:root{--bg: #ffffff;--bg-soft: #f4f6fa;--fg: #15202b;--muted: #56657a;--brand: #1b3a5c;--accent: #1e4f8a;--accent-dark: #163a66;--accent-soft: #e8eef7;--cta: #f97316;--cta-dark: #ea670c;--border: #e2e8f0;--border-strong: #cbd5e1;--card: #ffffff;--ok: #0f8a5f;--warn: #b54708;--maxw: 1080px;--radius: 14px;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";--c: var(--accent)}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{margin:0;font-family:var(--font);font-size:18px;line-height:1.65;color:var(--fg);background:var(--bg);-webkit-font-smoothing:antialiased;border-top:4px solid var(--brand)}.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}a{color:var(--accent-dark);text-underline-offset:2px}a:hover{color:var(--accent)}img{max-width:100%;height:auto}h1,h2,h3{line-height:1.2;font-weight:700;letter-spacing:-.01em;color:var(--fg)}h1{font-size:clamp(2rem,4vw,2.7rem);margin:0 0 .5em;color:var(--brand)}h2{font-size:clamp(1.4rem,2.6vw,1.85rem);margin:1.8em 0 .5em}h3{font-size:1.2rem;margin:1.5em 0 .4em}.site-header{position:sticky;top:0;z-index:30;background:#fffffff5;backdrop-filter:saturate(160%) blur(8px);border-bottom:1px solid var(--border-strong);transition:transform .28s ease}.site-header.header-hidden{transform:translateY(-100%)}.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:62px;flex-wrap:wrap}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.2rem;color:var(--brand);text-decoration:none}.brand img{width:30px;height:30px}.nav{display:flex;gap:4px;flex-wrap:wrap;align-items:center}.nav a{color:#334155;text-decoration:none;font-size:.97rem;font-weight:600;padding:8px 12px;border-radius:9px;line-height:1;transition:background .12s ease,color .12s ease}.nav a:hover,.nav a.active{background:var(--accent-soft);color:var(--accent-dark)}@media (max-width: 820px){.nav{display:none}}.fab-menu{position:fixed;top:14px;right:14px;z-index:50;width:50px;height:50px;border:none;border-radius:14px;background:var(--brand);cursor:pointer;display:none;align-items:center;justify-content:center;box-shadow:0 8px 22px #065f464d}.fab-menu.show{display:inline-flex}@media (max-width: 820px){.fab-menu{display:inline-flex}}.fab-menu .bars,.fab-menu .bars:before,.fab-menu .bars:after{content:"";display:block;width:22px;height:2.5px;background:#fff;border-radius:3px}.fab-menu .bars{position:relative}.fab-menu .bars:before,.fab-menu .bars:after{content:"";position:absolute;left:0}.fab-menu .bars:before{top:-7px}.fab-menu .bars:after{top:7px}.menu-overlay{position:fixed;inset:0;background:#08141073;opacity:0;visibility:hidden;transition:opacity .2s ease;z-index:55}.menu-overlay.open{opacity:1;visibility:visible}.menu-panel{position:fixed;top:0;right:0;height:100%;width:min(330px,84vw);background:#fff;box-shadow:-10px 0 36px #0000002e;transform:translate(100%);transition:transform .28s ease;z-index:60;padding:22px 20px;overflow-y:auto}.menu-panel.open{transform:translate(0)}.menu-close{position:absolute;top:12px;right:14px;border:none;background:none;font-size:1.9rem;line-height:1;color:var(--muted);cursor:pointer}.menu-title{margin:4px 0 14px;font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);font-weight:700}.menu-list{list-style:none;padding:0;margin:0}.menu-list li{margin:2px 0}.menu-list a{display:flex;align-items:center;gap:10px;padding:13px 12px;border-radius:10px;text-decoration:none;color:var(--fg);font-weight:600}.menu-list a:hover,.menu-list a.active{background:var(--bg-soft)}.menu-list .dot{width:11px;height:11px;border-radius:50%;flex:none}.menu-list .m-icon{font-size:1.05rem}.hero{margin:28px 0 8px;padding:40px 32px;background:linear-gradient(180deg,#e8eef7,#f5f8fc);border:1px solid var(--border);border-radius:var(--radius)}.hero p.lead{font-size:1.22rem;color:var(--muted);max-width:60ch;margin:0}.topic-hero{background:color-mix(in srgb,var(--c) 10%,#ffffff);border-color:color-mix(in srgb,var(--c) 22%,#ffffff)}.topic-hero h1{color:var(--c)}.lead{font-size:1.15rem;color:var(--muted)}.muted{color:var(--muted)}.section{padding:26px 0 8px}.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap}.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));margin:22px 0}.card{display:block;padding:22px;background:var(--card);text-decoration:none;color:var(--fg);border:1px solid var(--border);border-top:4px solid var(--c);border-radius:var(--radius);transition:transform .15s ease,box-shadow .15s ease}.card:hover{transform:translateY(-3px);box-shadow:0 10px 28px color-mix(in srgb,var(--c) 22%,transparent)}.card h3{margin:0 0 6px;color:var(--c);display:flex;align-items:center;gap:8px}.card .card-icon{font-size:1.15rem}.card p{margin:0;color:var(--muted);font-size:.98rem}.post-list{list-style:none;padding:0;margin:16px 0}.post-list li{padding:18px 0;border-bottom:1px solid var(--border)}.post-list a.post-title{font-size:1.2rem;font-weight:700;text-decoration:none;color:var(--brand)}.post-list a.post-title:hover{color:var(--accent-dark)}.post-meta{font-size:.86rem;color:var(--muted);margin:4px 0 0}.badge{display:inline-block;font-size:.74rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:#fff;background:var(--c);padding:4px 11px;border-radius:999px}.prose{max-width:72ch}.prose p,.prose ul,.prose ol,.prose blockquote{margin:1em 0}.prose ul,.prose ol{padding-left:1.3em}.prose li{margin:.4em 0}.prose a{font-weight:600}.prose blockquote{border-left:4px solid var(--c);padding:2px 0 2px 16px;color:var(--muted);margin-left:0}.prose code{background:var(--bg-soft);padding:2px 6px;border-radius:6px;font-size:.9em}.prose table{width:100%;border-collapse:collapse;font-size:.96rem}.prose th,.prose td{border:1px solid var(--border);padding:8px 10px;text-align:left}.prose th{background:var(--bg-soft)}.callout{border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px;margin:22px 0;background:var(--bg-soft)}.callout.tip{border-left:4px solid var(--ok)}.callout.warn{border-left:4px solid var(--warn)}.callout p:first-child{margin-top:0}.callout p:last-child{margin-bottom:0}.disclosure{font-size:.88rem;color:var(--muted);background:var(--bg-soft);border:1px solid var(--border);border-radius:10px;padding:12px 14px;margin:18px 0}.btn{display:inline-block;background:var(--cta);color:#fff;text-decoration:none;font-weight:700;padding:12px 20px;border-radius:10px}.btn:hover{background:var(--cta-dark);color:#fff}.btn-secondary{display:inline-block;border:1.5px solid var(--c);color:var(--c);background:#fff;text-decoration:none;font-weight:700;padding:10px 16px;border-radius:10px}.btn-secondary:hover{background:var(--c);color:#fff}.breadcrumb{font-size:.9rem;color:var(--muted);margin:22px 0 10px;font-weight:500}.breadcrumb a{color:var(--c);text-decoration:none}.breadcrumb a:hover{text-decoration:underline}.related{margin:44px 0 8px;padding:24px 26px;border-radius:var(--radius);background:color-mix(in srgb,var(--c) 8%,#ffffff);border:1px solid color-mix(in srgb,var(--c) 28%,#ffffff)}.related h2{margin:0 0 12px;font-size:1.2rem;color:var(--c)}.related-list{list-style:none;padding:0;margin:0 0 18px}.related-list li{padding:8px 0;border-bottom:1px solid color-mix(in srgb,var(--c) 22%,#ffffff)}.related-list li:last-child{border-bottom:none}.related-list a{color:var(--accent-dark);text-decoration:none;font-weight:600}.related-list a:hover{text-decoration:underline}.author-bio{display:flex;gap:16px;align-items:flex-start;margin:40px 0 8px;padding:22px 24px;background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius)}.author-avatar{flex:none;width:54px;height:54px;border-radius:50%;background:var(--brand);color:#fff;font-weight:800;font-size:1.1rem;display:flex;align-items:center;justify-content:center}.author-text p{margin:0 0 6px}.author-name{font-weight:700;color:var(--fg)}.author-role{font-size:.9rem;color:var(--muted);font-weight:600}.author-bio .bio{font-size:.97rem;color:var(--fg);margin-top:4px}.prose figure{margin:24px 0}.prose figure img{border:1px solid var(--border);border-radius:10px;display:block}.prose figcaption{font-size:.85rem;color:var(--muted);margin-top:8px}.share-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:32px 0 4px}.share-row .share-label{font-weight:700;color:var(--brand)}.share-row a{text-decoration:none;font-weight:600;font-size:.9rem;padding:7px 14px;border:1px solid var(--border-strong);border-radius:999px;color:var(--accent-dark)}.share-row a:hover{background:var(--accent-soft);color:var(--accent-dark)}.site-footer{margin-top:64px;border-top:1px solid var(--border-strong);background:var(--bg-soft)}.site-footer .wrap{padding:34px 20px;display:flex;gap:24px;flex-wrap:wrap;justify-content:space-between}.site-footer a{color:var(--muted);text-decoration:none;display:block;margin:6px 0;font-size:.95rem}.site-footer a:hover{color:var(--accent-dark)}.site-footer h2{margin:0 0 8px;font-size:.8rem;text-transform:uppercase;letter-spacing:.05em;color:var(--brand);font-weight:700}.footer-note{font-size:.85rem;color:var(--muted)}@media (max-width: 560px){body{font-size:17px}.hero{padding:28px 20px;margin-top:18px}}