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

.page-about .breadcrumb {
  padding-top: 0.9rem;
  padding-bottom: 0.2rem;
  font-size: 0.85rem;
}

.page-about .section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-data);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lm-orange);
  border: 1px solid var(--lm-orange);
  padding: 0.3rem 0.65rem;
}

.page-about .label-num {
  color: var(--lm-blue);
}

.page-about .section-title {
  font-family: var(--font-heading);
  font-size: 1.7rem;
  font-weight: 900;
  line-height: 1.3;
  margin: 0.85rem 0 0.6rem;
}

.page-about .section-desc {
  color: var(--lm-dark-gray);
  line-height: 1.65;
  max-width: 640px;
  margin: 0;
}

/* ===== 品牌简介 Hero ===== */
.page-about .about-hero {
  position: relative;
  padding: 3rem 0 4.5rem;
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    var(--lm-blue);
  background-size: 26px 26px;
  color: var(--lm-white);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.45rem;
  height: 0.9rem;
  background: linear-gradient(115deg, var(--lm-orange) 0 20%, var(--lm-yellow) 20% 32%, var(--lm-blue) 32% 100%);
  transform: skewY(-1.6deg);
}

.page-about .about-hero .section-label {
  border-color: var(--lm-orange);
  color: var(--lm-yellow);
}

.page-about .about-hero .section-label .label-num {
  color: var(--lm-orange);
}

.page-about .hero-title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1.2;
  margin: 1rem 0 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--lm-orange);
  display: inline-block;
}

.page-about .hero-lead {
  font-size: 1.1rem;
  line-height: 1.65;
  color: var(--lm-white);
  background: rgba(255, 214, 10, 0.12);
  border-left: 3px solid var(--lm-yellow);
  padding: 0.65rem 1rem;
  margin: 0 0 1rem;
}

.page-about .hero-text {
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.75;
  margin: 0;
}

.page-about .hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem 1.8rem;
  margin: 1.5rem 0 1.6rem;
}

.page-about .hero-stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.page-about .hero-stat .stat-num {
  font-family: var(--font-data);
  font-size: 2.3rem;
  font-weight: 700;
  line-height: 1;
  color: var(--lm-yellow);
}

.page-about .hero-stat .stat-label {
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.78);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .about-hero .btn-ghost {
  border-color: rgba(255, 255, 255, 0.6);
  color: var(--lm-white);
}

.page-about .about-hero .btn-ghost:hover {
  border-color: var(--lm-yellow);
  color: var(--lm-yellow);
}

.page-about .hero-figure {
  position: relative;
  margin: 2.25rem 0 0;
}

.page-about .hero-frame {
  background: var(--lm-white);
  border: 1px solid var(--lm-warm-gray);
  box-shadow: var(--shadow-2);
  padding: 0.5rem;
}

.page-about .hero-frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
}

.page-about .hero-badge {
  position: absolute;
  top: -0.8rem;
  right: 0.75rem;
  z-index: 1;
  background: var(--lm-orange);
  color: var(--lm-white);
  font-family: var(--font-data);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 0.3rem 0.6rem;
  box-shadow: var(--shadow-1);
}

.page-about .figure-caption {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.75);
  border-left: 2px solid var(--lm-orange);
  padding-left: 0.7rem;
  margin-top: 0.7rem;
  line-height: 1.55;
}

/* ===== 发展里程碑 ===== */
.page-about .milestone-section {
  background: var(--lm-off-white);
  padding: 3.5rem 0;
}

.page-about .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.5rem 0 2.25rem;
  padding-top: 0.25rem;
}

.page-about .filter-btn {
  background: transparent;
  border: 1px solid var(--lm-blue);
  color: var(--lm-blue);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.45rem 1rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.page-about .filter-btn:hover {
  border-color: var(--lm-orange);
  color: var(--lm-orange);
}

.page-about .filter-btn.is-active {
  background: var(--lm-orange);
  border-color: var(--lm-orange);
  color: var(--lm-white);
}

.page-about .timeline {
  position: relative;
  padding-left: 2.5rem;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 0.65rem;
  top: 0.6rem;
  bottom: 1.25rem;
  width: 2px;
  background: linear-gradient(var(--lm-blue), var(--lm-orange));
}

.page-about .timeline-item {
  position: relative;
  margin-bottom: 1.1rem;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: -2.5rem;
  top: 1.1rem;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background: var(--lm-yellow);
  border: 3px solid var(--lm-blue);
  transition: transform var(--transition), background var(--transition);
}

.page-about .timeline-item[open]::before {
  transform: scale(1.2);
  background: var(--lm-orange);
}

.page-about .timeline-summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: var(--lm-white);
  border: 1px solid var(--lm-warm-gray);
  border-left: 4px solid var(--lm-orange);
  box-shadow: var(--shadow-1);
  padding: 0.85rem 1rem;
  transition: box-shadow var(--transition), transform var(--transition);
}

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

.page-about .timeline-item[open] .timeline-summary {
  box-shadow: var(--shadow-2);
}

@media (min-width: 768px) {
  .page-about .timeline-item:nth-child(even) .timeline-summary {
    transform: rotate(-0.35deg);
  }

  .page-about .timeline-item:nth-child(odd) .timeline-summary {
    transform: rotate(0.35deg);
  }

  .page-about .timeline-item:hover .timeline-summary {
    transform: rotate(0deg);
  }
}

.page-about .timeline-year {
  font-family: var(--font-data);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--lm-blue);
  background: var(--lm-gray);
  padding: 0.3rem 0.55rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.page-about .timeline-main {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.page-about .timeline-tag {
  font-family: var(--font-data);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--lm-orange);
}

.page-about .timeline-name {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--lm-ink);
  line-height: 1.3;
}

.page-about .timeline-mark {
  margin-left: auto;
  font-family: var(--font-data);
  font-size: 1.1rem;
  color: var(--lm-orange);
  font-weight: 700;
  transition: transform var(--transition);
}

.page-about .timeline-item[open] .timeline-mark {
  transform: rotate(45deg);
}

.page-about .timeline-detail {
  background: var(--lm-white);
  border: 1px solid var(--lm-warm-gray);
  border-top: 0;
  padding: 0.8rem 1rem 1rem;
  margin-bottom: 0.4rem;
}

.page-about .timeline-detail p {
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--lm-dark-gray);
  margin: 0 0 0.6rem;
}

.page-about .timeline-link {
  display: inline-block;
  color: var(--lm-orange);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition);
}

.page-about .timeline-link:hover {
  border-bottom-color: var(--lm-orange);
}

/* ===== 数据与内容团队 ===== */
.page-about .team-section {
  background: var(--lm-white);
  padding: 3.5rem 0;
}

.page-about .team-roles {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

@media (min-width: 768px) {
  .page-about .team-roles {
    grid-template-columns: repeat(3, 1fr);
  }
}

.page-about .role-card {
  position: relative;
  background: var(--lm-off-white);
  border: 1px solid var(--lm-warm-gray);
  padding: 1.4rem;
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.page-about .role-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 4px;
}

.page-about .role-card--blue::before {
  background: var(--lm-blue);
}

.page-about .role-card--orange::before {
  background: var(--lm-orange);
}

.page-about .role-card--yellow::before {
  background: var(--lm-yellow);
}

.page-about .role-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2);
}

.page-about .role-index {
  display: block;
  font-family: var(--font-data);
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1;
  color: var(--lm-orange);
  opacity: 0.35;
  margin-bottom: 0.8rem;
}

.page-about .role-card--blue .role-index {
  color: var(--lm-blue);
}

.page-about .role-card h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  margin: 0 0 0.6rem;
  color: var(--lm-ink);
}

.page-about .role-card p {
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--lm-dark-gray);
  margin: 0;
}

.page-about .team-media {
  display: grid;
  gap: 1.5rem;
  margin-top: 2.25rem;
}

@media (min-width: 768px) {
  .page-about .team-media {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

.page-about .data-frame,
.page-about .people-frame {
  background: var(--lm-white);
  border: 1px solid var(--lm-warm-gray);
  box-shadow: var(--shadow-1);
  padding: 0.5rem;
}

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

.page-about .data-frame img {
  aspect-ratio: 8 / 5;
}

.page-about .people-frame img {
  aspect-ratio: 4 / 3;
}

.page-about .team-media figcaption {
  font-size: 0.82rem;
  color: var(--lm-dark-gray);
  line-height: 1.55;
  margin-top: 0.55rem;
}

@media (min-width: 1024px) {
  .page-about .people-figure {
    margin-top: 2.5rem;
  }
}

/* ===== 资质与合作 ===== */
.page-about .credibility-section {
  background: var(--lm-off-white);
  padding: 3.5rem 0;
}

.page-about .credibility-grid {
  display: grid;
  gap: 1rem;
  margin-top: 2rem;
}

@media (min-width: 768px) {
  .page-about .credibility-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .page-about .credibility-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.page-about .credibility-card {
  background: var(--lm-white);
  border-top: 3px solid var(--lm-orange);
  box-shadow: var(--shadow-1);
  padding: 1.4rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

.page-about .credibility-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-2);
}

.page-about .credibility-card--highlight {
  background: var(--lm-blue);
  border-top-color: var(--lm-yellow);
  color: var(--lm-white);
}

.page-about .credibility-card--highlight h3 {
  color: var(--lm-white);
}

.page-about .credibility-card--highlight p {
  color: rgba(255, 255, 255, 0.8);
}

.page-about .credibility-card--highlight .credibility-icon {
  color: var(--lm-yellow);
}

.page-about .credibility-icon {
  display: block;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--lm-orange);
  margin-bottom: 0.7rem;
}

.page-about .credibility-card h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--lm-ink);
  margin: 0 0 0.55rem;
}

.page-about .credibility-card p {
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--lm-dark-gray);
  margin: 0;
}

/* ===== 底部引导 CTA ===== */
.page-about .about-cta {
  position: relative;
  background: var(--lm-blue);
  color: var(--lm-white);
  padding: 3.5rem 0;
  overflow: hidden;
}

.page-about .about-cta::before {
  content: "";
  position: absolute;
  right: -3rem;
  top: -3rem;
  width: 11rem;
  height: 11rem;
  background: var(--lm-orange);
  opacity: 0.14;
  transform: rotate(45deg);
}

.page-about .cta-inner {
  position: relative;
  max-width: 720px;
}

.page-about .about-cta .section-label {
  border-color: var(--lm-yellow);
  color: var(--lm-yellow);
}

.page-about .about-cta .section-label .label-num {
  color: var(--lm-yellow);
}

.page-about .cta-inner h2 {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 900;
  line-height: 1.3;
  margin: 1rem 0 0.7rem;
}

.page-about .cta-inner > p {
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.7;
  margin: 0;
}

.page-about .cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

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

.page-about .about-cta .btn-outline:hover {
  background: var(--lm-white);
  color: var(--lm-blue);
}

.page-about .about-cta .btn-ghost {
  border-color: transparent;
  color: rgba(255, 255, 255, 0.85);
}

.page-about .about-cta .btn-ghost:hover {
  border-color: currentColor;
  color: var(--lm-yellow);
}

/* ===== 桌面端增强 ===== */
@media (min-width: 768px) {
  .page-about .about-hero {
    padding: 4rem 0 5rem;
  }

  .page-about .hero-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 3rem;
    align-items: center;
  }

  .page-about .hero-figure {
    margin: 0;
  }

  .page-about .hero-title {
    font-size: 2.6rem;
  }

  .page-about .section-title {
    font-size: 2rem;
  }

  .page-about .milestone-section,
  .page-about .team-section,
  .page-about .credibility-section,
  .page-about .about-cta {
    padding: 4.5rem 0;
  }
}

@media (min-width: 1024px) {
  .page-about .hero-figure {
    transform: rotate(1deg);
    transition: transform var(--transition);
  }

  .page-about .hero-figure:hover {
    transform: rotate(0deg);
  }

  .page-about .timeline {
    padding-left: 3rem;
  }

  .page-about .timeline::before {
    left: 0.9rem;
  }

  .page-about .timeline-item::before {
    left: -3rem;
  }
}