*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;color:#43566a;background:#fff;line-height:1.75;overflow-x:hidden}body.menu-open{overflow:hidden}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit}img{max-width:100%;height:auto;display:block}.container{width:min(1180px,calc(100% - 40px));margin:0 auto}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:12px;top:-60px;z-index:9999;background:#16283c;color:#fff;padding:10px 16px;border-radius:8px}.skip-link:focus{top:12px}.security-strip{padding:7px 20px;text-align:center;background:#edf4fb;color:#245f9e;font-size:13px;border-bottom:1px solid #dce7f2}.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid #dce7f2}.header-row{height:76px;display:flex;align-items:center;gap:34px}.brand{display:inline-flex;align-items:center;flex:0 0 auto}.brand img{width:164px;max-height:48px;object-fit:contain}.desktop-nav{display:flex;align-items:stretch;justify-content:center;gap:8px;flex:1;height:100%}.nav-item{display:flex;align-items:center;position:static}.nav-trigger,.nav-simple{height:44px;min-width:64px;border:0;background:transparent;color:#263e55;padding:0 15px;border-radius:9px;cursor:pointer;display:flex;align-items:center;justify-content:center;position:relative}.nav-trigger:after{content:"";position:absolute;left:16px;right:16px;bottom:2px;height:2px;background:#3f8fe5;transform:scaleX(0);transition:.2s}.nav-trigger:hover:after,.nav-trigger:focus:after,.nav-item.active .nav-trigger:after,.nav-simple.active:after{transform:scaleX(1)}.nav-trigger:focus-visible,.nav-simple:focus-visible,.download-btn:focus-visible,.menu-toggle:focus-visible,.menu-close:focus-visible,.faq-question:focus-visible{outline:3px solid rgba(63,143,229,.3);outline-offset:2px}.nav-simple.active{color:#245f9e;background:#eaf4ff}.mega-menu{position:absolute;left:50%;top:76px;transform:translateX(-50%);width:min(1080px,calc(100vw - 40px));background:#fff;border:1px solid #dce7f2;border-radius:0 0 22px 22px;box-shadow:0 20px 45px rgba(42,93,145,.14);padding:28px;display:grid;grid-template-columns:300px 1fr;gap:30px}.mega-menu[hidden]{display:none}.mega-intro{padding:6px 18px 6px 6px;border-right:1px solid #dce7f2}.mega-intro h2{margin:.15em 0 .4em;color:#16283c;font-size:24px}.mega-intro p{margin:0 0 16px}.eyebrow{font-size:13px;font-weight:750;letter-spacing:.08em;color:#3f8fe5;text-transform:uppercase}.text-link{color:#245f9e;font-weight:700}.text-link:hover{text-decoration:underline}.mega-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.mega-links a{padding:16px;border-radius:12px;border:1px solid transparent}.mega-links a:hover,.mega-links a:focus{background:#f5f8fc;border-color:#dce7f2}.mega-links span{display:block;color:#16283c;font-weight:750}.mega-links small{display:block;color:#718296;margin-top:4px}.header-actions{display:flex;align-items:center;gap:10px}.download-btn{display:inline-flex;min-height:46px;align-items:center;justify-content:center;background:#3f8fe5;color:#fff!important;padding:0 22px;border-radius:10px;font-weight:750;box-shadow:0 10px 22px rgba(63,143,229,.22);transition:.2s;touch-action:manipulation;position:relative;z-index:1}.download-btn:hover{background:#2d7fd2;transform:translateY(-1px)}.download-btn.compact{min-height:44px;padding:0 18px}.menu-toggle{display:none;width:46px;height:46px;border:1px solid #dce7f2;background:#fff;border-radius:10px;align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer;touch-action:manipulation}.menu-toggle span:not(.sr-only){width:21px;height:2px;background:#16283c}.mobile-menu{position:fixed;inset:0;z-index:3000;background:#fff;opacity:0;transform:translateY(-10px);transition:.18s;overflow:auto}.mobile-menu.open{opacity:1;transform:none}.mobile-menu[hidden]{display:none}.mobile-menu-head{height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 20px;border-bottom:1px solid #dce7f2;position:sticky;top:0;background:#fff;z-index:1}.menu-close{width:46px;height:46px;border:0;background:#edf4fb;border-radius:12px;font-size:32px;color:#16283c;cursor:pointer}.mobile-menu-body{padding:14px 20px}.mobile-group{border-bottom:1px solid #dce7f2}.mobile-group-trigger{width:100%;min-height:56px;border:0;background:#fff;display:flex;align-items:center;justify-content:space-between;color:#16283c;font-weight:750;text-align:left;cursor:pointer;touch-action:manipulation}.mobile-group-links{padding:0 0 14px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.mobile-group-links[hidden]{display:none}.mobile-group-links a{padding:11px 12px;background:#f5f8fc;border-radius:9px}.mobile-menu-foot{padding:18px 20px 30px;display:grid;gap:12px}.mobile-menu-foot>a:not(.download-btn){padding:8px 0;color:#245f9e}.hero{padding:72px 0 40px;background:linear-gradient(180deg,#f5f8fc 0,#fff 100%)}.hero-grid{display:grid;grid-template-columns:42% 58%;align-items:center;gap:50px}.hero-visual{min-height:510px;border-radius:34px;background:#eaf4ff;display:flex;align-items:center;justify-content:center;padding:34px;position:relative;overflow:hidden}.hero-visual:before,.hero-visual:after{content:"";position:absolute;border-radius:50%;background:rgba(63,143,229,.12)}.hero-visual:before{width:240px;height:240px;left:-80px;bottom:-80px}.hero-visual:after{width:160px;height:160px;right:-50px;top:-40px}.hero-visual img{max-height:440px;position:relative;z-index:1;object-fit:contain}.hero-copy h1{font-size:clamp(40px,5vw,68px);line-height:1.12;color:#16283c;margin:12px 0 18px;letter-spacing:-.035em}.hero-subtitle{font-size:20px;color:#245f9e;font-weight:700;margin:0 0 12px}.hero-copy .lead{font-size:17px}.hero-actions{display:flex;gap:14px;align-items:center;margin:28px 0}.secondary-btn{display:inline-flex;min-height:46px;align-items:center;justify-content:center;padding:0 22px;border:1px solid #b7cce1;color:#245f9e;border-radius:10px;font-weight:700}.capability-tags{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0}.capability-tags span{font-size:13px;background:#eaf4ff;color:#245f9e;padding:6px 10px;border-radius:7px}.hero-links{display:flex;flex-wrap:wrap;gap:18px}.hero-links a{color:#245f9e;font-weight:700}.section{padding:84px 0}.section.alt{background:#f5f8fc}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:34px}.section-heading h2{font-size:clamp(30px,4vw,48px);line-height:1.18;color:#16283c;margin:8px 0}.section-heading p{max-width:640px;margin:0}.task-grid{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid #dce7f2;border-bottom:1px solid #dce7f2}.task-item{padding:28px 24px;border-right:1px solid #dce7f2}.task-item:last-child{border-right:0}.task-number{font-size:13px;color:#3f8fe5;font-weight:800}.task-item h3{color:#16283c;margin:8px 0}.bento-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:minmax(180px,auto);gap:18px}.bento{border:1px solid #dce7f2;border-radius:20px;padding:28px;background:#fff;overflow:hidden;position:relative}.bento h3{color:#16283c;font-size:24px;margin:0 0 10px}.bento.large{grid-column:span 2;grid-row:span 2;background:#edf4fb}.bento.wide{grid-column:span 2;background:#16283c;color:#dceafa}.bento.wide h3{color:#fff}.bento.tall{grid-row:span 2}.bento img{max-height:210px;margin:20px auto 0;object-fit:contain}.process{display:grid;grid-template-columns:repeat(6,1fr);gap:0;position:relative}.process:before{content:"";position:absolute;left:7%;right:7%;top:24px;height:1px;background:#b7cce1}.process-step{padding:0 13px;position:relative}.process-step:nth-child(even){padding-top:78px}.process-step .dot{width:48px;height:48px;border:1px solid #8fb6dc;background:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#245f9e;font-weight:800;position:relative;z-index:1}.process-step h3{color:#16283c;font-size:18px;margin:14px 0 8px}.process-step p{font-size:14px}.network-tabs{border:1px solid #dce7f2;border-radius:22px;overflow:hidden;background:#fff}.tab-list{display:flex;gap:4px;padding:12px;background:#edf4fb;overflow:auto}.tab-list button{flex:0 0 auto;min-height:44px;border:0;border-radius:9px;background:transparent;color:#43566a;padding:0 18px;cursor:pointer}.tab-list button[aria-selected="true"]{background:#fff;color:#245f9e;box-shadow:0 4px 14px rgba(42,93,145,.09);font-weight:750}.tab-panel{padding:40px}.tab-panel[hidden]{display:none}.tab-content{display:grid;grid-template-columns:1fr 320px;gap:40px;align-items:center}.tab-content h3{font-size:32px;color:#16283c;margin:0 0 12px}.tab-content img{max-height:230px;margin:auto}.safety-band{background:#245f9e;color:#d8e9f8;padding:76px 0}.safety-grid{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}.safety-band h2{color:#fff;font-size:44px;line-height:1.2;margin:8px 0 18px}.safety-band .eyebrow{color:#a9d2f6}.safety-visual{display:grid;grid-template-columns:220px 1fr;gap:26px;align-items:center}.safety-visual img{max-height:210px;filter:drop-shadow(0 14px 26px rgba(0,0,0,.12))}.safety-checks{display:grid;gap:12px}.safety-checks div{padding:12px 14px;border:1px solid rgba(255,255,255,.24);border-radius:10px;background:rgba(255,255,255,.06)}.editorial{display:grid;grid-template-columns:1.1fr .9fr;gap:40px}.feature-article{padding:40px;background:#edf4fb;border-radius:20px;min-height:370px;display:flex;flex-direction:column;justify-content:flex-end}.feature-article h3{font-size:36px;line-height:1.25;color:#16283c;margin:10px 0}.article-list{display:grid;border-top:1px solid #dce7f2}.article-row{padding:18px 0;border-bottom:1px solid #dce7f2}.article-row span{font-size:12px;color:#245f9e;font-weight:800}.article-row h3{margin:5px 0;color:#16283c;font-size:19px}.compare-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:22px}.compare-app{border:1px solid #dce7f2;border-radius:22px;padding:34px;background:#fff;display:grid;grid-template-columns:1fr 220px;gap:24px;align-items:center}.phone-silhouette{height:330px;border:9px solid #16283c;border-radius:34px;background:linear-gradient(160deg,#eaf4ff,#f5f8fc);position:relative}.phone-silhouette:before{content:"";position:absolute;width:76px;height:16px;background:#16283c;border-radius:0 0 12px 12px;left:50%;transform:translateX(-50%);top:-1px}.phone-silhouette:after{content:"xxxtoken";position:absolute;inset:70px 24px auto;text-align:center;color:#245f9e;font-weight:800}.compare-web{padding:42px;background:#16283c;color:#dbe8f5;border-radius:22px}.compare-web h3{color:#fff;font-size:30px}.plain-list{padding-left:18px}.knowledge-risk{display:grid;grid-template-columns:1fr 1fr;gap:30px}.knowledge-risk>div{padding:34px;border:1px solid #dce7f2;border-radius:18px}.knowledge-risk h3{font-size:28px;color:#16283c}.timeline{position:relative;margin-left:12px;padding-left:34px}.timeline:before{content:"";position:absolute;left:5px;top:12px;bottom:12px;width:1px;background:#b7cce1}.timeline-item{position:relative;padding:0 0 32px}.timeline-item:before{content:"";position:absolute;left:-34px;top:10px;width:11px;height:11px;background:#3f8fe5;border:4px solid #eaf4ff;border-radius:50%}.timeline-item small{color:#3f8fe5;font-weight:750}.timeline-item h3{color:#16283c;margin:4px 0}.faq-list{border-top:1px solid #dce7f2}.faq-item{border-bottom:1px solid #dce7f2}.faq-question{width:100%;min-height:70px;border:0;background:transparent;display:flex;align-items:center;justify-content:space-between;text-align:left;color:#16283c;font-weight:750;cursor:pointer;padding:16px 4px;touch-action:manipulation}.faq-question:after{content:"＋";font-size:22px;color:#3f8fe5}.faq-question[aria-expanded="true"]:after{content:"−"}.faq-answer{padding:0 48px 24px 4px}.faq-answer[hidden]{display:none}.cta{padding:72px 0;background:#edf4fb}.cta-box{background:#fff;border:1px solid #dce7f2;border-radius:24px;padding:48px;display:flex;align-items:center;justify-content:space-between;gap:40px}.cta-box h2{color:#16283c;font-size:38px;line-height:1.25;margin:0 0 12px}.cta-actions{display:flex;gap:12px;flex:0 0 auto}.inner-hero{padding:56px 0 48px;background:#f5f8fc;border-bottom:1px solid #dce7f2}.breadcrumbs{display:flex;gap:9px;align-items:center;font-size:13px;color:#718296;margin-bottom:28px}.breadcrumbs a{color:#245f9e}.inner-hero-grid{display:grid;grid-template-columns:1fr 360px;gap:60px;align-items:center}.inner-hero h1{font-size:clamp(38px,5vw,58px);line-height:1.12;color:#16283c;margin:8px 0 16px}.inner-hero .lead{font-size:18px;max-width:760px}.inner-hero-visual{margin:0;padding:26px;background:#fff;border:1px solid #dce7f2;border-radius:20px}.inner-hero-visual img{max-height:250px;margin:auto;object-fit:contain}.inner-hero-note{padding:28px;border:1px solid #c9dbea;border-radius:16px;background:#fff}.inner-hero-note strong{color:#16283c}.article-shell{padding:64px 0 90px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:70px;align-items:start}.article-content{min-width:0}.content-section{padding:0 0 38px;margin:0 0 38px;border-bottom:1px solid #dce7f2}.content-section h2,.related-guides h2{font-size:30px;line-height:1.25;color:#16283c;margin:0 0 18px}.content-section p{font-size:16px}.notice-box,.risk-note{padding:22px 24px;border-radius:14px;margin:0 0 36px;background:#eaf4ff;border-left:4px solid #3f8fe5}.notice-box strong,.risk-note strong{color:#16283c}.check-list,.numbered-list{padding-left:22px}.check-list li,.numbered-list li{margin:8px 0}.toc{position:sticky;top:110px;padding:22px;border-left:1px solid #dce7f2}.toc strong{display:block;color:#16283c;margin-bottom:12px}.toc nav{display:grid;gap:7px}.toc a{font-size:14px;color:#718296;padding:6px 10px;border-radius:7px}.toc a:hover,.toc a.current{color:#245f9e;background:#eaf4ff}.related-guides{padding:10px 0 40px}.related-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.related-list a{display:flex;justify-content:space-between;gap:12px;padding:15px 16px;border:1px solid #dce7f2;border-radius:10px;color:#245f9e}.site-footer{background:#163f69;color:#d7e7f5;padding:66px 0 0}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:44px}.footer-brand img{width:170px;filter:brightness(0) invert(1);margin-bottom:18px}.footer-grid h2{font-size:16px;color:#fff;margin:0 0 16px}.footer-grid a{display:block;padding:5px 0;color:#d7e7f5}.footer-grid a:hover{color:#fff}.footer-risk{font-size:13px;color:#b9d0e4}.footer-bottom{margin-top:42px;padding:20px 0;border-top:1px solid rgba(255,255,255,.15);display:flex;gap:24px;justify-content:space-between;font-size:13px}.back-top{margin-left:auto}.archive-filter{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:30px}.archive-filter span{padding:7px 12px;background:#eaf4ff;color:#245f9e;border-radius:7px;font-size:13px}.support-steps{counter-reset:steps;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.support-step{padding:24px;border:1px solid #dce7f2;border-radius:14px}.support-step:before{counter-increment:steps;content:counter(steps,decimal-leading-zero);color:#3f8fe5;font-weight:800}.support-step h3{color:#16283c}.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.contact-card{padding:30px;border:1px solid #dce7f2;border-radius:16px}.contact-card h2{color:#16283c}.contact-card a{color:#245f9e;font-weight:700}
@media(max-width:980px){.desktop-nav{display:none}.menu-toggle{display:flex}.header-row{height:68px;gap:14px}.brand img{width:142px}.hero-grid{grid-template-columns:1fr}.hero-copy{order:1}.hero-visual{order:2;min-height:420px}.task-grid{grid-template-columns:repeat(2,1fr)}.task-item:nth-child(2){border-right:0}.task-item:nth-child(-n+2){border-bottom:1px solid #dce7f2}.bento-grid{grid-template-columns:repeat(2,1fr)}.process{grid-template-columns:repeat(3,1fr);gap:28px}.process:before{display:none}.process-step:nth-child(even){padding-top:0}.editorial,.compare-grid,.safety-grid{grid-template-columns:1fr}.article-layout{grid-template-columns:1fr}.toc{position:static;order:-1;border:1px solid #dce7f2;border-radius:12px}.toc nav{grid-template-columns:repeat(2,1fr)}.inner-hero-grid{grid-template-columns:1fr 300px}.footer-grid{grid-template-columns:repeat(2,1fr)}.support-steps{grid-template-columns:repeat(2,1fr)}}
@media(max-width:680px){.container{width:min(100% - 28px,1180px)}.security-strip{text-align:left;font-size:12px;line-height:1.45}.header-actions .download-btn{padding:0 13px;font-size:14px}.brand img{width:122px}.section{padding:62px 0}.section-heading{display:block}.hero{padding:44px 0 24px}.hero-grid{gap:28px}.hero-copy h1{font-size:39px}.hero-subtitle{font-size:17px}.hero-actions{align-items:stretch;flex-direction:column}.hero-actions a{width:100%}.hero-visual{min-height:360px;padding:24px}.task-grid{grid-template-columns:1fr}.task-item{border-right:0;border-bottom:1px solid #dce7f2}.task-item:last-child{border-bottom:0}.bento-grid{display:block}.bento{margin-bottom:14px}.bento.large,.bento.wide,.bento.tall{min-height:auto}.process{grid-template-columns:1fr}.process-step{padding:0 0 26px 64px!important;border-left:1px solid #b7cce1;margin-left:23px}.process-step .dot{position:absolute;left:-24px;top:0}.tab-panel{padding:24px}.tab-content{grid-template-columns:1fr}.tab-content img{max-height:190px}.safety-band{padding:58px 0}.safety-band h2{font-size:36px}.safety-visual{grid-template-columns:1fr}.safety-visual img{max-height:170px;margin:auto}.editorial{gap:18px}.feature-article{min-height:300px;padding:28px}.feature-article h3{font-size:29px}.compare-app{grid-template-columns:1fr}.phone-silhouette{height:250px}.knowledge-risk{grid-template-columns:1fr}.cta-box{padding:30px;display:block}.cta-box h2{font-size:31px}.cta-actions{flex-direction:column;margin-top:24px}.inner-hero{padding:38px 0}.inner-hero-grid{grid-template-columns:1fr;gap:24px}.inner-hero h1{font-size:38px}.inner-hero-visual{padding:18px}.article-shell{padding:44px 0 64px}.toc nav{grid-template-columns:1fr}.related-list{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr;gap:28px}.footer-bottom{display:grid;gap:8px}.back-top{margin-left:0}.mobile-group-links{grid-template-columns:1fr}.support-steps,.contact-grid{grid-template-columns:1fr}}
