:root{
  --primary:#2563ff;--primary-dark:#1d4ed8;
  --sidebar:#0f172a;--sidebar-active:#1e293b;
  --bg:#f3f4f6;--card:#fff;--text:#1f2937;--text-secondary:#6b7280;
  --border:#e5e7eb;--success:#10b981;--danger:#ef4444;--warning:#f59e0b;
  --muted:#9ca3af;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:system-ui,-apple-system,'Microsoft YaHei',sans-serif;background:var(--bg);color:var(--text);font-size:14px}
.app{display:flex;min-height:100vh}

/* 左侧导航 */
.sidebar{width:210px;background:var(--sidebar);color:#fff;flex-shrink:0;display:flex;flex-direction:column}
.sidebar .brand{padding:18px 20px;font-size:16px;font-weight:700;border-bottom:1px solid rgba(255,255,255,.08);display:flex;align-items:center;gap:10px}
.sidebar .brand .logo{width:28px;height:28px;background:var(--primary);border-radius:6px;display:flex;align-items:center;justify-content:center;font-size:13px}
.sidebar nav{flex:1;padding:12px 0}
.sidebar nav a{display:flex;align-items:center;gap:10px;padding:12px 20px;color:#cbd5e1;text-decoration:none;cursor:pointer;transition:.15s}
.sidebar nav a:hover{background:rgba(255,255,255,.04);color:#fff}
.sidebar nav a.active{background:var(--sidebar-active);color:#fff;border-right:3px solid var(--primary)}
.sidebar .user{padding:14px 20px;border-top:1px solid rgba(255,255,255,.08);font-size:12px;color:#94a3b8}

/* 主内容区 */
.main{flex:1;display:flex;flex-direction:column;min-width:0}
.header{height:56px;background:var(--card);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;box-shadow:0 1px 2px rgba(0,0,0,.04)}
.header h1{font-size:16px;font-weight:600}
.header .actions{display:flex;align-items:center;gap:12px}
.content{flex:1;padding:20px 24px;overflow:auto}
.page{display:none}
.page.active{display:block}

/* 统计卡片 */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:16px;margin-bottom:20px}
.stat-card{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:18px;box-shadow:0 1px 2px rgba(0,0,0,.03)}
.stat-card .label{font-size:13px;color:var(--text-secondary);margin-bottom:6px}
.stat-card .value{font-size:26px;font-weight:700}
.stat-card .value.up{color:var(--success)}

/* 卡片 */
.card{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:20px;margin-bottom:16px;box-shadow:0 1px 2px rgba(0,0,0,.03)}
.card h3{font-size:15px;font-weight:600;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.card h3 .tag{font-size:12px;background:#eef2ff;color:var(--primary);padding:2px 8px;border-radius:12px;font-weight:500}

/* 表单 */
.form-row{display:flex;gap:12px;align-items:flex-end;margin-bottom:12px;flex-wrap:wrap}
.form-group{display:flex;flex-direction:column;gap:6px}
.form-group label{font-size:12px;color:var(--text-secondary)}
input,select,textarea{padding:8px 12px;border:1px solid var(--border);border-radius:6px;font-size:13px;outline:none;font-family:inherit}
input:focus,select:focus,textarea:focus{border-color:var(--primary)}

/* 按钮 */
button.btn{padding:8px 16px;border:none;border-radius:6px;cursor:pointer;font-size:13px;transition:.15s;font-family:inherit}
button.btn-primary{background:var(--primary);color:#fff}
button.btn-primary:hover{background:var(--primary-dark)}
button.btn-success{background:var(--success);color:#fff}
button.btn-danger{background:var(--danger);color:#fff}
button.btn-warning{background:var(--warning);color:#fff}
button.btn-default{background:#fff;border:1px solid var(--border);color:var(--text)}
button.btn-sm{padding:5px 10px;font-size:12px;margin-right:4px}
button:disabled{opacity:.6;cursor:not-allowed}

/* 表格 */
table{width:100%;border-collapse:collapse;font-size:13px}
th,td{padding:11px 12px;text-align:left;border-bottom:1px solid var(--border)}
th{background:#f9fafb;color:var(--text-secondary);font-weight:500;font-size:12px}
tr:hover{background:#fafafa}
.badge{display:inline-block;padding:3px 8px;border-radius:12px;font-size:11px;font-weight:500}
.badge-success{background:#d1fae5;color:#065f46}
.badge-warning{background:#fef3c7;color:#92400e}
.badge-danger{background:#fee2e2;color:#991b1b}
.badge-default{background:#f3f4f6;color:#4b5563}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;background:#f3f4f6;padding:2px 6px;border-radius:4px;font-size:12px}

/* 图 */
.chart-container{position:relative;height:230px;margin-top:10px}
.chart-container canvas{width:100%;height:100%}

.empty{color:var(--text-secondary);text-align:center;padding:30px 0;font-size:13px}
.msg{font-size:13px;min-height:18px}

/* 登录 */
.login-wrap{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#eef2ff 0%,#f3f4f6 100%)}
.login-box{width:360px;background:var(--card);border-radius:12px;padding:32px;box-shadow:0 10px 40px rgba(0,0,0,.08)}
.login-box h2{font-size:20px;margin-bottom:6px}
.login-box p{color:var(--text-secondary);font-size:13px;margin-bottom:20px}
.login-box input{width:100%;margin-bottom:12px;padding:10px 12px}
.login-box button{width:100%;padding:10px}

/* 响应式 */
@media(max-width:900px){.sidebar{width:64px}.sidebar .brand span,.sidebar nav a span,.sidebar .user{display:none}.sidebar nav a{justify-content:center;padding:14px 0}}