/* ============ 布局：顶部导航 + 地图 + 侧栏 ============ */
.topbar {
  position: sticky; top: 0; z-index: 200;
  height: var(--topbar-h);
  display: flex; align-items: center; gap: 16px;
  padding: 0 20px;
  background: linear-gradient(120deg, var(--primary-2), var(--primary));
  color: #fff;
  box-shadow: 0 2px 12px rgba(0, 0, 0, .14);
}
.brand { font-size: 18px; font-weight: 700; letter-spacing: .5px; white-space: nowrap; }
.topnav { display: flex; gap: 6px; margin-left: auto; }

.main {
  display: grid;
  grid-template-columns: 1fr var(--panel-w);
  height: auto;
}
.map-wrap { position: relative; min-width: 0; height: 62vh; min-height: 420px; }
#map { width: 100%; height: 100%; background: #e8edf2; }
.panel {
  background: var(--card);
  border-left: 1px solid var(--border);
  overflow-y: auto; overflow-x: hidden;
  height: 62vh; min-height: 420px;
}