@charset "UTF-8";
:root{--violet:#5d43a6;--acid:#c8f267;--dark:#17131f;--paper:#f7f6fb;--ink:#25202e;--muted:#706b79;--line:#ddd8e7;--shell:min(1180px,calc(100% - 40px))}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;background:var(--paper);color:var(--ink)}img{display:block;max-width:100%}a{text-decoration:none;color:inherit}.shell{width:var(--shell);margin:auto}
.header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30}.nav{height:70px;display:grid;grid-template-columns:190px 1fr auto;align-items:center;gap:24px}.brand img{max-height:36px;width:auto}.nav nav{display:flex;justify-content:center;gap:24px;font-size:12px;color:#716b7b}.nav-cta{background:var(--violet);color:#fff;padding:11px 17px;font-size:12px;font-weight:900}
.hero{padding:62px 0;background:linear-gradient(145deg,#eeeaf9,#e7f0dc)}.hero-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;align-items:center;min-height:570px}.eyebrow,.section-title span,.steps-copy>span,.no-version-grid>div>span,.after-grid>div>span,.faq-title span{display:block;font-size:9px;letter-spacing:.16em;color:#7054b7;font-weight:900;margin-bottom:13px}.hero h1{font-size:clamp(58px,7vw,94px);line-height:.9;letter-spacing:-.06em;margin:18px 0 22px}.lead{font-size:17px;line-height:1.85;color:#4e4758}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:25px}.primary,.secondary,.version-cards a{font-size:12px;font-weight:900}.primary{background:var(--violet);color:#fff;padding:14px 18px}.secondary{background:#fff;border:1px solid #cec4e3;padding:13px 18px}
.version-stage{background:var(--dark);color:#fff;min-height:500px;padding:18px 24px 44px;display:flex;flex-direction:column}.version-line{display:grid;grid-template-columns:auto 1fr auto 1fr auto 1fr auto;gap:10px;align-items:center;height:40px;font-size:8px;letter-spacing:.12em;color:#777080}.version-line i{height:1px;background:#38313f}.version-stage figure{margin:15px 0 0;flex:1;display:grid;place-items:center}.version-stage img{max-height:370px;width:auto;object-fit:contain}.version-note{font-size:8px;letter-spacing:.11em;color:#827989;border-top:1px solid #332d39;padding-top:12px}
.versions{padding:88px 0;background:#fff}.section-title{max-width:850px;margin-bottom:32px}.section-title h2,.steps-copy h2,.no-version-grid h2,.after-grid h2,.faq-title h2{font-size:clamp(34px,4vw,52px);line-height:1.08;letter-spacing:-.045em;margin:0}.section-title p{font-size:13px;line-height:1.8;color:var(--muted)}.version-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.version-cards article{min-height:300px;padding:22px;display:flex;flex-direction:column;border:1px solid var(--line)}.version-cards article.android{background:#e9f4df}.version-cards article.apple{background:#efeaf8}.version-cards article.windows{background:#e8eef6}.version-cards b{font-size:9px;letter-spacing:.13em;color:#665c70}.version-cards h3{font-size:22px;margin:48px 0 9px}.version-cards p{font-size:12px;line-height:1.75;color:var(--muted)}.version-cards a{margin-top:auto;background:#221b2e;color:#fff;padding:12px;text-align:center}
.preview{padding:90px 0;background:#f3f0f9}.preview-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.preview-grid figure{margin:0;background:#fff;border:1px solid var(--line);min-height:400px;padding:18px;display:flex;flex-direction:column}.preview-grid img{height:310px;object-fit:contain}.preview-grid figcaption{margin-top:auto;border-top:1px solid var(--line);padding-top:10px;font-size:11px;color:#756e7d}
.steps{padding:92px 0;background:#17131f;color:#fff}.steps-wrap{display:grid;grid-template-columns:320px 1fr;gap:80px}.steps-copy h2{color:#fff}.steps-copy p{font-size:13px;line-height:1.85;color:#b7afc0}.update-track{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.update-track>div{min-height:240px;border:1px solid #393240;padding:18px;display:flex;flex-direction:column}.update-track b{font-size:30px;color:var(--acid)}.update-track span{font-size:14px;font-weight:900;margin-top:auto}.update-track small{font-size:9px;line-height:1.6;color:#8e8697;margin-top:8px}
.why-no-version{padding:92px 0;background:#fff}.no-version-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;align-items:center}.no-version-grid p{font-size:13px;line-height:1.85;color:var(--muted)}.no-version-grid figure{margin:0;background:#eeeaf5;min-height:470px;padding:28px;display:grid;place-items:center;position:relative}.no-version-grid figure img{max-height:390px;width:auto;object-fit:contain}.no-version-grid figcaption{position:absolute;left:15px;bottom:12px;color:#776e80;font-size:10px}
.after{padding:92px 0;background:#e9f1de}.after-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:70px;align-items:center}.after figure{margin:0;background:#fff;min-height:460px;padding:28px;display:grid;place-items:center;position:relative}.after figure img{max-height:380px;max-width:96%;object-fit:contain}.after figcaption{position:absolute;left:15px;bottom:12px;color:#706c68;font-size:10px}.after-grid ul{list-style:none;padding:0;margin:25px 0;border-top:1px solid #ced9c4}.after-grid li{padding:11px 0;border-bottom:1px solid #ced9c4;font-size:12px}
.faq-section{padding:92px 0;background:#fff}.faq-grid{display:grid;grid-template-columns:320px 1fr;gap:85px}.faq-list{border-top:1px solid var(--line)}details{border-bottom:1px solid var(--line)}summary{list-style:none;cursor:pointer;padding:22px 46px 22px 0;font-weight:900;position:relative}summary::after{content:"+";position:absolute;right:4px;top:16px;color:var(--violet);font-size:24px}details[open] summary::after{content:"−"}details p{margin:0 0 22px;font-size:13px;line-height:1.8;color:var(--muted)}
.version-footer{background:#100d16;color:#fff}.vf-rail{background:#211a2e;border-bottom:1px solid #352c43}.vf-platforms{min-height:82px;display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:#3b314a}.vf-platforms a{background:#211a2e;padding:18px;display:flex;justify-content:space-between;align-items:center}.vf-platforms b{font-size:11px}.vf-platforms span{font-size:9px;color:#9f96a8}.vf-main{min-height:180px;display:grid;grid-template-columns:230px 1fr auto;gap:55px;align-items:center;padding-bottom:84px}.vf-brand img{max-height:36px;width:auto}.vf-brand p{font-size:10px;color:#807887}.vf-note b{font-size:9px;color:var(--acid);letter-spacing:.14em}.vf-note p{font-size:11px;line-height:1.7;color:#9b93a2;max-width:620px}.vf-top{font-size:9px;color:#918a99}.mobile-bar{display:none}
@media(max-width:980px){.hero-grid,.steps-wrap,.no-version-grid,.after-grid,.faq-grid{grid-template-columns:1fr}.version-cards{grid-template-columns:1fr}.update-track{grid-template-columns:1fr 1fr}.vf-main{grid-template-columns:1fr}}
@media(max-width:760px){:root{--shell:min(100% - 28px,1180px)}body{padding-bottom:64px}.nav nav,.nav-cta{display:none}.nav{grid-template-columns:1fr;height:62px}.hero{padding:46px 0}.hero h1{font-size:50px}.lead{font-size:15px}.version-stage{min-height:390px}.version-stage img{max-height:290px}.versions,.preview,.steps,.why-no-version,.after,.faq-section{padding:66px 0}.preview-grid{display:flex;overflow:auto}.preview-grid figure{min-width:82%;min-height:380px}.preview-grid img{height:285px}.update-track{display:flex;overflow:auto}.update-track>div{min-width:72%}.no-version-grid figure,.after figure{min-height:390px}.vf-platforms{grid-template-columns:1fr}.vf-main{padding-top:28px;padding-bottom:84px}.mobile-bar{position:fixed;left:0;right:0;bottom:0;height:62px;background:#100d16;display:flex;align-items:center;justify-content:space-between;padding:0 14px;z-index:50;color:#fff}.mobile-bar span{display:flex;flex-direction:column}.mobile-bar b{font-size:12px}.mobile-bar small{font-size:9px;color:#8e8596}.mobile-bar a{background:var(--acid);color:#1b1621;padding:9px 16px;font-size:12px;font-weight:900}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}