.page-about {
  --about-side-w: 220px;
  --about-content-w: 760px;
  --about-radius: 18px;
  --about-chess-gold: rgba(212, 175, 55, 0.07);
  --about-grad-purple: linear-gradient(135deg, rgba(123, 47, 247, 0.28), rgba(0, 194, 255, 0.06));
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  line-height: 1.75;
}

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

.page-about .breadcrumb {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 28px var(--container-pad) 0;
}

.page-about .about-hero {
  position: relative;
  padding: 40px var(--container-pad) 64px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(45deg, var(--about-chess-gold) 25%, transparent 25%),
    linear-gradient(-45deg, var(--about-chess-gold) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, var(--about-chess-gold) 75%),
    linear-gradient(-45deg, transparent 75%, var(--about-chess-gold) 75%);
  background-size: 32px 32px;
  background-position: 0 0, 0 16px, 16px -16px, -16px 0;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: '';
  position: absolute;
  top: -90px;
  right: -90px;
  width: 260px;
  height: 260px;
  background: var(--about-grad-purple);
  transform: rotate(12deg);
  pointer-events: none;
  border-radius: 24px;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  gap: 28px;
}

.page-about .about-hero-copy .index-label {
  margin-bottom: 18px;
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 6vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 20px;
}

.page-about .about-hero-subtitle {
  color: var(--color-text-secondary);
  font-size: 16px;
  max-width: 540px;
  margin: 0 0 30px;
}

.page-about .about-hero-frame {
  position: relative;
  border: 1px solid var(--color-border);
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--color-bg-secondary);
}

.page-about .about-hero-frame::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-gold), transparent);
  opacity: 0.36;
  z-index: 1;
  border-radius: 0 0 56px 0;
}

.page-about .about-hero-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 48px rgba(11, 27, 61, 0.42);
  pointer-events: none;
}

.page-about .about-hero-frame img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about .about-section {
  padding: 56px var(--container-pad);
  position: relative;
}

.page-about .about-section-milestones {
  background: rgba(5, 11, 24, 0.32);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.page-about .about-section-certs {
  background: linear-gradient(180deg, transparent, rgba(123, 47, 247, 0.04));
}

.page-about .about-section-grid {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  gap: 30px;
}

.page-about .about-aside {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-aside::before {
  content: '';
  display: block;
  width: 36px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gold), transparent);
  margin-bottom: 4px;
}

.page-about .about-aside .mono-label {
  color: var(--color-gold);
  font-size: 14px;
  letter-spacing: 0.14em;
  margin: 0;
}

.page-about .about-aside h2 {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--color-text-primary);
}

.page-about .about-content {
  max-width: var(--about-content-w);
}

.page-about .about-lede {
  font-size: 18px;
  font-weight: 500;
  color: var(--color-text-primary);
  margin: 0 0 16px;
}

.page-about .about-content p {
  color: var(--color-text-secondary);
  margin: 0 0 16px;
}

.page-about .about-content strong {
  color: var(--color-gold-light);
  font-weight: 600;
}

.page-about .about-quote {
  margin: 24px 0 0;
  padding: 10px 0 10px 24px;
  border-left: 2px solid var(--color-gold);
  border-radius: 0 12px 12px 0;
  background: linear-gradient(90deg, rgba(212, 175, 55, 0.06), transparent);
  font-size: 18px;
  color: var(--color-text-primary);
}

.page-about .about-timeline {
  border-top: 1px solid var(--color-border);
}

.page-about .about-timeline-item {
  border-bottom: 1px solid var(--color-border);
  padding: 20px 0;
}

.page-about .about-timeline-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.page-about .about-timeline-year {
  color: var(--color-gold);
  font-size: 14px;
  letter-spacing: 0.06em;
  min-width: 64px;
  padding-top: 6px;
  margin: 0;
}

.page-about .about-timeline-trigger {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  color: var(--color-text-primary);
  text-align: left;
  transition: color var(--transition-fast);
}

.page-about .about-timeline-trigger:hover {
  color: var(--color-gold-light);
}

.page-about .about-timeline-title {
  flex: 1;
}

.page-about .about-timeline-icon {
  flex: 0 0 24px;
  width: 24px;
  height: 24px;
  border: 1px solid rgba(212, 175, 55, 0.5);
  border-radius: 50%;
  position: relative;
}

.page-about .about-timeline-icon::before,
.page-about .about-timeline-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-gold);
}

.page-about .about-timeline-icon::before {
  width: 10px;
  height: 1.5px;
}

.page-about .about-timeline-icon::after {
  width: 1.5px;
  height: 10px;
}

.page-about .about-timeline-item[data-open] .about-timeline-icon::after {
  display: none;
}

.page-about .about-timeline-item[data-open] .about-timeline-trigger {
  color: var(--color-gold-light);
}

.page-about .about-timeline-panel {
  padding: 8px 0 0;
  color: var(--color-text-secondary);
}

.page-about .about-timeline-panel p {
  margin: 0 0 12px;
}

.page-about .about-timeline-panel ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
}

.page-about .about-tech-grid {
  display: grid;
  gap: 18px;
  margin: 30px 0 0;
}

.page-about .about-tech-grid .glass-card {
  padding: 28px 26px;
  border-radius: var(--about-radius);
  transition: transform var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.page-about .about-tech-grid .glass-card:hover {
  transform: translateY(-4px);
  border-color: rgba(212, 175, 55, 0.4);
  box-shadow: var(--gold-glow);
}

.page-about .about-tech-grid .tag {
  display: inline-block;
  padding: 4px 12px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-gold);
  font-size: 12px;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}

.page-about .about-tech-grid h3 {
  font-size: 20px;
  font-weight: 600;
  font-family: var(--font-display);
  color: var(--color-text-primary);
  margin: 0 0 12px;
}

.page-about .about-tech-grid p {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin: 0;
}

.page-about .about-tech-figure {
  margin: 36px 0 0;
}

.page-about .about-tech-media {
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
}

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

.page-about .about-tech-figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
}

.page-about .about-cert-list {
  display: grid;
  gap: 16px;
}

.page-about .about-cert-item {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px 24px;
  background: linear-gradient(135deg, rgba(26, 58, 107, 0.42), rgba(11, 27, 61, 0.65));
  border: 1px solid var(--color-border);
  border-radius: var(--about-radius);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.page-about .about-cert-item:hover {
  border-color: rgba(212, 175, 55, 0.45);
  box-shadow: 0 12px 32px rgba(5, 11, 24, 0.45);
}

.page-about .about-cert-key {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--color-gold);
  margin: 0;
}

.page-about .about-cert-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
  margin: 0 0 8px;
}

.page-about .about-cert-body p {
  margin: 0;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.page-about .about-team-figure {
  margin: 36px 0 0;
}

.page-about .about-team-media {
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
}

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

.page-about .about-team-figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
}

.page-about .about-connect {
  padding: 68px var(--container-pad) 80px;
  position: relative;
  background: linear-gradient(180deg, transparent, rgba(5, 11, 24, 0.85));
}

.page-about .about-connect::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--color-gold), transparent 72%);
}

.page-about .about-connect-inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.page-about .about-connect .index-label {
  margin-bottom: 16px;
}

.page-about .about-connect h2 {
  font-size: 30px;
  font-family: var(--font-display);
  color: var(--color-text-primary);
  margin: 0 0 16px;
}

.page-about .about-connect p {
  color: var(--color-text-secondary);
  margin: 0 0 28px;
}

.page-about .about-connect-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

@media (min-width: 640px) {
  .page-about .about-timeline-panel {
    padding-left: 80px;
  }
}

@media (min-width: 768px) {
  .page-about .about-tech-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-cert-item {
    flex-direction: row;
    align-items: flex-start;
    gap: 24px;
  }

  .page-about .about-cert-key {
    min-width: 80px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 76px var(--container-pad) 84px;
  }

  .page-about .about-hero-inner {
    grid-template-columns: 1fr 0.95fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .about-hero-copy h1 {
    font-size: clamp(40px, 4vw, 56px);
  }

  .page-about .about-section {
    padding: 88px var(--container-pad);
  }

  .page-about .about-section-grid {
    grid-template-columns: var(--about-side-w) 1fr;
    gap: 64px;
  }

  .page-about .about-aside {
    position: sticky;
    top: 120px;
    align-self: start;
  }
}