.page-about{
  --about-highlight: var(--accent-orange);
  --about-cyan: var(--accent-cyan);
  background: var(--bg-deep);
  color: var(--text-light);
  font-family: var(--font-sans);
  line-height: 1.6;
}

.page-about .mono{
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.page-about .breadcrumbs{
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

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

.page-about .breadcrumbs a:hover{
  color: var(--accent-orange);
}

.page-about .breadcrumb-sep{
  opacity: 0.5;
}

.page-about .about-hero{
  position: relative;
  padding: 3rem 0 4.5rem;
  background:
    radial-gradient(ellipse 80% 60% at 85% 0%, rgba(77,93,249,0.14) 0%, transparent 70%),
    linear-gradient(180deg, rgba(255,92,0,0.04) 0%, transparent 100%);
  border-bottom: 1px solid var(--border-subtle);
  overflow: hidden;
}

.page-about .about-hero::before{
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent 0%, var(--accent-blue) 25%, var(--accent-cyan) 60%, var(--accent-orange) 100%);
}

.page-about .about-hero::after{
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 32%;
  height: 100%;
  background-image:
    linear-gradient(rgba(42,50,64,0.35) 1px, transparent 1px),
    linear-gradient(90deg, rgba(42,50,64,0.35) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(to left, rgba(0,0,0,0.6), transparent);
  pointer-events: none;
}

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

.page-about .about-hero-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

.page-about .about-hero-kicker{
  display: inline-block;
  font-size: 0.78rem;
  color: var(--accent-cyan);
  background: rgba(0,229,204,0.08);
  border: 1px solid rgba(0,229,204,0.2);
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}

.page-about .about-hero-title{
  margin: 0 0 1.5rem;
  font-size: clamp(2rem, 5vw, 3.75rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text-light);
}

.page-about .about-hero-title-line{
  display: block;
}

.page-about .about-hero-title-accent{
  display: block;
  color: var(--accent-orange);
}

.page-about .about-hero-lead{
  max-width: 46rem;
  font-size: 1.0625rem;
  color: var(--text-muted);
  margin-bottom: 0;
  border-left: 2px solid var(--accent-blue);
  padding-left: 1.25rem;
}

.page-about .about-hero-meta{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
}

.page-about .about-hero-meta-item{
  background: rgba(21,26,33,0.72);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 0.9rem 1rem;
  backdrop-filter: blur(4px);
}

.page-about .about-hero-meta-item span{
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.35rem;
}

.page-about .about-hero-meta-item strong{
  font-size: 1.05rem;
  color: var(--text-light);
  font-weight: 700;
}

.page-about .about-section{
  padding: 4rem 0;
  border-bottom: 1px solid var(--border-subtle);
}

.page-about .about-layout{
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.page-about .about-sidebar{
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.page-about .about-index{
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-orange);
  background: rgba(255,92,0,0.08);
  border: 1px solid rgba(255,92,0,0.2);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  margin-bottom: 0.25rem;
}

.page-about .about-sidebar .section-title{
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--text-light);
}

.page-about .about-sidebar-note{
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: 0;
  max-width: 16rem;
}

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

.page-about .about-story-prose{
  font-size: 1rem;
  color: var(--text-muted);
}

.page-about .about-story-prose p{
  margin-bottom: 1.25rem;
}

.page-about .about-story-prose p:first-child::first-letter{
  font-size: 2.8em;
  font-weight: 800;
  float: left;
  line-height: 1;
  padding-right: 0.15em;
  color: var(--accent-orange);
}

.page-about .about-story-cards{
  margin-top: 2rem;
}

.page-about .about-story-cards .data-card{
  height: 100%;
}

.page-about .about-milestones{
  background: var(--bg-surface);
}

.page-about .about-milestone-lead{
  color: var(--text-muted);
  font-size: 1rem;
  max-width: 42rem;
  margin: 0 0 2.5rem;
  border-left: 2px solid var(--accent-cyan);
  padding-left: 1.25rem;
}

.page-about .about-timeline{
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .timeline-item{
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 1rem;
  padding: 1rem 0 1.5rem;
  position: relative;
}

.page-about .timeline-item::before{
  content: "";
  position: absolute;
  left: 6.1rem;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--border-subtle), var(--accent-blue) 80%);
}

.page-about .timeline-item:not(:last-child)::after{
  content: "";
  position: absolute;
  left: 5.85rem;
  top: 2.4rem;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(0,229,204,0.12);
}

.page-about .timeline-year{
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-orange);
  padding-top: 0.35rem;
  text-align: right;
  white-space: nowrap;
}

.page-about .timeline-body{
  padding-left: 1.5rem;
}

.page-about .timeline-body h3{
  font-size: 1.15rem;
  font-weight: 700;
  margin: 0 0 0.4rem;
  color: var(--text-light);
}

.page-about .timeline-body p{
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.page-about .about-milestone-img{
  margin-top: 2.5rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
}

.page-about .about-milestone-img img{
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.page-about .about-stats{
  background: var(--bg-deep);
}

.page-about .about-stats-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .about-stat-block{
  position: relative;
  background: linear-gradient(135deg, rgba(21,26,33,0.9) 0%, rgba(16,20,27,0.9) 100%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 1.5rem 1.25rem 1.25rem;
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.page-about .about-stat-block::before{
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-orange));
}

.page-about .about-stat-block:hover{
  transform: translateY(-2px);
  border-color: rgba(77,93,249,0.4);
}

.page-about .about-stat-num{
  display: block;
  font-size: 2.4rem;
  line-height: 1.1;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.6rem;
  color: var(--text-light);
}

.page-about .about-stat-block[data-accent="blue"] .about-stat-num{
  color: var(--accent-blue);
}

.page-about .about-stat-block[data-accent="orange"] .about-stat-num{
  color: var(--accent-orange);
}

.page-about .about-stat-block[data-accent="cyan"] .about-stat-num{
  color: var(--accent-cyan);
}

.page-about .about-stat-label{
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 0.5rem;
}

.page-about .about-stat-block p{
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.page-about .about-stats-foot{
  margin-top: 1.5rem;
  background: rgba(0,229,204,0.04);
  border-left: 3px solid var(--accent-cyan);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-about .about-stats-caption{
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.page-about .about-stats-img{
  margin-top: 1.5rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
}

.page-about .about-stats-img img{
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.page-about .about-certs{
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--bg-deep) 100%);
}

.page-about .about-cert-grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .cert-card{
  perspective: 1200px;
  height: 240px;
  cursor: pointer;
}

.page-about .cert-card-inner{
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.45s ease;
}

.page-about .cert-card:hover .cert-card-inner,
.page-about .cert-card:focus .cert-card-inner,
.page-about .cert-card:focus-within .cert-card-inner{
  transform: rotateY(180deg);
}

.page-about .cert-card-front,
.page-about .cert-card-back{
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: 1.5rem;
  overflow: hidden;
}

.page-about .cert-card-front::after{
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(77,93,249,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.page-about .cert-card-back{
  transform: rotateY(180deg);
  background: var(--bg-elevated);
  border-color: var(--accent-blue);
}

.page-about .cert-card-back p{
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.page-about .cert-card-icon{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-sm);
  background: rgba(77,93,249,0.1);
  border: 1px solid rgba(77,93,249,0.3);
  color: var(--accent-blue);
  margin-bottom: 1rem;
}

.page-about .cert-card-icon svg{
  width: 1.75rem;
  height: 1.75rem;
}

.page-about .cert-card h3{
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-light);
  margin: 0 0 0.35rem;
}

.page-about .cert-card-sub{
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

.page-about .about-tech-strip{
  margin-top: 1.5rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .about-tech-strip-item{
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: rgba(21,26,33,0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
}

.page-about .about-tech-icon{
  font-size: 1.5rem;
  line-height: 1.2;
  color: var(--accent-cyan);
  background: rgba(0,229,204,0.06);
  border: 1px solid rgba(0,229,204,0.2);
  border-radius: var(--radius-sm);
  width: 2.6rem;
  height: 2.6rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.page-about .about-tech-strip-item strong{
  display: block;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--text-light);
  margin-bottom: 0.2rem;
}

.page-about .about-tech-strip-item p{
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.page-about .about-cert-img{
  margin-top: 1.5rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
}

.page-about .about-cert-img img{
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-lg);
  object-fit: cover;
}

.page-about .about-more{
  padding: 3.5rem 0;
  background: var(--bg-deep);
}

.page-about .about-more-inner{
  text-align: center;
}

.page-about .about-more-lead{
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 1.5rem;
}

.page-about .about-more-links{
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8rem;
  margin-bottom: 2rem;
}

.page-about .about-jump-links{
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

.page-about .about-jump-links a:hover{
  color: var(--accent-orange);
  border-color: var(--accent-orange);
}

@media (min-width: 540px){
  .page-about .about-stats-grid{
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-cert-grid{
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .about-tech-strip{
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px){
  .page-about .about-hero{
    padding: 3.5rem 0 5rem;
  }

  .page-about .about-hero-grid{
    grid-template-columns: 1fr 240px;
    gap: 3rem;
    align-items: start;
  }

  .page-about .about-hero-title-line{
    font-size: clamp(2.2rem, 5vw, 4rem);
  }

  .page-about .about-hero-title-accent{
    font-size: clamp(1.8rem, 4vw, 3rem);
  }

  .page-about .about-hero-meta{
    grid-template-columns: 1fr;
    gap: 0.65rem;
    margin-top: 1rem;
  }

  .page-about .about-section{
    padding: 5rem 0;
  }

  .page-about .about-layout{
    grid-template-columns: 220px 1fr;
    gap: 3rem;
  }

  .page-about .about-sidebar{
    position: sticky;
    top: 2rem;
    align-self: start;
  }

  .page-about .about-stat-num{
    font-size: 2.9rem;
  }

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

  .page-about .cert-card{
    height: 260px;
  }
}

@media (min-width: 1024px){
  .page-about .about-hero-grid{
    grid-template-columns: 1fr 300px;
    gap: 4rem;
  }

  .page-about .about-hero-meta{
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
  }

  .page-about .about-layout{
    grid-template-columns: 260px 1fr;
    gap: 4rem;
  }

  .page-about .about-timeline{
    padding-left: 1.5rem;
  }

  .page-about .timeline-item{
    grid-template-columns: 6.5rem 1fr;
    gap: 2rem;
  }

  .page-about .timeline-item::before{
    left: 7rem;
  }

  .page-about .timeline-item:not(:last-child)::after{
    left: 6.72rem;
  }

  .page-about .timeline-body{
    padding-left: 2rem;
  }
}