/* 通用样式：简洁企业级风格 */
:root {
  --bg: #f6f8fb;
  --text: #1b2733;
  --muted: #506176;
  --brand: #2B6CB0;
  --brand-2: #3182CE;
  --card: #ffffff;
  --line: #e6e8ee;
  --good: #2f855a;
  --warn: #b7791f;
}
* { box-sizing: border-box; }
html, body { padding:0; margin:0; font-family: "Segoe UI", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; color:var(--text); background:var(--bg); }

.app-header { height:64px; display:flex; align-items:center; justify-content:space-between; padding:0 24px; background:var(--card); border-bottom:1px solid var(--line); position:sticky; top:0; z-index:10; }
.app-header .brand { font-weight:600; color:var(--brand); }
.app-header .btn { color:#fff; background:var(--brand); padding:8px 12px; border-radius:8px; text-decoration:none; }

.layout { display:grid; grid-template-columns: 240px 1fr; min-height: calc(100vh - 64px); }
.sidebar { background:var(--card); border-right:1px solid var(--line); padding:16px; }
.sidebar h3 { margin:8px 0 12px; font-size:15px; color:var(--muted); }
.nav a { display:block; padding:10px 12px; border-radius:8px; color:var(--text); text-decoration:none; margin-bottom:6px; }
.nav a.active, .nav a:hover { background:#eaf2fb; color:var(--brand); }

.main { padding:20px; }
.section { display:none; }
.section.active { display:block; }
.section h2 { margin-top:0; }

.card { background:var(--card); border:1px solid var(--line); border-radius:12px; padding:16px; box-shadow: 0 2px 6px rgba(27,39,51,.06); }
.grid-2 { display:grid; grid-template-columns: repeat(2, 1fr); gap:16px; }
.grid-3 { display:grid; grid-template-columns: repeat(3, 1fr); gap:16px; }
.grid-auto { display:grid; grid-template-columns: repeat(auto-fill,minmax(260px,1fr)); gap:16px; }
.kpi { display:flex; align-items:center; justify-content:space-between; }
.kpi .big { font-size:24px; font-weight:600; }
.kpi .desc { color:var(--muted); }

.table { width:100%; border-collapse: collapse; margin-top:10px; }
.table th, .table td { border:1px solid var(--line); padding:8px; text-align:left; font-size:14px; }
.table th { background:#f1f5fb; }
.badge { display:inline-block; padding:2px 8px; border-radius:999px; font-size:12px; }
.badge.ok { background:#e6fffa; color:var(--good); border:1px solid #b2f5ea; }
.badge.warn { background:#fffaf0; color:var(--warn); border:1px solid #fed7aa; }

.form-row { display:grid; grid-template-columns: 160px 1fr; gap:12px; align-items:center; margin:8px 0; }
.input, select { width:100%; padding:8px; border:1px solid var(--line); border-radius:8px; background:#fff; }
.btn { display:inline-block; padding:8px 12px; background:var(--brand); color:#fff; border-radius:8px; border:none; cursor:pointer; }
.btn.secondary { background:#718096; }
.btn.ghost { background:transparent; color:var(--brand); border:1px solid var(--brand); }
.toolbar { display:flex; gap:8px; align-items:center; margin:12px 0; }

.hero { padding:24px; border:1px dashed var(--line); border-radius:12px; background:#fcfdff; }
.note { color:var(--muted); font-size:13px; }
footer { padding:20px; text-align:center; color:var(--muted); }

/* 移动端适配 */
@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { border-right:none; border-bottom:1px solid var(--line); }
}