* {
    margin: 0;
    padding: 0;
}
.clearfix:after {
    content: "";
    visibility: hidden;
    clear: both;
    display: block;
}
.left,.fl{
    float: left;
}
.right,.fr {
    float: right;
}
.w {
    width: 1200px;
    margin: auto;
}
body,
a,
p,
div,
button,
img,
span,
ul,
ol,
li,
table,
input,
select,
textarea,
em,
i,
h1,
h2,
h3,
h4,
h5,
h6 {
    font-style: normal;
    margin: 0;
    padding: 0;
    border: 0;
    outline: none;
    list-style-type: none;
    text-decoration: none;
    font-family: '微软雅黑', 'Microsoft YaHei';
    color:#333;
}
@media screen and (max-width:635px){
    .w{width:100%;padding:0;box-sizing:border-box;}
}