html,
body,
div,
span,
applet,
object,
iframe,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
a,
abbr,
acronym,
address,
big,
cite,
code,
del,
dfn,
em,
img,
ins,
kbd,
q,
s,
samp,
small,
strike,
sub,
sup,
tt,
var,
b,
u,
i,
center,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label,
legend,
table,
caption,
tbody,
tfoot,
thead,
tr,
th,
td,
article,
aside,
canvas,
details,
embed,
figure,
figcaption,
footer,
header,
hgroup,
menu,
nav,
output,
ruby,
section,
summary,
time,
mark,
audio,
button,
video{
    margin: 0;
    padding: 0;
    border: 0;
    
}

/* HTML5 display-role reset for older browsers */
article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section {
    display: block;
}

ol,
ul,
li {
    list-style: none;
}

html,
body {
    width: 100%;
    font-family: "Microsoft YaHei", "黑体", "宋体", "微软雅黑", sans-serif;
    background: rgba(228,235,245,.2)
}
img{
    max-width: 100%;
}

/*隐藏*/
.dn {
    display: none;
}