.page-about {
  background: var(--ink);
  color: var(--paper);
  --about-soft-gold: rgba(200, 169, 106, .22);
  --about-ink-line: rgba(11, 11, 12, .18);
}

.page-about section[id] {
  scroll-margin-top: 96px;
}

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

.page-about .prose {
  max-width: 66ch;
  color: var(--paper);
  line-height: 1.85;
}

.page-about h2 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.18;
  font-size: clamp(26px, 3.6vw, 40px);
  margin: 8px 0 16px;
}

.page-about h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.4;
  margin: 0 0 8px;
}

.page-about .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-about .section--cream {
  background: var(--cream);
  color: var(--ink);
  padding-block: clamp(52px, 7vw, 92px);
}

.page-about .section--cream h2,
.page-about .section--cream h3 {
  color: var(--ink);
}

.page-about .section--cream .prose {
  color: rgba(11, 11, 12, .84);
}

.page-about .section--cream .eyebrow {
  color: var(--green);
}

/* ---------- 首屏 ---------- */
.about-hero {
  padding-block: clamp(24px, 3.4vw, 44px) clamp(44px, 6vw, 80px);
  background:
    radial-gradient(760px 360px at 82% 6%, rgba(200, 169, 106, .16), transparent 72%),
    var(--ink);
  border-bottom: 1px solid var(--rule);
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0 0 clamp(24px, 4vw, 44px);
  padding: 0;
  font-size: 12px;
  letter-spacing: .06em;
}

.page-about .breadcrumb__link,
.page-about .breadcrumb__current,
.page-about .breadcrumb__sep {
  color: var(--mute);
  text-decoration: none;
}

.page-about .breadcrumb__link:hover {
  color: var(--gold-bright);
}

.page-about .breadcrumb__current {
  color: var(--gold);
}

.about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
}

.about-hero__text h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 6.4vw, 68px);
  line-height: 1.08;
  letter-spacing: -.03em;
  margin: 12px 0 20px;
  max-width: 15em;
}

.about-hero__lede {
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.8;
  color: var(--paper);
  max-width: 42em;
  margin: 0 0 24px;
}

.about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  list-style: none;
  margin: 0 0 28px;
  padding: 14px 0 0;
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .07em;
  color: var(--gold);
}

.about-hero__facts li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.about-hero__facts li + li::before {
  content: "";
  width: 4px;
  height: 4px;
  background: var(--gold);
  transform: rotate(45deg);
  flex: none;
}

.about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
}

.about-hero__figure {
  margin: 0;
  align-self: stretch;
}

.about-hero__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  border: 1px solid var(--about-soft-gold);
}

.about-hero__figure figcaption {
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--mute);
}

.about-jump {
  margin-top: clamp(32px, 5vw, 56px);
  padding-top: 16px;
  border-top: 1px solid var(--rule);
}

.about-jump__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.about-jump__list a {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--mute);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.about-jump__list a:hover,
.about-jump__list a:focus-visible {
  color: var(--gold-bright);
  border-bottom-color: var(--gold-bright);
}

/* ---------- 起点 ---------- */
.about-start {
  padding-block: clamp(52px, 7vw, 96px);
}

.about-start__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
}

.about-start__marker {
  display: flex;
  align-items: center;
  gap: 16px;
}

.about-start__year {
  font-family: var(--font-mono);
  font-size: clamp(46px, 8vw, 96px);
  line-height: .9;
  letter-spacing: -.04em;
  color: rgba(200, 169, 106, .18);
  -webkit-text-stroke: 1px var(--gold);
}

.about-start__tick {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), transparent);
}

.about-start__body .prose + .prose {
  margin-top: 18px;
}

.about-quote {
  position: relative;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: clamp(20px, 3vw, 30px) clamp(20px, 3vw, 34px);
  background: linear-gradient(120deg, rgba(200, 169, 106, .15), rgba(200, 169, 106, .03));
  border-left: 2px solid var(--gold);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.about-quote p {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.62;
  color: var(--paper);
}

/* ---------- 服务对象 ---------- */
.about-audience__lede {
  max-width: 60ch;
  margin: 0 0 clamp(24px, 3.6vw, 40px);
  color: rgba(11, 11, 12, .76);
  line-height: 1.8;
}

.about-audience {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-ink-line);
}

.about-audience__item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--about-ink-line);
}

.about-audience__num {
  font-size: 13px;
  color: var(--red);
  letter-spacing: .08em;
  padding-top: 4px;
}

.about-audience__text h3 {
  margin: 0 0 6px;
}

.about-audience__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(11, 11, 12, .76);
}

/* ---------- 功能分区 ---------- */
.about-zones {
  padding-block: clamp(52px, 7vw, 96px);
  border-top: 1px solid var(--rule);
}

.about-zones__head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.about-zones__lede {
  margin: 0;
  color: var(--mute);
  line-height: 1.8;
}

.about-zones__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.about-zones__item {
  background: var(--char);
  padding: clamp(20px, 3vw, 30px);
  transition: background var(--dur) var(--ease);
}

.about-zones__item:hover {
  background: #191919;
}

.about-zones__num {
  display: block;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
  margin-bottom: 10px;
}

.about-zones__item h3 {
  color: var(--paper);
}

.about-zones__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mute);
}

/* ---------- 团队 ---------- */
.about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
}

.about-team__lede {
  margin: 0 0 clamp(20px, 3vw, 30px);
  color: rgba(11, 11, 12, .78);
  line-height: 1.8;
}

.about-team__figure {
  margin: 0;
}

.org-svg {
  display: block;
  width: 100%;
  height: auto;
}

.org-line,
.org-stem {
  stroke: var(--about-ink-line);
  stroke-width: 1;
}

.org-dot {
  fill: var(--cream);
  stroke: var(--gold);
  stroke-width: 2;
  transition: fill var(--dur) var(--ease), stroke var(--dur) var(--ease);
}

.org-label {
  fill: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 600;
}

.org-sub {
  fill: rgba(11, 11, 12, .5);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
}

.org-node {
  transition: opacity var(--dur) var(--ease);
}

.org-svg:hover .org-node {
  opacity: .55;
}

.org-svg .org-node:hover {
  opacity: 1;
}

.org-node:hover .org-dot {
  fill: var(--gold);
  stroke: var(--ink);
}

.about-team__figure figcaption {
  margin-top: 14px;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(11, 11, 12, .58);
}

.about-team__groups {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--about-ink-line);
}

.about-group {
  padding: 20px 0;
  border-bottom: 1px solid var(--about-ink-line);
}

.about-group p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(11, 11, 12, .76);
}

/* ---------- 版本节点 ---------- */
.about-versions {
  padding-block: clamp(52px, 7vw, 96px);
  border-top: 1px solid var(--rule);
  background:
    linear-gradient(180deg, rgba(31, 58, 50, .28), transparent 42%),
    var(--ink);
}

.about-versions__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 44px);
}

.about-versions__rail {
  display: none;
}

.about-scale {
  list-style: none;
  margin: 0;
  padding: 0 0 0 20px;
  position: relative;
}

.about-scale::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(200, 169, 106, .12));
}

.about-scale__tick {
  position: relative;
  padding: 10px 0;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--mute);
}

.about-scale__tick::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 50%;
  width: 10px;
  height: 1px;
  background: var(--gold);
}

.about-scale__tick::after {
  content: "";
  position: absolute;
  left: -21px;
  top: calc(50% - 2px);
  width: 5px;
  height: 5px;
  background: var(--ink);
  border: 1px solid var(--gold);
  transform: rotate(45deg);
}

.about-versions__lede {
  margin: 0 0 clamp(22px, 3vw, 34px);
  color: var(--mute);
  line-height: 1.8;
  max-width: 56ch;
}

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.page-about .filter-btn {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  padding: 7px 14px;
  border: 1px solid var(--rule);
  background: transparent;
  color: var(--mute);
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .filter-btn:hover,
.page-about .filter-btn:focus-visible {
  color: var(--gold-bright);
  border-color: var(--gold);
}

.page-about .filter-btn[aria-pressed="true"] {
  color: var(--ink);
  background: var(--gold);
  border-color: var(--gold);
}

.page-about .filter-status {
  display: block;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mute);
  margin: 0 0 clamp(18px, 2.6vw, 28px);
}

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

.about-versions__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: clamp(18px, 2.4vw, 26px) 0;
  border-top: 1px solid var(--rule);
  transition: opacity var(--dur) var(--ease);
}

.about-versions__item[hidden],
.about-versions__item.is-hidden,
.about-versions__item[aria-hidden="true"] {
  display: none;
}

.about-versions__year {
  display: block;
  font-size: 15px;
  letter-spacing: .1em;
  color: var(--gold);
}

.about-versions__item h3 {
  color: var(--paper);
}

.about-versions__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mute);
  max-width: 60ch;
}

.about-versions__media {
  margin: clamp(26px, 4vw, 40px) 0 0;
}

.about-versions__media img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  border: 1px solid var(--about-soft-gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
}

.about-versions__media figcaption {
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--mute);
}

/* ---------- 协作与复核 ---------- */
.about-eco__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
}

.about-eco__body .prose + .prose {
  margin-top: 16px;
}

.about-eco__points {
  list-style: none;
  margin: clamp(22px, 3.4vw, 34px) 0 0;
  padding: 0;
  border-top: 1px solid var(--about-ink-line);
}

.about-eco__points li {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--about-ink-line);
}

.about-eco__num {
  font-size: 24px;
  line-height: 1;
  color: var(--red);
  letter-spacing: -.02em;
}

.about-eco__cap {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(11, 11, 12, .78);
}

.about-eco__figure {
  margin: 0;
}

.about-eco__figure img {
  display: block;
  width: 100%;
  aspect-ratio: 5 / 6;
  object-fit: cover;
  border: 1px solid rgba(11, 11, 12, .16);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.about-eco__figure figcaption {
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(11, 11, 12, .6);
}

/* ---------- 服务节奏 ---------- */
.about-cadence {
  padding-block: clamp(52px, 7vw, 96px);
  border-top: 1px solid var(--rule);
}

.about-cadence__lede {
  margin: 0 0 clamp(26px, 4vw, 40px);
  color: var(--mute);
  line-height: 1.8;
  max-width: 56ch;
}

.about-cadence__stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.about-cadence__cell {
  background: var(--ink);
  padding: clamp(18px, 2.6vw, 26px);
}

.about-cadence__num {
  margin: 0 0 8px;
  font-size: clamp(20px, 2.6vw, 26px);
  letter-spacing: -.01em;
  color: var(--gold);
}

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

.about-cadence__note {
  margin: clamp(24px, 3.6vw, 36px) 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper);
  padding-left: 18px;
  border-left: 2px solid var(--gold);
}

.about-cadence__links {
  margin: clamp(20px, 3vw, 28px) 0 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--mute);
}

.about-cadence__links a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--about-soft-gold);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.about-cadence__links a:hover,
.about-cadence__links a:focus-visible {
  color: var(--gold-bright);
  border-bottom-color: var(--gold-bright);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .about-team__groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(20px, 3vw, 34px);
  }

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

@media (min-width: 860px) {
  .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .about-start__grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    align-items: start;
    column-gap: clamp(24px, 4vw, 56px);
  }

  .about-start__marker {
    position: sticky;
    top: 104px;
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }

  .about-start__tick {
    width: 1px;
    height: clamp(120px, 22vh, 220px);
    flex: none;
    background: linear-gradient(180deg, var(--gold), rgba(200, 169, 106, .08));
  }

  .about-audience__item {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 20px;
    padding: 22px 0;
  }

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

  .about-zones__item--wide {
    grid-column: 1 / -1;
  }

  .about-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .about-versions__grid {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: start;
    column-gap: clamp(26px, 4vw, 56px);
  }

  .about-versions__rail {
    display: block;
    position: sticky;
    top: 108px;
    align-self: start;
  }

  .about-versions__item {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }

  .about-versions__year {
    text-align: left;
  }

  .about-eco__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

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

@media (min-width: 1080px) {
  .about-hero__figure img {
    aspect-ratio: 3 / 2;
  }

  .about-audience__item {
    grid-template-columns: 72px minmax(0, 1fr);
    column-gap: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 1ms !important;
  }
}
<<<END>>>