/* ============================================
   animate.css - 自有滚动动画（替代 AOS CDN）
   通过 IntersectionObserver 触发 .aos-animate
   ============================================ */

/* 基础状态 - 初始隐藏 */
[data-aos] {
  opacity: 0;
  transition-property: opacity, transform;
  transition-duration: 0.8s;
  transition-timing-function: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* 动画方向 */
[data-aos="fade-up"] {
  transform: translateY(40px);
}
[data-aos="fade-down"] {
  transform: translateY(-40px);
}
[data-aos="fade-left"] {
  transform: translateX(40px);
}
[data-aos="fade-right"] {
  transform: translateX(-40px);
}
[data-aos="zoom-in"] {
  transform: scale(0.92);
}
[data-aos="flip-up"] {
  transform: perspective(800px) rotateX(-30deg);
}

/* 触发后状态 */
[data-aos].aos-animate {
  opacity: 1;
  transform: translate(0) scale(1) rotate(0);
}

/* 延迟 */
[data-aos-delay="100"] { transition-delay: 0.1s; }
[data-aos-delay="200"] { transition-delay: 0.2s; }
[data-aos-delay="300"] { transition-delay: 0.3s; }
[data-aos-delay="400"] { transition-delay: 0.4s; }
[data-aos-delay="500"] { transition-delay: 0.5s; }
[data-aos-delay="600"] { transition-delay: 0.6s; }
[data-aos-delay="800"] { transition-delay: 0.8s; }

/* 持续时间 */
[data-aos-duration="400"] { transition-duration: 0.4s; }
[data-aos-duration="600"] { transition-duration: 0.6s; }
[data-aos-duration="1000"] { transition-duration: 1s; }
[data-aos-duration="1200"] { transition-duration: 1.2s; }

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  [data-aos] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}