.page-about {
  --page-secondary: #FF6B35;
  --page-primary: #0B1A30;
  --page-white: #FFFFFF;
  --page-gray-light: #F5F5F5;
  --page-gray-medium: #CCCCCC;
  --page-dark-gray: #4A4A4A;
  --page-gradient: linear-gradient(135deg, #0B1A30 0%, #1A2D4A 100%);
  --page-chamfer-size: 8px;
  display: block;
  width: 100%;
}

/* 首屏 hero */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--page-gradient);
  min-height: 40vh;
  display: flex;
  align-items: flex-end;
}

.page-about .hero-visual {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.25;
}

.page-about .hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  max-width: 100%;
}

.page-about .hero-text {
  position: relative;
  z-index: 1;
  padding: 2rem 1rem 3rem;
  width: 100%;
}

.page-about .breadcrumb {
  font-family: var(--heading-font);
  font-size: 0.875rem;
  color: var(--page-gray-medium);
  margin-bottom: 1.5rem;
}

.page-about .breadcrumb a {
  color: var(--page-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--page-white);
  text-decoration: underline;
}

.page-about .breadcrumb .sep {
  margin: 0 0.5rem;
  color: var(--page-gray-medium);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--page-white);
  text-decoration: none;
}

.page-about .hero-title {
  font-family: var(--heading-font);
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--page-white);
  margin: 0 0 0.5rem;
  line-height: 1.1;
}

.page-about .hero-subtitle {
  font-family: var(--body-font);
  font-size: 1.125rem;
  color: var(--page-gray-medium);
  margin: 0;
  max-width: 36rem;
}

/* 章节标签 */
.page-about .section-label {
  font-family: var(--heading-font);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--page-primary);
  margin: 0 0 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.page-about .label-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: var(--page-secondary);
  color: var(--page-white);
  font-family: var(--number-font);
  font-size: 1.125rem;
  font-weight: 500;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  flex-shrink: 0;
}

/* 时间线 */
.page-about .about-milestone {
  padding: 3rem 0;
  background-color: var(--page-gray-light);
}

.page-about .timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
  padding-left: 2rem;
}

@media (min-width: 768px) {
  .page-about .timeline {
    flex-direction: row;
    gap: 1.5rem;
    padding-left: 0;
    padding-top: 0;
  }
}

.page-about .timeline-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  position: relative;
}

@media (min-width: 768px) {
  .page-about .timeline-item {
    flex-direction: column;
    align-items: center;
    flex: 1;
  }
}

.page-about .timeline-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  width: 1.5rem;
}

@media (min-width: 768px) {
  .page-about .timeline-marker {
    flex-direction: row;
    width: 100%;
    height: 1.5rem;
  }
}

.page-about .marker-dot {
  width: 16px;
  height: 16px;
  background: var(--page-secondary);
  border-radius: 50%;
  border: 3px solid var(--page-primary);
  flex-shrink: 0;
  transition: transform 0.2s, box-shadow 0.2s;
}

.page-about .timeline-item:hover .marker-dot,
.page-about .timeline-item:focus-within .marker-dot {
  transform: scale(1.3);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.3);
}

.page-about .marker-line {
  width: 2px;
  flex: 1;
  background: linear-gradient(to bottom, var(--page-secondary), var(--page-primary));
  min-height: 2rem;
}

@media (min-width: 768px) {
  .page-about .marker-line {
    width: 100%;
    height: 2px;
    min-height: 0;
    background: linear-gradient(to right, var(--page-secondary), var(--page-primary));
  }
}

.page-about .timeline-content {
  flex: 1;
  padding: 1rem 1.25rem;
  background: var(--page-white);
  border-left: 4px solid var(--page-secondary);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: transform 0.2s, box-shadow 0.2s;
}

.page-about .timeline-content:hover,
.page-about .timeline-content:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(11, 26, 48, 0.12);
}

@media (min-width: 768px) {
  .page-about .timeline-content {
    border-left: none;
    border-top: 4px solid var(--page-secondary);
    text-align: center;
  }
}

.page-about .timeline-year {
  display: inline-block;
  font-family: var(--number-font);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--page-primary);
  background: var(--page-gray-light);
  padding: 0.125rem 0.75rem;
  margin-bottom: 0.5rem;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 4px), calc(100% - 4px) 100%, 0 100%);
}

.page-about .timeline-desc {
  font-family: var(--body-font);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--page-dark-gray);
  margin: 0;
}

/* 核心价值 */
.page-about .about-values {
  padding: 3rem 0;
  background: var(--page-white);
}

.page-about .values-grid {
  display: grid;
  gap: 1.5rem;
}

.page-about .value-card {
  padding: 2rem 1.5rem;
  background: var(--page-gray-light);
  border: 1px solid var(--page-gray-medium);
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
  perspective: 800px;
}

.page-about .value-card:hover,
.page-about .value-card:focus-within {
  transform: rotateY(2deg) translateY(-6px);
  border-color: var(--page-secondary);
  box-shadow: 0 12px 32px rgba(11, 26, 48, 0.15);
}

.page-about .value-icon-wrap {
  width: 80px;
  height: 80px;
  margin: 0 auto 1rem;
  background: var(--page-primary);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.page-about .value-icon {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  max-width: 100%;
}

.page-about .value-title {
  font-family: var(--heading-font);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--page-primary);
  margin: 0 0 0.75rem;
  text-align: center;
}

.page-about .value-desc {
  font-family: var(--body-font);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--page-dark-gray);
  text-align: center;
  margin: 0;
}

/* 服务范围 */
.page-about .about-service {
  padding: 3rem 0;
  background: var(--page-gradient);
  color: var(--page-white);
}

.page-about .about-service .section-label {
  color: var(--page-white);
}

.page-about .about-service .label-num {
  background: var(--page-secondary);
  color: var(--page-primary);
}

.page-about .service-layout {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 768px) {
  .page-about .service-layout {
    flex-direction: row;
    gap: 3rem;
  }
}

.page-about .service-map {
  flex-shrink: 0;
  position: relative;
}

.page-about .map-wrapper {
  width: 100%;
  max-width: 300px;
  position: relative;
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  background: var(--page-white);
  padding: 0.5rem;
}

.page-about .map-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
  filter: brightness(0.9) contrast(1.1);
  max-width: 100%;
}

.page-about .map-marker {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  background: var(--page-secondary);
  clip-path: polygon(50% 0%, 100% 38%, 82% 100%, 18% 100%, 0% 38%);
  opacity: 0.7;
  animation: pulse-marker 2s ease-in-out infinite;
  pointer-events: none;
}

@keyframes pulse-marker {
  0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.7; }
  50% { transform: translate(-50%, -50%) scale(1.15); opacity: 0.9; }
}

.page-about .service-info {
  flex: 1;
}

.page-about .service-intro {
  font-family: var(--body-font);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--page-gray-light);
  margin: 0 0 1.5rem;
  max-width: 32rem;
}

.page-about .service-icp {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
  background: rgba(255, 255, 255, 0.08);
  padding: 0.75rem 1rem;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%);
}

.page-about .icp-badge {
  font-family: var(--heading-font);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--page-secondary);
  color: var(--page-primary);
  padding: 0.25rem 0.75rem;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 4px), calc(100% - 4px) 100%, 0 100%);
}

.page-about .icp-number {
  font-family: var(--number-font);
  font-size: 0.9rem;
  color: var(--page-white);
}

.page-about .service-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-about .btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  background: var(--page-secondary);
  color: var(--page-primary);
  font-family: var(--heading-font);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  border: 2px solid var(--page-secondary);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: background 0.2s, color 0.2s, transform 0.2s;
  cursor: pointer;
}

.page-about .btn-cta:hover,
.page-about .btn-cta:focus-visible {
  background: transparent;
  color: var(--page-secondary);
  transform: translateY(-2px);
}

.page-about .btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.75rem;
  background: transparent;
  color: var(--page-white);
  font-family: var(--heading-font);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  border: 2px solid var(--page-white);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: background 0.2s, color 0.2s, transform 0.2s;
  cursor: pointer;
}

.page-about .btn-outline:hover,
.page-about .btn-outline:focus-visible {
  background: var(--page-white);
  color: var(--page-primary);
  transform: translateY(-2px);
}

/* 联系我们 */
.page-about .about-contact {
  padding: 3rem 0;
  background: var(--page-gray-light);
}

.page-about .contact-card {
  padding: 2rem 1.5rem;
  background: var(--page-white);
  border-left: 6px solid var(--page-secondary);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .page-about .contact-card {
    flex-direction: row;
    gap: 2rem;
    padding: 2.5rem 2rem;
  }
}

.page-about .contact-item {
  flex: 1;
}

.page-about .contact-label {
  display: block;
  font-family: var(--heading-font);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--page-secondary);
  margin-bottom: 0.5rem;
}

.page-about .contact-value {
  font-family: var(--body-font);
  font-size: 1rem;
  color: var(--page-primary);
  word-break: break-word;
}

.page-about .contact-value a {
  color: var(--page-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
}

.page-about .contact-value a:hover,
.page-about .contact-value a:focus-visible {
  color: var(--page-secondary);
}

.page-about .contact-note {
  font-family: var(--body-font);
  font-size: 0.85rem;
  color: var(--page-dark-gray);
  margin: 0.5rem 0 0;
  font-style: italic;
}

/* 响应式 */
@media (max-width: 767px) {
  .page-about .hero-title {
    font-size: 2rem;
  }
  .page-about .hero-subtitle {
    font-size: 1rem;
  }
  .page-about .section-label {
    font-size: 1.5rem;
  }
  .page-about .service-icp {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (min-width: 768px) {
  .page-about .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 992px) {
  .page-about .hero-title {
    font-size: 3rem;
  }
  .page-about .hero-text {
    padding-bottom: 4rem;
  }
}