.page-platform {
  --plat-line-soft: color-mix(in srgb, var(--color-line) 88%, transparent);
  --plat-line-deep: color-mix(in srgb, var(--color-contrast-line) 95%, transparent);
  --plat-ink-on-deep: color-mix(in srgb, var(--color-contrast-ink) 68%, transparent);
  display: block;
  background-color: var(--color-surface);
  color: var(--color-ink);
}

.page-platform img {
  max-width: 100%;
  height: auto;
}

/* ---------- 首屏 ---------- */

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

.page-platform .plat-hero__media {
  position: absolute;
  inset: 0;
  z-index: -2;
}

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

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

.page-platform .plat-hero__wedge {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.page-platform .plat-hero__wedge::before {
  content: "";
  position: absolute;
  left: -14%;
  right: 40%;
  top: -12%;
  bottom: 14%;
  background-color: var(--color-primary);
  opacity: 0.82;
  clip-path: polygon(0 0, 100% 0, 84% 100%, 0 100%);
}

.page-platform .plat-hero__wedge::after {
  content: "";
  position: absolute;
  left: 46%;
  right: -16%;
  top: 48%;
  bottom: -14%;
  background-color: var(--color-accent);
  opacity: 0.76;
  clip-path: polygon(20% 0, 100% 24%, 100% 100%, 0 100%);
}

.page-platform .plat-hero__inner {
  display: grid;
  gap: var(--space-6);
  padding-top: var(--space-4);
  padding-bottom: var(--section-y-lg);
}

.page-platform .plat-hero__crumb {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--plat-ink-on-deep);
}

.page-platform .plat-hero__crumb a {
  color: var(--color-contrast-accent);
  text-decoration: none;
}

.page-platform .plat-hero__crumb a:hover,
.page-platform .plat-hero__crumb a:focus-visible {
  text-decoration: underline;
}

.page-platform .plat-hero__eyebrow {
  margin: 0 0 var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.16em;
  color: var(--color-contrast-accent);
}

.page-platform .plat-hero__title {
  margin: 0 0 var(--space-4);
  max-width: 13ch;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: 0.9;
  letter-spacing: var(--tracking-heading);
  color: var(--color-primary-ink);
}

.page-platform .plat-hero__lead {
  margin: 0;
  max-width: 44ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-platform .plat-hero__figures {
  display: grid;
  border-left: 1px dashed var(--plat-line-deep);
  padding-left: var(--space-3);
}

.page-platform .plat-figure {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding-block: var(--space-3);
  border-bottom: 1px dashed var(--plat-line-deep);
}

.page-platform .plat-figure:last-child {
  border-bottom: 0;
}

.page-platform .plat-figure__num {
  flex: none;
  font-family: var(--font-mono);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: 0.9;
  font-variant-numeric: tabular-nums;
  color: var(--color-contrast-accent);
}

.page-platform .plat-figure__meta {
  display: grid;
  gap: 2px;
}

.page-platform .plat-figure__meta strong {
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-ink);
}

.page-platform .plat-figure__meta span {
  font-size: var(--text-sm);
  line-height: 1.45;
  color: var(--plat-ink-on-deep);
}

/* ---------- 区块标题 ---------- */

.page-platform .plat-sect-head {
  max-width: 62ch;
  margin-bottom: var(--space-6);
  padding-left: var(--space-3);
  border-left: 1px dashed var(--plat-line-soft);
}

.page-platform .plat-sect-head--light {
  border-left-color: var(--plat-line-soft);
}

.page-platform .plat-sect-head__tag {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: var(--color-primary);
}

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

.page-platform .plat-sect-head__lead {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 难处段 ---------- */

.page-platform .plat-pains {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block: var(--section-y-lg);
}

.page-platform .plat-pains .plat-sect-head {
  border-left-color: var(--plat-line-deep);
}

.page-platform .plat-pains .plat-sect-head__tag {
  color: var(--color-contrast-accent);
}

.page-platform .plat-pains .plat-sect-head__title {
  color: var(--color-contrast-ink);
}

.page-platform .plat-pains .plat-sect-head__lead {
  color: var(--plat-ink-on-deep);
}

.page-platform .plat-pains__grid {
  display: grid;
  gap: var(--space-6);
}

.page-platform .plat-pain {
  padding-block: var(--space-4);
  border-top: 1px dashed var(--plat-line-deep);
  transition: background-color 180ms ease, border-color 180ms ease;
}

.page-platform .plat-pain:last-child {
  border-bottom: 1px dashed var(--plat-line-deep);
}

.page-platform .plat-pain:hover,
.page-platform .plat-pain:focus-within {
  background-color: color-mix(in srgb, var(--color-primary) 20%, transparent);
  border-top-color: var(--color-primary);
}

.page-platform .plat-pain__index {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-contrast-accent);
}

.page-platform .plat-pain__title {
  margin: 0 0 var(--space-2);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}

.page-platform .plat-pain__text {
  margin: 0;
  max-width: 56ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--plat-ink-on-deep);
}

.page-platform .plat-pains__media {
  margin: 0;
}

.page-platform .plat-pains__media img {
  display: block;
  width: 100%;
  aspect-ratio: 9 / 11;
  object-fit: cover;
  border: 1px solid var(--color-contrast-line);
}

.page-platform .plat-pains__media figcaption {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--plat-ink-on-deep);
}

/* ---------- 做法段 ---------- */

.page-platform .plat-moves {
  background-color: var(--color-surface);
  padding-block: var(--section-y-lg);
}

.page-platform .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  padding-block: var(--space-3);
  margin-bottom: var(--space-2);
  border-top: 1px dashed var(--plat-line-soft);
  border-bottom: 1px dashed var(--plat-line-soft);
}

.page-platform .filter-btn {
  padding: 6px var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
  background-color: var(--color-surface-alt);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease;
}

.page-platform .filter-btn:hover {
  background-color: var(--color-primary-soft);
  color: var(--color-ink);
}

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

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

.page-platform .plat-move[data-filter-item].is-filtered-out,
.page-platform .filter-empty.is-filtered-out {
  display: none;
}

.page-platform .filter-empty {
  margin: var(--space-4) 0 0;
  font-size: var(--text-base);
  color: var(--color-ink-muted);
}

.page-platform .plat-move {
  display: grid;
  gap: var(--space-3);
  padding-block: var(--space-4);
  border-top: 1px solid var(--color-line);
  transition: background-color 180ms ease, outline-color 180ms ease;
  outline: 2px solid transparent;
  outline-offset: 8px;
}

.page-platform .plat-move:last-of-type {
  border-bottom: 1px solid var(--color-line);
}

.page-platform:has(.plat-pain[data-pair="load"]:hover) .plat-move[data-pair="load"],
.page-platform:has(.plat-pain[data-pair="award"]:hover) .plat-move[data-pair="award"],
.page-platform:has(.plat-pain[data-pair="compare"]:hover) .plat-move[data-pair="compare"] {
  background-color: var(--color-primary-soft);
  outline-color: var(--color-primary);
}

.page-platform .plat-move__badge {
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-platform .plat-move__badge .num {
  font-family: var(--font-mono);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--color-primary);
}

.page-platform .plat-move__badge small {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-platform .plat-move__title {
  margin: 0 0 var(--space-2);
  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 .plat-move__text {
  margin: 0;
  max-width: 60ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-platform .plat-move__facts {
  display: grid;
  gap: var(--space-1);
  margin: 0;
  padding: 0 0 0 var(--space-3);
  list-style: none;
  border-left: 1px dashed var(--plat-line-soft);
}

.page-platform .plat-move__facts li {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

/* ---------- 结果段 ---------- */

.page-platform .plat-outcomes {
  background-color: var(--color-surface);
  padding-block: var(--section-y-lg);
  border-top: 1px dashed var(--plat-line-soft);
}

.page-platform .plat-outcomes__grid {
  display: grid;
  gap: var(--space-6);
}

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

.page-platform .plat-outcomes__lead {
  margin: 0 0 var(--space-6);
  max-width: 56ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

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

.page-platform .plat-outcome {
  padding-block: var(--space-3);
  border-top: 1px dashed var(--plat-line-soft);
}

.page-platform .plat-outcome:last-child {
  border-bottom: 1px dashed var(--plat-line-soft);
}

.page-platform .plat-outcome h3 {
  margin: 0 0 6px;
  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 .plat-outcome p {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-platform .plat-outcomes__media {
  margin: 0;
}

.page-platform .plat-outcomes__media img {
  display: block;
  width: 100%;
  aspect-ratio: 12 / 7;
  object-fit: cover;
  border: 1px solid var(--color-line);
}

.page-platform .plat-outcomes__media figcaption {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-ink-muted);
}

/* ---------- 场馆视角段 ---------- */

.page-platform .plat-field {
  background-color: var(--color-surface-alt);
  padding-block: var(--section-y);
}

.page-platform .plat-field__grid {
  display: grid;
  gap: var(--space-6);
}

.page-platform .plat-field__media {
  margin: 0;
}

.page-platform .plat-field__media img {
  display: block;
  width: 100%;
  aspect-ratio: 15 / 9;
  object-fit: cover;
  border: 1px solid var(--color-line);
}

.page-platform .plat-field__title {
  margin: var(--space-2) 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-platform .plat-field__text p {
  margin: 0 0 var(--space-3);
  max-width: 62ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-platform .plat-field__text p:last-child {
  margin-bottom: 0;
}

/* ---------- 入口段 ---------- */

.page-platform .plat-routes {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block: var(--section-y-lg);
}

.page-platform .plat-routes .plat-sect-head {
  border-left-color: var(--plat-line-deep);
}

.page-platform .plat-routes .plat-sect-head__tag {
  color: var(--color-contrast-accent);
}

.page-platform .plat-routes .plat-sect-head__title {
  color: var(--color-contrast-ink);
}

.page-platform .plat-routes .plat-sect-head__lead {
  color: var(--plat-ink-on-deep);
}

.page-platform .plat-routes__grid {
  display: grid;
  gap: var(--space-3);
}

.page-platform .plat-route {
  display: grid;
  gap: var(--space-2);
  align-content: start;
  padding: var(--space-3);
  color: var(--color-contrast-ink);
  text-decoration: none;
  background-color: color-mix(in srgb, var(--color-contrast-surface) 60%, var(--color-primary) 12%);
  border: 1px dashed var(--color-contrast-line);
  border-radius: var(--radius-sm);
  transition: border-color 180ms ease, background-color 180ms ease;
}

.page-platform .plat-route:hover,
.page-platform .plat-route:focus-visible {
  border-color: var(--color-contrast-accent);
  background-color: color-mix(in srgb, var(--color-contrast-surface) 45%, var(--color-primary) 20%);
}

.page-platform .plat-route:focus-visible {
  outline: 2px solid var(--color-contrast-accent);
  outline-offset: 3px;
}

.page-platform .plat-route__tag {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-contrast-accent);
}

.page-platform .plat-route h3 {
  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-primary-ink);
}

.page-platform .plat-route p {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--plat-ink-on-deep);
}

.page-platform .plat-route__go {
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-accent);
  border-bottom: 1px dashed var(--color-contrast-accent);
  justify-self: start;
}

.page-platform .plat-exits {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px dashed var(--plat-line-deep);
}

.page-platform .plat-exits__lead {
  margin: 0 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--plat-ink-on-deep);
}

.page-platform .plat-exits__list {
  display: grid;
  gap: var(--space-2);
  margin: 0 0 var(--space-3);
  padding: 0;
  list-style: none;
}

.page-platform .plat-exits__list a {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  text-decoration: none;
  border-bottom: 2px solid var(--color-primary);
  padding-bottom: 1px;
}

.page-platform .plat-exits__list a:hover,
.page-platform .plat-exits__list a:focus-visible {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}

.page-platform .plat-exits__list a:focus-visible {
  outline: 2px solid var(--color-contrast-accent);
  outline-offset: 3px;
}

.page-platform .plat-exits__note {
  margin: 0;
  max-width: 68ch;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--plat-ink-on-deep);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-platform .plat-hero__inner {
    padding-top: var(--space-6);
  }

  .page-platform .plat-move__facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-2);
  }

  .page-platform .plat-exits__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-platform .plat-hero__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.75fr);
    grid-template-areas:
      "crumb crumb"
      "statement figures";
    align-items: end;
    gap: var(--space-8);
    min-height: 78vh;
    padding-top: var(--space-4);
    padding-bottom: var(--section-y-lg);
  }

  .page-platform .plat-hero__crumb {
    grid-area: crumb;
  }

  .page-platform .plat-hero__statement {
    grid-area: statement;
  }

  .page-platform .plat-hero__figures {
    grid-area: figures;
  }

  .page-platform .plat-pains__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.8fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-platform .plat-pains__media {
    position: sticky;
    top: var(--space-8);
  }

  .page-platform .plat-move {
    grid-template-columns: 150px minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: start;
    gap: var(--space-4);
  }

  .page-platform .plat-move__facts {
    grid-template-columns: minmax(0, 1fr);
    align-self: stretch;
  }

  .page-platform .plat-outcomes__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: var(--space-8);
    align-items: center;
  }

  .page-platform .plat-field__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: var(--space-8);
    align-items: center;
  }

  .page-platform .plat-routes__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-3);
  }
}

@media (min-width: 1100px) {
  .page-platform .plat-hero__title {
    max-width: 12ch;
  }

  .page-platform .plat-outcomes__list {
    gap: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-platform .plat-pain,
  .page-platform .plat-move,
  .page-platform .plat-route,
  .page-platform .filter-btn {
    transition: none;
  }
}