:root{
 --bg:#fff;--soft:#f5f8fc;--soft2:#edf4fb;--brand:#3f8fe5;--brand-dark:#245f9e;--deep:#153f66;
 --title:#16283c;--text:#43566a;--muted:#718296;--border:#dce7f2;--tag:#eaf4ff;--footer:#123958;
 --shadow:0 18px 45px rgba(21,63,102,.09);--radius:22px;--max:1200px
}
*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{margin:0;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.72;overflow-x:hidden}
body.menu-open{overflow:hidden}.container{width:min(calc(100% - 40px),var(--max));margin-inline:auto}.skip-link{position:absolute;left:-9999px;top:8px;z-index:10000;background:#fff;padding:10px 14px;border-radius:8px}.skip-link:focus{left:8px}
a{color:var(--brand-dark);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto;display:block}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.safety-strip{background:var(--soft2);border-bottom:1px solid var(--border);font-size:13px;color:var(--deep)}.safety-strip .container{padding:9px 0}
.site-header{position:sticky;top:0;z-index:500;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid rgba(220,231,242,.8)}.header-inner{height:74px;display:flex;align-items:center;gap:22px}.brand{display:inline-flex;align-items:center;flex:0 0 auto}.brand img{width:145px;height:auto}.desktop-nav{display:flex;align-items:center;gap:2px;flex:1;justify-content:center;min-width:0}.nav-group{position:static}.nav-trigger{appearance:none;border:0;background:transparent;color:var(--title);font:inherit;font-size:14px;font-weight:700;padding:15px 10px;cursor:pointer;white-space:nowrap;border-radius:10px}.nav-trigger:hover,.nav-trigger:focus-visible,.nav-trigger[aria-expanded="true"]{background:var(--soft);outline:none}.nav-trigger span{margin-left:4px;color:var(--muted)}
.mega-menu{position:absolute;left:50%;top:calc(100% - 4px);transform:translateX(-50%) translateY(-8px);width:min(1120px,calc(100vw - 36px));display:grid;grid-template-columns:1.1fr 1.5fr 1fr;gap:34px;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow);padding:28px;border-radius:18px;opacity:0;visibility:hidden;pointer-events:none;transition:.18s ease;z-index:700}.nav-group.open .mega-menu{opacity:1;visibility:visible;pointer-events:auto;transform:translateX(-50%) translateY(0)}
.mega-intro{padding-right:28px;border-right:1px solid var(--border)}.eyebrow{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--brand-dark);font-weight:800;margin:0 0 8px}.mega-intro p:not(.eyebrow){margin:0 0 14px;font-size:14px}.mega-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px 18px}.mega-links a{padding:9px 0;border-bottom:1px solid var(--soft2);color:var(--title);font-weight:700;font-size:14px}.mega-feature{display:flex;flex-direction:column;gap:8px}.mega-feature strong{color:var(--title);font-size:13px}.mega-feature a{padding:10px 12px;background:var(--soft);border-radius:12px;display:flex;justify-content:space-between;gap:8px}.mega-feature span{font-size:13px;font-weight:700;color:var(--title)}.mega-feature small{font-size:11px;color:var(--muted)}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}.lang-link{font-weight:800;font-size:13px;padding:8px}.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:12px;background:var(--brand);color:#fff;font-weight:800;box-shadow:0 8px 18px rgba(63,143,229,.18)}.download-btn:hover{background:var(--brand-dark);text-decoration:none}.download-btn.compact{min-height:40px;padding:0 16px;font-size:13px}.mobile-menu-btn{display:none;min-width:44px;min-height:44px;border:1px solid var(--border);background:#fff;border-radius:10px;font-size:22px}.mobile-menu{position:fixed;inset:0;z-index:1000;background:#fff;overflow:auto}.mobile-menu[hidden]{display:none}.mobile-menu-head{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;padding:14px 20px;z-index:2}.mobile-menu-head>div{display:flex;align-items:center;gap:8px}.mobile-close{width:44px;height:44px;border:1px solid var(--border);background:#fff;border-radius:10px;font-size:28px}.mobile-menu-body{padding:10px 20px}.mobile-accordion{border-bottom:1px solid var(--border)}.mobile-accordion>button{width:100%;min-height:52px;background:#fff;border:0;display:flex;align-items:center;justify-content:space-between;font:inherit;font-weight:800;color:var(--title);text-align:left;touch-action:manipulation}.mobile-accordion-panel{display:none;padding:0 0 14px}.mobile-accordion.open .mobile-accordion-panel{display:grid}.mobile-accordion-panel a{padding:10px 4px;color:var(--text)}.mobile-menu-foot{padding:20px;display:grid;gap:12px;background:var(--soft)}
main{display:block}.section{padding:84px 0}.section.soft{background:var(--soft)}.section.soft2{background:var(--soft2)}.section.deep{background:var(--deep);color:#d9eafb}.section.deep h2,.section.deep h3,.section.deep p,.section.deep li{color:inherit}.section-head{max-width:760px;margin-bottom:34px}.section-head h2,.article-body h2{font-size:clamp(28px,4vw,42px);line-height:1.18;color:var(--title);margin:0 0 14px}.section-head p{font-size:17px;margin:0}.deep .section-head h2{color:#fff}.kicker{font-size:13px;font-weight:800;letter-spacing:.09em;text-transform:uppercase;color:var(--brand-dark);margin-bottom:10px}
.hero{padding:72px 0 64px;background:linear-gradient(180deg,#fff 0,#f8fbff 100%)}.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:60px;align-items:center}.hero-copy h1{font-size:clamp(42px,5.7vw,72px);line-height:1.06;letter-spacing:-.035em;margin:12px 0 18px;color:var(--title);max-width:820px}.hero-sub{font-size:20px;font-weight:700;color:var(--brand-dark);margin-bottom:14px}.hero-copy p{font-size:18px;max-width:720px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 22px}.secondary-btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border:1px solid var(--border);border-radius:12px;color:var(--title);font-weight:800;background:#fff}.secondary-btn:hover{border-color:var(--brand);text-decoration:none}.hero-links{display:flex;gap:18px;flex-wrap:wrap;font-size:14px}.hero-tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:22px}.hero-tags span{background:var(--tag);color:var(--brand-dark);padding:6px 10px;border-radius:8px;font-size:12px;font-weight:700}.hero-visual{position:relative;min-height:560px;display:grid;place-items:center;background:var(--soft2);border-radius:32px;overflow:hidden;border:1px solid var(--border)}.hero-visual:before,.hero-visual:after{content:"";position:absolute;border:1px solid rgba(63,143,229,.25);border-radius:32px;transform:rotate(12deg)}.hero-visual:before{width:330px;height:330px;right:-85px;top:-60px}.hero-visual:after{width:240px;height:240px;left:-80px;bottom:-60px}.hero-visual img{max-height:520px;width:auto;position:relative;z-index:1;filter:drop-shadow(0 24px 30px rgba(21,63,102,.18))}
.task-nav{padding:28px 0 18px}.task-list{display:grid;grid-template-columns:1.25fr .9fr 1.15fr .9fr 1.2fr;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.task-item{padding:24px 20px;position:relative}.task-item+.task-item{border-left:1px solid var(--border)}.task-num{font-size:12px;color:var(--brand);font-weight:800}.task-item h2{font-size:18px;margin:7px 0 7px;color:var(--title)}.task-item p{font-size:13px;margin:0 0 8px;color:var(--muted)}
.mosaic{display:grid;grid-template-columns:1.2fr .8fr .9fr;grid-template-rows:auto auto;gap:18px}.mosaic>article{border:1px solid var(--border);background:#fff;border-radius:var(--radius);padding:28px;overflow:hidden}.mosaic .wide{grid-column:span 2;display:grid;grid-template-columns:1fr .9fr;gap:28px}.mosaic .tall{grid-row:span 2;background:var(--soft)}.mosaic .dark{background:var(--deep);color:#d9eafb}.mosaic .dark h3{color:#fff}.mosaic h3{font-size:24px;color:var(--title);margin:0 0 10px}.mosaic p{margin:0 0 14px}.mosaic ul{padding-left:20px;margin:8px 0}.mosaic img{max-height:260px;margin:auto}
.network-stage{display:grid;grid-template-columns:270px 1fr;gap:30px}.network-tabs{display:flex;flex-direction:column;gap:8px}.network-tab{min-height:52px;text-align:left;padding:0 16px;border:1px solid transparent;background:transparent;border-radius:10px;font:inherit;font-weight:800;color:var(--text);cursor:pointer}.network-tab[aria-selected="true"]{background:#fff;border-color:var(--border);color:var(--brand-dark);box-shadow:0 8px 20px rgba(21,63,102,.06)}.network-panels{background:#fff;border:1px solid var(--border);border-radius:24px;overflow:hidden}.network-panel{display:grid;grid-template-columns:1.05fr .95fr;gap:28px;padding:34px}.network-panel[hidden]{display:none}.network-panel h3{font-size:30px;color:var(--title);margin:0 0 12px}.network-panel img{max-height:290px;margin:auto}
.journey{position:relative;display:grid;gap:0}.journey:before{content:"";position:absolute;left:50%;top:30px;bottom:30px;width:2px;background:var(--border)}.journey-step{width:50%;padding:24px 44px;position:relative}.journey-step:nth-child(even){margin-left:50%}.journey-step:before{content:"";position:absolute;top:38px;width:14px;height:14px;background:var(--brand);border-radius:50%;border:4px solid #fff;box-shadow:0 0 0 1px var(--border)}.journey-step:nth-child(odd):before{right:-8px}.journey-step:nth-child(even):before{left:-8px}.journey-step .num{font-size:13px;color:var(--brand);font-weight:900}.journey-step h3{font-size:21px;color:var(--title);margin:4px 0}.journey-step p{margin:0}
.web3-process{display:grid;grid-template-columns:.85fr 1.15fr;gap:58px;align-items:start}.process-list{counter-reset:flow;display:grid}.process-list li{list-style:none;position:relative;padding:15px 18px 15px 58px;border-bottom:1px solid var(--border);color:var(--title);font-weight:700}.process-list li:before{counter-increment:flow;content:counter(flow,decimal-leading-zero);position:absolute;left:0;top:14px;color:var(--brand);font-weight:900}.process-note{margin-top:18px;padding:18px;border-left:4px solid var(--brand);background:var(--soft2)}
.security-layout{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}.security-layout img{max-height:360px;margin:auto}.security-check{display:grid;gap:10px;margin-top:18px}.security-check div{padding:10px 0;border-bottom:1px solid rgba(255,255,255,.16)}
.editorial{display:grid;grid-template-columns:1.35fr .65fr;gap:42px}.feature-article{padding-right:34px;border-right:1px solid var(--border)}.feature-article h3{font-size:32px;color:var(--title);margin:0 0 12px}.article-index{display:grid;gap:18px}.article-index article{padding-bottom:14px;border-bottom:1px solid var(--border)}.article-index small{color:var(--brand-dark);font-weight:800}.article-index h3{font-size:18px;color:var(--title);margin:4px 0}.article-index p{font-size:14px;margin:0;color:var(--muted)}
.split-knowledge{display:grid;grid-template-columns:1fr 1fr;gap:24px}.knowledge-side{padding:30px;border:1px solid var(--border);border-radius:20px;background:#fff}.knowledge-side h3{font-size:26px;color:var(--title);margin-top:0}.knowledge-side ul{padding-left:20px}
.updates-list{border-top:1px solid var(--border)}.update-row{display:grid;grid-template-columns:150px 1fr auto;gap:24px;align-items:center;padding:19px 0;border-bottom:1px solid var(--border)}.update-row small{color:var(--muted)}.update-row h3{font-size:18px;color:var(--title);margin:0}.update-row p{margin:4px 0 0;font-size:14px}.update-row a{font-weight:800}
.faq-list{border-top:1px solid var(--border)}.faq-item{border-bottom:1px solid var(--border)}.faq-q{width:100%;min-height:60px;display:flex;justify-content:space-between;align-items:center;text-align:left;background:transparent;border:0;font:inherit;font-weight:800;color:var(--title);padding:15px 0;cursor:pointer}.faq-a{padding:0 0 18px;max-width:900px}.faq-a[hidden]{display:none}
.cta{padding:64px 0}.cta-box{background:var(--brand-dark);color:#eaf4ff;border-radius:28px;padding:42px;display:flex;justify-content:space-between;align-items:center;gap:24px}.cta-box h2{color:#fff;font-size:34px;margin:0 0 8px}.cta-box p{margin:0}.cta-box .download-btn{background:#fff;color:var(--brand-dark)}
.page-hero{padding:62px 0 42px;background:var(--soft)}.breadcrumbs{font-size:13px;color:var(--muted);margin-bottom:22px}.breadcrumbs a{color:var(--muted)}.page-hero h1{font-size:clamp(40px,5vw,62px);line-height:1.08;color:var(--title);margin:0 0 16px;max-width:920px}.page-hero .lead{font-size:19px;max-width:860px}.page-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:50px;align-items:start}.article-body{min-width:0}.article-body section{padding:22px 0 32px;scroll-margin-top:110px;border-bottom:1px solid var(--border)}.article-body h2{font-size:32px}.article-body h3{font-size:20px;color:var(--title);margin:24px 0 8px}.article-body p{margin:0 0 16px}.article-body ul,.article-body ol{padding-left:24px}.article-body li{margin:8px 0}.info-note{background:var(--soft2);border-left:4px solid var(--brand);padding:18px 20px;margin:22px 0;border-radius:0 12px 12px 0}.risk-note{background:#f7f9fb;border:1px solid var(--border);padding:20px;border-radius:14px}.toc{position:sticky;top:104px;padding:18px;border-left:1px solid var(--border)}.toc h2{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 10px}.toc a{display:block;padding:7px 0;font-size:13px;color:var(--text)}.toc a.active{color:var(--brand-dark);font-weight:800}.mobile-toc{display:none}
.guide-steps{counter-reset:g;display:grid;gap:14px}.guide-step{counter-increment:g;padding:20px 20px 20px 70px;position:relative;border:1px solid var(--border);border-radius:14px}.guide-step:before{content:counter(g,decimal-leading-zero);position:absolute;left:20px;top:18px;color:var(--brand);font-weight:900}.glossary-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.term{border-bottom:1px solid var(--border);padding:12px 0}.term strong{display:block;color:var(--title)}
.site-footer{background:var(--footer);color:#cfe0ef;padding:58px 0 20px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:46px}.footer-brand img{width:150px;filter:brightness(0) invert(1);margin-bottom:14px}.footer-brand p{font-size:14px}.footer-safe{color:#a9c4dc}.site-footer h2{font-size:14px;color:#fff;margin:0 0 14px}.site-footer a{display:block;color:#cfe0ef;padding:5px 0;font-size:14px}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:38px;padding-top:18px;display:flex;flex-wrap:wrap;gap:14px 28px;align-items:center;font-size:12px}.footer-bottom span:nth-child(2){flex:1;min-width:280px}

@media(max-width:1100px){
 .desktop-nav{display:none}.mobile-menu-btn{display:inline-grid;place-items:center}.header-inner{height:68px}.hero-grid{gap:28px}.mosaic{grid-template-columns:1fr 1fr}.mosaic .tall{grid-row:auto}.mosaic .wide{grid-column:span 2}.footer-grid{grid-template-columns:1.4fr 1fr 1fr}.footer-grid>div:last-child{grid-column:2/4}
}
@media(max-width:800px){
 .container{width:min(calc(100% - 28px),var(--max))}.section{padding:60px 0}.hero{padding:46px 0}.hero-grid,.security-layout,.web3-process,.editorial,.split-knowledge,.page-layout{grid-template-columns:1fr}.hero-copy h1{font-size:44px}.hero-visual{min-height:440px}.hero-visual img{max-height:400px}.task-list{display:flex;overflow-x:auto;scroll-snap-type:x proximity}.task-item{min-width:230px;scroll-snap-align:start}.task-item+.task-item{border-left:1px solid var(--border)}.mosaic{grid-template-columns:1fr}.mosaic .wide{grid-column:auto;grid-template-columns:1fr}.network-stage{grid-template-columns:1fr}.network-tabs{flex-direction:row;overflow-x:auto;padding-bottom:6px}.network-tab{white-space:nowrap;flex:0 0 auto}.network-panel{grid-template-columns:1fr;padding:24px}.journey:before{left:12px}.journey-step,.journey-step:nth-child(even){width:100%;margin-left:0;padding:18px 0 18px 44px}.journey-step:nth-child(odd):before,.journey-step:nth-child(even):before{left:5px;right:auto;top:31px}.feature-article{padding-right:0;border-right:0;border-bottom:1px solid var(--border);padding-bottom:28px}.update-row{grid-template-columns:110px 1fr}.update-row>a{grid-column:2}.cta-box{align-items:flex-start;flex-direction:column}.toc{display:none}.mobile-toc{display:block;margin:0 0 20px;border:1px solid var(--border);border-radius:12px;padding:10px 14px;background:#fff}.mobile-toc summary{font-weight:800;color:var(--title);cursor:pointer}.mobile-toc nav{padding-top:8px}.mobile-toc a{display:block;padding:7px 0}.footer-grid{grid-template-columns:1fr 1fr}.footer-brand{grid-column:span 2}.footer-grid>div:last-child{grid-column:auto}.glossary-list{grid-template-columns:1fr}
}
@media(max-width:520px){
 .safety-strip{font-size:12px}.header-inner{gap:10px}.brand img{width:118px}.header-actions{gap:2px}.header-actions .download-btn.compact{padding:0 10px;min-height:38px}.lang-link{padding:7px}.hero-copy h1{font-size:38px}.hero-sub{font-size:17px}.hero-copy p{font-size:16px}.hero-visual{min-height:360px;border-radius:22px}.hero-visual img{max-height:330px}.hero-actions{display:grid}.hero-actions>a{width:100%}.section-head h2,.article-body h2{font-size:28px}.mosaic>article{padding:22px}.page-hero h1{font-size:38px}.page-hero .lead{font-size:17px}.footer-grid{grid-template-columns:1fr}.footer-brand{grid-column:auto}.footer-grid>div:last-child{grid-column:auto}.footer-bottom{display:grid}.update-row{grid-template-columns:1fr}.update-row>a{grid-column:auto}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}