/* css reset */
body {
    font-size: 12px;
    font-family: 'Microsoft Yahei';
    overflow-x: hidden;
}

body,
div,
dl,
dt,
dd,
ul,
ol,
nl,
li,
h1,
h2,
h3,
h4,
h5,
h6,
p,
span,
a,
b,
strong,
object,
iframe,
label,
img,
blockquote,
ins,
del,
select,
form,
input,
textarea,
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
}

article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section {
    display: block
}

a {
    text-decoration: none;
}

li {
    list-style: none outside none;
}

fieldset,
img {
    border: 0 none;
}

img {
    padding: 0;
    margin: 0;
    vertical-align: top;
}

h1,
h2,
h3,
h4,
h5,
h6,
th {
    font-size: 12px;
    font-weight: normal;
}

textarea {
    resize: none
}

input:focus,
select:focus,
textarea:focus,
a:focus {
    outline: 0 none
}

label {
    vertical-align: middle;
}

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

.clearfix {
    zoom: 1
}

em,
cite,
dfn {
    font-style: normal;
}

.clearboth {
    width: 100%;
    clear: both;
    float: none;
    margin: 0;
    padding: 0;
    font-size: 0px;
    height: 0px;
    overflow: hidden;
}

.clear {
    clear: both;
    height: 0;
    font-size: 0;
    line-height: 0;
}

.hidden {
    overflow: hidden;
}

.fl {
    float: left;
}

.fr {
    float: right;
}

.pr {
    position: relative;
}

.pa {
    position: absolute;
}

.center {
    text-align: center;
}

.tright {
    text-align: right;
}

.ti {
    text-indent: -999em;
}

.none {
    display: none;
}

.tia a {
    display: block;
    width: 100%;
    height: 100%;
    text-indent: -999em;
}

table {
    border-collapse: collapse;
    border-spacing: 0
}

/*content*/
.sec_01 h1 {
    display: none;
}

.o-link {
    position: absolute;
    top: 22px;
    right: -50px;
    color: #000;
    line-height: 22px;
    text-align: right;
    font-size: 14px;
}

.o-link a {
    display: inline-block;
    margin-left: 1em;
    color: white;
}

.o-link a:hover {
    text-decoration: underline;
}

.logo {
    position: absolute;
    top: 12px;
    left: -64px;
    width: 149px;
    height: 51px;
    display: block;
    background: url(https://static.web.sdo.com/aion/pic/project/2021Midautumn/logo.png) no-repeat;
}

/*分页*/
.section {
    height: 860px;
    background-size: 2560px 860px;
    background-repeat: no-repeat;
    background-position: center;
}

.section .con {
    width: 1000px;
    margin: 0 auto;
}

.sec_01 {
    background-image: url('https://static.web.sdo.com/aion/pic/project/20211109/sec (4).jpg');
}

.sec_02 {
    background-image: url('https://static.web.sdo.com/aion/pic/project/20211109/sec (5).jpg');
}

.sec_03 {
    background-image: url('https://static.web.sdo.com/aion/pic/project/20211109/sec (1).jpg');
}

.sec_04 {
    background-image: url('https://static.web.sdo.com/aion/pic/project/20211109/sec (2).jpg');
}

.sec_05 {
    background-image: url('https://static.web.sdo.com/aion/pic/project/20211109/sec (3).jpg');
}