/* 卡片悬停动画 */
.card.hover-lift {
  transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}
.card.hover-lift:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
}

/* 按钮涟漪效果 */
.btn.ripple-surface {
  position: relative;
  overflow: hidden;
}
.btn.ripple-surface::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 5px;
  height: 5px;
  background: rgba(255, 255, 255, 0.7);
  opacity: 0;
  border-radius: 50%;
  transform: scale(1, 1) translate(-50%, -50%);
  transform-origin: 50% 50%;
}
.btn.ripple-surface:active::after {
  animation: ripple 0.6s ease-out;
}
@keyframes ripple {
  0% {
    transform: scale(0, 0);
    opacity: 0.5;
  }
  100% {
    transform: scale(20, 20);
    opacity: 0;
  }
}

/* 背景模糊（可选） */
.bg-body {
  backdrop-filter: blur(8px);
  background-color: rgba(255, 255, 255, 0.8)!important;
}