.page-about {
  --ab-line: rgba(100, 127, 149, 0.28);
  --ab-soft: rgba(10, 34, 56, 0.14);
  --ab-body: #33475a;
  background: var(--kv-mist);
  color: var(--kv-ink);
  font-family: var(--kv-sans);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

.page-about .kv-container {
  width: 100%;
  max-width: var(--kv-w);
  margin-inline: auto;
  padding-inline: var(--kv-gutter);
}

.page-about .kv-breadcrumb {
  padding-block: clamp(14px, 2.4vw, 22px) 0;
}

/* ---------- Hero ---------- */
.page-about .ab-hero {
  padding-block: clamp(18px, 3vw, 28px) clamp(34px, 6vw, 72px);
}

.page-about .ab-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  padding: clamp(20px, 4vw, 46px);
  border: 1px solid var(--ab-line);
  border-radius: var(--kv-radius-l);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(45, 226, 230, 0.12), transparent 62%),
    linear-gradient(158deg, var(--kv-paper) 0%, #e6eff5 100%);
  overflow: hidden;
}

.page-about .ab-hero__grid::before {
  content: "";
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: clamp(20px, 4vw, 46px);
  width: clamp(64px, 16vw, 180px);
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: linear-gradient(90deg, var(--kv-cyan), var(--kv-orange));
}

.page-about .ab-hero__title {
  margin: 14px 0 0;
  font-family: var(--kv-serif);
  font-weight: 600;
  font-size: clamp(29px, 5.2vw, 50px);
  line-height: 1.2;
  letter-spacing: -0.012em;
  color: var(--kv-deep);
  max-width: 17ch;
}

.page-about .ab-hero__lede {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.8vw, 17px);
  line-height: 1.85;
  color: var(--ab-body);
}

.page-about .ab-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-hero__meta li {
  padding: 6px 13px;
  border: 1px solid rgba(10, 34, 56, 0.16);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--kv-deep);
  font-family: var(--kv-mono);
  font-size: 12px;
  letter-spacing: 0.03em;
  line-height: 1.5;
}

.page-about .ab-hero__fig {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .ab-hero__fig-frame {
  border: 1px solid var(--ab-line);
  border-radius: var(--kv-radius-m);
  overflow: hidden;
  aspect-ratio: 3 / 2;
  background: var(--kv-deep);
}

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

.page-about .ab-hero__fig-cap {
  font-family: var(--kv-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--kv-steel);
}

/* ---------- Sticky index ---------- */
.page-about .ab-index {
  position: sticky;
  top: 0;
  z-index: 6;
  background: var(--kv-deep);
  border-block: 1px solid rgba(45, 226, 230, 0.24);
}

.page-about .ab-index__inner {
  max-width: var(--kv-w);
  margin-inline: auto;
  padding-inline: var(--kv-gutter);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: none;
}

.page-about .ab-index__inner::-webkit-scrollbar {
  display: none;
}

.page-about .ab-index__list {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 10px 0;
  list-style: none;
  width: max-content;
}

.page-about .ab-index__link {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border: 1px solid rgba(221, 231, 238, 0.22);
  border-radius: 999px;
  color: var(--kv-mist);
  font-family: var(--kv-sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.24s var(--kv-ease), color 0.24s var(--kv-ease), border-color 0.24s var(--kv-ease);
}

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

.page-about .ab-index__link[aria-current="true"] {
  background: var(--kv-cyan);
  border-color: var(--kv-cyan);
  color: var(--kv-deep);
  text-decoration: none;
}

/* ---------- Chapter shell ---------- */
.page-about .ab-chapter {
  padding-block: clamp(44px, 7.5vw, 92px);
  scroll-margin-top: 76px;
}

.page-about .ab-chapter--paper {
  background: var(--kv-paper);
  border-block: 1px solid var(--ab-line);
}

.page-about .ab-chapter--banded {
  background:
    linear-gradient(180deg, rgba(45, 226, 230, 0.1) 0, rgba(45, 226, 230, 0) 120px),
    var(--kv-paper);
}

.page-about .ab-chapter--deep {
  background:
    radial-gradient(90% 120% at 8% 0%, rgba(45, 226, 230, 0.16), transparent 58%),
    var(--kv-deep);
  color: rgba(221, 231, 238, 0.86);
}

.page-about .ab-head {
  display: grid;
  gap: 4px;
  margin-bottom: clamp(24px, 4vw, 44px);
  padding-bottom: clamp(16px, 2.6vw, 26px);
  border-bottom: 1px solid var(--ab-line);
}

.page-about .ab-head__no {
  font-family: var(--kv-serif);
  font-size: clamp(34px, 7vw, 58px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ab-soft);
}

.page-about .ab-head__label {
  font-family: var(--kv-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--kv-steel);
}

.page-about .ab-head h2 {
  margin: 6px 0 0;
  max-width: 24ch;
  font-family: var(--kv-serif);
  font-weight: 600;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.28;
  letter-spacing: -0.008em;
  color: var(--kv-deep);
}

.page-about .ab-head--onDark {
  border-bottom-color: rgba(221, 231, 238, 0.2);
}

.page-about .ab-head--onDark .ab-head__no {
  color: rgba(45, 226, 230, 0.34);
}

.page-about .ab-head--onDark .ab-head__label {
  color: rgba(45, 226, 230, 0.8);
}

.page-about .ab-head--onDark h2 {
  color: var(--kv-paper);
}

/* ---------- 01 origin ---------- */
.page-about .ab-origin {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
}

.page-about .ab-origin__text p {
  margin: 0 0 1em;
  max-width: 52ch;
  color: var(--ab-body);
}

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

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
  border-radius: var(--kv-radius-m);
  overflow: hidden;
}

.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  padding: clamp(16px, 3vw, 24px);
  background: var(--kv-paper);
}

.page-about .ab-stat__label {
  order: 2;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--kv-steel);
}

.page-about .ab-stat__num {
  order: 1;
  margin: 0;
  font-family: var(--kv-mono);
  font-weight: 700;
  font-size: clamp(24px, 4.2vw, 32px);
  line-height: 1.1;
  color: var(--kv-deep);
  letter-spacing: -0.02em;
}

.page-about .ab-stat__num small {
  margin-left: 3px;
  font-family: var(--kv-sans);
  font-size: 12px;
  font-weight: 600;
  color: var(--kv-steel);
  letter-spacing: 0;
}

/* ---------- 02 roles ---------- */
.page-about .ab-roles {
  display: grid;
  gap: clamp(16px, 3vw, 26px);
}

.page-about .ab-role {
  position: relative;
  padding: clamp(20px, 3.4vw, 30px);
  border: 1px solid var(--ab-line);
  border-radius: var(--kv-radius-m);
  background: var(--kv-paper);
  box-shadow: var(--kv-shadow);
  transition: transform 0.32s var(--kv-ease), border-color 0.32s var(--kv-ease);
}

.page-about .ab-role::before {
  content: "";
  position: absolute;
  inset-block-start: 0;
  inset-inline-start: clamp(20px, 3.4vw, 30px);
  width: 42px;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: var(--kv-cyan);
}

.page-about .ab-role:nth-child(2)::before {
  background: var(--kv-orange);
}

.page-about .ab-role:hover,
.page-about .ab-role:focus-within {
  border-color: rgba(45, 226, 230, 0.7);
  transform: translateY(-4px);
}

.page-about .ab-role__title {
  margin: 14px 0 10px;
  font-family: var(--kv-serif);
  font-weight: 600;
  font-size: clamp(19px, 2.6vw, 23px);
  line-height: 1.4;
  color: var(--kv-deep);
}

.page-about .ab-role__text {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ab-body);
}

.page-about .ab-role__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 7px;
  border-top: 1px dashed var(--ab-line);
  padding-top: 14px;
}

.page-about .ab-role__list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--kv-steel);
}

.page-about .ab-role__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--kv-cyan);
}

.page-about .ab-fig-strip {
  margin: clamp(30px, 5vw, 56px) 0 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-fig-strip__frame {
  border: 1px solid var(--ab-line);
  border-radius: var(--kv-radius-m);
  overflow: hidden;
  aspect-ratio: 5 / 3;
  background: var(--kv-mist);
}

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

.page-about .ab-fig-strip__cap {
  font-family: var(--kv-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--kv-steel);
}

/* ---------- 03 workflow ---------- */
.page-about .ab-flow {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: rgba(45, 226, 230, 0.22);
  border: 1px solid rgba(45, 226, 230, 0.22);
  border-radius: var(--kv-radius-m);
  overflow: hidden;
}

.page-about .ab-flow__item {
  padding: clamp(18px, 3vw, 26px);
  background: rgba(18, 58, 86, 0.62);
}

.page-about .ab-flow__no {
  display: block;
  font-family: var(--kv-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--kv-cyan);
}

.page-about .ab-flow__item h3 {
  margin: 10px 0 8px;
  font-family: var(--kv-sans);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.4;
  color: var(--kv-paper);
}

.page-about .ab-flow__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(221, 231, 238, 0.82);
}

.page-about .ab-flow__note {
  margin: clamp(20px, 3.4vw, 30px) 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--kv-orange);
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(221, 231, 238, 0.78);
}

/* ---------- 04 timeline ---------- */
.page-about .ab-tl-wrap {
  display: grid;
  gap: clamp(26px, 5vw, 54px);
}

.page-about .ab-timeline {
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
  position: relative;
  display: grid;
  gap: clamp(20px, 3.4vw, 32px);
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--kv-cyan) 0%, var(--kv-steel) 55%, var(--kv-orange) 100%);
}

.page-about .ab-tl__item {
  position: relative;
}

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: -31px;
  top: 7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--kv-paper);
  border: 3px solid var(--kv-cyan);
  box-sizing: content-box;
}

.page-about .ab-tl__item:last-child::before {
  border-color: var(--kv-orange);
}

.page-about .ab-tl__tag {
  display: inline-block;
  margin-bottom: 6px;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--kv-deep);
  color: var(--kv-cyan);
  font-family: var(--kv-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.6;
}

.page-about .ab-tl__title {
  margin: 0 0 6px;
  font-family: var(--kv-serif);
  font-weight: 600;
  font-size: clamp(18px, 2.6vw, 22px);
  line-height: 1.4;
  color: var(--kv-deep);
}

.page-about .ab-tl__item p {
  margin: 0;
  max-width: 50ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ab-body);
}

.page-about .ab-tl-fig {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-tl-fig__frame {
  border: 1px solid var(--ab-line);
  border-radius: var(--kv-radius-m);
  overflow: hidden;
  aspect-ratio: 3 / 4;
  background: var(--kv-deep);
}

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

.page-about .ab-tl-fig__cap {
  font-family: var(--kv-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--kv-steel);
}

/* ---------- 05 reach ---------- */
.page-about .ab-reach {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .ab-reach__text p {
  margin: 0 0 1em;
  max-width: 52ch;
  color: var(--ab-body);
}

.page-about .ab-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-pill {
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--ab-line);
  background: rgba(221, 231, 238, 0.6);
  color: var(--kv-deep);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.5;
}

.page-about .ab-pill--accent {
  border-color: rgba(255, 138, 61, 0.5);
  background: rgba(255, 138, 61, 0.14);
  color: #a4470d;
}

.page-about .ab-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--ab-line);
}

.page-about .ab-steps__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  grid-template-areas:
    "no name"
    "no desc";
  gap: 2px 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--ab-line);
}

.page-about .ab-steps__no {
  grid-area: no;
  font-family: var(--kv-mono);
  font-size: 13px;
  line-height: 1.9;
  color: var(--kv-cyan);
  color: #1b7f86;
}

.page-about .ab-steps__name {
  grid-area: name;
  font-family: var(--kv-sans);
  font-weight: 700;
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--kv-deep);
}

.page-about .ab-steps__desc {
  grid-area: desc;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--kv-steel);
}

/* ---------- 06 service ---------- */
.page-about .ab-service {
  display: grid;
  gap: clamp(16px, 3vw, 26px);
}

.page-about .ab-service__card {
  padding: clamp(20px, 3.4vw, 32px);
  border: 1px solid var(--ab-line);
  border-radius: var(--kv-radius-m);
  background: var(--kv-paper);
}

.page-about .ab-service__card--accent {
  background:
    radial-gradient(120% 100% at 100% 0%, rgba(45, 226, 230, 0.16), transparent 60%),
    var(--kv-paper);
  border-color: rgba(45, 226, 230, 0.6);
}

.page-about .ab-service__title {
  margin: 0 0 16px;
  font-family: var(--kv-serif);
  font-weight: 600;
  font-size: clamp(19px, 2.8vw, 24px);
  line-height: 1.4;
  color: var(--kv-deep);
}

.page-about .ab-honor {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-about .ab-honor li {
  padding-left: 16px;
  border-left: 2px solid var(--kv-cyan);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ab-body);
}

.page-about .ab-honor__year {
  display: inline-block;
  margin-right: 8px;
  padding: 1px 8px;
  border-radius: 4px;
  background: var(--kv-deep);
  color: var(--kv-cyan);
  font-family: var(--kv-mono);
  font-size: 12px;
  line-height: 1.7;
}

.page-about .ab-service__note {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--kv-steel);
}

.page-about .ab-service__lead {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ab-body);
}

.page-about .ab-link {
  color: #0f6f76;
  font-family: var(--kv-mono);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .ab-link:hover,
.page-about .ab-link:focus-visible {
  color: var(--kv-orange);
}

.page-about .ab-service__btn {
  margin-top: 8px;
  text-decoration: none;
}

/* ---------- next ---------- */
.page-about .ab-next {
  padding-block: clamp(38px, 6vw, 76px);
  background: var(--kv-paper);
  border-top: 3px solid var(--kv-deep);
}

.page-about .ab-next__title {
  margin: 0 0 clamp(18px, 3vw, 28px);
  font-family: var(--kv-serif);
  font-weight: 600;
  font-size: clamp(20px, 3.4vw, 28px);
  line-height: 1.35;
  color: var(--kv-deep);
}

.page-about .ab-next__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--ab-line);
  border: 1px solid var(--ab-line);
  border-radius: var(--kv-radius-m);
  overflow: hidden;
}

.page-about .ab-next__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 15px 18px;
  background: var(--kv-paper);
  color: var(--kv-ink);
  font-size: 14.5px;
  line-height: 1.7;
  text-decoration: none;
  transition: background 0.24s var(--kv-ease), color 0.24s var(--kv-ease);
}

.page-about .ab-next__link:hover,
.page-about .ab-next__link:focus-visible {
  background: var(--kv-deep);
  color: var(--kv-paper);
}

.page-about .ab-next__no {
  flex: 0 0 auto;
  font-family: var(--kv-mono);
  font-size: 12px;
  color: var(--kv-steel);
}

.page-about .ab-next__link:hover .ab-next__no,
.page-about .ab-next__link:focus-visible .ab-next__no {
  color: var(--kv-cyan);
}

/* ---------- responsive ---------- */
@media (min-width: 700px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
  }

  .page-about .ab-origin {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .ab-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    padding-bottom: 56px;
  }

  .page-about .ab-role:nth-child(2) {
    transform: translateY(28px);
  }

  .page-about .ab-role:nth-child(3) {
    transform: translateY(56px);
  }

  .page-about .ab-role:nth-child(2):hover,
  .page-about .ab-role:nth-child(2):focus-within {
    transform: translateY(24px);
  }

  .page-about .ab-role:nth-child(3):hover,
  .page-about .ab-role:nth-child(3):focus-within {
    transform: translateY(52px);
  }

  .page-about .ab-tl-wrap {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: start;
  }

  .page-about .ab-reach {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    align-items: start;
  }

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

@media (min-width: 1040px) {
  .page-about .ab-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-role,
  .page-about .ab-index__link,
  .page-about .ab-next__link {
    transition: none;
  }

  .page-about .ab-role:hover,
  .page-about .ab-role:focus-within {
    transform: none;
  }

  .page-about .ab-role:nth-child(2):hover,
  .page-about .ab-role:nth-child(2):focus-within {
    transform: translateY(28px);
  }

  .page-about .ab-role:nth-child(3):hover,
  .page-about .ab-role:nth-child(3):focus-within {
    transform: translateY(56px);
  }
}
<<<END>>>