.page-about {
  --abt-gap: clamp(20px, 4vw, 40px);
  display: block;
}

.page-about .abt-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 5vw, 60px) 0 clamp(30px, 5vw, 56px);
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(130% 100% at 88% -10%, rgba(92, 255, 200, 0.13), transparent 58%),
    linear-gradient(180deg, var(--ink-800), var(--ink-900));
}

.page-about .abt-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(44, 107, 81, 0.28) 0 1px, transparent 1px 72px);
  opacity: 0.5;
  pointer-events: none;
}

.page-about .abt-hero__inner {
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .abt-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-cn);
  font-weight: 900;
  font-size: clamp(32px, 7.6vw, 68px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--white);
  max-width: 18ch;
}

.page-about .abt-hero__lead {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--body-text);
}

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

.page-about .abt-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .abt-fact {
  padding: 14px 16px;
  background: var(--ink-700);
}

.page-about .abt-fact dt {
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-about .abt-fact dd {
  margin: 6px 0 0;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .abt-fact .stat-num {
  font-family: var(--font-display);
  font-size: clamp(30px, 6vw, 42px);
  line-height: 1;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .abt-fact__unit {
  font-size: 12px;
  color: var(--body-text);
}

.page-about .abt-sec {
  padding: clamp(34px, 6vw, 72px) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .abt-sec--last {
  border-bottom: 0;
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .abt-sec__head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(22px, 4vw, 40px);
}

.page-about .abt-num {
  font-family: var(--font-display);
  font-size: clamp(48px, 13vw, 96px);
  line-height: 0.82;
  letter-spacing: 0.02em;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--line);
  font-variant-numeric: tabular-nums;
}

.page-about .abt-h2 {
  margin: 0;
  font-family: var(--font-cn);
  font-weight: 800;
  font-size: clamp(22px, 4.6vw, 36px);
  line-height: 1.24;
  color: var(--white);
  max-width: 24ch;
}

.page-about .abt-lede {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--body-text);
}

.page-about .abt-figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--ink-700);
}

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

.page-about .abt-figure .media__caption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line-soft);
}

.page-about .abt-origin {
  align-items: start;
}

.page-about .abt-origin__text p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--body-text);
}

.page-about .abt-origin__text p:last-child {
  margin-bottom: 0;
}

.page-about .abt-origin__text a {
  color: var(--neon-mist);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .abt-timeline {
  list-style: none;
  margin: 0 0 clamp(24px, 4vw, 40px);
  padding: 0 0 0 18px;
  position: relative;
  display: grid;
  gap: 10px;
}

.page-about .abt-timeline::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--neon), var(--line) 55%, transparent);
  opacity: 0.6;
}

.page-about .abt-tl {
  position: relative;
}

.page-about .abt-tl::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 22px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 3px rgba(92, 255, 200, 0.16);
}

.page-about .abt-tl__box {
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-about .abt-tl__box[open] {
  border-color: var(--neon);
  background: var(--ink-800);
}

.page-about .abt-tl__box summary {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px 14px;
  padding: 12px 14px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .abt-tl__year {
  font-family: var(--font-display);
  font-size: 26px;
  line-height: 1;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .abt-tl__title {
  flex: 1 1 160px;
  font-family: var(--font-cn);
  font-weight: 700;
  font-size: 15px;
  color: var(--white);
}

.page-about .abt-tl__cue {
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .abt-tl__box[open] .abt-tl__cue {
  color: var(--muted);
}

.page-about .abt-tl__body {
  margin: 0;
  padding: 0 14px 14px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--body-text);
  border-top: 1px dashed var(--line-soft);
  padding-top: 10px;
}

.page-about .abt-flow {
  display: block;
  width: 100%;
  height: 48px;
  margin-bottom: 14px;
}

.page-about .abt-flow path {
  fill: none;
  stroke: var(--line);
  stroke-width: 2;
  stroke-dasharray: 7 7;
  vector-effect: non-scaling-stroke;
}

.page-about .abt-flow circle {
  fill: var(--neon);
}

.page-about .abt-layer {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .abt-layer .tag {
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-about .abt-layer__title {
  margin: 0;
  font-family: var(--font-cn);
  font-weight: 800;
  font-size: 17px;
  color: var(--white);
}

.page-about .abt-layer p:last-child {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--body-text);
}

.page-about .abt-shift {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-left: 2px solid var(--line);
  transition: border-color 200ms var(--ease), transform 200ms var(--ease);
}

.page-about .abt-shift:hover,
.page-about .abt-shift:focus-within {
  border-left-color: var(--neon);
  transform: translateY(-2px);
}

.page-about .abt-shift__name {
  margin: 0;
  font-family: var(--font-cn);
  font-weight: 800;
  font-size: 17px;
  color: var(--white);
}

.page-about .abt-shift__duty {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--body-text);
}

.page-about .abt-shift__meta {
  margin: auto 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line-soft);
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .abt-quality {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
}

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

.page-about .abt-steps li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding: 14px;
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
}

.page-about .abt-steps__n {
  font-family: var(--font-display);
  font-size: 26px;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .abt-steps h3 {
  margin: 0 0 6px;
  font-family: var(--font-cn);
  font-weight: 800;
  font-size: 15px;
  color: var(--white);
}

.page-about .abt-steps p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--body-text);
}

.page-about .abt-quality__panel {
  position: relative;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(92, 255, 200, 0.14), transparent 62%),
    var(--ink-800);
  align-self: start;
}

.page-about .abt-quality__label {
  margin: 0;
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--neon-mist);
}

.page-about .abt-quality__num {
  margin: 10px 0 0;
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-cn);
  font-size: 14px;
  color: var(--white);
}

.page-about .abt-quality__num .stat-num {
  font-family: var(--font-display);
  font-size: clamp(52px, 12vw, 76px);
  line-height: 0.9;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}

.page-about .abt-quality__note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--body-text);
}

.page-about .abt-coverage {
  align-items: start;
}

.page-about .abt-cov {
  padding: 14px 16px;
  background: var(--ink-700);
  border-left: 2px solid var(--line);
  border-radius: var(--radius-s);
}

.page-about .abt-cov h3 {
  margin: 0 0 6px;
  font-family: var(--font-cn);
  font-weight: 800;
  font-size: 15px;
  color: var(--neon-mist);
}

.page-about .abt-cov p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--body-text);
}

.page-about .abt-next {
  display: grid;
  gap: 10px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .abt-next__card {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  grid-template-areas:
    "idx title"
    "idx desc";
  align-items: center;
  gap: 2px 12px;
  padding: 14px 16px;
  text-decoration: none;
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-about .abt-next__card:hover,
.page-about .abt-next__card:focus-visible {
  border-color: var(--neon);
  background: var(--ink-800);
}

.page-about .abt-next__card--amber:hover,
.page-about .abt-next__card--amber:focus-visible {
  border-color: var(--amber);
}

.page-about .abt-next__idx {
  grid-area: idx;
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--neon);
}

.page-about .abt-next__card--amber .abt-next__idx {
  color: var(--amber);
}

.page-about .abt-next__title {
  grid-area: title;
  font-family: var(--font-cn);
  font-weight: 800;
  font-size: 15px;
  color: var(--white);
}

.page-about .abt-next__desc {
  grid-area: desc;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

@media (min-width: 700px) {
  .page-about .abt-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .abt-sec__head {
    grid-template-columns: 118px minmax(0, 1fr);
    align-items: start;
    gap: 18px;
  }

  .page-about .abt-num {
    -webkit-text-stroke-width: 2px;
  }

  .page-about .abt-quality {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: start;
  }

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

  .page-about .abt-flow {
    height: 58px;
  }
}

@media (min-width: 1000px) {
  .page-about .abt-hero__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: end;
  }

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

  .page-about .abt-sec__head {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 28px;
  }

  .page-about .abt-origin {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 36px;
  }

  .page-about .abt-timeline {
    padding-left: 26px;
  }

  .page-about .abt-tl::before {
    left: -26px;
  }

  .page-about .abt-shift {
    padding: 20px;
  }

  .page-about .abt-coverage {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 36px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .abt-shift,
  .page-about .abt-next__card,
  .page-about .abt-tl__box {
    transition: none;
  }

  .page-about .abt-shift:hover,
  .page-about .abt-shift:focus-within {
    transform: none;
  }
}