.page-about {
  --about-shell-gap: clamp(28px, 5vw, 68px);
  --about-sec-pad: clamp(28px, 4.4vw, 52px);
  --about-soft: rgba(16, 32, 43, 0.06);
  padding-bottom: clamp(44px, 7vw, 96px);
}

.page-about .about-intro {
  padding: clamp(18px, 3vw, 34px) 0 clamp(30px, 5vw, 58px);
}

.page-about .about-intro h1 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 6vw, 60px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  max-width: 22em;
  color: var(--ink);
}

.page-about .about-lead {
  margin: 20px 0 0;
  max-width: 46em;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--ink-2);
}

.page-about .about-lead--sub {
  margin-top: 12px;
  font-size: clamp(15px, 1.4vw, 16px);
  color: var(--ink-2);
}

.page-about .about-rail {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(22px, 3.4vw, 34px);
}

.page-about .rail-link {
  display: inline-flex;
  align-items: center;
  padding: 11px 20px;
  border-radius: var(--radius-pill);
  background: var(--paper-2);
  border: 1px solid transparent;
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background 180ms var(--ease), border-color 180ms var(--ease), color 180ms var(--ease);
}

.page-about .rail-link:hover,
.page-about .rail-link:focus-visible {
  background: var(--green-soft);
  border-color: var(--green);
  color: var(--green-dark);
}

.page-about .rail-link--primary {
  background: var(--green);
  color: #fff;
}

.page-about .rail-link--primary:hover,
.page-about .rail-link--primary:focus-visible {
  background: var(--green-dark);
  border-color: var(--green-dark);
  color: #fff;
}

.page-about .about-shell {
  display: grid;
  gap: var(--about-shell-gap);
}

.page-about .about-index {
  border-top: 2px solid var(--ink);
  padding-top: 14px;
}

.page-about .index-cap {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.page-about .index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.page-about .index-list a {
  display: flex;
  gap: 9px;
  align-items: baseline;
  padding: 9px 8px 9px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .index-list a span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--green);
}

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

.page-about .about-body {
  min-width: 0;
}

.page-about .about-sec {
  padding: var(--about-sec-pad) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 108px;
}

.page-about .about-sec:first-child {
  border-top: none;
  padding-top: 0;
}

.page-about .sec-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.page-about .sec-num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 44px);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.03em;
  color: var(--green);
}

.page-about .sec-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(23px, 3.4vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .sec-body {
  margin-top: 18px;
}

.page-about .sec-body p {
  margin: 0 0 14px;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: var(--ink-2);
  max-width: 36em;
}

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

.page-about .sec-body a {
  color: var(--green-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .sec-foot {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line-strong);
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-2);
}

/* 深色控制台面板 */
.page-about .about-sec--dark {
  background: linear-gradient(150deg, var(--navy) 0%, var(--navy-2) 62%, var(--panel) 100%);
  border-top-color: transparent;
  border-radius: var(--radius-lg);
  padding-inline: clamp(18px, 3.6vw, 40px);
  color: #E9F1EC;
}

.page-about .about-sec--dark .sec-title {
  color: #F4F7F2;
}

.page-about .about-sec--dark .sec-num {
  color: var(--lime);
}

.page-about .about-sec--dark .sec-lead {
  color: rgba(233, 241, 236, 0.86);
  font-size: clamp(15px, 1.6vw, 17px);
  max-width: 32em;
}

.page-about .mod-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .mod-item {
  padding: 15px 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.05);
  border-left: 3px solid var(--green);
  transition: background 180ms var(--ease);
}

.page-about .mod-item:hover {
  background: rgba(255, 255, 255, 0.09);
}

.page-about .mod-name {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--lime);
}

.page-about .mod-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(233, 241, 236, 0.76);
  max-width: 40em;
}

.page-about .about-sec--dark .sec-foot {
  border-top-color: rgba(255, 255, 255, 0.18);
  color: rgba(233, 241, 236, 0.7);
}

/* 图文分栏 */
.page-about .split {
  display: grid;
  gap: 22px;
  margin-top: 18px;
}

.page-about .split-text p {
  margin: 0 0 13px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-2);
}

.page-about .split-text strong {
  color: var(--ink);
  font-weight: 700;
}

.page-about .about-figure {
  margin: 0;
  overflow: hidden;
  background: var(--paper-2);
  border-radius: var(--radius-md);
}

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

.page-about .about-figure--cut {
  border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) 80px;
}

.page-about .about-figure--wide {
  margin-top: 26px;
  border-radius: var(--radius-lg);
}

.page-about .about-figure--square {
  border-radius: 80px var(--radius-md) var(--radius-md) var(--radius-md);
}

/* 时间线 */
.page-about .timeline {
  list-style: none;
  margin: 24px 0 0;
  padding: 0 0 0 28px;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--green) 0%, var(--green) 45%, var(--orange) 100%);
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 24px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px var(--paper);
}

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

.page-about .tl-year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .tl-title {
  margin: 6px 0 6px;
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
  color: var(--ink);
  line-height: 1.45;
}

.page-about .tl-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-2);
  max-width: 36em;
}

/* 规模数据 */
.page-about .stat-grid {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .stat {
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: var(--paper-2);
  border-top: 2px solid var(--green);
}

.page-about .stat--dark {
  background: var(--navy);
  border-top-color: var(--lime);
}

.page-about .stat--dark .stat-num {
  color: var(--lime);
}

.page-about .stat--dark .stat-label {
  color: rgba(233, 241, 236, 0.72);
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(21px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--green-dark);
}

.page-about .stat-label {
  display: block;
  margin-top: 7px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-2);
}

.page-about .scale-split {
  display: grid;
  gap: 20px;
  margin-top: 24px;
}

/* 来源步骤 */
.page-about .src-list {
  list-style: none;
  counter-reset: src;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .src-list li {
  position: relative;
  counter-increment: src;
  padding: 14px 18px 14px 48px;
  border-radius: var(--radius-md);
  background: var(--paper-2);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-2);
}

.page-about .src-list li::before {
  content: counter(src, decimal-leading-zero);
  position: absolute;
  left: 17px;
  top: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--orange);
}

/* 结尾引导 */
.page-about .about-cta {
  margin-top: clamp(34px, 5vw, 60px);
  padding: clamp(24px, 3.6vw, 40px);
  border-radius: var(--radius-lg);
  background: linear-gradient(120deg, var(--green-soft) 0%, var(--paper-2) 55%, #E4EFE0 100%);
  display: grid;
  gap: 20px;
}

.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.2vw, 32px);
  line-height: 1.24;
  color: var(--ink);
}

.page-about .cta-text p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-2);
  max-width: 34em;
}

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

.page-about .cta-actions .btn {
  text-decoration: none;
}

@media (min-width: 640px) {
  .page-about .index-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .stat-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .mod-item:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 860px) {
  .page-about .split {
    grid-template-columns: 1.02fr 0.98fr;
    align-items: center;
    gap: clamp(24px, 3.4vw, 44px);
  }

  .page-about .scale-split {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
    gap: clamp(24px, 3.4vw, 44px);
  }

  .page-about .about-cta {
    grid-template-columns: 1fr auto;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-about .about-shell {
    grid-template-columns: minmax(170px, 214px) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 92px;
  }

  .page-about .index-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .page-about .about-sec {
    padding-inline-start: clamp(0px, 1.4vw, 20px);
  }
}
</｜｜DSML｜｜ parameter>
</result>