.page-about{
  --about-text: rgba(244, 241, 233, .84);
  --about-soft: rgba(159, 191, 191, .18);
  --about-gap: clamp(20px, 4vw, 40px);
  color: var(--shell);
  padding: clamp(19px, 4vw, 34px) 0 clamp(48px, 7vw, 96px);
  background:
    radial-gradient(760px 380px at 88% 0%, rgba(69, 224, 206, .10), transparent 62%),
    radial-gradient(640px 360px at 2% 44%, rgba(255, 106, 69, .07), transparent 60%);
}

.page-about a{
  color: var(--glow);
  text-decoration: none;
  border-bottom: 1px solid rgba(69, 224, 206, .35);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.page-about a:hover{
  color: var(--shell);
  border-bottom-color: var(--coral);
}
.page-about a:focus-visible{
  outline: 2px solid var(--glow);
  outline-offset: 3px;
  border-radius: 2px;
}

.page-about .about-crumbs{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(20px, 4vw, 34px);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--clay);
}
.page-about .about-crumbs li + li::before{
  content: "/";
  margin-right: 8px;
  color: var(--deep);
}
.page-about .about-crumbs a{
  color: var(--mist);
  border-bottom: 1px solid transparent;
}
.page-about .about-crumbs [aria-current="page"]{
  color: var(--shell);
}

.page-about .eyebrow{
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--mist);
  margin: 0 0 14px;
  padding-left: 22px;
  position: relative;
}
.page-about .eyebrow::before{
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 14px;
  height: 2px;
  background: var(--coral);
}

.page-about .about-hero{
  position: relative;
  padding-bottom: clamp(24px, 4vw, 44px);
}
.page-about .about-hero::after{
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 32%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--deep));
}

.page-about .about-title{
  margin: 0 0 18px;
  font-size: clamp(30px, 6.4vw, 62px);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--shell);
  max-width: 16ch;
}

.page-about .about-lede{
  margin: 0 0 clamp(24px, 4vw, 36px);
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--about-text);
}

.page-about .about-stats{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-soft);
  border: 1px solid var(--about-soft);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-bottom: clamp(26px, 4vw, 44px);
}
.page-about .stat{
  background: var(--tide);
  padding: 16px 18px;
}
.page-about .stat-num{
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.6vw, 34px);
  letter-spacing: .06em;
  line-height: 1.1;
  color: var(--glow);
}
.page-about .stat-label{
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
}

.page-about .about-figure{
  margin: 0;
}
.page-about .about-figure .media-frame{
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--about-soft);
  background: var(--tide);
}
.page-about .about-figure img{
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .media-caption{
  display: block;
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--clay);
}

.page-about .chapter{
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px var(--about-gap);
  padding: clamp(30px, 5vw, 56px) 0 clamp(26px, 4vw, 44px);
}
.page-about .chapter::before{
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 64px;
  height: 1px;
  background: var(--deep);
}
.page-about .chapter-no{
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.4vw, 48px);
  line-height: 1;
  letter-spacing: .04em;
  color: var(--glow);
}
.page-about .chapter-head{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
  margin-bottom: 16px;
}
.page-about .chapter-title{
  margin: 0;
  font-size: clamp(22px, 3.2vw, 32px);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--shell);
}
.page-about .chapter-aside{
  margin: 0 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--clay);
  border-bottom: 1px dashed rgba(160, 139, 120, .45);
  padding-bottom: 2px;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}
.page-about .chapter:hover .chapter-aside{
  color: var(--mist);
  border-bottom-color: rgba(159, 191, 191, .55);
}
.page-about .chapter-body > p{
  margin: 0 0 14px;
  max-width: 66ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: var(--about-text);
}
.page-about .chapter-body h3{
  color: var(--shell);
}

.page-about .principles{
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-about .principle{
  background: var(--tide);
  border: 1px solid var(--about-soft);
  border-left: 2px solid var(--moss);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
}
.page-about .principle-title{
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.01em;
}
.page-about .principle p{
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-text);
}

.page-about .team-grid{
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 22px;
  align-items: start;
}
.page-about .team-card{
  background: var(--tide);
  border: 1px solid var(--about-soft);
  border-radius: var(--radius);
  padding: 20px 20px 16px;
  transition: background .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease);
}
.page-about .team-card:hover,
.page-about .team-card:focus-within{
  background: var(--deep);
  border-color: var(--mist);
  transform: translateY(-2px);
}
.page-about .team-tag{
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--glow);
}
.page-about .team-name{
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.01em;
}
.page-about .team-desc{
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-text);
}
.page-about .team-details{
  border-top: 1px solid rgba(159, 191, 191, .22);
  padding-top: 10px;
}
.page-about .team-details summary{
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color .2s var(--ease);
}
.page-about .team-details summary::-webkit-details-marker{ display: none; }
.page-about .team-details summary::before{
  content: "";
  width: 12px;
  height: 1px;
  background: var(--coral);
  flex: none;
}
.page-about .team-details summary:hover{ color: var(--glow); }
.page-about .team-details ul{
  margin: 10px 0 0;
  padding-left: 16px;
  display: grid;
  gap: 6px;
}
.page-about .team-details li{
  font-size: 13px;
  line-height: 1.65;
  color: var(--about-text);
}

.page-about .flow{
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
  counter-reset: none;
}
.page-about .flow li{
  position: relative;
  background: var(--tide);
  border: 1px solid var(--about-soft);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
}
.page-about .flow-no{
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--glow);
  margin-bottom: 6px;
}
.page-about .flow-title{
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
}
.page-about .flow p{
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-text);
}
.page-about #sec-flow .about-figure{
  margin-top: 24px;
}

.page-about .code-wrap{
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  margin: 22px 0 18px;
}
.page-about .code-break{
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}
.page-about .code-seg{
  background: var(--tide);
  border: 1px solid var(--about-soft);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
}
.page-about .code-seg:nth-child(2){
  background: var(--deep);
  border-color: rgba(28, 74, 99, .9);
}
.page-about .code-seg:nth-child(3){
  background: rgba(107, 133, 112, .26);
  border-color: rgba(107, 133, 112, .55);
}
.page-about .code-seg-val{
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  letter-spacing: .1em;
  color: var(--glow);
  line-height: 1.1;
}
.page-about .code-seg-label{
  display: block;
  margin: 4px 0 10px;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--mist);
}
.page-about .code-seg p{
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--about-text);
}
.page-about .about-figure--seal{
  max-width: 240px;
}

.page-about .timeline{
  list-style: none;
  margin: 22px 0 26px;
  padding: 0 0 0 26px;
  position: relative;
}
.page-about .timeline::before{
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--deep), rgba(160, 139, 120, .5));
}
.page-about .timeline li{
  position: relative;
  margin: 0 0 12px;
}
.page-about .timeline li::before{
  content: "";
  position: absolute;
  left: -26px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--clay);
  box-shadow: 0 0 0 3px var(--ink);
}
.page-about .tl-link{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--shell);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.page-about .tl-link span:last-child{
  font-family: var(--font-sans);
  letter-spacing: 0;
}
.page-about .tl-link:hover{
  color: var(--glow);
  border-bottom-color: var(--coral);
}
.page-about .tl-year{
  color: var(--mist);
}

.page-about .milestones{
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}
.page-about .milestone{
  background: var(--tide);
  border-left: 2px solid var(--clay);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.page-about .milestone:target{
  border-left-color: var(--coral);
  background: var(--deep);
}
.page-about .milestone p{
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-text);
}
.page-about .milestone-year{
  margin-bottom: 6px !important;
  font-family: var(--font-mono);
  font-size: 12px !important;
  letter-spacing: .1em;
  color: var(--mist) !important;
}

.page-about .partner-list{
  list-style: none;
  margin: 22px 0 18px;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .partner-list li{
  background: rgba(18, 48, 69, .55);
  border: 1px solid var(--about-soft);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
}
.page-about .partner-title{
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--shell);
}
.page-about .partner-list p{
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-text);
}

.page-about .about-cta{
  margin-top: clamp(30px, 5vw, 56px);
  display: grid;
  gap: 18px;
  padding: clamp(22px, 4vw, 36px);
  background:
    linear-gradient(135deg, rgba(18, 48, 69, .95), rgba(10, 27, 41, .95)),
    var(--tide);
  border: 1px solid var(--about-soft);
  border-radius: var(--radius);
}
.page-about .cta-title{
  margin: 0 0 8px;
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--shell);
}
.page-about .cta-text p:not(.eyebrow){
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--about-text);
}
.page-about .cta-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-about .cta-actions .btn{
  border-bottom: 0;
}

@media (min-width: 640px){
  .page-about .about-stats{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .flow{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .milestones{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .partner-list{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-cta{
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }
}

@media (min-width: 900px){
  .page-about .chapter{
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 0 var(--about-gap);
  }
  .page-about .chapter-no{
    padding-top: 4px;
  }
  .page-about .chapter-body{
    min-width: 0;
  }
  .page-about .team-grid{
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .flow{
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }
  .page-about .code-wrap{
    grid-template-columns: minmax(0, 1fr) 220px;
    align-items: start;
    gap: 24px;
  }
  .page-about .code-break{
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
  }
  .page-about .about-figure--seal{
    max-width: 100%;
  }
  .page-about .about-title{
    max-width: 18ch;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about *{
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
  .page-about .team-card:hover,
  .page-about .team-card:focus-within{
    transform: none;
  }
}
<<<END>>>