.page-about {
  position: relative;
}

/* ===== Hero ===== */
.page-about .about-hero {
  position: relative;
  padding: 2rem 0 3.25rem;
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 78% 12%, rgba(75, 46, 255, 0.28), transparent 55%),
    linear-gradient(rgba(55, 255, 139, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(55, 255, 139, 0.05) 1px, transparent 1px);
  background-size: auto, 32px 32px, 32px 32px;
}
.page-about .about-hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}
.page-about .about-hero-kicker {
  display: inline-flex;
  align-items: center;
  margin: 0 0 1rem;
  padding: 0.35rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.page-about .about-hero h1 {
  margin: 0 0 1.25rem;
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-text);
}
.page-about .about-hero-accent {
  display: block;
  margin-top: 0.25rem;
  color: var(--color-primary);
}
.page-about .about-hero-lead {
  max-width: 36em;
  margin: 0 0 1.75rem;
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--color-text-muted);
}
.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.page-about .about-stat {
  padding: 1rem 1.1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 2px solid var(--color-primary);
  border-radius: var(--radius-md);
}
.page-about .about-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}
.page-about .about-stat-label {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}
.page-about .about-hero-note {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}
.page-about .about-hero-note a {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast);
}
.page-about .about-hero-note a:hover {
  border-bottom-color: var(--color-primary);
}
.page-about .about-hero-media {
  position: relative;
  z-index: 0;
}
.page-about .about-hero-media::after {
  content: "";
  position: absolute;
  right: -12px;
  bottom: -12px;
  width: 60%;
  height: 60%;
  border: 2px solid var(--color-secondary);
  border-radius: var(--radius-lg);
  opacity: 0.5;
  z-index: 0;
}
.page-about .about-hero-img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  object-fit: cover;
}

/* ===== Why ===== */
.page-about .about-why {
  padding: 3.5rem 0;
}
.page-about .about-why-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
.page-about .about-why-copy p {
  margin: 0 0 1.25rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}
.page-about .about-why-copy p:last-child {
  margin-bottom: 0;
}
.page-about .about-why-principles {
  display: grid;
  gap: 0.875rem;
}
.page-about .about-principle {
  position: relative;
  padding: 1.25rem 1.5rem 1.25rem 4.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition:
    border-color var(--transition-fast),
    background var(--transition-fast);
}
.page-about .about-principle:hover {
  border-color: var(--color-secondary);
  background: var(--color-surface-soft);
}
.page-about .about-principle-index {
  position: absolute;
  left: 1.25rem;
  top: 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-primary);
}
.page-about .about-principle h3 {
  margin: 0 0 0.4rem;
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--color-text);
}
.page-about .about-principle p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ===== Milestones ===== */
.page-about .about-milestones {
  padding: 3.5rem 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.page-about .about-milestones-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.25rem;
}
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0.5rem 0 0.5rem 1.75rem;
  list-style: none;
}
.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0.65rem;
  width: 2px;
  background: linear-gradient(
    180deg,
    var(--color-primary) 0%,
    var(--color-secondary) 50%,
    var(--color-primary) 100%
  );
  border-radius: var(--radius-pill);
  opacity: 0.85;
}
.page-about .about-timeline-item {
  position: relative;
  margin-bottom: 2rem;
  padding-left: 0.75rem;
}
.page-about .about-timeline-item:last-child {
  margin-bottom: 0;
}
.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: -1.4rem;
  top: 1.15rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow:
    0 0 0 4px rgba(55, 255, 139, 0.15),
    0 0 14px rgba(55, 255, 139, 0.7);
  transition: box-shadow var(--transition-fast);
}
.page-about .about-timeline-item:hover::before {
  box-shadow:
    0 0 0 4px rgba(55, 255, 139, 0.25),
    0 0 20px var(--color-primary);
}
.page-about .about-timeline-marker {
  margin-bottom: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-secondary);
}
.page-about .about-timeline-card {
  padding: 1.1rem 1.25rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition:
    border-color var(--transition-fast),
    transform var(--transition-fast);
}
.page-about .about-timeline-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}
.page-about .about-timeline-card .tag {
  margin-bottom: 0.5rem;
}
.page-about .about-timeline-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--color-text);
}
.page-about .about-timeline-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}
.page-about .about-milestones-media {
  display: flex;
  align-items: center;
}
.page-about .about-milestones-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  max-height: 420px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  object-fit: cover;
}

/* ===== Team ===== */
.page-about .about-team {
  padding: 3.5rem 0;
}
.page-about .about-team-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}
.page-about .about-team-copy p {
  margin: 0 0 1.25rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}
.page-about .about-team-list {
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
}
.page-about .about-team-list li {
  position: relative;
  padding: 0.85rem 0 0.85rem 1.4rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  line-height: 1.65;
}
.page-about .about-team-list li:last-child {
  border-bottom: none;
}
.page-about .about-team-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.25rem;
  width: 0.45rem;
  height: 0.45rem;
  background: var(--color-primary);
  border-radius: 2px;
}
.page-about .about-team-list strong {
  color: var(--color-text);
  font-weight: 800;
}
.page-about .about-team-roles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.875rem;
}
.page-about .about-role-card {
  padding: 1.25rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition:
    border-color var(--transition-fast),
    background var(--transition-fast);
}
.page-about .about-role-card:hover {
  border-color: var(--color-secondary);
  background: var(--color-surface-soft);
}
.page-about .about-role-icon {
  display: block;
  width: 44px;
  height: 44px;
  margin-bottom: 0.75rem;
}
.page-about .about-role-card h3 {
  margin: 0 0 0.25rem;
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-text);
}
.page-about .about-role-card p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}
.page-about .about-team-media {
  margin-top: 2rem;
}
.page-about .about-team-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  max-height: 380px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  object-fit: cover;
}

/* ===== Certification ===== */
.page-about .about-cert {
  padding: 3.5rem 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.page-about .about-cert-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
.page-about .about-cert-item {
  padding: 2rem 1.5rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: border-color var(--transition-fast);
}
.page-about .about-cert-item:hover {
  border-color: var(--color-primary);
}
.page-about .about-cert-seal {
  display: block;
  width: 96px;
  height: 96px;
  margin: 0 auto 1.25rem;
}
.page-about .about-cert-item h3 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--color-text);
}
.page-about .about-cert-item p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}
.page-about .about-cert-card {
  padding: 1.5rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.page-about .about-cert-card h3 {
  margin: 0 0 1rem;
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--color-text);
}
.page-about .about-cert-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-cert-list li {
  position: relative;
  padding: 0.65rem 0 0.65rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}
.page-about .about-cert-list li:last-child {
  border-bottom: none;
}
.page-about .about-cert-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.1rem;
  width: 0.4rem;
  height: 0.4rem;
  background: var(--color-secondary);
  border-radius: 50%;
}
.page-about .about-trust {
  margin-top: 1.5rem;
}

/* ===== Extend ===== */
.page-about .about-extend {
  padding: 3.5rem 0;
}
.page-about .about-extend-lead {
  max-width: 40rem;
  margin: 0 0 2rem;
  color: var(--color-text-muted);
  line-height: 1.75;
}
.page-about .about-extend-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}
.page-about .about-extend-card {
  display: block;
  padding: 1.4rem 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition:
    border-color var(--transition-fast),
    background var(--transition-fast),
    transform var(--transition-fast);
}
.page-about .about-extend-card:hover {
  border-color: var(--color-primary);
  background: var(--color-surface-soft);
  transform: translateY(-3px);
}
.page-about .about-extend-tag {
  display: inline-block;
  margin-bottom: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--color-secondary);
  text-transform: uppercase;
}
.page-about .about-extend-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--color-text);
}
.page-about .about-extend-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ===== Desktop ===== */
@media (min-width: 900px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 3rem;
  }
  .page-about .about-hero h1 {
    font-size: 2.6rem;
  }
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, 1fr);
  }
  .page-about .about-why-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: 3.5rem;
  }
  .page-about .about-milestones-layout {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 3.5rem;
    align-items: start;
  }
  .page-about .about-timeline {
    padding-left: 2rem;
  }
  .page-about .about-timeline::before {
    left: 0.9rem;
  }
  .page-about .about-timeline-item::before {
    left: -1.55rem;
  }
  .page-about .about-timeline-item:nth-child(2) {
    margin-left: 8%;
  }
  .page-about .about-timeline-item:nth-child(3) {
    margin-left: 16%;
  }
  .page-about .about-timeline-item:nth-child(4) {
    margin-left: 24%;
  }
  .page-about .about-timeline-item:nth-child(5) {
    margin-left: 32%;
  }
  .page-about .about-team-layout {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 3rem;
  }
  .page-about .about-cert-grid {
    grid-template-columns: 0.8fr 0.8fr 1.4fr;
    gap: 1.5rem;
  }
  .page-about .about-extend-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }
  .page-about .about-extend-card:nth-child(even) {
    transform: translateY(1.25rem);
  }
  .page-about .about-extend-card:nth-child(even):hover {
    transform: translateY(calc(1.25rem - 3px));
  }
}