*{box-sizing:border-box;margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'PingFang SC','Microsoft YaHei',sans-serif;background:#f5f5f5;display:flex;flex-direction:column;min-height:100vh}
.topbar{background:#2a5fc4;color:#fff;padding:10px 16px;display:flex;align-items:center;gap:10px;flex-shrink:0;position:sticky;top:0;z-index:40}
.topbar a{color:rgba(255,255,255,.85);text-decoration:none;font-size:14px;display:inline-flex;align-items:center;gap:4px}
.topbar a:hover{color:#fff}
.topbar .sep{color:rgba(255,255,255,.4)}
.topbar .filename{font-weight:700;font-size:15px;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.btn-dl{background:rgba(255,255,255,.2);border:1px solid rgba(255,255,255,.45);color:#fff!important;padding:5px 12px;border-radius:5px;font-size:13px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;gap:4px;flex-shrink:0}
.btn-dl:hover{background:rgba(255,255,255,.35)}
.btn-icon{width:34px;padding:5px;justify-content:center}
.btn-danger{color:#ffaaaa!important;border-color:rgba(255,100,100,.5)}
.layout{display:flex;flex:1;max-width:1180px;margin:0 auto;width:100%;gap:0}
#tocSidebar{width:220px;background:#fff;border-right:1px solid #e2e8f0;overflow-y:auto;padding:22px 12px;flex-shrink:0;position:sticky;top:53px;height:calc(100vh - 53px)}
#tocSidebar h3{font-size:12px;text-transform:uppercase;color:#aaa;letter-spacing:.8px;margin-bottom:10px}
#tocList{list-style:none}
#tocList li a{display:block;padding:3px 6px;border-radius:4px;font-size:13px;color:#555;text-decoration:none;line-height:1.5}
#tocList li a:hover{background:#eff6ff;color:#2a5fc4}
#tocList li a.active{background:#eff6ff;color:#2a5fc4;font-weight:600}
.toc-h3{padding-left:18px!important}
#contentArea{flex:1;min-width:0;padding:32px 32px 60px}
.post-title{margin:4px 4px 10px;text-align:center;font-size:26px;line-height:1.4;color:#2a5fc4;word-break:break-word}
.post-meta{font-size:12.5px;color:#999;margin:0 4px 20px;display:flex;gap:8px;align-items:center;justify-content:center;flex-wrap:wrap}
.post-meta a{color:#2a5fc4}
.tag{background:#fff4e5;color:#c77700;padding:0 6px;border-radius:4px}
#mdBody{background:#fff;padding:32px;border-radius:8px;box-shadow:0 1px 4px rgba(0,0,0,.08);min-height:200px;line-height:1.75;color:#333;word-break:break-word}
#mdBody pre{background:#f6f8fa;border:1px solid #e1e4e8;border-radius:6px;padding:16px;overflow-x:auto;font-size:13.5px;line-height:1.7;margin:16px 0;position:relative}
#mdBody code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9em;background:#f6f8fa;padding:2px 5px;border-radius:3px}
#mdBody pre code{background:none;padding:0}
#mdBody h1,#mdBody h2,#mdBody h3,#mdBody h4,#mdBody h5{margin:26px 0 12px;color:#2a5fc4;scroll-margin-top:70px}
#mdBody>:first-child{margin-top:0}
#mdBody h2{border-bottom:1px solid #eee;padding-bottom:6px}
#mdBody p{margin:0 0 13px}
#mdBody ul,#mdBody ol{margin:0 0 13px 24px}
#mdBody li{margin:3px 0}
#mdBody blockquote{border-left:4px solid #2a5fc4;margin:0 0 13px;padding:8px 16px;background:#eff6ff;border-radius:0 4px 4px 0;color:#555}
#mdBody table{border-collapse:collapse;width:100%;margin:16px 0;display:block;overflow-x:auto}
#mdBody th,#mdBody td{border:1px solid #ddd;padding:8px 12px}
#mdBody th{background:#f8f9fa}
#mdBody a{color:#2a5fc4}
#mdBody hr{border:none;border-top:1px solid #ddd;margin:22px 0}
#mdBody img{max-width:100%;border-radius:4px;cursor:zoom-in;height:auto}
#mdBody .h-anchor{float:left;margin-left:-1em;padding-right:.3em;color:#c8d3e8;opacity:0;text-decoration:none;font-weight:400}
#mdBody .h-anchor::before{content:"#"}
#mdBody h1:hover .h-anchor,#mdBody h2:hover .h-anchor,#mdBody h3:hover .h-anchor{opacity:1}
.back-top{display:flex;align-items:center;justify-content:center;width:44px;height:44px;margin:-22px auto 0;border-radius:50%;border:1px solid #e1e4e8;background:#fff;color:#2a5fc4;cursor:pointer;box-shadow:0 1px 4px rgba(0,0,0,.1);transition:background .15s,color .15s,border-color .15s,transform .15s}
.back-top:hover{background:#2a5fc4;border-color:#2a5fc4;color:#fff;transform:translateY(-2px)}
.back-top svg{width:20px;height:20px}
.copy-code-btn{position:absolute;top:8px;right:8px;padding:3px 10px;font-size:12px;border:1px solid #d0d7de;border-radius:4px;background:rgba(246,248,250,.9);color:#57606a;cursor:pointer;opacity:0;transition:opacity .15s;line-height:1.6;font-family:sans-serif}
#mdBody pre:hover .copy-code-btn{opacity:1}
.copy-code-btn:hover{background:#eaf0fb;border-color:#2a5fc4;color:#2a5fc4}
.copy-code-btn.copied{background:#e6ffed;border-color:#52c41a;color:#389e0d;opacity:1}
.toc-toggle{display:none}
#imgViewer{display:none;position:fixed;inset:0;background:rgba(0,0,0,.85);z-index:300;align-items:center;justify-content:center;cursor:zoom-out;padding:20px}
#imgViewer.open{display:flex}
#imgViewer img{max-width:100%;max-height:100%;box-shadow:0 8px 40px rgba(0,0,0,.5)}
.float-back{display:none}
.footer{text-align:center;font-size:12.5px;color:#8a93a3;padding:24px 16px 32px}
.footer a{color:#2a5fc4}
@media(max-width:900px){
  #tocSidebar{position:fixed;top:0;bottom:0;left:0;z-index:100;transform:translateX(-100%);transition:transform .25s;height:auto;padding-top:64px;box-shadow:2px 0 8px rgba(0,0,0,.15)}
  #tocSidebar.open{transform:translateX(0)}
  .toc-toggle{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:6px;border:1px solid rgba(255,255,255,.45);background:rgba(255,255,255,.18);cursor:pointer;flex-shrink:0;color:#fff}
  #contentArea{padding:16px 16px 40px}
  #mdBody{padding:18px}
  .post-title{font-size:21px}
  .topbar .sep{display:none}
  .copy-code-btn{opacity:1}
  #btnDownload{display:none}
}
@media (prefers-color-scheme:dark){
  body{background:#14171c}
  #mdBody{background:#1c2027;color:#d6dae2;box-shadow:none;border:1px solid #2a3038}
  #mdBody h1,#mdBody h2,#mdBody h3,#mdBody h4,#mdBody h5{color:#8ab4ff}
  #mdBody h2{border-color:#2a3038}
  #mdBody pre{background:#11141a;border-color:#2a3038}
  #mdBody code{background:#11141a;color:#e2e6ee}
  #mdBody blockquote{background:#1a2433;color:#b9c2d0}
  #mdBody th{background:#222833}
  #mdBody th,#mdBody td{border-color:#333b47}
  #tocSidebar{background:#171b21;border-color:#262c35}
  #tocSidebar h3{color:#6b7484}
  #tocList li a{color:#a9b2c0}
  #tocList li a:hover,#tocList li a.active{background:#1e2838;color:#8ab4ff}
  .back-top{background:#1c2027;border-color:#333b47;color:#8ab4ff}
}