/* 基础样式 */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  font-family: Arial, sans-serif;
}

.title {
  margin-bottom: 10px;
}

.subtitle {
  margin-bottom: 40px;
  color: #666;
}

/* 粘性导航样式 */
.sticky-nav {
  position: sticky;
  top: 0;
  background-color: white;
  padding: 15px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  z-index: 100;
}

.search-box {
  width: 100%;
  padding: 10px;
  margin-bottom: 15px;
  border: 1px solid #ddd;
  border-radius: 4px;
}

.category-tabs {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 5px;
}

.category-tabs button {
  padding: 8px 16px;
  border: none;
  background-color: #f0f0f0;
  border-radius: 20px;
  cursor: pointer;
  white-space: nowrap;
}

.category-tabs button.active {
  background-color: #007bff;
  color: white;
}

/* 内容区域样式 */
.content-section {
  margin-top: 40px;
  padding: 20px;
  border: 1px solid #eee;
  border-radius: 8px;
}

.content-section h2 {
  margin-bottom: 15px;
}

/* 占位内容，使页面可滚动 */
.placeholder {
  height: 300px;
  background: linear-gradient(to bottom, #f9f9f9, #e9e9e9);
  margin-top: 20px;
  border-radius: 8px;
}