/* 拓展阅读文章 — 共享样式（由 Nginx 静态提供，路径 /docs/article.css） */
:root {
  --brand: #ff744f;
  --ink: #1f2430;
  --soft: #5b6472;
  --muted: #9aa3b2;
  --line: #e8eaf0;
  --bg: #f3f5f9;
  --blue: #355cc9;
  --code-bg: #f3f6fb;
  --mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
  --font: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body { font-family: var(--font); color: var(--ink); background: var(--bg); line-height: 1.85; }

/* 顶部条 */
.top { background: linear-gradient(180deg, #4450a0, #3c4791); padding: 14px 20px; position: sticky; top: 0; z-index: 10; }
.top-inner { max-width: 1080px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.top a { text-decoration: none; }
.top .brand { display: inline-flex; align-items: center; }
.top .brand svg { height: 28px; width: auto; display: block; }
.top .back { color: rgba(255,255,255,.82); font-size: 13px; }
.top .back:hover { color: #fff; }

/* 文章主体 */
article {
  width: min(1080px, 100% - 40px);
  margin: 28px auto 48px;
  padding: 40px 44px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 6px 24px rgba(26, 39, 94, 0.05);
}
.art-head { border-bottom: 1px solid var(--line); padding-bottom: 22px; margin-bottom: 28px; }
.art-head h1 { font-size: 30px; font-weight: 800; line-height: 1.32; }
.art-meta { margin-top: 12px; font-size: 13px; color: var(--muted); }

.lead {
  font-size: 16px; color: var(--soft); background: #fff;
  border: 1px solid var(--line); border-left: 3px solid var(--brand);
  border-radius: 10px; padding: 15px 18px; margin-bottom: 28px; line-height: 1.8;
}

article h2 { font-size: 21px; font-weight: 800; margin: 36px 0 14px; padding-left: 11px; border-left: 4px solid var(--brand); }
article h3 { font-size: 17px; font-weight: 700; margin: 26px 0 10px; }
article p { margin: 13px 0; color: #33384a; }
article ul, article ol { margin: 12px 0 12px 24px; color: #33384a; }
article li { margin: 8px 0; }
article strong { color: var(--ink); font-weight: 700; }

article code {
  font-family: var(--mono); font-size: 13px; background: var(--code-bg);
  border: 1px solid #e2e8f3; border-radius: 6px; padding: 2px 6px; color: #355cc9; word-break: break-all;
}
article pre {
  background: #0d1117; color: #e6edf3; border-radius: 10px;
  padding: 16px 18px; overflow: auto; margin: 18px 0; font-size: 13px; line-height: 1.7;
}
article pre code { background: none; border: none; color: inherit; padding: 0; word-break: normal; }

article a { color: var(--blue); text-decoration: none; border-bottom: 1px solid rgba(53,92,201,.3); }
article a:hover { border-bottom-color: var(--blue); }

table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 14px; }
th, td { border: 1px solid var(--line); padding: 9px 12px; text-align: left; vertical-align: top; }
th { background: #f0f2f7; font-weight: 700; }

.note { background: #fffbeb; border: 1px solid #fde68a; border-radius: 10px; padding: 13px 16px; margin: 18px 0; font-size: 14px; color: #8a5a00; line-height: 1.75; }
.tip  { background: #e7f6ec; border: 1px solid #b7e4c7; border-radius: 10px; padding: 13px 16px; margin: 18px 0; font-size: 14px; color: #1f6f43; line-height: 1.75; }

/* 相关阅读 */
.related { margin-top: 46px; border-top: 1px solid var(--line); padding-top: 26px; }
.related h2 { font-size: 18px; margin-bottom: 14px; padding: 0; border: none; }
.related-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 28px; }
.related-grid a { font-size: 15px; font-weight: 600; color: var(--ink); border: none; padding: 7px 0; }
.related-grid a:hover { color: var(--brand); }

.foot { background: #0d1117; color: rgba(255,255,255,.45); text-align: center; padding: 24px 20px; font-size: 12px; }

@media (max-width: 640px) {
  article { padding: 24px 20px; }
  .art-head h1 { font-size: 24px; }
  .related-grid { grid-template-columns: 1fr; }
}