.page-about {
  --about-skew: -6deg;
  --about-timing: cubic-bezier(0.22, 1, 0.36, 1);
  overflow-x: clip;
  background: var(--bg-main);
  padding-bottom: 48px;
}

.page-about section[id] {
  scroll-margin-top: calc(var(--header-h) + 12px);
}

.page-about .breadcrumb {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 24px 24px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gray);
}

.page-about .breadcrumb a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

.page-about .breadcrumb-cur {
  color: var(--sand);
}

.page-about .about-toc {
  display: none;
}

.page-about .about-hero {
  position: relative;
  padding: 48px 24px 56px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: 24px;
  right: 24px;
  top: 28px;
  height: 8px;
  background: repeating-linear-gradient(90deg, var(--line) 0 2px, transparent 2px 8px);
  opacity: 0.55;
  pointer-events: none;
}

.page-about .hero-grid {
  max-width: var(--grid-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-about .hero-main {
  order: 1;
}

.page-about .hero-rail {
  order: 2;
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 16px;
  align-items: end;
}

.page-about .hero-rail-img {
  width: 100%;
}

.page-about .hero-rail .img-plate {
  transform: rotate(-1.5deg);
  transition: transform var(--about-timing);
}

.page-about .hero-rail .img-plate:hover {
  transform: rotate(0deg);
}

.page-about .rail-note {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.8;
  color: var(--gray);
  border-left: 2px solid var(--accent);
  padding-left: 12px;
}

.page-about .hero-main .entry-tag {
  margin-bottom: 14px;
}

.page-about .hero-main h1 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: clamp(34px, 5vw, 64px);
  font-weight: 700;
  line-height: 1.04;
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-about .lede {
  margin: 0 0 20px;
  max-width: 640px;
  font-family: var(--font-head);
  font-size: clamp(20px, 2.4vw, 30px);
  font-weight: 500;
  line-height: 1.35;
  color: var(--gold);
}

.page-about .hero-main > p:not(.lede) {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--sand);
}

.page-about .stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: 40px;
}

.page-about .stat-card {
  position: relative;
  padding: 28px 20px 20px;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.04) 0%, rgba(255,255,255,0) 60%),
    var(--bg-panel);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  overflow: hidden;
  transition: transform 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
}

.page-about .stat-card::after {
  content: "";
  position: absolute;
  right: -22px;
  bottom: -22px;
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, transparent 46%, rgba(255,107,53,0.4) 50%, transparent 54%);
  opacity: 0;
  transition: opacity 0.25s ease;
}

.page-about .stat-card:hover {
  transform: translateY(-4px) rotate(-0.8deg);
  box-shadow: var(--shadow-panel);
  background:
    linear-gradient(135deg, rgba(255,107,53,0.08) 0%, rgba(255,255,255,0) 60%),
    var(--bg-panel);
}

.page-about .stat-card:hover::after {
  opacity: 1;
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-head);
  font-size: clamp(40px, 5vw, 62px);
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
  letter-spacing: 0.01em;
}

.page-about .stat-card:nth-child(2) .stat-num,
.page-about .stat-card:nth-child(4) .stat-num {
  color: var(--gold);
}

.page-about .stat-label {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gray);
}

.page-about .about-coverage {
  position: relative;
  overflow: hidden;
  padding: 64px 24px;
  background: var(--bg-root);
  border-block: 1px solid var(--line);
}

.page-about .about-coverage::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 120px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--gold));
  z-index: 2;
}

.page-about .coverage-inner {
  position: relative;
  z-index: 1;
  max-width: var(--content-max);
  margin: 0 auto;
}

.page-about .coverage-heat {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  width: 100%;
  height: 100%;
  opacity: 0.13;
  pointer-events: none;
}

.page-about .coverage-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 24px;
}

.page-about .coverage-head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(32px, 4vw, 56px);
  font-weight: 700;
  line-height: 1.05;
  color: var(--paper);
  text-transform: uppercase;
}

.page-about .coverage-head p {
  margin: 0;
  max-width: 48ch;
  color: var(--gray);
  font-size: 14px;
  line-height: 1.8;
}

.page-about .coverage-img {
  margin-bottom: 32px;
  transform: rotate(-0.6deg);
}

.page-about .coverage-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .coverage-card {
  padding: 24px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: transform 0.2s ease, background 0.2s ease;
}

.page-about .coverage-card:hover {
  transform: translateY(-3px);
  background: var(--bg-live);
}

.page-about .coverage-card h3 {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: 20px;
  letter-spacing: 0.03em;
  color: var(--gold);
}

.page-about .coverage-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .coverage-card li {
  position: relative;
  padding-left: 16px;
  color: var(--sand);
  font-size: 14px;
}

.page-about .coverage-card li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
}

.page-about .coverage-note p {
  margin: 0 0 10px;
  color: var(--gray);
  font-size: 13px;
  line-height: 1.8;
}

.page-about .coverage-note p:last-child {
  margin-bottom: 0;
}

.page-about .about-data {
  position: relative;
  padding: 64px 24px;
  background:
    repeating-linear-gradient(-45deg, transparent 0 18px, rgba(255,255,255,0.025) 18px 20px),
    var(--bg-main);
}

.page-about .data-inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

.page-about .about-data h2 {
  margin: 10px 0 16px;
  font-family: var(--font-head);
  font-size: clamp(32px, 4vw, 56px);
  font-weight: 700;
  line-height: 1.05;
  color: var(--paper);
  text-transform: uppercase;
}

.page-about .data-intro {
  margin: 0 0 28px;
  max-width: 58ch;
  color: var(--sand);
  font-size: 15px;
  line-height: 1.9;
}

.page-about .data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 32px;
}

.page-about .data-cell {
  position: relative;
  padding: 32px 24px;
  background: var(--bg-panel);
  border: 1px solid var(--line-strong);
  border-right: 3px solid var(--accent);
}

.page-about .data-num {
  display: block;
  font-family: var(--font-head);
  font-size: clamp(34px, 4vw, 50px);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .data-desc {
  display: block;
  margin-top: 10px;
  color: var(--sand);
  font-size: 14px;
}

.page-about .data-note {
  max-width: 68ch;
  margin: 0 0 0 16px;
  padding-left: 16px;
  border-left: 3px solid var(--gold);
  color: var(--gray);
  font-size: 14px;
  line-height: 1.9;
}

.page-about .about-timeline {
  position: relative;
  padding: 64px 24px;
  background: var(--bg-root);
  border-block: 1px solid var(--line);
}

.page-about .timeline-inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

.page-about .about-timeline h2 {
  margin: 10px 0 24px;
  font-family: var(--font-head);
  font-size: clamp(32px, 4vw, 56px);
  font-weight: 700;
  line-height: 1.05;
  color: var(--paper);
  text-transform: uppercase;
}

.page-about .timeline-bg {
  margin-bottom: 16px;
  position: relative;
}

.page-about .timeline-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7,31,22,0.45) 0%, rgba(7,31,22,0.1) 100%);
  pointer-events: none;
}

.page-about .timeline-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .timeline-item {
  position: relative;
  padding: 24px 20px 20px 24px;
  background: linear-gradient(160deg, rgba(255,255,255,0.05) 0%, transparent 70%), var(--bg-panel);
  border-left: 3px solid var(--accent);
  border-bottom: 1px solid var(--line);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: -3px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--bg-live) 0%, var(--accent) 100%);
}

.page-about .timeline-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-panel);
}

.page-about .timeline-version {
  display: inline-block;
  margin-bottom: 14px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
  background: rgba(255,215,0,0.12);
  border-left: 2px solid var(--gold);
}

.page-about .timeline-item h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 22px;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-about .timeline-item p {
  margin: 0;
  color: var(--gray);
  font-size: 13px;
  line-height: 1.8;
}

.page-about .about-service {
  padding: 64px 24px 16px;
  background: linear-gradient(180deg, var(--bg-root) 0%, var(--bg-main) 85%), var(--bg-main);
}

.page-about .service-inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

.page-about .service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 24px;
}

.page-about .service-main h2 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 700;
  line-height: 1.05;
  color: var(--paper);
  text-transform: uppercase;
}

.page-about .service-main p {
  margin: 0 0 14px;
  max-width: 58ch;
  color: var(--sand);
  font-size: 15px;
  line-height: 1.9;
}

.page-about .service-contact {
  align-self: start;
  padding: 24px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-top: 3px solid var(--gold);
}

.page-about .service-contact h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 18px;
  letter-spacing: 0.03em;
  color: var(--gold);
}

.page-about .service-contact h3 + p {
  margin-bottom: 16px;
}

.page-about .service-contact p {
  margin: 0;
  color: var(--gray);
  font-size: 13px;
  line-height: 1.8;
}

.page-about .about-next {
  max-width: var(--content-max);
  margin: 48px auto 0;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .next-link {
  display: block;
  padding: 20px 16px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--paper);
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.page-about .next-link:hover {
  background: var(--bg-panel);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.page-about .next-link span {
  display: block;
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 600;
}

.page-about .next-link small {
  display: block;
  margin-top: 6px;
  color: var(--gray);
  font-family: var(--font-mono);
  font-size: 12px;
}

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

.page-about .entry-tag {
  display: inline-block;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  border: 1px solid var(--line);
  padding: 4px 10px;
  background: rgba(255,255,255,0.02);
}

@media (min-width: 700px) {
  .page-about .hero-main > p:not(.lede) {
    font-size: 16px;
  }

  .page-about .stat-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }

  .page-about .coverage-head {
    grid-template-columns: 1.15fr 1fr;
    gap: 24px;
    align-items: end;
  }

  .page-about .coverage-grid {
    grid-template-columns: 1fr 1fr;
    gap: 18px;
  }

  .page-about .data-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .data-cell {
    transform: skewX(var(--about-skew));
  }

  .page-about .data-cell > * {
    transform: skewX(calc(var(--about-skew) * -1));
  }

  .page-about .timeline-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-about .service-grid {
    grid-template-columns: 2fr 1fr;
    gap: 48px;
  }

  .page-about .about-next {
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(220px, 320px) 1fr;
    gap: 56px;
    align-items: start;
  }

  .page-about .hero-main {
    order: 2;
  }

  .page-about .hero-rail {
    order: 1;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }

  .page-about .hero-rail-img {
    max-width: 320px;
  }

  .page-about .rail-note {
    max-width: 220px;
  }
}

@media (min-width: 1560px) {
  .page-about .about-toc {
    position: fixed;
    right: 32px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 50;
    display: flex;
    flex-direction: column;
    gap: 0;
    border-left: 1px solid var(--line);
    padding-left: 12px;
  }

  .page-about .about-toc-label {
    display: block;
    margin-bottom: 10px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--gray);
  }

  .page-about .about-toc a {
    position: relative;
    display: block;
    padding: 8px 0;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.06em;
    color: var(--gray);
    text-decoration: none;
    transition: color 0.2s ease, transform 0.2s ease;
  }

  .page-about .about-toc a::before {
    content: "";
    position: absolute;
    left: -13px;
    top: 50%;
    width: 5px;
    height: 5px;
    background: var(--accent);
    transform: scale(0);
    transition: transform 0.2s ease;
  }

  .page-about .about-toc a:hover,
  .page-about .about-toc a.is-active {
    color: var(--accent);
    transform: translateX(4px);
  }

  .page-about .about-toc a.is-active::before {
    transform: scale(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}