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

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
}

/* 导航栏样式 */
#navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: #333;
  color: white;
  z-index: 1000;
}

#navbar ul {
  list-style: none;
  display: flex;
  justify-content: center;
}

#navbar ul li {
  margin: 0 20px;
}

#navbar ul li a {
  color: white;
  text-decoration: none;
  padding: 15px;
  display: block;
}

/* 各个页面部分样式 */
section {
  padding: 60px 20px;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
}

#home {
  background-color: #f4f4f4;
}

#about {
  background-color: #e2e2e2;
}

#services {
  background-color: #ccc;
}

#contact {
  background-color: #b4b4b4;
}

/* 响应式设计 */
@media (max-width: 768px) {
  #navbar ul {
    flex-direction: row;
  }

  #navbar ul li {
    margin: 10px 0;
  }
}