*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:128px}body{margin:0;font-family:Arial,"Microsoft YaHei",sans-serif;color:#43566a;background:#fff;line-height:1.72;overflow-x:hidden}body.menu-open{overflow:hidden}a{color:inherit}button,input{font:inherit}.wrap{width:min(1180px,calc(100% - 44px));margin:auto}.skip-link{position:fixed;left:16px;top:-80px;z-index:3000;background:#153f66;color:#fff;padding:10px 14px}.skip-link:focus{top:12px}.security-strip{background:#edf4fb;color:#245f9e;text-align:center;padding:9px 20px;font-size:13px;line-height:1.5;border-bottom:1px solid #dce7f2}.site-header{position:sticky;top:0;z-index:1200;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid #dce7f2}.header-row{height:74px;display:flex;align-items:center;gap:28px}.brand{display:inline-flex;align-items:center;flex:0 0 auto}.brand img{display:block;width:138px;max-height:44px;object-fit:contain}.desktop-nav{display:flex;align-items:stretch;justify-content:center;gap:2px;flex:1;height:100%}.mega-wrap{position:static;height:100%;display:flex;align-items:center}.mega-trigger{border:0;background:none;color:#16283c;min-height:44px;padding:0 12px;font-weight:700;cursor:pointer;display:flex;align-items:center;gap:5px}.mega-trigger:hover,.mega-trigger:focus-visible{color:#245f9e;outline:2px solid transparent}.mega-menu{position:absolute;top:73px;left:50%;transform:translateX(-50%);width:min(1080px,calc(100vw - 40px));background:#fff;border:1px solid #dce7f2;box-shadow:0 24px 60px rgba(22,40,60,.12);padding:28px;display:grid;grid-template-columns:1.1fr 1.35fr 1fr;gap:28px}.mega-menu[hidden]{display:none}.mega-intro{padding-right:22px;border-right:1px solid #dce7f2}.mega-intro strong{font-size:20px;color:#16283c}.mega-intro p{font-size:14px}.mega-intro a,.mega-feature a,.mega-links a{text-decoration:none}.mega-intro a{color:#245f9e;font-weight:700}.mega-links{display:grid;grid-template-columns:1fr 1fr;gap:7px 16px;align-content:start}.mega-links a{min-height:44px;display:flex;align-items:center;padding:0 10px;border-bottom:1px solid #edf4fb;color:#16283c}.mega-links a:hover,.mega-links a:focus-visible{background:#f5f8fc;color:#245f9e}.mega-feature>span{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:#718296;margin-bottom:8px}.mega-feature a{display:block;padding:10px 0;border-bottom:1px solid #edf4fb}.mega-feature strong{display:block;color:#16283c}.mega-feature small{display:block;color:#718296}.header-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}.lang-switch{text-decoration:none;font-weight:700;color:#245f9e;min-height:44px;display:inline-flex;align-items:center;padding:0 8px}.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;background:#3f8fe5;color:#fff!important;text-decoration:none;font-weight:700;padding:0 22px;border-radius:10px}.download-btn:hover,.download-btn:focus-visible{background:#245f9e}.download-btn.compact{min-height:42px;padding:0 16px}.mobile-menu-btn{display:none;border:1px solid #dce7f2;background:#fff;width:46px;height:46px;padding:10px;flex-direction:column;justify-content:center;gap:5px;cursor:pointer}.mobile-menu-btn span{display:block;height:2px;background:#16283c}.mobile-menu{position:fixed;inset:0;z-index:2000;background:#fff;overflow:auto;padding:18px 22px 30px}.mobile-menu[hidden]{display:none}.mobile-menu-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:18px;border-bottom:1px solid #dce7f2}.mobile-menu-top>div{display:flex;align-items:center;gap:10px}.mobile-close{border:1px solid #dce7f2;background:#fff;width:46px;height:46px;font-size:30px;cursor:pointer}.mobile-group{border-bottom:1px solid #dce7f2}.mobile-group-toggle{width:100%;min-height:52px;border:0;background:#fff;display:flex;justify-content:space-between;align-items:center;font-weight:700;color:#16283c;padding:0}.mobile-group-links{padding:0 0 12px}.mobile-group-links[hidden]{display:none}.mobile-group-links a{display:block;text-decoration:none;padding:9px 6px;min-height:44px}.mobile-menu-bottom{padding-top:24px;display:grid;gap:10px}.mobile-menu-bottom>a:not(.download-btn){text-decoration:none;min-height:44px;display:flex;align-items:center}.eyebrow{margin:0 0 10px;color:#3f8fe5;text-transform:uppercase;letter-spacing:.09em;font-size:12px;font-weight:800}.hero{padding:68px 0 42px;background:#f5f8fc}.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:52px;align-items:center}.hero h1,.inner-hero h1{font-size:clamp(40px,5.2vw,68px);line-height:1.08;letter-spacing:-.035em;color:#16283c;margin:0 0 16px}.hero-sub{font-size:20px;color:#245f9e;margin:0 0 10px}.hero-copy,.lead{font-size:18px;max-width:780px}.hero-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:28px}.text-link{color:#245f9e;font-weight:700;text-decoration:none}.capability-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}.capability-tags span{background:#eaf4ff;color:#245f9e;padding:5px 10px;border-radius:7px;font-size:13px}.hero-art{min-height:480px;background:#edf4fb;position:relative;display:flex;align-items:flex-end;justify-content:center;padding:34px;overflow:hidden}.hero-art:before,.hero-art:after{content:"";position:absolute;border:1px solid #cfe2f4;width:260px;height:260px;transform:rotate(18deg);top:28px;right:28px}.hero-art:after{width:150px;height:150px;top:auto;right:auto;bottom:40px;left:25px;transform:rotate(45deg)}.hero-art img{position:relative;z-index:1;width:min(390px,100%);max-height:520px;object-fit:contain}.section-pad{padding:82px 0}.section-head{display:flex;justify-content:space-between;align-items:end;gap:40px;margin-bottom:34px}.section-head h2{font-size:clamp(30px,4vw,46px);color:#16283c;line-height:1.12;margin:0}.section-head>p{max-width:520px;margin:0}.task-nav{padding:34px 0;border-bottom:1px solid #dce7f2}.task-row{display:grid;grid-template-columns:1.25fr .9fr 1.05fr .9fr 1.2fr}.task-item{padding:12px 22px;border-right:1px solid #dce7f2}.task-item:first-child{padding-left:0}.task-item:last-child{border:0}.task-item b{color:#3f8fe5}.task-item h2{font-size:19px;color:#16283c;margin:4px 0}.task-item p{font-size:14px;margin:0 0 8px}.mosaic{display:grid;grid-template-columns:1.2fr .9fr 1fr;grid-template-areas:"a b b" "c b d" "c e e";gap:16px}.mosaic article{border:1px solid #dce7f2;padding:28px;min-height:190px;overflow:hidden}.mosaic h3{color:#16283c;font-size:23px;margin-top:0}.mosaic .a{grid-area:a;background:#edf4fb}.mosaic .b{grid-area:b;min-height:440px}.mosaic .b img{width:100%;height:260px;object-fit:contain}.mosaic .c{grid-area:c;background:#153f66;color:#dbeeff}.mosaic .c h3{color:#fff}.mosaic .d{grid-area:d}.mosaic .e{grid-area:e}.network-explorer{display:grid;grid-template-columns:250px 1fr;border:1px solid #dce7f2;min-height:430px}.network-tabs{padding:18px;background:#fff;border-right:1px solid #dce7f2;display:flex;flex-direction:column;gap:4px}.network-tabs button{border:0;background:#fff;text-align:left;min-height:52px;padding:0 14px;color:#43566a;font-weight:700;cursor:pointer}.network-tabs button[aria-selected="true"]{background:#eaf4ff;color:#245f9e}.network-stage{padding:34px}.network-panel{display:grid;grid-template-columns:1fr minmax(240px,36%);gap:34px;align-items:center;padding:12px 0 30px;border-bottom:1px solid #dce7f2}.network-panel[hidden]{display:none}.network-panel img{width:100%;max-height:240px;object-fit:contain}.network-panel h3{font-size:29px;color:#16283c}.journey{position:relative;display:grid;grid-template-columns:repeat(6,1fr);gap:18px}.journey:before{content:"";position:absolute;left:3%;right:3%;top:30px;border-top:1px solid #b8d5ef}.journey article{position:relative;padding:58px 6px 0}.journey article:nth-child(even){padding-top:92px}.journey b{position:absolute;top:10px;left:0;background:#fff;color:#245f9e;border:1px solid #b8d5ef;width:42px;height:42px;display:grid;place-items:center;border-radius:50%}.journey article:nth-child(even) b{top:44px}.journey h3{color:#16283c}.web3-flow{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;align-items:start}.web3-flow h2{font-size:42px;line-height:1.1;color:#16283c}.flow-list{margin:0;padding:0;list-style:none;counter-reset:flow;border-top:1px solid #dce7f2}.flow-list li{counter-increment:flow;padding:16px 0 16px 54px;border-bottom:1px solid #dce7f2;position:relative;font-weight:700;color:#16283c}.flow-list li:before{content:counter(flow,decimal-leading-zero);position:absolute;left:0;color:#3f8fe5}.safe-note{border-left:3px solid #3f8fe5;padding:15px 18px;background:#f5f8fc}.security-feature{background:#153f66;color:#d8e8f7}.security-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center}.security-feature h2{color:#fff;font-size:43px;line-height:1.1}.security-visual img{width:100%;max-height:280px;object-fit:contain;filter:brightness(1.1)}.security-checks{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:18px}.security-checks span{padding:10px;border:1px solid rgba(255,255,255,.18)}.light-link{color:#fff;font-weight:700}.academy-layout{display:grid;grid-template-columns:1.2fr .8fr;gap:60px}.feature-article{padding-right:40px;border-right:1px solid #dce7f2}.feature-article h2{font-size:40px;color:#16283c}.feature-article h3{font-size:25px;color:#245f9e}.article-index article{padding:12px 0;border-bottom:1px solid #dce7f2}.article-index span{font-size:12px;color:#3f8fe5}.article-index h3{margin:2px 0;color:#16283c}.pos-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:30px}.pos-layout article{padding:30px;border-left:3px solid #3f8fe5;background:#fff}.updates{border-top:1px solid #dce7f2}.update-row{display:grid;grid-template-columns:180px 1fr 70px;gap:24px;align-items:center;padding:19px 0;border-bottom:1px solid #dce7f2}.update-row span{font-size:13px;color:#718296}.update-row h3{margin:0;color:#16283c}.update-row a{text-align:right;color:#245f9e}.faq-list{border-top:1px solid #dce7f2}.faq-item{border-bottom:1px solid #dce7f2}.faq-item h2,.faq-item h3{margin:0}.faq-item button{width:100%;min-height:56px;border:0;background:#fff;text-align:left;padding:14px 38px 14px 0;color:#16283c;font-weight:700;cursor:pointer;position:relative}.faq-item button:after{content:"＋";position:absolute;right:4px}.faq-item button[aria-expanded="true"]:after{content:"−"}.faq-answer{padding:0 0 16px;max-width:900px}.faq-answer[hidden]{display:none}.download-cta{padding:0 0 82px}.cta-box{background:#edf4fb;padding:34px 42px;display:flex;align-items:center;justify-content:space-between;gap:30px}.cta-box h2{color:#16283c;margin:0 0 5px}.inner-hero{padding:56px 0;background:#f5f8fc}.inner-hero-layout{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}.inner-hero h1{font-size:clamp(38px,5vw,58px)}.topic-visual{margin:0;min-height:300px;background:#fff;border:1px solid #dce7f2;display:flex;align-items:center;justify-content:center;padding:30px}.topic-visual img{width:100%;max-height:300px;object-fit:contain}.breadcrumbs{display:flex;gap:9px;font-size:13px;color:#718296;margin-bottom:20px}.breadcrumbs a{color:#245f9e}.product-points{display:grid;grid-template-columns:repeat(5,1fr);border-bottom:1px solid #dce7f2}.product-points div{padding:24px 16px;border-right:1px solid #dce7f2}.product-points div:last-child{border:0}.product-points span{display:block;color:#3f8fe5;font-size:12px}.product-points strong{color:#16283c}.prep-strip,.editorial-path{margin-top:42px;padding:28px 0;border-top:1px solid #dce7f2;border-bottom:1px solid #dce7f2;display:grid;grid-template-columns:.9fr 1.1fr;gap:50px}.prep-strip h2,.editorial-path h2{color:#16283c;margin:0}.prep-strip ul,.editorial-path ol{margin:0}.security-principle{background:#153f66;color:#dbeeff;padding:38px 0}.security-principle h2{color:#fff;margin:0 0 10px}.service-context{margin-top:42px;padding:28px 34px;background:#edf4fb;border-left:3px solid #3f8fe5}.service-context h2{color:#16283c;margin:0}.article-shell{padding:60px 0 86px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:60px}.article-body{min-width:0}.prose-section{padding:0 0 34px;margin:0 0 34px;border-bottom:1px solid #dce7f2}.prose-section h2,.check-section h2,.related h2,.notice-box h2{color:#16283c;font-size:30px;line-height:1.2}.prose-section h3{color:#245f9e;font-size:20px}.prose-section p{font-size:17px}.check-list{padding-left:20px}.check-list li{margin:8px 0}.notice-box{background:#edf4fb;border-left:4px solid #3f8fe5;padding:24px 28px;margin:18px 0 36px}.notice-box h2{font-size:22px;margin-top:0}.check-section{padding:6px 0 32px}.related{border-top:1px solid #dce7f2;padding-top:24px}.related div{display:flex;gap:14px;flex-wrap:wrap}.related a{color:#245f9e;text-decoration:none;border-bottom:1px solid #b8d5ef}.toc{position:sticky;top:116px;align-self:start;border-left:1px solid #dce7f2;padding-left:22px}.toc-toggle{width:100%;text-align:left;border:0;background:#fff;font-weight:800;color:#16283c;padding:0 0 10px}.toc nav{display:grid}.toc a{padding:8px 0;color:#718296;text-decoration:none;font-size:14px}.toc a.active{color:#245f9e;font-weight:700}.faq-page{padding-top:50px}.site-footer{background:#123958;color:#c9dced;padding-top:54px}.footer-main{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:46px}.footer-main img{width:140px;max-height:44px;object-fit:contain;filter:brightness(0) invert(1)}.footer-main h2{color:#fff;font-size:16px}.footer-main a{display:block;color:#d8e8f7;text-decoration:none;padding:5px 0}.footer-note{color:#fff}.footer-bottom{margin-top:38px;padding:18px 0;border-top:1px solid rgba(255,255,255,.16);display:flex;justify-content:space-between;gap:20px;font-size:12px;color:#aac2d7}.footer-bottom div{display:flex;gap:16px}.footer-bottom a{color:#fff}.mega-trigger:focus-visible,.lang-switch:focus-visible,.download-btn:focus-visible,.mobile-menu-btn:focus-visible,.mobile-close:focus-visible,.mobile-group-toggle:focus-visible,.network-tabs button:focus-visible,.faq-item button:focus-visible,a:focus-visible{outline:3px solid #9fcdf7;outline-offset:2px}@media(max-width:1120px){.desktop-nav{display:none}.mobile-menu-btn{display:flex}.header-row{height:68px}.header-actions{margin-left:auto}.product-points{grid-template-columns:repeat(3,1fr)}.journey{grid-template-columns:repeat(3,1fr)}.journey:before{display:none}.journey article,.journey article:nth-child(even){padding-top:56px}.journey article:nth-child(even) b{top:10px}}@media(max-width:820px){.wrap{width:min(100% - 32px,1180px)}.hero{padding-top:44px}.hero-grid,.inner-hero-layout,.security-grid,.academy-layout,.web3-flow,.pos-layout,.article-layout,.prep-strip,.editorial-path{grid-template-columns:1fr}.hero-art{min-height:360px;order:2}.task-row{display:block}.task-item{border-right:0;border-bottom:1px solid #dce7f2;padding:18px 0}.mosaic{grid-template-columns:1fr 1fr;grid-template-areas:"a a" "b c" "b d" "e e"}.network-explorer{grid-template-columns:1fr}.network-tabs{flex-direction:row;overflow-x:auto;border-right:0;border-bottom:1px solid #dce7f2;touch-action:pan-x}.network-tabs button{white-space:nowrap;flex:0 0 auto}.network-stage{padding:24px}.network-panel{grid-template-columns:1fr}.journey{grid-template-columns:1fr}.journey article,.journey article:nth-child(even){padding:8px 0 8px 58px}.journey b,.journey article:nth-child(even) b{top:12px}.feature-article{border-right:0;border-bottom:1px solid #dce7f2;padding:0 0 24px}.article-layout{gap:24px}.toc{position:static;order:-1;border-left:0;border:1px solid #dce7f2;padding:15px 18px}.toc nav{display:none}.toc.open nav{display:grid}.footer-main{grid-template-columns:1fr 1fr}.footer-brand{grid-column:1/-1}.footer-bottom{flex-direction:column}.section-head{align-items:start;flex-direction:column}.update-row{grid-template-columns:1fr;gap:3px}.update-row a{text-align:left}.product-points{grid-template-columns:1fr 1fr}.security-checks{grid-template-columns:1fr}.cta-box{align-items:flex-start;flex-direction:column}}@media(max-width:520px){.wrap{width:calc(100% - 28px)}.header-row{gap:8px}.brand img{width:112px}.header-actions{gap:3px}.download-btn.compact{padding:0 12px}.hero h1,.inner-hero h1{font-size:38px}.hero-copy,.lead{font-size:16px}.hero-art{min-height:300px;padding:18px}.mosaic{display:block}.mosaic article{margin-bottom:12px;min-height:auto}.mosaic .b{min-height:auto}.network-stage{padding:18px}.journey{display:block}.section-pad{padding:62px 0}.product-points{grid-template-columns:1fr}.footer-main{grid-template-columns:1fr}.footer-brand{grid-column:auto}.topic-visual{min-height:230px}.prose-section h2{font-size:26px}.article-shell{padding-top:34px}.mobile-menu{padding-left:18px;padding-right:18px}}