设置rem基准值

html {
  font-size: 1.02865px;
}

@media screen and (max-width: 767px) {
  html {
    font-size: 0.833333px;
  }
}

// 设置rem
const handleResize = () => {
  console.log("重置rem");
  const hw = document.documentElement.clientWidth || document.body.clientWidth;
  let htmlDom = document.getElementsByTagName("html")[0];
  // 手机移动端
  if (hw < 768) htmlDom.style.fontSize = hw / 450 + "px";
  else if (hw < 1700) htmlDom.style.fontSize = hw / 1000 + "px";
  else htmlDom.style.fontSize = hw / 1850 + "px"; // 1rem=1px
};
handleResize();
window.onresize = handleResize;