.page-about {
  --ab-rule: rgba(244, 241, 234, 0.14);
  --ab-rule-dark: rgba(28, 33, 36, 0.12);
  background: var(--c7-gray);
  color: var(--c7-paper);
  overflow-x: clip;
}

.page-about .c7-crumbs {
  padding-top: clamp(18px, 3vw, 30px);
  padding-bottom: 4px;
}

/* ---------- hero ---------- */
.page-about .ab-hero {
  position: relative;
  display: grid;
  gap: 20px;
  margin: 8px 0 clamp(34px, 6vw, 72px);
}

.page-about .ab-hero__frame {
  position: relative;
  padding: clamp(26px, 4.4vw, 60px) clamp(20px, 4vw, 64px) clamp(24px, 3.6vw, 48px);
  border: 1px solid var(--c7-line-strong);
  border-radius: var(--c7-radius-lg);
  background:
    repeating-linear-gradient(90deg, transparent 0 47px, var(--c7-line) 47px 48px),
    linear-gradient(160deg, rgba(31, 111, 115, 0.22), rgba(28, 33, 36, 0.9) 62%);
  overflow: hidden;
}

.page-about .ab-hero__frame::before,
.page-about .ab-hero__frame::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 1px solid var(--c7-copper);
  pointer-events: none;
}

.page-about .ab-hero__frame::before {
  top: 12px;
  left: 12px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .ab-hero__frame::after {
  bottom: 12px;
  right: 12px;
  border-left: 0;
  border-top: 0;
}

.page-about .ab-hero__tag {
  display: inline-block;
  font-family: var(--c7-font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c7-copper);
  border-bottom: 1px solid rgba(180, 112, 58, 0.5);
  padding-bottom: 4px;
  margin-bottom: 18px;
}

.page-about .ab-hero__title {
  margin: 0 0 20px;
  font-family: var(--c7-font-display);
  font-weight: 800;
  font-size: clamp(34px, 6.6vw, 78px);
  line-height: 1.02;
  letter-spacing: -0.01em;
}

.page-about .ab-hero__lede {
  max-width: 62ch;
  margin: 0;
}

.page-about .ab-hero__meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  background: var(--ab-rule);
  border: 1px solid var(--ab-rule);
  border-radius: var(--c7-radius);
  overflow: hidden;
}

.page-about .ab-hero__meta li {
  background: rgba(28, 33, 36, 0.72);
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .ab-hero__k {
  font-family: var(--c7-font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--c7-glaze-2);
}

.page-about .ab-hero__v {
  font-family: var(--c7-font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.4vw, 26px);
  color: var(--c7-paper);
}

.page-about .ab-hero__slip {
  border-left: 3px solid var(--c7-copper);
  padding: 6px 0 6px 16px;
}

.page-about .ab-hero__slipnote {
  margin: 0 0 6px;
  font-family: var(--c7-font-mono);
  font-size: 14px;
  line-height: 1.75;
  color: var(--c7-sand);
}

.page-about .ab-hero__slipsign {
  font-family: var(--c7-font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--c7-glaze-2);
}

/* ---------- layout ---------- */
.page-about .ab-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 46px);
  padding-bottom: clamp(30px, 5vw, 60px);
}

.page-about .ab-rail {
  display: none;
}

.page-about .ab-content {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(46px, 8vw, 96px);
}

.page-about .ab-sec {
  scroll-margin-top: 96px;
}

.page-about .ab-note {
  margin: 22px 0 0;
  border-left: 2px dashed var(--c7-glaze-2);
  padding-left: 14px;
  color: var(--c7-sand);
  font-family: var(--c7-font-mono);
  font-size: 13px;
  line-height: 1.8;
}

.page-about .c7-prose {
  max-width: 74ch;
}

.page-about .c7-prose strong {
  color: var(--c7-neon);
  font-weight: 600;
}

.page-about .c7-prose em {
  font-style: normal;
  color: var(--c7-sand);
  border-bottom: 1px dashed rgba(227, 199, 158, 0.5);
}

/* ---------- 01 origin ---------- */
.page-about .ab-two {
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

.page-about .ab-two__text p + p {
  margin-top: 18px;
}

.page-about .ab-two__media {
  margin: 0;
}

.page-about .ab-sec--origin {
  border-top: 1px solid var(--ab-rule);
  padding-top: 26px;
}

/* ---------- 02 radius ---------- */
.page-about .ab-sec--radius {
  background: var(--c7-ink);
  border-radius: var(--c7-radius-lg);
  padding: clamp(24px, 3.6vw, 46px) clamp(18px, 3.4vw, 44px);
  border-left: 4px solid var(--c7-glaze);
}

.page-about .ab-radius__grid {
  display: grid;
  gap: 1px;
  margin: 28px 0 0;
  background: var(--ab-rule);
  border: 1px solid var(--ab-rule);
  border-radius: var(--c7-radius);
  overflow: hidden;
}

.page-about .ab-radius__card {
  background: rgba(58, 63, 68, 0.86);
  padding: 22px 20px;
}

.page-about .ab-radius__num {
  display: block;
  font-family: var(--c7-font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--c7-copper);
  margin-bottom: 10px;
}

.page-about .ab-radius__h {
  margin: 0 0 10px;
  font-family: var(--c7-font-display);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.02em;
  color: var(--c7-paper);
}

.page-about .ab-radius__card p {
  margin: 0;
  font-family: var(--c7-font-mono);
  font-size: 14px;
  line-height: 1.85;
  color: rgba(244, 241, 234, 0.82);
}

/* ---------- 03 network ---------- */
.page-about .ab-widefig {
  margin: 30px 0 0;
}

.page-about .ab-sec--network .c7-figure__frame {
  border: 1px solid var(--ab-rule);
}

.page-about .ab-table {
  width: 100%;
  margin-top: 30px;
}

.page-about .ab-table__cap {
  text-align: left;
  font-family: var(--c7-font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--c7-glaze-2);
  padding-bottom: 10px;
  caption-side: top;
}

.page-about .ab-roles {
  display: grid;
  gap: 18px;
  margin-top: 28px;
}

.page-about .ab-roles__item {
  padding: 20px 20px 22px;
  border: 1px solid var(--ab-rule);
  border-radius: var(--c7-radius);
  background: rgba(28, 33, 36, 0.5);
}

.page-about .ab-roles__item p {
  margin: 14px 0 0;
  font-family: var(--c7-font-mono);
  font-size: 14px;
  line-height: 1.85;
  color: rgba(244, 241, 234, 0.82);
}

/* ---------- 04 stores ---------- */
.page-about .ab-sec--stores {
  background: var(--c7-paper);
  color: var(--c7-ink);
  border-radius: var(--c7-radius-lg);
  padding: clamp(24px, 3.6vw, 48px) clamp(18px, 3.4vw, 46px);
}

.page-about .ab-sec--stores .c7-sechead__title {
  color: var(--c7-ink);
}

.page-about .ab-sec--stores .c7-sechead__idx {
  color: var(--c7-copper);
}

.page-about .ab-sec--stores .c7-prose {
  color: var(--c7-ink);
}

.page-about .ab-drawers {
  margin-top: 26px;
  border-top: 1px solid var(--ab-rule-dark);
}

.page-about .ab-drawer {
  border-bottom: 1px solid var(--ab-rule-dark);
}

.page-about .ab-drawer .c7-drawer__head {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 18px 0;
  color: var(--c7-ink);
}

.page-about .ab-drawer .c7-drawer__idx {
  font-family: var(--c7-font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--c7-copper);
  min-width: 22px;
}

.page-about .ab-drawer__label {
  flex: 1 1 auto;
  text-align: left;
  font-family: var(--c7-font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.02em;
}

.page-about .ab-drawer .c7-drawer__panel p {
  margin: 0 0 12px;
  font-family: var(--c7-font-mono);
  font-size: 14px;
  line-height: 1.85;
  color: rgba(28, 33, 36, 0.86);
}

.page-about .ab-drawer .c7-drawer__panel p:last-child {
  margin-bottom: 18px;
}

.page-about .ab-steps {
  margin-top: 34px;
  padding: 24px 22px;
  border-radius: var(--c7-radius-lg);
  background: linear-gradient(140deg, rgba(31, 111, 115, 0.14), rgba(227, 199, 158, 0.3));
  border: 1px solid rgba(31, 111, 115, 0.24);
}

.page-about .ab-steps__h {
  margin: 0 0 18px;
  font-family: var(--c7-font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.6vw, 25px);
  color: var(--c7-ink);
}

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

.page-about .ab-steps__list li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  font-family: var(--c7-font-mono);
  font-size: 14px;
  line-height: 1.85;
  color: rgba(28, 33, 36, 0.9);
}

.page-about .ab-steps__n {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--c7-copper);
  color: var(--c7-copper);
  font-size: 13px;
}

.page-about .ab-steps__list strong {
  color: var(--c7-glaze);
}

.page-about .ab-steps__cta {
  margin-top: 22px;
}

.page-about .ab-storefig {
  margin: 34px 0 0;
}

.page-about .ab-storefig .c7-figure__frame {
  border: 1px solid var(--ab-rule-dark);
}

.page-about .ab-storefig .c7-figure__cap {
  color: rgba(28, 33, 36, 0.66);
}

/* ---------- 05 timeline ---------- */
.page-about .ab-tl {
  position: relative;
  margin-top: 30px;
  padding-left: 26px;
}

.page-about .ab-tl__axis {
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: repeating-linear-gradient(180deg, var(--c7-copper) 0 6px, transparent 6px 12px);
  opacity: 0.7;
}

.page-about .ab-tl__item {
  position: relative;
  border-bottom: 1px solid var(--ab-rule);
}

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: -23px;
  top: 26px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--c7-copper);
  box-shadow: 0 0 0 3px rgba(180, 112, 58, 0.2);
}

.page-about .ab-tl__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 12px;
  width: 100%;
  padding: 18px 0 20px;
  text-align: left;
}

.page-about .ab-tl__year {
  font-family: var(--c7-font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1;
  color: var(--c7-copper);
  letter-spacing: 0.01em;
}

.page-about .ab-tl__title {
  font-family: var(--c7-font-mono);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 241, 234, 0.9);
}

.page-about .ab-tl__item .c7-drawer__inner p {
  margin: 0 0 18px;
  font-family: var(--c7-font-mono);
  font-size: 14px;
  line-height: 1.85;
  color: rgba(244, 241, 234, 0.82);
  max-width: 70ch;
}

.page-about .ab-tl__more {
  display: inline-block;
  margin-top: 22px;
  font-family: var(--c7-font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--c7-neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 232, 176, 0.5);
  padding-bottom: 2px;
}

.page-about .ab-tl__more:hover,
.page-about .ab-tl__more:focus-visible {
  color: var(--c7-paper);
  border-bottom-color: var(--c7-paper);
}

/* ---------- 06 specs ---------- */
.page-about .ab-sec--specs {
  border-top: 1px solid var(--ab-rule);
  padding-top: 30px;
}

.page-about .ab-flow {
  display: grid;
  gap: 1px;
  margin-top: 28px;
  background: var(--ab-rule);
  border: 1px solid var(--ab-rule);
  border-radius: var(--c7-radius-lg);
  overflow: hidden;
}

.page-about .ab-flow__col {
  background: rgba(28, 33, 36, 0.8);
  padding: 24px 22px 26px;
}

.page-about .ab-flow__col--alt {
  background: rgba(31, 111, 115, 0.2);
}

.page-about .ab-flow__tag {
  display: inline-block;
  font-family: var(--c7-font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c7-glaze-2);
  border: 1px solid rgba(127, 191, 191, 0.4);
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 18px;
}

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

.page-about .ab-flow__list li {
  position: relative;
  padding-left: 20px;
  font-family: var(--c7-font-mono);
  font-size: 14px;
  line-height: 1.85;
  color: rgba(244, 241, 234, 0.82);
}

.page-about .ab-flow__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 1px;
  background: var(--c7-copper);
}

.page-about .ab-flow__list strong {
  color: var(--c7-paper);
  font-weight: 600;
}

.page-about .ab-flow__tail {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px dashed rgba(127, 191, 191, 0.35);
  font-family: var(--c7-font-mono);
  font-size: 13px;
  line-height: 1.8;
  color: var(--c7-sand);
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 34px;
  background: var(--ab-rule);
  border: 1px solid var(--ab-rule);
  border-radius: var(--c7-radius);
  overflow: hidden;
}

.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: rgba(58, 63, 68, 0.9);
  padding: 22px 18px;
}

.page-about .ab-stat__num {
  font-family: var(--c7-font-display);
  font-weight: 800;
  font-size: clamp(34px, 6vw, 56px);
  line-height: 1;
  color: var(--c7-copper);
}

.page-about .ab-cta {
  margin-top: 34px;
  padding: 26px 22px;
  border-radius: var(--c7-radius-lg);
  border: 1px solid rgba(59, 232, 176, 0.36);
  background: linear-gradient(120deg, rgba(31, 111, 115, 0.36), rgba(28, 33, 36, 0.9));
}

.page-about .ab-cta__t {
  margin: 0 0 18px;
  font-family: var(--c7-font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.6vw, 24px);
  line-height: 1.5;
  color: var(--c7-paper);
}

.page-about .ab-cta__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- aside ---------- */
.page-about .ab-aside {
  display: none;
}

.page-about .ab-aside__box {
  border: 1px solid var(--ab-rule);
  border-radius: var(--c7-radius);
  padding: 18px 16px;
  background: rgba(28, 33, 36, 0.6);
}

.page-about .ab-aside__box + .ab-aside__box {
  margin-top: 14px;
}

.page-about .ab-aside__lbl {
  display: block;
  font-family: var(--c7-font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c7-glaze-2);
  margin-bottom: 12px;
}

.page-about .ab-aside__txt {
  margin: 0;
  font-family: var(--c7-font-mono);
  font-size: 13px;
  line-height: 1.85;
  color: rgba(244, 241, 234, 0.82);
}

.page-about .ab-aside__mark {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--c7-font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--c7-copper);
}

.page-about .ab-aside__box--copper {
  border-color: rgba(180, 112, 58, 0.4);
  background: rgba(180, 112, 58, 0.1);
}

.page-about .ab-aside__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
  font-family: var(--c7-font-mono);
  font-size: 13px;
  color: var(--c7-sand);
}

.page-about .ab-aside__stamp {
  margin-top: 18px;
  text-align: center;
  transform: rotate(-4deg);
}

/* ---------- tail ---------- */
.page-about .ab-tail {
  border-top: 1px solid var(--ab-rule);
  padding: clamp(24px, 4vw, 40px) 0 clamp(34px, 6vw, 64px);
}

.page-about .ab-ruler {
  margin-bottom: 20px;
}

.page-about .ab-tail__note {
  margin: 0;
  max-width: 78ch;
  font-family: var(--c7-font-mono);
  font-size: 12.5px;
  line-height: 1.9;
  color: rgba(244, 241, 234, 0.68);
}

.page-about .ab-tail__note a {
  color: var(--c7-neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 232, 176, 0.4);
}

.page-about .ab-tail__note a:hover,
.page-about .ab-tail__note a:focus-visible {
  color: var(--c7-paper);
  border-bottom-color: var(--c7-paper);
}

/* ---------- responsive ---------- */
@media (min-width: 720px) {
  .page-about .ab-hero {
    grid-template-columns: minmax(0, 1fr) 210px;
    align-items: end;
    gap: 28px;
  }

  .page-about .ab-hero__meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-two {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 32px;
  }

  .page-about .ab-two__media {
    margin-top: 6px;
  }

  .page-about .ab-radius__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .ab-flow {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 30px 30px;
  }

  .page-about .ab-cta__t {
    margin: 0;
    max-width: 46ch;
  }
}

@media (min-width: 1080px) {
  .page-about .ab-layout {
    grid-template-columns: 168px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-rail {
    display: block;
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .ab-rail__head {
    display: block;
    font-family: var(--c7-font-mono);
    font-size: 11px;
    letter-spacing: 0.2em;
    color: var(--c7-glaze-2);
    padding-bottom: 12px;
    border-bottom: 1px solid var(--ab-rule);
    margin-bottom: 14px;
  }

  .page-about .ab-rail .c7-rail__list {
    display: grid;
    gap: 2px;
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .page-about .ab-rail .c7-rail__link {
    display: grid;
    grid-template-columns: 24px minmax(0, 1fr);
    gap: 8px;
    align-items: baseline;
    padding: 9px 4px 9px 8px;
    border-left: 2px solid transparent;
    text-decoration: none;
    color: rgba(244, 241, 234, 0.66);
    transition: color 200ms var(--c7-ease), border-color 200ms var(--c7-ease);
  }

  .page-about .ab-rail .c7-rail__link:hover,
  .page-about .ab-rail .c7-rail__link:focus-visible {
    color: var(--c7-paper);
    border-left-color: var(--c7-glaze-2);
  }

  .page-about .ab-rail .c7-rail__link[aria-current="true"] {
    color: var(--c7-neon);
    border-left-color: var(--c7-neon);
  }

  .page-about .ab-rail .c7-rail__num {
    font-family: var(--c7-font-mono);
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--c7-copper);
  }

  .page-about .ab-rail .c7-rail__title {
    font-family: var(--c7-font-mono);
    font-size: 12.5px;
    line-height: 1.5;
  }

  .page-about .ab-aside {
    display: block;
    position: sticky;
    top: 96px;
    align-self: start;
    width: 208px;
  }
}

@media (min-width: 1320px) {
  .page-about .ab-layout {
    grid-template-columns: 168px minmax(0, 1fr) 216px;
    gap: 42px;
  }

  .page-about .ab-sec--network .ab-widefig {
    margin-left: -18px;
    margin-right: -18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .c7-reveal,
  .page-about .ab-rail .c7-rail__link {
    transition: none;
    animation: none;
  }
}