/* CSS Document */
html, body, h1, h2, h3, h4, h5, h6, div, ul, ol, li, dl, dt, dd, p, form, input, select, button, textarea, table, tr, th, td, iframe {
  margin: 0;
  padding: 0;
}
ul, ol {
  list-style: none;
}
img {
  border-style: none;
  vertical-align: middle;
}
body {
  font-size: 14px;
  color: #333;
  min-height: 100vh;
  width: 100%;
  background-color: #F9FAFB;
  display: flex;
  flex-direction: column;
}
main {
  flex: 1;
}
/* 布局 */
.container {
  margin: auto;
  padding: 0 20px;
  max-width: 1200px;
}
/* 表单去掉默认样式  */
input, select, textarea, label, button {
  box-sizing: border-box;
  font-size: 14px;
  vertical-align: middle;
  outline: medium;
}