.page-about {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  overflow-x: clip;
}

.page-about .section {
  padding-block: clamp(56px, 8vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding-block: 22px 4px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--gray);
}
.page-about .crumbs a {
  color: var(--gray);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t) var(--ease), border-color var(--t) var(--ease);
}
.page-about .crumbs a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}
.page-about .crumbs span[aria-current] {
  color: var(--ink);
}

/* ---------- 通用标题与行文 ---------- */
.page-about h1,
.page-about h2,
.page-about h3 {
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.18;
  margin: 0;
}
.page-about h2 {
  font-size: clamp(25px, 3.4vw, 38px);
  max-width: 24em;
}
.page-about h3 {
  font-size: clamp(18px, 2vw, 22px);
}
.page-about p {
  margin: 0;
  line-height: 1.9;
}
.page-about .lede {
  font-size: clamp(16px, 1.5vw, 19px);
  color: #2C3038;
  max-width: 40em;
  margin-top: 18px;
}
.page-about .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--cyan);
  margin: 0 0 16px;
}
.page-about .eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--red);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(28px, 5vw, 56px) clamp(52px, 7vw, 84px);
}
.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
}
.page-about .about-hero h1 {
  font-size: clamp(32px, 6.2vw, 62px);
  line-height: 1.08;
  max-width: 15em;
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.page-about .about-hero__board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 2px solid var(--ink);
  border-left: 1px solid var(--line);
  align-self: end;
}
.page-about .about-cell {
  padding: 20px 16px 22px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background var(--t) var(--ease);
}
.page-about .about-cell:hover {
  background: var(--red-mist);
}
.page-about .about-cell__num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(26px, 5.4vw, 38px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--red);
}
.page-about .about-cell__label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--gray);
}

/* ---------- 团队分工 ---------- */
.page-about .about-roles__lede {
  max-width: 36em;
}
.page-about .about-roles {
  display: grid;
  gap: 30px;
  margin-top: 44px;
}
.page-about .about-role {
  border-top: 3px solid var(--ink);
  padding-top: 20px;
}
.page-about .about-role__no {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gray);
}
.page-about .about-role__name {
  margin-top: 12px;
}
.page-about .about-role__count {
  font-family: var(--mono);
  font-size: 15px;
  color: var(--cyan);
  margin-top: 8px;
  letter-spacing: 0.02em;
}
.page-about .about-role__desc {
  margin-top: 14px;
  font-size: 16px;
  color: #33383F;
  max-width: 34em;
}

.page-about .about-fig {
  margin: 48px 0 0;
}
.page-about .about-fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
}
.page-about .about-fig .figure__caption {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--gray);
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

/* ---------- 发展历程 / 时间轴 ---------- */
.page-about .about-tl__lede {
  max-width: 40em;
}
.page-about .about-fig--tl {
  margin-top: 38px;
  margin-bottom: 0;
}
.page-about .about-timeline {
  list-style: none;
  margin: 42px 0 0;
  padding: 0;
  border-left: 1px solid var(--line-mid);
}
.page-about .about-tl-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 0 16px;
  padding: 22px 0 24px 18px;
  border-top: 1px solid var(--line);
  position: relative;
  transition: background var(--t) var(--ease);
}
.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 30px;
  width: 7px;
  height: 7px;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  transition: background var(--t) var(--ease), border-color var(--t) var(--ease);
}
.page-about .about-tl-item:hover::before {
  background: var(--red);
  border-color: var(--red);
}
.page-about .about-tl__mark {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.page-about .about-tl__no {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--red);
}
.page-about .about-tl__year {
  font-family: var(--mono);
  font-size: 15px;
  color: var(--gray);
}
.page-about .about-tl__body h3 {
  margin: 0 0 10px;
}
.page-about .about-tl__body p {
  font-size: 16px;
  color: #33383F;
  max-width: 40em;
}
.page-about .about-tl__result {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--cyan);
  padding-left: 16px;
  border-left: 2px solid var(--cyan);
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-reach__lede {
  max-width: 38em;
}
.page-about .about-reach__strip {
  margin-top: 48px;
  border-top: 1px solid var(--line-mid);
  border-bottom: 1px solid var(--line-mid);
  background: rgba(252, 251, 249, 0.6);
}
.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.page-about .about-region {
  padding: 20px 14px 22px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background var(--t) var(--ease);
}
.page-about .about-region:hover {
  background: var(--red-mist);
}
.page-about .about-region__num {
  display: block;
  font-family: var(--mono);
  font-size: 30px;
  font-weight: 600;
  line-height: 1;
  color: var(--cyan-deep);
  letter-spacing: -0.02em;
}
.page-about .about-region__name {
  display: block;
  margin-top: 10px;
  font-size: 16px;
  font-weight: 900;
  letter-spacing: 0.02em;
}
.page-about .about-region__list {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--gray);
}

.page-about .about-reach__foot {
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  margin-top: 46px;
}
.page-about .about-reach__note h3 {
  margin-bottom: 14px;
}
.page-about .about-reach__note p {
  font-size: 16px;
  color: #33383F;
  max-width: 36em;
}
.page-about .about-reach__hint {
  margin-top: 16px;
  padding: 12px 16px;
  background: var(--gold-mist);
  border-left: 3px solid var(--gold);
  font-size: 15px;
  color: var(--ink);
}
.page-about .about-fig--reach {
  margin: 0;
  max-width: 380px;
}

/* ---------- 企业客户链路 ---------- */
.page-about .about-ent__lede {
  max-width: 40em;
}
.page-about .about-chain {
  list-style: none;
  counter-reset: chain;
  margin: 46px 0 0;
  padding: 0;
}
.page-about .about-chain__item {
  counter-increment: chain;
  position: relative;
  padding: 22px 0 26px 52px;
  border-top: 1px solid var(--line);
}
.page-about .about-chain__item:last-child {
  border-bottom: 1px solid var(--line);
}
.page-about .about-chain__item::before {
  content: "0" counter(chain);
  position: absolute;
  left: 0;
  top: 24px;
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--red);
  letter-spacing: -0.02em;
}
.page-about .about-chain__item h3 {
  font-size: clamp(17px, 1.9vw, 21px);
}
.page-about .about-chain__item p {
  margin-top: 10px;
  font-size: 16px;
  color: #33383F;
  max-width: 42em;
}

/* ---------- 服务等级 ---------- */
.page-about .about-tier__lede {
  max-width: 38em;
}
.page-about .about-tiers {
  display: grid;
  gap: 20px;
  margin-top: 44px;
}
.page-about .about-tier {
  background: var(--paper);
  border: 1px solid var(--line-mid);
  border-top: 3px solid var(--cyan);
  padding: 24px 22px 26px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--t) var(--ease);
}
.page-about .about-tier--priority {
  border-top-color: var(--red);
}
.page-about .about-tier--exclusive {
  border-top-color: var(--gold);
  background: var(--cyan-deep);
  border-color: var(--cyan-deep);
}
.page-about .about-tier__badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  padding: 3px 8px;
  color: var(--paper);
  background: var(--cyan);
}
.page-about .about-tier--priority .about-tier__badge {
  background: var(--red);
}
.page-about .about-tier--exclusive .about-tier__badge {
  background: var(--gold);
  color: var(--ink);
}
.page-about .about-tier__head {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.page-about .about-tier--exclusive .about-tier__head {
  border-bottom-color: rgba(252, 251, 249, 0.28);
}
.page-about .about-tier__head h3 {
  margin-top: 14px;
  font-size: clamp(21px, 2.4vw, 26px);
}
.page-about .about-tier--exclusive .about-tier__head h3 {
  color: var(--paper);
}
.page-about .about-tier__for {
  margin-top: 8px;
  font-size: 14px;
  color: var(--gray);
}
.page-about .about-tier--exclusive .about-tier__for {
  color: rgba(252, 251, 249, 0.7);
}
.page-about .about-tier__rows {
  margin: 0;
  padding: 0;
  flex: 1;
}
.page-about .about-tier__row {
  padding: 16px 0 14px;
  border-bottom: 1px solid var(--line);
}
.page-about .about-tier__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-about .about-tier--exclusive .about-tier__row {
  border-bottom-color: rgba(252, 251, 249, 0.2);
}
.page-about .about-tier__row dt {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}
.page-about .about-tier--priority .about-tier__row dt {
  color: var(--red);
}
.page-about .about-tier--exclusive .about-tier__row dt {
  color: var(--gold);
}
.page-about .about-tier__row dd {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: #33383F;
}
.page-about .about-tier--exclusive .about-tier__row dd {
  color: rgba(252, 251, 249, 0.92);
}

/* ---------- 备案与资质 ---------- */
.page-about .about-cred {
  color: var(--paper);
}
.page-about .about-cred .eyebrow {
  color: var(--gold-mist);
}
.page-about .about-cred .eyebrow::before {
  background: var(--gold);
}
.page-about .about-cred h2 {
  color: var(--paper);
}
.page-about .about-cred__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 38px;
}
.page-about .about-cred__intro p {
  margin-top: 18px;
  font-size: 16px;
  color: rgba(252, 251, 249, 0.78);
  max-width: 30em;
}
.page-about .about-cred__intro .btn {
  margin-top: 26px;
}
.page-about .about-cred__list {
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(252, 251, 249, 0.28);
}
.page-about .about-cred__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 16px 0 18px;
  border-bottom: 1px solid rgba(252, 251, 249, 0.18);
}
.page-about .about-cred__item dt {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: rgba(252, 251, 249, 0.6);
}
.page-about .about-cred__item dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--paper);
}
.page-about .about-cred__item dd.mono {
  font-family: var(--mono);
  font-size: 17px;
  letter-spacing: 0.02em;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-reach__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-cred__item {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 0 24px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 64px;
    align-items: end;
  }
  .page-about .about-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
  }
  .page-about .about-role {
    padding: 22px 28px 6px;
    border-right: 1px solid var(--line);
  }
  .page-about .about-role:first-child {
    padding-left: 0;
  }
  .page-about .about-role:last-child {
    border-right: 0;
    padding-right: 0;
  }
  .page-about .about-tl-item {
    grid-template-columns: 118px minmax(0, 1fr);
    gap: 0 36px;
    padding: 26px 0 30px 24px;
  }
  .page-about .about-reach__grid {
    grid-template-columns: repeat(7, minmax(0, 1fr));
  }
  .page-about .about-reach__foot {
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 48px;
    align-items: start;
  }
  .page-about .about-tiers {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .about-cred__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 6fr);
    gap: 64px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-fig--tl img {
    max-height: 300px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-cell,
  .page-about .about-region,
  .page-about .about-tl-item,
  .page-about .about-tier,
  .page-about .crumbs a {
    transition: none;
  }
}
<<<END>>>