.page-about {
  --about-rail-w: 156px;
  --about-gap: 44px;
  background: var(--paper);
  color: var(--ink);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--indigo);
  color: var(--cloud);
  padding: 112px 0 52px;
}
.page-about .about-hero__media {
  position: absolute;
  inset: 0;
}
.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 38%;
  opacity: 0.44;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(22, 35, 63, 0.92) 0%, rgba(22, 35, 63, 0.74) 44%, rgba(94, 22, 32, 0.88) 100%);
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}
.page-about .about-hero .breadcrumbs {
  margin-bottom: 24px;
  font-size: 12px;
}
.page-about .about-hero .breadcrumbs li {
  color: var(--mist);
}
.page-about .about-hero .breadcrumbs a {
  color: var(--gold);
  text-decoration: none;
}
.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(32px, 8vw, 70px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--cloud);
  overflow-wrap: break-word;
}
.page-about .about-hero__lede {
  margin-top: 20px;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.86);
}
.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 40px;
  margin: 34px 0 0;
  padding: 22px 0 0;
  list-style: none;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}
.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 92px;
}
.page-about .about-hero__stats .num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 25px;
  line-height: 1.1;
  letter-spacing: 0.04em;
  color: var(--gold);
}
.page-about .about-hero__stats li > span:last-child {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

/* ---------- Body grid ---------- */
.page-about .about-body {
  display: block;
  padding-top: 20px;
  padding-bottom: 72px;
}
.page-about .about-rail {
  display: none;
}
.page-about .about-stream {
  min-width: 0;
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 168px 0 92px;
  }
  .page-about .about-body {
    display: grid;
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-gap);
    align-items: start;
    padding-top: 40px;
    padding-bottom: 104px;
  }
  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 24px);
    padding-bottom: 40px;
  }
}

/* ---------- Rail ---------- */
.page-about .about-rail .note-vertical {
  margin: 0 0 18px;
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--slate);
}
.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 0 10px 14px;
  border-left: 2px solid var(--line);
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 13px;
  letter-spacing: 0.12em;
  transition: color 0.25s ease, border-color 0.25s ease, background-color 0.25s ease;
}
.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--crimson);
  border-left-color: var(--gold);
  background: rgba(201, 162, 39, 0.09);
}
.page-about .about-rail__idx {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 11px;
  color: var(--gold-ink);
}
.page-about:has(#claim:target) .about-rail__link[href="#claim"],
.page-about:has(#compare:target) .about-rail__link[href="#compare"],
.page-about:has(#verify:target) .about-rail__link[href="#verify"],
.page-about:has(#timeline:target) .about-rail__link[href="#timeline"],
.page-about:has(#team:target) .about-rail__link[href="#team"],
.page-about:has(#loop:target) .about-rail__link[href="#loop"] {
  color: var(--crimson);
  border-left-color: var(--gold);
  background: rgba(201, 162, 39, 0.09);
}

/* ---------- Nodes ---------- */
.page-about .about-node {
  position: relative;
  padding: 40px 0;
  scroll-margin-top: calc(var(--header-h) + 24px);
}
.page-about .about-node + .about-node:not(.about-node--dark) {
  border-top: 1px solid var(--line);
}
.page-about .about-node + .about-node:not(.about-node--dark)::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 56px;
  height: 1px;
  background: var(--gold);
}
.page-about .about-node__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-bottom: 18px;
}
.page-about .about-node__step {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--gold-ink);
}
.page-about .about-node__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 900;
  font-size: clamp(23px, 3.6vw, 35px);
  line-height: 1.24;
  color: var(--ink);
  overflow-wrap: break-word;
}
.page-about .about-node__lead {
  margin: 0;
  max-width: 40em;
}
.page-about .about-node__intro {
  max-width: 34em;
  margin: 0 0 26px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}
.page-about .about-node__body {
  max-width: 36em;
  margin: 24px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}
.page-about .about-node__body a {
  color: var(--crimson);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.page-about .about-node__body a:hover {
  color: var(--gold-ink);
}

@media (min-width: 900px) {
  .page-about .about-node {
    padding: 56px 0;
  }
  .page-about .about-node:first-child {
    padding-top: 4px;
  }
}

/* ---------- Three lines ---------- */
.page-about .about-lines {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}
.page-about .about-line {
  background: var(--cloud);
  padding: 24px 22px 26px;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}
.page-about .about-line .about-line__tag {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.22em;
  font-weight: 600;
  color: var(--gold-ink);
}
.page-about .about-line h3 {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-weight: 900;
  font-size: 21px;
  color: var(--crimson);
}
.page-about .about-line > p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ink-soft);
}

@media (min-width: 720px) {
  .page-about .about-lines {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- Dark panel ---------- */
.page-about .about-node--dark {
  position: relative;
  margin: 34px 0;
  padding: 36px 22px 40px;
  background: var(--indigo);
  color: var(--cloud);
  border-top: none;
  clip-path: polygon(0 0, calc(100% - 32px) 0, 100% 32px, 100% 100%, 32px 100%, 0 calc(100% - 32px));
}
.page-about .about-node--dark::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px 16px),
    repeating-linear-gradient(-45deg, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px 16px);
}
.page-about .about-node--dark > * {
  position: relative;
  z-index: 1;
}
.page-about .about-node--dark .about-node__title {
  color: var(--cloud);
}
.page-about .about-node--dark .about-node__step {
  color: var(--gold);
}
.page-about .about-node--dark .about-node__intro {
  color: var(--mist);
}
.page-about .about-node--dark .about-node__body {
  color: rgba(255, 255, 255, 0.82);
}
.page-about .about-node--dark .about-node__body a {
  color: var(--gold);
}

@media (min-width: 900px) {
  .page-about .about-node--dark {
    margin: 52px 0;
    padding: 52px 48px 56px;
  }
}

/* ---------- Compare ---------- */
.page-about .about-dir {
  display: grid;
  gap: 14px;
  margin-top: 4px;
}
.page-about .about-dir__item {
  background: rgba(255, 255, 255, 0.06);
  border-left: 3px solid var(--gold);
  padding: 20px 20px 22px;
}
.page-about .about-dir .about-dir__label {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.2em;
  font-weight: 600;
  color: var(--gold);
}
.page-about .about-dir__item h3 {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-weight: 900;
  font-size: 19px;
  color: var(--cloud);
}
.page-about .about-dir__item > p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.8);
}

@media (min-width: 720px) {
  .page-about .about-dir {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .about-hint {
  margin-top: 22px;
  padding: 20px 22px 22px;
  background: var(--amber);
  color: var(--ink);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}
.page-about .about-hint .about-hint__title {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--ink);
}
.page-about .about-hint p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(20, 22, 28, 0.86);
}

/* ---------- Figures ---------- */
.page-about .about-figure {
  margin: 28px 0 0;
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
}
.page-about .about-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}
.page-about .about-node:not(.about-node--dark) .about-figure figcaption {
  color: var(--ink-soft);
}

/* ---------- Steps ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}
.page-about .about-step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 0 14px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}
.page-about .about-step:last-child {
  border-bottom: 1px solid var(--line);
}
.page-about .about-step__no {
  padding-top: 2px;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--gold-ink);
}
.page-about .about-step__body h3 {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 8px;
  font-family: var(--serif);
  font-weight: 900;
  font-size: 19px;
  color: var(--ink);
}
.page-about .about-step__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}
.page-about .about-note {
  margin: 18px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--gold);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- Timeline ---------- */
.page-about .about-time {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}
.page-about .about-time__item {
  position: relative;
  padding: 0 0 32px 34px;
}
.page-about .about-time__item::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px var(--paper), 0 0 0 4px rgba(58, 66, 82, 0.22);
}
.page-about .about-time__item::after {
  content: "";
  position: absolute;
  left: 11px;
  top: 22px;
  bottom: 4px;
  width: 1px;
  background: linear-gradient(180deg, var(--line), rgba(58, 66, 82, 0.04));
}
.page-about .about-time__item:last-child {
  padding-bottom: 0;
}
.page-about .about-time__item:last-child::after {
  display: none;
}
.page-about .about-time .about-time__phase {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.24em;
  font-weight: 700;
  color: var(--crimson);
}
.page-about .about-time__item h3 {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-weight: 900;
  font-size: 20px;
  color: var(--ink);
}
.page-about .about-time__item > p:last-child {
  margin: 0;
  max-width: 36em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- Version switch ---------- */
.page-about .ver-switch {
  margin-top: 32px;
  padding: 20px 20px 6px;
  background: var(--cloud);
  border-top: 3px solid var(--gold);
}
.page-about .ver-switch__input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}
.page-about .ver-switch__tabs {
  display: flex;
  gap: 6px;
  border-bottom: 1px solid var(--line);
}
.page-about .ver-switch__tab {
  margin-bottom: -1px;
  padding: 8px 18px 10px;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--slate);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.page-about .ver-switch__tab:hover {
  color: var(--crimson);
}
.page-about .ver-panel {
  display: none;
  max-width: 38em;
  padding: 20px 0 8px;
}
.page-about .ver-panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}
.page-about #about-ver-v1:checked ~ .ver-switch__panels .ver-panel--1,
.page-about #about-ver-v2:checked ~ .ver-switch__panels .ver-panel--2,
.page-about #about-ver-v3:checked ~ .ver-switch__panels .ver-panel--3 {
  display: block;
}
.page-about #about-ver-v1:checked ~ .ver-switch__tabs .ver-switch__tab[for="about-ver-v1"],
.page-about #about-ver-v2:checked ~ .ver-switch__tabs .ver-switch__tab[for="about-ver-v2"],
.page-about #about-ver-v3:checked ~ .ver-switch__tabs .ver-switch__tab[for="about-ver-v3"] {
  color: var(--crimson);
  border-bottom-color: var(--gold);
}
.page-about .ver-switch:has(.ver-switch__input:focus-visible) .ver-switch__tabs {
  outline: 2px solid var(--gold);
  outline-offset: 4px;
}

/* ---------- Folds ---------- */
.page-about .about-folds {
  display: grid;
  gap: 12px;
  margin-top: 30px;
}
.page-about .about-folds .fold {
  background: var(--cloud);
  border-left: 3px solid var(--slate);
}
.page-about .about-folds .fold-trigger {
  width: 100%;
  padding: 16px 18px;
  font-family: var(--sans);
  font-size: 14.5px;
  font-weight: 700;
  line-height: 1.6;
  text-align: left;
  color: var(--ink);
  background: none;
  border: 0;
  cursor: pointer;
}
.page-about .about-folds .fold-trigger:hover {
  color: var(--crimson);
}
.page-about .about-folds .fold-panel {
  padding: 0 18px 18px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}
.page-about .about-folds .fold-panel p {
  margin: 0;
}

/* ---------- Team ---------- */
.page-about .about-team {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}
.page-about .about-team__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 20px 24px;
  background: var(--cloud);
  border-top: 3px solid var(--crimson);
}
.page-about .about-team__count {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold-ink);
}
.page-about .about-team__card h3 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 900;
  font-size: 18px;
  color: var(--ink);
}
.page-about .about-team__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}

@media (min-width: 620px) {
  .page-about .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (min-width: 1000px) {
  .page-about .about-team {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- Metrics & closing ---------- */
.page-about .about-metrics {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-metrics li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}
.page-about .about-metrics .num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.03em;
  color: var(--gold);
}
.page-about .about-metrics li > span:last-child {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}
.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.page-about .about-contact-line {
  margin: 20px 0 0;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

@media (min-width: 620px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media (min-width: 1000px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
  }
}

/* ---------- Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .ver-switch__tab {
    transition: none;
  }
}