/* 老三聊底盘 · 站点样式（移动端优先，AI/搜索引擎友好） */
:root {
  --bg: #ffffff;
  --text: #1f2328;
  --muted: #6b7280;
  --accent: #b45309;
  --accent-soft: #fef3c7;
  --border: #e5e7eb;
  --code-bg: #f6f8fa;
  --maxw: 760px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== 页头 ===== */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 22px 0;
  margin-bottom: 36px;
}
.site-header .wrap {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.site-title {
  font-size: 21px;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.2px;
}
.site-title a { color: var(--text); text-decoration: none; }
.site-desc {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

/* ===== 首页文章列表 ===== */
.post-list { list-style: none; padding: 0; margin: 0; }
.post-item {
  padding: 22px 0;
  border-bottom: 1px solid var(--border);
}
.post-item h2 {
  font-size: 20px;
  margin: 0 0 8px;
  line-height: 1.45;
}
.post-item h2 a { color: var(--text); text-decoration: none; }
.post-item h2 a:hover { color: var(--accent); }
.post-meta {
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 8px;
}
.post-excerpt {
  margin: 0;
  color: #374151;
  font-size: 15px;
}
.tags { margin-top: 10px; display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  background: var(--accent-soft);
  color: #92400e;
  font-size: 12px;
  padding: 2px 9px;
  border-radius: 11px;
}

/* ===== 文章正文 ===== */
.article-header { margin-bottom: 30px; }
.article-title {
  font-size: 27px;
  line-height: 1.4;
  margin: 0 0 12px;
  letter-spacing: -0.3px;
}
.article-meta {
  color: var(--muted);
  font-size: 14px;
}

.article-content h2 {
  font-size: 21px;
  margin: 38px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.article-content h3 {
  font-size: 18px;
  margin: 28px 0 10px;
  color: #111827;
}
.article-content p { margin: 0 0 16px; }
.article-content ul,
.article-content ol { margin: 0 0 16px; padding-left: 24px; }
.article-content li { margin-bottom: 7px; }
.article-content strong { color: #111827; }

.article-content blockquote {
  margin: 18px 0;
  padding: 12px 18px;
  background: var(--code-bg);
  border-left: 4px solid var(--accent);
  color: #374151;
  font-size: 15.5px;
}
.article-content blockquote p:last-child { margin-bottom: 0; }

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0;
  font-size: 15px;
  display: block;
  overflow-x: auto;
}
.article-content th,
.article-content td {
  border: 1px solid var(--border);
  padding: 9px 12px;
  text-align: left;
}
.article-content th { background: var(--code-bg); font-weight: 600; }

.article-content code {
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
}
.article-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 34px 0;
}
.article-content em { color: var(--muted); }

.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
}

/* ===== 页脚 ===== */
.site-footer {
  margin-top: 56px;
  padding: 26px 0 40px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13.5px;
}
.site-footer a { color: var(--accent); }

.back-link {
  display: inline-block;
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
}
.back-link:hover { color: var(--accent); }

@media (max-width: 600px) {
  body { font-size: 16px; }
  .article-title { font-size: 23px; }
  .article-content h2 { font-size: 19px; }
}