:root{--paper:#F4F1E8;--paper2:#ECE8DD;--white:#FFFDF7;--ink:#111111;--text:#1D1D1D;--muted:#62605B;--soft:#89867E;--lime:#D7FF32;--acid:#B9F227;--blue:#2457FF;--orange:#FF5938;--dark:#161616;--line:rgba(17,17,17,.22);--strong:rgba(17,17,17,.72);--max:1280px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.78;overflow-x:hidden}body.menu-open{overflow:hidden}img{max-width:100%;height:auto;display:block}a{color:inherit}button,input,textarea{font:inherit}.site-header{position:sticky;top:0;width:100%;z-index:9999;background:rgba(244,241,232,.96);border-bottom:1px solid var(--strong)}.header-inner{max-width:var(--max);margin:0 auto;min-height:72px;padding:0 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}.site-logo{display:flex;align-items:center;flex:0 0 auto}.site-logo img{max-height:44px;width:auto;max-width:170px}.nav-core{display:flex;align-items:center;gap:24px;white-space:nowrap}.nav-core a{text-decoration:none;padding:8px 2px;border-bottom:2px solid transparent;font-weight:650;font-size:14px}.nav-core a:hover,.nav-core a.active{border-bottom-color:var(--ink)}.header-actions{display:flex;align-items:center;gap:14px}.main-btn,.secondary-btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:10px 18px;text-decoration:none;font-weight:750;border:1px solid var(--ink);border-radius:4px;transition:.2s ease}.main-btn{background:var(--ink);color:#fff}.main-btn:hover{background:var(--lime);color:var(--ink)}.secondary-btn{background:transparent;color:var(--ink)}.secondary-btn:hover{background:var(--ink);color:#fff}.main-btn.compact{min-height:42px;padding:8px 15px;font-size:14px}.menu-toggle{width:42px;height:42px;border:1px solid var(--ink);background:transparent;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;cursor:pointer}.menu-toggle span{display:block;background:var(--ink);height:2px}.menu-toggle span:nth-child(1){width:22px}.menu-toggle span:nth-child(2){width:15px}.menu-toggle span:nth-child(3){width:22px}.mobile-menu{display:none}.drawer-overlay{position:fixed;inset:0;background:rgba(0,0,0,.56);z-index:10000;opacity:0;visibility:hidden;transition:.2s}.drawer-overlay.open{opacity:1;visibility:visible}.site-drawer{position:fixed;z-index:10001;top:0;right:0;width:min(480px,92vw);height:100dvh;background:var(--ink);color:var(--paper);transform:translateX(102%);transition:transform .28s ease;overflow:auto;padding:24px 30px}.site-drawer.open{transform:translateX(0)}.drawer-head{display:flex;align-items:center;justify-content:space-between;padding-bottom:20px;border-bottom:1px solid rgba(255,255,255,.28)}.drawer-close{border:0;background:transparent;color:#fff;font-size:36px;line-height:1;cursor:pointer}.drawer-nav{display:grid;margin-top:10px}.drawer-nav a{display:flex;gap:18px;align-items:baseline;padding:14px 0;border-bottom:1px solid rgba(255,255,255,.18);text-decoration:none;font-size:clamp(20px,3vw,31px);font-weight:750}.drawer-nav a span{font-size:12px;color:var(--lime);min-width:28px}.drawer-nav a:hover,.drawer-nav a.active{color:var(--lime)}.container{width:min(var(--max),calc(100% - 48px));margin:0 auto}.section{padding:96px 0}.section-tight{padding:56px 0}.section-dark{background:var(--dark);color:var(--paper)}.section-blue{background:#E5EAFF}.section-lime{background:#F1F8C9}.editorial-block{border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.section-index{color:var(--blue);font-weight:800;letter-spacing:.12em;font-size:12px}.accent-label{display:inline-block;background:var(--lime);color:var(--ink);padding:4px 8px;font-size:12px;font-weight:800;letter-spacing:.08em}.eyebrow{font-size:12px;font-weight:800;letter-spacing:.16em;text-transform:uppercase;color:var(--blue)}h1,h2,h3,.section-title{color:var(--ink);margin-top:0;line-height:1.08;letter-spacing:-.03em}h1{font-size:clamp(54px,8vw,104px);margin-bottom:28px}h2{font-size:clamp(34px,5vw,58px);margin-bottom:26px}h3{font-size:clamp(22px,2.5vw,30px);margin-bottom:14px}p{margin:0 0 18px}.lead{font-size:clamp(18px,2vw,23px);line-height:1.65;max-width:820px}.muted{color:var(--muted)}.text-link{color:var(--blue);font-weight:700;text-underline-offset:4px}.hero{padding:72px 0 56px}.hero-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:start}.hero-copy{grid-column:1/span 7}.hero-visual{grid-column:8/span 5;border:1px solid var(--ink);background:var(--white);padding:12px;position:relative}.hero-visual img{width:100%;height:auto;object-fit:contain}.hero-code{display:flex;justify-content:space-between;border-top:1px solid var(--ink);padding-top:10px;margin-top:12px;font-size:12px;font-weight:800;letter-spacing:.1em}.hero-intro{max-width:750px;font-size:17px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:26px}.hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin-top:42px;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.hero-points span{padding:14px 12px;border-right:1px solid var(--ink);font-weight:700}.hero-points span:last-child{border-right:0}.info-band{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.info-band article{padding:28px 22px;border-right:1px solid var(--ink)}.info-band article:last-child{border-right:0}.info-band strong{display:block;color:var(--blue);font-size:13px;margin-bottom:12px}.info-band h3{font-size:22px;margin-bottom:10px}.info-band p{font-size:14px;color:var(--muted);margin:0}.channel-index{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--ink)}.channel-index a{display:grid;grid-template-columns:68px 160px 1fr 24px;gap:16px;padding:18px 10px;border-bottom:1px solid var(--ink);text-decoration:none;align-items:center}.channel-index a:nth-child(odd){border-right:1px solid var(--ink)}.channel-index .no{color:var(--blue);font-weight:800}.channel-index .name{font-weight:800}.channel-index .desc{color:var(--muted);font-size:14px}.channel-index a:hover{background:var(--lime)}.brand-grid,.feature-grid,.security-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:30px;align-items:start}.brand-copy{grid-column:1/span 5}.brand-media{grid-column:7/span 6;border:1px solid var(--ink);padding:10px;background:var(--white)}.brand-media img{width:100%}.feature-main{grid-column:1/span 8}.feature-side{grid-column:9/span 4}.content-img{border:1px solid var(--ink);background:var(--white);padding:8px}.content-img img{width:100%;height:auto;object-fit:contain}.index-list{border-top:1px solid var(--ink);margin-top:18px}.index-list .row{display:grid;grid-template-columns:50px 1fr;gap:15px;padding:14px 0;border-bottom:1px solid var(--line)}.index-list .row span:first-child{color:var(--blue);font-weight:800}.pair-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:0;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.pair-panel{padding:44px;min-width:0}.pair-panel+.pair-panel{border-left:1px solid var(--ink)}.pair-panel.dark{background:var(--ink);color:var(--paper)}.pair-panel.dark h2,.pair-panel.dark h3{color:var(--paper)}.pair-panel img{margin-bottom:24px;max-height:520px;object-fit:contain;width:100%}.service-points{display:grid;gap:10px;margin:22px 0}.service-points div{border-top:1px solid currentColor;padding-top:10px}.triple-grid{display:grid;grid-template-columns:1fr .9fr 1.1fr;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.triple-grid>article{padding:34px;border-right:1px solid var(--ink);min-width:0}.triple-grid>article:last-child{border-right:0}.triple-grid img{margin:18px 0;border:1px solid var(--ink)}.date-block{font-size:58px;line-height:1;color:var(--blue);font-weight:900}.security-grid .security-copy{grid-column:1/span 5}.security-grid .security-images{grid-column:6/span 7;display:grid;grid-template-columns:1fr 1fr;gap:18px}.security-images figure{margin:0}.security-images figcaption{font-size:12px;margin-top:8px;color:#c8c6bd}.security-images img{border:1px solid rgba(255,255,255,.28);background:#fff}.review-wall{display:grid;grid-template-columns:repeat(12,1fr);gap:18px}.quote{border-top:1px solid var(--ink);padding:24px 4px 18px;position:relative}.quote:nth-child(1){grid-column:1/span 5}.quote:nth-child(2){grid-column:6/span 7;background:#F1F8C9;padding:24px}.quote:nth-child(3){grid-column:2/span 6}.quote:nth-child(4){grid-column:8/span 5;background:#E5EAFF;padding:24px}.quote:nth-child(5){grid-column:1/span 7}.quote:nth-child(6){grid-column:8/span 4}.quote b{display:block;color:var(--blue);font-size:12px;margin-bottom:12px}.quote p{font-size:17px}.faq-list{border-top:1px solid var(--ink)}.faq-item{border-bottom:1px solid var(--ink)}.faq-question{width:100%;display:grid;grid-template-columns:60px 1fr 28px;gap:14px;align-items:start;border:0;background:transparent;color:var(--ink);text-align:left;padding:22px 0;cursor:pointer;font-weight:800}.faq-question span:first-child{color:var(--blue)}.faq-question i{font-style:normal;font-size:20px}.faq-answer{padding:0 42px 22px 74px;color:var(--muted)}.js .faq-answer{display:none}.js .faq-item.open .faq-answer{display:block}.responsible-box{display:grid;grid-template-columns:1fr 2fr;gap:28px;border:1px solid var(--ink);padding:32px;background:var(--white)}.responsible-box strong{font-size:clamp(28px,4vw,50px);line-height:1.05}.site-footer{background:var(--ink);color:var(--paper);padding:76px 0 30px}.footer-inner{width:min(var(--max),calc(100% - 48px));margin:auto}.footer-brand{display:grid;grid-template-columns:1fr 2fr;gap:24px;align-items:end;padding-bottom:42px;border-bottom:1px solid rgba(255,255,255,.28)}.footer-brand .accent-label{grid-column:1/-1;justify-self:start}.footer-wordmark{font-size:clamp(50px,8vw,110px);font-weight:900;line-height:.9;letter-spacing:-.06em}.footer-brand p{color:#c8c6bd;max-width:650px}.footer-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding:36px 0;border-bottom:1px solid rgba(255,255,255,.28)}.footer-columns h3{color:var(--paper);font-size:15px;letter-spacing:.08em}.footer-columns a{display:block;color:#d8d5cc;text-decoration:none;padding:3px 0}.footer-columns a:hover{color:var(--lime)}.footer-bottom{display:flex;justify-content:space-between;gap:30px;padding-top:22px;color:#a8a59d;font-size:12px}.mobile-bottom-nav{display:none}
/* inner pages */.page-hero{padding:64px 0 50px;border-bottom:1px solid var(--ink)}.page-hero .hero-meta{display:flex;justify-content:space-between;gap:16px;font-size:12px;font-weight:800;letter-spacing:.12em;margin-bottom:24px}.page-hero h1{font-size:clamp(48px,7.5vw,96px);max-width:1000px}.page-hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:36px;align-items:end}.page-hero-grid img{border:1px solid var(--ink);padding:8px;background:var(--white)}.page-hero.dark{background:var(--ink);color:var(--paper);border-bottom-color:rgba(255,255,255,.25)}.page-hero.dark h1{color:var(--paper)}.page-hero.dark img{border-color:rgba(255,255,255,.35)}.page-layout{padding:76px 0}.article-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px}.article-grid .article-main{font-size:17px}.article-grid aside{border-left:1px solid var(--ink);padding-left:28px}.numbered-services{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--ink)}.numbered-services article{padding:26px 20px;border-bottom:1px solid var(--ink)}.numbered-services article:nth-child(odd){border-right:1px solid var(--ink)}.numbered-services .num{color:var(--blue);font-weight:900}.numbered-services p{color:var(--muted)}.wide-image{border-top:1px solid var(--ink);border-bottom:1px solid var(--ink);padding:18px 0;margin:60px 0}.wide-image img{width:100%;max-height:720px;object-fit:contain}.steps{counter-reset:step;border-top:1px solid var(--ink)}.step{display:grid;grid-template-columns:90px 1fr;gap:20px;padding:22px 0;border-bottom:1px solid var(--ink)}.step:before{counter-increment:step;content:"0" counter(step);color:var(--blue);font-size:28px;font-weight:900}.topic-directory{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--ink)}.topic-directory article{padding:24px;border-right:1px solid var(--ink)}.topic-directory article:last-child{border-right:0}.topic-directory p{color:var(--muted)}.pullquote{font-size:clamp(28px,4.5vw,58px);line-height:1.18;font-weight:850;letter-spacing:-.04em;padding:60px 0;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.support-strip{display:grid;grid-template-columns:1fr 2fr;gap:30px;padding:30px;border:1px solid var(--ink);background:var(--lime);margin:56px 0}.support-strip h2{font-size:28px}.mini-review{border-left:6px solid var(--blue);padding:10px 0 10px 22px;margin:48px 0;font-size:19px}.app-guide{display:grid;grid-template-columns:.8fr 1.2fr;gap:40px;align-items:start}.app-guide figure{margin:0;border:1px solid var(--ink);padding:10px;background:var(--white);position:sticky;top:105px}.app-capabilities{border-top:1px solid var(--ink)}.app-capabilities article{display:grid;grid-template-columns:58px 180px 1fr;gap:16px;padding:18px 0;border-bottom:1px solid var(--ink)}.app-capabilities .num{color:var(--blue);font-weight:900}.timeline{border-left:2px solid var(--ink);margin-left:18px;padding-left:34px}.timeline article{position:relative;padding:0 0 34px}.timeline article:before{content:"";position:absolute;left:-42px;top:7px;width:14px;height:14px;background:var(--lime);border:2px solid var(--ink)}.contact-flow{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.contact-flow article{padding:24px 18px;border-right:1px solid var(--ink)}.contact-flow article:last-child{border-right:0}.notice{padding:24px;border:1px solid var(--ink);background:#E5EAFF}.notice strong{display:block;margin-bottom:8px}.faq-page .faq-answer{font-size:16px}.faq-page .faq-question{font-size:19px}.faq-page .faq-answer p{margin:0}.faq-page .faq-item{background:transparent}
@media (max-width:1050px){.nav-core{gap:14px}.nav-core a{font-size:13px}.hero-copy{grid-column:1/span 6}.hero-visual{grid-column:7/span 6}.triple-grid{grid-template-columns:1fr 1fr}.triple-grid>article:last-child{grid-column:1/-1;border-top:1px solid var(--ink)}.triple-grid>article:nth-child(2){border-right:0}.channel-index a{grid-template-columns:54px 130px 1fr 20px}.quote:nth-child(n){grid-column:span 6}.topic-directory{grid-template-columns:1fr 1fr}.topic-directory article:nth-child(2){border-right:0}.topic-directory article:last-child{grid-column:1/-1;border-top:1px solid var(--ink)}}
@media (max-width:820px){body{padding-bottom:58px}.header-inner{padding:0 16px;min-height:64px}.nav-core,.desktop-menu{display:none}.mobile-menu{display:flex}.site-logo img{max-height:36px;max-width:130px}.main-btn.compact{min-height:40px;padding:8px 11px;font-size:13px}.container,.footer-inner{width:min(100% - 36px,var(--max))}.section{padding:70px 0}.section-tight{padding:44px 0}.hero{padding:48px 0 34px}.hero-grid,.brand-grid,.feature-grid,.security-grid{display:block}.hero-copy,.hero-visual,.brand-copy,.brand-media,.feature-main,.feature-side,.security-grid .security-copy,.security-grid .security-images{width:auto}.hero-visual,.brand-media,.feature-side,.security-images{margin-top:30px}.hero-points{grid-template-columns:1fr}.hero-points span{border-right:0;border-bottom:1px solid var(--ink)}.hero-points span:last-child{border-bottom:0}.info-band{grid-template-columns:1fr 1fr}.info-band article:nth-child(2){border-right:0}.info-band article:nth-child(-n+2){border-bottom:1px solid var(--ink)}.channel-index{grid-template-columns:1fr}.channel-index a{grid-template-columns:48px 115px 1fr 18px}.channel-index a:nth-child(odd){border-right:0}.pair-grid{grid-template-columns:1fr}.pair-panel{padding:34px 22px}.pair-panel+.pair-panel{border-left:0;border-top:1px solid var(--ink)}.triple-grid{grid-template-columns:1fr}.triple-grid>article{border-right:0!important;border-bottom:1px solid var(--ink)}.triple-grid>article:last-child{grid-column:auto;border-bottom:0}.security-grid .security-images{grid-template-columns:1fr 1fr}.review-wall{display:block}.quote{margin-bottom:16px}.responsible-box{grid-template-columns:1fr}.footer-brand{grid-template-columns:1fr}.footer-columns{grid-template-columns:1fr 1fr}.footer-bottom{display:block}.mobile-bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:9998;display:grid;grid-template-columns:repeat(4,1fr);background:var(--paper);border-top:1px solid var(--ink);padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom-nav a{text-align:center;text-decoration:none;padding:11px 4px;font-size:12px;font-weight:800}.mobile-bottom-nav a.active{background:var(--lime)}.page-hero-grid,.article-grid,.app-guide{grid-template-columns:1fr}.page-hero-grid img{margin-top:20px}.article-grid aside{border-left:0;border-top:1px solid var(--ink);padding-left:0;padding-top:24px}.numbered-services{grid-template-columns:1fr}.numbered-services article:nth-child(odd){border-right:0}.topic-directory{grid-template-columns:1fr}.topic-directory article{border-right:0;border-bottom:1px solid var(--ink)}.topic-directory article:last-child{grid-column:auto;border-bottom:0;border-top:0}.support-strip{grid-template-columns:1fr}.app-guide figure{position:static}.app-capabilities article{grid-template-columns:50px 1fr}.app-capabilities article p{grid-column:2}.contact-flow{grid-template-columns:1fr 1fr}.contact-flow article:nth-child(2){border-right:0}.contact-flow article:nth-child(-n+2){border-bottom:1px solid var(--ink)}}
@media (max-width:520px){.container,.footer-inner{width:calc(100% - 32px)}h1{font-size:clamp(46px,17vw,74px)}h2{font-size:clamp(32px,11vw,46px)}.hero-intro{font-size:16px}.info-band{grid-template-columns:1fr}.info-band article{border-right:0;border-bottom:1px solid var(--ink)}.info-band article:last-child{border-bottom:0}.channel-index a{grid-template-columns:42px 1fr 18px}.channel-index .desc{grid-column:2/-1;padding-top:4px}.security-grid .security-images{grid-template-columns:1fr}.footer-columns{grid-template-columns:1fr}.footer-bottom span{display:block;margin-bottom:10px}.faq-question{grid-template-columns:42px 1fr 24px}.faq-answer{padding:0 10px 20px 42px}.page-layout{padding:56px 0}.step{grid-template-columns:56px 1fr}.contact-flow{grid-template-columns:1fr}.contact-flow article{border-right:0;border-bottom:1px solid var(--ink)}.contact-flow article:last-child{border-bottom:0}.app-capabilities article{grid-template-columns:42px 1fr}.header-actions{gap:6px}.site-logo{position:absolute;left:50%;transform:translateX(-50%)}.site-logo img{max-width:100px}.main-btn.compact{padding:7px 9px}.site-drawer{padding:20px 22px}}