/* ===== 平台服务页 · page-platform ===== */
.page-platform {
  --pf-measure: 58ch;
}

.page-platform .pf-crumbs {
  margin-bottom: var(--space-6);
}

.page-platform .pf-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--text-xs);
  color: var(--color-contrast-ink);
}

.page-platform .pf-crumbs li + li::before {
  content: "/";
  margin-right: var(--space-1);
  opacity: 0.45;
}

.page-platform .pf-crumbs a {
  color: inherit;
  text-decoration: none;
  border-bottom: var(--border-thin) solid transparent;
  transition: border-color 180ms ease;
}

.page-platform .pf-crumbs a:hover,
.page-platform .pf-crumbs a:focus-visible {
  border-bottom-color: currentColor;
}

/* ---------- 首屏 ---------- */
.page-platform .pf-hero {
  position: relative;
  overflow: hidden;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-top: calc(var(--header-h) + var(--space-6));
  padding-bottom: var(--space-8);
}

.page-platform .pf-hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.32;
}

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

.page-platform .pf-hero__inner {
  position: relative;
  z-index: 1;
}

.page-platform .pf-hero__eyebrow {
  color: var(--color-contrast-accent);
}

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

.page-platform .pf-hero__lead {
  max-width: 46ch;
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  margin: 0;
}

.page-platform .pf-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) var(--space-3);
  margin: var(--space-8) 0 0;
  padding: var(--space-6) 0 0;
  list-style: none;
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-platform .pf-figure__value {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 0.95;
  color: var(--color-contrast-accent);
}

.page-platform .pf-figure--alt .pf-figure__value {
  color: var(--color-highlight);
}

.page-platform .pf-figure__label {
  display: block;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-contrast-ink);
  opacity: 0.82;
  max-width: 24ch;
}

/* ---------- 通用章节 ---------- */
.page-platform .pf-sec {
  padding-top: var(--section-y-lg);
  padding-bottom: var(--section-y-lg);
}

.page-platform .pf-head {
  max-width: var(--pf-measure);
}

.page-platform .pf-head .section__lead {
  margin-bottom: 0;
}

/* ---------- 第一组：左右分栏 ---------- */
.page-platform .pf-split {
  display: grid;
  gap: var(--space-6);
}

.page-platform .pf-split__figure {
  margin: 0;
}

.page-platform .pf-split__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-platform .pf-split__figure .figure__caption {
  margin-top: var(--space-2);
}

/* ---------- 步骤结构：难处 / 做法 / 得到 ---------- */
.page-platform .pf-steps {
  display: grid;
  gap: var(--space-6);
  margin: var(--space-8) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: pf-step;
}

.page-platform .pf-step {
  position: relative;
  padding-left: var(--space-6);
}

.page-platform .pf-step::before {
  counter-increment: pf-step;
  content: counter(pf-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.1em;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  letter-spacing: 0.04em;
}

.page-platform .pf-step__need {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

.page-platform .pf-step__how {
  display: inline-block;
  margin: 0 0 var(--space-2);
  padding: 4px var(--space-2);
  border-radius: var(--radius-pill);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.page-platform .pf-step__get {
  margin: 0;
  max-width: var(--pf-measure);
  color: var(--color-ink);
  line-height: var(--leading-body);
}

.page-platform .pf-mark {
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

/* ---------- 标签页 ---------- */
.page-platform .pf-tabs {
  margin-top: var(--space-8);
}

.page-platform .pf-tabs__cap {
  margin: 0 0 var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-platform .tablist {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.page-platform .tab {
  appearance: none;
  border: 0;
  cursor: pointer;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-ink-soft);
  font-family: inherit;
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  transition: background-color 180ms ease, color 180ms ease;
}

.page-platform .tab[aria-selected="true"] {
  background: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-platform .tab:hover {
  color: var(--color-ink);
}

.page-platform .tab[aria-selected="true"]:hover {
  color: var(--color-primary-ink);
}

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

.page-platform .pf-panel {
  max-width: var(--pf-measure);
}

.page-platform .pf-panel__lead {
  margin: 0 0 var(--space-4);
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

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

.page-platform .pf-checks li {
  display: grid;
  gap: var(--space-1);
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-platform .pf-checks__k {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

/* ---------- 第三组配图 ---------- */
.page-platform .pf-wide-figure {
  margin: 0 0 var(--space-8);
}

.page-platform .pf-wide-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
}

.page-platform .pf-wide-figure .figure__caption {
  margin-top: var(--space-2);
}

/* ---------- 出口 ---------- */
.page-platform .pf-exit-sec {
  padding-bottom: var(--section-y-lg);
}

.page-platform .pf-exits {
  display: grid;
  gap: var(--space-4);
  margin: var(--space-8) 0 0;
  padding: 0;
  list-style: none;
}

.page-platform .pf-exit {
  display: grid;
  gap: var(--space-2);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-1);
  color: inherit;
  text-decoration: none;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.page-platform .pf-exit:hover,
.page-platform .pf-exit:focus-visible {
  transform: translateY(-3px);
  box-shadow: var(--shadow-2);
}

.page-platform .pf-exit:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.page-platform .pf-exit__title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-platform .pf-exit__desc {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-platform .pf-note {
  max-width: var(--pf-measure);
  margin: var(--space-8) 0 0;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-platform .pf-note a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.page-platform .pf-note a:hover {
  text-decoration-thickness: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-platform .pf-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-platform .pf-figure:nth-child(2) {
    transform: translateY(var(--space-3));
  }

  .page-platform .pf-figure:nth-child(4) {
    transform: translateY(var(--space-1));
  }

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

@media (min-width: 960px) {
  .page-platform .pf-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-platform .pf-split__figure {
    margin-top: var(--space-8);
  }

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

  .page-platform .pf-steps--cols .pf-step__get {
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-platform .pf-exit,
  .page-platform .pf-crumbs a,
  .page-platform .tab {
    transition: none;
  }

  .page-platform .pf-figure:nth-child(2),
  .page-platform .pf-figure:nth-child(4) {
    transform: none;
  }

  .page-platform .pf-exit:hover,
  .page-platform .pf-exit:focus-visible {
    transform: none;
  }
}