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

:root {
  --primary-color: #0066cc;
  --secondary-color: #004499;
  --accent-color: #ff9900;
  --text-dark: #333333;
  --text-light: #666666;
  --bg-light: #f8f9fa;
  --white: #ffffff;
  --shadow: 0 2px 10px rgba(0,0,0,0.1);
  --transition: all 0.3s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--white);
}

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

.header {
  background: var(--white);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo img {
  height: 50px;
  width: auto;
}

.logo-text {
  font-size: 24px;
  font-weight: bold;
  color: var(--primary-color);
  margin-left: 10px;
}

.nav {
  display: flex;
  gap: 30px;
}

.nav a {
  text-decoration: none;
  color: var(--text-dark);
  font-size: 16px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
}

.nav a:hover {
  color: var(--primary-color);
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: var(--transition);
}

.nav a:hover::after {
  width: 100%;
}

.top-contact {
  background: var(--primary-color);
  color: var(--white);
  padding: 8px 0;
  text-align: center;
  font-size: 14px;
  font-weight: 500;
}

.banner {
  position: relative;
  height: 500px;
  overflow: hidden;
  background: linear-gradient(135deg, #0066cc 0%, #004499 100%);
}

.banner-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: var(--white);
  z-index: 2;
}

.banner h1 {
  font-size: 48px;
  margin-bottom: 20px;
  animation: fadeInUp 1s ease;
}

.banner p {
  font-size: 20px;
  margin-bottom: 30px;
  animation: fadeInUp 1s ease 0.3s both;
}

.banner-btn {
  display: inline-block;
  padding: 15px 40px;
  background: var(--accent-color);
  color: var(--white);
  text-decoration: none;
  border-radius: 5px;
  font-size: 18px;
  font-weight: bold;
  transition: var(--transition);
  animation: fadeInUp 1s ease 0.6s both;
}

.banner-btn:hover {
  background: #ff8800;
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(255,153,0,0.3);
}

.banner-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.particle {
  position: absolute;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  animation: float 15s infinite;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translateY(-100vh) rotate(720deg);
    opacity: 0;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 60px;
}

.section-title h2 {
  font-size: 36px;
  color: var(--text-dark);
  margin-bottom: 15px;
}

.section-title p {
  font-size: 16px;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.timeline-grid {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  padding: 20px 0;
}

.timeline-grid .service-card {
  flex: 0 0 250px;
  min-width: 200px;
}

.service-card {
  background: var(--white);
  padding: 40px 30px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-align: center;
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.service-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 36px;
  color: var(--white);
}

.service-card h3 {
  font-size: 22px;
  margin-bottom: 15px;
  color: var(--text-dark);
}

.service-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
}

.about-section {
  background: var(--bg-light);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-image img {
  width: 100%;
  border-radius: 10px;
  box-shadow: var(--shadow);
}

.about-text h3 {
  font-size: 28px;
  margin-bottom: 20px;
  color: var(--primary-color);
}

.about-text p {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 15px;
  line-height: 1.8;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-top: 40px;
}

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

.stat-number {
  font-size: 36px;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 5px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-light);
}

.faq-section {
  background: var(--bg-light);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.faq-item {
  background: var(--white);
  padding: 25px;
  border-radius: 10px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.faq-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.12);
}

.faq-question {
  font-size: 18px;
  font-weight: bold;
  color: var(--text-dark);
  margin-bottom: 15px;
  position: relative;
  padding-left: 30px;
}

.faq-question::before {
  content: 'Q';
  position: absolute;
  left: 0;
  top: 0;
  font-size: 24px;
  color: var(--primary-color);
  font-weight: bold;
}

.faq-answer {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
  position: relative;
  padding-left: 30px;
}

.faq-answer::before {
  content: 'A';
  position: absolute;
  left: 0;
  top: 0;
  font-size: 24px;
  color: var(--accent-color);
  font-weight: bold;
}

.contact-section {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--white);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contact-info h3 {
  font-size: 28px;
  margin-bottom: 30px;
}

.contact-item {
  display: flex;
  align-items: center;
  margin-bottom: 20px;
  font-size: 16px;
}

.contact-item-icon {
  width: 40px;
  height: 40px;
  background: rgba(255,255,255,0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 15px;
  font-size: 18px;
}

.qr-codes {
  display: flex;
  gap: 30px;
  margin-top: 30px;
}

.qr-code {
  text-align: center;
}

.qr-code img {
  width: 150px;
  height: 150px;
  border-radius: 10px;
  background: var(--white);
  padding: 10px;
}

.qr-code p {
  font-size: 14px;
  margin-top: 10px;
}

.contact-form {
  background: var(--white);
  padding: 40px;
  border-radius: 10px;
  color: var(--text-dark);
}

.contact-form h3 {
  font-size: 24px;
  margin-bottom: 30px;
  color: var(--primary-color);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-dark);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid #ddd;
  border-radius: 5px;
  font-size: 14px;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0,102,204,0.1);
}

.form-group textarea {
  height: 120px;
  resize: vertical;
}

.submit-btn {
  width: 100%;
  padding: 15px;
  background: var(--primary-color);
  color: var(--white);
  border: none;
  border-radius: 5px;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  transition: var(--transition);
}

.submit-btn:hover {
  background: var(--secondary-color);
  transform: translateY(-2px);
  box-shadow: 0 5px 20px rgba(0,102,204,0.3);
}

.footer {
  background: #1a1a1a;
  color: #999;
  padding: 40px 0 20px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}

.footer-section h4 {
  font-size: 18px;
  color: var(--white);
  margin-bottom: 20px;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: 10px;
}

.footer-section ul li a {
  color: #999;
  text-decoration: none;
  transition: var(--transition);
}

.footer-section ul li a:hover {
  color: var(--white);
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid #333;
  font-size: 14px;
}

@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    gap: 15px;
  }
  
  .nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
  }
  
  .banner {
    height: 400px;
  }
  
  .banner h1 {
    font-size: 32px;
  }
  
  .banner p {
    font-size: 16px;
  }
  
  .about-content,
  .contact-content {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .faq-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .qr-codes {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .banner {
    height: 300px;
  }
  
  .banner h1 {
    font-size: 24px;
  }
  
  .banner p {
    font-size: 14px;
  }
  
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}