.page-about {
  --about-index-w: 240px;
  background: var(--bg);
  color: var(--near-white);
  scroll-behavior: smooth;
}

.page-about .about-hero {
  padding: 32px 0 40px;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  margin-bottom: 40px;
}

.page-about .about-hero::after {
  content: '';
  position: absolute;
  right: -80px;
  top: -80px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(255, 122, 26, 0.15), transparent 70%);
  border-radius: 50%;
  z-index: 0;
  pointer-events: none;
}

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

.page-about .about-hero__title {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 16px 0 16px;
}

.page-about .about-hero__title span {
  display: block;
  font-weight: 400;
  font-size: 0.55em;
  color: var(--muted);
  letter-spacing: 0.01em;
  margin-top: 8px;
}

.page-about .about-hero__lead {
  font-size: 1.125rem;
  color: var(--muted);
  max-width: 720px;
  line-height: 1.8;
}

.page-about .about-layout {
  display: block;
}

.page-about .about-index {
  margin-bottom: 32px;
  padding: 20px;
  background: rgba(19, 28, 46, 0.7);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(8px);
}

.page-about .about-index__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--muted);
  margin-bottom: 12px;
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.page-about .about-index__list li {
  flex: 1 1 auto;
}

.page-about .about-index__list a {
  display: block;
  padding: 12px 18px;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--near-white);
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.page-about .about-index__list a:hover {
  background: rgba(255, 122, 26, 0.08);
  border-color: var(--orange);
  color: var(--orange-soft);
}

.page-about .about-index__contact {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-index__contact span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  width: 100%;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.page-about .about-index__contact a {
  font-size: 0.85rem;
  color: var(--link);
  text-decoration: none;
  padding: 4px 8px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border);
}

.page-about .about-index__contact a:hover {
  color: var(--orange-soft);
  border-color: var(--orange);
}

.page-about .about-content {
  min-width: 0;
}

.page-about .about-section {
  margin-bottom: 80px;
  scroll-margin-top: 96px;
}

.page-about .about-section__title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 1.75rem;
  font-weight: 700;
  border-bottom: 1px solid var(--border);
  padding-bottom: 16px;
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}

.page-about .about-section__index {
  font-family: var(--font-mono);
  color: var(--orange);
  font-size: 1rem;
}

.page-about .about-section p {
  color: var(--muted);
  line-height: 1.8;
}

.page-about .about-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
}

.page-about .about-section img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  margin-top: 24px;
}

.page-about .about-origin__img {
  margin-top: 0;
  width: 100%;
  object-fit: cover;
}

.page-about .about-milestones__img {
  width: 100%;
  object-fit: cover;
}

.page-about .about-timeline {
  margin-top: 24px;
  padding-left: 28px;
  border-left: 2px solid var(--border);
}

.page-about .timeline-item {
  position: relative;
  margin-bottom: 20px;
}

.page-about .timeline-item summary {
  cursor: pointer;
  list-style: none;
  position: relative;
  font-weight: 600;
  font-size: 1rem;
  color: var(--near-white);
  padding: 8px 0;
}

.page-about .timeline-item summary::-webkit-details-marker {
  display: none;
}

.page-about .timeline-item summary::before {
  content: '';
  position: absolute;
  left: -35px;
  top: 16px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--card);
  border: 2px solid var(--orange);
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.page-about .timeline-item[open] summary::before {
  background: var(--orange);
  box-shadow: 0 0 12px rgba(255, 122, 26, 0.8);
}

.page-about .timeline-item p {
  margin: 0 0 8px;
  padding-left: 0;
  line-height: 1.7;
}

.page-about .about-data__img {
  width: 100%;
  object-fit: cover;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 24px;
}

.page-about .stat-card {
  background: linear-gradient(135deg, rgba(19, 28, 46, 0.8), rgba(19, 28, 46, 0.4));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 16px;
  text-align: center;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.page-about .stat-card__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--orange-soft);
  line-height: 1.2;
  text-shadow: 0 0 20px rgba(255, 179, 92, 0.4);
}

.page-about .stat-card__label {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
  margin-top: 4px;
}

.page-about .about-data__legend {
  margin-top: 16px;
}

.page-about .about-data__note {
  margin-top: 12px;
  font-size: 0.9rem;
}

.page-about .about-philosophy__lead {
  font-size: 1.125rem;
  margin-bottom: 24px;
}

.page-about .about-philosophy__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .philosophy-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.page-about .philosophy-card h3 {
  color: var(--orange-soft);
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.page-about .philosophy-card p {
  margin: 0;
}

.page-about .about-team__intro {
  margin-bottom: 24px;
}

.page-about .about-team__values {
  list-style: none;
  padding: 0;
  margin: 24px 0;
}

.page-about .about-team__values li {
  border-left: 2px solid var(--orange);
  padding: 8px 0 8px 20px;
  margin-bottom: 12px;
  color: var(--muted);
  line-height: 1.7;
}

.page-about .about-team__values strong {
  color: var(--near-white);
  display: block;
  font-size: 1rem;
}

.page-about .about-team__more {
  color: var(--muted);
  line-height: 1.8;
}

.page-about .about-team__more a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-team__more a:hover {
  color: var(--orange-soft);
  border-color: var(--orange-soft);
}

.page-about .about-team__contact {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.8;
}

@media (min-width: 640px) {
  .page-about .about-origin__grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(4, 1fr);
  }

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

@media (min-width: 900px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 88px;
    padding: 24px 20px;
    background: linear-gradient(180deg, rgba(19, 28, 46, 0.9), rgba(10, 14, 26, 0.6));
  }

  .page-about .about-index__list {
    display: block;
  }

  .page-about .about-index__list li {
    margin-bottom: 4px;
  }

  .page-about .about-index__list a {
    padding: 10px 14px;
  }
}