vue初始化样式

#app {
  font-family: ‘Avenir‘, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: #2c3e50;
  width: 100%;
  height: 100%;
}
* {
  margin: 0;
  padding: 0;
}
html, body {
  width: 100%;
  height: 100%;
}
ul {
  list-style:none;
}
a {
  text-decoration: none;
} 
img{
  vertical-align:top;
  border:none;
}