.page-about {
  --about-ink-soft: #3a3532;
  --about-line: var(--c-paper-line);
  background: var(--c-paper);
  color: var(--c-ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about [id] {
  scroll-margin-top: calc(var(--header-h) + 1.2rem);
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: clamp(1.2rem, 4vw, 2rem) 0 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-warm-gray);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--c-gold);
}

.page-about .breadcrumb a {
  color: var(--c-warm-gray);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .breadcrumb a:hover {
  color: var(--c-red);
  border-bottom-color: var(--c-gold);
}

/* ---------- hero ---------- */
.page-about .about-hero {
  padding-top: calc(var(--header-h) + clamp(1rem, 3vw, 1.6rem));
  padding-bottom: clamp(2.4rem, 6vw, 4.2rem);
  background:
    radial-gradient(110% 80% at 100% 0%, rgba(184, 138, 68, 0.12), transparent 62%),
    var(--c-paper);
  border-bottom: 1px solid var(--about-line);
  position: relative;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-red) 0%, var(--c-gold) 45%, transparent 100%);
  opacity: 0.7;
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.8rem, 4vw, 3rem);
}

.page-about .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-gold);
}

.page-about .eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: currentColor;
}

.page-about .eyebrow--light {
  color: var(--c-gold-light);
}

.page-about .about-h1 {
  margin: 0.7rem 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.05rem, 7.2vw, 4.3rem);
  line-height: 1.1;
  letter-spacing: 0.01em;
}

.page-about .about-h1__mark {
  color: var(--c-red);
  background-image: linear-gradient(transparent 72%, rgba(184, 138, 68, 0.35) 72%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

.page-about .about-hero__text {
  max-width: 38em;
  margin: 0;
  font-size: clamp(0.98rem, 2.3vw, 1.1rem);
  line-height: 1.95;
  color: var(--about-ink-soft);
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2.2rem;
  margin-top: 1.8rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--about-line);
}

.page-about .about-meta__item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.page-about .about-meta__num {
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 3.2vw, 1.6rem);
  letter-spacing: 0.06em;
  color: var(--c-red);
  line-height: 1;
}

.page-about .about-meta__label {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-warm-gray);
}

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

.page-about .about-index a {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  padding: 0.72rem 0;
  border-top: 1px solid var(--about-line);
  text-decoration: none;
  color: var(--c-ink);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  transition: color 0.22s var(--ease), padding-left 0.22s var(--ease);
}

.page-about .about-index li:last-child a {
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-index a:hover {
  color: var(--c-red);
  padding-left: 0.4rem;
}

.page-about .about-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--c-gold);
}

/* ---------- generic blocks ---------- */
.page-about .about-block {
  padding-block: clamp(2.8rem, 7vw, 5.4rem);
}

.page-about .about-block--versions {
  background: var(--c-cream);
  border-block: 1px solid var(--about-line);
}

.page-about .about-block--team {
  background: var(--c-red-deep);
  color: var(--c-cream);
}

.page-about .about-block--eco {
  background: var(--c-celadon-light);
}

.page-about .about-h2 {
  margin: 0.7rem 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.45rem, 4.4vw, 2.35rem);
  line-height: 1.28;
  letter-spacing: 0.01em;
}

.page-about .about-sub {
  margin: 0 0 0.8rem;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.page-about .prose {
  max-width: 38em;
  margin: 0 0 1rem;
  font-size: clamp(0.94rem, 2.2vw, 1rem);
  line-height: 1.9;
  color: var(--about-ink-soft);
}

.page-about .about-figure {
  margin: 0;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--about-line);
  background: var(--c-paper-line);
  aspect-ratio: 16 / 9;
}

.page-about .about-figure--3x2 {
  aspect-ratio: 3 / 2;
}

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

.page-about .about-figure__cap {
  margin: 0;
  padding-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  line-height: 1.7;
  color: var(--c-warm-gray);
}

.page-about .about-block--team .about-figure__cap {
  color: rgba(246, 240, 228, 0.6);
}

.page-about .about-block--team .about-figure {
  border-color: rgba(227, 201, 143, 0.35);
  background: rgba(246, 240, 228, 0.08);
}

/* ---------- origin ---------- */
.page-about .about-origin__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
}

.page-about .about-quote {
  margin: 1.4rem 0 0;
  padding: 0.2rem 0 0.2rem 1.1rem;
  border-left: 3px solid var(--c-gold);
  font-family: var(--font-display);
  font-size: clamp(1rem, 2.6vw, 1.15rem);
  line-height: 1.7;
  color: var(--c-red);
}

/* ---------- versions ---------- */
.page-about .about-versions__head {
  position: relative;
}

.page-about .about-seal {
  display: block;
  width: 30px;
  height: 30px;
  margin-bottom: 0.9rem;
  color: var(--c-gold);
  opacity: 0.85;
}

.page-about .about-note {
  display: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--c-warm-gray);
  writing-mode: vertical-rl;
  position: absolute;
  right: 0;
  top: 0.4rem;
}

.page-about .about-versions__body {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.8rem);
  margin-top: clamp(1.6rem, 4vw, 2.4rem);
}

.page-about .about-rail__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
  padding: 0.4rem 0.8rem;
  border: 1px solid var(--c-gold-light);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-ink);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-rail__link:hover {
  border-color: var(--c-red);
  color: var(--c-red);
}

.page-about .about-rail__link[data-active] {
  border-color: var(--c-red);
  background: rgba(142, 31, 43, 0.08);
  color: var(--c-red);
}

.page-about .about-rail__figure {
  margin-top: 1.1rem;
}

.page-about .about-versions__list {
  display: grid;
  gap: 0;
}

.page-about .about-version {
  display: grid;
  gap: 0.7rem;
  padding: clamp(1.3rem, 3.4vw, 2.2rem) 0;
  border-top: 1px solid var(--c-gold-light);
}

.page-about .about-version:first-child {
  border-top: 2px solid var(--c-gold);
  padding-top: clamp(1.1rem, 3vw, 1.8rem);
}

.page-about .about-version__no {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.3rem, 8vw, 3.6rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--c-red);
}

.page-about .about-version__year {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-gold);
}

.page-about .about-version__title {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2.8vw, 1.35rem);
  font-weight: 800;
  line-height: 1.35;
}

.page-about .about-version .prose {
  font-size: 0.94rem;
  margin-bottom: 0.75rem;
}

.page-about .about-version__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0.9rem 0 0;
}

.page-about .about-version__tags .tag {
  font-size: 11px;
  letter-spacing: 0.06em;
}

.page-about .about-version__more {
  margin: 0.9rem 0 0;
}

.page-about .about-version__link {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-red);
  text-decoration: none;
  border-bottom: 1px solid var(--c-gold);
  padding-bottom: 0.2rem;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-version__link:hover {
  color: var(--c-red-deep);
  border-bottom-color: var(--c-red);
}

/* ---------- team ---------- */
.page-about .about-team__head {
  max-width: 46em;
}

.page-about .about-team__lead {
  margin: 0;
  font-size: clamp(0.95rem, 2.2vw, 1.02rem);
  line-height: 1.9;
  color: rgba(246, 240, 228, 0.82);
}

.page-about .about-team__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 3rem);
  margin-top: clamp(1.6rem, 4vw, 2.6rem);
  align-items: start;
}

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

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

.page-about .about-role {
  padding: 0.95rem 0;
  border-top: 1px solid rgba(227, 201, 143, 0.28);
  transition: background 0.25s var(--ease), padding-left 0.25s var(--ease);
}

.page-about .about-role:last-child {
  border-bottom: 1px solid rgba(227, 201, 143, 0.28);
}

.page-about .about-role:hover {
  background: rgba(227, 201, 143, 0.09);
  padding-left: 0.75rem;
}

.page-about .about-role__head {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
}

.page-about .about-role__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--c-gold-light);
}

.page-about .about-role h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--c-cream);
}

.page-about .about-role p {
  margin: 0.4rem 0 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: rgba(246, 240, 228, 0.75);
}

/* ---------- principles ---------- */
.page-about .about-principles__head {
  max-width: 46em;
}

.page-about .about-principles__list {
  display: grid;
  gap: 0;
  margin-top: clamp(1.4rem, 3.6vw, 2.2rem);
}

.page-about .about-principle {
  display: grid;
  gap: 0.45rem;
  padding: clamp(1.05rem, 3vw, 1.55rem) 0;
  border-top: 1px solid var(--about-line);
  position: relative;
  transition: padding-left 0.25s var(--ease);
}

.page-about .about-principle:last-child {
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-principle::before {
  content: "";
  position: absolute;
  left: 0;
  top: -1px;
  width: 0;
  height: 1px;
  background: var(--c-red);
  transition: width 0.35s var(--ease);
}

.page-about .about-principle:hover::before {
  width: 64px;
}

.page-about .about-principle:hover {
  padding-left: 0.5rem;
}

.page-about .about-principle__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--c-gold);
}

.page-about .about-principle h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.page-about .about-principle p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.82;
  color: var(--about-ink-soft);
}

/* ---------- ecosystem ---------- */
.page-about .about-eco__head {
  max-width: 46em;
}

.page-about .about-eco__head .prose {
  color: #2f4038;
}

.page-about .about-eco__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.6rem);
  margin-top: clamp(1.6rem, 4vw, 2.4rem);
}

.page-about .about-rhythm {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-rhythm li {
  display: grid;
  grid-template-columns: 3.2rem minmax(0, 1fr);
  gap: 0.9rem;
  align-items: baseline;
  padding: 0.85rem 0;
  border-top: 1px solid rgba(62, 107, 90, 0.28);
  font-size: 0.93rem;
  line-height: 1.8;
  color: #2f4038;
}

.page-about .about-rhythm li:last-child {
  border-bottom: 1px solid rgba(62, 107, 90, 0.28);
}

.page-about .about-rhythm__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-celadon);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(62, 107, 90, 0.28);
  border: 1px solid rgba(62, 107, 90, 0.28);
}

.page-about .about-stat {
  background: var(--c-celadon-light);
  padding: 1.05rem 0.9rem;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.25rem, 3.4vw, 1.65rem);
  letter-spacing: 0.04em;
  line-height: 1.1;
  color: var(--c-celadon);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 0.35rem;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: #3d4d46;
}

.page-about .about-eco__note {
  margin: 1.1rem 0 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: #2f4038;
}

.page-about .about-eco__note a {
  color: var(--c-red);
  text-decoration: none;
  border-bottom: 1px solid var(--c-gold);
}

.page-about .about-eco__note a:hover {
  color: var(--c-red-deep);
}

/* ---------- start ---------- */
.page-about .about-start__grid {
  display: grid;
  gap: clamp(1.6rem, 4vw, 2.8rem);
  align-items: start;
}

.page-about .about-steps {
  list-style: none;
  counter-reset: step;
  margin: 1.3rem 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-steps li {
  position: relative;
  padding: 0.8rem 0 0.8rem 2.7rem;
  border-top: 1px dashed var(--about-line);
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .about-steps li:last-child {
  border-bottom: 1px dashed var(--about-line);
}

.page-about .about-steps li::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.85rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-gold);
}

.page-about .about-start__panel {
  display: grid;
  gap: 0.75rem;
  align-content: start;
  padding: clamp(1.3rem, 4vw, 2rem);
  border: 1px solid var(--c-red);
  border-top-width: 4px;
  background: var(--c-cream);
}

.page-about .about-start__panel-title {
  margin: 0 0 0.2rem;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--c-gold);
}

.page-about .about-start__panel .btn {
  display: block;
  text-align: center;
  text-decoration: none;
}

.page-about .about-start__note {
  margin: 0.4rem 0 0;
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--c-warm-gray);
}

.page-about .about-start__note a {
  color: var(--c-red);
  text-decoration: none;
  border-bottom: 1px solid var(--c-gold-light);
}

.page-about .about-start__note a:hover {
  border-bottom-color: var(--c-red);
}

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

  .page-about .about-principle {
    grid-template-columns: 3.5rem minmax(0, 12rem) minmax(0, 1fr);
    gap: 0.6rem 1.2rem;
    align-items: baseline;
  }

  .page-about .about-version {
    grid-template-columns: 6rem minmax(0, 1fr);
    gap: 0.8rem 1.6rem;
    align-items: start;
  }
}

/* ---------- desktop ---------- */
@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.85fr);
    align-items: end;
  }

  .page-about .about-index {
    border-left: 1px solid var(--about-line);
    padding-left: clamp(1.2rem, 3vw, 2.2rem);
  }

  .page-about .about-origin__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }

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

  .page-about .about-start__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

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

  .page-about .about-versions__body {
    grid-template-columns: minmax(0, 210px) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 2rem);
  }

  .page-about .about-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0;
  }

  .page-about .about-rail__link {
    width: 100%;
    border: 0;
    border-left: 2px solid var(--c-paper-line);
    border-radius: 0;
    padding: 0.6rem 0 0.6rem 1rem;
    justify-content: flex-start;
  }

  .page-about .about-rail__link[data-active] {
    border-left-color: var(--c-red);
    background: rgba(142, 31, 43, 0.06);
  }

  .page-about .about-rail__figure .about-figure {
    aspect-ratio: 1 / 1;
  }
}

@media (min-width: 1100px) {
  .page-about .about-version {
    grid-template-columns: 7rem minmax(0, 1fr);
    gap: 0.9rem 2.4rem;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}
<<<PAGE_CSS_END>>>