.page-about {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  overflow-x: clip;
}

.page-about .about-band {
  height: 8px;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 42%);
}

.page-about .about-band--green { background: var(--green); }
.page-about .about-band--ink { background: var(--ink); }
.page-about .about-band--gold { background: var(--gold); }
.page-about .about-band--deep { background: var(--deep); }

/* ---------- hero ---------- */

.page-about .about-hero {
  position: relative;
  padding-block: clamp(24px, 4vw, 48px) clamp(44px, 7vw, 84px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -150px;
  right: -170px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(31, 122, 90, 0.2), rgba(31, 122, 90, 0) 68%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-h1 {
  margin: 14px 0 0;
  font-size: clamp(32px, 5.4vw, 64px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -0.01em;
  max-width: 12em;
  transform: skewX(-1.5deg);
  transform-origin: left center;
}

.page-about .about-lede {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  max-width: 30em;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.85;
}

.page-about .about-facts {
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 22px 0 0;
  list-style: none;
  border-top: 1px solid rgba(14, 27, 44, 0.16);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px 16px;
}

.page-about .about-facts li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-about .fact-num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(23px, 3vw, 32px);
  line-height: 1;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.page-about .fact-label {
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: rgba(14, 27, 44, 0.72);
}

/* ---------- section frame ---------- */

.page-about .about-sec {
  padding-block: clamp(48px, 7vw, 92px);
}

.page-about .about-sec--dark {
  background: var(--ink);
  color: var(--white);
}

.page-about .about-sec--warm {
  background: var(--paper-warm);
}

.page-about .about-sec--deep {
  background: var(--deep);
  color: var(--white);
}

.page-about .sec-num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(40px, 6.6vw, 74px);
  line-height: 0.86;
  letter-spacing: -0.02em;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--green);
  font-variant-numeric: tabular-nums;
}

.page-about .about-sec--dark .sec-num { -webkit-text-stroke-color: var(--gold); }
.page-about .about-sec--deep .sec-num { -webkit-text-stroke-color: var(--green-bright); }

.page-about .sec-title {
  margin: 12px 0 0;
  font-size: clamp(25px, 3.5vw, 42px);
  line-height: 1.22;
  font-weight: 800;
  letter-spacing: -0.01em;
  max-width: 18em;
}

.page-about .about-note {
  margin: clamp(16px, 2vw, 22px) 0 0;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  max-width: 34em;
}

.page-about .about-sec--dark .about-note,
.page-about .about-sec--deep .about-note {
  color: rgba(253, 252, 247, 0.82);
}

/* ---------- chapter 01 ---------- */

.page-about .about-two {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

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

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radius);
  border: 2px solid rgba(14, 27, 44, 0.14);
}

.page-about .about-figure .media-caption {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: rgba(14, 27, 44, 0.62);
}

.page-about .duty-list {
  list-style: none;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(14, 27, 44, 0.14);
  border-block: 1px solid rgba(14, 27, 44, 0.14);
}

.page-about .duty-list li {
  background: var(--paper);
  padding: 16px 0;
}

.page-about .duty-name {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--green);
}

.page-about .duty-list p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  max-width: 32em;
}

/* ---------- chapter 02 coverage ---------- */

.page-about .cov-figure {
  margin: clamp(24px, 3.5vw, 36px) 0 0;
}

.page-about .cov-figure img,
.page-about .badge-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
}

.page-about .cov-figure img {
  aspect-ratio: 12 / 7;
  border: 1px solid rgba(253, 252, 247, 0.2);
}

.page-about .badge-figure {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

.page-about .badge-figure img {
  aspect-ratio: 1 / 1;
  border: 1px solid rgba(253, 252, 247, 0.2);
}

.page-about .badge-figure .media-caption {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.65;
  color: rgba(253, 252, 247, 0.7);
}

.page-about .cov-bar {
  list-style: none;
  margin: clamp(24px, 3.5vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .cov-block {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  min-width: 0;
  min-height: 118px;
  padding: 16px 16px 18px;
  border-radius: 14px;
  transition: transform 0.28s var(--ease);
}

.page-about .cov-block:hover {
  transform: translateY(-4px);
}

.page-about .cov-block--a { background: var(--green); color: var(--white); }
.page-about .cov-block--b { background: var(--green-bright); color: var(--ink); }
.page-about .cov-block--c { background: var(--gold); color: var(--ink); }
.page-about .cov-block--d { background: var(--deep); color: var(--white); border: 1px solid rgba(253, 252, 247, 0.28); }
.page-about .cov-block--e { background: var(--paper-warm); color: var(--ink); }

.page-about .cov-name {
  font-size: 16px;
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: 0.02em;
}

.page-about .cov-tags {
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  opacity: 0.88;
}

/* ---------- chapter 03 dossier table ---------- */

.page-about .dossier-wrap {
  margin-top: clamp(22px, 3vw, 32px);
  overflow-x: auto;
}

.page-about .dossier-table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  text-align: left;
  font-size: 15px;
}

.page-about .dossier-cap {
  caption-side: top;
  text-align: left;
  padding-bottom: 12px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: rgba(14, 27, 44, 0.62);
}

.page-about .dossier-table thead th {
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--green);
  border-bottom: 2px solid var(--green);
  white-space: nowrap;
}

.page-about .dossier-table tbody th,
.page-about .dossier-table tbody td {
  padding: 14px 12px;
  vertical-align: top;
  border-bottom: 1px solid rgba(14, 27, 44, 0.14);
  line-height: 1.75;
}

.page-about .dossier-table tbody tr:nth-child(even) {
  background: var(--paper-warm);
}

.page-about .dossier-field {
  font-weight: 800;
  color: var(--ink);
  white-space: nowrap;
}

/* ---------- chapter 04 split ---------- */

.page-about .split {
  margin-top: clamp(26px, 3.5vw, 40px);
  display: grid;
  gap: 34px;
}

.page-about .col-title {
  margin: 0;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .stage-list,
.page-about .group-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .stage-list li {
  padding-left: 16px;
  border-left: 3px solid var(--green);
}

.page-about .stage-list li:nth-child(2) { border-left-color: var(--green-bright); }
.page-about .stage-list li:nth-child(3) { border-left-color: var(--gold); }

.page-about .stage-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: rgba(14, 27, 44, 0.6);
}

.page-about .stage-name {
  margin: 5px 0 4px;
  font-size: 16px;
  font-weight: 800;
}

.page-about .stage-list p:last-child,
.page-about .group-list p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
}

.page-about .group-list li {
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(14, 27, 44, 0.14);
}

.page-about .group-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .group-name {
  margin: 0 0 5px;
  font-size: 15px;
  font-weight: 800;
  color: var(--green);
  letter-spacing: 0.03em;
}

/* ---------- chapter 05 timeline ---------- */

.page-about .tl {
  list-style: none;
  margin: clamp(26px, 3.5vw, 40px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 22px;
  bottom: 22px;
  width: 1px;
  background: rgba(14, 27, 44, 0.2);
}

.page-about .tl-item {
  position: relative;
  padding-left: 34px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--gold);
}

.page-about .tl-summary {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .tl-summary:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 2px;
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: clamp(19px, 2.4vw, 26px);
  font-weight: 600;
  line-height: 1;
  color: var(--green);
  font-variant-numeric: tabular-nums;
}

.page-about .tl-label {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
}

.page-about .tl-cue {
  flex: 0 0 auto;
  font-size: 20px;
  line-height: 1;
  color: var(--mist);
  transition: transform 0.22s var(--ease);
}

.page-about .tl-details[open] .tl-cue {
  transform: rotate(45deg);
}

.page-about .tl-body {
  padding: 0 0 16px;
}

.page-about .tl-body p {
  margin: 0;
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(14, 27, 44, 0.82);
}

/* ---------- chapter 06 partners ---------- */

.page-about .partner-grid {
  margin-top: clamp(26px, 3.5vw, 40px);
  display: grid;
  gap: 1px;
  background: rgba(253, 252, 247, 0.24);
  border-block: 1px solid rgba(253, 252, 247, 0.24);
}

.page-about .partner-cell {
  background: var(--deep);
  padding: 20px 0;
}

.page-about .partner-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 600;
  line-height: 1;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .partner-label {
  margin: 8px 0 0;
  font-size: 14.5px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--white);
}

.page-about .partner-text {
  margin: 8px 0 0;
  max-width: 34em;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(253, 252, 247, 0.8);
}

.page-about .about-cta {
  margin-top: clamp(28px, 4vw, 40px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-sec--deep .btn-ghost {
  border-color: rgba(253, 252, 247, 0.44);
  color: var(--white);
}

.page-about .about-sec--deep .btn-ghost:hover,
.page-about .about-sec--deep .btn-ghost:focus-visible {
  background: rgba(253, 252, 247, 0.12);
}

/* ---------- breakpoints ---------- */

@media (min-width: 640px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .duty-list li {
    display: grid;
    grid-template-columns: 9em minmax(0, 1fr);
    gap: 8px 18px;
    align-items: start;
    padding: 18px 0;
  }

  .page-about .duty-name {
    margin: 0;
  }
}

@media (min-width: 860px) {
  .page-about .cov-bar {
    grid-template-columns: 5fr 3fr 4fr 3fr 2.6fr;
  }

  .page-about .split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 0;
  }

  .page-about .split-col:first-child {
    padding-right: clamp(24px, 3vw, 40px);
  }

  .page-about .split-col + .split-col {
    padding-left: clamp(24px, 3vw, 40px);
    border-left: 1px solid rgba(14, 27, 44, 0.18);
  }

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

  .page-about .partner-cell {
    padding: 24px clamp(20px, 3vw, 32px) 24px 0;
  }

  .page-about .partner-cell--wide {
    grid-column: 1 / -1;
    padding-right: 0;
    display: grid;
    grid-template-columns: 12em minmax(0, 1fr);
    gap: 10px 24px;
    align-items: start;
  }

  .page-about .partner-cell--wide .partner-label {
    margin: 0;
  }

  .page-about .partner-cell--wide .partner-text {
    margin: 0;
    max-width: 44em;
  }
}

@media (min-width: 960px) {
  .page-about .about-two--media {
    grid-template-columns: minmax(0, 1.22fr) minmax(0, 0.78fr);
    align-items: start;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-h1 {
    max-width: 13em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .cov-block,
  .page-about .tl-cue {
    transition: none;
  }

  .page-about .cov-block:hover {
    transform: none;
  }
}