:root{--bg:#fff;--soft:#f5f8fc;--soft2:#edf4fb;--blue:#3f8fe5;--blue2:#245f9e;--deep:#153f66;--title:#16283c;--text:#43566a;--muted:#718296;--border:#dce7f2;--tag:#eaf4ff;--footer:#123958;--shadow:0 18px 55px rgba(24,72,112,.10)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:120px}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:var(--bg);line-height:1.72;overflow-x:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto}.shell{width:min(1180px,calc(100% - 40px));margin:auto}.safety-strip{background:#eaf4ff;color:#245f9e;text-align:center;padding:9px 20px;font-size:13px}.site-header{position:sticky;top:0;z-index:90;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}.nav-shell{width:min(1240px,calc(100% - 32px));height:76px;margin:auto;display:flex;align-items:center;gap:22px}.brand{display:flex;align-items:center;min-width:128px}.brand img{width:126px;max-height:44px;object-fit:contain}.desktop-nav{display:flex;align-items:center;gap:3px;flex:1;justify-content:center}.nav-group{position:relative}.nav-trigger{border:0;background:transparent;color:var(--title);font-weight:650;padding:14px 10px;cursor:pointer;font-size:14px}.nav-trigger:focus-visible,.lang-link:focus-visible,.download-btn:focus-visible,.menu-toggle:focus-visible,.mobile-accordion:focus-visible,a:focus-visible{outline:3px solid rgba(63,143,229,.35);outline-offset:3px}.mega{position:absolute;top:56px;left:50%;transform:translateX(-50%);width:min(820px,90vw);display:grid;grid-template-columns:1.1fr 1.25fr .9fr;gap:26px;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow);padding:28px;border-radius:16px}.mega[hidden]{display:none}.mega-intro p{margin:4px 0 14px}.mega-intro a,.mega-feature a{color:var(--blue2)}.mega-links{display:grid;grid-template-columns:1fr 1fr;gap:8px}.mega-links a{padding:10px;border-bottom:1px solid #eef3f8;color:var(--title)}.mega-feature{background:var(--soft);padding:18px;display:flex;flex-direction:column;gap:10px;border-radius:12px}.nav-actions{display:flex;align-items:center;gap:10px}.lang-link{font-weight:700;color:var(--blue2);padding:10px}.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 18px;background:var(--blue2);color:#fff;border-radius:10px;font-weight:750}.menu-toggle{display:none;width:44px;height:44px;border:1px solid var(--border);background:#fff;border-radius:10px;padding:10px}.menu-toggle span{display:block;height:2px;background:var(--title);margin:5px 0}.mobile-menu{position:fixed;inset:0;z-index:120;background:#fff;overflow:auto;padding:18px 20px}.mobile-menu[hidden]{display:none}.mobile-head{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border);padding-bottom:14px}.mobile-head>div{display:flex;align-items:center;gap:8px}.menu-close{font-size:30px;border:0;background:none;width:44px;height:44px}.mobile-groups section{border-bottom:1px solid var(--border)}.mobile-accordion{width:100%;min-height:52px;display:flex;justify-content:space-between;align-items:center;border:0;background:#fff;color:var(--title);font-size:17px;font-weight:750;text-align:left}.mobile-links{display:grid;padding:0 0 16px 12px}.mobile-links a{padding:10px 0}.mobile-foot{display:grid;gap:12px;padding:24px 0}.eyebrow{text-transform:uppercase;letter-spacing:.08em;font-size:12px;font-weight:800;color:var(--blue2)}h1,h2,h3{color:var(--title);line-height:1.22}h1{font-size:clamp(36px,5.3vw,68px);letter-spacing:-.035em;margin:10px 0 18px}h2{font-size:clamp(26px,3vw,38px);margin:55px 0 14px}h3{font-size:21px;margin:28px 0 8px}.lead{font-size:18px;max-width:760px;color:#52677c}.breadcrumb{display:flex;gap:8px;font-size:13px;color:var(--muted);padding-top:24px}.article-hero{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(260px,.6fr);gap:56px;align-items:end;padding:64px 0 52px;border-bottom:1px solid var(--border)}.article-hero h1{font-size:clamp(38px,5vw,62px)}.hero-note{background:var(--soft2);border-left:4px solid var(--blue);padding:24px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:70px;align-items:start}.prose{max-width:800px;padding-bottom:80px}.prose p{font-size:17px;color:#42566a}.toc{position:sticky;top:112px;margin-top:42px;border-left:1px solid var(--border);padding-left:22px}.toc-toggle{display:none}.toc ol{margin:0;padding-left:20px}.toc a{font-size:14px;color:var(--muted)}.check-panel{background:var(--deep);color:#dcecff;margin:50px 0;padding:34px;border-radius:16px}.check-panel h2{color:#fff;margin-top:0}.check-panel li{margin:8px 0}.related-links{display:grid;grid-template-columns:1fr 1fr;gap:10px}.related-links a{display:flex;justify-content:space-between;border-top:1px solid var(--border);padding:14px 0;color:var(--blue2)}
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