/* 基础样式 */
*{
    margin: 0 ;
    padding: 0 ;
}
ul,ol {
    list-style: none;
}
a {
    text-decoration: none;
}
p {
    margin: 0;
}


.clearfix::after {
    content: '';
    display: block;
    height: 0;
    line-height: 0;
    visibility: hidden;
    clear: both;
}