body {
  font-family: sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f9f9f9;
  color: #333;
}
header {
  background-color: #333;
  color: #fff;
  padding: 2rem;
  text-align: center;
}
h1.title {
  margin: 0;
  font-size: 2.5rem;
}
/* 移除月份导航和日期列表样式，改用网格布局显示全年周日 */

/* 年份标题样式 */
#yearHeading {
  margin-top: 0.5rem;
  font-size: 1.5rem;
  color: #fff;
}

/* 网格容器，用于排列一年的周日格子 */
#grid {
  padding: 1rem;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
  justify-items: stretch;
}

/* 网格中的格子样式 */
#grid .grid-item {
  background-color: #eee;
  border-radius: 6px;
  padding: 0.75rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  transition: background-color 0.2s;
}

#grid .grid-item:hover {
  background-color: #ddd;
}

#grid .grid-item .date {
  font-weight: bold;
  margin-bottom: 0.3rem;
}

#grid .grid-item .title {
  font-size: 0.85rem;
  color: #555;
}
section#articleContent {
  padding: 1rem 2rem;
  max-width: 800px;
  margin: auto;
  background-color: #fff;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  border-radius: 6px;
  margin-bottom: 2rem;
}
section#articleContent h2 {
  margin-top: 0;
}