:root{--bg:#f6f7f9;--surface:#fff;--text:#17202a;--muted:#657080;--line:#e4e8ee;--accent:#2463eb;--accent-soft:#eef4ff;--shadow:0 10px 30px rgba(20,35,60,.06);--radius:16px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body.nwl-site{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:16px;line-height:1.7}a{color:inherit}.nwl-wrap{width:min(1120px,calc(100% - 32px));margin:auto}.nwl-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--line)}.nwl-header-inner{min-height:72px;display:flex;align-items:center;gap:22px}.nwl-brand{display:flex;align-items:center;gap:10px;text-decoration:none;min-width:145px}.nwl-mark{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;background:var(--text);color:#fff;font-weight:800}.nwl-brand strong,.nwl-brand small{display:block;line-height:1.1}.nwl-brand small{color:var(--muted);font-size:12px;margin-top:3px}.nwl-search-wrap{position:relative;flex:1;max-width:660px;margin:auto}.nwl-search{width:100%;height:44px;border:1px solid var(--line);border-radius:12px;background:#f8fafc;padding:0 15px;font:inherit;outline:none}.nwl-search:focus{border-color:#9db8f7;box-shadow:0 0 0 4px var(--accent-soft)}.nwl-results{display:none;position:absolute;top:50px;left:0;right:0;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);overflow:hidden}.nwl-results.show{display:block}.nwl-result{display:block;padding:12px 15px;text-decoration:none;border-bottom:1px solid var(--line)}.nwl-result:last-child{border:0}.nwl-result strong,.nwl-result span{display:block}.nwl-result span{font-size:13px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.nwl-theme{border:0;background:transparent;font-size:22px;cursor:pointer;color:var(--muted)}.nwl-main{padding:28px 0 60px}.nwl-breadcrumbs{display:flex;gap:9px;align-items:center;color:var(--muted);font-size:14px;margin:0 0 16px;overflow:auto;white-space:nowrap}.nwl-breadcrumbs a{text-decoration:none}.nwl-card,.nwl-home-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:30px}.nwl-article-head{max-width:800px;margin-bottom:24px}.nwl-article-head h1,.nwl-card>h1{font-size:clamp(32px,5vw,50px);line-height:1.08;letter-spacing:-.035em;margin:0 0 12px}.nwl-lead{font-size:18px;color:var(--muted);margin:0}.nwl-article-body{max-width:900px}.nwl-article-body>p,.nwl-article-body>ul,.nwl-article-body>ol,.nwl-article-body>h2,.nwl-article-body>h3,.nwl-article-body>h4{max-width:780px}.nwl-article-body h2{font-size:28px;line-height:1.2;margin-top:42px}.nwl-article-body h3{font-size:21px;margin-top:30px}.nwl-article-body img{max-width:100%;height:auto;border-radius:12px}.nwl-facts{float:right;width:min(310px,38%);margin:0 0 24px 30px;background:var(--accent-soft);border:1px solid #dbe7ff;border-radius:14px;padding:16px}.nwl-facts-title{font-weight:800;margin-bottom:8px}.nwl-facts div{display:flex;justify-content:space-between;gap:12px;border-top:1px solid rgba(36,99,235,.12);padding:7px 0;font-size:14px}.nwl-facts span{text-align:right;color:var(--muted)}.nwl-toc{border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin:0 0 28px;background:#fafbfd;max-width:780px}.nwl-toc ol{margin:7px 0 0;padding-left:22px}.nwl-toc li.level-3{margin-left:16px;font-size:14px}.nwl-related{clear:both;border-top:1px solid var(--line);margin-top:44px;padding-top:28px}.nwl-related h2{margin-top:0}.nwl-related-grid,.nwl-topic-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.nwl-related-grid a,.nwl-topic-grid a{padding:16px;border:1px solid var(--line);border-radius:12px;text-decoration:none}.nwl-related-grid strong,.nwl-related-grid span,.nwl-topic-grid strong,.nwl-topic-grid span{display:block}.nwl-related-grid span,.nwl-topic-grid span{font-size:13px;color:var(--muted)}.nwl-list{display:grid}.nwl-list-item{display:block;text-decoration:none;padding:17px 4px;border-bottom:1px solid var(--line)}.nwl-list-item strong{display:block;font-size:17px}.nwl-list-item span{display:block;color:var(--muted);font-size:14px}.nwl-hero{background:var(--text);color:#fff;border-radius:22px;padding:clamp(40px,7vw,90px);margin-bottom:18px}.nwl-kicker{font-size:12px;letter-spacing:.16em;opacity:.65;font-weight:800}.nwl-hero h1{font-size:clamp(40px,7vw,72px);line-height:1;letter-spacing:-.05em;margin:10px 0 16px}.nwl-hero p{max-width:650px;font-size:18px;opacity:.82}.nwl-section-head{display:flex;justify-content:space-between;align-items:center;gap:15px}.nwl-section-head a{text-decoration:none;color:var(--accent);font-weight:700}.nwl-home-card{margin-bottom:18px}.nwl-home-card h2{margin-top:0}.nwl-footer{padding:28px 0;color:var(--muted);font-size:13px;border-top:1px solid var(--line)}.screen-reader-text{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:720px){.nwl-header-inner{gap:10px;flex-wrap:wrap;padding:10px 0}.nwl-brand{min-width:125px}.nwl-search-wrap{order:3;flex-basis:100%;max-width:none}.nwl-main{padding-top:18px}.nwl-card,.nwl-home-card{padding:20px}.nwl-facts{float:none;width:auto;margin:0 0 22px}.nwl-related-grid,.nwl-topic-grid{grid-template-columns:1fr}.nwl-hero{border-radius:16px;padding:40px 24px}.nwl-theme{margin-left:auto}}
body.nwl-dark{--bg:#0e131a;--surface:#151c25;--text:#eef2f7;--muted:#9aa7b7;--line:#283341;--accent:#77a3ff;--accent-soft:#172641}.nwl-dark .nwl-header{background:rgba(14,19,26,.94)}.nwl-dark .nwl-search{background:#111821;color:var(--text)}.nwl-dark .nwl-toc{background:#111821}

/* Keep TOC jump targets visible below a sticky header. */
.nwl-article-body h2[id] {
    scroll-margin-top: 110px;
}