.page-about {
  color: var(--ink);
  background: var(--paper);
  overflow-x: hidden;
}

.page-about .about-hero {
  display: grid;
  gap: 32px;
  padding-block: 22px 40px;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(2rem, 7.5vw, 3.5rem);
  line-height: 1.14;
  letter-spacing: -0.02em;
  max-width: 16em;
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--charcoal);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 30px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--fog);
}

.page-about .about-hero__stats dt {
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--charcoal);
  line-height: 1.5;
}

.page-about .about-hero__stats dd {
  margin: 6px 0 0;
  font-family: var(--mono);
  font-size: var(--fs-18);
  font-weight: 600;
  color: var(--red-deep);
}

.page-about .about-hero__art {
  position: relative;
  min-height: 240px;
  border: 1px solid var(--fog);
  border-radius: var(--radius);
  overflow: hidden;
  background:
    radial-gradient(120% 90% at 80% 0%, rgba(200, 16, 46, 0.14), rgba(247, 243, 236, 0) 62%),
    repeating-linear-gradient(90deg, rgba(42, 46, 53, 0.07) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(0deg, rgba(42, 46, 53, 0.07) 0 1px, transparent 1px 40px),
    var(--paper-deep);
}

.page-about .about-hero__art::before {
  content: "";
  position: absolute;
  inset: 18px;
  border: 1px solid rgba(20, 22, 26, 0.14);
}

.page-about .about-hero__rulers {
  position: absolute;
  left: 18px;
  right: 18px;
  top: 50%;
  height: 44px;
  background: repeating-linear-gradient(90deg, var(--charcoal) 0 1px, transparent 1px 18px);
  opacity: 0.34;
}

.page-about .about-hero__rulers::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: var(--red);
  opacity: 0.7;
}

.page-about .about-hero__seal {
  position: absolute;
  right: 24px;
  bottom: 24px;
  width: 72px;
  height: 72px;
  display: grid;
  place-items: center;
  background: var(--red);
  color: var(--paper);
  font-family: var(--serif);
  font-weight: 800;
  font-size: var(--fs-32);
  border-radius: var(--radius);
  box-shadow: 0 8px 20px rgba(122, 12, 30, 0.28);
}

.page-about .about-banner {
  margin: 0 0 8px;
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--fog);
  border-radius: var(--radius);
  object-fit: cover;
}

.page-about .about-body {
  display: grid;
  gap: 36px;
  padding-block: 44px 64px;
}

.page-about .about-toc__title {
  margin: 0;
  font-family: var(--sans);
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--red-deep);
}

.page-about .about-toc__list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-toc__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0 9px 14px;
  border-left: 1px solid var(--fog);
  color: var(--charcoal);
  text-decoration: none;
  font-size: var(--fs-14);
  line-height: 1.5;
  transition: border-color 0.22s var(--ease), color 0.22s var(--ease);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  border-left-color: var(--red);
  color: var(--ink);
}

.page-about .about-toc__index {
  font-family: var(--mono);
  font-size: var(--fs-12);
  color: var(--gold);
}

.page-about .about-content {
  min-width: 0;
}

.page-about .about-section {
  margin-bottom: 68px;
  scroll-margin-top: 96px;
}

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

.page-about .about-section__no {
  display: inline-block;
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  color: var(--red);
  padding-bottom: 6px;
  border-bottom: 2px solid var(--red);
}

.page-about .about-section h2 {
  margin: 14px 0 0;
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(1.5rem, 4.6vw, 2.125rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
  max-width: 20em;
}

.page-about .about-section p {
  margin: 16px 0 0;
  max-width: 38em;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--charcoal);
}

.page-about .about-section a {
  color: var(--red-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-section a:hover,
.page-about .about-section a:focus-visible {
  color: var(--red);
}

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

.page-about .about-readers li {
  position: relative;
  padding-left: 18px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--charcoal);
}

.page-about .about-readers li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 8px;
  height: 2px;
  background: var(--gold);
}

.page-about .about-figure {
  margin: 26px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--fog);
  border-radius: var(--radius);
  object-fit: cover;
}

.page-about .about-figure--narrow img {
  max-width: 560px;
}

.page-about .about-figure__cap {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--charcoal);
}

.page-about .about-timeline {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-timeline__item {
  position: relative;
  padding: 24px 18px 20px;
  border: 1px solid var(--fog);
  border-top: 2px solid var(--ink);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(232, 217, 168, 0.26), rgba(247, 243, 236, 0) 72%);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 18px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 2px var(--paper), 0 0 0 3px var(--gold);
}

.page-about .about-timeline__stage {
  display: inline-block;
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--celadon);
}

.page-about .about-timeline__item h3 {
  margin: 8px 0 0;
  font-family: var(--sans);
  font-weight: 800;
  font-size: var(--fs-16);
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-timeline__item p {
  margin: 10px 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--charcoal);
  max-width: none;
}

.page-about .about-tail {
  margin-top: 22px;
  padding-left: 16px;
  border-left: 2px solid var(--gold-light);
  font-size: var(--fs-14);
  line-height: 1.8;
}

.page-about .about-steps {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .about-step {
  border: 1px solid var(--fog);
  border-left: 3px solid var(--gold-light);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.6);
}

.page-about .about-step[open] {
  border-left-color: var(--celadon);
}

.page-about .about-step summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--sans);
  font-weight: 700;
  font-size: var(--fs-16);
  color: var(--ink);
}

.page-about .about-step summary::-webkit-details-marker {
  display: none;
}

.page-about .about-step summary:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: -2px;
}

.page-about .about-step__num {
  font-size: var(--fs-12);
  color: var(--celadon);
  letter-spacing: 0.1em;
}

.page-about .about-step__body {
  padding: 0 18px 20px 46px;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--charcoal);
}

.page-about .about-scope {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.page-about .about-scope__card {
  padding: 22px 18px;
  border-top: 2px solid var(--red);
  background: var(--paper-deep);
  border-radius: 0 0 var(--radius) var(--radius);
}

.page-about .about-scope__card h3 {
  margin: 0;
  font-family: var(--sans);
  font-weight: 800;
  font-size: var(--fs-16);
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-scope__card p {
  margin: 10px 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--charcoal);
}

.page-about .about-contact {
  display: grid;
  gap: 26px;
  margin-top: 28px;
  padding: 28px 22px;
  background: var(--ink);
  border-top: 2px solid var(--red);
  border-radius: var(--radius);
  color: var(--paper);
}

.page-about .about-contact__list {
  margin: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-contact__row {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(247, 243, 236, 0.14);
}

.page-about .about-contact__row dt {
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--gold-light);
}

.page-about .about-contact__row dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-16);
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-about .about-contact__row dd .mono {
  font-family: var(--mono);
  letter-spacing: 0.02em;
}

.page-about .about-contact__aside p {
  margin: 0;
  max-width: none;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--gold-light);
}

.page-about .about-contact__tips {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-contact__tips li {
  position: relative;
  padding-left: 20px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--paper);
}

.page-about .about-contact__tips li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 10px;
  height: 1px;
  background: var(--red);
}

@media (min-width: 640px) {
  .page-about .about-hero__lead {
    font-size: var(--fs-18);
  }

  .page-about .about-hero__art {
    min-height: 300px;
  }

  .page-about .about-contact {
    padding: 32px 28px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: center;
    gap: 48px;
    padding-block: 32px 52px;
  }

  .page-about .about-hero__art {
    min-height: 380px;
  }

  .page-about .about-timeline {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-scope {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-contact {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 36px;
    padding: 38px 34px;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 224px minmax(0, 1fr);
    gap: 64px;
    padding-block: 56px 80px;
  }

  .page-about .about-toc {
    position: sticky;
    top: 96px;
  }

  .page-about .about-toc__list {
    margin-top: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc__link {
    transition: none;
  }
}