body {
    padding: 0;
    margin: 0
}
#unity-container {
    position: fixed;
    width: 100%;
    height: 100%;
}
#unity-canvas {
    position: relative;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    max-width: 780px;
    height: 100%;
    background: url("bg.png");
    background-size: cover;
}
#unity-loading-bar {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    display: none
}
#unity-logo {
    width: 239px;
    height: 78px;
    background: url('logo.png') no-repeat center;
    background-size: 100% 100%;
}
#unity-progress-bar-empty {
    margin-left: auto;
    margin-right: auto;
    width: 239px;
    height: 10px; 
    margin-top: 20px; /* 與logo間格距離 */
    border: 1px solid #ffff; /* 邊框尺寸、形式、顏色 */
    border-radius: 3px; /* 圓角 */
    background-color: #c4c4c4; /* 底色*/
}
#unity-progress-bar-full {
    width: 0%;
    height: 10px; /* 與empty設定值一樣 */
    border-radius: 3px; /* 圓角 */
    background: #1e4991;  /* 底色*/
    /* 漸層色工具 => https://cssgradient.io/ */
}
#unity-warning {
    position: absolute;
    left: 50%;
    top: 5%;
    transform: translate(-50%);
    background: white;
    padding: 10px;
    display: none
}