body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    font-family: "Microsoft YaHei", sans-serif;
}

#container {
    position: relative;
    width: 100%;
    height: 100%;
}

#map-container {
    width: 100%;
    height: 100%;
}

#sidebar {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.9);
    padding: 15px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
    width: 300px;
}

.control-panel h2 {
    margin-top: 0;
    color: #333;
    font-size: 18px;
}

.two-columns {
    display: flex;
}

.column {
    flex: 1;
    padding: 5px;
}

#province-select {
    width: 100%;
    padding: 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

#area-info {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: #1E88E5;
}