.page-about {
  --about-gold-soft: rgba(255, 215, 0, 0.09);
  --about-gold-line: rgba(212, 175, 55, 0.38);
  --about-red-line: rgba(230, 0, 18, 0.6);
  --about-grid-line: rgba(212, 175, 55, 0.14);
  position: relative;
  background:
    radial-gradient(1200px 620px at 82% -8%, rgba(157, 78, 221, 0.16), transparent 60%),
    radial-gradient(900px 520px at 8% 28%, rgba(255, 215, 0, 0.08), transparent 55%),
    linear-gradient(180deg, rgba(10, 14, 26, 0.35), rgba(10, 14, 26, 0.55)),
    var(--c-bg);
  color: var(--c-text);
  padding: 32px 20px 72px;
}

.page-about .breadcrumb {
  max-width: 1240px;
  margin: 0 auto 40px;
}

.page-about .section-head {
  display: flex;
  align-items: stretch;
  gap: 16px;
  margin-bottom: 28px;
}

.page-about .section-head h2 {
  font-family: var(--font-head);
  font-size: clamp(1.6rem, 3.2vw, 2.6rem);
  line-height: 1.15;
  margin: 0;
}

.page-about .section-kicker {
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  color: var(--c-gold);
  margin: 0 0 4px;
}

.page-about .chapter-num {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--c-bg);
  background: linear-gradient(135deg, var(--c-gold), var(--c-red));
  padding: 4px 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  flex: 0 0 auto;
  align-self: flex-start;
}

.page-about .hero-section {
  max-width: 1240px;
  margin: 0 auto 76px;
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .hero-copy {
  position: relative;
  z-index: 2;
}

.page-about .hero-copy h1 {
  font-family: var(--font-head);
  font-size: clamp(2rem, 5vw, 4rem);
  line-height: 1.22;
  margin: 16px 0 22px;
  color: var(--c-gold);
  max-width: 14em;
}

.page-about .hero-copy h1::after {
  content: '';
  display: block;
  width: 180px;
  height: 8px;
  margin-top: 18px;
  background: linear-gradient(90deg, var(--c-red), var(--c-gold), var(--c-neon));
  transform: skewX(-14deg);
  border-radius: 2px;
}

.page-about .hero-lead {
  color: var(--c-muted);
  font-size: 1.05rem;
  line-height: 1.85;
  max-width: 58ch;
  margin: 0;
}

.page-about .hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 30px 0 0;
}

.page-about .stat-box {
  min-width: 124px;
  padding: 14px 18px;
  background: rgba(26, 31, 46, 0.78);
  border: 1px solid var(--about-gold-line);
  border-left: 4px solid var(--c-gold);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-gold);
}

.page-about .stat-num sup {
  font-size: 0.62em;
  color: var(--c-neon);
  margin-left: 2px;
}

.page-about .stat-label {
  font-size: 0.85rem;
  color: var(--c-muted);
  letter-spacing: 0.06em;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .hero-art {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
}

.page-about .hero-art::before {
  content: '';
  position: absolute;
  inset: 12% 8%;
  background: radial-gradient(closest-side, rgba(255, 215, 0, 0.22), transparent 70%);
  filter: blur(18px);
  z-index: 0;
}

.page-about .hero-art .hero-svg {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 520px;
  height: auto;
  filter: drop-shadow(0 18px 40px rgba(0, 0, 0, 0.5));
  animation: aboutBreathe 5.5s ease-in-out infinite;
}

@keyframes aboutBreathe {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.page-about .origin-section,
.page-about .milestones-section,
.page-about .culture-section,
.page-about .tech-section,
.page-about .community-section,
.page-about .future-section {
  max-width: 1240px;
  margin: 0 auto 76px;
}

.page-about .origin-layout {
  display: grid;
  gap: 20px;
}

.page-about .origin-copy {
  background: linear-gradient(160deg, rgba(26, 31, 46, 0.72), rgba(10, 14, 26, 0.38));
  border: 1px solid var(--about-gold-line);
  border-left: 5px solid var(--c-gold);
  padding: 27px 24px;
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
}

.page-about .origin-copy p {
  line-height: 1.9;
  color: var(--c-text);
  margin: 0 0 16px;
  max-width: 68ch;
}

.page-about .origin-copy p:last-child {
  margin-bottom: 0;
}

.page-about .origin-quote {
  border: none;
  margin: 20px 0 0;
  padding: 14px 28px 14px 34px;
  background: var(--about-gold-soft);
  color: var(--c-gold);
  font-family: var(--font-head);
  font-size: 1.3rem;
  line-height: 1.5;
  position: relative;
}

.page-about .origin-quote::before {
  content: '「';
  position: absolute;
  left: 10px;
  top: 4px;
  color: var(--c-red);
  font-size: 1.9rem;
  line-height: 1;
}

.page-about .origin-quote::after {
  content: '」';
  position: absolute;
  right: 14px;
  bottom: -4px;
  color: var(--c-red);
  font-size: 1.9rem;
  line-height: 1;
}

.page-about .origin-aside {
  background: rgba(157, 78, 221, 0.09);
  border: 1px solid var(--about-gold-line);
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.page-about .origin-aside::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  border-top: 44px solid rgba(157, 78, 221, 0.45);
  border-left: 44px solid transparent;
}

.page-about .aside-title {
  font-family: var(--font-head);
  font-size: 1.25rem;
  color: var(--c-gold);
  margin-bottom: 14px;
}

.page-about .info-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px 14px;
}

.page-about .info-list dt {
  color: var(--c-muted);
  white-space: nowrap;
}

.page-about .info-list dd {
  margin: 0;
  color: var(--c-text);
  font-family: var(--font-mono);
  font-size: 0.92rem;
}

.page-about .evo-figure {
  margin: 0 0 24px;
  padding: 10px;
  background: var(--c-panel);
  border: 1px solid var(--about-gold-line);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
  position: relative;
}

.page-about .evo-figure::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 30%, rgba(255, 215, 0, 0.18) 48%, transparent 62%);
  background-size: 220% 100%;
  animation: aboutShine 4.2s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes aboutShine {
  0% { background-position: -180% 0; }
  100% { background-position: 180% 0; }
}

.page-about .evo-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about .evo-figure figcaption,
.page-about .culture-photo figcaption,
.page-about .tech-diagram figcaption {
  padding: 12px 8px 4px;
  color: var(--c-muted);
  font-size: 0.9rem;
  text-align: center;
}

.page-about .timeline-svg-wrap {
  margin: 0 0 20px;
  padding: 6px 0 18px;
  border-bottom: 1px dashed var(--about-gold-line);
  overflow: hidden;
}

.page-about .timeline-svg {
  width: 100%;
  height: auto;
  display: block;
  min-width: 560px;
  margin: 0 auto;
}

.page-about .timeline-svg text {
  text-anchor: middle;
}

.page-about .timeline-track {
  position: relative;
}

.page-about .timeline-scroll {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.page-about .milestone-card {
  background: var(--c-panel);
  border: 1px solid var(--about-gold-line);
  padding: 26px 20px 20px;
  position: relative;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-about .milestone-card:hover,
.page-about .milestone-card:focus-within {
  border-color: var(--c-gold);
  box-shadow: 0 0 24px rgba(255, 215, 0, 0.1);
}

.page-about .milestone-card::before {
  content: attr(data-year);
  position: absolute;
  top: -10px;
  left: 18px;
  background: linear-gradient(135deg, var(--c-red), var(--c-gold));
  color: var(--c-bg);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.88rem;
  line-height: 1;
  padding: 5px 12px;
  letter-spacing: 0.08em;
  clip-path: polygon(0 0, calc(100% - 6px) 0, 100% 6px, 100% 100%, 6px 100%, 0 calc(100% - 6px));
}

.page-about .milestone-head {
  margin-bottom: 10px;
}

.page-about .milestone-head .tag-clip {
  display: inline-block;
  margin-bottom: 8px;
}

.page-about .milestone-head h3 {
  font-family: var(--font-head);
  font-size: 1.4rem;
  margin: 0;
  color: var(--c-gold);
  line-height: 1.3;
}

.page-about .milestone-card .accordion-panel {
  margin-top: 6px;
}

.page-about .milestone-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.page-about .culture-grid {
  display: grid;
  gap: 24px;
}

.page-about .culture-photo {
  margin: 0;
  background: var(--c-panel);
  border: 1px solid var(--about-gold-line);
  padding: 10px;
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
}

.page-about .culture-img,
.page-about .tech-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about .team-cards {
  display: grid;
  gap: 16px;
}

.page-about .team-card {
  background: rgba(26, 31, 46, 0.62);
  border: 1px solid var(--about-gold-line);
  border-bottom: 4px solid var(--c-gold);
  padding: 22px 20px;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.page-about .team-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 62px;
  height: 62px;
  background: linear-gradient(135deg, transparent 50%, rgba(255, 215, 0, 0.14) 50%);
  transition: opacity 0.3s ease;
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  transform: translateX(8px);
  border-color: var(--c-gold);
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.1);
}

.page-about .team-card h3 {
  font-family: var(--font-head);
  font-size: 1.3rem;
  margin: 0 0 8px;
  color: var(--c-gold);
}

.page-about .team-card p {
  color: var(--c-muted);
  line-height: 1.7;
  margin: 0;
}

.page-about .tech-grid {
  display: grid;
  gap: 16px;
  margin-bottom: 24px;
}

.page-about .tech-feature {
  background: rgba(10, 14, 26, 0.55);
  border: 1px solid rgba(0, 255, 135, 0.24);
  border-left: 5px solid var(--c-neon);
  padding: 20px;
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-about .tech-feature h3 {
  font-family: var(--font-head);
  font-size: 1.25rem;
  color: var(--c-neon);
  margin: 0 0 8px;
  line-height: 1.3;
}

.page-about .tech-feature p {
  color: var(--c-muted);
  line-height: 1.7;
  margin: 0;
}

.page-about .tech-diagram {
  margin: 0;
  background: var(--c-panel);
  border: 1px solid var(--about-gold-line);
  padding: 10px;
}

.page-about .community-panel {
  display: grid;
  gap: 22px;
  background: linear-gradient(120deg, rgba(230, 0, 18, 0.12), rgba(10, 14, 26, 0.4));
  border: 1px solid var(--about-gold-line);
  padding: 28px 24px;
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .community-copy p {
  line-height: 1.8;
  color: var(--c-text);
  margin: 0 0 16px;
}

.page-about .flow-steps {
  list-style: none;
  padding: 0;
  margin: 18px 0;
  display: grid;
  gap: 10px;
}

.page-about .flow-steps li {
  display: flex;
  align-items: center;
  gap: 14px;
  background: rgba(10, 14, 26, 0.55);
  border: 1px solid var(--about-gold-line);
  padding: 12px 16px;
  color: var(--c-text);
  font-weight: 500;
  line-height: 1.5;
}

.page-about .flow-steps li span {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--c-gold);
  min-width: 2.6em;
}

.page-about .community-tip {
  font-size: 0.95rem;
  color: var(--c-muted);
  border-top: 1px dashed var(--about-gold-line);
  padding-top: 14px;
  margin: 0;
}

.page-about .community-card {
  background: rgba(157, 78, 221, 0.1);
  border: 1px solid rgba(157, 78, 221, 0.4);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .community-card p {
  color: var(--c-muted);
  line-height: 1.75;
  margin: 0;
}

.page-about .future-panel {
  background: linear-gradient(135deg, rgba(230, 0, 18, 0.24), rgba(255, 215, 0, 0.12));
  border: 2px solid rgba(255, 215, 0, 0.42);
  padding: 34px 26px;
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 32px) 0, 100% 32px, 100% 100%, 32px 100%, 0 calc(100% - 32px));
}

.page-about .future-panel::after {
  content: '';
  position: absolute;
  right: -60px;
  top: -80px;
  width: 210px;
  height: 210px;
  border: 2px dashed rgba(255, 215, 0, 0.22);
  border-radius: 50%;
}

.page-about .future-panel p {
  font-size: 1.05rem;
  line-height: 1.9;
  color: var(--c-text);
  max-width: 72ch;
  position: relative;
  z-index: 1;
  margin: 0 0 24px;
}

.page-about .future-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  position: relative;
  z-index: 1;
}

.page-about .support-cta {
  max-width: 1240px;
  margin: 0 auto;
  background: var(--c-panel);
  border: 1px solid var(--about-gold-line);
  padding: 34px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-about .support-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(90deg, var(--c-gold), var(--c-red), var(--c-neon), var(--c-gold));
  background-size: 220% 100%;
  animation: aboutStripes 3.5s linear infinite;
}

@keyframes aboutStripes {
  0% { background-position: 0 0; }
  100% { background-position: 220% 0; }
}

.page-about .support-cta h2 {
  font-family: var(--font-head);
  font-size: 1.6rem;
  line-height: 1.4;
  margin: 10px auto 22px;
  max-width: 32ch;
  color: var(--c-text);
}

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

@media (max-width: 767px) {
  .page-about .timeline-svg-wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .page-about .timeline-scroll {
    display: flex;
    flex-direction: row;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding: 14px 4px 24px;
    scrollbar-width: thin;
    scrollbar-color: var(--c-gold) rgba(255, 255, 255, 0.06);
  }

  .page-about .timeline-scroll::-webkit-scrollbar {
    height: 6px;
  }

  .page-about .timeline-scroll::-webkit-scrollbar-thumb {
    background: var(--c-gold);
    border-radius: 6px;
  }

  .page-about .milestone-card {
    flex: 0 0 85%;
    scroll-snap-align: center;
  }

  .page-about .tech-grid {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 768px) {
  .page-about .origin-layout {
    grid-template-columns: 1.3fr 0.7fr;
    align-items: start;
  }

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

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

  .page-about .community-panel {
    grid-template-columns: 1.2fr 0.8fr;
    align-items: stretch;
  }

  .page-about .timeline-scroll {
    display: block;
  }

  .page-about .milestone-card {
    margin-bottom: 20px;
  }
}

@media (min-width: 1024px) {
  .page-about .hero-section {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
  }

  .page-about .culture-grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 36px;
  }

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

  .page-about .tech-diagram {
    max-width: 80%;
    margin-left: auto;
    margin-right: auto;
  }

  .page-about .timeline-track {
    padding-right: 140px;
  }

  .page-about .timeline-track::before {
    content: '';
    position: absolute;
    right: 46px;
    top: 28px;
    bottom: 28px;
    width: 4px;
    background: linear-gradient(180deg, var(--c-gold), var(--c-red) 65%, var(--c-neon));
    transform: skewX(-8deg);
    border-radius: 4px;
  }

  .page-about .milestone-card {
    margin-bottom: 20px;
  }

  .page-about .milestone-card::after {
    content: '';
    position: absolute;
    right: -88px;
    top: 32px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--c-gold);
    box-shadow: 0 0 0 5px rgba(255, 215, 0, 0.16), 0 0 20px var(--c-gold);
  }

  .page-about .milestone-card:nth-child(2)::after {
    background: var(--c-red);
    box-shadow: 0 0 0 5px rgba(230, 0, 18, 0.16), 0 0 20px var(--c-red);
  }

  .page-about .milestone-card:nth-child(3)::after {
    background: var(--c-neon);
    box-shadow: 0 0 0 5px rgba(0, 255, 135, 0.16), 0 0 20px var(--c-neon);
  }
}