/* 速度优化CSS - 仅关键优化 */
img { content-visibility: auto; }
img[loading="lazy"] { opacity: 0; transition: opacity 0.3s; }
img[loading="lazy"].loaded { opacity: 1; }
.service-card, .case-card, .stat-item { transform: translateZ(0); }
.navbar, .main-header { transform: translateZ(0); }
.slide-bg { image-rendering: -webkit-optimize-contrast; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; } }