:root{--bg:#f5f7fb;--panel:#fff;--ink:#182236;--muted:#526178;--line:#dce3ed;--link:#315cae;--wash:#f3f6fc}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.7 system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif}a{color:var(--link);text-decoration:none}a:focus-visible{outline:3px solid #8b5cf6;outline-offset:5px;border-radius:4px}a:hover{color:#7c3aed}main{width:min(1040px,calc(100% - 40px));margin:0 auto;padding:26px 0 42px}nav{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:24px}nav .brand{font-weight:750;letter-spacing:-.4px;color:var(--ink)}nav .links{display:flex;gap:22px;font-size:14px}.hero{position:relative;padding:38px 42px;background:#101827;border:1px solid #25334a;border-radius:16px;color:#f8fafc;overflow:hidden}.hero:before{content:"";position:absolute;left:0;top:30px;bottom:30px;width:4px;background:linear-gradient(#8b5cf6,#2dd4bf)}.hero .eyebrow{color:#c4b5fd}.hero h1{font-size:clamp(29px,4vw,43px);line-height:1.2;letter-spacing:-1px;margin:15px 0}.hero h1 span{color:#2dd4bf}.hero p{max-width:720px;color:#cbd5e1;margin:14px 0 22px}.tags{display:flex;flex-wrap:wrap;gap:9px}.tags span{font-size:12px;letter-spacing:.3px;padding:4px 11px;background:#202d43;border-radius:5px;color:#e2e8f0}.intro{display:flex;justify-content:space-between;gap:24px;margin:26px 2px 19px;align-items:center}.intro h2{font-size:20px;margin:0}.intro p{margin:0;font-size:13px;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.tile{padding:25px 26px 18px;background:var(--panel);border:1px solid var(--line);border-radius:12px;box-shadow:0 5px 16px #10182705}.eyebrow{font-size:10px;letter-spacing:1.7px;color:#7c3aed;font-weight:700}.t1 .eyebrow{color:#a16207}.t2 .eyebrow{color:#0d9488}.t3 .eyebrow{color:#be185d}.tile h2{font-size:20px;margin:9px 0 9px}.tile p{font-size:14px;color:var(--muted);margin:0 0 16px}.tile ul{list-style:none;padding:0;margin:0}.tile li{border-top:1px solid var(--line)}.tile li a{position:relative;display:block;padding:13px 26px 13px 0}.tile strong{font-size:14px;display:block}.tile li span{display:block;font-size:12px;color:var(--muted)}.tile li b{position:absolute;right:1px;top:19px;color:#8b5cf6}.continuity{border:1px dashed var(--line);border-radius:10px;padding:18px 23px;margin-top:22px;font-size:14px;color:var(--muted)}.continuity strong{color:var(--ink)}footer{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:28px;font-size:12px;color:var(--muted)}@media(max-width:650px){main{width:calc(100% - 28px);padding-top:18px}.grid{grid-template-columns:1fr;gap:14px}.hero{padding:28px 24px}.intro{display:block}.intro p{margin-top:7px}.tile{padding:21px 22px 15px}nav .links{gap:16px}}@media(prefers-color-scheme:dark){:root{--bg:#0d1420;--panel:#151f2e;--ink:#e5edf8;--muted:#a5b3c7;--line:#2c3b51;--link:#93b8ff;--wash:#182437}.t1 .eyebrow{color:#fcd34d}.t2 .eyebrow{color:#5eead4}.t3 .eyebrow{color:#f9a8d4}.eyebrow{color:#c4b5fd}}

nav .links{flex-wrap:wrap}nav a{white-space:nowrap}.skip-link{position:absolute;left:18px;top:-80px;z-index:100;background:var(--panel);padding:10px 16px;border:2px solid var(--link)}.skip-link:focus{top:12px}nav [aria-current=page]{font-weight:750}html{scroll-padding-top:18px}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation-duration:.01ms!important;transition-duration:.01ms!important}}

.notebook-search{margin-top:20px;padding:14px 20px;border:1px solid var(--line);border-radius:10px;background:var(--panel)}.notebook-search summary{cursor:pointer;font-weight:650;font-size:15px}.notebook-search summary span{font-weight:400;color:var(--muted);font-size:12px;margin-left:10px}.notebook-search form{margin-top:15px}.notebook-search label{display:block;margin-bottom:7px;font-size:13px}.search-controls{display:flex;gap:8px;flex-wrap:wrap}.search-controls input{min-width:140px;flex:1;padding:10px 12px;border:1px solid var(--line);border-radius:6px;font:inherit;color:var(--ink);background:var(--wash)}.search-controls button{padding:9px 15px;border:1px solid var(--line);border-radius:6px;background:var(--wash);color:var(--ink);font:inherit;cursor:pointer}.search-controls button[type=submit]{background:#315cae;color:white;border-color:#315cae}.search-controls input:focus-visible,.search-controls button:focus-visible,.notebook-search summary:focus-visible{outline:3px solid #8b5cf6;outline-offset:3px}.notebook-search [role=status]{color:var(--muted);font-size:13px}.notebook-results{padding:0;list-style:none;margin:0}.notebook-results li{padding:12px 0;border-top:1px solid var(--line)}.notebook-results a{display:block;font-size:15px;font-weight:650;overflow-wrap:anywhere}.notebook-results small{display:block;color:var(--muted);font-size:11px}.notebook-results p{color:var(--muted);font-size:12px;line-height:1.8;margin:5px 0 0;overflow-wrap:anywhere}.search-archive{font-size:13px}.notebook-search [hidden]{display:none}@media(max-width:650px){.notebook-search{padding:13px 16px}.notebook-search summary span{display:block;margin-left:20px}.search-controls input{flex-basis:100%}}