/* 按钮悬停动画 */
.btn {
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 15px #00BFFF;
}

/* 卡片悬停动画 */
.feature-item {
    transition: box-shadow 0.3s;
}

.feature-item:hover {
    box-shadow: 0 0 20px rgba(0, 191, 255, 0.5);
}