html,
body,
div,
span,
object,
li,
ul,
img iframe,
h1,
h2,
h3,
h4,
h5,
h6,
p,
pre,
a,
em,
img,
strong,
sub,
sup,
b,
i,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label,
legend,
table,
tbody,
tfoot,
thead,
tr,
th,
td,
article,
aside,
canvas,
details,
embed,
input,
figure,
figcaption,
footer,
header,
menu,
nav,
output,
ruby,
section,
summary,
time,
mark,
audio,
video {
    margin: 0;
    padding: 0;
    border: 0;
    outline: none;
    font-size: 100%;
    font-family: "Helvetica Neue", Helvetica, "PingFang SC", "Hiragino Sans GB",
        "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

li {
    list-style: none;
}

img {
    width: auto;
    height: auto;
    border-width: 0 0 0 0;
}

a {
    text-decoration: none;
}

@media screen and (min-width: 1280px) {
    html {
        overflow-x: hidden;
    }
}
@media screen and (min-width: 769px) {
    html {
        margin: 0 auto;
        min-width: 1280px;
    }
}
@media screen and (max-width: 768px) {
    html {
        width: 100%;
    }
}