.page-about {
  --about-rail: rgba(166, 160, 152, 0.13);
  --about-accent-dim: rgba(255, 107, 0, 0.15);
  position: relative;
  z-index: 0;
  background-color: var(--color-bg);
  background-image: radial-gradient(ellipse at 85% 0%, rgba(255, 107, 0, 0.08), transparent 46%);
  color: var(--color-ink);
  overflow-x: hidden;
}

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

.page-about a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.page-about .breadcrumb {
  margin: var(--space-5) 0 var(--space-4);
  font-size: 13px;
}

.page-about .breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.page-about .breadcrumb li {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-muted);
}

.page-about .breadcrumb li:not(:last-child)::after {
  content: "/";
  color: var(--color-border);
}

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

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

.page-about .breadcrumb [aria-current="page"] {
  color: var(--color-ink);
  font-weight: 600;
}

.page-about .page-hero {
  position: relative;
  padding: var(--space-3) 0 var(--space-7);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}

.page-about .page-hero::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -40px;
  width: 260px;
  height: 260px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  transform: rotate(14deg);
  pointer-events: none;
}

.page-about .page-hero::after {
  content: "";
  position: absolute;
  top: 6px;
  right: -58px;
  width: 200px;
  height: 200px;
  border: 1px solid var(--about-accent-dim);
  border-radius: 12px;
  transform: rotate(28deg);
  pointer-events: none;
}

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

.page-about .page-title {
  font-family: var(--font-display);
  font-size: clamp(32px, 4.6vw, 48px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: var(--space-3) 0 var(--space-4);
  max-width: 14em;
}

.page-about .page-lead {
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-muted);
  max-width: 44em;
  margin: 0 0 var(--space-6);
}

.page-about .hero-index {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  max-width: 660px;
}

.page-about .hero-index a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-panel);
  color: var(--color-ink);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background var(--ease), color var(--ease), padding-left var(--ease);
}

.page-about .hero-index a:hover,
.page-about .hero-index a:focus-visible {
  background: var(--color-accent);
  color: #fff;
  padding-left: var(--space-5);
  outline: none;
}

.page-about .section {
  position: relative;
  padding: var(--space-7) 0;
  border-top: 1px solid var(--color-border);
}

.page-about .section-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin: 0 0 var(--space-2);
}

.page-about .section h2 {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-3);
}

.page-about .section-intro {
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.7;
  max-width: 48em;
  margin: 0 0 var(--space-6);
}

.page-about .origin-section::after,
.page-about .timeline-section::after,
.page-about .tech-section::after,
.page-about .pricing-section::after,
.page-about .team-section::after,
.page-about .related-section::after {
  display: none;
  position: absolute;
  top: 18px;
  right: 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: rgba(166, 160, 152, 0.4);
  white-space: nowrap;
  pointer-events: none;
}

.page-about .origin-section::after { content: "ORIGIN / 01"; }
.page-about .timeline-section::after { content: "MILESTONE / 02"; }
.page-about .tech-section::after { content: "TECH.DATA / 03"; }
.page-about .pricing-section::after { content: "MEMBERSHIP / 04"; }
.page-about .team-section::after { content: "TEAM / 05"; }
.page-about .related-section::after { content: "INDEX / 06"; }

.page-about .origin-banner {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-7);
}

.page-about .origin-banner img {
  width: 100%;
  display: block;
}

.page-about .origin-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(10, 26, 47, 0.82), transparent 52%);
  pointer-events: none;
}

.page-about .origin-banner-mark {
  position: absolute;
  left: var(--space-5);
  bottom: var(--space-4);
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(242, 233, 224, 0.9);
  background: rgba(10, 26, 47, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 4px;
  padding: 4px 10px;
}

.page-about .origin-layout {
  display: grid;
  gap: var(--space-6);
}

.page-about .origin-copy p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-muted);
  margin: 0 0 var(--space-4);
}

.page-about .origin-copy .origin-intro-para {
  color: var(--color-ink);
  font-size: 17px;
}

.page-about .origin-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}

.page-about .stat-item {
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: 8px;
  background: var(--color-panel);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  transition: background var(--ease), border-color var(--ease);
}

.page-about .stat-item:hover {
  background: #182B44;
  border-color: var(--color-accent);
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
}

.page-about .stat-label {
  font-size: 14px;
  line-height: 1.5;
  color: var(--color-muted);
}

.page-about .timeline-section {
  background-image: linear-gradient(var(--about-rail) 1px, transparent 1px);
  background-size: 100% 96px;
}

.page-about .timeline-layout {
  display: grid;
  gap: var(--space-7);
}

.page-about .timeline-track {
  position: relative;
  padding-left: 24px;
}

.page-about .timeline-track::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-terra) 0%, var(--color-border) 40%, var(--color-border) 85%, transparent 100%);
}

.page-about .timeline-item {
  position: relative;
  margin-bottom: var(--space-5);
  border-radius: 6px;
}

.page-about .timeline-item:last-child {
  margin-bottom: 0;
}

.page-about .timeline-marker {
  position: absolute;
  left: -24px;
  top: 14px;
  width: 12px;
  height: 12px;
  background: var(--color-terra);
  border-radius: 2px;
  transform: rotate(45deg);
  box-shadow: 0 0 0 3px var(--color-bg), 0 0 0 4px var(--color-terra);
}

.page-about .timeline-card {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: var(--space-5);
  transition: border-color var(--ease), background var(--ease), transform var(--ease);
}

.page-about .timeline-item:hover .timeline-card,
.page-about .timeline-item:focus-within .timeline-card {
  background: #182B44;
  border-color: var(--color-accent);
  transform: translateX(4px);
}

.page-about .timeline-item:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.page-about .timeline-phase {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--color-terra);
  border: 1px solid rgba(217, 154, 108, 0.4);
  border-radius: 4px;
  padding: 2px 8px;
  margin-bottom: var(--space-3);
}

.page-about .timeline-card h3 {
  font-size: 19px;
  font-weight: 800;
  line-height: 1.3;
  margin: 0 0 var(--space-2);
}

.page-about .timeline-card > p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
  margin: 0;
}

.page-about .timeline-detail {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  margin-top: 0;
  color: var(--color-ink);
  transition: max-height 260ms var(--ease-panel), opacity 200ms var(--ease), margin-top 200ms var(--ease);
}

.page-about .timeline-detail::before {
  content: "↳";
  color: var(--color-accent);
  margin-right: 6px;
}

.page-about .timeline-item:hover .timeline-detail,
.page-about .timeline-item:focus-within .timeline-detail {
  max-height: 12em;
  opacity: 1;
  margin-top: var(--space-3);
}

.page-about .timeline-side {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.page-about .timeline-visual {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  max-width: 400px;
}

.page-about .timeline-visual img {
  width: 100%;
  display: block;
}

.page-about .timeline-side-note {
  font-size: 13px;
  line-height: 1.65;
  color: var(--color-muted);
  border-left: 2px solid var(--color-terra);
  padding-left: var(--space-4);
  max-width: 320px;
}

.page-about .tech-section {
  background: linear-gradient(180deg, rgba(22, 40, 62, 0.55) 0%, rgba(10, 26, 47, 0) 100%);
}

.page-about .tech-grid {
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.page-about .tech-card {
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-panel);
  position: relative;
  overflow: hidden;
  transition: border-color var(--ease), background var(--ease);
}

.page-about .tech-card:hover {
  border-color: rgba(255, 107, 0, 0.5);
  background: #182B44;
}

.page-about .tech-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 60px;
  height: 60px;
  background: linear-gradient(225deg, var(--about-accent-dim), transparent 72%);
  pointer-events: none;
}

.page-about .tech-step {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.page-about .tech-card h3 {
  font-size: 19px;
  font-weight: 800;
  line-height: 1.3;
  margin: 0 0 var(--space-3);
}

.page-about .tech-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
  margin: 0;
}

.page-about .cycle-panel {
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-glass);
  padding: var(--space-5);
  display: grid;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.page-about .cycle-row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-3);
}

.page-about .cycle-label {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-muted);
}

.page-about .cycle-track {
  height: 26px;
  border-radius: 4px;
  background: rgba(10, 26, 47, 0.65);
  overflow: hidden;
}

.page-about .cycle-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  height: 100%;
  padding-right: var(--space-3);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
  color: #fff;
  min-width: 76px;
}

.page-about .bar-early {
  width: 100%;
  background: linear-gradient(90deg, #2E4A6A, #406080);
}

.page-about .bar-mid {
  width: 66%;
  background: linear-gradient(90deg, #D99A6C, #D99A6C);
}

.page-about .bar-now {
  width: 33%;
  background: linear-gradient(90deg, #FF6B00, #FF8A3D);
}

.page-about .cycle-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-muted);
  white-space: nowrap;
}

.page-about .cycle-row .tag-success {
  white-space: nowrap;
}

.page-about .tech-diagram {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .tech-diagram text {
  font-family: var(--font-mono);
  font-size: 11px;
  fill: #A6A098;
  letter-spacing: 0.04em;
}

.page-about .pricing-layout {
  display: grid;
  gap: var(--space-6);
}

.page-about .pricing-table {
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  overflow: hidden;
}

.page-about .pricing-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2) var(--space-4);
  align-items: center;
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.page-about .pricing-row:first-child {
  border-top: none;
}

.page-about .pricing-row > span:last-child {
  grid-column: 1 / -1;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.6;
}

.page-about .pricing-head {
  background: var(--color-bg);
}

.page-about .pricing-head > span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
}

.page-about .pricing-row .price {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 800;
  color: var(--color-accent);
  text-align: right;
  white-space: nowrap;
}

.page-about .pricing-note {
  background: var(--color-glass);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
}

.page-about .pricing-note::after {
  content: "";
  position: absolute;
  right: -50px;
  bottom: -50px;
  width: 120px;
  height: 120px;
  border: 1px solid var(--about-accent-dim);
  border-radius: 50%;
  pointer-events: none;
}

.page-about .pricing-note h3 {
  font-size: 19px;
  font-weight: 800;
  margin: 0 0 var(--space-4);
}

.page-about .pricing-note ul {
  list-style: none;
  margin: 0 0 var(--space-5);
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.page-about .pricing-note li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
}

.page-about .pricing-note li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  background: var(--color-terra);
  border-radius: 2px;
  transform: rotate(45deg);
}

.page-about .pricing-note .btn {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.page-about .team-layout {
  display: grid;
  gap: var(--space-6);
}

.page-about .team-copy p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-muted);
  margin: 0 0 var(--space-4);
}

.page-about .team-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-about .team-stat {
  border-left: 2px solid var(--color-accent);
  padding-left: var(--space-3);
}

.page-about .team-stat .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 800;
  color: var(--color-ink);
  line-height: 1.2;
}

.page-about .team-stat .stat-label {
  display: block;
  font-size: 12px;
  line-height: 1.5;
  color: var(--color-muted);
  margin-top: var(--space-1);
}

.page-about .team-visual {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-panel);
}

.page-about .team-visual img {
  width: 100%;
  display: block;
}

.page-about .related-section {
  border-bottom: none;
  padding-bottom: var(--space-8);
}

.page-about .related-panel {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(255, 107, 0, 0.07), transparent 42%), var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  padding: var(--space-6);
}

.page-about .related-panel::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 180px;
  height: 180px;
  border: 1px solid var(--about-accent-dim);
  border-radius: 50%;
  pointer-events: none;
}

.page-about .related-grid {
  display: grid;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.page-about .related-card {
  position: relative;
  display: block;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: var(--space-5);
  text-decoration: none;
  color: var(--color-ink);
  transition: border-color var(--ease), transform var(--ease), background var(--ease);
}

.page-about .related-card:hover,
.page-about .related-card:focus-visible {
  border-color: var(--color-accent);
  background: #101F35;
  transform: translateY(-2px);
  outline: none;
}

.page-about .related-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.page-about .related-title {
  display: block;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  margin-bottom: var(--space-3);
}

.page-about .related-meta {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--color-muted);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 2px 8px;
}

@media (min-width: 768px) {
  .page-about .hero-index {
    grid-template-columns: repeat(5, 1fr);
  }

  .page-about .hero-index a {
    font-size: 13px;
    padding: var(--space-4) var(--space-3);
  }

  .page-about .origin-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
    gap: var(--space-7);
  }

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

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

  .page-about .pricing-layout {
    grid-template-columns: minmax(0, 1fr) 340px;
    align-items: start;
    gap: var(--space-7);
  }

  .page-about .pricing-row {
    grid-template-columns: 110px 130px 1fr;
  }

  .page-about .pricing-row > span:last-child {
    grid-column: auto;
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1fr) 400px;
    align-items: center;
    gap: var(--space-7);
  }

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

  .page-about .origin-section::after,
  .page-about .timeline-section::after,
  .page-about .tech-section::after,
  .page-about .pricing-section::after,
  .page-about .team-section::after,
  .page-about .related-section::after {
    display: block;
  }
}

@media (min-width: 992px) {
  .page-about .timeline-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
    gap: var(--space-7);
  }

  .page-about .pricing-layout {
    grid-template-columns: minmax(0, 1fr) 360px;
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 1fr) 440px;
  }
}