.page-about {
  --about-body: #C4D3E2;
  --about-soft: #1B4368;
  padding-bottom: clamp(40px, 7vw, 100px);
  color: var(--mist);
  background:
    radial-gradient(120% 60% at 90% -5%, rgba(200, 255, 61, 0.09), transparent 55%),
    radial-gradient(90% 50% at 0% 6%, rgba(255, 122, 26, 0.07), transparent 60%),
    var(--deep);
}

.page-about .about-head {
  padding-top: clamp(18px, 3.5vw, 38px);
}

.page-about .about-hero {
  display: grid;
  gap: clamp(22px, 4vw, 46px);
  padding-top: clamp(14px, 2.6vw, 28px);
  padding-bottom: clamp(28px, 5vw, 62px);
  align-items: center;
}

@media (min-width: 920px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
  }
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(1.72rem, 4.4vw, 3.05rem);
  line-height: 1.22;
  letter-spacing: 0.01em;
}

.page-about .about-hero__lead {
  margin: 16px 0 0;
  max-width: 48ch;
  font-size: clamp(0.94rem, 1.55vw, 1.04rem);
  line-height: 1.88;
  color: var(--about-body);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-hero__actions--inline {
  margin-top: 22px;
}

.page-about .about-hero__visual {
  position: relative;
  margin: 0;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid var(--about-soft);
  background: linear-gradient(155deg, var(--glow), var(--panel) 65%, var(--deep));
  box-shadow: 0 34px 72px -46px rgba(0, 0, 0, 0.95);
  isolation: isolate;
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.04);
}

.page-about .about-hero__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(180deg, transparent 42%, rgba(6, 26, 46, 0.88) 100%);
}

.page-about .about-hero__badge {
  position: absolute;
  z-index: 2;
  left: 14px;
  right: 14px;
  bottom: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--about-soft);
  background: rgba(6, 26, 46, 0.8);
  backdrop-filter: blur(8px);
}

.page-about .about-hero__badge span {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  padding-right: 12px;
  font-size: 0.76rem;
  color: var(--gray);
  border-right: 1px solid var(--about-soft);
}

.page-about .about-hero__badge span:last-child {
  padding-right: 0;
  border-right: 0;
}

.page-about .about-hero__badge b {
  font-family: var(--font-mono);
  font-size: 1.04rem;
  color: var(--lime);
}

.page-about .about-body {
  display: grid;
  gap: clamp(18px, 3vw, 34px);
  padding-top: clamp(16px, 3vw, 32px);
}

@media (min-width: 1080px) {
  .page-about .about-body {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(30px, 4vw, 66px);
    align-items: start;
  }
}

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

.page-about .about-index__caption {
  display: none;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--gray);
}

.page-about .about-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

@media (min-width: 1080px) {
  .page-about .about-index {
    position: sticky;
    top: 28px;
    align-self: start;
  }

  .page-about .about-index__caption {
    display: block;
  }

  .page-about .about-index__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }
}

.page-about .about-index__link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid var(--about-soft);
  background: rgba(11, 39, 72, 0.5);
  color: var(--gray);
  font-size: 0.82rem;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

@media (min-width: 1080px) {
  .page-about .about-index__link {
    border-radius: 10px;
    padding: 10px 12px;
  }
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
  background: rgba(200, 255, 61, 0.09);
}

.page-about .about-index__link:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-about .about-index__idx {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--lime);
  opacity: 0.85;
}

.page-about .about-chapter {
  padding-block: clamp(26px, 4.5vw, 58px);
  border-top: 1px solid var(--about-soft);
  scroll-margin-top: 84px;
}

.page-about .about-flow > .about-chapter:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-chapter__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
}

.page-about .about-chapter__num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 3vw, 2.25rem);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--lime);
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(1.28rem, 2.7vw, 1.92rem);
  line-height: 1.36;
  color: var(--mist);
}

.page-about .about-chapter__title::after {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  margin-top: 10px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--lime), var(--orange));
}

.page-about .about-text {
  margin-top: 18px;
  max-width: 64ch;
}

.page-about .about-text--tight {
  margin-top: 24px;
}

.page-about .about-text p {
  margin: 0 0 14px;
  font-size: clamp(0.93rem, 1.5vw, 1rem);
  line-height: 1.9;
  color: var(--about-body);
}

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

.page-about .path-line {
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 760px) {
  .page-about .path-line {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .path-line__item {
  position: relative;
  padding: 16px 16px 18px 20px;
  border-radius: 12px;
  border: 1px solid var(--about-soft);
  background: linear-gradient(165deg, rgba(23, 59, 87, 0.85), rgba(11, 39, 72, 0.35));
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .path-line__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--lime);
}

.page-about .path-line__item:last-child::before {
  background: var(--orange);
}

.page-about .path-line__item:hover {
  transform: translateY(-3px);
  border-color: var(--lime);
}

.page-about .path-line__name {
  display: block;
  margin-bottom: 6px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--mist);
}

.page-about .path-line__desc {
  display: block;
  font-size: 0.84rem;
  line-height: 1.75;
  color: var(--gray);
}

.page-about .flow {
  margin-top: 26px;
}

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

@media (min-width: 780px) {
  .page-about .flow__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

.page-about .flow__step {
  position: relative;
  padding: 20px 18px 22px;
  border-radius: 14px;
  border: 1px solid var(--about-soft);
  background: rgba(11, 39, 72, 0.45);
}

@media (min-width: 780px) {
  .page-about .flow__step:not(:last-child)::after {
    content: "";
    position: absolute;
    right: -18px;
    top: 43px;
    width: 18px;
    height: 1px;
    background: repeating-linear-gradient(90deg, var(--about-soft) 0 4px, transparent 4px 8px);
  }
}

.page-about .flow__mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  margin-bottom: 14px;
  border-radius: 50%;
  border: 1px solid var(--lime);
  background: rgba(200, 255, 61, 0.1);
  color: var(--lime);
}

.page-about .flow__mark svg {
  display: block;
  width: 22px;
  height: 22px;
}

.page-about .flow__step h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--mist);
}

.page-about .flow__step p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--gray);
}

.page-about .about-figure {
  margin: 24px 0 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--about-soft);
  background: var(--panel);
}

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

.page-about .about-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--about-soft);
  background: rgba(6, 26, 46, 0.6);
  font-size: 0.8rem;
  color: var(--silent);
}

.page-about .cadence {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 700px) {
  .page-about .cadence {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .cadence__item {
  position: relative;
  padding: 16px;
  border-radius: 12px;
  border: 1px solid var(--about-soft);
  background: rgba(23, 59, 87, 0.32);
}

.page-about .cadence__item::before {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  top: 0;
  height: 3px;
  border-radius: 0 0 3px 3px;
  background: linear-gradient(90deg, var(--lime), var(--orange));
}

.page-about .cadence__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 1.9rem);
  line-height: 1.1;
  color: var(--lime);
}

.page-about .cadence__label {
  display: block;
  margin-top: 6px;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--gray);
}

.page-about .roles {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

@media (min-width: 860px) {
  .page-about .roles {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .roles__item:nth-child(1),
  .page-about .roles__item:nth-child(4) {
    grid-column: span 7;
  }

  .page-about .roles__item:nth-child(2),
  .page-about .roles__item:nth-child(3) {
    grid-column: span 5;
  }
}

.page-about .role {
  height: 100%;
  border-radius: 14px;
  border: 1px solid var(--about-soft);
  background: linear-gradient(150deg, rgba(23, 59, 87, 0.9), rgba(11, 39, 72, 0.5));
  overflow: hidden;
  transition: border-color 0.22s var(--ease);
}

.page-about .role[open] {
  border-color: rgba(200, 255, 61, 0.45);
}

.page-about .role__summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .role__summary::-webkit-details-marker {
  display: none;
}

.page-about .role__summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -3px;
}

.page-about .role__count {
  min-width: 2.2ch;
  font-family: var(--font-mono);
  font-size: 1.7rem;
  line-height: 1;
  color: var(--lime);
}

.page-about .role--warm .role__count {
  color: var(--orange);
}

.page-about .role__label {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.page-about .role__name {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--mist);
}

.page-about .role__hint {
  font-size: 0.76rem;
  font-weight: 400;
  color: var(--silent);
}

.page-about .role__chev {
  flex: none;
  margin-left: auto;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--gray);
  border-bottom: 2px solid var(--gray);
  transform: rotate(45deg);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .role[open] .role__chev {
  transform: rotate(-135deg);
  border-color: var(--lime);
}

.page-about .role__body {
  padding: 0 18px 18px;
}

.page-about .role__body p {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.85;
  color: var(--gray);
}

.page-about .screens {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

@media (min-width: 820px) {
  .page-about .screens {
    grid-template-columns: 1fr 1.15fr 1.35fr;
    align-items: end;
  }
}

.page-about .screen {
  padding: 18px;
  border-radius: 14px;
  border: 1px solid var(--about-soft);
  background: rgba(11, 39, 72, 0.42);
}

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

.page-about .screen h3 {
  margin: 8px 0 0;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--mist);
}

.page-about .screen ul {
  display: grid;
  gap: 8px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .screen li {
  position: relative;
  padding-left: 16px;
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--gray);
}

.page-about .screen li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
}

.page-about .stages {
  display: grid;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .stage__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 0 12px 12px 0;
  border-left: 2px solid var(--about-soft);
  background: rgba(11, 39, 72, 0.4);
  cursor: pointer;
  list-style: none;
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .stage__summary::-webkit-details-marker {
  display: none;
}

.page-about .stage__summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-about .stage[open] .stage__summary {
  border-left-color: var(--lime);
  background: rgba(200, 255, 61, 0.07);
}

.page-about .stage__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--lime);
}

.page-about .stage__title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--mist);
}

.page-about .stage__plus {
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--gray);
  transition: transform 0.22s var(--ease), color 0.22s var(--ease);
}

.page-about .stage[open] .stage__plus {
  transform: rotate(45deg);
  color: var(--lime);
}

.page-about .stage__body {
  padding: 12px 16px 14px 28px;
}

.page-about .stage__body p {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.85;
  color: var(--gray);
}

.page-about .coop {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

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

.page-about .coop__item {
  padding: 16px;
  border-radius: 12px;
  border: 1px dashed var(--about-soft);
  background: rgba(6, 26, 46, 0.35);
}

.page-about .coop__item h3 {
  margin: 0 0 6px;
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--mist);
}

.page-about .coop__item p {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.75;
  color: var(--gray);
}

.page-about .reach {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

@media (min-width: 820px) {
  .page-about .reach {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .reach__card {
  display: block;
  padding: 20px 18px;
  border-radius: 14px;
  border: 1px solid var(--about-soft);
  background: linear-gradient(160deg, rgba(23, 59, 87, 0.72), rgba(11, 39, 72, 0.35));
  color: inherit;
  text-decoration: none;
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .reach__card:hover,
.page-about .reach__card:focus-visible {
  transform: translateY(-3px);
  border-color: var(--lime);
}

.page-about .reach__card:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-about .reach__card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 700;
  color: var(--mist);
}

.page-about .reach__card p {
  margin: 0 0 14px;
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--gray);
}

.page-about .reach__go {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-about .contact-box {
  margin-top: 26px;
  padding: clamp(20px, 3vw, 30px);
  border-radius: 16px;
  border: 1px solid var(--about-soft);
  background: linear-gradient(140deg, rgba(23, 59, 87, 0.75), rgba(6, 26, 46, 0.9));
}

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

@media (min-width: 720px) {
  .page-about .contact-box__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .contact-box__item {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.page-about .contact-box__key {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--gray);
}

.page-about .contact-box__note {
  margin: 18px 0 0;
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--silent);
}

@media (max-width: 560px) {
  .page-about .about-hero__title br {
    display: none;
  }

  .page-about .about-hero__badge {
    gap: 8px;
    padding: 10px 12px;
  }

  .page-about .about-hero__badge span {
    font-size: 0.7rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .path-line__item,
  .page-about .reach__card,
  .page-about .role__chev,
  .page-about .stage__plus,
  .page-about .about-index__link {
    transition: none;
  }

  .page-about .path-line__item:hover,
  .page-about .reach__card:hover {
    transform: none;
  }
}
<<<END>>>