/* ...原来的 body 和 canvas 样式保持不变 ... */

#ui-panel {
    position: absolute;
    top: 20px;
    left: 20px;
    background: rgba(20, 20, 30, 0.8);
    color: #00ffcc; /* 极客荧光绿 */
    padding: 20px;
    border-radius: 8px;
    border: 1px solid #00ffcc;
    font-family: sans-serif;
    user-select: none;
}

#ui-panel h3 {
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 16px;
    border-bottom: 1px solid #00ffcc;
    padding-bottom: 5px;
}

.control-group {
    margin-bottom: 15px;
}

.control-group label {
    display: block;
    font-size: 14px;
    margin-bottom: 5px;
}

input[type=range] {
    width: 200px;
}

button {
    background: #00ffcc;
    color: #000;
    border: none;
    padding: 8px 15px;
    cursor: pointer;
    border-radius: 4px;
    font-weight: bold;
    width: 100%;
}

button:hover {
    background: #00ccaa;
}
/* 新增图表面板样式 */
#chart-panel {
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 400px;
    height: 250px;
    background: rgba(20, 20, 30, 0.85); /* 半透明深色背景 */
    border: 1px solid #00ffcc;
    border-radius: 8px;
    padding: 10px;
    box-shadow: 0 0 15px rgba(0, 255, 204, 0.2); /* 微微的荧光发光效果 */
    pointer-events: none; /* 让鼠标穿透图表背景，不影响拖拽3D画面 */
}