/* 通用样式 */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f5f5f5;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Header 和 Footer 样式 */
header, footer {
  background-color: #333;
  color: white;
  padding: 10px 0;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.mainnavArea {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}

.main-logo img {
  max-width: 150px;
}

.main-nav {
  flex-grow: 1;
}

.main-nav ul {
  display: flex;
  justify-content: space-around;
  list-style-type: none;
  padding: 0;
  margin: 0;
}

.main-nav a {
  color: white;
  text-decoration: none;
  padding: 10px;
  font-size: 16px;
  transition: background-color 0.3s ease;
}

.main-nav a:hover {
  background-color: #555;
  border-radius: 5px;
}
/* Footer 通用样式 */
footer {
  background-color: #333;
  color: white;
  padding: 20px 0;
  text-align: center;
}

.footerInner {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.footer-nav {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-nav li {
  margin: 0 15px;
}

.footer-nav a {
  color: white;
  text-decoration: none;
  font-size: 16px;
  transition: color 0.3s ease;
}

.footer-nav a:hover {
  text-decoration: underline;
  color: #ddd;
}

#totop a {
  color: white;
  font-size: 20px;
  margin-left: 30px;
  text-decoration: none;
}

#totop a:hover {
  color: #aaa;
}

.copyright2 p {
  font-size: 14px;
  color: #ccc;
  margin-top: 10px;
} 



/* 主要内容区 */
main {
  flex-grow: 1;
  width: 100%;
  max-width: 1200px; /* 最大宽度限制 */
  margin: 20px auto;
  padding: 20px;
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
}

h1, h2 {
  color: #333;
  text-align: center;
  margin-bottom: 20px;
}

p {
  line-height: 1.6;
  font-size: 16px;
  color: #555;
}

h2 {
  text-align: left;
  margin-left: 20px; /* 可根据需要调整距离 */
}
table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 30px;
}

th, td {
  padding: 12px;
  border: 1px solid #ccc;
  text-align: left; /* 让 th 内容靠左 */
  vertical-align: top;
}

th {
  background-color: #f0f0f0;
  font-weight: bold;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .main-nav ul {
      flex-direction: column;
      align-items: center;
  }
  .main-nav a {
      padding: 10px 0;
  }
  .main-nav a:hover {
      background-color: transparent;
  }
  .main-nav a:first-child {
      margin-top: 10px;
  }
  .main-nav a:last-child {
      margin-bottom: 10px;
  }
  .main-logo img {
      max-width: 100px;
  }
  .mainnavArea {
      padding: 0 10px;
  }
  .main {
      padding: 10px;     /* 可根据需要调整内容区的内边距 */
  }
  h2 {
      margin-left: 10px;
  }
}