/* 背景视频 */
#bg-video {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -2;
}

/* 视频遮罩层 - 增强文字可读性 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 17, 40, 0.6);
    z-index: -1;
    pointer-events: none;
}