.page-about .breadcrumb {
  margin: 24px 0 20px;
  font-size: 13px;
}

.page-about .ab-hero {
  display: grid;
  gap: 32px;
  padding-bottom: 8px;
}

.page-about .ab-hero-copy h1 {
  margin: 12px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 5.6vw, 3.3rem);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--white-100);
  max-width: 15em;
}

.page-about .ab-lede {
  margin: 0 0 24px;
  font-size: 16px;
  line-height: 1.78;
  color: var(--grey-400);
  max-width: 40em;
}

.page-about .ab-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 30px;
}

.page-about .ab-hero-marks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  border-top: 1px solid var(--line-soft);
  padding-top: 20px;
}

.page-about .ab-hero-marks li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
}

.page-about .ab-mark-num {
  font-family: var(--font-mono);
  font-size: 22px;
  letter-spacing: 0.02em;
  color: var(--green-500);
}

.page-about .ab-mark-txt {
  font-size: 13px;
  color: var(--grey-400);
}

.page-about .ab-fig {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background:
    radial-gradient(circle at 18% 12%, rgba(43, 224, 166, 0.14), transparent 55%),
    linear-gradient(150deg, var(--blue-700), var(--blue-900));
  box-shadow: var(--shadow-lift);
}

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

.page-about .ab-fig figcaption {
  padding: 12px 18px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--grey-400);
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-section {
  margin-top: 72px;
}

.page-about .ab-sub {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--grey-400);
  max-width: 46em;
}

/* 档案卡 */
.page-about .ab-files {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 28px;
}

.page-about .ab-file {
  position: relative;
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--glass-04);
  overflow: hidden;
}

.page-about .ab-file::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(to bottom, var(--green-500), transparent 85%);
  opacity: 0.7;
}

.page-about .ab-file-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan-400);
  margin-bottom: 10px;
}

.page-about .ab-file h3 {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.4;
  color: var(--white-100);
}

.page-about .ab-file p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--grey-400);
}

/* 五段方法 */
.page-about .ab-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .ab-step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-step-no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--green-500);
  padding-top: 3px;
}

.page-about .ab-step-body h3 {
  margin: 0 0 6px;
  font-size: 17px;
  color: var(--white-100);
}

.page-about .ab-step-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--grey-400);
}

.page-about .ab-step-out {
  grid-column: 2;
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--white-100);
  padding: 10px 14px;
  border-radius: var(--r-sm);
  background: var(--glass-08);
  border: 1px dashed var(--line);
}

.page-about .ab-step-out span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--orange-500);
  margin-right: 8px;
}

/* 版本演进（浅色区块） */
.page-about .ab-versions {
  margin-top: 72px;
  padding: clamp(24px, 4.5vw, 48px);
  border-radius: var(--r-lg);
  background:
    linear-gradient(135deg, rgba(56, 217, 255, 0.16), transparent 60%),
    var(--warm-050);
  color: var(--blue-900);
}

.page-about .ab-versions .eyebrow {
  color: var(--blue-700);
}

.page-about .ab-versions h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--blue-900);
}

.page-about .ab-versions .ab-sub {
  color: #3b5068;
}

.page-about .ab-fig--ver {
  margin: 24px 0 20px;
  background: var(--blue-700);
  box-shadow: none;
}

.page-about .ab-fig--ver figcaption {
  color: var(--white-100);
  background: var(--blue-900);
  border-top-color: rgba(234, 242, 250, 0.12);
}

.page-about .ab-ver-track {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .ab-ver-node {
  border: 1px solid rgba(11, 37, 69, 0.16);
  border-radius: var(--r-md);
  background: #ffffff;
  padding: 14px 16px;
}

.page-about .ab-ver-node[open] {
  border-color: var(--green-700);
  box-shadow: 0 14px 30px -26px rgba(11, 37, 69, 0.9);
}

.page-about .ab-ver-node summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 10px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-ver-node summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-ver-node summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--green-700);
}

.page-about .ab-ver-node[open] summary::after {
  content: "−";
}

.page-about .ab-ver-code {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--blue-900);
}

.page-about .ab-ver-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--blue-700);
}

.page-about .ab-ver-node p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: #3b5068;
}

.page-about .ab-versions .tag {
  font-size: 11px;
  border: 1px solid transparent;
  background: rgba(124, 92, 255, 0.14);
  color: #4b32b8;
}

.page-about .ab-versions .tag--green {
  background: rgba(14, 159, 116, 0.16);
  color: #0a6b4f;
}

.page-about .ab-versions .tag--orange {
  background: rgba(255, 138, 61, 0.2);
  color: #9c4a10;
}

/* 团队 */
.page-about .ab-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  margin-top: 72px;
}

.page-about .ab-fig--team {
  box-shadow: none;
}

.page-about .ab-team-copy h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  line-height: 1.25;
  color: var(--white-100);
}

.page-about .ab-roles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 22px;
}

.page-about .ab-role {
  padding: 16px 16px 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--glass-04);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .ab-role:hover,
.page-about .ab-role:focus-within {
  border-color: var(--green-500);
  background: var(--glass-08);
}

.page-about .ab-role h3 {
  margin: 0 0 6px;
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 16px;
  color: var(--white-100);
}

.page-about .ab-role-num {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--green-500);
}

.page-about .ab-role p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--grey-400);
}

.page-about .ab-role:hover p {
  color: var(--white-100);
}

.page-about .ab-team-note {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--grey-400);
  padding-left: 14px;
  border-left: 2px solid var(--violet-500);
}

/* 场景 */
.page-about .ab-scene-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 26px;
}

.page-about .ab-scene-col {
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    linear-gradient(160deg, rgba(43, 224, 166, 0.08), transparent 55%),
    var(--glass-04);
  min-width: 0;
}

.page-about .ab-scene-h {
  margin: 0 0 16px;
  font-size: 17px;
  color: var(--white-100);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .ab-scene-h span {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--cyan-400);
}

.page-about .ab-scene-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-scene-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--grey-400);
}

.page-about .ab-scene-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green-500);
}

.page-about .ab-scene-link {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 217, 255, 0.4);
  padding-bottom: 2px;
}

.page-about .ab-scene-link:hover {
  color: var(--green-500);
  border-bottom-color: var(--green-500);
}

.page-about .ab-industries {
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-ind-label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--grey-400);
}

.page-about .ab-ind-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-ind-list li {
  padding: 6px 14px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  font-size: 13px;
  color: var(--white-100);
  background: var(--glass-04);
}

/* 生态与资质 */
.page-about .ab-eco {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 72px;
  padding: clamp(22px, 4vw, 40px);
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 88% 8%, rgba(124, 92, 255, 0.22), transparent 58%),
    var(--blue-700);
}

.page-about .ab-eco-main h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.2vw, 1.9rem);
  line-height: 1.26;
  color: var(--white-100);
}

.page-about .ab-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.page-about .ab-eco-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .ab-eco-side {
  padding: 20px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-soft);
  background: rgba(6, 20, 38, 0.55);
}

.page-about .ab-eco-side h3 {
  margin: 0 0 14px;
  font-size: 15px;
  color: var(--white-100);
}

.page-about .ab-eco-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-eco-links a {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--cyan-400);
  text-decoration: none;
}

.page-about .ab-eco-links a:hover {
  color: var(--green-500);
}

.page-about .ab-eco-links li {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-eco-links li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .ab-eco-note {
  margin: 16px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--grey-400);
}

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

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

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

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

@media (min-width: 900px) {
  .page-about .ab-hero {
    grid-template-columns: 1.08fr 0.92fr;
    align-items: center;
    gap: 52px;
    margin-top: 12px;
  }

  .page-about .ab-hero-copy h1 {
    max-width: 12em;
  }

  .page-about .ab-step {
    grid-template-columns: 64px minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 22px;
    align-items: start;
    padding: 26px 0;
  }

  .page-about .ab-step-out {
    grid-column: 3;
    margin-top: 0;
  }

  .page-about .ab-team {
    grid-template-columns: 0.85fr 1.15fr;
    align-items: start;
    gap: 44px;
  }

  .page-about .ab-scene-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .ab-eco {
    grid-template-columns: 1.4fr 0.9fr;
    gap: 32px;
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-about .ab-files {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .ab-section {
    margin-top: 88px;
  }

  .page-about .ab-versions,
  .page-about .ab-team,
  .page-about .ab-eco {
    margin-top: 88px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-role {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>