* {
    padding: 0;
    margin: 0;
}
.header {
    /*border-bottom: 1px solid #b6b6b6;*/
}
.nav {
    height: 120px;
    width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo img {
    height: 50px;
}
.make-btn, .bbs-btn {
    color: #865311;
    background: #FFCA00;
    border-radius: 17px;
    height: 38px;
    line-height: 38px;
    width: 150px;
    text-align: center;
    cursor: pointer;
    margin-left: 10px;
}
.operator-btn {
    display: flex;
}
.content-box{
    width: 100%;
    background-color: #ffdc00;
}
.content {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    height: 600px;
    padding-top: 50px;
    position: relative;
}
.mark {
    width: 100%;
    font-family: PingFang SC;
    font-weight: bold;
    color: #3c3c3c;
    margin-top: 100px;
    font-size: 20px;
}
.mark img{
    width: 100%;
}
.left {
    width: 25%;
}
.right {
    width: 40%;
}
.info-box {
    position: absolute;
    right: 0;
    top: 0;
    display: flex;
    align-items: center;
    width: 70%;
}
.qr{
    margin-top: 1vw;
    margin-bottom: 0.5vw;
}
.qr img {
    width: 50%;
    height: 50%;
    border: solid 1px #fff;
    border-radius: 30px;
}
.introduce-img{
    width: 100%;
    margin-top: 30px;
}
.introduce-img img {
    width: 100%;
}
.introduce-info {
    text-align: center;
    width: 50%;
}
.app-name {
    font-size: 20px;
    font-family: PingFang SC;
    font-weight: 400;
    color: #3c3c3c;
}
.app-version {
    font-size: 15px;
    font-family: PingFang SC;
    font-weight: 500;
    color: #3c3c3c;
    margin-top: 10px;
}
.app-select {
    position: absolute;
    right: 0px;
    top: 220px;
    padding: 10px;
    border-radius: 10px;
    -webkit-box-shadow: 0 1px 10px 0 hsl(0deg 0% 70% / 50%);
    box-shadow: 0 1px 10px 0 hsl(0deg 0% 70% / 50%);
}
.app-select p {
    padding: 4px 2px;
    border-radius: 4px;
    line-height: 20px;
    margin: 10px 0;
    cursor: pointer;
    font-size: 18px;
    padding: 10px;
}
p.active {
    color: #fff;
    background: #1a9eff;
}
.app-select img {
    width: 20px;
    height: 20px;
}

.download-btn {
    color: #FFFFFF;
    background: #4a9bf8;
    border-radius: 17px;
    height: 25px;
    line-height: 25px;
    width: 100px;
    text-align: center;
    cursor: pointer;
    display: block;
}

.footer {
    background: #f8f8f8;
    color: #737373;
    line-height: 28px;
    padding: 20px 0;
    text-align: center;
}
.footer-content {
    width: 1200px;
    line-height: 28px;
    margin: 0 auto;
}
.friend-link {
    margin: 0 auto;
    width: 1280px;
    display: flex;
    height: 50px;
    line-height: 50px;
}