.page-about {
  position: relative;
  isolation: isolate;
  overflow-x: hidden;
  background: linear-gradient(180deg, #F8FAFC 0%, #EEF2F7 100%);
  --ab-line: rgba(15, 43, 91, 0.14);
  --ab-card-bg: rgba(255, 255, 255, 0.72);
}

.page-about .ab-bg {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.page-about .ab-bg__shape {
  position: absolute;
  display: block;
  border-radius: 50%;
  filter: blur(72px);
  opacity: 0.32;
}

.page-about .ab-bg__shape--one {
  width: 420px;
  height: 420px;
  top: 6%;
  left: -140px;
  background: linear-gradient(135deg, #2563EB, #7C3AED);
}

.page-about .ab-bg__shape--two {
  width: 300px;
  height: 300px;
  top: 46%;
  right: -90px;
  background: linear-gradient(135deg, rgba(249, 115, 22, 0.55), rgba(244, 63, 94, 0.45));
}

.page-about .ab-bg__shape--three {
  width: 260px;
  height: 260px;
  bottom: 12%;
  left: 28%;
  background: linear-gradient(135deg, #7C3AED, #2563EB);
}

.page-about .breadcrumbs {
  margin-top: 24px;
}

.page-about .ab-hero {
  padding: 48px 0 40px;
}

.page-about .ab-hero h1 {
  max-width: 720px;
  margin-top: 12px;
  font-size: 34px;
  line-height: 1.25;
  color: #0F2B5B;
}

.page-about .ab-hero .lede {
  max-width: 640px;
  margin-top: 16px;
  font-size: 17px;
  line-height: 1.75;
  color: #4a5568;
}

.page-about .ab-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-top: 24px;
}

.page-about .ab-index {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(15, 43, 91, 0.12);
  border-radius: 20px;
  backdrop-filter: blur(8px);
}

.page-about .ab-index__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.08);
  color: #0F2B5B;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  transition: background 0.3s cubic-bezier(0.22, 1, 0.36, 1), color 0.3s cubic-bezier(0.22, 1, 0.36, 1), transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.page-about .ab-index__link span {
  font-size: 12px;
  opacity: 0.55;
  font-family: "Space Grotesk", "Inter", "Noto Sans SC", sans-serif;
}

.page-about .ab-index__link:hover {
  background: linear-gradient(135deg, #2563EB 0%, #7C3AED 100%);
  color: #fff;
  transform: translateY(-2px);
}

.page-about .ab-index__stat {
  display: none;
}

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

.page-about .ab-section {
  padding: 48px 0 32px;
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-section__head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

.page-about .ab-section__num {
  font-family: "Space Grotesk", "Inter", "Noto Sans SC", sans-serif;
  font-size: 72px;
  font-weight: 700;
  line-height: 0.9;
  background: linear-gradient(135deg, #2563EB, #7C3AED);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-about .ab-section__head h2 {
  margin: 6px 0 0;
  font-size: 28px;
  line-height: 1.2;
  color: #0F2B5B;
}

.page-about .ab-lead {
  margin-bottom: 16px;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.6;
  color: #0F2B5B;
}

.page-about .ab-tier__main > p,
.page-about .ab-team__text > p {
  margin-bottom: 16px;
  font-size: 16px;
  line-height: 1.8;
  color: #4a5568;
}

.page-about .ab-figure {
  margin: 32px 0 0;
  padding: 8px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(15, 43, 91, 0.1);
  border-radius: 20px;
}

.page-about .ab-figure__img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: calc(20px - 8px);
  object-fit: cover;
}

.page-about .ab-figure figcaption {
  padding: 12px 8px 4px;
  font-size: 14px;
  line-height: 1.6;
  color: #718096;
  text-align: center;
}

.page-about .ab-figure--wide {
  margin-top: 48px;
}

.page-about .ab-principles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding: 0;
  margin: 40px 0 0;
  list-style: none;
}

.page-about .ab-principles li {
  padding: 24px;
  background: var(--ab-card-bg);
  border: 1px solid rgba(15, 43, 91, 0.1);
  border-radius: 20px;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.page-about .ab-principles li:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(15, 43, 91, 0.12);
}

.page-about .ab-principles__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, #2563EB 0%, #7C3AED 100%);
  color: #fff;
  font-size: 18px;
}

.page-about .ab-principles h3,
.page-about .ab-timeline__card h3,
.page-about .ab-credential h3,
.page-about .ab-duty-grid h3 {
  margin: 0 0 8px;
  font-size: 18px;
  color: #0F2B5B;
}

.page-about .ab-principles p,
.page-about .ab-timeline__card p,
.page-about .ab-credential p,
.page-about .ab-duty-grid p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: #4a5568;
}

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

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 14px;
  width: 2px;
  background: linear-gradient(180deg, #2563EB, #7C3AED);
}

.page-about .ab-timeline__item {
  position: relative;
  padding: 0 0 32px 48px;
}

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 3px solid #2563EB;
  background: #fff;
}

.page-about .ab-timeline__year {
  display: inline-block;
  margin-bottom: 8px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.12);
  color: #2563EB;
  font-family: "Space Grotesk", "Inter", "Noto Sans SC", sans-serif;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.page-about .ab-timeline__card {
  padding: 20px;
  background: var(--ab-card-bg);
  border: 1px solid rgba(15, 43, 91, 0.1);
  border-radius: 20px;
}

.page-about .ab-intro {
  margin-bottom: 32px;
  font-size: 18px;
  line-height: 1.7;
  color: #4a5568;
}

.page-about .ab-credential-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .ab-credential {
  padding: 24px;
  background: var(--ab-card-bg);
  border: 1px solid rgba(15, 43, 91, 0.1);
  border-radius: 20px;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.page-about .ab-credential:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(15, 43, 91, 0.12);
}

.page-about .ab-credential__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  margin-bottom: 16px;
  border-radius: 18px;
  background: linear-gradient(135deg, #2563EB 0%, #7C3AED 100%);
  color: #fff;
  font-family: "Space Grotesk", "Inter", "Noto Sans SC", sans-serif;
  font-size: 18px;
  font-weight: 700;
}

.page-about .ab-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
  padding: 24px 16px;
  border-radius: 20px;
  background: linear-gradient(135deg, #2563EB 0%, #7C3AED 100%);
  color: #fff;
  text-align: center;
}

.page-about .ab-metric__num {
  display: block;
  font-family: "Space Grotesk", "Inter", "Noto Sans SC", sans-serif;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.2;
}

.page-about .ab-metric__num span {
  font-size: 0.7em;
  font-weight: 600;
}

.page-about .ab-metric__label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.5;
  opacity: 0.85;
}

.page-about .ab-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .ab-team__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 20px 0 0;
  list-style: none;
}

.page-about .ab-team__tags li {
  padding: 7px 16px;
  border-radius: 999px;
  background: rgba(124, 58, 237, 0.12);
  color: #7C3AED;
  font-size: 14px;
  font-weight: 600;
}

.page-about .ab-duty-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .ab-duty-grid article {
  padding: 24px;
  background: var(--ab-card-bg);
  border: 1px solid rgba(15, 43, 91, 0.1);
  border-radius: 20px;
}

.page-about .ab-duty-note {
  margin-top: 32px;
  padding: 20px 24px;
  border-left: 4px solid #F97316;
  border-radius: 8px;
  background: rgba(249, 115, 22, 0.1);
  font-size: 15px;
  line-height: 1.7;
  color: #4a5568;
}

.page-about .ab-duty-note a {
  color: #2563EB;
  font-weight: 600;
}

.page-about .ab-footer-cta {
  margin: 48px 0 64px;
  padding: 40px 24px;
  border-radius: 24px;
  background: linear-gradient(135deg, #0F2B5B 0%, #2563EB 55%, #7C3AED 100%);
  color: #fff;
  text-align: center;
}

.page-about .ab-footer-cta h2 {
  margin: 8px 0 24px;
  font-size: 28px;
  line-height: 1.25;
  color: #fff;
}

.page-about .ab-footer-cta__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.page-about .ab-footer-cta .btn-primary {
  background: #fff;
  color: #0F2B5B;
  border-color: transparent;
}

.page-about .ab-footer-cta .btn-ghost {
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
  background: transparent;
}

.page-about .ab-footer-cta__note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.6;
  opacity: 0.8;
}

@media (min-width: 900px) {
  .page-about .ab-hero {
    padding: 72px 0 64px;
  }

  .page-about .ab-hero h1 {
    font-size: 44px;
  }

  .page-about .ab-layout {
    grid-template-columns: 220px 1fr;
    gap: 56px;
    margin-top: 32px;
  }

  .page-about .ab-index {
    position: sticky;
    top: 120px;
    align-self: start;
    padding: 28px 20px;
  }

  .page-about .ab-index__nav {
    flex-direction: column;
    align-items: stretch;
  }

  .page-about .ab-index__link {
    justify-content: space-between;
    border-radius: 12px;
  }

  .page-about .ab-index__stat {
    display: block;
    padding-top: 16px;
    border-top: 1px solid rgba(15, 43, 91, 0.1);
  }

  .page-about .ab-index__stat-label {
    margin: 0;
    font-size: 14px;
    color: #4a5568;
  }

  .page-about .ab-index__stat-num {
    margin: 6px 0 0;
    font-family: "Space Grotesk", "Inter", "Noto Sans SC", sans-serif;
    font-size: 40px;
    font-weight: 700;
    line-height: 1.1;
    background: linear-gradient(135deg, #2563EB, #7C3AED);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .page-about .ab-section {
    padding: 64px 0 48px;
  }

  .page-about .ab-section__num {
    font-size: 96px;
  }

  .page-about .ab-tier {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    align-items: start;
  }

  .page-about .ab-figure {
    margin-top: 0;
  }

  .page-about .ab-figure--wide {
    margin-top: 48px;
  }

  .page-about .ab-principles {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .ab-credential-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .page-about .ab-metrics {
    grid-template-columns: repeat(3, 1fr);
    padding: 32px 24px;
  }

  .page-about .ab-metric__num {
    font-size: 36px;
  }

  .page-about .ab-metric__label {
    font-size: 14px;
  }

  .page-about .ab-team {
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .ab-duty-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .ab-footer-cta {
    margin: 64px 0 80px;
    padding: 56px 48px;
  }
}