:root{
  --bg:#f6f8fb; --card:#ffffff; --primary:#2563eb; --accent:#d97706;
  --text:#1e293b; --muted:#64748b; --border:#e2e8f0;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);font-size:14px;line-height:1.6}
a{color:var(--primary);text-decoration:none}
.layout{display:flex;min-height:100vh}
.sidebar{width:220px;background:#0f172a;color:#cbd5e1;padding:18px 0;flex-shrink:0}
.sidebar h1{font-size:15px;color:#fff;padding:0 18px 14px;margin:0;border-bottom:1px solid #1e293b}
.sidebar .nav a{display:block;padding:10px 18px;color:#cbd5e1;font-size:13px}
.sidebar .nav a:hover,.sidebar .nav a.active{background:#1e293b;color:#fff}
.main{flex:1;padding:24px 30px;overflow:auto}
.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.topbar h2{margin:0;font-size:20px}
.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:12px;font-weight:600}
.badge.offline{background:#fef3c7;color:#92400e}
.badge.online{background:#dcfce7;color:#166534}
.badge.green{background:#dcfce7;color:#166534}
.badge.red{background:#fee2e2;color:#991b1b}
.badge.amber{background:#fef3c7;color:#92400e}
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:18px;margin-bottom:18px;
  box-shadow:0 1px 2px rgba(15,23,42,.04)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.stat{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px}
.stat .num{font-size:26px;font-weight:700;color:var(--primary)}
.stat .lbl{color:var(--muted);font-size:13px}
table{width:100%;border-collapse:collapse;background:var(--card);border-radius:10px;overflow:hidden}
th,td{padding:10px 12px;border-bottom:1px solid var(--border);text-align:left;font-size:13px}
th{background:#f1f5f9;color:var(--muted);font-weight:600}
tr:hover td{background:#f8fafc}
.btn{display:inline-block;padding:8px 14px;border-radius:8px;border:1px solid var(--border);background:#fff;
  color:var(--text);cursor:pointer;font-size:13px}
.btn:hover{border-color:var(--primary);color:var(--primary)}
.btn.primary{background:var(--primary);color:#fff;border-color:var(--primary)}
.btn.primary:hover{opacity:.9;color:#fff}
.btn.accent{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn.sm{padding:5px 10px;font-size:12px}
.btn.danger{color:#b91c1c;border-color:#fecaca}
.btn.danger:hover{background:#fee2e2;color:#991b1b;border-color:#fca5a5}
input,select,textarea{width:100%;padding:9px 11px;border:1px solid var(--border);border-radius:8px;
  font-size:13px;font-family:inherit;background:#fff;color:var(--text)}
textarea{resize:vertical;min-height:90px}
label{font-size:13px;color:var(--muted);display:block;margin:10px 0 4px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.block-group{border:1px solid var(--border);border-radius:10px;padding:12px;margin-bottom:12px;background:#fcfdff}
.block-group h4{margin:0 0 8px;font-size:14px;color:var(--primary)}
.check{display:flex;gap:8px;align-items:flex-start;padding:6px 0;border-bottom:1px dashed var(--border)}
.check:last-child{border-bottom:none}
.check input{width:auto;margin-top:3px}
.preview{background:#0f172a;color:#e2e8f0;border-radius:10px;padding:14px;font-family:ui-monospace,Menlo,Consolas,monospace;
  font-size:12px;white-space:pre-wrap;max-height:360px;overflow:auto}
.scorebar{height:6px;border-radius:4px;background:var(--border);overflow:hidden;margin-top:3px}
.scorebar > i{display:block;height:100%}
.muted{color:var(--muted)}
.pill{display:inline-block;padding:2px 8px;border-radius:6px;background:#eff6ff;color:var(--primary);font-size:12px;margin:2px}
.login-wrap{max-width:360px;margin:12vh auto;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:28px}
.alert{padding:10px 14px;border-radius:8px;margin-bottom:14px;font-size:13px}
.alert.ok{background:#dcfce7;color:#166534}
.alert.err{background:#fee2e2;color:#991b1b}
.flex{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.spacer{flex:1}

/* 响应式：窄屏适配 */
@media (max-width:860px){
  .layout{flex-direction:column}
  .sidebar{width:100%;padding:12px 0}
  .sidebar h1{border-bottom:none;padding:0 14px 8px}
  .sidebar .nav{display:flex;flex-wrap:wrap;gap:4px}
  .sidebar .nav a{padding:8px 12px;border-radius:8px;background:#1e293b}
  .sidebar .nav a:last-child{margin-left:auto}
  .main{padding:16px}
  .topbar{flex-direction:column;align-items:flex-start;gap:8px}
  .form-row{grid-template-columns:1fr}
  .grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}
}
@media (max-width:560px){
  table{display:block;overflow-x:auto;white-space:nowrap}
  .card{padding:14px}
}