:root{
  --bg:#ffffff;--light:#f5f8fc;--light2:#edf4fb;--blue:#3f8fe5;--blue2:#245f9e;
  --deep:#153f66;--title:#16283c;--text:#43566a;--muted:#718296;--border:#dce7f2;--tag:#eaf4ff;--foot:#123958;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;line-height:1.72}
img{max-width:100%;height:auto}
a{color:var(--blue2);text-decoration:none}
a:hover{text-decoration:underline}
button,a{touch-action:manipulation}
button:focus-visible,a:focus-visible{outline:3px solid rgba(63,143,229,.38);outline-offset:3px}
.skip-link{position:absolute;left:-999px;top:0;background:#fff;padding:10px;z-index:9999}.skip-link:focus{left:10px}
.notice{padding:8px 20px;text-align:center;background:var(--light2);color:#315c84;font-size:14px;border-bottom:1px solid var(--border)}
.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.nav-wrap{max-width:1280px;margin:auto;padding:0 24px;min-height:72px;display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;min-width:150px}.brand img{width:138px;display:block}
.desktop-nav{flex:1;display:flex;justify-content:center;gap:2px}.mega{position:relative}
.mega-toggle{border:0;background:none;padding:24px 12px;font-size:15px;color:var(--title);cursor:pointer}
.mega-toggle:hover{color:var(--blue2)}
.mega-panel{position:fixed;left:50%;transform:translateX(-50%) translateY(-8px);top:104px;width:min(1120px,calc(100vw - 48px));display:grid;grid-template-columns:1.2fr 1.5fr .9fr;gap:28px;background:#fff;border:1px solid var(--border);box-shadow:0 18px 42px rgba(25,58,92,.12);padding:28px;opacity:0;visibility:hidden;pointer-events:none;transition:.18s}
.mega.open .mega-panel,.mega:focus-within .mega-panel{opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0)}
.mega-intro strong{font-size:22px;color:var(--title)}.mega-intro p{margin:8px 0 14px}.mega-links{display:grid;grid-template-columns:1fr 1fr;gap:8px 18px}.mega-links a,.mega-feature a{padding:8px 0;color:var(--title)}
.mega-feature{border-left:1px solid var(--border);padding-left:24px;display:flex;flex-direction:column}.mega-feature span{color:var(--muted);font-size:13px;margin-bottom:8px}
.nav-actions{display:flex;align-items:center;gap:10px}.lang{font-weight:700;padding:8px}.download-btn{display:inline-flex;min-height:44px;align-items:center;justify-content:center;background:var(--blue2);color:#fff!important;padding:10px 18px;border-radius:9px;font-weight:700;text-decoration:none!important}
.menu-btn{display:none;border:1px solid var(--border);background:#fff;border-radius:8px;min-height:44px;padding:0 12px}
.hero{max-width:1280px;margin:auto;padding:74px 24px 56px;display:grid;grid-template-columns:1.1fr .9fr;align-items:center;gap:38px}
.eyebrow{display:inline-block;color:var(--blue2);font-weight:700;letter-spacing:.03em}
.hero h1,.article-hero h1{font-size:clamp(38px,5vw,66px);line-height:1.07;color:var(--title);margin:15px 0 18px;letter-spacing:-.03em}
.hero .subtitle{font-size:21px;color:var(--blue2);margin:0 0 12px}.hero p{font-size:18px;max-width:720px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0}.secondary-link{min-height:44px;display:inline-flex;align-items:center;padding:8px 4px}
.capability-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:24px}.capability-tags span{background:var(--tag);padding:6px 10px;border-radius:7px;font-size:13px}
.product-stage{min-height:460px;background:linear-gradient(145deg,var(--light),var(--light2));border:1px solid var(--border);border-radius:28px 12px 28px 12px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.product-stage:before,.product-stage:after{content:"";position:absolute;border:1px solid rgba(63,143,229,.25);border-radius:50%}
.product-stage:before{width:280px;height:280px;right:-120px;top:-70px}.product-stage:after{width:190px;height:190px;left:-90px;bottom:-80px}
.product-stage img{max-height:430px;width:auto;object-fit:contain;position:relative;z-index:2}
.section{padding:74px 24px}.section-inner{max-width:1200px;margin:auto}.section.light{background:var(--light)}.section.deep{background:var(--deep);color:#dfefff}.section.deep h2,.section.deep h3{color:#fff}
.section-title{display:grid;grid-template-columns:.85fr 1.15fr;gap:36px;align-items:end;margin-bottom:36px}.section-title h2{font-size:clamp(30px,4vw,48px);line-height:1.15;margin:0;color:var(--title)}.section-title p{margin:0}
.task-strip{max-width:1200px;margin:0 auto 50px;padding:0 24px;display:grid;grid-template-columns:1.2fr .9fr 1.1fr .9fr 1.2fr;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.task{padding:22px 18px;border-right:1px solid var(--border)}.task:last-child{border-right:0}.task b{display:block;color:var(--title);margin-bottom:6px}
.mosaic{display:grid;grid-template-columns:1.2fr .8fr .8fr;grid-template-rows:auto auto;gap:16px}.mosaic article{background:#fff;border:1px solid var(--border);padding:26px;border-radius:16px}.mosaic .large{grid-row:span 2}.mosaic .wide{grid-column:span 2}.mosaic img{max-height:220px;margin:18px auto 0;display:block}
.network-stage{display:grid;grid-template-columns:260px 1fr;gap:28px}.network-tabs{display:flex;flex-direction:column;gap:6px}.network-tabs button{min-height:48px;border:0;border-left:3px solid transparent;background:transparent;text-align:left;padding:10px 14px;color:var(--text);font-weight:700}.network-tabs button[aria-selected="true"]{background:#fff;border-left-color:var(--blue);color:var(--blue2)}
.network-panel{background:#fff;border:1px solid var(--border);padding:30px;border-radius:16px}.network-panel img{max-height:290px;display:block;margin:20px auto}
.steps{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:28px 70px}.steps:before{content:"";position:absolute;left:50%;top:0;bottom:0;width:1px;background:var(--border)}.step{padding:22px 0}.step:nth-child(even){transform:translateY(40px)}.step span{font-size:13px;color:var(--blue);font-weight:800}.step h3{margin:4px 0;color:var(--title)}
.process{display:grid;grid-template-columns:.8fr 1.2fr;gap:50px}.process-list{counter-reset:p}.process-list div{counter-increment:p;padding:14px 0;border-bottom:1px solid var(--border)}.process-list div:before{content:counter(p,decimal-leading-zero);color:var(--blue);font-weight:800;margin-right:14px}
.security-grid{display:grid;grid-template-columns:1fr .9fr;gap:40px;align-items:center}.security-checks{background:rgba(255,255,255,.08);padding:24px;border:1px solid rgba(255,255,255,.16);border-radius:16px}.security-checks li{margin:10px 0}.security-grid img{max-height:340px;display:block;margin:auto}
.editorial{display:grid;grid-template-columns:1.15fr .85fr;gap:44px}.feature-article{padding-right:28px;border-right:1px solid var(--border)}.article-list article{padding:0 0 18px;margin-bottom:18px;border-bottom:1px solid var(--border)}.article-list small{color:var(--muted)}
.pos-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.pos-grid article{border-top:3px solid var(--blue);padding:26px 0}
.timeline article{display:grid;grid-template-columns:160px 1fr;gap:24px;padding:18px 0;border-bottom:1px solid var(--border)}.timeline small{color:var(--muted)}
.faq-list details{border-bottom:1px solid var(--border);padding:16px 0}.faq-list summary{cursor:pointer;font-weight:700;color:var(--title)}
.cta{max-width:1200px;margin:0 auto 70px;background:var(--light2);padding:38px;border-radius:20px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.article-hero{max-width:1100px;margin:auto;padding:64px 24px 36px}.breadcrumbs{font-size:14px;color:var(--muted);margin-bottom:12px}.article-hero h1{font-size:clamp(36px,5vw,58px)}.article-hero .lead{font-size:19px;max-width:840px}
.article-layout{max-width:1100px;margin:auto;padding:0 24px 80px;display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:54px}.article-body h2{font-size:30px;color:var(--title);margin:44px 0 14px;scroll-margin-top:120px}.article-body h3{font-size:21px;color:var(--title);margin:28px 0 10px}.article-body p{margin:12px 0}.article-body ul{padding-left:22px}.callout{background:var(--light2);border-left:4px solid var(--blue);padding:20px 22px;margin:26px 0}.risk{background:#f7f9fb;border:1px solid var(--border);padding:20px 22px;margin:26px 0}.toc{position:sticky;top:120px;align-self:start;border-left:1px solid var(--border);padding-left:18px}.toc strong{color:var(--title)}.toc a{display:block;padding:7px 0;font-size:14px}.toc a.active{color:var(--blue2);font-weight:700}
.glossary-table{width:100%;border-collapse:collapse}.glossary-table th,.glossary-table td{border-bottom:1px solid var(--border);padding:14px;text-align:left}
.footer{background:var(--foot);color:#d8e6f4;padding:54px 24px 26px}.footer-grid{max-width:1200px;margin:auto;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}.footer h2{color:#fff;font-size:16px}.footer a{display:block;color:#eaf4ff;padding:4px 0}.footer-logo{width:140px;filter:brightness(0) invert(1)}.footer-note{font-size:14px;color:#a8c4df}.footer-bottom{max-width:1200px;margin:34px auto 0;padding-top:20px;border-top:1px solid rgba(255,255,255,.15);display:flex;gap:18px;flex-wrap:wrap;justify-content:space-between;font-size:13px}.footer-bottom a{display:inline}
.mobile-menu{position:fixed;inset:0;background:#fff;z-index:2000;padding:18px 20px;overflow:auto}.mobile-menu[hidden]{display:none}.mobile-menu-top{display:flex;align-items:center;gap:14px}.mobile-menu-top img{width:130px}.mobile-menu-top a:first-child{margin-right:auto}.menu-close{font-size:34px;border:0;background:none;min-width:44px;min-height:44px}.mobile-groups{margin:28px 0}.mobile-groups section{border-bottom:1px solid var(--border)}.mobile-accordion{width:100%;min-height:52px;text-align:left;border:0;background:none;font-size:18px;font-weight:700;color:var(--title)}.mobile-links{display:none;padding:0 0 14px 14px}.mobile-links a{display:block;padding:9px 0}.mobile-accordion[aria-expanded="true"] + .mobile-links{display:block}.mobile-menu-bottom{display:grid;gap:10px;padding-bottom:30px}
@media(max-width:1080px){.desktop-nav{display:none}.menu-btn{display:inline-flex;align-items:center}.nav-wrap{justify-content:space-between}.brand{min-width:0}.hero{grid-template-columns:1fr 1fr}.mosaic{grid-template-columns:1fr 1fr}.mosaic .large{grid-row:auto}.mosaic .wide{grid-column:span 2}}
@media(max-width:820px){
 .notice{font-size:13px;padding:8px 12px}.nav-wrap{padding:0 14px;min-height:64px}.brand img{width:120px}.nav-actions .download-btn{padding:8px 11px}.lang{padding:6px}
 .hero{grid-template-columns:1fr;padding-top:48px}.hero .product-stage{order:2;min-height:360px}.hero h1{font-size:42px}
 .section{padding:56px 18px}.section-title,.process,.security-grid,.editorial,.pos-grid{grid-template-columns:1fr}.feature-article{border-right:0;border-bottom:1px solid var(--border);padding:0 0 25px}
 .task-strip{overflow-x:auto;grid-template-columns:repeat(5,250px);padding:0 18px}.network-stage{grid-template-columns:1fr}.network-tabs{flex-direction:row;overflow-x:auto}.network-tabs button{white-space:nowrap;border-left:0;border-bottom:3px solid transparent}.network-tabs button[aria-selected="true"]{border-bottom-color:var(--blue)}
 .steps{grid-template-columns:1fr;padding-left:22px}.steps:before{left:4px}.step:nth-child(even){transform:none}.mosaic{grid-template-columns:1fr}.mosaic .wide{grid-column:auto}
 .timeline article{grid-template-columns:1fr;gap:4px}.cta{margin:0 18px 50px;display:block}.cta .download-btn{margin-top:18px}
 .article-layout{grid-template-columns:1fr;gap:20px}.toc{position:static;order:-1;border-left:0;border:1px solid var(--border);padding:18px;border-radius:12px}.footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:520px){
 .nav-actions{gap:4px}.brand img{width:108px}.hero{padding-left:18px;padding-right:18px}.hero h1{font-size:36px}.hero .subtitle{font-size:18px}.product-stage{min-height:300px}
 .hero-actions{display:grid;grid-template-columns:1fr}.secondary-link{justify-content:center}.footer-grid{grid-template-columns:1fr}
 .article-hero{padding:42px 18px 26px}.article-layout{padding:0 18px 60px}.article-body h2{font-size:26px}
}