/* 
 * 学术资讯页面特定样式
 * 与网站整体风格保持一�?
 */

/* 资讯页面hero区域 */
.page-hero {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
    text-align: center;
}

.page-hero-content h1 {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
    color: white;
}

.page-hero-content p {
    font-size: 1.2rem;
    opacity: 0.9;
    color: white;
    max-width: 600px;
    margin: 0 auto;
}

/* 响应式样�?*/
@media (max-width: 768px) {
    .page-hero {
        padding: 7rem 0 3rem;
    }
    
    .page-hero-content h1 {
        font-size: 2rem;
    }
    
    .page-hero-content p {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .page-hero {
        padding: 6rem 0 2.5rem;
    }
    
    .page-hero-content h1 {
        font-size: 1.75rem;
    }
    
    .page-hero-content p {
        font-size: 0.875rem;
    }
}

/* 资讯筛选区�?*/
.news-filter {
    background-color: var(--color-bg-alt);
    padding: 2rem 0;
    border-bottom: 1px solid var(--color-border);
}

.news-filter-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.news-filter-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.category-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 30px;
    font-size: 0.9rem;
    color: var(--color-text);
    cursor: pointer;
    transition: var(--transition);
}

.category-tag:hover {
    background-color: var(--color-bg-alt);
}

.category-tag.active {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.news-search {
    position: relative;
    width: 100%;
    max-width: 300px;
}

.news-search input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 1px solid var(--color-border);
    border-radius: 30px;
    font-size: 0.9rem;
}

.news-search i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-light);
}

/* 资讯列表区域 */
.news-list {
    padding: 4rem 0;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
}

.news-card {
    overflow: hidden;
    border-top: 2px solid rgba(42, 74, 127, 0.4);
}

.news-card-image {
    height: 200px;
}

.news-card:hover .news-card-image img {
    transform: scale(1.05);
}

.news-card-content {
    padding: 1.5rem;
}

.news-card-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--color-bg-alt);
    border-radius: 30px;
    font-size: 0.8rem;
    color: var(--color-text);
    margin-bottom: 0.75rem;
}

.news-card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
    font-weight: 600;
    line-height: 1.4;
}

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

.news-card-title a:hover {
    color: var(--color-primary-light);
}

.news-card-excerpt {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    font-size: 0.875rem;
    line-height: 1.6;
}

.news-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.news-card-date {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.news-card-author {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* 特色资讯 */
.featured-news {
    margin-bottom: 4rem;
}

.featured-news-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    border-top: 2px solid rgba(42, 74, 127, 0.4);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.featured-news-image {
    height: 100%;
    min-height: 400px;
    position: relative;
    overflow: hidden;
}

.featured-news-image .img-placeholder {
    width: 100%;
    height: 100%;
}

.featured-news-image .img-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.featured-news-card:hover .featured-news-image .img-placeholder img {
    transform: scale(1.05);
}

.featured-news-content {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.featured-news-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--color-primary);
    color: var(--color-bg);
    border-radius: 30px;
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

.featured-news-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
    font-weight: 700;
    line-height: 1.3;
}

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

.featured-news-title a:hover {
    color: var(--color-primary-light);
}

.featured-news-excerpt {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    font-size: 1rem;
    line-height: 1.6;
}

.featured-news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
}

/* 分页导航 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
}

.pagination-item {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-size: 0.9rem;
    text-decoration: none;
    transition: var(--transition);
}

.pagination-item:hover {
    background-color: var(--color-bg-alt);
}

.pagination-item.active {
    background-color: var(--color-primary);
    color: var(--color-bg);
    border-color: var(--color-primary);
}

.pagination-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 资讯详情�?*/
.news-detail {
    padding: 8rem 0 4rem;
}

.news-detail-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.news-detail-main {
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    border-top: 2px solid rgba(42, 74, 127, 0.4);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.news-detail-image {
    height: 400px;
    background-color: #1a365d;
}

.news-detail-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-detail-content {
    padding: 2rem;
}

.news-detail-header {
    margin-bottom: 2rem;
}

.news-detail-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--color-bg-alt);
    border-radius: 30px;
    font-size: 0.9rem;
    color: var(--color-text);
    margin-bottom: 1rem;
}

.news-detail-title {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
    font-weight: 700;
    line-height: 1.3;
}

.news-detail-meta {
    display: flex;
    align-items: center;
    gap: 2rem;
    font-size: 0.95rem;
    color: var(--color-text-light);
}

.news-detail-date, .news-detail-author, .news-detail-views {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.news-detail-body {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-light);
}

.news-detail-body p {
    margin-bottom: var(--spacing-md);
}

.news-detail-body h2 {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    margin: var(--spacing-xl) 0 var(--spacing-md);
    color: var(--color-primary);
    font-weight: 600;
}

.news-detail-body h3 {
    font-size: 1.5rem;
    margin: 2rem 0 1rem;
    font-weight: 600;
}

.news-detail-body ul, .news-detail-body ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.news-detail-body li {
    margin-bottom: 0.5rem;
}

.news-detail-body blockquote {
    border-left: 4px solid var(--color-primary);
    padding-left: 1.5rem;
    font-style: italic;
    color: var(--color-text);
    margin: 1.5rem 0;
}

.news-detail-body img {
    max-width: 100%;
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
}

.news-detail-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-bg-alt);
}

.news-detail-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--color-bg-alt);
    border-radius: 30px;
    font-size: 0.9rem;
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition);
}

.news-detail-tag:hover {
    background-color: var(--color-bg-alt);
}

.news-detail-share {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-bg-alt);
}

.news-detail-share-text {
    font-weight: 600;
    color: var(--color-text);
}

.news-detail-share-links {
    display: flex;
    gap: 0.75rem;
}

.news-detail-share-link {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--color-bg-alt);
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition);
}

.news-detail-share-link:hover {
    background-color: var(--color-primary);
    color: var(--color-bg);
}

/* 侧边�?*/
.news-sidebar {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.sidebar-widget {
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    border-top: 2px solid rgba(42, 74, 127, 0.4);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    padding: 1.5rem;
}

.sidebar-widget-title {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    color: var(--color-primary);
    font-weight: 600;
    position: relative;
    padding-bottom: 0.75rem;
}

.sidebar-widget-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background-color: var(--color-primary);
}

.recent-posts-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.recent-post-item {
    display: flex;
    gap: 1rem;
}

.recent-post-image {
    width: 80px;
    height: 80px;
    border-radius: 4px;
    overflow: hidden;
    flex-shrink: 0;
    background-color: #1a365d;
}

.recent-post-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.recent-post-content {
    display: flex;
    flex-direction: column;
}

.recent-post-title {
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

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

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

.recent-post-date {
    font-size: 0.8rem;
    color: var(--color-text-light);
}

.categories-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.category-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--color-bg-alt);
}

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

.category-item a {
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.category-item a:hover {
    color: var(--color-primary);
}

.category-count {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    background-color: var(--color-bg-alt);
    border-radius: 30px;
    font-size: 0.8rem;
    color: var(--color-text);
}

.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag-item {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--color-bg-alt);
    border-radius: 30px;
    font-size: 0.85rem;
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition);
}

.tag-item:hover {
    background-color: var(--color-primary);
    color: var(--color-bg);
}

/* 响应式设�?*/
@media (max-width: 1200px) {
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .featured-news-card {
        grid-template-columns: 1fr;
    }
    
    .featured-news-image {
        height: 300px;
    }
    
    .news-detail-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .news-hero h1 {
        font-size: 2.5rem;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .news-filter-container {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .news-search {
        max-width: 100%;
    }
    
    .news-detail-title {
        font-size: 2rem;
    }
    
    .news-detail-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
}

/* 无动画模式支�?*/
@media (prefers-reduced-motion: reduce) {
    .news-card:hover {
        transform: none;
    }
    
    .news-card:hover .news-card-image img {
        transform: none;
    }
}

/* 搜索关键词高亮样式 */
.search-highlight {
    background-color: #fff3cd;
    color: #856404;
    padding: 0.1rem 0.2rem;
    border-radius: 3px;
    font-weight: 600;
    box-shadow: 0 0 0 1px rgba(255, 193, 7, 0.3);
}

.news-card-title .search-highlight {
    background-color: #ffeeba;
    color: #856404;
    font-weight: 700;
}

/* 搜索结果空状态 */
.search-empty {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--color-text-light);
}

.search-empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.search-empty-text {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.search-empty-subtext {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* 加载状态 */
.news-loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    color: var(--color-text-light);
}

.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    color: var(--color-text-light);
}

.loading-spinner .spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-border);
    border-top: 4px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

.loading-spinner p {
    margin: 0;
    font-size: 1rem;
    color: var(--color-text-light);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 多标签筛选样式 */
.multi-tag-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.multi-tag-item {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 30px;
    font-size: 0.9rem;
    color: var(--color-text);
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
}

.multi-tag-item:hover {
    background-color: var(--color-bg-alt);
}

.multi-tag-item.active {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.multi-tag-item input[type="checkbox"] {
    display: none;
}

.multi-tag-item label {
    cursor: pointer;
    margin: 0;
}

/* 移动端优化 */
@media (max-width: 768px) {
    .multi-tag-filter {
        justify-content: center;
    }
    
    .search-highlight {
        font-size: 0.9em;
        padding: 0.05rem 0.15rem;
    }
}