:root{color-scheme:light;--bg:#f4f5f6;--ink:#151719;--muted:#687079;--line:#dfe2e5;--white:#fff;--danger:#b42318;--success:#117a45}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;letter-spacing:0}.topbar{height:58px;background:#111;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,calc((100vw - 1380px)/2));position:sticky;top:0;z-index:5}.brand{color:#fff;text-decoration:none;font-weight:700}.top-actions,.inline-form,.device-card-head,.section-title,.page-heading,.event,.row-action{display:flex;align-items:center;gap:12px}.top-actions form{margin:0}.content{max-width:1380px;margin:0 auto;padding:28px 24px 60px}.page-heading{justify-content:space-between;align-items:flex-end;margin-bottom:22px}.page-heading h1,.section h2{margin:0}.page-heading p,.login-panel p,.pairing-panel p{color:var(--muted);margin:7px 0 0}.button,.link-button{border:1px solid var(--line);background:#fff;color:#17191b;padding:9px 13px;border-radius:5px;font:inherit;cursor:pointer;text-decoration:none}.primary{background:#111;color:#fff;border-color:#111}.subtle{background:#f7f7f7}.danger-button{color:var(--danger);border-color:#d9a19c}.link-button{border:0;background:transparent;padding:4px;color:inherit}.section,.login-panel,.pairing-panel{background:var(--white);border:1px solid var(--line);border-radius:7px;padding:20px;margin-bottom:18px}.section-title{justify-content:space-between;margin-bottom:15px}.count{background:#edf0f2;border-radius:20px;padding:3px 9px;font-size:13px}.danger,.danger-text{color:var(--danger)}.device-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:12px}.device-card{color:inherit;text-decoration:none;border:1px solid var(--line);border-radius:6px;padding:17px;background:#fff}.device-card:hover{border-color:#999}.device-card-head{justify-content:space-between;margin-bottom:15px}.status-dot{width:9px;height:9px;border-radius:50%;background:#aaa}.status-dot.online{background:#19a15f}.metric-row{display:flex;justify-content:space-between;margin:8px 0;color:var(--muted)}.metric-row b{color:var(--ink)}small{color:var(--muted)}.event-list{display:grid;gap:8px}.event{justify-content:space-between;border-top:1px solid var(--line);padding-top:12px}.event:first-child{border-top:0;padding-top:0}.event p{margin:4px 0}.login-shell{min-height:calc(100vh - 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