.page-about {
  --page-accent: var(--color-accent, #D32F2F);
  --page-gold: var(--color-gold, #FFD700);
  --page-glass: var(--color-glass, rgba(255,255,255,0.08));
  --page-card-bg: var(--color-card-bg, #1E1E3A);
  --page-white: var(--color-white, #FFFFFF);
  --page-secondary: var(--color-secondary-text, #A0A0B0);
  --page-green: var(--color-data-green, #4CAF50);
  --page-bg-deep: var(--color-bg-deep, #0D0D1A);
  --page-primary: var(--color-primary, #0B1D3A);
  --page-heading: var(--font-heading, 'Inter','PingFang SC',sans-serif);
  --page-body: var(--font-body, 'Noto Sans SC',sans-serif);
  --page-data: var(--font-data, 'Fira Code',monospace);
  --page-max-width: var(--max-width, 1360px);
  --page-radius: var(--border-radius, 6px);
  --page-spacing-lg: var(--spacing-lg, 2rem);
  --page-spacing-md: var(--spacing-md, 1rem);
  --page-spacing-xl: var(--spacing-xl, 4rem);
}

/* 首屏品牌声明区 */
.page-about .hero-statement {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--page-primary) 0%, var(--page-bg-deep) 80%);
  padding: var(--page-spacing-xl) 1.25rem;
  margin: 0;
  overflow: hidden;
}
.page-about .hero-statement::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60%;
  height: 80%;
  background: radial-gradient(circle, rgba(211,47,47,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.page-about .hero-statement .breadcrumb {
  margin-bottom: 2rem;
  font-family: var(--page-body);
  font-size: 0.85rem;
  color: var(--page-secondary);
}
.page-about .hero-statement .breadcrumb a {
  color: var(--page-gold);
  text-decoration: none;
  transition: color 0.2s;
}
.page-about .hero-statement .breadcrumb a:hover {
  color: var(--page-accent);
}
.page-about .hero-statement .breadcrumb .separator {
  margin: 0 0.4em;
  color: var(--page-secondary);
}
.page-about .hero-statement .breadcrumb .current {
  color: var(--page-white);
}
.page-about .statement-layout {
  position: relative;
  z-index: 1;
  max-width: 720px;
}
.page-about .statement-headline {
  font-family: var(--page-heading);
  font-weight: 800;
  font-size: clamp(2rem, 6vw, 3.8rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--page-white);
  margin: 0 0 0.5rem;
}
.page-about .statement-sub {
  font-family: var(--page-body);
  font-size: clamp(1rem, 2.5vw, 1.6rem);
  font-weight: 300;
  color: var(--page-gold);
  margin: 0 0 2rem;
  letter-spacing: 0.08em;
}
.page-about .statement-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}
.page-about .meta-badge {
  display: inline-block;
  padding: 0.35rem 1rem;
  border-radius: 999px;
  font-family: var(--page-data);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  border: 1px solid transparent;
}
.page-about .meta-badge.gold {
  background: rgba(255,215,0,0.15);
  color: var(--page-gold);
  border-color: rgba(255,215,0,0.3);
}
.page-about .meta-badge.accent {
  background: rgba(211,47,47,0.15);
  color: var(--page-accent);
  border-color: rgba(211,47,47,0.3);
}
.page-about .meta-badge.glass {
  background: var(--page-glass);
  color: var(--page-white);
  border-color: var(--page-glass);
}
.page-about .scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--page-body);
  font-size: 0.75rem;
  color: var(--page-secondary);
  letter-spacing: 0.15em;
  animation: pulse-down 2s ease-in-out infinite;
}
@keyframes pulse-down {
  0%, 100% { opacity: 0.5; transform: translateX(-50%) translateY(0); }
  50% { opacity: 1; transform: translateX(-50%) translateY(6px); }
}

/* 通用主题带 & 内容容器 */
.page-about .theme-band {
  padding: var(--page-spacing-xl) 1.25rem;
}
.page-about .theme-band:not(.hero-statement) {
  background: var(--page-bg-deep);
}
.page-about .theme-band:nth-child(even):not(.hero-statement) {
  background: var(--page-primary);
}
.page-about .content-container {
  max-width: var(--page-max-width);
  margin: 0 auto;
}
.page-about .section-label {
  font-family: var(--page-data);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
  display: inline-block;
  transform: rotate(0deg);
}
.page-about .section-label.accent {
  color: var(--page-accent);
}
.page-about .section-label.gold {
  color: var(--page-gold);
}
.page-about .section-title {
  font-family: var(--page-heading);
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--page-white);
  margin: 0 0 1.2rem;
}
.page-about .section-desc {
  font-family: var(--page-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--page-secondary);
  margin: 0 0 1rem;
  max-width: 65ch;
}
.page-about .sub-heading {
  font-family: var(--page-heading);
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  font-weight: 600;
  color: var(--page-gold);
  margin: 0 0 1rem;
}

/* 横向主题带：左右布局 */
.page-about .band-layout {
  display: flex;
  flex-direction: column;
  gap: var(--page-spacing-lg);
}
.page-about .band-reverse {
  flex-direction: column-reverse;
}
.page-about .band-content {
  flex: 1;
}
.page-about .band-visual {
  flex: 1;
  min-width: 0;
}
.page-about .img-container {
  border-radius: var(--page-radius);
  overflow: hidden;
}
.page-about .img-container.glass-panel {
  background: var(--page-glass);
  padding: 0.5rem;
}
.page-about .img-container img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: calc(var(--page-radius) - 2px);
}
.page-about .fit-cover {
  object-fit: cover;
  aspect-ratio: attr(width) / attr(height);
}

/* 品牌使命区 */
.page-about .mission-band .milestone-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem 2.5rem;
  margin-top: 1.5rem;
}
.page-about .milestone-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.page-about .milestone-num {
  font-family: var(--page-heading);
  font-size: 1.3rem;
  font-weight: 700;
}
.page-about .milestone-num.gold {
  color: var(--page-gold);
}
.page-about .milestone-label {
  font-family: var(--page-body);
  font-size: 0.85rem;
  color: var(--page-secondary);
}

/* 理念深化 */
.page-about .deepen-band .deepen-content {
  max-width: 780px;
  margin: 0 auto;
  text-align: left;
}
.page-about .deepen-content p {
  font-family: var(--page-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--page-secondary);
  margin: 0 0 1.2rem;
}
.page-about .deepen-content .sub-heading {
  margin-bottom: 1.2rem;
}

/* 服务特色卡片网格 */
.page-about .feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}
.page-about .feature-card {
  padding: 1.25rem;
  border-radius: var(--page-radius);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.page-about .feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.3);
}
.page-about .feature-icon {
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 0.5rem;
}
.page-about .feature-icon.gold { color: var(--page-gold); }
.page-about .feature-icon.accent { color: var(--page-accent); }
.page-about .feature-icon.green { color: var(--page-green); }
.page-about .feature-title {
  font-family: var(--page-heading);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--page-white);
  margin: 0 0 0.4rem;
}
.page-about .feature-desc {
  font-family: var(--page-body);
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--page-secondary);
  margin: 0;
}

/* 信任数据 */
.page-about .trust-band .trust-message {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}
.page-about .trust-stats {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  margin-top: 2rem;
}
.page-about .trust-message .stat-block {
  text-align: center;
}
.page-about .trust-message .stat-value {
  font-family: var(--page-data);
  font-size: 1.4rem;
  font-weight: 700;
  display: block;
}
.page-about .trust-message .stat-value.gold { color: var(--page-gold); }
.page-about .trust-message .stat-value.accent { color: var(--page-accent); }
.page-about .trust-message .stat-label {
  font-family: var(--page-body);
  font-size: 0.85rem;
  color: var(--page-secondary);
  display: block;
  margin-top: 0.2rem;
}

/* 联系区 */
.page-about .contact-band .contact-list {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0;
}
.page-about .contact-item {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--page-glass);
}
.page-about .contact-item:last-child {
  border-bottom: none;
}
.page-about .contact-label {
  font-family: var(--page-data);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--page-gold);
  min-width: 5em;
}
.page-about .contact-link {
  font-family: var(--page-body);
  font-size: 0.95rem;
  color: var(--page-white);
  text-decoration: none;
  transition: color 0.2s;
}
.page-about .contact-link:hover {
  color: var(--page-accent);
}
.page-about .contact-addr {
  font-family: var(--page-body);
  font-size: 0.95rem;
  color: var(--page-secondary);
}
.page-about .contact-cta {
  margin-top: 1.5rem;
}
.page-about .btn.btn-primary {
  display: inline-block;
  padding: 0.7rem 2rem;
  background: var(--page-accent);
  color: var(--page-white);
  font-family: var(--page-heading);
  font-weight: 600;
  border-radius: var(--page-radius);
  text-decoration: none;
  transition: background 0.2s, transform 0.2s;
}
.page-about .btn.btn-primary:hover {
  background: #b71c1c;
  transform: scale(1.03);
}

/* 返回顶部 */
.page-about .back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 1.5rem;
  z-index: 100;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--page-accent);
  color: var(--page-white);
  border: none;
  font-size: 1.3rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.page-about .back-to-top[data-visible] {
  opacity: 1;
  visibility: visible;
}

/* 桌面端布局 */
@media (min-width: 768px) {
  .page-about .band-layout {
    flex-direction: row;
    align-items: center;
    gap: var(--page-spacing-xl);
  }
  .page-about .band-reverse {
    flex-direction: row-reverse;
  }
  .page-about .band-content {
    flex: 1 1 50%;
  }
  .page-about .band-visual {
    flex: 1 1 50%;
  }
  .page-about .feature-grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .hero-statement {
    min-height: 80vh;
  }
  .page-about .contact-item {
    flex-wrap: nowrap;
  }
}
@media (min-width: 1024px) {
  .page-about .feature-grid {
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }
  .page-about .hero-statement {
    padding: var(--page-spacing-xl) 2rem;
  }
}
/* 防止窄屏溢出 */
.page-about * {
  box-sizing: border-box;
}
.page-about img {
  max-width: 100%;
  height: auto;
}