.page-about {
  --about-index-width: 196px;
  --about-paper-muted: #5b5448;
  background: var(--bg);
  color: var(--text);
}

.page-about .about-crumbs-wrap {
  padding-top: clamp(1rem, 3vw, 1.75rem);
}

.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-crumbs .breadcrumbs__item {
  color: var(--mist);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}

.page-about .about-crumbs a.breadcrumbs__item:hover {
  color: var(--cyan);
}

.page-about .about-crumbs .breadcrumbs__item:not(:first-child)::before {
  content: "/";
  margin-right: 0.35rem;
  color: var(--ink-700);
}

.page-about .about-crumbs .breadcrumbs__item[aria-current="page"] {
  color: var(--text);
}

.page-about .about-hero {
  position: relative;
  padding-block: clamp(2rem, 5vw, 4.5rem);
  background:
    radial-gradient(circle at 78% 10%, rgba(53, 230, 208, 0.12), transparent 42%),
    radial-gradient(circle at 10% 90%, rgba(255, 138, 61, 0.07), transparent 34%);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.page-about .about-hero__intro {
  display: grid;
  gap: 1.1rem;
  max-width: 46rem;
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 10vw, 4.7rem);
  line-height: 0.98;
  letter-spacing: -0.035em;
  font-weight: 800;
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 36rem;
  font-size: clamp(1.06rem, 2.2vw, 1.25rem);
  line-height: 1.8;
  color: var(--cyan-soft);
}

.page-about .about-hero__body {
  margin: 0;
  max-width: 40rem;
  color: var(--mist);
  font-size: 0.98rem;
  line-height: 1.8;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.4rem;
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.4rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  color: var(--mist);
  font-size: 0.8rem;
}

.page-about .about-hero__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
}

.page-about .about-hero__facts span {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--cyan);
}

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

.page-about .about-hero__figure .figure__media {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--line-strong);
  background: linear-gradient(145deg, var(--ink-800), var(--ink-900));
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

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

.page-about .figure__caption {
  margin-top: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-layout {
  display: grid;
  gap: 0;
  padding-bottom: clamp(3rem, 8vw, 7rem);
}

.page-about .about-index {
  position: sticky;
  top: var(--header-h);
  z-index: 6;
  margin: 0;
  padding: 0.8rem 0;
  background: rgba(11, 27, 43, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

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

.page-about .about-index__list {
  display: flex;
  gap: 1rem;
  margin: 0;
  padding: 0 0 0.15rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  white-space: nowrap;
  padding: 0.35rem 0;
  color: var(--mist);
  text-decoration: none;
  font-size: 0.82rem;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-index__link:hover {
  color: var(--cyan);
  border-bottom-color: currentColor;
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--cyan);
  letter-spacing: 0.08em;
}

.page-about .about-body {
  min-width: 0;
}

.page-about .about-section {
  padding-block: clamp(2.5rem, 6vw, 5rem);
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 4rem);
}

.page-about .about-section:first-child {
  border-top: 0;
}

.page-about .about-section__head {
  display: grid;
  gap: 0.65rem;
  max-width: 46rem;
}

.page-about .about-section__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .about-section__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 5vw, 3rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 800;
  text-wrap: balance;
}

.page-about .about-section__lead {
  margin: 1.3rem 0 0;
  max-width: 42rem;
  color: var(--cyan-soft);
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  line-height: 1.7;
}

.page-about .about-section__text {
  margin: 0.9rem 0 0;
  max-width: 72ch;
  color: var(--mist);
  font-size: 1rem;
  line-height: 1.85;
}

.page-about .about-section__text a {
  color: var(--cyan);
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 0.2em;
}

.page-about .about-section__text a:hover {
  text-decoration-color: currentColor;
}

.page-about .about-principles {
  margin-top: 1.5rem;
}

.page-about .principle {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: 0.4rem 1rem;
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
  transition: background 0.2s var(--ease);
}

.page-about .principle:hover {
  background: rgba(53, 230, 208, 0.03);
}

.page-about .principle__index {
  padding-top: 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .principle h3 {
  margin: 0;
  font-size: 1.15rem;
  line-height: 1.4;
  color: var(--text);
}

.page-about .principle p {
  margin: 0.45rem 0 0;
  max-width: 64ch;
  color: var(--mist);
  font-size: 0.96rem;
  line-height: 1.75;
}

.page-about .principle__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.75rem;
  color: var(--cyan);
  font-size: 0.9rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .principle__link:hover {
  border-bottom-color: currentColor;
}

.page-about .about-system {
  display: grid;
  gap: 1.75rem;
  margin-top: 1.5rem;
}

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

.page-about .about-system__figure .figure__media {
  aspect-ratio: 5 / 3;
  overflow: hidden;
  border-radius: var(--r-md);
  border: 1px solid var(--line-strong);
  background: linear-gradient(145deg, var(--ink-800), var(--ink-900));
}

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

.page-about .channel {
  display: grid;
  grid-template-columns: 2.3rem minmax(0, 1fr);
  gap: 0.25rem 0.9rem;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
}

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

.page-about .channel__num {
  padding-top: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .channel h3 {
  margin: 0;
  font-size: 1.02rem;
  line-height: 1.4;
}

.page-about .channel__title-link {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .channel__title-link:hover {
  color: var(--cyan);
  border-bottom-color: currentColor;
}

.page-about .channel p {
  margin: 0.25rem 0 0;
  color: var(--mist);
  font-size: 0.92rem;
  line-height: 1.7;
}

.page-about .about-version {
  display: grid;
  gap: 1.75rem;
  margin-top: 1.6rem;
}

.page-about .version-panel {
  min-width: 0;
}

.page-about .version-checks {
  margin-top: 1rem;
}

.page-about .version-check {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.75rem;
  align-items: start;
  padding: 0.95rem 0;
  border-top: 1px solid var(--line);
}

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

.page-about .version-check h3 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.4;
}

.page-about .version-check p {
  margin: 0.3rem 0 0;
  color: var(--mist);
  font-size: 0.93rem;
  line-height: 1.7;
}

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

.page-about .about-version__figure .figure__media {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border-radius: var(--r-md);
  border: 1px solid var(--line-strong);
  background: linear-gradient(145deg, var(--ink-800), var(--ink-900));
}

.page-about .about-section--paper {
  margin-block: 1.5rem;
  padding: clamp(1.5rem, 4vw, 3.2rem);
  border-top: 0;
  border-radius: var(--r-lg);
  background: var(--paper);
  color: var(--paper-ink);
}

.page-about .about-section--paper .about-section__title {
  color: var(--paper-ink);
}

.page-about .about-section--paper .about-section__lead {
  color: #3d372d;
}

.page-about .about-section--paper .about-section__text {
  color: var(--about-paper-muted);
}

.page-about .about-section--paper .about-section__num {
  color: var(--orange-deep);
}

.page-about .about-stages {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.page-about .stage {
  padding: clamp(1.1rem, 3vw, 1.8rem);
  border-radius: 28px 10px 28px 10px;
  background: var(--ink-800);
  color: var(--text);
  box-shadow: 0 18px 40px rgba(11, 27, 43, 0.12);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .stage:hover {
  transform: translateY(-2px);
  box-shadow: 0 22px 50px rgba(11, 27, 43, 0.18);
}

.page-about .stage:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-about .stage--2 {
  background: var(--ink-700);
}

.page-about .stage--3 {
  background: linear-gradient(135deg, var(--orange), var(--orange-deep));
  color: var(--ink-900);
}

.page-about .stage__num {
  display: block;
  margin-bottom: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .stage--3 .stage__num {
  color: rgba(11, 27, 43, 0.65);
}

.page-about .stage h3 {
  margin: 0;
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  line-height: 1.35;
}

.page-about .stage p {
  margin: 0.55rem 0 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .stage--2 p {
  color: rgba(247, 251, 253, 0.78);
}

.page-about .stage--3 p {
  color: rgba(11, 27, 43, 0.82);
}

.page-about .about-team {
  margin-top: 1.5rem;
}

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

.page-about .team-role {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: 0.4rem 0.9rem;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
}

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

.page-about .team-role__step {
  padding-top: 0.25rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cyan);
}

.page-about .team-role h3 {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.4;
}

.page-about .team-role p {
  margin: 0.3rem 0 0;
  color: var(--mist);
  font-size: 0.94rem;
  line-height: 1.75;
}

.page-about .about-team__note {
  margin: 1.5rem 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--orange);
  color: var(--mist);
  font-size: 0.94rem;
  line-height: 1.8;
  max-width: 70ch;
}

.page-about .about-why-grid {
  display: grid;
  gap: 0;
  margin-top: 1.5rem;
}

.page-about .why-item {
  padding: 1.2rem 0;
  border-top: 1px solid var(--line);
}

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

.page-about .why-item h3 {
  margin: 0;
  color: var(--cyan);
  font-size: 1.05rem;
  line-height: 1.4;
}

.page-about .why-item p {
  margin: 0.4rem 0 0;
  color: var(--mist);
  font-size: 0.94rem;
  line-height: 1.75;
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.7rem;
}

@media (min-width: 640px) {
  .page-about .about-why-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 2rem;
  }

  .page-about .about-why-grid .why-item:nth-child(1),
  .page-about .about-why-grid .why-item:nth-child(2) {
    border-top: 1px solid var(--line);
  }
}

@media (min-width: 720px) {
  .page-about .stage--2 {
    width: 94%;
    margin-left: auto;
  }

  .page-about .stage--3 {
    width: 88%;
    margin-left: auto;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.8fr);
  }

  .page-about .about-system {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .about-version {
    grid-template-columns: minmax(0, 1fr) 260px;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-index-width) minmax(0, 1fr);
    gap: clamp(2.5rem, 6vw, 5.5rem);
    align-items: start;
  }

  .page-about .about-index {
    top: calc(var(--header-h) + 2rem);
    padding: 0;
    background: transparent;
    border-bottom: 0;
    backdrop-filter: none;
  }

  .page-about .about-index__title {
    display: block;
    margin: 0 0 1rem;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--cyan);
  }

  .page-about .about-index__list {
    display: block;
    overflow: visible;
  }

  .page-about .about-index__link {
    display: flex;
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--line);
    font-size: 0.86rem;
  }

  .page-about .about-index__list li:last-child .about-index__link {
    border-bottom: 0;
  }

  .page-about .about-section {
    padding-block: clamp(3rem, 6vw, 5.5rem);
  }
}

@media (min-width: 1100px) {
  .page-about .about-version {
    grid-template-columns: minmax(0, 1fr) 320px;
  }
}
<<<END>>>