.page-about {
  --ab-grid: rgba(147, 169, 181, 0.09);
  position: relative;
  overflow-x: clip;
  background-color: var(--ink);
  color: var(--fog);
  font-family: var(--font-body);
}

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

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

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

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding: clamp(14px, 3vw, 22px) 0 0;
}

.page-about .crumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .crumbs__item {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .crumbs__item + .crumbs__item::before {
  content: "/";
  color: var(--line-strong);
}

.page-about .crumbs__item a {
  color: var(--mist);
  text-decoration: none;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 5vw, 52px) 0 clamp(44px, 7vw, 84px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(90% 70% at 88% -10%, rgba(255, 107, 26, 0.15), transparent 62%),
    radial-gradient(70% 60% at 0% 0%, rgba(47, 191, 113, 0.14), transparent 60%),
    repeating-linear-gradient(0deg, var(--ab-grid) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(90deg, var(--ab-grid) 0 1px, transparent 1px 24px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 5vw, 48px);
  align-items: end;
}

.page-about .about-hero__kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--grass);
}

.page-about .about-hero h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 7.4vw, 64px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  color: var(--fog);
}

.page-about .about-hero__text {
  margin: 0 0 24px;
  max-width: 30em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(242, 246, 245, 0.84);
}

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

/* 首屏概况卡 */
.page-about .about-facts {
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--grass);
  border-radius: var(--r);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
  backdrop-filter: blur(6px);
}

.page-about .about-facts__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-facts__item {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-about .about-facts__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 4vw, 28px);
  font-weight: 600;
  line-height: 1;
  color: var(--grass);
}

.page-about .about-facts__item--signal .about-facts__num {
  color: var(--orange);
}

.page-about .about-facts__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-facts__foot {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  position: relative;
  padding: clamp(44px, 7vw, 84px) 0;
}

.page-about .ab-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(24px, 4vw, 40px);
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .ab-head__idx {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-about .ab-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 4.6vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--fog);
}

.page-about .ab-head__note {
  margin: 0;
  max-width: 640px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 01 起点 ---------- */
.page-about .about-start__grid {
  display: grid;
  gap: clamp(20px, 4vw, 36px);
}

.page-about .about-start__body p {
  margin: 0 0 16px;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(242, 246, 245, 0.88);
}

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

.page-about .about-start__aside {
  padding: 22px 20px;
  border-radius: var(--r);
  border: 1px solid var(--line);
  border-top: 2px solid var(--orange);
  background: linear-gradient(160deg, rgba(42, 35, 82, 0.72), rgba(7, 26, 43, 0.6));
}

.page-about .about-start__quote {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(20px, 3.6vw, 26px);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--fog);
}

.page-about .about-start__small {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 02 流程 ---------- */
.page-about .about-flow {
  background:
    repeating-linear-gradient(90deg, var(--ab-grid) 0 1px, transparent 1px 24px),
    linear-gradient(180deg, var(--ink), var(--ink-2) 55%, var(--ink));
}

.page-about .about-flow__media {
  aspect-ratio: 3 / 2;
  margin: 0 0 clamp(22px, 4vw, 34px);
}

.page-about .flow-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .flow-step {
  position: relative;
  overflow: hidden;
  padding: 22px 18px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: linear-gradient(180deg, rgba(13, 47, 56, 0.92), rgba(7, 26, 43, 0.92));
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.page-about .flow-step::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--grass), rgba(47, 191, 113, 0) 72%);
}

.page-about .flow-step:hover,
.page-about .flow-step:focus-within {
  transform: translateY(-3px);
  border-color: var(--grass);
}

.page-about .flow-step__num {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--grass);
}

.page-about .flow-step__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--fog);
}

.page-about .flow-step__text {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(242, 246, 245, 0.82);
}

.page-about .flow-step__meta {
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 03 覆盖 ---------- */
.page-about .about-cover__grid {
  display: grid;
  gap: clamp(20px, 4vw, 36px);
}

.page-about .about-cover__sub {
  margin: 0 0 16px;
  font-size: 13px;
  letter-spacing: 0.14em;
  font-weight: 600;
  color: var(--grass);
}

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

.page-about .cover-group {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .cover-group__tag {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--orange);
  padding-top: 3px;
}

.page-about .cover-group__name {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--fog);
}

.page-about .cover-group__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .about-cover__foot {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(242, 246, 245, 0.8);
}

.page-about .about-cover__media {
  aspect-ratio: 3 / 2;
  margin: 0;
  border: 1px solid var(--line-strong);
}

.page-about .cover-times {
  display: grid;
  gap: 12px;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .cover-time {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  border-radius: var(--r);
  background: var(--glass);
  border: 1px solid var(--line);
}

.page-about .cover-time__num {
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  line-height: 1;
  color: var(--yellow);
}

.page-about .cover-time__unit {
  font-size: 12px;
  color: var(--mist);
}

.page-about .cover-time__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(242, 246, 245, 0.86);
}

/* ---------- 04 历程 ---------- */
.page-about .about-timeline {
  background:
    repeating-linear-gradient(0deg, rgba(147, 169, 181, 0.14) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(90deg, rgba(147, 169, 181, 0.14) 0 1px, transparent 1px 24px),
    linear-gradient(180deg, var(--ink-2), var(--ink) 62%);
}

.page-about .timeline-wrap {
  display: grid;
  gap: clamp(16px, 3vw, 26px);
}

.page-about .year-rail {
  min-width: 0;
}

.page-about .year-rail__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .year-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .year-rail__link {
  display: block;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .year-rail__link:hover,
.page-about .year-rail__link:focus-visible {
  color: var(--grass);
  border-color: var(--grass);
}

.page-about .tl-list {
  position: relative;
  display: grid;
  gap: clamp(18px, 3.5vw, 30px);
  margin: 0;
  padding: 0 0 0 24px;
  list-style: none;
}

.page-about .tl-list::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--grass), rgba(47, 191, 113, 0.08));
}

.page-about .tl-node {
  position: relative;
  min-width: 0;
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: rgba(7, 26, 43, 0.92);
  scroll-margin-top: 110px;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -21px;
  top: 26px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--grass);
  box-shadow: 0 0 0 4px rgba(47, 191, 113, 0.16);
}

.page-about .tl-node:target {
  border-color: var(--orange);
  background: linear-gradient(180deg, rgba(90, 31, 51, 0.5), rgba(7, 26, 43, 0.94));
}

.page-about .tl-node:target::before {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 26, 0.2);
}

.page-about .tl-node__year {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--grass);
}

.page-about .tl-node__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(18px, 3.2vw, 22px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--fog);
}

.page-about .tl-node__text {
  margin: 0;
  max-width: 42em;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(242, 246, 245, 0.84);
}

.page-about .tl-node__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 14px 0 0;
}

.page-about .tl-node__media {
  aspect-ratio: 3 / 2;
  margin: 16px 0 0;
  border: 1px solid var(--line);
}

.page-about .tl-node--media .tl-node__media {
  max-width: 420px;
}

/* ---------- 05 团队 ---------- */
.page-about .about-team {
  position: relative;
  background: linear-gradient(165deg, rgba(42, 35, 82, 0.95), var(--ink) 78%);
}

.page-about .about-team::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 6px;
  background: linear-gradient(
    90deg,
    var(--grass) 0 28%,
    var(--orange) 28% 52%,
    var(--indigo) 52% 76%,
    var(--wine) 76% 100%
  );
  transform: skewY(-0.6deg);
  transform-origin: left center;
}

.page-about .team-cards {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .team-card {
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--grass);
  border-radius: var(--r);
  background: rgba(7, 26, 43, 0.62);
  min-width: 0;
}

.page-about .team-card--signal {
  border-top-color: var(--orange);
}

.page-about .team-card--yellow {
  border-top-color: var(--yellow);
}

.page-about .team-card__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 44px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--fog);
}

.page-about .team-card__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 800;
  color: var(--fog);
}

.page-about .team-card__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .team-reach {
  margin: clamp(22px, 4vw, 34px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--grass);
  max-width: 46em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(242, 246, 245, 0.86);
}

/* ---------- 06 标准 ---------- */
.page-about .about-standards {
  background: linear-gradient(180deg, rgba(90, 31, 51, 0.66), var(--ink) 72%);
}

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

.page-about .std-item {
  padding: 18px 18px 20px;
  border-left: 3px solid var(--orange);
  border-radius: var(--r);
  background: rgba(7, 26, 43, 0.66);
  min-width: 0;
}

.page-about .std-item__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  color: var(--fog);
}

.page-about .std-item__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(242, 246, 245, 0.82);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding: clamp(40px, 6vw, 72px) 0 clamp(48px, 7vw, 84px);
  border-top: 1px solid var(--line);
  background: var(--ink);
}

.page-about .about-next__title {
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-family: var(--font-display);
  font-size: clamp(22px, 4vw, 32px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--fog);
}

.page-about .about-next__links {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-next__link {
  display: grid;
  gap: 4px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  text-decoration: none;
  background: rgba(13, 47, 56, 0.4);
  transition: border-color 0.22s ease, background 0.22s ease, transform 0.22s ease;
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  border-color: var(--grass);
  background: rgba(13, 47, 56, 0.78);
  transform: translateY(-2px);
}

.page-about .about-next__link-name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  color: var(--grass);
}

.page-about .about-next__link-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 桌面增强 ---------- */
@media (min-width: 760px) {
  .page-about .ab-head {
    grid-template-columns: 64px minmax(0, 1fr);
    column-gap: 16px;
    align-items: start;
  }

  .page-about .ab-head__idx {
    padding-top: 10px;
  }

  .page-about .ab-head__note {
    grid-column: 2;
  }

  .page-about .flow-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

  .page-about .cover-time {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
    gap: 10px;
  }

  .page-about .team-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .std-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-next__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    column-gap: clamp(30px, 5vw, 60px);
  }

  .page-about .about-start__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    column-gap: clamp(26px, 4vw, 52px);
    align-items: start;
  }

  .page-about .about-start__aside {
    padding: 26px 22px;
  }

  .page-about .about-cover__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    column-gap: clamp(24px, 4vw, 44px);
    align-items: start;
  }

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

  .page-about .flow-step {
    padding: 24px 18px 18px;
  }

  .page-about .timeline-wrap {
    grid-template-columns: 140px minmax(0, 1fr);
    column-gap: clamp(24px, 4vw, 56px);
  }

  .page-about .year-rail {
    position: sticky;
    top: 110px;
    align-self: start;
  }

  .page-about .year-rail__list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .year-rail__link {
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    padding: 4px 0 4px 14px;
    font-size: 22px;
    letter-spacing: -0.02em;
  }

  .page-about .year-rail__link:hover,
  .page-about .year-rail__link:focus-visible {
    border-left-color: var(--grass);
  }

  .page-about .about-cover__media {
    position: sticky;
    top: 110px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .flow-step,
  .page-about .tl-node,
  .page-about .about-next__link {
    transition: none;
  }

  .page-about .flow-step:hover,
  .page-about .flow-step:focus-within,
  .page-about .about-next__link:hover,
  .page-about .about-next__link:focus-visible {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>