.page-about {
  --about-acid: var(--acid-green);
  --about-blue: var(--electric-blue);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px 80px;
  color: var(--site-text);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 18px 0;
  margin-bottom: 16px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--site-muted);
  border-bottom: 1px solid var(--site-line);
}

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

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

.page-about .about-hero {
  position: relative;
  padding: 48px 0 64px;
  border-bottom: 1px solid var(--site-line);
}

.page-about .about-hero::before {
  content: '';
  position: absolute;
  right: -40px;
  top: 0;
  width: 38%;
  height: 100%;
  background: linear-gradient(135deg, transparent 0%, rgba(0, 229, 255, 0.06) 100%);
  clip-path: polygon(100% 0, 100% 100%, 18% 100%);
  pointer-events: none;
}

.page-about .hero-grid {
  display: grid;
  gap: 40px;
  position: relative;
  z-index: 1;
}

.page-about .hero-kicker {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--about-acid);
  padding: 6px 12px;
  border: 1px solid rgba(198, 255, 0, 0.3);
  border-radius: 2px;
  margin-bottom: 20px;
}

.page-about .hero-copy h1 {
  font-family: var(--font-head);
  font-size: clamp(36px, 6.5vw, 68px);
  line-height: 1.03;
  margin: 0 0 16px;
  letter-spacing: -0.02em;
  color: var(--site-text);
}

.page-about .hero-h1-sub {
  font-size: 0.52em;
  display: block;
  color: var(--site-muted);
  letter-spacing: 0.02em;
  margin-top: 8px;
  font-family: var(--font-body);
  font-weight: 500;
}

.page-about .hero-description {
  font-size: 16px;
  color: var(--site-muted);
  margin-bottom: 16px;
  letter-spacing: 0.06em;
}

.page-about .hero-lead {
  font-size: 16px;
  line-height: 1.75;
  color: var(--site-muted);
  max-width: 560px;
  margin: 0 0 32px;
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .hero-stat {
  padding: 16px 20px;
  background: var(--site-bg-alt);
  border: 1px solid var(--site-line);
  border-radius: 4px;
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition-speed) var(--ease-out);
}

.page-about .hero-stat:hover {
  border-color: rgba(198, 255, 0, 0.35);
}

.page-about .hero-stat::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--about-acid);
}

.page-about .hero-stat .metric-number {
  font-family: var(--font-num);
  font-size: 32px;
  font-weight: 700;
  color: var(--about-acid);
  display: block;
  line-height: 1;
}

.page-about .hero-stat .metric-label {
  font-size: 12px;
  color: var(--site-muted);
  margin-top: 6px;
  display: block;
  letter-spacing: 0.06em;
}

.page-about .hero-aside {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
  border-left: 1px solid var(--site-line);
  padding-left: 24px;
  position: relative;
}

.page-about .hero-aside-vert {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-head);
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--about-blue);
  text-transform: uppercase;
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  opacity: 0.7;
}

.page-about .hero-aside-note {
  font-size: 14px;
  line-height: 1.7;
  color: var(--site-muted);
  max-width: 240px;
}

.page-about .hero-aside-rule {
  width: 56px;
  height: 3px;
  background: var(--about-blue);
  clip-path: polygon(0 0, 100% 0, 85% 100%, 0 100%);
}

.page-about .about-section {
  position: relative;
  padding: 52px 0 60px;
  border-bottom: 1px solid var(--site-line);
}

.page-about .about-section::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 72px;
  height: 1px;
  background: var(--about-acid);
}

.page-about .section-heading {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 32px;
}

.page-about .section-heading .section-index {
  font-family: var(--font-num);
  font-size: 13px;
  color: var(--site-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-about .section-heading h2 {
  font-family: var(--font-head);
  font-size: clamp(24px, 3.2vw, 38px);
  margin: 0;
  color: var(--site-text);
  letter-spacing: -0.01em;
}

.page-about .position-layout {
  display: grid;
  gap: 36px;
}

.page-about .position-copy p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--site-muted);
  margin-bottom: 24px;
}

.page-about .position-points {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .position-points li {
  padding: 16px 20px;
  background: var(--site-bg-alt);
  border-left: 3px solid var(--about-blue);
  font-size: 14px;
  line-height: 1.7;
  color: var(--site-text);
  transition: border-color var(--transition-speed) var(--ease-out), transform var(--transition-speed) var(--ease-out);
}

.page-about .position-points li:hover {
  border-color: var(--about-acid);
  transform: translateX(4px);
}

.page-about .position-points strong {
  color: var(--about-acid);
  font-weight: 600;
}

.page-about .position-figure,
.page-about .version-figure,
.page-about .team-figure {
  margin: 0;
}

.page-about .position-figure img,
.page-about .version-figure img,
.page-about .team-figure img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-about .position-figure figcaption,
.page-about .version-figure figcaption,
.page-about .team-figure figcaption {
  font-size: 12px;
  color: var(--site-muted);
  padding: 10px 0;
  border-bottom: 1px solid var(--site-line);
  letter-spacing: 0.04em;
}

.page-about .coverage-layout {
  display: grid;
  gap: 36px;
}

.page-about .coverage-intro {
  font-size: 16px;
  line-height: 1.75;
  color: var(--site-muted);
  max-width: 680px;
  margin-bottom: 24px;
}

.page-about .stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .coverage-stat {
  padding: 24px 28px;
  position: relative;
  overflow: hidden;
}

.page-about .coverage-stat::after {
  content: '';
  position: absolute;
  right: -20px;
  top: -20px;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, transparent 0%, rgba(0, 229, 255, 0.08) 100%);
  clip-path: polygon(100% 0, 0 100%, 100% 100%);
}

.page-about .coverage-stat .metric-number {
  font-family: var(--font-num);
  font-size: 48px;
  color: var(--about-acid);
  display: block;
  line-height: 1;
  margin-bottom: 8px;
}

.page-about .coverage-stat .metric-label {
  font-size: 13px;
  color: var(--site-muted);
  letter-spacing: 0.04em;
}

.page-about .coverage-side {
  background: var(--site-bg-alt);
  border: 1px solid var(--site-line);
  padding: 24px;
}

.page-about .coverage-side ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 4px;
}

.page-about .coverage-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--site-muted);
  padding: 12px 0;
  border-bottom: 1px solid var(--site-line);
}

.page-about .coverage-list li:last-child {
  border-bottom: none;
}

.page-about .coverage-list li span:last-child {
  line-height: 1.5;
}

.page-about .rhythm-layout {
  display: grid;
  gap: 32px;
}

.page-about .rhythm-timeline {
  display: grid;
  gap: 0;
}

.page-about .rhythm-node {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 16px;
  padding: 20px 0;
  padding-left: 24px;
  border-left: 2px solid var(--site-line);
  position: relative;
}

.page-about .rhythm-node::before {
  content: '';
  position: absolute;
  left: -7px;
  top: 28px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--about-acid);
  border: 2px solid var(--site-bg);
}

.page-about .rhythm-time {
  font-family: var(--font-num);
  font-size: 20px;
  font-weight: 700;
  color: var(--about-blue);
  line-height: 1.2;
}

.page-about .rhythm-content h3 {
  font-size: 18px;
  margin: 0 0 6px;
  color: var(--site-text);
  font-family: var(--font-head);
}

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

.page-about .rhythm-aside {
  padding: 24px;
  background: var(--site-bg-alt);
  border: 1px solid var(--site-line);
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
}

.page-about .rhythm-aside::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--about-acid), var(--about-blue));
}

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

.page-about .rhythm-link {
  color: var(--about-acid);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--transition-speed) var(--ease-out);
}

.page-about .rhythm-link:hover {
  gap: 10px;
}

.page-about .version-layout {
  display: grid;
  gap: 36px;
}

.page-about .version-timeline {
  position: relative;
  display: grid;
  gap: 0;
}

.page-about .version-node {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 16px;
  padding: 16px 0;
  position: relative;
}

.page-about .version-node::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 18px;
  bottom: -18px;
  width: 2px;
  background: var(--site-line);
}

.page-about .version-node:last-child::before {
  display: none;
}

.page-about .version-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--site-bg);
  border: 3px solid var(--site-muted);
  position: relative;
  z-index: 1;
  margin-top: 4px;
  transition: border-color var(--transition-speed) var(--ease-out), box-shadow var(--transition-speed) var(--ease-out);
}

.page-about .version-node.is-current .version-dot {
  border-color: var(--about-acid);
  box-shadow: 0 0 0 5px rgba(198, 255, 0, 0.15);
}

.page-about .version-node:hover .version-dot {
  border-color: var(--about-blue);
  box-shadow: 0 0 0 5px rgba(0, 229, 255, 0.12);
}

.page-about .version-card {
  padding: 20px 24px;
  background: var(--site-card);
  border: 1px solid var(--site-line);
  border-radius: 4px;
  transition: border-color var(--transition-speed) var(--ease-out), transform var(--transition-speed) var(--ease-out), background var(--transition-speed) var(--ease-out);
}

.page-about .version-card:hover {
  border-color: rgba(198, 255, 0, 0.35);
  background: linear-gradient(135deg, rgba(198, 255, 0, 0.05), transparent 60%);
  transform: translateX(4px);
}

.page-about .version-name {
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 700;
  color: var(--about-acid);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 8px;
}

.page-about .version-card h3 {
  font-size: 20px;
  margin: 0 0 8px;
  color: var(--site-text);
  font-family: var(--font-head);
}

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

.page-about .team-layout {
  display: grid;
  gap: 36px;
}

.page-about .team-copy > p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--site-muted);
  margin-bottom: 24px;
}

.page-about .expandable-group {
  display: grid;
  gap: 12px;
  margin-bottom: 28px;
}

.page-about .expandable-item {
  background: var(--site-bg-alt);
  border: 1px solid var(--site-line);
  border-radius: 4px;
  overflow: hidden;
  transition: border-color var(--transition-speed) var(--ease-out);
}

.page-about .expandable-item:hover {
  border-color: rgba(0, 229, 255, 0.3);
}

.page-about .expandable-toggle {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  background: none;
  border: none;
  color: var(--site-text);
  font-size: 15px;
  font-family: var(--font-body);
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  letter-spacing: 0.02em;
}

.page-about .expandable-icon {
  font-size: 22px;
  font-weight: 400;
  color: var(--about-blue);
  line-height: 1;
  transition: transform var(--transition-speed) var(--ease-out), color var(--transition-speed) var(--ease-out);
}

.page-about .expandable-toggle:hover .expandable-icon {
  color: var(--about-acid);
}

.page-about .expandable-toggle[aria-expanded="true"] .expandable-icon {
  transform: rotate(45deg);
}

.page-about .expandable-panel {
  padding: 0 20px 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--site-muted);
  border-top: 1px solid transparent;
}

.page-about .expandable-panel p {
  margin: 0;
}

.page-about .team-copy .btn-primary {
  margin-top: 4px;
}

.page-about .about-foot {
  padding: 48px 0 0;
}

.page-about .about-foot-rule {
  height: 4px;
  background: linear-gradient(90deg, var(--about-acid), var(--about-blue));
  clip-path: polygon(0 0, 100% 0, 98% 100%, 2% 100%);
  margin-bottom: 36px;
}

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

.page-about .about-foot-title {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-foot-title .section-index {
  font-family: var(--font-num);
  font-size: 13px;
  color: var(--site-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-about .about-foot-title p {
  font-size: 20px;
  font-weight: 700;
  margin: 0;
  font-family: var(--font-head);
}

.page-about .about-foot-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .foot-link {
  display: inline-block;
  padding: 10px 20px;
  background: var(--site-bg-alt);
  border: 1px solid var(--site-line);
  color: var(--site-muted);
  text-decoration: none;
  font-size: 14px;
  border-radius: 2px;
  transition: all var(--transition-speed) var(--ease-out);
}

.page-about .foot-link:hover {
  border-color: var(--about-blue);
  color: var(--about-blue);
  transform: translateY(-2px);
}

@media (min-width: 768px) {
  .page-about {
    padding: 0 40px 100px;
  }

  .page-about .breadcrumb {
    padding: 20px 0;
    font-size: 14px;
  }

  .page-about .hero-grid {
    grid-template-columns: 2fr 1fr;
    align-items: end;
    gap: 48px;
  }

  .page-about .hero-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    max-width: 620px;
  }

  .page-about .hero-stat .metric-number {
    font-size: 36px;
  }

  .page-about .hero-aside {
    padding-left: 32px;
  }

  .page-about .hero-aside-vert {
    right: 16px;
  }

  .page-about .about-section {
    padding: 64px 0 76px;
  }

  .page-about .section-heading {
    flex-direction: row;
    align-items: baseline;
    gap: 20px;
    margin-bottom: 40px;
  }

  .page-about .section-heading h2 {
    font-size: 40px;
  }

  .page-about .position-layout {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 56px;
    align-items: center;
  }

  .page-about .position-points li {
    padding: 18px 24px;
  }

  .page-about .coverage-layout {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .stats-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .page-about .coverage-stat {
    padding: 28px 24px;
  }

  .page-about .coverage-stat .metric-number {
    font-size: 56px;
  }

  .page-about .rhythm-layout {
    grid-template-columns: 1.6fr 0.9fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .rhythm-node {
    grid-template-columns: 88px 1fr;
    padding-left: 32px;
  }

  .page-about .rhythm-aside {
    padding: 32px;
  }

  .page-about .version-layout {
    grid-template-columns: 0.9fr 1.1fr;
    gap: 56px;
    align-items: center;
  }

  .page-about .version-figure {
    order: 1;
  }

  .page-about .version-timeline {
    order: 2;
  }

  .page-about .version-card {
    padding: 24px 28px;
  }

  .page-about .team-layout {
    grid-template-columns: 0.95fr 1.05fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .about-foot {
    padding: 56px 0 0;
  }

  .page-about .about-foot-inner {
    grid-template-columns: 1fr 2fr;
    align-items: center;
    gap: 48px;
  }
}