.page-about {
  --about-paper-ink: #14203A;
  --about-paper-muted: #5A677C;
  --about-paper-line: rgba(11, 18, 32, .14);
  background: var(--sm-ink);
  color: var(--sm-text);
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about .sm-breadcrumb {
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(1.5rem, 4vw, 3rem) clamp(2.5rem, 6vw, 5rem);
  background:
    radial-gradient(120% 80% at 82% 0%, rgba(0, 230, 118, .16), transparent 62%),
    radial-gradient(90% 70% at 8% 100%, rgba(55, 240, 194, .10), transparent 66%);
  overflow: hidden;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
}

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

.page-about .about-hero h1 {
  margin: .75rem 0 1.25rem;
  font-family: var(--sm-font-display);
  font-size: clamp(2.1rem, 7.4vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -.01em;
  color: var(--sm-paper);
}

.page-about .about-hero__dek {
  max-width: 36em;
  margin: 0 0 1.75rem;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.8;
  color: var(--sm-text);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

.page-about .about-hero__index {
  display: grid;
  gap: .6rem;
  align-self: end;
  padding-top: 1rem;
  border-top: 2px solid var(--sm-signal);
}

.page-about .about-index__title {
  margin: 0 0 .25rem;
  font-family: var(--sm-font-mono);
  font-size: .75rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--sm-muted);
}

.page-about .about-index__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding-bottom: .55rem;
  border-bottom: 1px dashed var(--sm-line);
  font-size: .875rem;
}

.page-about .about-index__key {
  color: var(--sm-muted);
}

.page-about .about-index__val {
  font-family: var(--sm-font-mono);
  color: var(--sm-cyan);
  text-align: right;
}

/* ---------- Chapter frame ---------- */
.page-about .about-chapter {
  padding-block: clamp(2.75rem, 7vw, 5.5rem);
}

.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
}

.page-about .about-chapter__rail {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  min-width: 0;
}

.page-about .about-chapter__num {
  font-family: var(--sm-font-mono);
  font-size: clamp(2.4rem, 8vw, 4.4rem);
  line-height: .9;
  color: var(--sm-amber);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--sm-font-display);
  font-size: clamp(1.4rem, 3.4vw, 1.9rem);
  line-height: 1.25;
  color: var(--sm-paper);
}

.page-about .about-chapter__kicker {
  margin: 0;
  font-family: var(--sm-font-mono);
  font-size: .7rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--sm-muted);
}

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

.page-about .about-lead {
  max-width: 34em;
  margin: 0 0 1.75rem;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--sm-text);
}

/* Paper chapters */
.page-about .about-chapter--paper {
  background: var(--sm-paper);
  color: var(--about-paper-ink);
}

.page-about .about-chapter--paper .about-chapter__title {
  color: var(--about-paper-ink);
}

.page-about .about-chapter--paper .about-chapter__kicker {
  color: var(--about-paper-muted);
}

.page-about .about-chapter--paper .about-lead {
  color: #2B3852;
}

/* ---------- Origin ---------- */
.page-about .about-origin {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
}

.page-about .about-origin__text p {
  max-width: 34em;
  margin: 0 0 1.15rem;
  line-height: 1.85;
}

.page-about .about-origin__text p:first-child {
  font-size: 1.0625rem;
  color: var(--sm-paper);
}

.page-about .about-origin__media,
.page-about .about-workflow__media,
.page-about .about-team__media {
  margin: 0;
  border: 1px solid var(--sm-line);
  border-radius: var(--sm-radius);
  overflow: hidden;
  background: var(--sm-ink-2);
}

.page-about .about-origin__media img,
.page-about .about-workflow__media img {
  width: 100%;
  object-fit: cover;
}

.page-about .sm-media__cap {
  padding: .7rem 1rem;
  font-size: .78rem;
  line-height: 1.5;
  color: var(--sm-muted);
  border-top: 1px solid var(--sm-line);
}

/* ---------- Rules ---------- */
.page-about .about-rules {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.page-about .about-rule {
  padding: 1.4rem 1.35rem;
  background: #FBFAF6;
  border: 1px solid var(--about-paper-line);
  border-radius: var(--sm-radius);
  transition: border-color .25s var(--sm-ease), box-shadow .25s var(--sm-ease);
}

.page-about .about-rule:hover,
.page-about .about-rule:focus-within {
  border-color: var(--sm-signal);
  box-shadow: 0 18px 30px -26px rgba(11, 18, 32, .8);
}

.page-about .about-rule__title {
  margin: 1rem 0 .55rem;
  font-family: var(--sm-font-display);
  font-size: 1.125rem;
  color: var(--about-paper-ink);
}

.page-about .about-rule p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: #3A4763;
}

/* ---------- Workflow ---------- */
.page-about .about-workflow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .2rem;
}

.page-about .about-step {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr);
  gap: .9rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--sm-line);
}

.page-about .about-step__num {
  font-family: var(--sm-font-mono);
  font-size: .95rem;
  color: var(--sm-amber);
  padding-top: .15rem;
}

.page-about .about-step__title {
  margin: 0 0 .35rem;
  font-family: var(--sm-font-display);
  font-size: 1.0625rem;
  color: var(--sm-paper);
}

.page-about .about-step p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
}

/* ---------- Timeline ---------- */
.page-about .about-timeline {
  overflow-x: auto;
  padding-bottom: .75rem;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-timeline__track {
  display: flex;
  gap: .9rem;
  margin: 0;
  padding: 0 0 .35rem;
  list-style: none;
}

.page-about .about-node {
  position: relative;
  flex: 0 0 82%;
  max-width: 300px;
  padding: 1.15rem 1.15rem 1.3rem;
  background: #FBFAF6;
  border: 1px solid var(--about-paper-line);
  border-radius: var(--sm-radius);
  scroll-snap-align: start;
  transition: border-color .25s var(--sm-ease), box-shadow .25s var(--sm-ease);
}

.page-about .about-node::after {
  content: "";
  position: absolute;
  left: 1.15rem;
  bottom: -1px;
  width: 2.5rem;
  height: 3px;
  background: var(--sm-signal);
  transition: width .25s var(--sm-ease);
}

.page-about .about-node:hover,
.page-about .about-node:focus-within {
  border-color: var(--sm-signal);
  box-shadow: 0 20px 32px -28px rgba(11, 18, 32, .9);
}

.page-about .about-node:hover::after,
.page-about .about-node:focus-within::after {
  width: 3.5rem;
}

.page-about .about-node__ver {
  display: inline-flex;
  align-items: center;
  padding: .18rem .6rem;
  border-radius: var(--sm-pill);
  background: var(--sm-ink);
  color: var(--sm-signal);
  font-family: var(--sm-font-mono);
  font-size: .8rem;
  letter-spacing: .06em;
}

.page-about .about-node__year {
  display: block;
  margin-top: .6rem;
  font-family: var(--sm-font-mono);
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--about-paper-muted);
}

.page-about .about-node__title {
  margin: .35rem 0 .5rem;
  font-family: var(--sm-font-display);
  font-size: 1.0625rem;
  line-height: 1.35;
  color: var(--about-paper-ink);
}

.page-about .about-node p {
  margin: 0;
  font-size: .875rem;
  line-height: 1.75;
  color: #3A4763;
}

.page-about .about-timeline__hint {
  margin: .5rem 0 0;
  font-family: var(--sm-font-mono);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--about-paper-muted);
}

/* ---------- Team ---------- */
.page-about .sm-filter {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-bottom: 1.35rem;
}

.page-about .sm-filter__btn {
  padding: .5rem 1.05rem;
  border: 1px solid var(--sm-line);
  border-radius: var(--sm-pill);
  background: transparent;
  color: var(--sm-text);
  font-family: var(--sm-font-body);
  font-size: .875rem;
  cursor: pointer;
  transition: border-color .2s var(--sm-ease), color .2s var(--sm-ease), background .2s var(--sm-ease);
}

.page-about .sm-filter__btn:hover,
.page-about .sm-filter__btn:focus-visible {
  border-color: var(--sm-signal);
  color: var(--sm-signal);
  outline: none;
}

.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .9rem;
}

.page-about .about-team__card {
  padding: 1.2rem 1.3rem;
  background: var(--sm-ink-2);
  border-left: 3px solid var(--sm-cyan);
  border-radius: 0 var(--sm-radius-sm) var(--sm-radius-sm) 0;
  transition: border-color .25s var(--sm-ease), background .25s var(--sm-ease);
}

.page-about .about-team__card:hover {
  border-left-color: var(--sm-signal);
  background: #12203A;
}

.page-about .about-team__role {
  margin: 0 0 .4rem;
  font-family: var(--sm-font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--sm-cyan);
}

.page-about .about-team__title {
  margin: 0 0 .45rem;
  font-family: var(--sm-font-display);
  font-size: 1.0625rem;
  line-height: 1.35;
  color: var(--sm-paper);
}

.page-about .about-team__card p:last-child {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--sm-text);
}

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

.page-about .about-team__media img {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
}

/* ---------- Partners ---------- */
.page-about .about-partners__list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 0 0 1.6rem;
  padding: 0;
  list-style: none;
}

.page-about .about-recognition {
  padding: 1.4rem 1.35rem;
  border: 1px solid var(--sm-line);
  border-radius: var(--sm-radius);
  background: linear-gradient(135deg, rgba(0, 230, 118, .12), rgba(55, 240, 194, .04) 60%, transparent);
}

.page-about .about-recognition__label {
  margin: 0 0 .6rem;
  font-family: var(--sm-font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--sm-signal);
}

.page-about .about-recognition p {
  margin: 0 0 .85rem;
  font-size: .9375rem;
  line-height: 1.85;
}

.page-about .about-recognition__note {
  margin: 0;
  font-size: .875rem;
  color: var(--sm-muted);
}

.page-about .about-recognition__note a {
  color: var(--sm-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-recognition__note a:hover {
  color: var(--sm-signal);
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  background: var(--sm-paper);
  color: var(--about-paper-ink);
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  align-items: center;
}

.page-about .about-cta__title {
  margin: 0 0 .7rem;
  font-family: var(--sm-font-display);
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  line-height: 1.2;
  color: var(--about-paper-ink);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 34em;
  font-size: .9375rem;
  line-height: 1.85;
  color: #3A4763;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .85rem 1.25rem;
}

.page-about .about-cta__link {
  font-size: .9375rem;
  color: #22314C;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.page-about .about-cta__link:hover {
  color: #067A43;
}

/* ---------- Responsive ---------- */
@media (min-width: 640px) {
  .page-about .about-node {
    flex: 0 0 264px;
  }

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

@media (min-width: 760px) {
  .page-about .about-rules {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(2rem, 5vw, 4rem);
    align-items: end;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4.5rem);
    align-items: start;
  }

  .page-about .about-chapter__rail {
    position: sticky;
    top: 6.5rem;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 2.5rem;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1024px) {
  .page-about .about-origin {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 2.5rem;
    align-items: start;
  }

  .page-about .about-workflow {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    gap: 2.5rem;
    align-items: start;
  }

  .page-about .about-team__media img {
    max-height: 380px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rule,
  .page-about .about-node,
  .page-about .about-node::after,
  .page-about .about-team__card,
  .page-about .sm-filter__btn {
    transition: none;
  }
}
<<<END>>>