/* 全局样式 */
html {
    scroll-behavior: smooth;
}

/* 自定义动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    opacity: 0;
    animation: fadeIn 0.8s ease-out forwards;
}

/* 为不同卡片添加延迟，创造错落感 */
.fade-in:nth-child(1) { animation-delay: 0.1s; }
.fade-in:nth-child(2) { animation-delay: 0.3s; }
.fade-in:nth-child(3) { animation-delay: 0.5s; }
.fade-in:nth-child(4) { animation-delay: 0.7s; }

/* 导航栏激活状态 */
.nav-active {
    color: #2563eb; /* blue-600 */
    font-weight: 600;
}

/* 移动端菜单样式 */
.mobile-menu {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: white;
    padding: 1rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transform: translateY(-100%);
    transition: transform 0.3s ease;
}

.mobile-menu.active {
    display: block;
    transform: translateY(0);
}

/* 按钮悬停效果 */
.btn-hover {
    transition: transform 0.2s ease;
}

.btn-hover:hover {
    transform: translateY(-2px);
}

/* 添加加载状态样式 */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 优化可访问性 */
@media (prefers-reduced-motion: reduce) {
    .fade-in {
        transition: none;
    }
}