/* ====== KNOWLEDGE BASE PAGE EXCLUSIVE STYLES ====== */
/* Page Header */
.page-header {
    background: var(--gradient-light);
    padding: 4rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('/template/giaxi/images/13.jpg') center/cover no-repeat;
    opacity: 0.05;
}

.page-header-content {
    position: relative;
    z-index: 2;
}

.page-header h1 {
    margin-bottom: 1rem;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1.5rem;
    color: var(--dark-secondary);
    font-size: 0.95rem;
}

.breadcrumb a {
    color: var(--primary);
    font-weight: 500;
}

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

.breadcrumb .separator {
    color: var(--gray);
}

/* Knowledge Categories */
.knowledge-categories {
    background: var(--light);
    padding: 2rem 0;
    border-bottom: 1px solid var(--gray-light);
}

.categories-container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.category-btn {
    padding: 0.75rem 1.5rem;
    background: white;
    border: 1px solid var(--gray-light);
    border-radius: var(--radius);
    font-weight: 600;
    color: var(--dark);
    transition: var(--transition);
    cursor: pointer;
}

.category-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

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

/* Knowledge List - 重新设计，带缩略图 */
.knowledge-list-section {
    background: var(--light-bg);
}

.knowledge-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.knowledge-item {
    background: white;
    border-radius: var(--radius-lg);
    padding: 0;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--gray-light);
    display: grid;
    grid-template-columns: 300px 1fr;
    overflow: hidden;
}

.knowledge-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.knowledge-thumbnail {
    height: 100%;
    min-height: 220px;
    overflow: hidden;
    position: relative;
}

.knowledge-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.knowledge-item:hover .knowledge-thumbnail img {
    transform: scale(1.05);
}

.knowledge-content {
    padding: 2rem;
}

.knowledge-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.knowledge-category-badge {
    display: inline-block;
    background: rgba(0, 102, 204, 0.1);
    color: var(--primary);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.knowledge-date {
    color: var(--gray);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

.knowledge-item h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    /* 去掉链接下划线 */
    text-decoration: none !important;
}

.knowledge-item h3 a {
    text-decoration: none !important;
    color: var(--dark);
    transition: var(--transition);
    display: block;
}

.knowledge-item h3 a:hover {
    color: var(--primary);
    /* 确保悬停时没有下划线 */
    text-decoration: none !important;
}

.knowledge-item p {
    color: var(--dark-secondary);
    margin-bottom: 1.5rem;
}

.knowledge-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--gray-light);
}

.knowledge-time {
    color: var(--gray);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.page-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    border-radius: var(--radius);
    background: white;
    color: var(--dark);
    font-weight: 600;
    border: 1px solid var(--gray-light);
    transition: var(--transition);
}

.page-num:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.page-num-current {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary);
}

.page-num i {
    font-size: 0.875rem;
}

/* Featured Article */
.featured-article {
    background: var(--light);
    padding-bottom: 2rem;
}

.featured-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    border: 1px solid var(--gray-light);
}

.featured-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.featured-image {
    height: 300px;
    overflow: hidden;
}

.featured-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.featured-content {
    padding: 2rem;
}

.featured-badge {
    display: inline-block;
    background: var(--accent);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.featured-content h2 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.featured-content h2 a {
    text-decoration: none !important;
    color: var(--dark);
    transition: var(--transition);
}

.featured-content h2 a:hover {
    color: var(--primary);
    text-decoration: none !important;
}

/* Newsletter Subscription - 放在页脚上方 */
.newsletter-section {
    background: var(--gradient-primary);
    color: white;
    text-align: center;
    padding: 3rem 2rem;
    border-radius: var(--radius-lg);
    margin-top: 2rem;
}

.newsletter-section h3 {
    color: white;
    margin-bottom: 1rem;
}

.newsletter-form {
    display: flex;
    gap: 0.5rem;
    margin-top: 1.5rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.newsletter-input {
    flex: 1;
    padding: 0.875rem 1rem;
    border-radius: var(--radius);
    border: none;
    font-family: inherit;
    font-size: 1rem;
}

/* Filter Tags - 放在分类按钮下方 */
.filter-tags-section {
    background: white;
    padding: 1.5rem 0;
}

.filter-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
}

.filter-tag {
    padding: 0.5rem 0.75rem;
    background: rgba(0, 102, 204, 0.1);
    color: var(--primary);
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
}

.filter-tag:hover {
    background: rgba(0, 102, 204, 0.2);
}

.filter-tag.active {
    background: var(--gradient-primary);
    color: white;
}

/* Knowledge Base Page Specific Responsive */
@media (max-width: 768px) {
    .knowledge-item {
        grid-template-columns: 1fr;
    }
    
    .knowledge-thumbnail {
        height: 200px;
    }
}

@media (max-width: 1024px) {
    .knowledge-thumbnail {
        min-height: 200px;
    }
}

@media (max-width: 768px) {
    .knowledge-item-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
}

@media (max-width: 576px) {
    .knowledge-content {
        padding: 1.5rem;
    }
}