/* ========== Animations ========== */
/* 关键帧动画、滚动揭示、导航下划线动画、减弱动画偏好 */

/* ========== Keyframe Animations ========== */
@keyframes heroFadeIn {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes indBorderDraw {
  from { stroke-dashoffset: 157; }
  to   { stroke-dashoffset: 0; }
}
@keyframes indProgress {
  from { width: 0; }
  to   { width: 100%; }
}

/* ========== Scroll Reveal Animations ========== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}
.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}
.reveal-scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* stagger delays */
.stagger-1 { transition-delay: 0.08s; }
.stagger-2 { transition-delay: 0.16s; }
.stagger-3 { transition-delay: 0.24s; }
.stagger-4 { transition-delay: 0.32s; }

/* ========== Reduced Motion ========== */
@media (prefers-reduced-motion: reduce) {
  .reveal, .reveal-left, .reveal-right, .reveal-scale {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .hero-title, .hero-subtitle, .hero-cta {
    opacity: 1;
    transform: none;
    animation: none;
  }
  .hero-bg { transform: none; animation: none; }
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}