body {
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
}

#game-container {
    position: relative;
}

#gameCanvas {
    display: block; /* 防止出现滚动条 */
    width: 100vw;
    height: 100vh;
    background-color: #708090;  /* 更深的灰蓝色（slate gray） */
    box-shadow: 0 0 10px rgba(0,0,0,0.5);
}