body {
    font-size: 14px;
    text-align: center;
}
a {
    text-decoration: none;
    color: #fff;
}
a:hover {
    color: rgb(247, 204, 176);
}
.section {
    text-align: center;
    background-size: cover;
    background-repeat: no-repeat;
    -webkit-background-size: cover;
    -o-background-size: cover;
}
#sec1 {
    background-image: url(../imgs/1.jpg);
    clear: both;
}
#sec2 {
    background-image: url(../imgs/2.jpg);
}
#sec3 {
    background-image: url(../imgs/3.jpg);
}
#sec4 {
    background-image: url(../imgs/4.jpg);
}
#sec5 {
    background-image: url(../imgs/5.jpg);
}
#sec6 {
    background-image: url(../imgs/6.jpg);
}
#header {
    top: 0px;
    position:fixed;
    height: 40px;
    width: 100%;
    background: rgba(51,51,51,0.3);
    z-index:9;
    color: #f2f2f2;
    display:flex;
    align-items:center;
    padding: 10px;

}
#header .main-logo {
    width: 200px;
    display:flex;
    justify-content:center;
    align-items:center;
    margin-left: 50px;
}
#header .main-logo img {
    margin-right: 10px;
}
#header .main-logo span {
    font-size: 18px;
}
#header .main-menu {
    width: 500px;
    margin-left: auto;
    font-size: 16px;
}
#header .main-menu span {
    margin: 0px 20px 0px 20px;
}

#down-android {
    width: 172px;
    height: 66px;
    float: left;
    margin-top: 30%;
    margin-left: 16%;
}
#down-appstore {
    width: 172px;
    height: 66px;
    float: left;
    margin-top: 30%;
}
.btn-img {
    width: 100%;
    height: auto;
}
.beian {
    text-align: center;
    position: absolute;
    bottom: 0;
    padding-left: 30%;
}
.beian a {
    color: rgb(163, 86, 34);
}
.beian a:hover {
    color: rgb(77, 54, 40);
}