:root{
  --bg:#ffffff;--soft:#f5f8fc;--soft2:#edf4fb;--blue:#3f8fe5;--blue2:#245f9e;
  --deep:#153f66;--text:#16283c;--body:#43566a;--muted:#718296;--line:#dce7f2;
  --tag:#eaf4ff;--footer:#123958;--max:1200px;--shadow:0 16px 44px rgba(21,63,102,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
body{margin:0;background:var(--bg);color:var(--body);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.72;overflow-x:hidden}
body.menu-open{overflow:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue2);text-decoration:none}
a:hover{text-decoration:underline}
button,input{font:inherit}
button{color:inherit}
.shell{width:min(calc(100% - 40px),var(--max));margin-inline:auto}
.skip-link{position:fixed;left:16px;top:-80px;z-index:9999;background:#fff;padding:10px 14px;border:1px solid var(--line);border-radius:8px}
.skip-link:focus{top:12px}
.safety-strip{background:#eef6ff;border-bottom:1px solid #d6e8fb;color:#365b80;font-size:13px}
.safety-strip .shell{padding:8px 0}
.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid rgba(220,231,242,.9)}
.header-inner{height:72px;display:flex;align-items:center;gap:22px}
.brand{display:flex;align-items:center;flex:0 0 auto}
.brand img{object-fit:contain}
.desktop-nav{display:flex;align-items:stretch;justify-content:center;gap:2px;flex:1;height:100%}
.nav-group{position:static;display:flex;align-items:center}
.nav-trigger{border:0;background:transparent;min-height:44px;padding:0 12px;display:flex;align-items:center;gap:5px;cursor:pointer;border-bottom:2px solid transparent}
.nav-trigger:hover,.nav-trigger:focus-visible,.nav-trigger.is-current{color:var(--blue2);border-bottom-color:var(--blue)}
.nav-trigger:focus-visible,.header-actions a:focus-visible,.mobile-menu-button:focus-visible,.mobile-close:focus-visible,
.mobile-accordion button:focus-visible,.faq-q:focus-visible,.network-tab:focus-visible{outline:3px solid rgba(63,143,229,.28);outline-offset:2px}
.mega-menu{position:absolute;left:50%;top:72px;transform:translateX(-50%);width:min(calc(100vw - 40px),1120px);display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:34px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);padding:30px;border-radius:0 0 16px 16px}
.mega-menu[hidden]{display:none}
.mega-intro strong{display:block;color:var(--text);font-size:22px;margin-bottom:8px}
.mega-intro p{margin:0 0 12px;color:var(--muted);font-size:14px}
.mega-links{display:grid;grid-template-columns:1fr 1fr;gap:6px 18px;align-content:start}
.mega-links a,.mega-featured a{padding:7px 0;color:var(--text);font-size:14px}
.mega-featured{padding-left:24px;border-left:1px solid var(--line);display:flex;flex-direction:column;align-items:flex-start}
.mega-featured .eyebrow{color:var(--muted);font-size:12px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:6px}
.mega-featured a{display:flex;gap:14px;justify-content:space-between;width:100%}
.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.language-link{font-weight:700;min-width:34px;text-align:center}
.download-btn{display:inline-flex;min-height:46px;align-items:center;justify-content:center;padding:0 20px;background:var(--blue2);color:#fff;border-radius:9px;font-weight:700;text-decoration:none}
.download-btn:hover{background:var(--deep);text-decoration:none}
.download-btn.compact{min-height:40px;padding:0 15px}
.mobile-menu-button{display:none;width:44px;height:44px;border:0;background:transparent;padding:10px;cursor:pointer}
.mobile-menu-button span{display:block;height:2px;background:var(--text);margin:5px 0}
.mobile-menu{position:fixed;inset:0;z-index:2000;background:#fff}
.mobile-menu[hidden]{display:none}
.mobile-menu-top{height:72px;padding:0 20px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}
.mobile-top-actions{display:flex;align-items:center;gap:12px}
.mobile-close{width:44px;height:44px;border:0;background:transparent;font-size:32px;cursor:pointer}
.mobile-menu-scroll{height:calc(100dvh - 72px);overflow-y:auto;padding:16px 20px 30px}
.mobile-accordion{border-bottom:1px solid var(--line)}
.mobile-accordion>button{width:100%;height:52px;border:0;background:#fff;display:flex;align-items:center;justify-content:space-between;text-align:left;font-weight:700;cursor:pointer}
.mobile-accordion>div{padding:0 0 12px 16px}
.mobile-accordion>div[hidden]{display:none}
.mobile-accordion a{display:block;min-height:44px;padding:10px 0;color:var(--body)}
.mobile-menu-bottom{display:grid;gap:6px;padding-top:24px}
.mobile-menu-bottom .download-btn{margin-top:8px;color:#fff}
.hero{padding:76px 0 60px;background:linear-gradient(90deg,#fff 0,#fff 58%,#f3f8fe 58%,#f3f8fe 100%)}
.hero-grid{display:grid;grid-template-columns:1.18fr .82fr;gap:54px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--blue2);font-size:13px;font-weight:800;letter-spacing:.07em;text-transform:uppercase}
.hero h1,.page-hero h1{margin:10px 0 18px;color:var(--text);font-size:clamp(40px,5vw,68px);line-height:1.05;letter-spacing:-.03em}
.hero .subhead{font-size:21px;color:var(--blue2);font-weight:700;margin:0 0 12px}
.hero p.lead{font-size:18px;max-width:720px;margin:0 0 24px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 20px}
.text-link{display:inline-flex;min-height:44px;align-items:center;padding:0 8px;font-weight:700}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px}
.hero-tags span{background:var(--tag);border:1px solid #d7eafd;border-radius:6px;padding:5px 9px;font-size:12px;color:#37688f}
.hero-visual{position:relative;min-height:470px;display:flex;align-items:center;justify-content:center}
.hero-visual:before,.hero-visual:after{content:"";position:absolute;border:1px solid #cfe3f8;border-radius:24px}
.hero-visual:before{inset:10% 0 8% 12%;transform:rotate(-5deg)}
.hero-visual:after{inset:17% 9% 0 0;transform:rotate(5deg)}
.hero-visual img{position:relative;z-index:2;max-height:460px;object-fit:contain;filter:drop-shadow(0 30px 40px rgba(36,95,158,.18))}
.task-strip{padding:26px 0;border-bottom:1px solid var(--line)}
.task-row{display:grid;grid-template-columns:1.25fr 1fr 1.1fr 1fr 1.25fr}
.task-item{padding:15px 22px;border-left:1px solid var(--line)}
.task-item:first-child{border-left:0;padding-left:0}
.task-item:nth-child(3){background:var(--soft);border-radius:10px}
.task-num{display:block;font-size:12px;color:var(--blue);font-weight:800}
.task-item h2{font-size:17px;color:var(--text);margin:3px 0 6px}
.task-item p{font-size:13px;line-height:1.55;margin:0 0 6px;color:var(--muted)}
.section{padding:78px 0}
.section.soft{background:var(--soft)}
.section.soft2{background:var(--soft2)}
.section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:32px}
.section-head h2{font-size:clamp(30px,4vw,46px);line-height:1.12;color:var(--text);margin:0}
.section-head p{max-width:650px;margin:0}
.mosaic{display:grid;grid-template-columns:1.25fr .75fr 1fr;grid-template-rows:auto auto;gap:18px}
.mosaic-item{border:1px solid var(--line);background:#fff;padding:28px;min-height:210px}
.mosaic-item.large{grid-row:span 2;min-height:440px;background:#f8fbff}
.mosaic-item.wide{grid-column:span 2}
.mosaic-item h3{color:var(--text);font-size:24px;margin:12px 0 8px}
.mosaic-item p{margin:0}
.mosaic-item img{max-height:210px;margin:12px auto 0;object-fit:contain}
.network-stage{display:grid;grid-template-columns:280px 1fr;gap:34px;align-items:start}
.network-tabs{display:flex;flex-direction:column;border-left:2px solid var(--line)}
.network-tab{border:0;background:transparent;text-align:left;padding:14px 18px;cursor:pointer;color:var(--body);font-weight:700}
.network-tab[aria-selected="true"]{background:#eef6ff;color:var(--blue2);border-left:3px solid var(--blue);margin-left:-2px}
.network-panels{position:relative}
.network-panel{display:grid;grid-template-columns:1.25fr .75fr;gap:28px;align-items:center;padding:30px;border:1px solid var(--line);background:#fff}
.network-panel[hidden]{display:none}
.no-js .network-panel{display:grid!important}
.network-panel img{max-height:260px;margin:auto}
.steps{position:relative;max-width:940px;margin:0 auto}
.steps:before{content:"";position:absolute;left:50%;top:0;bottom:0;width:1px;background:var(--line)}
.step{display:grid;grid-template-columns:1fr 72px 1fr;align-items:center;margin:0 0 12px}
.step .step-content{padding:20px 28px;border-top:1px solid var(--line)}
.step:nth-child(even) .step-content{grid-column:3}
.step:nth-child(odd) .step-content{grid-column:1;text-align:right}
.step .num{grid-column:2;grid-row:1;background:#fff;border:1px solid var(--line);width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:auto;color:var(--blue2);font-weight:800}
.step:nth-child(even) .num{grid-column:2}
.step h3{margin:0 0 6px;color:var(--text)}
.step p{margin:0}
.web3-flow{display:grid;grid-template-columns:.85fr 1.15fr;gap:70px;align-items:start}
.flow-list{counter-reset:flow;border-left:1px solid var(--line);padding-left:28px}
.flow-list li{list-style:none;position:relative;padding:0 0 24px 18px}
.flow-list li:before{counter-increment:flow;content:counter(flow,decimal-leading-zero);position:absolute;left:-48px;top:0;width:40px;height:28px;background:#fff;color:var(--blue2);font-weight:800}
.security-band{background:var(--deep);color:#dbeaff;padding:78px 0}
.security-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.security-band h2{color:#fff;font-size:clamp(32px,4vw,50px);margin:0 0 18px}
.security-band a{color:#fff}
.security-checks{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.15);padding:28px}
.security-checks img{max-height:180px;margin:0 auto 20px;filter:brightness(0) invert(1);opacity:.9}
.security-checks ul{margin:0;padding-left:22px}
.editorial{display:grid;grid-template-columns:1.2fr .8fr;gap:44px}
.feature-story{padding-right:34px;border-right:1px solid var(--line)}
.feature-story h3{font-size:30px;line-height:1.2;color:var(--text);margin:10px 0 14px}
.article-index{display:grid;gap:18px}
.article-index article{padding-bottom:16px;border-bottom:1px solid var(--line)}
.article-index h3{font-size:18px;color:var(--text);margin:4px 0}
.article-index p{font-size:14px;margin:0;color:var(--muted)}
.staking-split{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line)}
.staking-split>article{background:#fff;padding:34px}
.staking-split h3{color:var(--text);font-size:27px;margin-top:0}
.updates-list{border-top:1px solid var(--line)}
.update-row{display:grid;grid-template-columns:150px 1fr auto;gap:20px;padding:20px 0;border-bottom:1px solid var(--line);align-items:start}
.update-tag{color:var(--muted);font-size:13px}
.update-row h3{font-size:18px;margin:0 0 6px;color:var(--text)}
.update-row p{margin:0}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;display:flex;justify-content:space-between;gap:18px;align-items:center;min-height:60px;text-align:left;border:0;background:#fff;padding:14px 0;color:var(--text);font-weight:800;cursor:pointer}
.faq-a{padding:0 34px 18px 0}
.faq-a[hidden]{display:none}
.download-cta{padding:70px 0;background:#f1f7fd}
.download-cta-grid{display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center}
.download-cta h2{font-size:38px;color:var(--text);margin:0 0 8px}
.page-hero{padding:64px 0 48px;background:linear-gradient(180deg,#f6faff,#fff)}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:18px}
.breadcrumb a{color:var(--muted)}
.page-hero h1{font-size:clamp(38px,5vw,58px);max-width:920px}
.page-hero .summary{font-size:18px;max-width:840px;margin:0}
.article-wrap{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:54px;padding:58px 0 84px}
.article-main{min-width:0}
.article-main section{scroll-margin-top:100px;margin:0 0 48px}
.article-main h2{font-size:30px;line-height:1.18;color:var(--text);margin:0 0 16px}
.article-main h3{font-size:20px;color:var(--text);margin:24px 0 10px}
.article-main p{margin:0 0 16px}
.article-main ul,.article-main ol{padding-left:22px}
.article-main li{margin-bottom:8px}
.note{border-left:4px solid var(--blue);background:#eef6ff;padding:18px 20px;margin:24px 0}
.note.dark{background:#f1f5f8;border-left-color:var(--deep)}
.safety-layout .note{border-left-color:#245f9e}
.tutorial-checklist{background:var(--soft);padding:22px 26px;margin:28px 0}
.tutorial-checklist li{margin-bottom:10px}
.term-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.term{border-top:1px solid var(--line);padding:14px 0}
.term strong{display:block;color:var(--text)}
.toc{position:sticky;top:104px;align-self:start;border-left:1px solid var(--line);padding-left:20px}
.toc strong{display:block;color:var(--text);margin-bottom:8px}
.toc a{display:block;padding:5px 0;color:var(--muted);font-size:13px}
.toc a.active{color:var(--blue2);font-weight:800}
.mobile-toc{display:none;margin:0 0 28px;border:1px solid var(--line)}
.mobile-toc summary{padding:12px 14px;font-weight:800;color:var(--text);cursor:pointer}
.mobile-toc nav{padding:0 14px 12px}
.mobile-toc a{display:block;padding:6px 0}
.service-index{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:26px}
.service-index article{border-top:3px solid var(--blue);padding:22px;background:var(--soft)}
.service-index h3{margin-top:0;color:var(--text)}
.site-footer{background:var(--footer);color:#cbdbea;padding:58px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:44px}
.site-footer h2{font-size:15px;color:#fff;margin:0 0 12px}
.site-footer a{display:block;color:#d9e9f6;padding:5px 0}
.footer-brand img{filter:brightness(0) invert(1);opacity:.98}
.footer-brand p{max-width:360px}
.footer-safety{color:#9fc0d9;font-size:13px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:38px;padding-top:20px;display:grid;grid-template-columns:auto 1fr auto auto;gap:18px;align-items:center;font-size:12px;color:#9fc0d9}
.footer-lang{display:flex;gap:6px}
.footer-lang a{display:inline;padding:0}
.back-top{white-space:nowrap}
@media(max-width:1100px){
  .desktop-nav{display:none}.mobile-menu-button{display:block}
  .hero{background:linear-gradient(180deg,#fff 0,#fff 54%,#f3f8fe 54%,#f3f8fe 100%)}
  .hero-grid{grid-template-columns:1fr}.hero-visual{min-height:390px}
  .task-row{grid-template-columns:1fr 1fr 1fr}.task-item{border-top:1px solid var(--line)}
  .mosaic{grid-template-columns:1fr 1fr}.mosaic-item.large{grid-row:auto}.mosaic-item.wide{grid-column:span 2}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
  .footer-grid>div:last-child{grid-column:2}
}
@media(max-width:820px){
  .shell{width:min(calc(100% - 28px),var(--max))}
  .safety-strip .shell{padding:7px 0;line-height:1.45}
  .header-inner{height:64px}.site-header .brand img{width:136px}
  .header-actions{gap:6px}.download-btn.compact{min-height:38px;padding:0 11px;font-size:13px}
  .hero{padding:50px 0 40px}.hero-grid{gap:26px}.hero h1{font-size:42px}.hero .subhead{font-size:18px}
  .hero-visual{min-height:320px}.hero-visual img{max-height:320px}
  .task-row{grid-template-columns:1fr 1fr}.task-item{padding:16px 14px}.task-item:first-child{padding-left:14px}
  .section{padding:58px 0}.section-head{display:block}.section-head p{margin-top:12px}
  .mosaic{grid-template-columns:1fr}.mosaic-item,.mosaic-item.large{min-height:auto}.mosaic-item.wide{grid-column:auto}
  .network-stage{grid-template-columns:1fr}.network-tabs{flex-direction:row;overflow-x:auto;border-left:0;border-bottom:1px solid var(--line);scrollbar-width:thin}
  .network-tab{white-space:nowrap;border-bottom:3px solid transparent}.network-tab[aria-selected="true"]{border-left:0;border-bottom-color:var(--blue);margin-left:0}
  .network-panel{grid-template-columns:1fr;padding:22px}
  .steps:before{left:24px}.step{grid-template-columns:48px 1fr;margin-bottom:8px}
  .step .num,.step:nth-child(even) .num{grid-column:1;grid-row:1}.step .step-content,.step:nth-child(even) .step-content,.step:nth-child(odd) .step-content{grid-column:2;grid-row:1;text-align:left;padding:14px 0 20px 16px}
  .web3-flow,.security-grid,.editorial{grid-template-columns:1fr;gap:32px}
  .feature-story{padding-right:0;border-right:0;border-bottom:1px solid var(--line);padding-bottom:26px}
  .staking-split{grid-template-columns:1fr}
  .update-row{grid-template-columns:1fr auto}.update-row>div:nth-child(2){grid-column:1/-1;grid-row:2}
  .download-cta-grid{grid-template-columns:1fr}
  .article-wrap{grid-template-columns:1fr;padding-top:30px;gap:0}.toc{display:none}.mobile-toc{display:block}
  .service-index{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:last-child{grid-column:auto}
  .footer-brand{grid-column:1/-1}.footer-bottom{grid-template-columns:1fr 1fr}.footer-bottom>span:nth-child(2){grid-column:1/-1}
}
@media(max-width:520px){
  .shell{width:min(calc(100% - 24px),var(--max))}
  .language-link{font-size:13px}.download-btn.compact{padding:0 9px}
  .hero h1{font-size:36px}.hero p.lead{font-size:16px}.hero-actions{display:grid;grid-template-columns:1fr 1fr}.hero-actions .download-btn{grid-column:1/-1}
  .task-row{grid-template-columns:1fr}.task-item{border-left:0}.task-item:nth-child(3){border-radius:0}
  .page-hero{padding:42px 0 32px}.page-hero h1{font-size:36px}.page-hero .summary{font-size:16px}
  .term-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}.footer-brand{grid-column:auto}.footer-bottom{grid-template-columns:1fr}
  .footer-bottom>span:nth-child(2){grid-column:auto}
}