.page-about {
  --about-line: var(--steel);
  --about-ink-soft: rgba(36, 28, 20, 0.66);
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  padding-bottom: 56px;
  overflow-x: clip;
}

.page-about .breadcrumb {
  margin: 18px 0 24px;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ---------- 通用链接与按钮 ---------- */
.page-about .about-link {
  display: inline-block;
  color: var(--cream);
  text-decoration: none;
  font-size: 15px;
  padding-bottom: 2px;
  box-shadow: inset 0 -1px 0 var(--about-line);
  transition: color var(--dur) ease, box-shadow var(--dur) ease;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--amber);
  box-shadow: inset 0 -3px 0 var(--orange);
}

.page-about .about-link:focus-visible {
  outline: 2px solid var(--jade);
  outline-offset: 3px;
}

.page-about .about-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--orange);
  color: var(--ink);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.01em;
  text-decoration: none;
  padding: 14px 34px 16px 26px;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 86%);
  transition: background var(--dur) ease;
}

.page-about .about-btn:hover,
.page-about .about-btn:focus-visible {
  background: var(--amber);
}

.page-about .about-btn:focus-visible {
  outline: 2px solid var(--jade);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 28px;
  align-items: start;
  padding: 4px 0 40px;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-hero__index {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(52px, 10vw, 88px);
  line-height: 0.82;
  font-weight: 700;
  letter-spacing: -0.05em;
  color: var(--steel);
}

.page-about .about-hero__index::after {
  content: "";
  display: block;
  width: 44px;
  height: 3px;
  background: var(--orange);
  margin-top: 16px;
}

.page-about .about-hero__kicker {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 18px 0 0;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(32px, 6vw, 62px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--cream);
  max-width: 13em;
}

.page-about .about-hero__intro {
  margin: 20px 0 0;
  max-width: 34em;
  color: var(--text);
}

.page-about .about-hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

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

.page-about .about-hero__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 92%);
}

.page-about .figure__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding: 44px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-section--end {
  border-bottom: 0;
  padding-bottom: 24px;
}

.page-about .about-section .section-head {
  margin-bottom: 26px;
}

/* ---------- 01 我们做什么 ---------- */
.page-about .about-what {
  display: grid;
  gap: 24px;
}

.page-about .about-what__prose p {
  margin: 0 0 16px;
  max-width: 34em;
}

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

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

.page-about .about-what__list li {
  background: var(--ink);
}

.page-about .about-what__list a {
  display: block;
  padding: 16px 16px 18px;
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: background var(--dur) ease, border-color var(--dur) ease;
}

.page-about .about-what__list a:hover,
.page-about .about-what__list a:focus-visible {
  background: var(--deck);
  border-left-color: var(--orange);
}

.page-about .about-what__list a:focus-visible {
  outline: 2px solid var(--jade);
  outline-offset: -2px;
}

.page-about .about-what__name {
  margin: 10px 0 5px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--cream);
}

.page-about .about-what__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 02 时间线 ---------- */
.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-tl__item {
  position: relative;
  display: grid;
  gap: 12px;
  padding: 0 0 34px 22px;
  border-left: 1px solid var(--about-line);
}

.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 12px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--orange);
}

.page-about .about-tl__year {
  font-family: var(--font-mono);
  font-size: clamp(34px, 6vw, 52px);
  line-height: 0.9;
  font-weight: 700;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--cream);
}

.page-about .about-tl__card {
  background: var(--cream);
  color: var(--brown);
  padding: 20px 20px 18px;
  border: 1px solid transparent;
  transition: transform var(--dur) ease, border-color var(--dur) ease;
}

.page-about .about-tl__card:hover,
.page-about .about-tl__card:focus-within {
  transform: translateX(-2px);
  border-color: var(--orange);
}

.page-about .about-tl__card h3 {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--brown);
}

.page-about .about-tl__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--brown);
}

.page-about .about-tl__more {
  margin: 12px 0 0;
  padding-left: 10px;
  border-left: 2px solid transparent;
  font-size: 13px;
  line-height: 1.65;
  color: var(--about-ink-soft);
  transition: color var(--dur) ease, border-color var(--dur) ease;
}

.page-about .about-tl__card:hover .about-tl__more,
.page-about .about-tl__card:focus-within .about-tl__more {
  color: var(--brown);
  border-left-color: var(--orange);
}

.page-about .about-tl__link {
  margin-top: 14px;
  font-size: 14px;
  color: var(--brown);
  box-shadow: inset 0 -1px 0 rgba(36, 28, 20, 0.3);
}

.page-about .about-tl__link:hover,
.page-about .about-tl__link:focus-visible {
  color: var(--orange);
  box-shadow: inset 0 -3px 0 var(--orange);
}

.page-about .about-tl__link:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

.page-about .about-tl__figureitem {
  padding-bottom: 34px;
}

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

.page-about .about-tl__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
}

/* ---------- 03 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 1px;
  background: var(--about-line);
  border-top: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-team__cell {
  background: var(--ink);
  padding: 24px 20px 26px;
}

.page-about .about-team__num {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-size: clamp(46px, 9vw, 68px);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
  color: var(--jade);
}

.page-about .about-team__cell:nth-child(2) .about-team__num {
  color: var(--cream);
}

.page-about .about-team__cell:nth-child(3) .about-team__num {
  color: var(--amber);
}

.page-about .about-team__unit {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--mist);
}

.page-about .about-team__name {
  margin: 14px 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--cream);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 04 流程 ---------- */
.page-about .about-process {
  display: grid;
  gap: 28px;
}

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

.page-about .about-flow__step {
  position: relative;
  display: grid;
  gap: 4px;
  padding: 18px 0 18px 18px;
  border-top: 1px solid var(--about-line);
}

.page-about .about-flow__step::before {
  content: "";
  position: absolute;
  left: 0;
  top: -4px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--jade);
}

.page-about .about-flow__num {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--dim);
}

.page-about .about-flow__name {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--cream);
}

.page-about .about-flow__desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .about-notes {
  display: grid;
  gap: 1px;
  margin-top: 26px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .about-note {
  background: var(--deck);
}

.page-about .about-note summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--cream);
}

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

.page-about .about-note summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--orange);
}

.page-about .about-note[open] summary::after {
  content: "\2013";
}

.page-about .about-note summary:focus-visible {
  outline: 2px solid var(--jade);
  outline-offset: -2px;
}

.page-about .about-note p {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text);
}

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

.page-about .about-process__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 90%);
}

/* ---------- 05 区域 ---------- */
.page-about .about-region {
  display: grid;
  gap: 28px;
}

.page-about .about-region__lead p {
  margin: 0 0 16px;
  max-width: 34em;
}

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

.page-about .about-region__stats {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
}

.page-about .about-region__stat {
  background: var(--deck);
  padding: 16px 14px 18px;
}

.page-about .about-region__stat dt {
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.page-about .about-region__stat dd {
  margin: 8px 0 0;
  display: flex;
  align-items: baseline;
  gap: 5px;
  color: var(--cream);
}

.page-about .about-region__num {
  font-size: clamp(28px, 6vw, 40px);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.page-about .about-region__unit {
  font-size: 13px;
  color: var(--mist);
}

/* ---------- 06 联系 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 26px;
  border-top: 1px solid var(--about-line);
  padding-top: 26px;
}

.page-about .about-cta__lede {
  margin: 0 0 18px;
  max-width: 34em;
}

.page-about .about-cta__list {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: grid;
  gap: 12px;
  max-width: 36em;
}

.page-about .about-cta__list li {
  padding-left: 14px;
  border-left: 2px solid var(--steel);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

.page-about .about-cta__list strong {
  color: var(--cream);
  font-weight: 700;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.page-about .about-cta__note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
  max-width: 34em;
}

.page-about .about-cta__aside {
  background: var(--deck);
  border-left: 3px solid var(--orange);
  padding: 22px 20px 24px;
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-cta__aside p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-cta__aside .about-link {
  justify-self: start;
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-about .about-flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-flow__step {
    padding: 20px 14px 18px 0;
  }

  .page-about .about-notes {
    grid-template-columns: 1.2fr 1fr 0.92fr;
  }

  .page-about .about-region__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .about-tl__item {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 30px;
    padding-left: 30px;
    padding-bottom: 40px;
  }

  .page-about .about-tl__item::before {
    left: -6px;
    width: 11px;
    height: 11px;
  }

  .page-about .about-tl__year {
    padding-top: 4px;
  }

  .page-about .about-tl__figureitem {
    padding-bottom: 40px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 52px;
    align-items: end;
    min-height: 78vh;
    padding-bottom: 52px;
  }

  .page-about .about-what {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-team {
    grid-template-columns: 1.25fr 1fr 0.9fr;
  }

  .page-about .about-team__cell {
    padding: 28px 24px 30px;
  }

  .page-about .about-process {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

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

  .page-about .about-cta {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 44px;
  }

  .page-about .about-section {
    padding: 60px 0;
  }

  .page-about .about-section--end {
    padding-bottom: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-link,
  .page-about .about-btn,
  .page-about .about-what__list a,
  .page-about .about-tl__card,
  .page-about .about-tl__more {
    transition: none;
  }

  .page-about .about-tl__card:hover,
  .page-about .about-tl__card:focus-within {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>