.page-about {
  --ab-line: #2A2A2A;
  --ab-brand: #0A1E3C;
  --ab-brand-hi: #2E6EF3;
  --ab-accent: #7B2FF7;
  --ab-mint: #39FF88;
  --ab-shadow: 8px 8px 0 rgba(10, 30, 60, 0.55);
  --ab-shadow-hover: 8px 8px 0 rgba(46, 110, 243, 0.35);
  background: var(--sf-bg);
  color: var(--sf-text);
}
.page-about img {
  max-width: 100%;
  height: auto;
}
.page-about .breadcrumb {
  margin-top: 28px;
}
.page-about .ab-hero {
  position: relative;
  padding: 48px 0 64px;
  overflow: hidden;
}
.page-about .ab-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 60%;
  height: 100%;
  background-image:
    linear-gradient(rgba(46, 110, 243, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 110, 243, 0.07) 1px, transparent 1px);
  background-size: 28px 28px;
  -webkit-mask-image: radial-gradient(circle at 70% 40%, #000 0%, transparent 72%);
  mask-image: radial-gradient(circle at 70% 40%, #000 0%, transparent 72%);
  pointer-events: none;
}
.page-about .ab-hero-inner {
  position: relative;
  z-index: 1;
}
.page-about .ab-hero-trail {
  position: absolute;
  top: 16px;
  left: 0;
  width: 100%;
  height: 180px;
  z-index: 0;
  opacity: 0.55;
  pointer-events: none;
  display: none;
}
.page-about .ab-hero .kicker {
  margin-bottom: 18px;
}
.page-about .ab-hero h1 {
  margin: 0 0 24px;
  max-width: 16em;
  font-size: clamp(2.1rem, 6vw, 4.4rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: 0.01em;
}
.page-about .ab-hero-lead {
  max-width: 46em;
  margin: 0 0 36px;
  font-size: clamp(0.9375rem, 1.3vw, 1.0625rem);
  line-height: 1.75;
  color: var(--sf-text-dim);
}
.page-about .ab-hero-data {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 2px solid var(--sf-line);
  border-bottom: 2px solid var(--sf-line);
}
.page-about .ab-hero-data-item {
  flex: 1 1 160px;
  padding: 20px 24px 20px 0;
}
.page-about .ab-hero-data-item + .ab-hero-data-item {
  border-left: 1px solid var(--sf-line);
  padding-left: 24px;
}
.page-about .ab-hero-num {
  display: block;
  font-family: var(--sf-font-data);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--sf-brand-hi);
}
.page-about .ab-hero-num sup {
  font-size: 0.5em;
  color: var(--sf-text);
}
.page-about .ab-hero-label {
  display: block;
  margin-top: 8px;
  font-size: 0.875rem;
  color: var(--sf-text-muted);
}
.page-about .ab-section-head {
  max-width: 720px;
  margin-bottom: 40px;
}
.page-about .ab-section-head .section-desc {
  margin-top: 16px;
}
.page-about .ab-origin {
  background: var(--sf-bg-panel);
  border-top: 2px solid var(--sf-line);
  border-bottom: 2px solid var(--sf-line);
}
.page-about .ab-origin-grid {
  display: grid;
  gap: 36px;
}
.page-about .ab-origin-text p {
  margin: 0 0 16px;
  line-height: 1.75;
  color: var(--sf-text-dim);
}
.page-about .ab-origin-text .btn {
  margin-top: 12px;
}
.page-about .ab-origin-img {
  margin: 0;
  border: 2px solid var(--sf-line);
  box-shadow: var(--ab-shadow);
  background: var(--sf-bg);
  transition: border-color var(--sf-ease), box-shadow var(--sf-ease);
}
.page-about .ab-origin-img img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .ab-origin-img figcaption {
  padding: 12px 16px;
  font-family: var(--sf-font-data);
  font-size: 0.8125rem;
  color: var(--sf-text-muted);
  background: var(--sf-bg-panel-2);
  border-top: 1px solid var(--sf-line);
}
.page-about .ab-origin-img:hover {
  border-color: var(--ab-brand-hi);
  box-shadow: var(--ab-shadow-hover);
}
.page-about .ab-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .ab-tl-item {
  position: relative;
  padding-left: 52px;
  margin-bottom: 40px;
}
.page-about .ab-tl-item:last-child {
  margin-bottom: 0;
}
.page-about .ab-tl-item::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 14px;
  bottom: -40px;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom,
    var(--ab-line) 0,
    var(--ab-line) 4px,
    transparent 4px,
    transparent 10px
  );
}
.page-about .ab-tl-item:last-child::before {
  display: none;
}
.page-about .ab-tl-node {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 1;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--ab-brand);
  border: 2px solid var(--ab-brand-hi);
  box-shadow: 0 0 0 4px rgba(46, 110, 243, 0.16);
  cursor: pointer;
  transition: box-shadow var(--sf-ease), transform var(--sf-ease);
}
.page-about .ab-tl-node:hover,
.page-about .ab-tl-node:focus-visible {
  box-shadow: 0 0 0 8px rgba(46, 110, 243, 0.26);
  transform: scale(1.06);
}
.page-about .ab-tl-node:focus-visible {
  outline: 2px solid var(--sf-text);
  outline-offset: 4px;
}
.page-about .ab-tl-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--sf-text);
}
.page-about .ab-tl-card {
  padding: 24px;
  background: var(--sf-bg-panel);
  border: 1px solid var(--sf-line);
  box-shadow: var(--ab-shadow);
  transition: border-color var(--sf-ease), box-shadow var(--sf-ease), transform var(--sf-ease);
}
.page-about .ab-tl-card:hover {
  border-color: var(--ab-brand-hi);
  box-shadow: var(--ab-shadow-hover);
  transform: translate(-2px, -2px);
}
.page-about .ab-tl-year {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 10px;
  background: var(--ab-brand);
  border: 1px solid var(--ab-brand-hi);
  font-family: var(--sf-font-data);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--sf-brand-hi);
}
.page-about .ab-tl-card h3 {
  margin: 0 0 8px;
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.45;
}
.page-about .ab-tl-card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--sf-text-dim);
}
.page-about .ab-tech {
  background: linear-gradient(180deg, var(--sf-bg) 0%, var(--sf-bg-brand-dark) 160%);
}
.page-about .ab-tech-grid {
  display: grid;
  gap: 36px;
}
.page-about .ab-tech-text .section-desc {
  margin-top: 16px;
}
.page-about .ab-tech-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}
.page-about .ab-tech-list li {
  display: flex;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--sf-line);
}
.page-about .ab-tech-list li:first-child {
  border-top: 1px solid var(--sf-line);
}
.page-about .ab-tech-index {
  flex-shrink: 0;
  font-family: var(--sf-font-data);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--ab-brand-hi);
  padding-top: 3px;
}
.page-about .ab-tech-list h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
}
.page-about .ab-tech-list p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--sf-text-dim);
}
.page-about .ab-tech-img {
  margin: 0;
  border: 2px solid var(--sf-line);
  box-shadow: var(--ab-shadow);
  background: var(--sf-bg);
  aspect-ratio: 8 / 5;
  overflow: hidden;
}
.page-about .ab-tech-img img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .ab-honors {
  background: var(--sf-bg-panel);
  border-top: 2px solid var(--sf-line);
  border-bottom: 2px solid var(--sf-line);
}
.page-about .ab-honors-grid {
  display: grid;
  gap: 36px;
}
.page-about .ab-honors-img {
  margin: 0;
  border: 2px solid var(--sf-line);
  box-shadow: var(--ab-shadow);
  background: var(--sf-bg);
}
.page-about .ab-honors-img img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .ab-honors-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}
.page-about .ab-honor-card {
  display: flex;
  gap: 20px;
  padding: 24px;
  background: var(--sf-bg);
  border: 1px solid var(--sf-line);
  box-shadow: var(--ab-shadow);
  transition: border-color var(--sf-ease), box-shadow var(--sf-ease);
}
.page-about .ab-honor-card:hover {
  border-color: var(--ab-brand-hi);
  box-shadow: var(--ab-shadow-hover);
}
.page-about .ab-honor-icon {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--ab-brand);
  border: 1px solid var(--ab-brand-hi);
  font-family: var(--sf-font-data);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--sf-text);
}
.page-about .ab-honor-card h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  font-weight: 700;
}
.page-about .ab-honor-card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--sf-text-dim);
}
.page-about .ab-team-grid {
  display: grid;
  gap: 36px;
}
.page-about .ab-team-stat {
  padding: 32px 28px;
  background: var(--ab-brand);
  border: 2px solid var(--ab-brand-hi);
  box-shadow: var(--ab-shadow);
}
.page-about .ab-team-num {
  display: block;
  font-family: var(--sf-font-data);
  font-size: clamp(3rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--sf-text);
}
.page-about .ab-team-num sup {
  font-size: 0.45em;
  color: var(--ab-mint);
}
.page-about .ab-team-stat-label {
  margin: 14px 0 0;
  font-family: var(--sf-font-head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--sf-text);
}
.page-about .ab-team-stat-note {
  margin: 18px 0 0;
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--sf-text-dim);
}
.page-about .ab-team-copy p {
  margin: 0 0 16px;
  line-height: 1.75;
  color: var(--sf-text-dim);
}
.page-about .ab-team-motto {
  margin: 28px 0 0;
  padding: 20px 24px;
  border-left: 4px solid var(--ab-brand-hi);
  background: var(--sf-bg-panel);
  font-family: var(--sf-font-head);
  font-size: 1.375rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--sf-text);
}
.page-about .ab-cta-inner {
  padding: 56px 0;
  border-top: 2px solid var(--sf-line);
  border-bottom: 2px solid var(--sf-line);
}
.page-about .ab-cta-inner .section-desc {
  margin-top: 16px;
}
.page-about .ab-cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 32px;
}
@media (min-width: 768px) {
  .page-about .ab-hero-trail {
    display: block;
  }
}
@media (min-width: 900px) {
  .page-about .ab-hero {
    padding: 72px 0 80px;
  }
  .page-about .ab-hero-data-item {
    padding-top: 24px;
    padding-bottom: 24px;
  }
  .page-about .ab-origin-grid {
    grid-template-columns: 1fr 400px;
    align-items: center;
    gap: 64px;
  }
  .page-about .ab-timeline {
    padding-top: 8px;
  }
  .page-about .ab-tl-item {
    display: grid;
    grid-template-columns: 1fr 48px 1fr;
    padding-left: 0;
    margin-bottom: 56px;
  }
  .page-about .ab-tl-item::before {
    left: 50%;
    transform: translateX(-1px);
    top: 14px;
    bottom: -56px;
  }
  .page-about .ab-tl-node {
    grid-column: 2;
    grid-row: 1;
    position: relative;
    left: auto;
    top: 0;
    justify-self: center;
  }
  .page-about .ab-tl-card {
    grid-column: 1;
    grid-row: 1;
    text-align: right;
    margin-right: 20px;
  }
  .page-about .ab-tl-item:nth-child(even) .ab-tl-card {
    grid-column: 3;
    text-align: left;
    margin-left: 20px;
    margin-right: 0;
  }
  .page-about .ab-tech-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 64px;
  }
  .page-about .ab-honors-grid {
    grid-template-columns: 300px 1fr;
    align-items: start;
    gap: 64px;
  }
  .page-about .ab-honors-img {
    position: sticky;
    top: 90px;
  }
  .page-about .ab-team-grid {
    grid-template-columns: 0.7fr 1.3fr;
    align-items: start;
    gap: 64px;
  }
}