.page-about {
  --about-body: #C3CCE0;
  --about-panel: var(--ink-800);
  color: var(--text);
  padding-bottom: clamp(40px, 6vw, 88px);
  overflow-x: clip;
}

.page-about .breadcrumb {
  padding-top: 14px;
}

/* ---------- 开场 ---------- */
.page-about .about-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  padding-block: clamp(20px, 4vw, 48px) clamp(26px, 4vw, 48px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -8% -24% 30% -18%;
  background:
    radial-gradient(46% 60% at 16% 14%, rgba(255, 77, 26, 0.2), transparent 70%),
    radial-gradient(42% 56% at 84% 26%, rgba(0, 229, 255, 0.14), transparent 72%);
  filter: blur(6px);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero > * {
  position: relative;
  z-index: 1;
  min-width: 0;
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  padding: 6px 14px;
  border: 1px solid rgba(0, 229, 255, 0.35);
  border-radius: var(--radius-pill);
  background: rgba(0, 229, 255, 0.08);
  color: var(--arc);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-about .about-title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 7.2vw, 68px);
  line-height: 1.03;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.page-about .about-title em {
  display: block;
  font-style: normal;
  color: var(--signal);
}

.page-about .about-lede {
  max-width: 56ch;
  margin: 0 0 24px;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.72;
  color: var(--about-body);
}

.page-about .about-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin: 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-about .about-meta li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 12px;
  color: var(--text-dim);
}

.page-about .about-meta b {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  color: var(--text);
}

.page-about .about-meta b.is-gold {
  color: var(--gold);
}

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

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  object-fit: cover;
  filter: saturate(0.82) contrast(1.02);
}

.page-about .about-hero__figure .media-frame__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

/* ---------- 骨架 ---------- */
.page-about .about-frame {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  margin-top: clamp(8px, 2vw, 20px);
}

.page-about .index-rail {
  position: relative;
  min-width: 0;
}

.page-about .index-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-dim);
}

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

.page-about .index-rail__list a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--text-dim);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .index-rail__list a:hover,
.page-about .index-rail__list a:focus-visible {
  color: var(--text);
  border-color: var(--arc);
}

.page-about .index-rail__list a[aria-current="true"] {
  color: #fff;
  border-color: var(--signal);
  background: rgba(255, 77, 26, 0.16);
}

.page-about .about-stage {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  min-width: 0;
}

/* ---------- 画板 ---------- */
.page-about .panel {
  position: relative;
  min-width: 0;
  padding: clamp(18px, 3.2vw, 34px);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(165deg, rgba(31, 42, 74, 0.55), var(--about-panel) 55%);
  box-shadow: inset 0 0 0 1px rgba(244, 246, 251, 0.03);
}

.page-about .panel--offset {
  background: linear-gradient(165deg, rgba(0, 229, 255, 0.07), var(--about-panel) 48%);
}

.page-about .panel__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 14px;
}

.page-about .panel__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--signal);
}

.page-about .panel__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 600;
  line-height: 1.28;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-about .panel__title--display {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.01em;
  font-size: clamp(22px, 3vw, 32px);
}

.page-about .panel__body p {
  margin: 0 0 0.85em;
  font-size: 15px;
  line-height: 1.7;
  color: var(--about-body);
}

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

.page-about .panel__body a {
  color: var(--arc);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.4);
}

.page-about .panel__body a:hover,
.page-about .panel__body a:focus-visible {
  color: #fff;
  border-bottom-color: var(--signal);
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  position: relative;
  display: grid;
  gap: clamp(16px, 2.6vw, 26px);
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--arc), var(--signal) 58%, var(--gold));
  opacity: 0.6;
}

.page-about .timeline__item {
  position: relative;
  padding-left: 38px;
}

.page-about .timeline__node {
  position: absolute;
  left: 0;
  top: 1px;
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border: 2px solid var(--signal);
  border-radius: 50%;
  background: var(--ink-900);
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-about .timeline__node::after {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--signal);
}

.page-about .timeline__node:hover,
.page-about .timeline__node:focus-visible {
  transform: scale(1.28);
  box-shadow: 0 0 0 6px rgba(255, 77, 26, 0.18);
}

.page-about .timeline__year {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-about .timeline__title {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 600;
  color: var(--text);
}

.page-about .timeline__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.68;
  color: var(--about-body);
}

/* ---------- 图 ---------- */
.page-about .about-figure {
  margin: 20px 0 22px;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.page-about .about-figure figcaption {
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

/* ---------- 对照表 ---------- */
.page-about .compare {
  margin-top: 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(11, 16, 32, 0.55);
}

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

.page-about .compare__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding: 16px;
  border-top: 1px solid var(--line);
  transition: background 180ms var(--ease);
}

.page-about .compare__row:first-of-type {
  border-top: 0;
}

.page-about .compare__row:hover,
.page-about .compare__row:focus-within {
  background: rgba(255, 77, 26, 0.07);
}

.page-about .compare__item {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .compare__dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 4px rgba(255, 77, 26, 0.16);
}

.page-about .compare__name {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.page-about .compare__cell {
  font-size: 14px;
  line-height: 1.62;
  color: var(--text);
}

.page-about .compare__cell::before {
  content: attr(data-label);
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.page-about .compare__cell--old {
  padding: 10px 12px;
  border-radius: var(--radius-md);
  color: var(--legacy);
  filter: grayscale(1);
  background-image: repeating-linear-gradient(
    135deg,
    rgba(244, 246, 251, 0.05) 0 1px,
    transparent 1px 7px
  );
}

.page-about .compare__cell--new {
  padding: 10px 12px;
  border-left: 2px solid rgba(0, 229, 255, 0.5);
  border-radius: var(--radius-md);
  background: rgba(0, 229, 255, 0.05);
}

/* ---------- 迁移路径 ---------- */
.page-about .migrate {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: mig;
}

.page-about .migrate__item {
  counter-increment: mig;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(31, 42, 74, 0.38);
}

.page-about .migrate__item::before {
  content: counter(mig, decimal-leading-zero);
  padding-top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--arc);
}

.page-about .migrate__item strong {
  display: block;
  margin-bottom: 4px;
  font-size: 14.5px;
  color: var(--text);
}

.page-about .migrate__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.66;
  color: var(--about-body);
}

.page-about .about-hint {
  margin-top: 18px;
  padding: 12px 14px;
  border-left: 2px solid var(--gold);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: rgba(255, 179, 0, 0.07);
  font-size: 14px;
  line-height: 1.66;
  color: var(--about-body);
}

/* ---------- 团队 ---------- */
.page-about .team {
  display: grid;
  gap: clamp(16px, 3vw, 26px);
}

.page-about .team__figure {
  margin: 0 0 4px;
}

.page-about .team__figure img {
  filter: saturate(0.72) contrast(1.04);
}

.page-about .team__groups {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-top: 16px;
}

.page-about .team__group {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(31, 42, 74, 0.35);
}

.page-about .team__group h3 {
  margin: 0 0 5px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--arc);
}

.page-about .team__group p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--about-body);
}

/* ---------- 协作 ---------- */
.page-about .ecosystem {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 18px;
}

.page-about .eco-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: linear-gradient(160deg, rgba(255, 77, 26, 0.1), rgba(20, 27, 51, 0.92));
}

.page-about .eco-card b {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  color: var(--gold);
}

.page-about .eco-card span {
  font-size: 13px;
  line-height: 1.55;
  color: var(--about-body);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 18px;
  padding: clamp(20px, 4vw, 38px);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(120deg, rgba(255, 77, 26, 0.18), rgba(0, 229, 255, 0.1) 58%, transparent);
}

.page-about .about-cta__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3vw, 30px);
  letter-spacing: -0.01em;
  line-height: 1.2;
  color: var(--text);
}

.page-about .about-cta__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.66;
  color: var(--about-body);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .team__groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 640px) {
  .page-about .ecosystem {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .team {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: start;
  }

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

@media (min-width: 860px) {
  .page-about .compare__head {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.15fr) minmax(0, 1.25fr);
    gap: 18px;
    position: sticky;
    top: var(--header-h);
    z-index: 2;
    padding: 12px 20px;
    border-bottom: 1px solid var(--line);
    background: var(--ink-700);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-dim);
  }

  .page-about .compare__head-new {
    color: var(--arc);
  }

  .page-about .compare__row {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.15fr) minmax(0, 1.25fr);
    gap: 18px;
    align-items: start;
    padding: 16px 20px;
  }

  .page-about .compare__cell::before {
    display: none;
  }

  .page-about .compare__item {
    align-items: flex-start;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: end;
  }
}

@media (min-width: 1024px) {
  .page-about .about-frame {
    grid-template-columns: var(--rail) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .index-rail {
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
  }

  .page-about .index-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .index-rail__list a {
    position: relative;
    justify-content: flex-start;
    min-height: 44px;
    padding: 8px 12px 8px 22px;
    border: 0;
    border-radius: var(--radius-md);
    white-space: normal;
    line-height: 1.4;
  }

  .page-about .index-rail__list a::before {
    content: "";
    position: absolute;
    left: 5px;
    top: 50%;
    width: 6px;
    height: 6px;
    margin-top: -3px;
    border-radius: 50%;
    background: var(--line);
    transition: background 180ms var(--ease), box-shadow 180ms var(--ease);
  }

  .page-about .index-rail__list a[aria-current="true"]::after {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    bottom: 10px;
    width: 3px;
    border-radius: 2px;
    background: var(--signal);
  }

  .page-about .index-rail__list a[aria-current="true"]::before {
    background: var(--signal);
    box-shadow: 0 0 0 4px rgba(255, 77, 26, 0.18);
  }

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

@media (min-width: 1080px) {
  .page-about .ecosystem {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline__node,
  .page-about .index-rail__list a,
  .page-about .compare__row {
    transition: none;
  }
}
<<<END>>>