body {
    margin: 0;
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background: #f4f6fa;
}
header {
    background: #1e90ff;
    color: #fff;
    padding: 16px 0;
    text-align: center;
    font-size: 1.5em;
    letter-spacing: 2px;
}
#map {
    width: 100vw;
    height: 80vh;
}
#controls {
    padding: 12px;
    background: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    position: absolute;
    top: 80px;
    left: 20px;
    z-index: 1000;
    border-radius: 8px;
    display: flex;
    gap: 10px;
    align-items: center;
}
#controls label {
    margin-right: 4px;
}
#controls input, #controls select, #controls button {
    font-size: 1em;
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid #ccc;
}
#controls button {
    background: #1e90ff;
    color: #fff;
    border: none;
    cursor: pointer;
    transition: background 0.2s;
}
#controls button:hover {
    background: #005fa3;
}