:root{--paper:#fff;--ink:#171c27;--muted:#566073;--blue:#315bff;--blue-dark:#2345ce;--blue-soft:#edf1ff;--surface:#f3f5f8;--dark:#171f32;--on-dark:#fff;--space:clamp(24px,4.5vw,72px);--max:1320px;--ease:cubic-bezier(.16,1,.3,1);--body:17px;--small:14px;--sub:26px;--heading:clamp(32px,4.1vw,60px);--display:clamp(40px,5.6vw,82px)}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:32px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:var(--body);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;text-underline-offset:5px}
a:hover{text-decoration:underline}
button,input{font:inherit}
button,a{-webkit-tap-highlight-color:transparent}
button{cursor:pointer}
img{display:block;max-width:100%;height:auto}
svg{display:block}
h1,h2,h3,p,figure{margin:0}
h1,h2,h3{text-wrap:balance}
h1{font-size:var(--display);font-weight:650;line-height:1.2;letter-spacing:-.055em}
h2{font-size:var(--heading);font-weight:630;line-height:1.25;letter-spacing:-.04em}
h3{font-size:var(--sub);font-weight:600;line-height:1.4;letter-spacing:-.02em}
p{text-wrap:pretty}
ul,ol{padding:0;margin:0}
::selection{background:var(--blue);color:var(--paper)}
:focus-visible{outline:3px solid currentColor;outline-offset:6px}
[hidden]{display:none!important}
.wrap{width:min(calc(100% - var(--space)*2),var(--max));margin-inline:auto}
.section{padding-block:112px}
.site-header{min-height:96px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:inline-flex;align-items:center;gap:12px;font-size:var(--sub);line-height:1.2;font-weight:650;white-space:nowrap}
.brand img{width:36px;height:36px;object-fit:contain;border-radius:8px}
.brand-en{font-size:var(--body);font-weight:500;margin-left:4px}
.site-header nav{display:flex;gap:36px;align-items:center}
.site-header nav a{padding-block:12px}
.button{display:inline-flex;align-items:center;justify-content:center;gap:24px;min-height:54px;padding:12px 25px;background:var(--blue);color:var(--paper);font-weight:550;border:0;border-radius:0;transition:transform 180ms var(--ease),background-color 180ms}
.button:hover{text-decoration:none;background:var(--blue-dark);transform:translateY(-2px)}
.button:active{transform:translateY(1px)}
.button.small{min-height:46px;padding:8px 19px}
.button.light{color:var(--blue);background:var(--paper)}
.button.light:hover{background:var(--blue-soft)}
.skip-link{position:absolute;left:var(--space);top:8px;transform:translateY(-160%);background:var(--ink);color:var(--paper);z-index:20;padding:10px 18px}
.skip-link:focus{transform:none}

.hero{background:var(--blue);color:var(--on-dark)}
.hero-main{min-height:650px;display:grid;grid-template-columns:1.48fr 1fr;align-items:center;gap:45px;padding-block:56px 64px}
.hero-copy{position:relative;z-index:1}
.hero-copy>p{margin-top:30px;max-width:530px;font-size:var(--body);line-height:1.8}
.hero-actions{display:flex;align-items:center;gap:28px;margin-top:34px}
.hero-copy .hero-note{font-size:var(--small);margin-top:28px}
.hero-photo{align-self:center;position:relative;transform:rotate(4deg);max-width:440px}
.hero-photo img{width:100%;height:480px;object-fit:cover;border-radius:180px 180px 0 0;object-position:45% center}
.hero-photo figcaption{font-size:var(--small);margin-top:14px;text-align:center}
.hero-base{background:var(--blue-soft);color:var(--ink)}
.provider-row{display:flex;gap:24px;justify-content:space-between;align-items:center;padding-block:28px}
.provider-row p{font-size:var(--small)}
.provider-row ul{list-style:none;display:flex;gap:40px;font-weight:550}
.section-heading{display:flex;gap:42px;justify-content:space-between;align-items:flex-end;margin-bottom:44px}
.section-heading p{max-width:430px}
.scene-tabs{display:inline-flex;background:var(--surface);padding:6px;margin-bottom:36px;gap:6px}
.scene-tabs button{border:0;background:transparent;color:var(--muted);padding:12px 25px;min-height:48px;transition:background-color 180ms,color 180ms}
.scene-tabs button[aria-selected=true]{background:var(--ink);color:var(--paper)}
.scene-tabs button:hover{background:var(--blue-soft);color:var(--blue)}
.scene-tabs button[aria-selected=true]:hover{background:var(--ink);color:var(--paper)}
.scene-panel{display:grid;grid-template-columns:.85fr 1.15fr;gap:80px;align-items:center}
.scene-copy h3{font-size:var(--heading);line-height:1.35}
.scene-copy>p{margin-top:24px;max-width:410px}
.feature-list{list-style:disc;padding-left:20px;margin-block:25px;display:grid;gap:12px}
.feature-list li{padding-left:3px}
.feature-list li::marker{color:var(--blue)}
.note,.scene-copy>.note{font-size:var(--small);color:var(--muted)}
.text-link{display:inline-block;font-weight:550;text-decoration:underline;text-decoration-thickness:2px;margin-top:24px}
.screens-stage{background:var(--surface);display:flex;gap:24px;align-items:center;justify-content:center;padding:36px 24px}
.screens-stage figure{width:46%;max-width:240px}
.screens-stage img{width:100%;aspect-ratio:1206/2622;object-fit:cover}
.screens-stage figcaption{font-size:var(--small);margin-top:14px;text-align:center}
.screenshot-note{margin-top:24px;color:var(--muted);font-size:var(--small);text-align:right}
.desktop-scene{margin-top:32px}
.scene-tabs:not([hidden])~.desktop-scene{margin-top:0}
.folder-stage{background:var(--surface);padding:38px;min-height:530px;display:flex;flex-direction:column;justify-content:center}
.folder-source{display:grid;gap:12px}
.folder-source>span{font-size:var(--small);color:var(--muted);margin-bottom:8px}
.folder-source>div{display:flex;align-items:center;gap:18px;background:var(--paper);padding:14px 20px}
.folder-source svg{width:38px;height:32px;fill:var(--blue)}
.folder-target{margin-top:24px;background:var(--blue);color:var(--on-dark);padding:24px}
.folder-target span,.folder-target p{font-size:var(--small)}
.folder-target strong{font-size:var(--sub);display:block;margin-block:4px}
.diagram-caption{font-size:var(--small);color:var(--muted);margin-top:20px}

.recovery{background:var(--dark);color:var(--on-dark);padding-block:100px}
.recovery-inner{display:grid;grid-template-columns:1.1fr 1fr;gap:100px;align-items:center}
.recovery h2{font-size:var(--heading)}
.recovery-copy>p{font-size:var(--body);max-width:500px}
.recovery dl{display:grid;gap:24px;margin-block:32px 0}
.recovery dt{font-weight:600;margin-bottom:5px}
.recovery dd{margin:0;color:#d0d7e6}
.ownership{display:grid;grid-template-columns:.8fr 1.2fr;gap:80px;align-items:center}
.ownership-copy p{margin-top:26px;max-width:410px}
.photo-contact-sheet{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}
.photo-contact-sheet figure:first-child{grid-row:span 2;align-self:center}
.photo-contact-sheet figure:first-child img{aspect-ratio:3/4}
.photo-contact-sheet img{width:100%;aspect-ratio:1.7;object-fit:cover}
.photo-contact-sheet figcaption{font-size:var(--small);margin-top:8px}
.start{background:var(--surface)}
.start-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:48px;list-style-position:inside;margin-bottom:40px;counter-reset:none}
.start-steps li::marker{font-weight:600;color:var(--blue)}
.start-steps h3{display:inline;font-size:var(--sub)}
.start-steps p{margin-top:18px}
.release-note{background:var(--blue-soft);padding:24px 30px;display:grid;grid-template-columns:175px 1fr;gap:22px;margin-bottom:24px}
.release-note strong{font-size:var(--body)}
.release-note p{font-size:var(--small);color:var(--muted)}
.release-note a{text-decoration:underline;color:var(--blue);white-space:nowrap}
.download-list article{display:grid;grid-template-columns:1fr 1fr auto;align-items:center;gap:30px;padding:30px}
.download-list article:nth-child(even){background:var(--surface)}
.platform-name p,.platform-detail p{font-size:var(--small);margin-top:4px;color:var(--muted)}
.platform-detail strong{font-weight:500}
.download-link{color:var(--blue);font-size:var(--small);padding-block:12px;display:inline-flex;gap:16px;align-items:center}
.downloads>.note{margin-top:24px}
.note a{text-decoration:underline}
.faq{background:var(--surface)}
.faq-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:80px}
.faq-list{display:grid;gap:12px}
.faq details{background:var(--paper);padding:0 26px}
.faq summary{font-size:var(--body);font-weight:550;cursor:pointer;list-style:none;padding:23px 32px 23px 0;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";position:absolute;right:0;font-size:var(--sub);line-height:1.2;font-weight:400;top:23px}
.faq details[open] summary:after{content:"−"}
.faq details p{padding-bottom:26px;color:var(--ink);font-size:var(--body)}
.closing{background:var(--blue);color:var(--on-dark)}
.closing-link{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;padding-block:80px;transition:transform 300ms var(--ease)}
.closing-link h2{font-size:var(--display)}
.closing-link>span{font-size:var(--sub);padding-bottom:6px}
.closing-link:hover{text-decoration:none;transform:translateY(-3px)}
.site-footer{padding-top:50px;overflow:hidden}
.footer-top{display:flex;align-items:center;justify-content:space-between;gap:24px}
.footer-top p,.footer-top>a:last-child{font-size:var(--small)}
.footer-links{display:flex;align-items:center;flex-wrap:wrap;gap:28px;margin-top:30px;font-size:var(--small);color:var(--muted)}
.footer-links span{margin-left:auto}
.footer-wordmark{font-size:clamp(60px,16.9vw,238px);font-weight:600;letter-spacing:-.07em;line-height:1.12;margin-top:42px;padding-bottom:10px}

.doc-header{background:var(--surface)}
.doc-main{max-width:900px;padding-block:64px 100px}
.doc-main h1{font-size:clamp(36px,5vw,60px);margin-bottom:24px}
.doc-lead{font-size:var(--sub)}
.doc-nav{display:flex;gap:18px;flex-wrap:wrap;background:var(--blue-soft);padding:22px;margin-block:35px 55px}
.doc-nav a{color:var(--blue);padding:5px}
.doc-section{margin-top:60px;scroll-margin-top:35px}
.doc-section h2{font-size:var(--heading);margin-bottom:24px}
.doc-section h3{font-size:var(--sub);margin-block:26px 14px}
.doc-section p{margin-block:16px}
.doc-section ul,.doc-section ol{padding-left:24px;display:grid;gap:10px}
.doc-section a{color:var(--blue);text-decoration:underline}
.doc-callout{padding:22px 26px;background:var(--surface);margin-block:26px}
.doc-callout strong{display:block}
.doc-footer{background:var(--surface);padding-block:30px}
.doc-footer .wrap{display:flex;flex-wrap:wrap;gap:30px;justify-content:space-between}
.doc-credits li{overflow-wrap:anywhere}
.doc-section code{font-size:var(--small);background:var(--surface);padding:2px 5px;overflow-wrap:anywhere}
.doc-section img{max-width:260px}

@media(min-width:1500px){.hero-main{min-height:700px}
.hero-photo{max-width:470px}
.hero-photo img{height:520px}
}

@media(max-width:1000px){:root{--space:32px;--display:56px}
.site-header nav{gap:22px}
.brand-en{display:none}
.hero-main{min-height:590px;gap:24px;grid-template-columns:1.25fr 1fr}
.hero-photo img{height:400px}
.hero-copy>p{font-size:var(--body)}
.hero-actions{gap:18px;flex-wrap:wrap}
.provider-row{gap:18px;align-items:flex-start;flex-direction:column}
.provider-row ul{gap:32px}
.scene-panel{gap:36px;grid-template-columns:1fr 1fr}
.screens-stage{padding:24px 16px;gap:14px}
.screens-stage .secondary-screen{display:none}
.screens-stage figure{width:100%;max-width:250px}
.recovery-inner,.ownership,.faq-grid{gap:40px}
.download-list article{gap:18px;padding-inline:22px;grid-template-columns:1fr 1fr}
.download-link{grid-column:2}
.section{padding-block:80px}
.section-heading{align-items:flex-start;gap:26px}
.section-heading p{max-width:310px}
.start-steps{gap:28px}
.release-note{grid-template-columns:1fr;gap:10px}
.footer-top{flex-wrap:wrap}
.photo-contact-sheet{gap:14px}
.folder-stage{padding:24px;min-height:470px}
.hero-photo figcaption{font-size:var(--small)}
}

@media(max-width:700px){:root{--space:22px;--display:clamp(34px,8.6vw,46px);--body:16px;--sub:22px;--heading:32px}
.site-header{min-height:80px;gap:12px}
.brand{font-size:var(--sub);gap:8px}
.brand img{width:31px;height:31px}
.site-header nav{display:none}
.button.small{font-size:var(--small);padding:9px 14px;gap:16px;min-height:44px}
.hero-main{grid-template-columns:1fr;gap:34px;padding-block:44px 38px;min-height:0}
.hero-copy>p{font-size:var(--body);margin-top:24px;max-width:340px}
.desktop-break{display:none}
.hero-actions{margin-top:26px;gap:22px;flex-wrap:nowrap;font-size:var(--small)}
.hero-actions .button{padding:12px 18px;gap:14px;min-height:50px}
.hero-copy .hero-note{margin-top:20px;font-size:var(--small)}
.hero-photo{width:72%;justify-self:end;margin-right:8px;max-width:330px;transform:rotate(3deg)}
.hero-photo img{height:260px;border-radius:120px 120px 0 0;object-position:center}
.hero-photo figcaption{font-size:var(--small)}
.provider-row{padding-block:23px;gap:12px}
.provider-row p{font-size:var(--small)}
.provider-row ul{gap:20px;font-size:var(--small);flex-wrap:wrap}
.section{padding-block:64px}
.section-heading{display:block;margin-bottom:28px}
.section-heading p{margin-top:22px;max-width:none}
.scene-tabs{margin-bottom:28px;display:flex}
.scene-tabs button{flex:1;padding:10px 16px}
.scene-panel{grid-template-columns:1fr;gap:30px}
.scene-copy h3{font-size:var(--heading)}
.scene-copy>p{margin-top:20px;max-width:none}
.feature-list{margin-block:22px}
.screens-stage{padding:26px 18px}
.screens-stage .secondary-screen{display:block}
.screens-stage figure{width:46%}
.screens-stage{gap:14px}
.screens-stage figcaption{font-size:var(--small)}
.screenshot-note{text-align:left;font-size:var(--small)}
.recovery{padding-block:60px}
.recovery-inner{grid-template-columns:1fr;gap:30px}
.recovery h2{font-size:var(--heading)}
.recovery-copy>p{font-size:var(--body)}
.recovery dl{gap:22px}
.ownership{grid-template-columns:1fr;gap:36px}
.ownership-copy p{max-width:none;margin-top:22px}
.photo-contact-sheet figcaption{font-size:var(--small)}
.start-steps{grid-template-columns:1fr;gap:30px;margin-bottom:30px}
.start-steps p{margin-top:10px}
.start-steps h3{font-size:var(--sub)}
.release-note{padding:22px}
.download-list article{padding:25px 20px;grid-template-columns:1fr;gap:14px}
.download-link{grid-column:auto;font-size:var(--small);justify-self:start;padding:8px 0}
.platform-name h3{font-size:var(--sub)}
.platform-detail strong{font-size:var(--body)}
.faq-grid{grid-template-columns:1fr;gap:30px}
.faq summary{font-size:var(--body);padding-block:21px;line-height:1.7}
.faq summary:after{top:22px}
.faq details{padding-inline:20px}
.closing-link{padding-block:55px;display:block}
.closing-link h2{font-size:var(--heading)}
.closing-link>span{display:block;margin-top:28px;font-size:var(--body)}
.site-footer{padding-top:35px}
.footer-top{gap:22px}
.footer-top p{order:3;width:100%}
.footer-top>a:last-child{margin-left:auto}
.footer-links{gap:18px 24px}
.footer-links span{margin-left:0}
.footer-wordmark{font-size:17vw;margin-top:35px}
.doc-main{padding-block:45px 70px}
.doc-main h1{font-size:var(--heading)}
.doc-lead{font-size:var(--body)}
.doc-section{margin-top:45px}
.doc-section h2{font-size:28px}
.doc-nav{gap:10px 18px;margin-block:28px 40px;padding:18px}
.doc-footer .wrap{gap:20px}
.folder-stage{min-height:0;padding:24px}
.folder-target strong{font-size:var(--sub)}
}

@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}
*,*:before,*:after{animation:none!important;transition:none!important}
.hero-photo{transform:none}
}


.mobile-menu{display:none;position:relative;margin-left:auto}
.mobile-menu summary{cursor:pointer;list-style:none;padding:10px;font-size:var(--small)}
.mobile-menu summary::-webkit-details-marker{display:none}
.mobile-menu nav{position:absolute;right:-60px;top:48px;min-width:190px;padding:14px;background:var(--paper);color:var(--ink);z-index:10;}
.site-header .mobile-menu nav{display:flex;flex-direction:column;align-items:stretch;gap:0}
.mobile-menu nav a{padding:12px}
.screens-stage figcaption a{text-decoration:underline}
@media(max-width:700px){.mobile-menu{display:block}
.brand{font-size:20px}
.brand-en{display:none}
}


.mobile-menu:not([open]) nav{display:none}