.page-partners {
  --pt-node-w: 118px;
  --pt-line: var(--color-line);
  display: block;
}

/* ============ 首屏地层 ============ */
.page-partners .partners-hero {
  position: relative;
  overflow: hidden;
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.page-partners .partners-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

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

.page-partners .partners-hero__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
}

.page-partners .partners-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: var(--space-4);
  padding-bottom: var(--space-8);
}

.page-partners .partners-crumb .breadcrumb__link {
  color: var(--color-contrast-ink);
}

.page-partners .partners-crumb .breadcrumb__current {
  color: var(--color-contrast-accent);
}

.page-partners .partners-hero__eyebrow {
  margin: var(--space-6) 0 var(--space-2);
  color: var(--color-contrast-accent);
  letter-spacing: 0.1em;
}

.page-partners .partners-hero__title {
  margin: 0 0 var(--space-3);
  max-width: 19ch;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.02;
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-partners .partners-hero__lede {
  margin: 0 0 var(--space-4);
  max-width: 60ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

/* 横向阶段刻度 */
.page-partners .partners-track__scroll {
  margin-top: var(--space-6);
  overflow-x: auto;
  overflow-y: hidden;
  border-top: var(--border-thick) solid var(--color-contrast-line);
  border-bottom: var(--border-thick) solid var(--color-contrast-line);
}

.page-partners .partners-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  min-width: max-content;
}

.page-partners .partners-track__node {
  position: relative;
  flex: 0 0 var(--pt-node-w);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: calc(var(--space-3) + 4px) var(--space-2) var(--space-3);
  border-right: var(--border-thin) solid var(--color-contrast-line);
}

.page-partners .partners-track__node:last-child {
  border-right: 0;
}

.page-partners .partners-track__node::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 8px;
  background-color: var(--color-primary);
}

.page-partners .partners-track__node:nth-child(even)::before {
  background-color: var(--color-accent);
}

.page-partners .partners-track__index {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-contrast-accent);
}

.page-partners .partners-track__name {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  line-height: 1.3;
  color: var(--color-contrast-ink);
}

/* 首屏数字 */
.page-partners .partners-figures {
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

.page-partners .partners-figures__item {
  padding-left: var(--space-3);
  border-left: var(--border-thick) solid var(--color-primary);
}

.page-partners .partners-figures__item:nth-child(2) {
  border-left-color: var(--color-accent);
}

.page-partners .partners-figures__label {
  margin: 0 0 var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-contrast-accent);
}

.page-partners .partners-figures__value {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 0.95;
  color: var(--color-contrast-ink);
}

.page-partners .partners-figures__unit {
  font-size: var(--text-sm);
  color: var(--color-contrast-accent);
}

/* ============ 章节抬头 ============ */
.page-partners .partners-head {
  display: grid;
  gap: var(--space-2);
  max-width: 72ch;
}

.page-partners .partners-head__index {
  display: inline-block;
  width: fit-content;
  padding: 2px var(--space-2);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  border-radius: var(--radius-sm);
}

.page-partners .partners-head__title {
  margin: 0;
  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-partners .partners-head__note {
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-partners .partners-head--light .partners-head__title {
  color: var(--color-contrast-ink);
}

.page-partners .partners-head--light .partners-head__note {
  color: var(--color-contrast-accent);
}

/* ============ 01 协作角色 ============ */
.page-partners .partners-roles {
  background-color: var(--color-surface);
}

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

.page-partners .roles-fig {
  margin: 0;
}

.page-partners .roles-fig .figure-frame__media {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-partners .role-block {
  padding: var(--space-4) var(--space-3);
  background-color: var(--color-surface-alt);
  border-top: var(--border-thick) solid var(--color-primary);
  border-radius: var(--radius-md);
}

.page-partners .role-block:nth-of-type(2) {
  border-top-color: var(--color-accent);
  background-color: var(--color-surface-deep);
}

.page-partners .role-block:nth-of-type(3) {
  border-top-color: var(--color-accent);
}

.page-partners .role-block:nth-of-type(4) {
  background-color: var(--color-surface-deep);
}

.page-partners .role-block__title {
  margin: var(--space-3) 0 var(--space-2);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-partners .role-block__text {
  margin: 0 0 var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

.page-partners .role-block__deliver {
  margin: 0 0 var(--space-2);
  padding-top: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.page-partners .role-block__list {
  list-style: none;
  margin: 0 0 var(--space-3);
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-soft);
}

.page-partners .role-block__list li {
  padding: var(--space-1) 0;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-partners .role-block__status {
  margin: 0;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

/* ============ 02 阶段时间线 ============ */
.page-partners .partners-filters {
  margin: var(--space-6) 0 var(--space-6);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.page-partners .partners-filter {
  appearance: none;
  padding: var(--space-1) var(--space-2);
  background-color: var(--color-surface);
  border: var(--border-thin) solid var(--color-ink-muted);
  border-radius: var(--radius-pill);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  cursor: pointer;
}

.page-partners .partners-filter[aria-pressed="true"] {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-ink);
}

.page-partners .partners-filter:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: 2px;
}

.page-partners .stages {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-partners .stage {
  position: relative;
  padding-left: var(--space-6);
  padding-bottom: var(--space-6);
  transition: opacity 200ms ease-out;
}

.page-partners .stage::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 0;
  bottom: 0;
  width: var(--border-thick);
  background-color: var(--pt-line);
}

.page-partners .stage:last-child::before {
  bottom: auto;
  height: 24px;
}

.page-partners .stage__marker {
  position: absolute;
  left: 0;
  top: 3px;
  width: 17px;
  height: 17px;
  background-color: var(--color-primary);
  border-radius: var(--radius-sm);
}

.page-partners .stage:nth-child(even) .stage__marker {
  background-color: var(--color-accent);
}

.page-partners .stage.is-folded {
  opacity: 0.4;
}

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

.page-partners .stage__num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

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

.page-partners .stage__result {
  margin-top: var(--space-3);
  max-width: var(--measure);
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-surface);
  border-left: var(--border-thick) solid var(--color-accent);
  border-radius: var(--radius-sm);
}

.page-partners .stage__result-label {
  display: block;
  margin-bottom: var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}

.page-partners .stage__result p {
  margin: 0;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink);
}

.page-partners .stage__roles {
  margin-top: var(--space-2);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.page-partners .stages-fig {
  margin: var(--space-6) 0 0;
}

.page-partners .stages-fig .figure-frame__media {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ============ 03 协作边界 ============ */
.page-partners .partners-bounds {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

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

.page-partners .bounds-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-partners .bound {
  padding: var(--space-3) 0;
  border-top: var(--border-thin) solid var(--color-contrast-line);
}

.page-partners .bound:last-child {
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}

.page-partners .bound__num {
  display: block;
  margin-bottom: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-contrast-accent);
}

.page-partners .bound__title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-contrast-ink);
}

.page-partners .bound__text {
  margin: 0;
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
}

.page-partners .bounds-fig {
  margin: 0;
  border: var(--border-thick) solid var(--color-contrast-line);
  border-radius: var(--radius-sm);
}

.page-partners .bounds-fig .figure-frame__media {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ============ 04 参与路径 ============ */
.page-partners .partners-join {
  background-color: var(--color-surface-deep);
}

.page-partners .join-list {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
}

.page-partners .join-item {
  display: grid;
  grid-template-columns: var(--space-6) minmax(0, 1fr);
  gap: var(--space-3);
  padding: var(--space-4) 0;
  border-top: var(--border-thin) solid var(--color-ink-muted);
}

.page-partners .join-item:last-child {
  border-bottom: var(--border-thin) solid var(--color-ink-muted);
}

.page-partners .join-item__index {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.page-partners .join-item__body {
  min-width: 0;
}

.page-partners .join-item__title {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-partners .join-item__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);
}

.page-partners .join-item__link {
  display: inline-block;
  padding-bottom: 2px;
  border-bottom: var(--border-thin) solid var(--color-accent);
  color: var(--color-accent);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  text-decoration: none;
}

.page-partners .join-item__link:focus-visible {
  outline: var(--border-thin) solid var(--color-focus);
  outline-offset: 2px;
}

/* ============ 桌面栅格 ============ */
@media (min-width: 700px) {
  .page-partners .partners-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-4);
  }

  .page-partners .partners-head__title {
    font-size: var(--text-3xl);
  }
}

@media (min-width: 860px) {
  .page-partners {
    --pt-node-w: 124px;
  }

  .page-partners .partners-hero__inner {
    padding-top: var(--space-6);
    padding-bottom: var(--space-8);
  }

  .page-partners .roles-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--space-6) var(--space-4);
    align-items: start;
  }

  .page-partners .roles-fig {
    grid-column: 1 / 6;
    grid-row: 1 / 3;
  }

  .page-partners .role-block:nth-of-type(1) {
    grid-column: 6 / 13;
    grid-row: 1;
  }

  .page-partners .role-block:nth-of-type(2) {
    grid-column: 6 / 13;
    grid-row: 2;
  }

  .page-partners .role-block:nth-of-type(3) {
    grid-column: 1 / 8;
    grid-row: 3;
  }

  .page-partners .role-block:nth-of-type(4) {
    grid-column: 8 / 13;
    grid-row: 3;
    margin-top: var(--space-6);
  }

  .page-partners .bounds-grid {
    grid-template-columns: 7fr 4fr;
    gap: var(--space-8);
    align-items: start;
  }

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

  .page-partners .join-item {
    grid-template-columns: var(--space-8) minmax(0, 1fr);
    gap: var(--space-4);
    padding: var(--space-6) 0;
  }
}