.page-about {
  background: var(--ink);
  color: var(--mist);
  font-family: var(--font-body);
  padding-bottom: clamp(40px, 7vw, 96px);
  overflow-x: hidden;
}

.page-about .about-crumb {
  padding-top: clamp(14px, 3vw, 26px);
}

.page-about .about-crumb .breadcrumb {
  color: var(--steel);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .about-crumb .breadcrumb a {
  color: var(--steel);
  text-decoration: none;
}

.page-about .about-crumb .breadcrumb a:hover,
.page-about .about-crumb .breadcrumb a:focus-visible {
  color: var(--amber);
}

/* 首屏 */
.page-about .about-hero {
  padding: clamp(24px, 5vw, 56px) 0 clamp(32px, 6vw, 72px);
  position: relative;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-strong), transparent);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-hero__main h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 6.4vw, 66px);
  line-height: 1.06;
  letter-spacing: 0.01em;
  margin: 14px 0 0;
  color: var(--mist);
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 40em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: rgba(216, 226, 232, 0.86);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__plate {
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 2px solid var(--amber);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3.4vw, 30px);
}

.page-about .about-plate__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
  margin: 0 0 16px;
}

.page-about .about-stats {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-about .about-stats__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-stats__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-stats dt {
  font-size: 13px;
  color: var(--steel);
  letter-spacing: 0.04em;
}

.page-about .about-stats dd {
  margin: 0;
  font-size: 13px;
  color: var(--mist);
  text-align: right;
}

.page-about .about-stats__num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--amber);
  margin-right: 4px;
}

/* 章节标题 */
.page-about .about-head {
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-about .about-head__index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--amber);
  border-top: 1px solid var(--amber-dim);
  padding-top: 8px;
}

.page-about .about-head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 3.8vw, 38px);
  line-height: 1.16;
  margin: 10px 0 0;
  color: var(--mist);
}

.page-about .about-head__note {
  margin: 12px 0 0;
  max-width: 46em;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--steel);
}

/* 缘起 */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-origin__text p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(216, 226, 232, 0.88);
  max-width: 34em;
}

.page-about .about-origin__text p strong {
  color: var(--amber);
  font-weight: 600;
}

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

.page-about .about-figure__frame {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--teal);
}

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

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--steel);
  border-left: 1px solid var(--amber-dim);
  padding-left: 10px;
}

/* 时间线 */
.page-about .about-timeline {
  background: linear-gradient(180deg, rgba(33, 26, 60, 0.42), rgba(6, 24, 38, 0) 62%);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-timeline__body {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}

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

.page-about .about-years__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--steel);
  text-decoration: none;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-about .about-years__link:hover,
.page-about .about-years__link:focus-visible {
  color: var(--ink);
  background: var(--amber);
  border-color: var(--amber);
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.page-about .about-track {
  position: relative;
  border-left: 1px solid var(--line-strong);
  padding-left: clamp(18px, 3vw, 30px);
  display: grid;
  gap: 6px;
}

.page-about .about-milestone {
  position: relative;
  padding: 16px 0 18px;
  border-bottom: 1px dashed var(--line);
}

.page-about .about-milestone:last-child {
  border-bottom: 0;
}

.page-about .about-milestone::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(18px, 3vw, 30px) - 4px);
  top: 24px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--steel);
  transition: background-color 160ms var(--ease), box-shadow 160ms var(--ease);
}

.page-about .about-milestone:hover::before,
.page-about .about-milestone:target::before {
  background: var(--amber);
  box-shadow: 0 0 0 4px var(--amber-dim);
}

.page-about .about-milestone__year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--amber);
  margin: 0 0 6px;
}

.page-about .about-milestone h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--mist);
}

.page-about .about-milestone p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(216, 226, 232, 0.8);
  max-width: 42em;
}

.page-about .about-milestone:target {
  background: rgba(243, 179, 61, 0.06);
  border-radius: var(--radius);
}

/* 团队 */
.page-about .about-team__layout {
  display: grid;
  gap: clamp(22px, 3.6vw, 40px);
  align-items: start;
}

.page-about .about-team__list {
  display: grid;
  gap: 12px;
}

.page-about .about-role {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(10, 44, 58, 0.55);
  transition: border-color 160ms var(--ease), background-color 160ms var(--ease);
}

.page-about .about-role[open] {
  border-color: rgba(243, 179, 61, 0.42);
  background: rgba(10, 44, 58, 0.82);
}

.page-about .about-role__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-role__summary::-webkit-details-marker {
  display: none;
}

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

.page-about .about-role__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber);
  border: 1px solid var(--amber-dim);
  border-radius: 3px;
  padding: 2px 6px;
}

.page-about .about-role__name {
  font-size: 16px;
  font-weight: 600;
  color: var(--mist);
  flex: 1 1 auto;
}

.page-about .about-role__count {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--status);
  letter-spacing: 0.06em;
}

.page-about .about-role__body {
  padding: 0 18px 18px;
}

.page-about .about-role__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(216, 226, 232, 0.82);
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.page-about .about-figure--square .about-figure__frame {
  border-color: var(--line-strong);
}

/* 方法 */
.page-about .about-method {
  background: linear-gradient(160deg, rgba(59, 22, 38, 0.55), rgba(6, 24, 38, 0.9));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-method__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-method__lead {
  margin: 0 0 22px;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(216, 226, 232, 0.88);
  max-width: 32em;
}

.page-about .about-note-list {
  margin: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-note {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-note dt {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--amber);
  margin-bottom: 6px;
}

.page-about .about-note dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(216, 226, 232, 0.82);
  max-width: 38em;
}

/* 服务覆盖 */
.page-about .about-scenes {
  display: grid;
  gap: 14px;
}

.page-about .about-scene {
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3.2vw, 28px);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-scene--teal {
  background: linear-gradient(155deg, rgba(10, 44, 58, 0.95), rgba(6, 24, 38, 0.85));
  border-left: 3px solid var(--status);
}

.page-about .about-scene--indigo {
  background: linear-gradient(155deg, rgba(33, 26, 60, 0.95), rgba(6, 24, 38, 0.85));
  border-left: 3px solid var(--amber);
}

.page-about .about-scene--wine {
  background: linear-gradient(155deg, rgba(59, 22, 38, 0.92), rgba(6, 24, 38, 0.85));
  border-left: 3px solid var(--signal);
}

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

.page-about .about-scene h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--mist);
}

.page-about .about-scene p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(216, 226, 232, 0.82);
  flex: 1 1 auto;
}

.page-about .about-scene__link {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid var(--amber-dim);
  padding-bottom: 2px;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .about-scene__link:hover,
.page-about .about-scene__link:focus-visible {
  color: var(--signal);
  border-color: var(--signal);
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

/* 伙伴与荣誉 */
.page-about .about-partners__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-about .about-partners__text p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(216, 226, 232, 0.86);
  max-width: 36em;
}

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

.page-about .about-network {
  position: relative;
  min-height: 240px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 100% 40px,
    linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 40px 100%,
    linear-gradient(150deg, rgba(10, 44, 58, 0.9), rgba(33, 26, 60, 0.85));
  overflow: hidden;
}

.page-about .about-network__hub {
  position: absolute;
  left: 50%;
  top: 44%;
  transform: translate(-50%, -50%);
  width: 72px;
  height: 72px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
  background: var(--amber);
  box-shadow: 0 0 0 8px var(--amber-dim);
}

.page-about .about-network__node {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
  padding: 5px 9px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(6, 24, 38, 0.82);
}

.page-about .about-network__node--a {
  left: 8%;
  top: 16%;
  border-color: var(--amber-dim);
}

.page-about .about-network__node--b {
  right: 9%;
  top: 24%;
  border-color: rgba(47, 163, 138, 0.5);
}

.page-about .about-network__node--c {
  left: 14%;
  bottom: 16%;
  border-color: rgba(255, 107, 53, 0.5);
}

.page-about .about-network__node--d {
  right: 12%;
  bottom: 22%;
  border-color: var(--line-strong);
}

.page-about .about-network__caption {
  position: absolute;
  left: 50%;
  bottom: 12px;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--steel);
  white-space: nowrap;
}

.page-about .about-honors {
  list-style: none;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-honor {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-honor__year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--amber);
  min-width: 56px;
}

.page-about .about-honor__name {
  font-size: 15px;
  color: var(--mist);
}

/* 联系收束 */
.page-about .about-cta {
  padding-top: clamp(30px, 5vw, 56px);
}

.page-about .about-cta__inner {
  border-top: 1px solid var(--line-strong);
  padding-top: clamp(24px, 4vw, 40px);
  display: grid;
  gap: clamp(22px, 3.6vw, 40px);
  align-items: start;
}

.page-about .about-cta h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 3.8vw, 38px);
  line-height: 1.16;
  margin: 10px 0 14px;
  color: var(--mist);
}

.page-about .about-cta__text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(216, 226, 232, 0.84);
  max-width: 36em;
}

.page-about .about-cta__contact {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 2;
  color: var(--steel);
  border-left: 2px solid var(--amber-dim);
  padding-left: 14px;
}

.page-about .about-cta__contact a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 160ms var(--ease);
}

.page-about .about-cta__contact a:hover,
.page-about .about-cta__contact a:focus-visible {
  border-color: var(--amber);
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

@media (min-width: 720px) {
  .page-about .about-scenes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-scenes .about-scene:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(280px, 0.75fr);
    align-items: start;
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  }

  .page-about .about-timeline__body {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-years ol {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 4px;
    position: sticky;
    top: 104px;
  }

  .page-about .about-years__link {
    border-radius: 4px;
    border-color: transparent;
    border-left: 2px solid var(--line-strong);
    padding: 8px 10px;
    width: 100%;
  }

  .page-about .about-years__link:hover,
  .page-about .about-years__link:focus-visible {
    border-left-color: var(--amber);
    background: rgba(243, 179, 61, 0.1);
    color: var(--amber);
  }

  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 1.35fr) minmax(240px, 0.65fr);
  }

  .page-about .about-method__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }

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

  .page-about .about-scenes .about-scene:first-child {
    grid-column: auto;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(220px, 0.7fr);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-years__link,
  .page-about .about-milestone::before,
  .page-about .about-role,
  .page-about .about-scene__link,
  .page-about .about-cta__contact a {
    transition: none;
  }
}
<<<END>>>