.page-about {
  --about-hair: rgba(200, 255, 61, 0.16);
  --about-glass: rgba(18, 52, 42, 0.72);
  --about-line: rgba(200, 255, 61, 0.22);
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(200, 255, 61, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 255, 61, 0.03) 1px, transparent 1px);
  background-size: 72px 72px;
  color: var(--snow);
  font-family: var(--font-body);
}

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

/* ---------- Hero ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 28px 0 56px;
  border-bottom: 1px solid var(--about-hair);
  background:
    radial-gradient(ellipse at 82% -10%, rgba(56, 232, 255, 0.13), transparent 58%),
    radial-gradient(ellipse at 0% 100%, rgba(200, 255, 61, 0.09), transparent 52%);
}

.page-about .about-hero__main {
  display: grid;
  gap: 26px;
}

.page-about .about-hero__aside {
  position: relative;
  padding-left: 18px;
  border-left: 1px solid var(--about-line);
}

.page-about .about-hero__aside-label {
  display: block;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.4em;
  color: var(--sage);
}

.page-about .about-hero__year {
  display: block;
  margin: 4px 0 10px;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(72px, 17vw, 140px);
  line-height: 0.85;
  letter-spacing: -0.05em;
  color: var(--lime);
  text-shadow: 0 0 48px rgba(200, 255, 61, 0.28);
}

.page-about .about-hero__aside-note {
  max-width: 32ch;
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--sage);
}

.page-about .about-hero__kicker {
  margin: 18px 0 10px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--cyan);
}

.page-about .about-hero__content h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.4vw, 54px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--snow);
}

.page-about .about-hero__lead {
  max-width: 62ch;
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sage);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  background: var(--about-hair);
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 12px;
  background: rgba(7, 26, 20, 0.88);
}

.page-about .about-hero__stats .num {
  font-size: 22px;
  line-height: 1.15;
  color: var(--lime);
}

.page-about .about-hero__stat-label {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sage);
}

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

/* ---------- Index bar ---------- */

.page-about .about-index {
  position: sticky;
  top: var(--bar-h);
  z-index: 5;
  background: rgba(7, 26, 20, 0.93);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-index__list {
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 8px 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__list li {
  flex: 0 0 auto;
}

.page-about .about-index__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid transparent;
  border-radius: 3px;
  font-size: 13px;
  color: var(--sage);
  text-decoration: none;
  white-space: nowrap;
  transition: color 180ms ease, background 180ms ease, border-color 180ms ease;
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--snow);
  border-color: var(--about-line);
  background: rgba(56, 232, 255, 0.08);
}

.page-about .about-index__num {
  font-family: var(--font-num);
  font-size: 11px;
  color: var(--lime);
}

/* ---------- Section shell ---------- */

.page-about .about-section {
  padding: 56px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-section .section-head {
  margin-bottom: 26px;
}

/* ---------- 01 Origin ---------- */

.page-about .about-origin {
  display: grid;
  gap: 26px;
}

.page-about .about-origin__text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sage);
}

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

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-metric {
  position: relative;
  padding: 16px 14px 18px;
  border: 1px solid var(--about-hair);
  border-top: 2px solid rgba(200, 255, 61, 0.5);
  border-radius: 4px;
  background: var(--about-glass);
  backdrop-filter: blur(8px);
}

.page-about .about-metric__num {
  display: block;
  font-size: 28px;
  line-height: 1.1;
  color: var(--lime);
}

.page-about .about-metric__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--snow);
}

.page-about .about-metric p {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--sage);
}

/* ---------- 02 Method ---------- */

.page-about .about-method {
  display: grid;
  gap: 28px;
  margin-bottom: 28px;
}

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

.page-about .about-step {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--about-hair);
  border-left: 2px solid rgba(56, 232, 255, 0.6);
  border-radius: 4px;
  background: var(--about-glass);
}

.page-about .about-step__no {
  font-family: var(--font-num);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--cyan);
}

.page-about .about-step h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--snow);
}

.page-about .about-step p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--sage);
}

.page-about .about-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--about-hair);
  border-radius: 4px;
  background: rgba(14, 42, 32, 0.6);
}

.page-about .about-cadence {
  width: 100%;
  min-width: 560px;
  margin: 0;
  border-collapse: collapse;
  font-size: 13px;
}

.page-about .about-cadence caption {
  padding: 12px 14px;
  text-align: left;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--sage);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-cadence th,
.page-about .about-cadence td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid rgba(200, 255, 61, 0.08);
  vertical-align: top;
}

.page-about .about-cadence thead th {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--cyan);
  background: rgba(56, 232, 255, 0.06);
}

.page-about .about-cadence tbody td {
  color: var(--sage);
  line-height: 1.65;
}

.page-about .about-cadence tbody td:first-child {
  color: var(--snow);
  font-weight: 600;
}

.page-about .about-cadence tbody tr:hover td {
  background: rgba(200, 255, 61, 0.05);
}

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

/* ---------- 03 Timeline ---------- */

.page-about .about-timeline-figure {
  margin: 0 0 30px;
}

.page-about .about-timeline-figure img {
  display: block;
  width: 100%;
  border: 1px solid var(--about-hair);
  border-radius: 4px;
  object-fit: cover;
}

.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, rgba(200, 255, 61, 0.75), rgba(56, 232, 255, 0.4), rgba(200, 255, 61, 0));
}

.page-about .timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  column-gap: 16px;
  padding-bottom: 20px;
}

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

.page-about .timeline__dot {
  grid-column: 1;
  justify-self: center;
  width: 12px;
  height: 12px;
  margin-top: 16px;
  border: 2px solid var(--lime);
  border-radius: 50%;
  background: var(--ink);
  box-shadow: 0 0 0 4px rgba(200, 255, 61, 0.1);
  z-index: 1;
}

.page-about .timeline__year {
  display: none;
  grid-column: 1;
}

.page-about .timeline__card {
  grid-column: 2;
  min-width: 0;
}

.page-about .timeline__card summary {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: 14px 44px 14px 16px;
  list-style: none;
  cursor: pointer;
  border: 1px solid var(--about-hair);
  border-left: 2px solid rgba(200, 255, 61, 0.65);
  border-radius: 4px;
  background: var(--about-glass);
  transition: background 180ms ease, border-color 180ms ease;
}

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

.page-about .timeline__card summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-num);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-about .timeline__card[open] summary::after {
  content: "−";
}

.page-about .timeline__card summary:hover,
.page-about .timeline__card summary:focus-visible {
  background: rgba(24, 64, 52, 0.85);
  border-color: var(--about-line);
  outline: none;
}

.page-about .timeline__year-inline {
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-about .timeline__title {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--snow);
}

.page-about .timeline__body {
  padding: 14px 16px 16px;
  border: 1px solid var(--about-hair);
  border-top: none;
  border-radius: 0 0 4px 4px;
  background: rgba(14, 42, 32, 0.55);
}

.page-about .timeline__body p {
  margin: 0 0 12px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--sage);
}

/* ---------- 04 Team ---------- */

.page-about .about-section.about-team {
  position: relative;
  overflow: hidden;
  padding: 56px 0;
  background: linear-gradient(180deg, rgba(14, 42, 32, 0.92), rgba(7, 26, 20, 0.94));
}

.page-about .about-team__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  filter: saturate(0.65);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-team__intro {
  max-width: 68ch;
  margin: 0 0 24px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sage);
}

.page-about .role-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .role-card {
  padding: 16px;
  border: 1px solid var(--about-hair);
  border-radius: 4px;
  background: rgba(18, 52, 42, 0.66);
  backdrop-filter: blur(6px);
}

.page-about .role-card[hidden] {
  display: none !important;
}

.page-about .role-card__head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.page-about .role-card__icon {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  border: 1px solid var(--cyan);
  transform: rotate(45deg);
}

.page-about .role-card--edit .role-card__icon {
  border-color: var(--lime);
}

.page-about .role-card--data .role-card__icon {
  border-color: var(--cyan);
}

.page-about .role-card--tech .role-card__icon {
  border-color: var(--violet);
}

.page-about .role-card__name {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--snow);
}

.page-about .role-card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--sage);
}

.page-about .role-card__meta {
  display: inline-block;
  margin-top: 12px;
  padding: 3px 8px;
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink);
  background: var(--sage);
  border-radius: 2px;
}

.page-about .role-card--edit .role-card__meta {
  background: var(--lime);
}

.page-about .role-card--data .role-card__meta {
  background: var(--cyan);
}

.page-about .role-card--tech .role-card__meta {
  background: var(--violet);
}

/* ---------- 05 Partners ---------- */

.page-about .about-eco {
  display: grid;
  gap: 26px;
}

.page-about .about-eco__figure {
  margin: 0;
}

.page-about .about-eco__figure img {
  display: block;
  width: 100%;
  border: 1px solid var(--about-hair);
  border-radius: 4px;
  object-fit: cover;
}

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

.page-about .badge-wall__item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding: 16px;
  border: 1px solid var(--about-hair);
  border-radius: 4px;
  background: rgba(18, 52, 42, 0.5);
}

.page-about .badge {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 20px;
  line-height: 1;
  color: var(--ink);
  clip-path: polygon(25% 6%, 75% 6%, 100% 50%, 75% 94%, 25% 94%, 0 50%);
}

.page-about .badge--text {
  font-size: 14px;
  letter-spacing: 0.02em;
}

.page-about .badge--lime {
  background: var(--lime);
}

.page-about .badge--cyan {
  background: var(--cyan);
}

.page-about .badge--violet {
  background: var(--violet);
}

.page-about .badge--amber {
  background: var(--amber);
}

.page-about .badge-wall__item h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--snow);
}

.page-about .badge-wall__item p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--sage);
}

.page-about .about-eco__note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--sage);
}

.page-about .about-eco__note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 06 Service ---------- */

.page-about .service-cards {
  display: grid;
  gap: 16px;
}

.page-about .service-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px;
  border: 1px solid var(--about-hair);
  border-radius: 4px;
  background: var(--about-glass);
  backdrop-filter: blur(8px);
}

.page-about .service-card__label {
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--cyan);
}

.page-about .service-card h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--snow);
}

.page-about .service-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--sage);
}

.page-about .service-card .btn {
  align-self: flex-start;
  margin-top: 6px;
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 24px;
  padding: 22px;
  border: 1px solid var(--about-line);
  border-radius: 4px;
  background: linear-gradient(120deg, rgba(200, 255, 61, 0.11), rgba(56, 232, 255, 0.09));
}

.page-about .about-cta h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--snow);
}

.page-about .about-cta p {
  max-width: 54ch;
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--sage);
}

/* ---------- Responsive ---------- */

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 40px 0 72px;
  }

  .page-about .about-hero__main {
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-method {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    gap: 44px;
    align-items: center;
  }

  .page-about .about-section {
    padding: 76px 0;
  }

  .page-about .about-section.about-team {
    padding: 76px 0;
  }
}

@media (min-width: 961px) {
  .page-about .about-index {
    top: 0;
  }
}

@media (min-width: 860px) {
  .page-about .timeline::before {
    left: 164px;
  }

  .page-about .timeline__item {
    grid-template-columns: 150px 28px minmax(0, 1fr);
    column-gap: 0;
    padding-bottom: 24px;
  }

  .page-about .timeline__dot {
    grid-column: 2;
    grid-row: 1;
    margin-top: 20px;
  }

  .page-about .timeline__year {
    display: block;
    grid-column: 1;
    grid-row: 1;
    justify-self: end;
    padding: 10px 24px 0 0;
    font-family: var(--font-num);
    font-size: 30px;
    font-weight: 700;
    line-height: 1;
    letter-spacing: -0.02em;
    color: var(--lime);
  }

  .page-about .timeline__card {
    grid-column: 3;
    padding-left: 28px;
  }

  .page-about .timeline__year-inline {
    display: none;
  }

  .page-about .timeline__title {
    font-size: 16px;
  }
}

@media (min-width: 1080px) {
  .page-about .role-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__list a,
  .page-about .timeline__card summary {
    transition: none;
  }
}