/* ===== 赛事系统页 · 页面专属样式（作用域 .page-platform） ===== */

.page-platform .plat-hero {
  position: relative;
  overflow: hidden;
  border-bottom: var(--border-thick) solid var(--color-contrast-line);
}

.page-platform .plat-hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-platform .plat-hero-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.32;
}

.page-platform .plat-hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
}

.page-platform .plat-hero-inner {
  position: relative;
  z-index: 1;
}

.page-platform .plat-crumb {
  margin-bottom: var(--space-3);
}

.page-platform .plat-crumb .breadcrumb-list,
.page-platform .plat-crumb .breadcrumb-list a {
  color: var(--color-contrast-ink);
}

.page-platform .plat-hero-grid {
  display: grid;
  gap: var(--space-4);
  align-items: start;
}

.page-platform .plat-toc {
  padding: var(--space-2);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-md);
}

.page-platform .plat-toc-title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-accent);
}

.page-platform .plat-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-platform .plat-toc-link {
  display: block;
  padding: 6px 0 6px var(--space-2);
  border-left: var(--border-thin) solid var(--color-contrast-line);
  color: var(--color-contrast-ink);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: border-color 180ms ease-out, color 180ms ease-out, padding-left 180ms ease-out;
}

.page-platform .plat-toc-link:hover {
  border-left-color: var(--color-contrast-accent);
  color: var(--color-contrast-accent);
  padding-left: var(--space-3);
}

.page-platform .plat-kicker-dark {
  color: var(--color-contrast-accent);
}

.page-platform .plat-title {
  margin: var(--space-1) 0 var(--space-2);
  color: var(--color-contrast-ink);
  max-width: 20ch;
}

.page-platform .plat-lede {
  color: var(--color-contrast-ink);
  max-width: var(--measure);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
}

.page-platform .plat-hero-actions {
  margin-top: var(--space-3);
}

/* 首屏数字带 */
.page-platform .plat-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3) var(--space-2);
  margin: var(--space-6) 0 0;
  padding: var(--space-4) 0 0;
  list-style: none;
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-platform .plat-stats .stat-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
  padding-left: var(--space-2);
  border-left: var(--border-thin) solid var(--color-contrast-accent);
}

.page-platform .plat-stats .stat-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-ink);
  overflow-wrap: anywhere;
}

.page-platform .plat-stats .stat-label {
  font-size: var(--text-sm);
  line-height: 1.45;
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

/* 分组标题 */
.page-platform .plat-head {
  max-width: 60ch;
}

.page-platform .plat-head--dark .section-title {
  color: var(--color-contrast-ink);
}

.page-platform .plat-head--dark .section-kicker {
  color: var(--color-contrast-accent);
}

.page-platform .plat-head--dark .section-lede {
  color: var(--color-contrast-ink);
  opacity: 0.82;
}

/* 能力清单 */
.page-platform .plat-entries {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.page-platform .plat-entry {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
  transition: transform 180ms ease-out, border-color 180ms ease-out, background-color 180ms ease-out;
}

.page-platform .section--alt .plat-entry {
  background: var(--color-surface-alt);
}

.page-platform .plat-entry:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary);
  background: var(--color-highlight);
  box-shadow: var(--shadow-2);
}

.page-platform .plat-entry-label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-self: start;
  padding: var(--space-2);
  background: var(--color-primary);
  color: var(--color-primary-ink);
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-sm);
}

.page-platform .plat-entry-tag {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: 1.3;
}

.page-platform .plat-entry-note {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.4;
  color: var(--color-primary-ink);
  opacity: 0.84;
}

.page-platform .plat-entry-body h3 {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

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

.page-platform .plat-specs {
  display: grid;
  gap: 6px;
  margin: var(--space-2) 0 0;
  padding: 0;
  list-style: none;
}

.page-platform .plat-specs li {
  display: grid;
  gap: 2px;
  padding-top: 6px;
  border-top: 1px solid var(--color-line);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

.page-platform .plat-key {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

/* 媒体块 */
.page-platform .plat-media {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-1);
}

.page-platform .plat-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-platform .plat-media--wide img {
  aspect-ratio: 3 / 2;
}

.page-platform .plat-media--tall img {
  aspect-ratio: 2 / 3;
}

.page-platform .plat-media-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  padding: var(--space-3);
  background: var(--overlay-scrim);
}

.page-platform .plat-media-overlay p {
  margin: 0;
  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);
}

.page-platform .plat-figure {
  margin-top: var(--space-4);
}

/* 分栏：竖图 + 条目 */
.page-platform .plat-split {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-4);
  align-items: start;
}

.page-platform .plat-split-media {
  max-width: 420px;
}

.page-platform .plat-entries--stacked {
  margin-top: 0;
}

.page-platform .plat-entries--stacked .plat-entry {
  grid-template-columns: 1fr;
}

.page-platform .plat-entries--stacked .plat-entry-label {
  flex-direction: row;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
}

/* 边界折叠 */
.page-platform .plat-disclosure {
  margin-top: var(--space-4);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-md);
}

.page-platform .plat-disclosure .disclosure-trigger {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: transparent;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-ink);
}

.page-platform .plat-disclosure .disclosure-mark {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  line-height: 1;
  color: var(--color-contrast-accent);
}

.page-platform .plat-disclosure .disclosure-panel {
  padding: 0 var(--space-3) var(--space-3);
}

.page-platform .plat-bounds-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-platform .plat-bounds-list li {
  padding: var(--space-2) 0;
  border-top: 1px solid var(--color-contrast-line);
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-contrast-ink);
  opacity: 0.88;
}

.page-platform .plat-bounds-list strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--color-contrast-accent);
  opacity: 1;
}

/* 下一步出口 */
.page-platform .plat-next-list {
  display: grid;
  gap: 0;
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-platform .plat-next-list li {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-platform .plat-next-list a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-2);
  align-items: baseline;
  padding: var(--space-2) var(--space-1);
  text-decoration: none;
  color: var(--color-ink);
  transition: background-color 180ms ease-out, padding-left 180ms ease-out;
}

.page-platform .plat-next-list a:hover {
  background: var(--color-highlight);
  padding-left: var(--space-2);
}

.page-platform .plat-next-text strong {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: 1.4;
  color: var(--color-ink);
}

.page-platform .plat-next-desc {
  display: block;
  margin-top: 2px;
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--color-ink-soft);
}

.page-platform .plat-next-arrow {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  color: var(--color-accent);
}

/* ===== 响应式 ===== */

@media (min-width: 720px) {
  .page-platform .plat-entry {
    grid-template-columns: 176px minmax(0, 1fr);
    gap: var(--space-4);
    padding: var(--space-4);
  }

  .page-platform .plat-specs li {
    grid-template-columns: 116px minmax(0, 1fr);
    gap: var(--space-2);
  }
}

@media (min-width: 900px) {
  .page-platform .plat-hero {
    padding-block: var(--space-6) var(--space-8);
  }

  .page-platform .plat-hero-grid {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: var(--space-6);
  }

  .page-platform .plat-hero-copy {
    grid-column: 2;
    grid-row: 1;
  }

  .page-platform .plat-toc {
    grid-column: 1;
    grid-row: 1;
    position: sticky;
    top: var(--space-4);
  }

  .page-platform .plat-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-platform .plat-split {
    grid-template-columns: 320px minmax(0, 1fr);
    gap: var(--space-6);
  }

  .page-platform .plat-split-media {
    max-width: none;
  }

  .page-platform .plat-media--wide img {
    aspect-ratio: 16 / 9;
  }
}

@media (max-width: 420px) {
  .page-platform .plat-entry-label {
    flex-direction: row;
    align-items: baseline;
    justify-content: space-between;
    gap: var(--space-1);
  }

  .page-platform .plat-media-overlay p {
    font-size: var(--text-base);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-platform .plat-entry,
  .page-platform .plat-toc-link,
  .page-platform .plat-next-list a {
    transition: none;
  }

  .page-platform .plat-entry:hover {
    transform: none;
  }
}