/* 全站基础样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Microsoft YaHei", "PingFang SC", -apple-system, "Segoe UI", sans-serif;
  line-height: 1.7;
  color: #333;
  background-color: #f7f8fa;
}

a {
  color: #2b6cb0;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* 顶部导航 */
header.site-header {
  background-color: #fff;
  border-bottom: 1px solid #e5e7eb;
}

.site-header .inner {
  max-width: 900px;
  margin: 0 auto;
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.site-header .site-title {
  font-size: 20px;
  font-weight: bold;
  color: #1a202c;
}

.site-header nav a {
  margin-left: 20px;
  color: #4a5568;
  font-size: 15px;
}

.site-header nav a:hover,
.site-header nav a.active {
  color: #2b6cb0;
  text-decoration: none;
}

/* 主体区域 */
main {
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 20px;
}

.page-title {
  font-size: 26px;
  color: #1a202c;
  margin-bottom: 8px;
}

.page-desc {
  color: #718096;
  margin-bottom: 28px;
  font-size: 15px;
}

.card {
  background-color: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 20px;
}

.card h2 {
  font-size: 19px;
  color: #1a202c;
  margin-bottom: 10px;
}

.card p {
  color: #4a5568;
  margin-bottom: 10px;
  font-size: 15px;
}

.card .more {
  display: inline-block;
  margin-top: 6px;
  font-size: 14px;
}

/* 首页笔记导航卡片 */
.note-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.note-grid .card {
  margin-bottom: 0;
}

/* 文章内容 */
article h2 {
  font-size: 20px;
  margin: 26px 0 12px;
  color: #1a202c;
  border-left: 4px solid #2b6cb0;
  padding-left: 10px;
}

article h3 {
  font-size: 17px;
  margin: 20px 0 8px;
  color: #2d3748;
}

article p {
  margin-bottom: 12px;
  color: #4a5568;
  font-size: 15px;
}

article ul,
article ol {
  margin: 0 0 12px 24px;
  color: #4a5568;
  font-size: 15px;
}

article pre {
  background-color: #2d3748;
  color: #e2e8f0;
  padding: 14px 16px;
  border-radius: 6px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.6;
  margin-bottom: 14px;
}

article code {
  font-family: Consolas, "Courier New", monospace;
}

article p code,
article li code {
  background-color: #edf2f7;
  color: #c53030;
  padding: 1px 5px;
  border-radius: 4px;
  font-size: 13.5px;
}

article table {
  border-collapse: collapse;
  width: 100%;
  margin-bottom: 14px;
  background-color: #fff;
}

article th,
article td {
  border: 1px solid #e2e8f0;
  padding: 8px 12px;
  font-size: 14px;
  color: #4a5568;
  text-align: left;
}

article th {
  background-color: #f1f5f9;
}

/* 页脚 */
footer.site-footer {
  text-align: center;
  color: #a0aec0;
  font-size: 13px;
  padding: 24px 20px 32px;
}

footer.site-footer a {
  color: #a0aec0;
}

footer.site-footer a:hover {
  color: #718096;
}