/* 图片懒加载样式 */
img.lazy,
img[loading="lazy"],
img[data-src] {
    opacity: 0;
    transition: opacity 0.3s ease-in-out, transform 0.3s ease-out;
    background-color: #f5f5f5;
    will-change: opacity, transform;
    backface-visibility: hidden;
}

img.lazy.loaded,
img[loading="lazy"].loaded,
img[data-src].loaded,
img:has([src]):not([src=""]) {
    opacity: 1;
    transform: scale(1);
}

/* 图片占位符动画 */
.img-placeholder {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* 响应式图片容器 */
.img-container {
    position: relative;
    overflow: hidden;
    background-color: #f8f8f8;
    border-radius: 8px;
}

.img-container img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

/* 图片加载错误时显示图标 */
img::before {
    content: '图片加载失败';
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 12px;
}

/* 图片渐进式加载 */
.progressive-img {
    filter: blur(8px);
    transition: filter 0.5s ease-out;
}

.progressive-img.loaded {
    filter: blur(0);
}

/* iOS Safari 图片渲染优化 */
img {
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    -webkit-perspective: 1000;
    perspective: 1000;
}

/* 禁用图片拖拽 */
img {
    -webkit-user-drag: none;
    user-select: none;
    pointer-events: none;
}

/* 图片容器悬停效果 */
.img-container:hover img {
    transform: scale(1.02);
}

/* 图片圆角 */
img.rounded {
    border-radius: 8px;
}

/* 图片阴影 */
img.shadow {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}