.page-about {
  --about-red: var(--c-red);
  --about-gold: var(--c-gold);
  --about-line: var(--c-border);
  max-width: var(--container);
  margin: 0 auto;
  padding: 28px 20px 80px;
  font-family: var(--font-body);
  color: var(--c-ink);
  background:
    radial-gradient(circle at 14% 22%, rgba(0, 229, 255, 0.07) 0 2px, transparent 2.5px),
    radial-gradient(circle at 58% 36%, rgba(255, 215, 0, 0.06) 0 2px, transparent 2.5px),
    radial-gradient(circle at 86% 68%, rgba(155, 89, 182, 0.05) 0 2px, transparent 2.5px),
    var(--c-bg);
  overflow: hidden;
}

.page-about .breadcrumb-list {
  align-items: center;
}
.page-about .breadcrumb-link {
  color: var(--c-ink);
  text-underline-offset: 4px;
  text-decoration-color: var(--about-line);
}
.page-about .breadcrumb-current {
  color: var(--c-muted);
}

.page-about-hero {
  position: relative;
  margin: 28px 0 56px;
  padding: 30px 24px 36px;
  background: var(--c-white);
  border: 2px solid var(--c-ink);
  box-shadow: 10px 10px 0 var(--c-bg-alt);
  overflow: hidden;
}
.page-about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  border-style: solid;
  border-width: 0 38px 38px 0;
  border-color: transparent var(--about-gold) transparent transparent;
}
.page-about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--c-red) 0 20%, var(--c-gold) 20% 40%, var(--c-blue) 40% 60%, var(--c-purple) 60% 80%, var(--c-ink) 80% 100%);
}
.page-about-hero-meta {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--about-red);
  margin-bottom: 14px;
}
.page-about-hero-title {
  font-family: var(--font-head);
  font-size: 40px;
  line-height: 1.15;
  font-weight: 800;
  color: var(--c-ink);
  margin: 0 0 16px;
  letter-spacing: -0.02em;
}
.page-about-hero-deco {
  display: block;
  font-size: 22px;
  font-weight: 600;
  color: var(--c-muted);
  margin-top: 10px;
  letter-spacing: 0;
}
.page-about-hero-excerpt {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.8;
  color: var(--c-muted);
  max-width: 680px;
  margin: 0 0 20px;
}
.page-about-hero-note {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 600;
  color: var(--c-ink);
  background: var(--c-bg);
  border: 1px solid var(--about-line);
  padding: 8px 14px;
  letter-spacing: 0.04em;
}

.page-about-intro {
  margin-bottom: 72px;
}
.page-about-intro-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}
.page-about .section-kicker {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-purple);
  margin-bottom: 8px;
}
.page-about .section-title {
  font-family: var(--font-head);
  font-size: 32px;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--c-ink);
  margin: 0 0 18px;
}
.page-about .section-desc {
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-muted);
  max-width: 720px;
  margin-bottom: 0;
}
.page-about-intro-lead {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--c-ink);
  margin-bottom: 16px;
}
.page-about-intro-lead::first-letter {
  font-family: var(--font-head);
  font-size: 44px;
  font-weight: 800;
  float: left;
  line-height: 0.9;
  margin: 6px 10px 0 0;
  color: var(--about-red);
}
.page-about-intro-copy p:not(.section-kicker):not(.page-about-intro-lead) {
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-muted);
  margin-bottom: 14px;
}
.page-about-quote {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  border-left: 4px solid var(--c-blue);
  padding-left: 16px;
  margin: 28px 0 0;
  color: var(--c-ink);
}
.page-about-intro-figure {
  margin: 0;
  border: 1px solid var(--about-line);
  background: var(--c-white);
  padding: 8px 8px 0;
  box-shadow: 8px 8px 0 var(--c-bg-alt);
}
.page-about-intro-image {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about-figure-caption {
  font-family: var(--font-head);
  font-size: 13px;
  color: var(--c-muted);
  padding: 10px 4px 12px;
}

.page-about-milestones {
  margin-bottom: 80px;
}
.page-about-milestones-header {
  margin-bottom: 30px;
}
.page-about-milestones-art {
  margin: 26px 0 40px;
  border: 1px solid var(--about-line);
  background: var(--c-white);
  padding: 8px 8px 0;
}
.page-about-milestones-art img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about-timeline-wrap {
  overflow-x: auto;
  padding: 12px 0 8px;
}
.page-about-timeline-svg {
  display: block;
  width: 100%;
  min-width: 640px;
  height: auto;
}
.page-about-timeline-line {
  stroke: var(--about-line);
  stroke-width: 2;
  stroke-dasharray: 4 4;
}
.page-about-timeline-dot {
  fill: var(--c-white);
  stroke: var(--c-blue);
  stroke-width: 3;
}
.page-about-timeline-dot-current {
  fill: var(--c-white);
  stroke: var(--about-gold);
  stroke-width: 4;
}
.page-about-timeline-label {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  fill: var(--c-ink);
}
.page-about-timeline-label-current {
  fill: var(--about-red);
}

.page-about-timeline-nodes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 24px;
}
.page-about-version-node {
  background: var(--c-white);
  border: 1px solid var(--about-line);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.page-about-version-node[open] {
  border-color: var(--c-blue);
  box-shadow: 0 4px 0 var(--c-bg-alt);
}
.page-about-version-current[open] {
  border-color: var(--about-gold);
}
.page-about-version-summary {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: 18px 18px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  border-bottom: 1px solid transparent;
}
.page-about-version-summary::-webkit-details-marker {
  display: none;
}
.page-about-version-node[open] .page-about-version-summary {
  border-bottom-color: var(--c-bg-alt);
}
.page-about-version-tag {
  font-size: 20px;
  font-weight: 800;
  color: var(--c-ink);
  letter-spacing: -0.01em;
}
.page-about-version-current .page-about-version-tag {
  color: var(--about-red);
}
.page-about-version-caption {
  font-size: 13px;
  font-weight: 600;
  color: var(--c-muted);
  margin-top: 4px;
}
.page-about-version-body {
  padding: 6px 18px 18px;
}
.page-about-version-title {
  font-family: var(--font-head);
  font-size: 15px;
  font-weight: 700;
  margin: 12px 0 6px;
  color: var(--about-red);
}
.page-about-version-body p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
  margin: 0;
}

.page-about-promise {
  border-top: 3px solid var(--c-ink);
  padding-top: 48px;
}
.page-about-promise-header {
  margin-bottom: 28px;
}
.page-about-promise-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
.page-about-stat-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.page-about-stat-item {
  position: relative;
  background: var(--c-white);
  border-color: var(--about-line) !important;
  padding: 18px 18px 22px;
  margin: 0;
}
.page-about-stat-item::after {
  content: "";
  display: block;
  width: 38px;
  height: 4px;
  margin-top: 14px;
  background: var(--c-blue);
}
.page-about-stat-item:nth-child(2)::after {
  background: var(--c-purple);
}
.page-about-stat-item:nth-child(3)::after {
  background: var(--about-red);
}
.page-about-stat-item:nth-child(4)::after {
  background: var(--about-gold);
}
.page-about-stat-num {
  display: block;
  font-family: var(--font-head);
  font-size: 30px;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--c-ink);
}
.page-about-stat-text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--c-muted);
}

.page-about-commitment-title {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 800;
  margin: 0 0 16px;
  color: var(--c-ink);
}
.page-about-commitment-list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
}
.page-about-commitment-list li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-muted);
}
.page-about-commitment-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 10px;
  height: 10px;
  background: var(--c-blue);
  transform: rotate(45deg);
}
.page-about-commitment-list li:nth-child(2)::before {
  background: var(--c-purple);
}
.page-about-commitment-list li:nth-child(3)::before {
  background: var(--about-gold);
}
.page-about-commitment-list li:nth-child(4)::before {
  background: var(--about-red);
}
.page-about-promise-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about-more-link {
  margin-right: 0;
}
.page-about-promise-figure {
  margin: 34px 0 0;
  border: 1px solid var(--about-line);
  background: var(--c-white);
  padding: 8px 8px 0;
}
.page-about-promise-figure img {
  display: block;
  width: 100%;
  height: auto;
}

@media (min-width: 860px) {
  .page-about {
    padding: 44px 32px 120px;
  }
  .page-about-hero {
    margin-top: 40px;
    padding: 44px 40px 42px;
  }
  .page-about-hero-title {
    font-size: 56px;
  }
  .page-about-hero-deco {
    font-size: 26px;
    margin-top: 12px;
  }
  .page-about-hero-excerpt {
    font-size: 18px;
  }
  .page-about-intro-layout {
    grid-template-columns: 1fr 340px;
    gap: 44px;
  }
  .page-about-intro-figure {
    margin-top: 30px;
  }
  .page-about .section-title {
    font-size: 40px;
  }
  .page-about-timeline-nodes {
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
  }
  .page-about-version-summary {
    align-items: center;
    text-align: center;
  }
  .page-about-promise-grid {
    grid-template-columns: 1fr 1fr;
    gap: 44px;
  }
  .page-about-promise-figure {
    margin-top: 48px;
  }
}