.page-about {
  --lg-about-gold-soft: rgba(201, 169, 97, 0.14);
  --lg-about-gold-line: rgba(201, 169, 97, 0.32);
  --lg-about-panel: rgba(10, 26, 63, 0.72);
  --lg-about-panel-deep: rgba(7, 16, 49, 0.86);
  --lg-about-text-dim: #9AA7B8;
  --lg-about-section-gap: clamp(72px, 10vw, 128px);
  color: var(--lg-text);
  min-width: 0;
  overflow: clip;
}

.page-about .lg-breadcrumb {
  max-width: var(--lg-container);
  margin: 0 auto;
  padding: 22px 32px 0;
}

.page-about .lg-breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
}

.page-about .lg-breadcrumb__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .lg-breadcrumb__item:not(:last-child)::after {
  content: "/";
  color: var(--lg-text-dim);
  opacity: 0.6;
}

.page-about .lg-breadcrumb__link {
  color: var(--lg-text-dim);
  text-decoration: none;
  transition: color 0.3s var(--lg-ease);
}

.page-about .lg-breadcrumb__link:hover {
  color: var(--lg-gold);
}

.page-about .lg-breadcrumb__current {
  color: var(--lg-gold);
  font-weight: 600;
}

.page-about__hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  max-width: var(--lg-container);
  margin: 0 auto;
  padding: clamp(48px, 7vw, 88px) 32px 0;
  position: relative;
}

.page-about__hero::before {
  content: "";
  position: absolute;
  top: 24px;
  right: 8%;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(74, 108, 247, 0.12) 0%, transparent 70%);
  filter: blur(12px);
  pointer-events: none;
  z-index: 0;
}

.page-about__hero-copy,
.page-about__hero-media {
  position: relative;
  z-index: 1;
}

.page-about__hero-title {
  font-size: clamp(34px, 4.6vw, 56px);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 16px 0 20px;
  color: var(--lg-text);
}

.page-about__hero-title-muted {
  color: var(--lg-gold);
  font-weight: 700;
}

.page-about__hero .lg-lead {
  font-size: clamp(16px, 1.5vw, 19px);
  line-height: 1.75;
  color: var(--lg-text-dim);
  max-width: 56rem;
  margin-bottom: 32px;
}

.page-about__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about__hero-media {
  border-radius: var(--lg-radius-l);
  overflow: hidden;
  box-shadow: var(--lg-shadow);
  position: relative;
}

.page-about__hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid var(--lg-about-gold-line);
  border-radius: inherit;
  pointer-events: none;
}

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

.page-about__overview {
  max-width: var(--lg-container);
  margin: var(--lg-about-section-gap) auto 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding: clamp(28px, 4vw, 48px);
  background: var(--lg-about-panel);
  border-radius: var(--lg-radius-l);
  backdrop-filter: blur(10px);
  border: 1px solid var(--lg-about-gold-line);
}

.page-about__overview-text .lg-kicker {
  margin-bottom: 14px;
}

.page-about__section-title {
  font-size: clamp(26px, 3.2vw, 40px);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.2;
  margin: 10px 0 18px;
}

.page-about__overview-text p {
  color: var(--lg-text-dim);
  line-height: 1.75;
  font-size: 16px;
  margin-bottom: 16px;
  max-width: 62ch;
}

.page-about__overview-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin: 0;
}

.page-about__fact {
  background: rgba(201, 169, 97, 0.07);
  border: 1px solid var(--lg-about-gold-line);
  border-radius: var(--lg-radius-m);
  padding: 22px 18px;
  margin: 0;
}

.page-about__fact-label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--lg-text-dim);
  margin-bottom: 8px;
}

.page-about__fact-value {
  font-size: 18px;
  font-weight: 700;
  color: var(--lg-text);
  line-height: 1.4;
}

.page-about__fact-value .lg-num {
  font-size: 28px;
  margin-right: 4px;
}

.page-about__milestones {
  max-width: var(--lg-container);
  margin: var(--lg-about-section-gap) auto 0;
  padding: 0 32px;
}

.page-about__milestones-head {
  margin-bottom: clamp(40px, 5vw, 64px);
}

.page-about__milestones-desc,
.page-about__optimization-desc {
  color: var(--lg-text-dim);
  line-height: 1.7;
  max-width: 58ch;
  font-size: 16px;
}

.page-about__timeline {
  position: relative;
  display: grid;
  gap: 0;
}

.page-about__timeline-marker {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 0 0 4px;
}

.page-about__timeline-dot {
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--lg-gold);
  box-shadow: 0 0 0 6px var(--lg-about-gold-soft), 0 0 20px rgba(201, 169, 97, 0.3);
}

.page-about__timeline-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--lg-about-gold-line) 0%, transparent 100%);
}

.page-about__timeline-card {
  background: var(--lg-about-panel);
  border: 1px solid var(--lg-about-gold-line);
  border-radius: var(--lg-radius-m);
  padding: 24px 24px 28px;
  margin: 0 0 44px 34px;
  position: relative;
}

.page-about__timeline-card::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 0;
  width: 3px;
  height: 100%;
  border-radius: 0 4px 4px 0;
  background: linear-gradient(180deg, var(--lg-gold) 0%, transparent 100%);
}

.page-about__timeline-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--lg-gold);
  background: var(--lg-about-gold-soft);
  border: 1px solid var(--lg-about-gold-line);
  border-radius: var(--lg-radius-pill);
  padding: 5px 14px;
  margin-bottom: 14px;
}

.page-about__timeline-title {
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 700;
  margin: 0 0 10px;
  line-height: 1.3;
}

.page-about__timeline-card p {
  color: var(--lg-text-dim);
  font-size: 15px;
  line-height: 1.7;
  margin: 0;
}

.page-about__milestones-image {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--lg-radius-m);
  border: 1px solid var(--lg-about-gold-line);
  margin-top: 20px;
}

.page-about__optimization {
  max-width: var(--lg-container);
  margin: var(--lg-about-section-gap) auto 0;
  padding: 0 32px;
}

.page-about__optimization-head {
  margin-bottom: 36px;
}

.page-about__filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-about__filter {
  appearance: none;
  border: 1px solid var(--lg-about-gold-line);
  background: transparent;
  color: var(--lg-text-dim);
  font-family: "Montserrat", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  font-weight: 600;
  padding: 9px 20px;
  border-radius: var(--lg-radius-pill);
  cursor: pointer;
  transition: all 0.3s var(--lg-ease);
}

.page-about__filter:hover {
  color: var(--lg-gold);
  border-color: var(--lg-gold);
}

.page-about__filter.is-active {
  background: var(--lg-gold);
  border-color: var(--lg-gold);
  color: var(--lg-primary-deep);
}

.page-about__archive {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about__archive-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
  background: var(--lg-about-panel);
  border: 1px solid var(--lg-about-gold-line);
  border-radius: var(--lg-radius-m);
  padding: 24px;
  transition: border-color 0.3s var(--lg-ease), transform 0.3s var(--lg-ease);
}

.page-about__archive-card:hover {
  border-color: var(--lg-gold);
  transform: translateX(4px);
}

.page-about__archive-index {
  font-family: "Montserrat", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 32px;
  font-weight: 800;
  color: var(--lg-gold);
  opacity: 0.7;
  line-height: 1;
  min-width: 44px;
}

.page-about__archive-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--lg-gold);
  background: var(--lg-about-gold-soft);
  border-radius: var(--lg-radius-pill);
  padding: 4px 12px;
  margin-bottom: 8px;
}

.page-about__archive-title {
  font-size: 19px;
  font-weight: 700;
  margin: 0 0 8px;
  line-height: 1.3;
}

.page-about__archive-body p {
  color: var(--lg-text-dim);
  font-size: 15px;
  line-height: 1.7;
  margin: 0;
}

.page-about__chart {
  margin-top: 24px;
  border-radius: var(--lg-radius-m);
  overflow: hidden;
  border: 1px solid var(--lg-about-gold-line);
}

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

.page-about__commitment {
  max-width: var(--lg-container);
  margin: var(--lg-about-section-gap) auto 0;
  padding: 0 32px;
}

.page-about__commitment-frame {
  padding: clamp(28px, 4vw, 48px);
  background: linear-gradient(135deg, var(--lg-about-panel) 0%, var(--lg-about-panel-deep) 100%);
  border-radius: var(--lg-radius-l);
}

.page-about__commitment-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 28px;
}

.page-about__commitment-item {
  border-top: 1px solid var(--lg-about-gold-line);
  padding: 22px 0 6px;
}

.page-about__commitment-num {
  font-family: "Montserrat", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 38px;
  font-weight: 800;
  color: var(--lg-gold);
  opacity: 0.5;
  display: block;
  margin-bottom: 8px;
  line-height: 1;
}

.page-about__commitment-item h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 0 0 10px;
}

.page-about__commitment-item p {
  color: var(--lg-text-dim);
  line-height: 1.7;
  font-size: 15px;
  margin: 0;
}

.page-about__credentials {
  max-width: var(--lg-container);
  margin: var(--lg-about-section-gap) auto 0;
  padding: 0 32px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about__credentials-copy p {
  color: var(--lg-text-dim);
  line-height: 1.75;
  font-size: 16px;
  margin-bottom: 14px;
}

.page-about__badges {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about__badge {
  background: var(--lg-about-panel);
  border: 1px solid var(--lg-about-gold-line);
  border-radius: var(--lg-radius-m);
  padding: 22px 20px;
  display: grid;
  gap: 6px;
}

.page-about__badge-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--lg-gold);
}

.page-about__badge-sub {
  font-size: 13px;
  color: var(--lg-text-dim);
  line-height: 1.5;
}

.page-about__links {
  max-width: var(--lg-container);
  margin: var(--lg-about-section-gap) auto 0;
  padding: 0 32px var(--lg-about-section-gap);
}

.page-about__links-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 24px;
}

.page-about__link-card {
  display: block;
  background: var(--lg-about-panel);
  border: 1px solid var(--lg-about-gold-line);
  border-radius: var(--lg-radius-m);
  padding: 22px 20px;
  text-decoration: none;
  transition: border-color 0.3s var(--lg-ease), box-shadow 0.3s var(--lg-ease);
}

.page-about__link-card:hover {
  border-color: var(--lg-gold);
  box-shadow: 0 10px 30px rgba(3, 8, 24, 0.35);
}

.page-about__link-title {
  display: block;
  font-size: 17px;
  font-weight: 700;
  color: var(--lg-text);
  margin-bottom: 6px;
}

.page-about__link-desc {
  display: block;
  font-size: 14px;
  color: var(--lg-text-dim);
  line-height: 1.6;
}

.page-about__timeline-item:last-child .page-about__timeline-line {
  background: linear-gradient(90deg, var(--lg-about-gold-line) 0%, transparent 100%);
}

@media (min-width: 640px) {
  .page-about__overview-facts {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about__commitment-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }

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

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

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

@media (min-width: 960px) {
  .page-about__hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: 56px;
  }

  .page-about__hero-media {
    order: 2;
  }

  .page-about__overview {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 48px;
    align-items: center;
  }

  .page-about__timeline {
    grid-template-columns: auto 1fr;
  }

  .page-about__timeline-marker {
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 0 24px 0 0;
    position: relative;
  }

  .page-about__timeline-dot {
    flex: 0 0 auto;
    margin: 18px 0;
  }

  .page-about__timeline-line {
    flex: 1;
    width: 1px;
    height: auto;
    background: linear-gradient(180deg, transparent 0%, var(--lg-about-gold-line) 20%, var(--lg-about-gold-line) 80%, transparent 100%);
  }

  .page-about__timeline-card {
    margin: 0 0 36px 0;
  }

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

  .page-about__archive-card--wide {
    grid-column: span 2;
  }

  .page-about__credentials {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about__badges {
    grid-template-columns: 1fr;
  }

  .page-about__links-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1200px) {
  .page-about__milestones {
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 48px;
    padding: 0 32px;
  }

  .page-about__milestones-head {
    margin-bottom: 0;
    padding-right: 32px;
  }

  .page-about__milestones-image {
    grid-column: 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about__archive-card,
  .page-about__link-card {
    transition: none;
  }
}