.page-about {
  --about-sticky: 96px;
  --about-rule: rgba(138, 90, 43, 0.28);
  display: block;
  background: var(--moon);
  color: var(--ink);
  overflow-x: clip;
}

.page-about .about-crumb-row {
  padding-block: 18px 8px;
}

.page-about .about-hero {
  position: relative;
  padding-block: clamp(18px, 3vw, 34px) clamp(48px, 7vw, 92px);
  background:
    linear-gradient(118deg, transparent 0 62%, rgba(31, 78, 121, 0.08) 62% 100%),
    var(--moon);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: var(--about-rule);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-hero__side {
  border-left: 2px solid var(--copper);
  padding-left: 14px;
}

.page-about .about-side-label {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--copper);
}

.page-about .about-jump__title {
  margin: 0 0 10px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  color: var(--slate);
}

.page-about .about-jump__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 7px;
}

.page-about .about-jump__link {
  display: flex;
  gap: 8px;
  align-items: baseline;
  color: var(--cobalt);
  font-size: 13px;
  line-height: 1.5;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}

.page-about .about-jump__link:hover,
.page-about .about-jump__link:focus-visible {
  color: var(--ochre);
  border-bottom-color: var(--copper);
}

.page-about .about-jump__link .num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--copper);
}

.page-about .about-hero__title {
  margin: 0;
  max-width: 16em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 7.2vw, 78px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ochre);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: clamp(18px, 2.4vw, 28px) 0 0;
  max-width: 38em;
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 14px;
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: 18px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-fact {
  display: grid;
  gap: 6px;
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1;
  color: var(--cobalt);
  letter-spacing: 0.02em;
}

.page-about .about-fact__label {
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--slate);
}

.page-about .about-section {
  padding-block: clamp(46px, 7vw, 88px);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-section--cool {
  background: var(--mist);
}

.page-about .about-section--paper {
  background: var(--paper);
}

.page-about .about-section--cooperate {
  background:
    linear-gradient(180deg, rgba(217, 164, 65, 0.1), transparent 52%),
    var(--moon);
}

.page-about .about-section__head {
  max-width: 760px;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-section__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--copper);
}

.page-about .about-section__kicker .num {
  display: inline-grid;
  place-items: center;
  min-width: 28px;
  min-height: 28px;
  padding: 0 6px;
  border: 1px solid var(--copper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--copper);
  background: var(--paper);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(27px, 4vw, 44px);
  line-height: 1.22;
  letter-spacing: -0.005em;
  color: var(--ink);
  text-wrap: balance;
}

.page-about .about-lead {
  margin: 16px 0 0;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .about-split__text p {
  margin: 0 0 16px;
  max-width: 40em;
  line-height: 1.85;
}

.page-about .about-split__text p:last-child {
  margin-bottom: 0;
}

.page-about .about-figure {
  margin: 0;
  background: var(--paper);
  border: 1px solid var(--about-rule);
  padding: 10px 10px 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
  background: var(--mist);
}

.page-about .about-figure--method img {
  aspect-ratio: 9 / 7;
}

.page-about .about-figure__caption {
  padding: 10px 2px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .about-quote {
  margin: 24px 0 0;
  padding: 18px 20px;
  border-left: 4px solid var(--copper);
  background: var(--paper);
  font-family: var(--font-display);
  font-size: clamp(17px, 1.9vw, 21px);
  line-height: 1.65;
  color: var(--maroon);
}

.page-about .about-quote--warm {
  border-left-color: var(--gold);
  background: rgba(251, 248, 241, 0.7);
}

.page-about .about-method-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-layers {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-cool);
}

.page-about .about-layer {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding-block: 20px;
  border-bottom: 1px solid var(--line-cool);
}

.page-about .about-layer__num {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--copper);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--copper);
  background: var(--paper);
}

.page-about .about-layer__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.4;
  color: var(--cobalt);
}

.page-about .about-layer__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

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

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding-block: 26px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-timeline__item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-timeline__phase {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  border-left: 2px solid var(--copper);
  padding-left: 12px;
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--ochre);
}

.page-about .about-timeline__stage {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.page-about .about-timeline__content {
  padding-left: 14px;
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.2vw, 24px);
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-timeline__image {
  margin-top: 18px;
  max-width: 560px;
}

.page-about .about-timeline__image img {
  aspect-ratio: 4 / 3;
}

.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

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

.page-about .about-team__details {
  border: 1px solid var(--about-rule);
  background: var(--moon);
  padding: 0 16px;
}

.page-about .about-team__details[open] {
  border-color: var(--copper);
}

.page-about .about-team__summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-block: 14px;
  font-family: var(--font-display);
  font-size: 16.5px;
  line-height: 1.55;
  color: var(--ink);
}

.page-about .about-team__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-team__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--copper);
}

.page-about .about-team__details[open] .about-team__summary::after {
  content: "−";
}

.page-about .about-team__detail {
  margin: 0;
  padding: 0 0 16px;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-team__note {
  border: 1px solid var(--copper);
  background: var(--paper);
  padding: clamp(18px, 3vw, 26px);
}

.page-about .about-team__note-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.4;
  color: var(--maroon);
}

.page-about .about-team__steps {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-team__steps li {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-team__steps .num {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border: 1px solid var(--copper);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--copper);
}

.page-about .about-inline-link {
  color: var(--cobalt);
  text-decoration: underline;
  text-decoration-color: var(--copper);
  text-underline-offset: 3px;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--ochre);
}

.page-about .about-yunnan {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-yunnan__text p {
  margin: 0 0 16px;
  max-width: 40em;
  line-height: 1.85;
}

.page-about .about-material-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-material {
  display: grid;
  gap: 6px;
  padding-block: 16px;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-material__name {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--ochre);
}

.page-about .about-material__desc {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-actions {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-action {
  display: grid;
  gap: 8px;
  padding: 20px;
  background: var(--paper);
  border: 1px solid var(--about-rule);
  color: var(--ink);
  text-decoration: none;
  transition: border-color var(--ease), transform var(--ease), background-color var(--ease);
}

.page-about .about-action:hover,
.page-about .about-action:focus-visible {
  border-color: var(--ochre);
  background: var(--moon);
  transform: translateY(-2px);
}

.page-about .about-action__title {
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.4;
  color: var(--cobalt);
}

.page-about .about-action__text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-action__link {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ochre);
}

.page-about .about-cooperate-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: clamp(26px, 3vw, 36px);
  padding-top: 20px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-cooperate-foot p {
  margin: 0;
  max-width: 46em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink);
}

@media (min-width: 720px) {
  .page-about .about-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .about-method-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .about-timeline__item {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 28px;
  }

  .page-about .about-timeline__phase {
    position: sticky;
    top: var(--about-sticky);
    align-self: start;
    display: grid;
    gap: 6px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  }

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

  .page-about .about-yunnan {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

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

.page-about {
  --about-sticky: 96px;
  --about-rule: rgba(138, 90, 43, 0.28);
  display: block;
  background: var(--moon);
  color: var(--ink);
  overflow-x: clip;
}

.page-about .about-crumb-row {
  padding-block: 18px 8px;
}

.page-about .about-hero {
  position: relative;
  padding-block: clamp(18px, 3vw, 34px) clamp(48px, 7vw, 92px);
  background:
    linear-gradient(118deg, transparent 0 62%, rgba(31, 78, 121, 0.08) 62% 100%),
    var(--moon);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: var(--about-rule);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-hero__side {
  border-left: 2px solid var(--copper);
  padding-left: 14px;
}

.page-about .about-side-label {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--copper);
}

.page-about .about-jump__title {
  margin: 0 0 10px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  color: var(--slate);
}

.page-about .about-jump__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 7px;
}

.page-about .about-jump__link {
  display: flex;
  gap: 8px;
  align-items: baseline;
  color: var(--cobalt);
  font-size: 13px;
  line-height: 1.5;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}

.page-about .about-jump__link:hover,
.page-about .about-jump__link:focus-visible {
  color: var(--ochre);
  border-bottom-color: var(--copper);
}

.page-about .about-jump__link .num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--copper);
}

.page-about .about-hero__title {
  margin: 0;
  max-width: 16em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 7.2vw, 78px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ochre);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: clamp(18px, 2.4vw, 28px) 0 0;
  max-width: 38em;
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 14px;
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: 18px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-fact {
  display: grid;
  gap: 6px;
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1;
  color: var(--cobalt);
  letter-spacing: 0.02em;
}

.page-about .about-fact__label {
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--slate);
}

.page-about .about-section {
  padding-block: clamp(46px, 7vw, 88px);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-section--cool {
  background: var(--mist);
}

.page-about .about-section--paper {
  background: var(--paper);
}

.page-about .about-section--cooperate {
  background:
    linear-gradient(180deg, rgba(217, 164, 65, 0.1), transparent 52%),
    var(--moon);
}

.page-about .about-section__head {
  max-width: 760px;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-section__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--copper);
}

.page-about .about-section__kicker .num {
  display: inline-grid;
  place-items: center;
  min-width: 28px;
  min-height: 28px;
  padding: 0 6px;
  border: 1px solid var(--copper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--copper);
  background: var(--paper);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(27px, 4vw, 44px);
  line-height: 1.22;
  letter-spacing: -0.005em;
  color: var(--ink);
  text-wrap: balance;
}

.page-about .about-lead {
  margin: 16px 0 0;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .about-split__text p {
  margin: 0 0 16px;
  max-width: 40em;
  line-height: 1.85;
}

.page-about .about-split__text p:last-child {
  margin-bottom: 0;
}

.page-about .about-figure {
  margin: 0;
  background: var(--paper);
  border: 1px solid var(--about-rule);
  padding: 10px 10px 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
  background: var(--mist);
}

.page-about .about-figure--method img {
  aspect-ratio: 9 / 7;
}

.page-about .about-figure__caption {
  padding: 10px 2px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .about-quote {
  margin: 24px 0 0;
  padding: 18px 20px;
  border-left: 4px solid var(--copper);
  background: var(--paper);
  font-family: var(--font-display);
  font-size: clamp(17px, 1.9vw, 21px);
  line-height: 1.65;
  color: var(--maroon);
}

.page-about .about-quote--warm {
  border-left-color: var(--gold);
  background: rgba(251, 248, 241, 0.7);
}

.page-about .about-method-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-layers {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-cool);
}

.page-about .about-layer {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding-block: 20px;
  border-bottom: 1px solid var(--line-cool);
}

.page-about .about-layer__num {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--copper);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--copper);
  background: var(--paper);
}

.page-about .about-layer__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.4;
  color: var(--cobalt);
}

.page-about .about-layer__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

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

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding-block: 26px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-timeline__item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-timeline__phase {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  border-left: 2px solid var(--copper);
  padding-left: 12px;
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--ochre);
}

.page-about .about-timeline__stage {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.page-about .about-timeline__content {
  padding-left: 14px;
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.2vw, 24px);
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-timeline__image {
  margin-top: 18px;
  max-width: 560px;
}

.page-about .about-timeline__image img {
  aspect-ratio: 4 / 3;
}

.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

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

.page-about .about-team__details {
  border: 1px solid var(--about-rule);
  background: var(--moon);
  padding: 0 16px;
}

.page-about .about-team__details[open] {
  border-color: var(--copper);
}

.page-about .about-team__summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-block: 14px;
  font-family: var(--font-display);
  font-size: 16.5px;
  line-height: 1.55;
  color: var(--ink);
}

.page-about .about-team__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-team__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--copper);
}

.page-about .about-team__details[open] .about-team__summary::after {
  content: "−";
}

.page-about .about-team__detail {
  margin: 0;
  padding: 0 0 16px;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-team__note {
  border: 1px solid var(--copper);
  background: var(--paper);
  padding: clamp(18px, 3vw, 26px);
}

.page-about .about-team__note-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.4;
  color: var(--maroon);
}

.page-about .about-team__steps {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-team__steps li {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-team__steps .num {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border: 1px solid var(--copper);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--copper);
}

.page-about .about-inline-link {
  color: var(--cobalt);
  text-decoration: underline;
  text-decoration-color: var(--copper);
  text-underline-offset: 3px;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--ochre);
}

.page-about .about-yunnan {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-yunnan__text p {
  margin: 0 0 16px;
  max-width: 40em;
  line-height: 1.85;
}

.page-about .about-material-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-material {
  display: grid;
  gap: 6px;
  padding-block: 16px;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-material__name {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--ochre);
}

.page-about .about-material__desc {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-actions {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-action {
  display: grid;
  gap: 8px;
  padding: 20px;
  background: var(--paper);
  border: 1px solid var(--about-rule);
  color: var(--ink);
  text-decoration: none;
  transition: border-color var(--ease), transform var(--ease), background-color var(--ease);
}

.page-about .about-action:hover,
.page-about .about-action:focus-visible {
  border-color: var(--ochre);
  background: var(--moon);
  transform: translateY(-2px);
}

.page-about .about-action__title {
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.4;
  color: var(--cobalt);
}

.page-about .about-action__text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-action__link {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ochre);
}

.page-about .about-cooperate-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: clamp(26px, 3vw, 36px);
  padding-top: 20px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-cooperate-foot p {
  margin: 0;
  max-width: 46em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink);
}

@media (min-width: 720px) {
  .page-about .about-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .about-method-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .about-timeline__item {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 28px;
  }

  .page-about .about-timeline__phase {
    position: sticky;
    top: var(--about-sticky);
    align-self: start;
    display: grid;
    gap: 6px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  }

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

  .page-about .about-yunnan {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

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

.page-about {
  --about-sticky: 96px;
  --about-rule: rgba(138, 90, 43, 0.28);
  display: block;
  background: var(--moon);
  color: var(--ink);
  overflow-x: clip;
}

.page-about .about-crumb-row {
  padding-block: 18px 8px;
}

.page-about .about-hero {
  position: relative;
  padding-block: clamp(18px, 3vw, 34px) clamp(48px, 7vw, 92px);
  background:
    linear-gradient(118deg, transparent 0 62%, rgba(31, 78, 121, 0.08) 62% 100%),
    var(--moon);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: var(--about-rule);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-hero__side {
  border-left: 2px solid var(--copper);
  padding-left: 14px;
}

.page-about .about-side-label {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--copper);
}

.page-about .about-jump__title {
  margin: 0 0 10px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  color: var(--slate);
}

.page-about .about-jump__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 7px;
}

.page-about .about-jump__link {
  display: flex;
  gap: 8px;
  align-items: baseline;
  color: var(--cobalt);
  font-size: 13px;
  line-height: 1.5;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}

.page-about .about-jump__link:hover,
.page-about .about-jump__link:focus-visible {
  color: var(--ochre);
  border-bottom-color: var(--copper);
}

.page-about .about-jump__link .num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--copper);
}

.page-about .about-hero__title {
  margin: 0;
  max-width: 16em;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 7.2vw, 78px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ochre);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: clamp(18px, 2.4vw, 28px) 0 0;
  max-width: 38em;
  font-size: clamp(16px, 1.4vw, 18px);
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 14px;
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: 18px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-fact {
  display: grid;
  gap: 6px;
}

.page-about .about-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1;
  color: var(--cobalt);
  letter-spacing: 0.02em;
}

.page-about .about-fact__label {
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--slate);
}

.page-about .about-section {
  padding-block: clamp(46px, 7vw, 88px);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-section--cool {
  background: var(--mist);
}

.page-about .about-section--paper {
  background: var(--paper);
}

.page-about .about-section--cooperate {
  background:
    linear-gradient(180deg, rgba(217, 164, 65, 0.1), transparent 52%),
    var(--moon);
}

.page-about .about-section__head {
  max-width: 760px;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-section__kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--copper);
}

.page-about .about-section__kicker .num {
  display: inline-grid;
  place-items: center;
  min-width: 28px;
  min-height: 28px;
  padding: 0 6px;
  border: 1px solid var(--copper);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--copper);
  background: var(--paper);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(27px, 4vw, 44px);
  line-height: 1.22;
  letter-spacing: -0.005em;
  color: var(--ink);
  text-wrap: balance;
}

.page-about .about-lead {
  margin: 16px 0 0;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .about-split__text p {
  margin: 0 0 16px;
  max-width: 40em;
  line-height: 1.85;
}

.page-about .about-split__text p:last-child {
  margin-bottom: 0;
}

.page-about .about-figure {
  margin: 0;
  background: var(--paper);
  border: 1px solid var(--about-rule);
  padding: 10px 10px 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
  background: var(--mist);
}

.page-about .about-figure--method img {
  aspect-ratio: 9 / 7;
}

.page-about .about-figure__caption {
  padding: 10px 2px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .about-quote {
  margin: 24px 0 0;
  padding: 18px 20px;
  border-left: 4px solid var(--copper);
  background: var(--paper);
  font-family: var(--font-display);
  font-size: clamp(17px, 1.9vw, 21px);
  line-height: 1.65;
  color: var(--maroon);
}

.page-about .about-quote--warm {
  border-left-color: var(--gold);
  background: rgba(251, 248, 241, 0.7);
}

.page-about .about-method-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-layers {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-cool);
}

.page-about .about-layer {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding-block: 20px;
  border-bottom: 1px solid var(--line-cool);
}

.page-about .about-layer__num {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--copper);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--copper);
  background: var(--paper);
}

.page-about .about-layer__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.4;
  color: var(--cobalt);
}

.page-about .about-layer__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

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

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding-block: 26px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-timeline__item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-timeline__phase {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  border-left: 2px solid var(--copper);
  padding-left: 12px;
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--ochre);
}

.page-about .about-timeline__stage {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.page-about .about-timeline__content {
  padding-left: 14px;
}

.page-about .about-timeline__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(19px, 2.2vw, 24px);
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-timeline__text {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.page-about .about-timeline__image {
  margin-top: 18px;
  max-width: 560px;
}

.page-about .about-timeline__image img {
  aspect-ratio: 4 / 3;
}

.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}

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

.page-about .about-team__details {
  border: 1px solid var(--about-rule);
  background: var(--moon);
  padding: 0 16px;
}

.page-about .about-team__details[open] {
  border-color: var(--copper);
}

.page-about .about-team__summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-block: 14px;
  font-family: var(--font-display);
  font-size: 16.5px;
  line-height: 1.55;
  color: var(--ink);
}

.page-about .about-team__summary::-webkit-details-marker {
  display: none;
}

.page-about .about-team__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--copper);
}

.page-about .about-team__details[open] .about-team__summary::after {
  content: "−";
}

.page-about .about-team__detail {
  margin: 0;
  padding: 0 0 16px;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-team__note {
  border: 1px solid var(--copper);
  background: var(--paper);
  padding: clamp(18px, 3vw, 26px);
}

.page-about .about-team__note-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.4;
  color: var(--maroon);
}

.page-about .about-team__steps {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-team__steps li {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-team__steps .num {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border: 1px solid var(--copper);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--copper);
}

.page-about .about-inline-link {
  color: var(--cobalt);
  text-decoration: underline;
  text-decoration-color: var(--copper);
  text-underline-offset: 3px;
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--ochre);
}

.page-about .about-yunnan {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-about .about-yunnan__text p {
  margin: 0 0 16px;
  max-width: 40em;
  line-height: 1.85;
}

.page-about .about-material-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-material {
  display: grid;
  gap: 6px;
  padding-block: 16px;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-material__name {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--ochre);
}

.page-about .about-material__desc {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-actions {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-action {
  display: grid;
  gap: 8px;
  padding: 20px;
  background: var(--paper);
  border: 1px solid var(--about-rule);
  color: var(--ink);
  text-decoration: none;
  transition: border-color var(--ease), transform var(--ease), background-color var(--ease);
}

.page-about .about-action:hover,
.page-about .about-action:focus-visible {
  border-color: var(--ochre);
  background: var(--moon);
  transform: translateY(-2px);
}

.page-about .about-action__title {
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.4;
  color: var(--cobalt);
}

.page-about .about-action__text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .about-action__link {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--ochre);
}

.page-about .about-cooperate-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: clamp(26px, 3vw, 36px);
  padding-top: 20px;
  border-top: 1px solid var(--about-rule);
}

.page-about .about-cooperate-foot p {
  margin: 0;
  max-width: 46em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink);
}

@media (min-width: 720px) {
  .page-about .about-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .about-method-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .about-timeline__item {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 28px;
  }

  .page-about .about-timeline__phase {
    position: sticky;
    top: var(--about-sticky);
    align-self: start;
    display: grid;
    gap: 6px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
  }

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

  .page-about .about-yunnan {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

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