.page-about {
  background: var(--abyss-900);
  color: var(--ivory-100);
  overflow-x: hidden;
}

.page-about .ghost-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(44px, 12vw, 108px);
  line-height: 0.82;
  letter-spacing: 0.04em;
  color: var(--gold-500);
  opacity: 0.3;
  margin-bottom: 10px;
}

.page-about .about-link {
  color: var(--gold-200);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-line-strong);
  padding-bottom: 1px;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--gold-500);
  border-bottom-color: var(--gold-500);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 28px;
  background:
    radial-gradient(120% 90% at 88% 8%, rgba(46, 125, 111, 0.22), transparent 62%),
    radial-gradient(90% 70% at 4% 0%, rgba(184, 58, 46, 0.14), transparent 58%),
    var(--abyss-900);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 34px;
  margin-top: 26px;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
}

.page-about .about-hero__side {
  margin: 18px 0 0;
  color: var(--mist-400);
}

.page-about .about-hero__figure {
  margin: 26px 0 0;
}

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

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  margin: 26px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--gold-line);
}

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

.page-about .about-hero__facts dt {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  color: var(--gold-200);
  letter-spacing: 0.02em;
}

.page-about .about-hero__facts dd {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist-400);
}

/* ---------- 品牌自述 ---------- */
.page-about .about-statement__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-statement__main p {
  margin: 0 0 18px;
}

.page-about .about-statement__main p:last-of-type {
  margin-bottom: 0;
}

.page-about .about-statement__list {
  list-style: none;
  margin: 28px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--gold-line);
  display: grid;
  gap: 14px;
}

.page-about .about-statement__list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist-400);
}

.page-about .about-statement__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cinnabar-600);
}

.page-about .about-statement__list strong {
  color: var(--ivory-100);
  font-weight: 600;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  background:
    linear-gradient(180deg, var(--abyss-900) 0%, var(--abyss-700) 72%, var(--abyss-900) 100%);
}

.page-about .about-timeline__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-timeline__aside p {
  margin: 16px 0 0;
  max-width: 36ch;
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 2px 0 0;
  position: relative;
  display: grid;
  gap: 30px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--patina-500) 0%, var(--gold-500) 100%);
  opacity: 0.55;
}

.page-about .timeline__node {
  position: relative;
  padding-left: 46px;
  min-width: 0;
}

.page-about .timeline__coin {
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--patina-500);
  display: grid;
  place-items: center;
}

.page-about .timeline__coin::after {
  content: "";
  width: 9px;
  height: 9px;
  background: var(--abyss-900);
}

.page-about .timeline__node--now .timeline__coin {
  background: var(--gold-500);
  box-shadow: 0 0 0 4px rgba(216, 162, 74, 0.16), 0 0 22px rgba(216, 162, 74, 0.48);
}

.page-about .timeline__meta {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold-500);
  margin-bottom: 6px;
}

.page-about .timeline__title {
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1.45;
  margin: 0 0 8px;
  color: var(--ivory-100);
}

.page-about .timeline__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--mist-400);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-team__figure {
  aspect-ratio: 1 / 1;
  margin: 0;
}

.page-about .about-team__body h2 {
  margin: 12px 0 18px;
}

.page-about .about-team__body p {
  margin: 0 0 16px;
}

.page-about .team-stats {
  list-style: none;
  margin: 24px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--gold-line);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.page-about .team-stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .team-stats .stat-num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 600;
  color: var(--gold-200);
  letter-spacing: 0.01em;
}

.page-about .team-stats .stat-label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist-400);
}

.page-about .about-team__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 0;
}

/* ---------- 三条线 ---------- */
.page-about .about-lines__head {
  max-width: 62ch;
}

.page-about .about-lines__head h2 {
  margin: 12px 0 16px;
}

.page-about .lines {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}

.page-about .line {
  position: relative;
  padding: 26px 22px 24px;
  border-radius: var(--radius-card);
  border: 1px solid var(--glass-line);
  background: rgba(12, 36, 56, 0.7);
  overflow: hidden;
  transition: transform 220ms var(--ease-out), border-color 220ms var(--ease-out);
}

.page-about .line::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  opacity: 0.85;
}

.page-about .line--support {
  background: linear-gradient(158deg, rgba(184, 58, 46, 0.24), rgba(12, 36, 56, 0.92) 68%);
}

.page-about .line--support::after {
  background: var(--cinnabar-600);
}

.page-about .line--docs {
  background: linear-gradient(158deg, rgba(216, 162, 74, 0.18), rgba(12, 36, 56, 0.92) 68%);
}

.page-about .line--docs::after {
  background: var(--gold-500);
}

.page-about .line--device {
  background: linear-gradient(158deg, rgba(46, 125, 111, 0.26), rgba(12, 36, 56, 0.92) 68%);
}

.page-about .line--device::after {
  background: var(--patina-500);
}

.page-about .line:hover,
.page-about .line:focus-within {
  transform: translateY(-4px);
  border-color: var(--gold-line-strong);
}

.page-about .line__index {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold-500);
}

.page-about .line__title {
  font-family: var(--font-display);
  font-size: 22px;
  margin: 0 0 10px;
  color: var(--ivory-100);
}

.page-about .line__text {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist-400);
}

.page-about .line__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
  border-top: 1px solid var(--gold-line);
  padding-top: 16px;
}

.page-about .line__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ivory-100);
}

.page-about .line__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 6px;
  height: 6px;
  background: var(--gold-500);
  opacity: 0.75;
}

.page-about .line__link {
  display: inline-block;
  margin-top: 18px;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--gold-200);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-line-strong);
  padding-bottom: 2px;
}

.page-about .line__link:hover,
.page-about .line__link:focus-visible {
  color: var(--gold-500);
  border-bottom-color: var(--gold-500);
}

/* ---------- 视觉原则 ---------- */
.page-about .about-visual__head {
  max-width: 64ch;
}

.page-about .about-visual__head h2 {
  margin: 12px 0 16px;
}

.page-about .about-visual__figure {
  margin: 30px 0 0;
}

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.page-about .filter-btn {
  appearance: none;
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.06em;
  line-height: 1;
  padding: 11px 16px;
  border-radius: 999px;
  border: 1px solid var(--glass-line);
  background: rgba(6, 20, 32, 0.6);
  color: var(--mist-400);
  transition: color 180ms var(--ease-out), border-color 180ms var(--ease-out), background 180ms var(--ease-out);
}

.page-about .filter-btn:hover,
.page-about .filter-btn:focus-visible {
  color: var(--ivory-100);
  border-color: var(--gold-line-strong);
}

.page-about .filter-btn[aria-pressed="true"] {
  color: var(--ivory-100);
  border-color: var(--cinnabar-600);
  background: rgba(184, 58, 46, 0.28);
}

.page-about .motif-grid {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .motif {
  padding: 22px 20px;
  border-left: 2px solid var(--gold-line-strong);
  background: rgba(6, 20, 32, 0.46);
}

.page-about .motif__glyph {
  display: block;
  position: relative;
  width: 42px;
  height: 42px;
  margin-bottom: 16px;
  border-radius: 50%;
  border: 1px solid var(--gold-line-strong);
}

.page-about .motif__glyph::after {
  content: "";
  position: absolute;
  inset: 13px;
  background: var(--gold-500);
}

.page-about .motif__glyph--coin::after {
  background: var(--gold-500);
}

.page-about .motif__glyph--tide {
  border-radius: 4px 14px 4px 14px;
}

.page-about .motif__glyph--tide::after {
  inset: 15px 8px;
  background: var(--patina-500);
}

.page-about .motif__glyph--fish::after {
  inset: 16px 6px;
  border-radius: 50% 0 50% 0;
  background: var(--cinnabar-600);
}

.page-about .motif__glyph--hat::after {
  inset: 14px 10px 12px;
  clip-path: polygon(50% 0, 100% 100%, 0 100%);
  background: var(--mist-400);
}

.page-about .motif__glyph--badge::after {
  inset: 12px;
  border-radius: 50%;
  background: var(--gold-200);
  box-shadow: 0 0 16px rgba(242, 217, 160, 0.45);
}

.page-about .motif__title {
  font-family: var(--font-display);
  font-size: 18px;
  margin: 0 0 8px;
  color: var(--ivory-100);
}

.page-about .motif__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist-400);
}

.page-about .filter-empty {
  margin: 0;
  font-size: 14px;
  color: var(--mist-400);
}

/* ---------- 收尾去向 ---------- */
.page-about .about-next {
  background: linear-gradient(112deg, var(--abyss-700) 0%, #123f3c 58%, var(--patina-500) 100%);
}

.page-about .about-next__title {
  font-family: var(--font-display);
  font-size: 24px;
  line-height: 1.4;
  margin: 0 0 22px;
  color: var(--ivory-100);
}

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

.page-about .about-next__link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 18px;
  border-radius: 14px;
  background: rgba(4, 16, 26, 0.38);
  border: 1px solid var(--glass-line);
  text-decoration: none;
  transition: background 200ms var(--ease-out), border-color 200ms var(--ease-out);
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  background: rgba(4, 16, 26, 0.62);
  border-color: var(--gold-line-strong);
}

.page-about .about-next__label {
  font-size: 16px;
  font-weight: 600;
  color: var(--gold-200);
  letter-spacing: 0.03em;
}

.page-about .about-next__desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist-400);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero { padding-top: 40px; }

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

  .page-about .about-statement__grid,
  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .timeline {
    gap: 34px;
  }

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

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

  .page-about .line--support {
    grid-column: 1 / -1;
  }

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

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

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-hero__aside {
    position: sticky;
    top: 48px;
  }

  .page-about .about-statement__grid {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    gap: 72px;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    gap: 64px;
    align-items: start;
  }

  .page-about .about-timeline__aside {
    position: sticky;
    top: 56px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    gap: 64px;
    align-items: center;
  }

  .page-about .lines {
    grid-template-columns: 4fr 3fr 3fr;
    gap: 18px;
    align-items: stretch;
  }

  .page-about .line--support {
    grid-column: auto;
  }

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

  .page-about .motif-grid .motif:last-of-type {
    grid-column: span 1;
  }

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

  .page-about .about-next__title {
    font-size: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .line,
  .page-about .filter-btn,
  .page-about .about-next__link {
    transition: none;
  }

  .page-about .line:hover,
  .page-about .line:focus-within {
    transform: none;
  }
}
<<<END>>>