/* ============================================
   滚动动画 + 关键帧
   ============================================ */

/* --- 滚动揭示（初始状态） --- */
[data-animate] {
  opacity: 0;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate="fade-up"] { transform: translateY(30px); }
[data-animate="fade-down"] { transform: translateY(-30px); }
[data-animate="fade-left"] { transform: translateX(-30px); }
[data-animate="fade-right"] { transform: translateX(30px); }
[data-animate="scale-in"] { transform: scale(0.92); }
[data-animate="fade-in"] { transform: none; }

/* 可见状态 */
[data-animate].is-visible {
  opacity: 1;
  transform: translate(0, 0) scale(1);
}

/* 延迟 */
[data-delay="100"].is-visible { transition-delay: 0.1s; }
[data-delay="200"].is-visible { transition-delay: 0.2s; }
[data-delay="300"].is-visible { transition-delay: 0.3s; }
[data-delay="400"].is-visible { transition-delay: 0.4s; }
[data-delay="500"].is-visible { transition-delay: 0.5s; }

/* --- 脉冲光晕 --- */
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(26, 86, 219, 0.1); }
  50% { box-shadow: 0 0 40px rgba(26, 86, 219, 0.2); }
}

/* --- 渐显 --- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- 偏好减少动画 --- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  [data-animate] {
    opacity: 1;
    transform: none;
  }
}