.page-about {
  --about-line: rgba(242, 233, 216, 0.14);
  --about-gold-glow: rgba(255, 215, 0, 0.4);
  --about-grid-line: rgba(255, 255, 255, 0.03);
  position: relative;
  overflow: hidden;
  background: var(--deep-space-blue);
  color: var(--mineral-cream);
  box-sizing: border-box;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: inherit;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about figure {
  margin: 0;
  border: 1px solid var(--glass-stroke);
  border-radius: 14px;
  padding: 12px;
  background: rgba(42, 59, 76, 0.28);
  backdrop-filter: blur(6px);
}

.page-about figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  margin-top: 12px;
  text-align: center;
}

.page-about .about-breadcrumb {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 20px 24px 0;
}

.page-about .about-breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  font-size: 13px;
  font-family: var(--font-body);
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.page-about .about-breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about .about-breadcrumb a:hover {
  color: var(--electric-gold);
}

.page-about .about-breadcrumb li + li::before {
  content: "›";
  margin-right: 8px;
  color: var(--mineral-terracotta);
}

.page-about .about-hero {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 40px 24px 64px;
  border-bottom: 1px solid var(--glass-stroke);
  position: relative;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, var(--about-grid-line) 0, var(--about-grid-line) 1px, transparent 1px, transparent 80px),
    repeating-linear-gradient(0deg, var(--about-grid-line) 0, var(--about-grid-line) 1px, transparent 1px, transparent 60px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -40px;
  right: 6%;
  width: 320px;
  height: 320px;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(circle, var(--about-gold-glow), transparent 68%);
  opacity: 0.55;
  border-radius: 50%;
}

.page-about .about-hero > * {
  position: relative;
  z-index: 1;
}

.page-about .about-hero-kicker {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.5em;
  color: var(--alert-red);
  margin: 0 0 24px;
  text-transform: uppercase;
}

.page-about .about-hero-en {
  font-family: var(--font-display);
  font-size: clamp(58px, 11vw, 132px);
  font-weight: 300;
  line-height: 0.92;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 0 0 32px;
  background: linear-gradient(120deg, #f2e9d8 25%, rgba(255, 215, 0, 0.7) 75%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.page-about .about-hero-title {
  font-family: var(--font-display);
  font-size: clamp(21px, 3vw, 30px);
  font-weight: 700;
  line-height: 1.35;
  margin: 0 0 18px;
  color: var(--mineral-cream);
}

.page-about .about-hero-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 640px;
  margin: 0;
}

.page-about .about-hero-meta {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 36px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--glass-stroke);
}

.page-about .about-hero-meta-item {
  border-left: 2px solid var(--mineral-terracotta);
  padding-left: 12px;
}

.page-about .about-hero-meta-num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 500;
  color: var(--electric-gold);
  display: block;
  line-height: 1.2;
}

.page-about .about-hero-meta-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.page-about .about-archive-index {
  margin-top: 40px;
  max-width: 560px;
  border-radius: 14px;
  padding: 20px 22px;
}

.page-about .about-archive-index-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--mineral-terracotta);
  text-transform: uppercase;
  margin: 0 0 14px;
}

.page-about .about-archive-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-archive-index-list a {
  display: flex;
  gap: 12px;
  align-items: baseline;
  color: var(--mineral-cream);
  text-decoration: none;
  font-size: 15px;
  padding: 8px 0;
  border-bottom: 1px solid var(--glass-stroke);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.page-about .about-archive-index-list a:hover,
.page-about .about-archive-index-list a:focus-visible {
  color: var(--electric-gold);
  padding-left: 8px;
  outline: none;
}

.page-about .about-archive-index-list a span {
  font-family: var(--font-mono);
  color: var(--neon-purple);
  font-size: 13px;
}

.page-about .section {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 64px 24px;
  border-bottom: 1px solid var(--glass-stroke);
}

.page-about .section-heading {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 36px;
}

.page-about .section-heading > div {
  min-width: 0;
}

.page-about .section-heading h2 {
  font-family: var(--font-display);
  font-size: clamp(24px, 3.8vw, 38px);
  font-weight: 500;
  line-height: 1.2;
  margin: 0 0 8px;
  color: var(--mineral-cream);
}

.page-about .section-heading .section-sub {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin: 0;
}

.page-about .index-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--electric-gold);
  border: 1px solid rgba(255, 215, 0, 0.35);
  background: rgba(255, 215, 0, 0.06);
  padding: 4px 10px;
  border-radius: 4px;
  white-space: nowrap;
  margin-top: 4px;
}

.page-about .about-guardian-grid {
  display: grid;
  gap: 40px;
}

.page-about .about-guardian-para {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
  margin: 0 0 18px;
}

.page-about .about-guardian-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-guardian-list li {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--mineral-cream);
}

.page-about .about-guardian-figure {
  align-self: center;
}

.page-about .about-guardian-figure img {
  border-radius: 8px;
  width: 100%;
  object-fit: cover;
}

.page-about .about-milestones {
  background: linear-gradient(180deg, rgba(42, 59, 76, 0.2), transparent 45%);
}

.page-about .about-milestone-layout {
  display: grid;
  gap: 40px;
}

.page-about .about-timeline {
  position: relative;
  padding-left: 30px;
  margin: 0;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: linear-gradient(180deg, var(--electric-gold), var(--neon-purple) 65%, transparent);
}

.page-about .about-timeline-item {
  position: relative;
  padding-bottom: 38px;
}

.page-about .about-timeline-item:last-child {
  padding-bottom: 4px;
}

.page-about .about-timeline-dot {
  position: absolute;
  left: -30px;
  top: 4px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--deep-space-blue);
  border: 3px solid var(--electric-gold);
  box-shadow: 0 0 10px var(--about-gold-glow);
}

.page-about .about-timeline-year {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--electric-gold);
  background: rgba(255, 215, 0, 0.08);
  border: 1px solid rgba(255, 215, 0, 0.3);
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  margin-bottom: 10px;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.page-about .about-timeline-item:hover .about-timeline-year {
  background: rgba(255, 215, 0, 0.16);
  color: var(--electric-gold);
  transform: translateX(4px);
}

.page-about .about-timeline-body h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  margin: 0 0 6px;
  color: var(--mineral-cream);
}

.page-about .about-timeline-body p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
  margin: 0;
}

.page-about .about-milestone-figure img {
  width: 100%;
  object-fit: cover;
  border-radius: 8px;
}

.page-about .about-tech-tree {
  display: grid;
  gap: 20px;
}

.page-about .about-tech-node {
  border: 1px solid var(--glass-stroke);
  border-left: 3px solid var(--neon-purple);
  border-radius: 14px;
  background: rgba(42, 59, 76, 0.3);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-about .about-tech-node:hover,
.page-about .about-tech-node:focus-within {
  border-color: rgba(255, 215, 0, 0.5);
  background: rgba(42, 59, 76, 0.45);
}

.page-about .about-tech-node[open] {
  border-color: rgba(138, 43, 226, 0.45);
  background: rgba(42, 59, 76, 0.5);
}

.page-about .about-tech-node summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px;
}

.page-about .about-tech-node summary::-webkit-details-marker {
  display: none;
}

.page-about .about-tech-node summary:focus-visible {
  outline: 2px solid var(--neon-purple);
  outline-offset: -2px;
  border-radius: 14px;
}

.page-about .about-tech-node-index {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  color: var(--neon-purple);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid rgba(138, 43, 226, 0.5);
  flex-shrink: 0;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-tech-node:hover .about-tech-node-index,
.page-about .about-tech-node[open] .about-tech-node-index {
  color: var(--electric-gold);
  border-color: rgba(255, 215, 0, 0.5);
}

.page-about .about-tech-node-title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 500;
  color: var(--mineral-cream);
  flex: 1;
}

.page-about .about-tech-node-metric {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--electric-gold);
  background: rgba(255, 215, 0, 0.1);
  border: 1px solid rgba(255, 215, 0, 0.2);
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.page-about .about-tech-node summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--mineral-terracotta);
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.page-about .about-tech-node[open] summary::after {
  content: "−";
}

.page-about .about-tech-detail {
  padding: 0 20px 22px 78px;
}

.page-about .about-tech-detail p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
  margin: 0 0 10px;
}

.page-about .about-tech-detail p:last-child {
  margin-bottom: 0;
}

.page-about .about-team-grid {
  display: grid;
  gap: 40px;
}

.page-about .about-team-para {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
  margin: 0 0 18px;
}

.page-about .about-team-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 26px 0;
}

.page-about .about-team-stat {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text-muted);
  background: rgba(42, 59, 76, 0.4);
  border: 1px solid var(--glass-stroke);
  padding: 14px 6px;
  text-align: center;
  border-radius: 10px;
}

.page-about .about-team-stat strong {
  font-family: var(--font-mono);
  font-size: 25px;
  font-weight: 500;
  display: block;
  color: var(--electric-gold);
  line-height: 1.2;
  margin-bottom: 4px;
}

.page-about .about-team-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-muted);
  background: rgba(92, 107, 77, 0.16);
  border-left: 3px solid var(--mineral-moss);
  padding: 14px 16px;
  border-radius: 0 8px 8px 0;
  margin: 0 0 24px;
}

.page-about .about-team-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-team-figure img {
  width: 100%;
  object-fit: cover;
  border-radius: 8px;
}

@media (min-width: 600px) {
  .page-about .about-hero-meta {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .about-tech-detail {
    padding-left: 78px;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero {
    padding: 56px 40px 72px;
  }

  .page-about .section {
    padding: 80px 40px;
  }

  .page-about .about-guardian-grid {
    grid-template-columns: 1.05fr 1fr;
    gap: 56px;
    align-items: center;
  }

  .page-about .about-milestone-layout {
    grid-template-columns: 1fr 400px;
    gap: 56px;
    align-items: start;
  }

  .page-about .about-milestone-figure {
    position: sticky;
    top: 160px;
  }

  .page-about .about-tech-tree {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .page-about .about-team-grid {
    grid-template-columns: 1.05fr 400px;
    gap: 56px;
    align-items: center;
  }
}

@media (min-width: 1280px) {
  .page-about .about-hero {
    padding-left: 48px;
    padding-right: 48px;
  }

  .page-about .about-guardian-grid,
  .page-about .about-milestone-layout,
  .page-about .about-team-grid {
    gap: 72px;
  }
}