:root{--bg:#fff;--fg:#1d2330;--muted:#5f6b7a;--line:#e6e9ef;--soft:#f5f7fa;--accent:#1f5fd6;--accent-ink:#fff}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;overflow-wrap:break-word}
.wrap{max-width:720px;margin:0 auto;padding:0 16px}
a{color:var(--accent);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:2px}
a:hover{text-decoration-thickness:2px}
.top{border-bottom:1px solid var(--line)}
.top .wrap{padding-top:14px;padding-bottom:14px}
.brand{font-weight:700;color:var(--fg);text-decoration:none;font-size:16px}
.back{margin:20px 0 4px;font-size:15px}
.back a{text-decoration:none}
.back.bottom{margin:28px 0 40px}
h1{font-size:30px;line-height:1.25;margin:12px 0 20px;letter-spacing:-.01em}
.post h2{font-size:23px;line-height:1.3;margin:32px 0 12px}
.post h3{font-size:19px;line-height:1.35;margin:26px 0 10px}
.post h4{font-size:17px;margin:22px 0 8px}
.post p{margin:0 0 14px}
.post ul,.post ol{margin:0 0 16px;padding-left:24px}
.post li{margin:4px 0}
.post li p{margin:0 0 6px}
.post figure{margin:20px 0}
.post img{display:block;max-width:100%;height:auto;margin:0 auto;border-radius:8px}
.post blockquote{margin:16px 0;padding:4px 16px;border-left:3px solid var(--line);color:var(--muted)}
.post hr{border:0;border-top:1px solid var(--line);margin:28px 0}
.post .table{overflow-x:auto;margin:16px 0}
.post table{border-collapse:collapse;width:100%;font-size:15px}
.post td,.post th{border:1px solid var(--line);padding:6px 10px;vertical-align:top;text-align:left}
.post pre{white-space:pre-wrap;background:var(--soft);padding:12px;border-radius:8px;font-size:14px}
.video{position:relative;width:100%;aspect-ratio:16/9;margin:20px 0;background:#000;border-radius:8px;overflow:hidden}
.video iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
@supports not (aspect-ratio:16/9){.video{height:0;padding-bottom:56.25%}}
.post .note{margin:20px 0;padding:14px 16px;border:1px dashed var(--line);border-radius:8px;color:var(--muted);font-size:15px}
.next{margin:36px 0 0;padding:20px;border:1px solid var(--line);border-radius:12px;background:var(--soft)}
.next p{margin:0 0 12px;color:var(--muted)}
.next .next-title{font-weight:700;color:var(--fg);font-size:18px;margin-bottom:6px}
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);text-decoration:none;padding:10px 18px;border-radius:8px;font-weight:600}
.btn:hover{opacity:.92}
.list{list-style:none;margin:0;padding:0}
.list li{border-bottom:1px solid var(--line)}
.list a{display:block;padding:14px 0;text-decoration:none;color:var(--fg)}
.list a:hover .t{color:var(--accent)}
.list .t{display:block;font-weight:600;font-size:18px;line-height:1.35}
.list .d{display:block;color:var(--muted);font-size:15px;line-height:1.5;margin-top:4px}
.foot{border-top:1px solid var(--line);margin-top:40px;color:var(--muted);font-size:14px}
.foot .wrap{padding-top:18px;padding-bottom:28px}
@media (max-width:600px){body{font-size:16px}h1{font-size:25px}.post h2{font-size:21px}.next{padding:16px}}