/* 文章详情页样式 */
:root {
    --primary-color: #FF5200;
    --text-color: #1f2937;
    --text-secondary: #6b7280;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

.article-header {
    background: var(--card-bg);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.article-nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.article-main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
}

.article-content {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.article-meta h1 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.meta-info {
    display: flex;
    gap: 1rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.category {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.75rem;
}

.article-excerpt {
    background: var(--bg-color);
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 2rem;
    font-size: 1.05rem;
    color: var(--text-secondary);
}

.article-body {
    font-size: 1rem;
    line-height: 1.8;
}

.article-body h2 {
    font-size: 1.35rem;
    margin: 2rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-color);
}

.article-body h3 {
    font-size: 1.15rem;
    margin: 1.5rem 0 0.75rem;
}

.article-body p {
    margin-bottom: 1rem;
}

.article-footer {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.article-tags {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tag {
    background: var(--bg-color);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.article-cta {
    text-align: center;
}

.cta-button {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 2rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.2s;
}

.cta-button:hover {
    opacity: 0.9;
}

.article-sidebar {
    position: sticky;
    top: 5rem;
    height: fit-content;
}

.sidebar-section {
    background: var(--card-bg);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.sidebar-section h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.related-links {
    list-style: none;
}

.related-links li {
    margin-bottom: 0.75rem;
}

.related-links a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.875rem;
}

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

.sidebar-download-btn {
    display: block;
    background: var(--primary-color);
    color: white;
    text-align: center;
    padding: 0.75rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
}

.site-footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

@media (max-width: 768px) {
    .article-main {
        grid-template-columns: 1fr;
    }

    .article-sidebar {
        position: static;
    }

    .article-nav {
        padding: 1rem;
    }

    .nav-links {
        gap: 1rem;
        font-size: 0.875rem;
    }

    .article-content {
        padding: 1.5rem;
    }

    .article-meta h1 {
        font-size: 1.35rem;
    }
}