html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  font-family: sans-serif;
}

/* Cesium 地图全屏 */
#cesiumContainer {
  position: absolute;
  top: 0;
  left: 500px; /* 为侧边栏预留空间 */
  right: 0;
  bottom: 0;
  z-index: 0;
}

/* 侧边栏样式 */
#sidebar {
  position: absolute;
  top: 0;
  left: 0;
  width: 500px;
  bottom: 0;
  overflow-y: auto;
  background: url(../image/背景2.png);
  padding: 20px;
  box-sizing: border-box;
  z-index: 1;
  border-right: 1px solid #ccc;
}

#sidebar h2 {
  margin-top: 0;
}

/* 每个故事段落 */
.story-section {
  margin-bottom: 40px;
  padding: 10px;
  border-bottom: 1px solid #ddd;
  cursor: pointer;
  font-size: large;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
  border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.story-section.active {
  background: #f0f0f0;
}