.page-about {
  --about-soft: rgba(244, 239, 226, 0.74);
  --about-faint: rgba(244, 239, 226, 0.52);
  --about-ink-soft: rgba(10, 34, 26, 0.68);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-text);
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3,
.page-about h4 {
  font-family: var(--font-display);
  margin: 0;
}

.page-about p { margin: 0; }
.page-about ul,
.page-about ol { margin: 0; padding: 0; list-style: none; }
.page-about a { color: inherit; }
.page-about .num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

/* ---------- hero ---------- */
.about-hero {
  padding: clamp(16px, 4vw, 36px) 0 clamp(28px, 5vw, 56px);
  background:
    radial-gradient(110% 80% at 88% 0%, rgba(47, 123, 255, 0.18), transparent 62%),
    radial-gradient(90% 70% at 4% 8%, rgba(255, 90, 31, 0.14), transparent 60%),
    linear-gradient(180deg, #04120d 0%, var(--ink) 72%);
}

.about-hero__frame {
  position: relative;
  margin-top: 18px;
  padding: clamp(18px, 4vw, 44px);
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(12, 43, 33, 0.72), rgba(6, 26, 19, 0.9));
  box-shadow: var(--shadow);
}

.about-hero__frame::before,
.about-hero__frame::after {
  content: "";
  position: absolute;
  width: 26px;
  height: 26px;
}

.about-hero__frame::before {
  top: -1px;
  left: -1px;
  border-top: 1px solid var(--orange);
  border-left: 1px solid var(--orange);
}

.about-hero__frame::after {
  right: -1px;
  bottom: -1px;
  border-right: 1px solid var(--blue);
  border-bottom: 1px solid var(--blue);
}

.about-hero__title {
  margin: 10px 0 16px;
  font-size: clamp(30px, 7vw, 66px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 22ch;
}

.about-hero__lead {
  max-width: 62ch;
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.78;
  color: var(--about-soft);
}

.about-hero__figure { margin-top: clamp(20px, 3vw, 34px); }

.about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: clamp(22px, 3vw, 34px) 0 0;
  border-top: 1px solid var(--line);
}

.about-hero__stat {
  padding: 16px 14px 6px 0;
  border-bottom: 1px solid var(--line-soft);
}

.about-hero__stat dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--about-faint);
}

.about-hero__stat dd {
  margin: 6px 0 10px;
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  color: var(--orange);
  line-height: 1;
}

.about-hero__stat dd span {
  font-family: var(--font-text);
  font-size: 13px;
  font-weight: 500;
  color: var(--about-soft);
  margin-left: 4px;
}

/* ---------- layout ---------- */
.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 4vw, 40px);
  padding-bottom: clamp(40px, 7vw, 90px);
}

.about-index { display: none; }

.about-index-mobile {
  border: 1px solid var(--line);
  background: rgba(12, 43, 33, 0.6);
  padding: 12px 14px;
}

.about-index-mobile summary {
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--blue-soft);
  list-style: none;
}

.about-index-mobile summary::-webkit-details-marker { display: none; }

.about-index-mobile summary::after {
  content: "＋";
  float: right;
  color: var(--orange);
}

.about-index-mobile[open] summary::after { content: "－"; }

.about-index-mobile__list {
  margin-top: 12px;
  display: grid;
  gap: 8px;
}

.about-index-mobile__list a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
  text-decoration: none;
  color: var(--paper);
  padding: 6px 0;
  border-bottom: 1px solid var(--line-soft);
}

.about-index-mobile__list .num {
  font-size: 12px;
  color: var(--orange);
}

/* ---------- section base ---------- */
.about-body {
  display: grid;
  gap: clamp(34px, 6vw, 72px);
  min-width: 0;
}

.about-section,
.about-timeline,
.about-team-block,
.about-partners,
.about-audience {
  min-width: 0;
}

.about-chapter {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--about-faint);
  margin-bottom: 14px;
}

.about-chapter .num {
  font-size: 14px;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: 0.04em;
}

.about-chapter__line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line), transparent);
}

.about-section__title {
  font-size: clamp(23px, 4.6vw, 40px);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: -0.01em;
  max-width: 26ch;
}

.about-section__lead {
  margin-top: 14px;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--about-soft);
}

.about-section__text {
  margin-top: 16px;
  display: grid;
  gap: 14px;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--about-soft);
}

/* ---------- story ---------- */
.about-story__points {
  margin-top: 24px;
  display: grid;
  gap: 12px;
}

.about-story__points li {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--blue);
  background: linear-gradient(120deg, rgba(12, 43, 33, 0.85), rgba(6, 26, 19, 0.7));
}

.about-story__points li:nth-child(2) { border-left-color: var(--orange); }
.about-story__points li:nth-child(3) { border-left-color: var(--blue-soft); }

.about-story__points h3 {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
  color: var(--paper);
}

.about-story__points p {
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--about-soft);
}

/* ---------- figures ---------- */
.page-about .figure { margin: 0; }

.page-about .figure__media {
  overflow: hidden;
  border: 1px solid var(--line);
}

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

.page-about .figure__cap {
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--about-faint);
}

/* ---------- timeline ---------- */
.about-timeline {
  position: relative;
  padding: clamp(20px, 4vw, 34px);
  border: 1px solid var(--line);
  background:
    linear-gradient(115deg, rgba(255, 90, 31, 0.1) 0%, transparent 38%),
    rgba(12, 43, 33, 0.55);
  overflow: hidden;
}

.about-timeline::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: -60px;
  width: 180px;
  height: 180px;
  border: 1px solid rgba(47, 123, 255, 0.35);
  transform: rotate(38deg);
  pointer-events: none;
}

.about-filter { margin-top: 20px; }

.about-filter__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.about-filter__btn {
  appearance: none;
  cursor: pointer;
  font-family: var(--font-text);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  padding: 8px 13px;
  color: var(--about-soft);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.about-filter__btn:hover {
  color: var(--paper);
  border-color: var(--orange-soft);
}

.about-filter__btn[aria-pressed="true"] {
  color: var(--ink);
  background: var(--orange);
  border-color: var(--orange);
  font-weight: 700;
}

.about-timeline__list {
  display: grid;
  gap: 12px;
  position: relative;
}

.about-timeline__item {
  position: relative;
  padding: 15px 16px 16px 18px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  background: rgba(6, 26, 19, 0.78);
}

.about-timeline__item[hidden] { display: none; }

.about-timeline__item h3 {
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 7px;
}

.about-timeline__item p {
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--about-soft);
}

.about-timeline__year {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--blue-soft);
  margin-bottom: 6px;
}

.about-filter__empty {
  margin-top: 16px;
  font-size: 14px;
  color: var(--orange-soft);
}

/* ---------- team ---------- */
.about-team__figure { margin-top: 20px; }

.about-team {
  margin-top: 20px;
  display: grid;
  gap: 10px;
}

.about-role {
  border: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(12, 43, 33, 0.8), rgba(6, 26, 19, 0.6));
  break-inside: avoid;
}

.about-role summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  list-style: none;
}

.about-role summary::-webkit-details-marker { display: none; }

.about-role summary::after {
  content: "＋";
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--orange);
  flex: none;
}

.about-role[open] summary::after { content: "－"; }

.about-role__count {
  font-size: 13px;
  color: var(--blue-soft);
  margin-left: auto;
  margin-right: 12px;
}

.about-role__body {
  padding: 0 16px 16px;
  border-top: 1px solid var(--line-soft);
  padding-top: 12px;
}

.about-role__body p {
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-soft);
}

/* ---------- coverage (paper band) ---------- */
.about-coverage {
  background: var(--paper);
  color: var(--ink-text);
  padding: clamp(22px, 5vw, 44px);
  border-top: 3px solid var(--orange);
  border-bottom: 1px solid rgba(10, 34, 26, 0.2);
}

.about-chapter--dark { color: var(--about-ink-soft); }

.about-chapter--dark .about-chapter__line {
  background: linear-gradient(90deg, rgba(10, 34, 26, 0.28), transparent);
}

.about-coverage .about-section__title { max-width: 24ch; }

.about-coverage__grid {
  margin-top: 18px;
  display: grid;
  gap: 20px;
}

.about-coverage__text {
  display: grid;
  gap: 13px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--ink-text);
}

.about-coverage__figure .figure__media { border-color: rgba(10, 34, 26, 0.24); }
.about-coverage__figure .figure__cap { color: var(--about-ink-soft); }

.about-cats {
  margin-top: 26px;
  display: grid;
  gap: 10px;
  grid-template-columns: minmax(0, 1fr);
}

.about-cats__item {
  padding: 14px 16px;
  border: 1px solid rgba(10, 34, 26, 0.16);
  background: rgba(255, 255, 255, 0.34);
}

.about-cats__item .num {
  display: block;
  font-size: 12px;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: 0.1em;
  margin-bottom: 6px;
}

.about-cats__item h3 {
  font-size: 15px;
  font-weight: 800;
  margin-bottom: 6px;
  color: var(--ink-text);
}

.about-cats__item p {
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-ink-soft);
}

/* ---------- partners ---------- */
.about-tagband {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.about-tagband .tag {
  border: 1px solid var(--line);
  background: rgba(47, 123, 255, 0.1);
  color: var(--paper);
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
}

.about-tagband .tag:nth-child(odd) {
  background: rgba(255, 90, 31, 0.12);
  border-color: rgba(255, 90, 31, 0.45);
}

.about-partners__subtitle {
  margin: 28px 0 14px;
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--blue-soft);
  font-weight: 700;
}

.about-honors {
  display: grid;
  gap: 10px;
}

.about-honors li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: rgba(12, 43, 33, 0.55);
}

.about-honors .num {
  flex: none;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--ink);
  background: var(--blue-soft);
}

.about-honors h4 {
  font-size: 15px;
  font-weight: 800;
  margin-bottom: 5px;
}

.about-honors p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-soft);
}

/* ---------- audience ---------- */
.about-audience__list {
  margin-top: 20px;
  display: grid;
  gap: 10px;
}

.about-audience__list li {
  padding: 15px 16px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--line);
  background: rgba(12, 43, 33, 0.45);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}

.about-audience__list li:hover {
  border-top-color: var(--orange);
  transform: translateY(-2px);
}

.about-audience__list h3 {
  font-size: 15px;
  font-weight: 800;
  margin-bottom: 7px;
}

.about-audience__list p {
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--about-soft);
}

.about-cta {
  margin-top: 24px;
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line);
  background:
    linear-gradient(120deg, rgba(255, 90, 31, 0.16), rgba(47, 123, 255, 0.14)),
    var(--ink-2);
  display: grid;
  gap: 16px;
}

.about-cta__text h3 {
  font-size: 19px;
  font-weight: 800;
  margin-bottom: 8px;
}

.about-cta__text p {
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--about-soft);
  max-width: 56ch;
}

.about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.about-cta__actions .btn {
  text-decoration: none;
  font-size: 13.5px;
  padding: 10px 18px;
}

.about-contact {
  margin-top: 20px;
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--blue);
  background: rgba(6, 26, 19, 0.7);
}

.about-contact h3 {
  font-size: 17px;
  font-weight: 800;
  margin-bottom: 14px;
}

.about-contact__list {
  display: grid;
  gap: 10px;
  margin: 0;
}

.about-contact__list > div {
  display: grid;
  gap: 3px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}

.about-contact__list dt {
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--about-faint);
}

.about-contact__list dd {
  margin: 0;
  font-size: 14.5px;
  color: var(--paper);
  word-break: break-word;
}

.about-contact__list dd a {
  color: var(--blue-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 211, 255, 0.4);
}

.about-contact__note {
  margin-top: 14px;
  font-size: 13.5px;
  line-height: 1.76;
  color: var(--about-soft);
}

.about-contact__note a {
  color: var(--orange-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- breakpoints ---------- */
@media (min-width: 620px) {
  .about-hero__stats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .about-hero__stat { padding-right: 18px; }
  .about-story__points { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .about-cats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .about-audience__list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .about-cta { grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); align-items: center; }
  .about-timeline__list { gap: 14px; }
}

@media (min-width: 900px) {
  .about-layout {
    grid-template-columns: 218px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
    padding-top: 10px;
  }

  .about-index-mobile { display: none; }

  .about-index {
    display: block;
    position: sticky;
    top: 96px;
    border-top: 2px solid var(--orange);
    padding-top: 14px;
  }

  .about-index__title {
    font-size: 11.5px;
    letter-spacing: 0.2em;
    color: var(--about-faint);
    margin-bottom: 12px;
  }

  .about-index__list {
    display: grid;
    gap: 2px;
    border-left: 1px solid var(--line);
  }

  .about-index__link {
    display: flex;
    gap: 10px;
    align-items: baseline;
    padding: 8px 0 8px 12px;
    margin-left: -1px;
    border-left: 1px solid transparent;
    font-size: 13px;
    line-height: 1.5;
    text-decoration: none;
    color: var(--about-soft);
    transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
  }

  .about-index__link .num {
    font-size: 11px;
    color: var(--orange);
    flex: none;
  }

  .about-index__link:hover {
    color: var(--paper);
    border-left-color: var(--orange);
  }

  .about-index__note {
    margin-top: 16px;
    font-size: 12px;
    line-height: 1.7;
    color: var(--about-faint);
    border-top: 1px solid var(--line-soft);
    padding-top: 12px;
  }

  .about-timeline__item:nth-child(even) {
    margin-left: 9%;
    border-left-color: var(--blue);
  }

  .about-timeline__item:nth-child(odd) { margin-right: 6%; }

  .about-team {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

  .about-coverage__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
    gap: 30px;
  }

  .about-cats { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .about-honors { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .about-honors li { flex-direction: column; }
  .about-audience__list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .about-contact__list { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 1160px) {
  .about-section__text { font-size: 16.5px; }
  .about-coverage__text { font-size: 15.5px; }
  .about-hero__frame { padding: clamp(32px, 4vw, 56px); }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-audience__list li,
  .page-about .about-filter__btn,
  .page-about .about-index__link { transition: none; }
  .page-about .about-audience__list li:hover { transform: none; }
}