.page-about {
  --about-line: rgba(245, 240, 232, 0.16);
  --about-pad: 2rem 1.25rem;
  --about-radius: 28px;
  position: relative;
  isolation: isolate;
  background:
    radial-gradient(900px 380px at 88% -2%, rgba(15, 76, 92, 0.55), transparent 60%),
    radial-gradient(720px 320px at 0% 32%, rgba(30, 144, 255, 0.14), transparent 55%),
    linear-gradient(155deg, var(--color-deep) 0%, var(--color-primary) 44%, var(--color-teal) 100%);
  color: var(--color-cream);
  font-family: var(--font-body);
  line-height: 1.7;
  overflow: hidden;
}
.page-about .content-container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.5rem;
  width: 100%;
  box-sizing: border-box;
}
.page-about .section-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-orange);
  background: rgba(255, 90, 31, 0.1);
  border: 1px solid rgba(255, 90, 31, 0.36);
  padding: 0.25rem 0.8rem;
  border-radius: 999px;
  margin-bottom: 0.75rem;
}
.page-about .section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 0.6rem;
  color: var(--color-white);
}
.page-about .section-lead {
  color: var(--color-pale);
  font-size: 0.98rem;
  max-width: 62ch;
  margin: 0 0 1.5rem;
}
.page-about .tag {
  display: inline-block;
  background: rgba(10, 30, 63, 0.08);
  color: var(--color-ink);
  border-radius: 999px;
  padding: 0.3rem 0.75rem;
  font-size: 0.76rem;
  font-family: var(--font-mono);
}
.page-about .tag-orange {
  background: var(--color-orange);
  color: var(--color-white);
}
.page-about .about-hero {
  padding: 1.5rem 1.25rem 2.25rem;
  position: relative;
}
.page-about .about-hero-inner {
  max-width: 1080px;
  margin: 0 auto;
  background: linear-gradient(135deg, rgba(245, 240, 232, 0.98), rgba(255, 255, 255, 0.95));
  color: var(--color-ink);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.25rem 2rem;
  box-shadow: var(--shadow-panel);
  position: relative;
  overflow: hidden;
}
.page-about .about-hero-inner::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 6px;
  background: linear-gradient(180deg, var(--color-orange) 0%, var(--color-gold) 100%);
}
.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  font-size: 0.82rem;
}
.page-about .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 0.5rem;
  color: rgba(43, 26, 18, 0.5);
}
.page-about .breadcrumb a {
  color: var(--color-electric);
  text-decoration: none;
}
.page-about .breadcrumb a:hover {
  text-decoration: underline;
}
.page-about .about-archive-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  border-bottom: 1px dashed rgba(43, 26, 18, 0.28);
  padding-bottom: 1rem;
  margin-bottom: 1.25rem;
}
.page-about .archive-code,
.page-about .archive-version {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  color: var(--color-orange);
}
.page-about .archive-version {
  color: var(--color-ink);
  background: var(--color-gold);
  border-radius: 999px;
  padding: 0.15rem 0.65rem;
  white-space: nowrap;
}
.page-about .about-hero-title {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 4.2vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
  max-width: 22ch;
}
.page-about .about-hero-lead {
  font-size: 1rem;
  max-width: 76ch;
  color: rgba(43, 26, 18, 0.82);
  margin: 0;
}
.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.4rem;
}
.page-about .about-position {
  padding: 2rem 0 2.5rem;
}
.page-about .about-position-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: center;
}
.page-about .about-position-copy p {
  color: var(--color-pale);
  margin: 0 0 1rem;
  font-size: 1rem;
}
.page-about .position-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}
.page-about .fact-tile {
  background: rgba(245, 240, 232, 0.08);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  padding: 0.8rem 1rem;
  min-width: 96px;
  box-sizing: border-box;
}
.page-about .fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--color-gold);
  line-height: 1.1;
  margin-bottom: 0.2rem;
}
.page-about .fact-label {
  font-size: 0.8rem;
  color: var(--color-pale);
  font-family: var(--font-heading);
}
.page-about .position-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--about-line);
}
.page-about .position-figure img,
.page-about .cert-figure img,
.page-about .milestone-image-bg img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .position-figure figcaption {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 0.6rem 1rem;
  color: var(--color-pale);
  border-top: 1px solid var(--about-line);
}
.page-about .about-research {
  padding: 1.5rem 0 2.5rem;
}
.page-about .about-research-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: start;
}
.page-about .timeline-list {
  position: relative;
  margin-top: 1.5rem;
}
.page-about .timeline-list::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 1.9rem;
  width: 2px;
  background: linear-gradient(180deg, var(--color-orange) 0%, var(--color-gold) 40%, rgba(245, 240, 232, 0.25) 92%);
}
.page-about .timeline-item {
  position: relative;
  padding-left: 3.4rem;
  margin-bottom: 1rem;
  border-radius: var(--radius-md);
  background: rgba(245, 240, 232, 0.07);
  border: 1px solid rgba(245, 240, 232, 0.14);
  transition: background 0.2s ease, border-color 0.2s ease;
}
.page-about .timeline-item[open] {
  background: rgba(245, 240, 232, 0.1);
  border-color: rgba(247, 181, 0, 0.38);
}
.page-about .timeline-summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem 1rem 1rem 0;
}
.page-about .timeline-summary::-webkit-details-marker {
  display: none;
}
.page-about .timeline-year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.78rem;
  color: var(--color-deep);
  background: var(--color-gold);
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
  white-space: nowrap;
}
.page-about .timeline-title {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-white);
  font-size: 0.95rem;
  flex: 1;
}
.page-about .timeline-mark {
  display: grid;
  place-items: center;
  width: 1.6rem;
  height: 1.6rem;
  border-radius: 50%;
  border: 1px solid rgba(245, 240, 232, 0.36);
  color: var(--color-orange);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}
.page-about .timeline-item[open] .timeline-mark {
  transform: rotate(45deg);
}
.page-about .timeline-detail {
  padding: 0 1rem 1rem 0;
  color: var(--color-pale);
  font-size: 0.88rem;
}
@media (min-width: 600px) {
  .page-about .timeline-detail {
    padding-left: 4.6rem;
  }
}
.page-about .timeline-detail p {
  margin: 0;
}
.page-about .about-research-aside {
  display: grid;
  gap: 1rem;
  align-content: start;
}
.page-about .aside-card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}
.page-about .aside-card {
  background: rgba(245, 240, 232, 0.06);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
  padding: 1rem 1.1rem;
  color: var(--color-cream);
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.page-about .aside-card:hover {
  background: rgba(245, 240, 232, 0.12);
  border-color: rgba(247, 181, 0, 0.4);
  transform: translateY(-2px);
}
.page-about .aside-card-code {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--color-orange);
  margin-bottom: 0.3rem;
}
.page-about .aside-card-title {
  display: block;
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--color-white);
  margin-bottom: 0.2rem;
}
.page-about .aside-card-text {
  display: block;
  font-size: 0.8rem;
  color: var(--color-pale);
}
.page-about .milestone-image-bg {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--about-line);
}
.page-about .milestone-note {
  background: var(--color-cream);
  color: var(--color-ink);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  position: relative;
}
.page-about .note-index {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--color-orange);
  letter-spacing: 0.06em;
}
.page-about .milestone-note h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  margin: 0.4rem 0 0.5rem;
}
.page-about .milestone-note p {
  font-size: 0.92rem;
  color: rgba(43, 26, 18, 0.78);
}
.page-about .milestone-note .btn-outline {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-ink);
  border-radius: 999px;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  color: var(--color-ink);
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}
.page-about .milestone-note .btn-outline:hover {
  background: var(--color-orange);
  border-color: var(--color-orange);
  color: var(--color-white);
}
.page-about .about-capability {
  padding: 2.5rem 0 3rem;
  position: relative;
}
.page-about .cap-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 2rem 0 1.5rem;
}
.page-about .cap-stat-card {
  position: relative;
  background: rgba(245, 240, 232, 0.07);
  border: 1px solid rgba(245, 240, 232, 0.12);
  border-radius: var(--radius-md);
  padding: 1rem 0.9rem;
  overflow: hidden;
}
.page-about .cap-stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--color-gold), var(--color-orange));
}
.page-about .cap-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.9rem;
  line-height: 1.1;
  color: var(--color-white);
  margin-bottom: 0.25rem;
}
.page-about .cap-stat-label {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  color: var(--color-pale);
}
.page-about .cap-desc-grid {
  display: grid;
  gap: 1rem;
}
.page-about .cap-desc-grid p {
  margin: 0;
  color: var(--color-pale);
  background: rgba(245, 240, 232, 0.05);
  border-left: 2px solid rgba(247, 181, 0, 0.6);
  padding: 1rem 1.2rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.95rem;
}
.page-about .about-cert {
  padding: 2.5rem 0 3rem;
}
.page-about .about-cert-head {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.page-about .cert-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  align-items: start;
}
.page-about .cert-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.page-about .cert-item {
  background: var(--color-cream);
  color: var(--color-ink);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.1rem;
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.page-about .cert-item:hover,
.page-about .cert-item:focus-visible {
  transform: rotate(0.6deg) translateY(-3px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.24);
  outline: none;
}
.page-about .cert-code {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  background: var(--color-primary);
  color: var(--color-cream);
  border-radius: 999px;
  padding: 0.2rem 0.5rem;
  margin-bottom: 0.6rem;
}
.page-about .cert-item h3 {
  font-size: 0.95rem;
  margin: 0 0 0.35rem;
  font-family: var(--font-heading);
}
.page-about .cert-item p {
  font-size: 0.85rem;
  margin: 0;
  color: rgba(43, 26, 18, 0.75);
}
.page-about .cert-figure {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--about-line);
}
.page-about .ecosystem-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}
.page-about .ecosystem-item {
  background: rgba(245, 240, 232, 0.06);
  border: 1px solid rgba(245, 240, 232, 0.12);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.25rem;
  position: relative;
  overflow: hidden;
}
.page-about .ecosystem-num {
  position: absolute;
  right: 0.6rem;
  top: 0.2rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 2.4rem;
  color: rgba(247, 181, 0, 0.22);
  line-height: 1;
  pointer-events: none;
}
.page-about .ecosystem-item h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--color-white);
  margin: 0 0 0.3rem;
}
.page-about .ecosystem-item p {
  font-size: 0.85rem;
  color: var(--color-pale);
  margin: 0;
  max-width: 38ch;
}
.page-about .about-index {
  padding: 2rem 0 3.5rem;
}
.page-about .term-list {
  margin-top: 1.5rem;
  background: var(--color-cream);
  border-radius: var(--radius-lg);
  color: var(--color-ink);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.page-about .term-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 0.25rem 1rem;
  align-items: center;
  padding: 1rem 1.25rem;
  text-decoration: none;
  color: var(--color-ink);
  transition: background 0.2s ease;
  border-top: 1px solid rgba(43, 26, 18, 0.12);
}
.page-about .term-row:first-child {
  border-top: none;
}
.page-about .term-row:hover {
  background: rgba(255, 90, 31, 0.08);
}
.page-about .term-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-orange);
}
.page-about .term-name {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.92rem;
}
.page-about .term-desc {
  font-size: 0.82rem;
  color: rgba(43, 26, 18, 0.68);
  grid-column: 2 / 3;
}
.page-about .term-chip {
  grid-column: 3 / 4;
  grid-row: 1;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  background: rgba(10, 30, 63, 0.08);
  border-radius: 999px;
  padding: 0.25rem 0.55rem;
  white-space: nowrap;
}
@media (min-width: 720px) {
  .page-about .aside-card-grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .cap-desc-grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .cert-list {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .ecosystem-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .term-row {
    grid-template-columns: auto 1fr 2fr auto;
    gap: 0.35rem 1rem;
  }
  .page-about .term-desc {
    grid-column: 3;
    grid-row: 1;
  }
  .page-about .term-chip {
    grid-column: 4;
  }
}
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 2.5rem 2rem 3.5rem;
  }
  .page-about .about-hero-inner {
    padding: 2.25rem 2.5rem 2.75rem;
  }
  .page-about .about-position-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 2.5rem;
  }
  .page-about .about-research-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 2rem;
  }
  .page-about .about-research-aside {
    position: sticky;
    top: 1.5rem;
  }
  .page-about .about-cert-head {
    grid-template-columns: 1fr 1fr;
    align-items: end;
  }
  .page-about .cert-layout {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 1.5rem;
  }
}
@media (min-width: 600px) {
  .page-about .about-hero-inner {
    padding: 2rem 1.75rem 2.5rem;
  }
  .page-about .timeline-list::before {
    left: 2.2rem;
  }
  .page-about .timeline-item {
    padding-left: 4rem;
  }
  .page-about .cap-stats-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .position-facts {
    gap: 1rem;
  }
}
@media (min-width: 720px) {
  .page-about .cap-stats-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}