/* 自定义样式补充 */
.category-btn.active {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    color: white;
    font-weight: 600;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 卡片悬停效果增强 */
.download-card {
    transition: all 0.3s ease;
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* 加载动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}