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@media(min-width:1600px){.section,.footer{padding-left:max(var(--pad),calc((100vw - 1500px)/2));padding-right:max(var(--pad),calc((100vw - 1500px)/2))}}
@media(max-width:1150px){.site-header nav{gap:18px}.header-end{gap:14px}.beta-link{display:none}.hero h1{font-size:clamp(58px,7.6vw,95px)}.hero{padding-top:45px}.hero .eyebrow{font-size:10px}.hero-actions{flex-wrap:wrap;gap:12px}.hero-actions>span{max-width:100%}.tool-card{padding:30px 24px}.tool-card h3{font-size:22px}.guide-layout{grid-template-columns:210px minmax(0,1fr);gap:35px}.guide-detail{grid-template-columns:1fr 210px;gap:24px}.privacy-layout{gap:8%;grid-template-columns:230px minmax(0,1fr)}.showcase{gap:6%}.showcase-tabs button{font-size:19px}.device{width:270px}}
@media(max-width:850px){.site-header{height:90px;gap:20px}.hero{gap:30px 16px}.hero h1{font-size:clamp(53px,7.7vw,68px);margin-top:30px}.hero .intro{font-size:16px}.hero .eyebrow{max-width:320px}.hero-actions .button{font-size:14px}.antenna-lab{margin-left:0}.antenna-lab>figcaption{font-size:9px}.lab-bottom{margin-top:0}.band-switch button{font-size:12px;min-width:0;padding:8px 12px}.section{padding-top:70px;padding-bottom:70px}.hero-bottom{gap:35px;font-size:12px}.hero-bottom>span{font-size:10px}.toolkit .section-heading{gap:28px}.tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.personal{gap:6%;padding-top:0}.palette-demo{padding:20px}.palette-head{flex-wrap:wrap;gap:5px}.palette-controls{gap:5px}.palette-controls button{padding:8px 12px;font-size:12px}.spectrum-bars{gap:4px;height:220px}.promise{grid-template-columns:1fr;gap:35px}.promise-copy{max-width:700px}.showcase{gap:6%;margin-top:40px}.showcase-tabs button{font-size:17px;gap:12px;padding:17px 0}.showcase-image{padding:8px}.device{width:240px;border-radius:35px}.guide-layout{grid-template-columns:190px minmax(0,1fr);gap:28px}.guide-detail{grid-template-columns:1fr}.guide-capture{max-width:260px;margin:20px auto 0}.guide-description h2{font-size:32px}.guide-banner{flex-wrap:wrap;gap:10px 25px}.guide-banner h3{flex:1}.source-note{grid-template-columns:1fr 3fr}.footer-top{align-items:start}.footer-top p{max-width:180px}.footer-bottom{flex-wrap:wrap;gap:5px 25px}.privacy-layout{grid-template-columns:180px minmax(0,1fr);gap:8%}.privacy-layout aside a{font-size:13px}.privacy-article h2{font-size:26px}.contact{gap:6%}.contact .actions{gap:15px}}
@media(max-width:620px){:root{--pad:23px}html{scroll-padding-top:20px}.site-header{height:auto;min-height:115px;flex-wrap:wrap;gap:8px;padding-top:17px;padding-bottom:10px}.brand img{width:31px;height:31px}.brand span{font-size:12px}.header-end{order:2;margin-left:auto}.site-header nav{order:3;flex-basis:100%;justify-content:space-between;gap:12px}.site-header nav a{font-size:14px;min-height:40px}.languages a{min-width:36px;min-height:44px}.hero{display:flex;flex-direction:column;padding-top:34px;gap:24px}.hero h1{font-size:clamp(44px,13vw,80px);margin:25px 0 23px;letter-spacing:-.065em}.hero .eyebrow{font-size:10px;max-width:none;letter-spacing:.08em}.hero .intro{font-size:17px;max-width:440px}.hero-actions{gap:14px;margin-top:24px}.hero-actions>span{font-size:11px;max-width:130px}.hero-actions .button{min-height:50px;padding:12px 19px}.antenna-lab{width:100%;max-width:480px;margin-top:12px;align-self:center}.antenna-lab>figcaption{font-size:10px}.plot{margin-top:10px}.lab-bottom{margin-top:0;max-width:350px}.band-switch{gap:6px}.band-switch button{min-width:62px;font-size:13px;padding:9px 14px}.hero-bottom{margin-top:9px;flex-direction:column;gap:8px;padding:20px 0}.hero-bottom>span{font-size:10px}.hero-bottom p{font-size:13px}.manifesto{grid-template-columns:1fr;padding:22px var(--pad);gap:12px;font-size:18px}.section{padding:59px var(--pad)}.section-heading h2{font-size:39px;margin-bottom:22px}.section-heading .eyebrow{font-size:10px;margin-bottom:22px}.lead{font-size:17px}.showcase{display:flex;flex-direction:column;gap:20px;margin-top:30px}.showcase-text{width:100%}.showcase-tabs{display:grid;grid-template-columns:1fr 1fr}.showcase-tabs button{font-size:14px;min-height:66px;gap:9px;padding:13px 8px 13px 0;letter-spacing:-.025em}.showcase-tabs button:nth-child(even){padding-left:14px;border-left:1px solid #20252c26}.showcase-tabs button>span:first-child{font-size:10px;min-width:15px}.showcase-tabs .tab-mark{display:none}.showcase-description{min-height:0;padding-top:20px}.showcase-description p{font-size:16px;margin-bottom:10px}.showcase-image{width:100%;padding:26px 10px 8px}.device{width:270px;max-width:92%;border-radius:40px;border-width:5px}.showcase-image:before{inset:15% -2% 15%;max-width:420px;margin:auto}.toolkit .section-heading{display:block}.toolkit .section-heading h2{margin-bottom:23px}.tool-grid{grid-template-columns:1fr;margin-top:32px;margin-bottom:28px}.tool-card{min-height:0;padding:27px 25px;display:grid;grid-template-columns:36px 1fr;gap:15px 22px}.tool-card svg{width:32px;height:32px;grid-row:1/3;margin-bottom:0}.tool-number{display:none}.tool-card h3{font-size:22px;max-width:none;margin-bottom:0;line-height:1.25}.tool-card p{font-size:16px;grid-column:2}.toolkit .button{width:100%}.personal{display:flex;flex-direction:column;gap:35px;padding-top:0}.personal h2{font-size:40px;margin:23px 0}.personal .eyebrow{font-size:10px}.palette-demo{width:100%;padding:22px}.palette-head{font-size:13px}.palette-controls button{font-size:13px}.spectrum-bars{height:240px;gap:5px}.promise{gap:30px}.promise .eyebrow{font-size:10px}.promise h2{font-size:42px}.promise-copy{font-size:17px}.promise .actions{gap:17px}.source-wrap{padding-top:36px;padding-bottom:36px}.source-note{display:block}.source-note>span{display:block;margin-bottom:16px}.source-note a{overflow-wrap:anywhere}.footer{padding:30px var(--pad) 22px}.footer-top{flex-direction:column;gap:18px;padding-bottom:23px}.wordmark{font-size:39px}.footer-top p{max-width:none;font-size:13px}.footer-bottom{align-items:flex-start;gap:10px}.footer-bottom nav{gap:9px 21px;order:1;width:100%;font-size:13px}.footer-bottom>span{order:2;align-self:center}.motion{order:3;margin-left:auto;font-size:11px}.page-hero{padding-top:37px;padding-bottom:40px}.page-hero h1{font-size:clamp(41px,10vw,62px);margin:25px 0}.page-hero .eyebrow{font-size:10px}.support-body{padding-top:28px}.search input{font-size:16px;min-height:56px;padding-left:17px}.topic-tabs{gap:7px}.topic-tabs button{font-size:13px;padding:9px 13px}.help-toolbar{gap:20px;margin-bottom:22px}.faq-list summary{font-size:18px;gap:18px;padding:22px 0}.faq-list p{font-size:16px}.contact{grid-template-columns:1fr;padding:44px 0 35px;margin-top:34px;gap:25px}.contact h2{font-size:35px}.report-kit{padding:23px}.report-kit p{font-size:16px}.report-kit .button{font-size:14px;width:100%}.guide-banner{padding:22px;display:flex;flex-direction:column;align-items:flex-start;gap:13px}.guide-banner h3{font-size:25px}.guide-body{padding-top:24px}.guide-search{margin-bottom:24px}.guide-layout{display:flex;flex-direction:column;gap:30px}.feature-nav{position:relative;top:0;width:100%;display:grid;grid-template-columns:1fr 1fr;max-height:245px;gap:18px;padding:18px;background:#1d2531;border:1px solid var(--line);border-radius:4px;overscroll-behavior:contain}.feature-nav h2{font-size:11px;line-height:1.6}.feature-nav a{font-size:13px;line-height:1.5;min-height:44px;padding:8px}.guide-detail{display:flex;flex-direction:column;gap:24px;width:100%;scroll-margin-top:22px}.guide-description h2{font-size:33px}.guide-capture{max-width:290px;width:100%;margin:0 auto}.guide-capture .device{max-width:100%;border-radius:40px}.guide-note{padding:20px;margin-top:40px;font-size:14px}.privacy-layout{display:block;padding-top:28px}.privacy-layout>aside{position:static;border-bottom:1px solid var(--line);padding-bottom:24px;margin-bottom:30px}.privacy-layout aside nav{display:grid;grid-template-columns:1fr 1fr;gap:5px 15px;margin-top:15px}.privacy-layout aside a{font-size:13px;align-items:flex-start;padding:9px 0;gap:10px}.privacy-article .updated{font-size:12px;margin-bottom:28px}.privacy-article h2{font-size:28px}.privacy-article section>p:last-child{font-size:16px}.privacy-article section{margin-bottom:26px;padding-bottom:27px}dialog{padding:10px 15px;width:95vw}.dialog-toolbar{margin-bottom:10px}.dialog-toolbar+img{max-height:72dvh}.nojs-guide h2{font-size:27px}html[lang=zh-Hans] .hero h1{font-size:clamp(49px,11.5vw,69px);letter-spacing:-.055em;line-height:1.16}html[lang=zh-Hans] h2{line-height:1.2}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}.js-reveal{opacity:1;transform:none}}[data-paused=true] .js-reveal{opacity:1;transform:none;transition:none}
/* Pausing motion must never freeze entrance animations with content hidden. */
[data-paused=true] .hero-text,[data-paused=true] .page-hero,[data-paused=true] .sectors{animation:none!important;opacity:1;transform:none}.sectors{animation:none}

@keyframes enter{from{transform:translateY(12px)}to{transform:translateY(0)}}
.platforms{background:#e7ebf0;color:#20252c;margin-bottom:90px;color-scheme:light}.platforms .lead{color:#5c687b;max-width:620px}.platform-tabs{display:flex;gap:8px;margin-top:36px;border-bottom:1px solid #20252c35;padding-bottom:24px}.platform-tabs button{min-height:48px;min-width:100px;padding:10px 22px;border:1px solid #20252c50;border-radius:4px;font-size:15px}.platform-tabs button[aria-pressed=true]{background:#0064c8;border-color:#0064c8;color:#fff}.platform-stage{display:grid;grid-template-columns:1fr 2fr;gap:50px;align-items:center;padding-top:40px}.platform-copy h3{font-size:clamp(30px,3vw,44px);line-height:1.15;margin:20px 0}.platform-copy p:not(.eyebrow){font-size:17px;color:#566274;line-height:1.8}.compatibility{display:block;font-size:13px;line-height:1.7;margin-top:24px;color:#566274;border-top:1px solid #20252c30;padding-top:18px}.platform-image .device{width:100%;max-width:none;border-radius:24px;border-width:5px;box-shadow:0 22px 48px #20252c26}.platform-image.iphone .device{max-width:265px;margin:auto;border-radius:39px}.platform-image.mac .device{border-radius:8px;border-width:1px;box-shadow:0 24px 45px #20252c26}.guide-detail:not(:has(.guide-capture)){grid-template-columns:1fr}.guide-detail:not(:has(.guide-capture)) .guide-description{max-width:650px}
@media(max-width:850px){.platform-stage{grid-template-columns:1fr;gap:35px}.platform-copy{max-width:650px}.platform-copy h3{font-size:35px}.platforms{margin-bottom:70px}.platform-image.iphone .device{max-width:265px}.platform-image .device{max-width:760px;margin:auto}}
@media(max-width:620px){.platforms{margin-bottom:59px}.platform-tabs{margin-top:28px;gap:8px;padding-bottom:20px}.platform-tabs button{min-width:0;flex:1;padding:10px 15px;font-size:14px}.platform-stage{padding-top:28px}.platform-copy h3{font-size:32px}.platform-image .device{border-width:3px;border-radius:13px}.platform-image.iphone .device{border-radius:39px}.compatibility{font-size:13px}.feature-nav a{font-size:14px}.site-header nav a{min-height:44px}}
.platform-stage:not(:has(.platform-image)){grid-template-columns:1fr;max-width:880px}.platform-stage:not(:has(.platform-image)) .platform-copy{max-width:760px}

.device.wide{width:100%;max-width:none;border-radius:22px;border-width:4px}.showcase:has(.device.wide){grid-template-columns:minmax(280px,1fr) minmax(0,1.8fr);gap:5%}.showcase-image:has(.wide){padding-inline:0}.guide-detail:has(.wide){grid-template-columns:1fr}.guide-capture:has(.wide){max-width:100%;width:100%;margin-top:20px}.guide-capture .device.wide{border-radius:22px;width:100%}dialog:has(img[data-wide=true]){width:min(95vw,1300px)}
@media(max-width:900px){.showcase:has(.device.wide){grid-template-columns:1fr}.showcase:has(.wide) .showcase-text{max-width:none}.device.wide{border-radius:16px}}
@media(max-width:620px){.device.wide,.guide-capture .device.wide{border-radius:12px;border-width:3px}.showcase-image:has(.wide){padding:22px 0 8px}}

h1,h2,h3{text-wrap:balance}

/* Portrait product screenshots share one consistent frame. */
.platform-image.ipad .device.portrait{width:min(100%,400px);margin-inline:auto}

/* Preview controls select independently captured native app states. */
.showcase-controls{display:flex;flex-wrap:wrap;gap:18px;margin:0 0 24px;color:var(--ink);font-size:13px}
.showcase-style{flex:1 1 160px;max-width:260px}
.showcase-style>span,.showcase-appearance legend{display:block;margin-bottom:8px;color:#626c79;font-size:12px}
.showcase-style select{width:100%;min-height:44px;padding:8px 12px;border:1px solid #8390a480;border-radius:10px;background:#fafbfc;color:var(--ink);cursor:pointer}
.showcase-appearance{border:0;padding:0;margin:0;min-width:145px}
.showcase-appearance>div{display:flex;border:1px solid #8390a480;border-radius:10px;overflow:hidden}
.showcase-appearance button{min-height:44px;padding:8px 16px;flex:1;background:transparent;color:var(--ink)}
.showcase-appearance button[aria-pressed=true]{background:var(--action);color:var(--on-accent)}
.showcase-appearance button:focus-visible{outline:2px solid #0064c8;outline-offset:-4px}
@media(max-width:620px){.showcase-controls{gap:14px}.showcase-style{max-width:none}.showcase-appearance button{padding-inline:14px}}

/* Small links on pale surfaces use the deeper action blue for readable contrast. */
.experience .inline-link,.platforms .inline-link,.promise .inline-link{color:var(--action);text-decoration-color:currentColor}
.experience .inline-link:hover,.platforms .inline-link:hover,.promise .inline-link:hover{color:#005cba}

/* Author credit belongs with the brand on every page, separate from navigation. */
.footer-brand{min-width:0}
.footer-top .footer-credit{display:flex;align-items:baseline;flex-wrap:wrap;gap:6px 12px;max-width:none;margin-top:14px;font-size:13px;color:var(--muted)}
.footer-credit .authors{color:var(--text)}

/* The data-quality report keeps every category visible, with real snapshot counts. */
.site-header nav{gap:clamp(16px,2vw,32px)}
.quality-teaser{display:grid;grid-template-columns:1.2fr 1fr;gap:8%;border-top:1px solid var(--line)}
.quality-teaser h2{font-size:clamp(36px,4vw,60px);margin:22px 0}.quality-teaser p:not(.eyebrow){color:var(--muted);margin-bottom:24px}
.quality-teaser-number{display:flex;flex-direction:column;justify-content:center;gap:10px}.quality-teaser-number strong{font-size:clamp(46px,5vw,86px);font-weight:500;letter-spacing:-.055em;color:var(--accent);line-height:1.15;font-variant-numeric:tabular-nums}.quality-teaser-number span{color:var(--muted)}
.quality-overview{padding-top:55px;padding-bottom:48px}.quality-metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px}.quality-metric{display:flex;flex-direction:column;gap:12px;border-top:1px solid var(--line);padding-top:22px}.quality-metric strong{font-size:clamp(30px,3.6vw,62px);font-weight:500;letter-spacing:-.04em;line-height:1.2;color:var(--accent);font-variant-numeric:tabular-nums;white-space:nowrap}.quality-metric span{color:var(--muted);font-size:14px;max-width:24ch}.quality-scope{font-size:14px;color:var(--muted);max-width:100ch;margin-top:36px}.quality-dates{display:flex;flex-wrap:wrap;gap:18px 45px;margin:24px 0 32px;font-size:13px;color:var(--muted)}.quality-dates div{display:flex;flex-wrap:wrap;gap:5px 15px}.quality-dates dd{margin:0;color:var(--text)}.quality-jump{display:flex;flex-wrap:wrap;gap:10px 28px}.quality-jump a{display:flex;align-items:center;gap:14px;min-height:44px;color:var(--accent);font-size:14px;border-bottom:1px solid var(--line)}.quality-jump span{color:var(--muted);font-variant-numeric:tabular-nums}
.quality-register{background:var(--paper);color:var(--ink);padding-top:65px;padding-bottom:65px}.quality-section-heading{max-width:850px;margin-bottom:38px}.quality-section-heading h2{font-size:clamp(36px,4.5vw,64px);margin:18px 0}.quality-section-heading>p:last-child{color:#59616d;font-size:17px;line-height:1.7}.quality-list{list-style:none;margin:0;padding:0}.quality-list li{display:grid;grid-template-columns:34px minmax(0,1fr) minmax(115px,180px);align-items:center;gap:25px;padding:24px 0;border-top:1px solid #20252c26}.quality-list li:last-child{border-bottom:1px solid #20252c26}.quality-index{align-self:start;font-size:12px;color:#59616d;padding-top:5px;font-variant-numeric:tabular-nums}.quality-row-copy h3{font-size:22px;font-weight:550;line-height:1.35;letter-spacing:-.025em}.quality-row-copy p{color:#59616d;font-size:15px;margin-top:7px;line-height:1.6}.quality-count{text-align:right;display:flex;flex-direction:column;gap:3px}.quality-count strong{font-size:32px;font-weight:500;line-height:1.2;letter-spacing:-.025em;color:var(--action);font-variant-numeric:tabular-nums;white-space:nowrap}.quality-count span{font-size:12px;color:#59616d}.quality-warning-section{background:var(--surface)}.quality-warnings .quality-count strong{color:#8a4a09}
.quality-method{display:grid;grid-template-columns:1fr 1fr;gap:8%;border-bottom:1px solid var(--line)}.quality-method h2{font-size:clamp(28px,3vw,44px);margin:20px 0}.quality-method p:not(.eyebrow){color:var(--muted);font-size:17px}.quality-method>div:last-child{padding-top:20px}
.quality-invitation{background:var(--paper);color:var(--ink)}.quality-invitation h2{font-size:clamp(40px,5vw,76px);margin:24px 0;max-width:1100px}.quality-invitation>p:not(.eyebrow){font-size:18px;color:#59616d;max-width:85ch;margin-bottom:30px}.quality-email{display:inline-flex;align-items:center;min-height:44px;margin-left:24px;color:var(--action);font-size:15px}.source-wrap>.inline-link{display:inline-block;margin-top:24px}
@media(max-width:1050px){.site-header{gap:18px}.header-end{gap:16px}.site-header nav{gap:16px}.site-header nav a{font-size:14px}.quality-metrics{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}.quality-metric strong{font-size:48px}}
@media(max-width:850px){.site-header{flex-wrap:wrap;height:auto;min-height:110px;padding-top:14px;padding-bottom:10px}.header-end{margin-left:auto}.site-header nav{order:3;flex-basis:100%;justify-content:space-between;gap:12px}.quality-teaser{grid-template-columns:1fr;gap:28px}.quality-teaser-number strong{font-size:56px}.quality-list li{gap:18px;grid-template-columns:24px minmax(0,1fr) 125px}.quality-count strong{font-size:28px}.quality-method{grid-template-columns:1fr;gap:25px}}
@media(max-width:620px){.site-header{min-height:115px}.site-header nav{gap:8px;flex-wrap:wrap}.site-header nav a{font-size:13px}.quality-overview{padding-top:32px;padding-bottom:35px}.quality-metrics{gap:25px 16px}.quality-metric strong{font-size:clamp(25px,7vw,39px)}.quality-metric span{font-size:12px;line-height:1.6}.quality-scope{font-size:13px;margin-top:27px}.quality-dates{gap:14px;margin-bottom:20px}.quality-jump{gap:10px 20px}.quality-jump a{font-size:13px}.quality-register{padding-top:42px;padding-bottom:42px}.quality-section-heading>p:last-child{font-size:16px}.quality-list li{position:relative;grid-template-columns:minmax(0,1fr) 92px;align-items:start;gap:14px;padding:20px 0}.quality-index{display:none}.quality-row-copy h3{font-size:18px;line-height:1.4}.quality-row-copy p{font-size:14px;margin-top:9px}.quality-count strong{font-size:24px}.quality-count{padding-top:1px}.quality-count span{font-size:11px}.quality-method h2{font-size:30px}.quality-method p:not(.eyebrow){font-size:16px}.quality-invitation h2{font-size:37px}.quality-invitation>p:not(.eyebrow){font-size:16px}.quality-invitation .button{width:100%;font-size:14px}.quality-email{margin:15px 0 0;overflow-wrap:anywhere}.quality-teaser h2{font-size:35px}.quality-teaser-number strong{font-size:50px}.quality-teaser-number span{font-size:14px}}
@media(max-width:620px){.site-header nav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.site-header nav a{justify-content:center;text-align:center;line-height:1.5}}