移动端清除默认样式

body,
body *{
    -webkit-text-size-adjust:100%;
}
body,
h1{
    margin:0;
    font-family: Helvetica;
}
ul{
    margin: 0;
    padding: 0;
    list-style: none;
}
strong{
    font-weight: normal;
}
a,
input,
button{
    -webkit-tap-highlight-color:rgba(0,0,0,0);
    -webkit-appearance: none;
}
a{
    text-decoration: none;
}

清除浮动

.clearfix{
     *zoom:1;
}
.clearfix:after{
content:'';
display:block;
clear:both;
}