.page-about {
  --ab-gap: clamp(1.25rem, 3vw, 2.5rem);
  --ab-node-dot: 0.75rem;
}

.page-about .ab-hero {
  padding-top: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: var(--ab-gap);
  margin-top: 1.5rem;
  align-items: end;
}

.page-about .ab-hero__text h1 {
  margin: 0.6rem 0 0;
  font-size: clamp(1.65rem, 4.6vw, 2.9rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .ab-lead {
  margin: 1rem 0 0;
  max-width: 44ch;
  font-size: clamp(0.98rem, 1.6vw, 1.08rem);
  line-height: 1.85;
  color: var(--muted);
}

.page-about .ab-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 1.75rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.page-about .ab-hero__facts .stat__num {
  display: block;
  font-size: clamp(1.35rem, 2.8vw, 1.9rem);
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .ab-hero__facts .stat__label {
  display: block;
  margin-top: 0.35rem;
  font-size: 0.78rem;
  line-height: 1.45;
  color: var(--muted-2);
}

.page-about .ab-hero__media {
  margin: 0;
}

.page-about .ab-sec-head {
  max-width: 52ch;
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}

.page-about .ab-sec-head h2 {
  margin: 0.5rem 0 0;
  font-size: clamp(1.25rem, 3vw, 1.8rem);
  line-height: 1.4;
  color: var(--paper);
}

.page-about .ab-sec-lead {
  margin: 0.75rem 0 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--muted);
}

/* 01 时间轴 */
.page-about .ab-track {
  list-style: none;
  margin: 0;
  padding: 0 0 0 2.5rem;
  position: relative;
}

.page-about .ab-track::before {
  content: "";
  position: absolute;
  left: 1rem;
  top: 1.1rem;
  bottom: 1.4rem;
  width: 2px;
  background: linear-gradient(to bottom, var(--cyan) 0%, rgba(76, 243, 208, 0.28) 26%, var(--line) 60%, var(--line) 100%);
}

.page-about .ab-node {
  position: relative;
  padding: 0 0 clamp(1.5rem, 3vw, 2.1rem);
}

.page-about .ab-node:last-child {
  padding-bottom: 0;
}

.page-about .ab-node::before {
  content: "";
  position: absolute;
  left: calc(-2.5rem + 0.45rem);
  top: 0.55rem;
  width: var(--ab-node-dot);
  height: var(--ab-node-dot);
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--line);
}

.page-about .ab-node--current::before {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 0 4px rgba(76, 243, 208, 0.16);
}

.page-about .ab-node__year {
  margin: 0;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  color: var(--cyan-soft);
}

.page-about .ab-node--current .ab-node__year {
  color: var(--cyan);
}

.page-about .ab-node__title {
  margin: 0.35rem 0 0;
  font-size: clamp(1.02rem, 2.1vw, 1.22rem);
  line-height: 1.5;
  color: var(--paper);
}

.page-about .ab-node__desc {
  margin: 0.5rem 0 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--muted);
  max-width: 46ch;
}

.page-about .ab-tg {
  margin-top: 0.7rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.32rem 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--cyan-soft);
  background: transparent;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-s);
  cursor: pointer;
  transition: background 180ms var(--ease), border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-about .ab-tg::after {
  content: "+";
  font-size: 0.9rem;
  line-height: 1;
}

.page-about .ab-tg[aria-expanded="true"]::after {
  content: "−";
}

.page-about .ab-tg:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-about .ab-tg:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .ab-panel {
  margin-top: 0.75rem;
  padding: 0.85rem 1rem;
  border-left: 2px solid var(--cyan);
  background: rgba(11, 58, 46, 0.55);
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
}

.page-about .ab-panel p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.82;
  color: var(--muted);
}

/* 02 双主线 */
.page-about .ab-lanes__media {
  margin: 0 0 var(--ab-gap);
}

.page-about .ab-lanes {
  display: grid;
  gap: 1rem;
}

.page-about .ab-lane {
  position: relative;
  padding: 1.35rem 1.25rem;
  background: rgba(6, 35, 28, 0.72);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-l);
}

.page-about .ab-lane--tool {
  border-top: 2px solid var(--cyan);
}

.page-about .ab-lane--collect {
  border-top: 2px solid var(--cyan-soft);
}

.page-about .ab-lane h3 {
  margin: 0.7rem 0 0;
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  line-height: 1.5;
  color: var(--paper);
}

.page-about .ab-lane__lead {
  margin: 0.55rem 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .ab-list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .ab-list li {
  position: relative;
  padding-left: 1.15rem;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--paper);
}

.page-about .ab-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62rem;
  width: 0.42rem;
  height: 0.42rem;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-about .ab-lane--collect .ab-list li::before {
  background: var(--cyan-soft);
}

.page-about .ab-lanes__note {
  margin: 1.25rem 0 0;
  padding-top: 1rem;
  border-top: 1px dashed var(--line);
  font-size: 0.88rem;
  line-height: 1.85;
  color: var(--muted-2);
  max-width: 60ch;
}

/* 03 团队 */
.page-about .ab-team__grid {
  display: grid;
  gap: var(--ab-gap);
  align-items: start;
}

.page-about .ab-team__media {
  margin: 0;
}

.page-about .ab-roles {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.5rem;
}

.page-about .ab-role {
  padding: 0.9rem 0 0.9rem 1rem;
  border-left: 2px solid var(--line);
  transition: border-color 180ms var(--ease);
}

.page-about .ab-role:hover {
  border-left-color: var(--cyan);
}

.page-about .ab-role h3 {
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .ab-role h3 .num {
  margin-right: 0.5rem;
  color: var(--cyan);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
}

.page-about .ab-role p {
  margin: 0.4rem 0 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .ab-team__foot {
  margin: 1.75rem 0 0;
  padding: 1rem 1.15rem;
  background: rgba(11, 58, 46, 0.5);
  border-radius: var(--radius-m);
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--muted);
  max-width: 68ch;
}

/* 04 进站流程 */
.page-about .ab-check__grid {
  display: grid;
  gap: var(--ab-gap);
}

.page-about .ab-check__head h2 {
  margin: 0.5rem 0 0;
  font-size: clamp(1.25rem, 3vw, 1.8rem);
  line-height: 1.4;
  color: var(--char);
}

.page-about .ab-check__head .ab-sec-lead {
  color: rgba(10, 15, 13, 0.72);
}

.page-about .ab-check__steps {
  display: grid;
  gap: 1px;
  background: rgba(10, 15, 13, 0.16);
  border: 1px solid rgba(10, 15, 13, 0.16);
}

.page-about .ab-step {
  padding: 1.15rem 1.1rem;
  background: var(--shell);
}

.page-about .ab-step__idx {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: #0F4B3B;
}

.page-about .ab-step h3 {
  margin: 0.4rem 0 0;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--char);
}

.page-about .ab-step p {
  margin: 0.45rem 0 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: rgba(10, 15, 13, 0.76);
}

/* 05 数据来源 */
.page-about .ab-partners__grid {
  display: grid;
  gap: var(--ab-gap);
}

.page-about .ab-partners__grid h2 {
  margin: 0.5rem 0 0;
  font-size: clamp(1.25rem, 3vw, 1.8rem);
  line-height: 1.4;
  color: var(--paper);
}

.page-about .ab-partners__lead {
  margin: 0.85rem 0 0;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--muted);
  max-width: 48ch;
}

.page-about .ab-partners__panel {
  padding: 1.3rem 1.2rem;
  background: rgba(11, 58, 46, 0.62);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-l);
}

.page-about .ab-partners__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--cyan-soft);
}

.page-about .ab-chips {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-about .ab-chips li {
  padding: 0.3rem 0.65rem;
  font-size: 0.82rem;
  color: var(--paper);
  border: 1px solid var(--cyan);
  border-radius: 999px;
}

.page-about .ab-partners__note {
  margin: 1rem 0 0;
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--muted-2);
}

/* 06 指标 */
.page-about .ab-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-metric {
  padding: 1.15rem 1rem;
  background: var(--ink-800);
}

.page-about .ab-metric__num {
  margin: 0;
  font-size: clamp(1.6rem, 4.4vw, 2.4rem);
  line-height: 1.05;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .ab-metric__num span {
  font-size: 0.55em;
  vertical-align: super;
}

.page-about .ab-metric__label {
  margin: 0.45rem 0 0;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-about .ab-metric__mean {
  margin: 0.55rem 0 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--muted-2);
}

/* 07 往后 */
.page-about .ab-next__grid {
  gap: 1rem;
}

.page-about .ab-next__item {
  padding: 1.1rem 0 0;
  border-top: 2px solid var(--cyan);
}

.page-about .ab-next__item h3 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .ab-next__item p {
  margin: 0.5rem 0 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .ab-links {
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
  padding-top: 1.35rem;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 0.9rem;
}

.page-about .ab-links__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  color: var(--cyan-soft);
}

.page-about .ab-links ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-about .ab-links a {
  display: inline-block;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid var(--line-soft);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .ab-links a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .ab-links a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

@media (min-width: 720px) {
  .page-about .ab-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.1rem;
  }

  .page-about .ab-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-check__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-links {
    grid-template-columns: 14rem minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-links ul {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.7rem 1.5rem;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
    gap: clamp(1.5rem, 4vw, 3rem);
  }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(1.5rem, 4vw, 3rem);
  }

  .page-about .ab-partners__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: start;
  }

  .page-about .ab-check__grid {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: start;
  }

  .page-about .ab-lanes {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 0;
    position: relative;
  }

  .page-about .ab-lanes::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 0.5rem;
    bottom: 0.5rem;
    width: 1px;
    background: repeating-linear-gradient(
      to bottom,
      var(--line-soft) 0,
      var(--line-soft) 6px,
      transparent 6px,
      transparent 12px
    );
  }

  .page-about .ab-lane {
    border-radius: 0;
    border-left: 0;
    border-right: 0;
  }

  .page-about .ab-lane--tool {
    padding-right: 2.5rem;
    padding-left: 0;
  }

  .page-about .ab-lane--collect {
    padding-left: 2.5rem;
    padding-right: 0;
  }
}
</｜｜DSML｜｜ parameter>
</result>