.page-about {
  position: relative;
  overflow-x: clip;
  padding-bottom: clamp(40px, 6vw, 84px);
  background:
    radial-gradient(120% 68% at 88% 0%, rgba(53, 242, 208, 0.1) 0%, rgba(53, 242, 208, 0) 58%),
    linear-gradient(180deg, var(--pitch-900) 0%, var(--ink-950) 36%, var(--ink-950) 100%);
  color: var(--paper-100);
  font-family: var(--font-body);
  font-size: var(--step-16);
  line-height: 1.75;
}

.page-about::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(30, 59, 52, 0.6) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 59, 52, 0.6) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.4;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.3) 45%, transparent 72%);
  mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.3) 45%, transparent 72%);
}

.page-about .about-wrap {
  position: relative;
  z-index: 1;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-about .about-crumb {
  padding-top: clamp(16px, 2.4vw, 26px);
  padding-bottom: clamp(10px, 1.8vw, 18px);
}

.page-about .about-layout {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
}

.page-about .about-main {
  min-width: 0;
  display: grid;
  gap: clamp(38px, 6vw, 76px);
}

/* ---------- hero ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  border-top: 1px solid var(--line-700);
  padding-top: clamp(18px, 3vw, 30px);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 6.6vw, 64px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 12px 0 18px;
  text-wrap: balance;
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 34em;
  color: rgba(242, 247, 244, 0.86);
}

.page-about .about-hero__meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 24px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line-700);
  font-family: var(--font-mono);
  font-size: var(--step-12);
  letter-spacing: 0.04em;
  color: var(--muted-400);
}

.page-about .about-hero__meta li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.page-about .about-hero__meta li::before {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--cyan-400);
  flex: none;
}

.page-about .lp-media {
  margin: 0;
}

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

.page-about .about-hero__media {
  border: 1px solid var(--line-700);
}

.page-about .about-hero__media img {
  aspect-ratio: 3 / 4;
}

.page-about .lp-media__caption {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: var(--step-12);
  line-height: 1.6;
  color: var(--muted-400);
  letter-spacing: 0.02em;
}

/* ---------- sections ---------- */
.page-about .about-sec {
  display: grid;
  gap: clamp(16px, 2.4vw, 28px);
  scroll-margin-top: 90px;
}

.page-about .about-head {
  display: flex;
  align-items: baseline;
  gap: clamp(12px, 2vw, 22px);
  padding-top: 14px;
  border-top: 1px solid var(--line-700);
}

.page-about .about-num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 40px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan-400);
  flex: none;
}

.page-about .about-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.6vw, 32px);
  line-height: 1.16;
  letter-spacing: -0.01em;
}

.page-about .about-body {
  display: grid;
  gap: clamp(16px, 2.6vw, 26px);
}

.page-about .about-copy p {
  margin: 0 0 1em;
  max-width: 40em;
  color: rgba(242, 247, 244, 0.86);
}

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

.page-about .about-note {
  align-self: start;
  border-top: 1px solid var(--cyan-400);
  padding-top: 10px;
  font-family: var(--font-mono);
  font-size: var(--step-12);
  line-height: 1.7;
}

.page-about .about-note__k {
  margin: 0 0 5px;
  color: var(--cyan-200);
  letter-spacing: 0.1em;
}

.page-about .about-note__v {
  margin: 0;
  color: var(--paper-100);
}

.page-about .about-inline-link {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 208, 0.45);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  border-bottom-color: var(--cyan-400);
}

/* ---------- groups ---------- */
.page-about .about-groups {
  display: grid;
  gap: 14px;
}

.page-about .about-group {
  background: var(--pitch-800);
  border: 1px solid var(--line-700);
  padding: 18px 18px 22px;
}

.page-about .about-group__num {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: var(--step-32);
  line-height: 1;
  color: var(--amber-500);
  letter-spacing: 0.02em;
}

.page-about .about-group__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-24);
  line-height: 1.2;
  color: var(--paper-100);
}

.page-about .about-group p {
  margin: 0;
  color: rgba(242, 247, 244, 0.82);
  font-size: var(--step-14);
  line-height: 1.8;
}

/* ---------- steps ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-step {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 18px 0;
  border-top: 1px solid var(--line-700);
}

.page-about .about-step:last-child {
  border-bottom: 1px solid var(--line-700);
}

.page-about .about-step__idx {
  font-family: var(--font-mono);
  font-size: var(--step-12);
  letter-spacing: 0.12em;
  color: var(--cyan-400);
}

.page-about .about-step__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-18);
  line-height: 1.3;
}

.page-about .about-step p {
  margin: 6px 0 0;
  max-width: 46em;
  color: rgba(242, 247, 244, 0.82);
  font-size: var(--step-14);
}

.page-about .about-figure {
  border: 1px solid var(--line-700);
}

.page-about .about-figure img {
  aspect-ratio: 21 / 9;
}

/* ---------- stats ---------- */
.page-about .about-data-figure {
  border: 1px solid var(--line-700);
}

.page-about .about-data-figure img {
  aspect-ratio: 10 / 7;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line-700);
  border-left: 1px solid var(--line-700);
}

.page-about .about-stat {
  padding: 18px 14px 20px;
  border-right: 1px solid var(--line-700);
  border-bottom: 1px solid var(--line-700);
  background: linear-gradient(160deg, rgba(18, 49, 42, 0.8), rgba(10, 31, 26, 0.5));
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.6vw, 40px);
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--cyan-400);
}

.page-about .about-stat__unit {
  font-family: var(--font-mono);
  font-size: var(--step-12);
  letter-spacing: 0.06em;
  color: var(--amber-500);
  margin-left: 5px;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 10px;
  font-size: var(--step-12);
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: var(--muted-400);
}

/* ---------- timeline ---------- */
.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 4px;
  position: relative;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan-400) 0%, var(--line-700) 78%, transparent 100%);
}

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 26px 30px;
}

.page-about .about-tl__item:last-child {
  padding-bottom: 0;
}

.page-about .about-tl__dot {
  position: absolute;
  left: 4px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--signal-500);
  box-shadow: 0 0 0 4px rgba(255, 77, 94, 0.14);
}

.page-about .about-tl__year {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: var(--step-24);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--amber-500);
}

.page-about .about-tl__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-18);
  line-height: 1.3;
}

.page-about .about-tl__text {
  margin: 0;
  max-width: 44em;
  font-size: var(--step-14);
  color: rgba(242, 247, 244, 0.8);
}

.page-about .about-tl__link {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px dashed rgba(53, 242, 208, 0.55);
  margin-left: 4px;
}

.page-about .about-tl__link:hover,
.page-about .about-tl__link:focus-visible {
  border-bottom-style: solid;
}

/* ---------- cta ---------- */
.page-about .about-cta {
  border: 1px solid var(--line-700);
  border-left: 3px solid var(--cyan-400);
  background: linear-gradient(120deg, var(--pitch-800) 0%, var(--pitch-900) 100%);
  padding: clamp(20px, 3vw, 32px);
  display: grid;
  gap: 16px;
}

.page-about .about-cta__text {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--step-14);
  letter-spacing: 0.02em;
  color: var(--cyan-200);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- index ---------- */
.page-about .about-index {
  font-family: var(--font-mono);
  font-size: var(--step-12);
  letter-spacing: 0.06em;
}

.page-about .about-index__title {
  margin: 0 0 10px;
  color: var(--muted-400);
  letter-spacing: 0.14em;
}

.page-about .about-index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-about .lp-index__link {
  display: block;
  padding: 5px 9px;
  color: var(--muted-400);
  text-decoration: none;
  border: 1px solid var(--line-700);
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .lp-index__link:hover,
.page-about .lp-index__link:focus-visible {
  color: var(--cyan-400);
  border-color: var(--cyan-400);
}

.page-about .lp-index__link[data-active="true"] {
  color: var(--ink-950);
  background: var(--cyan-400);
  border-color: var(--cyan-400);
}

/* ---------- responsive ---------- */
@media (min-width: 640px) {
  .page-about .about-step {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 4px 18px;
    padding: 20px 0;
  }

  .page-about .about-step__idx {
    padding-top: 4px;
  }
}

@media (min-width: 780px) {
  .page-about .about-groups {
    grid-template-columns: 1.1fr 1fr 1.06fr;
    gap: 16px;
  }

  .page-about .about-group:nth-child(2) {
    margin-top: 26px;
  }

  .page-about .about-group:nth-child(3) {
    margin-top: 10px;
  }

  .page-about .about-stats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-stat__label {
    font-size: var(--step-14);
  }
}

@media (min-width: 880px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: clamp(24px, 4vw, 52px);
    align-items: start;
  }

  .page-about .about-body {
    grid-template-columns: minmax(0, 1fr) 196px;
    gap: clamp(24px, 4vw, 48px);
  }

  .page-about .about-note {
    padding-top: 12px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: minmax(0, 1fr) 152px;
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 84px;
    padding-top: 16px;
    border-top: 1px solid var(--line-700);
  }

  .page-about .about-index ol {
    flex-direction: column;
    gap: 2px;
  }

  .page-about .lp-index__link {
    border: 0;
    border-left: 1px solid var(--line-700);
    padding: 5px 0 5px 10px;
  }

  .page-about .lp-index__link:hover,
  .page-about .lp-index__link:focus-visible {
    border-left-color: var(--cyan-400);
  }

  .page-about .lp-index__link[data-active="true"] {
    color: var(--cyan-400);
    background: transparent;
    border-left: 2px solid var(--cyan-400);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .lp-index__link {
    transition: none;
  }
}
<<<END>>>