.page-about {
  --about-gap: clamp(20px, 3vw, 38px);
  background: var(--ink);
  color: var(--fog);
  font-family: var(--font-body);
  padding-top: calc(var(--header-h) + 16px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .about-hero {
  padding: clamp(20px, 4vw, 52px) 0 clamp(20px, 3vw, 36px);
}

.page-about .about-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: var(--step-display);
  line-height: 0.95;
  letter-spacing: 0.005em;
  color: var(--fog);
  margin: 12px 0 18px;
}

.page-about .about-title-accent {
  color: var(--orange);
}

.page-about .about-hero .lede {
  max-width: 60ch;
  margin: 0;
  color: rgba(233, 241, 236, 0.8);
  font-size: clamp(16px, 1.25vw, 18px);
  line-height: 1.78;
}

.page-about .about-stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-stat {
  background: var(--panel);
  padding: 14px 16px;
}

.page-about .about-stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  font-weight: 500;
  line-height: 1.1;
  color: var(--mint);
}

.page-about .about-stat span {
  display: block;
  margin-top: 4px;
  font-size: var(--step-index);
  letter-spacing: 0.06em;
  color: var(--sage);
}

.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: start;
}

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

.page-about .about-index {
  order: -1;
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 16px;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.page-about .about-index .index-label {
  margin: 0;
}

.page-about .about-seatlist {
  list-style: none;
  display: flex;
  gap: 6px;
  margin: 12px 0 0;
  padding: 0 0 4px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-seatlist li {
  flex: 0 0 auto;
}

.page-about .about-seatlist a {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 8px 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--sage);
  font-size: 13.5px;
  white-space: nowrap;
  text-decoration: none;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-seatlist a:hover,
.page-about .about-seatlist a:focus-visible {
  background: rgba(111, 242, 200, 0.09);
  border-color: var(--line-strong);
  color: var(--fog);
}

.page-about .about-seatno {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--mint);
}

.page-about .about-index-note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--sage);
}

.page-about .about-index-home {
  display: inline-block;
  margin-top: 12px;
  font-size: 13px;
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(111, 242, 200, 0.35);
  padding-bottom: 2px;
}

.page-about .about-index-home:hover,
.page-about .about-index-home:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.page-about .about-chapter {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 3.2vw, 42px);
  border-radius: var(--radius-lg);
  margin-bottom: var(--about-gap);
}

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

.page-about .chapter-num {
  position: absolute;
  top: 2px;
  right: 14px;
  font-family: var(--font-mono);
  font-size: clamp(3.2rem, 8vw, 6rem);
  font-weight: 300;
  line-height: 1;
  color: var(--mint);
  opacity: 0.12;
  pointer-events: none;
}

.page-about .chapter-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 14px;
  margin-bottom: 12px;
}

.page-about .about-chapter h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--step-h2);
  line-height: 1.15;
  color: var(--fog);
  margin: 0 0 14px;
}

.page-about .about-chapter p {
  margin: 0 0 12px;
  max-width: 64ch;
  font-size: var(--step-body);
  line-height: 1.78;
  color: rgba(233, 241, 236, 0.78);
}

.page-about .about-figure {
  margin: 18px 0 20px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--ink);
}

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

.page-about .about-figure figcaption {
  padding: 10px 14px;
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--sage);
  border-top: 1px solid var(--line);
  background: rgba(7, 29, 23, 0.72);
}

.page-about .about-rows {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-about .about-row {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 10px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-row:last-child {
  padding-bottom: 0;
}

.page-about .row-no {
  font-family: var(--font-mono);
  font-size: var(--step-mono);
  line-height: 1.7;
  color: var(--mint);
}

.page-about .about-row h3 {
  margin: 0 0 5px;
  font-size: var(--step-h3);
  font-weight: 500;
  color: var(--fog);
}

.page-about .about-row p {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(233, 241, 236, 0.74);
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--orange), var(--wine) 58%, var(--indigo));
}

.page-about .about-timeline li {
  position: relative;
  padding: 0 0 18px 30px;
}

.page-about .about-timeline li:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 12px;
  height: 12px;
  box-sizing: border-box;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--orange);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.page-about .about-timeline li:hover::before {
  transform: scale(1.3);
  border-color: var(--amber);
}

.page-about .about-version {
  display: inline-block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-about .about-timeline h3 {
  margin: 0 0 3px;
  font-size: var(--step-h3);
  font-weight: 500;
  color: var(--fog);
}

.page-about .about-timeline p {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(233, 241, 236, 0.74);
}

.page-about .about-nextgrid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 18px;
}

.page-about .about-next {
  padding-top: 14px;
  border-top: 1px solid rgba(233, 241, 236, 0.26);
}

.page-about .about-next h3 {
  margin: 0 0 6px;
  font-size: var(--step-h3);
  font-weight: 500;
  color: var(--fog);
}

.page-about .about-next p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(233, 241, 236, 0.76);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

@media (min-width: 680px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-nextgrid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-about .about-shell {
    grid-template-columns: minmax(0, 1fr) 256px;
    gap: clamp(28px, 3.4vw, 52px);
  }

  .page-about .about-index {
    order: 0;
    position: sticky;
    top: calc(var(--header-h) + 16px);
    padding: 20px;
  }

  .page-about .about-seatlist {
    display: grid;
    gap: 4px;
    overflow: visible;
  }

  .page-about .about-seatlist a {
    border-color: transparent;
    white-space: normal;
    font-size: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-seatlist a,
  .page-about .about-timeline li::before {
    transition: none;
  }
}