.page-about {
  font-family: var(--font);
  color: var(--ink);
  line-height: 1.8;
  max-width: calc(var(--container-w) + 48px);
  margin: 0 auto;
  padding: 0 20px;
}
.page-about .crumb {
  padding: 16px 0 0;
  font-size: 13px;
}
.page-about .crumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.page-about .crumb-list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--gray);
}
.page-about .crumb-list a {
  color: var(--gray);
  text-decoration: none;
  transition: color var(--speed) var(--ease);
}
.page-about .crumb-list a:hover {
  color: var(--blue);
}
.page-about .about-hero {
  position: relative;
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--border);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -20px;
  width: 6px;
  background: var(--orange);
  transform: skewX(-12deg);
}
.page-about .hero-kicker {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 12px;
}
.page-about .hero-title {
  font-size: 34px;
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}
.page-about .hero-kw {
  display: block;
  color: var(--orange);
  margin-top: 4px;
}
.page-about .hero-meta {
  font-size: 16px;
  color: var(--ink);
  max-width: 680px;
  margin-bottom: 24px;
}
.page-about .hero-preview {
  border-top: 1px solid var(--border);
  margin-top: 28px;
}
.page-about .preview-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .preview-item {
  display: grid;
  grid-template-columns: 40px 1fr auto;
  grid-template-areas:
    "idx name arr"
    "idx meta arr";
  gap: 2px 14px;
  padding: 16px 4px;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: var(--ink);
  align-items: center;
  transition: background var(--speed) var(--ease), padding-left var(--speed) var(--ease);
}
.page-about .preview-item:hover {
  background: rgba(217, 208, 184, 0.3);
  padding-left: 12px;
}
.page-about .preview-index {
  grid-area: idx;
  font-family: var(--mono);
  font-weight: 800;
  color: var(--orange);
  font-size: 18px;
}
.page-about .preview-name {
  grid-area: name;
  font-weight: 800;
  font-size: 17px;
}
.page-about .preview-meta {
  grid-area: meta;
  font-size: 13px;
  color: var(--gray);
}
.page-about .preview-arrow {
  grid-area: arr;
  font-size: 18px;
  color: var(--blue);
  transition: transform var(--speed) var(--ease);
}
.page-about .preview-item:hover .preview-arrow {
  transform: translateX(6px);
}
.page-about .about-section {
  padding-top: 48px;
}
.page-about .section-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}
.page-about .section-index {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 900;
  line-height: 1;
  color: var(--cream);
  background: var(--orange);
  padding: 5px 12px 4px 14px;
  display: inline-block;
  transform: skewX(-10deg);
  flex: 0 0 auto;
}
.page-about .section-title {
  font-size: 30px;
  font-weight: 900;
  line-height: 1.2;
  margin: 0;
  letter-spacing: -0.01em;
}
.page-about .section-desc {
  font-size: 16px;
  color: var(--ink);
  max-width: 760px;
  margin: 0 0 24px;
}
.page-about .media-frame {
  position: relative;
  overflow: hidden;
  background: var(--khaki);
  margin: 0;
}
.page-about .media-frame[data-ratio="4/3"] {
  aspect-ratio: 4 / 3;
}
.page-about .media-frame[data-ratio="14/5"] {
  aspect-ratio: 14 / 5;
}
.page-about .media-frame img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  display: block;
}
.page-about .origin-grid {
  display: grid;
  gap: 24px;
}
.page-about .origin-copy p {
  margin: 0 0 14px;
}
.page-about .origin-lead {
  font-size: 18px;
  font-weight: 800;
  line-height: 1.7;
}
.page-about .origin-quote {
  position: relative;
  margin: 20px 0;
  padding: 16px 20px 16px 48px;
  background: var(--khaki);
  border-left: 6px solid var(--blue);
}
.page-about .origin-quote::before {
  content: "“";
  position: absolute;
  left: 12px;
  top: 4px;
  font-size: 48px;
  color: var(--blue);
  opacity: 0.35;
  line-height: 1.3;
}
.page-about .origin-quote p {
  font-size: 20px;
  font-weight: 900;
  line-height: 1.5;
  margin: 0 0 6px;
}
.page-about .origin-quote cite {
  font-style: normal;
  font-size: 13px;
  color: var(--gray);
}
.page-about .timeline-frame {
  margin-bottom: 32px;
}
.page-about .timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}
.page-about .timeline-list::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--khaki);
}
.page-about .timeline-item {
  position: relative;
  padding: 0 0 28px 34px;
}
.page-about .timeline-item:last-child {
  padding-bottom: 0;
}
.page-about .timeline-dot {
  position: absolute;
  left: 0;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 3px var(--cream), 0 0 0 4px var(--blue);
  transition: background var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}
.page-about .timeline-item:hover .timeline-dot {
  background: var(--orange);
  box-shadow: 0 0 0 3px var(--cream), 0 0 0 4px var(--orange);
}
.page-about .timeline-card {
  border: 1px solid var(--border);
  background: var(--cream);
  padding: 16px 18px;
  transition: border-color var(--speed) var(--ease), transform var(--speed) var(--ease), box-shadow var(--speed) var(--ease);
}
.page-about .timeline-item:hover .timeline-card {
  border-color: var(--green);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(28, 28, 26, 0.08);
}
.page-about .timeline-year {
  display: inline-block;
  font-family: var(--mono);
  font-weight: 900;
  font-size: 15px;
  color: var(--cream);
  background: var(--blue);
  padding: 2px 8px;
  transform: skewX(-8deg);
  margin-bottom: 10px;
}
.page-about .timeline-card h3 {
  margin: 0 0 6px;
  font-size: 20px;
  font-weight: 900;
}
.page-about .timeline-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}
.page-about .timeline-note {
  margin: 16px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  font-size: 15px;
  color: var(--gray);
}
.page-about .scale-band {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin: 24px 0 32px;
}
.page-about .scale-item {
  background: var(--blue);
  color: var(--cream);
  padding: 18px 12px;
  text-align: center;
  border-left: 4px solid var(--green);
}
.page-about .scale-num {
  display: block;
  font-family: var(--mono);
  font-size: 30px;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.page-about .scale-label {
  display: block;
  font-size: 13px;
  line-height: 1.4;
  margin-top: 8px;
  opacity: 0.85;
}
.page-about .scale-grid {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}
.page-about .scale-card {
  border: 1px solid var(--border);
  background: var(--cream);
  padding: 22px;
  transition: border-color var(--speed) var(--ease), transform var(--speed) var(--ease);
}
.page-about .scale-card:hover {
  border-color: var(--green);
  transform: translateY(-2px);
}
.page-about .scale-tag {
  display: inline-block;
  background: var(--khaki);
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 800;
  transform: skewX(-8deg);
  margin-bottom: 10px;
}
.page-about .scale-card h3 {
  font-size: 18px;
  font-weight: 900;
  margin: 0 0 8px;
}
.page-about .scale-card p {
  font-size: 15px;
  color: var(--gray);
  line-height: 1.7;
  margin: 0;
}
.page-about .compare-grid {
  display: grid;
  gap: 20px;
  margin-bottom: 28px;
}
.page-about .compare-table-wrap {
  overflow-x: auto;
}
.page-about .compare-table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.6;
}
.page-about .compare-table caption {
  background: var(--khaki);
  font-weight: 800;
  padding: 10px 14px;
  text-align: left;
  border: 1px solid var(--border);
  border-bottom: 0;
}
.page-about .compare-table th {
  background: var(--ink);
  color: var(--cream);
  text-align: left;
  padding: 10px 14px;
  font-weight: 700;
}
.page-about .compare-table td {
  border: 1px solid var(--border);
  padding: 12px 14px;
  vertical-align: top;
}
.page-about .compare-table td:first-child {
  font-weight: 700;
}
.page-about .compare-table tr:nth-child(even) td {
  background: rgba(217, 208, 184, 0.22);
}
.page-about .radar-wrap {
  border: 1px solid var(--border);
  background: var(--cream);
  padding: 18px;
}
.page-about .radar-title {
  margin: 0 0 4px;
  font-size: 18px;
  font-weight: 900;
}
.page-about .radar-sub {
  margin: 0 0 12px;
  font-size: 13px;
  color: var(--gray);
}
.page-about .radar-chart {
  width: 100%;
  height: auto;
  display: block;
}
.page-about .radar-chart .radar-grid-line {
  fill: none;
  stroke: var(--khaki);
  stroke-width: 1;
}
.page-about .radar-chart .radar-data-poly {
  fill: rgba(0, 65, 115, 0.18);
  stroke: var(--blue);
  stroke-width: 2;
  stroke-linejoin: round;
}
.page-about .radar-chart .radar-axis-line {
  stroke: rgba(28, 28, 26, 0.22);
  stroke-width: 1;
  transition: stroke var(--speed) var(--ease), stroke-width var(--speed) var(--ease);
}
.page-about .radar-chart .radar-node {
  fill: var(--blue);
  stroke: var(--cream);
  stroke-width: 2;
  transition: fill var(--speed) var(--ease);
}
.page-about .radar-chart .radar-dim-text {
  font-size: 12px;
  font-weight: 700;
  fill: var(--gray);
  letter-spacing: 0.02em;
  transition: fill var(--speed) var(--ease);
}
.page-about .radar-chart .radar-axis:hover .radar-axis-line {
  stroke: var(--orange);
  stroke-width: 2;
}
.page-about .radar-chart .radar-axis:hover .radar-node {
  fill: var(--orange);
}
.page-about .radar-chart .radar-axis:hover .radar-dim-text {
  fill: var(--ink);
}
.page-about .radar-legend {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px 16px;
}
.page-about .radar-legend li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px dashed var(--khaki);
  padding: 4px 0;
  font-size: 13px;
}
.page-about .radar-legend strong {
  font-family: var(--mono);
  font-size: 16px;
  color: var(--blue);
}
.page-about .compare-media {
  max-width: 680px;
  margin: 28px auto 0;
}
.page-about .about-cta {
  background: var(--ink);
  color: var(--cream);
  margin-top: 48px;
  margin-bottom: 40px;
  padding: 32px 22px;
  position: relative;
  overflow: hidden;
}
.page-about .about-cta .section-head {
  position: relative;
  z-index: 1;
}
.page-about .about-cta .section-title {
  color: var(--cream);
}
.page-about .about-cta .section-index {
  background: var(--green);
  color: var(--ink);
}
.page-about .about-cta .section-desc {
  color: rgba(245, 240, 230, 0.8);
  position: relative;
  z-index: 1;
}
.page-about .cta-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
  position: relative;
  z-index: 1;
}
.page-about .cta-links a {
  text-decoration: none;
  font-weight: 700;
  font-size: 14px;
  padding: 12px 18px;
  text-align: center;
  border: 1px solid transparent;
  transition: transform var(--speed) var(--ease), background var(--speed) var(--ease), color var(--speed) var(--ease), border-color var(--speed) var(--ease);
}
.page-about .cta-links .btn-primary {
  background: var(--green);
  color: var(--ink);
}
.page-about .cta-links .btn-primary:hover {
  background: var(--cream);
  transform: translateX(4px);
}
.page-about .cta-links .btn-ghost {
  border-color: rgba(245, 240, 230, 0.42);
  color: var(--cream);
}
.page-about .cta-links .btn-ghost:hover {
  border-color: var(--green);
  color: var(--green);
  transform: translateX(4px);
}
.page-about .cta-note {
  margin: 20px 0 0;
  font-size: 13px;
  color: rgba(245, 240, 230, 0.6);
  position: relative;
  z-index: 1;
}

@media (min-width: 760px) {
  .page-about .scale-band {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .cta-links {
    flex-direction: row;
    flex-wrap: wrap;
  }
  .page-about .cta-links a {
    min-width: 180px;
  }
}

@media (min-width: 1024px) {
  .page-about {
    padding: 0 32px;
  }
  .page-about .about-hero {
    padding: 72px 0 56px;
  }
  .page-about .hero-title {
    font-size: 52px;
  }
  .page-about .hero-preview {
    margin-top: 40px;
  }
  .page-about .preview-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    column-gap: 32px;
  }
  .page-about .about-section {
    padding-top: 72px;
  }
  .page-about .section-title {
    font-size: 38px;
  }
  .page-about .section-index {
    font-size: 26px;
  }
  .page-about .origin-grid {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 44px;
  }
  .page-about .origin-quote {
    margin: 24px 0;
  }
  .page-about .timeline-list {
    display: flex;
    gap: 24px;
    margin-top: 48px;
  }
  .page-about .timeline-list::before {
    top: 7px;
    bottom: auto;
    left: 0;
    right: 0;
    width: auto;
    height: 2px;
  }
  .page-about .timeline-item {
    flex: 1;
    padding: 34px 0 0 0;
  }
  .page-about .timeline-item:last-child {
    padding-bottom: 0;
  }
  .page-about .timeline-dot {
    top: 0;
    left: 0;
  }
  .page-about .timeline-card {
    height: 100%;
  }
  .page-about .timeline-note {
    margin-top: 24px;
  }
  .page-about .scale-band {
    grid-template-columns: repeat(6, 1fr);
  }
  .page-about .scale-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
  .page-about .compare-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 28px;
  }
  .page-about .compare-table td:first-child {
    white-space: nowrap;
    width: 38%;
  }
  .page-about .compare-media {
    margin-top: 12px;
  }
  .page-about .about-cta {
    padding: 56px 48px;
    margin-top: 72px;
  }
  .page-about .cta-links a {
    min-width: 200px;
  }
}