:root {
  --bg: #0f172a;
  --card: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --primary: #2563eb;
  --danger: #ef4444;
  --border: #1f2937;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: baseline; gap: 16px;
}
.app-header h1 { margin: 0; font-size: 20px; }
.baseline { color: var(--muted); }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px;
  display: grid;
  gap: 20px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}
.card h2 { margin: 0 0 12px; font-size: 18px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 12px;
}

label { display: grid; gap: 6px; font-size: 14px; }
input, select {
  background: #0b1220;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
}

.advanced summary { cursor: pointer; }
.advanced { margin-top: 12px; }

.import-controls { display: flex; gap: 10px; align-items: center; }

.btn {
  appearance: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #0b1220;
  color: var(--text);
  padding: 8px 12px;
  cursor: pointer;
}
.btn:hover { border-color: #2b3446; }
.btn.primary { background: var(--primary); border-color: var(--primary); }

.actions { display: flex; gap: 10px; align-items: center; margin-bottom: 8px; }

.table-wrap { overflow: auto; border: 1px solid var(--border); border-radius: 8px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
thead th { position: sticky; top: 0; background: #0b1220; }
th, td { border-bottom: 1px solid var(--border); padding: 10px; text-align: left; }
tbody tr:hover { background: #0b1220; }

.errors { color: var(--danger); margin-top: 10px; }

.analysis { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin-top: 8px; }
.metric { display: grid; gap: 6px; padding: 10px; background: #0b1220; border: 1px solid var(--border); border-radius: 8px; }
.metric span { color: var(--muted); }
.metric strong { font-size: 16px; }

.formula { color: var(--muted); font-size: 13px; margin-top: 6px; }

.footer { text-align: center; color: var(--muted); padding: 20px; }

/* 联系与服务样式 */
.contact { margin-top: 16px; }
.qr-wrap { display:flex; flex-direction: column; align-items: center; gap: 8px; }
.qr { width: 220px; height: auto; border-radius: 8px; box-shadow: 0 2px 12px rgba(0,0,0,0.08); }
.qr-tip { color:#666; font-size: 12px; }

/* 年度税负模块微调 */
#annual .table-wrap { margin-top: 8px; }
#annual h3 { font-size: 16px; }
#annual .actions { display:flex; gap:8px; margin-top:8px; }
#annual .analysis { display:grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap:8px; }
#annual .metric { background:#f7f7f8; border:1px solid #e5e7eb; border-radius:6px; padding:8px; }
#annual .metric span { color:#374151; font-size:12px; }
#annual .metric strong { font-size:16px; color:#111827; font-weight:600; }
#annual .mode-switch { border:1px solid #eee; border-radius:6px; padding:8px; display:flex; gap:12px; align-items:center; }
#annual .mode-switch legend { font-size:12px; color:#666; margin-right:6px; }
#annual .fill-grid { margin-top:8px; display:grid; gap:8px; }
#annual textarea#annualPaste { width:100%; min-height:70px; resize:vertical; }
.muted { color:#888; font-size:12px; }

/* Responsive tweaks */
@media (max-width: 640px) {
  .app-header { flex-direction: column; align-items: flex-start; }
}