/* 清除默认边距，让AR场景全屏 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    overflow: hidden; /* 隐藏滚动条 */
    background-color: #000; /* 背景设为黑色，适配AR场景 */
}

/* AR场景全屏 */
a-scene {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
}