.center-intro-wrapper {
  padding-bottom: 40px;
  background: #fafbfc;
  min-height: 100vh;
}

.banner-container {
  position: relative;
  width: 100%;
  height: 300px;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-image: url('../images/bcBanner1.png');
  transition: top 0.3s ease;
}

body.nav-scrolled .banner-container {
  top: 70px;
}

.center-intro-wrapper {
  /* padding-top: 240px; */
  padding-top: 150px;
  transition: padding-top 0.3s ease;
}

body.nav-scrolled .center-intro-wrapper {
  padding-top: 70px;
}

.content-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
}

.center-intro-content {
  display: flex;
  align-items: flex-start;
  width: 100%;
  gap: 30px;
}

.sidebar {
  width: 220px;
  background: #fff;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  padding-bottom: 20px;
  flex-shrink: 0;
}

.sidebar-title {
  font-size: 20px;
  font-weight: bold;
  color: #222;
  padding: 24px 0 16px 0;
  text-align: center;
  border-bottom: 1px solid #f0f0f0;
}

.sidebar-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-list li {
  padding: 16px 0;
  text-align: center;
  color: #666;
  font-size: 16px;
  cursor: pointer;
  border-left: 4px solid transparent;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}

.sidebar-list li.active,
.sidebar-list li:hover {
  background: #f5f7fa;
  color: #1a3c8b;
  border-left: 4px solid #1a3c8b;
}

.main-content {
  flex: 1;
  background: #fff;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  padding: 40px 48px 32px 48px;
  min-width: 0;
}

.content-section {
  display: none;
  animation: fadeIn 0.4s ease;
}

.content-section.active {
  display: block;
}

.main-title {
  font-size: 24px;
  font-weight: bold;
  color: #222;
  margin-bottom: 12px;
}

.main-subtitle {
  font-size: 16px;
  color: #1a3c8b;
  margin-bottom: 24px;
}

.main-desc p {
  font-size: 15px;
  color: #444;
  line-height: 1.8;
  margin-bottom: 8px;
}

.map-section {
  margin-top: 24px;
  text-align: center;
}

.map-img {
  width: 100%;
  max-width: 840px;
  border-radius: 6px;
  border: 1px solid #eee;
}

/* 宣传手册内容样式 */
.brochure-tabs {
  display: flex;
  border-bottom: 1px solid #e0e0e0;
  margin-bottom: 30px;
  flex-wrap: wrap;
}

.brochure-tab {
  padding: 12px 24px;
  cursor: pointer;
  font-size: 16px;
  color: #666;
  border-bottom: 3px solid transparent;
  transition: all 0.3s;
}

.brochure-tab.active {
  color: #1a3c8b;
  border-bottom-color: #1a3c8b;
  font-weight: bold;
}

.brochure-content {
  display: none;
  animation: fadeIn 0.5s ease;
}

.brochure-content.active {
  display: block;
}

.brochure-section {
  margin-bottom: 40px;
}

.brochure-section h2 {
  font-size: 22px;
  color: #1a3c8b;
  margin-bottom: 15px;
  border-left: 4px solid #1a3c8b;
  padding-left: 10px;
}

.brochure-section p {
  margin-bottom: 15px;
  line-height: 1.8;
}

.brochure-section img {
  max-width: 100%;
  border-radius: 8px;
  margin: 20px 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.service-card {
  background: #f8f9fa;
  border-radius: 8px;
  padding: 20px;
  transition: transform 0.3s, box-shadow 0.3s;
  border-left: 4px solid #1a3c8b;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.service-card h3 {
  color: #1a3c8b;
  margin-bottom: 10px;
}

.advantage-list {
  list-style-type: none;
  margin-top: 20px;
}

.advantage-list li {
  padding: 15px;
  background: #f8f9fa;
  margin-bottom: 10px;
  border-radius: 6px;
  border-left: 4px solid #1a3c8b;
}

.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.ecosystem-item {
  background: #f8f9fa;
  padding: 20px;
  border-radius: 8px;
  text-align: center;
  transition: transform 0.3s;
}

.ecosystem-item:hover {
  transform: translateY(-5px);
}

.ecosystem-item h3 {
  color: #1a3c8b;
  margin-bottom: 10px;
}


.leader-messages {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.leader-item {
  background: #f8f9fa;
  border-radius: 8px;
  padding: 24px;
  border-left: 4px solid #1a3c8b;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.leader-header {
  border-bottom: 1px solid #e0e0e0;
  padding-bottom: 12px;
  margin-bottom: 16px;
}

.timeline {
  position: relative;
  margin-top: 20px;
  padding-left: 20px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: #1a3c8b;
}

.timeline-item {
  position: relative;
  margin-bottom: 24px;
  padding-left: 24px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -9px;
  top: 5px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #1a3c8b;
}

.timeline-date {
  font-weight: bold;
  color: #1a3c8b;
  margin-bottom: 6px;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .center-intro-content {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
  }

  .main-content {
    padding: 24px;
  }
}

.card {
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  padding: 24px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  margin-bottom: 24px;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  color: #1a365d;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 12px;
}

.section-desc {
  font-size: 15px;
  color: #444;
  line-height: 1.8;
  margin-bottom: 18px;
  color: #1a3c8b;
  margin-bottom: 15px;
  border-left: 4px solid #1a3c8b;
  padding-left: 10px;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.process-steps {
  display: flex;
  justify-content: space-between;
  position: relative;
  margin: 40px 0;
}

.process-steps::before {
  content: '';
  position: absolute;
  top: 30px;
  left: 0;
  right: 0;
  height: 2px;
  background: #e2e8f0;
  z-index: 1;
}

.process-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  z-index: 2;
  flex: 1;
}

.step-number {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #4299e1;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  box-shadow: 0 4px 8px rgba(66, 153, 225, 0.3);
}

.step-content {
  text-align: center;
  padding: 0 10px;
}

.step-content h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
  color: #2d3748;
}

.step-content p {
  font-size: 14px;
  color: #718096;
}

@media (max-width: 900px) {
  .center-intro-content {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    order: 1;
  }

  .main-content {
    order: 2;
    padding: 24px 20px;
  }

  .brochure-tabs {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .brochure-tabs::-webkit-scrollbar {
    display: none;
  }

  .brochure-tab {
    white-space: nowrap;
    padding: 10px 20px;
    font-size: 14px;
  }

  .service-grid {
    grid-template-columns: 1fr;
  }

  .ecosystem-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .center-intro-wrapper {
    padding-top: 60px;
  }

  .content-container {
    padding: 0 15px;
  }

  .center-intro-content {
    gap: 20px;
  }

  .main-content {
    padding: 20px 15px;
  }

  .main-title {
    font-size: 20px;
  }

  .main-subtitle {
    font-size: 14px;
  }

  .brochure-section h2 {
    font-size: 18px;
  }

  .brochure-section p {
    font-size: 14px;
  }

  .map-section img {
    width: 100%;
    height: auto;
  }

  .process-steps {
    flex-direction: column;
    align-items: center;
    gap: 30px;
  }

  .process-steps::before {
    display: none;
  }

  .step-number {
    width: 50px;
    height: 50px;
    font-size: 18px;
  }

  .step-content h4 {
    font-size: 15px;
  }

  .step-content p {
    font-size: 13px;
  }

  .breadcrumb {
    padding: 15px 0;
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .main-content {
    padding: 15px 10px;
  }

  .main-title {
    font-size: 18px;
  }

  .main-subtitle {
    font-size: 13px;
  }

  .brochure-tabs {
    margin-bottom: 20px;
  }

  .brochure-tab {
    padding: 8px 16px;
    font-size: 13px;
  }

  .brochure-section {
    margin-bottom: 30px;
  }

  .brochure-section h2 {
    font-size: 16px;
    padding-left: 8px;
  }

  .brochure-section p {
    font-size: 13px;
    line-height: 1.6;
  }

  .service-card {
    padding: 15px;
  }

  .service-card h3 {
    font-size: 15px;
  }

  .advantage-list li {
    padding: 12px;
  }

  .advantage-list li h3 {
    font-size: 15px;
  }

  .ecosystem-item {
    padding: 15px;
  }

  .ecosystem-item h3 {
    font-size: 15px;
  }

  .leader-item {
    padding: 18px;
  }

  .leader-header h3 {
    font-size: 16px;
  }

  .timeline {
    padding-left: 15px;
  }

  .timeline-item {
    padding-left: 20px;
    margin-bottom: 20px;
  }

  .timeline-date {
    font-size: 14px;
  }

  .timeline-content h3 {
    font-size: 15px;
  }

  .timeline-content p {
    font-size: 13px;
  }
}