.page-about {
  --about-muted: #6b6b6b;
  --about-card-shadow: 0 14px 34px rgba(38, 38, 38, 0.08);
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 32px 32px;
}

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

.page-about .breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 20px 0;
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  max-width: 1200px;
  margin: 28px 20px 56px;
  padding: 36px 22px 40px;
  color: #fff;
  background: linear-gradient(135deg, var(--kiwi), var(--emerald) 58%, var(--oasis) 130%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  width: 170px;
  height: 170px;
  right: -60px;
  top: -60px;
  border: 26px solid rgba(255, 255, 255, 0.13);
  border-radius: 50%;
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .section-index {
  color: var(--gold);
}

.page-about .about-hero h1 {
  margin: 14px 0 18px;
  font-family: var(--font-head);
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: #fff;
}

.page-about .about-hero .text-lead {
  max-width: 60ch;
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.92);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin-top: 34px;
  background: rgba(255, 255, 255, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.24);
}

.page-about .about-hero-stats div {
  padding: 16px 14px;
  background: rgba(38, 38, 38, 0.38);
}

.page-about .about-hero-stats dt {
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.78);
}

.page-about .about-hero-stats dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--gold);
  line-height: 1.2;
}

.page-about .about-hero-stats div:last-child dd {
  font-size: 14px;
  line-height: 1.5;
}

.page-about .about-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 20px;
}

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

.page-about .section-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--desert);
  margin-bottom: 10px;
}

.page-about .section-desc {
  max-width: 64ch;
  color: var(--gray);
  margin-top: 6px;
}

.page-about .about-origin-grid {
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-about .about-origin-copy p {
  margin: 0 0 16px;
  color: var(--gray);
  line-height: 1.85;
}

.page-about .about-origin-media {
  overflow: hidden;
  border: 1px solid var(--grid);
  background: var(--white);
}

.page-about .about-milestone-img {
  width: 100%;
  margin: 28px 0 40px;
  border: 1px solid var(--grid);
  background: var(--white);
}

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

.page-about .timeline-item {
  position: relative;
  padding: 0 0 44px 28px;
  border-left: 2px solid var(--grid);
  margin-left: 12px;
}

.page-about .timeline-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: -15px;
  top: 2px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--white);
  border: 7px solid var(--kiwi);
  box-shadow: 0 0 0 4px var(--paper);
  box-sizing: border-box;
}

.page-about .timeline-card {
  position: relative;
  padding: 22px 22px 22px 20px;
  background: var(--white);
  border: 1px solid var(--grid);
  box-shadow: var(--about-card-shadow);
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out);
}

.page-about .timeline-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 38px rgba(38, 38, 38, 0.12);
}

.page-about .timeline-card::after {
  content: attr(data-index);
  position: absolute;
  top: 14px;
  right: 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
}

.page-about .timeline-year {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--kiwi);
}

.page-about .timeline-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--gray);
}

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

.page-about .philosophy-card {
  position: relative;
  padding: 26px 22px;
  background: var(--white);
  border: 1px solid var(--grid);
  border-left: 6px solid var(--kiwi);
  box-shadow: var(--about-card-shadow);
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out);
}

.page-about .philosophy-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 38px rgba(38, 38, 38, 0.12);
}

.page-about .philosophy-card:nth-child(2n) {
  border-left-color: var(--gold);
}

.page-about .philosophy-card:nth-child(3n) {
  border-left-color: var(--oasis);
}

.page-about .philosophy-num {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--desert);
}

.page-about .philosophy-card h3 {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
}

.page-about .philosophy-card p {
  margin: 0;
  color: var(--gray);
  line-height: 1.75;
  font-size: 15px;
}

.page-about .about-news-link {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
  margin-top: 28px;
  padding: 20px 22px;
  background: rgba(201, 162, 39, 0.10);
  border: 1px solid var(--gold);
}

.page-about .about-news-link p {
  margin: 0;
  color: var(--ink);
  line-height: 1.7;
}

.page-about .about-tech-grid {
  display: grid;
  gap: 28px;
  align-items: start;
}

.page-about .about-tech-media {
  overflow: hidden;
  border: 1px solid var(--grid);
  background: var(--white);
}

.page-about .tech-list {
  display: grid;
  gap: 16px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .tech-list li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px 16px;
  background: var(--white);
  border: 1px solid var(--grid);
}

.page-about .tech-icon {
  flex: 0 0 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
  background: var(--oasis);
  border-radius: 2px;
}

.page-about .tech-list li:nth-child(1) .tech-icon { background: var(--oasis); }
.page-about .tech-list li:nth-child(2) .tech-icon { background: var(--desert); }
.page-about .tech-list li:nth-child(3) .tech-icon { background: var(--gold); }
.page-about .tech-list li:nth-child(4) .tech-icon { background: var(--kiwi); }

.page-about .tech-list h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 800;
}

.page-about .tech-list p {
  margin: 0;
  color: var(--gray);
  font-size: 14px;
  line-height: 1.7;
}

.page-about .about-license-panel {
  margin-top: 28px;
  padding: 28px 22px;
  background: var(--white);
  border: 1px solid var(--gold);
  box-shadow: var(--about-card-shadow);
}

.page-about .license-seal {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin-bottom: 18px;
  border: 2px solid var(--gold);
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  transform: rotate(-8deg);
}

.page-about .license-info p {
  margin: 0 0 10px;
  color: var(--gray);
  line-height: 1.7;
}

.page-about .license-icp {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--desert);
}

.page-about .license-info ul {
  margin: 12px 0 16px;
  padding-left: 20px;
  color: var(--gray);
  line-height: 1.8;
}

.page-about .about-cta {
  max-width: 1200px;
  margin: 48px auto 72px;
  padding: 48px 24px;
  text-align: center;
  background: var(--ink);
  border: 1px solid var(--kiwi);
}

.page-about .about-cta .section-title {
  color: var(--white);
}

.page-about .about-cta .section-index {
  color: var(--gold);
}

.page-about .about-cta p {
  max-width: 62ch;
  margin: 16px auto 24px;
  color: var(--grid);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
}

@media (min-width: 640px) {
  .page-about .about-hero {
    padding: 48px 32px;
  }

  .page-about .about-section {
    padding: 72px 32px;
  }

  .page-about .about-origin-grid {
    grid-template-columns: 1.1fr 0.9fr;
  }

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

  .page-about .about-tech-grid {
    grid-template-columns: 0.85fr 1.15fr;
  }

  .page-about .about-news-link {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .page-about .about-news-link p {
    margin: 0;
  }

  .page-about .about-license-panel {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 28px;
    align-items: center;
  }

  .page-about .license-seal {
    margin-bottom: 0;
  }
}

@media (min-width: 900px) {
  .page-about .breadcrumb {
    padding-left: 32px;
    padding-right: 32px;
  }

  .page-about .about-hero {
    margin: 48px auto 80px;
    width: calc(100% - 64px);
    padding: 60px 48px;
  }

  .page-about .about-hero-inner {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
  }

  .page-about .about-hero-stats {
    margin-top: 0;
  }

  .page-about .about-section {
    padding: 88px 32px;
  }

  .page-about .timeline {
    max-width: 880px;
    margin: 0 auto;
  }

  .page-about .timeline-item {
    padding-left: 48px;
    margin-left: 20px;
  }

  .page-about .timeline-item::before {
    left: -31px;
    width: 36px;
    height: 36px;
    border-width: 9px;
  }

  .page-about .timeline-card {
    padding: 26px 30px;
  }

  .page-about .philosophy-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .page-about .about-cta {
    margin-top: 64px;
    margin-bottom: 100px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition: none !important;
    animation: none !important;
  }
}