:root{--ink:#142d31;--muted:#647173;--green:#087f72;--line:#e5eae7;--cloud:#f7f9f7;--mint:#e8f7f1}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;background:#fff;color:var(--ink);font:15px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif}a{color:var(--green);text-decoration:none}a:hover{text-decoration:underline}button,input{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #50e1bd;outline-offset:4px}header{height:80px;position:fixed;z-index:30;inset:0 0 auto;display:flex;align-items:center;gap:24px;padding:0 34px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.97);backdrop-filter:blur(14px)}.brand{display:flex}.brand img{width:135px;height:45px;object-fit:contain}.header-label{font-size:14px;color:var(--muted);border-left:1px solid var(--line);padding-left:24px}.search-open{margin-left:auto;display:flex;align-items:center;gap:12px;background:var(--cloud);border:1px solid var(--line);color:var(--muted);padding:8px 14px;border-radius:8px;width:270px;text-align:left}.search-open kbd{font:11px inherit;margin-left:auto;border:1px solid #dbe2dd;border-radius:4px;padding:0 4px}.back-site{font-size:13px;color:var(--ink)}.menu-toggle{display:none}#sidebar{position:fixed;inset:80px auto 0 0;width:260px;background:var(--cloud);border-right:1px solid var(--line);overflow-y:auto;padding:28px 20px;z-index:25}.sidebar-intro{font-size:12px;color:var(--muted);padding:0 14px 20px;display:flex;align-items:center;gap:9px}.status-dot{width:6px;height:6px;border-radius:50%;background:var(--green)}.nav-group{margin:0 0 24px}.nav-group p{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1.2px;margin:0 14px 8px;color:#85908c}.nav-group a{display:block;color:#52615f;padding:6px 14px;border-radius:6px;font-size:13px;line-height:1.7;margin-bottom:2px}.nav-group a:hover{background:#eef2ee;text-decoration:none}.nav-group a[aria-current]{background:#e3f0e9;color:#087163;font-weight:600;box-shadow:inset 2px 0 #087f72}.sidebar-contact{display:flex;justify-content:space-between;margin:5px 14px;padding:14px 0;border-top:1px solid var(--line);font-size:13px}.layout{margin:80px 0 0 260px;display:grid;grid-template-columns:minmax(0,780px) 190px;gap:55px;padding:42px 48px 0;max-width:1260px}main{min-width:0;max-width:760px}.breadcrumb{font-size:12px;color:var(--muted);margin-bottom:25px}.breadcrumb span{padding:0 10px;color:#b4bdb8}.article-tools{display:flex;justify-content:space-between;font-size:11px;color:#87928d}.copy-link{color:var(--muted);border:0;background:none;font-size:11px;padding:0}h1{font-size:42px;line-height:1.17;letter-spacing:-1.6px;margin:16px 0 20px;font-weight:720}.lead{font-size:19px;line-height:1.6;color:#73807a;margin:0 0 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0}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:var(--ink);color:white;border-radius:8px;padding:10px 20px;font-size:13px;z-index:60}.toast:empty{display:none}.sr-only,.skip{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.skip:focus{width:auto;height:auto;clip:auto;top:5px;left:10px;background:white;z-index:100;padding:8px}.backdrop{display:none}@media(min-width:1600px){.layout{margin-left:max(260px,calc((100vw - 1500px)/2 + 260px))}#sidebar{padding-left:max(20px,calc((100vw - 1500px)/2 + 20px));width:max(260px,calc((100vw - 1500px)/2 + 260px))}}@media(max-width:1200px){.layout{gap:32px;padding:36px 34px;grid-template-columns:minmax(0,1fr)}.toc{display:none}header{padding:0 25px;gap:20px}#sidebar{width:235px}.layout{margin-left:235px}}@media(max-width:800px){header{height:68px;padding:0 20px;gap:14px}.brand img{width:112px;height:38px}.header-label{border:0;padding:0;font-size:12px}.back-site{display:none}.search-open{width:auto;margin-left:auto;padding:6px 12px;font-size:20px}.search-open span,.search-open kbd{display:none}.menu-toggle{display:block;border:0;background:var(--cloud);padding:6px 10px;border-radius:5px;font-size:20px;color:var(--ink)}#sidebar{top:68px;width:280px;transform:translateX(-101%);transition:transform .2s}.layout{display:block;margin:68px 0 0;padding:27px 24px 0}body.nav-open #sidebar{transform:translateX(0)}body.nav-open{overflow:hidden}body.nav-open .backdrop{display:block;position:fixed;inset:68px 0 0;background:#102c3160;z-index:20}.backdrop[hidden]{display:none}h1{font-size:34px;letter-spacing:-1px}.lead{font-size:18px;margin-bottom:30px}.article-body{font-size:15px}.article-body h2{font-size:23px}.breadcrumb{margin-bottom:20px}.article-links{grid-template-columns:1fr}.pagination{gap:9px}.pagination a{padding:12px}.pagination strong{font-size:12px}footer{flex-direction:column;gap:4px}table{font-size:12px}th,td{padding:11px 8px}.note{padding:15px 17px}.article-tools{font-size:10px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}@media print{header,#sidebar,.toc,.article-tools,dialog,.pagination{display:none}.layout{display:block;margin:0;padding:0}main{max-width:none}a{color:inherit}footer{border-top:1px solid #ddd}}

/* NUVAN SEO */
.article-tools{gap:12px;flex-wrap:wrap}.article-tools time{color:#647173}.article-tools .copy-link{margin-left:auto}