/* ============================================
   page-platform — 平台入口 / 指标看板
   作用域：.page-platform
   ============================================ */

.page-platform {
  --pp-rule: var(--border-thin) solid var(--color-line);
  --pp-rule-dark: var(--border-thin) solid var(--color-contrast-line);
}

/* ---------- 首屏 ---------- */

.page-platform .entry-hero {
  padding-block: var(--space-8) var(--space-6);
}

.page-platform .entry-hero .crumbs {
  margin-bottom: var(--space-4);
}

.page-platform .entry-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-ink);
  margin: 0 0 var(--space-3);
  max-width: 16ch;
}

.page-platform .entry-hero__lead {
  max-width: var(--measure);
  color: var(--color-ink-soft);
  margin: 0;
}

/* 关键数字组：错落排布，不做四格等分 */

.page-platform .hero-figures {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-6);
  border-top: var(--pp-rule);
  padding-top: var(--space-4);
}

.page-platform .hero-figure {
  min-width: 0;
  padding-left: var(--space-2);
  border-left: 2px solid var(--color-primary);
}

.page-platform .hero-figure--lg {
  border-left-width: 4px;
  border-left-color: var(--color-accent);
}

.page-platform .hero-figure__value {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  flex-wrap: wrap;
  margin: 0;
  font-family: var(--font-heading);
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--color-ink);
}

.page-platform .hero-figure__num {
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: var(--tracking-heading);
}

.page-platform .hero-figure__unit {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  letter-spacing: 0.04em;
}

.page-platform .hero-figure__note {
  margin: var(--space-1) 0 0;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
  max-width: 34ch;
}

/* 五组分类索引 */

.page-platform .hero-index {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  border-top: var(--pp-rule);
}

.page-platform .hero-index__link {
  display: grid;
  grid-template-columns: 3ch minmax(0, 1fr) auto;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-1);
  border-bottom: var(--pp-rule);
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: background-color 160ms ease-out, color 160ms ease-out, padding-left 160ms ease-out;
}

.page-platform .hero-index__link:hover,
.page-platform .hero-index__link:focus-visible {
  background-color: var(--color-highlight);
  color: var(--color-ink);
  padding-left: var(--space-2);
}

.page-platform .hero-index__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  letter-spacing: 0.06em;
}

.page-platform .hero-index__name {
  font-size: var(--text-base);
  letter-spacing: 0.02em;
}

.page-platform .hero-index__count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  white-space: nowrap;
}

/* 首屏图片 */

.page-platform .hero-media {
  margin: var(--space-6) 0 0;
}

.page-platform .hero-media__frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.page-platform .hero-media__frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  filter: saturate(0.5) contrast(0.95) brightness(0.94);
}

.page-platform .hero-media__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  pointer-events: none;
}

.page-platform .hero-media__body {
  position: absolute;
  inset: auto var(--space-3) var(--space-3);
  margin: 0;
  max-width: 44ch;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-contrast-ink);
}

/* ---------- 看板 ---------- */

.page-platform .board-section {
  border-top: var(--border-thin) solid var(--color-line);
}

.page-platform .board {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.page-platform .board-group {
  min-width: 0;
}

.page-platform .board-group__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  border-top: var(--pp-rule);
  padding-top: var(--space-2);
  margin-bottom: var(--space-3);
}

.page-platform .board-group__name {
  position: relative;
  margin: 0;
  padding-left: var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-platform .board-group__name::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.28em;
  bottom: 0.28em;
  width: 2px;
  background-color: var(--color-primary);
}

.page-platform .board-group__count {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
  white-space: nowrap;
}

.page-platform .board-group__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-3);
}

/* 指标条目 */

.page-platform .metric {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-width: 0;
  padding: var(--space-3);
  background-color: var(--color-surface-deep);
  border-left: 2px solid transparent;
  transition: background-color 160ms ease-out, border-left-color 160ms ease-out;
}

.page-platform .metric:hover,
.page-platform .metric:focus-visible {
  background-color: var(--color-highlight);
  border-left-color: var(--color-accent);
}

.page-platform .metric__name {
  margin: 0;
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink-soft);
}

.page-platform .metric__value {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  flex-wrap: wrap;
  margin: 0;
  font-family: var(--font-heading);
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--color-ink);
}

.page-platform .metric__num {
  font-size: var(--text-4xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  letter-spacing: var(--tracking-heading);
}

.page-platform .metric__num--text {
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
}

.page-platform .metric__unit {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  letter-spacing: 0.03em;
}

.page-platform .metric__spec {
  margin: 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-muted);
}

/* 分组内图片 */

.page-platform .board-group__media {
  margin: 0;
  min-width: 0;
}

.page-platform .board-group__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
  object-fit: cover;
  border-radius: var(--radius-lg);
  filter: saturate(0.5) contrast(0.95) brightness(0.94);
}

.page-platform .board-group__media--lead img {
  aspect-ratio: 3 / 2;
}

.page-platform .board-group__caption {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-ink-muted);
}

.page-platform .board-note {
  margin-top: var(--space-6);
  padding-left: var(--space-3);
  border-left: 4px solid var(--color-accent);
  max-width: var(--measure);
}

.page-platform .board-note .text-link {
  margin-inline: 0.15em;
}

/* ---------- 深色入口说明 ---------- */

.page-platform .entry-gate {
  border-block: var(--border-thin) solid var(--color-contrast-line);
}

.page-platform .entry-gate__mark {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-contrast-accent);
  margin-bottom: var(--space-2);
}

.page-platform .entry-gate__title {
  margin: 0 0 var(--space-3);
  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-contrast-ink);
}

.page-platform .entry-gate__lead {
  margin: 0 0 var(--space-4);
  max-width: var(--measure);
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

.page-platform .entry-gate__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--pp-rule-dark);
}

.page-platform .entry-gate__list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-1);
  padding-block: var(--space-2);
  border-bottom: var(--pp-rule-dark);
}

.page-platform .entry-gate__key {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
}

.page-platform .entry-gate__val {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-contrast-ink);
  opacity: 0.88;
}

.page-platform .entry-gate .text-link {
  color: var(--color-contrast-accent);
  border-bottom-color: currentColor;
}

.page-platform .entry-gate .text-link:hover,
.page-platform .entry-gate .text-link:focus-visible {
  color: var(--color-contrast-ink);
}

.page-platform .entry-gate__media {
  margin: var(--space-6) 0 0;
}

.page-platform .entry-gate__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-lg);
  filter: saturate(0.45) contrast(0.98) brightness(0.9);
}

.page-platform .entry-gate__caption {
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-contrast-ink);
  opacity: 0.66;
}

/* ---------- 口径边界 ---------- */

.page-platform .scope-section {
  border-top: var(--border-thin) solid var(--color-line);
}

.page-platform .scope-list {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

.page-platform .scope-list__item {
  min-width: 0;
  padding-left: var(--space-3);
  border-left: var(--border-thin) solid var(--color-line);
  transition: border-left-color 160ms ease-out, border-left-width 160ms ease-out;
}

.page-platform .scope-list__item:hover {
  border-left-width: 4px;
  border-left-color: var(--color-accent);
}

.page-platform .scope-list__title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-platform .scope-list__text {
  margin: 0;
  max-width: 52ch;
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
}

.page-platform .scope-note {
  margin-top: var(--space-6);
  padding-top: var(--space-3);
  border-top: var(--pp-rule);
  max-width: var(--measure);
}

.page-platform .scope-note .text-link {
  margin-inline: 0.15em;
}

/* ---------- 桌面端栅格 ---------- */

@media (min-width: 860px) {

  .page-platform .entry-hero {
    padding-block: var(--section-y-lg) var(--section-y);
  }

  .page-platform .hero-figures {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--space-6) var(--gutter);
  }

  .page-platform .hero-figure--lg:nth-child(1) { grid-column: 1 / span 6; }
  .page-platform .hero-figure--lg:nth-child(2) { grid-column: 7 / span 6; }
  .page-platform .hero-figure--sm:nth-child(3) { grid-column: 1 / span 6; }
  .page-platform .hero-figure--sm:nth-child(4) { grid-column: 7 / span 6; }

  .page-platform .hero-media {
    margin-top: var(--space-8);
  }

  .page-platform .hero-media__frame img {
    aspect-ratio: 16 / 9;
  }

  .page-platform .hero-media__body {
    inset: auto var(--space-6) var(--space-6);
  }

  .page-platform .board {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--space-8) var(--gutter);
    margin-top: var(--space-8);
  }

  .page-platform .board-group--access { grid-column: span 12; }
  .page-platform .board-group--catalog { grid-column: span 7; }
  .page-platform .board-group--compat { grid-column: span 5; }
  .page-platform .board-group--service { grid-column: span 7; }
  .page-platform .board-group--stability { grid-column: span 5; }

  .page-platform .board-group--access .board-group__body {
    grid-template-columns: 1fr 1fr 1.05fr;
    gap: var(--gutter);
  }

  .page-platform .board-group--service .board-group__body {
    grid-template-columns: 1fr 1fr;
    gap: var(--gutter);
  }

  .page-platform .board-group--access .board-group__media img {
    aspect-ratio: 9 / 7;
  }

  .page-platform .entry-gate__list li {
    grid-template-columns: 6ch minmax(0, 1fr);
    gap: var(--space-3);
    align-items: baseline;
  }

  .page-platform .entry-gate__media {
    margin-top: 0;
  }

  .page-platform .scope-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-6) var(--gutter);
    margin-top: var(--space-8);
  }
}

@media (min-width: 1080px) {
  .page-platform .board-section,
  .page-platform .scope-section {
    padding-block: var(--section-y-lg);
  }
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-platform .metric,
  .page-platform .hero-index__link,
  .page-platform .scope-list__item {
    transition: none;
  }
}
<<<END>>>