/* 重置默认样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
}

/* 头部样式 */
header {
    background-color: #f4f4f4;
    /* padding: 1rem; */
    text-align: center;
}

nav ul {
    list-style: none;
    padding: 1rem 0;
}

nav ul li {
    display: inline;
    margin: 0 1rem;
}

nav ul li a {
    text-decoration: none;
    color: #333;
}

nav ul li a:hover {
    color: #007bff;
}

/* 主要内容区域 */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

section {
    margin-bottom: 2rem;
}

h1, h2 {
    margin-bottom: 1rem;
}

/* 页脚样式 */
footer {
    background-color: #222;
    color: #aaa;
    padding: 40px 0;
    position: relative;
    bottom: auto;
    width: 100%;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 0 20px;
}

.footer-section {
    flex: 1;
    min-width: 250px;
    margin-bottom: 20px;
}

.footer-title {
    color: white;
    margin-bottom: 20px;
    font-size: 1.2rem;
}

.footer-links a {
    display: block;
    color: #aaa;
    text-decoration: none;
    margin-bottom: 10px;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #2ecc71;
}

.social-icons {
    margin-top: 20px;
}

.social-icons a {
    display: inline-block;
    width: 40px;
    height: 40px;
    background-color: #333;
    color: white;
    text-align: center;
    line-height: 40px;
    border-radius: 50%;
    margin-right: 10px;
    transition: all 0.3s ease;
}

.social-icons a:hover {
    background-color: #2ecc71;
    transform: translateY(-5px);
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #444;
    margin-top: 30px;
    color: #666;
}

/* 响应式设计 */
@media (max-width: 768px) {
    nav ul li {
        display: block;
        margin: 0.5rem 0;
    }
    
    main {
        margin: 1rem auto;
    }
    
    .footer-content {
        flex-direction: column;
    }
    
    .footer-section {
        margin-bottom: 30px;
    }
}