/*
 * 单篇文章页样式
 * 包含文章详情页的所有样式
 * 
 * @package MTO Moving
 * @since 1.0.0
 */

/* ==========================================================================
   文章容器
   ========================================================================== */

.single-post {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
}

.single-post .post {
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    padding: var(--spacing-xl);
}
/* ==========================================================================
   文章头部
   ========================================================================== */

.single-post .entry-header {
    margin-bottom: var(--spacing-xl);
}

/* 文章特色图片 */
.single-post .post-thumbnail {
    margin-bottom: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.single-post .post-thumbnail img {
    width: 100%;
    height: auto;
    display: block;
    max-height: 600px;
    object-fit: cover;
}

/* 文章元信息 */
.single-post .entry-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    padding: var(--spacing-md) 0;
    margin-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--color-gray-light);
    font-size: var(--font-size-base);
    color: var(--color-text);
}

.single-post .entry-meta > span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    position: relative;
}

.single-post .entry-meta > span::after {
    content: '|';
    position: absolute;
    right: calc(var(--spacing-lg) / -2);
    color: var(--color-border);
}

.single-post .entry-meta > span:last-child::after {
    display: none;
}

.single-post .post-date {
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
}

.single-post .post-author {
    color: var(--color-heading);
    font-weight: var(--font-weight-medium);
}

.single-post .post-category a {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-primary);
    color: var(--color-white);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    transition: background-color var(--transition-fast);
}

.single-post .post-category a:hover {
    background-color: var(--color-primary-dark);
}

/* 文章标题 */
.single-post .entry-title {
    font-size: var(--font-size-xxxl);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-heading);
    color: var(--color-heading);
    margin-bottom: var(--spacing-md);
}

/* 文章摘要 */
.single-post .entry-excerpt {
    font-size: var(--font-size-md);
    line-height: var(--line-height-base);
    color: var(--color-text);
    padding: var(--spacing-lg);
    background-color: var(--color-gray-lightest);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--border-radius-sm);
    margin-bottom: var(--spacing-xl);
}

.single-post .entry-excerpt p:last-child {
    margin-bottom: 0;
}

/* ==========================================================================
   文章内容
   ========================================================================== */

.single-post .entry-content {
    font-size: var(--font-size-md);
    line-height: var(--line-height-base);
    color: var(--color-text);
    margin-bottom: var(--spacing-xl);
}

.single-post .entry-content h2 {
    font-size: var(--font-size-xxl);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 3px solid var(--color-primary);
}

.single-post .entry-content h3 {
    font-size: var(--font-size-xl);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.single-post .entry-content h4 {
    font-size: var(--font-size-lg);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.single-post .entry-content p {
    margin-bottom: var(--spacing-lg);
}

.single-post .entry-content ul,
.single-post .entry-content ol {
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-xl);
}

.single-post .entry-content li {
    margin-bottom: var(--spacing-sm);
}

.single-post .entry-content blockquote {
    position: relative;
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-lg) var(--spacing-xxl);
    background-color: var(--color-gray-lightest);
    border-left: 5px solid var(--color-secondary);
    border-radius: var(--border-radius-md);
    font-style: italic;
    color: var(--color-heading);
}

.single-post .entry-content blockquote::before {
    content: '"';
    position: absolute;
    left: var(--spacing-md);
    top: var(--spacing-md);
    font-size: 48px;
    color: var(--color-secondary);
    opacity: 0.3;
    font-family: Georgia, serif;
}

.single-post .entry-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    margin: var(--spacing-lg) 0;
    box-shadow: var(--shadow-sm);
}

.single-post .entry-content a {
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
    text-decoration: underline;
    transition: color var(--transition-fast);
}

.single-post .entry-content a:hover {
    color: var(--color-secondary);
}

/* 分页链接 */
.single-post .page-links {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: var(--color-gray-lightest);
    border-radius: var(--border-radius-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.single-post .page-links .page-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.single-post .page-links .page-number:hover,
.single-post .page-links .page-number.current {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

/* ==========================================================================
   文章底部
   ========================================================================== */

.single-post .entry-footer {
    padding: var(--spacing-lg) 0;
    border-top: 2px solid var(--color-gray-light);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

/* 文章标签 */
.single-post .post-tags {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.single-post .post-tags .tags-label {
    font-weight: var(--font-weight-semibold);
    color: var(--color-heading);
}

.single-post .post-tags a {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background-color: var(--color-gray-lightest);
    color: var(--color-text);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: all var(--transition-fast);
    border: 1px solid var(--color-border);
}

.single-post .post-tags a:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

/* 社交分享 */
.single-post .post-share {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.single-post .post-share .share-label {
    font-weight: var(--font-weight-semibold);
    color: var(--color-heading);
}

.single-post .post-share .share-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--color-gray-lightest);
    border-radius: 50%;
    color: var(--color-text);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.single-post .post-share .share-link:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
}

/* ==========================================================================
   文章导航（上一篇/下一篇）
   ========================================================================== */

.post-navigation {
    margin: var(--spacing-xxl) 0;
    padding: var(--spacing-xl) 0;
    border-top: 2px solid var(--color-gray-light);
    border-bottom: 2px solid var(--color-gray-light);
}

.post-navigation .nav-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.post-navigation .nav-previous,
.post-navigation .nav-next {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-lg);
    background-color: var(--color-gray-lightest);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-normal);
    text-decoration: none;
}

.post-navigation .nav-previous:hover,
.post-navigation .nav-next:hover {
    background-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.post-navigation .nav-next {
    text-align: right;
}

.post-navigation .nav-subtitle {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-gray);
    display: block;
}

.post-navigation .nav-previous:hover .nav-subtitle,
.post-navigation .nav-next:hover .nav-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.post-navigation .nav-title {
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    color: var(--color-heading);
    display: block;
}

.post-navigation .nav-previous:hover .nav-title,
.post-navigation .nav-next:hover .nav-title {
    color: var(--color-white);
}

/* ==========================================================================
   相关文章
   ========================================================================== */

.related-posts {
    margin: var(--spacing-xxl) 0;
    padding: var(--spacing-xl);
    background-color: var(--color-gray-lightest);
    border-radius: var(--border-radius-lg);
}

.related-posts .related-title {
    font-size: var(--font-size-xxl);
    font-weight: var(--font-weight-bold);
    color: var(--color-heading);
    margin-bottom: var(--spacing-xl);
    text-align: center;
    position: relative;
    padding-bottom: var(--spacing-md);
}

.related-posts .related-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: var(--border-radius-sm);
}

.related-posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.related-post {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.related-post:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.related-post-thumbnail {
    display: block;
    overflow: hidden;
}

.related-post-thumbnail img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.related-post:hover .related-post-thumbnail img {
    transform: scale(1.1);
}

.related-post-title {
    padding: var(--spacing-md) var(--spacing-lg) var(--spacing-xs);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-heading);
}

.related-post-title a {
    color: var(--color-heading);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.related-post-title a:hover {
    color: var(--color-primary);
}

.related-post-date {
    padding: 0 var(--spacing-lg) var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--color-gray);
}

/* ==========================================================================
   响应式设计
   ========================================================================== */

/* 平板设备 */
@media (max-width: 1024px) {
    .single-post .entry-title {
        font-size: var(--font-size-xxl);
    }
    
    .single-post .entry-content {
        font-size: var(--font-size-base);
    }
}

/* 移动设备 */
@media (max-width: 768px) {
    .single-post .entry-title {
        font-size: var(--font-size-xl);
    }
    
    .single-post .entry-meta {
        font-size: var(--font-size-sm);
        gap: var(--spacing-md);
    }
    
    .single-post .entry-content h2 {
        font-size: var(--font-size-xl);
    }
    
    .single-post .entry-content h3 {
        font-size: var(--font-size-lg);
    }
    
    .single-post .entry-footer {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .post-navigation .nav-links {
        grid-template-columns: 1fr;
    }
    
    .post-navigation .nav-next {
        text-align: left;
    }
    
    .related-posts {
        padding: var(--spacing-lg);
    }
    
    .related-posts-grid {
        grid-template-columns: 1fr;
    }
}

/* 小屏幕移动设备 */
@media (max-width: 480px) {
    .single-post .post-thumbnail img {
        max-height: 300px;
    }
    
    .single-post .entry-title {
        font-size: var(--font-size-lg);
    }
    
    .single-post .entry-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .single-post .entry-meta > span::after {
        display: none;
    }
    
    .single-post .entry-content {
        font-size: var(--font-size-sm);
    }
}