:root{--brand:#3f8fe5;--brand2:#245f9e;--deep:#153f66;--title:#16283c;--text:#43566a;--muted:#718296;--border:#dce7f2;--soft:#f5f8fc;--soft2:#edf4fb;--footer:#123958;--max:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{margin:0;font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;color:var(--text);line-height:1.72;overflow-x:hidden}a{color:var(--brand2);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto}button{font:inherit;touch-action:manipulation}.shell{width:min(var(--max),calc(100% - 40px));margin:auto}.skip{position:fixed;top:-80px;left:10px;z-index:3000;background:#fff;padding:10px}.skip:focus{top:10px}.safety{font-size:13px;background:var(--soft2);border-bottom:1px solid var(--border)}.safety .shell{padding:8px 0}.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}.header-row{height:76px;display:flex;align-items:center;gap:22px}.brand{display:inline-flex}.brand img{width:142px;max-height:44px;object-fit:contain}.desktop-nav{flex:1;display:flex;justify-content:center}.mega-wrap{position:static}.mega-trigger{min-height:44px;border:0;background:transparent;padding:10px 9px;color:var(--title);font-weight:700;white-space:nowrap}.mega{position:absolute;left:50%;top:76px;transform:translateX(-50%);width:min(1120px,calc(100vw - 40px));display:grid;grid-template-columns:1.1fr 1fr .9fr;gap:28px;background:#fff;border:1px solid var(--border);box-shadow:0 18px 44px rgba(36,95,158,.12);padding:28px}.mega[hidden]{display:none}.mega-intro{border-right:1px solid var(--border);padding-right:25px}.mega-intro strong{font-size:23px;color:var(--title)}.mega-links{display:grid;grid-template-columns:1fr 1fr;gap:7px 15px}.mega-links a,.mega-feature a{display:block;padding:8px 0;color:var(--title)}.mega-feature{padding:18px;background:var(--soft)}.actions{display:flex;align-items:center;gap:10px}.lang{font-weight:800}.download{display:inline-flex;min-height:48px;align-items:center;justify-content:center;padding:10px 20px;border-radius:10px;background:var(--brand2);color:#fff;font-weight:800}.download:hover{text-decoration:none;background:var(--deep)}.download.small{min-height:42px;padding:8px 14px}.mobile-open{display:none;min-width:44px;min-height:44px;border:1px solid var(--border);background:#fff;border-radius:8px;font-size:20px}.mobile-menu{position:fixed;inset:0;z-index:1000;background:#fff;overflow:auto}.mobile-menu[hidden]{display:none}.mobile-head{height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 20px;border-bottom:1px solid var(--border);position:sticky;top:0;background:#fff}.mobile-close{min-width:44px;min-height:44px;border:0;background:#fff;font-size:34px}.mobile-body{padding:10px 20px}.mgroup{border-bottom:1px solid var(--border)}.macc{width:100%;min-height:52px;border:0;background:#fff;display:flex;align-items:center;justify-content:space-between;font-weight:800;color:var(--title)}.mpanel[hidden]{display:none}.mpanel a{display:block;min-height:44px;padding:10px}.mobile-foot{padding:24px 20px;display:grid;gap:12px}.hero{padding:72px 0;background:linear-gradient(90deg,#fff 0,#fff 58%,#f5f8fc 58%,#f5f8fc 100%)}.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}.hero h1,.page-hero h1{font-size:clamp(38px,5vw,66px);line-height:1.08;letter-spacing:-.03em;color:var(--title);margin:0 0 18px}.subtitle{font-size:20px;color:var(--brand2);font-weight:800}.hero p{font-size:17px}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin:26px 0}.text-link{display:inline-flex;align-items:center;min-height:48px;font-weight:800}.hero-tags{display:flex;flex-wrap:wrap;gap:8px}.hero-tags span{background:#eaf4ff;padding:6px 10px;border-radius:6px;font-size:13px}.hero-visual{min-height:500px;background:var(--soft2);border:1px solid var(--border);display:grid;place-items:center}.hero-visual img{max-height:470px;padding:20px;object-fit:contain}.section{padding:76px 0}.soft{background:var(--soft)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:32px}.section-head h2{font-size:clamp(30px,4vw,46px);line-height:1.15;color:var(--title);margin:6px 0 0}.section-head p{max-width:620px;margin:0}.eyebrow{font-size:12px;text-transform:uppercase;letter-spacing:.08em;font-weight:900;color:var(--brand2)}.task-rail{display:grid;grid-template-columns:1.1fr .9fr 1.2fr .85fr 1.05fr;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}.task{padding:24px 20px;border-right:1px solid var(--border)}.task:last-child{border:0}.task h3{color:var(--title)}.mosaic{display:grid;grid-template-columns:1.25fr .75fr 1fr;gap:16px}.mosaic article{border:1px solid var(--border);padding:28px;background:#fff}.mosaic .wide{grid-column:span 2}.mosaic .tall{grid-row:span 2}.mosaic .visual{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center}.mosaic img{max-height:255px;display:block;margin:auto}.mosaic h3{font-size:24px;color:var(--title);margin-top:0}.network-stage{display:grid;grid-template-columns:280px 1fr;gap:34px}.network-tabs{display:flex;flex-direction:column}.network-tab{min-height:48px;border:0;border-left:3px solid transparent;background:#fff;text-align:left;padding:12px 15px;font-weight:800}.network-tab[aria-selected=true]{background:var(--soft2);border-left-color:var(--brand);color:var(--brand2)}.network-panel{display:grid;grid-template-columns:.9fr 1.1fr;gap:30px;border:1px solid var(--border);padding:24px;align-items:center}.network-panel[hidden]{display:none}.network-panel img{max-height:300px}.steps{position:relative}.steps:before{content:"";position:absolute;left:50%;top:0;bottom:0;width:1px;background:var(--border)}.step{width:50%;padding:18px 42px 18px 0;position:relative}.step:nth-child(even){margin-left:50%;padding:18px 0 18px 42px}.step:after{content:"";position:absolute;right:-6px;top:30px;width:11px;height:11px;border-radius:50%;background:var(--brand)}.step:nth-child(even):after{left:-5px;right:auto}.web3{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px}.flow{counter-reset:f}.flow div{counter-increment:f;border-bottom:1px solid var(--border);padding:15px 15px 15px 58px;position:relative}.flow div:before{content:counter(f,decimal-leading-zero);position:absolute;left:0;color:var(--brand);font-weight:900}.note{background:var(--soft2);border-left:4px solid var(--brand);padding:18px;margin:22px 0}.security-band{background:var(--deep);color:#d8eaf8;padding:76px 0}.security-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:58px;align-items:center}.security-band h2{font-size:44px;line-height:1.12;color:#fff}.security-band a{color:#fff}.security-box{border:1px solid rgba(255,255,255,.2);padding:28px}.security-box img{max-height:210px;display:block;margin:auto}.checklist{list-style:none;padding:0}.checklist li{padding:7px 0 7px 26px;position:relative}.checklist li:before{content:"✓";position:absolute;left:0;color:#9dd0ff;font-weight:900}.editorial{display:grid;grid-template-columns:1.2fr .8fr;gap:40px}.feature{border-top:4px solid var(--brand);padding-top:20px}.feature h3{font-size:34px;line-height:1.2;color:var(--title)}.article-index{border-left:1px solid var(--border);padding-left:28px}.index-item{padding:13px 0;border-bottom:1px solid var(--border)}.pos{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--border)}.pos article{padding:32px}.pos article+article{background:var(--soft);border-left:1px solid var(--border)}.updates{border-top:1px solid var(--border)}.update{display:grid;grid-template-columns:140px 1fr auto;gap:22px;padding:18px 0;border-bottom:1px solid var(--border)}.faq{border-top:1px solid var(--border)}.faq-item{border-bottom:1px solid var(--border)}.faq-q{width:100%;min-height:58px;border:0;background:transparent;text-align:left;display:flex;justify-content:space-between;align-items:center;font-weight:800;color:var(--title)}.faq-a{padding:0 0 18px}.faq-a[hidden]{display:none}.cta{background:var(--soft2);padding:56px 0}.cta-row{display:flex;justify-content:space-between;align-items:center;gap:24px}.cta h2{font-size:36px;color:var(--title);margin:0}.page-hero{padding:60px 0 48px;background:var(--soft)}.page-hero h1{font-size:clamp(36px,5vw,54px)}.crumbs{font-size:14px;color:var(--muted);margin-bottom:14px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:52px;padding:62px 0}.article-body h2{scroll-margin-top:110px;color:var(--title);font-size:31px;margin:52px 0 16px}.article-body h2:first-of-type{margin-top:0}.article-body h3{font-size:21px;color:var(--title)}.article-body p{font-size:16px}.toc{position:sticky;top:105px;align-self:start;border-left:2px solid var(--border);padding-left:18px}.toc h2{font-size:14px;margin-top:0}.toc a{display:block;padding:7px 0;color:var(--muted)}.toc a.active{color:var(--brand2);font-weight:800}.mobile-toc{display:none}.guide{display:grid;gap:16px;margin:24px 0}.guide div{padding:20px 22px;background:var(--soft);border-left:3px solid var(--brand)}.product{display:grid;grid-template-columns:1fr .8fr;gap:36px;align-items:center;margin:24px 0}.product img{max-height:400px;display:block;margin:auto}.warning{border:1px solid var(--border);background:#f7f8fa;padding:18px 20px;margin:24px 0}.footer{background:var(--footer);color:#c9d9e6;padding:52px 0 24px}.footer-grid{display:grid;grid-template-columns:1.6fr .9fr .9fr .9fr;gap:32px}.footer h2{font-size:16px;color:#fff}.footer a{display:block;color:#e2effa;padding:5px 0}.footer-logo img{filter:brightness(0) invert(1)}.footer-bottom{display:grid;grid-template-columns:auto 1fr auto auto;gap:18px;border-top:1px solid rgba(255,255,255,.15);padding-top:20px;margin-top:28px;font-size:13px}.footer-bottom a{display:inline;padding:0}@media(max-width:1100px){.desktop-nav{display:none}.mobile-open{display:inline-flex;align-items:center;justify-content:center}.header-row{height:68px}.task-rail{grid-template-columns:1fr 1fr}.mosaic{grid-template-columns:1fr 1fr}.article-layout{grid-template-columns:1fr}.toc{display:none}.mobile-toc{display:block}}@media(max-width:820px){.shell{width:calc(100% - 28px)}.actions .download{display:none}.hero{background:#fff;padding:48px 0}.hero-grid,.security-grid,.editorial,.web3,.network-stage,.product{grid-template-columns:1fr}.hero-visual{min-height:340px}.hero-visual img{max-height:320px}.section{padding:56px 0}.section-head{display:block}.section-head p{margin-top:12px}.task-rail{grid-template-columns:1fr}.task{border-right:0;border-bottom:1px solid var(--border)}.mosaic{grid-template-columns:1fr}.mosaic .wide{grid-column:span 1}.mosaic .tall{grid-row:auto}.mosaic .visual{grid-template-columns:1fr}.network-tabs{flex-direction:row;overflow-x:auto}.network-tab{white-space:nowrap;border-left:0;border-bottom:3px solid transparent}.network-tab[aria-selected=true]{border-bottom-color:var(--brand)}.network-panel{grid-template-columns:1fr}.steps:before{left:7px}.step,.step:nth-child(even){width:100%;margin-left:0;padding:18px 0 18px 36px}.step:after,.step:nth-child(even):after{left:2px;right:auto}.security-band h2{font-size:36px}.pos{grid-template-columns:1fr}.pos article+article{border-left:0;border-top:1px solid var(--border)}.update{grid-template-columns:1fr;gap:5px}.cta-row{display:block}.cta .download{margin-top:18px}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:span 2}.footer-bottom{grid-template-columns:1fr}}@media(max-width:480px){.shell{width:calc(100% - 24px)}.brand img{width:128px}.hero h1{font-size:36px}.hero-actions{display:grid}.text-link,.hero-actions .download{width:100%}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:span 1}}