/* - - - - - - - - - 各浏览器样式默认值标准化 - - - - - - - - -*/
html,
body,
span,
object,
iframe,
h1,
h2,
h3,
h4,
h5,
p,
blockquote,
pre,
a,
address,
code,
del,
em,
img,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label {
    margin: 0;
    padding: 0;
    border: 0;
    font-style: inherit;
    font-family: inherit;
    vertical-align: baseline;
}

article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section,
summary,
audio,
video {
    margin: 0;
    padding: 0;
    display: block;
}

html {
    -webkit-text-size-adjust: none;
}

img {
    border: none;
    vertical-align: middle;
}

input,
select,
button {
    padding: 0;
    margin: 0;
    outline: none;
    font-family: inherit;
    vertical-align: middle;
}

textarea {
    font-family: inherit;
    padding: 0;
    margin: 0;
}

button {
    cursor: pointer;
}

html {
    overflow-x: hidden;
}

body {
    font-size: 12px;
    /* background: #100f1d url(../images/body.jpg) repeat-y center top; */
    font-family: 'Microsoft YaHei';
}

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

h1 {
    font-size: 24px;
}

h2 {
    font-size: 18px;
}

h3,
h4 {
    font-size: 14px;
}

h5 {
    font-size: 12px;
}

i,
em,
address {
    font-style: normal;
}

a {
    text-decoration: none;
    color: #4f4f4f;
}

a:hover {
    text-decoration: underline;
    transition: color 200ms linear 0s, background-color 200ms linear 0s, border-color 200ms linear 0s;
}

/*鼠标悬停时*/
a:active {}

/*点击与释放时*/
a:visited {}

/* 访问过*/
/* - - - - - - - - - 常用类样式 - - - - - - - - -*/
.photo_fullsize img {
    display: block;
    width: 100%;
    height: 100%;
}

/*图片全尺寸*/
.no_bor {
    border: none !important;
}

/*无边框*/
.no_bg {
    background: none !important;
}

/*无背景*/
.clear {
    display: block;
    height: 0;
    line-height: 0;
    overflow: hidden;
    clear: both;
    font-size: 0;
}

/*清除浮动*/
.clear_::after {
    content: "";
    display: block;
    clear: both;
    height: 0;
    line-height: 0;
    overflow: hidden;
}

/*清除浮动*/
.center {
    margin: 0 auto;
    width: 1280px;
}

#centera {
    margin: 0 auto;
    width: 1280px;
}

.center4 {
    margin: 0 auto;
    width: 1280px;
}

/*让内容区块居中*/
/*图片全尺寸*/
.photo,
.photo_fullsize {
    display: block;
    overflow: hidden;
}

.photo img,
.photo_fullsize img {
    display: block;
    width: 100%;
    height: 100%;
}

/*图片自适应尺寸*/
.photo_autosize {
    text-align: center;
    display: block;
    overflow: hidden;
}

.photo_autosize::after {
    height: 100%;
    width: 0;
    overflow: hidden;
    font-size: 0;
    line-height: 0;
    display: inline-block;
    vertical-align: middle;
    content: "";
}

.photo_autosize img {
    max-width: 100%;
    max-height: 100%;
}

/*图片自适应全尺寸*/
.photo_autofullsize {
    overflow: hidden;
    display: block;
    background-size: cover !important
}

.photo_autofullsize img {
    display: none;
}

#backtop {
    display: none;
    background: url(../images/arrow_top.png) no-repeat left top;
    cursor: pointer;
    height: 50px;
    width: 50px;
    position: fixed;
    _position: absolute;
    bottom: 20px;
    _top: expression(eval(document.documentElement.scrollTop document.documentElement.clientHeight-this.offsetHeight-(parseInt(this.currentStyle.marginTop, 10)||0)-(parseInt(this.currentStyle.marginBottom, 10)||0)));
    _bottom: auto;
    z-index: 11500;
    right: 20px;
}

#backtop:hover {
    background-position: left bottom;
}