html body{
    background-image: url("../images/bg_img_download.png");
    background-size: contain;
    background-color: #e9ecf3;
    background-repeat: no-repeat;
    /*overflow:hidden;*/
}
.main_us{
    width: 1200px;
    margin: 0 auto;
    background-color: #fff;
    width:80%;
    max-width:1280px;
    min-width:1200px;
    padding-top: 10px;
}
.xiazai{
    /*height: 20px;*/
    /*line-height: 20px;*/
    padding: 10px 20px;
}
.xiazai .home1{
    color: #4e9be9;
}
.xiazai span{
    color: #ccc;
    font-size: 12px;
}



.zhinan{
    /*display: flex;*/
    position: relative;
}
.left{
    position: absolute;
    margin-left: -20px;
    width: 220px;
    height: 400px;
    background-color: #4e9be9;
    color: #fff;
    background: linear-gradient(#4e9be9, #5667cf);
    
}
.left ul{
    margin-top: 40px;
}
.left .left-icon{
    font-size: 22px;
    padding-right: 10px;
}
.left li{
    height: 50px;
    line-height: 50px;
    padding-left: 30px;
    font-size: 16px;
}
.left ul li a{
    display: inline-block;
    height: 50px;
    line-height: 50px;
    color: #fff;
}
.left .iconfont{
    margin-right: 10px;
    font-size: 18px;
}
.left ul li:hover{
    background: linear-gradient(to left, rgba(0, 0, 0, 0),rgba(255,255,255,.2), rgba(0,0,0,0));
}
.left-img{
    position: absolute;
    left: 0;
    top: 393px;
    right: 0;
    bottom: 0;
    width: 20px;
}
.left-img img{
    width: 100%;
}
.right{
    flex: 1;
    background-color: #fff;
    /* height: 2000px; */
    margin-left: 216px;
}
.active{
    background: linear-gradient(to left, rgba(0, 0, 0, 0),rgba(255,255,255,.2), rgba(0,0,0,0));
}


.download{
    margin: 10px 20px;
    width: 80px;;
    text-align: center;
    font-size: 18px;
    border-left: 2px solid #4e9be9;
}
.info{
    width: 900px;
    margin: 10px 20px;
    /* background-color: antiquewhite; */
    /* padding-bottom: 30px; */
}
.info-top{
    /* height: 300px; */
    padding-bottom: 30px;
    border-top: 1px solid #ccc;
}
.info-icon{
    box-sizing: border-box;
    width: 300px;
    text-align: center;
}
.info-icon p{
    width: 200px;
    margin: 0 auto;
    color: #aaa;
}
.icon{
    width: 150px;
    margin: 0 auto;
    height: 150px;
    line-height: 150px;
    /*border: 3px solid #000;*/
    border-radius: 50%;
    margin-top: 40px;
    margin-bottom: 20px;
}
/*.icon:hover{
    background-color: #4e9be9;
    color: #fff;
    border: 3px solid #4e9be9;
}*/
.icon .iconfont{
    font-size: 60px;
}

.info-bom{
    border-top: 1px solid #ccc;
    padding-bottom: 40px;
}
.bom-left, .bom-right{
    box-sizing: border-box;
    width: 382px;
    height: 180px;
    padding: 20px;
    border: 1px solid #000;
    margin-top: 40px;
    margin-left: 40px;
}
.bom-left{
}
.bom-img{
    width: 80px;
    /* height: 100px; */
    text-align: center;
}
.bom-img img{
    width: 100%;
    margin-bottom: 10px;
    margin-top: 15px;
}
.bom-text{
    margin-left: 30px;
    margin-top: 20px;
}
.bom-text p{
    color: #999;
}