.page-about {
  --about-rail: 208px;
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-crumb {
  padding-top: 16px;
}

.page-about .about-hero {
  padding-block: 48px 64px;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 32px;
}

.page-about .about-hero-copy {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about .about-hero-copy .lead {
  max-width: 60ch;
  color: var(--paper);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .media-frame {
  overflow: hidden;
  border: 2px solid var(--rule);
  background: var(--ink-2);
}

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

.page-about .about-hero-media {
  aspect-ratio: 16 / 10;
}

.page-about .media-caption {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  padding: 10px 2px 0;
}

.page-about .about-stats {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 2px solid var(--rule);
}

.page-about .about-stat {
  display: grid;
  gap: 6px;
  padding-block: 18px;
  border-bottom: 2px solid var(--rule-soft);
}

.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1.1;
  color: var(--lime);
  letter-spacing: -0.02em;
}

.page-about .about-stat-label {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 42ch;
}

.page-about .about-layout {
  padding-bottom: 96px;
}

.page-about .about-index {
  padding: 4px 0 20px;
  overflow-x: auto;
}

.page-about .about-index-title {
  display: none;
}

.page-about .about-index-list {
  display: flex;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-index-link {
  display: block;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--rule);
  padding: 7px 12px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-index-link.is-active,
.page-about .about-index-link[aria-current] {
  color: var(--lime);
  border-color: var(--lime);
}

.page-about .about-stream {
  display: grid;
}

.page-about .about-section {
  padding-block: 64px;
  border-top: 2px solid var(--rule-soft);
}

.page-about .about-section-head {
  display: grid;
  gap: 14px;
  margin-bottom: 36px;
}

.page-about .about-section-head .index-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-about .about-section-lead {
  max-width: 62ch;
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.page-about .about-inline-link {
  margin: 28px 0 0;
  font-size: 14px;
  color: var(--muted);
}

.page-about .about-text-link {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 247, 81, 0.45);
}

/* 四条内容线 */
.page-about .about-lines {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-line {
  display: grid;
  gap: 16px;
  padding-block: 28px;
  border-top: 2px solid var(--rule);
}

.page-about .about-line:last-child {
  border-bottom: 2px solid var(--rule);
}

.page-about .about-line-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-line-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
  border: 1px solid var(--rule);
  padding: 2px 7px;
}

.page-about .about-line-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .about-line-text {
  display: grid;
  gap: 12px;
}

.page-about .about-line-body {
  margin: 0;
  max-width: 64ch;
  line-height: 1.75;
}

.page-about .about-line-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* 团队 */
.page-about .about-team-grid {
  display: grid;
  gap: 36px;
}

.page-about .about-team-copy {
  display: grid;
  gap: 32px;
  align-content: start;
}

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-role {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 18px;
  padding-block: 22px;
  border-top: 2px solid var(--rule);
}

.page-about .about-role:last-child {
  border-bottom: 2px solid var(--rule);
}

.page-about .about-role-num {
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-role-name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
}

.page-about .about-role-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
  max-width: 58ch;
}

.page-about .about-cadence {
  border: 2px solid var(--rule);
  background: rgba(7, 13, 21, 0.55);
  padding: 22px 20px;
  box-shadow: var(--shadow-sm);
}

.page-about .about-cadence-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--lime);
  letter-spacing: 0.01em;
}

.page-about .about-cadence p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-team-media {
  aspect-ratio: 1280 / 820;
  align-self: start;
}

/* 版本时间轴 */
.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 2px solid var(--rule);
}

.page-about .about-tl-item {
  position: relative;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 30px;
  width: 12px;
  height: 12px;
  background: var(--lime);
  border: 2px solid var(--indigo);
}

.page-about .about-tl-trigger {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 14px;
  width: 100%;
  background: transparent;
  border: 0;
  border-top: 2px solid var(--rule);
  padding: 20px 0 16px;
  color: var(--paper);
  text-align: left;
  font: inherit;
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}

.page-about .about-tl-item:first-child .about-tl-trigger {
  border-top: 0;
}

.page-about .about-tl-year {
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--lime);
  min-width: 84px;
  letter-spacing: -0.02em;
}

.page-about .about-tl-title {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
}

.page-about .about-tl-trigger .expand-icon {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--muted);
}

.page-about .expand-group[data-open="true"] > .about-tl-trigger .expand-icon {
  color: var(--lime);
}

.page-about .about-tl .expand-body {
  padding: 0 0 22px;
  max-width: 66ch;
  color: var(--paper);
  line-height: 1.8;
}

.page-about .about-tl .expand-body p {
  margin: 0;
}

/* 归档流程 */
.page-about .about-workflow-grid {
  display: grid;
  gap: 36px;
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-flow-step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding-block: 22px;
  border-top: 2px solid var(--rule);
}

.page-about .about-flow-num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--orange);
  padding-top: 4px;
}

.page-about .about-flow-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
}

.page-about .about-flow-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  max-width: 58ch;
}

.page-about .about-workflow-aside {
  display: grid;
  gap: 28px;
  align-content: start;
}

.page-about .about-flow-media {
  aspect-ratio: 1100 / 760;
}

.page-about .about-fix {
  border-left: 4px solid var(--lime);
  background: rgba(7, 13, 21, 0.5);
  padding: 18px 20px;
}

.page-about .about-fix-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--lime);
}

.page-about .about-fix p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
}

/* 服务地区 */
.page-about .about-region-grid {
  display: grid;
  gap: 32px;
}

.page-about .about-region-copy {
  display: grid;
  gap: 16px;
  max-width: 62ch;
}

.page-about .about-region-copy p {
  margin: 0;
  line-height: 1.8;
}

.page-about .about-region-figures {
  display: grid;
  gap: 0;
  border-top: 2px solid var(--rule);
  align-content: start;
}

.page-about .about-figure {
  display: grid;
  gap: 6px;
  padding-block: 18px;
  border-bottom: 2px solid var(--rule-soft);
}

.page-about .about-figure-num {
  font-family: var(--font-mono);
  font-size: 28px;
  color: var(--lime);
  line-height: 1.1;
}

.page-about .about-figure-label {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* 合作与评价 */
.page-about .about-partners-grid {
  display: grid;
  gap: 0;
}

.page-about .about-partner-block {
  padding-block: 26px;
  border-top: 2px solid var(--rule);
}

.page-about .about-partner-block:last-child {
  border-bottom: 2px solid var(--rule);
}

.page-about .about-partner-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  color: var(--lime);
  line-height: 1.1;
  margin-bottom: 10px;
}

.page-about .about-partner-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
}

.page-about .about-partner-block p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  max-width: 60ch;
}

/* 收口 */
.page-about .about-cta {
  border: 2px solid var(--rule);
  background: var(--ink-2);
  padding: 36px 22px;
  box-shadow: var(--shadow-sm);
}

.page-about .about-cta-text {
  margin: 14px 0 0;
  max-width: 56ch;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

@media (min-width: 640px) {
  .page-about .about-hero {
    padding-block: 64px 80px;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-stat {
    padding: 22px 24px 22px 0;
    border-bottom: 0;
    border-right: 2px solid var(--rule-soft);
  }

  .page-about .about-stat:nth-child(2n) {
    padding-left: 24px;
    border-right: 0;
  }

  .page-about .about-stat:nth-child(n + 3) {
    border-top: 2px solid var(--rule-soft);
  }

  .page-about .about-fix {
    padding: 24px 28px;
  }

  .page-about .about-cta {
    padding: 48px 40px;
    box-shadow: var(--shadow);
  }
}

@media (min-width: 900px) {
  .page-about .about-line {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    column-gap: 48px;
    row-gap: 0;
    align-items: start;
  }

  .page-about .about-line-body {
    max-width: 58ch;
  }

  .page-about .about-region-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: 56px;
  }

  .page-about .about-partners-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 48px;
  }

  .page-about .about-partner-block--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: 56px;
    align-items: end;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 56px;
  }

  .page-about .about-stat {
    border-top: 0;
    border-right: 2px solid var(--rule-soft);
    padding: 24px 24px 4px 0;
  }

  .page-about .about-stat:nth-child(2n) {
    padding-left: 0;
    border-right: 2px solid var(--rule-soft);
  }

  .page-about .about-stat:nth-child(n + 3) {
    border-top: 0;
  }

  .page-about .about-stat:not(:first-child) {
    padding-left: 24px;
  }

  .page-about .about-stat:last-child {
    border-right: 0;
  }

  .page-about .about-layout {
    display: grid;
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    column-gap: 64px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
    overflow-x: visible;
    padding: 8px 0 0 18px;
    border-left: 2px solid var(--rule);
  }

  .page-about .about-index-title {
    display: block;
    margin: 0 0 14px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: 0.18em;
    color: var(--muted);
  }

  .page-about .about-index-list {
    display: grid;
    gap: 2px;
  }

  .page-about .about-index-link {
    border: 0;
    border-bottom: 1px solid var(--rule-soft);
    padding: 9px 0;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: 56px;
  }

  .page-about .about-workflow-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    column-gap: 56px;
  }

  .page-about .about-section {
    padding-block: 80px;
  }

  .page-about .about-section--timeline .about-tl {
    padding-left: 34px;
  }

  .page-about .about-tl-item::before {
    left: -41px;
  }
}
</style>

.page-about {
  --about-rail: 208px;
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-crumb {
  padding-top: 16px;
}

.page-about .about-hero {
  padding-block: 48px 64px;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 32px;
}

.page-about .about-hero-copy {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about .about-hero-copy .lead {
  max-width: 58ch;
  color: var(--paper);
  line-height: 1.8;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .media-frame {
  overflow: hidden;
  border: 2px solid var(--rule);
  background: var(--ink-2);
}

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

.page-about .about-hero-media {
  aspect-ratio: 16 / 10;
}

.page-about .media-caption {
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
  padding: 10px 0 0;
}

.page-about .about-stats {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 2px solid var(--rule);
}

.page-about .about-stat {
  display: grid;
  gap: 8px;
  padding-block: 18px;
  border-bottom: 2px solid var(--rule-soft);
}

.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1.1;
  color: var(--lime);
  letter-spacing: -0.02em;
}

.page-about .about-stat-label {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 42ch;
}

.page-about .about-layout {
  padding-bottom: 96px;
}

.page-about .about-index {
  padding: 8px 0 20px;
  overflow-x: auto;
}

.page-about .about-index-title {
  display: none;
}

.page-about .about-index-list {
  display: flex;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-index-link {
  display: block;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  border: 1px solid var(--rule);
  padding: 7px 12px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-index-link:hover,
.page-about .about-index-link:focus-visible {
  color: var(--lime);
  border-color: var(--lime-deep);
}

.page-about .about-index-link.is-active,
.page-about .about-index-link[aria-current="true"] {
  color: var(--lime);
  border-color: var(--lime);
}

.page-about .about-stream {
  display: grid;
}

.page-about .about-section {
  padding-block: 64px;
  border-top: 2px solid var(--rule-soft);
}

.page-about .about-section-head {
  display: grid;
  gap: 14px;
  margin-bottom: 36px;
}

.page-about .about-section-head .index-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-about .about-section-lead {
  margin: 0;
  max-width: 60ch;
  color: var(--muted);
  line-height: 1.75;
}

.page-about .about-inline-link {
  margin: 28px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-text-link {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 247, 81, 0.45);
}

/* 四条内容线 */
.page-about .about-lines {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-line {
  display: grid;
  gap: 16px;
  padding-block: 28px;
  border-top: 2px solid var(--rule);
}

.page-about .about-line:last-child {
  border-bottom: 2px solid var(--rule);
}

.page-about .about-line-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-line-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
  border: 1px solid var(--rule);
  padding: 2px 7px;
}

.page-about .about-line-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .about-line-text {
  display: grid;
  gap: 12px;
}

.page-about .about-line-body {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-line-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* 团队 */
.page-about .about-team-grid {
  display: grid;
  gap: 36px;
}

.page-about .about-team-copy {
  display: grid;
  gap: 32px;
  align-content: start;
}

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-role {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 16px;
  padding-block: 22px;
  border-top: 2px solid var(--rule);
}

.page-about .about-role:last-child {
  border-bottom: 2px solid var(--rule);
}

.page-about .about-role-num {
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1.1;
  color: var(--lime);
}

.page-about .about-role-name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
}

.page-about .about-role-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  max-width: 56ch;
}

.page-about .about-cadence {
  border: 2px solid var(--rule);
  background: rgba(7, 13, 21, 0.55);
  padding: 22px 20px;
  box-shadow: var(--shadow-sm);
}

.page-about .about-cadence-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--lime);
}

.page-about .about-cadence p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-team-media {
  aspect-ratio: 1280 / 820;
  align-self: start;
}

/* 版本时间轴 */
.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 2px solid var(--rule);
}

.page-about .about-tl-item {
  position: relative;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 30px;
  width: 12px;
  height: 12px;
  background: var(--lime);
  border: 2px solid var(--indigo);
}

.page-about .about-tl-trigger {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 14px;
  width: 100%;
  background: transparent;
  border: 0;
  border-top: 2px solid var(--rule);
  padding: 20px 0 16px;
  color: var(--paper);
  text-align: left;
  font: inherit;
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}

.page-about .about-tl-item:first-child .about-tl-trigger {
  border-top: 0;
}

.page-about .about-tl-trigger:hover {
  color: var(--lime);
}

.page-about .about-tl-year {
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--lime);
  min-width: 84px;
  letter-spacing: -0.02em;
}

.page-about .about-tl-title {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
}

.page-about .about-tl-trigger .expand-icon {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--muted);
}

.page-about .expand-group[data-open="true"] > .about-tl-trigger .expand-icon {
  color: var(--lime);
}

.page-about .about-tl .expand-body {
  padding: 0 0 22px;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-tl .expand-body p {
  margin: 0;
}

/* 归档流程 */
.page-about .about-workflow-grid {
  display: grid;
  gap: 36px;
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-flow-step {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding-block: 22px;
  border-top: 2px solid var(--rule);
}

.page-about .about-flow-num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--orange);
  padding-top: 4px;
}

.page-about .about-flow-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
}

.page-about .about-flow-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  max-width: 56ch;
}

.page-about .about-workflow-aside {
  display: grid;
  gap: 28px;
  align-content: start;
}

.page-about .about-flow-media {
  aspect-ratio: 1100 / 760;
}

.page-about .about-fix {
  border-left: 4px solid var(--lime);
  background: rgba(7, 13, 21, 0.5);
  padding: 18px 20px;
}

.page-about .about-fix-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--lime);
}

.page-about .about-fix p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

/* 服务地区 */
.page-about .about-region-grid {
  display: grid;
  gap: 32px;
}

.page-about .about-region-copy {
  display: grid;
  gap: 16px;
  max-width: 60ch;
}

.page-about .about-region-copy p {
  margin: 0;
  line-height: 1.8;
}

.page-about .about-region-figures {
  display: grid;
  align-content: start;
  border-top: 2px solid var(--rule);
}

.page-about .about-figure {
  display: grid;
  gap: 6px;
  padding-block: 18px;
  border-bottom: 2px solid var(--rule-soft);
}

.page-about .about-figure-num {
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1.1;
  color: var(--lime);
}

.page-about .about-figure-label {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* 合作与评价 */
.page-about .about-partners-grid {
  display: grid;
  gap: 0;
}

.page-about .about-partner-block {
  padding-block: 26px;
  border-top: 2px solid var(--rule);
}

.page-about .about-partner-block:last-child {
  border-bottom: 2px solid var(--rule);
}

.page-about .about-partner-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1.1;
  color: var(--lime);
  margin-bottom: 10px;
}

.page-about .about-partner-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
}

.page-about .about-partner-block p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  max-width: 58ch;
}

/* 收口 */
.page-about .about-cta {
  border: 2px solid var(--rule);
  background: var(--ink-2);
  padding: 36px 22px;
  box-shadow: var(--shadow-sm);
}

.page-about .about-cta-text {
  margin: 14px 0 0;
  max-width: 54ch;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

@media (min-width: 640px) {
  .page-about .about-hero {
    padding-block: 64px 80px;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-stat {
    padding: 22px 24px 22px 0;
    border-bottom: 0;
    border-right: 2px solid var(--rule-soft);
  }

  .page-about .about-stat:nth-child(2n) {
    padding-left: 24px;
    border-right: 0;
  }

  .page-about .about-stat:nth-child(n + 3) {
    border-top: 2px solid var(--rule-soft);
  }

  .page-about .about-fix {
    padding: 24px 28px;
  }

  .page-about .about-cta {
    padding: 48px 40px;
    box-shadow: var(--shadow);
  }
}

@media (min-width: 900px) {
  .page-about .about-line {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    column-gap: 48px;
    row-gap: 0;
    align-items: start;
  }

  .page-about .about-region-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: 56px;
  }

  .page-about .about-partners-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 48px;
  }

  .page-about .about-partner-block--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: 56px;
    align-items: end;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 56px;
  }

  .page-about .about-stat {
    padding: 24px 24px 4px 0;
    border-top: 0;
    border-right: 2px solid var(--rule-soft);
  }

  .page-about .about-stat:nth-child(2n) {
    padding-left: 0;
    border-right: 2px solid var(--rule-soft);
  }

  .page-about .about-stat:nth-child(n + 3) {
    border-top: 0;
  }

  .page-about .about-stat:not(:first-child) {
    padding-left: 24px;
  }

  .page-about .about-stat:last-child {
    border-right: 0;
  }

  .page-about .about-layout {
    display: grid;
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    column-gap: 64px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
    overflow-x: visible;
    padding: 8px 0 0 18px;
    border-left: 2px solid var(--rule);
  }

  .page-about .about-index-title {
    display: block;
    margin: 0 0 14px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: 0.18em;
    color: var(--muted);
  }

  .page-about .about-index-list {
    display: grid;
    gap: 2px;
  }

  .page-about .about-index-link {
    border: 0;
    border-bottom: 1px solid var(--rule-soft);
    padding: 9px 0;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: 56px;
  }

  .page-about .about-workflow-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    column-gap: 56px;
  }

  .page-about .about-section {
    padding-block: 80px;
  }

  .page-about .about-section--timeline .about-tl {
    padding-left: 34px;
  }

  .page-about .about-tl-item::before {
    left: -41px;
  }
}

.page-about {
  --about-rail: 208px;
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-crumb {
  padding-top: 16px;
}

.page-about .about-hero {
  padding-block: 48px 64px;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 32px;
}

.page-about .about-hero-copy {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about .about-hero-copy .lead {
  max-width: 58ch;
  color: var(--paper);
  line-height: 1.8;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .media-frame {
  overflow: hidden;
  border: 2px solid var(--rule);
  background: var(--ink-2);
}

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

.page-about .about-hero-media {
  aspect-ratio: 16 / 10;
}

.page-about .media-caption {
  padding: 10px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-stats {
  list-style: none;
  margin: 40px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 2px solid var(--rule);
}

.page-about .about-stat {
  display: grid;
  gap: 8px;
  padding-block: 18px;
  border-bottom: 2px solid var(--rule-soft);
}

.page-about .about-stat-num {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1.1;
  color: var(--lime);
  letter-spacing: -0.02em;
}

.page-about .about-stat-label {
  max-width: 42ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-layout {
  padding-bottom: 96px;
}

.page-about .about-index {
  padding: 8px 0 20px;
  overflow-x: auto;
}

.page-about .about-index-title {
  display: none;
}

.page-about .about-index-list {
  display: flex;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-index-link {
  display: block;
  padding: 7px 12px;
  border: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-index-link:hover,
.page-about .about-index-link:focus-visible {
  color: var(--lime);
  border-color: var(--lime-deep);
}

.page-about .about-index-link.is-active,
.page-about .about-index-link[aria-current="true"] {
  color: var(--lime);
  border-color: var(--lime);
}

.page-about .about-stream {
  display: grid;
}

.page-about .about-section {
  padding-block: 64px;
  border-top: 2px solid var(--rule-soft);
}

.page-about .about-section-head {
  display: grid;
  gap: 14px;
  margin-bottom: 36px;
}

.page-about .about-section-head .index-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-about .about-section-lead {
  max-width: 60ch;
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.page-about .about-inline-link {
  margin: 28px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-text-link {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 247, 81, 0.45);
}

/* 四条内容线 */
.page-about .about-lines {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-line {
  display: grid;
  gap: 16px;
  padding-block: 28px;
  border-top: 2px solid var(--rule);
}

.page-about .about-line:last-child {
  border-bottom: 2px solid var(--rule);
}

.page-about .about-line-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-line-num {
  padding: 2px 7px;
  border: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
}

.page-about .about-line-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-about .about-line-text {
  display: grid;
  gap: 12px;
}

.page-about .about-line-body {
  max-width: 62ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-line-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* 团队 */
.page-about .about-team-grid {
  display: grid;
  gap: 36px;
}

.page-about .about-team-copy {
  display: grid;
  gap: 32px;
  align-content: start;
}

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-role {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 16px;
  padding-block: 22px;
  border-top: 2px solid var(--rule);
}

.page-about .about-role:last-child {
  border-bottom: 2px solid var(--rule);
}

.page-about .about-role-num {
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1.1;
  color: var(--lime);
}

.page-about .about-role-name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
}

.page-about .about-role-desc {
  max-width: 56ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-cadence {
  padding: 22px 20px;
  border: 2px solid var(--rule);
  background: rgba(7, 13, 21, 0.55);
  box-shadow: var(--shadow-sm);
}

.page-about .about-cadence-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--lime);
}

.page-about .about-cadence p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-team-media {
  aspect-ratio: 1280 / 820;
  align-self: start;
}

/* 版本时间轴 */
.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  border-left: 2px solid var(--rule);
}

.page-about .about-tl-item {
  position: relative;
}

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 30px;
  width: 12px;
  height: 12px;
  background: var(--lime);
  border: 2px solid var(--indigo);
}

.page-about .about-tl-trigger {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 14px;
  width: 100%;
  padding: 20px 0 16px;
  border: 0;
  border-top: 2px solid var(--rule);
  background: transparent;
  color: var(--paper);
  text-align: left;
  font: inherit;
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}

.page-about .about-tl-item:first-child .about-tl-trigger {
  border-top: 0;
}

.page-about .about-tl-trigger:hover {
  color: var(--lime);
}

.page-about .about-tl-year {
  min-width: 84px;
  font-family: var(--font-mono);
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--lime);
}

.page-about .about-tl-title {
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
}

.page-about .about-tl-trigger .expand-icon {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--muted);
}

.page-about .expand-group[data-open="true"] > .about-tl-trigger .expand-icon {
  color: var(--lime);
}

.page-about .about-tl .expand-body {
  max-width: 64ch;
  padding: 0 0 22px;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-tl .expand-body p {
  margin: 0;
}

/* 归档流程 */
.page-about .about-workflow-grid {
  display: grid;
  gap: 36px;
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-flow-step {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding-block: 22px;
  border-top: 2px solid var(--rule);
}

.page-about .about-flow-num {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--orange);
}

.page-about .about-flow-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
}

.page-about .about-flow-text {
  max-width: 56ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

.page-about .about-workflow-aside {
  display: grid;
  gap: 28px;
  align-content: start;
}

.page-about .about-flow-media {
  aspect-ratio: 1100 / 760;
}

.page-about .about-fix {
  padding: 18px 20px;
  border-left: 4px solid var(--lime);
  background: rgba(7, 13, 21, 0.5);
}

.page-about .about-fix-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--lime);
}

.page-about .about-fix p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

/* 服务地区 */
.page-about .about-region-grid {
  display: grid;
  gap: 32px;
}

.page-about .about-region-copy {
  display: grid;
  gap: 16px;
  max-width: 60ch;
}

.page-about .about-region-copy p {
  margin: 0;
  line-height: 1.8;
}

.page-about .about-region-figures {
  display: grid;
  align-content: start;
  border-top: 2px solid var(--rule);
}

.page-about .about-figure {
  display: grid;
  gap: 6px;
  padding-block: 18px;
  border-bottom: 2px solid var(--rule-soft);
}

.page-about .about-figure-num {
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1.1;
  color: var(--lime);
}

.page-about .about-figure-label {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* 合作与评价 */
.page-about .about-partners-grid {
  display: grid;
  gap: 0;
}

.page-about .about-partner-block {
  padding-block: 26px;
  border-top: 2px solid var(--rule);
}

.page-about .about-partner-block:last-child {
  border-bottom: 2px solid var(--rule);
}

.page-about .about-partner-num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1.1;
  color: var(--lime);
}

.page-about .about-partner-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 700;
}

.page-about .about-partner-block p {
  max-width: 58ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
}

/* 收口 */
.page-about .about-cta {
  padding: 36px 22px;
  border: 2px solid var(--rule);
  background: var(--ink-2);
  box-shadow: var(--shadow-sm);
}

.page-about .about-cta-text {
  max-width: 54ch;
  margin: 14px 0 0;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

@media (min-width: 640px) {
  .page-about .about-hero {
    padding-block: 64px 80px;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-stat {
    padding: 22px 24px 22px 0;
    border-bottom: 0;
    border-right: 2px solid var(--rule-soft);
  }

  .page-about .about-stat:nth-child(2n) {
    padding-left: 24px;
    border-right: 0;
  }

  .page-about .about-stat:nth-child(n + 3) {
    border-top: 2px solid var(--rule-soft);
  }

  .page-about .about-fix {
    padding: 24px 28px;
  }

  .page-about .about-cta {
    padding: 48px 40px;
    box-shadow: var(--shadow);
  }
}

@media (min-width: 900px) {
  .page-about .about-line {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    column-gap: 48px;
    row-gap: 0;
    align-items: start;
  }

  .page-about .about-region-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: 56px;
  }

  .page-about .about-partners-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 48px;
  }

  .page-about .about-partner-block--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: 56px;
    align-items: end;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 56px;
  }

  .page-about .about-stat {
    padding: 24px 24px 4px 0;
    border-top: 0;
    border-right: 2px solid var(--rule-soft);
  }

  .page-about .about-stat:nth-child(2n) {
    padding-left: 0;
    border-right: 2px solid var(--rule-soft);
  }

  .page-about .about-stat:nth-child(n + 3) {
    border-top: 0;
  }

  .page-about .about-stat:not(:first-child) {
    padding-left: 24px;
  }

  .page-about .about-stat:last-child {
    border-right: 0;
  }

  .page-about .about-layout {
    display: grid;
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    column-gap: 64px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
    padding: 8px 0 0 18px;
    border-left: 2px solid var(--rule);
    overflow-x: visible;
  }

  .page-about .about-index-title {
    display: block;
    margin: 0 0 14px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: 0.18em;
    color: var(--muted);
  }

  .page-about .about-index-list {
    display: grid;
    gap: 2px;
  }

  .page-about .about-index-link {
    padding: 9px 0;
    border: 0;
    border-bottom: 1px solid var(--rule-soft);
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: 56px;
  }

  .page-about .about-workflow-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    column-gap: 56px;
  }

  .page-about .about-section {
    padding-block: 80px;
  }

  .page-about .about-section--timeline .about-tl {
    padding-left: 34px;
  }

  .page-about .about-tl-item::before {
    left: -41px;
  }
}