@charset "UTF-8";

.big-wall{
    position:fixed;
    top: 0;
    left: 0;
    width:100%;
    height:100%;
    min-width: 1000px;
    z-index:-10;
    background-color: #fff;
    background: url(../img/big-bg.png) no-repeat;
    background-size: cover;
    -webkit-background-size: cover;
    -o-background-size: cover;
    background-position: center 0;
}

.nav{
    width: 100%;
    background-color: #ffffff;
    box-shadow: 0px 0px 16px 0px rgba(23, 52, 118, 0.39);
}

.nav-center{
    width: 1200px;
    height: 60px;
    vertical-align: top;
    margin: auto;
}
.logo{
    display: inline-block;
    width: 180px;
    height: 40px;
    vertical-align: middle;
}

.nav-only{
    display: inline-block;
    height: 60px;
    line-height: 60px;
    padding: 0 20px;
    font-size: 18px;
    border-bottom: 4px solid #ffb21e;
    margin-left: 535px;
    box-sizing: border-box;
}

.center_bg{
    width: 1200px;
    margin: auto;
    padding-top:7%;
    vertical-align: top;
}

.center_bg>div{
    display: inline-block;
    vertical-align: top;
}

.center_bg>div:first-child{
    margin-right: 70px;
    padding-top:15px;
}

.big-title img{
    display: inline-block;
    width: 67px;
    height: 67px;
    margin-right: 15px;
}

.big-title{
    margin-bottom: 100px;
}

.big-title>div{
    display: inline-block;

}

.big-title>div p:first-child{
    font-size: 34px;
    color: #ffffff;
    margin-bottom: 10px;
    font-weight: bold;
}

.big-title>div p:last-child{
    font-size: 18px;
    color: #ffffff;
}

.m_shu{
    font-size: 34px;
    color: #ffb21e;
    font-weight: bold;
    margin-bottom: 33px;
}

.sm_shu{
    font-size: 20px;
    color: #ffffff;
    margin-bottom: 10px;
}

.download{
    display: block;
    width: 300px;
    height: 66px;
    background: url("../img/download-icon.png") no-repeat center;
    background-size: 100% 100%;
    margin-top: 90px;
}

.rig_pic{
    width: 725px;
    height: 601px;
}

.rig_pic img{
    width: 100%;
    height: 100%;
}

.bottom_row{
    position: fixed;
    left: 0;
    bottom: 0;
    width: 100%;
    background-color: #ffffff;
    font-size: 16px;
    color: #575d6b;
    text-align: center;
    padding: 30px 0;
}

.bottom_row a{
    font-size: 16px;
    color: #2496f6;
}