.page-about {
  --about-rail-w: 6.5rem;
  --about-dot: 7px;
  display: block;
  color: var(--cream);
  background:
    radial-gradient(120% 60% at 82% 0%, rgba(95, 242, 214, 0.08), transparent 62%),
    linear-gradient(180deg, var(--ink-night) 0%, var(--ink-night) 38%, var(--ink-deep) 76%, var(--ink-deep) 100%);
  overflow-x: hidden;
}

/* 面包屑 */
.page-about .about-crumbs {
  padding-top: clamp(16px, 3vw, 30px);
}

.page-about .about-crumbs .crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--stone);
}

.page-about .about-crumbs .crumbs li + li::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--stone);
}

.page-about .about-crumbs .crumbs a {
  color: var(--mist);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-about .about-crumbs .crumbs a:hover,
.page-about .about-crumbs .crumbs a:focus-visible {
  color: var(--cyan);
}

/* 首屏 */
.page-about .about-hero {
  padding: clamp(22px, 4vw, 48px) 0 clamp(40px, 6vw, 84px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
}

.page-about .about-rail {
  padding-left: 0.9rem;
  border-left: 1px solid var(--hairline-strong);
}

.page-about .about-rail .annotation {
  margin: 0 0 0.65rem;
}

.page-about .about-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--stone);
}

.page-about .about-rail__list li {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.page-about .about-rail__dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--moss);
}

.page-about .about-hero__note {
  display: none;
}

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

.page-about .about-hero__main .eyebrow {
  margin: 0 0 0.7rem;
}

.page-about .about-hero__title {
  margin: 0;
  max-width: 24ch;
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-about .about-hero__lead {
  margin: clamp(16px, 2.6vw, 26px) 0 0;
  max-width: 62ch;
  font-size: clamp(0.98rem, 1.5vw, 1.08rem);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(24px, 4vw, 42px) 0 0;
  border: 1px solid var(--hairline);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--hairline);
}

.page-about .about-stats__item {
  padding: 0.9rem 1rem 1rem;
  background: rgba(11, 27, 43, 0.82);
}

.page-about .about-stats dt {
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-stats dd {
  margin: 0.4rem 0 0;
  font-size: 0.95rem;
  color: var(--cream);
}

.page-about .about-stats .num {
  display: inline-block;
  margin-right: 0.2rem;
  font-size: 1.85rem;
  line-height: 1;
  color: var(--cyan);
}

/* 章节标题组 */
.page-about .about-head {
  display: grid;
  gap: 0.6rem;
  max-width: 48rem;
  margin-bottom: clamp(24px, 4vw, 46px);
}

.page-about .about-head .eyebrow {
  margin: 0;
}

.page-about .about-head h2 {
  margin: 0;
  font-size: clamp(1.5rem, 3.4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.012em;
  color: var(--cream);
}

.page-about .about-head__lead {
  margin: 0;
  max-width: 62ch;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-head__lead a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-about .about-head__lead a:hover {
  color: var(--amber);
}

/* 运营历程 */
.page-about .about-history {
  padding: clamp(36px, 6vw, 78px) 0;
}

.page-about .about-history__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.5vw, 44px);
}

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

.page-about .about-history__figure img,
.page-about .about-team__figure img,
.page-about .about-network__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-timeline {
  display: grid;
  gap: 0.55rem;
  padding-left: clamp(14px, 2.6vw, 26px);
  border-left: 1px solid var(--hairline-strong);
}

.page-about .about-timeline__item {
  position: relative;
  border-radius: var(--radius-md);
  background: rgba(18, 53, 46, 0.5);
  transition: background var(--dur) var(--ease);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: 1.4rem;
  left: calc(-1 * clamp(14px, 2.6vw, 26px) - 4px);
  width: var(--about-dot);
  height: var(--about-dot);
  border-radius: 50%;
  background: var(--moss);
  transition: background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-timeline__item[data-open]::before {
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(95, 242, 214, 0.16);
}

.page-about .about-timeline__head {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  width: 100%;
  padding: 0.85rem 1rem;
  border: 0;
  border-radius: var(--radius-md);
  background: none;
  color: var(--cream);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background var(--dur) var(--ease);
}

.page-about .about-timeline__head:hover,
.page-about .about-timeline__head:focus-visible {
  background: rgba(95, 242, 214, 0.08);
}

.page-about .about-timeline__ver {
  flex: 0 0 auto;
  font-size: 0.92rem;
  color: var(--cyan);
}

.page-about .about-timeline__name {
  flex: 1 1 auto;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.page-about .about-timeline__item[data-open] .about-timeline__head {
  background: rgba(95, 242, 214, 0.06);
}

.page-about .about-timeline__item .fold__body {
  padding: 0 1rem 1rem 2.7rem;
}

.page-about .about-timeline__item .fold__body p {
  margin: 0 0 0.65rem;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-timeline__item .fold__body p:last-child {
  margin-bottom: 0;
}

/* 分区原则 */
.page-about .about-split {
  padding: clamp(36px, 6vw, 78px) 0;
  background: linear-gradient(180deg, rgba(14, 42, 36, 0) 0%, rgba(14, 42, 36, 0.78) 16%, rgba(14, 42, 36, 0.78) 84%, rgba(14, 42, 36, 0) 100%);
}

.page-about .about-split__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 2.4vw, 22px);
}

.page-about .about-split__col {
  padding: clamp(18px, 2.6vw, 28px);
  border-radius: var(--radius-lg);
  border-top: 3px solid var(--mist);
  background: rgba(7, 18, 29, 0.62);
}

.page-about .about-split__col--board {
  border-top-color: var(--amber);
}

.page-about .about-split__col--report {
  border-top-color: var(--cyan);
}

.page-about .about-split__col--team {
  border-top-color: var(--clay);
}

.page-about .about-split__col .pill {
  margin-bottom: 0.8rem;
}

.page-about .about-split__col h3 {
  margin: 0 0 0.6rem;
  font-size: 1.22rem;
  font-weight: 700;
  color: var(--cream);
}

.page-about .about-split__col p {
  margin: 0 0 0.6rem;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-split__meta {
  display: block;
  margin-top: 1rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--stone);
}

/* 团队与更新 */
.page-about .about-team {
  padding: clamp(36px, 6vw, 78px) 0;
  margin: clamp(10px, 2vw, 22px) 0;
  border-radius: clamp(28px, 5vw, 56px);
  background: linear-gradient(180deg, rgba(18, 53, 46, 0.55) 0%, rgba(11, 27, 43, 0.25) 100%);
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-roles {
  display: grid;
  gap: 0.85rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-roles li {
  display: flex;
  align-items: flex-start;
  gap: clamp(14px, 2vw, 22px);
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--hairline);
}

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

.page-about .about-roles__num {
  flex: 0 0 auto;
  min-width: 2.6rem;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  line-height: 1;
  color: var(--amber);
}

.page-about .about-roles h3 {
  margin: 0 0 0.3rem;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--cream);
}

.page-about .about-roles p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--mist);
}

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

.page-about .about-cadence {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(26px, 4vw, 48px);
  border: 1px solid var(--hairline);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--hairline);
}

.page-about .about-cadence > div {
  padding: clamp(16px, 2.4vw, 26px);
  background: rgba(7, 18, 29, 0.72);
}

.page-about .about-cadence__k {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .about-cadence__v {
  display: block;
  margin-top: 0.4rem;
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 2.6vw, 1.7rem);
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-cadence p {
  margin: 0.5rem 0 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--mist);
}

/* 覆盖与合作 */
.page-about .about-network {
  padding: clamp(36px, 6vw, 78px) 0;
}

.page-about .about-network__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.5vw, 44px);
  align-items: center;
}

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

.page-about .about-network__stats {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-network__stats li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--hairline);
}

.page-about .about-network__label {
  font-size: 0.9rem;
  color: var(--mist);
}

.page-about .about-network__num {
  font-size: 1.45rem;
  line-height: 1;
  color: var(--cream);
}

.page-about .about-network__note {
  max-width: 68ch;
  margin: clamp(24px, 4vw, 42px) 0 0;
  padding-left: clamp(14px, 2vw, 20px);
  border-left: 2px solid var(--moss);
  font-size: 0.93rem;
  line-height: 1.85;
  color: var(--mist);
}

/* 联系入口 */
.page-about .about-contact {
  padding: clamp(36px, 6vw, 78px) 0 clamp(48px, 7vw, 92px);
}

.page-about .about-contact__panel {
  padding: clamp(24px, 4.5vw, 56px);
  border: 1px solid var(--hairline-strong);
  border-radius: clamp(24px, 4vw, 42px);
  background:
    radial-gradient(120% 140% at 10% 0%, rgba(95, 242, 214, 0.13), transparent 58%),
    linear-gradient(140deg, var(--ink-footer) 0%, var(--ink-deep) 100%);
}

.page-about .about-contact__panel h2 {
  margin: 0;
  max-width: 26ch;
  font-size: clamp(1.45rem, 3.2vw, 2.3rem);
  font-weight: 800;
  line-height: 1.26;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .about-contact__text {
  max-width: 60ch;
  margin: clamp(14px, 2vw, 20px) 0 0;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-contact__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
  margin: clamp(20px, 3vw, 34px) 0;
  padding: 0;
  list-style: none;
}

.page-about .about-contact__list li {
  display: grid;
  gap: 0.2rem;
  padding-left: 0.9rem;
  border-left: 2px solid var(--moss);
}

.page-about .about-contact__list strong {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--stone);
}

.page-about .about-contact__list span {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--cream);
  word-break: break-word;
}

.page-about .about-contact__list .num {
  font-size: 1rem;
  color: var(--amber);
}

.page-about .about-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* 平板与桌面 */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr) 3.5rem;
    align-items: start;
    column-gap: clamp(24px, 3vw, 48px);
  }

  .page-about .about-rail {
    padding-left: 0;
    padding-top: 0.9rem;
    border-left: 0;
    border-top: 1px solid var(--hairline-strong);
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 1rem;
  }

  .page-about .about-hero__note {
    display: block;
    justify-self: end;
  }

  .page-about .about-history__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
    align-items: start;
  }

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

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-about .about-network__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-timeline__item,
  .page-about .about-timeline__head,
  .page-about .about-timeline__item::before,
  .page-about .about-crumbs .crumbs a {
    transition: none;
  }
}
<<<END>>>