/* ============================================
   滚动动画
   ============================================ */

/* 淡入上移 */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 淡入左移 */
.fade-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-left.visible {
    opacity: 1;
    transform: translateX(0);
}

/* 淡入右移 */
.fade-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* 缩放淡入 */
.scale-in {
    opacity: 0;
    transform: scale(0.9);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.scale-in.visible {
    opacity: 1;
    transform: scale(1);
}

/* 子元素逐个动画 */
.stagger-children > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0s; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 0.1s; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 0.2s; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 0.3s; }
.stagger-children.visible > *:nth-child(5) { transition-delay: 0.4s; }
.stagger-children.visible > *:nth-child(6) { transition-delay: 0.5s; }
.stagger-children.visible > *:nth-child(7) { transition-delay: 0.6s; }
.stagger-children.visible > *:nth-child(8) { transition-delay: 0.7s; }

.stagger-children.visible > * {
    opacity: 1;
    transform: translateY(0);
}

/* 数字递增动画占位 - 由 JS 驱动 */
.count-up {
    font-variant-numeric: tabular-nums;
}

/* 脉冲动画 */
@keyframes pulse-glow {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.pulse-glow {
    animation: pulse-glow 3s ease-in-out infinite;
}