:root{--bg:#fff;--soft:#f5f8fc;--soft2:#edf4fb;--blue:#3f8fe5;--deep:#245f9e;--navy:#153f66;--title:#16283c;--text:#43566a;--muted:#718296;--line:#dce7f2;--tag:#eaf4ff;--footer:#123958;--max:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:112px}body{margin:0;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;color:var(--text);line-height:1.72;overflow-x:hidden;background:#fff}body.menu-open{overflow:hidden}
a{color:inherit;text-decoration:none}a:hover{color:var(--deep)}img{max-width:100%;height:auto;display:block}button{font:inherit}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:12px;top:-80px;z-index:9999;background:#fff;padding:10px 14px;border:1px solid var(--line)}.skip-link:focus{top:12px}
.safety-strip{background:var(--soft2);color:#315875;text-align:center;padding:8px 16px;font-size:13px;border-bottom:1px solid var(--line)}.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.97);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}.header-inner{height:72px;width:min(var(--max),calc(100% - 40px));margin:auto;display:flex;align-items:center;gap:20px}.brand{display:flex;align-items:center;flex:none}.brand img{width:154px}.desktop-nav{display:flex;align-items:stretch;justify-content:center;gap:3px;flex:1;height:100%}.nav-group{display:flex;align-items:center;position:static}.nav-trigger{border:0;background:transparent;color:var(--title);font-weight:700;padding:12px 10px;border-radius:8px;cursor:pointer}.nav-trigger:hover,.nav-trigger:focus-visible,.nav-group.is-current .nav-trigger{background:var(--soft2);color:var(--deep)}
button:focus-visible,a:focus-visible{outline:3px solid rgba(63,143,229,.28);outline-offset:2px}.mega-menu{position:absolute;left:50%;top:calc(100% - 3px);transform:translateX(-50%);width:min(1120px,calc(100vw - 40px));padding:26px;background:#fff;border:1px solid var(--line);border-radius:15px;box-shadow:0 18px 48px rgba(30,65,95,.14);display:grid;grid-template-columns:1.15fr 1.4fr 1fr;gap:28px}.mega-menu[hidden]{display:none}.mega-intro{padding-right:24px;border-right:1px solid var(--line)}.eyebrow,.kicker{display:block;font-size:12px;font-weight:850;letter-spacing:.08em;text-transform:uppercase;color:var(--blue);margin-bottom:8px}.mega-intro p{margin:8px 0 16px}.mega-intro a{font-weight:750;color:var(--deep)}.mega-links{display:grid;grid-template-columns:1fr 1fr;gap:6px}.mega-links a{padding:9px;border-radius:7px;color:var(--title)}.mega-links a:hover{background:var(--soft)}.mega-featured{background:var(--soft);padding:16px;border-radius:11px}.mega-featured strong{display:block;color:var(--title);margin-bottom:8px}.mega-featured a{display:flex;justify-content:space-between;padding:8px 0;border-bottom:1px solid var(--line)}.mega-featured a:last-child{border:0}.header-actions{display:flex;align-items:center;gap:10px}.lang-switch{font-weight:750;padding:8px}.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 21px;background:var(--deep);color:#fff!important;border-radius:9px;font-weight:800}.download-btn:hover{background:#194d83}.download-btn.compact{min-height:42px;padding:0 17px}.mobile-menu-btn{display:none;width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:9px;padding:10px}.mobile-menu-btn span:not(.sr-only){display:block;height:2px;background:var(--title);margin:4px 0}
.mobile-menu{position:fixed;inset:0;z-index:3000;background:#fff;overflow:auto}.mobile-menu[hidden]{display:none}.mobile-menu-head{height:70px;position:sticky;top:0;background:#fff;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;padding:0 18px}.mobile-menu-head .brand img{width:140px}.mobile-head-actions{display:flex;gap:14px;align-items:center}.mobile-close{width:44px;height:44px;border:0;border-radius:9px;background:var(--soft);font-size:28px}.mobile-menu-body{padding:10px 18px 130px}.mobile-accordion{border-bottom:1px solid var(--line)}.mobile-accordion>button{width:100%;min-height:52px;border:0;background:#fff;display:flex;justify-content:space-between;align-items:center;color:var(--title);font-weight:800;text-align:left}.mobile-accordion>div{padding:0 0 12px}.mobile-accordion>div[hidden]{display:none}.mobile-accordion a{display:block;padding:9px 4px}.mobile-menu-foot{position:fixed;bottom:0;left:0;right:0;background:#fff;border-top:1px solid var(--line);padding:12px 18px;display:flex;gap:15px;align-items:center}.mobile-menu-foot .download-btn{margin-left:auto}
.container{width:min(var(--max),calc(100% - 40px));margin-inline:auto}.section{padding:76px 0}.section.soft{background:var(--soft)}.section.soft2{background:var(--soft2)}.section.dark{background:var(--navy);color:#dceafa}.section.dark h2,.section.dark h3,.section.dark strong{color:#fff}.section-head{max-width:760px;margin-bottom:34px}h1,h2,h3{margin-top:0;color:var(--title);line-height:1.24}h1{font-size:clamp(38px,5vw,64px);letter-spacing:-.035em;margin-bottom:18px}h2{font-size:clamp(28px,3vw,42px);letter-spacing:-.025em;margin-bottom:18px}h3{font-size:21px;margin-bottom:10px}p{margin:0 0 16px}.lead{font-size:18px;max-width:780px;color:#526b82}
.hero{padding:78px 0;background:linear-gradient(120deg,#fff 0 58%,#eef6ff 58% 100%);overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:50px;align-items:center}.hero .subline{font-size:18px;color:var(--deep);font-weight:760}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0 20px}.secondary-link{display:inline-flex;align-items:center;min-height:46px;padding:0 16px;border:1px solid var(--line);background:#fff;border-radius:9px;font-weight:750}.tag-row{display:flex;flex-wrap:wrap;gap:8px}.tag{background:var(--tag);border:1px solid #d6eaff;border-radius:7px;padding:6px 10px;font-size:13px;font-weight:700;color:#2a618d}.hero-visual{min-height:470px;position:relative;display:grid;place-items:center}.hero-visual:before{content:"";position:absolute;inset:8% 4%;background:#eaf4ff;border-radius:32px 8px 32px 8px;transform:rotate(-2deg)}.hero-visual img{position:relative;z-index:2;max-height:490px;width:auto;filter:drop-shadow(0 24px 34px rgba(28,74,118,.16))}
.task-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.task-grid{display:grid;grid-template-columns:1.15fr .9fr 1.05fr .9fr 1.15fr}.task-item{padding:24px 22px;border-right:1px solid var(--line);min-height:160px}.task-item:last-child{border:0}.task-item .num{font-size:12px;color:var(--blue);font-weight:900}.task-item h3{font-size:18px;margin:8px 0}.task-item p{font-size:14px;color:var(--muted)}.task-item a{font-size:14px;font-weight:760;color:var(--deep)}
.mosaic{display:grid;grid-template-columns:1.2fr .8fr .9fr;gap:18px}.piece{border:1px solid var(--line);border-radius:14px;padding:28px;background:#fff;min-height:230px}.piece.large{grid-row:span 2;background:var(--soft2);min-height:500px}.piece img{max-height:215px;margin:12px auto}.piece.large img{max-height:255px}.clean-list{padding:0;list-style:none}.clean-list li{padding:8px 0;border-bottom:1px solid var(--line)}
.network-stage{display:grid;grid-template-columns:260px 1fr;gap:32px}.network-tabs{display:flex;flex-direction:column;gap:8px}.network-tabs button{min-height:48px;border:1px solid var(--line);background:#fff;border-radius:9px;text-align:left;padding:12px 15px;font-weight:750;color:var(--title)}.network-tabs button[aria-selected=true]{background:var(--tag);border-color:#a8cff5;color:var(--deep)}.network-panel{display:grid;grid-template-columns:1.15fr .85fr;gap:28px;align-items:center;background:#fff;border:1px solid var(--line);padding:32px;border-radius:14px;margin-bottom:16px}.network-panel[hidden]{display:none}.network-panel img{max-height:280px;margin:auto}
.steps{position:relative;max-width:980px;margin:auto}.steps:before{content:"";position:absolute;left:50%;top:20px;bottom:20px;width:1px;background:#bcd5ec}.step{position:relative;width:50%;padding:15px 52px 30px 0}.step:nth-child(even){margin-left:50%;padding:15px 0 30px 52px}.step:after{content:"";position:absolute;right:-6px;top:24px;width:11px;height:11px;background:var(--blue);border-radius:50%;box-shadow:0 0 0 6px #fff}.step:nth-child(even):after{left:-5px;right:auto}.step .n{font-size:12px;color:var(--blue);font-weight:900}
.process-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px}.process-flow{border-left:2px solid #b9d7f3;padding-left:28px}.flow-item{position:relative;padding-bottom:20px}.flow-item:before{content:"";position:absolute;left:-35px;top:7px;width:12px;height:12px;border:2px solid var(--blue);border-radius:50%;background:#fff}.notice{padding:18px 20px;border-left:4px solid var(--blue);background:var(--soft2);border-radius:0 10px 10px 0;color:#355b79}
.security-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}.security-visual{padding:26px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.15);border-radius:16px}.security-visual img{max-height:260px;margin:auto}.security-checks span{display:block;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.13)}
.editorial{display:grid;grid-template-columns:1.35fr .65fr;gap:45px}.feature-article{padding-right:40px;border-right:1px solid var(--line)}.article-index article{padding:13px 0;border-bottom:1px solid var(--line)}.article-index small{color:var(--blue);font-weight:760}.article-index h3{font-size:17px;margin:4px 0}.article-index p{font-size:14px;color:var(--muted)}.split-knowledge{display:grid;grid-template-columns:1fr 1fr;gap:24px}.knowledge-pane{padding:30px;background:#fff;border-top:3px solid var(--blue)}
.updates-list{border-top:1px solid var(--line)}.update-row{display:grid;grid-template-columns:140px 1fr auto;gap:18px;padding:20px 0;border-bottom:1px solid var(--line)}.update-row .label{font-size:13px;color:var(--blue);font-weight:800}.update-row h3{font-size:18px;margin:0}
.faq-list{max-width:920px}.faq-item{border-bottom:1px solid var(--line)}.faq-q{width:100%;min-height:58px;border:0;background:transparent;display:flex;align-items:center;justify-content:space-between;text-align:left;color:var(--title);font-weight:780;padding:12px 0}.faq-a{padding:0 0 20px}.faq-a[hidden]{display:none}
.cta{background:var(--deep);color:#dcecff;padding:40px;border-radius:16px;display:flex;align-items:center;justify-content:space-between;gap:30px}.cta h2{color:#fff;margin-bottom:8px}.cta p{margin:0}.cta .download-btn{background:#fff;color:var(--deep)!important}
.inner-hero{padding:56px 0 44px;background:var(--soft)}.breadcrumbs{font-size:13px;color:var(--muted);margin-bottom:18px}.breadcrumbs a{color:var(--deep)}.inner-hero h1{font-size:clamp(34px,4.5vw,54px);max-width:900px}.article-shell{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:54px;align-items:start}.article-body section{padding-bottom:44px;margin-bottom:44px;border-bottom:1px solid var(--line)}.article-body section:last-child{border:0}.article-body p{font-size:17px}.article-body li{margin:8px 0}.principle-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:24px 0}.principle-row div{background:var(--soft);padding:18px;border-radius:9px}.check-list{list-style:none;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:8px 24px}.check-list li{position:relative;padding:8px 0 8px 27px;border-bottom:1px dashed var(--line)}.check-list li:before{content:"✓";position:absolute;left:0;color:var(--deep);font-weight:900}.risk-box{background:#f7fbff;border:1px solid #cfe4f7;padding:20px;border-radius:11px}.related-links{display:flex;flex-wrap:wrap;gap:9px}.related-links a{border:1px solid var(--line);padding:8px 11px;border-radius:8px;font-weight:700}
.toc{position:sticky;top:100px;border-left:2px solid var(--line);padding-left:16px}.toc h2{font-size:14px}.toc a{display:block;padding:6px 0;color:var(--muted);font-size:14px}.toc a.is-active{color:var(--deep);font-weight:760}.toc-mobile{display:none}.glossary-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.term{padding:18px;border-bottom:1px solid var(--line)}.term strong{display:block;color:var(--title);font-size:17px}
.site-footer{background:var(--footer);color:#bfd3e4;padding:56px 0 22px}.footer-grid{width:min(var(--max),calc(100% - 40px));margin:auto;display:grid;grid-template-columns:1.45fr repeat(3,.85fr);gap:40px}.footer-brand img{width:158px;filter:brightness(0) invert(1);margin-bottom:18px}.footer-grid h2{font-size:15px;color:#fff;margin-bottom:12px}.footer-grid a{display:block;padding:5px 0;color:#d0e1ee;font-size:14px}.footer-safety{font-size:14px;color:#e4eff8}.footer-bottom{width:min(var(--max),calc(100% - 40px));margin:36px auto 0;padding-top:18px;border-top:1px solid rgba(255,255,255,.13);display:flex;gap:18px;align-items:center;flex-wrap:wrap;font-size:12px;color:#9fb9ce}.footer-bottom span:nth-child(2){flex:1}.footer-bottom a{color:#d5e7f4}
@media(max-width:1120px){.desktop-nav{display:none}.mobile-menu-btn{display:block}.header-actions{margin-left:auto}.article-shell{grid-template-columns:1fr}.toc{display:none}.toc-mobile{display:block;background:var(--soft);padding:14px 16px;border-radius:10px;margin-bottom:28px}.toc-mobile a{display:block;padding:7px 0}.mosaic{grid-template-columns:1fr 1fr}.piece.large{grid-row:auto}}
@media(max-width:820px){.header-inner{height:64px;width:calc(100% - 30px)}.safety-strip{text-align:left;font-size:12px}.brand img{width:132px}.download-btn.compact{display:none}.container{width:calc(100% - 30px)}.section{padding:58px 0}.hero{padding:54px 0;background:linear-gradient(180deg,#fff 0 57%,#eef6ff 57%)}.hero-grid{grid-template-columns:1fr}.hero-visual{min-height:370px}.task-grid{grid-template-columns:1fr 1fr}.task-item{border-bottom:1px solid var(--line)}.task-item:nth-child(2n){border-right:0}.task-item:last-child{grid-column:1/-1}.network-stage{grid-template-columns:1fr}.network-tabs{flex-direction:row;overflow-x:auto}.network-tabs button{flex:none;white-space:nowrap}.network-panel{grid-template-columns:1fr}.steps:before{left:5px}.step,.step:nth-child(even){width:100%;margin-left:0;padding:10px 0 25px 34px}.step:after,.step:nth-child(even):after{left:0;right:auto;top:17px}.process-layout,.security-layout,.editorial,.split-knowledge{grid-template-columns:1fr}.feature-article{border:0;padding:0}.update-row{grid-template-columns:1fr;gap:5px}.cta{flex-direction:column;align-items:flex-start}.footer-grid{grid-template-columns:1fr 1fr}.principle-row{grid-template-columns:1fr}.check-list{grid-template-columns:1fr}}
@media(max-width:520px){h1{font-size:38px}.hero-visual{min-height:320px}.hero-visual img{max-height:330px}.task-grid,.mosaic,.glossary-grid,.footer-grid{grid-template-columns:1fr}.task-item,.task-item:nth-child(2n){border-right:0}.task-item:last-child{grid-column:auto}.piece{min-height:0}.footer-bottom{flex-direction:column;align-items:flex-start}.mobile-menu-foot>a:not(.download-btn){display:none}}