.page-about {
  --about-ink: #0B1F1A;
  --about-line: rgba(143, 169, 161, 0.22);
  --about-cut: 30deg;
  position: relative;
  isolation: isolate;
}

/* ---------- 面包屑 ---------- */
.page-about .crumbs {
  padding: calc(var(--header-offset) + 20px) 0 0;
}

/* ---------- 首屏 ---------- */
.page-about__hero {
  position: relative;
  overflow: hidden;
  padding: var(--space-5) 0 var(--space-5);
}

.page-about__wedge {
  position: absolute;
  inset: -10% -20% auto auto;
  width: 78%;
  height: 118%;
  background:
    linear-gradient(168deg, rgba(43, 240, 200, 0.16) 0%, rgba(43, 240, 200, 0) 58%),
    linear-gradient(200deg, rgba(255, 106, 43, 0.14) 0%, rgba(255, 106, 43, 0) 46%),
    var(--deep-green-layer);
  clip-path: polygon(22% 0, 100% 0, 100% 100%, 0 100%);
  z-index: -1;
}

.page-about__hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 46%;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan-signal), rgba(43, 240, 200, 0));
}

.page-about__hero-inner > .eyebrow {
  margin-bottom: var(--space-3);
}

.page-about__hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(34px, 8vw, 72px);
  line-height: 1.02;
  letter-spacing: 0.02em;
  color: var(--paper-light);
  max-width: 16em;
  margin: 0 0 var(--space-4);
}

.page-about__hero-body {
  display: grid;
  gap: var(--space-4);
}

.page-about__lede {
  font-size: 17px;
  line-height: 1.75;
  color: var(--paper-light);
  max-width: 60ch;
  margin: 0;
}

.page-about__hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: var(--space-3) 0 0;
  border-top: 1px solid var(--about-line);
}

.page-about__hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about__hero-num {
  font-family: var(--font-data);
  font-size: clamp(24px, 6vw, 40px);
  font-weight: 700;
  color: var(--cyan-signal);
  line-height: 1;
}

.page-about__hero-unit {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist-gray);
  line-height: 1.5;
}

.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

/* ---------- 数字条带 ---------- */
.page-about__scale {
  padding-top: var(--space-5);
}

.page-about__sub {
  margin: var(--space-2) 0 0;
  max-width: 62ch;
  color: var(--mist-gray);
  font-size: 16px;
  line-height: 1.75;
}

.page-about__bands {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}

.page-about__band {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas:
    "label value"
    "unit  value";
  align-items: center;
  gap: 2px var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--about-line);
  transition: background-color 200ms var(--ease-out);
}

.page-about__band:hover {
  background-color: var(--wash-cyan);
}

.page-about__band-label {
  grid-area: label;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan-deep);
}

.page-about__band-value {
  grid-area: value;
  font-family: var(--font-data);
  font-size: clamp(28px, 7vw, 52px);
  font-weight: 700;
  line-height: 1;
  color: var(--paper-light);
  justify-self: end;
}

.page-about__band-unit {
  grid-area: unit;
  font-size: 13px;
  color: var(--mist-gray);
  line-height: 1.6;
}

.page-about__scale-note {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.page-about__scale-panel {
  padding: var(--space-3);
}

.page-about__scale-panel h3 {
  font-family: var(--font-heading);
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--paper-light);
  margin: 0 0 var(--space-2);
}

.page-about__scale-panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-gray);
}

/* ---------- 起点 ---------- */
.page-about__origin {
  position: relative;
}

.page-about__origin-grid {
  display: grid;
  gap: var(--space-4);
}

.page-about__origin-media {
  margin: 0;
  transform: rotate(-1.4deg);
}

.page-about__origin-media .media__frame {
  clip-path: polygon(0 0, 100% 6%, 100% 100%, 0 94%);
  border-radius: 0;
}

.page-about__origin-media .media__img,
.page-about__origin-media img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about__origin-media .media__caption {
  display: block;
  margin-top: var(--space-2);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist-gray);
}

.page-about__origin-copy .section__head {
  margin-bottom: var(--space-3);
}

.page-about__origin-copy .prose p {
  margin: 0 0 var(--space-3);
  color: var(--paper-light);
  font-size: 16px;
  line-height: 1.78;
}

.page-about__origin-copy .prose p:last-child {
  margin-bottom: var(--space-3);
}

/* ---------- 团队 ---------- */
.page-about__team-grid {
  margin-top: var(--space-4);
}

.page-about__team-card {
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  border-left: 2px solid var(--cyan-signal);
}

.page-about__team-card:nth-child(2n) {
  border-left-color: var(--orange-signal);
}

.page-about__team-card h3 {
  font-family: var(--font-heading);
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--paper-light);
  margin: 0;
}

.page-about__team-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-gray);
}

/* ---------- 时间线 ---------- */
.page-about__timeline-media {
  margin: 0 0 var(--space-4);
  transform: rotate(0.8deg);
}

.page-about__timeline-media .media__frame {
  clip-path: polygon(0 4%, 100% 0, 100% 96%, 0 100%);
  border-radius: 0;
}

.page-about__timeline-media img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about__timeline-media .media__caption {
  display: block;
  margin-top: var(--space-2);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist-gray);
}

.page-about__rail {
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--space-3);
  border-left: 1px solid var(--line-cyan);
  display: grid;
  gap: var(--space-3);
}

.page-about__node details {
  background: var(--deep-green-layer);
  border-radius: var(--radius-m);
  border: 1px solid var(--about-line);
  overflow: hidden;
}

.page-about__node summary {
  display: grid;
  grid-template-columns: 18px auto 1fr;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  list-style: none;
  transition: background-color 180ms var(--ease-out);
}

.page-about__node summary::-webkit-details-marker {
  display: none;
}

.page-about__node summary:hover {
  background-color: var(--wash-cyan);
}

.page-about__node[open] summary {
  background-color: rgba(43, 240, 200, 0.07);
}

.page-about__node-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan-signal);
  box-shadow: 0 0 0 4px rgba(43, 240, 200, 0.16);
  position: relative;
  left: calc(-1 * var(--space-3) - 5px);
}

.page-about__node-dot--now {
  background: var(--orange-signal);
  box-shadow: 0 0 0 4px rgba(255, 106, 43, 0.18);
}

.page-about__node-ver {
  font-family: var(--font-data);
  font-size: 14px;
  font-weight: 700;
  color: var(--orange-signal);
  letter-spacing: 0.04em;
}

.page-about__node-name {
  font-family: var(--font-heading);
  font-size: 17px;
  letter-spacing: 0.03em;
  color: var(--paper-light);
}

.page-about__node-body {
  padding: 0 var(--space-3) var(--space-3) calc(18px + var(--space-4));
}

.page-about__node-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--mist-gray);
}

/* ---------- 合作 ---------- */
.page-about__partners-side h2 {
  font-family: var(--font-heading);
  font-size: clamp(26px, 5vw, 40px);
  line-height: 1.08;
  letter-spacing: 0.02em;
  color: var(--paper-light);
  margin: var(--space-2) 0 var(--space-3);
}

.page-about__partners-side .prose {
  color: var(--mist-gray);
  font-size: 15px;
  line-height: 1.78;
  margin: 0;
}

.page-about__partners-main {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.page-about__partner-card {
  padding: var(--space-3);
  border-top: 2px solid var(--cyan-deep);
}

.page-about__partner-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  letter-spacing: 0.03em;
  color: var(--paper-light);
  margin: 0 0 var(--space-2);
}

.page-about__partner-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist-gray);
}

.page-about__partners-cta {
  margin: 0;
}

/* ---------- 福建站点 ---------- */
.page-about__base-grid {
  display: grid;
  gap: var(--space-4);
}

.page-about__base-copy .prose p {
  margin: 0 0 var(--space-3);
  color: var(--paper-light);
  font-size: 16px;
  line-height: 1.78;
}

.page-about__base-copy .contact-list {
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: var(--space-3) 0 0;
  border-top: 1px solid var(--about-line);
  display: grid;
  gap: var(--space-2);
}

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

.page-about__base-media .media__frame {
  clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
  border-radius: 0;
}

.page-about__base-media img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about__base-media .media__caption {
  display: block;
  margin-top: var(--space-2);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist-gray);
}

/* ---------- 下一步 ---------- */
.page-about__next {
  padding-bottom: var(--space-6);
}

.page-about__next-inner {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-3);
  background: var(--deep-green-layer);
  border-radius: var(--radius-l);
  border: 1px solid var(--line-cyan);
}

.page-about__next-inner h2 {
  font-family: var(--font-heading);
  font-size: clamp(24px, 5vw, 38px);
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--paper-light);
  margin: var(--space-2) 0 var(--space-2);
}

.page-about__next-inner .prose {
  color: var(--mist-gray);
  font-size: 15px;
  line-height: 1.75;
  margin: 0;
}

.page-about__next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about__scale-note {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about__origin-grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
    gap: var(--space-5);
  }

  .page-about__origin-media {
    margin-top: var(--space-4);
  }

  .page-about__rail {
    padding-left: var(--space-4);
    gap: var(--space-4);
  }

  .page-about__node-body {
    padding-left: calc(18px + var(--space-5));
  }

  .page-about__base-grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
    gap: var(--space-5);
  }

  .page-about__next-inner {
    grid-template-columns: 1fr auto;
    align-items: center;
    padding: var(--space-5) var(--space-4);
  }

  .page-about__next-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1080px) {
  .page-about__hero {
    padding: var(--space-6) 0 var(--space-6);
  }

  .page-about__hero-body {
    grid-template-columns: 1.4fr 1fr;
    align-items: end;
    gap: var(--space-5);
  }

  .page-about__hero-actions {
    margin-top: var(--space-5);
  }

  .page-about__band {
    grid-template-columns: 220px 1fr auto;
    grid-template-areas: "label unit value";
    padding: var(--space-2) 0 var(--space-2) var(--space-2);
    gap: var(--space-3);
  }

  .page-about__band-value {
    font-size: 56px;
  }

  .page-about__band-unit {
    align-self: center;
    font-size: 14px;
  }

  .page-about__origin-grid {
    grid-template-columns: 4fr 8fr;
  }

  .page-about__base-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about__band,
  .page-about__node summary {
    transition: none;
  }
}
</PAGE_CSS>>>