/* 性能优化相关的CSS */

/* 图片懒加载样式 */
.lazy-image {
    opacity: 0;
    transition: opacity 0.3s;
}

.lazy-image.loaded {
    opacity: 1;
}

/* 加载占位符 */
.loading-placeholder {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

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

/* 优化字体加载 - 字体定义已移除 */

/* 减少重绘和回流 */
.optimized-container {
    will-change: transform;
    transform: translateZ(0);
}

/* 优化动画性能 */
.smooth-animation {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* 响应式图片 */
.responsive-image {
    max-width: 100%;
    height: auto;
    object-fit: cover;
}

/* 优化表格性能 */
.optimized-table {
    table-layout: fixed;
    width: 100%;
}

/* 减少CSS选择器复杂度 */
.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
    color: #fff;
    padding: 0.375rem 0.75rem;
    border-radius: 0.25rem;
    transition: all 0.15s ease-in-out;
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #004085;
}

/* 优化滚动性能 */
.smooth-scroll {
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

/* 预加载关键资源 - 图片引用已移除 */