.page-partners {
  --partners-rail-w: 116px;
  --partners-figure-w: 232px;
}

/* ---------- 首屏：纵向刻度 ---------- */
.page-partners .partners-hero {
  position: relative;
  padding: calc(var(--space-8) + var(--space-4)) 0 var(--section-y);
  background: var(--color-surface);
}

.page-partners .breadcrumbs {
  margin-bottom: var(--space-6);
}

.page-partners .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-partners .breadcrumbs__item {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-partners .breadcrumbs__item a {
  color: var(--color-ink-soft);
  text-decoration: none;
}

.page-partners .breadcrumbs__sep {
  font-size: var(--text-xs);
  color: var(--color-line);
}

.page-partners .partners-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

/* 刻度尺 */
.page-partners .partners-hero__rail {
  display: flex;
  flex-direction: column;
}

.page-partners .rail__cap {
  display: block;
  margin-bottom: var(--space-3);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}

.page-partners .rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: var(--border-thin) solid var(--color-line);
}

.page-partners .rail__item {
  position: relative;
}

.page-partners .rail__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: calc(var(--space-2) + 0.72em);
  width: 11px;
  height: var(--border-thin);
  background: var(--color-primary);
}

.page-partners .rail__link {
  display: block;
  padding: var(--space-2) var(--space-2) var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-ink-soft);
  text-decoration: none;
  transition: color 180ms ease;
}

.page-partners .rail__link:hover,
.page-partners .rail__link:focus-visible {
  color: var(--color-accent);
}

/* 正文块 */
.page-partners .partners-hero__title {
  margin: var(--space-2) 0 var(--space-4);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-partners .partners-hero__lead {
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

.page-partners .partners-hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
}

/* 数字列 */
.page-partners .partners-hero__figures {
  display: grid;
  gap: var(--space-4);
}

.page-partners .hero-fig {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-partners .hero-fig .figure-value {
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

.page-partners .hero-fig__label {
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}

@media (min-width: 860px) {
  .page-partners .partners-hero__grid {
    grid-template-columns: var(--partners-rail-w) minmax(0, 1fr) var(--partners-figure-w);
    gap: var(--space-8);
    align-items: stretch;
    min-height: 58vh;
  }

  .page-partners .partners-hero__rail {
    grid-column: 1;
    grid-row: 1;
  }

  .page-partners .rail__list {
    display: flex;
    flex: 1;
    flex-direction: column;
    justify-content: space-between;
  }

  .page-partners .partners-hero__body {
    grid-column: 2;
    grid-row: 1;
    align-self: center;
  }

  .page-partners .partners-hero__figures {
    grid-column: 3;
    grid-row: 1;
    align-content: center;
  }
}

/* ---------- 时间线导语 ---------- */
.page-partners .timeline-intro {
  padding-top: 0;
}

.page-partners .timeline-intro__head {
  max-width: var(--measure);
}

.page-partners .timeline-intro h2 {
  margin: var(--space-2) 0 var(--space-4);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-partners .timeline-intro__lead {
  color: var(--color-ink-soft);
}

/* ---------- 时间线阶段 ---------- */
.page-partners .phase {
  padding: var(--section-y) 0;
  background: var(--color-surface);
}

.page-partners .phase--deep {
  background: var(--color-surface-deep);
}

.page-partners .phase--dark {
  background: var(--color-contrast-surface);
}

.page-partners .phase__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.page-partners .phase__meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.page-partners .phase__no {
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-primary);
}

.page-partners .phase__span {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

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

.page-partners .phase__pairs {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

.page-partners .phase__label {
  display: block;
  margin-bottom: var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.page-partners .phase__text {
  margin: 0;
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

.page-partners .phase--dark .phase__no {
  color: var(--color-contrast-accent);
}

.page-partners .phase--dark .phase__span,
.page-partners .phase--dark .phase__label {
  color: color-mix(in srgb, var(--color-contrast-ink) 58%, transparent);
}

.page-partners .phase--dark .phase__title {
  color: var(--color-contrast-ink);
}

.page-partners .phase--dark .phase__text {
  color: color-mix(in srgb, var(--color-contrast-ink) 88%, transparent);
}

@media (min-width: 720px) {
  .page-partners .phase__pairs {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }
}

@media (min-width: 860px) {
  .page-partners .phase__inner {
    grid-template-columns: 176px minmax(0, 1fr);
    gap: var(--space-8);
  }
}

/* ---------- 协作分类 ---------- */
.page-partners .cat--alt {
  background: var(--color-surface-alt);
}

.page-partners .cat__head {
  max-width: var(--measure);
}

.page-partners .cat__head h2 {
  margin: var(--space-2) 0 var(--space-4);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-3xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-partners .cat__lead {
  color: var(--color-ink-soft);
}

.page-partners .cat__figure {
  margin: var(--space-6) 0 var(--space-8);
}

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

/* 协作单元目录 */
.page-partners .units {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-partners .unit {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
}

.page-partners .unit + .unit {
  position: relative;
  margin-top: var(--space-6);
  padding-top: var(--space-6);
}

.page-partners .unit + .unit::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 40px;
  height: var(--border-thin);
  background: var(--color-primary);
}

.page-partners .unit__no {
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  color: var(--color-ink-muted);
}

.page-partners .unit__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);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-partners .unit__text {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  color: var(--color-ink-soft);
}

.page-partners .unit__bound {
  margin: var(--space-3) 0 0;
}

@media (min-width: 720px) {
  .page-partners .unit {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: var(--space-4);
  }

  .page-partners .unit__no {
    padding-top: 0.35em;
  }

  .page-partners .cat__figure--narrow {
    width: 58%;
    margin-left: auto;
    margin-right: 0;
  }
}

/* ---------- 启动路径 ---------- */
.page-partners .start {
  background: var(--color-surface);
}

.page-partners .lanes {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-partners .lane {
  padding: var(--space-4);
  background: var(--color-surface-alt);
  border-radius: var(--radius-sm);
}

.page-partners .lanes .lane:nth-child(2) {
  background: color-mix(in srgb, var(--color-surface-alt) 74%, var(--color-primary-soft));
}

.page-partners .lanes .lane:nth-child(3) {
  background: color-mix(in srgb, var(--color-surface-alt) 52%, var(--color-primary-soft));
}

.page-partners .lanes .lane:nth-child(4) {
  background: var(--color-primary-soft);
}

.page-partners .lane__no {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}

.page-partners .lane__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-partners .lane__text {
  margin: 0;
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

.page-partners .lane__prep {
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-partners .lane__prepLabel {
  display: inline-block;
  margin-right: var(--space-1);
  padding: 0 var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-accent);
  background: color-mix(in srgb, var(--color-highlight) 70%, transparent);
}

@media (min-width: 860px) {
  .page-partners .lanes {
    gap: var(--space-6);
  }

  .page-partners .lane {
    padding: var(--space-6);
  }

  .page-partners .lanes .lane:nth-child(1) {
    width: 100%;
  }

  .page-partners .lanes .lane:nth-child(2) {
    width: 92%;
  }

  .page-partners .lanes .lane:nth-child(3) {
    width: 84%;
  }

  .page-partners .lanes .lane:nth-child(4) {
    width: 76%;
  }
}

/* 出口 */
.page-partners .start__exit {
  margin-top: var(--section-y);
  padding-top: var(--space-6);
  position: relative;
}

.page-partners .start__exit::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 88px;
  height: var(--border-thin);
  background: var(--color-primary);
}

.page-partners .start__exitText {
  margin: 0 0 var(--space-4);
  max-width: var(--measure);
  color: var(--color-ink-soft);
}

.page-partners .start__exitLinks {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* 焦点可见 */
.page-partners a:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .page-partners .rail__link {
    transition: none;
  }
}