/* 水波纹效果 */
@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 1;
    }
    20% {
        transform: scale(25, 25);
        opacity: 1;
    }
    100% {
        opacity: 0;
        transform: scale(40, 40);
    }
}

/* 卡片悬停动画 */
@keyframes cardHover {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(-4px);
    }
}

/* 应用动画类 */
.card-hover {
    transition: transform var(--duration-medium) ease;
}

.card-hover:hover {
    transform: translateY(-4px);
}

/* 按钮点击效果 */
.btn-click-effect {
    position: relative;
    overflow: hidden;
}

.btn-click-effect:after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%, -50%);
    transform-origin: 50% 50%;
}

.btn-click-effect:focus:not(:active)::after {
    animation: ripple 0.6s ease-out;
}