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;
}
#controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: #fff;
    box-shadow: 0 2px 8px rgba(30,144,255,0.08);
}
#map {
    width: 100vw;
    height: 80vh;
    margin: 0 auto;
    box-shadow: 0 2px 16px rgba(30,144,255,0.12);
    border-radius: 8px;
}
input, select, button {
    padding: 6px 12px;
    border-radius: 4px;
    border: 1px solid #d0d7de;
    font-size: 1em;
}
button {
    background: #1e90ff;
    color: #fff;
    border: none;
    cursor: pointer;
    transition: background 0.2s;
}
button:hover {
    background: #1565c0;
}