.page-about {
  position: relative;
  background-color: var(--bg-primary);
  background-image:
    radial-gradient(circle at 82% 4%, rgba(0, 180, 255, 0.07), transparent 38%),
    radial-gradient(circle at 8% 68%, rgba(255, 90, 0, 0.04), transparent 32%);
  color: var(--text-high);
  line-height: 1.7;
  overflow-x: hidden;
}
.page-about .about-container {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--shell-gap);
}
.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}
.page-about .breadcrumb {
  margin-top: 24px;
}
.page-about .hero {
  position: relative;
  padding: clamp(32px, 6vw, 88px) 0 clamp(28px, 5vw, 56px);
  border-bottom: 3px solid var(--border);
}
.page-about .hero-grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}
.page-about .hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  font-family: var(--font-data);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--accent-orange);
  text-transform: uppercase;
}
.page-about .hero-kicker::before {
  content: "";
  width: 36px;
  height: 2px;
  background: currentColor;
}
.page-about .hero h1 {
  margin: 0 0 22px;
  max-width: 900px;
  font-size: clamp(2rem, 5.6vw, 4.75rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.01em;
}
.page-about .hero-intro {
  max-width: 620px;
  margin: 0 0 28px;
  font-size: var(--text-md);
  color: var(--text-mid);
}
.page-about .hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .hero-visual {
  position: relative;
  margin: 0 0 14px;
}
.page-about .hero-visual img {
  width: 100%;
  max-height: 520px;
  object-fit: cover;
  border: 3px solid var(--border);
  box-shadow: var(--shadow-lg);
}
.page-about .hero-caption {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 7px 14px;
  background: rgba(11, 14, 20, 0.86);
  border: 2px solid var(--border);
  color: var(--text-mid);
  font-family: var(--font-data);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
}
.page-about .hero-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: clamp(32px, 5vw, 56px);
}
.page-about .metric-card {
  padding: 18px 16px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.page-about .metric-card:hover {
  border-color: var(--accent-blue);
  transform: translateY(-3px);
}
.page-about .metric-value {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-data);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1.1;
  color: var(--accent-blue);
}
.page-about .metric-label {
  font-size: var(--text-sm);
  color: var(--text-low);
}
.page-about .about-chapter {
  position: relative;
  padding: clamp(56px, 8vw, 112px) 0;
  border-top: 2px solid var(--border);
}
.page-about .about-chapter::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(90deg, rgba(0, 180, 255, 0.03), transparent 55%);
}
.page-about .about-chapter-head {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-start;
  gap: clamp(18px, 3vw, 36px);
  margin-bottom: clamp(28px, 4vw, 56px);
}
.page-about .about-chapter-head::after {
  content: "";
  flex: 1;
  height: 3px;
  min-width: 60px;
  margin-top: 22px;
  transform: skewX(-24deg);
  background: linear-gradient(90deg, var(--accent-blue) 0 62%, var(--border) 62% 100%);
}
.page-about .about-chapter-index {
  width: 1.2em;
  flex-shrink: 0;
  font-family: var(--font-data);
  font-size: clamp(3.5rem, 9vw, 7rem);
  font-weight: 700;
  line-height: 0.9;
  color: transparent;
  -webkit-text-stroke: 2px var(--accent-orange);
  opacity: 0.92;
}
.page-about .about-chapter-titles {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-top: 10px;
  min-width: 0;
}
.page-about .about-chapter-titles h2 {
  margin: 0;
  font-size: var(--text-xl);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.01em;
}
.page-about .about-chapter-meta {
  font-family: var(--font-data);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--text-low);
  text-transform: uppercase;
}
.page-about .who-body {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}
.page-about .who-text {
  color: var(--text-mid);
  font-size: var(--text-md);
}
.page-about .who-text .who-lead {
  margin: 0 0 18px;
  font-size: clamp(1.3rem, 2vw, 1.55rem);
  font-weight: 800;
  color: var(--text-high);
  line-height: 1.45;
}
.page-about .who-text p:not(.who-lead) {
  margin: 0 0 16px;
  line-height: 1.8;
}
.page-about .who-text blockquote {
  margin: 28px 0 0;
  padding: 18px 22px;
  border-left: 4px solid var(--accent-orange);
  background: var(--bg-card);
  color: var(--text-mid);
  font-family: var(--font-data);
  font-size: var(--text-sm);
  line-height: 1.6;
}
.page-about .who-side {
  display: flex;
  gap: 18px;
  padding: 20px 18px;
  background: var(--bg-secondary);
  border: 2px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.page-about .vertical-note {
  writing-mode: vertical-rl;
  padding-inline: 8px;
  border-left: 1px solid var(--border);
  font-family: var(--font-data);
  font-size: var(--text-xs);
  letter-spacing: 0.2em;
  color: var(--text-low);
  text-transform: uppercase;
  white-space: nowrap;
}
.page-about .who-stat-list {
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
  display: grid;
  gap: 18px;
  align-content: center;
}
.page-about .who-stat-list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.page-about .who-stat-list strong {
  font-family: var(--font-data);
  font-size: var(--text-xl);
  font-weight: 700;
  line-height: 1;
  color: var(--accent-orange);
}
.page-about .who-stat-list span {
  font-size: var(--text-sm);
  color: var(--text-low);
}
.page-about .timeline-body {
  position: relative;
  z-index: 1;
}
.page-about .timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .timeline-item {
  position: relative;
  padding-left: clamp(24px, 5vw, 56px);
  padding-bottom: clamp(26px, 4vw, 48px);
  border-left: 3px solid var(--border);
}
.page-about .timeline-item:last-child {
  padding-bottom: 0;
}
.page-about .timeline-marker {
  position: absolute;
  left: -10px;
  top: 6px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 4px solid var(--accent-blue);
  box-shadow: 0 0 14px rgba(0, 180, 255, 0.65);
}
.page-about .timeline-card {
  padding: clamp(20px, 3vw, 32px);
  background: var(--bg-card);
  border: 2px solid var(--border);
  box-shadow: var(--shadow-md);
}
.page-about .timeline-year {
  display: inline-block;
  margin-bottom: 16px;
  padding-bottom: 5px;
  border-bottom: 3px solid var(--accent-orange);
  font-family: var(--font-data);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1;
  color: var(--accent-orange);
}
.page-about .timeline-card h3 {
  margin: 0 0 10px;
  font-size: var(--text-lg);
  font-weight: 900;
  line-height: 1.3;
  color: var(--text-high);
}
.page-about .timeline-summary {
  margin: 0 0 14px;
  color: var(--text-mid);
  line-height: 1.7;
}
.page-about .timeline-footnote {
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
  font-family: var(--font-data);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--text-low);
}
.page-about .accordion {
  margin-top: 4px;
  border-top: 1px solid var(--border);
}
.page-about .accordion-head {
  background: var(--bg-secondary);
}
.page-about .accordion-trigger {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 12px 14px;
  border: 0;
  background: transparent;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--accent-blue);
  cursor: pointer;
}
.page-about .accordion-icon {
  position: relative;
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  flex-shrink: 0;
}
.page-about .accordion-icon::before,
.page-about .accordion-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: currentColor;
}
.page-about .accordion-icon::before {
  width: 8px;
  height: 2px;
}
.page-about .accordion-icon::after {
  width: 2px;
  height: 8px;
}
.page-about .accordion-item[data-open] .accordion-icon::after {
  display: none;
}
.page-about .accordion-panel {
  padding: 4px 14px 16px;
  color: var(--text-mid);
  font-size: var(--text-sm);
  line-height: 1.7;
}
.page-about .accordion-panel p {
  margin: 0;
}
.page-about .team-body {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}
.page-about .team-copy {
  display: grid;
  gap: 24px;
}
.page-about .team-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.page-about .team-stat {
  padding: 20px 12px;
  background: var(--bg-card);
  border: 3px solid var(--border);
  text-align: center;
}
.page-about .team-stat strong {
  display: block;
  font-family: var(--font-data);
  font-size: var(--text-xl);
  font-weight: 700;
  line-height: 1.15;
  color: var(--accent-blue);
}
.page-about .team-stat strong small {
  margin-left: 3px;
  font-size: 0.65em;
  color: var(--text-mid);
}
.page-about .team-stat span {
  color: var(--text-low);
  font-size: var(--text-sm);
}
.page-about .team-principles h3 {
  margin: 0 0 12px;
  font-size: var(--text-lg);
  font-weight: 900;
  color: var(--text-high);
}
.page-about .team-principles ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .team-principles li {
  padding: 7px 16px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  font-weight: 700;
  color: var(--text-high);
}
.page-about .team-copy > p {
  margin: 0;
  color: var(--text-mid);
  line-height: 1.8;
}
.page-about .team-figure {
  margin: 0;
  background: var(--bg-card);
  border: 2px solid var(--border);
  box-shadow: var(--shadow-md);
}
.page-about .team-figure img {
  width: 100%;
  border-bottom: 2px solid var(--border);
}
.page-about .team-figure figcaption,
.page-about .tech-figure figcaption {
  padding: 12px 16px;
  font-family: var(--font-data);
  font-size: var(--text-xs);
  color: var(--text-low);
}
.page-about .tech-body {
  position: relative;
  z-index: 1;
}
.page-about .tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
.page-about .tech-card {
  padding: 20px 16px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.page-about .tech-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-blue);
}
.page-about .tech-value {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-data);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1.15;
  color: var(--accent-blue);
}
.page-about .tech-label {
  color: var(--text-low);
  font-size: var(--text-sm);
}
.page-about .tech-figure {
  margin: 28px 0 0;
  background: var(--bg-card);
  border: 2px solid var(--border);
  box-shadow: var(--shadow-md);
}
.page-about .tech-figure img {
  width: 100%;
  border-bottom: 2px solid var(--border);
}
.page-about .promise-body {
  position: relative;
  z-index: 1;
}
.page-about .promise-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}
.page-about .promise-card {
  padding: 24px 20px;
  background: var(--bg-card);
  border: 3px solid var(--border);
  box-shadow: var(--shadow-md);
  transition: transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.page-about .promise-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-orange);
}
.page-about .promise-no {
  font-family: var(--font-data);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent-orange);
}
.page-about .promise-card h3 {
  margin: 12px 0 8px;
  font-size: var(--text-lg);
  font-weight: 900;
  color: var(--text-high);
}
.page-about .promise-card p {
  margin: 0;
  color: var(--text-mid);
  font-size: var(--text-sm);
  line-height: 1.7;
}
.page-about .promise-note {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 28px;
  padding: 16px;
  background: var(--bg-secondary);
  border: 2px dashed var(--border);
}
.page-about .promise-note-mark {
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1;
  color: var(--success);
}
.page-about .promise-note p {
  margin: 0;
  font-family: var(--font-data);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--text-mid);
}
.page-about .next-links {
  padding: clamp(48px, 7vw, 88px) 0 clamp(56px, 8vw, 112px);
  border-top: 2px solid var(--border);
}
.page-about .next-links h2 {
  margin: 0 0 24px;
  font-size: var(--text-xl);
  font-weight: 900;
}
.page-about .next-links-grid {
  display: grid;
  gap: 16px;
}
.page-about .next-link {
  display: grid;
  grid-template-areas:
    "no name"
    "no desc";
  grid-template-columns: auto 1fr;
  gap: 4px 16px;
  align-items: baseline;
  padding: 20px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  text-decoration: none;
  color: var(--text-high);
  transition: transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out);
}
.page-about .next-link:hover {
  transform: translateX(6px);
  border-color: var(--accent-blue);
  background: var(--bg-secondary);
}
.page-about .next-link-no {
  grid-area: no;
  font-family: var(--font-data);
  font-size: var(--text-lg);
  font-weight: 700;
  line-height: 1;
  color: var(--accent-orange);
}
.page-about .next-link-name {
  grid-area: name;
  font-size: var(--text-md);
  font-weight: 800;
}
.page-about .next-link-desc {
  grid-area: desc;
  color: var(--text-mid);
  font-size: var(--text-sm);
}
@media (min-width: 960px) {
  .page-about .hero {
    padding-top: clamp(48px, 7vw, 104px);
  }
  .page-about .hero-grid {
    grid-template-columns: 5fr 7fr;
    align-items: center;
    gap: clamp(32px, 6vw, 72px);
  }
  .page-about .hero-copy {
    padding-right: 12px;
  }
  .page-about .hero-metrics {
    margin-top: clamp(36px, 6vw, 64px);
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
  .page-about .about-chapter {
    padding: clamp(72px, 9vw, 128px) 0;
  }
  .page-about .about-chapter-head {
    gap: 40px;
  }
  .page-about .who-body {
    grid-template-columns: 7fr 5fr;
    align-items: start;
    gap: clamp(32px, 6vw, 80px);
  }
  .page-about .who-side {
    margin-top: 20px;
  }
  .page-about .timeline-list {
    margin-left: clamp(40px, 8vw, 120px);
  }
  .page-about .timeline-item {
    padding-left: clamp(32px, 5vw, 64px);
  }
  .page-about .timeline-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 10px 26px;
  }
  .page-about .timeline-year {
    grid-column: 1;
    grid-row: 1 / 3;
    align-self: start;
    margin-bottom: 0;
  }
  .page-about .timeline-card h3 {
    grid-column: 2;
  }
  .page-about .timeline-summary {
    grid-column: 2;
  }
  .page-about .timeline-card .accordion {
    grid-column: 2;
  }
  .page-about .team-body {
    grid-template-columns: 5fr 7fr;
    align-items: start;
    gap: clamp(32px, 6vw, 72px);
  }
  .page-about .tech-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .page-about .tech-figure {
    margin-top: 32px;
  }
  .page-about .promise-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .page-about .next-links-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
}