.page-about {
  --about-bg-deep: #060F1F;
  --about-line: rgba(245, 183, 0, 0.55);
  --about-paper: #FDFBF7;
  --about-border: #D8CDBC;
  --about-ink: #1A1A1A;
  background: var(--color-cream);
  color: var(--color-ink);
  overflow-x: hidden;
}

.page-about .breadcrumb {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 18px var(--container-pad) 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-muted);
}

.page-about .breadcrumb ol {
  list-style: none;
  display: flex;
  gap: 10px;
  padding: 0;
  margin: 0;
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--color-muted);
}

.page-about .breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
}

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

.about-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-deep) 65%, var(--color-primary-light) 130%);
  color: var(--color-white);
  position: relative;
  overflow: hidden;
  padding: 88px 0 72px;
}

.about-hero::before {
  content: "";
  position: absolute;
  top: -60%;
  right: -12%;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(255, 107, 26, 0.22) 0%, transparent 62%);
  border-radius: 50%;
  pointer-events: none;
}

.about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 90px;
  background: linear-gradient(transparent, var(--color-primary-deep));
  pointer-events: none;
}

.about-hero-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  display: flex;
  flex-direction: column;
  gap: 48px;
  position: relative;
  z-index: 2;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-gold);
  margin: 0 0 18px;
}

.kicker-index {
  background: var(--color-accent);
  color: var(--color-white);
  font-weight: 700;
  padding: 4px 10px;
  font-size: 12px;
  border-radius: var(--radius-sm);
}

.about-hero h1 {
  font-family: var(--font-headline);
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 900;
  line-height: 1.16;
  margin: 0 0 22px;
  letter-spacing: -0.01em;
  max-width: 760px;
}

.hero-lead {
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.92);
  max-width: 640px;
  margin: 0 0 36px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.about-hero-stamp {
  display: flex;
  justify-content: center;
  align-items: center;
}

.stamp-ring {
  width: 200px;
  height: 200px;
  border: 2px dashed rgba(245, 183, 0, 0.6);
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  animation: stamp-rotate 40s linear infinite;
}

.stamp-ring::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid rgba(255, 107, 26, 0.45);
  border-radius: 50%;
}

.stamp-year {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1;
}

.stamp-text {
  font-family: var(--font-headline);
  font-size: 22px;
  font-weight: 900;
  color: var(--color-white);
  margin-top: 8px;
  letter-spacing: 4px;
}

.stamp-sub {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 2px;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 6px;
}

@keyframes stamp-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.section {
  padding: 76px 0;
}

.section-chapter {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--color-accent);
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 14px;
  text-transform: uppercase;
}

.section-chapter span {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 3px 8px;
  font-size: 11px;
  border-radius: var(--radius-sm);
}

.section-heading {
  font-family: var(--font-headline);
  font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 900;
  line-height: 1.22;
  color: var(--color-primary);
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}

.section-desc {
  font-size: 17px;
  line-height: 1.75;
  color: var(--color-muted);
  margin: 0 0 24px;
  max-width: 620px;
}

.section-philosophy {
  background: var(--color-cream);
  position: relative;
}

.origin-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

.origin-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--about-border);
  transform: rotate(-1.5deg);
}

.origin-visual img,
.tech-visual img {
  object-fit: cover;
  width: 100%;
}

.origin-content p:not(.section-desc):not(.section-chapter) {
  font-size: 16px;
  line-height: 1.78;
  color: var(--color-ink);
  margin: 0 0 18px;
}

.origin-points {
  list-style: none;
  padding: 0;
  margin: 0 0 30px;
}

.origin-points li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid #EDE6D9;
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-ink);
}

.origin-points li:last-child {
  border-bottom: none;
}

.point-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 4px;
}

.section-timeline {
  background: var(--color-primary);
  color: var(--color-white);
  position: relative;
}

.section-timeline::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 28px 28px;
  pointer-events: none;
}

.section-timeline .site-container {
  position: relative;
  z-index: 1;
}

.timeline-heading {
  max-width: 720px;
  margin-bottom: 56px;
}

.section-timeline .section-heading {
  color: var(--color-white);
}

.section-timeline .section-chapter {
  color: var(--color-gold);
}

.timeline-wrapper {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.timeline-line {
  position: absolute;
  left: 15px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(var(--color-accent), var(--color-gold), rgba(245, 183, 0, 0.2));
}

.timeline-item {
  position: relative;
  padding-left: 58px;
}

.timeline-dot {
  position: absolute;
  left: 8px;
  top: 20px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-cream);
  border: 3px solid var(--color-accent);
  box-shadow: 0 0 0 4px rgba(255, 107, 26, 0.15);
}

.timeline-card {
  background: var(--about-paper);
  color: var(--color-ink);
  padding: 24px 26px;
  border-radius: var(--radius-md);
  position: relative;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-card::before {
  content: "";
  position: absolute;
  top: 18px;
  left: -8px;
  width: 16px;
  height: 16px;
  background: var(--about-paper);
  transform: rotate(45deg);
  border-left: 1px solid var(--about-border);
  border-bottom: 1px solid var(--about-border);
}

.timeline-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  background: rgba(255, 107, 26, 0.1);
  padding: 3px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
}

.timeline-card h3 {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-primary);
  margin: 0 0 8px;
}

.timeline-card p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-ink);
  margin: 0;
}

.timeline-item:hover .timeline-card {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.24);
}

.timeline-footnote {
  max-width: 720px;
  margin: 52px auto 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 24px;
}

.section-tech {
  background: linear-gradient(180deg, var(--color-cream) 0%, #F7F0E4 100%);
  position: relative;
}

.tech-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
  align-items: center;
}

.tech-points {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 28px;
}

.tech-point {
  position: relative;
  padding: 22px 24px 22px 68px;
  background: var(--about-paper);
  border: 1px solid var(--about-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.tech-index {
  position: absolute;
  left: 18px;
  top: 20px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent);
  background: rgba(255, 107, 26, 0.1);
  border-radius: 6px;
  padding: 4px 8px;
}

.tech-point h3 {
  font-size: 18px;
  font-weight: 800;
  color: var(--color-primary);
  margin: 0 0 8px;
}

.tech-point p {
  font-size: 14px;
  line-height: 1.72;
  color: var(--color-ink);
  margin: 0;
}

.tech-visual {
  position: relative;
}

.tech-visual .img-cover {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.tech-data-card {
  position: absolute;
  right: 14px;
  bottom: 18px;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 18px 22px;
  border-radius: var(--radius-md);
  box-shadow: 0 8px 24px rgba(11, 29, 58, 0.35);
  transform: rotate(2deg);
}

.tech-data-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1px;
  color: rgba(255, 255, 255, 0.7);
  margin: 0 0 4px;
}

.tech-data-num {
  font-family: var(--font-headline);
  font-size: 40px;
  font-weight: 900;
  color: var(--color-gold);
  margin: 0;
  line-height: 1.1;
}

.tech-data-num span {
  font-size: 22px;
  color: var(--color-accent);
}

.section-honor {
  background: var(--color-cream);
}

.honor-heading {
  max-width: 700px;
  margin-bottom: 48px;
}

.honor-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.honor-item {
  background: var(--about-paper);
  border: 1px solid var(--about-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s ease;
}

.honor-item:hover {
  box-shadow: var(--shadow-md);
}

.honor-year {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-muted);
  display: block;
  margin-bottom: 12px;
}

.honor-icon {
  width: 34px;
  height: 34px;
  color: var(--color-gold);
  margin-bottom: 16px;
}

.honor-item h3 {
  font-size: 19px;
  font-weight: 800;
  color: var(--color-primary);
  margin: 0 0 10px;
}

.honor-item p {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--color-ink);
  margin: 0;
}

.section-mission {
  background: var(--color-primary-deep);
  padding: 0;
}

.mission-banner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 72px var(--container-pad);
  display: flex;
  flex-direction: column;
  gap: 32px;
  align-items: flex-start;
}

.mission-copy h2 {
  font-family: var(--font-headline);
  font-size: clamp(26px, 3.2vw, 38px);
  font-weight: 900;
  color: var(--color-white);
  margin: 0 0 14px;
}

.mission-copy p {
  font-size: 16px;
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.82);
  max-width: 620px;
  margin: 0;
}

.mission-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

@media (min-width: 768px) {
  .about-hero-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .origin-layout {
    grid-template-columns: 1fr 1.1fr;
    gap: 64px;
  }

  .tech-layout {
    grid-template-columns: 1.1fr 1fr;
    gap: 64px;
  }

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

  .mission-banner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .about-hero {
    padding: 120px 0 96px;
  }

  .timeline-wrapper {
    gap: 36px;
  }

  .timeline-line {
    left: 50%;
    margin-left: -1px;
  }

  .timeline-item {
    padding-left: 0;
    width: 50%;
  }

  .timeline-item:nth-child(odd) {
    padding-right: 56px;
    text-align: right;
  }

  .timeline-item:nth-child(odd) .timeline-dot {
    left: auto;
    right: -8px;
  }

  .timeline-item:nth-child(odd) .timeline-card::before {
    left: auto;
    right: -8px;
    border-left: none;
    border-right: 1px solid var(--about-border);
    border-top: 1px solid var(--about-border);
    border-bottom: none;
  }

  .timeline-item:nth-child(even) {
    margin-left: 50%;
    padding-left: 56px;
  }

  .timeline-item:nth-child(even) .timeline-dot {
    left: -8px;
  }

  .section-tech {
    padding: 88px 0;
  }
}

@media (max-width: 480px) {
  .page-about .btn-lg {
    width: 100%;
    justify-content: center;
  }

  .about-hero {
    padding: 64px 0 56px;
  }

  .stamp-ring {
    width: 150px;
    height: 150px;
  }
}