.page-about {
  --about-radius: 2px;
  --about-gap: clamp(20px, 4vw, 48px);
  background: var(--csd-ivory);
  color: var(--csd-ink);
  font-family: var(--csd-sans);
  overflow-x: hidden;
}

.page-about .about-topbar {
  padding-top: 16px;
}

.page-about .about-hero {
  position: relative;
  display: grid;
  gap: clamp(26px, 5vw, 56px);
  padding-top: clamp(22px, 4vw, 46px);
  padding-bottom: clamp(32px, 6vw, 76px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -20%;
  width: 78%;
  height: 340px;
  background: radial-gradient(ellipse at 70% 30%, rgba(212, 162, 76, 0.22), transparent 68%);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--csd-serif);
  font-weight: 800;
  color: var(--csd-green);
  letter-spacing: -0.01em;
}

.page-about .about-hero__lead {
  margin-top: 22px;
  max-width: 34em;
  color: var(--csd-ink);
}

.page-about .about-marks {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 4vw, 38px);
  padding: 0;
  list-style: none;
  background: var(--csd-line);
  border-top: 1px solid var(--csd-line-gold);
  border-bottom: 1px solid var(--csd-line-gold);
}

.page-about .about-marks__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: var(--csd-ivory);
}

.page-about .about-marks__num {
  font-family: var(--csd-mono);
  font-size: clamp(26px, 5vw, 38px);
  line-height: 1;
  font-weight: 700;
  color: var(--csd-red);
  font-variant-numeric: tabular-nums;
}

.page-about .about-marks__num em {
  font-style: normal;
  font-size: 0.6em;
  color: var(--csd-gold);
}

.page-about .about-marks__key {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: rgba(26, 23, 19, 0.66);
}

.page-about .about-cover {
  position: relative;
  margin: 0;
  padding: 10px;
  background: var(--csd-paper);
  border: 1px solid var(--csd-line-gold);
  box-shadow: var(--csd-shadow);
  z-index: 1;
}

.page-about .about-cover::after {
  content: "";
  position: absolute;
  inset: 10px -8px -8px 10px;
  border: 1px solid rgba(198, 40, 40, 0.28);
  z-index: -1;
}

.page-about .about-cover img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 5 / 7;
  object-fit: cover;
}

.page-about .about-cover__cap {
  margin-top: 10px;
  font-family: var(--csd-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--csd-red-deep);
  text-align: right;
}

.page-about .about-body {
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .about-side {
  position: sticky;
  top: 0;
  z-index: 5;
  padding: 10px 0 12px;
  margin-bottom: 8px;
  background: var(--csd-ivory);
  border-top: 1px solid var(--csd-line-gold);
  border-bottom: 1px solid var(--csd-line);
}

.page-about .about-side__label {
  margin: 0 0 8px;
  font-family: var(--csd-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--csd-gold);
  text-transform: uppercase;
}

.page-about .about-toc__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-toc__link {
  display: inline-block;
  white-space: nowrap;
  padding: 7px 12px;
  font-size: 13px;
  color: var(--csd-green);
  text-decoration: none;
  border: 1px solid var(--csd-line);
  border-radius: var(--about-radius);
  background: var(--csd-paper);
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  background: var(--csd-red);
  border-color: var(--csd-red);
  color: var(--csd-ivory);
}

.page-about .about-toc__link[aria-current="true"] {
  background: var(--csd-green);
  border-color: var(--csd-green);
  color: var(--csd-ivory);
}

.page-about .about-side__foot {
  display: none;
}

.page-about .about-flow {
  display: block;
}

.page-about .about-sec {
  padding-block: clamp(34px, 6vw, 62px);
  scroll-margin-top: 120px;
}

.page-about .about-flow > .about-sec + .about-sec {
  border-top: 1px solid var(--csd-line);
}

.page-about .about-sec__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-about .about-sec__no {
  flex: 0 0 auto;
  font-family: var(--csd-mono);
  font-size: 13px;
  line-height: 1;
  padding: 8px 7px;
  color: var(--csd-ivory);
  background: var(--csd-red);
  border-radius: var(--about-radius);
  box-shadow: 3px 3px 0 rgba(127, 16, 24, 0.32);
}

.page-about .about-sec__title {
  margin: 0;
  font-family: var(--csd-serif);
  font-weight: 700;
  font-size: clamp(24px, 4.4vw, 40px);
  line-height: 1.14;
  color: var(--csd-green);
  letter-spacing: -0.005em;
}

.page-about .about-sec__intro {
  margin: 0 0 22px;
  max-width: 40em;
  font-size: 15px;
  color: rgba(26, 23, 19, 0.7);
}

.page-about .about-sec__body {
  max-width: 40em;
}

.page-about .about-sec__body p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.78;
}

.page-about .about-sec__body p:last-child {
  margin-bottom: 0;
}

.page-about .about-sec__body a {
  color: var(--csd-red);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-lanes {
  display: grid;
  gap: 14px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-lanes__item {
  padding: 18px 18px 20px;
  background: var(--csd-paper);
  border-left: 3px solid var(--csd-gold);
  box-shadow: var(--csd-shadow);
}

.page-about .about-lanes__item strong {
  display: block;
  margin: 10px 0 6px;
  font-family: var(--csd-serif);
  font-size: 19px;
  color: var(--csd-green);
}

.page-about .about-lanes__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(26, 23, 19, 0.78);
}

.page-about .about-timeline {
  display: grid;
  gap: 0;
  margin-top: 8px;
  border-left: 2px solid var(--csd-line-gold);
  padding-left: 18px;
}

.page-about .about-tl {
  position: relative;
  padding: 6px 0;
}

.page-about .about-tl__trigger {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
  width: 100%;
  padding: 12px 40px 12px 0;
  background: transparent;
  border: 0;
  border-bottom: 1px dashed var(--csd-line);
  text-align: left;
  cursor: pointer;
  color: var(--csd-ink);
  font-family: inherit;
}

.page-about .about-tl__trigger:focus-visible {
  outline: 2px solid var(--csd-red);
  outline-offset: 3px;
}

.page-about .about-tl__dot {
  position: absolute;
  left: -25px;
  top: 20px;
  width: 12px;
  height: 12px;
  background: var(--csd-green);
  border: 2px solid var(--csd-gold);
  transform: rotate(45deg);
}

.page-about .about-tl[data-open="true"] .about-tl__dot {
  background: var(--csd-red);
}

.page-about .about-tl__year {
  font-family: var(--csd-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--csd-red);
  letter-spacing: 0.04em;
}

.page-about .about-tl__label {
  font-family: var(--csd-serif);
  font-size: 17px;
  font-weight: 700;
  color: var(--csd-green);
}

.page-about .about-tl__icon {
  position: absolute;
  right: 4px;
  top: 14px;
  font-family: var(--csd-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--csd-gold);
  transition: transform 0.3s ease;
}

.page-about .about-tl[data-open="true"] .about-tl__icon {
  transform: rotate(45deg);
}

.page-about .about-tl__panel {
  display: grid;
  grid-template-rows: 0fr;
  overflow: hidden;
  transition: grid-template-rows 0.36s ease;
}

.page-about .about-tl[data-open="true"] .about-tl__panel {
  grid-template-rows: 1fr;
}

.page-about .about-tl__inner {
  min-height: 0;
  overflow: hidden;
}

.page-about .about-tl__inner p {
  margin: 0;
  padding: 14px 0 18px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(26, 23, 19, 0.82);
}

.page-about .about-teamfig {
  margin: 24px 0 0;
  border: 1px solid var(--csd-line-gold);
  background: var(--csd-paper);
  padding: 8px;
}

.page-about .about-teamfig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-teamfig__cap {
  padding: 10px 4px 2px;
  font-family: var(--csd-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--csd-green);
}

.page-about .about-team {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__item {
  position: relative;
  padding: 18px 18px 18px 56px;
  background: var(--csd-ivory);
  border: 1px solid var(--csd-line);
  border-bottom: 2px solid var(--csd-gold-light);
}

.page-about .about-team__no {
  position: absolute;
  left: 16px;
  top: 18px;
  font-family: var(--csd-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--csd-gold);
}

.page-about .about-team__item h3 {
  margin: 0 0 8px;
  font-family: var(--csd-serif);
  font-size: 18px;
  color: var(--csd-green);
}

.page-about .about-team__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(26, 23, 19, 0.78);
}

.page-about .about-principles {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

.page-about .about-principle {
  perspective: 1400px;
  outline: none;
}

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

.page-about .about-principle__face {
  padding: 22px 20px 24px;
  border-radius: var(--about-radius);
}

.page-about .about-principle__front {
  background: var(--csd-green);
  color: var(--csd-ivory);
  border-bottom: 3px solid var(--csd-red);
}

.page-about .about-principle__no {
  display: block;
  font-family: var(--csd-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--csd-gold);
  margin-bottom: 10px;
}

.page-about .about-principle__front h3 {
  margin: 0 0 10px;
  font-family: var(--csd-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--csd-ivory);
}

.page-about .about-principle__front p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(248, 241, 228, 0.86);
}

.page-about .about-principle__hint {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--csd-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--csd-gold);
}

.page-about .about-principle__back {
  background: var(--csd-paper);
  border: 1px solid var(--csd-line-gold);
}

.page-about .about-principle__tag {
  display: inline-block;
  margin: 0 0 10px;
  padding: 3px 9px;
  font-family: var(--csd-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--csd-ink);
  background: var(--csd-gold-light);
}

.page-about .about-principle__back p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(26, 23, 19, 0.82);
}

.page-about .about-network__fig {
  margin: 0 0 24px;
  overflow: hidden;
  border-top: 2px solid var(--csd-gold);
  border-bottom: 2px solid var(--csd-gold);
}

.page-about .about-network__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.page-about .about-network__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-network__stats li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 16px 14px;
  background: var(--csd-paper);
  border-top: 2px solid var(--csd-green);
}

.page-about .about-network__num {
  font-family: var(--csd-mono);
  font-size: clamp(24px, 4.6vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--csd-red);
  font-variant-numeric: tabular-nums;
}

.page-about .about-network__num em {
  font-style: normal;
  font-size: 0.6em;
  color: var(--csd-gold);
}

.page-about .about-network__key {
  font-size: 12px;
  letter-spacing: 0.05em;
  color: rgba(26, 23, 19, 0.68);
}

.page-about .about-swatches {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-swatch {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px;
  border-radius: var(--about-radius);
  font-family: var(--csd-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.page-about .about-swatch small {
  font-size: 10px;
  letter-spacing: 0.04em;
  opacity: 0.82;
}

.page-about .about-swatch--red {
  background: var(--csd-red);
  color: var(--csd-ivory);
}

.page-about .about-swatch--gold {
  background: var(--csd-gold);
  color: var(--csd-ink-deep);
}

.page-about .about-swatch--green {
  background: var(--csd-green);
  color: var(--csd-ivory);
}

.page-about .about-swatch--ivory {
  background: var(--csd-ivory);
  color: var(--csd-ink);
  border: 1px solid var(--csd-line);
}

.page-about .about-symbols {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .about-symbols__item {
  padding: 18px 18px 20px;
  border-left: 3px solid var(--csd-red);
  background: rgba(232, 221, 203, 0.45);
}

.page-about .about-symbols__item h3 {
  margin: 0 0 8px;
  font-family: var(--csd-serif);
  font-size: 17px;
  color: var(--csd-green);
}

.page-about .about-symbols__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(26, 23, 19, 0.78);
}

.page-about .about-cta {
  padding-block: clamp(30px, 5vw, 56px);
}

.page-about .about-cta__card {
  position: relative;
  padding: clamp(24px, 4vw, 44px);
  background: var(--csd-ink-deep);
  color: var(--csd-ivory);
  border-radius: var(--about-radius);
  overflow: hidden;
}

.page-about .about-cta__card::before {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -90px;
  width: 260px;
  height: 260px;
  border: 1px solid rgba(212, 162, 76, 0.4);
  border-radius: 50%;
}

.page-about .about-cta__seal {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 16px;
  font-family: var(--csd-serif);
  font-size: 20px;
  color: var(--csd-ivory);
  background: var(--csd-red);
  border: 1px solid var(--csd-gold);
  border-radius: var(--about-radius);
}

.page-about .about-cta__title {
  margin: 0 0 12px;
  font-family: var(--csd-serif);
  font-size: clamp(22px, 3.8vw, 34px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--csd-ivory);
}

.page-about .about-cta__lead {
  margin: 0 0 22px;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(248, 241, 228, 0.82);
}

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

.page-about .about-cta__note {
  margin: 18px 0 0;
  font-size: 13px;
  color: rgba(248, 241, 228, 0.7);
}

.page-about .about-cta__note a {
  color: var(--csd-gold-light);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 700px) {
  .page-about .about-marks {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.72fr);
    align-items: end;
  }

  .page-about .about-cover {
    margin-bottom: 6px;
  }

  .page-about .about-body {
    display: grid;
    grid-template-columns: 214px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 76px);
    align-items: start;
  }

  .page-about .about-side {
    position: sticky;
    top: 104px;
    z-index: 1;
    padding: 4px 0 0;
    margin-bottom: 0;
    background: transparent;
    border-top: 0;
    border-bottom: 0;
  }

  .page-about .about-toc__list {
    display: grid;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-toc__link {
    display: block;
    white-space: normal;
    padding: 10px 12px;
    background: transparent;
    border: 0;
    border-left: 2px solid var(--csd-line);
    border-radius: 0;
    font-size: 14px;
  }

  .page-about .about-toc__link:hover,
  .page-about .about-toc__link:focus-visible {
    background: transparent;
    border-left-color: var(--csd-red);
    color: var(--csd-red);
  }

  .page-about .about-toc__link[aria-current="true"] {
    background: transparent;
    border-left-color: var(--csd-red);
    color: var(--csd-red-deep);
    font-weight: 700;
  }

  .page-about .about-side__foot {
    display: block;
    margin-top: 26px;
    padding-top: 18px;
    border-top: 1px solid var(--csd-line);
  }

  .page-about .about-side__foot p {
    margin: 0 0 10px;
    font-size: 12px;
    line-height: 1.6;
    color: rgba(26, 23, 19, 0.62);
  }

  .page-about .about-side__btn {
    display: inline-block;
    font-size: 13px;
    padding: 9px 14px;
  }

  .page-about .about-sec {
    scroll-margin-top: 130px;
  }

  .page-about .about-principles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-principle {
    min-height: 360px;
  }

  .page-about .about-principle__inner {
    position: relative;
    display: block;
    min-height: 360px;
    transform-style: preserve-3d;
    transition: transform 0.55s cubic-bezier(0.22, 0.61, 0.36, 1);
  }

  .page-about .about-principle__face {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
  }

  .page-about .about-principle__back {
    transform: rotateY(180deg);
    justify-content: center;
  }

  .page-about .about-principle:hover .about-principle__inner,
  .page-about .about-principle:focus-within .about-principle__inner,
  .page-about .about-principle:focus .about-principle__inner {
    transform: rotateY(180deg);
  }

  .page-about .about-principle__front p {
    flex: 1 1 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-principle__inner,
  .page-about .about-tl__icon,
  .page-about .about-tl__panel,
  .page-about .about-toc__link {
    transition: none;
  }
}
<<<END>>>