:root{--bg:#fff;--pale:#f5f8fc;--pale2:#edf4fb;--blue:#3f8fe5;--blue2:#245f9e;--deep:#153f66;--title:#16283c;--text:#43566a;--muted:#718296;--border:#dce7f2;--tag:#eaf4ff;--max:1200px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--text);background:#fff;line-height:1.72;overflow-x:hidden}body.menu-open{overflow:hidden}a{color:var(--blue2);text-decoration:none}a:hover{text-decoration:underline}img,svg{max-width:100%;height:auto}.skip-link{position:fixed;left:12px;top:-80px;z-index:1000;background:#fff;padding:10px 14px}.skip-link:focus{top:12px}.safety-bar{background:var(--pale2);color:#355674;text-align:center;font-size:13px;padding:8px 20px;border-bottom:1px solid var(--border)}.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid rgba(220,231,242,.9)}.header-inner{max-width:var(--max);margin:auto;height:74px;padding:0 24px;display:flex;align-items:center;gap:24px}.brand{display:inline-flex;align-items:center;flex:0 0 auto}.brand img{width:142px;height:auto}.desktop-nav{display:flex;gap:2px;flex:1;justify-content:center}.nav-group{position:relative}.nav-trigger{border:0;background:transparent;color:var(--title);font:inherit;font-size:14px;font-weight:650;padding:24px 11px;cursor:pointer}.nav-trigger:focus-visible,.mobile-menu-btn:focus-visible,.mobile-close:focus-visible,summary:focus-visible,a:focus-visible,button:focus-visible{outline:3px solid rgba(63,143,229,.35);outline-offset:2px}.nav-group.active>.nav-trigger{color:var(--blue2)}.mega-menu{position:absolute;left:50%;top:66px;transform:translateX(-50%);width:min(760px,calc(100vw - 40px));display:none;grid-template-columns:1.25fr 1fr .9fr;gap:28px;background:#fff;border:1px solid var(--border);box-shadow:0 20px 50px 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img{position:relative;z-index:2;max-height:430px;object-fit:contain}.section{padding:72px 0}.section.alt{background:var(--pale)}.section-head{display:grid;grid-template-columns:.75fr 1.25fr;gap:30px;margin-bottom:34px}.section-head h2{margin:0;color:var(--title);font-size:clamp(28px,3vw,42px)}.task-rail{display:grid;grid-template-columns:1.2fr .8fr 1fr .8fr 1.2fr;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.task{padding:24px 18px;border-right:1px solid var(--border)}.task:last-child{border-right:0}.task b{display:block;color:var(--title);margin-bottom:8px}.task span{display:block;color:var(--muted);font-size:14px}.mosaic{display:grid;grid-template-columns:1.2fr .8fr 1fr;grid-auto-rows:minmax(170px,auto);gap:18px}.mosaic>article{background:#fff;border:1px solid var(--border);padding:26px;border-radius:16px}.mosaic>article:nth-child(1){grid-row:span 2;background:var(--pale)}.mosaic>article:nth-child(3){grid-column:span 2}.mosaic 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h2{color:var(--title);font-size:30px;margin-top:1.8em;scroll-margin-top:110px}.article-body h3{color:var(--title);font-size:21px;margin-top:1.4em}.article-body p{font-size:16.5px}.article-body ul{padding-left:22px}.toc{position:sticky;top:106px;align-self:start;border-left:2px solid var(--border);padding-left:18px}.toc h2{font-size:15px;color:var(--title);margin-top:0}.toc a{display:block;padding:7px 0;color:var(--muted);font-size:14px}.toc a.active{color:var(--blue2);font-weight:800}.callout{margin:26px 0;background:var(--pale2);border-left:4px solid var(--blue);padding:18px 22px}.risk-callout{margin:26px 0;background:#f7f9fb;border:1px solid var(--border);padding:18px 22px}.checklist{display:grid;grid-template-columns:1fr 1fr;gap:10px 24px;padding:18px 22px;background:var(--pale);border-radius:14px}.mobile-toc{display:none}.site-footer{background:#123958;color:#cfe0ef;padding:56px 0 24px}.footer-grid{width:min(var(--max),calc(100% - 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@media(max-width:640px){.container,.footer-grid,.footer-bottom{width:min(100% - 30px,var(--max))}.safety-bar{text-align:left;font-size:12px;padding:8px 15px}.header-inner{padding:0 15px;gap:10px}.brand img{width:112px}.header-actions{gap:7px}.header-actions>.download-btn{padding:8px 10px;font-size:13px}.lang-switch{font-size:13px}.hero{padding:42px 0 32px}.hero h1{font-size:39px}.hero .sub{font-size:17px}.hero-product{min-height:320px}.section{padding:52px 0}.task-rail{grid-template-columns:1fr}.task{border-right:0}.mosaic{grid-template-columns:1fr}.mosaic>article:nth-child(3){grid-column:auto}.network-panel{grid-template-columns:1fr;padding:20px}.network-panel img{max-height:180px;margin:auto}.security-grid{gap:26px}.update-item{grid-template-columns:1fr;gap:4px}.cta{align-items:flex-start;flex-direction:column}.page-hero{padding:40px 0 24px}.article-shell{padding:36px 0}.article-body h2{font-size:26px}.checklist{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-bottom{width:min(100% - 30px,var(--max))}.pos-grid{grid-template-columns:1fr}.mobile-menu{padding-bottom:max(18px,env(safe-area-inset-bottom))}}