html, body, div, span, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
abbr, address, cite, code,
del, dfn, em, img, ins, kbd, q, samp,
small, strong, sub, sup, var,
b, i,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, figcaption, figure,
footer, header, hgroup, menu, nav, section, summary,
time, mark, audio, video {
    margin:0;
    /* padding:0;
    border:0;
    outline:0; */
    color: #222;
    font-size:16px;
    background:transparent;
}

input,button,select,textarea{outline:none;border:none;padding:0;}
/*清除浮动代码*/
.clearfloat:after{content:"";display:block;height:0;visibility:hidden;clear:both;}
.clearfloat{*zoom:1}


/* flex布局 */
.flex-auto {
    flex: 0 0 auto;
}

.flex {
    display: flex;
    display: -webkit-flex;
}
.align-center {
    align-items: center;
    -webkit-align-items: center;
}
.align-between {
    align-items: space-between;
    -webkit-align-items: space-between;
}
.justify-end {
    justify-content: flex-end;
    -webkit-justify-content: flex-end;
}
.justify-center {
    justify-content: center;
    -webkit-justify-content: center;
}
.justify-between {
    justify-content: space-between;
    -webkit-justify-content: space-between;
}
.justify-around {
    justify-content: space-around;
    -webkit-justify-content: space-around;
}
.flex-wrap {
    flex-wrap: wrap;
    -webkit-flex-wrap: wrap;
}
.flex-column {
    flex-direction: column;
    -webkit-flex-direction: column;
}