.page-about {
  --page-hero-gap: 2rem;
  --hero-left-width: 45%;
  --advantage-card-bg: var(--bg-dark);
  --advantage-card-text: var(--text-on-dark);
  --advantage-number-color: var(--data-highlight);
  --region-bg: var(--bg-light);
  --region-accent: var(--accent);
}

/* 页面专属重置与基础 */
.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

/* 面包屑 */
.page-about .breadcrumb {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 1rem var(--space-unit);
  font-size: 0.85rem;
  color: var(--text-primary);
}
.page-about .breadcrumb ol {
  list-style: none;
  display: flex;
  gap: 0.5rem;
}
.page-about .breadcrumb a {
  color: var(--primary);
  text-decoration: none;
}
.page-about .breadcrumb a:hover {
  color: var(--accent);
}
.page-about .breadcrumb [aria-current="page"] {
  font-weight: 600;
  color: var(--text-primary);
}

/* Hero section */
.page-about .hero-section {
  position: relative;
  overflow: hidden;
  background: var(--bg-dark);
  color: var(--text-on-dark);
  min-height: 70vh;
  display: flex;
  align-items: stretch;
}
.page-about .hero-bg-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.08;
  pointer-events: none;
  z-index: 0;
}
.page-about .hero-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 4rem var(--space-unit);
  display: flex;
  flex-wrap: wrap;
  gap: var(--page-hero-gap);
  align-items: flex-start;
}
/* 斜线分割背景（利用 diagonal-bg 全局样式） */
.page-about .diagonal-bg {
  background: linear-gradient(135deg, transparent 45%, rgba(0,191,165,0.08) 45%, rgba(0,191,165,0.08) 55%, transparent 55%);
}
.page-about .hero-left {
  flex: 0 0 var(--hero-left-width);
  min-width: 280px;
}
.page-about .hero-right {
  flex: 1;
  min-width: 300px;
}
.page-about .page-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(2.2rem, 5vw, 4rem);
  letter-spacing: 0.05em;
  margin: 0 0 0.25em;
  line-height: 1.1;
}
.page-about .brand-tagline {
  font-family: var(--font-heading);
  font-weight: 300;
  font-size: 1.2rem;
  letter-spacing: 0.15em;
  color: var(--primary);
  margin-bottom: 1.5rem;
}
.page-about .brand-story h2 {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  margin: 0 0 0.75rem;
}
.page-about .brand-story p {
  font-family: var(--font-body);
  line-height: 1.7;
  margin-bottom: 1.2rem;
}
/* 核心优势网格 */
.page-about .section-subtitle {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  margin: 0 0 1rem;
  color: var(--accent);
}
.page-about .advantage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}
.page-about .advantage-card {
  background: var(--advantage-card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: var(--shadow-sm);
  cursor: default;
  position: relative;
}
.page-about .advantage-card:hover,
.page-about .advantage-card:focus-within {
  transform: scale(1.03);
  box-shadow: 0 8px 24px rgba(0,191,165,0.2);
}
.page-about .advantage-card .card-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
  color: var(--text-on-dark);
}
.page-about .advantage-card .data-number {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 2.8rem;
  color: var(--advantage-number-color);
  line-height: 1.2;
  margin: 0.2rem 0;
}
.page-about .advantage-card .card-meta {
  font-size: 0.8rem;
  color: var(--primary);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}
.page-about .advantage-card .card-desc {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.8);
  line-height: 1.5;
}
.page-about .advantage-bg-icon {
  display: block;
  width: 60px;
  height: auto;
  margin: 1rem auto 0;
  opacity: 0.6;
  max-width: 100%;
}

/* 地域特色 */
.page-about .region-section {
  background: var(--region-bg);
  padding: 4rem var(--space-unit);
}
.page-about .region-content {
  max-width: var(--container-max);
  margin: 0 auto;
}
.page-about .region-section h2 {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--bg-dark);
  margin-bottom: 0.5rem;
}
.page-about .region-intro {
  font-family: var(--font-heading);
  font-weight: 300;
  font-size: 1.1rem;
  color: var(--primary);
  margin-bottom: 2rem;
}
.page-about .region-body {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: center;
}
.page-about .region-text {
  flex: 1;
  min-width: 280px;
}
.page-about .region-text p {
  font-family: var(--font-body);
  line-height: 1.7;
  color: var(--text-primary);
  margin-bottom: 1rem;
}
.page-about .region-visual {
  flex: 0 0 45%;
  min-width: 280px;
  position: relative;
}
.page-about .region-img {
  width: 100%;
  height: auto;
  max-width: 100%;
  display: block;
  border-radius: var(--radius-sm);
  object-fit: cover;
  aspect-ratio: 3/2;
}

/* 信任声明 */
.page-about .trust-statement {
  max-width: var(--container-max);
  margin: 3rem auto;
  padding: 1.5rem var(--space-unit);
  text-align: center;
  font-family: var(--font-heading);
  font-weight: 300;
  font-size: 1rem;
  color: var(--text-primary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* 按钮 */
.page-about .btn {
  display: inline-block;
  padding: 0.6rem 1.8rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-weight: 600;
  transition: background 0.2s, transform 0.2s;
  font-family: var(--font-heading);
}
.page-about .btn-primary {
  background: var(--primary);
  color: var(--text-on-dark);
}
.page-about .btn-primary:hover {
  background: #00a089;
  transform: translateY(-2px);
}
.page-about .btn-accent {
  background: var(--accent);
  color: #fff;
}
.page-about .btn-accent:hover {
  background: #e65c00;
  transform: translateY(-2px);
}

/* 滚动显现动画 */
.page-about [data-scroll] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.page-about [data-scroll].revealed {
  opacity: 1;
  transform: translateY(0);
}
.page-about [data-scroll-delay="200"].revealed {
  transition-delay: 0.2s;
}

/* 响应式：移动端优先 */
@media (max-width: 767px) {
  .page-about .hero-inner {
    flex-direction: column;
    padding: 2rem var(--space-unit);
  }
  .page-about .hero-left {
    flex: 0 0 100%;
    min-width: 0;
  }
  .page-about .hero-right {
    min-width: 0;
  }
  .page-about .advantage-grid {
    grid-template-columns: 1fr;
  }
  .page-about .region-body {
    flex-direction: column-reverse;
  }
  .page-about .region-visual {
    flex: 0 0 100%;
  }
  .page-about .region-section {
    padding: 2rem var(--space-unit);
  }
  .page-about .trust-statement {
    margin: 2rem auto;
    padding: 1rem var(--space-unit);
  }
}

/* 桌面微调 */
@media (min-width: 768px) {
  .page-about .hero-left {
    padding-right: 1rem;
  }
  .page-about .hero-right {
    padding-left: 1rem;
    border-left: 1px solid rgba(255,255,255,0.1);
  }
}