*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:#43566a;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.72;overflow-x:hidden}a{color:#245f9e;text-decoration:none}a:hover{text-decoration:underline}img,svg{max-width:100%;height:auto}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:absolute;left:12px;top:-60px;z-index:999;background:#fff;padding:10px 14px;border:2px solid #245f9e}.skip-link:focus{top:12px}.safety-bar{padding:8px 18px;text-align:center;background:#edf4fb;color:#245f9e;font-size:13px;border-bottom:1px solid #dce7f2}.site-header{position:sticky;top:0;z-index:70;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid #dce7f2}.header-inner{max-width:1280px;margin:auto;height:76px;padding:0 24px;display:flex;align-items:center;gap:22px}.brand img{display:block;width:142px;height:auto}.desktop-nav{display:flex;align-items:stretch;gap:2px;flex:1;height:100%;justify-content:center}.nav-group{position:static;display:flex;align-items:center}.nav-trigger{border:0;background:transparent;color:#16283c;font-weight:650;font-size:14px;padding:26px 10px;cursor:pointer}.nav-trigger:focus-visible,.header-actions a:focus-visible,button:focus-visible,a:focus-visible{outline:3px solid rgba(63,143,229,.35);outline-offset:2px}.mega{position:absolute;left:50%;top:76px;transform:translateX(-50%);width:min(1100px,calc(100vw - 48px));background:#fff;border:1px solid #dce7f2;box-shadow:0 18px 45px rgba(21,63,102,.12);display:none;grid-template-columns:1.05fr 1.1fr .9fr;gap:28px;padding:28px;border-radius:0 0 14px 14px}.nav-group.is-open .mega{display:grid}.mega-intro{padding-right:18px;border-right:1px solid #dce7f2}.eyebrow{color:#3f8fe5;font-weight:800;letter-spacing:.04em}.mega-links{display:grid;grid-template-columns:1fr 1fr;gap:8px 16px;align-content:start}.mega-links a{padding:8px 0;color:#16283c;font-weight:600}.mega-feature{background:#f5f8fc;padding:18px}.mega-feature strong{display:block;margin-bottom:10px;color:#16283c}.mega-feature a{display:block;padding:9px 0;border-top:1px solid #dce7f2;font-weight:650}.mega-feature small{display:block;color:#718296;font-weight:400}.header-actions{display:flex;align-items:center;gap:10px;white-space:nowrap}.lang-link{font-weight:700}.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 18px;background:#3f8fe5;color:#fff;border-radius:8px;font-weight:750}.download-btn:hover{background:#245f9e;text-decoration:none}.mobile-open{display:none;width:44px;height:44px;border:1px solid #dce7f2;background:#fff;border-radius:8px;padding:10px;cursor:pointer}.mobile-open span{display:block;height:2px;background:#16283c;margin:5px 0}.mobile-menu{position:fixed;inset:0;z-index:100;background:#fff;display:none;overflow:auto;padding:18px}.mobile-menu.open{display:block}.mobile-menu-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid #dce7f2;padding-bottom:14px}.mobile-menu-head img{width:135px}.mobile-menu-head>div{display:flex;align-items:center;gap:14px}.mobile-close{font-size:32px;border:0;background:none;width:44px;height:44px}.mobile-accordion{width:100%;height:52px;border:0;border-bottom:1px solid #dce7f2;background:#fff;display:flex;justify-content:space-between;align-items:center;font-size:17px;font-weight:750;color:#16283c;text-align:left}.mobile-panel{display:none;padding:6px 0 14px}.mobile-panel.open{display:grid;grid-template-columns:1fr 1fr}.mobile-panel a{padding:10px 6px}.mobile-bottom{margin-top:20px;border-top:1px solid #dce7f2;padding-top:18px;display:grid;gap:10px}body.menu-open{overflow:hidden}.container{width:min(1180px,calc(100% - 40px));margin:auto}.section{padding:80px 0}.section.alt{background:#f5f8fc}.section.blue{background:#153f66;color:#eaf4ff}.section.blue h2,.section.blue h3{color:#fff}.section h2{font-size:clamp(28px,4vw,44px);line-height:1.2;margin:0 0 18px;color:#16283c}.section h3{color:#16283c}.kicker{color:#3f8fe5;font-weight:800;text-transform:uppercase;letter-spacing:.08em;font-size:13px}.hero{padding:70px 0 82px;background:linear-gradient(120deg,#fff 0 62%,#f5f8fc 62%)}.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:center}.hero h1{font-size:clamp(40px,5.6vw,72px);line-height:1.06;margin:14px 0 22px;color:#16283c;letter-spacing:-.025em}.hero-sub{font-size:20px;color:#245f9e;font-weight:700}.hero-copy{font-size:18px;max-width:720px}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin:26px 0}.text-link{display:inline-flex;align-items:center;min-height:44px;font-weight:700}.tags{display:flex;flex-wrap:wrap;gap:8px}.tag{background:#eaf4ff;color:#245f9e;padding:5px 9px;border-radius:6px;font-size:13px}.product-stage{position:relative;min-height:480px;display:flex;justify-content:center;align-items:center;background:#edf4fb;border:1px solid #dce7f2;overflow:hidden}.product-stage:before,.product-stage:after{content:"";position:absolute;border:1px solid #bdd7f0;width:260px;height:260px;transform:rotate(22deg)}.product-stage:after{width:180px;height:180px;right:-40px;bottom:-40px}.product-stage img{position:relative;z-index:2;max-height:440px;width:auto;object-fit:contain}.task-strip{display:grid;grid-template-columns:1.15fr .85fr 1fr .9fr 1.1fr;border-top:1px solid #dce7f2;border-bottom:1px solid #dce7f2}.task{padding:24px 18px;border-right:1px solid #dce7f2}.task:last-child{border:0}.task-num{color:#3f8fe5;font-weight:900}.task h3{margin:5px 0;color:#16283c}.mosaic{display:grid;grid-template-columns:1.3fr .7fr 1fr;grid-template-rows:auto auto;gap:18px}.mosaic>*{border:1px solid #dce7f2;background:#fff;padding:26px;min-height:260px}.mosaic .wide{grid-row:span 2}.mosaic .soft{background:#f5f8fc}.mosaic img{max-height:220px;display:block;margin:18px auto}.network-explorer{display:grid;grid-template-columns:260px 1fr;gap:30px}.network-tabs{display:flex;flex-direction:column;gap:6px}.network-tab{border:0;background:transparent;text-align:left;padding:14px;border-left:3px solid transparent;color:#43566a;font-weight:750;cursor:pointer}.network-tab[aria-selected=true]{border-color:#3f8fe5;background:#eaf4ff;color:#245f9e}.network-panel{padding:28px;background:#fff;border:1px solid #dce7f2}.network-panel-grid{display:grid;grid-template-columns:1fr .8fr;gap:28px;align-items:center}.js .network-panel[hidden]{display:none}.timeline{position:relative;max-width:880px;margin:auto}.timeline:before{content:"";position:absolute;left:50%;top:0;bottom:0;width:1px;background:#bdd7f0}.step{width:48%;padding:20px 24px;margin-bottom:24px;background:#fff;border:1px solid #dce7f2}.step:nth-child(even){margin-left:52%}.step b{color:#3f8fe5;font-size:26px}.flow{display:grid;grid-template-columns:.8fr 1.2fr;gap:56px;align-items:start}.flow-list{counter-reset:flow}.flow-item{position:relative;padding:16px 10px 16px 54px;border-bottom:1px solid #dce7f2}.flow-item:before{counter-increment:flow;content:counter(flow,decimal-leading-zero);position:absolute;left:0;color:#3f8fe5;font-weight:900}.notice{margin-top:24px;border-left:4px solid #3f8fe5;background:#edf4fb;padding:18px 20px;color:#245f9e}.security-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}.checklist{display:grid;gap:10px}.checklist div{padding:13px 0;border-bottom:1px solid rgba(255,255,255,.18)}.checklist div:before{content:"✓";margin-right:10px;color:#8bc5ff;font-weight:900}.academy-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:44px}.feature-article{border-top:4px solid #3f8fe5;padding-top:24px}.feature-article h3{font-size:32px}.article-list{border-left:1px solid #dce7f2;padding-left:24px}.article-list article{padding:0 0 18px;margin-bottom:18px;border-bottom:1px solid #dce7f2}.article-list small{color:#3f8fe5;font-weight:800}.pos-layout{display:grid;grid-template-columns:1fr 1fr;gap:24px}.pos-layout article{padding:30px;border-top:3px solid #3f8fe5;background:#f5f8fc}.updates{max-width:900px}.update-row{display:grid;grid-template-columns:130px 1fr;gap:28px;padding:22px 0;border-top:1px solid #dce7f2}.update-kind{color:#718296;font-size:13px;font-weight:800}.faq-list{max-width:920px}.faq-item{border-top:1px solid #dce7f2}.faq-q{width:100%;background:none;border:0;text-align:left;padding:20px 44px 20px 0;position:relative;font-size:18px;font-weight:750;color:#16283c;cursor:pointer}.faq-q:after{content:"+";position:absolute;right:8px}.faq-q[aria-expanded=true]:after{content:"−"}.faq-a{padding:0 0 20px}.js .faq-a[hidden]{display:none}.cta{padding:50px;background:#edf4fb;display:flex;align-items:center;justify-content:space-between;gap:30px}.page-hero{padding:64px 0 40px;background:#f5f8fc;border-bottom:1px solid #dce7f2}.breadcrumbs{font-size:13px;color:#718296}.page-hero h1{font-size:clamp(36px,5vw,60px);line-height:1.1;color:#16283c;margin:16px 0}.page-hero p{font-size:19px;max-width:780px}.article-wrap{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:54px;align-items:start}.prose{font-size:17px}.prose h2{scroll-margin-top:110px;margin-top:56px;font-size:32px}.prose h3{font-size:21px;margin-top:30px}.prose ul{padding-left:22px}.prose li{margin:8px 0}.toc{position:sticky;top:112px;border-left:2px solid #dce7f2;padding-left:16px}.toc strong{display:block;color:#16283c;margin-bottom:10px}.toc a{display:block;padding:6px 0;font-size:14px}.principles{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:28px 0}.principle{padding:22px;background:#f5f8fc;border-top:3px solid #3f8fe5}.tutorial-steps{counter-reset:tutorial}.tutorial-step{counter-increment:tutorial;display:grid;grid-template-columns:70px 1fr;gap:16px;padding:24px 0;border-top:1px solid #dce7f2}.tutorial-step:before{content:counter(tutorial,decimal-leading-zero);font-size:30px;color:#3f8fe5;font-weight:900}.risk-box{padding:22px;background:#edf4fb;border-left:4px solid #245f9e;margin:26px 0}.service-index{display:grid;grid-template-columns:1fr 1fr;gap:22px}.service-index section{padding:28px;border:1px solid #dce7f2}.mobile-toc{display:none}.footer-grid{max-width:1180px;margin:auto;display:grid;grid-template-columns:1.3fr .8fr .8fr .8fr;gap:38px;padding:56px 20px;color:#d6e6f5}.site-footer{background:#123958}.site-footer h2{font-size:16px;color:#fff}.site-footer a{display:block;color:#d6e6f5;padding:4px 0}.footer-logo{width:140px;background:#fff;padding:6px}.footer-alert{color:#fff;font-weight:700}.footer-bottom{border-top:1px solid rgba(255,255,255,.15);max-width:1180px;margin:auto;padding:20px;display:flex;gap:20px;flex-wrap:wrap;color:#b9cee1;font-size:13px}.footer-bottom a{color:#fff}
@media(max-width:1100px){.desktop-nav{display:none}.mobile-open{display:block}.header-inner{height:68px}.mega{top:68px}.hero-grid,.flow,.security-grid,.academy-layout,.article-wrap{grid-template-columns:1fr}.toc{display:none}.mobile-toc{display:block;margin:24px 0;padding:14px 18px;background:#f5f8fc;border:1px solid #dce7f2}.product-stage{min-height:380px}.task-strip{grid-template-columns:1fr 1fr}.task{border-bottom:1px solid #dce7f2}.mosaic{grid-template-columns:1fr 1fr}.mosaic .wide{grid-row:auto}.network-explorer{grid-template-columns:1fr}.network-tabs{flex-direction:row;overflow-x:auto;padding-bottom:6px}.network-tab{min-width:max-content;border-left:0;border-bottom:3px solid transparent}.network-tab[aria-selected=true]{border-bottom-color:#3f8fe5}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:700px){.safety-bar{text-align:left;font-size:12px;line-height:1.5}.header-inner{padding:0 14px}.brand img{width:118px}.header-actions{gap:7px}.header-actions .download-btn{padding:8px 10px;font-size:13px}.container{width:min(100% - 28px,1180px)}.section{padding:58px 0}.hero{padding:48px 0;background:#fff}.hero-grid{gap:32px}.hero h1{font-size:40px}.hero-copy{font-size:16px}.product-stage{min-height:330px}.product-stage img{max-height:300px}.task-strip{grid-template-columns:1fr}.task{border-right:0}.mosaic{grid-template-columns:1fr}.network-panel-grid{grid-template-columns:1fr}.timeline:before{left:17px}.step,.step:nth-child(even){width:100%;margin-left:0;padding-left:48px}.pos-layout,.service-index,.principles{grid-template-columns:1fr}.update-row{grid-template-columns:1fr;gap:4px}.cta{padding:30px;display:block}.cta .download-btn{margin-top:14px}.page-hero{padding:44px 0 28px}.page-hero h1{font-size:38px}.prose{font-size:16px}.tutorial-step{grid-template-columns:52px 1fr}.footer-grid{grid-template-columns:1fr;padding-top:44px}.footer-bottom{display:grid}.mobile-panel.open{grid-template-columns:1fr}.header-actions .lang-link{font-size:13px}}