.page-about {
  --about-navy-1: #0d2440;
  --about-navy-2: #0a1d36;
  --about-navy-3: #071325;
  --about-grid-line: rgba(240, 244, 248, 0.028);
}

.page-about .section-title {
  margin-bottom: 14px;
}

.page-about__hero {
  position: relative;
  padding: 24px 0 48px;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(245, 185, 66, 0.07) 0%, transparent 34%),
    radial-gradient(circle at 86% 22%, rgba(211, 47, 47, 0.16), transparent 40%),
    linear-gradient(180deg, rgba(7, 19, 37, 0.35), transparent 70%);
}

.page-about__hero::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 220px;
  background-image:
    linear-gradient(var(--about-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid-line) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.page-about__hero::after {
  content: "";
  position: absolute;
  right: -70px;
  top: 48px;
  width: 240px;
  height: 240px;
  border: 1px solid var(--border-gold);
  transform: rotate(45deg);
  opacity: 0.45;
  pointer-events: none;
}

.page-about__hero-layout {
  display: grid;
  gap: 32px;
  align-items: center;
  margin-top: 30px;
  position: relative;
  z-index: 1;
}

.page-about__hero-eyebrow {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-gold);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-pill);
  padding: 6px 16px;
  margin-bottom: 16px;
  background: rgba(245, 185, 66, 0.05);
}

.page-about__hero h1 {
  margin: 0 0 16px;
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.15;
  letter-spacing: 0.02em;
  color: var(--c-light);
}

.page-about__hero-lead {
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-muted);
  max-width: 56ch;
  margin: 0 0 28px;
}

.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about__hero-board {
  position: relative;
  background: linear-gradient(160deg, rgba(18, 42, 74, 0.95), rgba(7, 19, 37, 0.9));
  border: 1px solid var(--border-gold);
  border-radius: var(--radius);
  padding: 20px 20px 16px;
  box-shadow: var(--shadow-float);
}

.page-about__hero-board::before {
  content: "CORE_STATS / 核心指标";
  position: absolute;
  top: -9px;
  left: 18px;
  padding: 2px 8px;
  background: var(--c-navy);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--c-gold);
  border: 1px solid var(--border-gold);
  border-radius: 2px;
}

.page-about__hero-board-head {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--c-light);
  margin-bottom: 16px;
}

.page-about__hero-board-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 24px;
}

.page-about__hero-board .data-label {
  font-size: 12px;
}

.page-about__hero-board .data-value {
  font-size: 26px;
  color: var(--c-gold);
}

.page-about__hero-board-foot {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--border-muted);
  font-size: 12px;
  color: var(--c-muted);
  line-height: 1.5;
}

.page-about__toc {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
  margin-top: 36px;
  padding: 14px 18px;
  border: 1px solid var(--border-muted);
  border-radius: var(--radius);
  background: rgba(7, 19, 37, 0.42);
  position: relative;
  z-index: 1;
}

.page-about__toc-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-gold);
  margin-right: 6px;
}

.page-about__toc a {
  font-size: 14px;
  color: var(--c-light);
  text-decoration: none;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  transition: color 0.2s var(--ease-out), background-color 0.2s var(--ease-out);
}

.page-about__toc a:hover {
  color: var(--c-gold);
  background: rgba(245, 185, 66, 0.08);
}

.page-about__story {
  padding: 56px 0;
  background: linear-gradient(180deg, var(--c-navy), var(--about-navy-1));
  border-top: 1px solid rgba(245, 185, 66, 0.08);
  border-bottom: 1px solid rgba(245, 185, 66, 0.08);
}

.page-about__story-grid {
  display: grid;
  gap: 32px;
  align-items: center;
  margin-top: 32px;
}

.page-about__story-copy p {
  line-height: 1.8;
  color: var(--c-muted);
  margin-bottom: 16px;
}

.page-about__story-copy p:first-of-type {
  color: var(--c-light);
  font-size: 18px;
  font-weight: 600;
}

.page-about__story-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--border-muted);
}

.page-about__story-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--c-gold);
}

.page-about__story-label {
  display: block;
  font-size: 13px;
  color: var(--c-muted);
  margin-top: 4px;
}

.page-about__story-figure {
  margin: 0;
  position: relative;
}

.page-about__story-img,
.page-about__timeline-img,
.page-about__credential-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--border-muted);
  border-radius: var(--radius);
}

.page-about__story-figure figcaption,
.page-about__timeline-note figcaption,
.page-about__credential-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--c-muted);
  text-align: right;
  padding-right: 6px;
}

.page-about__milestones {
  padding: 56px 0;
  background: linear-gradient(0deg, var(--about-navy-3), var(--c-navy));
}

.page-about__milestones .container {
  position: relative;
}

.page-about__section-lead {
  margin: 18px 0 0;
  color: var(--c-muted);
  max-width: 62ch;
  line-height: 1.7;
  font-size: 16px;
}

.page-about__timeline {
  position: relative;
  margin-top: 34px;
}

.page-about__timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 8px;
  width: 2px;
  background: linear-gradient(to bottom, transparent, var(--border-gold) 6%, var(--border-gold) 94%, transparent);
}

.page-about__milestone {
  position: relative;
  padding: 18px 0 18px 40px;
}

.page-about__milestone-marker {
  position: absolute;
  top: 32px;
  left: 1px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--c-red);
  border: 3px solid var(--c-navy);
  box-shadow: 0 0 0 3px var(--border-gold), 0 0 12px rgba(211, 47, 47, 0.4);
  z-index: 1;
}

.page-about__milestone-card {
  margin: 0;
}

.page-about__milestone-card h3 {
  margin: 12px 0 8px;
  font-size: 20px;
  color: var(--c-light);
}

.page-about__milestone-card p {
  margin: 0;
  line-height: 1.75;
  color: var(--c-muted);
  font-size: 15px;
}

.page-about__timeline-note {
  margin: 34px 0 0;
}

.page-about__timeline-note img {
  max-height: 380px;
}

.page-about__team {
  padding: 56px 0;
  background: linear-gradient(180deg, var(--about-navy-1), var(--c-navy));
}

.page-about__team-map {
  position: relative;
  display: grid;
  gap: 24px;
  margin-top: 38px;
}

.page-about__team-card {
  position: relative;
  text-align: center;
  padding: 30px 22px 26px;
  background: rgba(18, 42, 74, 0.82);
  border: 1px solid var(--border-muted);
  border-radius: var(--radius);
  transition: border-color 0.25s var(--ease-out), transform 0.25s var(--ease-out);
}

.page-about__team-card:hover {
  border-color: var(--border-gold);
  transform: translateY(-4px);
}

.page-about__team-orb {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: var(--c-navy);
  border: 2px solid var(--border-gold);
  color: var(--c-gold);
  box-shadow: 0 0 0 4px rgba(245, 185, 66, 0.08);
}

.page-about__team-card h3 {
  margin: 0 0 4px;
  font-size: 20px;
  color: var(--c-light);
}

.page-about__team-count {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--c-red);
}

.page-about__team-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-about__credential {
  padding: 56px 0;
  background:
    linear-gradient(90deg, rgba(245, 185, 66, 0.025) 0%, transparent 55%),
    linear-gradient(180deg, var(--about-navy-3), var(--c-navy));
}

.page-about__credential-wrap {
  display: grid;
  gap: 32px;
  margin-top: 34px;
}

.page-about__credential-grid {
  display: grid;
  gap: 20px;
}

.page-about__credential-item {
  padding: 26px 22px;
  background: rgba(18, 42, 74, 0.8);
  border: 1px solid var(--border-muted);
  border-radius: var(--radius);
}

.page-about__credential-item--honor {
  background: linear-gradient(135deg, rgba(245, 185, 66, 0.1), rgba(18, 42, 74, 0.8));
  border-color: var(--border-gold);
}

.page-about__credential-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin-bottom: 18px;
  border-radius: 50%;
  border: 2px solid var(--c-gold);
  color: var(--c-gold);
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  background: rgba(245, 185, 66, 0.06);
  box-shadow: inset 0 0 0 3px rgba(245, 185, 66, 0.1), 0 0 16px rgba(245, 185, 66, 0.08);
}

.page-about__credential-item h3 {
  margin: 0 0 8px;
  font-size: 18px;
  color: var(--c-light);
}

.page-about__credential-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-about__credential-figure {
  margin: 0;
}

.page-about__credential-img {
  max-height: 320px;
}

.page-about__eco {
  padding: 56px 0;
  background: linear-gradient(180deg, var(--c-navy), var(--about-navy-3));
  border-top: 1px solid rgba(245, 185, 66, 0.08);
}

.page-about__eco-grid {
  display: grid;
  gap: 20px;
  margin-top: 34px;
}

.page-about__eco-card {
  position: relative;
}

.page-about__eco-card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  color: var(--c-light);
}

.page-about__eco-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-muted);
}

.page-about__eco-idx {
  position: absolute;
  top: 18px;
  right: 20px;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: rgba(245, 185, 66, 0.22);
  pointer-events: none;
}

.page-about__eco-cta {
  margin-top: 40px;
  padding: 28px 22px;
  text-align: center;
  border: 1px dashed var(--border-gold);
  border-radius: var(--radius);
  background: rgba(245, 185, 66, 0.03);
}

.page-about__eco-cta p {
  margin: 0 0 20px;
  color: var(--c-light);
  font-size: 18px;
  font-weight: 600;
}

.page-about__eco-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

@media (min-width: 768px) {
  .page-about__hero {
    padding: 28px 0 56px;
  }

  .page-about__hero-layout {
    grid-template-columns: 1.18fr 0.82fr;
    gap: 48px;
    margin-top: 40px;
  }

  .page-about__hero-lead {
    font-size: 18px;
  }

  .page-about__hero-board {
    padding: 26px 24px 20px;
  }

  .page-about__story,
  .page-about__milestones,
  .page-about__team,
  .page-about__credential,
  .page-about__eco {
    padding: 72px 0;
  }

  .page-about__story-grid {
    grid-template-columns: 1fr 0.88fr;
    gap: 56px;
  }

  .page-about__timeline {
    padding-left: 0;
  }

  .page-about__timeline::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about__milestone {
    width: 50%;
    padding: 24px 0;
  }

  .page-about__milestone--left {
    padding-right: 48px;
    padding-left: 0;
  }

  .page-about__milestone--right {
    margin-left: 50%;
    padding-left: 48px;
  }

  .page-about__milestone-marker {
    top: 38px;
  }

  .page-about__milestone--left .page-about__milestone-marker {
    left: auto;
    right: -7px;
  }

  .page-about__milestone--right .page-about__milestone-marker {
    left: -7px;
  }

  .page-about__team-map {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }

  .page-about__team-map::before {
    content: "";
    position: absolute;
    top: 32px;
    left: calc(16.666% - 11px);
    right: calc(16.666% - 11px);
    height: 2px;
    background: var(--border-gold);
    opacity: 0.55;
  }

  .page-about__credential-wrap {
    grid-template-columns: 1fr 0.85fr;
    gap: 48px;
    align-items: center;
  }

  .page-about__credential-grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  .page-about__credential-figure img {
    max-height: 360px;
  }

  .page-about__eco-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about__eco-cta {
    padding: 34px;
  }
}

@media (min-width: 1024px) {
  .page-about__hero-layout {
    gap: 64px;
  }

  .page-about__story-grid {
    gap: 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
  }
}