:root{font-family:Inter,"Microsoft YaHei",system-ui,sans-serif;color:#172033;background:#f4f7fb;--accent:#2563eb;--success:#159b62;--danger:#dc3545;--line:#dbe3ef;--muted:#667085}*{box-sizing:border-box}body{margin:0;background:linear-gradient(180deg,#eef5ff 0,#f7f9fc 260px);min-height:100vh}.topbar{display:flex;justify-content:space-between;align-items:center;padding:26px clamp(18px,4vw,54px);background:#111827;color:#fff}.topbar h1,.panel h2{margin:2px 0}.eyebrow{font-size:11px;letter-spacing:.16em;color:#7c8aa5;margin:0;text-transform:uppercase}.topbar .eyebrow{color:#94a3b8}.status-row,.actions,.panel-head,.dialog-head{display:flex;align-items:center;gap:12px}.panel-head,.dialog-head{justify-content:space-between}.nav{position:sticky;top:0;z-index:5;display:flex;gap:8px;padding:10px clamp(18px,4vw,54px);background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}.nav a{color:#4b5563;text-decoration:none;padding:8px 12px;border-radius:8px}.nav a:hover{background:#eef2f7}main{display:grid;gap:18px;padding:24px clamp(18px,4vw,54px) 50px}.panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px;box-shadow:0 8px 30px rgba(15,23,42,.05)}.button{border:0;border-radius:9px;padding:10px 15px;color:#fff;font-weight:700;cursor:pointer}.button.accent{background:var(--accent)}.button.success{background:var(--success)}.button.danger{background:var(--danger)}.badge{padding:6px 10px;border-radius:999px;font-size:12px}.badge.neutral{background:#334155}.badge.online{background:#dcfce7;color:#166534}.badge.offline{background:#e5e7eb;color:#4b5563}.muted,.empty{color:var(--muted)}textarea,input,select{width:100%;border:1px solid #cfd8e6;border-radius:9px;padding:10px;background:#fff;font:inherit}textarea{resize:vertical;margin:12px 0}.device-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:12px;margin-top:18px}.device-card{border:1px solid var(--line);border-radius:12px;padding:15px}.device-card h3{margin:0 0 8px}.settings-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;align-items:end}.settings-grid label,.login-card label{display:grid;gap:6px;font-size:13px;color:#475467}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse;margin-top:14px}th,td{text-align:left;border-bottom:1px solid var(--line);padding:11px;font-size:13px}.logs{display:grid;gap:8px}.log-item{padding:10px;border-left:3px solid var(--accent);background:#f8fafc}.notice{padding:12px;background:#eff6ff;border:1px solid #bfdbfe;border-radius:9px;margin-top:12px;word-break:break-all}.hidden{display:none}.login-page{display:grid;place-items:center}.login-card{width:min(420px,calc(100% - 32px));background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px;box-shadow:0 25px 60px rgba(15,23,42,.12)}.login-card form{display:grid;gap:15px}.error{color:var(--danger);min-height:20px}dialog{width:min(760px,calc(100% - 30px));border:0;border-radius:14px;padding:18px}dialog::backdrop{background:rgba(15,23,42,.72)}dialog video,dialog img{width:100%;max-height:70vh;object-fit:contain;background:#080b10;margin-top:12px}#stream-frame{display:none}@media(max-width:640px){.topbar{align-items:flex-start;gap:16px;flex-direction:column}.nav{overflow:auto}.panel{padding:16px}}