.page-about {
  --about-green: #0B6E4F;
  --about-green-dark: #073B26;
  --about-orange: #F5A623;
  --about-blue: #1A3A5C;
  --about-ink: #111111;
  --about-gray-dark: #2D2D2D;
  --about-gray-mid: #6F6F6F;
  --about-gray-light: #D9D9D6;
  --about-off: #F4F4F2;
  --about-white: #FFFFFF;
  --about-radius: 16px;
  --about-ease: cubic-bezier(0.22, 1, 0.36, 1);
  --about-font-head: "Anton", "Arial Narrow", "Noto Sans SC", sans-serif;
  --about-font-body: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --about-font-index: "IBM Plex Mono", "Roboto Mono", monospace;
  position: relative;
  background-color: var(--about-off);
  background-image:
    linear-gradient(rgba(17, 17, 17, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(17, 17, 17, 0.045) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--about-ink);
  font-family: var(--about-font-body);
  overflow-x: hidden;
}

.page-about .container {
  padding-top: 28px;
}

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

.page-about .about-hero {
  position: relative;
  padding: 8px 0 48px;
  border-bottom: 1px solid var(--about-gray-light);
}

.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-family: var(--about-font-index);
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--about-green);
  font-weight: 600;
}

.page-about .about-hero__eyebrow::before {
  content: "";
  width: 26px;
  height: 3px;
  border-radius: 999px;
  background: var(--about-green);
}

.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--about-font-head);
  font-weight: 900;
  font-size: clamp(34px, 6vw, 56px);
  line-height: 1.1;
  letter-spacing: 0.02em;
}

.page-about .about-hero__lead {
  max-width: 760px;
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--about-gray-dark);
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-hero__meta span {
  background: var(--about-white);
  border: 1px solid var(--about-gray-light);
  border-radius: 999px;
  padding: 8px 16px;
  font-family: var(--about-font-index);
  font-size: 12px;
  color: var(--about-gray-dark);
}

.page-about .about-hero__accent {
  position: absolute;
  top: -20px;
  right: -20px;
  width: 160px;
  height: 160px;
  background: var(--about-green);
  opacity: 0.08;
  border-radius: 24px;
  transform: skewX(-18deg);
  pointer-events: none;
}

.page-about .about-toc {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  width: 100%;
  margin: 20px 0 32px;
  padding: 10px 14px;
  background: var(--about-white);
  border: 1px solid var(--about-gray-light);
  border-radius: 999px;
  box-shadow: 0 6px 20px rgba(17, 17, 17, 0.06);
  box-sizing: border-box;
}

.page-about .about-toc a {
  display: inline-block;
  font-family: var(--about-font-index);
  font-size: 13px;
  color: var(--about-gray-dark);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 999px;
  transition: background 0.2s ease, color 0.2s ease;
}

.page-about .about-toc a:hover,
.page-about .about-toc a:focus {
  background: var(--about-green);
  color: var(--about-white);
}

.page-about .about-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  padding: 56px 0 36px;
  border-bottom: 1px solid var(--about-gray-light);
}

.page-about .about-section__side {
  display: flex;
  align-items: flex-start;
}

.page-about .about-section__index {
  font-family: var(--about-font-index);
  font-size: 60px;
  font-weight: 600;
  line-height: 0.9;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--about-gray-mid);
  opacity: 0.45;
  letter-spacing: -0.02em;
}

.page-about .about-section__tag {
  display: inline-block;
  margin: 0 0 8px;
  font-family: var(--about-font-index);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--about-green);
  font-weight: 600;
}

.page-about .about-section__title {
  margin: 0 0 8px;
  font-family: var(--about-font-head);
  font-weight: 900;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.15;
}

.page-about .about-section__subtitle {
  margin: 0 0 28px;
  font-size: 15px;
  color: var(--about-gray-mid);
  line-height: 1.6;
}

.page-about .origin-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .origin-text p {
  margin: 0 0 16px;
  line-height: 1.8;
  color: var(--about-gray-dark);
}

.page-about .origin-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 28px;
}

.page-about .origin-fact {
  background: var(--about-white);
  border: 1px solid var(--about-gray-light);
  border-left: 3px solid var(--about-green);
  border-radius: 12px;
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.page-about .origin-fact__num {
  font-family: var(--about-font-index);
  font-size: 26px;
  font-weight: 600;
  color: var(--about-ink);
}

.page-about .origin-fact__label {
  font-size: 13px;
  line-height: 1.4;
  color: var(--about-gray-mid);
}

.page-about .image-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .image-frame--tilted {
  transform: rotate(-1.2deg);
}

.page-about .milestone-timeline {
  position: relative;
  margin-top: 8px;
}

.page-about .milestone-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(to bottom, var(--about-green) 0%, var(--about-gray-light) 100%);
}

.page-about .milestone-item {
  position: relative;
  margin-bottom: 28px;
  padding-left: 34px;
}

.page-about .milestone-item__marker {
  position: absolute;
  left: 0;
  top: 26px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--about-white);
  border: 3px solid var(--about-gray-mid);
  box-sizing: border-box;
  transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.page-about .milestone-item[data-revealed="true"] .milestone-item__marker,
.page-about .milestone-item--now .milestone-item__marker {
  background: var(--about-green);
  border-color: var(--about-green);
  box-shadow: 0 0 0 6px rgba(11, 110, 79, 0.14);
}

.page-about .milestone-item__card {
  background: var(--about-white);
  border: 1px solid var(--about-gray-light);
  border-left: 4px solid var(--about-gray-light);
  border-radius: var(--about-radius);
  padding: 20px 18px;
  box-shadow: 0 10px 30px rgba(17, 17, 17, 0.04);
  transition: transform 0.3s var(--about-ease), box-shadow 0.3s var(--about-ease), border-color 0.3s ease;
}

.page-about .milestone-item--now .milestone-item__card {
  border-left-color: var(--about-green);
}

.page-about .milestone-item__card:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 36px rgba(17, 17, 17, 0.07);
  border-color: rgba(11, 110, 79, 0.4);
}

.page-about .milestone-item__head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.page-about .milestone-item__year {
  display: inline-block;
  background: var(--about-ink);
  color: var(--about-white);
  border-radius: 999px;
  padding: 4px 12px;
  font-family: var(--about-font-index);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.page-about .milestone-item--now .milestone-item__year {
  background: var(--about-green);
}

.page-about .milestone-item__card h3 {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.3;
}

.page-about .milestone-item__card > p {
  margin: 0 0 12px;
  color: var(--about-gray-dark);
  line-height: 1.7;
  font-size: 15px;
}

.page-about .milestone-item__details {
  border-top: 1px dashed var(--about-gray-light);
  padding-top: 8px;
}

.page-about .milestone-item__details summary {
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--about-font-index);
  font-size: 12px;
  font-weight: 600;
  color: var(--about-green);
  padding: 4px 0;
}

.page-about .milestone-item__details summary::-webkit-details-marker {
  display: none;
}

.page-about .milestone-item__details summary::before {
  content: "+";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(11, 110, 79, 0.12);
  color: var(--about-green);
  font-size: 14px;
  line-height: 1;
}

.page-about .milestone-item__details[open] summary::before {
  content: "−";
}

.page-about .milestone-item__details .details-body ul {
  margin: 10px 0 4px;
  padding-left: 18px;
  color: var(--about-gray-dark);
  font-size: 14px;
  line-height: 1.8;
}

.page-about .capability-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .capability-chart {
  padding: 22px 18px;
  background: var(--about-white);
}

.page-about .capability-chart h3 {
  margin: 0 0 18px;
  font-size: 18px;
  font-family: var(--about-font-head);
  font-weight: 900;
}

.page-about .chart-row {
  display: grid;
  grid-template-columns: 84px 1fr;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.page-about .chart-row__label {
  font-family: var(--about-font-index);
  font-size: 12px;
  color: var(--about-gray-dark);
  white-space: nowrap;
}

.page-about .chart-row__track {
  height: 24px;
  border-radius: 6px;
  background: var(--about-off);
  overflow: hidden;
}

.page-about .chart-row__fill {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  height: 100%;
  min-width: 46px;
  padding-right: 8px;
  border-radius: 6px;
  background: linear-gradient(90deg, var(--about-green-dark), var(--about-green));
  color: var(--about-white);
  font-family: var(--about-font-index);
  font-size: 11px;
  font-weight: 600;
  box-sizing: border-box;
}

.page-about .capability-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .capability-list .image-frame {
  margin-bottom: 4px;
}

.page-about .capability-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--about-white);
  border: 1px solid var(--about-gray-light);
  border-radius: var(--about-radius);
  padding: 16px 18px;
}

.page-about .capability-item__num {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--about-ink);
  color: var(--about-white);
  font-family: var(--about-font-index);
  font-size: 13px;
  font-weight: 600;
}

.page-about .capability-item h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
}

.page-about .capability-item p {
  margin: 0;
  color: var(--about-gray-dark);
  font-size: 14px;
  line-height: 1.65;
}

.page-about .capability-list .btn {
  align-self: flex-start;
}

.page-about .local-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .local-text {
  background: var(--about-white);
  border: 1px solid var(--about-gray-light);
  border-left: 6px solid var(--about-green);
  border-radius: var(--about-radius);
  padding: 24px 20px;
}

.page-about .local-text p {
  color: var(--about-gray-dark);
  line-height: 1.8;
  margin: 0 0 14px;
}

.page-about .local-contact {
  list-style: none;
  margin: 18px 0 22px;
  padding: 14px 0 0;
  border-top: 1px dashed var(--about-gray-light);
}

.page-about .local-contact__item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--about-gray-light);
  font-size: 14px;
  color: var(--about-gray-dark);
}

.page-about .local-contact__item span {
  font-family: var(--about-font-index);
  font-size: 12px;
  color: var(--about-gray-mid);
}

.page-about .local-contact__item + .local-contact__item {
  border-bottom: 1px solid var(--about-gray-light);
}

.page-about .local-contact__item:last-child {
  border-bottom: none;
}

.page-about .about-outro {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-start;
  margin: 32px 0 56px;
  padding: 24px;
  background: var(--about-ink);
  border-radius: var(--about-radius);
  color: var(--about-white);
}

.page-about .about-outro__label {
  margin: 0;
  font-family: var(--about-font-index);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.7);
}

.page-about .about-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-outro__links a {
  display: inline-block;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: var(--about-white);
  text-decoration: none;
  font-size: 14px;
  background: transparent;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.page-about .about-outro__links a:hover,
.page-about .about-outro__links a:focus {
  background: var(--about-green);
  border-color: var(--about-green);
}

@media (min-width: 768px) {
  .page-about .container {
    padding-top: 40px;
  }

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

  .page-about .about-hero__title {
    font-size: clamp(44px, 5vw, 64px);
  }

  .page-about .about-hero__lead {
    font-size: 18px;
  }

  .page-about .about-section {
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 36px;
    padding: 72px 0 48px;
  }

  .page-about .about-section__index {
    font-size: 88px;
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: center;
  }

  .page-about .milestone-item__card {
    padding: 24px 26px;
  }

  .page-about .capability-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-about .local-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: center;
  }

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

@media (min-width: 1024px) {
  .page-about .about-toc {
    position: sticky;
    top: 96px;
    z-index: 20;
    width: fit-content;
    margin-left: auto;
    margin-right: 0;
  }

  .page-about .about-section {
    grid-template-columns: 180px minmax(0, 1fr);
  }

  .page-about .about-section__index {
    font-size: 104px;
  }

  .page-about .chart-row {
    grid-template-columns: 96px 1fr;
  }
}