css清除样式

html, body, div, ul, li, h1, h2, h3, h4, h5, h6, p, dl, dt, dd, ol, form, input, textarea, th, td, select {
    margin: 0;
    padding: 0;
}
ul,ol {
    list-style: none;
}
 
img {
    border: none;
    vertical-align: middle;
}

a {
    text-decoration: none;
    color: #232323;
}
 
table {
    border-collapse: collapse;
    table-layout: fixed;
}
input, textarea {
    outline: none;
    border: none;
}
 
textarea {
    resize: none;
    overflow: auto;
}

.clearfix:after {
    content: " ";
    width: 0;
    height: 0;
    visibility: hidden;
    display: block;
    clear: both;
    overflow:hidden;
}
 
.fl {
    float: left
}
 
.fr {
    float: right
}