.page-about {
  --ab-pad: clamp(16px, 2.6vw, 28px);
  --ab-gap: clamp(18px, 3vw, 34px);
}

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(18px, 3.6vw, 36px) 0 clamp(34px, 6vw, 78px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -12%;
  right: -14%;
  bottom: -12%;
  width: min(78%, 760px);
  background: linear-gradient(155deg, rgba(122, 31, 61, 0.9) 0%, rgba(59, 42, 107, 0.55) 46%, rgba(6, 26, 21, 0) 80%);
  clip-path: polygon(32% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  z-index: -1;
  right: 8%;
  top: 6%;
  width: 1px;
  height: 62%;
  background: linear-gradient(180deg, transparent, var(--cyan), transparent);
  transform: rotate(7deg);
  opacity: 0.45;
  pointer-events: none;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 42px);
  margin-top: clamp(16px, 3vw, 28px);
}

.page-about .about-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 6.2vw, 60px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.012em;
  color: var(--mist);
  max-width: 15em;
}

.page-about .about-hero .lede {
  margin-top: 16px;
  max-width: 40em;
  color: var(--muted);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--glass-line);
  backdrop-filter: blur(6px);
  box-shadow: var(--shadow);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: clamp(14px, 2.4vw, 22px);
  background: rgba(8, 33, 26, 0.88);
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.8vw, 38px);
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  letter-spacing: -0.02em;
}

.page-about .about-stat__unit {
  font-size: 0.5em;
  margin-left: 3px;
  color: var(--muted);
  font-weight: 500;
}

.page-about .about-stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted);
  letter-spacing: 0.02em;
}

.page-about .about-body {
  display: grid;
  gap: var(--ab-gap);
  padding-bottom: clamp(40px, 7vw, 90px);
}

.page-about .about-toc {
  border-left: 2px solid var(--line);
  padding: 4px 0 4px 14px;
}

.page-about .about-toc__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-about .about-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.page-about .about-toc__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 5px 0;
  color: var(--mist);
  text-decoration: none;
  font-size: 15px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .about-toc__list a span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--amber);
}

.page-about .about-toc__list a:hover,
.page-about .about-toc__list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .about-toc__note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-toc__note a {
  color: var(--cyan);
}

.page-about .ab-chapter {
  padding-top: clamp(24px, 4vw, 40px);
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .ab-kicker {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--cyan);
}

.page-about .ab-chapter h2 {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(23px, 3.6vw, 36px);
  font-weight: 800;
  line-height: 1.18;
  color: var(--mist);
  max-width: 20em;
}

.page-about .ab-chapter p {
  color: var(--muted);
  line-height: 1.78;
  max-width: 42em;
}

.page-about .ab-facts {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.page-about .ab-fact {
  padding: 16px 18px;
  background: rgba(13, 42, 33, 0.72);
  border: 1px solid var(--line);
  border-left: 2px solid var(--line);
}

.page-about .ab-fact h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .ab-fact p {
  margin: 0;
  font-size: 15px;
}

.page-about .ab-fact--accent {
  border-left-color: var(--amber);
  background: linear-gradient(100deg, rgba(59, 42, 107, 0.5), rgba(13, 42, 33, 0.72));
}

.page-about .ab-timeline-wrap {
  display: grid;
  gap: 22px;
  margin-top: 22px;
}

.page-about .ab-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel-deep);
  overflow: hidden;
}

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

.page-about .ab-figure figcaption {
  padding: 10px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line-soft);
  letter-spacing: 0.02em;
}

.page-about .ab-timeline {
  display: grid;
  gap: 12px;
}

.page-about .ab-tl-item {
  position: relative;
  padding: 16px 16px 16px 20px;
  background: linear-gradient(100deg, rgba(13, 42, 33, 0.95), rgba(8, 33, 26, 0.68));
  border: 1px solid var(--line);
  border-left: 2px solid var(--line);
  transition: border-color 0.25s ease, background 0.25s ease;
  outline-offset: 2px;
}

.page-about .ab-tl-item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 21px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--line);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-about .ab-tl-item:hover,
.page-about .ab-tl-item:focus,
.page-about .ab-tl-item:focus-visible {
  border-color: var(--glass-line);
  border-left-color: var(--cyan);
  background: linear-gradient(100deg, rgba(13, 42, 33, 1), rgba(14, 48, 38, 0.9));
}

.page-about .ab-tl-item:hover::before,
.page-about .ab-tl-item:focus::before,
.page-about .ab-tl-item:focus-visible::before {
  border-color: var(--cyan);
  background: var(--cyan);
}

.page-about .ab-tl-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--amber);
  margin-bottom: 6px;
}

.page-about .ab-tl-item h3 {
  margin: 0 0 6px;
  font-size: clamp(17px, 2.4vw, 20px);
  font-weight: 700;
  color: var(--mist);
  line-height: 1.35;
}

.page-about .ab-tl-sum {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
}

.page-about .ab-tl-more {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transition: grid-template-rows 0.3s ease, opacity 0.3s ease, margin-top 0.3s ease;
}

.page-about .ab-tl-more p {
  overflow: hidden;
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
  opacity: 0.86;
}

.page-about .ab-tl-item:hover .ab-tl-more,
.page-about .ab-tl-item:focus .ab-tl-more,
.page-about .ab-tl-item:focus-visible .ab-tl-more {
  grid-template-rows: 1fr;
  opacity: 1;
  margin-top: 10px;
}

.page-about .ab-roles {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.page-about .ab-role {
  padding: var(--ab-pad);
  background: rgba(13, 42, 33, 0.78);
  border: 1px solid var(--line);
  border-top: 2px solid var(--amber);
}

.page-about .ab-role__idx {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
  border: 1px solid var(--line);
  padding: 2px 7px;
  margin-bottom: 10px;
}

.page-about .ab-role h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .ab-role p {
  margin: 0;
  font-size: 14.5px;
  max-width: none;
}

.page-about .ab-figure--team {
  margin-top: 16px;
}

.page-about .ab-boards {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.page-about .ab-board {
  border: 1px solid var(--line-soft);
  background: rgba(8, 33, 26, 0.7);
}

.page-about .ab-board summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--mist);
  line-height: 1.5;
}

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

.page-about .ab-board summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cyan);
  flex: none;
}

.page-about .ab-board[open] summary::after {
  content: "－";
}

.page-about .ab-board summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-about .ab-board__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--amber);
  letter-spacing: 0.14em;
  flex: none;
}

.page-about .ab-board__body {
  padding: 12px 16px 16px;
  border-top: 1px dashed var(--line-soft);
}

.page-about .ab-board__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  max-width: 40em;
}

.page-about .ab-eco {
  display: grid;
  gap: 20px;
  margin-top: 22px;
  align-items: center;
}

.page-about .ab-eco__side {
  display: grid;
  gap: 16px;
}

.page-about .ab-net {
  width: 100%;
  height: auto;
  max-width: 340px;
  margin: 0 auto;
  display: block;
}

.page-about .ab-eco__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .ab-eco__stat {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 12px 14px;
  background: rgba(8, 33, 26, 0.9);
}

.page-about .ab-eco__num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.6vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .ab-eco__unit {
  font-size: 0.52em;
  margin-left: 2px;
  color: var(--muted);
}

.page-about .ab-eco__label {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--muted);
}

.page-about .ab-award {
  display: grid;
  gap: 10px;
  margin-top: 20px;
  padding: 16px 18px;
  background: linear-gradient(100deg, rgba(122, 31, 61, 0.55), rgba(13, 42, 33, 0.7));
  border: 1px solid rgba(122, 31, 61, 0.8);
}

.page-about .ab-award .tag {
  justify-self: start;
}

.page-about .ab-award p {
  margin: 0;
  font-size: 14.5px;
  color: var(--mist);
  opacity: 0.9;
  max-width: 44em;
}

.page-about .ab-chapter--last {
  border-top: 1px solid var(--glass-line);
}

.page-about .ab-cta {
  display: grid;
  gap: 20px;
  margin-top: 20px;
  padding: var(--ab-pad);
  background: linear-gradient(150deg, rgba(13, 42, 33, 0.96), rgba(59, 42, 107, 0.42));
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
}

.page-about .ab-cta__main h3 {
  margin: 0 0 10px;
  font-size: clamp(18px, 2.6vw, 22px);
  font-weight: 700;
  color: var(--mist);
  line-height: 1.35;
}

.page-about .ab-cta__main p {
  margin: 0;
  font-size: 15px;
  max-width: 38em;
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

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

.page-about .ab-cta__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  color: var(--amber);
}

.page-about .ab-cta__line {
  margin: 0 0 6px;
  font-size: 14.5px;
  color: var(--mist);
  word-break: break-all;
}

.page-about .ab-cta__line a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 208, 0.4);
}

.page-about .ab-cta__line a:hover,
.page-about .ab-cta__line a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-about .ab-cta__note {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.7;
  max-width: none;
}

.page-about .ab-cta__more {
  display: inline-block;
  margin-top: 12px;
  font-size: 14px;
  color: var(--cyan);
  text-decoration: none;
}

.page-about .ab-cta__more:hover,
.page-about .ab-cta__more:focus-visible {
  text-decoration: underline;
}

@media (min-width: 640px) {
  .page-about .ab-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

  .page-about .ab-award {
    grid-template-columns: auto 1fr;
    align-items: start;
    gap: 14px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }

  .page-about .ab-timeline-wrap {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
    gap: 26px;
  }

  .page-about .ab-figure {
    position: sticky;
    top: 24px;
  }

  .page-about .ab-eco {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 30px;
  }

  .page-about .ab-cta {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    gap: 28px;
    padding: clamp(22px, 3vw, 34px);
  }

  .page-about .ab-cta__side {
    padding: 0 0 0 22px;
    border-top: 0;
    border-left: 1px solid var(--line-soft);
  }
}

@media (min-width: 1080px) {
  .page-about .about-body {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(28px, 3.6vw, 56px);
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: 24px;
    padding-left: 16px;
  }

  .page-about .about-toc__list {
    flex-direction: column;
    gap: 2px;
  }

  .page-about .about-toc__list a {
    display: flex;
    padding: 7px 0;
  }

  .page-about .ab-figure {
    position: sticky;
    top: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-tl-more {
    grid-template-rows: 1fr;
    opacity: 1;
    margin-top: 10px;
    transition: none;
  }

  .page-about .ab-tl-item,
  .page-about .ab-tl-item::before,
  .page-about .ab-tl-more,
  .page-about .about-toc__list a {
    transition: none;
  }
}
<<<END>>>