.page-about {
  background: var(--bg-gray);
  color: var(--text);
}

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 40px 0 56px;
  background: var(--gradient-blue);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 32px 32px, 32px 32px;
}

.page-about .about-hero::before,
.page-about .about-hero::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
}

.page-about .about-hero::before {
  top: -120px;
  right: -80px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.22), transparent 62%);
}

.page-about .about-hero::after {
  bottom: -140px;
  left: 10%;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(42, 74, 127, 0.5), transparent 60%);
}

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

.page-about .about-hero-copy {
  max-width: 680px;
  color: var(--white);
}

.page-about .about-hero-copy h1 {
  margin: 14px 0 18px;
  font-family: var(--font-heading);
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.14;
  letter-spacing: -0.02em;
}

.page-about .about-hero-desc {
  max-width: 560px;
  font-size: 16px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.84);
}

.page-about .about-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin-top: 26px;
}

.page-about .mono-tag {
  display: inline-block;
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-light);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: var(--radius-pill);
}

.page-about .about-hero-lines {
  display: none;
}

.page-about .about-origin {
  padding: 48px 0 40px;
}

.page-about .about-origin h2,
.page-about .about-data h2 {
  margin: 8px 0 16px;
  font-family: var(--font-heading);
  font-size: clamp(21px, 3vw, 28px);
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--primary);
}

.page-about .mono-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--accent);
}

.page-about .aside-note {
  max-width: 210px;
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-aux);
}

.page-about .about-figure {
  margin: 26px 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

.page-about .about-figure figcaption {
  margin-top: 12px;
  padding-left: 12px;
  border-left: 2px solid var(--accent);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-aux);
}

.page-about .about-milestones {
  padding: 56px 0;
}

.page-about .about-milestones .section-title,
.page-about .about-commit .section-title {
  color: var(--white);
}

.page-about .timeline {
  position: relative;
  margin-top: 40px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, rgba(255, 107, 53, 0.7), rgba(255, 255, 255, 0.2));
}

.page-about .timeline-item {
  position: relative;
  padding-left: 60px;
  margin-bottom: 24px;
}

.page-about .timeline-mark {
  position: absolute;
  left: 0;
  top: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--white);
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(255, 107, 53, 0.2);
}

.page-about .timeline-body {
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
}

.page-about .timeline-body h3 {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-size: 17px;
  color: var(--white);
}

.page-about .timeline-body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.76);
}

.page-about .timeline-link {
  color: var(--accent-light);
  text-underline-offset: 3px;
  text-decoration: underline;
}

.page-about .about-growth {
  max-width: 640px;
  margin-top: 40px;
}

.page-about .about-milestones .about-figure figcaption {
  color: rgba(255, 255, 255, 0.65);
}

.page-about .about-data {
  padding: 48px 0 40px;
}

.page-about .data-flow {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .data-flow-step {
  padding: 16px 18px;
  background: var(--white);
  border: 1px solid rgba(26, 42, 74, 0.1);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.page-about .data-flow-step h3 {
  margin: 8px 0 6px;
  font-family: var(--font-heading);
  font-size: 16px;
  color: var(--primary);
}

.page-about .data-flow-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-aux);
}

.page-about .data-claim {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 26px;
}

.page-about .data-claim .claim-item:last-child {
  grid-column: 1 / -1;
}

.page-about .claim-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px 8px;
  text-align: center;
  border-radius: var(--radius);
  background: var(--gradient-blue);
  color: var(--white);
}

.page-about .claim-value {
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: clamp(18px, 3vw, 24px);
  font-weight: 700;
  color: var(--accent-light);
}

.page-about .claim-label {
  font-size: 12px;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.75);
}

.page-about .about-commit {
  padding: 56px 0;
}

.page-about .commit-grid {
  display: grid;
  gap: 14px;
  margin-top: 36px;
}

.page-about .commit-card {
  padding: 22px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
}

.page-about .commit-card h3 {
  margin: 10px 0 8px;
  font-family: var(--font-heading);
  font-size: 17px;
  color: var(--white);
}

.page-about .commit-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.74);
}

.page-about .about-commit-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 64px 0 88px;
  }

  .page-about .about-hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    align-items: center;
    gap: 40px;
  }

  .page-about .about-hero-lines {
    display: block;
    width: 100%;
    height: auto;
  }

  .page-about .about-origin,
  .page-about .about-data {
    padding: 72px 0;
  }

  .page-about .about-origin .about-figure {
    max-width: 92%;
  }

  .page-about .about-data .about-figure {
    max-width: 88%;
    margin-left: auto;
  }

  .page-about .timeline-item {
    margin-bottom: 32px;
  }

  .page-about .timeline-body {
    max-width: 640px;
  }

  .page-about .data-claim {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .data-claim .claim-item:last-child {
    grid-column: auto;
  }

  .page-about .data-flow {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }

  .page-about .data-flow-step {
    transition: transform var(--transition), box-shadow var(--transition);
  }

  .page-about .data-flow-step:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
  }

  .page-about .commit-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .page-about .commit-card {
    transition: background var(--transition), border-color var(--transition);
  }

  .page-about .commit-card:hover {
    background: rgba(255, 255, 255, 0.09);
    border-color: rgba(255, 107, 53, 0.4);
  }

  .page-about .about-commit-cta {
    gap: 18px;
  }
}