/* 拟物化设计风格 - 木质主题 */
:root {
    --wood-color: #8B4513;
    --wood-light: #A0522D;
    --wood-dark: #5D2906;
    --leather-color: #6B4423;
    --leather-light: #8B5A2B;
    --paper-color: #F5F5DC;
    --metal-color: #B87333;
    --text-color: #3E2723;
    --text-light: #5D4037;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Times New Roman', Georgia, serif;
}

body {
    background-color: var(--paper-color);
    color: var(--text-color);
    line-height: 1.6;
    background-image: 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="100" height="100" fill="%23F5F5DC"/><path d="M0,0 L100,0 L100,5 L0,5 Z" fill="%238B4513" opacity="0.1"/><path d="M0,10 L100,10 L100,15 L0,15 Z" fill="%238B4513" opacity="0.1"/></svg>');
    background-size: 100px 100px;
}

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

a:hover {
    color: var(--metal-color);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 拟物化头部 - 木质面板 */
header {
    background-color: var(--wood-color);
    background-image: 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="100" height="100" fill="%238B4513"/><path d="M0,20 L100,20 L100,25 L0,25 Z" fill="%23A0522D" opacity="0.3"/><path d="M0,40 L100,40 L100,45 L0,45 Z" fill="%23A0522D" opacity="0.3"/></svg>');
    padding: 15px 0;
    border-bottom: 8px solid var(--wood-dark);
    box-shadow: 0 10px 20px rgba(0,0,0,0.3), 
                inset 0 -5px 10px rgba(0,0,0,0.2);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo {
    font-size: 28px;
    font-weight: bold;
    color: white;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    letter-spacing: 2px;
    font-family: 'Copperplate', 'Times New Roman', serif;
    padding: 10px 20px;
    background-color: var(--wood-dark);
    border-radius: 5px;
    border: 2px solid rgba(255,255,255,0.1);
    box-shadow: inset 0 0 10px rgba(0,0,0,0.3);
}

/* 拟物化导航 - 皮革标签 */
nav ul {
    display: flex;
    list-style: none;
    gap: 15px;
}

nav ul li a {
    display: block;
    padding: 10px 20px;
    background-color: var(--leather-color);
    color: white;
    border-radius: 15px 15px 0 0;
    font-weight: bold;
    border: 1px solid var(--leather-light);
    border-bottom: none;
    box-shadow: 0 -3px 5px rgba(0,0,0,0.2);
    position: relative;
    transition: all 0.3s;
}

nav ul li a:hover {
    background-color: var(--leather-light);
    transform: translateY(-3px);
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 5px;
    background-color: var(--wood-color);
    z-index: -1;
}

/* 拟物化内容区域 - 钉在木质板上的纸张 */
.main-content {
    background-color: var(--paper-color);
    margin: 30px 0;
    padding: 30px;
    border: 1px solid #D2B48C;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2), 
                inset 0 0 50px rgba(139,69,19,0.1);
    position: relative;
    border-radius: 2px;
}

.main-content::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 50px;
    width: 20px;
    height: 20px;
    background-color: var(--metal-color);
    border-radius: 50%;
    box-shadow: inset 0 0 5px rgba(0,0,0,0.5);
}

.main-content::after {
    content: '';
    position: absolute;
    top: -10px;
    right: 50px;
    width: 20px;
    height: 20px;
    background-color: var(--metal-color);
    border-radius: 50%;
    box-shadow: inset 0 0 5px rgba(0,0,0,0.5);
}

.section-title {
    font-size: 24px;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--wood-light);
    color: var(--wood-dark);
    font-family: 'Copperplate', 'Times New Roman', serif;
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* 拟物化文章卡片 - 照片角钉效果 */
.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.article-card {
    background-color: white;
    border: 1px solid #D2B48C;
    padding: 20px;
    position: relative;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    transition: all 0.3s;
    background-image: 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="100" height="100" fill="white"/></svg>');
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.article-card::before {
    content: '';
    position: absolute;
    top: -8px;
    right: -8px;
    width: 30px;
    height: 30px;
    background: radial-gradient(circle, var(--metal-color) 40%, transparent 42%);
    border-radius: 50%;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

.card-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border: 1px solid #D2B48C;
    margin-bottom: 15px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.card-body {
    padding: 0 10px;
}

.card-title {
    font-size: 18px;
    margin-bottom: 12px;
    font-weight: bold;
    color: var(--wood-dark);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 14px;
    color: var(--text-light);
    margin-top: 15px;
    font-style: italic;
}

/* 分类标签 - 皮革质感 */
.category-tag {
    display: inline-block;
    padding: 3px 12px;
    background-color: var(--leather-color);
    color: white;
    border-radius: 15px;
    font-size: 12px;
    margin-bottom: 15px;
    border: 1px solid var(--leather-light);
    box-shadow: inset 0 0 5px rgba(0,0,0,0.2);
}

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

.article-header {
    margin-bottom: 40px;
    text-align: center;
    border-bottom: 2px solid var(--wood-light);
    padding-bottom: 20px;
}

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

.article-meta {
    display: flex;
    justify-content: center;
    gap: 25px;
    color: var(--text-light);
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.article-image {
    width: 100%;
    max-height: 450px;
    object-fit: cover;
    border: 5px solid white;
    margin-bottom: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    position: relative;
}

.article-image::before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    width: 30px;
    height: 30px;
    background: radial-gradient(circle, var(--metal-color) 40%, transparent 42%);
    border-radius: 50%;
    box-shadow: 0 2px 5px rgba(0,0,0,0.3);
}

.article-content {
    line-height: 1.8;
    font-size: 17px;
}

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

.article-content img {
    max-width: 100%;
    height: auto;
    border: 3px solid white;
    box-shadow: 0 3px 10px rgba(0,0,0,0.2);
    margin: 20px 0;
}

/* 分页导航 - 木质按钮 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 40px;
}

.pagination a {
    padding: 10px 20px;
    border-radius: 5px;
    background-color: var(--wood-color);
    color: white;
    border: 1px solid var(--wood-dark);
    box-shadow: inset 0 0 10px rgba(0,0,0,0.2), 
                0 3px 5px rgba(0,0,0,0.2);
    transition: all 0.3s;
}

.pagination a:hover {
    background-color: var(--wood-light);
    transform: translateY(-3px);
}

/* 友情链接 - 木质面板 */
.friend-links {
    background-color: var(--wood-color);
    background-image: 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="100" height="100" fill="%238B4513"/><path d="M0,20 L100,20 L100,25 L0,25 Z" fill="%23A0522D" opacity="0.3"/></svg>');
    padding: 25px;
    margin: 30px 0;
    border-radius: 5px;
    border: 1px solid var(--wood-dark);
    box-shadow: inset 0 0 20px rgba(0,0,0,0.2);
}

.friend-links h3 {
    margin-bottom: 20px;
    color: white;
    font-size: 20px;
    text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
    font-family: 'Copperplate', 'Times New Roman', serif;
}

.friend-links-container {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.friend-links-container a {
    padding: 8px 15px;
    background-color: var(--leather-color);
    border-radius: 15px;
    font-size: 14px;
    color: white;
    border: 1px solid var(--leather-light);
    box-shadow: inset 0 0 5px rgba(0,0,0,0.2);
}

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

/* 拟物化页脚 - 木质底座 */
footer {
    background-color: var(--wood-dark);
    background-image: 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="100" height="100" fill="%235D2906"/><path d="M0,30 L100,30 L100,35 L0,35 Z" fill="%238B4513" opacity="0.3"/></svg>');
    padding: 30px 0;
    text-align: center;
    margin-top: 50px;
    border-top: 8px solid var(--wood-color);
    box-shadow: inset 0 10px 20px rgba(0,0,0,0.3);
}

.copyright {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
}

/* 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: 15px;
    }
}