:root{--cream:#f5f2ea;--paper:#fffdf8;--navy:#14253d;--muted:#697487;--blue:#4568e8;--cyan:#4bc7c4;--coral:#ff796d;--yellow:#f3cb57;--line:#d9d8d3;--shadow:0 25px 70px rgba(36,47,72,.14)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--cream);color:var(--navy);font-family:"Microsoft YaHei UI","PingFang SC","Segoe UI",sans-serif;line-height:1.7;-webkit-font-smoothing:antialiased}body::before{content:"";position:fixed;inset:0;z-index:-2;background:radial-gradient(circle at 8% 12%,rgba(75,199,196,.15),transparent 23%),radial-gradient(circle at 92% 30%,rgba(255,121,109,.12),transparent 24%)}a{color:inherit;text-decoration:none}img{max-width:100%}h1,h2,h3,p{margin-top:0}:focus-visible{outline:3px solid var(--blue);outline-offset:4px}.container{width:min(1220px,calc(100% - 42px));margin:auto}.skip{position:fixed;top:-60px;left:18px;z-index:99;background:#fff;padding:10px 16px}.skip:focus{top:15px}.card{background:var(--paper);border:1px solid var(--line);box-shadow:var(--shadow)}.site-header{position:sticky;top:0;z-index:50;background:rgba(245,242,234,.88);backdrop-filter:blur(15px);border-bottom:1px solid var(--line)}.nav{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand-logo{width:148px;height:42px;padding:8px 10px;display:block;object-fit:contain;border-radius:8px;background:linear-gradient(120deg,#4669e8,#43b9c2)}.nav-links{display:flex;gap:30px;color:#677287;font-size:13px;font-weight:800}.nav-links a:hover,.nav-links a[aria-current=page]{color:var(--blue)}.nav-toggle{display:none;border:0;background:none;font-size:25px}.btn{min-width:154px;min-height:49px;padding:12px 22px;display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:999px;background:var(--blue);color:#fff;font-size:13px;font-weight:900;white-space:nowrap;word-break:keep-all;writing-mode:horizontal-tb;box-shadow:0 13px 27px rgba(69,104,232,.22);transition:.2s}.btn:hover{transform:translateY(-2px)}.btn-dark{background:var(--navy)}.btn-white{background:#fff;color:var(--navy);box-shadow:none}.hero{padding:85px 0 105px}.hero-grid{min-height:670px;display:grid;grid-template-columns:.88fr 1.12fr;gap:55px;align-items:center}.eyebrow{display:inline-flex;align-items:center;gap:10px;margin-bottom:18px;color:var(--blue);font-size:11px;font-weight:950;letter-spacing:.13em}.eyebrow::before{content:"";width:32px;height:2px;background:var(--coral)}h1{margin-bottom:25px;font-size:clamp(53px,6.6vw,90px);font-weight:950;line-height:.94;letter-spacing:-.065em}.hero-copy p{max-width:600px;color:var(--muted);font-size:18px}.actions{display:flex;flex-wrap:wrap;gap:10px}.platforms{display:flex;flex-wrap:wrap;gap:8px;margin-top:25px}.platforms span{padding:6px 10px;border:1px solid var(--line);border-radius:99px;background:#fff;color:#6b7485;font-size:10px;font-weight:850}.sync-stage{min-height:610px;padding:30px;position:relative;border-radius:50%;display:grid;place-items:center;background:rgba(255,255,255,.47);border:1px solid rgba(69,104,232,.18)}.sync-stage::before,.sync-stage::after{content:"";position:absolute;border:1px dashed rgba(69,104,232,.28);border-radius:50%}.sync-stage::before{inset:10%}.sync-stage::after{inset:25%}.hero-media{position:relative;z-index:2;align-self:center;height:auto;padding:0;margin:0}.hero-media img{filter:drop-shadow(0 30px 34px rgba(41,53,83,.18))}.sync-note{position:absolute;z-index:3;padding:11px 14px;border-radius:99px;background:#fff;box-shadow:0 13px 28px rgba(34,44,70,.12);font-size:10px;font-weight:900}.note-a{left:2%;top:24%}.note-b{right:0;bottom:25%}.proof{margin-top:20px;padding:14px;display:grid;grid-template-columns:repeat(5,1fr);gap:9px;border-radius:18px}.proof div{padding:19px;border-radius:12px;background:#f4f2ed}.proof strong{display:block;font-size:27px}.proof span{color:var(--muted);font-size:10px}
.section{padding:116px 0}.head{max-width:770px;margin-bottom:50px}.head.center{margin-inline:auto;text-align:center}.head.center .eyebrow{justify-content:center}h2{margin-bottom:17px;font-size:clamp(39px,4.8vw,64px);font-weight:950;line-height:1.03;letter-spacing:-.052em}.lead{color:var(--muted);font-size:17px}
.handoff{display:grid;grid-template-columns:1fr 110px 1fr;gap:22px;align-items:center}.device-card{min-height:430px;padding:38px;display:flex;flex-direction:column;justify-content:space-between;border-radius:24px}.device-card:first-child{background:var(--navy);color:#fff}.device-card p{color:var(--muted)}.device-card:first-child p{color:#aeb8c7}.device-screen{padding:20px;border-radius:17px;background:#f0eee9}.device-card:first-child .device-screen{background:#25374e}.status-line{display:flex;align-items:center;justify-content:space-between;font-size:11px}.online{color:var(--cyan);font-weight:900}.handoff-arrow{width:110px;height:110px;display:grid;place-items:center;border-radius:50%;background:var(--coral);color:#fff;font-size:37px;box-shadow:var(--shadow)}
.feature-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:16px}.feature{grid-column:span 3;min-height:300px;padding:30px;border-radius:20px}.feature:nth-child(1){grid-column:span 6;background:var(--blue);color:#fff}.feature:nth-child(4){background:var(--yellow)}.feature-icon{width:50px;height:50px;margin-bottom:45px;display:grid;place-items:center;border-radius:50%;background:#e7eafe;color:var(--blue);font-weight:950}.feature:nth-child(1) .feature-icon{background:rgba(255,255,255,.18);color:#fff}.feature:nth-child(4) .feature-icon{background:#fff0b4}.feature h3{font-size:25px}.feature p{margin:0;color:var(--muted);font-size:13px}.feature:nth-child(1) p{color:#dce2fc}.news-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:16px}.news-list{display:grid;gap:16px}.news-card{padding:31px;border-radius:19px}.news-card h3{font-size:24px}.news-card p{color:var(--muted);font-size:13px}.news-feature{min-height:540px;padding:44px;display:flex;flex-direction:column;justify-content:space-between;border-radius:22px;background:var(--coral);color:#fff}.news-feature h3{font-size:40px}.news-feature p{color:#fff0ed}.link{color:var(--blue);font-size:12px;font-weight:900}.news-feature .link{color:#fff}
.ecosystem{display:grid;grid-template-columns:1.05fr .95fr;gap:75px;align-items:center}.device-media{align-self:center;height:auto;padding:0;margin:0}.device-media img{filter:drop-shadow(20px 32px 32px rgba(43,54,81,.18))}.device-list{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:28px}.device-list span{padding:14px 16px;border:1px solid var(--line);border-radius:11px;background:#fff;font-size:12px;font-weight:850}.reviews,.pricing{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.review,.price{padding:35px;border-radius:20px}.stars{color:var(--coral);letter-spacing:3px}.review blockquote{margin:22px 0;color:#5e697b}.person{padding-top:18px;border-top:1px solid var(--line)}.person span{display:block;color:var(--muted);font-size:11px}.price.featured{background:var(--navy);color:#fff;transform:translateY(-14px)}.plan{font-size:11px;font-weight:950;letter-spacing:.1em}.amount{margin:19px 0 8px;font-size:52px;font-weight:950}.amount small{font-size:13px}.price p{min-height:44px;color:var(--muted);font-size:13px}.price.featured p{color:#b3bdca}.price ul{padding:18px 0 0;margin:22px 0;list-style:none;border-top:1px solid var(--line)}.price li{margin:9px 0;font-size:13px}.price li::before{content:"✓";margin-right:8px;color:var(--cyan)}.price .btn{width:100%}.disclaimer{text-align:center;margin-top:22px;color:var(--muted);font-size:11px}
.faq{max-width:940px;margin:auto}.faq details{margin-bottom:10px;border-radius:14px;background:#fff;border:1px solid var(--line)}.faq summary{padding:22px 65px 22px 24px;position:relative;cursor:pointer;list-style:none;font-weight:900}.faq summary::-webkit-details-marker{display:none}.faq summary::after{content:"+";position:absolute;right:20px;color:var(--blue);font-size:24px}.faq details[open] summary::after{content:"−"}.faq details p{padding:0 65px 24px 24px;margin:0;color:var(--muted)}
.cta{padding:35px 0 110px}.cta-box{padding:68px;display:grid;grid-template-columns:1fr auto;gap:45px;align-items:center;border-radius:25px;background:var(--blue);color:#fff}.cta-box p{max-width:700px;color:#dae1ff}.cta-box .eyebrow{color:#fff}.site-footer{padding:68px 0 25px;border-top:1px solid var(--line)}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(4,1fr);gap:42px}.footer-intro p{max-width:280px;margin-top:17px;color:var(--muted);font-size:13px}.footer-col h3{font-size:13px}.footer-col a{display:block;margin:9px 0;color:var(--muted);font-size:13px}.footer-bottom{margin-top:44px;padding-top:19px;display:flex;justify-content:space-between;border-top:1px solid var(--line);color:#8a909b;font-size:11px}
.page-hero{padding:112px 0 80px}.page-box{padding:65px;border-radius:24px}.page-box h1{font-size:clamp(50px,6vw,82px)}.page-box p{max-width:700px;color:var(--muted);font-size:17px}.download-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:15px}.download-card{padding:28px;display:grid;grid-template-columns:65px 1fr auto;gap:19px;align-items:center;border-radius:18px}.os{width:65px;height:65px;display:grid;place-items:center;border-radius:18px;background:var(--navy);color:#fff;font-weight:950}.download-card h2{margin:0;font-size:22px}.download-card p{margin:0;color:var(--muted);font-size:11px}.download-card .btn{min-width:160px}.help-layout{display:grid;grid-template-columns:275px 1fr;gap:65px;align-items:start}.help-menu{position:sticky;top:100px;padding:22px;border-radius:18px;background:var(--navy);color:#fff}.help-menu strong{display:block;padding:8px}.help-menu a{display:block;padding:9px 8px;border-bottom:1px solid rgba(255,255,255,.1);color:#aeb8c7;font-size:12px}.help-menu a:hover{color:var(--yellow)}.help-content article{padding:0 0 54px;margin-bottom:54px;border-bottom:1px solid var(--line);scroll-margin-top:105px}.help-content h2{font-size:39px}.help-content p,.help-content li{color:var(--muted)}.notice{padding:19px 21px;border-left:4px solid var(--blue);background:#e8eaf4}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}@media(max-width:980px){.nav-links{display:none;position:absolute;top:78px;left:20px;right:20px;padding:20px;flex-direction:column;background:#fff;box-shadow:var(--shadow)}.nav-links.open{display:flex}.nav-toggle{display:block}.nav>.btn{display:none}.hero-grid,.news-grid,.ecosystem{grid-template-columns:1fr}.sync-stage{max-width:650px;margin:auto}.handoff{grid-template-columns:1fr}.handoff-arrow{margin:auto;transform:rotate(90deg)}.feature:nth-child(n){grid-column:span 6}.footer-grid{grid-template-columns:1.5fr 1fr 1fr}.download-grid{grid-template-columns:1fr}}@media(max-width:700px){.container{width:min(100% - 26px,1220px)}.section{padding:82px 0}.hero{padding-top:55px}h1{font-size:49px}.sync-stage{min-height:420px}.proof,.reviews,.pricing{grid-template-columns:1fr}.feature-grid{grid-template-columns:1fr}.feature:nth-child(n){grid-column:auto}.device-list{grid-template-columns:1fr}.price.featured{transform:none}.cta-box{padding:45px 27px;grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.footer-intro{grid-column:span 2}.footer-bottom{flex-direction:column;gap:7px}.download-card{grid-template-columns:65px 1fr}.download-card .btn{grid-column:span 2;width:100%}.help-layout{grid-template-columns:1fr}.help-menu{position:static}}
/* Natural image constraints */
.hero-grid{align-items:center}.hero-media{align-self:center;height:auto;padding:0;margin-top:0;margin-bottom:0;overflow:visible;transform:none;clip-path:none}.hero-media img{display:block;width:100%;height:auto;min-height:0;max-height:none;margin:0;padding:0;object-fit:contain;object-position:center;transform:none;clip-path:none}.ecosystem{align-items:center}.device-media{align-self:center;height:auto;padding:0;margin-top:0;margin-bottom:0;overflow:visible;transform:none;clip-path:none}.device-media img{display:block;width:100%;height:auto;min-height:0;max-height:none;margin:0;padding:0;object-fit:contain;object-position:center;transform:none;clip-path:none}