.page-about {
  --about-gold-gradient: linear-gradient(135deg, #D4AF37 0%, #B8860B 100%);
  --about-red-accent: #E74C3C;
  --about-bg-pattern: repeating-linear-gradient(90deg, rgba(212, 175, 55, 0.08) 0px, rgba(212, 175, 55, 0.08) 1px, transparent 1px, transparent 40px),
                      repeating-linear-gradient(180deg, rgba(212, 175, 55, 0.08) 0px, rgba(212, 175, 55, 0.08) 1px, transparent 1px, transparent 40px);
}

.page-about .breadcrumb {
  padding: 1.25rem 1rem 0.5rem;
  max-width: 1200px;
  margin: 0 auto;
  font-size: var(--small-size, 0.875rem);
  color: var(--secondary-black, #1A1A1A);
}

.page-about .breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0;
  margin: 0;
}

.page-about .breadcrumb li::after {
  content: "/";
  margin-left: 0.5rem;
  color: var(--border-gold, #C9A96E);
}

.page-about .breadcrumb li:last-child::after {
  content: none;
}

.page-about .breadcrumb a {
  color: var(--secondary-black, #1A1A1A);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-about .breadcrumb a:hover {
  color: var(--primary-gold, #D4AF37);
}

.page-about .about-hero {
  background: var(--background-dark, #0D0D0D);
  color: var(--text-on-dark, #F5F5F5);
  padding: 3rem 0;
  border-bottom: 4px solid var(--primary-gold, #D4AF37);
}

.page-about .hero-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  align-items: center;
}

.page-about .hero-text {
  text-align: center;
  max-width: 600px;
}

.page-about .hero-text .heading-1 {
  font-family: var(--heading-font, 'Noto Serif SC', serif);
  font-size: var(--h1-size, 2.5rem);
  margin: 0 0 1rem;
  background: var(--about-gold-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.08em;
}

.page-about .hero-subtitle {
  font-size: 1.125rem;
  line-height: 1.7;
  color: rgba(245, 245, 245, 0.85);
}

.page-about .hero-visual {
  width: 100%;
  max-width: 600px;
}

.page-about .hero-img {
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: cover;
  border: 3px solid var(--border-gold, #C9A96E);
  border-radius: var(--border-radius, 0.375rem);
  box-shadow: 0 8px 24px rgba(212, 175, 55, 0.3);
}

.page-about .section {
  padding: 3rem 1rem;
}

.page-about .section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 2.5rem;
}

.page-about .section-header .heading-2 {
  font-family: var(--heading-font, 'Noto Serif SC', serif);
  font-size: var(--h2-size, 1.75rem);
  margin: 0 0 0.75rem;
  color: var(--secondary-black, #1A1A1A);
  border-bottom: 2px solid var(--primary-gold, #D4AF37);
  display: inline-block;
  padding-bottom: 0.5rem;
}

.page-about .section-pattern {
  background-color: var(--background-light, #FEFCF3);
  background-image: var(--about-bg-pattern);
}

.page-about .section-dark .section-header .heading-2 {
  color: var(--text-on-dark, #F5F5F5);
  border-bottom-color: var(--primary-red, #E74C3C);
}

.page-about .section-dark .section-header .text-small {
  color: rgba(245, 245, 245, 0.7);
}

.page-about .gene-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.page-about .gene-item {
  padding: 1.5rem;
  text-align: center;
  background: var(--background-light, #FEFCF3);
  border: 1px solid var(--border-gold, #C9A96E);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.page-about .gene-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(212, 175, 55, 0.25);
  border-color: var(--primary-gold, #D4AF37);
}

.page-about .gene-icon {
  margin-bottom: 1rem;
}

.page-about .gene-item .heading-3 {
  font-family: var(--heading-font, 'Noto Serif SC', serif);
  font-size: var(--h3-size, 1.25rem);
  margin: 0 0 0.75rem;
  color: var(--secondary-black, #1A1A1A);
}

.page-about .gene-item p {
  font-size: var(--body-size, 1rem);
  color: #555;
  line-height: 1.6;
}

.page-about .about-philosophy {
  background: var(--background-dark, #0D0D0D);
  color: var(--text-on-dark, #F5F5F5);
}

.page-about .philosophy-timeline {
  max-width: 700px;
  margin: 0 auto;
}

.page-about .timeline-item {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  background: rgba(245, 245, 245, 0.05);
  border: 1px solid var(--border-gold, #C9A96E);
  border-radius: var(--border-radius, 0.375rem);
  transition: background 0.2s ease, border-color 0.2s ease;
}

.page-about .timeline-item:hover {
  background: rgba(212, 175, 55, 0.1);
  border-color: var(--primary-gold, #D4AF37);
}

.page-about .timeline-marker {
  font-family: var(--heading-font, 'Noto Serif SC', serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-gold, #D4AF37);
  line-height: 1;
}

.page-about .timeline-content .heading-3 {
  font-family: var(--heading-font, 'Noto Serif SC', serif);
  font-size: var(--h3-size, 1.25rem);
  margin: 0 0 0.5rem;
  color: var(--accent-white, #F5F5F5);
}

.page-about .timeline-content p {
  font-size: var(--body-size, 1rem);
  color: rgba(245, 245, 245, 0.8);
  line-height: 1.7;
}

.page-about .about-collision {
  background: var(--background-light, #FEFCF3);
}

.page-about .collision-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}

.page-about .collision-text p {
  font-size: var(--body-size, 1rem);
  line-height: 1.8;
  color: #444;
  margin-bottom: 1.25rem;
}

.page-about .collision-icons {
  margin-top: 1.5rem;
}

.page-about .collision-icon-img {
  width: 100%;
  height: auto;
  max-height: 200px;
  object-fit: contain;
  border-radius: var(--border-radius, 0.375rem);
}

.page-about .collision-img {
  width: 100%;
  height: auto;
  max-height: 400px;
  object-fit: cover;
  border: 2px solid var(--border-gold, #C9A96E);
  border-radius: var(--border-radius, 0.375rem);
  box-shadow: var(--shadow-card, 0 4px 20px rgba(0,0,0,0.1));
}

.page-about .about-closing {
  background: var(--background-dark, #0D0D0D);
  color: var(--text-on-dark, #F5F5F5);
  text-align: center;
}

.page-about .closing-card {
  max-width: 700px;
  margin: 0 auto;
  padding: 2rem;
  background: rgba(245, 245, 245, 0.05);
  border: 1px solid var(--border-gold, #C9A96E);
}

.page-about .closing-quote {
  font-family: var(--heading-font, 'Noto Serif SC', serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--primary-gold, #D4AF37);
  margin: 0 0 1rem;
  line-height: 1.6;
  letter-spacing: 0.03em;
}

.page-about .closing-card .text-small {
  color: rgba(245, 245, 245, 0.7);
}

.page-about .closing-card .link {
  color: var(--primary-gold, #D4AF37);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.page-about .closing-card .link:hover {
  color: var(--link-hover, #FFD700);
}

/* Responsive: Tablet and up */
@media (min-width: 768px) {
  .page-about .breadcrumb {
    padding: 1.5rem 2rem 0.5rem;
  }

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

  .page-about .hero-inner {
    flex-direction: row;
    text-align: left;
    gap: 3rem;
    justify-content: space-between;
  }

  .page-about .hero-text {
    text-align: left;
    flex: 1 1 45%;
  }

  .page-about .hero-visual {
    flex: 1 1 45%;
  }

  .page-about .section {
    padding: 4rem 2rem;
  }

  .page-about .gene-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }

  .page-about .timeline-item {
    flex-direction: row;
    gap: 1.5rem;
    align-items: flex-start;
  }

  .page-about .timeline-marker {
    flex: 0 0 2.5rem;
    font-size: 1.75rem;
  }

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

  .page-about .closing-card {
    padding: 3rem;
  }
}

@media (min-width: 1024px) {
  .page-about .container {
    max-width: 1200px;
    margin: 0 auto;
  }

  .page-about .about-hero {
    padding: 6rem 0;
  }

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