header .banner{
    width: 100%;
}

body{
    background: url(../images/bg.png)!important;
    background: 100% 100%;
}

#main{
    width: 1200px;
    margin: 0 auto;
    position: relative;
}

.mt50{
    margin-top: 50px;
}

.bvWrap{
    width: 900px;
    margin-top: 34px;
}

.content_title{
    font-size: 24px;
    line-height: 31px;
    text-align: center;
    margin-top: 28px;
}
.svWrap{
    width: 580px;
    background: #f2f2f2;
}

.svWrap video{
    width: 100%;
	height:390px;
}

.part_title{
    width: 690px;
    line-height: 50px;
    height: 50px;
    text-align: center;
    font-size: 24px;
    line-height: 50px;
    color: #fff;
    margin: 0 auto;
}

.bg_b{
    background: #098dc2;
}

.videoList{
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-top: 30px;
}

.videoList li{
    width: 580px;
    margin-bottom: 30px;
}
@media only screen and (max-width: 750px) {
	#main {
		width: 100%;
	}
	.videoList li {
		width: 50%;
	}
	.svWrap {
		width: 98%;
	}
	.svWrap video {
		height: 100px;
	}
	.part_title{
		width: 90%;
	}
	.content_title {
		font-size: 14px;
		line-height: 14px;
		margin-top: 10px;
	}
}