform .platform-head--tight {
  border-bottom-color: color-mix(in srgb, var(--color-primary) 40%, var(--color-line));
}
.page-platform .platform-head__eyebrow {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-primary);
}
.page-platform .platform-head__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}
.page-platform .platform-head__meta {
  margin: var(--space-2) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

/* ---------- 首屏 ---------- */
.page-platform .platform-hero {
  padding: var(--space-4) 0 var(--space-8);
}
.page-platform .platform-hero__grid {
  display: grid;
  gap: var(--space-6);
}
.page-platform .platform-hero__eyebrow {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-accent);
}
.page-platform .platform-hero__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  max-width: 16ch;
}
.page-platform .platform-hero__lede {
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-platform .platform-hero__stats {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-platform .platform-hero__stat {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  align-items: baseline;
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.page-platform .platform-hero__stat:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-platform .platform-hero__num {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}
.page-platform .platform-hero__stat-text {
  display: grid;
  gap: var(--space-1);
}
.page-platform .platform-hero__stat-label {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}
.page-platform .platform-hero__stat-note {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  line-height: 1.6;
}

.page-platform .platform-hero__index {
  padding: var(--space-4) var(--space-3);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}
.page-platform .platform-hero__index::after {
  content: "";
  position: absolute;
  inset: auto -20% -60% auto;
  width: 60%;
  padding-top: 60%;
  border-radius: var(--radius-pill);
  background: radial-gradient(circle, color-mix(in srgb, var(--color-contrast-accent) 32%, transparent) 0%, transparent 70%);
  pointer-events: none;
}
.page-platform .platform-hero__index-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-contrast-accent);
}
.page-platform .platform-index-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-platform .platform-index-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) auto;
  gap: var(--space-2);
  align-items: center;
  padding: var(--space-2) 0;
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
}
.page-platform .platform-index-item:last-child {
  border-bottom: 0;
}
.page-platform .platform-index__line {
  display: block;
  height: 0;
  border-top: var(--border-thin) solid var(--color-contrast-accent);
  border-radius: var(--radius-pill);
}
.page-platform .platform-index__count {
  color: var(--color-contrast-accent);
  font-variant-numeric: tabular-nums;
}
.page-platform .platform-index__figure {
  margin: var(--space-3) 0 0;
  position: relative;
  z-index: 1;
}
.page-platform .platform-index__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* ---------- 分类索引带 ---------- */
.page-platform .platform-cats {
  padding: var(--section-y) 0 0;
}
.page-platform .platform-cats__band {
  background: var(--color-surface-alt);
  border-radius: var(--radius-lg);
  padding: var(--space-2);
}
.page-platform .platform-cats__list {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(170px, 78%);
  gap: var(--space-2);
  margin: 0;
  padding: 0 0 var(--space-1);
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}
.page-platform .platform-cats__link {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border-bottom: var(--border-thin) solid var(--color-line);
  color: var(--color-ink);
  text-decoration: none;
  scroll-snap-align: start;
  transition: border-color 200ms ease, box-shadow 200ms ease, transform 200ms ease;
}
.page-platform .platform-cats__link:hover,
.page-platform .platform-cats__link:focus-visible {
  border-bottom-color: var(--color-accent);
  box-shadow: var(--shadow-1);
  transform: translateY(-2px);
}
.page-platform .platform-cats__link:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: var(--space-1);
}
.page-platform .platform-cats__no {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  letter-spacing: 0.1em;
}
.page-platform .platform-cats__name {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
}
.page-platform .platform-cats__count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-underline-offset: 4px;
}
.page-platform .platform-cats__figure {
  margin: var(--space-4) 0 0;
}
.page-platform .platform-cats__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-lg);
}
.page-platform .figure__caption {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* ---------- 目录区 ---------- */
.page-platform .platform-dir {
  padding: var(--section-y) 0 0;
}
.page-platform .platform-dir__layout {
  display: grid;
  gap: var(--space-6);
}
.page-platform .platform-dir__aside {
  display: grid;
  gap: var(--space-3);
}
.page-platform .platform-dir__figure {
  margin: 0;
}
.page-platform .platform-dir__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}
.page-platform .platform-dir__legend {
  background: var(--color-surface-deep);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
}
.page-platform .platform-dir__legend-title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-soft);
}
.page-platform .platform-dir__legend-list {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
  justify-items: start;
}
.page-platform .platform-dir__legend-note {
  margin: var(--space-3) 0 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-ink-soft);
}

.page-platform .platform-group {
  margin-top: var(--space-6);
}
.page-platform .platform-group:first-child {
  margin-top: 0;
}
.page-platform .platform-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2) var(--space-3);
  border-top: var(--border-thin) solid var(--color-accent);
  padding-top: var(--space-2);
}
.page-platform .platform-group__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}
.page-platform .platform-group__count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}
.page-platform .platform-group__note {
  margin: var(--space-2) 0 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-platform .platform-entries {
  margin: var(--space-2) 0 0;
  padding: 0;
  list-style: none;
}
.page-platform .platform-entry {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.page-platform .platform-entry__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-underline-offset: 4px;
}
.page-platform .platform-entry__body {
  display: grid;
  gap: var(--space-2);
  min-width: 0;
}
.page-platform .platform-entry__top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1) var(--space-2);
}
.page-platform .platform-entry__name {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}
.page-platform .platform-entry__desc {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.page-platform .platform-entry__more {
  border-radius: var(--radius-sm);
}
.page-platform .platform-entry__more > summary {
  cursor: pointer;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  letter-spacing: 0.04em;
}
.page-platform .platform-entry__more > summary:hover {
  color: var(--color-primary);
}
.page-platform .platform-entry__more > summary:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: var(--space-1);
}
.page-platform .platform-entry__more p {
  margin: var(--space-1) 0 0;
  padding-left: var(--space-3);
  border-left: var(--border-thin) solid var(--color-line);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

/* ---------- 状态标签 ---------- */
.page-platform .platform-state {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 0 var(--space-2);
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  line-height: 1.9;
  white-space: nowrap;
}
.page-platform .platform-state__dot {
  display: block;
  width: 0.45em;
  height: 0.45em;
  border-radius: var(--radius-pill);
  background: currentColor;
}
.page-platform .platform-state--listed {
  background: color-mix(in srgb, var(--color-primary) 16%, var(--color-surface));
  color: var(--color-primary);
}
.page-platform .platform-state--watch {
  background: var(--color-surface-deep);
  color: var(--color-ink-soft);
}
.page-platform .platform-state--test {
  background: var(--color-highlight);
  color: var(--color-accent);
}

/* ---------- 状态与核对 ---------- */
.page-platform .platform-status {
  margin-top: var(--section-y);
  padding: var(--space-6) 0;
  background: var(--color-primary-soft);
  border-radius: var(--radius-lg);
}
.page-platform .platform-status__grid {
  display: grid;
  gap: var(--space-3);
}
.page-platform .platform-state-card {
  display: grid;
  gap: var(--space-2);
  justify-items: start;
  padding: var(--space-3);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}
.page-platform .platform-state-card__body {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink);
}
.page-platform .platform-state-card__hint {
  margin: 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}
.page-platform .platform-verify {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 36%, var(--color-line));
}
.page-platform .platform-verify__title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}
.page-platform .platform-verify__body {
  margin: var(--space-2) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  color: var(--color-ink);
}
.page-platform .platform-verify__note {
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.page-platform .platform-verify__figure {
  margin: 0;
}
.page-platform .platform-verify__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
}

/* ---------- 相邻入口 ---------- */
.page-platform .platform-next {
  padding: var(--section-y) 0 var(--section-y-lg);
}
.page-platform .platform-next__grid {
  display: grid;
  gap: var(--space-3);
}
.page-platform .platform-next__card {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-3);
  background: var(--color-surface-alt);
  border-radius: var(--radius-lg);
  border-left: var(--border-thin) solid var(--color-line);
  color: var(--color-ink);
  text-decoration: none;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}
.page-platform .platform-next__card:hover,
.page-platform .platform-next__card:focus-visible {
  border-left-color: var(--color-accent);
  box-shadow: var(--shadow-1);
}
.page-platform .platform-next__card:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: var(--space-1);
}
.page-platform .platform-next__no {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  letter-spacing: 0.1em;
}
.page-platform .platform-next__name {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
}
.page-platform .platform-next__desc {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}
.page-platform .platform-next__foot {
  margin: var(--space-4) 0 0;
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  max-width: var(--measure);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

/* ---------- 图片通用 ---------- */
.page-platform .media {
  position: relative;
  overflow: hidden;
}
.page-platform .media img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-platform .platform-head__title {
    font-size: var(--text-3xl);
  }
  .page-platform .platform-entry {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: var(--space-1) var(--space-3);
    align-items: start;
  }
  .page-platform .platform-entry__no {
    text-align: right;
    padding-top: var(--space-1);
  }
  .page-platform .platform-status__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-platform .platform-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-platform .platform-dir__legend-list {
    grid-template-columns: repeat(3, auto);
    justify-content: start;
  }
}

@media (min-width: 960px) {
  .page-platform .platform-hero {
    padding: var(--space-6) 0 var(--section-y);
  }
  .page-platform .platform-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    grid-template-areas:
      "lead index"
      "stats index";
    gap: var(--space-4) var(--space-6);
    align-items: start;
  }
  .page-platform .platform-hero__lead { grid-area: lead; }
  .page-platform .platform-hero__stats { grid-area: stats; }
  .page-platform .platform-hero__index {
    grid-area: index;
    align-self: stretch;
    padding: var(--space-6) var(--space-4);
  }
  .page-platform .platform-cats__list {
    grid-auto-flow: row;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    overflow-x: visible;
    padding-bottom: 0;
  }
  .page-platform .platform-status__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-platform .platform-verify {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: var(--space-6);
    align-items: center;
  }
  .page-platform .platform-next__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-platform .platform-dir__layout {
    grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
    gap: var(--space-6);
    align-items: start;
  }
  .page-platform .platform-dir__aside {
    position: sticky;
    top: calc(var(--topbar-h) + var(--space-3));
  }
  .page-platform .platform-dir__legend-list {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-platform .platform-cats__link,
  .page-platform .platform-next__card {
    transition: none;
  }
  .page-platform .platform-cats__link:hover,
  .page-platform .platform-cats__link:focus-visible {
    transform: none;
  }
}
</main>