.page-about {
  --about-cut: 16px;
  --about-pad: clamp(20px, 4vw, 40px);
  display: block;
  background: var(--ink);
  color: var(--text);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 4vw, 44px) 0 clamp(32px, 5vw, 56px);
  background:
    radial-gradient(120% 90% at 12% -10%, rgba(124, 77, 255, 0.18), transparent 58%),
    radial-gradient(90% 70% at 92% 8%, rgba(47, 208, 255, 0.11), transparent 62%),
    var(--ink);
  overflow: hidden;
}

.page-about .about-hero__frame {
  position: relative;
  margin-top: 20px;
  padding: var(--about-pad);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(200, 162, 74, 0.07), rgba(7, 7, 11, 0) 58%);
}

.page-about .about-hero__frame::before,
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  width: 24px;
  height: 24px;
  border: 1px solid var(--gold);
  opacity: 0.72;
  pointer-events: none;
}

.page-about .about-hero__frame::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .about-hero__frame::after {
  right: -1px;
  bottom: -1px;
  border-top: 0;
  border-left: 0;
}

.page-about .about-hero__frame .lead {
  margin-top: clamp(16px, 2.4vw, 24px);
  max-width: 62ch;
  color: var(--muted);
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(24px, 3.6vw, 40px) 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-hero__fact {
  padding: 16px 18px;
  background: var(--obsidian);
}

.page-about .about-hero__fact dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .about-hero__fact dd {
  margin: 8px 0 0;
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 300;
  letter-spacing: 0.01em;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__fact:nth-child(3) dd {
  color: var(--amber);
}

/* ---------- Shared section head ---------- */
.page-about .about-section-head {
  max-width: 66ch;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .about-h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 250;
  font-size: clamp(28px, 4.4vw, 48px);
  line-height: 1.14;
  letter-spacing: 0.02em;
  color: var(--text);
}

.page-about .about-section-head__note {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- Timeline ---------- */
.page-about .about-timeline {
  position: relative;
  padding: clamp(48px, 8vw, 96px) 0;
  background: var(--obsidian);
  overflow: hidden;
}

.page-about .about-timeline__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.24;
}

.page-about .about-timeline__bg img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  object-position: center top;
}

.page-about .about-timeline .wrap {
  position: relative;
  z-index: 1;
}

.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 32px;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--gold) 8%, var(--gold) 90%, transparent);
  opacity: 0.55;
}

.page-about .timeline__item {
  position: relative;
  padding-bottom: clamp(18px, 2.6vw, 30px);
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 16px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 1px solid var(--gold);
  background: var(--ink);
  box-shadow: 0 0 0 4px rgba(200, 162, 74, 0.10);
}

.page-about .timeline__item:nth-child(3)::before,
.page-about .timeline__item:nth-child(6)::before {
  border-color: var(--amber);
  box-shadow: 0 0 0 5px rgba(255, 138, 61, 0.14);
}

.page-about .timeline__detail {
  border: 1px solid var(--line);
  border-left: 2px solid rgba(200, 162, 74, 0.45);
  background: var(--graphite);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
  transition: border-left-color 0.28s var(--ease), background 0.28s var(--ease);
}

.page-about .timeline__detail[open] {
  border-left-color: var(--amber);
  background: linear-gradient(180deg, rgba(200, 162, 74, 0.06), rgba(28, 28, 40, 0.9) 70%);
}

.page-about .timeline__summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .timeline__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1;
  color: var(--muted);
  transition: color 0.24s var(--ease);
}

.page-about .timeline__detail[open] .timeline__summary::after {
  content: "–";
  color: var(--amber);
}

.page-about .timeline__year {
  font-size: 15px;
  font-weight: 500;
  color: var(--electric);
  font-variant-numeric: tabular-nums;
}

.page-about .timeline__ver {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .timeline__label {
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--text);
}

.page-about .timeline__desc {
  margin: 0;
  padding: 0 18px 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 58ch;
}

/* ---------- Categories ---------- */
.page-about .about-cats {
  padding: clamp(48px, 8vw, 96px) 0;
  background: linear-gradient(180deg, var(--obsidian), var(--ink) 70%);
}

.page-about .about-cats__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .about-cats__text > p {
  margin: 16px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-cats__list {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-cats__item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 4px 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-cats__idx {
  grid-row: span 2;
  font-size: 30px;
  font-weight: 300;
  line-height: 1;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .about-cats__name {
  font-size: 17px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--text);
}

.page-about .about-cats__sub {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-cats__media {
  margin: 0;
  position: relative;
  border: 1px solid var(--line);
}

/* ---------- Team ---------- */
.page-about .about-team {
  padding: clamp(48px, 8vw, 96px) 0;
  background: var(--ink);
}

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

.page-about .about-team__seg {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--gold);
  background: var(--graphite);
  transition: border-left-color 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .about-team__seg:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

.page-about .about-team__seg-name {
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--text);
}

.page-about .about-team__seg-num {
  font-size: 17px;
  font-weight: 500;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__seg--dev { border-left-color: #C8A24A; }
.page-about .about-team__seg--ops { border-left-color: #B98C3C; }
.page-about .about-team__seg--cs  { border-left-color: #7C4DFF; }
.page-about .about-team__seg--edit { border-left-color: #2FD0FF; }
.page-about .about-team__seg--legal { border-left-color: #FF8A3D; }

.page-about .about-team__seg-desc {
  position: absolute;
  left: 0;
  top: calc(100% + 8px);
  z-index: 3;
  width: max-content;
  max-width: min(260px, 78vw);
  padding: 9px 12px;
  border: 1px solid var(--line);
  background: var(--ink);
  font-size: 12px;
  line-height: 1.65;
  color: var(--muted);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px);
  transition: opacity 0.24s var(--ease), transform 0.24s var(--ease), visibility 0.24s;
}

.page-about .about-team__seg:hover .about-team__seg-desc,
.page-about .about-team__seg:focus-visible .about-team__seg-desc {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.page-about .about-team__foot {
  margin: clamp(26px, 3.4vw, 38px) 0 0;
  max-width: 62ch;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
  padding-left: 16px;
  border-left: 1px solid var(--gold);
}

/* ---------- Region ---------- */
.page-about .about-region {
  padding: clamp(48px, 8vw, 96px) 0;
  background: var(--obsidian);
}

.page-about .about-region__media {
  margin: 0 0 clamp(26px, 3.6vw, 40px);
  border: 1px solid var(--line);
  position: relative;
}

.page-about .about-region__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-region__list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  padding: 16px 18px;
  background: var(--ink);
  transition: background 0.24s var(--ease);
}

.page-about .about-region__list li:hover {
  background: var(--graphite);
}

.page-about .about-region__idx {
  grid-row: span 2;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--electric);
  padding-top: 4px;
}

.page-about .about-region__name {
  font-size: 16px;
  letter-spacing: 0.06em;
  color: var(--text);
}

.page-about .about-region__desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- Legal ---------- */
.page-about .about-legal {
  padding: clamp(48px, 8vw, 96px) 0 clamp(56px, 9vw, 110px);
  background:
    linear-gradient(160deg, rgba(200, 162, 74, 0.07), transparent 46%),
    var(--ink);
}

.page-about .about-legal__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-about .about-legal__intro > p {
  margin: 16px 0 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-legal__icp {
  margin-top: clamp(22px, 3vw, 32px);
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--gold);
  background: var(--graphite);
  display: grid;
  gap: 6px;
}

.page-about .about-legal__icp-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .about-legal__icp-num {
  font-size: 18px;
  font-weight: 500;
  color: var(--champagne);
  letter-spacing: 0.04em;
}

.page-about .about-legal__icp-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

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

.page-about .about-legal__rule {
  border: 1px solid var(--line);
  background: var(--obsidian);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
  transition: border-color 0.24s var(--ease);
}

.page-about .about-legal__rule[open] {
  border-color: rgba(200, 162, 74, 0.42);
}

.page-about .about-legal__rule > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--text);
}

.page-about .about-legal__rule > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-legal__rule > p {
  margin: 0;
  padding: 0 18px 16px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 56ch;
}

.page-about .about-legal__rule-idx {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .about-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(32px, 4.6vw, 56px);
  padding-top: clamp(24px, 3.4vw, 36px);
  border-top: 1px solid var(--line);
}

/* ---------- Responsive ---------- */
@media (min-width: 720px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-cats__grid {
    grid-template-columns: 5fr 6fr;
    grid-template-areas: "text media";
  }

  .page-about .about-cats__text { grid-area: text; }
  .page-about .about-cats__media { grid-area: media; }

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

  .page-about .about-team__stack {
    display: flex;
    align-items: stretch;
    gap: 3px;
    height: 116px;
  }

  .page-about .about-team__seg {
    flex: 1 1 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: flex-start;
    gap: 6px;
    padding: 14px 12px;
    border: 0;
    border-bottom: 3px solid var(--gold);
    background: linear-gradient(180deg, rgba(28, 28, 40, 0.55), rgba(28, 28, 40, 1));
    transition: transform 0.24s var(--ease), background 0.24s var(--ease);
  }

  .page-about .about-team__seg:hover {
    transform: translateY(-6px);
    background: linear-gradient(180deg, rgba(200, 162, 74, 0.12), rgba(28, 28, 40, 1));
  }

  .page-about .about-team__seg--dev { flex-grow: 40; }
  .page-about .about-team__seg--ops { flex-grow: 35; }
  .page-about .about-team__seg--cs { flex-grow: 25; }
  .page-about .about-team__seg--edit { flex-grow: 12; }
  .page-about .about-team__seg--legal { flex-grow: 8; }

  .page-about .about-team__seg--dev { border-bottom-color: #C8A24A; }
  .page-about .about-team__seg--ops { border-bottom-color: #B98C3C; }
  .page-about .about-team__seg--cs { border-bottom-color: #7C4DFF; }
  .page-about .about-team__seg--edit { border-bottom-color: #2FD0FF; }
  .page-about .about-team__seg--legal { border-bottom-color: #FF8A3D; }

  .page-about .about-team__seg-name {
    font-size: 13px;
    letter-spacing: 0.14em;
    color: var(--muted);
  }

  .page-about .about-team__seg-num {
    font-size: 22px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-legal__grid {
    grid-template-columns: 5fr 6fr;
  }

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

  .page-about .timeline__summary {
    padding: 16px 22px;
  }

  .page-about .timeline__desc {
    padding: 0 22px 18px;
  }
}

@media (min-width: 1280px) {
  .page-about .about-hero__frame {
    padding: 48px 52px 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__seg,
  .page-about .about-team__seg-desc,
  .page-about .timeline__detail,
  .page-about .about-legal__rule {
    transition-duration: 0.12s;
  }

  .page-about .about-team__seg:hover {
    transform: none;
  }
}