.page-about {
  --about-rail: 72px;
  --about-muted: #93A1B4;
  --about-raise: #102C52;
  background: var(--c-ink);
  color: var(--c-pale);
  padding-top: clamp(14px, 2.5vw, 26px);
  padding-bottom: clamp(56px, 9vw, 118px);
}

/* ---------- 面包屑 ---------- */
.page-about .gi-crumbs {
  padding-bottom: clamp(14px, 2.6vw, 26px);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--about-muted);
}
.page-about .gi-crumbs a {
  color: var(--c-volt-soft);
  text-decoration: none;
}
.page-about .gi-crumbs a:hover,
.page-about .gi-crumbs a:focus-visible {
  color: var(--c-gold);
}
.page-about .gi-crumbs [aria-current="page"] {
  color: var(--c-gold);
}
.page-about .gi-crumbs__sep {
  color: var(--c-line);
  margin: 0 0.5em;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
  background:
    radial-gradient(120% 95% at 88% 8%, rgba(30, 91, 255, 0.2) 0%, rgba(10, 26, 47, 0) 62%),
    var(--c-ink);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(127, 168, 255, 0.07) 0 1px, transparent 1px 72px),
    repeating-linear-gradient(180deg, rgba(127, 168, 255, 0.07) 0 1px, transparent 1px 72px);
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(26px, 5vw, 52px);
  padding-block: clamp(34px, 6.5vw, 82px);
  align-items: center;
}
.page-about .about-hero__coord {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--c-gold);
  margin: 0 0 16px;
}
.page-about .about-hero__title {
  font-family: var(--f-head);
  font-weight: 900;
  font-size: clamp(29px, 5.2vw, 52px);
  line-height: 1.17;
  letter-spacing: -0.02em;
  color: var(--c-bone);
  margin: 0 0 clamp(16px, 2.2vw, 24px);
  max-width: 18ch;
}
.page-about .about-hero__lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.92;
  color: var(--c-pale);
  max-width: 42em;
}
.page-about .about-hero__fig {
  position: relative;
  margin: 0;
  border: 1px solid var(--c-line);
  background: var(--c-ink-2);
}
.page-about .about-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
}
.page-about .about-hero__fig::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, rgba(242, 239, 233, 0.09) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(180deg, rgba(242, 239, 233, 0.09) 0 1px, transparent 1px 40px);
}

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

/* ---------- 轨道骨架 ---------- */
.page-about .about-track {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  padding-top: clamp(40px, 7vw, 86px);
}
.page-about .about-rail {
  display: none;
}
.page-about .about-panels {
  display: grid;
  gap: clamp(42px, 6vw, 78px);
  min-width: 0;
}
.page-about .about-step {
  min-width: 0;
  scroll-margin-top: calc(var(--hdr) + 28px);
}

@media (min-width: 980px) {
  .page-about .about-track {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
  }
  .page-about .about-rail {
    display: block;
  }
  .page-about .about-rail__line {
    position: sticky;
    top: calc(var(--hdr) + 44px);
    display: block;
    width: 1px;
    height: 54vh;
    background-image: repeating-linear-gradient(180deg, var(--c-volt) 0 12px, rgba(22, 59, 122, 0.9) 12px 24px);
  }
  .page-about .about-rail__line::after {
    content: "";
    display: block;
    width: 7px;
    height: 7px;
    margin-left: -3px;
    margin-top: -3px;
    background: var(--c-gold);
  }

  .page-about .about-step:nth-child(2) { margin-right: 22px; }
  .page-about .about-step:nth-child(3) { margin-left: 24px; }
  .page-about .about-step:nth-child(4) { margin-right: 38px; }
  .page-about .about-step:nth-child(5) { margin-left: 18px; margin-right: 24px; }
  .page-about .about-step:nth-child(6) { margin-left: 42px; }
  .page-about .about-step:nth-child(7) { margin-left: 62px; margin-right: 24px; }
}

/* ---------- 章节头 ---------- */
.page-about .gi-head {
  margin: 0 0 clamp(20px, 3vw, 32px);
}
.page-about .gi-head__coord {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-gold);
  margin: 0 0 12px;
}
.page-about .gi-head__title {
  font-family: var(--f-head);
  font-weight: 900;
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--c-bone);
  margin: 0 0 12px;
}
.page-about .gi-head__sub {
  margin: 0;
  font-size: 15px;
  line-height: 1.88;
  color: var(--c-volt-soft);
  max-width: 56em;
}

/* ---------- C01 服务范围 ---------- */
.page-about .about-services {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}
.page-about .about-service {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--c-ink-2);
  padding: clamp(20px, 2.6vw, 30px);
}
.page-about .about-service__no {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--c-volt);
}
.page-about .about-service h3 {
  margin: 0;
  font-family: var(--f-head);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.4;
  color: var(--c-bone);
}
.page-about .about-service p {
  margin: 0;
  flex: 1;
  font-size: 15px;
  line-height: 1.82;
  color: var(--c-pale);
}
.page-about .about-link {
  align-self: flex-start;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-volt-soft);
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid rgba(127, 168, 255, 0.42);
  transition: color 0.16s ease, border-color 0.16s ease;
}
.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--c-gold);
  border-bottom-color: var(--c-gold);
}

@media (min-width: 680px) {
  .page-about .about-services {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- C02 栏目划分 ---------- */
.page-about .about-figure {
  position: relative;
  margin: 0 0 clamp(20px, 3vw, 32px);
  border: 1px solid var(--c-line);
  background: var(--c-ink-2);
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}
.page-about .about-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--c-line);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--about-muted);
}

.page-about .about-columns {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}
.page-about .about-column {
  background: var(--c-ink-2);
  border: 1px solid var(--c-line);
  border-top: 2px solid transparent;
  padding: 18px 16px 22px;
  transition: background 0.16s ease, border-color 0.16s ease;
}
.page-about .about-column:hover,
.page-about .about-column:focus-within {
  background: var(--about-raise);
  border-top-color: var(--c-gold);
}
.page-about .about-column__no {
  display: block;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--c-volt);
  margin-bottom: 10px;
}
.page-about .about-column h3 {
  margin: 0 0 8px;
  font-family: var(--f-head);
  font-weight: 800;
  font-size: 16px;
  line-height: 1.4;
  color: var(--c-bone);
}
.page-about .about-column p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--c-pale);
}

@media (min-width: 620px) {
  .page-about .about-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (min-width: 1020px) {
  .page-about .about-columns {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 8px;
    align-items: start;
  }
  .page-about .about-column:nth-child(2) { margin-top: 12px; }
  .page-about .about-column:nth-child(3) { margin-top: 24px; }
  .page-about .about-column:nth-child(4) { margin-top: 36px; }
  .page-about .about-column:nth-child(5) { margin-top: 48px; }
}

/* ---------- C03 编号用法 ---------- */
.page-about .about-tabs {
  border: 1px solid var(--c-line);
  background: var(--c-ink-2);
}
.page-about .about-tabs .gi-tabs__list {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--c-line);
}
.page-about .about-tabs .gi-tabs__btn {
  appearance: none;
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  color: var(--c-pale);
  font-family: var(--f-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  padding: 14px 20px;
  cursor: pointer;
  transition: color 0.16s ease, border-color 0.16s ease;
}
.page-about .about-tabs .gi-tabs__btn:hover {
  color: var(--c-gold);
}
.page-about .about-tabs .gi-tabs__btn[aria-selected="true"] {
  color: var(--c-gold);
  border-bottom-color: var(--c-gold);
}
.page-about .about-tabs .gi-tabs__btn:focus-visible {
  outline: 2px solid var(--c-volt-soft);
  outline-offset: -2px;
}
.page-about .about-tabs .gi-tabs__panel {
  padding: clamp(20px, 3vw, 34px);
}
.page-about .about-tabs .gi-tabs__panel + .gi-tabs__panel {
  border-top: 1px solid var(--c-line);
}
.page-about .about-tabpanel__sample {
  font-family: var(--f-mono);
  font-size: clamp(24px, 4vw, 38px);
  letter-spacing: 0.06em;
  line-height: 1.2;
  color: var(--c-volt-soft);
  margin: 0 0 16px;
  padding-left: 16px;
  border-left: 3px solid var(--c-volt);
}
.page-about .about-tabpanel h3 {
  margin: 0 0 10px;
  font-family: var(--f-head);
  font-weight: 800;
  font-size: 18px;
  color: var(--c-bone);
}
.page-about .about-tabpanel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.88;
  color: var(--c-pale);
  max-width: 46em;
}

/* ---------- C04 站点历程 ---------- */
.page-about .about-era-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(20px, 3vw, 30px);
}
.page-about .about-era-nav a {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--c-volt-soft);
  border: 1px solid var(--c-line);
  padding: 8px 14px;
  transition: background 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}
.page-about .about-era-nav a:hover,
.page-about .about-era-nav a:focus-visible {
  background: var(--c-gold);
  border-color: var(--c-gold);
  color: var(--c-ink);
}

.page-about .about-eras {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}
.page-about .about-era {
  position: relative;
  padding: 4px 0 4px 30px;
  scroll-margin-top: calc(var(--hdr) + 28px);
  transition: background 0.18s ease;
}
.page-about .about-era::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: -30px;
  width: 1px;
  background: var(--c-line);
}
.page-about .about-era:last-child::before {
  bottom: 12px;
  background: linear-gradient(180deg, var(--c-line) 0%, rgba(22, 59, 122, 0) 100%);
}
.page-about .about-era::after {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 11px;
  height: 11px;
  border: 1px solid var(--c-volt);
  background: var(--c-ink);
  transform: rotate(45deg);
}
.page-about .about-era__year {
  display: block;
  margin: 0 0 8px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-volt-soft);
}
.page-about .about-era h3 {
  margin: 0 0 10px;
  font-family: var(--f-head);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.4;
  color: var(--c-bone);
}
.page-about .about-era p {
  margin: 0;
  font-size: 15px;
  line-height: 1.88;
  color: var(--c-pale);
  max-width: 46em;
}
.page-about .about-era:target {
  background: rgba(30, 91, 255, 0.1);
  box-shadow: -14px 0 0 rgba(30, 91, 255, 0.1);
}
.page-about .about-era:target::after {
  background: var(--c-gold);
  border-color: var(--c-gold);
}
.page-about .about-era:target .about-era__year {
  color: var(--c-gold);
}

@media (min-width: 980px) {
  .page-about .about-era:nth-child(1) { margin-right: 24%; }
  .page-about .about-era:nth-child(2) { margin-right: 17%; }
  .page-about .about-era:nth-child(3) { margin-right: 9%; }
  .page-about .about-era:nth-child(4) { margin-right: 0; }
}

/* ---------- C05 维护团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
}
.page-about .about-team__item {
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--c-volt);
  margin-bottom: clamp(20px, 3vw, 30px);
}
.page-about .about-team__item:last-child {
  margin-bottom: 0;
}
.page-about .about-team__item--serve {
  border-left-color: var(--c-moss);
}
.page-about .about-team__item h3 {
  margin: 0 0 8px;
  font-family: var(--f-head);
  font-weight: 800;
  font-size: 18px;
  color: var(--c-bone);
}
.page-about .about-team__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.88;
  color: var(--c-pale);
}
.page-about .about-team__fig {
  margin: 0;
  border: 1px solid var(--c-line);
  background: var(--c-ink-2);
}
.page-about .about-team__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}
.page-about .about-team__fig figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--c-line);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--about-muted);
}

@media (min-width: 860px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
  }
}

/* ---------- C06 延伸阅读 ---------- */
.page-about .about-network {
  display: grid;
  gap: 18px;
  border: 1px solid var(--c-line);
  background: var(--c-ink-2);
  padding: clamp(22px, 3.4vw, 36px);
}
.page-about .about-network p {
  margin: 0;
  font-size: 15px;
  line-height: 1.88;
  color: var(--c-pale);
  max-width: 46em;
}
.page-about .about-network .gi-btn {
  justify-self: start;
}

@media (min-width: 760px) {
  .page-about .about-network {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
  .page-about .about-network .gi-btn {
    justify-self: end;
  }
}

/* ---------- C07 联系坐标 ---------- */
.page-about .about-cta {
  position: relative;
  border: 1px solid var(--c-volt);
  background:
    linear-gradient(135deg, rgba(30, 91, 255, 0.24) 0%, rgba(10, 26, 47, 0) 64%),
    var(--c-ink-2);
  padding: clamp(26px, 4vw, 48px);
}
.page-about .about-cta__coord {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--c-gold);
  margin: 0 0 14px;
}
.page-about .about-cta h2 {
  margin: 0 0 12px;
  font-family: var(--f-head);
  font-weight: 900;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.28;
  color: var(--c-bone);
}
.page-about .about-cta p {
  margin: 0 0 clamp(20px, 3vw, 28px);
  font-size: 15px;
  line-height: 1.88;
  color: var(--c-pale);
  max-width: 40em;
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
@media (max-width: 480px) {
  .page-about .about-cta__actions .gi-btn {
    width: 100%;
  }
}
<<<END>>>