.page-about {
  position: relative;
  background:
    radial-gradient(1200px 600px at 82% -100px, rgba(57, 255, 136, 0.07), transparent 60%),
    radial-gradient(800px 500px at 8% 36%, rgba(255, 107, 44, 0.045), transparent 55%),
    linear-gradient(180deg, rgba(18, 11, 38, 0.25), transparent 320px),
    var(--fh-bg-deep);
}

.page-about .fh-breadcrumb {
  padding-top: 24px;
  font-size: 0.875rem;
}

.page-about .ab-hero {
  padding: 40px 0 16px;
  position: relative;
}

.page-about .ab-hero::after {
  content: "";
  display: block;
  height: 1px;
  margin-top: 18px;
  background: linear-gradient(90deg, var(--fh-green), var(--fh-border) 34%, transparent 82%);
}

.page-about .ab-hero-kicker {
  margin: 0 0 12px;
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--fh-green);
  text-transform: uppercase;
}

.page-about .ab-hero-title {
  margin: 0 0 24px;
  font-family: var(--fh-font-display);
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: var(--fh-text);
}

.page-about .ab-hero-title span {
  display: block;
  margin-top: 8px;
  font-size: clamp(1.1rem, 2.4vw, 1.75rem);
  font-weight: 700;
  color: var(--fh-data);
}

.page-about .ab-hero-grid {
  display: grid;
  gap: 20px;
}

.page-about .ab-hero-lead {
  max-width: 62ch;
  margin: 0;
  font-size: 1rem;
  line-height: 1.9;
  color: rgba(226, 232, 228, 0.82);
}

.page-about .ab-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  font-size: 0.875rem;
}

.page-about .ab-layout {
  display: block;
  padding-top: 8px;
  padding-bottom: 80px;
}

.page-about .ab-main {
  display: grid;
  gap: 64px;
}

.page-about .ab-profile {
  margin-bottom: 48px;
}

.page-about .ab-profile-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--fh-border);
  border-radius: var(--fh-radius);
  background: linear-gradient(160deg, var(--fh-bg-indigo) 0%, rgba(18, 11, 38, 0.82) 100%);
  box-shadow: var(--fh-shadow);
}

.page-about .ab-profile-card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(86% 42% at 50% 0%, rgba(57, 255, 136, 0.09), transparent 70%);
}

.page-about .ab-profile-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--fh-green), rgba(57, 255, 136, 0.12), transparent);
}

.page-about .ab-profile-body {
  padding: 24px 24px 4px;
}

.page-about .ab-profile-label {
  margin: 0 0 8px;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: rgba(160, 240, 208, 0.68);
}

.page-about .ab-profile-desc {
  margin: 0 0 18px;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--fh-text);
}

.page-about .ab-profile-stats {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 16px;
  padding: 16px 0 0;
  border-top: 1px solid var(--fh-border);
}

.page-about .ab-profile-stats div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .ab-profile-stats dt {
  font-size: 0.75rem;
  color: rgba(160, 240, 208, 0.58);
}

.page-about .ab-profile-stats dd {
  margin: 0;
  font-size: 1.25rem;
  letter-spacing: 0.02em;
  color: var(--fh-data);
}

.page-about .ab-profile-footer {
  padding: 18px 24px 24px;
}

.page-about .ab-profile-footer .fh-btn {
  width: 100%;
  justify-content: center;
}

.page-about .ab-media {
  position: relative;
  overflow: hidden;
}

.page-about .ab-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .ab-media-16x9 {
  aspect-ratio: 16 / 9;
}

.page-about .ab-media-3x2 {
  aspect-ratio: 3 / 2;
}

.page-about .ab-profile-img {
  border-bottom: 1px solid var(--fh-border);
}

.page-about .ab-timeline-img {
  max-width: 420px;
  margin-top: 12px;
  border: 1px solid var(--fh-border);
  border-radius: var(--fh-radius-sm);
}

.page-about .ab-team-img {
  margin: 32px 0 24px;
  border: 1px solid var(--fh-border);
  border-radius: var(--fh-radius);
}

.page-about .ab-timeline-list {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
  position: relative;
}

.page-about .ab-timeline-list::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(to bottom, var(--fh-green), var(--fh-border) 72%, transparent);
  opacity: 0.6;
}

.page-about .ab-timeline-item {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 44px;
}

.page-about .ab-timeline-item:last-child {
  padding-bottom: 0;
}

.page-about .ab-timeline-marker {
  position: relative;
  z-index: 1;
  padding-top: 2px;
}

.page-about .ab-timeline-dot {
  display: block;
  width: 12px;
  height: 12px;
  margin-top: 6px;
  border-radius: 50%;
  background: var(--fh-green);
  box-shadow:
    0 0 0 4px rgba(57, 255, 136, 0.14),
    0 0 12px rgba(57, 255, 136, 0.4);
}

.page-about .ab-timeline-body {
  min-width: 0;
}

.page-about .ab-timeline-year {
  display: inline-block;
  margin: 0 0 6px;
  padding: 3px 10px;
  border: 1px solid rgba(255, 107, 44, 0.35);
  border-radius: 999px;
  color: var(--fh-orange);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
}

.page-about .ab-timeline-title {
  margin: 0 0 10px;
  font-family: var(--fh-font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--fh-text);
}

.page-about .ab-timeline-text {
  margin: 0 0 10px;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: rgba(226, 232, 228, 0.8);
}

.page-about .ab-timeline-detail {
  margin: 10px 0 0;
  border: 1px solid var(--fh-border);
  border-radius: var(--fh-radius-sm);
  background: rgba(255, 255, 255, 0.025);
}

.page-about .ab-timeline-detail summary {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  cursor: pointer;
  list-style: none;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--fh-green);
}

.page-about .ab-timeline-detail summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-timeline-detail summary::before {
  content: "+";
  font-family: var(--fh-font-data);
  font-size: 1rem;
  line-height: 1;
  color: var(--fh-orange);
}

.page-about .ab-timeline-detail[open] summary::before {
  content: "−";
  color: var(--fh-green);
}

.page-about .ab-timeline-detail p {
  margin: 0;
  padding: 0 14px 14px;
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(226, 232, 228, 0.72);
}

.page-about .ab-timeline-more {
  margin: 28px 0 0;
  padding: 16px 20px;
  border-left: 3px solid var(--fh-green);
  border-radius: 0 12px 12px 0;
  background: rgba(57, 255, 136, 0.05);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--fh-text);
}

.page-about .ab-timeline-more a {
  color: var(--fh-green);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-about .ab-map-visual {
  margin: 32px 0 24px;
  padding: 16px 8px 8px;
  border: 1px solid var(--fh-border);
  border-radius: var(--fh-radius);
  background: radial-gradient(80% 70% at 50% 30%, rgba(57, 255, 136, 0.05), transparent 70%);
}

.page-about .ab-map-svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .ab-map-hot-item {
  cursor: default;
}

.page-about .ab-map-core {
  fill: var(--fh-orange);
  transform-origin: center;
  transform-box: fill-box;
  transition: transform 0.2s ease;
}

.page-about .ab-map-hot-item:hover .ab-map-core {
  transform: scale(1.5);
}

.page-about .ab-map-pulse {
  fill: rgba(255, 107, 44, 0.2);
  transform-origin: center;
  transform-box: fill-box;
  animation: ab-pulse 2.6s ease-out infinite;
}

.page-about .ab-map-hot-item:hover .ab-map-pulse {
  animation-duration: 1.4s;
}

@keyframes ab-pulse {
  0% {
    transform: scale(0.4);
    opacity: 0.8;
  }
  70% {
    transform: scale(1.8);
    opacity: 0;
  }
  100% {
    transform: scale(1.8);
    opacity: 0;
  }
}

.page-about .ab-map-caption {
  margin: 4px 0 0;
  text-align: center;
  font-size: 0.75rem;
  color: rgba(160, 240, 208, 0.55);
}

.page-about .ab-map-stats {
  gap: 12px;
}

.page-about .ab-stat-card {
  position: relative;
  overflow: hidden;
  padding: 22px 12px 20px;
  text-align: center;
  border-radius: var(--fh-radius);
}

.page-about .ab-stat-card::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--fh-green), transparent);
  opacity: 0.5;
}

.page-about .ab-stat-num {
  display: block;
  margin-bottom: 6px;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--fh-data);
}

.page-about .ab-stat-label {
  display: block;
  font-size: 0.875rem;
  color: rgba(226, 232, 228, 0.66);
}

.page-about .ab-team-grid {
  display: grid;
  gap: 16px;
  margin-bottom: 20px;
}

.page-about .ab-team-item {
  position: relative;
  padding: 24px;
  border-radius: var(--fh-radius);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .ab-team-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.4);
}

.page-about .ab-team-num {
  display: block;
  margin-bottom: 12px;
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  color: var(--fh-green);
}

.page-about .ab-team-item:nth-child(2) .ab-team-num {
  color: var(--fh-data);
}

.page-about .ab-team-item:nth-child(3) .ab-team-num {
  color: var(--fh-orange);
}

.page-about .ab-team-item h3 {
  margin: 0 0 8px;
  font-size: 1.125rem;
}

.page-about .ab-team-item p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: rgba(226, 232, 228, 0.7);
}

.page-about .ab-team-note {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--fh-border);
  font-size: 0.8125rem;
  line-height: 1.8;
  color: rgba(160, 240, 208, 0.65);
}

.page-about .ab-credential-grid {
  display: grid;
  gap: 16px;
  margin: 32px 0 20px;
}

.page-about .ab-cert {
  position: relative;
  overflow: hidden;
  padding: 28px 24px;
  border-radius: var(--fh-radius);
  background: linear-gradient(140deg, rgba(18, 11, 38, 0.5), rgba(8, 26, 23, 0.62));
}

.page-about .ab-cert::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(57, 255, 136, 0.08), transparent 70%);
}

.page-about .ab-cert-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  margin-bottom: 16px;
  border: 1px solid rgba(57, 255, 136, 0.18);
  border-radius: 16px;
  background: rgba(57, 255, 136, 0.08);
  color: var(--fh-green);
}

.page-about .ab-cert:nth-of-type(2) .ab-cert-icon {
  border-color: rgba(160, 240, 208, 0.18);
  background: rgba(160, 240, 208, 0.08);
  color: var(--fh-data);
}

.page-about .ab-cert:nth-of-type(3) .ab-cert-icon {
  border-color: rgba(255, 107, 44, 0.18);
  background: rgba(255, 107, 44, 0.08);
  color: var(--fh-orange);
}

.page-about .ab-cert h3 {
  margin: 0 0 8px;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--fh-text);
}

.page-about .ab-cert p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(226, 232, 228, 0.72);
}

.page-about .ab-credential-note {
  margin: 20px 0 0;
  padding: 14px 18px;
  border: 1px dashed rgba(255, 209, 102, 0.35);
  border-radius: var(--fh-radius-sm);
  background: rgba(255, 209, 102, 0.04);
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(255, 209, 102, 0.8);
}

.page-about .ab-credential-note p {
  margin: 0;
}

.page-about .ab-related {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

@media (min-width: 1024px) {
  .page-about .ab-hero {
    padding: 72px 0 32px;
  }

  .page-about .ab-hero-grid {
    grid-template-columns: 1fr auto;
    align-items: end;
    gap: 40px;
  }

  .page-about .ab-hero-lead {
    max-width: 62ch;
  }

  .page-about .ab-hero-meta {
    justify-content: flex-end;
  }

  .page-about .ab-layout {
    display: grid;
    grid-template-columns: 320px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
    padding-top: 16px;
  }

  .page-about .ab-profile {
    position: sticky;
    top: 104px;
    margin-bottom: 0;
  }

  .page-about .ab-main {
    gap: 80px;
  }

  .page-about .ab-map-stats,
  .page-about .ab-team-grid,
  .page-about .ab-credential-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .ab-map-stats {
    gap: 20px;
  }

  .page-about .ab-credential-grid {
    gap: 20px;
  }
}