:root{--blue:#3f8fe5;--blue2:#245f9e;--deep:#153f66;--title:#16283c;--text:#43566a;--muted:#718296;--line:#dce7f2;--light:#f5f8fc;--light2:#edf4fb;--footer:#123958}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:105px}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--text);line-height:1.72;overflow-x:hidden}a{color:var(--blue2);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto}.wrap{width:min(1180px,calc(100% - 40px));margin:auto}.skip{position:fixed;top:-60px;left:12px;z-index:9999;background:#fff;padding:10px;border:2px solid var(--blue)}.skip:focus{top:12px}.notice{background:var(--light2);border-bottom:1px solid var(--line);font-size:13px;padding:8px 0}.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.header-row{min-height:72px;display:flex;align-items:center;gap:24px}.brand img{width:132px;display:block}.desktop-nav{display:flex;flex:1;justify-content:center}.nav-group{position:relative}.nav-trigger{min-height:44px;border:0;background:transparent;color:var(--title);font-weight:700;padding:0 10px;cursor:pointer}.nav-trigger:focus-visible,.menu-toggle:focus-visible,.menu-close:focus-visible,.faq-q:focus-visible,.tab-btn:focus-visible{outline:3px solid rgba(63,143,229,.35);outline-offset:2px}.mega{position:absolute;left:50%;top:58px;transform:translateX(-50%);width:min(820px,calc(100vw - 40px));display:grid;grid-template-columns:1.1fr 1fr .8fr;gap:24px;padding:24px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 18px 42px rgba(18,57,88,.11)}.mega[hidden]{display:none}.mega h2{margin:0 0 6px;color:var(--title);font-size:20px}.mega p{margin:0 0 10px}.mega-links{display:grid}.mega-links a{padding:9px;border-radius:8px}.mega-links a:hover{background:var(--light);text-decoration:none}.mega-tip{border-left:1px solid var(--line);padding-left:18px}.actions{display:flex;align-items:center;gap:10px}.lang{min-height:44px;display:inline-flex;align-items:center;padding:0 8px;font-weight:700}.download-btn{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 18px;border-radius:10px;background:var(--blue2);color:#fff;font-weight:750;border:1px solid var(--blue2)}.download-btn:hover{background:var(--deep);text-decoration:none}.menu-toggle,.menu-close{display:none}.mobile-menu[hidden]{display:none}
.hero{padding:68px 0 56px}.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:58px;align-items:center}.eyebrow{font-size:13px;text-transform:uppercase;letter-spacing:.08em;font-weight:800;color:var(--blue2);margin-bottom:14px}.hero h1,.page-hero h1{color:var(--title);line-height:1.1;letter-spacing:-.035em}.hero h1{font-size:clamp(40px,5vw,66px);margin:0 0 18px}.hero-sub{font-size:20px;color:var(--blue2);font-weight:700}.hero-copy{font-size:17px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:24px 0}.secondary{min-height:44px;display:inline-flex;align-items:center;padding:0 8px;border-bottom:1px solid var(--line)}.tags{display:flex;gap:8px;flex-wrap:wrap}.tags span{background:#eaf4ff;border:1px solid #d7e9fb;padding:6px 10px;border-radius:8px;font-size:13px}.product-stage{min-height:560px;display:flex;align-items:flex-end;justify-content:center;background:linear-gradient(135deg,var(--light),var(--light2));border:1px solid var(--line);border-radius:38px 14px;padding:32px;overflow:hidden}.product-stage img{max-height:500px;object-fit:contain}.section{padding:72px 0}.alt{background:var(--light)}.section-head{display:flex;justify-content:space-between;gap:40px;align-items:end;margin-bottom:30px}.section-head h2{margin:0;color:var(--title);font-size:clamp(30px,3vw,44px);line-height:1.18}.section-head p{max-width:650px;margin:0}.task-strip{display:grid;grid-template-columns:1.2fr .9fr 1.1fr .9fr 1.2fr;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.task{padding:24px 18px;border-right:1px solid var(--line)}.task:last-child{border-right:0}.task small{color:var(--blue2);font-weight:800}.task h3{color:var(--title);margin:5px 0}.mosaic{display:grid;grid-template-columns:1.35fr .65fr 1fr;gap:18px}.mosaic article{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px}.mosaic .wide{grid-column:span 2}.mosaic h3{color:var(--title);font-size:24px;margin-top:0}.mosaic img{max-height:220px;object-fit:contain}.network-stage{display:grid;grid-template-columns:240px 1fr;gap:30px}.tabs{display:flex;flex-direction:column;gap:8px}.tab-btn{min-height:50px;text-align:left;border:1px solid transparent;border-radius:10px;background:transparent;padding:0 14px;color:var(--title);cursor:pointer}.tab-btn[aria-selected="true"]{background:#fff;border-color:var(--line);font-weight:800;color:var(--blue2)}.panel{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:20px;padding:28px;margin-bottom:18px}.js .panel[hidden]{display:none}.panel h3{color:var(--title);font-size:30px;margin:0 0 8px}.steps{display:grid;gap:20px}.step{display:grid;grid-template-columns:80px 1fr;gap:22px}.step:nth-child(even){margin-left:14%}.step-num{font-size:28px;color:var(--blue);font-weight:800;border-top:2px solid var(--blue);padding-top:8px}.step h3{margin:0;color:var(--title)}.process{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px}.flow{border-left:2px solid var(--line);padding-left:28px}.flow li{margin:0 0 16px}.note-box{background:var(--light2);border-left:4px solid var(--blue);padding:16px 18px;border-radius:0 10px 10px 0}.security-zone{background:var(--deep);color:#dbeafa}.security-zone h2,.security-zone h3{color:#fff}.security-zone a{color:#fff}.security-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}.security-zone img{background:#fff;border-radius:18px}.checklist{list-style:none;padding:0}.checklist li{padding:5px 0 5px 28px;position:relative}.checklist li:before{content:"✓";position:absolute;left:0;color:#9dd4ff;font-weight:900}.academy{display:grid;grid-template-columns:1.35fr .65fr;gap:45px}.feature{border-top:3px solid var(--blue);padding-top:18px}.feature h3{font-size:32px;color:var(--title);margin:0 0 12px}.article-list{border-left:1px solid var(--line);padding-left:25px}.article-list article{padding:14px 0;border-bottom:1px solid var(--line)}.article-list h3{font-size:18px;margin:4px 0}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px}.knowledge{padding:28px;border-top:3px solid var(--blue);background:#fff}.notice-list{border-top:1px solid var(--line)}.notice-row{display:grid;grid-template-columns:130px 1fr auto;gap:20px;padding:17px 0;border-bottom:1px solid var(--line)}.faq-list{border-top:1px solid var(--line)}.faq-item{border-bottom:1px solid var(--line)}.faq-q{width:100%;min-height:58px;display:flex;justify-content:space-between;align-items:center;border:0;background:transparent;padding:15px 0;text-align:left;color:var(--title);font-weight:750;cursor:pointer}.faq-answer{padding:0 0 16px}.js .faq-answer[hidden]{display:none}.cta{background:var(--light2);border-top:1px solid var(--line)}.cta-inner{padding:44px 0;display:flex;justify-content:space-between;align-items:center;gap:36px}.cta h2{margin:0;color:var(--title)}
.page-hero{padding:58px 0 38px;background:linear-gradient(180deg,var(--light),#fff)}.breadcrumb{font-size:13px;color:var(--muted)}.page-hero h1{font-size:clamp(38px,5vw,58px);margin:12px 0}.lead{font-size:19px;max-width:850px}.article-shell{display:grid;grid-template-columns:minmax(0,1fr) 255px;gap:55px;padding:48px 0 78px}.article-shell h2{color:var(--title);font-size:30px;line-height:1.22;margin:42px 0 12px}.article-shell h3{color:var(--title);font-size:20px}.toc{position:sticky;top:103px;border-left:2px solid var(--line);padding-left:18px}.toc h2{font-size:13px!important;margin:0 0 8px!important;text-transform:uppercase}.toc a{display:block;padding:7px 0;color:var(--muted);font-size:14px}.mobile-toc{display:none}.info-box,.risk-box,.check-box{padding:22px;margin:24px 0;background:var(--light);border:1px solid var(--line);border-radius:14px}.risk-box{border-left:4px solid var(--blue2)}.flow-text{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:24px 0}.flow-text span{background:var(--light);border-top:2px solid var(--blue);padding:12px}.product-intro{display:grid;grid-template-columns:1fr .8fr;gap:35px;align-items:center}.product-intro img{max-height:420px;object-fit:contain}.service-band{display:grid;grid-template-columns:1fr 1fr;gap:18px}.service-band>div{background:var(--light);border-top:3px solid var(--blue);padding:22px}
.footer{background:var(--footer);color:#d3e4f2;padding:56px 0 22px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,.75fr);gap:34px}.footer a{color:#d7e9f8;display:block;padding:5px 0}.footer h2{color:#fff;font-size:15px}.footer-logo{width:132px;filter:brightness(0) invert(1)}.footer-bottom{margin-top:34px;padding-top:18px;border-top:1px solid rgba(255,255,255,.15);display:flex;justify-content:space-between;gap:20px;font-size:13px}.footer-bottom a{display:inline}
.maintenance{min-height:100vh;display:grid;place-items:center;background:var(--light);padding:30px}.maintenance-card{max-width:650px;text-align:center;background:#fff;border:1px solid var(--line);padding:40px;border-radius:18px;box-shadow:0 18px 42px rgba(18,57,88,.1)}
@media(max-width:1100px){.desktop-nav{display:none}.menu-toggle{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border:0;background:transparent;font-size:22px}.mobile-menu{position:fixed;inset:0;z-index:2000;background:#fff;overflow:auto;padding:18px 20px 28px}.mobile-head{display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;background:#fff;padding-bottom:14px;border-bottom:1px solid var(--line)}.mobile-head>div{display:flex;gap:10px;align-items:center}.menu-close{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border:0;border-radius:10px;background:var(--light);font-size:28px}.mobile-body section{border-bottom:1px solid var(--line)}.mobile-group{width:100%;min-height:52px;border:0;background:transparent;display:flex;justify-content:space-between;align-items:center;text-align:left;color:var(--title);font-weight:750}.mobile-body section div{padding-bottom:12px}.mobile-body section div[hidden]{display:none}.mobile-body a,.mobile-foot>a{display:block;min-height:44px;padding:9px 8px}.mobile-foot{padding-top:18px;display:grid;gap:4px}.hero-grid{gap:30px}.mosaic{grid-template-columns:1fr 1fr}.mosaic .wide{grid-column:span 1}.footer-grid{grid-template-columns:1.2fr 1fr 1fr}.footer-grid>div:last-child{grid-column:2/4}}
@media(max-width:768px){.wrap{width:min(100% - 28px,1180px)}.hero{padding:42px 0}.hero-grid,.security-grid,.process,.academy,.two-col,.product-intro,.service-band{grid-template-columns:1fr}.hero h1{font-size:40px}.product-stage{min-height:400px}.product-stage img{max-height:360px}.section{padding:52px 0}.section-head{display:block}.section-head p{margin-top:10px}.task-strip{grid-template-columns:1fr}.task{border-right:0;border-bottom:1px solid var(--line)}.mosaic{grid-template-columns:1fr}.network-stage{grid-template-columns:1fr}.tabs{flex-direction:row;overflow-x:auto;padding-bottom:6px}.tab-btn{white-space:nowrap;flex:0 0 auto}.panel{grid-template-columns:1fr;padding:22px}.step,.step:nth-child(even){margin-left:0;grid-template-columns:58px 1fr}.notice-row{grid-template-columns:100px 1fr}.notice-row a{grid-column:2}.cta-inner{display:block}.cta .download-btn{margin-top:14px}.article-shell{display:block;padding:30px 0 58px}.toc{display:none}.mobile-toc{display:block;border:1px solid var(--line);background:var(--light);padding:12px 15px;border-radius:12px;margin-bottom:26px}.mobile-toc a{display:block;padding:6px 0}.flow-text{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}.footer-bottom{flex-direction:column}}
@media(max-width:430px){.actions .download-btn{font-size:13px;padding:0 10px}.lang{font-size:13px}.hero-actions{display:grid}.hero-actions a{width:100%;justify-content:center}.product-stage{min-height:330px}.product-stage img{max-height:300px}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.notice-row{grid-template-columns:1fr;gap:4px}.notice-row a{grid-column:auto}}

.footer-language{display:flex;gap:14px;align-items:center;padding:4px 0 20px;color:#c8d8e8}.footer-language a{color:#fff;text-decoration:underline;text-underline-offset:3px}
.toc a.active{color:#245f9e;font-weight:700;border-left:2px solid #3f8fe5;padding-left:9px}