/* 基础样式 */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

/* 导航菜单样式 */
.menu {
	transition: all 0.3s ease;
    background-color: #333;
    padding: 1rem;
}

.menu ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 1rem;
}

.menu li {
    margin: 0;
}

.menu a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.menu a:hover, .menu a.active {
    background-color: #555;
}

.copyright {
    text-align: center;
    padding: 20px;
    margin-top: 40px;
    color: #666;
    font-size: 0.9em;
    border-top: 1px solid #eee;
}

.page {
    display: none;
    animation: fadeIn 0.5s ease-in-out; /* 应用淡入动画 */
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); } /* 初始状态：透明且下移 */
    to { opacity: 1; transform: translateY(0); } /* 结束状态：不透明且原位 */
}

.page.active {
    display: block;
}