/* ========================================
   动画与滚动揭示效果
   ======================================== */

/* === 渐显动画 === */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s ease forwards;
}
.fade-up.delay-1 { animation-delay: 0.2s; }
.fade-up.delay-2 { animation-delay: 0.4s; }
.fade-up.delay-3 { animation-delay: 0.6s; }
.fade-up.delay-4 { animation-delay: 0.8s; }

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* === 滚动渐显 === */
.reveal-element {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal-element.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* === 错开动画 === */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }
.stagger-6 { transition-delay: 0.6s; }
.stagger-7 { transition-delay: 0.7s; }
.stagger-8 { transition-delay: 0.8s; }

/* 所有产品卡片和分类卡片也支持reveal */
.products-grid .product-card,
.categories-grid .category-card,
.culture-grid .culture-card,
.affair-item,
.stat-item {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.products-grid .product-card.revealed,
.categories-grid .category-card.revealed,
.culture-grid .culture-card.revealed,
.affair-item.revealed,
.stat-item.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* === 数字跳动 === */
@keyframes countUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.counter.animated { animation: countUp 0.6s ease forwards; }

/* === 悬浮动画 === */
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* === 脉冲 === */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* === 平滑页面过渡 === */
main {
    animation: pageIn 0.5s ease;
}
@keyframes pageIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}