body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

nav, main, footer {
  padding: 20px;
  text-align: center;
}

header {
  background-color: #f1f1f1;
  color: #0a0a0a;
  padding: 5px;
  text-align: center;
}

.banner {
  background-color: #ccc;
  height: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2em;
  color: #555;
}
.homeImg{
  height: 400px;
  width: 100%;
}

footer {
  background-color: #222;
  color: #fff;
  padding: 10px;
}

nav {
  display: flex;
  justify-content: center; /* 导航栏内容居中 */
  align-items: center;
  position: relative; /* 相对定位，为图标留出空间 */
  background-color: #f8f9fa;
  padding: 10px 20px;
  height: 70px;
}

/* 图标样式 */
.logo {
  position: absolute; /* 绝对定位 */
  left: 20px; /* 图标距离左边20px */
  top: 50%; /* 垂直居中 */
  transform: translateY(-50%); /* 调整为垂直中心 */
  width: 100px;
  height: 70px;
  cursor: pointer;
}

/* 导航链接样式 */
nav a {
  margin: 0 15px;
  text-decoration: none;
  color: #000;
  font-size: 16px;
}

nav a:hover {
  color: #007bff;
}