/* post.css — 静态文章页排版（可被搜索引擎 / AI 爬虫直接读取，不依赖 JS）
   复用站点的暖纸质设计令牌，保持与个人品牌站一致的视觉语言 */

:root {
  --bg-page: #f5ecd7;
  --bg-surface: #fff9f0;
  --bg-hover: #e8d5b5;
  --border: #c4a882;
  --border-soft: #d8c4a3;
  --text-primary: #3d2b1f;
  --text-secondary: #5c3d2e;
  --text-muted: #8b7355;
  --accent-amber: #d9a441;
  --accent-coral: #c0693b;
  --font-display: "Playfair Display", "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-body: "Lora", "Noto Serif SC", "Source Han Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-label: "DM Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.85;
  color: var(--text-primary);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; }

/* —— 顶部返回条 —— */
.post-topbar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 12px;
  padding: 14px 22px;
  background: rgba(245, 236, 215, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-soft);
  font-family: var(--font-label);
  font-size: 13px;
}
.post-topbar a { color: var(--text-secondary); text-decoration: none; }
.post-topbar a:hover { color: var(--accent-coral); }
.post-topbar .sep { color: var(--text-muted); }
.post-topbar .spacer { flex: 1; }

/* —— 文章容器 —— */
.post-wrap {
  max-width: 740px;
  margin: 0 auto;
  padding: 48px 22px 96px;
}

.post-head { margin-bottom: 32px; }
.post-head__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(28px, 5vw, 44px);
  line-height: 1.2;
  margin: 0 0 14px;
  color: var(--text-primary);
}
.post-head__meta {
  font-family: var(--font-label);
  font-size: 13px;
  color: var(--text-muted);
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  margin: 0 0 12px;
}
.post-head__cats { display: flex; flex-wrap: wrap; gap: 8px; }
.post-cat {
  font-family: var(--font-label);
  font-size: 12px;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 3px 9px;
  background: var(--bg-surface);
}
.post-badge {
  font-family: var(--font-label);
  font-size: 11px;
  color: #fff;
  background: var(--accent-coral);
  border-radius: 3px;
  padding: 2px 7px;
}

/* —— 目录 —— */
.post-toc {
  margin: 0 0 28px;
  padding: 16px 20px;
  background: var(--bg-surface);
  border: 1px solid var(--border-soft);
  border-radius: 6px;
}
.post-toc__label {
  font-family: var(--font-label);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 8px;
}
.post-toc ol { margin: 0; padding-left: 18px; }
.post-toc li { margin: 4px 0; }
.post-toc a { color: var(--text-secondary); text-decoration: none; }
.post-toc a:hover { color: var(--accent-coral); }
.post-toc .lv-3 { list-style: none; margin-left: -14px; font-size: 0.94em; }

/* —— 正文排版 —— */
.post-body { font-size: 18px; line-height: 1.9; color: var(--text-primary); }
.post-body h2 {
  font-family: var(--font-display);
  font-size: 28px; font-weight: 700;
  margin: 44px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-soft);
}
.post-body h3 {
  font-family: var(--font-display);
  font-size: 22px; font-weight: 700;
  margin: 32px 0 10px;
}
.post-body h4 { font-size: 19px; font-weight: 700; margin: 26px 0 8px; }
.post-body p { margin: 0 0 18px; }
.post-body a { color: var(--accent-coral); text-decoration: underline; text-underline-offset: 3px; }
.post-body a:hover { color: var(--text-primary); }
.post-body strong { color: var(--text-primary); font-weight: 700; }
.post-body ul, .post-body ol { margin: 0 0 18px; padding-left: 24px; }
.post-body li { margin: 6px 0; }
.post-body blockquote {
  margin: 22px 0;
  padding: 14px 20px;
  border-left: 3px solid var(--accent-amber);
  background: var(--bg-surface);
  color: var(--text-secondary);
  border-radius: 0 6px 6px 0;
}
.post-body blockquote p:last-child { margin-bottom: 0; }
.post-body code {
  font-family: var(--font-label);
  font-size: 0.86em;
  background: var(--bg-hover);
  padding: 2px 6px; border-radius: 3px;
}
.post-body pre {
  margin: 0 0 18px;
  padding: 16px 18px;
  background: #2a2014; color: #f5ecd7;
  border-radius: 6px; overflow-x: auto;
  font-size: 14px; line-height: 1.6;
}
.post-body pre code { background: none; padding: 0; color: inherit; }
.post-body img { display: block; margin: 22px auto; border-radius: 6px; }
.post-body figure.post-figure { margin: 24px 0; }
.post-body figure.post-figure figcaption {
  font-family: var(--font-label);
  font-size: 12px; color: var(--text-muted);
  text-align: center; margin-top: 8px;
}
.post-body hr { border: none; border-top: 1px solid var(--border-soft); margin: 36px 0; }

.post-table-wrap { overflow-x: auto; margin: 0 0 18px; }
.post-body table { width: 100%; border-collapse: collapse; font-size: 15px; }
.post-body th, .post-body td {
  border: 1px solid var(--border-soft);
  padding: 8px 12px; text-align: left;
}
.post-body th { background: var(--bg-surface); font-family: var(--font-label); font-weight: 600; }

/* —— 页脚 —— */
.post-foot { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border-soft); }
.post-foot__tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 16px; }
.post-foot__tags .wr-tag {
  font-family: var(--font-label); font-size: 12px;
  color: var(--text-secondary);
  border: 1px solid var(--border); border-radius: 3px;
  padding: 3px 9px; background: var(--bg-surface);
}
.post-foot__origin { color: var(--text-muted); font-size: 15px; margin: 0 0 20px; }
.post-foot__origin a { color: var(--accent-coral); }
.post-nav { display: flex; justify-content: space-between; gap: 16px; margin-top: 20px; }
.post-nav a {
  flex: 1; text-decoration: none;
  padding: 14px 16px;
  border: 1px solid var(--border-soft); border-radius: 6px;
  background: var(--bg-surface);
}
.post-nav a:hover { border-color: var(--accent-amber); }
.post-nav small { display: block; font-family: var(--font-label); font-size: 11px; color: var(--text-muted); margin-bottom: 4px; }
.post-nav span { color: var(--text-primary); font-size: 15px; }
.post-nav .is-empty { visibility: hidden; }

/* —— 文末 CTA —— */
.post-cta {
  margin-top: 32px; padding: 22px 24px;
  background: var(--bg-surface);
  border: 1px solid var(--border); border-radius: 8px;
  text-align: center;
}
.post-cta p { margin: 0 0 10px; color: var(--text-secondary); }
.post-cta a {
  display: inline-block; font-family: var(--font-label); font-size: 14px;
  color: #fff; background: var(--accent-coral);
  padding: 10px 20px; border-radius: 4px; text-decoration: none;
}
.post-cta a:hover { background: var(--text-primary); }

@media (max-width: 600px) {
  body { font-size: 17px; }
  .post-wrap { padding: 32px 18px 72px; }
  .post-body { font-size: 17px; }
}