:root{--yellow:#FBB615;--amber:#CA802A;--ink:#231F20;--text:#1f2937;--muted:#6b7280;--line:#e5e7eb;--bg:#f7f8fa;--card:#fff;--radius:12px;--max:1120px}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.55;font-size:16px}
a{color:var(--amber);text-decoration:none}a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}
.hdr{background:#fff;border-bottom:3px solid var(--yellow);position:sticky;top:0;z-index:20}
.hdr-in{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:600;white-space:nowrap}
.brand img{height:40px;width:auto;display:block}
.brand-txt{font-size:15px;padding-left:10px;border-left:1px solid var(--line);color:var(--muted);font-weight:500}
.hdr-search{flex:1;display:flex;position:relative;max-width:520px;margin:0 auto}
.hdr-search input{flex:1;border:1px solid var(--line);border-radius:999px;padding:9px 44px 9px 16px;font-size:14px;background:var(--bg);outline:none}
.hdr-search input:focus{border-color:var(--yellow);background:#fff;box-shadow:0 0 0 3px rgba(251,182,21,.25)}
.hdr-search button{position:absolute;right:6px;top:4px;height:32px;width:32px;border:0;background:transparent;color:var(--muted);cursor:pointer;border-radius:50%}
.hdr-search button:hover{background:var(--bg);color:var(--ink)}
.typeahead{position:absolute;top:44px;left:0;right:0;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,.08);overflow:hidden;z-index:30}
.typeahead a{display:block;padding:10px 14px;color:var(--text);font-size:14px;border-bottom:1px solid #f1f2f4}
.typeahead a:hover,.typeahead a.active{background:#fff8e6;text-decoration:none}
.typeahead a small{display:block;color:var(--muted);font-size:12px}
.hdr-nav{display:flex;align-items:center;gap:14px;white-space:nowrap}
.hdr-nav a{color:var(--text);font-size:14px;font-weight:500}
.btn-support,.btn{background:var(--ink);color:#fff!important;padding:9px 16px;border-radius:999px;font-weight:600;font-size:14px;display:inline-block}
.btn-support:hover,.btn:hover{background:#000;text-decoration:none}
.btn.small{padding:7px 14px;font-size:13px}
.announce{background:#fff8e6;border-bottom:1px solid #f3e0a8;font-size:14px;padding:8px 0;color:#5b4300}
.main{padding:28px 20px 56px;min-height:60vh}
.hero{text-align:center;padding:40px 0 28px}
.hero h1{font-size:40px;letter-spacing:-.02em;margin:0 0 8px;color:var(--ink)}
.lead{font-size:18px;color:var(--muted);margin:0 0 18px}
.hero-search{display:flex;max-width:680px;margin:18px auto 0;background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px;box-shadow:0 8px 24px rgba(0,0,0,.05)}
.hero-search input{flex:1;border:0;font-size:16px;padding:10px 16px;outline:none;background:transparent;min-width:0}
.hero-search button{border:0;background:var(--yellow);color:var(--ink);font-weight:700;padding:10px 22px;border-radius:999px;cursor:pointer}
.hero-search button:hover{background:#e8a60f}
.sec-hd{display:flex;align-items:baseline;justify-content:space-between;margin:28px 0 14px}
.sec-hd h2,.sec-title{font-size:20px;margin:0;color:var(--ink)}
.sec-title{margin:30px 0 12px}
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.cat-card{display:flex;gap:14px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;color:var(--text);transition:box-shadow .15s,transform .15s,border-color .15s}
.cat-card:hover{text-decoration:none;box-shadow:0 10px 26px rgba(0,0,0,.07);transform:translateY(-1px);border-color:#f0d58a}
.cat-ic{flex:0 0 46px;height:46px;border-radius:12px;background:#fff4d6;color:var(--amber);display:flex;align-items:center;justify-content:center}
.cat-ic.lg{flex-basis:56px;height:56px}
.cat-body h3{margin:0 0 4px;font-size:16px;color:var(--ink)}
.cat-body p{margin:0 0 6px;font-size:13.5px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cat-n{font-size:12px;color:var(--muted);font-weight:500}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.art-list{list-style:none;margin:0;padding:0}
.art-list li{padding:10px 0;border-bottom:1px solid var(--line)}
.art-list li a{font-weight:500;color:var(--text);font-size:15px}
.art-list li a:hover{color:var(--amber)}
.art-list.big li{padding:16px 0}
.art-list.big li a{font-size:17px;font-weight:600;color:var(--ink)}
.art-list.big li p{margin:4px 0 6px;color:var(--muted);font-size:14.5px}
.art-list p mark{background:#fff0bf;padding:0 2px;border-radius:3px}
.crumb-min{display:block;font-size:12px;color:var(--muted);margin-top:2px}
.cta{margin-top:40px;background:var(--ink);color:#fff;border-radius:var(--radius);padding:26px 28px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.cta h2{margin:0 0 4px;font-size:20px}.cta p{margin:0;color:#cfcfcf}
.cta .btn{background:var(--yellow);color:var(--ink)!important}
.crumbs{font-size:13.5px;color:var(--muted);display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.crumbs a{color:var(--muted)}.crumbs a:hover{color:var(--amber)}
.cat-hd{display:flex;gap:16px;align-items:center;margin-bottom:18px}
.cat-hd h1{margin:0;font-size:30px;color:var(--ink);letter-spacing:-.01em}
.cat-hd .lead{margin:2px 0 0;font-size:16px}
.sub-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:14px;margin:12px 0 8px}
.sub-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;color:var(--text)}
.sub-card:hover{text-decoration:none;border-color:#f0d58a;box-shadow:0 8px 22px rgba(0,0,0,.06)}
.sub-card h3{margin:0 0 4px;font-size:16px;color:var(--ink)}
.sub-card p{margin:0 0 6px;font-size:13.5px;color:var(--muted)}
.art-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:36px;align-items:start}
.art{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:34px 40px}
.art h1{margin:0 0 6px;font-size:32px;letter-spacing:-.02em;color:var(--ink);line-height:1.2}
.art-meta{font-size:13px;color:var(--muted);margin-bottom:18px}
.art .lead{font-size:17px}
.art-body{font-size:16px;line-height:1.7}
.art-body h1{font-size:24px}.art-body h2{font-size:22px;margin:28px 0 10px;color:var(--ink)}.art-body h3{font-size:18px;margin:22px 0 8px;color:var(--ink)}
.art-body p{margin:0 0 14px}
.art-body img{border-radius:8px;border:1px solid var(--line);margin:8px 0;max-width:100%;height:auto!important}
.art-body ul,.art-body ol{padding-left:24px;margin:0 0 14px}
.art-body li{margin:4px 0}
.art-body blockquote{border-left:4px solid var(--yellow);margin:14px 0;padding:6px 16px;background:#fffbee;border-radius:0 8px 8px 0}
.art-body pre,.art-body code{background:#f3f4f6;border-radius:6px;font-size:14px}
.art-body pre{padding:12px 14px;overflow:auto}.art-body code{padding:1px 5px}
.art-body table{border-collapse:collapse;width:100%;margin:12px 0;font-size:14.5px}
.art-body th,.art-body td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.art-body th{background:#fafafa}
.art-body iframe,.art-body video{max-width:100%;border-radius:8px}
.art-body iframe{aspect-ratio:16/9;width:100%;height:auto;border:0}
.art-body a{text-decoration:underline;text-decoration-color:#f0d58a;text-underline-offset:2px}
.helpful{margin-top:32px;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:14.5px}
.helpful>span{font-weight:600;color:var(--ink)}
.helpful>button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 16px;cursor:pointer;font-weight:600;font-size:14px}
.helpful>button:hover{border-color:var(--yellow);background:#fff8e6}
.helpful>button.on{background:var(--yellow);border-color:var(--yellow)}
.helpful-more{flex-basis:100%;display:flex;gap:10px;align-items:flex-start;margin-top:6px}
.helpful-more textarea{flex:1;border:1px solid var(--line);border-radius:8px;padding:8px 10px;font:inherit;font-size:14px;resize:vertical}
.helpful-more .btn{border:0;cursor:pointer;font:inherit}
.helpful-thanks{flex-basis:100%;color:#166534;font-weight:500}
.art-side{position:sticky;top:88px}
.side-box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;margin-bottom:14px}
.side-box.soft{background:#fff8e6;border-color:#f3e0a8}
.side-box h4{margin:0 0 8px;font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.side-box p{margin:0;font-size:14px}
.side-list{list-style:none;margin:0;padding:0}.side-list li{padding:5px 0;font-size:14px}
.side-list a{color:var(--text)}.side-list a:hover{color:var(--amber)}
#toc{margin:0;padding-left:18px;font-size:13.5px}#toc li{margin:4px 0}#toc a{color:var(--text)}#toc a.active{color:var(--amber);font-weight:600}
.preview-bar{background:#1f2937;color:#fff;padding:10px 16px;border-radius:8px;margin-bottom:14px;font-size:14px}
.pill{display:inline-block;padding:2px 9px;border-radius:999px;font-size:12px;font-weight:600}
.pill.warn{background:#fef3c7;color:#92400e}
.sr-title{font-size:26px;margin:0 0 4px;color:var(--ink)}
.empty{background:var(--card);border:1px dashed var(--line);border-radius:var(--radius);padding:28px;text-align:center;color:var(--muted)}
.empty.tall{padding:60px 28px}.empty h1{color:var(--ink);font-size:26px;margin:0 0 8px}
.ftr{border-top:1px solid var(--line);background:#fff;margin-top:20px}
.ftr-in{display:flex;justify-content:space-between;align-items:center;padding:20px;font-size:13px;color:var(--muted);flex-wrap:wrap;gap:10px}
.ftr-links{display:flex;gap:16px}.ftr-links a{color:var(--muted)}
@media (max-width:900px){.art-layout{grid-template-columns:1fr}.art-side{position:static}.two-col{grid-template-columns:1fr}.art{padding:24px 22px}}
@media (max-width:720px){.hdr-in{height:auto;padding:10px 0;flex-wrap:wrap;gap:10px}.brand-txt{display:none}.hdr-search{order:3;flex-basis:100%;max-width:none}.hdr-nav a:not(.btn-support){display:none}.hero h1{font-size:30px}.hero{padding:24px 0 16px}.cta{flex-direction:column;align-items:flex-start}.art h1{font-size:26px}.cat-hd h1{font-size:24px}}