/** 清除内外边距 **/
body,
h1,
h2,
h3,
h4,
h5,
h6,
hr,
p,
blockquote,
/* structural elements 结构元素 */
dl,
dt,
dd,
ul,
ol,
li,
/* list elements 列表元素 */
pre,
/* text formatting elements 文本格式元素 */
form,
fieldset,
legend,
button,
input,
textarea,
/* form elements 表单元素 */
th,
td /* table elements 表格元素 */{
    margin: 0;
    padding: 0;
}
/** 设置默认字体 **/
body,
button,
input,
select,
textarea /* for ie */{
    font: 14px/1.5 tahoma, \5b8b\4f53, sans-serif;
}
h1,
h2,
h3,
h4,
h5,
h6{
    font-size: 100%;
    font-weight: normal;
}
address,
cite,
dfn,
em,
var{
    font-style: normal;
} /* 将斜体扶正 */
code,
kbd,
pre,
samp{
    font-family: courier new, courier, monospace;
} /* 统一等宽字体 */
small{
    font-size: 12px;
} /* 小于 12px 的中文很难阅读, 让 small 正常化 */
/** 重置列表元素 **/
ul,
ol{
    list-style: none;
}
/** 重置文本格式元素 **/
a{
    text-decoration: none;
}
a:hover{
    text-decoration: underline;
}
sup{
    vertical-align: text-top;
} /* 重置, 减少对行高的影响 */
sub{
    vertical-align: text-bottom;
}
/** 重置表单元素 **/
legend{
    color: #000;
} /* for ie6 */
fieldset,
img{
    border: 0;
} /* img 搭车：让链接里的 img 无边框 */
button,
input,
select,
textarea{
    font-size: 100%;
} /* 使得表单元素在 ie 下能继承字体大小 */
/* 注：optgroup 无法扶正 */
/** 重置表格元素 **/
table{
    border-spacing: 0; 
    border-collapse: collapse;
}
/* 重置 HTML5 元素 */
article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section,
summary,
time,
mark,
audio,
video{
    display: block;

    margin: 0;
    padding: 0;
}
mark{
    background: #ff0;
}
.op-section img{
	display: block;
    width: 100%;
	height: 100%;
	max-height: 910px;
    margin:0 auto ;
    /*border:1px solid red;*/
}

video{
    width: 100%;
    height: 100%;
    /*border:1px solid red;*/
}
#frame div{
    background: #232323;
}
.nav{
	position: fixed;
	height: 6vmin;
	width: 80vmin;
	top:3vmin;
	right: 1vmin;
	overflow: visible ;
	display: none;

}
.nav>ul {
	width: 100%;
	overflow: visible;

}
.nav>ul>li{

	float: left;
	font-family: "Microsoft YaHei";
	text-align: center;
	width: 15vmin;
	line-height: 6vmin;
	font-size: 2vmin;
	background: #474445;
	border-right: 3px solid #232021;
	cursor:pointer;
	position: relative;
	overflow: visible;
	background: url("../video/1.png") repeat-x;

}
.nav>ul>li:first-child{
	border-radius:10px 0 0 10px;
}
.nav>ul>li:last-child{
	border-radius: 0 10px  10px 0;
	border-right: none;
}
.nav>ul>li:hover{
	background: url("../video/2.png");
	/*background-size:100%;*/
}
.nav>ul>li:hover ul{
	display: block;
}
.sonUi{
	display: none;
	position: relative;
	top: 0vmin;
	z-index: 2;
}
.sonUi li{
	width: 14.7vmin;
	height: 3.6vmin;
	font-family: "Microsoft YaHei";
	line-height: 3.6vmin;
	z-index: 2;
	font-size: 1.8vmin;
	color:#fff;
	background: #525051;
}
.sonUi li:last-child{
	border-bottom:none;
}