/* 全局样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

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

/* 导航栏样式 */
header {
  background-color: #fff;
  box-shadow: 0 2px 5px 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: 20px;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  font-size: 24px;
  font-weight: bold;
  color: #1e88e5;
}

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

.nav-links li {
  margin-left: 30px;
}

.nav-links a {
  text-decoration: none;
  color: #333;
  font-weight: 500;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: #1e88e5;
}

/* 首页英雄区域 */
.hero {
  height: 100vh;
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)),
    url('https://images.unsplash.com/photo-1542744173-8e7e53415bb0?auto=format&fit=crop&q=80');
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  text-align: center;
  color: #fff;
}

.hero-content {
  width: 100%;
  padding: 0 20px;
}

.hero h1 {
  font-size: 48px;
  margin-bottom: 20px;
}

.hero p {
  font-size: 24px;
  margin-bottom: 30px;
}

.cta-button {
  display: inline-block;
  padding: 15px 30px;
  background-color: #1e88e5;
  color: #fff;
  text-decoration: none;
  border-radius: 5px;
  transition: background-color 0.3s;
}

.cta-button:hover {
  background-color: #1565c0;
}

/* 关于我们部分 */
.about {
  padding: 80px 0;
  background-color: #f5f5f5;
}

.mission-vision {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.card {
  background: #fff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

/* 核心业务部分 */
.services {
  padding: 80px 0;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.service-icon i,
.advantage-icon i {
  font-size: 2.5rem;
  color: #1e88e5;
}

.service-icon,
.advantage-icon {
  margin: 0 auto 20px;
}

.service-card {
  background: #fff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s;
  text-align: center;
}

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

/* 核心优势部分 */
.advantages {
  padding: 80px 0;
  background-color: #f5f5f5;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.advantage-card {
  background: #fff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
  text-align: center;
}

/* 服务案例部分 */
.cases {
  padding: 80px 0;
}

.cases-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.case-highlight,
.achievements {
  background: #fff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

.achievements ul {
  list-style-position: inside;
  margin-top: 20px;
}

/* 页脚样式 */
footer {
  background-color: #333;
  color: #fff;
  padding: 60px 0 20px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

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

.footer-links a {
  color: #fff;
  text-decoration: none;
  transition: color 0.3s;
}

.footer-links a:hover {
  color: #1e88e5;
}

.copyright {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.copyright p {
  margin: 5px 0;
}

.copyright a {
  color: #fff;
  text-decoration: none;
  opacity: 0.8;
  transition: opacity 0.3s;
}

.copyright a:hover {
  opacity: 1;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero p {
    font-size: 18px;
  }
}