#dynamicVideoBg {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    height: 100% !important;
    object-fit: cover !important;
    z-index: -9999 !important;
    pointer-events: none !important;
}

body::after {
    content: "";
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.2);  /* 调低遮罩，让文字清晰 */
    pointer-events: none;
    z-index: -9998;
}

body {
    background: transparent !important;
    margin: 0;
    padding: 0;
}