.page-about {
  --ab-orange: var(--c-orange);
  --ab-green: var(--c-green);
  --ab-deep: var(--c-blue-deep);
  --ab-outer: var(--c-blue-outer);
  --ab-card: var(--c-card);
  --ab-text: var(--c-text);
  --ab-muted: var(--c-muted);
  --ab-line: var(--c-line);
  --ab-font-display: var(--font-display);
  --ab-font-data: var(--font-data);
  position: relative;
  isolation: isolate;
  background:
    radial-gradient(1200px 620px at 92% 0%, rgba(255, 122, 0, 0.09), transparent 60%),
    radial-gradient(900px 520px at 0% 84%, rgba(198, 255, 0, 0.04), transparent 50%),
    var(--ab-outer);
  color: var(--ab-text);
}

.page-about .breadcrumb {
  padding-top: 24px;
}

.page-about .page-ab-head {
  padding: 20px 0 36px;
}

.page-about .page-ab-head__kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.page-about .page-ab-head__code {
  font-family: var(--ab-font-data);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--ab-muted);
}

.page-about .page-ab-head__title {
  font-family: var(--ab-font-display);
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.02em;
  max-width: 860px;
  margin: 0 0 14px;
}

.page-about .page-ab-head__desc {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ab-muted);
  max-width: 760px;
  margin: 0;
}

.page-about .ab-position {
  position: relative;
  padding: 30px 0 48px;
}

.page-about .ab-position::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 72%;
  max-width: 520px;
  height: 3px;
  background: linear-gradient(90deg, var(--ab-orange) 0%, var(--ab-green) 100%);
  transform: skewX(var(--skew));
}

.page-about .ab-position__grid {
  display: block;
}

.page-about .ab-position__main {
  position: relative;
}

.page-about .ab-position__overline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ab-muted);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.page-about .ab-position__overline span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 30px;
  height: 22px;
  padding: 0 8px;
  background: var(--ab-orange);
  color: var(--ab-outer);
  font-family: var(--ab-font-data);
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 700;
}

.page-about .ab-position__title {
  font-family: var(--ab-font-display);
  font-size: clamp(1.9rem, 4vw, 2.8rem);
  font-weight: 900;
  line-height: 1.18;
  margin: 0 0 20px;
}

.page-about .ab-position__lead {
  font-size: 1.06rem;
  line-height: 1.9;
  color: var(--ab-text);
  margin: 0 0 16px;
}

.page-about .ab-position__text {
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--ab-muted);
  margin: 0 0 16px;
}

.page-about .ab-position__note {
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--ab-muted);
  padding: 14px 16px;
  border-left: 3px solid var(--ab-orange);
  background: rgba(18, 42, 74, 0.5);
  border-radius: 0 10px 10px 0;
  margin: 0;
}

.page-about .ab-position__aside {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .ab-side-card {
  background: rgba(18, 42, 74, 0.55);
  border: 1px solid var(--ab-line);
  border-radius: 16px;
  padding: 20px;
}

.page-about .ab-side-card--orange {
  border-top: 3px solid var(--ab-orange);
}

.page-about .ab-side-card--trust {
  background: linear-gradient(180deg, rgba(18, 42, 74, 0.8), rgba(13, 27, 42, 0.7));
}

.page-about .ab-side-card__title {
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ab-green);
  margin: 0 0 14px;
}

.page-about .ab-side-card__text {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--ab-muted);
  margin: 0 0 10px;
}

.page-about .ab-side-card__text:last-child {
  margin-bottom: 0;
}

.page-about .ab-side-nav {
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-about .ab-side-nav li + li {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.page-about .ab-side-nav a {
  display: block;
  padding: 10px 0;
  color: var(--ab-text);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.3s var(--ease), padding-left 0.3s var(--ease);
}

.page-about .ab-side-nav a:hover {
  color: var(--ab-orange);
  padding-left: 8px;
}

.page-about .ab-side-link {
  display: block;
  padding: 8px 0;
  color: var(--ab-orange);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: color 0.3s var(--ease), padding-left 0.3s var(--ease);
}

.page-about .ab-side-link:last-child {
  border-bottom: none;
}

.page-about .ab-side-link:hover {
  color: var(--ab-green);
  padding-left: 8px;
}

.page-about .ab-milestones {
  position: relative;
  padding: 40px 0 56px;
  background:
    linear-gradient(180deg, rgba(10, 42, 94, 0.55), rgba(13, 27, 42, 0.85)),
    repeating-linear-gradient(90deg, rgba(255, 122, 0, 0.04) 0, rgba(255, 122, 0, 0.04) 1px, transparent 1px, transparent 80px);
  border-top: 1px solid var(--ab-line);
  border-bottom: 1px solid var(--ab-line);
}

.page-about .ab-milestones::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--ab-orange) 0%, var(--ab-deep) 55%, var(--ab-green) 100%);
  opacity: 0.7;
}

.page-about .ab-section-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 28px;
}

.page-about .ab-section-head__index {
  font-family: var(--ab-font-data);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--ab-green);
  border: 1px solid var(--ab-line);
  border-radius: 6px;
  padding: 4px 8px;
  line-height: 1.2;
  white-space: nowrap;
}

.page-about .ab-section-head__title {
  font-family: var(--ab-font-display);
  font-size: 1.55rem;
  font-weight: 900;
  line-height: 1.25;
  margin: 0 0 4px;
}

.page-about .ab-section-head__desc {
  font-size: 0.92rem;
  color: var(--ab-muted);
  line-height: 1.6;
  margin: 0;
}

.page-about .ab-timeline-visual {
  position: relative;
  margin: 0 0 28px;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--ab-line);
  transform: skewY(0.4deg);
}

.page-about .ab-timeline-visual > img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  transform: skewY(-0.4deg) scale(1.02);
}

.page-about .ab-timeline-visual__caption {
  position: absolute;
  left: 16px;
  bottom: 12px;
  font-size: 0.82rem;
  font-family: var(--ab-font-data);
  color: var(--ab-text);
  background: rgba(13, 27, 42, 0.72);
  border-left: 3px solid var(--ab-orange);
  padding: 6px 12px;
  border-radius: 0 8px 8px 0;
  backdrop-filter: blur(4px);
}

.page-about .ab-timeline {
  position: relative;
  padding: 8px 0 4px;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--ab-orange) 0%, rgba(255, 122, 0, 0.12) 38%, rgba(198, 255, 0, 0.3) 66%, rgba(198, 255, 0, 0.06) 100%);
}

.page-about .ab-timeline-item {
  position: relative;
  padding-left: 32px;
  margin-bottom: 26px;
}

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

.page-about .ab-timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 10px;
  height: 10px;
  background: var(--ab-orange);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px rgba(255, 122, 0, 0.15), 0 0 14px rgba(255, 122, 0, 0.4);
}

.page-about .ab-timeline-item:nth-child(even)::before {
  background: var(--ab-green);
  box-shadow: 0 0 0 4px rgba(198, 255, 0, 0.12), 0 0 14px rgba(198, 255, 0, 0.3);
}

.page-about .ab-timeline-marker {
  display: inline-flex;
  margin-bottom: 8px;
}

.page-about .ab-timeline-year {
  font-family: var(--ab-font-data);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ab-orange);
  background: rgba(255, 122, 0, 0.1);
  border: 1px solid rgba(255, 122, 0, 0.25);
  padding: 3px 10px;
  border-radius: 5px;
}

.page-about .ab-timeline-item:nth-child(even) .ab-timeline-year {
  color: var(--ab-green);
  background: rgba(198, 255, 0, 0.08);
  border-color: rgba(198, 255, 0, 0.2);
}

.page-about .ab-timeline-card {
  background: rgba(18, 42, 74, 0.6);
  border: 1px solid var(--ab-line);
  border-left: 3px solid var(--ab-line);
  border-radius: 12px;
  padding: 18px 18px 16px;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .ab-timeline-item:hover .ab-timeline-card {
  border-left-color: var(--ab-orange);
  transform: translateX(4px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.22);
}

.page-about .ab-timeline-card__title {
  font-size: 1.06rem;
  font-weight: 700;
  margin: 0 0 8px;
}

.page-about .ab-timeline-card__text {
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--ab-muted);
  margin: 0;
}

.page-about .ab-capabilities {
  padding: 48px 0 56px;
}

.page-about .ab-cap-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .ab-cap-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.page-about .ab-stat {
  position: relative;
  background: rgba(18, 42, 74, 0.65);
  border: 1px solid var(--ab-line);
  border-radius: 14px;
  padding: 18px 16px 16px;
  overflow: hidden;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .ab-stat::after {
  content: "";
  position: absolute;
  right: -14px;
  bottom: -14px;
  width: 42px;
  height: 42px;
  background: var(--ab-orange);
  opacity: 0.12;
  clip-path: polygon(100% 0, 0 100%, 100% 100%);
}

.page-about .ab-stat:nth-child(even)::after {
  background: var(--ab-green);
  opacity: 0.1;
}

.page-about .ab-stat:hover {
  transform: translateY(-4px);
  border-color: var(--ab-orange);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.24);
}

.page-about .ab-stat__num {
  display: block;
  font-family: var(--ab-font-data);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ab-orange);
  margin-bottom: 6px;
}

.page-about .ab-stat:nth-child(even) .ab-stat__num {
  color: var(--ab-green);
}

.page-about .ab-stat__label {
  display: block;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--ab-muted);
}

.page-about .ab-cap-visual {
  position: relative;
  margin: 0;
  align-self: stretch;
}

.page-about .ab-cap-visual::before {
  content: "";
  position: absolute;
  inset: 14px -10px -10px 14px;
  border: 2px solid var(--ab-orange);
  border-radius: 18px;
  opacity: 0.3;
  z-index: -1;
}

.page-about .ab-cap-visual > img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: 18px;
  border: 1px solid var(--ab-line);
  box-shadow: var(--shadow-card);
}

.page-about .ab-cap-visual__caption {
  font-size: 0.82rem;
  font-family: var(--ab-font-data);
  color: var(--ab-muted);
  margin-top: 10px;
  text-align: right;
}

.page-about .ab-capability-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 40px;
}

.page-about .ab-cap-card {
  background: rgba(18, 42, 74, 0.45);
  border: 1px solid var(--ab-line);
  border-radius: 16px;
  padding: 22px 20px;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .ab-cap-card:hover {
  border-color: var(--ab-orange);
  transform: translateY(-3px);
}

.page-about .ab-cap-card__tag {
  display: inline-block;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ab-green);
  background: rgba(198, 255, 0, 0.08);
  border: 1px solid rgba(198, 255, 0, 0.18);
  padding: 3px 10px;
  border-radius: 5px;
  margin-bottom: 12px;
}

.page-about .ab-cap-card__title {
  font-size: 1.04rem;
  font-weight: 700;
  margin: 0 0 8px;
}

.page-about .ab-cap-card__text {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--ab-muted);
  margin: 0;
}

.page-about .ab-subscribe {
  position: relative;
  padding: 52px 0 60px;
  background: linear-gradient(180deg, rgba(10, 42, 94, 0.35), rgba(13, 27, 42, 0.7));
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-subscribe::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 60%;
  height: 3px;
  background: linear-gradient(270deg, var(--ab-green), transparent);
  transform: skewX(var(--skew));
}

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

.page-about .ab-step-list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  counter-reset: subscribe-step;
}

.page-about .ab-step {
  position: relative;
  display: flex;
  gap: 16px;
  padding: 18px 16px 18px 18px;
  margin-bottom: 14px;
  background: rgba(18, 42, 74, 0.55);
  border: 1px solid var(--ab-line);
  border-left: 3px solid var(--ab-orange);
  border-radius: 0 14px 14px 0;
  transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .ab-step:hover {
  transform: translateX(4px);
  background: rgba(18, 42, 74, 0.8);
}

.page-about .ab-step__num {
  font-family: var(--ab-font-data);
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1;
  color: var(--ab-green);
  opacity: 0.85;
  min-width: 44px;
}

.page-about .ab-step__title {
  font-size: 1.02rem;
  font-weight: 700;
  margin: 0 0 6px;
}

.page-about .ab-step__text {
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--ab-muted);
  margin: 0;
}

.page-about .ab-subscribe-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 8px;
}

.page-about .ab-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--ab-orange);
  color: var(--ab-outer);
  font-size: 0.95rem;
  font-weight: 800;
  text-decoration: none;
  padding: 12px 22px;
  border-radius: 8px;
  box-shadow: 0 6px 18px rgba(255, 122, 0, 0.25);
  transition: background 0.3s var(--ease), transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-about .ab-btn:hover {
  background: var(--ab-green);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(198, 255, 0, 0.2);
}

.page-about .ab-link {
  color: var(--ab-text);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(255, 122, 0, 0.4);
  transition: color 0.3s var(--ease), text-decoration-color 0.3s var(--ease);
}

.page-about .ab-link:hover {
  color: var(--ab-orange);
  text-decoration-color: var(--ab-orange);
}

.page-about .ab-subscribe-note {
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--ab-muted);
  margin: 18px 0 0;
}

.page-about .ab-subscribe-visual {
  position: relative;
  margin: 0;
}

.page-about .ab-subscribe-visual::before {
  content: "";
  position: absolute;
  inset: 18px -14px -14px 18px;
  border: 2px solid var(--ab-green);
  border-radius: 20px;
  opacity: 0.3;
  z-index: -1;
}

.page-about .ab-subscribe-visual > img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border-radius: 18px;
  border: 1px solid var(--ab-line);
  box-shadow: var(--shadow-card);
}

.page-about .ab-subscribe-visual__caption {
  font-size: 0.82rem;
  font-family: var(--ab-font-data);
  color: var(--ab-muted);
  margin-top: 12px;
  text-align: center;
}

.page-about .page-about__back2top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 99;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(18, 42, 74, 0.9);
  border: 1px solid var(--ab-orange);
  border-radius: 10px;
  color: var(--ab-orange);
  font-size: 1.2rem;
  cursor: pointer;
  transition: background 0.3s var(--ease), color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .page-about__back2top:hover {
  background: var(--ab-orange);
  color: var(--ab-outer);
  transform: translateY(-3px);
}

@media (min-width: 640px) {
  .page-about .ab-cap-stats {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .ab-capability-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .page-about .ab-timeline-item:nth-child(even) {
    margin-left: 8%;
  }

  .page-about .ab-timeline-item:nth-child(even) .ab-timeline-card {
    border-left: 1px solid var(--ab-line);
    border-right: 3px solid var(--ab-green);
  }

  .page-about .ab-timeline-item:nth-child(even):hover .ab-timeline-card {
    border-right-color: var(--ab-green);
    transform: translateX(-4px);
  }

  .page-about .ab-subscribe-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
  }

  .page-about .ab-subscribe-visual {
    position: sticky;
    top: 28px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-position {
    padding: 40px 0 64px;
  }

  .page-about .ab-position__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 48px;
    align-items: start;
  }

  .page-about .ab-position__aside {
    margin-top: 0;
    position: sticky;
    top: 24px;
  }

  .page-about .ab-section-head__title {
    font-size: 1.8rem;
  }

  .page-about .ab-cap-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.7fr);
    align-items: center;
    gap: 36px;
  }

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

  .page-about .ab-cap-visual > img {
    max-height: 320px;
  }
}

@media (min-width: 1100px) {
  .page-about .ab-capability-cards {
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    margin-top: 52px;
  }

  .page-about .ab-timeline-item {
    padding-left: 46px;
  }

  .page-about .ab-timeline-item:nth-child(even) {
    padding-left: 6%;
  }

  .page-about .ab-timeline::before {
    left: 8px;
  }

  .page-about .ab-timeline-item::before {
    left: 3px;
  }

  .page-about .ab-timeline-card {
    padding: 22px 24px 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    transform: none !important;
  }
}