:root{color-scheme:dark;--bg:#070a13;--text:#eef1fb;--muted:#99a2b8;--line:rgba(255,255,255,.1);--surface:rgba(255,255,255,.035);--gradient:linear-gradient(115deg,#9698ff,#62d9ec 56%,#c18cf3)}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;background:var(--bg);color:var(--text);font:15px/1.75 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
body:before{content:"";position:fixed;inset:0;z-index:-2;background:radial-gradient(ellipse at 50% -20%,#34327588,transparent 60%),radial-gradient(ellipse at 100% 30%,#12505b30,transparent 50%),var(--bg)}
body:after{content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;background-image:linear-gradient(#ffffff04 1px,transparent 1px),linear-gradient(90deg,#ffffff04 1px,transparent 1px);background-size:48px 48px;mask-image:linear-gradient(#000,transparent)}
a{color:#b2b7ff;text-decoration:none}
button,a{ -webkit-tap-highlight-color:transparent}
button{font:inherit;cursor:pointer}
button:disabled{cursor:not-allowed;opacity:.5}
a:hover{color:white}
button:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid #67e8f9;outline-offset:5px}
img{max-width:100%;height:auto}
h1,h2,h3,p{margin-top:0}
h2{font-size:34px;letter-spacing:-1px;margin-bottom:12px}
h3{font-size:18px;margin-bottom:10px}
p{color:var(--muted)}
.hidden{display:none!important}
.container{max-width:1136px;padding:0 28px;margin:auto}
.site-top{position:sticky;top:0;z-index:50}
.nav{background:#080c17db;backdrop-filter:blur(20px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:1240px;margin:auto;display:flex;align-items:center;gap:24px;padding:15px 28px}
.brand{display:flex;align-items:center;gap:10px;font-weight:750;color:var(--text);white-space:nowrap}
.brand img{border-radius:8px}
.nav nav{display:flex;gap:22px;margin-left:auto}
.nav nav a{color:#a7afc2;font-size:13px;white-space:nowrap}
.btn{border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;gap:14px;border-radius:11px;padding:12px 22px;color:var(--text);background:var(--surface);font-weight:650;transition:transform .2s,background .2s}
.btn:hover{transform:translateY(-2px);background:#ffffff12}
.btn-primary,.nav-cta{background:var(--gradient);color:#0b1225;border:0;box-shadow:0 8px 32px #7473ee25}
.btn-primary:hover,.nav-cta:hover{background:var(--gradient);color:#0b1225}
.nav-cta{font-size:13px;padding:9px 16px}
.hero{text-align:center;padding:56px 0 40px}
.muted{color:var(--muted);font-size:14px}
.hero-actions{display:flex;gap:14px;justify-content:center;margin:0}
.hero-actions .btn{padding:14px 27px}
.hero-stats{display:flex;justify-content:center;gap:0}
.hero-stats div{padding:0 36px;border-right:1px solid var(--line)}
.hero-stats div:last-child{border:0}
.hero-stats b{display:block;font-size:22px;color:#b6bcf5}
.hero-stats span{font-size:12px;color:var(--muted)}
.section{padding:65px 0;border-top:1px solid var(--line)}
.section-heading{text-align:center;margin-bottom:36px}
.section-heading p{font-size:14px;margin-bottom:0}
.eyebrow{display:block;color:#979ff4;font-size:11px;letter-spacing:2.5px;font-weight:700;margin-bottom:10px}
.download-label{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:28px 0 20px}
.download-label h3{margin:0;display:flex;align-items:center;gap:12px}
.download-label a,.tag{font-size:12px}
.tag{padding:3px 12px;border:1px solid #8687fc40;color:#b6bbff;border-radius:20px;background:#818cf810}
.number{display:inline-flex;align-items:center;justify-content:center;color:#acb2ff;border:1px solid #8b92ff30;background:#818cf80c;border-radius:10px;font:600 14px/1 monospace;width:34px;height:34px}
.download-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.dl-card{padding:24px 18px;text-align:center;background:var(--surface);border:1px solid var(--line);border-radius:15px;transition:border-color .2s,transform .2s}
.dl-card:hover{border-color:#9098ff66;transform:translateY(-3px)}
.os-icon{display:flex;justify-content:center;align-items:center;font-size:29px;width:52px;height:52px;margin:0 auto 16px;background:#ffffff05;border:1px solid var(--line);border-radius:13px}
.dl-card h3{font-size:16px;margin:0 0 4px}
.dl-sub{font-size:12px;margin-bottom:10px}
.dl-ver{font:12px/1.8 monospace;color:#a8b2d1;min-height:22px}
.btn-dl{width:100%;font-size:12px;padding:9px 8px}
.tip{padding:14px 18px;background:#818cf808;border:1px solid #818cf819;border-radius:10px;color:#a2acc6;font-size:12px;line-height:1.9;margin:18px 0 30px}
.compact .os-icon{font-size:23px;height:40px;width:40px}
.compact .dl-card{padding:18px}
.install-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.surface{background:var(--surface);border:1px solid var(--line);border-radius:15px;padding:26px}
.small-icon{display:flex;align-items:center;justify-content:center;width:38px;height:38px;background:#818cf813;color:#b0b7ff;border:1px solid #818cf822;border-radius:10px;font-size:22px;margin-bottom:18px}
.surface p,.surface li{font-size:13px;color:var(--muted)}
.surface p{margin:0}
.surface ol{padding-left:20px;margin-bottom:0}
.surface li+li{margin-top:10px}
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.feature-grid .surface{padding:23px}
.feature-grid h3{font-size:16px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin-bottom:48px}
.steps .number{margin-bottom:18px}
.steps h3{font-size:17px}
.steps p{font-size:13px}
.walkthrough{display:grid;grid-template-columns:1fr 1fr;gap:68px;align-items:center;background:linear-gradient(135deg,#818cf808,#22d3ee04);padding:40px;border:1px solid var(--line);border-radius:20px}
.walkthrough h3{font-size:31px;line-height:1.5;letter-spacing:-1px}
.walkthrough p{font-size:13px}
.walkthrough figure{margin:0}
.walkthrough img,.activation-detail img{display:block;width:100%;border-radius:16px;border:1px solid #ffffff15;box-shadow:0 20px 60px #0006}
figcaption{font-size:11px;text-align:center;color:#8f99b0;margin-top:13px}
.check-list{padding:0;list-style:none;font-size:13px;color:#cbd0e4;line-height:2.7}
.text-button{background:none;border:0;color:#b5bcff;padding:0;font-size:13px}
.activation-detail{margin-top:20px;border:1px solid var(--line);border-radius:12px}
.activation-detail figure{max-width:390px;margin:20px auto;padding:0 16px 16px}
.faq-section{max-width:850px;margin:auto}
.faq-list details{border-bottom:1px solid var(--line)}
summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:21px 20px;font-weight:550;font-size:14px}
summary::-webkit-details-marker{display:none}
summary span{color:#a7aff8;font-size:18px}
details[open] summary span{transform:rotate(45deg)}
details p{padding:0 20px 20px;margin:0;font-size:13px}
.support{display:flex;align-items:center;gap:12px;margin-top:30px;padding:25px 0}
.support p{margin:0 auto 0 0;color:var(--text);font-size:14px}
.support p span{display:block;color:var(--muted);font-size:12px}
.support .btn{font-size:12px;padding:10px 14px}
.updates{padding-top:35px;padding-bottom:40px}
.updates-top{padding-top:28px;padding-bottom:8px;border-top:0}
.updates h2{font-size:22px;margin:0}
.notice-list{display:flex;flex-direction:column;gap:10px}
.notice-item{background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.notice-item-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;cursor:pointer}
.notice-item-title{display:flex;align-items:center;gap:8px;font-weight:650;font-size:14px;color:var(--text)}
.notice-dot{width:8px;height:8px;border-radius:50%;background:#818cf8;flex-shrink:0}
.notice-item-time{font-size:12px;color:var(--muted);white-space:nowrap}
.notice-item-body{display:none;color:var(--muted);font-size:13px;white-space:pre-wrap;padding:0 16px 14px;line-height:1.8}
.notice-item.open .notice-item-body{display:block}
.notice-item-head:hover{background:#ffffff06}
.footer{display:flex;align-items:center;gap:24px;border-top:1px solid var(--line);padding-top:28px;padding-bottom:30px;font-size:12px}
.footer .brand{font-size:14px}
.footer p{margin:0 auto 0 0}
.modal{position:fixed;inset:0;z-index:100;display:flex;align-items:center;justify-content:center;padding:20px}
.modal-backdrop{position:absolute;inset:0;background:#030611bd;backdrop-filter:blur(7px)}
.modal-box{position:relative;width:100%;max-width:520px;max-height:85vh;overflow:auto;background:#121829;border:1px solid #ffffff20;border-radius:18px;padding:30px;box-shadow:0 30px 100px #0008}
.modal-box h3{padding-right:22px}
.modal-close{position:absolute;right:15px;top:12px;border:0;background:none;color:#abb5cd;font-size:28px}
.tutorial-os,.tutorial-links{display:flex;gap:12px;margin:20px 0}
.tutorial-os-btn,.tutorial-link{border:1px solid var(--line);border-radius:8px;padding:10px 18px;background:var(--surface);color:var(--text)}
.tutorial-os-btn.active{background:#818cf830}
.dl-modal-hint,.modal-hint{font-size:13px}
.dl-modal-url{display:block;word-break:break-all;padding:12px;background:#ffffff06;border-radius:8px;font-size:13px}
.dl-modal-label,.dl-modal-label-inline{font-size:12px;color:var(--muted)}
.dl-modal-pwd-row{display:flex;align-items:center;gap:12px;margin:15px 0}
.dl-modal-copy-text{background:none;border:0;color:#b6baff}
.dl-modal-open-btn{margin-top:20px;width:100%}
.qrcode-wrap{text-align:center}
.qrcode-wrap img{max-height:350px}
.notice-dialog-body{white-space:pre-wrap}
.notice-dialog-open{overflow:hidden}
.toast{position:fixed;z-index:200;bottom:35px;left:50%;transform:translateX(-50%);background:#26304a;border:1px solid #ffffff20;border-radius:12px;padding:12px 22px;max-width:90vw;text-align:center}
.skip-link{position:fixed;top:-80px;left:12px;z-index:300;background:#19203b;padding:10px}
.skip-link:focus{top:12px}
@media(max-width:1050px){.nav-inner{gap:15px}
.nav nav{gap:15px;overflow:auto}
.nav-cta{display:none}
.feature-grid{grid-template-columns:repeat(2,1fr)}
.walkthrough{gap:32px;padding:30px}
}
@media(max-width:700px){html{scroll-padding-top:125px}
.container{padding-left:20px;padding-right:20px}
.nav-inner{flex-wrap:wrap;padding:12px 20px;gap:10px}
.nav nav{width:100%;margin:0;gap:23px;padding:4px 0}
.nav .brand{font-size:14px}
.hero{padding:46px 0}
.hero-logo{width:62px;height:62px}
.hero h1{font-size:39px;letter-spacing:-1px}
.hero-lead{font-size:17px}
.hero .muted{font-size:12px}
.hero-actions .btn{padding:12px 17px;font-size:13px}
.hero-stats div{padding:0 15px}
.hero-stats b{font-size:17px}
.hero-stats span{font-size:10px}
.section{padding:44px 0}
h2{font-size:27px}
.download-grid{grid-template-columns:repeat(2,1fr);gap:12px}
.dl-card{padding:20px 12px}
.download-label h3{font-size:16px}
.install-grid,.steps{grid-template-columns:1fr;gap:14px}
.steps article{position:relative;padding-left:53px}
.steps .number{position:absolute;left:0}
.steps p{margin-bottom:6px}
.surface{padding:22px}
.feature-grid{gap:12px}
.feature-grid .surface{padding:18px}
.walkthrough{grid-template-columns:1fr;padding:24px;gap:25px}
.walkthrough h3{font-size:27px}
.walkthrough figure{max-width:390px;margin:auto}
.support{flex-wrap:wrap}
.support p{width:100%;margin-bottom:7px}
.footer{flex-wrap:wrap;gap:16px}
.footer p{width:100%;order:2}
.footer .brand{width:100%}
.modal-box{padding:25px 20px}
summary{padding:18px 8px}
.activation-detail summary{padding:18px}
.compact .dl-card{padding:16px 10px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}
*{transition:none!important}
}