.page-services {
  --ps-node: calc(var(--space-1) * 4);
  --ps-rail-x: calc(var(--space-1) * 2);
  --ps-panel-radius: calc(var(--space-8) * 1.5);
  --ps-card-radius: calc(var(--space-6) * 1.5);
}

.page-services__crumb {
  padding-top: var(--space-4);
  padding-bottom: var(--space-3);
}

.page-services .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.page-services .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: var(--space-2);
  color: var(--color-line);
}

.page-services .breadcrumb__item a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px dotted currentColor;
}

.page-services .breadcrumb__item a:hover,
.page-services .breadcrumb__item a:focus-visible {
  color: var(--color-accent);
}

/* ---------- 首屏 ---------- */

.page-services .hero-lab {
  padding-bottom: var(--space-6);
}

.page-services .hero-lab__panel {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-radius: var(--ps-panel-radius);
  padding: var(--space-6) var(--space-4);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

.page-services .hero-lab__eyebrow {
  color: var(--color-contrast-accent);
  font-family: var(--font-mono);
  letter-spacing: 0.14em;
}

.page-services .hero-lab__title {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.04;
  letter-spacing: var(--tracking-heading);
  margin: var(--space-3) 0 0;
  color: var(--color-contrast-ink);
  max-width: 14ch;
}

.page-services .hero-lab__lead {
  margin: var(--space-4) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

.page-services .hero-lab__figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  margin-top: var(--space-6);
}

.page-services .figure {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3) var(--space-4);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--ps-card-radius);
  background-color: color-mix(in srgb, var(--color-contrast-ink) 6%, transparent);
}

.page-services .figure__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-4xl);
  font-weight: var(--weight-heading);
  line-height: 1;
  color: var(--color-contrast-ink);
}

.page-services .figure__label {
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: color-mix(in srgb, var(--color-contrast-ink) 68%, transparent);
}

.page-services .hero-lab__media {
  margin: var(--space-6) 0 0;
  border-radius: var(--ps-card-radius);
  overflow: hidden;
  border: var(--border-thin) solid var(--color-contrast-line);
}

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

.page-services .railcap {
  margin-top: var(--space-6);
}

.page-services .railcap__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-services .railcap__list > li {
  min-width: 0;
}

.page-services .railcap__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: calc(var(--space-1) * 0.7) var(--space-3) calc(var(--space-1) * 0.7) calc(var(--space-1) * 0.7);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-pill);
  background-color: color-mix(in srgb, var(--color-contrast-ink) 5%, transparent);
  color: var(--color-contrast-ink);
  text-decoration: none;
  transition: background-color 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.page-services .railcap__num {
  flex: none;
  display: grid;
  place-items: center;
  width: calc(var(--space-1) * 5);
  height: calc(var(--space-1) * 5);
  border-radius: var(--radius-pill);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
}

.page-services .railcap__name {
  font-size: var(--text-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.page-services .railcap__item:hover,
.page-services .railcap__item:focus-visible {
  background-color: color-mix(in srgb, var(--color-contrast-ink) 13%, transparent);
  border-color: var(--color-contrast-accent);
  box-shadow: var(--shadow-1);
}

/* ---------- 通用标题 ---------- */

.page-services .flow-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 0;
  max-width: 30ch;
}

.page-services .flow-lead {
  margin-top: var(--space-3);
  max-width: var(--measure);
  color: var(--color-ink-soft);
  line-height: var(--leading-body);
}

.page-services .eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-primary);
  margin: 0;
}

/* ---------- 步骤轨道 ---------- */

.page-services .stage {
  border-radius: var(--ps-panel-radius);
  padding: var(--space-6) var(--space-4);
  margin-top: var(--space-6);
}

.page-services .stage--a {
  background-color: var(--color-surface-alt);
}

.page-services .stage--b {
  background-color: var(--color-surface-deep);
}

.page-services .stage--c {
  background-color: var(--color-primary-soft);
}

.page-services .stage__head {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-bottom: var(--space-3);
  border-bottom: 1px dotted var(--color-line);
}

.page-services .stage__label {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.page-services .stage__badge {
  display: inline-block;
  padding: calc(var(--space-1) * 0.6) var(--space-3);
  border-radius: var(--radius-pill);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
}

.page-services .stage__badge--accent {
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-services .stage__title {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  margin: 0;
  color: var(--color-ink);
}

.page-services .stage__meta {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-services .rail {
  position: relative;
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-4);
}

.page-services .step {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2);
  scroll-margin-top: var(--space-8);
}

.page-services .step__node {
  width: var(--ps-node);
  height: var(--ps-node);
  border-radius: var(--radius-pill);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  box-shadow: var(--shadow-1);
  transition: box-shadow 0.2s ease;
}

.page-services .step:hover .step__node {
  box-shadow: var(--shadow-2);
}

.page-services .step__body {
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--ps-card-radius);
  background-color: var(--color-surface);
  padding: var(--space-4);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-services .step__body:hover {
  border-color: color-mix(in srgb, var(--color-primary) 45%, var(--color-line));
  box-shadow: 0 0 22px color-mix(in srgb, var(--color-primary) 18%, transparent);
}

.page-services .step__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  margin: 0;
  color: var(--color-ink);
  max-width: 34ch;
}

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

.page-services .step__field a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--color-primary);
}

.page-services .step__field a:hover,
.page-services .step__field a:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.page-services .step__key {
  display: inline-block;
  margin-right: var(--space-2);
  padding: 0 var(--space-2);
  border-radius: var(--radius-pill);
  border: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 42%, transparent);
  background-color: var(--color-primary-soft);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-primary);
  vertical-align: calc(var(--space-1) * 0.3);
}

.page-services .step__figure {
  margin: var(--space-3) 0 0;
  border-radius: var(--ps-card-radius);
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
}

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

.page-services .step__figure .media__caption {
  padding: var(--space-2) 0 0;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

.page-services .step__more {
  margin-top: var(--space-3);
}

.page-services .step__result {
  margin: var(--space-3) 0 0;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--ps-card-radius);
  background-color: var(--color-primary-soft);
  border-left: calc(var(--space-1) * 0.6) solid var(--color-primary);
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-services .step__result .mono {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-right: var(--space-1);
}

/* ---------- 结果确认清单 ---------- */

.page-services .check-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-4);
  align-items: start;
}

.page-services .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px dotted var(--color-line);
}

.page-services .checklist__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-2);
  align-items: start;
  padding: var(--space-3) 0;
  border-bottom: 1px dotted var(--color-line);
}

.page-services .checklist__box {
  position: relative;
  flex: none;
  width: calc(var(--space-1) * 2.6);
  height: calc(var(--space-1) * 2.6);
  margin-top: calc(var(--space-1) * 0.4);
  border: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 55%, transparent);
  border-radius: calc(var(--space-1) * 0.8);
}

.page-services .checklist__box::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 46%;
  width: 34%;
  height: 58%;
  border-right: calc(var(--space-1) * 0.3) solid color-mix(in srgb, var(--color-primary) 60%, transparent);
  border-bottom: calc(var(--space-1) * 0.3) solid color-mix(in srgb, var(--color-primary) 60%, transparent);
  transform: translate(-50%, -58%) rotate(45deg);
}

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

.page-services .checklist__idx {
  display: inline-block;
  margin-right: var(--space-2);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

.page-services .check-media {
  margin: 0;
  border-radius: var(--ps-card-radius);
  overflow: hidden;
  border: var(--border-thin) solid var(--color-line);
}

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

.page-services .check-media .media__caption {
  padding: var(--space-2) 0 0;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

/* ---------- 中断点 ---------- */

.page-services .bp-list {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
  counter-reset: bp;
}

.page-services .bp {
  display: grid;
  gap: var(--space-1);
  padding: var(--space-4);
  border-radius: var(--ps-card-radius);
  border: var(--border-thin) solid var(--color-line);
  border-left: calc(var(--space-1) * 0.8) solid var(--color-accent);
  background-color: var(--color-surface-alt);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.page-services .bp:hover {
  background-color: var(--color-surface-deep);
  border-color: color-mix(in srgb, var(--color-accent) 35%, var(--color-line));
}

.page-services .bp__head {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.page-services .bp__code {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

.page-services .bp__title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  margin: 0;
  color: var(--color-ink);
}

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

.page-services .bp__back {
  margin: var(--space-1) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-services .bp__back a {
  font-family: var(--font-mono);
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--color-primary);
}

.page-services .bp__back a:hover,
.page-services .bp__back a:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ---------- 子页入口 ---------- */

.page-services__next {
  padding-bottom: var(--section-y-lg);
}

.page-services .next-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  padding: var(--space-6) var(--space-4);
  border-radius: var(--ps-panel-radius);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  box-shadow: var(--shadow-1);
}

.page-services .next-panel__eyebrow {
  color: var(--color-contrast-accent);
}

.page-services .next-panel__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);
  margin: var(--space-2) 0 0;
  color: var(--color-contrast-ink);
  max-width: 24ch;
}

.page-services .next-panel__desc {
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

.page-services .next-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.page-services .next-panel__side-label {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
}

.page-services .next-panel__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-1);
  border-top: 1px dotted var(--color-contrast-line);
}

.page-services .next-panel__list li {
  display: grid;
  gap: calc(var(--space-1) * 0.4);
  padding: var(--space-2) 0;
  border-bottom: 1px dotted var(--color-contrast-line);
}

.page-services .next-panel__list a {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-contrast-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--color-contrast-accent);
  justify-self: start;
}

.page-services .next-panel__list a:hover,
.page-services .next-panel__list a:focus-visible {
  color: var(--color-contrast-accent);
}

.page-services .next-panel__list span {
  font-size: var(--text-xs);
  line-height: 1.6;
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}

/* ---------- 焦点可见性 ---------- */

.page-services a:focus-visible,
.page-services summary:focus-visible {
  outline: calc(var(--space-1) * 0.3) solid var(--color-focus);
  outline-offset: calc(var(--space-1) * 0.4);
  border-radius: var(--radius-pill);
}

/* ---------- 响应式 ---------- */

@media (min-width: 600px) {
  .page-services .hero-lab__panel {
    padding: var(--space-8) var(--space-6);
  }

  .page-services .hero-lab__figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-services .railcap__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-services .stage {
    padding: var(--space-8) var(--space-6);
  }

  .page-services .stage__head {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .page-services .step__body {
    padding: var(--space-6);
  }

  .page-services .next-panel {
    padding: var(--space-8) var(--space-6);
  }
}

@media (min-width: 720px) {
  .page-services__crumb {
    padding-top: var(--space-6);
  }

  .page-services .rail::before {
    content: "";
    position: absolute;
    left: calc(var(--ps-rail-x) - 1px);
    top: var(--space-2);
    bottom: var(--space-2);
    width: 2px;
    background-image: repeating-linear-gradient(
      to bottom,
      var(--color-line) 0 4px,
      transparent 4px 11px
    );
  }

  .page-services .step {
    grid-template-columns: var(--ps-node) minmax(0, 1fr);
    gap: var(--space-3);
  }

  .page-services .bp-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-services .railcap__list {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

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

  .page-services .next-panel {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: var(--space-8);
  }

  .page-services .step__body {
    padding: var(--space-6) var(--space-8);
  }

  .page-services .stage {
    padding: var(--space-8);
  }
}