:root{
  --bg:#0f172a; --panel:#16233b; --panel2:#1d2c48; --line:#2a3b5c;
  --txt:#e6ecf7; --muted:#8fa3c4; --ok:#22c55e; --bad:#ef4444; --acc:#3b82f6;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--txt);
  font:14px/1.6 "Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif}
h1,h2,h3{margin:0;font-weight:600}
h3{font-size:14px;margin:18px 0 8px;color:var(--muted)}
code{background:#0b1222;border:1px solid var(--line);border-radius:4px;padding:1px 6px;
  font-family:Consolas,monospace;font-size:12.5px;color:#7dd3fc}
a{color:inherit;text-decoration:none}
.muted{color:var(--muted);font-size:13px}
.hint{color:var(--muted);font-size:12.5px;margin-top:26px;text-align:center}

/* ---------- 顶栏 ---------- */
.topbar{display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:12px 22px;background:#111c30;border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:9}
.topbar h1{font-size:17px}
.topbar small{color:var(--muted);font-weight:400}
.stats{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.pill{display:inline-flex;align-items:center;gap:6px;background:var(--panel);
  border:1px solid var(--line);border-radius:999px;padding:3px 12px;font-size:12.5px;color:var(--muted)}
.pill b{color:var(--txt)}
.dot{width:8px;height:8px;border-radius:50%;background:#64748b;display:inline-block;flex:0 0 auto}
.dot.on{background:var(--ok);box-shadow:0 0 8px var(--ok)}
.dot.off{background:var(--bad)}
button{background:var(--acc);color:#fff;border:0;border-radius:6px;padding:7px 16px;
  font-size:13px;cursor:pointer}
button:hover{filter:brightness(1.1)}
button.ghost{background:transparent;border:1px solid var(--line);color:var(--muted)}
button.ghost:hover{color:var(--txt);border-color:var(--acc)}

/* ---------- 门户 ---------- */
.wrap{max-width:1080px;margin:0 auto;padding:36px 22px}
.lead{color:var(--muted);margin:0 0 22px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px 20px;
  transition:.15s;display:block}
.card:hover{border-color:var(--acc);transform:translateY(-2px)}
.card h3{color:var(--txt);font-size:16px;margin:0 0 10px}
.card p{margin:8px 0 0;color:var(--muted);font-size:12.5px}

/* ---------- 登录 ---------- */
.login-wrap{min-height:100vh;display:grid;place-items:center;padding:24px}
.login{width:340px;background:var(--panel);border:1px solid var(--line);border-radius:14px;
  padding:28px;display:flex;flex-direction:column;gap:14px}
.login h2{font-size:18px;text-align:center;margin-bottom:2px}
.login label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted)}
input,select,textarea{background:#0b1222;border:1px solid var(--line);color:var(--txt);
  border-radius:6px;padding:9px 11px;font:inherit;outline:none}
input:focus,select:focus,textarea:focus{border-color:var(--acc)}
textarea{font-family:Consolas,monospace;font-size:13px;width:100%;resize:vertical}
.err{color:var(--bad);font-size:12.5px;margin:0;min-height:18px;text-align:center}

/* ---------- 布局 ---------- */
.layout{display:grid;grid-template-columns:280px 1fr;height:calc(100vh - 57px)}
.devices{background:#0c1526;border-right:1px solid var(--line);display:flex;flex-direction:column;overflow:hidden}
.aside-h{display:flex;flex-direction:column;gap:8px;padding:14px;border-bottom:1px solid var(--line);
  font-size:13px;color:var(--muted)}
.aside-h input{padding:6px 10px;font-size:12.5px}
#devlist{list-style:none;margin:0;padding:6px;overflow:auto;flex:1}
#devlist li{display:flex;align-items:center;gap:9px;padding:9px 11px;border-radius:8px;
  cursor:pointer;border:1px solid transparent}
#devlist li:hover{background:var(--panel)}
#devlist li.sel{background:var(--panel2);border-color:var(--acc)}
#devlist li b{font-weight:500;font-size:13px;flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#devlist li small{color:var(--muted);font-size:11.5px}
.aside-f{margin:0;padding:10px 14px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}
.detail{overflow:auto;padding:20px 24px}
.empty{margin-top:14vh;text-align:center;color:var(--muted)}
.panel-h{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.panel-h h2{font-size:18px}
.panel-h .ghost{margin-left:auto;padding:4px 10px;font-size:12px}
.tabs{display:flex;gap:6px;border-bottom:1px solid var(--line);margin-bottom:16px}
.tabs button{background:transparent;color:var(--muted);border:0;border-bottom:2px solid transparent;
  border-radius:0;padding:9px 14px}
.tabs button.on{color:var(--txt);border-bottom-color:var(--acc)}
.row{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:12px}
.row label{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.kvs{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}
.kv{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:12px 14px}
.kv span{display:block;color:var(--muted);font-size:12px;margin-bottom:4px}
.kv b{font-size:19px;font-weight:600;word-break:break-all}
.tbl{width:100%;border-collapse:collapse;font-size:12.5px}
.tbl th{text-align:left;color:var(--muted);font-weight:500;padding:7px 9px;border-bottom:1px solid var(--line)}
.tbl td{padding:7px 9px;border-bottom:1px solid #1d2a44;vertical-align:top;
  font-family:Consolas,monospace;font-size:12px;word-break:break-all}
.tbl tr:hover td{background:#131f36}
#chart{width:100%;background:var(--panel);border:1px solid var(--line);border-radius:10px;
  margin-bottom:16px;display:block}
@media(max-width:760px){
  .layout{grid-template-columns:1fr;height:auto}
  .devices{border-right:0;border-bottom:1px solid var(--line);max-height:44vh}
  .detail{padding:16px}
}