如何使用css通过鼠标悬停显示与地图标记相关的信息？

<div id="map"></div>

#map {
  width: 500px;
  height: 400px;
}

.marker {
  width: 20px;
  height: 20px;
  background-color: red;
  border-radius: 50%;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.marker:hover {
  background-color: blue;
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.5);
}

.info {
  position: absolute;
  top: 0;
  left: 0;
  background-color: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 10px;
  display: none;
}

.marker:hover + .info {
  display: block;
}

// 使用地图API创建地图
var map = new BMap.Map("map");
map.centerAndZoom(new BMap.Point(116.404, 39.915), 11);

// 创建标记点
var marker = new BMap.Marker(new BMap.Point(116.404, 39.915));
map.addOverlay(marker);

// 监听鼠标悬停事件
marker.addEventListener("mouseover", function() {
  var info = document.querySelector(".info");
  info.style.display = "block";
});

marker.addEventListener("mouseout", function() {
  var info = document.querySelector(".info");
  info.style.display = "none";
});