/* 图片加载状态样式 */

/* 分类文章轮播图片 */
.category-post-image {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.category-post-image.loaded {
    opacity: 1;
}

/* 首页横幅图片 */
.certificate-item img,
.hero-logo {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.certificate-item img.loaded,
.hero-logo.loaded {
    opacity: 1;
}

/* 确保图片容器有固定高度，防止布局跳动 */
.category-post-image-wrapper {
    background-color: #f5f5f5;
}

/* 可选：添加加载动画 */
.category-post-image-wrapper::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 30px;
    height: 30px;
    margin: -15px 0 0 -15px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #2563eb;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 图片加载完成后隐藏加载动画 */
.category-post-image.loaded ~ .category-post-image-wrapper::before {
    display: none;
}