/* 苹果原生全局字体 */
html, body,
h1, h2, h3, h4, h5, h6,
button, p, span, a, div {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", sans-serif !important;
}
/* 全屏背景轮播 - 不影响页面任何内容 */
#bg-slider {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1; /* 放在最底层 */
  background: #000;
  overflow: hidden;
}

#bg-slider img {
  position: absolute;
  width: 100%;
  height: 100%;
  object-fit: cover; /* 铺满屏幕不变形 */
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
}

#bg-slider img.active {
  opacity: 1;
}