/* PS 学习笔记 —— 自用样式表，无外部依赖 */
:root{
  --bg:#faf9f7;
  --fg:#2b2b2b;
  --muted:#8a8a8a;
  --accent:#2f6db0;
  --accent-dark:#214e7f;
  --line:#e7e3dd;
  --card:#ffffff;
  --code-bg:#f3f1ec;
  --max:760px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  color:var(--fg);
  background:var(--bg);
  line-height:1.75;
  font-size:16px;
}
a{color:var(--accent);text-decoration:none}
a:hover{color:var(--accent-dark);text-decoration:underline}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
header.site{
  border-bottom:1px solid var(--line);
  background:var(--card);
}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;padding-top:18px;padding-bottom:18px}
.brand{display:flex;align-items:center;gap:12px}
.brand .logo{
  width:40px;height:40px;border-radius:9px;
  background:linear-gradient(135deg,#2f6db0,#1f3f66);
  color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;
  font-size:18px;letter-spacing:1px;
}
.brand .title{font-size:19px;font-weight:700;color:var(--fg)}
.brand .title span{display:block;font-size:12px;font-weight:400;color:var(--muted);letter-spacing:.5px}
nav.main a{margin-left:18px;color:var(--fg);font-size:15px}
nav.main a:hover{color:var(--accent)}
main{padding:34px 0 10px}
.hero{margin-bottom:30px}
.hero h1{font-size:26px;margin:0 0 10px}
.hero p{color:var(--muted);margin:0;font-size:15px}
.post-list{list-style:none;padding:0;margin:0}
.post-list li{
  border-bottom:1px solid var(--line);
  padding:20px 0;
}
.post-list li:last-child{border-bottom:none}
.post-list h2{font-size:19px;margin:0 0 6px}
.post-list .meta{color:var(--muted);font-size:13px;margin-bottom:8px}
.post-list .excerpt{color:#555;font-size:15px;margin:0}
.tag{display:inline-block;background:var(--code-bg);color:#6b6b6b;font-size:12px;padding:1px 8px;border-radius:10px;margin-left:6px}
article.post{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:30px 34px;margin-bottom:24px}
article.post h1{font-size:25px;margin:0 0 8px}
article.post .meta{color:var(--muted);font-size:13px;margin-bottom:22px;border-bottom:1px solid var(--line);padding-bottom:16px}
article.post h2{font-size:19px;margin:28px 0 10px;padding-left:10px;border-left:3px solid var(--accent)}
article.post h3{font-size:16px;margin:20px 0 8px}
article.post p{margin:12px 0}
article.post ul,article.post ol{padding-left:22px}
article.post li{margin:6px 0}
article.post img{max-width:100%}
kbd{
  display:inline-block;background:#fff;border:1px solid #cfcabf;border-bottom-width:2px;
  border-radius:5px;padding:1px 7px;font-size:13px;font-family:"SF Mono",Consolas,Menlo,monospace;
  color:#333;margin:0 1px;
}
code{background:var(--code-bg);padding:2px 6px;border-radius:4px;font-size:14px;font-family:"SF Mono",Consolas,Menlo,monospace}
.tip{background:#eef5fc;border-left:4px solid var(--accent);padding:12px 16px;border-radius:6px;margin:16px 0;font-size:15px}
.note{background:#fdf6e9;border-left:4px solid #d8a94b;padding:12px 16px;border-radius:6px;margin:16px 0;font-size:15px}
table{border-collapse:collapse;width:100%;margin:16px 0;font-size:14px}
table th,table td{border:1px solid var(--line);padding:8px 12px;text-align:left}
table th{background:var(--code-bg)}
.backlink{display:inline-block;margin:10px 0 0;font-size:14px}
footer.site{border-top:1px solid var(--line);margin-top:40px;background:var(--card)}
footer.site .wrap{padding:24px 20px;color:var(--muted);font-size:13px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
footer.site a{color:var(--muted)}
@media(max-width:600px){
  article.post{padding:22px 18px}
  nav.main a{margin-left:12px}
  .hero h1{font-size:22px}
}