.page-about {
  --about-pad: clamp(48px, 8vw, 104px);
  --about-mono: var(--font-mono);
  --about-orange-deep: #A5340F;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--fs-16);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about .about-wrap {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: clamp(16px, 5vw, 40px);
}

.page-about section {
  position: relative;
  padding-block: var(--about-pad);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  margin: 0;
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.01em;
}

.page-about h2 {
  font-size: clamp(24px, 3.6vw, 40px);
  margin-bottom: 14px;
}

.page-about h3 {
  font-size: clamp(19px, 2.2vw, 26px);
  margin-bottom: 10px;
}

.page-about p {
  margin: 0 0 14px;
}

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

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--about-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--fox-orange);
}

.page-about .about-kicker::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

.page-about .about-kicker--dark {
  color: var(--about-orange-deep);
}

.page-about .about-lede {
  max-width: 62ch;
  margin-bottom: 18px;
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--gray-blue);
}

.page-about .about-head {
  max-width: 70ch;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-more {
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-link {
  display: inline-block;
  padding-bottom: 3px;
  font-size: var(--fs-14);
  font-weight: 700;
  color: var(--amber);
  text-decoration: none;
  border-bottom: 2px solid var(--fox-orange);
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--fox-orange);
  border-bottom-width: 3px;
}

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

/* 封面 */
.page-about .about-cover {
  padding-block: clamp(26px, 4vw, 44px) clamp(44px, 7vw, 88px);
  border-bottom: var(--hair-strong);
  background:
    radial-gradient(120% 90% at 88% 4%, rgba(240, 78, 35, 0.24), transparent 60%),
    radial-gradient(90% 80% at 4% 100%, rgba(43, 42, 94, 0.6), transparent 68%),
    var(--ink);
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(26px, 4vw, 44px);
  padding: 0;
  list-style: none;
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--gray-blue);
}

.page-about .breadcrumb__link {
  color: var(--gray-blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(143, 163, 184, 0.35);
}

.page-about .breadcrumb__link:hover {
  color: var(--amber);
  border-color: var(--amber);
}

.page-about .breadcrumb__sep {
  color: rgba(143, 163, 184, 0.5);
}

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

.page-about .about-cover__title {
  max-width: 18ch;
  margin-bottom: 20px;
  font-size: clamp(30px, 6.4vw, 60px);
}

.page-about .about-cover__lede {
  max-width: 58ch;
  font-size: clamp(16px, 1.7vw, 19px);
  color: var(--gray-blue);
}

.page-about .about-cover__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--hair-strong);
  border-left: var(--hair-strong);
}

.page-about .about-cover__fact {
  padding: 16px 14px 18px;
  border-right: var(--hair-strong);
  border-bottom: var(--hair-strong);
}

.page-about .about-num {
  display: block;
  font-family: var(--about-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(23px, 3.2vw, 34px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--amber);
}

.page-about .about-fact-label {
  display: block;
  margin-top: 6px;
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--gray-blue);
}

/* 沿革轨道 */
.page-about .about-band--indigo {
  padding-top: calc(var(--about-pad) + 22px);
  background: var(--indigo);
}

.page-about .about-band--indigo::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 52px;
  background: linear-gradient(176deg, var(--ink) 0 46%, transparent 46%);
  pointer-events: none;
}

.page-about .about-track {
  display: grid;
  gap: 30px;
  margin-top: clamp(26px, 4vw, 44px);
}

.page-about .about-track__rail {
  position: relative;
  display: flex;
  flex-direction: column;
  padding-left: 30px;
}

.page-about .about-track__rail::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(47, 243, 214, 0.08));
}

.page-about .about-track__node {
  position: relative;
  display: block;
  padding: 10px 0;
  color: var(--text);
  text-decoration: none;
}

.page-about .about-track__dot {
  position: absolute;
  left: -26px;
  top: 17px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1px solid var(--cyan);
  background: var(--indigo);
  transition: background 160ms var(--ease), box-shadow 160ms var(--ease);
}

.page-about .about-track__node:hover .about-track__dot,
.page-about .about-track__node:focus-visible .about-track__dot {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(47, 243, 214, 0.18);
}

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

.page-about .about-track__year {
  display: block;
  font-family: var(--about-mono);
  font-size: var(--fs-14);
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .about-track__note {
  display: block;
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--gray-blue);
}

.page-about .about-stage {
  padding-block: clamp(22px, 3vw, 34px);
  border-top: 1px solid rgba(201, 195, 184, 0.18);
  scroll-margin-top: 96px;
}

.page-about .about-stage:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-stage__tag {
  margin-bottom: 10px;
  font-family: var(--about-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-stage p {
  max-width: 62ch;
  color: rgba(231, 225, 214, 0.88);
}

/* 通用图框 */
.page-about .about-figure {
  max-width: 100%;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 8px;
  border: var(--hair-strong);
  background: rgba(18, 16, 20, 0.55);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.94) contrast(1.06);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--gray-blue);
}

.page-about .about-figure--square {
  max-width: 420px;
  margin-top: clamp(24px, 4vw, 40px);
}

/* 能力 */
.page-about .about-services {
  display: grid;
  gap: 16px;
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-service {
  padding: 22px 20px 24px;
  background: var(--ink-2);
  border: var(--hair-strong);
  box-shadow: 6px 6px 0 rgba(201, 195, 184, 0.1);
}

.page-about .about-service h3 {
  color: var(--text);
}

.page-about .about-service p {
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--gray-blue);
}

.page-about .about-service__idx {
  margin-bottom: 10px;
  font-family: var(--about-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--fox-orange);
}

/* 校验 */
.page-about .about-check-band {
  background: linear-gradient(165deg, var(--teal), #092726 72%);
}

.page-about .about-check {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .about-check__intro p {
  max-width: 58ch;
  color: rgba(231, 225, 214, 0.88);
}

.page-about .about-seg {
  padding: 18px 16px 20px;
  border: 1px solid rgba(47, 243, 214, 0.28);
  background: rgba(9, 39, 38, 0.62);
}

.page-about .segmented__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  position: relative;
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}

.page-about .segmented__tab {
  appearance: none;
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  padding: 8px 12px;
  font: inherit;
  font-size: var(--fs-14);
  color: var(--gray-blue);
  cursor: pointer;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .segmented__tab[aria-selected="true"] {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .segmented__tab:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .about-panel {
  font-size: var(--fs-14);
  color: rgba(231, 225, 214, 0.88);
}

/* 团队 */
.page-about .about-team {
  display: grid;
  gap: clamp(20px, 4vw, 40px);
}

.page-about .about-team__figure {
  margin-top: 0;
}

.page-about .about-roles {
  display: grid;
  gap: 14px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .about-role {
  padding: 20px 18px;
  background: var(--paper);
  color: var(--on-paper);
  border: 1px solid rgba(26, 26, 26, 0.2);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.5);
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-about .about-role__name {
  display: inline-block;
  margin-bottom: 10px;
  padding-bottom: 3px;
  font-size: var(--fs-16);
  font-weight: 900;
  letter-spacing: 0.02em;
  border-bottom: 3px solid var(--fox-orange);
}

.page-about .about-role__duty {
  font-size: var(--fs-14);
  line-height: 1.75;
  color: #33302a;
}

.page-about .about-role__more {
  margin-top: 10px;
  padding-top: 10px;
  font-size: var(--fs-12);
  line-height: 1.7;
  color: #6a655c;
  border-top: 1px dashed rgba(26, 26, 26, 0.25);
}

@media (hover: hover) {
  .page-about .about-role:hover {
    transform: translateY(-5px);
    box-shadow: 7px 10px 0 rgba(0, 0, 0, 0.55);
  }
}

/* 资料库（米白画册页） */
.page-about .about-ledger {
  background: var(--paper);
  color: var(--on-paper);
}

.page-about .about-ledger h2 {
  color: var(--on-paper);
}

.page-about .about-ledger .about-lede {
  color: #4a463d;
}

.page-about .about-quote {
  max-width: 46ch;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 12px 0 12px 20px;
  border-left: 3px solid var(--fox-orange);
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 700;
  line-height: 1.6;
  color: #1a1a1a;
}

.page-about .about-ledger__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 40px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: clamp(18px, 3vw, 24px) 0 0;
  list-style: none;
  border-top: 1px solid rgba(26, 26, 26, 0.2);
}

.page-about .about-ledger__num {
  display: block;
  font-family: var(--about-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.15;
  color: var(--about-orange-deep);
}

.page-about .about-ledger .about-fact-label {
  color: #5a554b;
}

/* 内容体系 */
.page-about .about-editorial {
  background: var(--ink-3);
}

.page-about .about-editorial__list {
  display: grid;
  gap: 1px;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  list-style: none;
  background: rgba(201, 195, 184, 0.18);
  border: 1px solid rgba(201, 195, 184, 0.18);
}

.page-about .about-editorial__list li {
  padding: 18px 18px 20px;
  background: var(--ink-3);
}

.page-about .about-label {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--about-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--amber);
}

.page-about .about-editorial__list p {
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--gray-blue);
}

/* 合作 */
.page-about .about-partners__grid {
  display: grid;
  gap: 18px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .about-partner {
  padding-top: 16px;
  border-top: 2px solid var(--fox-orange);
}

.page-about .about-partner h3 {
  font-size: var(--fs-20);
  margin-bottom: 8px;
}

.page-about .about-partner p {
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--gray-blue);
}

/* 联系 */
.page-about .about-contact-band {
  background: linear-gradient(160deg, var(--wine), #3a1019 78%);
}

.page-about .about-contact {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-contact__note {
  max-width: 56ch;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: rgba(244, 239, 230, 0.78);
}

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

.page-about .about-contact__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-top: 1px solid rgba(244, 239, 230, 0.22);
}

.page-about .about-contact__row dt {
  font-family: var(--about-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .about-contact__row dd {
  margin: 0;
  font-size: var(--fs-16);
  color: #F4EFE6;
  word-break: break-word;
}

.page-about .about-contact__row a {
  color: #F4EFE6;
  text-decoration: none;
  border-bottom: 1px solid rgba(244, 239, 230, 0.42);
}

.page-about .about-contact__row a:hover {
  border-bottom-color: var(--amber);
  color: var(--amber);
}

.page-about .about-contact-band .about-link {
  color: var(--paper);
  border-bottom-color: var(--amber);
}

.page-about .about-contact-band .about-link:hover {
  color: var(--amber);
}

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

@media (min-width: 780px) {
  .page-about .about-services {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

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

  .page-about .about-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-track {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 56px;
  }

  .page-about .about-track__rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .about-check {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.78fr);
    align-items: start;
  }

  .page-about .about-contact {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .about-cover__title {
    max-width: 20ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-track__dot,
  .page-about .segmented__tab {
    transition: none;
  }

  .page-about .about-role:hover {
    transform: none;
  }
}
<<<END>>>