.page-about {
  --about-card-shadow: 0 12px 30px rgba(11, 29, 58, 0.10);
  background: var(--fb-light);
  color: var(--fb-text-dark);
  font-family: var(--fb-font-body);
  line-height: 1.7;
}

.page-about .about-layout {
  max-width: var(--fb-content-max);
  margin: 0 auto;
  padding: 24px 16px 72px;
}

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

.page-about .about-sidebar {
  margin-bottom: 28px;
}

.page-about .about-side-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 6px;
  scrollbar-width: none;
}

.page-about .about-side-nav::-webkit-scrollbar {
  display: none;
}

.page-about .about-side-nav a {
  flex: 0 0 auto;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--fb-blue-1);
  color: var(--fb-text-light);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  transition: background .2s ease, color .2s ease;
}

.page-about .about-side-nav a:hover,
.page-about .about-side-nav a.is-active {
  background: var(--fb-neon);
  color: var(--fb-blue);
}

.page-about .about-side-note {
  display: none;
}

.page-about .about-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--fb-blue-3);
  margin: 0 0 28px;
}

.page-about .about-breadcrumb a {
  color: var(--fb-blue-2);
  text-decoration: none;
  font-weight: 700;
}

.page-about .about-breadcrumb a:hover {
  color: var(--fb-orange);
}

.page-about .about-section {
  scroll-margin-top: calc(var(--fb-header-h) + 24px);
  margin-bottom: 56px;
}

.page-about .about-section-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 16px;
}

.page-about .about-section-index {
  font-family: var(--fb-font-mono);
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
  padding: 8px 10px;
  border-radius: 8px;
  background: var(--fb-blue-1);
  color: var(--fb-neon);
  flex: 0 0 auto;
}

.page-about .about-kicker {
  font-family: var(--fb-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fb-blue-3);
  margin-bottom: 4px;
}

.page-about .about-section-desc {
  margin: 0 0 8px;
  color: var(--fb-blue-3);
  font-size: 16px;
  max-width: 640px;
}

.page-about h1,
.page-about h2 {
  font-family: var(--fb-font-heading);
  font-weight: 900;
  line-height: 1.15;
  margin: 0;
  color: var(--fb-blue);
}

.page-about h1 {
  font-size: 36px;
}

.page-about h2 {
  font-size: 28px;
}

.page-about h3 {
  font-family: var(--fb-font-heading);
  font-weight: 800;
  margin: 0 0 8px;
  color: var(--fb-blue);
  font-size: 18px;
}

.page-about .about-lead {
  font-size: 18px;
  color: var(--fb-blue-2);
  margin: 16px 0 24px;
  max-width: 680px;
}

.page-about .about-intro-grid {
  display: grid;
  gap: 24px;
}

.page-about .about-intro-copy p + p {
  margin-top: 12px;
}

.page-about .about-intro-copy a {
  color: var(--fb-blue-2);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--fb-neon);
  text-underline-offset: 3px;
}

.page-about .about-intro-copy a:hover {
  color: var(--fb-orange);
  text-decoration-color: var(--fb-orange);
}

.page-about .about-intro-img {
  width: 100%;
  height: auto;
  border-radius: var(--fb-radius);
  object-fit: cover;
  box-shadow: var(--about-card-shadow);
}

.page-about .about-timeline-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline-list::before {
  content: "";
  position: absolute;
  left: 30px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(to bottom, var(--fb-neon), var(--fb-blue-3));
  opacity: 0.55;
}

.page-about .about-timeline-item {
  position: relative;
  padding: 0 0 28px 72px;
}

.page-about .about-timeline-ver {
  position: absolute;
  left: 8px;
  top: 0;
  min-width: 46px;
  padding: 7px 10px;
  border-radius: 10px;
  background: var(--fb-blue-1);
  border: 1px solid var(--fb-neon);
  color: var(--fb-text-light);
  font-family: var(--fb-font-mono);
  font-size: 13px;
  font-weight: 700;
  text-align: center;
  line-height: 1;
}

.page-about .about-timeline-card {
  background: #FFFFFF;
  border-radius: var(--fb-radius-sm);
  padding: 18px 20px;
  box-shadow: var(--about-card-shadow);
}

.page-about .about-cert-grid {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

.page-about .about-cert-card {
  background: #FFFFFF;
  border-radius: var(--fb-radius);
  padding: 24px;
  border-top: 4px solid var(--fb-neon);
  box-shadow: var(--about-card-shadow);
}

.page-about .about-cert-card:nth-child(2) {
  border-top-color: var(--fb-blue-3);
}

.page-about .about-cert-card:nth-child(3) {
  border-top-color: var(--fb-orange);
}

.page-about .about-cert-card h3::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--fb-neon);
  margin-right: 8px;
}

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

.page-about .about-cert-number {
  font-family: var(--fb-font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--fb-orange);
  display: inline-block;
  margin-bottom: 6px;
}

.page-about .about-tech {
  background: linear-gradient(135deg, var(--fb-blue) 0%, var(--fb-blue-2) 100%);
  color: var(--fb-text-light);
  border-radius: var(--fb-radius);
  padding: 36px 20px;
}

.page-about .about-tech .about-section-head h2,
.page-about .about-tech .about-kicker {
  color: var(--fb-text-light);
}

.page-about .about-tech .about-section-desc {
  color: rgba(255, 255, 255, 0.72);
}

.page-about .about-tech .about-section-index {
  background: var(--fb-neon);
  color: var(--fb-blue);
}

.page-about .about-tech-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 24px 0;
}

.page-about .about-stat {
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--fb-radius-sm);
  padding: 20px 16px;
  text-align: center;
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--fb-font-mono);
  font-size: 32px;
  font-weight: 700;
  color: var(--fb-neon);
  line-height: 1.1;
}

.page-about .about-stat-label {
  display: block;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.78);
  margin-top: 8px;
}

.page-about .about-tech-grid {
  display: grid;
  gap: 20px;
  align-items: center;
}

.page-about .about-tech-grid p {
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
}

.page-about .about-tech-img {
  width: 100%;
  height: auto;
  border-radius: var(--fb-radius-sm);
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.page-about .about-eco-grid {
  display: grid;
  gap: 24px;
  margin-top: 20px;
}

.page-about .about-eco-copy p:first-child {
  margin-top: 0;
}

.page-about .about-eco-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-about .about-eco-list li {
  position: relative;
  padding: 10px 0 10px 24px;
  border-bottom: 1px solid rgba(11, 29, 58, 0.08);
}

.page-about .about-eco-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--fb-neon);
}

.page-about .about-eco-img {
  width: 100%;
  height: auto;
  border-radius: var(--fb-radius);
  object-fit: cover;
  box-shadow: var(--about-card-shadow);
}

.page-about .about-contact {
  background: var(--fb-blue-1);
  color: var(--fb-text-light);
  border-radius: var(--fb-radius);
  padding: 28px 20px;
}

.page-about .about-contact .about-section-head h2,
.page-about .about-contact .about-kicker {
  color: var(--fb-text-light);
}

.page-about .about-contact .about-section-index {
  background: var(--fb-neon);
  color: var(--fb-blue);
}

.page-about .about-contact-info p {
  color: rgba(255, 255, 255, 0.78);
  margin-top: 0;
}

.page-about .about-contact-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-about .about-contact-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--fb-border);
  color: rgba(255, 255, 255, 0.9);
}

.page-about .about-contact-list li:last-child {
  border-bottom: 0;
}

.page-about .about-contact-grid {
  display: grid;
  gap: 20px;
}

.page-about .about-contact-link {
  display: inline-block;
  margin-top: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--fb-neon);
  color: var(--fb-blue);
  font-weight: 800;
  text-decoration: none;
  justify-self: start;
}

.page-about .about-contact-link:hover {
  background: var(--fb-orange);
  color: var(--fb-text-light);
}

@media (min-width: 768px) {
  .page-about .about-tech-stats {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1080px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 56px;
    padding: 40px 32px 100px;
  }

  .page-about .about-sidebar {
    position: sticky;
    top: calc(var(--fb-header-h) + 32px);
    align-self: start;
    margin-bottom: 0;
  }

  .page-about .about-side-nav {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding: 0;
  }

  .page-about .about-side-nav a {
    padding: 10px 14px;
    border-radius: 10px;
    background: transparent;
    color: var(--fb-blue-2);
    border-left: 3px solid transparent;
    font-size: 15px;
    display: block;
  }

  .page-about .about-side-nav a:hover,
  .page-about .about-side-nav a.is-active {
    background: rgba(11, 29, 58, 0.06);
    color: var(--fb-blue);
    border-left-color: var(--fb-neon);
  }

  .page-about .about-side-note {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 24px;
    padding: 12px 14px;
    border-radius: 12px;
    background: var(--fb-blue-1);
    color: var(--fb-text-light);
    font-size: 13px;
  }

  .page-about .about-side-note-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--fb-neon);
    box-shadow: 0 0 0 4px rgba(0, 255, 163, 0.15);
  }

  .page-about h1 {
    font-size: 52px;
  }

  .page-about h2 {
    font-size: 34px;
  }

  .page-about .about-lead {
    font-size: 20px;
    margin-top: 20px;
  }

  .page-about .about-intro-grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

  .page-about .about-timeline-item {
    padding-left: 88px;
    padding-bottom: 36px;
  }

  .page-about .about-timeline-ver {
    left: 12px;
    min-width: 52px;
    font-size: 14px;
  }

  .page-about .about-timeline-list::before {
    left: 36px;
  }

  .page-about .about-timeline-card {
    padding: 22px 28px;
  }

  .page-about .about-cert-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-about .about-cert-card {
    padding: 28px;
  }

  .page-about .about-tech {
    padding: 48px 40px;
  }

  .page-about .about-tech-stats {
    gap: 20px;
  }

  .page-about .about-stat-num {
    font-size: 40px;
  }

  .page-about .about-tech-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }

  .page-about .about-eco-grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 40px;
  }

  .page-about .about-contact {
    padding: 40px 48px;
  }

  .page-about .about-contact-grid {
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 32px;
  }

  .page-about .about-contact-link {
    margin-top: 0;
  }
}