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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f5f7fa;
}

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

/* 导航栏 */
header {
  background-color: #fff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  font-size: 1.8rem;
  font-weight: bold;
  color: #2c3e50;
  text-decoration: none;
}

.logo span {
  color: #3498db;
}

.nav-links {
  display: flex;
  list-style: none;
}

.nav-links li {
  margin-left: 2rem;
}

.nav-links a {
  text-decoration: none;
  color: #2c3e50;
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: #3498db;
}

/* 首页横幅 */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  padding: 120px 0 80px;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.btn {
  display: inline-block;
  padding: 12px 30px;
  background-color: #fff;
  color: #3498db;
  text-decoration: none;
  border-radius: 50px;
  font-weight: bold;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.btn:hover {
  background-color: transparent;
  color: #fff;
  border-color: #fff;
}

/* 业务介绍 */
.services {
  padding: 80px 0;
  background-color: #fff;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 3rem;
  color: #2c3e50;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.service-card {
  background-color: #f5f7fa;
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.service-card i {
  font-size: 3rem;
  color: #3498db;
  margin-bottom: 1rem;
}

.service-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: #2c3e50;
}

.service-card p {
  color: #666;
}

/* 解决方案 */
.solutions {
  padding: 80px 0;
  background-color: #fff;
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
}

.solution-card {
  background-color: #f5f7fa;
  padding: 30px;
  border-radius: 10px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.solution-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.solution-card i {
  font-size: 3rem;
  color: #3498db;
  margin-bottom: 1rem;
}

.solution-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: #2c3e50;
}

.solution-card p {
  color: #666;
  margin-bottom: 1.5rem;
}

.solution-card ul {
  list-style: none;
  padding: 0;
}

.solution-card li {
  color: #666;
  margin-bottom: 0.5rem;
  padding-left: 20px;
  position: relative;
}

.solution-card li::before {
  content: "✓";
  color: #3498db;
  position: absolute;
  left: 0;
  font-weight: bold;
}

/* 案例展示 */
.cases {
  padding: 80px 0;
  background-color: #f5f7fa;
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.case-card {
  background-color: #fff;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.case-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.case-image {
  height: 200px;
  overflow: hidden;
  background-color: #e0e0e0;
}

.case-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: #3498db;
  color: #fff;
  font-size: 1.2rem;
  font-weight: bold;
}

.case-content {
  padding: 25px;
}

.case-content h3 {
  font-size: 1.3rem;
  margin-bottom: 0.5rem;
  color: #2c3e50;
}

.case-meta {
  font-size: 0.9rem;
  color: #3498db;
  margin-bottom: 1rem;
  font-weight: 500;
}

.case-content p {
  color: #666;
  line-height: 1.6;
}

/* 资讯动态 */
.news {
  padding: 80px 0;
  background-color: #fff;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.news-item {
  background-color: #f5f7fa;
  padding: 25px;
  border-radius: 10px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.news-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
}

.news-date {
  font-size: 0.9rem;
  color: #3498db;
  margin-bottom: 1rem;
  font-weight: 500;
}

.news-item h3 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: #2c3e50;
}

.news-item h3 a {
  color: #2c3e50;
  text-decoration: none;
  transition: color 0.3s ease;
}

.news-item h3 a:hover {
  color: #3498db;
}

.news-item p {
  color: #666;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.news-more {
  display: inline-block;
  color: #3498db;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

.news-more:hover {
  color: #2980b9;
  text-decoration: underline;
}

/* 关于我们 */
.about {
  padding: 80px 0;
  background-color: #f5f7fa;
}

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

.about-text h3 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: #2c3e50;
}

.about-text p {
  margin-bottom: 1rem;
  color: #666;
}

.about-image {
  background-color: #3498db;
  height: 400px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.5rem;
}

/* 联系我们 */
.contact {
  padding: 80px 0;
  background-color: #fff;
}

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

.contact-info h3 {
  font-size: 2.5rem;
  margin-bottom: 3rem;
  color: #2c3e50;
  font-weight: bold;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  margin-bottom: 2.5rem;
  padding: 20px;
  background-color: #f5f7fa;
  border-radius: 10px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.contact-item i {
  font-size: 2rem;
  color: #3498db;
  margin-right: 1.5rem;
  margin-top: 5px;
  flex-shrink: 0;
}

.contact-item div {
  flex: 1;
}

.contact-item h4 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: #2c3e50;
  font-weight: 600;
}

.contact-item p {
  color: #666;
  font-size: 1.1rem;
  line-height: 1.6;
  margin: 0;
}

/* 页脚 */
footer {
  background-color: #2c3e50;
  color: #fff;
  padding: 40px 0;
  text-align: center;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-bottom: 2rem;
}

.footer-section h3 {
  margin-bottom: 1rem;
  color: #3498db;
}

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

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section ul li a {
  color: #fff;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-section ul li a:hover {
  color: #3498db;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 1rem;
}

.social-links a {
  color: #fff;
  font-size: 1.5rem;
  transition: color 0.3s ease;
}

.social-links a:hover {
  color: #3498db;
}

.copyright {
  border-top: 1px solid #34495e;
  padding-top: 20px;
  margin-top: 20px;
  color: #bdc3c7;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .about-content,
  .contact-content {
    grid-template-columns: 1fr;
  }
  
  .services-grid,
  .solutions-grid,
  .cases-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }
  
  .solution-card,
  .case-card,
  .news-item {
    padding: 20px;
  }
  
  .section-title {
    font-size: 2rem;
  }
}