.page-about {
  --ab-line: rgba(127, 169, 160, 0.42);
  --ab-line-soft: rgba(127, 169, 160, 0.20);
  --ab-grid: rgba(127, 169, 160, 0.14);
  --ab-gap: clamp(14px, 2.2vw, 26px);

  display: block;
  color: var(--c-stone);
  font-family: var(--font-body);
  font-size: var(--fs-17);
  line-height: 1.85;
  background-color: var(--c-cream);
  background-image:
    linear-gradient(var(--ab-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--ab-grid) 1px, transparent 1px);
  background-size: var(--rule) var(--rule);
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: clamp(18px, 3.4vw, 34px);
}
.page-about .about-crumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--fs-14);
  color: var(--c-mist);
}
.page-about .about-crumb li + li::before {
  content: "／";
  margin-right: 8px;
  color: var(--ab-line);
}
.page-about .about-crumb a {
  color: var(--c-moss);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.page-about .about-crumb a:hover {
  color: var(--c-clay);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  padding-top: clamp(24px, 4.5vw, 52px);
  padding-bottom: clamp(34px, 6vw, 66px);
}
@media (min-width: 940px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }
}
.page-about .about-kicker {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--c-clay);
}
.page-about .about-hero h1 {
  margin: 0 0 22px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5vw, 58px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}
.page-about .about-hl {
  background-image: linear-gradient(transparent 64%, var(--c-gold-soft) 64%);
  background-repeat: no-repeat;
  padding-bottom: 0.06em;
}
.page-about .about-hero__lede {
  margin: 0 0 26px;
  max-width: 62ch;
  font-size: clamp(17px, 1.5vw, 19px);
  line-height: 1.86;
  color: var(--c-stone);
}
.page-about .about-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 首屏右侧板块速览 */
.page-about .about-hero__index {
  border: 2px solid var(--c-grass);
  border-radius: var(--r-b);
  background: var(--c-sand);
  padding: clamp(18px, 2.6vw, 28px);
}
.page-about .hero-index__title {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.18em;
  color: var(--c-moss);
  font-weight: 600;
}
.page-about .hero-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .hero-index__list li:not(:last-child) {
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--ab-line);
}
.page-about .hero-index__list a {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  text-decoration: none;
  color: var(--c-ink);
  transition: color 180ms var(--ease);
}
.page-about .hero-index__list a:hover {
  color: var(--c-clay);
}
.page-about .hero-index__no {
  font-family: var(--font-mono);
  font-size: var(--fs-22);
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-gold);
  font-variant-numeric: tabular-nums;
}
.page-about .hero-index__txt {
  font-size: var(--fs-14);
  line-height: 1.78;
  color: var(--c-stone);
}
.page-about .hero-index__list a:hover .hero-index__txt {
  color: var(--c-ink);
}

/* ---------- 区块标题 ---------- */
.page-about .about-block,
.page-about .about-timeline {
  padding-top: clamp(46px, 7vw, 84px);
}
.page-about .about-sec-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(22px, 3.6vw, 38px);
}
@media (min-width: 880px) {
  .page-about .about-sec-head {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 0 clamp(20px, 3.6vw, 40px);
  }
}
.page-about .about-sec-no {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 5vw, 62px);
  line-height: 0.92;
  color: var(--c-gold);
  font-variant-numeric: tabular-nums;
}
.page-about .about-sec-head h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(23px, 3vw, 34px);
  line-height: 1.32;
  color: var(--c-ink);
}
.page-about .about-sec-head p {
  margin: 0;
  max-width: 66ch;
}

/* ---------- 时间轴 ---------- */
.page-about .tl-hero {
  position: relative;
  height: clamp(132px, 24vw, 248px);
  margin-bottom: clamp(26px, 4vw, 42px);
  border: 2px solid var(--c-grass);
  border-radius: var(--r-c);
  overflow: hidden;
  background: var(--c-grass);
}
.page-about .tl-hero img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.58;
}
.page-about .tl-hero__veil {
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(14, 59, 58, 0.92) 0%, rgba(14, 59, 58, 0.42) 56%, rgba(201, 138, 46, 0.30) 100%);
}
.page-about .tl-hero__note {
  position: absolute;
  left: clamp(16px, 3vw, 34px);
  right: clamp(16px, 3vw, 34px);
  bottom: clamp(14px, 2.4vw, 28px);
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(15px, 1.9vw, 22px);
  line-height: 1.5;
  color: var(--c-cream);
  text-shadow: 0 1px 12px rgba(14, 59, 58, 0.7);
}

.page-about .tl-scroll {
  overflow-x: auto;
  overflow-y: hidden;
  padding: 22px 0 20px;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--c-mist) rgba(239, 230, 214, 0.6);
  -webkit-overflow-scrolling: touch;
}
.page-about .tl-scroll:focus-visible {
  outline: 3px solid var(--c-gold);
  outline-offset: 4px;
  border-radius: 10px;
}
.page-about .tl-scroll::-webkit-scrollbar {
  height: 9px;
}
.page-about .tl-scroll::-webkit-scrollbar-track {
  background: rgba(239, 230, 214, 0.85);
  border-radius: 99px;
}
.page-about .tl-scroll::-webkit-scrollbar-thumb {
  background: var(--c-mist);
  border-radius: 99px;
}

.page-about .tl-track {
  display: flex;
  gap: var(--ab-gap);
  margin: 0;
  padding: 0 2px;
  list-style: none;
}
.page-about .tl-stage {
  position: relative;
  flex: 0 0 clamp(236px, 25vw, 302px);
  scroll-snap-align: start;
  padding: 30px 22px 22px;
  border: 2px solid var(--ab-line);
  border-radius: var(--r-a);
  background: var(--c-cream);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}
.page-about .tl-stage::before {
  content: "";
  position: absolute;
  top: 1px;
  left: 0;
  width: calc(100% + var(--ab-gap) + 4px);
  height: 2px;
  background-image: repeating-linear-gradient(90deg, var(--c-mist) 0 10px, transparent 10px 20px);
  opacity: 0.75;
  z-index: 0;
}
.page-about .tl-stage:last-child::before {
  display: none;
}
.page-about .tl-stage:nth-child(1) { padding-top: 30px; }
.page-about .tl-stage:nth-child(2) { padding-top: 38px; }
.page-about .tl-stage:nth-child(3) { padding-top: 46px; }
.page-about .tl-stage:nth-child(4) { padding-top: 54px; }
.page-about .tl-stage:nth-child(5) { padding-top: 62px; }
.page-about .tl-stage:last-child {
  border-color: var(--c-gold);
  background-image: linear-gradient(168deg, #FFFFFF 0%, var(--c-gold-soft) 140%);
}
@media (hover: hover) {
  .page-about .tl-stage:hover {
    transform: translateY(-2px);
    border-color: var(--c-gold);
    box-shadow: var(--shadow-lift);
  }
}
.page-about .tl-node {
  position: absolute;
  top: -16px;
  left: 20px;
  z-index: 2;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--c-clay);
  color: var(--c-cream);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.04em;
}
.page-about .tl-era {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--c-moss);
}
.page-about .tl-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-22);
  line-height: 1.38;
  color: var(--c-ink);
}
.page-about .tl-body {
  margin: 0 0 16px;
  font-size: var(--fs-17);
  line-height: 1.8;
}
.page-about .tl-gain {
  margin: 0;
  padding: 12px 14px;
  border-left: 3px solid var(--c-gold);
  border-radius: 4px 14px 14px 4px;
  background: var(--c-sand);
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--c-ink);
}
.page-about .tl-gain span {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--c-clay);
}
.page-about .tl-svg {
  display: block;
  width: 100%;
  height: 34px;
  margin-top: 6px;
  opacity: 0.7;
}
.page-about .tl-hint {
  margin: 6px 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--c-mist);
}
.page-about .tl-hint a {
  color: var(--c-moss);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-about .tl-hint a:hover {
  color: var(--c-clay);
}

/* ---------- 编号说明 ---------- */
.page-about .nb-grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}
@media (min-width: 760px) {
  .page-about .nb-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    align-items: start;
  }
  .page-about .nb-card--1 { grid-column: span 2; }
  .page-about .nb-card--2 { grid-column: span 2; margin-top: 30px; }
  .page-about .nb-card--3 { grid-column: span 2; }
}
.page-about .nb-card {
  position: relative;
  padding: 26px 22px 20px;
  border: 2px solid var(--ab-line);
  border-radius: var(--r-b);
  background: var(--c-cream);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}
@media (hover: hover) {
  .page-about .nb-card:hover {
    transform: translateY(-2px);
    border-color: var(--c-gold);
  }
}
.page-about .nb-no {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(42px, 6.4vw, 68px);
  line-height: 0.86;
  color: var(--c-gold);
  font-variant-numeric: tabular-nums;
}
.page-about .nb-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-22);
  line-height: 1.36;
  color: var(--c-ink);
}
.page-about .nb-card p {
  margin: 0 0 14px;
  font-size: var(--fs-17);
  line-height: 1.82;
}
.page-about .nb-link {
  margin: 0;
}
.page-about .nb-link a {
  font-size: var(--fs-14);
  font-weight: 600;
  color: var(--c-moss);
  text-decoration: none;
  border-bottom: 2px solid var(--c-gold-soft);
  padding-bottom: 2px;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}
.page-about .nb-link a:hover {
  color: var(--c-clay);
  border-bottom-color: var(--c-gold);
}
.page-about .nb-rule {
  margin-top: clamp(22px, 3.4vw, 34px);
  padding: clamp(20px, 3vw, 32px);
  border-left: 5px solid var(--c-grass);
  border-radius: 6px 22px 6px 22px;
  background: var(--c-sand);
}
.page-about .nb-rule p {
  margin: 0 0 12px;
  max-width: 74ch;
}
.page-about .nb-rule p:last-child {
  margin-bottom: 0;
}
.page-about .nb-rule__lead {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-22);
  line-height: 1.5;
  color: var(--c-ink);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
}
@media (min-width: 900px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}
.page-about .team-text > p {
  margin: 0 0 16px;
  max-width: 64ch;
}
.page-about .team-steps {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
.page-about .team-steps li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--ab-line);
}
.page-about .team-steps li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-about .step-no {
  font-family: var(--font-mono);
  font-size: var(--fs-22);
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-gold);
  font-variant-numeric: tabular-nums;
}
.page-about .team-steps h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-22);
  line-height: 1.36;
  color: var(--c-ink);
}
.page-about .team-steps p {
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.8;
}
.page-about .about-figure {
  margin: 0;
}
.page-about .about-figure > img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 16px 5px 16px 5px;
}
.page-about .about-figure--team > img {
  aspect-ratio: 4 / 3;
}

/* ---------- 覆盖范围 ---------- */
.page-about .reach-grid {
  display: grid;
  gap: clamp(24px, 4vw, 46px);
}
@media (min-width: 900px) {
  .page-about .reach-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    align-items: center;
  }
}
.page-about .about-figure--reach > img {
  aspect-ratio: 14 / 9;
}
.page-about .reach-text p {
  margin: 0 0 16px;
  max-width: 62ch;
}
.page-about .reach-text a {
  color: var(--c-moss);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-about .reach-text a:hover {
  color: var(--c-clay);
}
.page-about .reach-stats {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
@media (min-width: 560px) {
  .page-about .reach-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.page-about .reach-stats li {
  padding-top: 12px;
  border-top: 3px solid var(--c-gold);
}
.page-about .stat-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 4.6vw, 52px);
  line-height: 1;
  color: var(--c-grass);
  font-variant-numeric: tabular-nums;
}
.page-about .stat-label {
  display: block;
  margin-top: 10px;
  font-size: var(--fs-14);
  line-height: 1.72;
  color: var(--c-stone);
}

/* ---------- 接下来 ---------- */
.page-about .next-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.4vw, 22px);
  counter-reset: nstep;
}
@media (min-width: 820px) {
  .page-about .next-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
.page-about .next-list li {
  position: relative;
  padding: 30px 22px 24px;
  border: 2px dashed var(--ab-line);
  border-radius: var(--r-b);
  background: var(--c-sand);
  transition: border-color 180ms var(--ease);
}
.page-about .next-list li:hover {
  border-color: var(--c-gold);
}
.page-about .next-list li::before {
  counter-increment: nstep;
  content: counter(nstep, decimal-leading-zero);
  position: absolute;
  top: 12px;
  right: 18px;
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--c-clay);
  letter-spacing: 0.08em;
}
.page-about .next-list h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-22);
  line-height: 1.38;
  color: var(--c-ink);
}
.page-about .next-list p {
  margin: 0;
  font-size: var(--fs-17);
  line-height: 1.8;
}

/* ---------- 结尾跳转 ---------- */
.page-about .about-cta {
  margin-top: clamp(48px, 7vw, 88px);
  padding-top: clamp(30px, 4.6vw, 52px);
  padding-bottom: clamp(30px, 4.6vw, 52px);
  background: var(--c-grass);
  border-radius: 24px 6px 24px 6px;
  color: var(--t-on-dark);
}
.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(23px, 3.2vw, 34px);
  line-height: 1.34;
  color: var(--c-cream);
}
.page-about .about-cta p {
  margin: 12px 0 0;
  max-width: 58ch;
  color: var(--t-on-dark);
}
.page-about .about-cta__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.page-about .about-ghost {
  display: inline-block;
  padding: 11px 22px;
  border: 2px solid var(--c-gold-soft);
  border-radius: 999px;
  background: transparent;
  color: var(--c-gold-soft);
  font-size: var(--fs-14);
  font-weight: 600;
  line-height: 1.4;
  text-decoration: none;
  transition: background-color 180ms var(--ease), color 180ms var(--ease), border-color 180ms var(--ease);
}
.page-about .about-ghost:hover {
  background: var(--c-gold-soft);
  border-color: var(--c-gold-soft);
  color: var(--c-ink);
}
.page-about .about-ghost--dark {
  border-color: var(--c-moss);
  color: var(--c-moss);
}
.page-about .about-ghost--dark:hover {
  background: var(--c-moss);
  border-color: var(--c-moss);
  color: var(--c-cream);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-stage,
  .page-about .nb-card,
  .page-about .next-list li,
  .page-about .about-ghost,
  .page-about .hero-index__list a {
    transition: none;
  }
  .page-about .tl-stage:hover,
  .page-about .nb-card:hover {
    transform: none;
  }
}
<<<END>>>