:root{--ink:#16211f;--muted:#58645f;--line:#d8e0dc;--paper:#fff;--soft:#f3f7f5;--brand:#0f766e;--brand-dark:#0b4f4a;--accent:#b45309;--blue:#1d4ed8;--shadow:0 12px 30px rgba(22,33,31,.08)}
*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:#f8faf9;line-height:1.65}a{color:var(--brand-dark);text-decoration-thickness:1px;text-underline-offset:3px}img{max-width:100%;height:auto}.container{width:min(1120px,calc(100% - 32px));margin-inline:auto}.skip-link{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:8px 12px;z-index:20}.skip-link:focus{left:8px}.site-header{position:sticky;top:0;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);z-index:10}.nav-shell{display:flex;align-items:center;gap:18px;min-height:68px}.brand{display:flex;align-items:center;gap:9px;font-weight:700;color:var(--ink);text-decoration:none}.brand span{display:grid;place-items:center;width:34px;height:34px;background:var(--brand);color:#fff;border-radius:7px}.site-nav{margin-left:auto;display:flex;gap:4px;flex-wrap:wrap}.site-nav a{color:var(--ink);text-decoration:none;padding:8px 10px;border-radius:7px;font-size:14px}.site-nav a:hover,.site-nav a[aria-current=page]{background:var(--soft);color:var(--brand-dark)}.menu-toggle{display:none;margin-left:auto;border:1px solid var(--line);background:#fff;border-radius:7px;padding:8px 10px}.hero{background:linear-gradient(135deg,#e6f4f1,#fff 62%,#fff4e6);border-bottom:1px solid var(--line)}.hero-inner{min-height:360px;display:flex;align-items:center;padding:56px 0}.hero h1{font-size:clamp(34px,5vw,58px);line-height:1.05;margin:0 0 18px;max-width:780px}.hero p{max-width:720px;font-size:19px;color:var(--muted)}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 16px;border-radius:8px;background:var(--brand);color:#fff;text-decoration:none;font-weight:700}.button.secondary{background:var(--accent)}.button.ghost{background:#fff;color:var(--brand-dark);border:1px solid var(--line)}.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;padding:34px 0 54px}.content-card{background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:28px;box-shadow:var(--shadow);min-width:0}.breadcrumbs{display:flex;gap:8px;flex-wrap:wrap;font-size:14px;color:var(--muted);margin-bottom:18px}.breadcrumbs a:after{content:"/";margin-left:8px;color:var(--muted)}.eyebrow{text-transform:uppercase;letter-spacing:.08em;font-size:12px;font-weight:700;color:var(--brand-dark);margin:0 0 8px}.article-header h1{font-size:clamp(30px,4vw,46px);line-height:1.12;margin:0 0 14px}.lede{font-size:18px;color:var(--muted);margin:0 0 10px}.updated{font-size:14px;color:var(--muted)}h2{font-size:26px;line-height:1.2;margin:34px 0 12px}h3{font-size:20px;line-height:1.25;margin:24px 0 8px}p,li{font-size:16px}ul{padding-left:22px}.toc{background:var(--soft);border:1px solid var(--line);border-radius:8px;padding:16px;margin:24px 0}.toc ol{columns:2;margin:8px 0 0;padding-left:20px}.table-wrap{overflow-x:auto;margin:18px 0;border:1px solid var(--line);border-radius:8px}table{width:100%;border-collapse:collapse;background:#fff}th,td{padding:12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{background:var(--soft)}.card-grid,.related-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.topic-card,.related-grid a{display:block;border:1px solid var(--line);border-radius:8px;padding:16px;background:#fff;text-decoration:none;color:var(--ink)}.topic-card strong{display:block;margin-bottom:6px}.topic-card span{display:block;color:var(--muted);font-size:14px}.topic-card:hover,.related-grid a:hover{border-color:var(--brand);box-shadow:0 6px 16px rgba(15,118,110,.1)}.faq-list details{border:1px solid var(--line);border-radius:8px;padding:12px 14px;margin:10px 0;background:#fff}.faq-list summary{cursor:pointer;font-weight:700}.source-note{margin-top:34px;padding:18px;border-radius:8px;background:#fff8ed;border:1px solid #f3d7aa}.sidebar{display:flex;flex-direction:column;gap:22px}.trust-card{background:#fff;border:1px solid var(--line);border-radius:8px;padding:18px;position:sticky;top:118px}.trust-card h2{font-size:20px;margin-top:0}.ad{display:block;min-height:120px;margin:28px 0;padding:12px;border:1px dashed #b7c4bf;border-radius:8px;background:#fbfdfc;text-align:center;clear:both}.ad span{display:block;font-size:12px;color:var(--muted);margin-bottom:10px}.ad-top_leaderboard{min-height:110px}.ad-in_article_1{min-height:250px}.sidebar .ad{min-height:280px;margin:0;position:sticky;top:86px}.ad-footer_display{min-height:120px}.site-footer{border-top:1px solid var(--line);background:#12201d;color:#eaf4f1;padding:30px 0}.site-footer a{color:#eaf4f1}.footer-grid{display:grid;grid-template-columns:1fr auto;gap:20px}.footer-grid nav{display:flex;flex-wrap:wrap;gap:14px;align-content:start}@media (max-width:900px){.menu-toggle{display:inline-flex}.site-nav{display:none;position:absolute;left:16px;right:16px;top:62px;background:#fff;border:1px solid var(--line);border-radius:8px;padding:10px;box-shadow:var(--shadow)}.site-nav.is-open{display:grid;grid-template-columns:1fr 1fr}.content-grid{grid-template-columns:1fr}.sidebar{display:none}.content-card{padding:20px}.toc ol{columns:1}.card-grid,.related-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.hero-inner{min-height:320px;padding:42px 0}.hero-actions .button{width:100%}}@media (max-width:560px){.container{width:min(100% - 22px,1120px)}.content-card{padding:16px}.article-header h1{font-size:30px}.hero h1{font-size:36px}.site-nav.is-open{grid-template-columns:1fr}.ad{margin:32px 0;min-height:180px}}