/* 密聊 · SEO 文章站共用样式（纯静态、无外部依赖，保证首屏速度与可抓取性） */
:root{
  --bg:#070a16;
  --bg2:#0d1130;
  --card:rgba(18,23,52,.72);
  --line:rgba(106,58,255,.25);
  --text:#e8ecff;
  --muted:#8b97c9;
  --brand:#6a3aff;
  --brand2:#00d4ff;
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:radial-gradient(1100px 560px at 50% -10%,#1a1150 0%,transparent 60%),linear-gradient(180deg,var(--bg) 0%,var(--bg2) 100%);
  background-attachment:fixed;
  color:var(--text);line-height:1.85;font-size:16px;
}
a{color:#8fb4ff;text-decoration:none}
a:hover{text-decoration:underline}

/* 顶部导航 */
.site-header{position:sticky;top:0;z-index:20;background:rgba(8,10,24,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.site-header .inner{max-width:860px;margin:0 auto;padding:12px 18px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;color:#fff;font-size:16px}
.brand .dot{width:22px;height:22px;border-radius:7px;background:linear-gradient(135deg,var(--brand),var(--brand2));display:inline-block}
.nav a{color:var(--muted);font-size:14px;margin-left:14px}
.nav a:hover{color:#fff}

/* 主体 */
.wrap{max-width:860px;margin:0 auto;padding:26px 18px 70px}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:14px}
.crumbs a{color:var(--muted)}

article{
  background:var(--card);border:1px solid var(--line);border-radius:16px;
  padding:30px 28px 34px;backdrop-filter:blur(6px);
}
h1{font-size:26px;line-height:1.5;margin-bottom:12px;color:#fff}
h2{font-size:20px;margin:32px 0 10px;color:#fff;padding-left:12px;border-left:4px solid var(--brand);line-height:1.5}
h3{font-size:17px;margin:22px 0 8px;color:#dfe6ff}
p{margin:12px 0}
ul,ol{margin:12px 0 12px 22px}
li{margin:7px 0}
strong{color:#fff}
em{color:#c9d3ff;font-style:normal;background:rgba(0,212,255,.12);padding:1px 5px;border-radius:4px}
blockquote{border-left:3px solid var(--brand2);background:rgba(0,212,255,.07);padding:10px 16px;border-radius:0 10px 10px 0;color:#cdd6ff;margin:16px 0}
code{background:rgba(255,255,255,.08);padding:2px 6px;border-radius:5px;font-size:14px}
hr{border:0;border-top:1px solid var(--line);margin:26px 0}
.meta{color:var(--muted);font-size:13px;margin-bottom:16px}
.lead{font-size:17px;color:#cfd7ff}

/* 目录 */
.toc{background:rgba(106,58,255,.10);border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin:20px 0}
.toc-title{font-weight:700;color:#fff;margin-bottom:6px;font-size:15px}
.toc ol{margin:0 0 0 20px}
.toc li{margin:4px 0;font-size:14px}

/* 表格 */
table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}
th,td{border:1px solid var(--line);padding:9px 11px;text-align:left}
th{background:rgba(106,58,255,.16);color:#fff}
td{color:#d5ddff}

/* 提示块 */
.note{border-left:3px solid #ffb347;background:rgba(255,179,71,.08);padding:10px 16px;border-radius:0 10px 10px 0;margin:16px 0;color:#ffe0b0}

/* CTA */
.cta{
  margin:30px 0 6px;padding:22px 22px 24px;border-radius:16px;text-align:center;
  background:linear-gradient(135deg,rgba(106,58,255,.30),rgba(0,212,255,.20));
  border:1px solid rgba(140,110,255,.4);
}
.cta-title{font-size:19px;font-weight:700;color:#fff;margin-bottom:6px}
.cta p{color:#dbe3ff;font-size:14px;margin:6px 0 14px}
.cta-btn{
  display:inline-block;background:linear-gradient(135deg,var(--brand),var(--brand2));
  color:#fff;font-weight:700;padding:12px 30px;border-radius:999px;
}
.cta-btn:hover{text-decoration:none;filter:brightness(1.08)}

/* 相关文章 */
.related{margin-top:30px;padding-top:20px;border-top:1px solid var(--line)}
.related-title{font-weight:700;color:#fff;margin-bottom:10px}
.related ul{margin-left:20px}

/* 文章列表（聚合页） */
.post-list{list-style:none;margin:0}
.post-list li{
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  padding:18px 20px;margin:14px 0;transition:border-color .2s,transform .2s;
}
.post-list li:hover{border-color:rgba(140,110,255,.6);transform:translateY(-2px)}
.post-list h3{margin:0 0 6px;font-size:17px}
.post-list h3 a{color:#fff}
.post-list p{color:var(--muted);font-size:14px;margin:0}

/* 页脚 */
.site-footer{border-top:1px solid var(--line);margin-top:40px;padding:22px 18px;text-align:center;color:var(--muted);font-size:13px}
.site-footer a{color:#8fb4ff}

@media (max-width:640px){
  body{font-size:15.5px}
  .wrap{padding:18px 14px 60px}
  article{padding:22px 16px 26px;border-radius:14px}
  h1{font-size:22px}
  h2{font-size:18px}
  .nav a{margin-left:10px;font-size:13px}
}