:root{--ink:#171d24;--muted:#69717a;--paper:#f5f6f7;--blue:#1677ff;--dark:#101922;--line:#dce0e4;--mint:#c6eedf;--container:1160px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:96px}body{margin:0;color:var(--ink);background:var(--paper);font-family:'Avenir Next','PingFang SC','Microsoft YaHei',sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}a,button,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:5px}.container{width:min(calc(100% - 96px),var(--container));margin:auto}.skip{position:fixed;top:-100px;padding:16px;background:white;z-index:100}.skip:focus{top:12px}.header{background:#101922f2;color:#f8fafb;border-bottom:1px solid 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p{font-size:15px;line-height:1.8;color:#a3b2bd}.download-options{align-self:center}.download-option{display:flex;align-items:center;gap:20px;padding:22px;background:#ffffff06;border:1px solid #ffffff25;border-radius:10px;margin-bottom:12px;transition:background .2s}.download-option:hover{background:#ffffff12}.device-icon{font-size:35px;color:#c6eedf;width:30px;text-align:center}.download-option small{font-size:12px;color:#9caeba;display:block;margin-bottom:6px}.download-option strong{font-size:18px;font-weight:500}.download-option>span:last-child{margin-left:auto;font-size:24px}.download-note{font-size:12px;color:#8195a3;line-height:1.8;margin:16px 0 0}.faq-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:80px}.faq-list details{border-bottom:1px solid var(--line);padding:23px 0}.faq-list details:first-child{padding-top:0}.faq-list summary{list-style:none;display:flex;justify-content:space-between;align-items:center;gap:20px;font-size:17px;font-weight:550;cursor:pointer}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:'+';font-size:23px;color:#8d98a2;font-weight:400}.faq-list details[open] summary:after{content:'−'}.faq-list p{font-size:15px;color:var(--muted);line-height:1.9;margin:16px 35px 0 0}footer{background:#e9edef;padding:44px 0 max(28px,env(safe-area-inset-bottom))}.footer-top{display:flex;align-items:center;gap:35px;padding-bottom:34px;border-bottom:1px solid #d6dde1}.footer-top>span{font-size:14px;color:#7f8c96}.back-top{margin-left:auto;font-size:12px;color:#667681}.footer-bottom{display:flex;justify-content:space-between;align-items:center;padding-top:24px;font-size:12px;color:#77858f}.footer-bottom>div{display:flex;gap:24px}@keyframes enter{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}
@media(min-width:1450px){.hero-grid{min-height:780px}}
@media(max-width:1000px){.container{width:calc(100% - 64px)}.hero-grid{gap:12px;min-height:660px}h1{font-size:53px}.phone{transform:rotate(7deg) scale(.9)}.floating-card{left:-15px;padding:15px;bottom:130px}.product-stage{height:590px}.intro-strip .container>div{gap:20px;font-size:16px}.security-grid{gap:55px}.download-panel{padding:45px;gap:35px}.faq-grid{gap:45px}}
@media(max-width:760px){.container{width:calc(100% - 40px)}.header-inner{height:70px;gap:10px}.brand{font-size:22px}.brand-icon{width:34px;height:34px;font-size:23px}nav{display:none}.header-actions{gap:18px}.header-download{min-height:36px;padding:0 12px;font-size:12px}.hero-grid{grid-template-columns:1fr;gap:0;min-height:0}.hero-copy{padding:48px 0 0}.eyebrow{font-size:11px;letter-spacing:.3px;margin-bottom:24px}h1{font-size:48px;line-height:1.23;letter-spacing:-2px;margin-bottom:20px}.hero-description{font-size:15px;line-height:1.9;max-width:340px;margin-bottom:25px}.hero-buttons{gap:25px}.primary{min-height:49px;font-size:14px;padding:0 22px}.platform-note{margin-top:18px;font-size:11px}.product-stage{height:515px;width:min(100%,430px);margin:auto}.phone{transform:rotate(7deg) scale(.78)}.orbit{width:480px;height:290px}.orbit-two{width:600px;height:365px}.stage-word{top:70px;left:4px;font-size:54px}.floating-card{left:0;bottom:114px;gap:10px;padding:13px 15px}.floating-card strong{font-size:11px}.floating-icon{width:33px;height:33px;font-size:20px}.stage-caption{bottom:13px;font-size:10px;right:0}.hero-bottom{height:49px;font-size:8px;letter-spacing:1.2px}.intro-strip>.container{flex-direction:column;justify-content:center;align-items:flex-start;gap:18px;padding:24px 0}.intro-strip>.container>span{font-size:12px}.intro-strip .container>div{width:100%;justify-content:space-between;gap:8px;font-size:14px}.section{padding:65px 0}.section-heading{display:block;margin-bottom:30px}.kicker{font-size:10px;letter-spacing:1.5px}h2{font-size:35px;letter-spacing:-1.5px;margin:17px 0 23px}.section-heading h2{margin-bottom:20px}.section-heading>p{font-size:15px;max-width:100%}.feature-grid{grid-template-columns:1fr;gap:14px}.feature{padding:27px 26px 0;min-height:330px}.feature h3{font-size:22px}.feature p{font-size:14px}.asset-art,.connection-art,.c2c-art{height:155px}.security-grid{grid-template-columns:1fr;gap:35px}.security-grid>div>p{font-size:15px}.safety-list article{gap:20px;padding:23px 0}.safety-list h3{font-size:19px}.safety-list p{font-size:14px}.download{padding-bottom:0}.download-panel{grid-template-columns:1fr;width:calc(100% - 24px);padding:33px 26px;gap:23px;border-radius:16px}.download-copy h2{font-size:37px;margin-bottom:19px}.download-copy p{font-size:14px;margin-bottom:0}.download-option{padding:18px 15px;gap:16px}.download-option strong{font-size:17px}.faq-grid{grid-template-columns:1fr;gap:34px}.faq-list summary{font-size:16px}.faq-list p{font-size:14px;margin-right:18px}.footer-top{flex-wrap:wrap;gap:17px;padding-bottom:25px}.footer-top>span{font-size:12px}.back-top{width:100%;margin:0}.footer-bottom{align-items:flex-start;flex-direction:column;gap:20px}.footer-bottom>div{gap:23px}}
@media(max-width:360px){h1{font-size:42px}.header-actions{gap:13px}.product-stage{height:485px}.phone{transform:rotate(7deg) scale(.73)}.floating-card{bottom:110px}.floating-card strong{font-size:10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}