二话不说，上样式~

/*== reset start ==*/
body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,fieldset,input,textarea,p,blockquote,th,tr,td,section,a,input,span {
  margin: 0;
  padding: 0;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}

html,body {
  padding: 0;
  margin: 0;
  /*
  -webkit-user-select: none;
  user-select: none;
  */
  -webkit-overflow-scrolling: touch;
  overflow-scrolling: touch;
}

html,body,form,fieldset,p,div,h1,h2,h3,h4,h5,h6,section,article {
  -webkit-text-size-adjust: none;
}

body {
  font-family: "Helvetica Neue", Helvetica, STHeiTi, sans-serif,"microsoft yahei";
  // 移动端用此行样式，修正文字 line-height 不居中的问题
  // font-family: -apple-system-font,PingFangSC,Microsoft Yahei,Heiti SC,miui,sans-serif,arial,helvetica;
  word-break: break-all;
}

article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section {
  display: block;
}

table {
  border-collapse: collapse;
  border-spacing: 0;
}

fieldset,img {
  border: 0;
}

address,caption,cite,code,dfn,em,strong,th,var {
  font-style: normal;
  font-weight: normal;
}

ol,ul {
  list-style: none;
}

caption,th,td {
  text-align: center;
}

h1,h2,h3,h4,h5,h6 {
  font-size: 100%;
  font-weight: normal;
}

q:before,q:after {
  content: '';
}

input[type=button],button {
  -webkit-appearance: none;
  -webkit-user-select: none;
}

a,img,input,select,li {
  -webkit-tap-highlight-color: rgba(0,0,0,0);
}

a,img {
  text-decoration: none;
  -webkit-tap-highlight-color: rgba(0,0,0,0);
  -webkit-touch-callout: none;
}

a,input,img,select {
  outline: none;
}

input::-webkit-clear-button,input::-webkit-inner-spin-button,input::-webkit-outer-spin-button {
  -webkit-appearance: none;
}

input::-webkit-search-cancel-button {
  display: none;
}

input:focus::-webkit-input-placeholder {
  opacity: 0;
}

/*
::-webkit-scrollbar {
  display: none;
}
*/

img {
  -webkit-touch-callou: none;
}

* {
  -webkit-tap-highlight-color: rgba(0,0,0,0);
}
/*== reset-end ==*/

/*== rem start ==*/
html {
  font-size: 20px;
}

@media screen and (max-width:320px) {
  html {
    font-size: 20px !important;
  }
}

@media screen and (min-width:320px) {
  html {
    font-size: 20px;
  }
}

@media screen and (min-width:340px) {
  html {
    font-size: 21.25px;
  }
}

@media screen and (min-width:360px) {
  html {
    font-size: 22.5px;
  }
}

@media screen and (min-width:380px) {
  html {
    font-size: 23.75px;
  }
}

@media screen and (min-width:400px) {
  html {
    font-size: 25px;
  }
}

@media screen and (min-width:440px) {
  html {
    font-size: 27.5px;
  }
}

@media screen and (min-width:480px) {
  html {
    font-size: 30px;
  }
}

@media screen and (min-width:520px) {
  html {
    font-size: 32.5px;
  }
}

@media screen and (min-width:560px) {
  html {
    font-size: 35px;
  }
}

@media screen and (min-width:600px) {
  html {
    font-size: 37.5px;
  }
}

@media screen and (min-width:640px) {
  html {
    font-size: 40px;
  }
}

html {
  font-size: 100vw/16;
}
/*== rem end ==*/

/*== normal cls ==*/
.show {
  display: block !important;
}

.hide {
  display: none !important;
}

.clearfix:after {
  content: '';
  overflow: hidden;
  display: table;
  height: 0;
  clear: both;
}
/*== normal cls end ==*/