/* ====== 知识库页面独有CSS部分 ====== */
/* 页面头部区域 */
.page-header {
    padding: 180px 0 100px;
    background: linear-gradient(135deg, rgba(248, 250, 252, 0.95) 0%, rgba(230, 240, 255, 0.95) 100%), url('/template/giaxi/images/9.jpg');
    background-size: cover;
    background-position: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header h1 {
    font-size: 4.5rem;
    margin-bottom: 25px;
}

.page-header p {
    font-size: 1.5rem;
    max-width: 800px;
    margin: 0 auto 40px;
    color: var(--gray-color);
}

/* 知识库筛选器 */
.knowledge-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 60px;
    padding: 30px;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    border: 1px solid rgba(0, 102, 204, 0.1);
}

.filter-btn {
    padding: 12px 28px;
    background: transparent;
    border: 2px solid rgba(0, 102, 204, 0.2);
    border-radius: 50px;
    font-weight: 600;
    color: var(--dark-color);
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 102, 204, 0.15);
}

/* 知识库文章列表 - 缩略图在左侧布局 */
.knowledge-list {
    display: flex;
    flex-direction: column;
    gap: 40px;
    margin-bottom: 80px;
}

/* 文章卡片 - 左右布局 */
.knowledge-item {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border: 1px solid rgba(0, 102, 204, 0.1);
    position: relative;
    display: flex;
    min-height: 300px;
}

.knowledge-item:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.6s cubic-bezier(0.19, 1, 0.22, 1);
}

.knowledge-item:hover:before {
    transform: scaleX(1);
}

.knowledge-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 25px 60px rgba(0, 102, 204, 0.12);
    border-color: rgba(0, 102, 204, 0.2);
}

/* 文章缩略图 - 左侧布局 */
.article-thumbnail {
    position: relative;
    width: 40%;
    min-width: 300px;
    overflow: hidden;
    flex-shrink: 0;
}

.article-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 1s cubic-bezier(0.19, 1, 0.22, 1);
}

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

/* 分类标签定位在缩略图上 */
.category-tag {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 2;
    display: inline-block;
    padding: 8px 20px;
    background: rgba(0, 102, 204, 0.9);
    color: white;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.knowledge-item:hover .category-tag {
    background: var(--gradient-primary);
    transform: translateY(-3px);
}

/* 文章内容区域 - 右侧布局 */
.article-content {
    padding: 40px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.knowledge-item h3 {
    margin-bottom: 20px;
    font-size: 1.8rem;
    line-height: 1.3;
}

/* H3链接无下划线特效 */
.knowledge-item h3 a {
    color: var(--dark-color);
    position: relative;
    display: inline-block;
    text-decoration: none !important;
}

.knowledge-item h3 a:after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
    transition: var(--transition);
}

.knowledge-item h3 a:hover {
    color: var(--primary-color);
}

.knowledge-item h3 a:hover:after {
    width: 100%;
}

.knowledge-excerpt {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--gray-color);
    margin-bottom: 25px;
    flex: 1;
}

.knowledge-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 30px;
    padding-top: 25px;
    border-top: 1px solid rgba(0, 102, 204, 0.05);
}

.meta-left {
    display: flex;
    gap: 25px;
    color: var(--gray-color);
    font-size: 0.95rem;
}

.meta-left span {
    display: flex;
    align-items: center;
    gap: 8px;
}

.meta-left i {
    color: var(--secondary-color);
    font-size: 1rem;
}

.read-more {
    color: var(--primary-color);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.read-more:hover {
    color: var(--secondary-color);
    gap: 12px;
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 80px;
    flex-wrap: wrap;
}

.page-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 55px;
    height: 55px;
    border-radius: 12px;
    font-weight: 700;
    color: var(--dark-color);
    background: white;
    border: 2px solid rgba(0, 102, 204, 0.1);
    transition: var(--transition);
    font-size: 1.1rem;
}

.page-num:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    color: var(--primary-color);
    box-shadow: 0 10px 25px rgba(0, 102, 204, 0.1);
}

.page-num.page-num-current {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 10px 25px rgba(0, 102, 204, 0.2);
}

.page-num i {
    font-size: 1rem;
}

/* 知识库页面独享响应式调整 */
@media (max-width: 1100px) {
    .article-thumbnail {
        width: 35%;
        min-width: 250px;
    }
}

@media (max-width: 992px) {
    .page-header {
        padding: 150px 0 80px;
    }
    
    .page-header h1 {
        font-size: 3.5rem;
    }
    
    .knowledge-item {
        flex-direction: column;
        min-height: auto;
    }
    
    .article-thumbnail {
        width: 100%;
        min-width: 100%;
        height: 300px;
    }
    
    .article-content {
        padding: 35px;
    }
    
    .knowledge-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .page-header h1 {
        font-size: 2.8rem;
    }
    
    .page-header p {
        font-size: 1.3rem;
    }
    
    .article-content {
        padding: 30px 25px;
    }
    
    .article-thumbnail {
        height: 250px;
    }
    
    .knowledge-item h3 {
        font-size: 1.6rem;
    }
    
    .knowledge-excerpt {
        font-size: 1.1rem;
    }
    
    .pagination {
        gap: 8px;
    }
    
    .page-num {
        width: 48px;
        height: 48px;
        font-size: 1rem;
    }
    
    .filter-btn {
        padding: 10px 22px;
        font-size: 0.95rem;
    }
    
    .category-tag {
        top: 15px;
        left: 15px;
        padding: 6px 16px;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .page-header h1 {
        font-size: 2.5rem;
    }
    
    .meta-left {
        flex-direction: column;
        gap: 10px;
    }
    
    .knowledge-filter {
        padding: 25px 20px;
    }
    
    .article-thumbnail {
        height: 200px;
    }
    
    .knowledge-item h3 {
        font-size: 1.4rem;
    }
    
    .knowledge-excerpt {
        font-size: 1rem;
    }
}