.page-about {
  --about-rail-w: 208px;
  --about-gap: 48px;
}

.page-about section[id],
.page-about [id="about-sections"],
.page-about [id="about-coverage"],
.page-about [id="about-rhythm"],
.page-about [id="about-access"],
.page-about [id="about-evolution"] {
  scroll-margin-top: 128px;
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: 40px 0 48px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -30% -10% auto -10%;
  height: 360px;
  background: radial-gradient(58% 100% at 18% 0%, rgba(86, 200, 232, 0.16), transparent 72%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: end;
}

.page-about .about-hero__copy .headline {
  margin: 10px 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.16;
  font-size: var(--fs-display);
  color: var(--snow);
}

.page-about .about-hero__copy .lede {
  max-width: 38em;
  color: var(--frost);
  font-size: var(--fs-body);
  line-height: 1.8;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 30px;
  background: var(--line-ice);
  border: 1px solid var(--line-ice);
}

.page-about .about-hero__fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 14px 16px;
  background: var(--panel);
}

.page-about .about-hero__fact-num {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--glow);
  letter-spacing: 0.02em;
}

.page-about .about-hero__fact-num small {
  font-size: 0.52em;
  margin-left: 3px;
  color: var(--frost);
  letter-spacing: 0.06em;
}

.page-about .about-hero__fact-label {
  font-size: var(--fs-note);
  color: var(--frost);
  line-height: 1.5;
}

.page-about .about-hero__media {
  margin: 0;
  aspect-ratio: 16 / 9;
}

.page-about .about-hero__media .media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .about-hero__media .media-frame__cap {
  font-size: var(--fs-note);
  color: var(--frost);
  padding: 8px 2px 0;
}

/* ---------- Shell / Rail ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-bottom: 40px;
}

.page-about .about-rail {
  border-top: 2px solid var(--rail);
  padding-top: 14px;
}

.page-about .about-rail__title {
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--rail);
  margin-bottom: 10px;
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  list-style: none;
  margin: 0;
}

.page-about .about-rail__item {
  flex: 0 0 auto;
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 10px;
  border-bottom: 2px solid transparent;
  color: var(--frost);
  font-size: var(--fs-small);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--ease), border-color var(--ease), background-color var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--snow);
  border-bottom-color: var(--alert);
  background: var(--panel);
}

.page-about .about-rail__no {
  font-size: 12px;
  color: var(--ice);
  letter-spacing: 0.08em;
}

/* ---------- Blocks ---------- */
.page-about .about-block {
  padding: 8px 0 34px;
  border-bottom: 1px solid var(--line-ice);
}

.page-about .about-block + .about-block {
  padding-top: 34px;
}

.page-about .about-cut {
  display: block;
  width: 72px;
  height: 3px;
  background: var(--alert);
  margin-bottom: 20px;
}

.page-about .about-block .section__title {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.24;
  font-size: var(--fs-h2);
  color: var(--snow);
  margin: 8px 0 10px;
}

.page-about .about-block .section__note {
  color: var(--frost);
  font-size: var(--fs-small);
  line-height: 1.75;
  max-width: 40em;
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-note);
  letter-spacing: 0.14em;
  color: var(--ice);
  text-transform: uppercase;
}

.page-about .prose p {
  max-width: 38em;
  color: var(--frost);
  font-size: var(--fs-body);
  line-height: 1.8;
  margin-bottom: 14px;
}

.page-about .about-strong {
  color: var(--glow);
  font-weight: 700;
}

/* ---------- Content lines ---------- */
.page-about .about-lines {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-top: 2px solid var(--rail);
}

.page-about .about-line {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 0 20px;
  border-bottom: 1px solid var(--line-ice);
  transition: background-color var(--ease), border-color var(--ease);
}

.page-about .about-line:hover {
  background: rgba(18, 59, 82, 0.45);
  border-bottom-color: var(--ice);
}

.page-about .about-line__no {
  font-size: 18px;
  font-weight: 700;
  color: var(--ice);
  letter-spacing: 0.08em;
}

.page-about .about-line__name {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--snow);
}

.page-about .about-line__text {
  color: var(--frost);
  font-size: var(--fs-small);
  line-height: 1.85;
}

/* ---------- Scale ---------- */
.page-about .about-scale {
  margin-top: 26px;
  border-top: 2px solid var(--rail);
}

.page-about .about-scale__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 20px 0 22px;
  border-bottom: 1px solid var(--line-ice);
}

.page-about .about-scale__num {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: clamp(38px, 12vw, 56px);
  font-weight: 700;
  line-height: 1;
  color: var(--glow);
  letter-spacing: 0.02em;
}

.page-about .about-scale__num small {
  font-size: 0.24em;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--frost);
  white-space: nowrap;
}

.page-about .about-scale__desc strong {
  display: block;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--snow);
  margin-bottom: 6px;
}

.page-about .about-scale__desc p {
  color: var(--frost);
  font-size: var(--fs-small);
  line-height: 1.8;
  max-width: 38em;
}

/* ---------- Rhythm ---------- */
.page-about .about-rhythm__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.page-about .about-rhythm__media {
  margin: 0;
  aspect-ratio: 12 / 7;
}

.page-about .about-rhythm__media .media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .about-rhythm__media .media-frame__cap,
.page-about .about-access__media .media-frame__cap {
  font-size: var(--fs-note);
  color: var(--frost);
  padding: 8px 2px 0;
}

.page-about .about-clock {
  position: relative;
  height: 84px;
  margin: 30px 0 12px;
  border: 2px solid var(--rail);
  background-color: var(--panel);
  background-image: repeating-linear-gradient(
    90deg,
    var(--split) 0 1px,
    transparent 1px 4.1667%
  );
  box-shadow: var(--soft);
}

.page-about .about-clock__tick {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--glow);
  box-shadow: 0 0 10px rgba(143, 243, 226, 0.55);
}

.page-about .about-clock__tick--a {
  left: 37.5%;
}

.page-about .about-clock__tick--b {
  left: 87.5%;
}

.page-about .about-clock__label {
  position: absolute;
  top: -24px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  color: var(--glow);
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.page-about .about-clock__burst {
  position: absolute;
  top: 26px;
  bottom: 26px;
  left: 12.5%;
  width: 25%;
  border: 2px dashed var(--alert);
  background: rgba(255, 90, 31, 0.08);
}

.page-about .about-clock__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  font-size: var(--fs-note);
  color: var(--frost);
}

.page-about .about-clock__legend span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .about-key {
  display: inline-block;
  width: 14px;
  height: 8px;
}

.page-about .about-key--batch {
  background: var(--glow);
}

.page-about .about-key--burst {
  border: 2px dashed var(--alert);
  background: rgba(255, 90, 31, 0.12);
}

.page-about .about-key--span {
  background: var(--rail);
}

/* ---------- Access ---------- */
.page-about .about-access__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.page-about .about-access__media {
  margin: 0;
  aspect-ratio: 10 / 7;
}

.page-about .about-access__media .media-frame__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .about-access__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 28px;
  background: var(--line-ice);
  border: 2px solid var(--rail);
}

.page-about .about-access__stats .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px 18px;
  background: var(--panel);
}

.page-about .about-access__stats .stat__num {
  font-size: clamp(24px, 7vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--ice);
  letter-spacing: 0.02em;
}

.page-about .about-access__stats .stat__num small {
  font-size: 0.4em;
  margin-left: 4px;
  color: var(--frost);
  letter-spacing: 0.06em;
}

.page-about .about-access__stats .stat__label {
  font-size: var(--fs-note);
  color: var(--frost);
  line-height: 1.5;
}

/* ---------- Evolution ---------- */
.page-about .about-track {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin-top: 34px;
}

.page-about .about-stage {
  position: relative;
  padding: 30px 18px 20px;
  background: var(--panel);
  border: 2px solid var(--rail);
  box-shadow: var(--soft);
  transition: transform var(--ease), border-color var(--ease);
}

.page-about .about-stage:hover {
  transform: translateY(-2px);
  border-color: var(--ice);
}

.page-about .about-stage__node {
  position: absolute;
  top: -11px;
  left: 18px;
  width: 20px;
  height: 20px;
  border: 2px solid var(--ice);
  background: var(--bg);
  border-radius: 50%;
}

.page-about .about-stage__node--slant {
  border: none;
  border-radius: 0;
  background: var(--ice);
  clip-path: polygon(0 0, 74% 0, 100% 26%, 100% 100%, 0 100%);
}

.page-about .about-stage__node--live {
  background: var(--glow);
  box-shadow: 0 0 0 5px rgba(143, 243, 226, 0.18);
}

.page-about .about-stage__step {
  font-size: var(--fs-note);
  letter-spacing: 0.12em;
  color: var(--rail);
  margin-bottom: 8px;
}

.page-about .about-stage__name {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 700;
  color: var(--snow);
  margin-bottom: 10px;
}

.page-about .about-stage__text {
  color: var(--frost);
  font-size: var(--fs-small);
  line-height: 1.8;
}

.page-about .about-track__note {
  margin-top: 26px;
  padding: 16px 18px;
  border-left: 3px solid var(--alert);
  background: var(--split);
  color: var(--snow);
  font-size: var(--fs-small);
  line-height: 1.85;
  max-width: 46em;
}

/* ---------- Next ---------- */
.page-about .about-next {
  padding: 34px 0 8px;
}

.page-about .about-next__title {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 800;
  color: var(--snow);
  margin-bottom: 12px;
}

.page-about .about-next__text {
  color: var(--frost);
  font-size: var(--fs-body);
  line-height: 1.85;
  max-width: 40em;
  margin-bottom: 22px;
}

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

/* ---------- Responsive ---------- */
@media (min-width: 720px) {
  .page-about .about-line {
    grid-template-columns: 56px 168px minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
  }

  .page-about .about-scale__row {
    grid-template-columns: 232px minmax(0, 1fr);
    align-items: baseline;
    gap: 32px;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 56px 0 56px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 44px;
  }

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

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

  .page-about .about-track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-about .about-track::before {
    content: "";
    position: absolute;
    top: -15px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--rail), var(--ice) 48%, var(--glow));
  }
}

@media (min-width: 980px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 128px;
    border-top: 2px solid var(--rail);
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-rail__link {
    border-bottom: none;
    border-left: 2px solid transparent;
    padding: 9px 10px;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-bottom-color: transparent;
    border-left-color: var(--alert);
  }
}

@media (max-width: 420px) {
  .page-about .about-hero__facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .about-clock__label {
    font-size: 11px;
  }
}