.page-about {
  --about-line: rgba(11, 30, 45, .12);
  --about-band: rgba(169, 184, 174, .22);
  background: var(--paper);
  color: var(--graphite);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.9;
  overflow-x: hidden;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

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

/* ---------------- 首屏 ---------------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(16px, 2.6vw, 30px) 0 clamp(44px, 7vw, 88px);
  background:
    radial-gradient(120% 92% at 88% 0%, rgba(20, 224, 200, .10), transparent 56%),
    linear-gradient(180deg, var(--paper) 0%, var(--paper) 58%, var(--about-band) 100%);
}

.page-about .about-hero__skyline {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: min(40vh, 280px);
  z-index: 0;
  pointer-events: none;
  background-repeat: no-repeat;
  background-image:
    repeating-linear-gradient(90deg, rgba(11, 30, 45, .09) 0 24px, transparent 24px 62px),
    repeating-linear-gradient(90deg, rgba(169, 184, 174, .55) 0 36px, transparent 36px 96px);
  background-size: 100% 38%, 100% 62%;
  background-position: left bottom, left bottom;
  -webkit-mask-image: linear-gradient(to top, #000 0 52%, transparent 100%);
  mask-image: linear-gradient(to top, #000 0 52%, transparent 100%);
}

.page-about .about-hero .shell {
  position: relative;
  z-index: 1;
}

.page-about .crumbs {
  margin-bottom: clamp(22px, 3.4vw, 40px);
  font-size: var(--fs-sm);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  margin-top: clamp(14px, 2.4vw, 28px);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(36px, 6.6vw, 88px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--ink);
  margin: 14px 0 20px;
}

.page-about .about-hero h1 em {
  font-style: normal;
  font-weight: 700;
  display: inline-block;
  padding-bottom: .04em;
  background: linear-gradient(180deg,
      transparent 70%,
      var(--cyan-soft) 70%,
      var(--cyan-soft) 90%,
      transparent 90%);
}

.page-about .about-hero .lede {
  max-width: 44ch;
  color: var(--graphite);
  line-height: 1.9;
  margin: 0;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .about-hero__card {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--r-l);
  padding: clamp(20px, 2.6vw, 30px);
  box-shadow: 0 30px 70px -46px rgba(11, 30, 45, .95);
  overflow: hidden;
}

.page-about .about-hero__card::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
}

.page-about .about-hero__card-label {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-idx);
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--cyan-soft);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-hero__facts li {
  display: grid;
  gap: 3px;
  padding-top: 14px;
  border-top: 1px solid var(--line-light);
}

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

.page-about .about-hero__facts .mono {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.3vw, 26px);
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--white);
  line-height: 1.1;
}

.page-about .about-hero__facts span:last-child {
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: rgba(245, 242, 234, .74);
}

@media (min-width: 920px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, .58fr);
    align-items: end;
  }
}

/* ---------------- 章节骨架 ---------------- */
.page-about .about-sec {
  position: relative;
  padding: clamp(46px, 6.6vw, 92px) 0;
}

.page-about .about-sec--tint {
  background: linear-gradient(180deg, var(--paper) 0%, rgba(169, 184, 174, .26) 100%);
}

.page-about .about-sec--sage {
  background: rgba(169, 184, 174, .20);
}

.page-about .about-sec--closing {
  background: linear-gradient(180deg, rgba(169, 184, 174, .22) 0%, var(--paper) 88%);
}

.page-about .sec-head {
  display: flex;
  align-items: flex-start;
  gap: clamp(12px, 2vw, 24px);
  margin-bottom: clamp(24px, 3.6vw, 44px);
}

.page-about .sec-head__text {
  min-width: 0;
}

.page-about .section-mark {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.2vw, 54px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: .02em;
  color: rgba(169, 184, 174, .9);
  transition: color var(--dur) var(--ease);
}

.page-about .about-sec.is-current .section-mark {
  color: var(--cyan);
}

.page-about .about-sec h2 {
  font-family: var(--font-display);
  font-weight: 250;
  font-size: var(--fs-h2);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--ink);
  margin: 8px 0 0;
  max-width: 24ch;
}

.page-about .about-copy {
  max-width: 62ch;
}

.page-about .about-copy p {
  margin: 0 0 1.15em;
  line-height: 1.92;
}

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

.page-about .about-copy strong {
  color: var(--ink);
  font-weight: 600;
}

.page-about .about-copy a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 1px;
  transition: color var(--dur) var(--ease);
}

.page-about .about-copy a:hover,
.page-about .about-copy a:focus-visible {
  color: var(--ink-2);
  border-bottom-color: var(--ink-2);
}

.page-about .about-copy--lead {
  max-width: 58ch;
  margin: 0 0 clamp(22px, 3vw, 34px);
  font-size: var(--fs-lede);
  line-height: 1.85;
  color: var(--ink-2);
}

.page-about .about-split {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
}

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    align-items: start;
  }

  .page-about .about-split--wide {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr);
    align-items: center;
  }

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

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

.page-about .media figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-idx);
  letter-spacing: .06em;
  color: rgba(34, 49, 58, .62);
}

/* ---------------- 时间轴 ---------------- */
.page-about .year-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(20px, 2.8vw, 30px);
}

.page-about .year-nav a {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: .04em;
  padding: 7px 15px;
  border-radius: 999px;
  border: 1px solid var(--about-line);
  color: var(--ink);
  text-decoration: none;
  transition: background var(--dur) var(--ease),
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-about .year-nav a:hover,
.page-about .year-nav a:focus-visible {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.page-about .timeline-visual {
  margin-bottom: clamp(26px, 3.6vw, 44px);
}

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

.page-about .timeline__item {
  position: relative;
  padding: clamp(20px, 2.6vw, 30px) 0 clamp(20px, 2.6vw, 30px) clamp(22px, 3.4vw, 34px);
  border-left: 1px solid var(--about-line);
  transition: background var(--dur) var(--ease);
}

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: calc(clamp(20px, 2.6vw, 30px) + .6em);
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--sage);
  transform: translateX(-55%);
  transition: background var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.page-about .timeline__item:target {
  background: rgba(20, 224, 200, .10);
  border-radius: 0 var(--r-m) var(--r-m) 0;
}

.page-about .timeline__item:target::before {
  background: var(--cyan);
  border-color: var(--cyan);
  transform: translateX(-55%) scale(1.3);
}

.page-about .timeline__year {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--ink);
}

.page-about .timeline__year small {
  display: block;
  margin-top: 9px;
  font-size: var(--fs-idx);
  letter-spacing: .2em;
  color: rgba(34, 49, 58, .5);
}

.page-about .timeline__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-h4);
  color: var(--ink);
}

.page-about .timeline__body p {
  margin: 0;
  max-width: 64ch;
  line-height: 1.9;
}

@media (min-width: 760px) {
  .page-about .timeline__item {
    display: grid;
    grid-template-columns: minmax(0, 148px) minmax(0, 1fr);
    gap: clamp(16px, 3vw, 44px);
    align-items: start;
  }

  .page-about .timeline__year {
    margin-bottom: 0;
  }
}

/* ---------------- 团队 ---------------- */
.page-about .team-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .team-card {
  position: relative;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-m);
  padding: clamp(18px, 2.4vw, 26px);
  transition: transform var(--dur) var(--ease),
    box-shadow var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
}

.page-about .team-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--amber);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--dur) var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  transform: translateY(-3px);
  border-color: rgba(20, 224, 200, .55);
  box-shadow: 0 20px 44px -32px rgba(11, 30, 45, .7);
}

.page-about .team-card:hover::after,
.page-about .team-card:focus-within::after {
  transform: scaleY(1);
}

.page-about .team-card__num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--ink);
}

.page-about .team-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-h4);
  color: var(--ink);
}

.page-about .team-card__lead {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: rgba(34, 49, 58, .78);
}

.page-about .team-card__desc {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: rgba(34, 49, 58, .86);
  border-top: 1px solid var(--line-soft);
  transition: max-height 340ms var(--ease),
    opacity 240ms var(--ease),
    margin-top 240ms var(--ease),
    padding-top 240ms var(--ease);
}

.page-about .team-card:hover .team-card__desc,
.page-about .team-card:focus-within .team-card__desc {
  max-height: 300px;
  opacity: 1;
  margin-top: 12px;
  padding-top: 12px;
}

@media (hover: none) {
  .page-about .team-card__desc {
    max-height: none;
    opacity: 1;
    margin-top: 12px;
    padding-top: 12px;
  }
}

@media (min-width: 640px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------------- 工作方式 ---------------- */
.page-about .note-panel {
  display: grid;
  gap: 10px;
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--amber);
  border-radius: var(--r-m);
  padding: clamp(18px, 2.4vw, 26px);
}

.page-about .note-panel p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
}

.page-about .note-panel__key {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.4vw, 27px) !important;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--ink);
  line-height: 1.2 !important;
}

.page-about .steps {
  list-style: none;
  margin: clamp(24px, 3.4vw, 42px) 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .step {
  position: relative;
  padding: 20px 0;
  border-top: 1px solid var(--about-line);
}

.page-about .step::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--sage);
  transition: background var(--dur) var(--ease);
}

.page-about .step:hover::before {
  background: var(--cyan);
}

.page-about .step__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-idx);
  letter-spacing: .18em;
  color: rgba(34, 49, 58, .55);
}

.page-about .step h3 {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-h4);
  color: var(--ink);
}

.page-about .step p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: rgba(34, 49, 58, .82);
}

@media (min-width: 920px) {
  .page-about .steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: clamp(12px, 2vw, 26px);
  }

  .page-about .step {
    padding-right: 4px;
  }
}

/* ---------------- 行业与生态 ---------------- */
.page-about .industry-chips {
  margin: 22px 0 0;
}

/* ---------------- 客户结果 ---------------- */
.page-about .result-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .result {
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-m);
  padding: clamp(18px, 2.2vw, 24px);
}

.page-about .result__num {
  display: block;
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: .01em;
  color: var(--ink);
}

.page-about .result__num span {
  font-size: .46em;
  margin-left: 4px;
  color: var(--sage);
  letter-spacing: .04em;
}

.page-about .result p:last-child {
  margin: 12px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.78;
  color: rgba(34, 49, 58, .8);
}

@media (min-width: 640px) {
  .page-about .result-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .result-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-closing__media {
  margin-top: clamp(28px, 4vw, 48px);
}

.page-about .about-closing__rule {
  margin: clamp(24px, 3.4vw, 40px) 0 clamp(20px, 2.6vw, 30px);
}

.page-about .about-cta {
  display: grid;
  gap: 16px;
}

.page-about .about-cta__lead {
  margin: 0;
  max-width: 46ch;
  font-size: var(--fs-lede);
  line-height: 1.8;
  color: var(--ink-2);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (min-width: 900px) {
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
  }

  .page-about .about-cta__links {
    justify-content: flex-end;
  }
}
<<<END>>>