* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --ink: #2c2825;
  --ink-light: #6b645c;
  --paper: #f7f3ec;
  --paper-deep: #efe8dc;
  --accent: #8c3f2b;
  --accent-dark: #6f3122;
  --line: #ddd3c3;
}

body {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.8;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-dark);
  text-decoration: underline;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 顶部 */
.site-header {
  background: var(--ink);
  color: var(--paper);
  padding: 56px 0 44px;
  text-align: center;
  border-bottom: 4px solid var(--accent);
}

.site-header h1 {
  font-size: 2.2rem;
  letter-spacing: 0.35em;
  text-indent: 0.35em;
  margin-bottom: 12px;
}

.site-header .subtitle {
  color: #c8bfb0;
  font-size: 0.95rem;
  letter-spacing: 0.15em;
}

/* 导航 */
.site-nav {
  background: var(--paper-deep);
  border-bottom: 1px solid var(--line);
}

.site-nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 40px;
  padding: 12px 0;
}

.site-nav a {
  color: var(--ink);
  font-size: 0.95rem;
  letter-spacing: 0.1em;
}

.site-nav a:hover {
  color: var(--accent);
}

/* 主体 */
main {
  padding: 48px 0 64px;
  min-height: 50vh;
}

.section-title {
  font-size: 1.3rem;
  border-left: 4px solid var(--accent);
  padding-left: 12px;
  margin-bottom: 28px;
  letter-spacing: 0.1em;
}

/* 笔记卡片 */
.note-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.note-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 22px 26px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.note-card:hover {
  box-shadow: 0 4px 14px rgba(44, 40, 37, 0.1);
  transform: translateY(-2px);
}

.note-card h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.note-card h3 a {
  color: var(--ink);
}

.note-card h3 a:hover {
  color: var(--accent);
  text-decoration: none;
}

.note-meta {
  font-size: 0.82rem;
  color: var(--ink-light);
  margin-bottom: 10px;
}

.note-meta .tag {
  display: inline-block;
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 0 8px;
  margin-right: 6px;
  font-size: 0.78rem;
}

.note-card p {
  color: var(--ink-light);
  font-size: 0.95rem;
}

/* 文章页 */
.article {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 40px 48px;
}

.article h1 {
  font-size: 1.6rem;
  margin-bottom: 8px;
}

.article .note-meta {
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.article h2 {
  font-size: 1.2rem;
  margin: 28px 0 12px;
  color: var(--accent-dark);
}

.article p {
  margin-bottom: 14px;
}

.article pre {
  background: var(--ink);
  color: #e8e0d2;
  padding: 16px 20px;
  border-radius: 4px;
  overflow-x: auto;
  margin-bottom: 16px;
  font-size: 0.88rem;
  line-height: 1.6;
}

.article code {
  font-family: "JetBrains Mono", Consolas, monospace;
}

.article ul, .article ol {
  margin: 0 0 14px 24px;
}

.article blockquote {
  border-left: 3px solid var(--accent);
  background: var(--paper);
  padding: 10px 16px;
  margin-bottom: 14px;
  color: var(--ink-light);
}

.back-link {
  display: inline-block;
  margin-bottom: 20px;
  font-size: 0.9rem;
}

/* 关于 */
.about-box {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 26px 30px;
  margin-top: 48px;
}

.about-box h2 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.about-box p {
  color: var(--ink-light);
  font-size: 0.95rem;
  margin-bottom: 8px;
}

/* 页脚 */
.site-footer {
  background: var(--ink);
  color: #a89e8e;
  text-align: center;
  padding: 28px 0;
  font-size: 0.85rem;
  line-height: 2;
}

.site-footer a {
  color: #c8bfb0;
}

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

@media (max-width: 600px) {
  .site-header h1 {
    font-size: 1.5rem;
  }
  .article {
    padding: 24px 20px;
  }
  .site-nav ul {
    gap: 20px;
  }
}