#splashScreen {
    position: fixed;
    inset: 0;
    background-color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* logo 通用样式 */
.logo {
    display: block;
    width: 45vw;
    /* ← 放大关键 */
    max-width: 340px;
    /* ← 放大上限 */
    max-height: 340px;
    height: auto;
    /* 高度自动 */
    object-fit: contain;
}