.page-about {
  --panel-padding: 2.4rem 1.6rem;
  --split-gap: 2rem;
  --card-radius: 1.2rem;
  color: var(--text-dark);
  font-family: var(--font-body);
  line-height: 1.6;
}

/* 面包屑 */
.page-about .breadcrumb {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.2rem 1.6rem 0;
  font-size: 0.85rem;
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}
.page-about .breadcrumb a {
  color: var(--primary-orange);
  text-decoration: none;
  font-weight: 500;
  transition: opacity 0.2s;
}
.page-about .breadcrumb a:hover { opacity: 0.75; }
.page-about .breadcrumb .sep {
  color: var(--primary-blue);
  opacity: 0.5;
  margin: 0 0.2rem;
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--text-dark);
  font-weight: 600;
}

/* 面板画板 */
.page-about .panel {
  padding: var(--panel-padding);
  margin: 0;
}
.page-about .panel-dark {
  background: linear-gradient(145deg, var(--primary-blue) 0%, #002a52 100%);
  color: var(--text-light);
}
.page-about .panel-light {
  background: var(--bg-light);
  color: var(--text-dark);
}
.page-about .panel-dark-alt {
  background: linear-gradient(145deg, var(--bg-dark) 0%, #0f0f24 100%);
  color: var(--text-light);
}

.page-about .panel-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--split-gap);
}

/* 分栏布局 */
.page-about .split-layout {
  display: flex;
  flex-direction: column;
  gap: var(--split-gap);
}
.page-about .split-reverse {
  flex-direction: column;
}

.page-about .split-text {
  flex: 1 1 50%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.page-about .split-visual {
  flex: 1 1 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.page-about .split-visual img {
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--card-radius);
  object-fit: cover;
  box-shadow: 0 0.8rem 2.4rem rgba(0,0,0,0.18);
  display: block;
}

/* 标题与文字 */
.page-about h1 {
  font-family: var(--font-head);
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 0.8rem;
  color: var(--text-light);
  letter-spacing: -0.02em;
}

.page-about h2 {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 0.6rem;
  letter-spacing: -0.01em;
}

.page-about .panel-light h2 {
  color: var(--primary-blue);
}
.page-about .panel-dark-alt h2 {
  color: var(--text-light);
}

.page-about .lead {
  font-size: 1.05rem;
  margin: 0 0 1.4rem;
  opacity: 0.92;
  max-width: 52ch;
}
.page-about .section-desc {
  font-size: 0.95rem;
  margin: 0 0 1.6rem;
  opacity: 0.8;
  max-width: 48ch;
}

/* 按钮 */
.page-about .btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 1.6rem;
  border: 2px solid var(--primary-orange);
  color: var(--primary-orange);
  background: transparent;
  border-radius: 2.4rem;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: all 0.25s ease;
  width: fit-content;
}
.page-about .btn-outline:hover {
  background: var(--primary-orange);
  color: var(--text-light);
}
.page-about .panel-dark .btn-outline {
  border-color: var(--primary-orange);
  color: var(--primary-orange);
}
.page-about .panel-dark .btn-outline:hover {
  background: var(--primary-orange);
  color: var(--text-light);
}

.page-about .btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 2rem;
  background: var(--primary-orange);
  color: var(--text-light);
  border: none;
  border-radius: 2.4rem;
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  transition: background 0.25s ease, transform 0.2s;
  width: fit-content;
}
.page-about .btn-primary:hover {
  background: #e85a2a;
  transform: translateY(-2px);
}

/* 数据卡片 */
.page-about .data-cards {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 0.4rem;
}
.page-about .data-card {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  padding: 1rem 1.4rem;
  border-radius: var(--card-radius);
  background: var(--card-glass);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid rgba(0,0,0,0.06);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  cursor: default;
}
.page-about .panel-light .data-card {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(0,0,0,0.06);
}
.page-about .data-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 0.6rem 1.6rem rgba(0,0,0,0.10);
}
.page-about .data-number {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--primary-orange);
  min-width: 6ch;
  transition: color 0.25s ease;
  line-height: 1;
}
.page-about .data-card:hover .data-number {
  color: var(--accent-green);
}
.page-about .data-label {
  font-size: 0.9rem;
  font-weight: 500;
  opacity: 0.85;
}

/* 未来方向链接组 */
.page-about .future-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.2rem;
}

/* 图片额外修饰 */
.page-about .hero-img {
  border-radius: var(--card-radius);
}

/* ========== 桌面端 ≥768px ========== */
@media (min-width: 768px) {
  .page-about {
    --panel-padding: 3.6rem 2.4rem;
    --split-gap: 3rem;
  }

  .page-about .breadcrumb {
    padding: 1.6rem 2.4rem 0;
    font-size: 0.9rem;
  }

  .page-about .split-layout {
    flex-direction: row;
    align-items: center;
  }
  .page-about .split-reverse {
    flex-direction: row-reverse;
  }

  .page-about h1 {
    font-size: 3.2rem;
  }
  .page-about h2 {
    font-size: 2.4rem;
  }
  .page-about .lead {
    font-size: 1.1rem;
  }
  .page-about .section-desc {
    font-size: 1rem;
  }

  .page-about .split-visual img {
    max-width: 100%;
    height: auto;
  }

  .page-about .data-cards {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 1.2rem;
  }
  .page-about .data-card {
    flex: 1 1 14rem;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
    padding: 1.2rem 1.6rem;
  }
  .page-about .data-number {
    font-size: 1.8rem;
    min-width: auto;
  }
  .page-about .data-label {
    font-size: 0.85rem;
  }
}

/* ========== 大桌面 ≥1024px ========== */
@media (min-width: 1024px) {
  .page-about {
    --panel-padding: 5rem 2.4rem;
    --split-gap: 4rem;
  }

  .page-about h1 {
    font-size: 3.8rem;
  }
  .page-about h2 {
    font-size: 2.8rem;
  }
  .page-about .lead {
    font-size: 1.2rem;
    max-width: 56ch;
  }

  .page-about .data-card {
    flex: 1 1 12rem;
    padding: 1.6rem 2rem;
  }
  .page-about .data-number {
    font-size: 2.2rem;
  }
}