.page-about {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
}

.page-about ::selection {
  background: var(--green);
  color: var(--white);
}

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

.page-about .about-topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.625rem;
  padding: 0.75rem 1.25rem;
  border-bottom: var(--border-thin);
  background: var(--paper);
}

.page-about .about-site-name {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1rem, 2.5vw, 1.375rem);
  letter-spacing: 0.03em;
  color: var(--ink);
}

.page-about .about-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-about .about-shanxi {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-family: var(--font-number);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: 0.25rem 0.5rem;
  background: var(--white);
}

.page-about .about-section {
  position: relative;
  display: block;
  padding: 2.5rem 1.25rem;
  border-bottom: var(--border-thick);
}

.page-about .about-section-marker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 3.5rem;
  height: 3.5rem;
  padding: 0 0.25rem;
  margin-bottom: 1.25rem;
  font-family: var(--font-number);
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--white);
  background: var(--green);
  border: 2px solid var(--ink);
  box-shadow: 4px 4px 0 var(--dark-green);
}

.page-about .about-section-body {
  position: relative;
  z-index: 1;
}

.page-about .about-overline {
  margin: 0 0 0.5rem;
  font-family: var(--font-number);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green);
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.page-about .about-overline::before {
  content: "";
  display: inline-block;
  width: 1.75rem;
  height: 3px;
  background: var(--orange);
  flex: 0 0 auto;
}

.page-about .about-section h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.02;
  letter-spacing: 0.005em;
}

.page-about .about-brand {
  background: var(--paper);
  overflow: hidden;
}

.page-about .about-brand::after {
  content: "LM";
  position: absolute;
  right: -2rem;
  top: 2rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(10rem, 25vw, 24rem);
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 2px rgba(14, 20, 18, 0.06);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-brand-body {
  display: grid;
  gap: 2rem;
}

.page-about .about-brand h1 {
  margin: 0.75rem 0 1.5rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(2.75rem, 7vw, 5.875rem);
  line-height: 0.95;
  letter-spacing: 0.01em;
}

.page-about .about-brand h1 span {
  display: block;
  color: var(--green);
  font-size: 0.62em;
  letter-spacing: 0.08em;
}

.page-about .about-brand-lead {
  margin: 0 0 1rem;
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-brand-desc {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--gray);
}

.page-about .about-comps {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.page-about .about-comp {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.0625rem;
  padding: 0.375rem 0.75rem;
  background: var(--white);
  border: 2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--grass);
  transition: transform 0.2s, box-shadow 0.2s;
}

.page-about .about-comp:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--green);
}

.page-about .about-comp b {
  font-family: var(--font-number);
  color: var(--orange);
}

.page-about .about-brand-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  margin-top: 1.75rem;
}

.page-about .about-brand-visual {
  position: relative;
}

.page-about .about-hero-img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: var(--border-thick);
  box-shadow: var(--shadow-hard);
  max-height: 640px;
}

.page-about .about-version-tag {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--orange);
  border: 2px solid var(--ink);
  box-shadow: 4px 4px 0 var(--dark-green);
}

.page-about .about-version-label {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink);
}

.page-about .about-version-number {
  font-family: var(--font-number);
  font-weight: 600;
  font-size: 1.125rem;
  padding: 0.125rem 0.375rem;
  color: var(--white);
  background: var(--ink);
}

.page-about .about-timeline {
  background: var(--white);
}

.page-about .about-timeline-intro {
  margin: 0;
  max-width: 48rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--gray);
}

.page-about .about-timeline-wrap {
  display: grid;
  gap: 2.5rem;
  margin-top: 2.25rem;
}

.page-about .about-timeline-list {
  list-style: none;
  margin: 0;
  padding: 0.25rem 0 0.25rem 2.75rem;
  border-left: 3px solid var(--ink);
}

.page-about .about-timeline-item {
  position: relative;
  margin-bottom: 2.25rem;
  outline: none;
}

.page-about .about-timeline-item:last-child {
  margin-bottom: 0;
}

.page-about .about-timeline-dot {
  position: absolute;
  left: calc(-2.75rem - 0.6875rem);
  top: 0.875rem;
  width: 0.875rem;
  height: 0.875rem;
  border-radius: 50%;
  background: var(--green);
  border: 3px solid var(--ink);
  box-shadow: 0 0 0 4px var(--grass);
  transition: background-color 0.2s, box-shadow 0.2s;
}

.page-about .about-timeline-item:hover .about-timeline-dot,
.page-about .about-timeline-item:focus-visible .about-timeline-dot {
  background: var(--orange);
  box-shadow: 0 0 0 6px rgba(255, 107, 53, 0.35);
}

.page-about .about-timeline-time {
  display: inline-block;
  font-family: var(--font-number);
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--ink);
  background: var(--grass);
  border: 1px solid var(--ink);
  padding: 0.2rem 0.625rem;
  letter-spacing: 0.02em;
}

.page-about .about-timeline-card {
  margin-top: 0.625rem;
  padding: 0.75rem 1rem;
  border: 2px solid transparent;
  border-left: 4px solid transparent;
  transition: border-color 0.2s, background-color 0.2s, transform 0.2s, box-shadow 0.2s;
}

.page-about .about-timeline-card h3 {
  margin: 0 0 0.375rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.375rem;
  line-height: 1.1;
}

.page-about .about-timeline-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--gray);
}

.page-about .about-timeline-item:hover .about-timeline-card,
.page-about .about-timeline-item:focus-visible .about-timeline-card {
  border-color: var(--ink);
  border-left-color: var(--orange);
  background: var(--paper);
  transform: translateX(0.375rem);
  box-shadow: var(--shadow-soft);
}

.page-about .about-timeline-img {
  display: block;
  width: 100%;
  max-width: 30rem;
  aspect-ratio: 1 / 2;
  object-fit: cover;
  border: var(--border-thick);
  box-shadow: var(--shadow-hard);
  justify-self: center;
}

.page-about .about-mechanism {
  background: var(--ink);
  color: var(--white);
  border-bottom: 3px solid var(--green);
}

.page-about .about-mechanism h2 {
  color: var(--white);
}

.page-about .about-mechanism .about-overline {
  color: var(--blue);
}

.page-about .about-mechanism .about-overline::before {
  background: var(--orange);
}

.page-about .about-mechanism-desc {
  margin: 0;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.8;
}

.page-about .about-mechanism-grid {
  display: grid;
  gap: 2rem;
}

.page-about .about-mechanism-flow {
  display: grid;
  gap: 1.125rem;
  margin-top: 1.75rem;
}

.page-about .about-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.1875rem 0.875rem;
  padding: 1.125rem 1.25rem;
  background: var(--white);
  color: var(--ink);
  border: 2px solid var(--ink);
  box-shadow: 5px 5px 0 var(--green);
  transition: transform 0.2s, box-shadow 0.2s;
}

.page-about .about-step:hover {
  transform: translate(-0.25rem, -0.25rem);
  box-shadow: 8px 8px 0 var(--green);
}

.page-about .about-step-num {
  grid-row: span 2;
  font-family: var(--font-number);
  font-weight: 600;
  font-size: 1.875rem;
  line-height: 1.1;
  color: var(--orange);
}

.page-about .about-step h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1.15;
}

.page-about .about-step p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--gray);
}

.page-about .about-mechanism-visual {
  display: grid;
  gap: 1.125rem;
  margin-top: 2.25rem;
  padding-top: 1.75rem;
  border-top: 1px solid rgba(255, 255, 255, 0.25);
}

.page-about .about-mechanism-img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 3px solid var(--white);
  box-shadow: 7px 7px 0 var(--green);
}

.page-about .about-mechanism-note {
  padding-left: 1.125rem;
  border-left: 4px solid var(--orange);
}

.page-about .about-mechanism-note p {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.125rem;
}

.page-about .about-mechanism-note span {
  display: block;
  margin-top: 0.25rem;
  font-family: var(--font-number);
  font-size: 0.875rem;
  color: var(--blue);
}

.page-about .about-stats {
  background: var(--paper);
}

.page-about .about-stats-intro {
  margin: 0;
  color: var(--gray);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-about .about-stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.125rem;
  margin-top: 2.25rem;
}

.page-about .about-stat-card {
  padding: 1.5rem 1.25rem;
  background: var(--white);
  border: var(--border-thick);
  box-shadow: var(--shadow-hard);
  display: grid;
  gap: 0.625rem;
  transition: transform 0.2s, box-shadow 0.2s;
}

.page-about .about-stat-card:hover {
  transform: translate(-0.25rem, -0.25rem);
  box-shadow: 9px 9px 0 var(--dark-green);
}

.page-about .about-stat-num {
  font-family: var(--font-number);
  font-weight: 700;
  line-height: 1;
  font-size: clamp(2.25rem, 6vw, 3.5rem);
  color: var(--green);
  letter-spacing: -0.02em;
}

.page-about .about-stat-plus,
.page-about .about-stat-unit {
  display: inline-block;
  margin-left: 0.05em;
  font-size: 0.65em;
  font-weight: 600;
  color: var(--orange);
}

.page-about .about-stat-card:nth-child(2) .about-stat-plus {
  color: var(--blue);
}

.page-about .about-stat-card:nth-child(4) {
  background: var(--grass);
}

.page-about .about-stat-card:nth-child(6) {
  background: var(--ink);
  border-color: var(--ink);
}

.page-about .about-stat-card:nth-child(6) .about-stat-num {
  color: var(--white);
}

.page-about .about-stat-card:nth-child(6) .about-stat-plus,
.page-about .about-stat-card:nth-child(6) .about-stat-unit {
  color: var(--blue);
}

.page-about .about-stat-card:nth-child(6) .about-stat-label {
  color: rgba(255, 255, 255, 0.72);
}

.page-about .about-stat-label {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--gray);
  line-height: 1.4;
}

.page-about .about-stats-note {
  margin-top: 2rem;
  padding: 1.25rem;
  background: var(--grass);
  border-left: 6px solid var(--green);
  border-top: 2px solid var(--green);
  border-bottom: 2px solid var(--green);
  border-right: 2px solid var(--green);
  font-size: 0.875rem;
  color: var(--ink);
  line-height: 1.8;
}

.page-about .about-stats-note p {
  margin: 0 0 0.375rem;
}

.page-about .about-stats-note p:last-child {
  margin-bottom: 0;
}

.page-about .about-cta {
  background: linear-gradient(135deg, var(--dark-green), var(--green));
  color: var(--white);
  padding: 3rem 1.25rem;
  border-bottom: var(--border-thick);
}

.page-about .about-cta-site {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.125rem, 3vw, 1.625rem);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--grass);
}

.page-about .about-cta h2 {
  margin: 0.75rem 0 1.5rem;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.05;
  color: var(--white);
}

.page-about .about-cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.875rem;
  align-items: center;
}

.page-about .about-cta .btn-outline {
  border-color: var(--white);
  color: var(--white);
  background: transparent;
}

.page-about .about-cta .btn-outline:hover {
  background: rgba(255, 255, 255, 0.15);
}

.page-about .about-cta-note {
  margin: 1.75rem 0 0;
  font-family: var(--font-number);
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.8);
}

@media (min-width: 720px) {
  .page-about .about-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 760px) {
  .page-about .about-cta {
    padding: 4.5rem 2rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-topbar {
    padding-left: 2rem;
    padding-right: 2rem;
  }

  .page-about .about-section {
    display: grid;
    grid-template-columns: 6rem minmax(0, var(--container-max)) 1fr;
    gap: 0 2rem;
    padding: 5rem 2rem;
  }

  .page-about .about-section-marker {
    grid-column: 1;
    justify-self: start;
    margin-bottom: 0;
  }

  .page-about .about-section-body {
    grid-column: 2;
  }
}

@media (min-width: 960px) {
  .page-about .about-brand-body {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 6fr);
    gap: 2.5rem;
    align-items: center;
  }

  .page-about .about-timeline-wrap {
    grid-template-columns: minmax(0, 1fr) minmax(0, 18rem);
    gap: 3rem;
    align-items: start;
  }

  .page-about .about-timeline-img {
    position: sticky;
    top: 6rem;
    max-width: none;
  }

  .page-about .about-mechanism-grid {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 3rem;
  }

  .page-about .about-mechanism-flow {
    margin-top: 0;
  }

  .page-about .about-mechanism-visual {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.35fr);
    align-items: center;
  }
}

@media (min-width: 1080px) {
  .page-about .about-stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}