/* Shared blog post stylesheet for chenrumeng.cn/blog/* */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --bg: #000; --bg2: #0a0a0a; --card: #111; --card-h: #1a1a1a;
  --t1: #f5f5f7; --t2: #a1a1a6; --t3: #6e6e73;
  --ac: #6c5ce7; --ac2: #a29bfe;
  --grad: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 50%, #74b9ff 100%);
  --bd: rgba(255,255,255,0.08);
}
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg); color: var(--t1); line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
.container { max-width: 780px; margin: 0 auto; padding: 0 24px; }
.tg { background: var(--grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* Nav */
.nav { position: sticky; top: 0; background: rgba(0,0,0,.72); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px); border-bottom: 1px solid var(--bd); z-index: 10; }
.nav-in { max-width: 1200px; margin: 0 auto; height: 64px; display: flex; align-items: center; justify-content: space-between; padding: 0 24px; }
.nav-logo { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--t1); }
.nav-logo img { height: 40px; width: auto; }
.nav-logo span { font-size: 18px; font-weight: 600; }
.nav-links { display: flex; gap: 28px; align-items: center; }
.nav-links a { color: var(--t2); text-decoration: none; font-size: 14px; font-weight: 500; transition: color .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--t1); }
.nav-cta { display: inline-flex; align-items: center; padding: 8px 20px; background: var(--ac); color: #fff !important; border-radius: 980px; font-size: 14px; font-weight: 500; text-decoration: none; }

/* Breadcrumb */
.crumb { color: var(--t3); font-size: 13px; padding: 24px 0 0; }
.crumb a { color: var(--t2); text-decoration: none; }
.crumb a:hover { color: var(--t1); }

/* Article */
article { padding: 40px 0 80px; }
.post-meta { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; color: var(--t3); font-size: 13px; margin-bottom: 18px; }
.post-tag { display: inline-block; padding: 3px 10px; border-radius: 980px; background: rgba(108,92,231,.15); color: var(--ac2); font-size: 12px; font-weight: 500; }
article h1 { font-size: clamp(30px,4.5vw,44px); font-weight: 700; letter-spacing: -0.02em; line-height: 1.2; margin-bottom: 16px; }
article .lead { font-size: 17px; color: var(--t2); margin-bottom: 32px; line-height: 1.8; }
article h2 { font-size: 26px; font-weight: 600; margin: 48px 0 16px; letter-spacing: -0.01em; border-left: 4px solid var(--ac); padding-left: 14px; }
article h3 { font-size: 19px; font-weight: 600; margin: 28px 0 12px; color: var(--t1); }
article p { color: var(--t2); font-size: 16px; margin-bottom: 16px; line-height: 1.85; }
article p strong, article li strong { color: var(--t1); font-weight: 600; }
article a { color: var(--ac2); text-decoration: none; }
article a:hover { text-decoration: underline; }
article ul, article ol { color: var(--t2); padding-left: 24px; margin-bottom: 18px; }
article li { margin-bottom: 8px; line-height: 1.85; }

/* Call-out boxes */
.note { background: var(--card); border: 1px solid var(--bd); border-left: 4px solid var(--ac); padding: 16px 20px; border-radius: 10px; margin: 24px 0; font-size: 15px; color: var(--t2); }
.warn { background: rgba(225,112,85,.06); border: 1px solid rgba(225,112,85,.2); border-left: 4px solid #e17055; padding: 16px 20px; border-radius: 10px; margin: 24px 0; font-size: 15px; color: #e2cdbf; }

/* Tables */
.tbl-wrap { overflow-x: auto; margin: 20px 0; }
article table { width: 100%; border-collapse: collapse; font-size: 14px; background: var(--card); border-radius: 10px; overflow: hidden; }
article th, article td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--bd); color: var(--t2); }
article th { background: var(--card-h); color: var(--t1); font-weight: 600; font-size: 13px; }

/* Step blocks (HowTo visualization) */
.step { background: var(--card); border: 1px solid var(--bd); border-radius: 14px; padding: 24px 26px; margin: 18px 0; }
.step h3 { margin: 0 0 10px; font-size: 18px; color: var(--t1); display: flex; align-items: center; gap: 12px; }
.step-num { display: inline-flex; width: 30px; height: 30px; background: var(--grad); color: #fff; border-radius: 50%; align-items: center; justify-content: center; font-size: 15px; font-weight: 700; flex-shrink: 0; }
.step p, .step li { color: var(--t2); font-size: 15px; }

/* TOC */
.toc { background: var(--bg2); border: 1px solid var(--bd); border-radius: 12px; padding: 18px 22px; margin: 20px 0 32px; font-size: 14px; }
.toc-title { color: var(--t3); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 10px; font-weight: 600; }
.toc ol { color: var(--t2); padding-left: 20px; margin-bottom: 0; }
.toc ol li { margin-bottom: 4px; }
.toc a { color: var(--t2); text-decoration: none; }
.toc a:hover { color: var(--ac2); }

/* CTA */
.cta { text-align: center; padding: 40px 24px; background: linear-gradient(135deg, rgba(108,92,231,.08), rgba(116,185,255,.05)); border: 1px solid var(--bd); border-radius: 18px; margin: 48px 0 0; }
.cta h3 { font-size: 22px; margin-bottom: 10px; border: none; padding: 0; }
.cta p { color: var(--t2); margin-bottom: 22px; }
.cta .btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; background: var(--grad); color: #fff; border-radius: 14px; font-size: 15px; font-weight: 600; text-decoration: none; }
.cta .btn.sec { background: transparent; border: 1px solid var(--bd); color: var(--t1); margin-left: 10px; }

/* Related */
.related { margin-top: 48px; }
.related h3 { font-size: 18px; margin-bottom: 14px; color: var(--t1); }
.related-card { display: block; background: var(--card); border: 1px solid var(--bd); border-radius: 12px; padding: 18px 22px; margin-bottom: 10px; text-decoration: none; color: var(--t1); transition: all .2s; }
.related-card:hover { border-color: rgba(108,92,231,.3); background: var(--card-h); }
.related-card strong { display: block; margin-bottom: 4px; font-size: 15px; }
.related-card span { color: var(--t2); font-size: 13px; }

/* Footer */
footer { border-top: 1px solid var(--bd); padding: 40px 24px; text-align: center; color: var(--t3); font-size: 13px; }
footer a { color: var(--t2); text-decoration: none; margin: 0 8px; }
footer a:hover { color: var(--t1); }

@media (max-width:640px) {
  .nav-links { display: none; }
  article h1 { font-size: 26px; }
  article h2 { font-size: 20px; }
  article p, article li { font-size: 15px; }
}