body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

/* 头部样式 */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background-color: #fff;
    border-bottom: 1px solid #ccc;
}

.header .logo img {
    height: 40px;
}

.header nav {
    display: flex;
    gap: 15px;
}

.header nav a {
    text-decoration: none;
    color: #333;
    font-weight: bold;
    padding: 8px 12px;
    border-radius: 5px;
}

.header nav a:hover {
    background-color: #eee;
}

.header .search-login {
    display: flex;
    gap: 10px;
}

.header .menu-toggle {
    display: none;
}

/* 移动端样式 */
@media (max-width: 768px) {
    .header nav {
        display: none;
        flex-direction: column;
        gap: 10px;
        background-color: #fff;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        padding: 10px 20px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    }

    .header .menu-toggle {
        display: block;
        cursor: pointer;
    }
}

/* 主内容样式 */
.main-content {
    display: flex;
    flex-direction: column;
    margin: 20px auto;
    max-width: 1200px;
    gap: 20px;
    padding: 0 20px;
}

.main-content .articles,
.main-content .sidebar {
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.main-content .articles {
    flex: 3;
}

.main-content .sidebar {
    flex: 1;
}

.article {
    display: flex;
    flex-direction: column;
    margin-bottom: 20px;
    border-bottom: 1px solid #ddd;
    padding-bottom: 10px;
}

.article img {
    max-width: 100%;
    margin-bottom: 10px;
    border-radius: 5px;
}

.article-title {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 5px;
}

.article-meta {
    font-size: 12px;
    color: #999;
    margin-bottom: 10px;
}

/* 底部样式 */
.footer {
    text-align: center;
    padding: 20px;
    background-color: #003366;
    color: #fff;
    margin-top: 40px;
}

@media (min-width: 769px) {
    .main-content {
        flex-direction: row;
    }

    .article {
        flex-direction: row;
    }

    .article img {
        max-width: 150px;
        margin-right: 15px;
        margin-bottom: 0;
    }

    .article-content {
        max-width: calc(100% - 150px);
    }
}