.page-about {
  --about-ink-line: 1px solid rgba(11, 43, 36, 0.14);
  --about-sand-line: 1px solid rgba(200, 169, 107, 0.42);
  --about-light-line: 1px solid rgba(234, 217, 181, 0.24);
}

.page-about .about-crumb-wrap {
  padding-top: clamp(0.9rem, 2.5vw, 1.4rem);
  padding-bottom: 0.4rem;
}

.page-about .breadcrumb-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  padding: 0;
  font-size: 0.82rem;
  color: var(--rock);
}

.page-about .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 0.35rem;
  color: rgba(110, 117, 109, 0.55);
}

.page-about .breadcrumb-link {
  color: var(--moss);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease;
}

.page-about .breadcrumb-link:hover,
.page-about .breadcrumb-link:focus-visible {
  border-bottom-color: var(--sand);
}

.page-about .breadcrumb-current {
  color: var(--rock);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  margin-top: clamp(0.8rem, 2vw, 1.2rem);
  padding: clamp(2.2rem, 5vw, 4.4rem) 0 clamp(2.4rem, 5vw, 4rem);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(79, 224, 208, 0.12) 0%, rgba(79, 224, 208, 0) 55%),
    linear-gradient(158deg, var(--ink-green) 0%, var(--moss) 100%);
  color: var(--rice);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, rgba(200, 169, 107, 0.65), rgba(200, 169, 107, 0));
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.8rem, 4vw, 3rem);
  align-items: end;
}

.page-about .about-hero-copy .eyebrow {
  color: var(--sand);
  margin-bottom: 0.85rem;
}

.page-about .about-hero h1 {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(1.85rem, 4.4vw, 3.4rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  margin: 0 0 1.15rem;
  color: var(--rice);
  max-width: 17ch;
}

.page-about .about-hero-lede {
  font-size: clamp(0.96rem, 1.05vw, 1.06rem);
  line-height: 1.88;
  color: rgba(245, 240, 230, 0.84);
  max-width: 40em;
  margin: 0;
}

.page-about .about-hero-facts {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.1rem 1.4rem;
  margin: clamp(1.6rem, 3vw, 2.2rem) 0 0;
  padding: clamp(1.1rem, 2.4vw, 1.5rem) 0 0;
  border-top: var(--about-light-line);
}

.page-about .about-hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
}

.page-about .about-hero-facts .mono {
  font-family: var(--font-mono);
  font-size: clamp(0.98rem, 1.5vw, 1.1rem);
  font-weight: 500;
  color: var(--sand);
  letter-spacing: 0.01em;
}

.page-about .about-hero-facts li > span:last-child {
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  color: rgba(245, 240, 230, 0.58);
}

.page-about .about-hero-figure {
  margin: 0;
  aspect-ratio: 4 / 5;
  border: 1px solid rgba(234, 217, 181, 0.18);
  border-radius: 2px;
}

/* 通用区块头部 */
.page-about .about-head {
  max-width: 46rem;
}

.page-about .about-head h2 {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(1.45rem, 2.6vw, 2.15rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
  margin: 0.55rem 0 0.8rem;
}

.page-about .about-lede {
  font-size: clamp(0.94rem, 1.02vw, 1rem);
  line-height: 1.88;
  margin: 0;
  max-width: 40em;
}

.page-about .about-inline-link {
  margin: 1rem 0 0;
  font-size: 0.92rem;
  line-height: 1.8;
}

.page-about .about-inline-link a {
  color: var(--moss);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 169, 107, 0.55);
  transition: border-color 0.25s ease, color 0.25s ease;
}

.page-about .about-inline-link a:hover,
.page-about .about-inline-link a:focus-visible {
  color: var(--clay);
  border-bottom-color: var(--clay);
}

/* 时间线 */
.page-about .about-timeline {
  padding-block: clamp(2.5rem, 6vw, 5rem);
}

.page-about .about-timeline-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.8rem, 4vw, 3rem);
}

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

.page-about .timeline-item {
  position: relative;
  border-left: var(--about-sand-line);
  padding: 0 0 clamp(1.4rem, 3vw, 2.1rem) clamp(1.3rem, 3vw, 2.1rem);
}

.page-about .timeline-item:last-child {
  padding-bottom: 0;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: -4.5px;
  top: 0.5em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--rice);
  border: 1px solid var(--sand);
  transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .timeline-item:last-child::before {
  background: var(--sand);
  border-color: var(--sand);
  box-shadow: 0 0 0 4px rgba(200, 169, 107, 0.22);
}

.page-about .timeline-item:hover::before,
.page-about .timeline-item:focus-within::before {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .timeline-year {
  font-family: var(--font-mono);
  font-size: clamp(0.98rem, 1.4vw, 1.06rem);
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--moss);
  margin: 0 0 0.3rem;
  transition: color 0.25s ease;
}

.page-about .timeline-item:hover .timeline-year {
  color: var(--clay);
}

.page-about .timeline-body h3 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: clamp(1.02rem, 1.5vw, 1.12rem);
  line-height: 1.36;
  margin: 0 0 0.35rem;
  color: var(--ink-green);
}

.page-about .timeline-body p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.82;
  color: rgba(20, 26, 23, 0.76);
  max-width: 34em;
}

.page-about .about-timeline-figure {
  margin: 0;
  aspect-ratio: 4 / 3;
  border-radius: 2px;
  overflow: hidden;
}

/* 团队 */
.page-about .about-teams {
  padding-block: clamp(2.4rem, 5.5vw, 4.6rem);
  background: linear-gradient(180deg, rgba(31, 74, 58, 0.055), rgba(31, 74, 58, 0));
}

.page-about .team-grid {
  list-style: none;
  margin: clamp(1.8rem, 4vw, 2.8rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}

.page-about .team-grid > li {
  display: flex;
  flex-direction: column;
  gap: 0.32rem;
  padding: 1.15rem 0;
  border-top: 1px solid rgba(215, 210, 197, 0.95);
}

.page-about .team-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--sand);
}

.page-about .team-grid h3 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: clamp(1rem, 1.3vw, 1.06rem);
  line-height: 1.3;
  margin: 0;
  color: var(--ink-green);
}

.page-about .team-grid p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.78;
  color: rgba(20, 26, 23, 0.72);
}

.page-about .team-foot {
  margin: clamp(1.4rem, 3vw, 2.1rem) 0 0;
  font-size: 0.93rem;
  line-height: 1.85;
  color: var(--moss);
  max-width: 40em;
}

/* 会员 */
.page-about .about-members {
  padding-block: clamp(2.6rem, 6.5vw, 5.4rem);
  background: linear-gradient(168deg, var(--moss) 0%, var(--ink-green) 100%);
  color: var(--rice);
}

.page-about .about-members .about-head h2 {
  color: var(--rice);
}

.page-about .about-members .about-lede {
  color: rgba(245, 240, 230, 0.82);
}

.page-about .members-stair {
  list-style: none;
  margin: clamp(1.8rem, 3.6vw, 2.8rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1rem, 2vw, 1.5rem);
}

.page-about .members-stair > li {
  position: relative;
  padding: clamp(1.15rem, 2.4vw, 1.6rem) 0 0;
  border-top: 1px solid rgba(234, 217, 181, 0.22);
}

.page-about .members-stair > li::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  height: 2px;
  width: 34%;
  background: var(--sand);
  transition: width 0.35s ease, background 0.35s ease;
}

.page-about .members-stair > li:nth-child(2)::before {
  width: 62%;
}

.page-about .members-stair > li:nth-child(3)::before {
  width: 100%;
}

.page-about .members-stair > li:hover::before {
  background: var(--cyan);
}

.page-about .member-tier {
  font-family: var(--font-mono);
  font-size: 0.79rem;
  letter-spacing: 0.07em;
  color: var(--sand);
  margin: 0 0 0.5rem;
}

.page-about .members-stair h3 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: clamp(1.02rem, 1.5vw, 1.12rem);
  line-height: 1.36;
  margin: 0 0 0.5rem;
  color: var(--rice);
}

.page-about .members-stair p:last-child {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.82;
  color: rgba(245, 240, 230, 0.74);
  max-width: 30em;
}

.page-about .members-note {
  margin: clamp(1.5rem, 3vw, 2.2rem) 0 0;
  font-size: 0.89rem;
  line-height: 1.82;
  color: rgba(245, 240, 230, 0.7);
}

.page-about .members-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 224, 208, 0.42);
  transition: border-color 0.25s ease;
}

.page-about .members-note a:hover,
.page-about .members-note a:focus-visible {
  border-bottom-color: var(--cyan);
}

/* 合作生态 */
.page-about .about-eco {
  padding-block: clamp(2.4rem, 6vw, 4.8rem);
}

.page-about .about-eco-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.6rem, 4vw, 2.8rem);
}

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

.page-about .eco-stats li {
  display: grid;
  grid-template-columns: minmax(0, 6.5rem) minmax(0, 1fr);
  gap: 0.35rem 1.1rem;
  align-items: baseline;
  padding: clamp(0.85rem, 2vw, 1.1rem) 0;
  border-bottom: 1px solid rgba(215, 210, 197, 0.85);
}

.page-about .eco-stats li:first-child {
  border-top: 1px solid rgba(215, 210, 197, 0.85);
}

.page-about .eco-num {
  font-family: var(--font-mono);
  font-size: clamp(1.02rem, 1.8vw, 1.3rem);
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--sand);
  white-space: nowrap;
}

.page-about .eco-label {
  font-size: 0.9rem;
  line-height: 1.72;
  color: rgba(20, 26, 23, 0.76);
}

/* 开放日 */
.page-about .about-openday {
  padding-block: clamp(2.6rem, 6.5vw, 5.4rem);
  background: linear-gradient(180deg, rgba(31, 74, 58, 0.06), rgba(31, 74, 58, 0));
}

.page-about .route-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1rem, 2.4vw, 1.5rem);
  margin: clamp(1.8rem, 3.6vw, 2.8rem) 0 0;
}

.page-about .route-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: clamp(1.25rem, 2.6vw, 1.7rem);
  background: rgba(245, 240, 230, 0.62);
  border: 1px solid rgba(215, 210, 197, 0.92);
  border-radius: 2px;
  transition: border-color 0.3s ease;
}

.page-about .route-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid transparent;
  border-radius: 2px;
  pointer-events: none;
  transition: inset 0.3s ease, border-color 0.3s ease;
}

.page-about .route-card:hover,
.page-about .route-card:focus-within {
  border-color: var(--sand);
}

.page-about .route-card:hover::after,
.page-about .route-card:focus-within::after {
  inset: -6px;
  border-color: rgba(200, 169, 107, 0.34);
}

.page-about .route-num {
  font-family: var(--font-mono);
  font-size: 0.77rem;
  letter-spacing: 0.08em;
  color: var(--sand);
  margin: 0;
}

.page-about .route-card h3 {
  font-family: var(--font-title);
  font-weight: 700;
  font-size: clamp(1.04rem, 1.5vw, 1.12rem);
  line-height: 1.32;
  margin: 0;
  color: var(--ink-green);
}

.page-about .route-desc {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: rgba(20, 26, 23, 0.74);
}

.page-about .route-meta {
  margin: auto 0 0;
  padding-top: 0.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.page-about .about-openday-figure {
  margin: clamp(1.6rem, 3.5vw, 2.6rem) 0 0;
  aspect-ratio: 16 / 9;
  border-radius: 2px;
  overflow: hidden;
}

.page-about .about-cta {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: clamp(1.6rem, 3.4vw, 2.4rem);
  padding-top: clamp(1.2rem, 2.6vw, 1.8rem);
  border-top: var(--about-ink-line);
}

.page-about .about-cta p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.82;
  color: var(--moss);
  max-width: 38em;
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* 图片统一 */
.page-about .media-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 响应式 */
@media (min-width: 640px) {
  .page-about .about-hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 899px) {
  .page-about .about-hero-figure {
    aspect-ratio: 16 / 10;
  }
}

@media (min-width: 760px) {
  .page-about .members-stair {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .route-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-cta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
  }
}

@media (min-width: 780px) {
  .page-about .team-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    padding-bottom: 3.4rem;
  }
  .page-about .team-grid > li {
    padding: 1.1rem 1.05rem 0 0;
  }
  .page-about .team-grid > li:nth-child(2) {
    transform: translateY(0.8rem);
  }
  .page-about .team-grid > li:nth-child(3) {
    transform: translateY(1.6rem);
  }
  .page-about .team-grid > li:nth-child(4) {
    transform: translateY(2.4rem);
  }
  .page-about .team-grid > li:nth-child(5) {
    transform: translateY(1.2rem);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.14fr) minmax(0, 0.86fr);
    gap: clamp(2rem, 4.5vw, 3.4rem);
  }
  .page-about .about-eco-grid {
    grid-template-columns: minmax(0, 0.94fr) minmax(0, 1.06fr);
    column-gap: clamp(2.4rem, 5vw, 4.4rem);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-timeline-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    column-gap: clamp(2.4rem, 5vw, 4.4rem);
    align-items: start;
  }
  .page-about .about-timeline-grid .about-head {
    grid-column: 1 / -1;
  }
  .page-about .timeline {
    grid-column: 1;
  }
  .page-about .about-timeline-figure {
    grid-column: 2;
    margin: 0;
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }
}

@media (max-width: 420px) {
  .page-about .about-hero h1 {
    max-width: none;
  }
  .page-about .eco-stats li {
    grid-template-columns: 1fr;
    gap: 0.3rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .route-card,
  .page-about .route-card::after,
  .page-about .timeline-item::before,
  .page-about .timeline-year,
  .page-about .members-stair > li::before,
  .page-about .breadcrumb-link {
    transition: none;
  }
  .page-about .team-grid > li {
    transform: none;
  }
}
<<<END>>>