.page-about {
  --about-hero-bg: linear-gradient(135deg, rgba(0, 212, 255, 0.14) 0%, rgba(155, 92, 255, 0.08) 100%);
  --about-gold-line: #F5C518;
  --about-panel-deep: #161C2B;
  --about-version-anchor: #00D4FF;
}

.page-about .container {
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: 20px;
}

.page-about .breadcrumb {
  padding-top: 24px;
  font-size: 13px;
  color: var(--c-text-dim);
  display: flex;
  gap: 8px;
  align-items: center;
}

.page-about .breadcrumb a {
  color: var(--c-accent);
  text-decoration: none;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  text-decoration: underline;
  outline: none;
}

.page-about .breadcrumb__current {
  color: var(--c-text);
}

.page-about .about-hero {
  padding-top: 48px;
  padding-bottom: 64px;
}

.page-about .about-hero__inner {
  display: grid;
  gap: 32px;
}

.page-about .about-hero__tag {
  background: rgba(155, 92, 255, 0.18);
  color: var(--c-accent2);
  border: 1px solid rgba(155, 92, 255, 0.3);
  padding: 6px 14px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  display: inline-block;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.2;
  color: var(--c-text);
  margin-top: 18px;
  margin-bottom: 18px;
  font-weight: 900;
  letter-spacing: -0.01em;
  max-width: 14ch;
}

.page-about .about-hero__lead {
  color: var(--c-text-dim);
  font-size: 17px;
  line-height: 1.8;
  max-width: 50ch;
  margin-bottom: 32px;
}

.page-about .about-hero__meta-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  background: var(--about-hero-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.page-about .about-hero__meta-grid::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--c-accent), var(--c-accent2));
}

.page-about .about-hero__meta-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero__meta-label {
  font-size: 12px;
  color: var(--c-text-dim);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

.page-about .about-hero__meta-value {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-text);
  font-family: var(--font-display);
}

.page-about .about-hero__visual img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
  object-fit: cover;
  border: 1px solid var(--c-border);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
}

.page-about .about-directory {
  padding-bottom: 32px;
  border-bottom: 1px solid var(--c-border);
  margin-bottom: 48px;
}

.page-about .about-directory__head {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-gold);
  letter-spacing: 0.08em;
  margin-bottom: 12px;
}

.page-about .about-directory__list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding: 0;
  margin: 0;
}

.page-about .about-directory__list li {
  margin: 0;
}

.page-about .about-directory__list a {
  color: var(--c-text);
  text-decoration: none;
  font-size: 15px;
  border: 1px solid var(--c-border);
  background: rgba(255, 255, 255, 0.03);
  padding: 8px 14px;
  border-radius: 6px;
  display: inline-block;
  transition: border-color var(--transition), color var(--transition);
}

.page-about .about-directory__list a:hover,
.page-about .about-directory__list a:focus-visible {
  border-color: var(--c-accent);
  color: var(--c-accent);
  outline: none;
}

.page-about .section {
  padding-block: 56px;
}

.page-about .about-section-index {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-accent);
  letter-spacing: 0.05em;
  display: inline-block;
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 4px;
  padding: 2px 8px;
  margin-bottom: 14px;
}

.page-about h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  color: var(--c-text);
  line-height: 1.25;
  margin-top: 0;
  margin-bottom: 20px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-about h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--c-text);
  margin-top: 0;
  margin-bottom: 16px;
  font-weight: 700;
}

.page-about .about-position__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-position__text p {
  color: var(--c-text-dim);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.page-about .about-position__link {
  margin-top: 8px;
}

.page-about .about-position__facts {
  background: var(--about-panel-deep);
  border-radius: var(--radius);
  padding: 28px;
  border-top: 3px solid var(--c-gold);
  position: relative;
}

.page-about .about-position__facts-list {
  list-style: none;
  padding: 0;
  margin: 0 0 20px 0;
}

.page-about .about-position__facts-list li {
  color: var(--c-text);
  font-size: 15px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  gap: 10px;
  align-items: center;
}

.page-about .about-position__facts-list li::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--c-accent);
  border-radius: 1px;
  display: inline-block;
  transform: rotate(45deg);
  flex-shrink: 0;
}

.page-about .about-position__note {
  color: var(--c-text-dim);
  font-size: 13px;
  line-height: 1.6;
  margin: 0;
}

.page-about .about-culture {
  background:
    linear-gradient(rgba(10, 14, 26, 0.9), rgba(10, 14, 26, 0.95)),
    repeating-linear-gradient(45deg, rgba(155, 92, 255, 0.08) 0, rgba(155, 92, 255, 0.08) 1px, transparent 1px, transparent 12px);
  border-block: 1px solid var(--c-border);
}

.page-about .about-culture__wrap {
  display: grid;
  gap: 32px;
}

.page-about .about-culture__image img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
  object-fit: cover;
  border: 1px solid var(--c-border);
}

.page-about .about-culture__content p {
  color: var(--c-text-dim);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.page-about .about-culture__quote {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--c-text);
  border-left: 4px solid var(--c-gold);
  padding-left: 18px;
  margin: 0 0 24px 0;
  line-height: 1.4;
  background: rgba(245, 197, 24, 0.06);
  padding-block: 12px;
}

.page-about .about-culture__link {
  margin-top: 8px;
}

.page-about .about-version__head {
  margin-bottom: 36px;
}

.page-about .about-version__head p {
  color: var(--c-text-dim);
  font-size: 16px;
  line-height: 1.8;
  max-width: 46ch;
}

.page-about .about-version__layout {
  display: grid;
  gap: 32px;
}

.page-about .about-version__timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 24px;
  padding-left: 24px;
}

.page-about .about-version__timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--c-accent), var(--c-accent2));
  transform: skewX(-8deg);
}

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

.page-about .about-version__node {
  background: var(--about-panel-deep);
  border: 1px solid var(--c-border);
  border-radius: 10px;
  padding: 20px;
  position: relative;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  cursor: default;
}

.page-about .about-version__node::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 22px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--c-accent);
  border: 3px solid var(--c-bg);
  box-shadow: 0 0 0 2px var(--c-accent);
}

.page-about .about-version__node:hover,
.page-about .about-version__node:focus-visible {
  border-color: var(--c-accent);
  box-shadow: 0 0 24px rgba(0, 212, 255, 0.15);
  transform: translateX(4px);
  outline: none;
}

.page-about .about-version__node-version {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-accent);
  margin-bottom: 8px;
}

.page-about .about-version__node-desc {
  color: var(--c-text-dim);
  font-size: 15px;
  line-height: 1.7;
  display: block;
}

.page-about .about-version__side img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  display: block;
  object-fit: cover;
  border: 1px solid var(--c-border);
  margin-bottom: 16px;
}

.page-about .about-version__side-note {
  background: var(--about-hero-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-version__side-num {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--c-gold);
}

.page-about .about-version__side-text {
  color: var(--c-text-dim);
  font-size: 14px;
}

.page-about .about-version__side-note a {
  color: var(--c-accent);
  text-decoration: none;
  font-size: 14px;
  margin-top: 8px;
}

.page-about .about-version__side-note a:hover {
  text-decoration: underline;
}

.page-about .about-user {
  border-top: 1px solid var(--c-border);
}

.page-about .about-user__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-user__main p {
  color: var(--c-text-dim);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.page-about .about-user__link {
  margin-top: 8px;
}

.page-about .about-user__principles {
  background: var(--about-hero-bg);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  overflow: hidden;
}

.page-about .about-user__principles::after {
  content: "";
  position: absolute;
  right: -40px;
  top: -40px;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(155, 92, 255, 0.18) 0%, transparent 70%);
  pointer-events: none;
}

.page-about .about-user__principles-list {
  list-style: none;
  padding: 0;
  margin: 0 0 20px 0;
}

.page-about .about-user__principles-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--c-text);
  font-size: 15px;
}

.page-about .about-user__principles-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-accent2);
  border: 1px solid rgba(155, 92, 255, 0.3);
  border-radius: 4px;
  padding: 2px 6px;
  flex-shrink: 0;
}

.page-about .about-user__principles-note {
  color: var(--c-text-dim);
  font-size: 13px;
  line-height: 1.6;
  margin: 0;
  font-family: var(--font-mono);
}

.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 6px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: border-color var(--transition), background-color var(--transition), color var(--transition), box-shadow var(--transition), transform var(--transition);
  border: 1px solid transparent;
  cursor: pointer;
  line-height: 1;
}

.page-about .btn--ghost {
  background: transparent;
  border-color: var(--c-border);
  color: var(--c-text);
}

.page-about .btn--ghost:hover,
.page-about .btn--ghost:focus-visible {
  border-color: var(--c-accent);
  color: var(--c-accent);
  outline: none;
}

.page-about .btn--gold {
  background: #F5C518;
  color: #0A0E1A;
}

.page-about .btn--gold:hover,
.page-about .btn--gold:focus-visible {
  box-shadow: 0 0 28px rgba(245, 197, 24, 0.35);
  outline: none;
}

.page-about .btn--primary {
  background: linear-gradient(135deg, var(--c-accent), var(--c-accent2));
  color: #0A0E1A;
  font-weight: 800;
}

.page-about .btn--primary:hover,
.page-about .btn--primary:focus-visible {
  box-shadow: 0 0 28px rgba(0, 212, 255, 0.3);
  outline: none;
  transform: translateY(-1px);
}

@media (min-width: 768px) {
  .page-about .container {
    padding-inline: 32px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-hero__visual {
    margin-top: 40px;
  }

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

  .page-about .about-position__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    gap: 48px;
  }

  .page-about .about-culture__wrap {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 48px;
    align-items: center;
  }

  .page-about .about-version__layout {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    gap: 48px;
    align-items: start;
  }

  .page-about .about-user__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 48px;
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero {
    padding-top: 56px;
    padding-bottom: 80px;
  }

  .page-about .section {
    padding-block: 80px;
  }

  .page-about .about-position__grid {
    gap: 80px;
  }
}