#n {
    position: fixed;
    z-index: -1;
    top: 0;
    width: 100%;
    height: 56.35vw;
}
.about_all{
    width: 100%;
    background-color: #fff;
}
.lunbo{
    position: fixed;
    top: 0;
    z-index: -2;
    width: 100%;
    height: 600px;
    background: url(../../images/banner_05.png) no-repeat;
    background-size: cover;
    background-position: center top;
}
.main{
    width: 100%;
    height: 600px;
    position: relative;
}
.about{
    position: absolute;
    top: 28%;
    font-size: 2rem;
    color: white;
    width: 100%;
    text-align: center;
}
.about>img{
    width: 600px;
    top: -220px;
    display: inline-block;
}
.add{
    filter:blur(6px);
    transform: scale(1.2);
    transition: all 2s;
    -webkit-filter: blur(6px);  /* chrome, opera */
    -ms-filter: blur(6px);
    -moz-filter: blur(6px);
    filter:progid:DXImageTransform.Microsoft.Blur(pixelRadius=6,   MakeShadow=false);   /*  IE6~IE9  */
}
.back{
    filter:blur(0);
    transform: scale(1);
    transition: all 1s;
    -webkit-filter: blur(0);  /* chrome, opera */
    -ms-filter: blur(0);
    -moz-filter: blur(0);
    filter:progid:DXImageTransform.Microsoft.Blur(pixelRadius=6,   MakeShadow=false);   /*  IE6~IE9  */
}
.jjh{
    width: 695px;
    margin: 30px auto 0;
}