body {
}
.topbanner {
    width: 100%;
    min-width:1920px;
    height:350px;
    position: relative;
    z-index: 5;
    overflow: hidden;
    background-image: url(../images/about/banner.png);
}
.topbanner ul
{
    height:30%;
}
.topbanner ul li {
    _display: inline;
    overflow: hidden;
    text-align: center;
    color:#FFFFFF;
    /*float: left;*/
}
.bigfont
{
    font-size:32px;
}
.minfont
{
    font-size:12px;
}

.barfont
{
    font-size:220px;
    
}

.manualfont {
    font-size: 36px;    
}
.manualfont p
{
    text-indent:2em;
    text-align:left;
}


.aboutfont {
    color: #FFFFFF;
    text-align: left;
}

.mainabout {
    width: 100%;
    /*min-width: 1920px;*/
    position: relative;
    z-index: 5;
    overflow: hidden;
    background-image: url(../images/about/bg.png);
}

.mainabout li{
    width:100%;
    text-align:center;
}

.mainabout img {
    width: 1080px;
    text-align: center;
    margin:0 auto;
    display: block;
    align-items: center; /* 垂直居中 */
    justify-content: center; /* 同时水平居中 */
}