body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background: #f0f0f0;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

h1 {
    margin-top: 20px;
    color: #333;
}

#game-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: #fff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
    margin-top: 20px;
}

#game-canvas {
    background: #e6f7ff;
    border: 2px solid #1890ff;
    border-radius: 8px;
    display: block;
    margin-bottom: 16px;
    max-width: 100vw;
    height: auto;
}

#ui-panel {
    display: flex;
    flex-direction: row;
    gap: 16px;
    align-items: center;
    margin-top: 8px;
}

button {
    padding: 8px 18px;
    font-size: 16px;
    border: none;
    border-radius: 6px;
    background: #1890ff;
    color: #fff;
    cursor: pointer;
    transition: background 0.2s;
}
button:hover {
    background: #40a9ff;
}

#score, #timer {
    font-size: 16px;
    color: #333;
}

@media (max-width: 600px) {
    #game-container {
        padding: 8px;
    }
    #ui-panel {
        flex-direction: column;
        gap: 8px;
    }
    #game-canvas {
        width: 98vw;
        max-width: 98vw;
    }
}