.page-about {
  --about-rule: rgba(200, 154, 75, .3);
  --about-warm: rgba(232, 223, 209, .58);
  background: var(--porcelain);
  color: var(--ink);
  font-family: var(--font-sans);
  padding-top: clamp(84px, 12vw, 128px);
  overflow-x: clip;
}

.page-about .about-crumb {
  padding-top: 4px;
  padding-bottom: 6px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(14px, 2.4vw, 28px);
  padding-bottom: clamp(24px, 4vw, 44px);
}

.page-about .about-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  align-items: start;
}

.page-about .about-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(34px, 6.4vw, 64px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.02em;
  margin: .3em 0 .55em;
  color: var(--ink);
}

.page-about .about-hero__lede {
  font-size: clamp(16px, 1.9vw, 19px);
  line-height: 1.85;
  color: #33302b;
  margin: 0 0 1.4em;
  max-width: 560px;
}

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

.page-about .about-hero__facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  margin: 30px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  color: var(--stone);
}

.page-about .about-hero__facts .index-num {
  font-size: 22px;
  color: var(--cinnabar);
  font-weight: 600;
}

.page-about .about-hero__media {
  margin: 0;
}

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

/* ---------- 起点 ---------- */
.page-about .about-origin__grid,
.page-about .about-team__grid,
.page-about .about-governance__grid,
.page-about .about-partners__grid {
  row-gap: 30px;
}

.page-about .about-stage {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--bronze);
  display: inline-block;
  margin: 12px 0 0;
  padding: 5px 11px;
  border: 1px solid var(--about-rule);
  background: rgba(255, 255, 255, .55);
  backdrop-filter: blur(4px);
}

.page-about .about-origin__body h2,
.page-about .about-team__main h2,
.page-about .about-governance > .wrap > h2,
.page-about .about-partners__main h2,
.page-about .about-region__text h2 {
  font-family: var(--font-serif);
  font-size: clamp(26px, 3.6vw, 42px);
  font-weight: 600;
  line-height: 1.32;
  letter-spacing: -.01em;
  margin: .35em 0 .7em;
}

.page-about .about-origin__body p,
.page-about .about-team__main p,
.page-about .about-governance p,
.page-about .about-partners__main p,
.page-about .about-region__text p {
  line-height: 1.85;
  margin: 0 0 1.1em;
  color: #2c2823;
}

.page-about .about-quote {
  margin: 2em 0 0;
  padding: 20px 24px;
  border-left: 3px solid var(--cinnabar);
  background: var(--about-warm);
  box-shadow: inset 0 0 0 1px rgba(200, 154, 75, .2);
  font-family: var(--font-serif);
  font-size: clamp(17px, 2.2vw, 21px);
  line-height: 1.75;
  color: var(--ink);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline__head {
  margin-bottom: clamp(30px, 4vw, 46px);
}

.page-about .about-timeline__head h2 {
  font-family: var(--font-serif);
  font-size: clamp(26px, 3.6vw, 42px);
  font-weight: 600;
  line-height: 1.32;
  margin: .35em 0 .6em;
}

.page-about .about-timeline__intro {
  line-height: 1.85;
  color: #2c2823;
  max-width: 62ch;
  margin: 0;
}

.page-about .about-yearnav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
}

.page-about .about-yearnav a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .05em;
  padding: 6px 13px;
  border-radius: 999px;
  border: 1px solid var(--about-rule);
  color: var(--bronze);
  background: rgba(255, 255, 255, .55);
  text-decoration: none;
  transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}

.page-about .about-yearnav a:hover,
.page-about .about-yearnav a:focus-visible {
  border-color: var(--cinnabar);
  color: var(--cinnabar);
  background: rgba(178, 58, 46, .07);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 38px 26px;
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: -6px;
  width: 1px;
  background: linear-gradient(180deg, var(--line-gold), rgba(200, 154, 75, .12));
}

.page-about .timeline__item:last-child::before {
  display: none;
}

.page-about .timeline__dot {
  position: absolute;
  left: 0;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--clay);
  box-shadow: 0 0 0 3px rgba(169, 102, 74, .16);
}

.page-about .timeline__year {
  display: block;
  margin-bottom: 6px;
  color: var(--gold);
  font-size: 20px;
  letter-spacing: .08em;
}

.page-about .timeline__body h3 {
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.6vw, 27px);
  font-weight: 600;
  line-height: 1.42;
  margin: 0 0 .5em;
  color: var(--ink);
}

.page-about .timeline__body p {
  line-height: 1.85;
  color: #2c2823;
  margin: 0 0 .8em;
  max-width: 64ch;
}

.page-about .timeline__version {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--moss);
  border: 1px solid rgba(79, 107, 87, .38);
  border-radius: 999px;
  padding: 3px 11px;
  margin-top: 2px;
}

.page-about .timeline__item:target .timeline__dot {
  background: var(--cinnabar);
  box-shadow: 0 0 0 4px rgba(178, 58, 46, .18);
}

/* ---------- 团队 ---------- */
.page-about .about-roster {
  border-top: 2px solid var(--cinnabar);
  background: var(--about-warm);
  padding: 18px 20px 8px;
}

.page-about .about-roster__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--stone);
  margin: 0 0 12px;
}

.page-about .about-roster ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-roster li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 9px 0;
  border-bottom: 1px solid rgba(200, 154, 75, .26);
}

.page-about .about-roster li:last-child {
  border-bottom: 0;
}

.page-about .about-roster__num {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--cinnabar);
  min-width: 40px;
  line-height: 1.2;
}

.page-about .about-roster__label {
  font-size: 14px;
  color: var(--ink);
  line-height: 1.5;
}

.page-about .about-team__media {
  margin: 24px 0 0;
}

/* ---------- 长期维护 ---------- */
.page-about .about-quarter {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 26px 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--bronze);
}

.page-about .about-quarter::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line-gold), transparent);
}

.page-about .about-cadence {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-cadence li {
  padding: 12px 0;
  border-bottom: 1px solid rgba(200, 154, 75, .26);
}

.page-about .about-cadence li:last-child {
  border-bottom: 0;
}

.page-about .about-cadence__when {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--cinnabar);
  margin-bottom: 4px;
}

.page-about .about-cadence__what {
  display: block;
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--ink);
}

.page-about .about-governance__more {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--stone);
  margin: 20px 0 0;
}

.page-about .about-governance__more a {
  color: var(--turquoise);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 125, 116, .4);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-about .about-governance__more a:hover,
.page-about .about-governance__more a:focus-visible {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

/* ---------- 合作 ---------- */
.page-about .about-chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .about-chip {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border: 1px solid rgba(79, 107, 87, .38);
  border-radius: 999px;
  font-size: 13.5px;
  color: var(--moss);
  background: rgba(79, 107, 87, .06);
  transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.page-about .about-chip:hover,
.page-about .about-chip:focus-visible {
  background: rgba(79, 107, 87, .13);
  border-color: var(--moss);
}

.page-about .about-chip__type {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--bronze);
  max-width: 0;
  overflow: hidden;
  white-space: nowrap;
  opacity: 0;
  margin-left: 0;
  transition: max-width .24s var(--ease), opacity .24s var(--ease), margin-left .24s var(--ease);
}

.page-about .about-chip:hover .about-chip__type,
.page-about .about-chip:focus-visible .about-chip__type {
  max-width: 220px;
  opacity: 1;
  margin-left: 10px;
}

.page-about .about-partners__media {
  margin: 0;
}

/* ---------- 服务地区 ---------- */
.page-about .about-region__panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding: clamp(24px, 4vw, 46px);
  border: 1px solid var(--about-rule);
  border-top: 3px solid var(--cinnabar);
  background: linear-gradient(180deg, rgba(232, 223, 209, .82), rgba(247, 242, 232, .94));
}

.page-about .about-region__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-region__link {
  font-size: 14px;
  color: var(--turquoise);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 125, 116, .4);
  padding-bottom: 2px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-region__link:hover,
.page-about .about-region__link:focus-visible {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

.page-about .about-region__stats {
  margin: 0;
}

.page-about .about-region__stats > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(200, 154, 75, .3);
}

.page-about .about-region__stats > div:first-child {
  border-top: 1px solid rgba(200, 154, 75, .3);
}

.page-about .about-region__stats dt {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--stone);
}

.page-about .about-region__stats dd {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  text-align: right;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-about .about-region__panel {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr);
    align-items: start;
    gap: clamp(28px, 4vw, 56px);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: clamp(36px, 5vw, 72px);
    align-items: end;
  }

  .page-about .about-origin__rail {
    position: sticky;
    top: 118px;
    align-self: start;
  }

  .page-about .timeline__item {
    display: grid;
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 36px;
    padding: 0 0 52px 0;
  }

  .page-about .timeline__item::before {
    left: 124px;
    top: 12px;
    bottom: -12px;
  }

  .page-about .timeline__dot {
    left: 119px;
    top: 13px;
  }

  .page-about .timeline__year {
    text-align: right;
    padding-right: 6px;
    margin-bottom: 0;
    font-size: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-yearnav a,
  .page-about .about-chip,
  .page-about .about-chip__type,
  .page-about .about-region__link,
  .page-about .about-governance__more a {
    transition: none;
  }
}