:root{color:#17202a;font-synthesis:none;text-rendering:optimizelegibility;background:#f7f8fa;font-family:Inter,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}body{min-width:320px;margin:0}button,input{font:inherit}button{cursor:pointer}header{background:#fff;border-bottom:1px solid #e8ebef;justify-content:space-between;align-items:center;height:72px;padding:0 max(28px,50vw - 590px);display:flex}.brand{color:#111827;align-items:center;gap:12px;font-weight:700;text-decoration:none;display:flex}.meta-mark{color:#1686f7;letter-spacing:-5px;font:700 36px/1 Arial}.secure{color:#667085;font-size:13px}main{min-height:calc(100vh - 130px)}footer{text-align:center;color:#98a2b3;padding:22px;font-size:12px}.hero{text-align:center;background:radial-gradient(circle at 50% 0,#e9f5ff 0,#0000 52%),#fff;padding:76px 24px 42px}.hero h1,.wizard h1,.complete-page h1{letter-spacing:-1.8px;color:#101828;margin:10px 0 20px;font-size:clamp(32px,4.3vw,54px);line-height:1.08}.eyebrow{letter-spacing:1.7px;color:#1686f7;font-size:12px;font-weight:800}.lead{color:#667085;max-width:700px;margin:0 auto;font-size:18px;line-height:1.65}.notice{text-align:left;color:#475467;background:#f0f7ff;border:1px solid #d4e9ff;border-radius:12px;align-items:center;gap:14px;max-width:710px;margin:30px auto 0;padding:14px 18px;font-size:14px;display:flex}.notice span{color:#fff;background:#1686f7;border-radius:50%;flex:none;place-items:center;width:24px;height:24px;font-weight:700;display:grid}.notice p{margin:0}.disclaimer{color:#b54708;text-align:left;max-width:710px;margin:10px auto 0;font-size:12px;line-height:1.6}.device-section{max-width:1180px;margin:auto;padding:42px 24px 80px}.device-section h2{text-align:center;margin:0;font-size:28px}.device-section>p{text-align:center;color:#667085}.device-grid{grid-template-columns:repeat(4,1fr);gap:18px;margin-top:30px;display:grid}.device-card{background:#fff;border:1px solid #e4e7ec;border-radius:18px;flex-direction:column;justify-content:flex-end;align-items:center;gap:10px;height:255px;padding:28px 20px;transition:all .2s;display:flex;box-shadow:0 1px 2px #1018280a}.device-card:hover{border-color:var(--accent,#1686f7);transform:translateY(-4px);box-shadow:0 14px 30px #10182816}.device-card strong{color:#101828;font-size:17px}.device-card>span{color:#1686f7;font-size:13px}.headset{width:130px;height:105px;margin-bottom:15px;position:relative}.strap{border:8px solid #d7dce2;border-radius:50%;width:118px;height:73px;position:absolute;top:5px;left:6px}.visor{background:linear-gradient(145deg,#fff,#e9edf2);border:1px solid #d2d8df;border-radius:17px 17px 22px 22px;width:110px;height:50px;position:absolute;top:39px;left:10px;box-shadow:0 8px 16px #10182820}.visor:before,.visor:after{content:"";background:#e4e9ee;border-radius:0 0 8px 8px;width:17px;height:14px;position:absolute;bottom:-7px}.visor:before{left:17px}.visor:after{right:17px}.visor i{background:var(--accent);border-radius:50%;width:6px;height:6px;position:absolute;top:17px}.visor i:first-child{left:22px}.visor i:nth-child(2){left:52px}.visor i:nth-child(3){right:22px}.headset.large{margin:40px auto 50px;transform:scale(1.65)}.steps{background:#fff;border-bottom:1px solid #e8ebef;justify-content:center;align-items:center;height:82px;display:flex}.steps span{color:#98a2b3;align-items:center;gap:8px;font-size:13px;display:flex}.steps b{border:1px solid #d0d5dd;border-radius:50%;place-items:center;width:25px;height:25px;font-size:11px;display:grid}.steps .active{color:#101828;font-weight:700}.steps .active b,.steps .complete b{color:#fff;background:#1686f7;border-color:#1686f7}.steps i{background:#e4e7ec;width:60px;height:1px;margin:0 16px}.wizard{grid-template-columns:38% 62%;max-width:1040px;min-height:520px;margin:58px auto;padding:0 24px;display:grid}.art-panel{background:linear-gradient(145deg,#eef7ff,#f6f2ff);border-radius:22px 0 0 22px;flex-direction:column;justify-content:center;align-items:center;display:flex}.art-panel small{color:#475467;font-weight:700}.wizard-body{background:#fff;border:1px solid #e4e7ec;border-left:0;border-radius:0 22px 22px 0;padding:48px 54px}.wizard h1{letter-spacing:-1px;font-size:36px}.instructions{counter-reset:item;margin:30px 0;padding:0;list-style:none}.instructions li{counter-increment:item;padding:0 0 25px 48px;position:relative}.instructions li:before{content:counter(item);color:#1686f7;background:#eaf4ff;border-radius:50%;place-items:center;width:30px;height:30px;font-weight:800;display:grid;position:absolute;top:0;left:0}.instructions b,.instructions span{display:block}.instructions span{color:#667085;margin-top:5px;font-size:14px;line-height:1.5}.actions{justify-content:space-between;gap:12px;margin-top:28px;display:flex}.primary,.secondary{border:1px solid #0000;border-radius:10px;padding:13px 22px;font-weight:700}.primary{color:#fff;background:#1686f7}.primary:hover{background:#0875df}.primary:disabled{opacity:.5;cursor:not-allowed}.secondary{color:#344054;background:#fff;border-color:#d0d5dd}.wizard.narrow{max-width:720px;display:block}.narrow .wizard-body{border:1px solid #e4e7ec;border-radius:22px;padding:58px}.center{text-align:center}.center .lead{font-size:16px}.actions.centered{justify-content:center}.usb-icon{color:#1686f7;background:#eaf4ff;border-radius:50%;place-items:center;width:76px;height:76px;margin:0 auto 25px;font-size:44px;font-weight:200;display:grid}.error{color:#b42318;text-align:left;background:#fff1f1;border:1px solid #ffc9c9;border-radius:10px;margin:22px 0;padding:13px 16px;font-size:14px}details{color:#667085;margin-top:28px;font-size:13px}summary{cursor:pointer;color:#344054;font-weight:700}.spinner{vertical-align:-2px;border:2px solid #fff6;border-top-color:#fff;border-radius:50%;width:15px;height:15px;margin-right:8px;animation:.8s linear infinite spin;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.progress-ring{background:conic-gradient(#1686f7 var(--progress),#e9edf2 0);border-radius:50%;place-items:center;width:145px;height:145px;margin:0 auto 28px;display:grid;position:relative}.progress-ring:before{content:"";background:#fff;border-radius:50%;position:absolute;inset:11px}.progress-ring span{color:#101828;font-size:36px;font-weight:800;position:relative}.progress-ring small{font-size:16px}.file-picker{color:#1686f7;cursor:pointer;border:1px dashed #98a2b3;border-radius:10px;width:min(420px,100%);margin:24px auto;padding:16px;font-weight:700;display:block}.file-picker input{display:none}.warning{color:#b54708;background:#fffaeb;border-radius:8px;margin-top:25px;padding:12px;font-size:12px}.complete-page{text-align:center;max-width:700px;margin:90px auto;padding:40px}.success{color:#079455;background:#dcfae6;border-radius:50%;place-items:center;width:90px;height:90px;margin:auto;font-size:46px;display:grid}.complete-page h1{font-size:42px}.complete-page .primary{margin-top:30px}@media (width<=800px){.device-grid{grid-template-columns:repeat(2,1fr)}.wizard{display:block}.art-panel{border-radius:20px 20px 0 0;min-height:230px}.wizard-body{border-left:1px solid #e4e7ec;border-radius:0 0 20px 20px;padding:35px 26px}.steps span{font-size:0}.steps i{width:25px;margin:0 7px}.secure{display:none}}@media (width<=480px){.device-grid{grid-template-columns:1fr}.device-card{height:210px}.hero{padding-top:50px}.wizard{margin-top:25px}.narrow .wizard-body{padding:40px 22px}}