.page-about {
  --about-rail: 44px;
  --about-pad: clamp(56px, 8vw, 112px);
  --about-line: rgba(124, 140, 153, 0.32);
  --about-ink-soft: rgba(12, 18, 24, 0.78);
  --about-paper-soft: rgba(251, 246, 238, 0.82);
  background: var(--paper);
  color: var(--ink);
  overflow-x: clip;
}

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

.page-about p {
  line-height: 1.75;
}

.page-about h2 {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(26px, 4.6vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 0.45em;
}

.page-about figcaption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  margin-top: 10px;
  color: var(--grey);
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  background: var(--ink);
  color: var(--paper);
  padding-block: clamp(18px, 3vw, 30px) clamp(48px, 7vw, 92px);
  border-bottom: 2px solid var(--sand);
  position: relative;
}

.page-about .about-hero .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  padding: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--grey);
}

.page-about .about-hero .breadcrumb__list a {
  color: var(--sand);
  text-decoration: none;
}

.page-about .about-hero .breadcrumb__list a:hover {
  color: var(--mint);
}

.page-about .about-hero .breadcrumb__list li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(124, 140, 153, 0.6);
}

.page-about .about-frame {
  position: relative;
  border: 2px solid rgba(227, 192, 138, 0.55);
  padding: clamp(18px, 3vw, 36px);
  background:
    linear-gradient(180deg, rgba(22, 33, 43, 0.72), rgba(12, 18, 24, 0.24));
}

.page-about .about-frame::before {
  content: "";
  position: absolute;
  inset: -2px -2px auto -2px;
  height: 9px;
  background: repeating-linear-gradient(
    90deg,
    rgba(227, 192, 138, 0.75) 0 1px,
    transparent 1px 13px
  );
  pointer-events: none;
}

.page-about .about-frame::after {
  content: "";
  position: absolute;
  left: -2px;
  top: -2px;
  width: 34px;
  height: 34px;
  border-left: 4px solid var(--red);
  border-top: 4px solid var(--red);
  pointer-events: none;
}

.page-about .about-frame__grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-about .about-frame__lead h1 {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(34px, 7.2vw, 82px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  margin: 0.14em 0 0.34em;
  color: var(--paper);
  padding-right: 0.06em;
}

.page-about .about-frame__deck {
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--about-paper-soft);
  max-width: 46ch;
  margin: 0 0 clamp(20px, 3vw, 30px);
}

.page-about .about-facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: clamp(14px, 3vw, 30px);
  margin: 0 0 clamp(22px, 3.2vw, 34px);
  padding: 0;
}

.page-about .about-facts li {
  border-left: 3px solid var(--red);
  padding-left: 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .about-facts__n {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--mint);
  letter-spacing: 0.02em;
}

.page-about .about-facts__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--grey);
}

.page-about .about-frame__cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

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

.page-about .about-frame__fig img {
  width: 100%;
  object-fit: cover;
  border: 2px solid var(--sand);
  box-shadow: var(--hard);
}

.page-about .about-frame__fig figcaption {
  color: var(--grey);
}

/* ---------- 起点自述 ---------- */
.page-about .about-origin {
  background: var(--sand-light);
  color: var(--ink);
  padding-block: var(--about-pad);
  border-bottom: 2px solid rgba(12, 18, 24, 0.14);
}

.page-about .about-origin__grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-origin__note {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--red);
  margin: 0;
  padding-bottom: 10px;
  border-bottom: 2px solid rgba(166, 58, 40, 0.35);
}

.page-about .about-origin__quote {
  margin: 0;
  border-left: 4px solid var(--red);
  padding-left: clamp(16px, 3vw, 30px);
}

.page-about .about-origin__quote p {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--about-ink-soft);
  margin: 0 0 1em;
}

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

.page-about .about-origin__quote strong {
  color: var(--ink);
  font-weight: 900;
  background: linear-gradient(transparent 62%, rgba(53, 240, 192, 0.5) 62%);
}

.page-about .about-origin__side {
  border: 2px solid var(--ink);
  padding: clamp(16px, 2.6vw, 26px);
  background: var(--paper);
  box-shadow: 6px 6px 0 rgba(122, 36, 24, 0.85);
}

.page-about .about-origin__side-title {
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0.04em;
  margin: 0 0 0.6em;
  color: var(--ink);
}

.page-about .about-origin__side p {
  font-size: 15px;
  color: var(--about-ink-soft);
  margin: 0 0 1em;
}

.page-about .about-origin__link,
.page-about .about-team__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--red-deep);
  text-decoration: none;
  border-bottom: 2px solid var(--red);
  padding-bottom: 2px;
}

.page-about .about-origin__link:hover,
.page-about .about-team__link:hover {
  color: var(--ink);
  border-color: var(--ink);
}

/* ---------- 章节标题 ---------- */
.page-about .about-sec-head {
  max-width: 46ch;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-sec-head--tight {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-sec-head__sub {
  font-size: clamp(15px, 1.6vw, 17px);
  color: rgba(12, 18, 24, 0.7);
  margin: 0;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  background: var(--sand);
  color: var(--ink);
  padding-block: var(--about-pad);
  border-bottom: 2px solid var(--ink);
}

.page-about .about-timeline .eyebrow {
  color: var(--red-deep);
}

.page-about .about-timeline__fig {
  margin: 0 0 clamp(30px, 5vw, 54px);
}

.page-about .about-timeline__fig img {
  width: 100%;
  object-fit: cover;
  border: 2px solid var(--ink);
  box-shadow: 6px 6px 0 rgba(12, 18, 24, 0.28);
}

.page-about .about-timeline__fig figcaption {
  color: rgba(12, 18, 24, 0.6);
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--red-deep), rgba(122, 36, 24, 0.12));
}

.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: var(--about-rail) minmax(0, 1fr);
  column-gap: clamp(10px, 2vw, 26px);
  padding-block: clamp(16px, 2.4vw, 26px);
}

.page-about .tl-node {
  position: absolute;
  left: 4px;
  top: calc(clamp(16px, 2.4vw, 26px) + 8px);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--sand);
  border: 3px solid var(--red-deep);
  box-sizing: border-box;
}

.page-about .tl-body {
  grid-column: 2;
  min-width: 0;
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--red-deep);
  margin: 0 0 0.3em;
  line-height: 1;
}

.page-about .tl-body h3 {
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 900;
  letter-spacing: -0.01em;
  margin: 0 0 0.5em;
  color: var(--ink);
}

.page-about .tl-body p {
  font-size: clamp(15px, 1.5vw, 17px);
  color: rgba(12, 18, 24, 0.8);
  margin: 0;
  max-width: 62ch;
}

/* ---------- 分区方法 ---------- */
.page-about .about-zones {
  background: var(--sand-light);
  color: var(--ink);
  padding-block: var(--about-pad);
  border-bottom: 2px solid var(--ink);
}

.page-about .about-zones__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .about-zones__lead p {
  font-size: clamp(15px, 1.6vw, 17px);
  color: var(--about-ink-soft);
  margin: 0 0 1em;
  max-width: 56ch;
}

.page-about .about-zones__fig {
  margin: 0;
  position: relative;
}

.page-about .about-zones__fig img {
  width: 100%;
  object-fit: cover;
  border: 2px solid var(--ink);
  box-shadow: 6px 6px 0 rgba(122, 36, 24, 0.75);
}

.page-about .zone-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--ink);
}

.page-about .zone {
  display: grid;
  grid-template-columns: clamp(54px, 9vw, 86px) minmax(0, 1fr);
  gap: clamp(10px, 2vw, 24px);
  align-items: start;
  padding: clamp(14px, 2vw, 20px) 0;
  border-bottom: 1px solid rgba(12, 18, 24, 0.16);
}

.page-about .zone__no {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--red);
  border-left: 3px solid var(--red);
  padding: 2px 0 2px 8px;
}

.page-about .zone__text h3 {
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 900;
  margin: 0 0 0.32em;
  color: var(--ink);
}

.page-about .zone__text p {
  font-size: 15px;
  color: rgba(12, 18, 24, 0.72);
  margin: 0;
  max-width: 60ch;
}

.page-about .about-zones__note {
  margin: clamp(22px, 3vw, 34px) 0 0;
  font-size: 14px;
  color: rgba(12, 18, 24, 0.72);
  border-left: 4px solid var(--mint);
  padding-left: 14px;
  max-width: 66ch;
}

/* ---------- 控制室 ---------- */
.page-about .about-control {
  background: var(--ink);
  color: var(--paper);
  padding-block: var(--about-pad);
  position: relative;
  border-top: 6px solid var(--red);
}

.page-about .about-control .eyebrow {
  color: var(--sand);
}

.page-about .about-control__head {
  max-width: 52ch;
  margin-bottom: clamp(26px, 4vw, 40px);
}

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

.page-about .about-control__head p {
  font-size: clamp(15px, 1.6vw, 17px);
  color: var(--about-paper-soft);
  margin: 0;
}

.page-about .ctrl-steps {
  list-style: none;
  margin: 0 0 clamp(26px, 4vw, 42px);
  padding: 0;
  display: grid;
  gap: clamp(12px, 2vw, 18px);
}

.page-about .ctrl-step {
  border: 2px solid rgba(227, 192, 138, 0.45);
  background: var(--ink-2);
  box-shadow: 6px 6px 0 rgba(122, 36, 24, 0.6);
}

.page-about .ctrl-step summary {
  display: flex;
  align-items: center;
  gap: 14px;
  list-style: none;
  cursor: pointer;
  padding: clamp(14px, 2vw, 20px) clamp(14px, 2.2vw, 22px);
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 800;
  color: var(--paper);
}

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

.page-about .ctrl-step summary::marker {
  content: "";
}

.page-about .ctrl-step summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--mint);
}

.page-about .ctrl-step[open] summary::after {
  content: "−";
}

.page-about .ctrl-step summary:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: -4px;
}

.page-about .ctrl-step__n {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--mint);
  border: 2px solid rgba(53, 240, 192, 0.5);
  padding: 3px 7px;
}

.page-about .ctrl-step__body {
  padding: 0 clamp(14px, 2.2vw, 22px) clamp(16px, 2.4vw, 22px);
}

.page-about .ctrl-step__body p {
  margin: 0;
  font-size: clamp(15px, 1.6vw, 17px);
  color: var(--about-paper-soft);
  max-width: 68ch;
  border-left: 2px solid rgba(227, 192, 138, 0.35);
  padding-left: 14px;
}

.page-about .ctrl-meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  background: rgba(227, 192, 138, 0.18);
  border: 2px solid rgba(227, 192, 138, 0.35);
}

.page-about .ctrl-meta__cell {
  background: var(--ink);
  padding: clamp(14px, 2vw, 20px);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .ctrl-meta__n {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--mint);
}

.page-about .ctrl-meta__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--grey);
}

/* ---------- 团队与服务地区 ---------- */
.page-about .about-team {
  background: var(--sand);
  color: var(--ink);
  padding-block: var(--about-pad);
  border-bottom: 2px solid var(--ink);
}

.page-about .about-team .eyebrow {
  color: var(--red-deep);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-team__lead p {
  font-size: clamp(15px, 1.6vw, 17px);
  color: rgba(12, 18, 24, 0.78);
  margin: 0 0 clamp(20px, 3vw, 30px);
  max-width: 54ch;
}

.page-about .team-bars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2vw, 18px);
}

.page-about .team-bar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 12px;
  align-items: baseline;
}

.page-about .team-bar__k {
  font-size: 15px;
  font-weight: 800;
  color: var(--ink);
}

.page-about .team-bar__n {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  font-weight: 700;
  color: var(--red-deep);
}

.page-about .team-bar__meter {
  grid-column: 1 / -1;
  display: block;
  height: 8px;
  background: rgba(12, 18, 24, 0.14);
}

.page-about .team-bar__meter i {
  display: block;
  height: 100%;
  background: var(--red);
}

.page-about .team-bar:nth-child(1) .team-bar__meter i { width: 42.3%; }
.page-about .team-bar:nth-child(2) .team-bar__meter i { width: 30.8%; }
.page-about .team-bar:nth-child(3) .team-bar__meter i { width: 19.2%; }
.page-about .team-bar:nth-child(4) .team-bar__meter i { width: 7.7%; }

.page-about .about-team__side {
  border: 2px solid var(--ink);
  background: var(--paper);
  padding: clamp(18px, 2.6vw, 28px);
  box-shadow: 6px 6px 0 rgba(122, 36, 24, 0.85);
}

.page-about .about-team__side-title {
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 900;
  margin: 0 0 0.6em;
  color: var(--ink);
}

.page-about .about-team__side p {
  font-size: 15px;
  color: var(--about-ink-soft);
  margin: 0 0 1em;
}

.page-about .team-stats {
  margin: 0 0 1.2em;
  padding: 0;
  border-top: 2px solid rgba(12, 18, 24, 0.16);
}

.page-about .team-stats__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid rgba(12, 18, 24, 0.12);
}

.page-about .team-stats__row dt {
  font-size: 14px;
  color: rgba(12, 18, 24, 0.7);
}

.page-about .team-stats__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  font-weight: 700;
  color: var(--red-deep);
  text-align: right;
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-partners {
  background: var(--paper);
  color: var(--ink);
  padding-block: var(--about-pad);
  border-bottom: 2px solid var(--ink);
}

.page-about .about-partners .eyebrow {
  color: var(--red);
}

.page-about .partner-rail {
  list-style: none;
  margin: 0;
  padding: 0 0 14px;
  display: flex;
  gap: clamp(12px, 2vw, 20px);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-about .partner-card {
  flex: 0 0 min(272px, 78vw);
  scroll-snap-align: start;
  border: 2px solid var(--ink);
  background: var(--sand-light);
  padding: clamp(16px, 2.4vw, 24px);
  box-shadow: 6px 6px 0 rgba(122, 36, 24, 0.85);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .partner-card__n {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 3.2vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--red);
  letter-spacing: 0.02em;
}

.page-about .partner-card h3 {
  font-size: 16px;
  font-weight: 900;
  margin: 0;
  color: var(--ink);
}

.page-about .partner-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(12, 18, 24, 0.72);
}

/* ---------- 联络收束 ---------- */
.page-about .about-contact {
  background: var(--ink);
  color: var(--paper);
  padding-block: clamp(48px, 7vw, 96px);
}

.page-about .about-contact__box {
  background: var(--red);
  color: var(--paper);
  padding: clamp(24px, 4vw, 46px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), 0 100%);
  box-shadow: 0 0 0 2px rgba(227, 192, 138, 0.5) inset;
}

.page-about .about-contact__box h2 {
  color: var(--paper);
  max-width: 24ch;
}

.page-about .about-contact__box p {
  font-size: clamp(15px, 1.6vw, 17px);
  color: rgba(251, 246, 238, 0.9);
  max-width: 60ch;
  margin: 0 0 clamp(20px, 3vw, 28px);
}

.page-about .about-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-contact__actions .btn {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about {
    --about-rail: 60px;
  }

  .page-about .ctrl-meta {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .timeline::before {
    left: 15px;
  }

  .page-about .tl-node {
    left: 8px;
  }
}

@media (min-width: 860px) {
  .page-about {
    --about-rail: 76px;
  }

  .page-about .about-frame__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .about-frame__fig {
    transform: translateY(24px);
  }

  .page-about .about-origin__grid {
    grid-template-columns: 88px minmax(0, 1fr) 300px;
    align-items: start;
  }

  .page-about .about-zones__grid {
    grid-template-columns: 6fr 4fr;
    align-items: end;
  }

  .page-about .about-team__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .tl-item:nth-child(even) .tl-body {
    margin-left: clamp(0px, 5vw, 64px);
  }

  .page-about .tl-item:nth-child(odd) .tl-body {
    max-width: 60ch;
  }

  .page-about .timeline::before {
    left: 19px;
  }

  .page-about .tl-node {
    left: 12px;
    width: 18px;
    height: 18px;
  }

  .page-about .ctr-step__t {
    letter-spacing: 0.01em;
  }
}

@media (min-width: 1100px) {
  .page-about .about-origin__grid {
    grid-template-columns: 110px minmax(0, 1fr) 320px;
    gap: 40px;
  }

  .page-about .about-frame {
    padding: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-frame__fig {
    transform: none !important;
  }

  .page-about [data-reveal] {
    transition: none !important;
    transform: none !important;
  }
}
<<<END>>>