.page-about {
  display: block;
  padding-bottom: 72px;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: 26px;
  padding-bottom: 6px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 20px;
  padding-bottom: 44px;
}

.page-about .about-hero-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero-title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 8vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--frost);
  max-width: 16em;
  text-transform: uppercase;
}

.page-about .about-hero-lede {
  margin-top: 20px;
  max-width: 64ch;
  color: var(--frost);
}

.page-about .about-hero-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--edge-w);
  margin-top: 34px;
  border: var(--edge-w) solid var(--edge);
  background: var(--edge);
  box-shadow: var(--shadow-hard);
}

.page-about .about-strip-item {
  display: flex;
  flex-direction: row;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  background: var(--steel);
}

.page-about .about-strip-num {
  font-size: 26px;
  font-weight: 600;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-strip-label {
  font-size: 14px;
}

@media (min-width: 720px) {
  .page-about .about-hero-strip {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-strip-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding: 20px 22px;
  }
  .page-about .about-strip-num {
    font-size: 32px;
  }
}

/* ---------- 01 我们在做的事 ---------- */
.page-about .about-what-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 30px;
}

.page-about .about-what-body p {
  margin: 0 0 16px;
  color: var(--frost);
}

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

.page-about .about-what-side {
  padding: 22px 20px 24px;
}

.page-about .about-side-title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--frost);
}

.page-about .about-side-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-side-list li {
  padding-left: 14px;
  border-left: 2px solid var(--edge);
}

.page-about .about-side-list p {
  margin: 8px 0 0;
  font-size: 15px;
  color: var(--cool);
}

@media (min-width: 1080px) {
  .page-about .about-what-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }
}

/* ---------- 02 建档历程 ---------- */
.page-about .about-timeline-lede {
  max-width: 56ch;
  margin-top: 14px;
}

.page-about .about-timeline-media {
  margin: 34px 0 0;
  border: var(--edge-w) solid var(--edge);
  box-shadow: var(--shadow-hard);
}

.page-about .tl-list {
  list-style: none;
  margin: 44px 0 0;
  padding: 0;
  position: relative;
}

.page-about .tl-list::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--violet) 55%, var(--magenta) 100%);
  opacity: 0.7;
}

.page-about .tl-item {
  position: relative;
  padding-left: 34px;
  padding-bottom: 26px;
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
}

.page-about .tl-dot {
  position: absolute;
  left: 0;
  top: 10px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(47, 243, 224, 0.14);
}

.page-about .tl-card {
  padding: 20px 20px 22px;
}

.page-about .tl-era {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .tl-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--frost);
  text-transform: uppercase;
}

.page-about .tl-card p {
  margin: 0;
  color: var(--cool);
  font-size: 15.5px;
}

.page-about .tl-card .tag {
  margin-top: 14px;
}

@media (min-width: 1080px) {
  .page-about .tl-list::before {
    left: 50%;
    transform: translateX(-1px);
  }
  .page-about .tl-item {
    width: 50%;
    padding-left: 0;
    padding-right: 48px;
    padding-bottom: 34px;
  }
  .page-about .tl-item:nth-child(even) {
    margin-left: 50%;
    padding-right: 0;
    padding-left: 48px;
  }
  .page-about .tl-dot {
    left: auto;
    right: -8px;
    top: 26px;
  }
  .page-about .tl-item:nth-child(even) .tl-dot {
    right: auto;
    left: -8px;
  }
}

/* ---------- 03 团队分工 ---------- */
.page-about .about-team-lede {
  max-width: 54ch;
  margin-top: 14px;
}

.page-about .about-team-bar {
  display: flex;
  flex-direction: column;
  gap: var(--edge-w);
  margin-top: 32px;
  border: var(--edge-w) solid var(--edge);
  background: var(--edge);
  box-shadow: var(--shadow-hard);
}

.page-about .team-seg {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  position: relative;
  cursor: default;
  transition: transform 240ms var(--ease), filter 240ms var(--ease);
}

.page-about .team-seg--data {
  background: linear-gradient(120deg, rgba(47, 243, 224, 0.9) 0%, rgba(47, 243, 224, 0.55) 100%);
}

.page-about .team-seg--tech {
  background: linear-gradient(120deg, rgba(255, 46, 136, 0.85) 0%, rgba(255, 46, 136, 0.45) 100%);
}

.page-about .team-seg--content {
  background: linear-gradient(120deg, rgba(255, 194, 75, 0.92) 0%, rgba(255, 194, 75, 0.5) 100%);
}

.page-about .team-seg-num {
  font-size: 26px;
  font-weight: 600;
  line-height: 1;
  color: var(--ink);
}

.page-about .team-seg-label {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
}

.page-about .team-seg-note {
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(5, 7, 14, 0.72);
}

.page-about .team-seg:hover,
.page-about .team-seg:focus-visible {
  filter: brightness(1.08);
  outline: none;
}

@media (min-width: 720px) {
  .page-about .about-team-bar {
    flex-direction: row;
    gap: 0;
  }
  .page-about .team-seg {
    height: 168px;
    justify-content: flex-end;
    padding: 20px;
  }
  .page-about .team-seg--data {
    flex: 22 1 0;
  }
  .page-about .team-seg--tech {
    flex: 15 1 0;
  }
  .page-about .team-seg--content {
    flex: 8 1 0;
  }
  .page-about .team-seg-note {
    font-size: 12.5px;
  }
  .page-about .team-seg {
    border-right: var(--edge-w) solid var(--edge);
  }
  .page-about .team-seg:last-child {
    border-right: 0;
  }
}

.page-about .about-team-cards {
  margin-top: 28px;
}

.page-about .about-team-card {
  padding: 22px 20px 24px;
}

.page-about .about-team-card-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-team-card p {
  margin: 0;
  font-size: 15px;
  color: var(--cool);
}

/* ---------- 04 整理流程 ---------- */
.page-about .about-flow-lede {
  max-width: 56ch;
  margin-top: 14px;
}

.page-about .flow-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 34px;
}

.page-about .flow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: flow;
}

.page-about .flow-step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  padding: 18px 0;
  border-bottom: var(--edge-w) solid var(--edge);
}

.page-about .flow-step:first-child {
  border-top: var(--edge-w) solid var(--edge);
}

.page-about .flow-index {
  font-size: 18px;
  font-weight: 600;
  color: var(--magenta);
  letter-spacing: 0.04em;
  line-height: 1.4;
}

.page-about .flow-title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.03em;
  color: var(--frost);
  text-transform: uppercase;
}

.page-about .flow-body p {
  margin: 0;
  font-size: 15px;
  color: var(--cool);
}

.page-about .about-flow-media {
  margin: 0;
  border: var(--edge-w) solid var(--edge);
  box-shadow: var(--shadow-cyan);
}

@media (min-width: 1080px) {
  .page-about .flow-layout {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }
  .page-about .about-flow-media {
    position: sticky;
    top: 32px;
  }
}

/* ---------- 05 协作网络 ---------- */
.page-about .about-network-lede {
  max-width: 58ch;
  margin-top: 14px;
}

.page-about .network-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin-top: 34px;
}

.page-about .about-network-media {
  margin: 0;
  border: var(--edge-w) solid var(--edge);
  box-shadow: var(--shadow-magenta);
}

.page-about .network-cards {
  display: grid;
  gap: 2px;
  border: var(--edge-w) solid var(--edge);
  background: var(--edge);
}

.page-about .network-card {
  border: 0;
  box-shadow: none;
  padding: 22px 20px 24px;
  transition: background 240ms var(--ease), transform 240ms var(--ease);
}

.page-about .network-card:hover {
  background: var(--violet);
}

.page-about .network-card-title {
  margin: 12px 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--frost);
  text-transform: uppercase;
}

.page-about .network-card p {
  margin: 0;
  font-size: 15px;
  color: var(--cool);
}

@media (min-width: 1080px) {
  .page-about .network-layout {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 40px;
    align-items: start;
  }
  .page-about .about-network-media {
    max-width: 460px;
  }
}

/* ---------- 06 我们帮得上什么 ---------- */
.page-about .about-offer-grid {
  margin-top: 32px;
}

.page-about .about-offer-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 22px 26px;
  border-top: 4px solid var(--cyan);
}

.page-about .about-offer-card:nth-child(2) {
  border-top-color: var(--magenta);
}

.page-about .about-offer-card:nth-child(3) {
  border-top-color: var(--gold);
}

.page-about .about-offer-card:nth-child(4) {
  border-top-color: var(--cool);
}

.page-about .about-offer-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.03em;
  color: var(--frost);
  text-transform: uppercase;
}

.page-about .about-offer-card p {
  margin: 0;
  flex: 1 1 auto;
  font-size: 15px;
  color: var(--cool);
}

.page-about .about-offer-link {
  align-self: flex-start;
  margin-top: 6px;
}

.page-about .about-offer-note {
  margin: 26px 0 0;
  font-size: 15px;
  color: var(--cool);
}

.page-about .about-offer-note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------- 07 服务节奏 ---------- */
.page-about .service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  margin-top: 32px;
  border: var(--edge-w) solid var(--edge);
  background: var(--edge);
  box-shadow: var(--shadow-hard);
}

.page-about .service-card {
  border: 0;
  box-shadow: none;
  padding: 22px 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .service-card-label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .service-card-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--frost);
  text-transform: uppercase;
}

.page-about .service-card p {
  margin: 0;
  font-size: 15px;
  color: var(--cool);
}

.page-about .service-contact {
  color: var(--gold) !important;
  font-size: 14px !important;
  letter-spacing: 0.02em;
  word-break: break-all;
}

.page-about .service-link {
  align-self: flex-start;
  margin-top: 6px;
}

.page-about .service-foot {
  margin: 24px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
}

@media (min-width: 720px) {
  .page-about .service-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .service-card {
    border-right: var(--edge-w) solid var(--edge);
  }
  .page-about .service-card:nth-child(2n) {
    border-right: 0;
  }
}

@media (min-width: 1080px) {
  .page-about .service-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .service-card {
    border-right: var(--edge-w) solid var(--edge);
    border-bottom: 0;
  }
  .page-about .service-card:nth-child(2n) {
    border-right: var(--edge-w) solid var(--edge);
  }
  .page-about .service-card:last-child {
    border-right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-seg,
  .page-about .network-card {
    transition: none;
  }
}
<<<END>>>