/* 涟漪特效 */
.ripple {
    position: absolute;
    width: 20px;
    height: 20px;
    background: rgba(255, 255, 255, 0.5);
    /* 白色半透明 */
    border-radius: 50%;
    pointer-events: none;
    /* 不影响鼠标事件 */
    transform: translate(-50%, -50%) scale(0);
    animation: ripple-effect 1s ease-out;
}

@keyframes ripple-effect {
    0% {
        transform: translate(-50%, -50%) scale(0);
        opacity: 0.8;
    }

    100% {
        transform: translate(-50%, -50%) scale(2);
        /* 扩散到10倍大小 */
        opacity: 0;
    }
}