* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: #f8f9fa;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.main-header {
  background: linear-gradient(135deg, #0a2463 0%, #1e3a8a 100%);
  padding: 15px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 12px rgba(10, 36, 99, 0.3);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-area img {
  display: block;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 35px;
}

.nav-menu a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  font-size: 16px;
  transition: color 0.3s;
}

.nav-menu a:hover {
  color: #60a5fa;
}

/* Quick Nav */
.quick-nav {
  position: fixed;
  right: 30px;
  top: 50%;
  transform: translateY(-50%);
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  padding: 10px;
  z-index: 999;
}

.quick-nav .nav-item {
  display: block;
  width: 70px;
  padding: 10px;
  margin: 5px 0;
  background: #f1f5f9;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  color: #1e3a8a;
  transition: all 0.3s;
}

.quick-nav .nav-item:hover {
  background: #1e3a8a;
  color: #fff;
}

/* Hero Banner */
.hero-banner {
  background: linear-gradient(135deg, #0a2463 0%, #1e3a8a 50%, #3b82f6 100%);
  color: #fff;
  padding: 100px 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.1)"/></svg>');
  opacity: 0.3;
}

.banner-content {
  max-width: 1000px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.hero-banner h1 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 25px;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.banner-desc {
  font-size: 18px;
  line-height: 1.8;
  margin-bottom: 40px;
  opacity: 0.95;
}

.cta-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  margin-bottom: 50px;
}

.cta-primary, .cta-secondary {
  padding: 16px 40px;
  font-size: 18px;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s;
}

.cta-primary {
  background: #f59e0b;
  color: #fff;
  box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
  animation: pulse 2s infinite;
}

.cta-primary:hover {
  background: #d97706;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.6);
}

.cta-secondary {
  background: transparent;
  color: #fff;
  border: 2px solid #fff;
}

.cta-secondary:hover {
  background: #fff;
  color: #1e3a8a;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.banner-stats {
  display: flex;
  justify-content: center;
  gap: 60px;
  margin-top: 40px;
}

.stat-item {
  text-align: center;
}

.stat-num {
  display: block;
  font-size: 36px;
  font-weight: 700;
  color: #fbbf24;
}

.stat-label {
  display: block;
  font-size: 14px;
  margin-top: 5px;
  opacity: 0.9;
}

/* Sections */
section {
  padding: 80px 20px;
}

section h2 {
  font-size: 36px;
  color: #0a2463;
  text-align: center;
  margin-bottom: 20px;
  font-weight: 700;
}

section > .container > p {
  text-align: center;
  font-size: 16px;
  color: #4b5563;
  max-width: 900px;
  margin: 0 auto 50px;
  line-height: 1.8;
}

/* Intro Section */
.intro-section {
  background: #fff;
}

.intro-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.intro-text p {
  text-align: left;
  margin-bottom: 15px;
}

.intro-image img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* Features Section */
.features-section {
  background: #f8fafc;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.feature-card {
  background: #fff;
  padding: 35px;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  transition: all 0.3s;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(10, 36, 99, 0.15);
}

.feature-icon {
  font-size: 48px;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 22px;
  color: #1e3a8a;
  margin-bottom: 15px;
}

.feature-card p {
  color: #6b7280;
  line-height: 1.7;
}

/* Tech Section */
.tech-section {
  background: #fff;
}

.tech-intro {
  margin-bottom: 40px;
}

.tech-desc {
  text-align: center;
  margin-bottom: 30px;
}

.tech-images {
  display: flex;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.tech-images img {
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s;
}

.tech-images img:hover {
  transform: scale(1.05);
  cursor: pointer;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
  max-width: 1200px;
  margin: 0 auto;
}

.tech-item {
  background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
  padding: 30px;
  border-radius: 10px;
  border-left: 4px solid #1e3a8a;
}

.tech-item h3 {
  font-size: 20px;
  color: #0a2463;
  margin-bottom: 12px;
}

.tech-item p {
  color: #4b5563;
  line-height: 1.7;
}

/* Comparison Table */
.comparison-section {
  background: #f8fafc;
}

.comparison-table {
  width: 100%;
  max-width: 1000px;
  margin: 30px auto;
  border-collapse: collapse;
  background: #fff;
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
  border-radius: 10px;
  overflow: hidden;
}

.comparison-table thead {
  background: linear-gradient(135deg, #0a2463 0%, #1e3a8a 100%);
  color: #fff;
}

.comparison-table th {
  padding: 18px;
  font-size: 16px;
  font-weight: 600;
  text-align: left;
}

.comparison-table td {
  padding: 16px 18px;
  border-bottom: 1px solid #e5e7eb;
  color: #374151;
}

.comparison-table tbody tr:hover {
  background: #f9fafb;
}

.comparison-table tbody tr td:first-child {
  font-weight: 600;
  color: #1e3a8a;
}

/* Cases Section */
.cases-section {
  background: #fff;
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.case-card {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  padding: 30px;
  border-radius: 12px;
  border-top: 4px solid #f59e0b;
}

.case-card h3 {
  font-size: 20px;
  color: #92400e;
  margin-bottom: 15px;
}

.case-card p {
  color: #78350f;
  line-height: 1.7;
  margin-bottom: 10px;
}

/* Guide Section */
.guide-section {
  background: #f8fafc;
}

.guide-intro {
  text-align: center;
  margin-bottom: 40px;
}

.guide-intro p {
  margin-bottom: 30px;
}

.report-demo {
  max-width: 600px;
  width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 6px 25px rgba(0, 0, 0, 0.15);
  border: 3px solid #1e3a8a;
}

.steps-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.step-item {
  background: #fff;
  padding: 35px;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  text-align: center;
}

.step-num {
  display: inline-block;
  width: 60px;
  height: 60px;
  line-height: 60px;
  background: linear-gradient(135deg, #0a2463 0%, #1e3a8a 100%);
  color: #fff;
  border-radius: 50%;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
}

.step-item h3 {
  font-size: 22px;
  color: #1e3a8a;
  margin-bottom: 15px;
}

.step-item p {
  color: #6b7280;
  line-height: 1.7;
}

/* Types Section */
.types-section {
  background: #fff;
}

.types-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 25px;
  max-width: 1200px;
  margin: 0 auto;
}

.type-item {
  background: #f0f9ff;
  padding: 25px;
  border-radius: 10px;
  border-left: 4px solid #3b82f6;
}

.type-item h3 {
  font-size: 18px;
  color: #1e3a8a;
  margin-bottom: 10px;
}

.type-item p {
  color: #4b5563;
  line-height: 1.6;
}

/* FAQ Section */
.faq-section {
  background: #f8fafc;
}

.faq-list {
  max-width: 900px;
  margin: 0 auto;
}

.faq-item {
  background: #fff;
  padding: 25px;
  margin-bottom: 20px;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.faq-item h3 {
  font-size: 18px;
  color: #0a2463;
  margin-bottom: 12px;
}

.faq-item p {
  color: #4b5563;
  line-height: 1.7;
}

/* Partners Section */
.partners-section {
  background: #fff;
  padding: 60px 20px;
}

.partners-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 30px;
  background: #f8fafc;
  border-radius: 12px;
}

.partners-logos img {
  height: 50px;
  width: auto;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.7;
  transition: all 0.3s;
}

.partners-logos img:hover {
  filter: grayscale(0%);
  opacity: 1;
  transform: scale(1.1);
}

/* Advantages Section */
.advantages-section {
  background: #fff;
}

.advantages-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.adv-item {
  display: flex;
  align-items: flex-start;
  gap: 15px;
  background: #f0f9ff;
  padding: 20px;
  border-radius: 8px;
}

.adv-num {
  flex-shrink: 0;
  width: 35px;
  height: 35px;
  line-height: 35px;
  text-align: center;
  background: #1e3a8a;
  color: #fff;
  border-radius: 50%;
  font-weight: 700;
}

.adv-item p {
  color: #374151;
  line-height: 1.6;
}

/* Knowledge Section */
.knowledge-section {
  background: #f8fafc;
}

.knowledge-visual {
  text-align: center;
  margin-bottom: 40px;
}

.knowledge-visual img {
  max-width: 700px;
  width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
}

.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.knowledge-card {
  background: #fff;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.knowledge-card h3 {
  font-size: 20px;
  color: #1e3a8a;
  margin-bottom: 15px;
}

.knowledge-card p {
  color: #6b7280;
  line-height: 1.7;
  margin-bottom: 10px;
}

/* CTA Section */
.cta-section {
  background: linear-gradient(135deg, #0a2463 0%, #1e3a8a 100%);
  color: #fff;
  text-align: center;
}

.cta-section h2 {
  color: #fff;
}

.cta-section p {
  color: #fff !important;
  opacity: 0.95;
}

/* Interaction Section */
.interaction-section {
  background: #fff;
  padding: 40px 20px;
}

.interaction-tools {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.tool-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  cursor: pointer;
  font-size: 16px;
  transition: all 0.3s;
}

.tool-btn:hover {
  background: #1e3a8a;
  color: #fff;
  border-color: #1e3a8a;
}

.tool-btn .icon {
  font-size: 20px;
}

.tool-btn .count {
  font-weight: 600;
}

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: #1e3a8a;
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 24px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s;
  z-index: 998;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: #0a2463;
  transform: translateY(-3px);
}

/* Footer */
.main-footer {
  background: #0f172a;
  color: #cbd5e1;
  padding: 50px 20px 30px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-info {
  text-align: center;
  margin-bottom: 30px;
}

.footer-info p {
  margin: 8px 0;
  font-size: 14px;
}

.footer-buttons {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.footer-btn {
  padding: 8px 20px;
  background: #1e293b;
  color: #cbd5e1;
  border: 1px solid #334155;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  transition: all 0.3s;
}

.footer-btn:hover {
  background: #334155;
  border-color: #475569;
}

.footer-notice {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid #334155;
}

.footer-notice p {
  margin: 5px 0;
  font-size: 13px;
  opacity: 0.8;
}

/* Responsive */
@media (max-width: 768px) {
  .quick-nav {
    display: none;
  }
  
  .nav-menu {
    gap: 15px;
    font-size: 14px;
  }
  
  .hero-banner h1 {
    font-size: 32px;
  }
  
  .banner-desc {
    font-size: 16px;
  }
  
  .banner-stats {
    flex-direction: column;
    gap: 20px;
  }
  
  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .cta-primary, .cta-secondary {
    width: 100%;
    max-width: 300px;
  }
  
  section h2 {
    font-size: 28px;
  }
  
  .intro-content {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  
  .intro-text p {
    text-align: center;
  }
  
  .tech-images {
    flex-direction: column;
    align-items: center;
  }
  
  .tech-images img {
    max-width: 100%;
  }
  
  .partners-logos {
    gap: 25px;
  }
  
  .partners-logos img {
    height: 40px;
  }
  
  .features-grid,
  .tech-grid,
  .cases-grid,
  .steps-container,
  .types-grid,
  .advantages-list,
  .knowledge-grid {
    grid-template-columns: 1fr;
  }
  
  .comparison-table {
    font-size: 14px;
  }
  
  .comparison-table th,
  .comparison-table td {
    padding: 12px 10px;
  }
}