/**
 * 图片延迟加载样式
 * Lazy Loading Images Styles
 */

.lazy-image {
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
    background-color: #f5f5f5;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 40 40'%3E%3Cg fill='%23e6e6e6'%3E%3Cpath d='M20 30a10 10 0 1 1 0-20 10 10 0 0 1 0 20zm0-2a8 8 0 1 0 0-16 8 8 0 0 0 0 16z'/%3E%3Cpath d='M20 25a5 5 0 1 1 0-10 5 5 0 0 1 0 10zm0-2a3 3 0 1 0 0-6 3 3 0 0 0 0 6z'/%3E%3C/g%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 40px 40px;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.lazy-image.loaded {
    opacity: 1;
    background-image: none;
}

.lazy-image.loading {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 40 40'%3E%3Cg fill='%23007cba'%3E%3Cpath d='M20 30a10 10 0 1 1 0-20 10 10 0 0 1 0 20zm0-2a8 8 0 1 0 0-16 8 8 0 0 0 0 16z' opacity='0.3'/%3E%3Cpath d='M20 30a10 10 0 0 1-10-10h2a8 8 0 0 0 8 8v2z'%3E%3CanimateTransform attributeName='transform' type='rotate' dur='1s' repeatCount='indefinite' values='0 20 20;360 20 20'/%3E%3C/path%3E%3C/g%3E%3C/svg%3E");
}

/* 确保延迟加载图片正确继承原有样式 */
.featured-image .lazy-image,
.card-image .lazy-image,
.slide-image .lazy-image,
.resource-image .lazy-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.featured-image .lazy-image {
    border-radius: 12px;
}

/* 卡片meta信息布局优化 */
.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 10px;
    font-size: 14px;
    color: #64748b;
}

.card-meta .category {
    background: #f1f5f9;
    color: #475569;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.card-meta .date {
    color: #94a3b8;
    font-size: 12px;
    margin-left: auto;
}

/* 确保精选教程部分的样式一致 */
.post-card .card-image {
    height: 200px;
    overflow: hidden;
    border-radius: 8px;
    margin-bottom: 15px;
}

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

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