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

body {
  font-family: "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.6;
  color: #333;
}

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

header {
  background: linear-gradient(135deg, #2c3e50, #3498db);
  color: white;
  padding: 1rem 0;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo h1 {
  font-size: 1.5rem;
  font-weight: 600;
}

nav ul {
  display: flex;
  list-style: none;
}

nav ul li {
  margin-left: 2rem;
}

nav ul li a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

nav ul li a:hover {
  color: #ecf0f1;
}

main {
  margin-top: 80px;
}

.hero {
  background: linear-gradient(135deg, #3498db, #2c3e50);
  color: white;
  text-align: center;
  padding: 6rem 0;
}

.hero h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  opacity: 0.9;
}

section {
  padding: 4rem 0;
}

section h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 3rem;
  color: #2c3e50;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: center;
}

.about-text p {
  margin-bottom: 1rem;
  font-size: 1.1rem;
  line-height: 1.8;
}

.services {
  background: #f8f9fa;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.service-item {
  background: white;
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

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

.service-item h3 {
  color: #3498db;
  margin-bottom: 1rem;
  font-size: 1.3rem;
}

.service-item p {
  color: #666;
  line-height: 1.6;
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.contact-item {
  background: white;
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

.contact-item h3 {
  color: #2c3e50;
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

.contact-item p {
  color: #666;
  font-size: 1.1rem;
}

footer {
  background: #2c3e50;
  color: white;
  text-align: center;
  padding: 2rem 0;
}

.footer-content {
  border-top: 1px solid #34495e;
  padding-top: 1rem;
}

.footer-content p {
  margin-bottom: 0.5rem;
}

.footer-content a {
  color: inherit;
  text-decoration: none;
}

.footer-content a:visited {
  color: inherit;
}

.footer-content a:hover {
  color: inherit;
}

@media (max-width: 768px) {
  header .container {
    flex-direction: column;
    gap: 1rem;
  }

  nav ul {
    flex-direction: column;
    align-items: center;
  }

  nav ul li {
    margin: 0.5rem 0;
  }

  main {
    margin-top: 120px;
  }

  .hero h2 {
    font-size: 2rem;
  }

  .about-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

  .contact-info {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }

  .hero {
    padding: 4rem 0;
  }

  .hero h2 {
    font-size: 1.8rem;
  }

  .hero p {
    font-size: 1rem;
  }

  section {
    padding: 3rem 0;
  }

  section h2 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
  }
}