/* 通用样式 */
body {
  margin: 0;
  font-family: Arial, sans-serif;
  background-color: #f5f5f5;
  color: #333;
}

.container {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 250px;
  background-color: #2c3e50;
  color: white;
  padding: 20px;
  box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: fixed; /* 固定左侧栏 */
  top: 0;
  bottom: 0;
  left: 0;
  transition: left 0.3s ease-in-out; /* 平滑过渡 */
  z-index: 1000; /* 确保在最上层 */
}

.sidebar.active {
  left: 0; /* 显示左侧栏 */
}

.sidebar-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-grow: 1;
}

/* 图像和名称居中 */
.sidebar .avatar {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  margin: 0 auto 20px auto;
  display: block;
}

.sidebar h2 {
  margin: 0 auto 20px auto;
  font-size: 1.5em;
  color: #ecf0f1;
  text-align: center;
}

/* 导航链接居中 */
.sidebar .navigation {
  text-align: center;
}

.sidebar .navigation a {
  display: block;
  color: #ecf0f1;
  padding: 10px 0;
  border-bottom: 1px solid #34495e;
  text-decoration: none;
  transition: background-color 0.3s;
  text-align: center;
}

.sidebar .navigation a:hover {
  background-color: #34495e;
}

/* GitHub链接样式 */
.sidebar .github-link {
  display: block;
  color: #ecf0f1;
  padding: 10px 0;
  text-decoration: none;
  transition: background-color 0.3s;
  margin-top: auto; /* 确保链接在底部 */
  text-align: center;
  margin-bottom: 20px; /* 与下边框对齐，留出20px */
}

.sidebar .github-link:hover {
  background-color: #34495e;
}

/* 右侧内容区 */
.content {
  flex-grow: 1;
  padding: 20px;
  margin-left: 300px; /* 确保右侧内容在左侧栏右侧显示 */
  overflow-y: auto; /* 允许右侧内容区滚动 */
  display: flex;
  flex-direction: column;
  gap: 20px;
  transition: margin-left 0.3s ease-in-out; /* 平滑过渡 */
}

.content-section {
  background-color: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  margin-bottom: 20px;
}

.content-section h3 {
  font-size: 1.5em;
  margin: 0 0 10px 0;
  color: #333;
}

.content-section p {
  font-size: 0.9em;
  color: #666;
}

.overview-box {
  background-color: #fff;
  padding: 15px;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  transition: transform 0.2s;
}

.overview-box:hover {
  transform: translateY(-5px);
}

.overview-box h4 {
  margin: 0 0 10px 0;
  color: #2c3e50;
  font-weight: bold;
}

.overview-box p {
  color: #7f8c8d;
  font-size: 0.9em;
}

.placeholder {
  text-align: center;
  color: #95a5a6;
  padding: 20px;
}

/* 链接样式 */
a {
  color: #3498db;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* 侧边栏切换按钮 */
.sidebar-toggle {
  width: 30px;
  height: 50px;
  background-color: rgba(76, 189, 255, 0.5);
  position: fixed;
  top: 100px;
  left: 0;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  font-size: 1.5em;
  transition: background-color 0.3s ease-in-out;
  display: none; /* 初始隐藏 */
  border-radius: 0 25px 25px 0; /* 半圆形状 */
}

.sidebar-toggle:hover {
  background-color: rgba(0, 0, 0, 0.8);
}

/* 响应式设计：针对手机设备 */
@media (max-width: 768px) {
  .sidebar {
    left: -300px; /* 初始隐藏 */
  }

  .sidebar.active {
    left: 0; /* 显示左侧栏 */
  }

  .content {
    margin-left: 0; /* 右侧内容全屏显示 */
    padding: 60px 10px 10px; /* 避免顶部栏影响显示 */
  }

  .sidebar-toggle {
    display: flex; /* 显示侧边栏切换按钮 */
  }
}