.page-about {
  color: var(--c-ink);
}

/* ===== 页头横幅 ===== */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  color: rgba(255, 255, 255, 0.94);
  background:
    linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px) 0 0 / 100% 32px,
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px) 0 0 / 48px 100%,
    radial-gradient(ellipse at 88% 18%, rgba(46, 139, 87, 0.48), transparent 62%),
    linear-gradient(135deg, #163b2d 0%, #1f4f3e 52%, #102b20 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 42%;
  height: 6px;
  background: linear-gradient(90deg, transparent, var(--c-accent));
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent) 0%, rgba(212, 175, 55, 0.12) 70%, transparent 100%);
}

.page-about .about-hero-shell {
  max-width: var(--container);
  margin-inline: auto;
  padding: clamp(1.5rem, 3vw, 2.5rem) var(--gutter) clamp(2.5rem, 5vw, 4rem);
}

.page-about .about-breadcrumb {
  font-family: var(--font-head);
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.52);
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-breadcrumb a {
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  transition: color var(--transition);
}

.page-about .about-breadcrumb a:hover {
  color: var(--c-accent-light);
}

.page-about .about-hero-eyebrow {
  margin: 0 0 0.75rem;
  font-family: var(--font-head);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-accent-light);
}

.page-about .about-hero-title {
  margin: 0 0 1.25rem;
  max-width: 16em;
  font-size: var(--size-h1);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: #ffffff;
}

.page-about .about-hero-desc {
  max-width: 42rem;
  margin: 0 0 2rem;
  font-size: var(--size-body);
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.82);
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  max-width: 36rem;
  margin: 0 0 1.75rem;
  padding: 1.25rem 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.07);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.14);
}

.page-about .about-hero-stat {
  min-width: 0;
}

.page-about .about-hero-stat dt {
  font-family: var(--font-head);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 0.25rem;
}

.page-about .about-hero-stat dd {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 900;
  line-height: 1.1;
  color: var(--c-accent);
}

.page-about .about-hero-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
}

.page-about .about-hero-tabs a {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  color: #ffffff;
  font-family: var(--font-head);
  font-size: 0.875rem;
  text-decoration: none;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.page-about .about-hero-tabs a:hover,
.page-about .about-hero-tabs a:focus-visible {
  background: rgba(255, 255, 255, 0.16);
  border-color: var(--c-accent);
  transform: translateY(-2px);
}

/* ===== 使命 ===== */
.page-about .about-mission-grid {
  display: grid;
  gap: 1.75rem;
  align-items: center;
}

.page-about .about-mission-copy p {
  line-height: 1.8;
}

.page-about .about-mission-lead,
.page-about .about-timeline-body p {
  font-family: var(--font-body);
}

.page-about .about-mission-lead {
  margin: 0 0 1rem;
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--c-primary);
}

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

.page-about .about-mission-figure img,
.page-about .about-timeline-figure img,
.page-about .about-team-figure img {
  max-width: 100%;
  height: auto;
}

.page-about .about-mission-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

.page-about .about-mission-figure .figure-caption,
.page-about .about-timeline-figure .figure-caption,
.page-about .about-team-figure .figure-caption {
  margin-top: 0.65rem;
  font-size: 0.875rem;
  color: var(--c-muted);
  line-height: 1.5;
}

.page-about .about-mission-cards {
  display: grid;
  gap: 1rem;
  margin-top: 2.25rem;
}

.page-about .about-mission-card {
  position: relative;
  padding: 1.5rem 1.25rem 1.25rem 1.5rem;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border-left: 3px solid var(--c-accent);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.page-about .about-mission-card-num {
  position: absolute;
  top: 0.75rem;
  right: 1rem;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.5rem;
  color: rgba(31, 79, 62, 0.14);
}

.page-about .about-mission-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  color: var(--c-primary);
  padding-right: 2rem;
}

.page-about .about-mission-card p {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--c-muted);
}

.page-about .about-mission-card a {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--c-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--c-accent);
}

.page-about .about-mission-card a:hover {
  color: var(--c-accent);
}

/* ===== 发展历程 ===== */
.page-about .about-timeline {
  color: rgba(255, 255, 255, 0.92);
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px) 0 0 / 100% 30px,
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px) 0 0 / 54px 100%,
    radial-gradient(ellipse at 12% 8%, rgba(46, 139, 87, 0.36), transparent 52%),
    linear-gradient(160deg, #163b2e 0%, #102b20 100%);
}

.page-about .about-timeline .section-title {
  color: #ffffff;
}

.page-about .about-timeline .section-tint {
  color: rgba(255, 255, 255, 0.62);
}

.page-about .about-timeline-layout {
  display: grid;
  gap: 1.75rem;
  align-items: start;
}

.page-about .about-timeline-list {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline-list::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom,
    rgba(212, 175, 55, 0.6) 0 8px,
    transparent 8px 14px
  );
}

.page-about .about-timeline-item {
  position: relative;
  padding: 0 0 1.75rem 2.75rem;
}

.page-about .about-timeline-dot {
  position: absolute;
  left: 4px;
  top: 5px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 0 4px rgba(212, 175, 55, 0.25);
  transition: transform var(--transition), box-shadow var(--transition);
}

.page-about .about-timeline-dot--current {
  background: var(--c-accent-light);
  box-shadow: 0 0 0 5px rgba(232, 200, 115, 0.3);
}

.page-about .about-timeline-year {
  display: inline-block;
  margin-bottom: 0.3rem;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  color: var(--c-accent-light);
}

.page-about .about-timeline-year--current {
  color: #ffffff;
}

.page-about .about-timeline-body {
  margin-top: 0.4rem;
}

.page-about .about-timeline-body h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  color: #ffffff;
}

.page-about .about-timeline-body p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.74);
  max-width: 34em;
}

.page-about .about-timeline-item:hover .about-timeline-dot {
  transform: scale(1.35);
  box-shadow: 0 0 0 8px rgba(212, 175, 55, 0.22);
}

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

.page-about .about-timeline-figure img {
  display: block;
  width: 100%;
  max-height: 620px;
  object-fit: cover;
  object-position: top center;
  border-radius: var(--radius);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(212, 175, 55, 0.3);
}

.page-about .about-timeline-figure .figure-caption {
  color: rgba(255, 255, 255, 0.58);
}

.page-about .about-timeline-cta {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
  margin-top: 2.25rem;
  padding: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.07);
}

.page-about .about-timeline-cta p {
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.6;
}

/* ===== 资质认证 ===== */
.page-about .about-cert {
  background: var(--c-bg);
}

.page-about .about-cert-row {
  display: grid;
  gap: 1.25rem;
  max-width: 60rem;
  margin-inline: auto;
}

.page-about .about-cert-item {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  padding: 1.75rem 1.5rem;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.page-about .about-cert-item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.page-about .about-cert-stamp {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 96px;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  border: 3px solid var(--c-accent);
  color: var(--c-accent);
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 1rem;
  line-height: 1.3;
  text-align: center;
  box-shadow: inset 0 0 0 5px rgba(212, 175, 55, 0.14), 0 0 0 5px rgba(212, 175, 55, 0.1);
  transition: transform var(--transition), box-shadow var(--transition);
}

.page-about .about-cert-item:hover .about-cert-stamp {
  transform: rotate(-7deg) scale(1.05);
  box-shadow: inset 0 0 0 5px rgba(212, 175, 55, 0.18), 0 0 0 9px rgba(212, 175, 55, 0.16);
}

.page-about .about-cert-stamp--gold {
  border-color: var(--c-alert);
  color: var(--c-alert);
  box-shadow: inset 0 0 0 5px rgba(139, 34, 82, 0.08), 0 0 0 5px rgba(139, 34, 82, 0.08);
}

.page-about .about-cert-item:hover .about-cert-stamp--gold {
  transform: rotate(7deg) scale(1.05);
  box-shadow: inset 0 0 0 5px rgba(139, 34, 82, 0.14), 0 0 0 9px rgba(139, 34, 82, 0.1);
}

.page-about .about-cert-body h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  color: var(--c-primary);
}

.page-about .about-cert-body p {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-about .about-cert-body a {
  font-family: var(--font-head);
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--c-primary);
  text-decoration: none;
  border-bottom: 1px solid var(--c-accent);
}

.page-about .about-cert-body a:hover {
  color: var(--c-accent);
}

.page-about .about-cert-note {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  max-width: 60rem;
  margin: 1.75rem auto 0;
  padding: 1rem 1.25rem;
  background: rgba(139, 34, 82, 0.06);
  border-left: 3px solid var(--c-alert);
  border-radius: var(--radius);
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--c-muted);
}

/* ===== 团队与文化 ===== */
.page-about .about-team {
  color: rgba(255, 255, 255, 0.94);
  background:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px) 0 0 / 100% 28px,
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px) 0 0 / 52px 100%,
    linear-gradient(145deg, #173f31 0%, #102b20 100%);
}

.page-about .about-team .section-title {
  color: #ffffff;
}

.page-about .about-team .section-tint {
  color: rgba(255, 255, 255, 0.62);
}

.page-about .about-team-grid {
  display: grid;
  gap: 1.75rem;
  align-items: center;
}

.page-about .about-team-cards {
  display: grid;
  gap: 1rem;
}

.page-about .about-team-card {
  padding: 1.4rem 1.4rem 1.25rem;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  transition: transform var(--transition), background var(--transition);
}

.page-about .about-team-card:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-4px);
}

.page-about .about-team-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  color: var(--c-accent-light);
}

.page-about .about-team-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.76);
}

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

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.page-about .about-team-figure .figure-caption {
  color: rgba(255, 255, 255, 0.56);
}

/* ===== 合作与生态 ===== */
.page-about .about-partners-grid {
  display: grid;
  gap: 1.25rem;
}

.page-about .about-partner-item {
  padding: 1.5rem 1.25rem;
  background: var(--c-surface);
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}

.page-about .about-partner-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.page-about .about-partner-item h3 {
  margin: 0 0 0.55rem;
  font-size: 1.05rem;
  color: var(--c-primary);
}

.page-about .about-partner-item p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-about .about-partners-cta {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  margin-top: 2.25rem;
  padding: 1.5rem;
  background: rgba(31, 79, 62, 0.06);
  border-radius: var(--radius);
  text-align: center;
}

.page-about .about-partners-cta p {
  margin: 0;
  font-size: 1rem;
  color: var(--c-primary);
}

/* ===== 响应式布局 ===== */
@media (min-width: 640px) {
  .page-about .about-mission-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-team-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-partners-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-timeline-cta,
  .page-about .about-partners-cta {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    text-align: left;
  }
}

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

@media (min-width: 960px) {
  .page-about .about-mission-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 2.5rem;
  }

  .page-about .about-timeline-layout {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 0.85fr);
    gap: 2.75rem;
  }

  .page-about .about-timeline-figure {
    position: sticky;
    top: 100px;
    align-self: start;
  }

  .page-about .about-timeline-list::before {
    left: 50%;
    transform: translateX(-50%);
  }

  .page-about .about-timeline-item {
    width: 50%;
    padding: 0 0 2.5rem 0;
  }

  .page-about .about-timeline-item:nth-child(odd) {
    margin-right: auto;
    padding-right: 2.25rem;
    text-align: right;
  }

  .page-about .about-timeline-item:nth-child(even) {
    margin-left: auto;
    padding-left: 2.25rem;
    text-align: left;
  }

  .page-about .about-timeline-dot {
    left: auto;
    right: -8px;
  }

  .page-about .about-timeline-item:nth-child(even) .about-timeline-dot {
    right: auto;
    left: -8px;
  }

  .page-about .about-timeline-body p {
    margin-inline: 0;
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 2.5rem;
  }

  .page-about .about-partners-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-mission-card,
  .page-about .about-partner-item,
  .page-about .about-team-card,
  .page-about .about-timeline-item:hover .about-timeline-dot,
  .page-about .about-cert-item:hover .about-cert-stamp {
    transform: none;
    transition: none;
  }
}