.page-about {
  --about-grid-line: rgba(0, 255, 163, 0.05);
  --about-border: rgba(255, 255, 255, 0.09);
  --about-card-bg: rgba(17, 22, 61, 0.72);
  position: relative;
  background-color: var(--bg-deep);
  overflow-x: clip;
}

.page-about::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--about-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--about-grid-line) 1px, transparent 1px);
  background-size: 44px 44px;
}

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

.page-about__hero {
  position: relative;
  isolation: isolate;
  padding: calc(var(--header-h) + 40px) 20px 48px;
}

.page-about__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse at 78% 18%, rgba(0, 255, 163, 0.14), transparent 46%),
    linear-gradient(118deg, transparent 18%, rgba(0, 209, 255, 0.08) 42%, transparent 58%, rgba(0, 255, 163, 0.10) 76%, transparent 90%);
  transform: skewX(-5deg);
  transform-origin: center left;
}

.page-about__hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image: linear-gradient(100deg, transparent 20%, rgba(0, 255, 163, 0.05) 42%, transparent 62%, rgba(0, 209, 255, 0.06) 76%, transparent 88%);
  background-size: 480px 100%;
  animation: pageAboutDrift 18s linear infinite alternate;
}

@keyframes pageAboutDrift {
  from { background-position: -160px 0; }
  to { background-position: 260px 0; }
}

.page-about__hero-grid {
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-about__hero h1 {
  margin: 12px 0 18px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 7vw, 64px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
  transform: skewX(-6deg);
}

.page-about__hero-lead {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
  max-width: 34em;
  margin-bottom: 26px;
}

.page-about__hero-visual {
  min-width: 0;
}

.page-about__hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: 22px;
  border: 1px solid rgba(0, 255, 163, 0.22);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.45), 0 0 40px rgba(0, 255, 163, 0.10);
  transform: perspective(900px) rotateY(-4deg) skewX(-1deg);
  object-fit: cover;
}

.page-about__intro {
  background: linear-gradient(180deg, rgba(102, 255, 204, 0.05), transparent 40%);
}

.page-about__intro-layout {
  display: grid;
  gap: 28px;
  margin-top: 28px;
}

.page-about__intro-copy p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.85;
  margin-bottom: 16px;
}

.page-about__intro-points {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about__point {
  border: 1px solid var(--about-border);
  border-radius: var(--radius-sm);
  padding: 18px 16px;
  background: linear-gradient(135deg, rgba(17, 22, 61, 0.85), rgba(17, 22, 61, 0.45));
}

.page-about__point-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
}

.page-about__point-label {
  display: block;
  color: var(--muted);
  font-size: 13px;
  margin-top: 6px;
}

.page-about__timeline-wrap {
  display: grid;
  gap: 28px;
  margin-top: 28px;
}

.page-about__timeline-figure {
  margin: 0;
  min-width: 0;
}

.page-about__timeline-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--about-border);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.page-about__timeline-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  position: relative;
}

.page-about__timeline-list::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--cyan) 70%, transparent);
  opacity: 0.5;
}

.page-about__milestone {
  position: relative;
  padding-bottom: 26px;
}

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

.page-about__milestone::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 14px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg-deep);
  border: 3px solid var(--accent);
  box-shadow: 0 0 16px rgba(0, 255, 163, 0.55);
  transition: transform 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about__milestone:hover::before {
  background: var(--accent);
  transform: scale(1.2);
}

.page-about__milestone-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.03em;
  transform: skewX(-8deg);
  margin-bottom: 8px;
}

.page-about__milestone-card {
  background: var(--about-card-bg);
  border: 1px solid var(--about-border);
  border-radius: var(--radius-sm);
  padding: 14px 16px 12px;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about__milestone-card h3 {
  color: var(--white);
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 6px;
}

.page-about__milestone-card p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
}

.page-about__milestone:hover .page-about__milestone-card {
  border-color: rgba(0, 255, 163, 0.4);
  transform: translateX(4px);
}

.page-about__products {
  background:
    radial-gradient(ellipse at 80% 20%, rgba(123, 97, 255, 0.12), transparent 42%),
    linear-gradient(180deg, transparent, rgba(0, 209, 255, 0.05));
}

.page-about__tabs {
  margin-top: 30px;
}

.page-about__tabs .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}

.page-about__tabs .tabs__button {
  appearance: none;
  background: rgba(17, 22, 61, 0.85);
  border: 1px solid var(--about-border);
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  padding: 9px 16px;
  border-radius: 999px;
  cursor: pointer;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about__tabs .tabs__button[aria-selected="true"] {
  color: var(--white);
  border-color: var(--accent);
  background: linear-gradient(90deg, rgba(0, 255, 163, 0.16), rgba(0, 209, 255, 0.10));
  box-shadow: 0 0 24px rgba(0, 255, 163, 0.16);
}

.page-about__tabs .tabs__button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.page-about__tabs .tabs__panel {
  background: var(--about-card-bg);
  border: 1px solid var(--about-border);
  border-radius: var(--radius);
  padding: 20px 18px;
  margin-bottom: 14px;
}

.page-about__tabs .tabs__panel[aria-hidden="true"] {
  display: none;
}

.page-about__tabs .tabs__panel h3 {
  color: var(--white);
  font-size: 20px;
  margin: 0 0 8px;
}

.page-about__tabs .tabs__panel p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
  margin: 0 0 12px;
}

.page-about__tabs .tabs__panel ul {
  margin: 0;
  padding-left: 20px;
  color: var(--white);
  font-size: 14px;
  line-height: 1.8;
}

.page-about__tabs .tabs__panel li::marker {
  color: var(--accent);
}

.page-about__products-figure {
  margin: 22px 0 0;
  min-width: 0;
}

.page-about__products-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid rgba(0, 209, 255, 0.18);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
}

.page-about__tech-stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 30px;
}

.page-about__stat {
  background: linear-gradient(145deg, rgba(17, 22, 61, 0.92), rgba(17, 22, 61, 0.5));
  border: 1px solid var(--about-border);
  border-radius: var(--radius-sm);
  padding: 18px 16px 16px;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.page-about__stat:hover {
  border-color: rgba(0, 255, 163, 0.38);
  transform: translateY(-3px);
  box-shadow: 0 14px 38px rgba(0, 0, 0, 0.32);
}

.page-about__stat .stat-card__value {
  font-size: 28px;
  color: var(--accent);
}

.page-about__stat .stat-card__label {
  font-size: 12px;
  color: var(--muted);
}

.page-about__cert {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 26px;
}

.page-about__cert-item {
  background: rgba(0, 255, 163, 0.06);
  border: 1px dashed rgba(0, 255, 163, 0.28);
  border-radius: var(--radius-sm);
  padding: 16px 14px;
}

.page-about__cert-badge {
  display: block;
  color: var(--accent);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 6px;
}

.page-about__cert-item p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
  margin: 0;
}

.page-about__team {
  display: grid;
  gap: 10px;
  margin-top: 22px;
  padding: 18px 16px;
  background: rgba(0, 209, 255, 0.07);
  border-left: 3px solid var(--cyan);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-about__team p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
}

.page-about__next {
  text-align: center;
  padding-bottom: 72px;
  background:
    linear-gradient(180deg, transparent, rgba(0, 255, 163, 0.08)),
    radial-gradient(ellipse at 50% 100%, rgba(0, 209, 255, 0.14), transparent 60%);
}

.page-about__next h2 {
  font-size: clamp(28px, 5vw, 42px);
  color: var(--white);
  font-weight: 900;
  margin: 10px 0 12px;
  transform: skewX(-6deg);
}

.page-about__next-lead {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
  max-width: 34em;
  margin: 0 auto 28px;
}

.page-about__next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

@media (min-width: 620px) {
  .page-about__intro-points {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about__cert {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 860px) {
  .page-about__intro-layout {
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
  }
}

@media (min-width: 960px) {
  .page-about__hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 48px;
  }

  .page-about__tech-stats {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about__cert {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1000px) {
  .page-about__timeline-wrap {
    grid-template-columns: 5fr 7fr;
    gap: 44px;
    align-items: start;
  }
}