* {
  margin: 0;
  padding: 0;
  list-style: none;
}
html,
body,
#app {
  height: 100%;
  position: relative;
  font-size: 12px;
  font-family: Microsoft YaHei;
  min-width: 1200px;
}
input,
button,
textarea {
  outline: none;
  box-sizing: border-box;
}