*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body{
  background-color: #FFFFFF;
}

ul li{
  list-style: none;
}

a{
  text-decoration: none;
  color: #000000;
  -webkit-tap-highlight-color: rgba(255, 255, 255, 0);
}

button,
input{
  border: none;
  outline: none;
  background-color: transparent;
}

img {
  border: 0;
  vertical-align: middle;
}

em,i{
    font-style: normal;
}

/* 浮动 */
.fl{
  float: left;
}

.fr{
  float: right;
}

/* 版心 */
.w{
  width: 83.3%;
  margin: auto;
}