/* 懒加载图片样式 */

/* 加载中的图片样式 */
.lazy-loading {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading-shimmer 1.5s infinite;
    position: relative;
    overflow: hidden;
}

.lazy-loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: loading-shine 2s infinite;
}

/* 加载完成的图片样式 */
.lazy-loaded {
    transition: opacity 0.3s ease;
}

/* 加载失败的图片样式 */
.lazy-error {
    background-color: #f8f9fa;
    border: 2px dashed #dee2e6;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #6c757d;
    font-size: 0.875rem;
}

.lazy-error::before {
    content: '图片加载失败';
}

/* 动画效果 */
@keyframes loading-shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

@keyframes loading-shine {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

/* 响应式设计 */
@media (prefers-reduced-motion: reduce) {
    .lazy-loading {
        animation: none;
    }
    
    .lazy-loading::after {
        animation: none;
    }
    
    .lazy-loaded {
        transition: none;
    }
}

/* 深色主题支持 */
@media (prefers-color-scheme: dark) {
    .lazy-loading {
        background: linear-gradient(90deg, #2d2d2d 25%, #3d3d3d 50%, #2d2d2d 75%);
        background-size: 200% 100%;
    }
    
    .lazy-loading::after {
        background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    }
    
    .lazy-error {
        background-color: #2d2d2d;
        border-color: #4d4d4d;
        color: #a0a0a0;
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    .lazy-loading {
        background: #000;
        border: 1px solid #fff;
    }
    
    .lazy-error {
        background-color: #000;
        border: 2px solid #fff;
        color: #fff;
    }
}