.page-about {
  --about-hero-bg: linear-gradient(135deg, var(--clr-dark) 0%, #0f1a26 100%);
  --about-card-gap: var(--space-lg);
  --about-icon-size: 2.4rem;
  --about-map-radius: var(--radius-md);
  --about-logo-size: 80px;
  --about-section-code-size: 0.7rem;
  color: var(--clr-text);
  font-family: var(--font-primary);
  background-color: var(--clr-light);
}

/* ── 首屏 ── */
.page-about__hero {
  background: var(--about-hero-bg);
  padding: var(--space-2xl) 0 var(--space-xl);
  position: relative;
  overflow: hidden;
}

.page-about__hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 80% 20%, rgba(255,107,53,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.page-about__hero-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.page-about__hero-text {
  flex: 1 1 100%;
  max-width: 580px;
}

.page-about__hero-kicker {
  color: var(--clr-primary-light);
  margin-bottom: var(--space-sm);
  display: inline-block;
}

.page-about__hero-title {
  font-weight: 800;
  font-size: 2.6rem;
  letter-spacing: -0.02em;
  color: var(--clr-white);
  line-height: 1.15;
  margin: 0 0 var(--space-md);
}

.page-about__hero-desc {
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.8);
  margin: 0 0 var(--space-lg);
}

.page-about__hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.page-about__hero-visual {
  flex: 0 0 auto;
  max-width: 100%;
}

.page-about__hero-img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  object-fit: cover;
  aspect-ratio: 3 / 2;
  background: var(--clr-dark-gray);
}

/* ── 面包屑 ── */
.page-about .breadcrumb {
  padding-top: var(--space-md);
  padding-bottom: var(--space-md);
  font-size: 0.85rem;
}

.page-about .breadcrumb a {
  color: var(--clr-primary);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  text-decoration: underline;
}

.page-about .breadcrumb__sep {
  margin: 0 var(--space-xs);
  color: var(--clr-gray);
}

/* ── 通用章节 ── */
.page-about__section-code {
  display: inline-block;
  font-size: var(--about-section-code-size);
  letter-spacing: 0.08em;
  color: var(--clr-primary);
  margin-bottom: var(--space-sm);
  font-weight: 600;
}

.page-about__section-code--light {
  color: var(--clr-primary-light);
}

.page-about__section-title {
  font-weight: 700;
  font-size: 1.8rem;
  letter-spacing: -0.01em;
  color: var(--clr-text);
  margin: 0 0 var(--space-md);
  line-height: 1.2;
}

.page-about__section-title--light {
  color: var(--clr-white);
}

.page-about__section-body {
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--clr-dark-gray);
  margin: 0 0 var(--space-md);
}

.page-about__section-body--light {
  color: rgba(255,255,255,0.85);
}

/* ── 品牌档案区块 ── */
.page-about__profile {
  padding: var(--space-2xl) 0;
}

.page-about__profile-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.page-about__profile-content {
  padding: var(--space-lg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(6px);
}

.page-about__profile-stat {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-lg);
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--clr-gray);
}

.page-about__profile-stat .data-item {
  flex: 1 1 120px;
}

.page-about__profile-stat .data-label {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--clr-dark-gray);
  margin-bottom: var(--space-xs);
}

.page-about__profile-stat .data-value {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  color: var(--clr-dark);
}

.page-about__profile-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.page-about__map-img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--about-map-radius);
  box-shadow: var(--shadow-sm);
  object-fit: cover;
  aspect-ratio: 3 / 2;
  background: var(--clr-light);
  transition: transform var(--transition);
}

.page-about__map-img:hover {
  transform: scale(1.03);
}

.page-about__map-caption {
  color: var(--clr-dark-gray);
  letter-spacing: 0.06em;
}

/* ── 服务理念区块（深色） ── */
.page-about__service {
  background: var(--clr-dark);
  padding: var(--space-2xl) 0;
  position: relative;
}

.page-about__service::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
}

.page-about__service-inner {
  text-align: center;
}

.page-about__service-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin: var(--space-lg) 0;
}

.page-about__service-card {
  padding: var(--space-lg);
  text-align: left;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-md);
  transition: background var(--transition), transform var(--transition);
}

.page-about__service-card:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}

.page-about__service-icon {
  display: inline-block;
  font-size: var(--about-icon-size);
  color: var(--clr-primary);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.page-about__service-card-title {
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--clr-white);
  margin: 0 0 var(--space-xs);
}

.page-about__service-card-desc {
  font-weight: 400;
  font-size: 0.9rem;
  line-height: 1.6;
  color: rgba(255,255,255,0.7);
  margin: 0;
}

.page-about__service-cta {
  margin-top: var(--space-lg);
}

/* ── 联系与支持 ── */
.page-about__contact {
  padding: var(--space-2xl) 0;
}

.page-about__contact-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.page-about__contact-info {
  padding: var(--space-lg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(6px);
}

.page-about__contact-list {
  list-style: none;
  padding: 0;
  margin: var(--space-md) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.page-about__contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.page-about__contact-icon {
  flex: 0 0 32px;
  font-size: 1.3rem;
  line-height: 1.4;
  color: var(--clr-primary);
}

.page-about__contact-link {
  color: var(--clr-primary);
  text-decoration: none;
  font-weight: 500;
  word-break: break-all;
}

.page-about__contact-link:hover {
  text-decoration: underline;
}

.page-about__contact-text {
  font-weight: 500;
  color: var(--clr-text);
}

.page-about__contact-note {
  color: var(--clr-dark-gray);
  margin-top: var(--space-sm);
  opacity: 0.7;
}

.page-about__contact-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.page-about__logo-deco {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
  object-fit: cover;
  aspect-ratio: 1 / 1;
  background: var(--clr-light);
  transition: transform var(--transition);
}

.page-about__logo-deco:hover {
  transform: rotate(8deg) scale(1.05);
}

/* ── 信任声明 ── */
.page-about__trust {
  padding: var(--space-xl) 0;
  background: var(--clr-light);
  border-top: 1px solid var(--clr-gray);
}

.page-about__trust-text {
  font-weight: 400;
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--clr-dark-gray);
  max-width: 600px;
  margin: 0 auto var(--space-lg);
}

.page-about__trust-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
}

/* ── 桌面端（≥768px） ── */
@media (min-width: 768px) {
  .page-about__hero-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .page-about__hero-text {
    flex: 1 1 55%;
  }

  .page-about__hero-title {
    font-size: 3.2rem;
  }

  .page-about__hero-visual {
    flex: 0 0 45%;
    max-width: 480px;
  }

  .page-about__profile-grid {
    flex-direction: row;
    align-items: flex-start;
  }

  .page-about__profile-content {
    flex: 2;
  }

  .page-about__profile-visual {
    flex: 1;
    align-items: flex-start;
  }

  .page-about__service-grid {
    flex-direction: row;
    gap: var(--space-lg);
  }

  .page-about__service-card {
    flex: 1;
  }

  .page-about__contact-grid {
    flex-direction: row;
    align-items: flex-start;
  }

  .page-about__contact-info {
    flex: 2;
  }

  .page-about__contact-visual {
    flex: 1;
  }
}

/* ── 大桌面（≥1024px） ── */
@media (min-width: 1024px) {
  .page-about__hero-title {
    font-size: 3.8rem;
  }

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