body { padding: 0; margin: 0 }
#unity-container { position: absolute }
#unity-container.unity-desktop { left: 50%; top: 50%; transform: translate(-50%, -50%) }
#unity-container.unity-mobile { position: fixed; width: 100%; height: 100% }
#unity-canvas { background: #231F20 }
.unity-mobile #unity-canvas { width: 100%; height: 100% }
#unity-loading-bar { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); display: none }
#unity-logo { width: 154px; height: 130px; background: url('unity-logo-dark.png') no-repeat center }
#unity-progress-bar-empty { width: 141px; height: 18px; margin-top: 10px; margin-left: 6.5px; background: url('progress-bar-empty-dark.png') no-repeat center }
#unity-progress-bar-full { width: 0%; height: 18px; margin-top: 10px; background: url('progress-bar-full-dark.png') no-repeat center }
#unity-footer { position: relative }
.unity-mobile #unity-footer { display: none }
#unity-webgl-logo { float:left; width: 204px; height: 38px; background: url('webgl-logo.png') no-repeat center }
#unity-build-title { float: right; margin-right: 10px; line-height: 38px; font-family: arial; font-size: 18px }
#unity-fullscreen-button { cursor:pointer; float: right; width: 38px; height: 38px; background: url('fullscreen-button.png') no-repeat center }
#unity-warning { position: absolute; left: 50%; top: 5%; transform: translate(-50%); background: white; padding: 10px; display: none }
#unity-container {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #E0F5FC; /* 背景色 */
}

/* 实际的 canvas 元素 */
#unity-canvas {
    /* 核心逻辑：使用 CSS aspect-ratio 锁定比例 */
    aspect-ratio: 9 / 16; 
    
    /* 让高度撑满，宽度自适应 */
    height: 100vh; 
    width: auto; 
    
    /* 或者：如果屏幕太窄，则让宽度撑满，高度自适应 */
    max-width: 100%; 
}