/* Lightweight AOS (scroll fade-in). JS未実行時は表示される安全設計。 */
html.aos-on [data-aos]{
  opacity:0;
  transition-property:opacity, transform;
  transition-duration:.7s;
  transition-timing-function:cubic-bezier(.4,0,.2,1);
  will-change:opacity, transform;
}
html.aos-on [data-aos="fade-up"]    { transform:translateY(30px); }
html.aos-on [data-aos="fade-down"]  { transform:translateY(-30px); }
html.aos-on [data-aos="fade-left"]  { transform:translateX(30px); }
html.aos-on [data-aos="fade-right"] { transform:translateX(-30px); }
html.aos-on [data-aos="zoom-in"]    { transform:scale(.94); }
html.aos-on [data-aos].aos-animate  { opacity:1; transform:none; }