/* 复古风格全局样式 */
:root {
    --primary-color: #3a5fcd; /* 青金石蓝 */
    --secondary-color: #8b4513; /*  saddle brown */
    --accent-color: #ff6347; /* tomato */
    --bg-color: #f5f5dc; /* beige */
    --text-color: #333;
    --light-color: #fff;
    --vintage-pattern: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect width="50" height="50" x="0" y="0" fill="%23f0e6d2"/><rect width="50" height="50" x="50" y="50" fill="%23f0e6d2"/></svg>');
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Courier New', Courier, monospace;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    background-image: var(--vintage-pattern);
    background-attachment: fixed;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 复古头部样式 */
header {
    background-color: var(--light-color);
    padding: 20px 0;
    border-bottom: 3px double var(--secondary-color);
    position: relative;
}

header::before {
    content: "";
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100%;
    height: 10px;
    background: repeating-linear-gradient(
        45deg,
        var(--secondary-color),
        var(--secondary-color) 10px,
        transparent 10px,
        transparent 20px
    );
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    font-size: 28px;
    font-weight: bold;
    font-family: 'Times New Roman', Times, serif;
    color: var(--primary-color);
    text-shadow: 2px 2px 0 rgba(0,0,0,0.1);
    letter-spacing: 2px;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

nav ul li a {
    padding: 8px 15px;
    border: 1px solid var(--secondary-color);
    border-radius: 0;
    font-weight: bold;
    color: var(--secondary-color);
}

nav ul li a:hover {
    background-color: var(--secondary-color);
    color: var(--light-color);
    text-decoration: none;
}

/* 复古主要内容区域 */
.main-content {
    background-color: var(--light-color);
    padding: 30px;
    margin: 40px 0;
    border: 1px solid var(--secondary-color);
    box-shadow: 8px 8px 0 rgba(0,0,0,0.1);
    position: relative;
}

.main-content::after {
    content: "";
    position: absolute;
    top: 5px;
    left: 5px;
    right: -5px;
    bottom: -5px;
    border: 1px solid var(--secondary-color);
    z-index: -1;
}

.section-title {
    font-size: 24px;
    margin-bottom: 25px;
    padding-bottom: 10px;
    border-bottom: 2px dotted var(--secondary-color);
    color: var(--primary-color);
    font-family: 'Times New Roman', Times, serif;
    letter-spacing: 1px;
}

/* 复古文章网格 */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.article-card {
    background-color: var(--light-color);
    border: 1px solid var(--secondary-color);
    transition: all 0.3s ease;
    position: relative;
}

.article-card:hover {
    transform: translate(-5px, -5px);
    box-shadow: 5px 5px 0 var(--secondary-color);
}

.card-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-bottom: 1px solid var(--secondary-color);
    filter: sepia(30%);
}

.card-body {
    padding: 20px;
}

.card-title {
    font-size: 20px;
    margin-bottom: 15px;
    font-weight: bold;
    color: var(--primary-color);
    font-family: 'Times New Roman', Times, serif;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    color: var(--secondary-color);
    margin-top: 15px;
    border-top: 1px dotted var(--secondary-color);
    padding-top: 10px;
}

/* 复古分类标签 */
.category-tag {
    display: inline-block;
    padding: 3px 10px;
    background-color: var(--primary-color);
    color: white;
    font-size: 12px;
    margin-bottom: 15px;
    position: relative;
}

.category-tag::after {
    content: "";
    position: absolute;
    bottom: -5px;
    left: 5px;
    width: calc(100% - 10px);
    height: 2px;
    background-color: var(--accent-color);
}

/* 复古文章详情页 */
.article-detail {
    max-width: 800px;
    margin: 0 auto;
}

.article-header {
    margin-bottom: 40px;
    text-align: center;
    border-bottom: 2px dotted var(--secondary-color);
    padding-bottom: 20px;
}

.article-title {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--primary-color);
    font-family: 'Times New Roman', Times, serif;
    letter-spacing: 1px;
}

.article-meta {
    display: flex;
    justify-content: center;
    gap: 20px;
    color: var(--secondary-color);
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.article-image {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    margin: 30px 0;
    border: 1px solid var(--secondary-color);
    filter: sepia(30%);
    box-shadow: 5px 5px 0 rgba(0,0,0,0.1);
}

.article-content {
    line-height: 1.8;
    font-size: 18px;
}

.article-content p {
    margin-bottom: 20px;
    text-align: justify;
}

.article-content img {
    max-width: 100%;
    height: auto;
    margin: 20px 0;
    border: 1px solid var(--secondary-color);
    padding: 5px;
    background-color: white;
}

/* 复古分页导航 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 40px;
}

.pagination a {
    padding: 8px 16px;
    border: 1px solid var(--secondary-color);
    color: var(--secondary-color);
    font-weight: bold;
}

.pagination a:hover {
    background-color: var(--secondary-color);
    color: white;
}

/* 复古友情链接 */
.friend-links {
    background-color: var(--light-color);
    padding: 25px;
    margin: 40px 0;
    border: 1px solid var(--secondary-color);
    position: relative;
}

.friend-links::before {
    content: "";
    position: absolute;
    top: -10px;
    left: -10px;
    right: 10px;
    bottom: 10px;
    border: 1px solid var(--secondary-color);
    z-index: -1;
}

.friend-links h3 {
    margin-bottom: 20px;
    color: var(--primary-color);
    font-family: 'Times New Roman', Times, serif;
    font-size: 22px;
}

.friend-links-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.friend-links-container a {
    padding: 5px 15px;
    border: 1px solid var(--secondary-color);
    color: var(--secondary-color);
    font-size: 14px;
}

.friend-links-container a:hover {
    background-color: var(--secondary-color);
    color: white;
}

/* 复古页脚样式 */
footer {
    background-color: var(--primary-color);
    color: white;
    padding: 30px 0;
    text-align: center;
    margin-top: 50px;
    border-top: 5px double var(--secondary-color);
    position: relative;
}

footer::before {
    content: "";
    position: absolute;
    top: -15px;
    left: 0;
    width: 100%;
    height: 10px;
    background: repeating-linear-gradient(
        45deg,
        var(--accent-color),
        var(--accent-color) 10px,
        transparent 10px,
        transparent 20px
    );
}

.copyright {
    font-size: 14px;
    letter-spacing: 1px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 20px;
    }
    
    nav ul {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .article-grid {
        grid-template-columns: 1fr;
    }
    
    .article-title {
        font-size: 26px;
    }
    
    .article-meta {
        gap: 10px;
    }
}