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1fr;gap:70px;align-items:start}.control-copy p{margin:18px 0 25px;max-width:390px}.faq{border-top:1px solid var(--line)}.faq details{border-bottom:1px solid var(--line);padding:18px 0}.faq summary{cursor:pointer;list-style:none;font-size:14px;display:flex;justify-content:space-between;gap:20px}.faq summary:after{content:'+';font-size:20px}.faq summary::-webkit-details-marker{display:none}.faq details[open] summary:after{content:'−'}.faq p{font-size:12px;line-height:1.9;padding:15px 20px 0 0}.bottom-cta{display:flex;align-items:center;justify-content:space-between;gap:30px;padding-top:48px;padding-bottom:48px;border-top:1px solid var(--line)}.bottom-cta h2{font-size:27px}.bottom-cta p{margin-top:10px;font-size:13px}.footer{padding-top:25px;padding-bottom:85px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--muted);gap:20px}.footer-links{display:flex;gap:22px}.review{position:fixed;right:18px;bottom:15px;z-index:40;display:flex;align-items:center;gap:3px;background:#f0f0ed;color:#252529;padding:5px;border:1px solid #cacacd;border-radius:5px;font-size:11px;box-shadow:0 2px 8px #0002}.review a{padding:6px 10px;border-radius:3px}.review a:hover{background:#dfdfda;color:#222}.review a[aria-current=page]{background:#242428;color:#fff}.review span{color:#77747b;padding:0 8px}.toast{position:fixed;left:50%;bottom:78px;transform:translateX(-50%);padding:11px 20px;background:var(--ink);color:var(--bg);border:1px solid var(--line);border-radius:4px;font-size:12px;z-index:60;max-width:90vw}.reveal{opacity:1}.js-ready .reveal{opacity:0;transition:opacity .5s}.js-ready .reveal.visible{opacity:1}.hero-copy>*{animation:fade-in .55s both}.hero-copy>*:nth-child(2){animation-delay:.08s}.hero-copy>*:nth-child(3){animation-delay:.16s}.hero-copy>*:nth-child(4){animation-delay:.24s}@keyframes fade-in{from{opacity:0}to{opacity:1}}
/* 01 - restrained developer platform */
.developer-hero{display:grid;grid-template-columns:1fr 1.04fr;gap:70px;align-items:center;padding-top:84px;padding-bottom:75px;min-height:580px}.developer-hero h1{margin-bottom:0}.developer-hero h1 span{color:var(--accent)}.developer-hero .base-url{margin-top:17px}.developer-hero .codebox{background:#1a191e}.developer-hero .hero-description{font-size:15px}.developer .model-section{padding-top:56px}.developer .guide-section{background:#19191c}.developer .bottom-cta .primary{min-width:145px}
/* 02 - clear, information-first service portal */
.clear{color-scheme:light;--bg:#fafbfc;--surface:#fff;--hover:#f0f3f2;--ink:#202b29;--muted:#657571;--line:#dce4e1;--accent:#277766;--accent-ink:#fff;--green:#277766}.clear .header{background:#fff}.clear .brand-mark{background:var(--accent);color:#fff}.clear .primary:hover{background:#195e50;border-color:#195e50;color:#fff}.guide-banner{border-bottom:1px solid var(--line);background:#eff5f2;padding:9px var(--pad);display:flex;justify-content:center;align-items:center;gap:14px;font-size:12px;color:#566c62}.guide-banner strong{font-weight:500;color:#277766}.guide-banner a{margin-left:15px;font-size:12px}.clear-hero{text-align:center;padding-top:50px;padding-bottom:43px}.clear-hero .scope{margin-bottom:15px}.clear-hero h1{font-size:50px;letter-spacing:-1.5px}.clear-hero .hero-description{max-width:700px;margin:17px auto 23px;font-size:14px}.clear-hero .actions{justify-content:center}.clear-hero .base-url{width:max-content;max-width:100%;margin:24px auto 0;background:#fff}.clear-hero .base-url code{font-size:11px}.clear-content{padding-bottom:58px;display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:38px}.clear-content h2{font-size:22px}.clear-content .section-header{margin-bottom:16px}.clear-content .section-header p{font-size:12px}.clear-content .table-toolbar{margin-bottom:12px}.clear-content .model-search{width:190px}.clear-content .model-table{min-width:605px}.clear-content .model-table td{padding:22px 0}.clear-content .model-table th:not(:first-child),.clear-content .model-table td:not(:first-child){padding-left:14px}.clear-content .model-table .model-id{font-size:9px}.clear-content .model-table .provider{display:none}.clear-content .model-table .spec{font-size:11px}.clear-content .price{font-size:15px}.clear-content .price-note{flex-direction:column;gap:8px;font-size:10px}.clear-content .model-filters{gap:18px}.service-aside{border-left:1px solid var(--line);padding-left:27px}.service-aside h3{font-size:16px;margin-bottom:20px}.aside-step{display:flex;gap:13px;padding:14px 0;border-bottom:1px solid var(--line)}.aside-step>span{font-family:Consolas,monospace;font-size:12px;color:var(--accent);padding-top:1px}.aside-step strong{display:block;font-size:12px;font-weight:500}.aside-step p{font-size:11px;margin-top:4px}.aside-step a{font-size:11px;display:inline-block;margin-top:6px;color:var(--accent)}.aside-links{margin-top:24px}.aside-links a{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:11px 0;font-size:12px}.clear .codebox{background:#f4f7f5}.clear .code-pane pre{color:#53655a}.clear .code-caption{font-size:10px}.clear .guide-section{background:#edf3f0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.clear-guide-layout{display:grid;grid-template-columns:1fr 1fr;gap:65px;align-items:center}.clear-guide-copy h2{font-size:32px}.clear-guide-copy p{font-size:14px;margin:20px 0 25px;max-width:410px}.clear .footer{background:#fff}.clear .bottom-cta{border-top:0}.clear .service-strip{background:#fff}
/* 03 - a routing visualization with purposeful motion */
.signal{--bg:#0c100e;--surface:#131a16;--hover:#1c2920;--ink:#e8f1e9;--muted:#8eaa95;--line:#2b3c30;--accent:#a3e9a3;--accent-ink:#0f2716;--green:#a5cba9}.signal .header{border-bottom-color:#233127}.signal .brand-mark{color:#0c100e;background:var(--accent)}.signal-hero{position:relative;padding-top:42px;padding-bottom:32px;overflow:hidden;background-image:linear-gradient(#8cce8a06 1px,transparent 1px),linear-gradient(90deg,#8cce8a06 1px,transparent 1px);background-size:56px 56px}.signal-hero .hero-copy{text-align:center;position:relative}.signal-hero .scope{margin-bottom:17px}.signal-hero h1{font-size:clamp(40px,4.1vw,59px);line-height:1.25;letter-spacing:-1.5px}.signal-hero h1 span{color:var(--accent)}.signal-hero .hero-description{font-size:14px;max-width:650px;margin:18px auto 22px}.signal-hero .actions{justify-content:center}.routing{position:relative;margin:34px auto 0;max-width:1000px;height:244px;isolation:isolate}.routing svg{position:absolute;inset:0;width:100%;height:100%;z-index:-1;overflow:visible}.route-static{fill:none;stroke:#4d7656;stroke-width:1.4}.route-packet{fill:none;stroke:#baefaa;stroke-width:2.5;stroke-dasharray:22 660;animation:route 5s linear infinite}.route-packet.second{animation-delay:1.8s}.route-packet.third{animation-delay:3.4s}@keyframes route{to{stroke-dashoffset:-682}}.route-node{position:absolute;display:flex;flex-direction:column;justify-content:center;border:1px solid #3d6046;background:#101711;border-radius:6px;top:72px;height:100px;padding:17px 24px}.route-node strong{font-size:16px;font-weight:500}.route-node p{font-size:10px;margin-top:5px}.client-node{width:190px;left:0}.gateway-node{width:230px;left:calc(50% - 115px);border-color:#82b78a;background:#1c2d20}.gateway-node .gateway-name{display:flex;gap:12px;align-items:center}.gateway-node .gateway-name>span{font-weight:700;background:var(--accent);color:var(--accent-ink);font-size:20px;line-height:30px;text-align:center;width:31px;border-radius:4px}.gateway-node code{font-size:10px;color:var(--muted);margin-top:8px}.target-node{right:0;width:190px;height:76px;top:27px}.target-node.google{top:146px}.target-node strong{font-size:14px}.connection-label{position:absolute;top:93px;font-size:10px;color:#9ec0a3;background:var(--bg);padding:3px 10px}.connection-label.left{left:23%}.connection-label.right{left:67%;top:52px}.routing-foot{display:flex;justify-content:space-between;align-items:center;gap:20px;color:var(--muted);font-size:10px;margin-top:6px}.motion-toggle{font-size:10px;color:var(--muted);border-bottom:1px solid var(--line);padding:3px 0}.paused .route-packet{animation-play-state:paused}.signal .model-section{border-top:1px solid var(--line)}.signal .codebox{background:#111914}.signal .guide-section{background:#101913}.signal .code-head{font-family:Consolas,"Microsoft YaHei",monospace}.signal-guide{display:grid;grid-template-columns:1fr 1fr;gap:65px;align-items:start}.signal-guide .protocol-note{border-top:1px solid var(--line);padding:17px 0;margin-top:24px;display:flex;gap:20px}.protocol-note code{font-size:12px;color:var(--accent)}.protocol-note p{font-size:12px}.signal .bottom-cta h2{font-size:29px}.signal .model-name{font-weight:500}.signal .provider{border-color:#415747}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
@media(max-width:1100px){.nav-links{gap:20px}.nav{gap:20px}.developer-hero{gap:34px;padding-top:60px;padding-bottom:60px;grid-template-columns:1fr 1fr}.developer-hero h1{font-size:49px}.code-pane{padding:20px 18px}.code-pane pre{font-size:11px}.base-url{gap:10px}.base-url code{font-size:10px}.base-url .url-label{padding-left:11px;font-size:10px}.copy{padding:10px}.hero-description{font-size:14px}.clear-content{grid-template-columns:minmax(0,1fr) 245px;gap:25px}.service-aside{padding-left:21px}.clear-content .model-table{min-width:530px}.clear-content .model-table .model-title{gap:0}.clear-content .model-table .model-name{font-size:12px}.clear-content .model-table .model-id{font-size:8px}.clear-content .model-table .spec{font-size:10px}.routing{max-width:850px}.route-node{padding:15px 18px}.client-node{width:165px}.target-node{width:170px}.gateway-node{width:210px;left:calc(50% - 105px)}.connection-label.left{left:22%}.connection-label.right{left:66%}.clear-guide-layout,.signal-guide,.control-section{gap:40px}}
@media(max-width:820px){.nav-links{gap:18px}.nav-end .login{display:none}.developer-hero{grid-template-columns:1fr 1fr;gap:25px}.developer-hero h1{font-size:42px}.developer-hero .hero-description{font-size:13px}.inline-note{gap:10px;font-size:10px}.service-strip{gap:20px}.service-strip strong{font-size:12px}.service-strip span{font-size:10px}.clear-content{grid-template-columns:1fr}.service-aside{border-left:0;border-top:1px solid var(--line);padding-left:0;padding-top:24px;display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.service-aside h3{grid-column:1/-1;margin-bottom:0}.aside-step{padding:0 0 18px}.aside-links{grid-column:1/-1;display:flex;gap:24px;margin-top:0}.aside-links a{gap:20px}.routing{height:230px}.client-node{width:140px}.target-node{width:145px}.gateway-node{width:190px;left:calc(50% - 95px)}.route-node{padding:12px}.route-node strong{font-size:13px}.route-node p{font-size:9px}.gateway-node code{font-size:8px}.connection-label{display:none}}
@media(max-width:650px){:root{--pad:22px}.header{height:66px}.nav{justify-content:space-between;gap:12px}.brand{font-size:19px;gap:9px}.brand-mark{width:28px;height:28px;font-size:21px}.nav-end{margin-left:auto;gap:7px}.nav-end .btn{min-height:34px;padding:7px 13px;font-size:11px}.menu-btn{display:block}.nav-links{position:absolute;left:0;right:0;top:65px;z-index:20;background:var(--bg);border-bottom:1px solid var(--line);padding:16px 22px;display:none;flex-direction:column;gap:0}.nav-links.open{display:flex}.nav-links a{padding:11px 0}.developer-hero{display:flex;flex-direction:column;align-items:stretch;gap:34px;padding-top:38px;padding-bottom:33px;min-height:0}.developer-hero h1{font-size:43px;letter-spacing:-1.6px}.scope{font-size:11px;margin-bottom:16px}.developer-hero .hero-description{font-size:13px;margin-top:18px;margin-bottom:21px;max-width:340px}.actions{gap:10px}.btn{min-height:42px;padding:9px 16px;font-size:12px;gap:18px}.inline-note{gap:18px;font-size:10px;margin-top:19px}.code-head{padding:13px 15px;font-size:11px;gap:12px}.code-head span{font-size:10px}.code-tabs{padding:0 15px;gap:20px}.code-tab{font-size:11px;padding:9px 0}.code-pane{padding:18px 15px;min-height:215px}.code-pane pre{font-size:10px;line-height:1.8}.code-foot{padding:10px 15px;font-size:10px;gap:12px}.code-foot .copy{font-size:10px}.base-url{gap:10px}.base-url code{font-size:9px}.base-url .url-label{font-size:9px;padding-left:10px}.copy{font-size:10px;padding:10px}.code-caption{font-size:10px;margin-top:10px}.section{padding-top:44px;padding-bottom:44px}.section-header{align-items:flex-start;flex-direction:column;gap:16px;margin-bottom:22px}.section-header h2{font-size:25px}.section-header p{font-size:12px}.section-header .plain-link{font-size:12px}.service-strip{grid-template-columns:1fr 1fr;gap:22px 25px;padding-top:23px;padding-bottom:23px}.service-strip a:after{right:0;font-size:12px}.service-strip strong{font-size:12px}.service-strip span{font-size:10px}.developer .model-section{padding-top:43px}.table-toolbar{align-items:stretch;gap:16px;flex-direction:column}.model-search{width:100%;font-size:12px}.model-filters{gap:25px}.model-filters button{font-size:12px;padding:5px 0}.model-table{min-width:590px}.model-table td{padding:17px 0}.model-table .model-title{gap:10px}.provider{width:30px;height:30px;font-size:13px}.model-name{font-size:12px}.model-id{font-size:9px}.model-table th{font-size:10px}.model-table td{font-size:11px}.model-table .spec{font-size:10px}.model-table th:not(:first-child),.model-table td:not(:first-child){padding-left:15px}.price{font-size:15px}.price-note{flex-direction:column;gap:10px;font-size:10px}.steps{grid-template-columns:1fr;gap:26px}.step{display:grid;grid-template-columns:25px 1fr;gap:8px 15px;padding-top:19px}.step-number{grid-column:1;grid-row:1/4;margin:0}.step h3{font-size:16px;margin-bottom:3px}.step 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.developer .hero-price{display:block;width:fit-content;margin:-8px 0 24px;color:var(--muted);font-size:12px}.hero-price>span:first-child{display:flex;align-items:baseline;gap:10px}.hero-price strong{font-size:31px;line-height:1.4;font-weight:550;color:var(--accent);letter-spacing:-1px}.hero-price .price-unit{font-size:11px}.hero-price .price-arrow{color:var(--accent);font-size:18px;margin-left:4px}.hero-price .offer-condition{display:block;font-size:10px;margin-top:5px;color:var(--muted)}.hero-price:hover strong{text-decoration:underline;text-underline-offset:6px}.minimum-group{display:block;margin-top:6px;font-size:10px;color:var(--muted);overflow-wrap:anywhere}.minimum-row .price{color:var(--accent)}.minimum-row .price em{font-size:11px;color:var(--muted)}
.clear-content>section{min-width:0}
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@media(max-width:650px){.signal-hero .hero-description{text-wrap:balance}.developer .hero-price{margin:0 0 20px;font-size:11px}.hero-price strong{font-size:29px}.hero-price .offer-condition{font-size:9px}.minimum-group{font-size:9px;line-height:1.6;margin-top:6px}.minimum-row .price em{font-size:9px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}.js-ready .reveal{opacity:1}}

/* Production: no concept switcher; retain compact footer. */
.footer{padding-bottom:32px}.footer-links{flex-wrap:wrap}.code-link:disabled{opacity:.45;cursor:not-allowed}
@media(max-width:650px){.footer{padding-bottom:28px}.footer-links{gap:16px}.menu-btn{min-width:40px;min-height:40px}.model-filters button{min-height:40px}.model-id{cursor:help}}

/* 2026-09-22: authentication remains visible at every navigation breakpoint. */
#mxb-home .nav-end{flex-shrink:0;gap:14px}
#mxb-home .nav-end .login{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:8px 14px;border:1px solid var(--line);border-radius:5px;color:var(--ink);white-space:nowrap}
#mxb-home .nav-end .login:hover{background:var(--hover);border-color:var(--muted)}
#mxb-home .nav-links a{white-space:nowrap}
#mxb-home .mobile-console{display:none}
@media(max-width:900px){
  #mxb-home .nav{justify-content:space-between;gap:12px}
  #mxb-home .nav-end{margin-left:auto;gap:10px}
  #mxb-home .desktop-console{display:none}
  #mxb-home .menu-btn{display:block;min-width:44px;min-height:44px}
  #mxb-home .nav-links{position:absolute;left:0;right:0;top:75px;z-index:20;background:var(--bg);border-bottom:1px solid var(--line);padding:12px var(--pad);display:none;flex-direction:column;gap:0;margin:0}
  #mxb-home .nav-links.open{display:flex}
  #mxb-home .nav-links a{display:block;padding:11px 0;min-height:44px}
  #mxb-home .nav-links .mobile-console{border-top:1px solid var(--line);margin-top:4px;color:var(--ink)}
}
@media(max-width:650px){
  #mxb-home .nav-links{top:65px}
  #mxb-home .nav-end{gap:6px}
  #mxb-home .nav-end .login{font-size:12px;padding:8px 10px}
}