.page-about {
  --about-rail: 208px;
  --about-gap: clamp(24px, 4vw, 64px);
  --about-pad: clamp(48px, 8vw, 100px);
}

.page-about .section {
  padding-block: var(--about-pad);
}

.page-about .section--seam {
  border-top: 1px solid var(--hair);
}

.page-about .filed-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
  margin: 0;
}

.page-about .section--ink .filed-no,
.page-about .section--deep .filed-no {
  color: var(--flare);
}

.page-about .about-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 32px);
}

.page-about .about-body {
  min-width: 0;
}

.page-about .about-intro {
  margin: 0 0 clamp(24px, 3.4vw, 40px);
  color: var(--soft);
  line-height: 1.85;
  max-width: 40em;
}

.page-about .about-intro--dark {
  color: var(--ash);
}

/* ---------- cover ---------- */

.page-about .about-cover {
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(232, 255, 58, 0.12), transparent 58%),
    var(--ink);
  color: var(--paper);
  padding-top: clamp(28px, 4.5vw, 52px);
  padding-bottom: 0;
  overflow: hidden;
}

.page-about .about-cover__crumb {
  margin-bottom: clamp(28px, 5vw, 56px);
  font-size: 13px;
}

.page-about .about-cover .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-cover .breadcrumb__link {
  color: var(--mist);
  text-decoration: none;
}

.page-about .about-cover .breadcrumb__link:hover {
  color: var(--flare);
}

.page-about .breadcrumb__current {
  color: var(--paper);
}

.page-about .about-cover__no {
  color: var(--flare);
  letter-spacing: 0.18em;
  font-size: 12px;
  text-transform: uppercase;
}

.page-about .about-cover__title {
  font-size: clamp(36px, 6.6vw, 86px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 300;
  margin: clamp(14px, 2.6vw, 26px) 0 0;
  max-width: 15em;
  color: var(--paper);
}

.page-about .about-cover__lede {
  margin: clamp(18px, 3vw, 32px) 0 0;
  max-width: 42em;
  color: var(--ash);
  line-height: 1.85;
  font-size: clamp(15px, 1.4vw, 18px);
}

.page-about .cover-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 24px;
  list-style: none;
  margin: clamp(30px, 5vw, 52px) 0 0;
  padding: clamp(22px, 3vw, 34px) 0 0;
  border-top: 1px solid var(--hair-light);
}

.page-about .cover-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .cover-stat__num {
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 500;
  line-height: 1;
  color: var(--flare);
  letter-spacing: -0.01em;
}

.page-about .cover-stat__label {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .cover-frame {
  margin-top: clamp(32px, 5vw, 60px);
}

.page-about .cover-frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--r-lg) var(--r-lg) 0 0;
  filter: saturate(0.66) contrast(1.04) brightness(0.9);
}

/* ---------- what we do ---------- */

.page-about .about-entries {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-entry {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: clamp(22px, 3vw, 34px) 0;
  border-top: 1px solid var(--hair);
}

.page-about .about-entry:last-child {
  border-bottom: 1px solid var(--hair);
}

.page-about .about-entry__no {
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 500;
  color: var(--mist);
  line-height: 1.2;
}

.page-about .about-entry__title {
  margin: 0 0 10px;
  font-size: clamp(19px, 2.1vw, 25px);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--black);
}

.page-about .about-entry__body p {
  margin: 0;
  color: var(--soft);
  line-height: 1.85;
  max-width: 38em;
}

.page-about .about-entry__body a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--flare);
  padding-bottom: 1px;
  transition: background-color 0.18s ease;
}

.page-about .about-entry__body a:hover {
  background-color: rgba(232, 255, 58, 0.45);
}

/* ---------- timeline ---------- */

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .tl__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: clamp(16px, 2.4vw, 26px) clamp(14px, 2vw, 24px);
  border-left: 2px solid rgba(232, 255, 58, 0.2);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  transition: background-color 0.22s ease, border-color 0.22s ease;
}

.page-about .tl__item + .tl__item {
  margin-top: 6px;
}

.page-about .tl__item:hover {
  background-color: rgba(244, 241, 232, 0.07);
  border-left-color: var(--flare);
}

.page-about .tl__year {
  font-size: clamp(19px, 2.3vw, 26px);
  font-weight: 500;
  color: var(--flare);
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.page-about .tl__title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .tl__body p {
  margin: 0;
  color: var(--ash);
  line-height: 1.82;
  max-width: 38em;
}

/* ---------- verification flow ---------- */

.page-about .flow-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .flow__item {
  position: relative;
  padding-left: 44px;
  padding-bottom: clamp(24px, 3.2vw, 34px);
}

.page-about .flow__item::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 18px;
  bottom: 0;
  width: 1px;
  background: var(--hair-strong);
}

.page-about .flow__item:last-child {
  padding-bottom: 0;
}

.page-about .flow__item:last-child::before {
  display: none;
}

.page-about .flow__dot {
  position: absolute;
  left: 6px;
  top: 5px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--flare);
  border: 2px solid var(--ink);
  box-sizing: border-box;
}

.page-about .flow__step {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .flow__title {
  margin: 6px 0 8px;
  font-size: clamp(18px, 1.9vw, 22px);
  font-weight: 600;
  color: var(--black);
}

.page-about .flow__text {
  margin: 0;
  color: var(--soft);
  line-height: 1.85;
  max-width: 36em;
}

.page-about .flow-figure {
  margin: 0;
}

.page-about .flow-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--r-md);
  filter: saturate(0.66) contrast(1.03);
}

/* ---------- team ---------- */

.page-about .team-matrix {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 48px);
}

.page-about .team-card__num {
  margin: 0;
  font-size: clamp(48px, 7.5vw, 84px);
  font-weight: 500;
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--flare);
}

.page-about .team-card__title {
  margin: 12px 0 8px;
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 600;
  color: var(--paper);
}

.page-about .team-card__note {
  margin: 0 0 18px;
  color: var(--ash);
  line-height: 1.8;
  max-width: 34em;
}

.page-about .team-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--hair-light);
}

.page-about .team-list__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--hair-light);
}

.page-about .team-list__n {
  min-width: 2.4em;
  font-size: clamp(18px, 1.8vw, 22px);
  font-weight: 500;
  color: var(--flare);
}

.page-about .team-list__label {
  font-size: 14px;
  color: var(--ash);
  letter-spacing: 0.02em;
}

/* ---------- competition switch ---------- */

.page-about .cat-switch {
  position: relative;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(146px, 1fr));
  gap: 10px;
}

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

.page-about .cat-pill {
  display: block;
  padding: 12px 16px;
  border: 1px solid var(--hair-strong);
  border-radius: var(--r-pill);
  font-size: 14px;
  line-height: 1.3;
  text-align: center;
  color: var(--black);
  cursor: pointer;
  transition: background-color 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.page-about .cat-pill:hover {
  border-color: var(--ink);
}

.page-about .cat-input:checked + .cat-pill {
  background: var(--flare);
  border-color: var(--flare);
}

.page-about .cat-input:focus-visible + .cat-pill {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.page-about .cat-panels {
  grid-column: 1 / -1;
  margin-top: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--hair);
}

.page-about .cat-panel {
  display: none;
  margin: 0;
  color: var(--soft);
  line-height: 1.85;
  max-width: 42em;
}

.page-about .cat-switch:has(#cat-01:checked) #cat-panel-01,
.page-about .cat-switch:has(#cat-02:checked) #cat-panel-02,
.page-about .cat-switch:has(#cat-03:checked) #cat-panel-03,
.page-about .cat-switch:has(#cat-04:checked) #cat-panel-04,
.page-about .cat-switch:has(#cat-05:checked) #cat-panel-05,
.page-about .cat-switch:has(#cat-06:checked) #cat-panel-06,
.page-about .cat-switch:has(#cat-07:checked) #cat-panel-07,
.page-about .cat-switch:has(#cat-08:checked) #cat-panel-08,
.page-about .cat-switch:has(#cat-09:checked) #cat-panel-09,
.page-about .cat-switch:has(#cat-10:checked) #cat-panel-10,
.page-about .cat-switch:has(#cat-11:checked) #cat-panel-11,
.page-about .cat-switch:has(#cat-12:checked) #cat-panel-12 {
  display: block;
}

/* ---------- collaboration ---------- */

.page-about .collab {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.2vw, 40px);
}

.page-about .collab__figure {
  margin: 0;
}

.page-about .collab__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--r-md);
  filter: saturate(0.66) contrast(1.03);
}

.page-about .collab__body p {
  margin: 0 0 16px;
  color: var(--soft);
  line-height: 1.85;
  max-width: 38em;
}

.page-about .collab-list {
  list-style: none;
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding: 0;
  border-top: 1px solid var(--hair);
}

.page-about .collab-list__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--hair);
}

.page-about .collab-list__n {
  min-width: 2.6em;
  font-size: clamp(17px, 1.8vw, 21px);
  font-weight: 500;
  color: var(--ink);
}

.page-about .collab-list__label {
  font-size: 14px;
  color: var(--soft);
}

/* ---------- filing ---------- */

.page-about .filing {
  margin: 0;
  border-top: 1px solid var(--hair-light);
}

.page-about .filing__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--hair-light);
}

.page-about .filing__key {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .filing__val {
  margin: 0;
  font-size: clamp(15px, 1.5vw, 17px);
  color: var(--paper);
  word-break: break-word;
}

.page-about .filing__row--icp {
  border: 1px solid var(--flare);
  border-radius: var(--r-pill);
  padding: 12px 20px;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 6px;
}

.page-about .filing__row--icp .filing__val {
  color: var(--flare);
}

.page-about .filing-note {
  margin: clamp(22px, 3vw, 32px) 0 0;
  color: var(--ash);
  line-height: 1.85;
  max-width: 40em;
}

.page-about .filing-note a {
  color: var(--flare);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 255, 58, 0.5);
}

.page-about .filing-note a:hover {
  border-bottom-color: var(--flare);
}

/* ---------- next year ---------- */

.page-about .next-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .next-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: clamp(20px, 2.8vw, 30px) 0;
  border-top: 1px solid var(--hair);
}

.page-about .next-item:last-child {
  border-bottom: 1px solid var(--hair);
}

.page-about .next-item__no {
  font-size: clamp(17px, 1.9vw, 22px);
  font-weight: 500;
  color: var(--mist);
  line-height: 1.2;
}

.page-about .next-item__title {
  margin: 0 0 8px;
  font-size: clamp(17px, 1.9vw, 21px);
  font-weight: 600;
  color: var(--black);
  letter-spacing: -0.01em;
}

.page-about .next-item__body p {
  margin: 0;
  color: var(--soft);
  line-height: 1.85;
  max-width: 38em;
}

.page-about .next-tail {
  margin: clamp(24px, 3.2vw, 36px) 0 0;
  color: var(--soft);
  line-height: 1.85;
  max-width: 40em;
}

.page-about .next-tail a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--flare);
  padding-bottom: 1px;
  transition: background-color 0.18s ease;
}

.page-about .next-tail a:hover {
  background-color: rgba(232, 255, 58, 0.45);
}

/* ---------- responsive ---------- */

@media (min-width: 700px) {
  .page-about .about-entry {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 24px;
  }

  .page-about .next-item {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 24px;
  }

  .page-about .tl__item {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 26px;
    align-items: start;
  }

  .page-about .filing__row {
    grid-template-columns: 160px minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
  }

  .page-about .filing__row--icp {
    grid-template-columns: 160px minmax(0, 1fr);
  }

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

@media (min-width: 900px) {
  .page-about .about-row {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
  }

  .page-about .about-rail {
    position: sticky;
    top: 116px;
    align-self: start;
  }

  .page-about .about-rail .section-title {
    margin-top: 8px;
  }
}

@media (min-width: 980px) {
  .page-about .flow-layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .collab {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
    gap: clamp(28px, 4vw, 56px);
  }

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

  .page-about .team-matrix > .team-card + .team-card {
    border-left: 1px solid var(--hair-light);
    padding-left: clamp(28px, 4vw, 56px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl__item,
  .page-about .cat-pill,
  .page-about .about-entry__body a,
  .page-about .next-tail a {
    transition: none;
  }
}