.page-about {
  --ab-line: rgba(47, 227, 208, 0.45);
  --ab-border: rgba(22, 69, 107, 0.55);
  --ab-border-light: rgba(22, 69, 107, 0.26);
  background: var(--deep);
  color: var(--gray);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(18px, 3vw, 32px) 0 clamp(52px, 8vw, 104px);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(47, 227, 208, 0.18), transparent 62%),
    radial-gradient(90% 70% at -10% 110%, rgba(255, 106, 43, 0.14), transparent 65%),
    var(--deep);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
  margin-top: clamp(22px, 4vw, 44px);
}

.page-about .about-hero__title {
  margin: 12px 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5.2vw, 52px);
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: 0 0 16px;
  font-size: clamp(16px, 1.9vw, 18px);
  line-height: 1.8;
  letter-spacing: 0.01em;
  color: var(--mist);
  max-width: 34em;
}

.page-about .about-hero__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
  max-width: 36em;
}

.page-about .about-hero .eyebrow {
  color: var(--cyan);
  margin: 0;
}

.page-about .archive {
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--ab-border);
  background: linear-gradient(160deg, rgba(12, 44, 74, 0.96), rgba(6, 26, 43, 0.92));
  box-shadow: 8px 8px 0 rgba(22, 69, 107, 0.55), 16px 16px 0 rgba(22, 69, 107, 0.2);
}

.page-about .archive::before,
.page-about .archive::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 2px solid var(--orange);
}

.page-about .archive::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .archive::after {
  bottom: -1px;
  right: -1px;
  border-left: 0;
  border-top: 0;
}

.page-about .archive__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .archive__year {
  margin: 6px 0 18px;
  font-family: var(--font-mono);
  font-size: clamp(44px, 9vw, 80px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-about .archive__list {
  margin: 0;
  padding: 0;
}

.page-about .archive__row {
  display: grid;
  grid-template-columns: 4.5em 1fr;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid rgba(22, 69, 107, 0.8);
}

.page-about .archive__row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gray);
}

.page-about .archive__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
}

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

/* ---------- 通用章节标题 ---------- */
.page-about .sec-head {
  max-width: 44em;
  margin-bottom: clamp(30px, 5vw, 54px);
}

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

.page-about .sec-head h2 {
  margin: 10px 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1.24;
  letter-spacing: -0.01em;
}

.page-about .sec-head p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
}

/* ---------- 沿革 ---------- */
.page-about .about-lineage {
  padding: clamp(52px, 8vw, 108px) 0;
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-lineage .sec-head .eyebrow {
  color: var(--steel);
}

.page-about .about-lineage .sec-head h2 {
  color: var(--deep);
}

.page-about .lineage {
  display: grid;
  gap: clamp(30px, 5vw, 52px);
}

.page-about .lineage__figure {
  margin: 0;
  padding: 8px;
  border: 1px solid var(--ab-border-light);
  background: var(--hull);
  box-shadow: 8px 8px 0 rgba(22, 69, 107, 0.14), 16px 16px 0 rgba(22, 69, 107, 0.07);
  transform: rotate(-1.5deg);
}

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

.page-about .lineage__figure figcaption {
  padding: 10px 4px 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .lineage__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
}

.page-about .lineage__list::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, rgba(22, 69, 107, 0.2), var(--cyan) 30%, var(--orange));
}

.page-about .node {
  position: relative;
  display: grid;
  gap: 6px;
  padding-bottom: clamp(22px, 4vw, 38px);
}

.page-about .node::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 14px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--steel);
  box-shadow: 0 0 0 4px rgba(47, 227, 208, 0.16);
}

.page-about .node--current::before {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(47, 227, 208, 0.3), 0 0 18px rgba(47, 227, 208, 0.55);
}

.page-about .node__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(36px, 9vw, 68px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--steel);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-about .node__year:hover,
.page-about .node__year:focus-visible {
  color: var(--orange);
}

.page-about .node__body {
  padding: clamp(16px, 2.4vw, 24px);
  border: 1px solid var(--ab-border-light);
  background: var(--mist);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .node__body:hover,
.page-about .node__body:focus-within {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .node__tag {
  display: inline-block;
  margin: 0 0 10px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  background: var(--deep);
  color: var(--cyan);
}

.page-about .node__tag.tag--orange {
  background: var(--orange);
  color: var(--deep);
}

.page-about .node__body h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.2vw, 21px);
  line-height: 1.4;
  color: var(--deep);
}

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

.page-about .node__extra {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--ab-border-light);
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .node__link {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
}

.page-about .node__link:hover,
.page-about .node__link:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 整幅夜航图 ---------- */
.page-about .about-band {
  background: var(--deep);
}

.page-about .about-band__figure {
  position: relative;
  margin: 0;
}

.page-about .about-band__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 60vh;
  object-fit: cover;
  opacity: 0.58;
}

.page-about .about-band__figure figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: clamp(18px, 4vw, 44px) var(--gutter);
  background: linear-gradient(0deg, rgba(6, 26, 43, 0.94), rgba(6, 26, 43, 0));
}

.page-about .about-band__kicker {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-band__line {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(20px, 3.4vw, 34px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--paper);
}

/* ---------- 分工 ---------- */
.page-about .about-maintain {
  padding: clamp(52px, 8vw, 108px) 0;
  background:
    radial-gradient(90% 70% at 100% 0%, rgba(47, 227, 208, 0.12), transparent 60%),
    var(--deep);
}

.page-about .maintain__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

.page-about .maintain__lead .eyebrow {
  margin: 0;
  color: var(--cyan);
}

.page-about .maintain__lead h2 {
  margin: 10px 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .maintain__intro {
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--gray);
  max-width: 34em;
}

.page-about .roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(12px, 2vw, 16px);
}

.page-about .role {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  padding: clamp(16px, 2.4vw, 20px);
  border: 1px solid var(--ab-border);
  background: rgba(12, 44, 74, 0.55);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .role:hover {
  border-color: var(--cyan);
  background: rgba(12, 44, 74, 0.82);
}

.page-about .role__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-about .role h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
  color: var(--paper);
}

.page-about .role p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray);
}

.page-about .maintain__figure {
  margin: 0;
  padding: 8px;
  border: 1px solid var(--ab-border);
  background: var(--hull);
  box-shadow: 8px 8px 0 rgba(22, 69, 107, 0.55), 16px 16px 0 rgba(22, 69, 107, 0.2);
  transform: rotate(1.5deg);
  align-self: start;
}

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

.page-about .maintain__figure figcaption {
  padding: 10px 4px 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

/* ---------- 访问分布 ---------- */
.page-about .about-reach {
  padding: clamp(52px, 8vw, 108px) 0;
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-reach .sec-head .eyebrow {
  color: var(--steel);
}

.page-about .about-reach .sec-head h2 {
  color: var(--deep);
}

.page-about .reach__grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .reach__map {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 5px;
  padding: 10px;
  border: 1px solid var(--ab-border-light);
  background: var(--mist);
}

.page-about .reach__cell {
  aspect-ratio: 1 / 1;
  background: rgba(22, 69, 107, 0.12);
  transition: background-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .reach__cell--mid {
  background: rgba(22, 69, 107, 0.34);
}

.page-about .reach__cell--high {
  background: var(--steel);
}

.page-about .reach__cell--hot {
  background: var(--orange);
}

.page-about .reach__cell:hover {
  background: var(--cyan);
  transform: scale(1.12);
}

.page-about .reach__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}

.page-about .stat {
  padding: 14px 16px;
  border-left: 2px solid var(--cyan);
  background: rgba(227, 236, 243, 0.7);
}

.page-about .stat__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 34px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--deep);
}

.page-about .stat__label {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .reach__legend {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .reach__legend li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink);
}

.page-about .reach__swatch {
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  background: rgba(22, 69, 107, 0.16);
  border: 1px solid var(--ab-border-light);
}

.page-about .reach__swatch--high {
  background: var(--steel);
  border-color: var(--steel);
}

.page-about .reach__swatch--hot {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .reach__note {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .reach__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
}

.page-about .reach__link:hover,
.page-about .reach__link:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 承诺与备案 ---------- */
.page-about .about-pledge {
  padding: clamp(52px, 8vw, 108px) 0;
  background: linear-gradient(180deg, var(--hull), var(--deep));
  color: var(--gray);
}

.page-about .pledge__grid {
  display: grid;
  gap: clamp(28px, 5vw, 52px);
}

.page-about .pledge__lead .eyebrow {
  margin: 0;
  color: var(--cyan);
}

.page-about .pledge__lead h2 {
  margin: 10px 0 24px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .pledge__list {
  margin: 0 0 28px;
  padding: 0;
}

.page-about .pledge__row {
  display: grid;
  gap: 6px;
  padding: 14px 0;
  border-top: 1px solid rgba(22, 69, 107, 0.85);
}

.page-about .pledge__row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .pledge__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

.page-about .pledge__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .pledge__card {
  position: relative;
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--ab-border);
  background: rgba(6, 26, 43, 0.72);
}

.page-about .pledge__card::before,
.page-about .pledge__card::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 2px solid var(--cyan);
}

.page-about .pledge__card::before {
  top: -1px;
  right: -1px;
  border-left: 0;
  border-bottom: 0;
}

.page-about .pledge__card::after {
  bottom: -1px;
  left: -1px;
  border-right: 0;
  border-top: 0;
}

.page-about .pledge__card-title {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .pledge__lines {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .pledge__lines li {
  display: grid;
  gap: 4px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-about .pledge__lines .mono {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

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

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .reach__map {
    grid-template-columns: repeat(8, 1fr);
    gap: 6px;
  }
}

@media (min-width: 760px) {
  .page-about .node {
    grid-template-columns: 168px 1fr;
    gap: 24px;
    align-items: start;
  }

  .page-about .node__year {
    padding-top: 4px;
  }
}

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

  .page-about .lineage {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }

  .page-about .lineage__figure {
    position: sticky;
    top: 96px;
  }

  .page-about .maintain__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .reach__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .page-about .pledge__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-about .reach__map {
    grid-template-columns: repeat(8, 1fr);
    gap: 8px;
    padding: 14px;
  }

  .page-about .sec-head--wide {
    max-width: 52em;
  }
}

@media (min-width: 760px) and (hover: hover) {
  .page-about .node__extra {
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    overflow: hidden;
    opacity: 0;
    border-top-color: transparent;
    transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease),
      padding-top var(--dur) var(--ease), margin-top var(--dur) var(--ease);
  }

  .page-about .node__body:hover .node__extra,
  .page-about .node__body:focus-within .node__extra {
    max-height: 140px;
    margin-top: 10px;
    padding-top: 10px;
    opacity: 1;
    border-top-color: rgba(22, 69, 107, 0.26);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .node__body,
  .page-about .node__extra,
  .page-about .reach__cell,
  .page-about .role,
  .page-about .node__year {
    transition: color var(--dur) var(--ease), background-color var(--dur) var(--ease),
      border-color var(--dur) var(--ease);
  }

  .page-about .node__body:hover,
  .page-about .node__body:focus-within {
    transform: none;
  }

  .page-about .reach__cell:hover {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>