body,
html {

    height: 100%;
    width: 100%;
    margin: 0px;
    padding: 0px;
    overflow: hidden;
    color: #fff;
   
}
*{
    text-decoration: none;
    padding: 0px;margin: 0px;
}
a{color: #fff;}
a:hover{color: #1361AE;}

body {
    display: flex;
    justify-content: center;
    /* 水平居中 */
    align-items: center;
    /* 垂直居中 */
    background: #000;
    background-image: radial-gradient(circle at center, rgba(19, 97, 147, 1), rgba(0, 0, 0, 0));
    flex-direction: column;
}
.pchide{
    display: none !important;
}
.mbhide{
    display: block !important;
}
.imagediv {
    width:100%;
    flex: 1;
    padding: 30px;
    position: relative;
    text-align: center;
    display: flex;
    justify-content: center;
    /* 水平居中 */
    align-items: center;
    /* 垂直居中 */
}
.yhlogo img{max-width: 60%; width: 350px; }
.yhlogo{
    margin-top: -100px; 
}
.yhlogo h2{font-size: 40px;font-weight: normal;}
.yhlogo h1{font-size: 30px;font-weight: normal;margin-bottom: 10px;}

.appstore::before {
    content: "\e881";
    font-family: "iconfont";
    display: block;
    float: left;
    font-size: 50px;
    margin-right: 3px;
}

.appstore {
    position: absolute;
    z-index: 9999;
    display: block;
    bottom: 50px;
    background-color: #000;
    color: #fff;
    width: 155px;
    text-align: center;
    font-size: 20px;
    padding: 5px 10px;
    border-radius: 20px;
    text-align: left;
    cursor: pointer;
    transform: translate(-50%, 0);
    left: 50%;
    /* 水平居中 */
}
.appstore:hover{color: #fff;}
.appstore::after {
    display: block;
    content: "下载";
    text-align: left;
    margin-left: 8px;
    font-size: 16px;
    opacity: 0.8;
}

.appstore:hover {
    background-color: #1361AE;
}

.copydiv {
    padding: 30px 0px;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 40px;
    font-size: 12px;
  
    flex-wrap: wrap;
}

.copydiv a {
    margin: 0px 5px;
    display: block;
    color: #6f6f6f;
}
.copydiv a:hover{
    color: #1361AE;
}

@media screen and (max-device-width: 700px) {
    .pchide{
        display: block !important;
    }
    .mbhide{
        display: none !important;
    }
}