.page-platform {
  --plat-tilt: 3deg;
  --plat-slash: 40px;
}

/* ---------- 首屏 ---------- */
.page-platform .plat-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding: var(--space-6) 0 var(--space-8);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--plat-slash)), 0 100%);
}

.page-platform .plat-hero__media {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-platform .plat-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.24;
}

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

.page-platform .plat-hero__inner {
  position: relative;
}

.page-platform .plat-hero .breadcrumbs,
.page-platform .plat-hero .breadcrumbs span {
  color: var(--color-contrast-ink);
  opacity: 0.7;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
}

.page-platform .plat-hero .breadcrumbs a {
  color: var(--color-contrast-accent);
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
}

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

.page-platform .plat-hero__eyebrow {
  margin: var(--space-3) 0 0;
  color: var(--color-contrast-accent);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
}

.page-platform .plat-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-contrast-ink);
  margin: var(--space-2) 0 var(--space-3);
  max-width: 17ch;
}

.page-platform .plat-hero__lede {
  margin: 0 0 var(--space-6);
  max-width: 54ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.82;
}

.page-platform .plat-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  padding-top: var(--space-4);
  border-top: var(--border-thin) dashed var(--color-contrast-line);
}

.page-platform .plat-stat {
  min-width: 0;
}

.page-platform .plat-stat__num {
  display: block;
  font-size: var(--text-figure);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-contrast-accent);
}

.page-platform .plat-stat__unit {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-contrast-ink);
}

.page-platform .plat-stat__claim {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  line-height: 1.65;
  color: var(--color-contrast-ink);
  opacity: 0.7;
}

.page-platform .plat-hero__sticker {
  display: inline-block;
  margin-top: var(--space-6);
  transform: rotate(calc(-1 * var(--plat-tilt)));
}

/* ---------- 段落索引 ---------- */
.page-platform .plat-toc {
  background: var(--color-surface-alt);
  border-bottom: var(--border-thin) dashed var(--color-line);
  padding: var(--space-3) 0;
}

.page-platform .plat-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
}

.page-platform .plat-toc__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-soft);
  text-decoration: none;
  border-bottom: var(--border-thin) dashed var(--color-line);
  padding-bottom: 2px;
  transition: color 140ms ease, border-color 140ms ease;
}

.page-platform .plat-toc__link:hover,
.page-platform .plat-toc__link:focus-visible {
  color: var(--color-focus);
  border-bottom-color: var(--color-focus);
}

.page-platform .plat-toc__link[aria-current="true"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
  font-weight: var(--weight-heading);
}

/* ---------- 三段主张 ---------- */
.page-platform .plat-part {
  position: relative;
  padding: var(--section-y) 0;
}

.page-platform .plat-part::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: var(--border-thin);
  background-image: repeating-linear-gradient(90deg, var(--color-line) 0 6px, transparent 6px 14px);
}

.page-platform .plat-part::after {
  content: "";
  position: absolute;
  top: calc(-1 * var(--border-thin));
  left: 0;
  width: 72px;
  height: calc(var(--border-thick) + var(--border-thin));
  background: var(--color-primary);
}

.page-platform .plat-part__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  align-items: start;
}

.page-platform .plat-part__body {
  order: 1;
  min-width: 0;
}

.page-platform .plat-part__media {
  order: 2;
  min-width: 0;
}

.page-platform .plat-part__tag {
  display: inline-block;
  margin-bottom: var(--space-2);
  transform: rotate(calc(-1 * var(--plat-tilt)));
}

.page-platform .plat-part__title {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  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);
  padding-left: var(--space-2);
  border-left: var(--border-thick) solid var(--color-primary);
}

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

.page-platform .plat-part__text a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-primary-soft);
}

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

.page-platform .plat-part__verdict {
  margin: var(--space-4) 0 0;
  max-width: var(--measure);
  padding: var(--space-2) var(--space-3);
  background: var(--color-highlight);
  border-left: var(--border-thick) solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: 1.6;
  color: var(--color-ink);
}

.page-platform .plat-part__more {
  margin-top: var(--space-3);
  max-width: var(--measure);
}

.page-platform .plat-part__more summary {
  cursor: pointer;
  padding: var(--space-1) 0;
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-primary);
}

.page-platform .plat-part__more summary:hover,
.page-platform .plat-part__more summary:focus-visible {
  color: var(--color-focus);
}

.page-platform .plat-part__more .disclosure__body p {
  margin: var(--space-2) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-platform .plat-part__more .disclosure__body a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-primary-soft);
}

/* 图片帧 */
.page-platform .plat-figure {
  margin: 0;
}

.page-platform .plat-figure .media-frame {
  border-radius: var(--radius-md);
  border: var(--border-thin) solid var(--color-line);
  box-shadow: var(--shadow-2);
  overflow: hidden;
}

.page-platform .plat-figure .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  cursor: zoom-in;
}

.page-platform .plat-figure img[data-zoomed] {
  cursor: zoom-out;
}

.page-platform .plat-figure__cap {
  margin-top: var(--space-2);
  max-width: 38ch;
  font-size: var(--text-xs);
  line-height: 1.65;
  color: var(--color-ink-muted);
}

/* ---------- 支撑数字 ---------- */
.page-platform .plat-facts {
  padding: var(--section-y-lg) 0;
  background: var(--color-surface-alt);
}

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

.page-platform .plat-facts__title {
  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-ink);
  margin: var(--space-2) 0 var(--space-2);
  max-width: 30ch;
}

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

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

.page-platform .plat-meter {
  min-width: 0;
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-platform .plat-meter__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-2);
}

.page-platform .plat-meter__num {
  font-size: var(--text-2xl);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--color-accent);
}

.page-platform .plat-meter__label {
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
}

.page-platform .plat-meter__bar {
  position: relative;
  display: block;
  height: calc(var(--border-thick) * 3);
  margin: var(--space-2) 0 var(--space-1);
  background: var(--color-surface-deep);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-platform .plat-meter__bar::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--fill, 50%);
  background: var(--color-primary);
  transition: width 320ms cubic-bezier(0.2, 0.7, 0.3, 1);
}

.page-platform .plat-meter:hover .plat-meter__bar::after {
  background: var(--color-accent);
}

.page-platform .plat-meter__hint {
  margin: 0;
  font-size: var(--text-xs);
  line-height: 1.65;
  color: var(--color-ink-muted);
  transition: color 140ms ease;
}

.page-platform .plat-meter:hover .plat-meter__hint {
  color: var(--color-ink-soft);
}

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

.page-platform .plat-facts__foot a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: var(--border-thin) solid var(--color-primary-soft);
}

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

/* ---------- 下一步 ---------- */
.page-platform .plat-next {
  padding: var(--section-y) 0 var(--section-y-lg);
  background: var(--color-surface);
}

.page-platform .plat-next__title {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  margin: var(--space-2) 0 var(--space-2);
  max-width: 22ch;
}

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

.page-platform .plat-next__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-platform .plat-next__card {
  position: relative;
  display: block;
  padding: var(--space-4) var(--space-3) var(--space-3);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-2);
  text-decoration: none;
  color: inherit;
  transition: transform 140ms cubic-bezier(0.2, 0.7, 0.3, 1), border-color 140ms ease;
}

.page-platform .plat-next__card:hover,
.page-platform .plat-next__card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--color-primary);
}

.page-platform .plat-next__card:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: var(--border-thick);
}

.page-platform .plat-next__tag {
  position: absolute;
  top: calc(-1 * var(--space-1));
  left: var(--space-3);
  transform: rotate(calc(-1 * var(--plat-tilt)));
}

.page-platform .plat-next__card-title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: 1.4;
  color: var(--color-ink);
}

.page-platform .plat-next__card-text {
  margin: 0 0 var(--space-3);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-platform .plat-next__go {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  border-bottom: var(--border-thin) dashed var(--color-accent);
  padding-bottom: 2px;
}

.page-platform .plat-next__foot {
  margin: var(--space-6) 0 0;
  max-width: var(--measure);
  padding-top: var(--space-3);
  border-top: var(--border-thin) dashed var(--color-line);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-platform .plat-next__foot .mono {
  color: var(--color-ink);
  font-weight: var(--weight-heading);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-platform .plat-toc__link {
    font-size: var(--text-sm);
  }

  .page-platform .plat-facts__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4) var(--space-6);
  }
}

@media (min-width: 768px) {
  .page-platform .plat-hero {
    padding: var(--space-8) 0 var(--space-8);
  }

  .page-platform .plat-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-6);
  }

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

@media (min-width: 900px) {
  .page-platform .plat-part__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
  }

  .page-platform .plat-part__grid--flip {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-platform .plat-part__grid--narrow {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }

  .page-platform .plat-part__body--lift {
    margin-top: calc(var(--space-3) * -1);
  }

  .page-platform .plat-part__media .media-frame--tall {
    max-width: 360px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-platform .plat-next__card,
  .page-platform .plat-meter__bar::after,
  .page-platform .plat-toc__link,
  .page-platform .plat-meter__hint {
    transition: none;
  }

  .page-platform .plat-next__card:hover,
  .page-platform .plat-next__card:focus-visible {
    transform: none;
  }
}

.page-platform {
  --fill: currentColor;
}