.page-about {
  --about-gap: clamp(20px, 4vw, 44px);
  --about-cut: 26px;
  --about-stepbg: rgba(201, 255, 69, 0.07);
  color: var(--mist);
  background: var(--ink);
  font-family: var(--font-body);
  line-height: 1.7;
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: clip;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

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

.page-about a {
  color: var(--lime);
}

/* ---------- hero ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(20px, 4vw, 36px) clamp(32px, 6vw, 64px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.16;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000 10%, transparent 88%);
  mask-image: linear-gradient(180deg, #000 10%, transparent 88%);
}

.page-about .about-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin: 0 0 clamp(20px, 4vw, 40px);
  padding: 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

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

.page-about .about-hero__main h1 {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(30px, 6.6vw, 58px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(15px, 2.2vw, 17px);
  color: var(--muted);
}

.page-about .about-hero__panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
  padding: 6px clamp(16px, 3vw, 24px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .about-stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-stat:first-child {
  border-top: 0;
}

.page-about .about-stat__num {
  font-family: var(--font-data);
  font-size: clamp(24px, 3.4vw, 30px);
  font-weight: 700;
  color: var(--lime);
  letter-spacing: -0.02em;
  line-height: 1;
  white-space: nowrap;
}

.page-about .about-stat__label {
  font-size: 13px;
  color: var(--muted);
  text-align: right;
}

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.7fr);
    align-items: end;
  }
}

/* ---------- section shell ---------- */
.page-about .about-section {
  padding-block: clamp(38px, 7vw, 78px);
}

.page-about .about-section--panel {
  background: linear-gradient(180deg, var(--ink-2), var(--ink) 85%);
  border-block: 1px solid var(--line);
}

.page-about .about-head {
  margin-bottom: clamp(24px, 4vw, 40px);
  max-width: 62ch;
}

.page-about .about-head h2 {
  margin: 10px 0 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(22px, 4vw, 36px);
  line-height: 1.24;
  color: var(--mist);
}

.page-about .about-head__lead {
  margin: 0;
  font-size: 15px;
  color: var(--muted);
}

/* ---------- track / timeline ---------- */
.page-about .about-track {
  display: grid;
  gap: var(--about-gap);
  grid-template-columns: minmax(0, 1fr);
}

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

.page-about .about-years__link {
  display: inline-block;
  padding: 7px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-years__link:hover,
.page-about .about-years__link:focus-visible {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

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

.page-about .about-figure {
  margin: 0 0 clamp(24px, 4vw, 36px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}

.page-about .about-figure img {
  width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .about-figure--tall {
  margin-bottom: 0;
}

.page-about .about-figure__cap {
  padding: 10px 16px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.page-about .about-timeline {
  margin: 0;
  padding: 4px 0 0 22px;
  list-style: none;
  border-left: 1px solid var(--line);
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .about-tl {
  position: relative;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 9px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--line);
}

.page-about .about-tl:last-child::before {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 0 6px rgba(201, 255, 69, 0.14);
}

.page-about .about-tl__year {
  margin: 0 0 6px;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .about-tl:last-child .about-tl__year {
  color: var(--lime);
}

.page-about .about-tl h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(18px, 2.6vw, 23px);
  line-height: 1.35;
  color: var(--mist);
}

.page-about .about-tl p {
  margin: 0;
  font-size: 15px;
  color: var(--muted);
}

@media (min-width: 960px) {
  .page-about .about-track {
    grid-template-columns: 128px minmax(0, 1fr);
  }

  .page-about .about-years {
    position: sticky;
    top: 104px;
  }

  .page-about .about-years__list {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- four data types ---------- */
.page-about .about-data {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-data__item {
  background: var(--ink-2);
  padding: clamp(20px, 3vw, 30px);
  transition: background var(--dur) var(--ease);
}

.page-about .about-data__item:hover {
  background: var(--panel);
}

.page-about .about-data__no {
  margin: 0 0 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--lime);
}

.page-about .about-data__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(17px, 2.4vw, 20px);
  color: var(--mist);
}

.page-about .about-data__item p {
  margin: 0;
  font-size: 14.5px;
  color: var(--muted);
}

@media (min-width: 760px) {
  .page-about .about-data {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- editorial flow ---------- */
.page-about .about-flow {
  display: grid;
  gap: var(--about-gap);
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-flow__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-step {
  position: relative;
  padding: clamp(16px, 3vw, 22px) 0 clamp(16px, 3vw, 22px) 56px;
  border-bottom: 1px dashed var(--line);
  transition: background var(--dur) var(--ease);
}

.page-about .about-step:hover {
  background: linear-gradient(90deg, var(--about-stepbg), transparent 78%);
}

.page-about .about-step__no {
  position: absolute;
  left: 0;
  top: clamp(16px, 3vw, 22px);
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--panel);
  color: var(--muted);
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-step::after {
  content: "";
  position: absolute;
  left: 16px;
  top: 52px;
  bottom: 0;
  width: 2px;
  background: var(--line);
  transition: background var(--dur) var(--ease);
}

.page-about .about-step:last-child::after {
  display: none;
}

.page-about .about-step:hover .about-step__no {
  background: var(--lime);
  color: var(--ink);
}

.page-about .about-step:hover::after {
  background: var(--amber);
}

.page-about .about-step h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(17px, 2.4vw, 20px);
  color: var(--mist);
}

.page-about .about-step p {
  margin: 0;
  font-size: 14.5px;
  color: var(--muted);
}

@media (min-width: 960px) {
  .page-about .about-flow {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
  }
}

/* ---------- android ---------- */
.page-about .about-app {
  display: grid;
  gap: clamp(22px, 4vw, 36px);
  grid-template-columns: minmax(0, 1fr);
  padding: clamp(22px, 4vw, 40px);
  background: var(--ink-2);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .about-app__body p {
  margin: 0 0 14px;
  font-size: 15px;
  color: var(--muted);
}

.page-about .about-app__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 0;
}

.page-about .about-app__specs {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
}

.page-about .about-app__specs li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  background: var(--panel);
}

.page-about .about-app__num {
  font-family: var(--font-data);
  font-size: 20px;
  font-weight: 700;
  color: var(--glow);
  letter-spacing: -0.02em;
}

.page-about .about-app__label {
  font-size: 13px;
  color: var(--muted);
  text-align: right;
}

@media (min-width: 860px) {
  .page-about .about-app {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
  }
}

/* ---------- cooperation ---------- */
.page-about .about-collab {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-collab details {
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 2px clamp(16px, 3vw, 22px);
}

.page-about .about-collab summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(16px, 2.4vw, 18px);
  color: var(--mist);
}

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

.page-about .about-collab summary::after {
  content: "+";
  font-family: var(--font-data);
  font-size: 20px;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-collab details[open] summary::after {
  content: "–";
  color: var(--amber);
}

.page-about .about-collab details[open] summary {
  border-bottom: 1px solid var(--line);
}

.page-about .about-collab p {
  margin: 14px 0 16px;
  font-size: 14.5px;
  color: var(--muted);
}

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

.page-about .about-honor__item {
  padding: clamp(18px, 3vw, 26px);
  border-left: 3px solid var(--amber);
  background: var(--panel);
}

.page-about .about-honor__year {
  margin: 0 0 8px;
  font-family: var(--font-data);
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-about .about-honor__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(17px, 2.4vw, 20px);
  color: var(--mist);
}

.page-about .about-honor__item p {
  margin: 0;
  font-size: 14.5px;
  color: var(--muted);
}

@media (min-width: 760px) {
  .page-about .about-honor {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- contact ---------- */
.page-about .about-contact {
  display: grid;
  gap: var(--about-gap);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.page-about .about-contact .about-figure {
  margin-bottom: 0;
}

.page-about .about-contact__list {
  margin: 0 0 18px;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-contact__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-contact__row dt {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-about .about-contact__row dd {
  margin: 0;
  font-size: 16px;
  color: var(--mist);
  word-break: break-word;
}

.page-about .about-contact__info p {
  margin: 0 0 14px;
  font-size: 14.5px;
  color: var(--muted);
}

.page-about .about-contact__actions {
  margin-top: 20px;
}

@media (min-width: 860px) {
  .page-about .about-contact {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }

  .page-about .about-contact__row {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}
<<<END>>>