.page-services {
  --step-marker: calc(var(--space-4) + var(--space-1));
  --step-rail-x: calc(var(--step-marker) / 2);
}

/* ---------- 首屏框景 ---------- */
.page-services .hero {
  padding-block: var(--space-6) var(--space-4);
}

.page-services .hero-frame {
  position: relative;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  padding: calc(var(--space-4) + var(--space-1)) var(--space-3) var(--space-3);
}

.page-services .hero-frame::before {
  content: "";
  position: absolute;
  inset-inline: 0;
  top: 0;
  height: var(--space-1);
  background-image: repeating-linear-gradient(
    to right,
    var(--color-line) 0 1px,
    transparent 1px var(--space-3)
  );
  pointer-events: none;
}

.page-services .hero-grid {
  display: grid;
  gap: var(--space-4);
}

.page-services .hero-lead .lede {
  margin-block: var(--space-2) 0;
  color: var(--color-ink-soft);
}

.page-services .hero-figure {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin: var(--space-4) 0 0;
  padding-left: var(--space-3);
  border-left: 3px solid var(--color-primary);
}

.page-services .figure-num {
  font-family: var(--font-heading);
  font-size: var(--text-figure);
  font-weight: var(--weight-heading);
  font-variant-numeric: tabular-nums;
  line-height: 0.95;
  color: var(--color-ink);
}

.page-services .figure-unit {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink-muted);
}

.page-services .hero-panel {
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}

.page-services .panel-title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--color-contrast-ink) 55%, transparent);
}

.page-services .panel-readout {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-services .panel-readout li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
  padding-block: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-services .panel-readout li:last-child {
  border-bottom: 0;
}

.page-services .panel-key {
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}

.page-services .panel-value {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  font-variant-numeric: tabular-nums;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
  white-space: nowrap;
}

.page-services .panel-value--accent {
  color: var(--color-contrast-accent);
}

.page-services .panel-note {
  margin: var(--space-2) 0 0;
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: color-mix(in srgb, var(--color-contrast-ink) 68%, transparent);
}

.page-services .hero-tag {
  margin: var(--space-3) 0 0;
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-services .hero-media {
  margin: var(--space-4) 0 0;
}

/* ---------- 媒体帧 ---------- */
.page-services .media-frame {
  position: relative;
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface-deep);
}

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

.page-services .media-tag {
  position: absolute;
  left: 0;
  bottom: 0;
  max-width: 100%;
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  background: var(--color-surface);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  line-height: 1.5;
  padding: var(--space-1) var(--space-2);
  border-top-right-radius: var(--radius-sm);
}

.page-services .media-tag-num {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-primary);
}

/* ---------- 文档布局 ---------- */
.page-services .doc-layout {
  display: grid;
  gap: var(--space-4);
  padding-bottom: var(--section-y-lg);
}

.page-services .toc-rail {
  border-top: var(--border-thin) solid var(--color-line);
  border-bottom: var(--border-thin) solid var(--color-line);
  padding-block: var(--space-2);
}

.page-services .toc-rail-title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
}

.page-services .toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: var(--space-1);
  overflow-x: auto;
}

.page-services .rail-link {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-left: 3px solid transparent;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink-soft);
  text-decoration: none;
  white-space: nowrap;
  transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.page-services .rail-link:hover,
.page-services .rail-link:focus-visible {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.page-services .rail-link.is-current {
  border-left-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.page-services .rail-index {
  font-size: var(--text-xs);
  font-variant-numeric: tabular-nums;
  color: var(--color-ink-muted);
}

.page-services .rail-link.is-current .rail-index {
  color: var(--color-primary);
}

/* ---------- 章节 ---------- */
.page-services .stage {
  padding-block: var(--space-6);
}

.page-services .stage:first-child {
  padding-top: var(--space-3);
}

.page-services .stage-title {
  margin: 0 0 var(--space-2);
  padding-left: var(--space-3);
  border-left: 3px solid var(--color-primary);
  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);
}

.page-services .stage-intro {
  margin: 0 0 var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-services .stage-body {
  display: grid;
  gap: var(--space-4);
}

/* ---------- 步骤刻度 ---------- */
.page-services .step-list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-services .step-list::before {
  content: "";
  position: absolute;
  left: var(--step-rail-x);
  top: var(--space-3);
  bottom: var(--space-3);
  width: var(--border-thin);
  background: var(--color-line);
}

.page-services .step {
  position: relative;
  display: grid;
  grid-template-columns: var(--step-marker) minmax(0, 1fr);
  gap: var(--space-2);
  padding-block: var(--space-2);
}

.page-services .step-num {
  position: relative;
  z-index: 1;
  width: var(--step-marker);
  height: var(--step-marker);
  display: grid;
  place-items: center;
  background: var(--color-surface-deep);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  font-variant-numeric: tabular-nums;
  color: var(--color-ink-soft);
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

.page-services .step:hover .step-num {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
}

.page-services .step:target .step-num {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-services .step-inner {
  background: var(--color-surface-alt);
  border-top: calc(var(--border-thin) * 2) solid var(--color-surface-deep);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3) var(--space-3);
}

.page-services .step-title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

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

.page-services .step-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
  margin: var(--space-2) 0 0;
}

.page-services .meta-item {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
  color: var(--color-ink);
}

.page-services .meta-key {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-services .step-note {
  margin: var(--space-2) 0 0;
  padding-left: var(--space-2);
  border-left: 3px solid var(--color-line);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-muted);
}

.page-services .verify-line {
  margin: var(--space-2) 0 0;
  padding: var(--space-1) var(--space-2);
  background: var(--color-surface-deep);
  border-top: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-services .verify-value {
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  word-break: break-all;
  color: var(--color-ink);
}

.page-services .step-inner .btn {
  margin-top: var(--space-2);
}

/* ---------- 折叠说明 ---------- */
.page-services .disclosure {
  margin-top: var(--space-3);
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-services .disclosure summary {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-heading);
  color: var(--color-primary);
}

.page-services .disclosure summary::-webkit-details-marker {
  display: none;
}

.page-services .disclosure summary::before {
  content: "+";
  font-size: var(--text-base);
  line-height: 1;
  color: var(--color-primary);
}

.page-services .disclosure[open] summary::before {
  content: "−";
}

.page-services .disclosure-body {
  margin-top: var(--space-2);
  padding-left: var(--space-3);
  border-left: 3px solid var(--color-primary-soft);
}

.page-services .disclosure-body p {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 数据表 ---------- */
.page-services .table-scroll {
  overflow-x: auto;
}

.page-services .data-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
}

.page-services .table-caption {
  caption-side: top;
  text-align: left;
  padding-bottom: var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-services .data-table th,
.page-services .data-table td {
  text-align: left;
  vertical-align: top;
  padding: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-services .data-table thead th {
  background: var(--color-surface-deep);
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.04em;
  color: var(--color-ink-soft);
  white-space: nowrap;
}

.page-services .data-table tbody tr:nth-child(even) {
  background: var(--color-surface-alt);
}

.page-services .data-table tbody tr:hover {
  background: var(--color-primary-soft);
}

.page-services .data-table tbody tr:hover td:first-child {
  box-shadow: inset 3px 0 0 var(--color-primary);
}

.page-services .data-table tbody th {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: var(--tracking-heading);
}

.page-services .data-table .num {
  font-family: var(--font-heading);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.page-services .trouble-table td:first-child {
  font-weight: 500;
}

/* ---------- 收束段 ---------- */
.page-services .closing {
  padding-block: var(--space-4) 0;
}

.page-services .closing .measure {
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 阶段二 / 阶段四 的中部图 ---------- */
.page-services .stage-media-block {
  margin-top: var(--space-2);
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 960px) {
  .page-services .hero {
    padding-block: var(--section-y-lg) var(--space-6);
  }

  .page-services .hero-frame {
    padding: var(--space-4) var(--space-4) var(--space-3);
  }

  .page-services .hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: var(--space-6);
  }

  .page-services .doc-layout {
    grid-template-columns: calc(var(--space-8) * 3 + var(--space-3)) minmax(0, 1fr);
    column-gap: var(--space-6);
    align-items: start;
  }

  .page-services .toc-rail {
    position: sticky;
    top: var(--space-4);
    border-top: 0;
    border-bottom: 0;
    padding-block: 0;
  }

  .page-services .toc-list {
    display: block;
    overflow: visible;
    border-left: var(--border-thin) solid var(--color-line);
  }

  .page-services .rail-link {
    border-radius: 0;
  }

  .page-services .stage-body--aside {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-services .stage--2 .stage-body,
  .page-services .stage--4 .stage-body {
    max-width: 92%;
  }

  .page-services .stage--3 .stage-body--aside {
    max-width: 88%;
  }

  .page-services .stage--4 .stage-body {
    max-width: 82%;
  }

  .page-services .closing {
    max-width: 82%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-services .rail-link,
  .page-services .step-num {
    transition-duration: 0ms;
  }
}