/**
 * 子比主题卡片缩略图优化样式
 */

/* 基础缩略图容器样式 */
.posts-grid .item-thumbnail,
.posts-list .item-thumbnail,
.post-list .item-thumbnail,
.widget-post .item-thumbnail,
.related-posts .item-thumbnail,
.zib-widget-thumb,
.post-thumbnail,
.item-img,
.post-card-thumb {
    position: relative;
    overflow: hidden;
    background: #f5f5f5;
    border-radius: 8px;
}

/* 缩略图图片样式 */
.posts-grid .item-thumbnail img,
.posts-list .item-thumbnail img,
.post-list .item-thumbnail img,
.widget-post .item-thumbnail img,
.related-posts .item-thumbnail img,
.zib-widget-thumb img,
.post-thumbnail img,
.item-img img,
.post-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease, object-fit 0.3s ease;
}

/* 悬停效果 */
.posts-grid .item-thumbnail:hover img,
.posts-list .item-thumbnail:hover img,
.post-list .item-thumbnail:hover img,
.widget-post .item-thumbnail:hover img,
.related-posts .item-thumbnail:hover img,
.zib-widget-thumb:hover img,
.post-thumbnail:hover img,
.item-img:hover img,
.post-card-thumb:hover img {
    transform: scale(1.05);
}

/* 子比主题特定选择器 */
.item-box .item-thumbnail,
.item-infor .item-thumbnail,
.article-post-thumbnail,
.posts-item-box .posts-item-img {
    position: relative;
    overflow: hidden;
    background: #f5f5f5;
    border-radius: 8px;
}

.item-box .item-thumbnail img,
.item-infor .item-thumbnail img,
.article-post-thumbnail img,
.posts-item-box .posts-item-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease, object-fit 0.3s ease;
}

.item-box .item-thumbnail:hover img,
.item-infor .item-thumbnail:hover img,
.article-post-thumbnail:hover img,
.posts-item-box .posts-item-img:hover img {
    transform: scale(1.05);
}

/* 加载动画 */
.posts-grid .item-thumbnail.loading::before,
.posts-list .item-thumbnail.loading::before,
.post-list .item-thumbnail.loading::before,
.widget-post .item-thumbnail.loading::before,
.related-posts .item-thumbnail.loading::before,
.zib-widget-thumb.loading::before,
.post-thumbnail.loading::before,
.item-img.loading::before,
.post-card-thumb.loading::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    margin: -20px 0 0 -20px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.item-box .item-thumbnail.loading::before,
.item-infor .item-thumbnail.loading::before,
.article-post-thumbnail.loading::before,
.posts-item-box .posts-item-img.loading::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    margin: -20px 0 0 -20px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .posts-grid .item-thumbnail,
    .posts-list .item-thumbnail,
    .post-list .item-thumbnail,
    .widget-post .item-thumbnail,
    .related-posts .item-thumbnail,
    .zib-widget-thumb,
    .post-thumbnail,
    .item-img,
    .post-card-thumb,
    .item-box .item-thumbnail,
    .item-infor .item-thumbnail,
    .article-post-thumbnail,
    .posts-item-box .posts-item-img {
        border-radius: 6px;
    }
}

@media (max-width: 480px) {
    .posts-grid .item-thumbnail,
    .posts-list .item-thumbnail,
    .post-list .item-thumbnail,
    .widget-post .item-thumbnail,
    .related-posts .item-thumbnail,
    .zib-widget-thumb,
    .post-thumbnail,
    .item-img,
    .post-card-thumb,
    .item-box .item-thumbnail,
    .item-infor .item-thumbnail,
    .article-post-thumbnail,
    .posts-item-box .posts-item-img {
        border-radius: 4px;
    }
}