.text {
    pointer-events: none;
    position: fixed; /* ← 改这里 */
    font-size: 18px;
    opacity: 1;
    animation: riseAndFade 1.8s forwards;
    font-family: "Times", serif;
    z-index: 9999;
}
.xian {
    position: fixed; /* ← 改这里 */
    width: 3px;
    height: 3px;
    border-radius: 50%;
    pointer-events: none;
    animation: riseAndFade 1.8s forwards;
    z-index: 9998;
}

@keyframes riseAndFade {
    0% {
        opacity: 1;
    }
    100% {
        left:var(--tx);
        top:var(--ty);
        opacity: 0;
    }
}