.page-about {
  --ab-line: var(--phx-mineral);
  --ab-surface: var(--phx-rock);
  --ab-gap: 20px;
  padding-bottom: 0;
}

.page-about .ab-top {
  padding-top: 96px;
}

.page-about .ab-hero {
  padding-top: 24px;
  padding-bottom: 48px;
}

.page-about .ab-hero__frame {
  position: relative;
  padding: clamp(24px, 4.2vw, 58px);
  border: 1px solid var(--ab-line);
  border-radius: 20px;
  overflow: hidden;
  background:
    radial-gradient(120% 82% at 88% 0%, rgba(255, 107, 31, 0.17), transparent 62%),
    linear-gradient(168deg, var(--phx-rock) 0%, var(--phx-obsidian) 74%);
}

.page-about .ab-hero__frame::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(128, 149, 172, 0.16);
  border-radius: 12px;
  pointer-events: none;
}

.page-about .ab-hero__title {
  position: relative;
  max-width: 15em;
  margin-top: 14px;
}

.page-about .ab-hero__lede {
  position: relative;
  max-width: 36em;
  margin-top: 18px;
}

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

.page-about .ab-stats {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 34px 0 0;
  padding: 0;
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
  border-radius: 14px;
  overflow: hidden;
}

.page-about .ab-stats__item {
  background: var(--phx-rock);
  padding: 18px 20px;
}

.page-about .ab-stats__key {
  font-size: 13px;
  color: var(--phx-steel);
  letter-spacing: 0.02em;
}

.page-about .ab-stats__value {
  margin: 8px 0 0;
  font-family: var(--phx-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1;
  color: var(--phx-flame);
}

.page-about .ab-stats__value span {
  margin-left: 5px;
  font-family: var(--phx-font-body);
  font-size: 13px;
  color: var(--phx-steel);
}

.page-about .ab-index {
  position: sticky;
  top: 54px;
  z-index: 24;
  border-top: 1px solid var(--ab-line);
  border-bottom: 1px solid var(--ab-line);
  background: rgba(10, 12, 16, 0.94);
  backdrop-filter: blur(10px);
}

.page-about .ab-index__inner {
  display: flex;
  align-items: center;
  gap: 18px;
  padding-top: 10px;
  padding-bottom: 10px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .ab-index__inner::-webkit-scrollbar {
  display: none;
}

.page-about .ab-index__label {
  flex: none;
  font-family: var(--phx-font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--phx-mist);
}

.page-about .ab-index__list {
  display: flex;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-index__link {
  display: block;
  padding: 4px 0;
  white-space: nowrap;
  text-decoration: none;
  font-family: var(--phx-font-display);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--phx-steel);
  border-bottom: 2px solid transparent;
  transition: color 0.2s var(--phx-ease), border-color 0.2s var(--phx-ease);
}

.page-about .ab-index__link:hover,
.page-about .ab-index__link:focus-visible {
  color: var(--phx-cream);
  border-bottom-color: var(--phx-flame);
}

.page-about .ab-body {
  padding-bottom: 88px;
}

.page-about .ab-chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  padding: 42px 0;
  border-top: 1px solid var(--ab-line);
  scroll-margin-top: 118px;
}

.page-about .ab-chapter__rail {
  min-width: 0;
}

.page-about .ab-chapter__no {
  display: block;
  font-family: var(--phx-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 32px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--phx-flame);
}

.page-about .ab-chapter__title {
  margin: 10px 0 0;
}

.page-about .ab-chapter__sub {
  margin: 14px 0 0;
  max-width: 30em;
  font-size: 15px;
  line-height: 1.7;
  color: var(--phx-steel);
}

.page-about .ab-chapter__main {
  min-width: 0;
}

.page-about .ab-chapter__main > p {
  max-width: 34em;
}

.page-about .ab-chapter__main > * + * {
  margin-top: 20px;
}

.page-about .ab-chapter__main > .phx-copy {
  margin-top: 0;
}

.page-about .ab-chapter__main > .phx-copy + .phx-copy {
  margin-top: 16px;
}

.page-about .ab-note {
  padding: 18px 22px;
  background: var(--ab-surface);
  border: 1px solid var(--ab-line);
  border-left: 3px solid var(--phx-flame);
  border-radius: 12px;
}

.page-about .ab-note__key {
  font-family: var(--phx-font-display);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--phx-flame);
}

.page-about .ab-note__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-note__list li {
  padding: 5px 12px;
  font-size: 13px;
  color: var(--phx-ink);
  border: 1px solid var(--ab-line);
  border-radius: 999px;
}

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

.page-about .ab-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: center;
}

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

.page-about .ab-team__chart svg {
  display: block;
  width: 100%;
  max-width: 170px;
  height: auto;
}

.page-about .ab-team__chart figcaption {
  margin-top: 12px;
  font-family: var(--phx-font-mono);
  font-size: 12px;
  color: var(--phx-steel);
  letter-spacing: 0.04em;
}

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

.page-about .ab-team__legend li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 9px;
  font-size: 15px;
  color: var(--phx-ink);
  border-bottom: 1px dashed var(--ab-line);
}

.page-about .ab-team__dot {
  flex: none;
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.page-about .ab-team__dot--flame { background: var(--phx-flame); }
.page-about .ab-team__dot--steel { background: var(--phx-steel); }
.page-about .ab-team__dot--clay { background: var(--phx-clay); }
.page-about .ab-team__dot--moss { background: var(--phx-moss); }

.page-about .ab-team__num {
  margin-left: auto;
  font-family: var(--phx-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 19px;
  color: var(--phx-cream);
}

.page-about .ab-media {
  margin: 0;
  border: 1px solid var(--ab-line);
  border-radius: 14px;
  overflow: hidden;
  background: var(--ab-surface);
}

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

.page-about .ab-media figcaption {
  padding: 12px 18px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--phx-steel);
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .ab-col {
  padding: 20px 22px;
  background: var(--ab-surface);
  border: 1px solid var(--ab-line);
  border-radius: 14px;
}

.page-about .ab-col--clay {
  background: linear-gradient(150deg, rgba(180, 115, 60, 0.2), var(--phx-rock) 60%);
}

.page-about .ab-col__when {
  display: inline-block;
  padding: 3px 10px;
  font-family: var(--phx-font-mono);
  font-size: 12px;
  color: var(--phx-flame);
  border: 1px solid rgba(255, 107, 31, 0.42);
  border-radius: 999px;
}

.page-about .ab-col .phx-h3 {
  margin: 14px 0 8px;
}

.page-about .ab-col p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--phx-ink);
}

.page-about .ab-cov__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .ab-cov__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .ab-cov__chip {
  display: inline-block;
  padding: 8px 16px;
  font-family: var(--phx-font-display);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--phx-steel);
  background: var(--ab-surface);
  border: 1px solid var(--ab-line);
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.2s var(--phx-ease), background 0.2s var(--phx-ease), border-color 0.2s var(--phx-ease);
}

.page-about .ab-cov__chip:hover {
  color: var(--phx-cream);
  border-color: var(--phx-steel);
}

.page-about .ab-cov__radio:checked + .ab-cov__chip {
  color: var(--phx-obsidian);
  background: var(--phx-flame);
  border-color: var(--phx-flame);
}

.page-about .ab-cov__radio:focus-visible + .ab-cov__chip {
  outline: 2px solid var(--phx-flame);
  outline-offset: 3px;
}

.page-about .ab-cov__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.page-about .ab-cov__card {
  padding: 18px 20px;
  background: var(--ab-surface);
  border: 1px solid var(--ab-line);
  border-radius: 12px;
}

.page-about .ab-cov__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .ab-cov__head .phx-h3 {
  margin: 0;
}

.page-about .ab-cov__count {
  font-family: var(--phx-font-mono);
  font-size: 13px;
  color: var(--phx-flame);
}

.page-about .ab-cov__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-cov__tags li {
  padding: 4px 9px;
  font-size: 13px;
  color: var(--phx-ink);
  background: var(--phx-mineral);
  border-radius: 6px;
}

.page-about .ab-cov:has(#cov-foot:checked) .ab-cov__card:not([data-cat="foot"]),
.page-about .ab-cov:has(#cov-basket:checked) .ab-cov__card:not([data-cat="basket"]),
.page-about .ab-cov:has(#cov-racket:checked) .ab-cov__card:not([data-cat="racket"]),
.page-about .ab-cov:has(#cov-motor:checked) .ab-cov__card:not([data-cat="motor"]),
.page-about .ab-cov:has(#cov-ball:checked) .ab-cov__card:not([data-cat="ball"]) {
  display: none;
}

.page-about .ab-rhythm {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 0;
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
  border-radius: 12px;
  overflow: hidden;
}

.page-about .ab-rhythm__row {
  background: var(--ab-surface);
  padding: 16px 20px;
}

.page-about .ab-rhythm__key {
  font-family: var(--phx-font-display);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--phx-cream);
}

.page-about .ab-rhythm__val {
  margin: 7px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--phx-steel);
}

.page-about .ab-rail-wrap {
  position: relative;
}

.page-about .ab-rail-wrap::before,
.page-about .ab-rail-wrap::after {
  content: "";
  position: absolute;
  top: 34px;
  bottom: 12px;
  width: 48px;
  pointer-events: none;
  z-index: 2;
}

.page-about .ab-rail-wrap::before {
  left: 0;
  background: linear-gradient(90deg, var(--phx-obsidian), transparent);
}

.page-about .ab-rail-wrap::after {
  right: 0;
  background: linear-gradient(270deg, var(--phx-obsidian), transparent);
}

.page-about .ab-rail__title {
  margin: 0 0 12px;
}

.page-about .ab-rail {
  display: flex;
  gap: 12px;
  margin: 0;
  padding: 0 0 14px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
  scrollbar-color: var(--phx-mineral) transparent;
}

.page-about .ab-rail::-webkit-scrollbar {
  height: 6px;
}

.page-about .ab-rail::-webkit-scrollbar-thumb {
  background: var(--phx-mineral);
  border-radius: 3px;
}

.page-about .ab-rail__item {
  flex: 0 0 auto;
  width: 186px;
  padding: 14px 16px;
  scroll-snap-align: start;
  background: linear-gradient(158deg, rgba(180, 115, 60, 0.18), var(--phx-rock) 72%);
  border: 1px solid var(--ab-line);
  border-radius: 12px;
}

.page-about .ab-rail__name {
  display: block;
  font-family: var(--phx-font-display);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--phx-cream);
}

.page-about .ab-rail__num {
  display: block;
  margin-top: 10px;
  font-family: var(--phx-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 24px;
  line-height: 1;
  color: var(--phx-flame);
}

.page-about .ab-rail__unit {
  margin-left: 5px;
  font-family: var(--phx-font-body);
  font-size: 12px;
  color: var(--phx-steel);
}

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

.page-about .ab-tech li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 14px 16px;
  background: var(--ab-surface);
  border: 1px solid var(--ab-line);
  border-radius: 12px;
}

.page-about .ab-tech__idx {
  font-family: var(--phx-font-mono);
  font-size: 13px;
  color: var(--phx-flame);
}

.page-about .ab-tech__text {
  font-size: 15px;
  line-height: 1.72;
  color: var(--phx-ink);
}

.page-about .ab-tech__text strong {
  font-weight: 600;
  color: var(--phx-cream);
}

.page-about .ab-miles {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-miles::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--phx-mineral);
}

.page-about .ab-miles__item {
  position: relative;
  padding-left: 34px;
}

.page-about .ab-miles__item + .ab-miles__item {
  margin-top: 12px;
}

.page-about .ab-miles__item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 20px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--phx-obsidian);
  border: 2px solid var(--phx-flame);
}

.page-about .ab-mile {
  background: var(--ab-surface);
  border: 1px solid var(--ab-line);
  border-radius: 12px;
  overflow: hidden;
}

.page-about .ab-mile__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-mile__head::-webkit-details-marker {
  display: none;
}

.page-about .ab-mile__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--phx-font-mono);
  font-size: 16px;
  color: var(--phx-flame);
}

.page-about .ab-mile[open] .ab-mile__head::after {
  content: "–";
}

.page-about .ab-mile__year {
  font-family: var(--phx-font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  color: var(--phx-flame);
}

.page-about .ab-mile__stage {
  font-family: var(--phx-font-display);
  font-size: 14px;
  letter-spacing: 0.05em;
  color: var(--phx-cream);
}

.page-about .ab-mile__name {
  font-size: 14px;
  color: var(--phx-steel);
}

.page-about .ab-mile__body {
  padding: 14px 18px 18px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--phx-ink);
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .ab-partner {
  padding: 18px 20px;
  background: var(--ab-surface);
  border: 1px solid var(--ab-line);
  border-radius: 12px;
}

.page-about .ab-partner--moss {
  background: linear-gradient(150deg, rgba(111, 143, 92, 0.2), var(--phx-rock) 62%);
}

.page-about .ab-partner .phx-h3 {
  margin: 0 0 8px;
}

.page-about .ab-partner p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--phx-ink);
}

@media (min-width: 640px) {
  .page-about .ab-rhythm {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-team {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: 34px;
  }
}

@media (min-width: 700px) {
  .page-about .ab-columns,
  .page-about .ab-partners,
  .page-about .ab-cov__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 920px) {
  .page-about .ab-chapter {
    grid-template-columns: 236px minmax(0, 1fr);
    column-gap: 66px;
    padding: 66px 0;
  }

  .page-about .ab-chapter__rail {
    position: sticky;
    top: 108px;
    align-self: start;
  }

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

  .page-about .ab-chapter--full .ab-chapter__rail {
    position: static;
  }

  .page-about .ab-chapter__no {
    font-size: 50px;
  }

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

  .page-about .ab-hero__frame {
    border-radius: 24px;
  }
}

@media (min-width: 1080px) {
  .page-about .ab-cov__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-index__link,
  .page-about .ab-cov__chip {
    transition: none;
  }
}