.page-about {
  --about-hair: rgba(155, 179, 200, 0.18);
  --about-gold-line: rgba(216, 168, 78, 0.38);
  --about-card-bg: rgba(13, 42, 68, 0.62);
  color: var(--fog);
  background: var(--ink-900);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin: 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(20px, 4vw, 34px) 0 clamp(44px, 8vw, 84px);
  background:
    radial-gradient(58% 52% at 84% 6%, rgba(53, 224, 208, 0.1), transparent 72%),
    radial-gradient(50% 50% at 6% 0%, rgba(216, 168, 78, 0.13), transparent 74%),
    var(--ink-900);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 5vw, 44px);
  margin-top: clamp(18px, 3vw, 30px);
}

.page-about .about-kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-about .about-kicker__mark {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-900);
  background: var(--gold);
  border-radius: 999px;
  padding: 4px 10px;
}

.page-about h1 {
  font-size: clamp(32px, 7.4vw, 62px);
  line-height: 1.08;
  color: var(--fog);
  max-width: 15ch;
}

.page-about h1::after {
  content: "";
  display: block;
  width: 72px;
  height: 3px;
  margin-top: 22px;
  background: linear-gradient(90deg, var(--gold), rgba(216, 168, 78, 0));
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: rgba(234, 241, 245, 0.84);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  max-width: 540px;
}

.page-about .about-hero__facts li {
  border-left: 2px solid var(--about-gold-line);
  padding: 2px 0 2px 12px;
}

.page-about .about-fact__k {
  display: block;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.1;
  color: var(--gold);
}

.page-about .about-fact__v {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  color: var(--steel);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

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

.page-about .about-stack__media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--about-hair);
  background: var(--ink-800);
  box-shadow: var(--shadow);
  aspect-ratio: 3 / 2;
}

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

.page-about .about-stack__cap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel);
}

.page-about .about-stack__tag {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--ink-900);
  background: var(--gold);
  border-radius: 999px;
  padding: 4px 10px;
}

/* ---------- 章节索引条 ---------- */
.page-about .about-index {
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
  background: rgba(13, 42, 68, 0.6);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 12px 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-index__list a {
  display: inline-block;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--steel);
  border: 1px solid var(--about-hair);
  border-radius: 999px;
  padding: 7px 14px;
  text-decoration: none;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible,
.page-about .about-index__list a.is-current {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  padding: clamp(48px, 8vw, 96px) 0;
}

.page-about .about-section--tint {
  background: linear-gradient(180deg, rgba(13, 42, 68, 0.62), rgba(7, 26, 43, 0) 88%);
}

.page-about .sec-head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .sec-no {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .sec-title {
  font-size: clamp(25px, 4.2vw, 40px);
  line-height: 1.16;
  color: var(--fog);
}

.page-about .sec-sub {
  margin: 14px 0 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--steel);
}

/* ---------- 01 自述 ---------- */
.page-about .about-split {
  display: grid;
  gap: 26px;
}

.page-about .about-body p {
  margin: 0 0 1em;
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.85;
  color: rgba(234, 241, 245, 0.84);
}

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

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

.page-about .about-mini__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px 14px;
  padding: 16px 18px;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(23, 63, 95, 0.55), rgba(10, 33, 54, 0.8));
}

.page-about .about-mini__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  padding-top: 4px;
}

.page-about .about-mini__title {
  font-size: 17px;
  color: var(--fog);
  margin-bottom: 5px;
}

.page-about .about-mini__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--steel);
}

/* ---------- 02 历程 ---------- */
.page-about .about-years {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.page-about .about-years a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  padding: 6px 13px;
  border-radius: 999px;
  border: 1px solid var(--about-gold-line);
  color: var(--gold);
  text-decoration: none;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-years a:hover,
.page-about .about-years a:focus-visible {
  background: var(--gold);
  color: var(--ink-900);
}

.page-about .about-timeline__media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--about-hair);
  margin: 0 0 clamp(24px, 4vw, 36px);
  aspect-ratio: 16 / 7;
}

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

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

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 26px 26px;
  border-left: 1px solid var(--about-hair);
  scroll-margin-top: 96px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(216, 168, 78, 0.14);
}

.page-about .about-timeline__item:target::before {
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(53, 224, 208, 0.2);
}

.page-about .about-timeline__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 19px;
  letter-spacing: 0.05em;
  color: var(--gold);
  margin-bottom: 6px;
}

.page-about .about-timeline__body h3 {
  font-size: 18px;
  color: var(--fog);
  margin-bottom: 6px;
}

.page-about .about-timeline__body p {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--steel);
}

/* ---------- 03 认证 ---------- */
.page-about .about-cert {
  display: grid;
  gap: 14px;
}

.page-about .about-cert__item {
  border: 1px solid var(--about-hair);
  border-left: 3px solid var(--about-gold-line);
  border-radius: var(--radius);
  background: var(--about-card-bg);
  padding: 16px 18px;
  transition: border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-about .about-cert__item[open] {
  border-left-color: var(--cyan);
  background: rgba(23, 63, 95, 0.62);
}

.page-about .about-cert__head {
  display: flex;
  align-items: center;
  gap: 11px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16.5px;
  color: var(--fog);
}

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

.page-about .about-cert__dot {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 0 3px rgba(47, 175, 154, 0.2);
}

.page-about .about-cert__chev {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--steel);
  transition: transform 0.24s var(--ease);
}

.page-about .about-cert__item[open] .about-cert__chev {
  transform: rotate(45deg);
  color: var(--cyan);
}

.page-about .about-cert__body {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--steel);
}

/* ---------- 04 团队 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: clamp(24px, 4vw, 38px);
}

.page-about .about-stat {
  background: var(--ink-850);
  padding: 18px 16px;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(25px, 4vw, 33px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-stat__unit {
  font-size: 13px;
  color: var(--gold);
  margin-left: 3px;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--steel);
}

.page-about .about-team {
  display: grid;
  gap: 24px;
}

.page-about .about-team__body p {
  margin: 0 0 1em;
  font-size: clamp(14.5px, 1.5vw, 16px);
  line-height: 1.85;
  color: rgba(234, 241, 245, 0.82);
}

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

.page-about .about-team__media {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--about-hair);
  aspect-ratio: 3 / 2;
}

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

/* ---------- 05 网络 ---------- */
.page-about .about-network {
  display: grid;
  gap: 20px;
}

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

.page-about .about-nodes__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 14px;
  padding: 16px 18px;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  background: rgba(13, 42, 68, 0.5);
  transition: border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-about .about-nodes__item:hover,
.page-about .about-nodes__item:focus-within {
  border-color: var(--line-cyan);
  background: rgba(53, 224, 208, 0.08);
}

.page-about .about-nodes__num {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 34px);
  line-height: 1;
  color: var(--gold);
}

.page-about .about-nodes__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15.5px;
  color: var(--fog);
}

.page-about .about-nodes__desc {
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--steel);
}

.page-about .about-addr {
  padding: 22px 20px;
  border: 1px solid var(--about-gold-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(155deg, rgba(216, 168, 78, 0.14), rgba(10, 33, 54, 0.82));
}

.page-about .about-addr__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-addr__line {
  margin: 0 0 10px;
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.5;
  font-weight: 600;
  color: var(--fog);
}

.page-about .about-addr__note {
  margin: 0 0 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .about-addr__link {
  display: inline-block;
  font-size: 13.5px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
  padding-bottom: 2px;
}

.page-about .about-addr__link:hover {
  color: var(--gold);
  border-bottom-color: var(--about-gold-line);
}

/* ---------- 06 生态 ---------- */
.page-about .about-eco {
  display: grid;
  gap: 24px;
}

.page-about .about-eco__text p {
  margin: 0 0 1em;
  font-size: clamp(14.5px, 1.5vw, 16px);
  line-height: 1.85;
  color: rgba(234, 241, 245, 0.82);
}

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

.page-about .about-honors {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-honors__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  background: var(--ink-850);
  padding: 15px 16px;
}

.page-about .about-honors__year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  white-space: nowrap;
}

.page-about .about-honors__text {
  font-size: 13.8px;
  line-height: 1.7;
  color: var(--fog);
}

/* ---------- 07 承诺 ---------- */
.page-about .about-promise {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-promise__item {
  padding: 20px 18px;
  border: 1px solid var(--about-hair);
  border-top: 2px solid var(--about-gold-line);
  border-radius: var(--radius);
  background: rgba(13, 42, 68, 0.52);
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.page-about .about-promise__title {
  font-size: 17px;
  line-height: 1.4;
  color: var(--fog);
}

.page-about .about-promise__text {
  margin: 0;
  font-size: 13.8px;
  line-height: 1.76;
  color: var(--steel);
}

.page-about .about-promise__link {
  margin-top: auto;
  align-self: flex-start;
  font-size: 13px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
  padding-bottom: 2px;
}

.page-about .about-promise__link:hover {
  color: var(--gold);
  border-bottom-color: var(--about-gold-line);
}

.page-about .about-closing {
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding-top: 20px;
  border-top: 1px dashed var(--about-hair);
  font-size: 14px;
  line-height: 1.8;
  color: var(--steel);
  max-width: 72ch;
}

.page-about .about-closing a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}

.page-about .about-closing a:hover {
  color: var(--gold);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-cert {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .about-stat {
    padding: 22px 18px;
  }

  .page-about .about-nodes {
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

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

  .page-about .about-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-network {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-timeline__item {
    padding-left: 34px;
    padding-bottom: 32px;
  }
}

@media (min-width: 1120px) {
  .page-about .about-timeline {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
    border-top: 1px solid var(--about-hair);
    padding-top: 26px;
  }

  .page-about .about-timeline__item {
    border-left: 0;
    border-top: 0;
    padding: 0 20px 0 0;
  }

  .page-about .about-timeline__item::before {
    left: 0;
    top: -31px;
  }

  .page-about .about-timeline__item:last-child {
    padding-right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__list a,
  .page-about .about-years a,
  .page-about .about-cert__chev,
  .page-about .about-nodes__item {
    transition: none;
  }
}
<<<END>>>
```