/* Block 1 from single.php */
/* 文章详情页布局 */
.single-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 48px;
    align-items: start;
}
.single-main {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-sm);
}
.single-sidebar { position: sticky; top: calc(var(--total-header) + 24px); }

/* 文章头部 */
.single-header { margin-bottom: 28px; }
.single-categories { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.single-title {
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 18px;
    color: var(--dark);
    letter-spacing: -0.3px;
}
.single-meta-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}
.single-meta-left {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
}
.single-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: .875rem;
    color: var(--text-light);
}

/* 特色图片 */
.single-featured-image {
    margin-bottom: 32px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--gray-100);
}
.single-featured-image img {
    width: 100%;
    height: auto;
    display: block;
}

/* 文章内容排版 */
.single-content {
    font-size: 1.0625rem;
    line-height: 1.9;
    color: var(--text);
}
.single-content h2,
.single-content h3,
.single-content h4 {
    margin-top: 36px;
    margin-bottom: 16px;
    color: var(--dark);
    font-weight: 700;
}
.single-content h2 { font-size: 1.5rem; }
.single-content h3 { font-size: 1.25rem; }
.single-content h4 { font-size: 1.125rem; }
.single-content p { margin-bottom: 20px; }
.single-content ul,
.single-content ol { margin-bottom: 20px; padding-left: 24px; }
.single-content ul { list-style: disc; }
.single-content ol { list-style: decimal; }
.single-content li { margin-bottom: 8px; }
.single-content blockquote {
    margin: 28px 0;
    padding: 20px 24px;
    border-left: 4px solid var(--primary);
    background: var(--primary-light);
    border-radius: 0 var(--radius) var(--radius) 0;
    font-style: italic;
    color: var(--gray-700);
}
.single-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
    margin: 20px 0;
}
.single-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.single-content a:hover { color: var(--primary-hover); }
.single-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: .9375rem;
}
.single-content th,
.single-content td {
    padding: 10px 14px;
    border: 1px solid var(--border);
    text-align: left;
}
.single-content th { background: var(--gray-50); font-weight: 600; }

/* 表格响应式：小屏幕横向滚动 */
@media (max-width: 768px) {
    .single-content table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
    }
}

/* 标签 */
.single-tags {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-top: 36px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.single-tags-label {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: .9375rem;
    font-weight: 600;
    color: var(--dark);
}

/* 分享按钮 */
.single-share {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.single-share-label {
    font-size: .9375rem;
    font-weight: 600;
    color: var(--dark);
    margin-right: 4px;
}
.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--gray-100);
    color: var(--gray-600);
    transition: var(--transition);
    border: none;
    cursor: pointer;
}
.share-btn:hover { transform: translateY(-2px); color: #fff; }
.share-facebook:hover { background: #1877f2; }
.share-twitter:hover { background: #1da1f2; }
.share-linkedin:hover { background: #0077b5; }
.share-whatsapp:hover { background: #25d366; }
.share-copy:hover { background: var(--primary); }

/* 上一篇/下一篇 */
.single-post-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 36px;
    padding-top: 28px;
    border-top: 1px solid var(--border);
}
.post-nav-prev,
.post-nav-next { display: flex; flex-direction: column; gap: 6px; }
.post-nav-next { text-align: right; align-items: flex-end; }
.post-nav-label {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: .8125rem;
    color: var(--text-light);
    font-weight: 500;
}
.post-nav-title {
    font-size: .9375rem;
    font-weight: 600;
    color: var(--dark);
    line-height: 1.4;
    text-decoration: none;
}
.post-nav-title:hover { color: var(--primary); }

/* 作者信息 */
.author-box {
    display: flex;
    align-items: center;
    gap: 14px;
}
.author-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}
.author-info strong {
    display: block;
    font-size: .9375rem;
    color: var(--dark);
    margin-bottom: 4px;
}
.author-info p {
    font-size: .8125rem;
    color: var(--text-light);
    line-height: 1.5;
    margin: 0;
}

/* 侧边栏文章列表复用 */
.sidebar-post-list { display: flex; flex-direction: column; gap: 12px; }
.sidebar-post-link {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
    padding: 6px;
    border-radius: var(--radius-sm);
}
.sidebar-post-link:hover { background: var(--gray-50); }
.sidebar-post-link:hover .sidebar-post-title { color: var(--primary); }
.sidebar-post-thumb {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    flex-shrink: 0;
    background: var(--gray-100);
}
.sidebar-post-thumb img { width: 100%; height: 100%; object-fit: cover; }
.sidebar-post-info { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 3px; }
.sidebar-post-title {
    font-size: .875rem;
    font-weight: 600;
    color: var(--dark);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.sidebar-post-date { font-size: .75rem; color: var(--text-light); }

/* FAQ 常见问题样式 */
.single-faq {
    margin-top: 36px;
    padding-top: 28px;
    border-top: 1px solid var(--border);
}
.single-faq .section-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 20px;
}
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.faq-item-card {
    background: #fff;
    border: 1px solid var(--border, #e5e7eb);
    border-radius: 12px;
    padding: 20px;
    transition: box-shadow 0.2s;
}
.faq-item-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.faq-question {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border, #e5e7eb);
}
.faq-question h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark, #1f2937);
    margin: 0;
    line-height: 1.5;
}
.faq-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.875rem;
    flex-shrink: 0;
}
.faq-question .faq-icon {
    background: var(--primary-light, #eff6ff);
    color: var(--primary, #2563eb);
}
.faq-answer {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}
.answer-icon {
    background: #f0fdf4;
    color: #16a34a;
}
.faq-answer-content {
    color: var(--text, #374151);
    font-size: 0.9375rem;
    line-height: 1.7;
}
.faq-answer-content p {
    margin: 0 0 8px 0;
}
.faq-answer-content p:last-child {
    margin-bottom: 0;
}

/* 响应式 */
@media (max-width: 1024px) {
    .single-layout { grid-template-columns: 1fr; gap: 32px; }
    .single-sidebar { position: static; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .single-main { padding: 28px; }
}
@media (max-width: 768px) {
    .single-main { padding: 24px; }
    .single-sidebar { grid-template-columns: 1fr; }
    .single-post-nav { grid-template-columns: 1fr; gap: 16px; }
    .post-nav-next { text-align: left; align-items: flex-start; }
    .single-content { font-size: 1rem; }
    .single-meta-bar { flex-direction: column; align-items: flex-start; }
}