:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --text-color: #333;
    --light-gray: #f5f7fa;
    --border-color: #e1e4e8;
    --card-shadow: 0 4px 6px rgba(0,0,0,0.05);
    --transition: all 0.3s ease;
}



.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}



h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.page-description {
    font-size: 1.2rem;
    color: #666;
    max-width: 800px;
}


.section-header {
    display: flex;
    align-items: center;
    margin: 2rem 0 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.section-header h2 {
    font-size: 1.8rem;
    color: var(--text-color);
}

.section-icon {
    margin-right: 0.8rem;
    color: var(--primary-color);
}

/* 子目录卡片样式 */
.sections-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.8rem;
    margin-bottom: 3rem;
}

.section-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.section-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.08);
    border-color: var(--primary-color);
}

.section-card-header {
    padding: 1.5rem;
    background: var(--light-gray);
    border-bottom: 1px solid var(--border-color);
}

.section-card-header h3 {
    font-size: 1.3rem;
    margin: 0 0 0.5rem;
    display: flex;
    align-items: center;
}

.section-card-header h3 a {
    color: var(--text-color);
    text-decoration: none;
}

.folder-icon {
    margin-right: 0.7rem;
    color: var(--primary-color);
}

.section-description {
    color: #555;
    font-size: 0.95rem;
    margin: 0.5rem 0 0;
    line-height: 1.5;
}

.section-card-content {
    padding: 1.5rem;
    flex-grow: 1;
}

.section-preview {
    list-style: none;
    padding: 0;
    margin: 0;
}

.section-preview li {
    margin-bottom: 0.8rem;
    padding-bottom: 0.8rem;
    border-bottom: 1px dashed #eee;
    display: flex;
    align-items: flex-start;
}

.section-preview li:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.file-icon {
    margin-right: 0.7rem;
    color: var(--secondary-color);
    flex-shrink: 0;
    margin-top: 0.2rem;
}

.preview-title {
    font-size: 0.95rem;
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

.preview-title:hover {
    color: var(--primary-color);
}

.view-all-link {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background: var(--light-gray);
    border-radius: 4px;
    text-decoration: none;
    color: var(--primary-color);
    font-size: 0.9rem;
    transition: var(--transition);
}

.view-all-link:hover {
    background: var(--primary-color);
    color: white;
}

/* 文章列表样式 */
.articles-container {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    border: 1px solid var(--border-color);
}


.article-item {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.article-item:hover {
    background-color: #f8fafd;
}

.article-item:last-child {
    border-bottom: none;
}

.article-title {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
}

.article-title a {
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

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

.article-meta {
    display: flex;
    align-items: center;
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 0.8rem;
}

.article-date {
    display: flex;
    align-items: center;
    margin-right: 1.5rem;
}

.article-categories {
    display: flex;
    align-items: center;
}

.meta-icon {
    margin-right: 0.5rem;
    opacity: 0.7;
}

.article-excerpt {
    color: #555;
    font-size: 0.95rem;
    line-height: 1.6;
}

/* 空状态提示 */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: #777;
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .sections-container {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 1.5rem 1rem;
    }
    
    h1 {
        font-size: 2rem;
    }
}

.breadcrumb {
    display: flex;
    align-items: center;
    margin: 1.5rem 0;
    font-size: 0.95rem;
    color: #666;
}

.breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.breadcrumb span {
    margin: 0 0.5rem;
    color: #999;
}