.page-about {
  --about-tl-gutter: 68px;
  --about-tl-gap: 24px;
  --about-pad-block: 64px;
}

.page-about .about-hero {
  padding-top: 28px;
  padding-bottom: 0;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
  align-items: end;
}

.page-about .about-hero__lead {
  min-width: 0;
}

.page-about .about-hero__title {
  display: flex;
  flex-direction: column;
  margin: 14px 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(42px, 9vw, 84px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  color: var(--c-graphite);
}

.page-about .about-hero__title span:last-child {
  color: var(--c-ink-green);
}

.page-about .about-hero__title span:last-child::before {
  content: "";
  display: inline-block;
  width: 0.1em;
  height: 0.74em;
  margin-right: 0.22em;
  vertical-align: -0.02em;
  background: var(--c-orange);
}

.page-about .about-hero__lede {
  max-width: 36em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--c-graphite);
}

.page-about .about-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero__tags li {
  padding: 5px 11px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-paper);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-field);
}

.page-about .about-hero__figure {
  margin: 0;
  min-width: 0;
}

.page-about .about-hero__figure figcaption,
.page-about .about-history__figure figcaption,
.page-about .about-partners__figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-mist);
}

.page-about .about-quote {
  margin: 36px 0 0;
  padding: 20px 22px;
  border-left: 4px solid var(--c-orange);
  background: var(--c-paper);
  font-family: var(--font-display);
  font-size: clamp(20px, 3.4vw, 30px);
  font-weight: 700;
  line-height: 1.35;
  color: var(--c-ink-green);
}

.page-about .about-quote p {
  margin: 0;
}

/* 数字墙 */
.page-about .about-numbers {
  margin-top: var(--about-pad-block);
  padding-block: 52px 68px;
  background: linear-gradient(158deg, var(--c-ink-green) 0%, var(--c-field) 62%, var(--c-ink-green) 100%);
  color: var(--c-cream);
}

.page-about .about-numbers__head h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 800;
  line-height: 1.15;
  color: var(--c-paper);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 20px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stat {
  min-width: 0;
  padding-top: 12px;
  border-top: 1px solid rgba(246, 239, 225, 0.24);
}

.page-about .about-stat .num {
  display: block;
  margin-bottom: 6px;
  font-size: clamp(34px, 5vw, 54px);
  font-weight: 600;
  line-height: 1;
  color: var(--c-cyan);
}

.page-about .about-stat p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(246, 239, 225, 0.78);
}

/* 起点 */
.page-about .about-origin__grid {
  display: grid;
  gap: 32px;
  align-items: start;
}

.page-about .about-origin__text h2,
.page-about .about-team__head h2,
.page-about .about-history__head h2,
.page-about .about-partners__text h2,
.page-about .about-region__intro h2 {
  margin: 12px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(27px, 4.2vw, 44px);
  font-weight: 800;
  line-height: 1.12;
  color: var(--c-graphite);
}

.page-about .about-origin__text p {
  max-width: 62ch;
  margin: 0 0 1.15em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--c-graphite);
}

.page-about .about-origin__text a {
  color: var(--c-cyan-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-about .about-origin__text a:hover {
  color: var(--c-orange-deep);
}

.page-about .about-lines {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-lines li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  grid-template-areas:
    "no name"
    "no desc";
  gap: 2px 10px;
  padding: 14px 0;
  border-bottom: 1px solid var(--c-line);
}

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

.page-about .about-lines .num {
  grid-area: no;
  font-size: 14px;
  color: var(--c-orange);
  padding-top: 3px;
}

.page-about .about-lines strong {
  grid-area: name;
  font-size: 16px;
  color: var(--c-ink-green);
}

.page-about .about-lines span:last-child {
  grid-area: desc;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-mist);
}

/* 团队 */
.page-about .about-team__head {
  max-width: 60ch;
}

.page-about .about-team__lede {
  margin: 0 0 30px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-about .about-team__grid {
  display: grid;
  gap: 20px;
}

.page-about .about-role {
  min-width: 0;
  padding: 22px 20px 24px;
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-orange);
  background: var(--c-paper);
}

.page-about .about-role:nth-child(2) {
  border-top-color: var(--c-cyan-deep);
}

.page-about .about-role__no {
  display: block;
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-mist);
}

.page-about .about-role h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 23px;
  font-weight: 800;
  line-height: 1.2;
  color: var(--c-ink-green);
}

.page-about .about-role p {
  margin: 0 0 0.9em;
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-graphite);
}

.page-about .about-role p:last-of-type {
  margin-bottom: 0;
}

.page-about .about-role--ask {
  border: 0;
  border-top: 3px solid var(--c-cyan);
  background: var(--c-ink-green);
}

.page-about .about-role--ask .about-role__no {
  color: var(--c-cyan);
}

.page-about .about-role--ask h3 {
  color: var(--c-paper);
}

.page-about .about-role--ask p {
  color: rgba(246, 239, 225, 0.82);
}

.page-about .about-role--ask .btn {
  margin-top: 16px;
}

/* 时间线 */
.page-about .about-history__head {
  max-width: 60ch;
}

.page-about .about-history__head p {
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-about .about-history__figure {
  margin: 0 0 34px;
}

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

.page-about .about-timeline li {
  position: relative;
  padding-left: 30px;
}

.page-about .about-timeline li::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--c-line);
}

.page-about .about-timeline li:first-child::before {
  top: 22px;
}

.page-about .about-timeline li:last-child::before {
  bottom: calc(100% - 22px);
}

.page-about .about-timeline li::after {
  content: "";
  position: absolute;
  left: 3px;
  top: 17px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 3px solid var(--c-cyan-deep);
  background: var(--c-cream);
  box-sizing: border-box;
}

.page-about .about-tl summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 22px;
  grid-template-areas:
    "ver chev"
    "title chev";
  gap: 6px 12px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-tl summary:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 4px;
}

.page-about .about-tl__ver {
  grid-area: ver;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--c-orange-deep);
}

.page-about .about-tl__title {
  grid-area: title;
  font-family: var(--font-display);
  font-size: clamp(20px, 3.2vw, 27px);
  font-weight: 800;
  line-height: 1.2;
  color: var(--c-graphite);
}

.page-about .about-tl__chev {
  grid-area: chev;
  align-self: center;
  justify-self: end;
  width: 11px;
  height: 11px;
  border-right: 2px solid var(--c-mist);
  border-bottom: 2px solid var(--c-mist);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform var(--dur-base) var(--ease);
}

.page-about .about-tl[open] .about-tl__chev {
  transform: rotate(-135deg) translate(-2px, -2px);
}

.page-about .about-tl__body {
  padding: 0 0 20px;
}

.page-about .about-tl__body p {
  max-width: 62ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-graphite);
}

/* 合作生态 */
.page-about .about-partners__grid {
  display: grid;
  gap: 30px;
  align-items: start;
}

.page-about .about-partners__list {
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.page-about .about-partners__list li {
  padding: 13px 0;
  border-bottom: 1px solid var(--c-line);
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-graphite);
}

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

.page-about .about-partners__list strong {
  display: block;
  margin-bottom: 3px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--c-ink-green);
}

.page-about .about-inline-link {
  display: inline-block;
  padding-bottom: 3px;
  border-bottom: 2px solid var(--c-orange);
  font-size: 15px;
  font-weight: 600;
  color: var(--c-ink-green);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-about .about-inline-link:hover {
  color: var(--c-orange-deep);
  border-color: var(--c-orange-deep);
}

.page-about .about-partners__figure {
  margin: 0;
  min-width: 0;
}

/* 服务地区与联系 */
.page-about .about-region {
  margin-top: var(--about-pad-block);
  padding-block: 56px 64px;
  background: linear-gradient(200deg, var(--c-ink-green) 0%, var(--c-field) 100%);
  color: var(--c-cream);
}

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

.page-about .about-region__intro h2 {
  color: var(--c-paper);
}

.page-about .about-region__intro p {
  max-width: 56ch;
  margin: 0 0 1.1em;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(246, 239, 225, 0.84);
}

.page-about .about-region__contact {
  padding: 24px 22px 26px;
  border: 1px solid rgba(246, 239, 225, 0.22);
  background: rgba(246, 239, 225, 0.05);
}

.page-about .about-region__kicker {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

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

.page-about .about-contact div {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(246, 239, 225, 0.16);
}

.page-about .about-contact div:last-child {
  border-bottom: 0;
}

.page-about .about-contact dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  line-height: 1.9;
  color: var(--c-cyan);
}

.page-about .about-contact dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--c-paper);
  word-break: break-word;
}

.page-about .about-region__note {
  margin: 16px 0 20px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(246, 239, 225, 0.72);
}

.page-about .about-region__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-region__actions .btn--ghost {
  border-color: rgba(246, 239, 225, 0.5);
  color: var(--c-paper);
}

.page-about .about-region__actions .btn--ghost:hover {
  border-color: var(--c-cyan);
  color: var(--c-cyan);
}

@media (min-width: 760px) {
  .page-about .about-hero {
    padding-top: 40px;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 20px 18px;
    margin-top: 40px;
  }

  .page-about .about-stat:nth-child(even) {
    transform: translateY(18px);
  }

  .page-about .about-numbers {
    padding-block: 60px 84px;
  }

  .page-about .about-quote {
    margin-top: 44px;
    padding: 24px 30px;
  }

  .page-about .about-timeline li {
    padding-left: calc(var(--about-tl-gutter) + var(--about-tl-gap));
  }

  .page-about .about-timeline li::before {
    left: calc(var(--about-tl-gutter) + 12px);
  }

  .page-about .about-timeline li::after {
    left: calc(var(--about-tl-gutter) + 6px);
    top: 24px;
  }

  .page-about .about-tl summary {
    grid-template-columns: var(--about-tl-gutter) minmax(0, 1fr) 22px;
    grid-template-areas: "ver title chev";
    gap: 0 var(--about-tl-gap);
    align-items: baseline;
    padding: 22px 0;
  }

  .page-about .about-tl__ver {
    font-size: 15px;
    text-align: right;
  }

  .page-about .about-tl__chev {
    align-self: center;
  }

  .page-about .about-tl__body {
    padding: 0 46px 24px calc(var(--about-tl-gutter) + var(--about-tl-gap));
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 4fr) minmax(0, 3fr);
    align-items: start;
  }

  .page-about .about-role {
    padding: 26px 22px 28px;
  }

  .page-about .about-role:nth-child(2) {
    margin-top: 26px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 48px;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: 48px;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: center;
  }

  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__chev,
  .page-about .about-inline-link {
    transition: none;
  }
}
<<<END>>>