/**
 * Leary Theme - Scroll Animations & Utility
 */

/* 滚动进入动画 */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* 延迟动画（用于网格项目依次出现） */
.services-grid .service-item:nth-child(1) { transition-delay: 0.1s; }
.services-grid .service-item:nth-child(2) { transition-delay: 0.2s; }
.services-grid .service-item:nth-child(3) { transition-delay: 0.3s; }
.services-grid .service-item:nth-child(4) { transition-delay: 0.4s; }
.services-grid .service-item:nth-child(5) { transition-delay: 0.5s; }
.services-grid .service-item:nth-child(6) { transition-delay: 0.6s; }

.cases-grid .case-item:nth-child(1) { transition-delay: 0.1s; }
.cases-grid .case-item:nth-child(2) { transition-delay: 0.2s; }
.cases-grid .case-item:nth-child(3) { transition-delay: 0.3s; }
.cases-grid .case-item:nth-child(4) { transition-delay: 0.4s; }
.cases-grid .case-item:nth-child(5) { transition-delay: 0.5s; }
.cases-grid .case-item:nth-child(6) { transition-delay: 0.6s; }

.news-grid .news-card:nth-child(1) { transition-delay: 0.1s; }
.news-grid .news-card:nth-child(2) { transition-delay: 0.2s; }
.news-grid .news-card:nth-child(3) { transition-delay: 0.3s; }

/* Header 滚动效果 */
.header.scrolled {
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.12);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* 图片懒加载占位符 */
img[loading="lazy"] {
    background: linear-gradient(135deg, #f0f0f0 0%, #e0e0e0 100%);
}

/* 焦点可见性（无障碍） */
:focus-visible {
    outline: 2px solid #007cba;
    outline-offset: 2px;
}

/* 减少动画（无障碍偏好） */
@media (prefers-reduced-motion: reduce) {
    .animate-on-scroll {
        opacity: 1;
        transform: none;
        transition: none;
    }
    html {
        scroll-behavior: auto;
    }
}

/* 打印样式 */
@media print {
    .header,
    .slider,
    .nav-menu,
    .slider-nav,
    .hamburger {
        display: none !important;
    }
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
}