body, h1, h2, h3, h4, h5, h6, hr, p, blockquote, dl, dt, dd, ul, ol, li, pre, form, fieldset, label, button, input, select, option, textarea, optgroup, table, thead, tbody, tfoot, tr, th, td, div, span, img, a, em, i, iframe,pre :before, :after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body, button, input, select, option, textarea, optgroup, img {
  font: 16px/1 "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Heiti SC", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  outline: none;
  border: none;
}

textarea {
  resize: none;
  overflow: auto;
}

ul, ol {
  list-style: none;
}

a {
  text-decoration: none;
  background-color: transparent;
  color: #000;
}

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

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

strong,b{
  font-weight: normal;
}

article, aside, footer, header, nav, section, figcaption, figure, main, details, menu {
  display: block;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

.clearfix:after {
  content: "";
  display: table;
  clear: both;
}