body,
h1 {
    margin: 0;
}
html,
body {
    min-height: 100vh;
    min-height: -webkit-fill-available;
}
body {
    font-family: 'Source Han Sans CN';
    color: #333;
    background-color: rgb(43, 131, 245);
    background-image: -webkit-linear-gradient(-20deg, rgba(176, 231, 255, 1), rgba(43, 131, 245, 1));
    background-image:         linear-gradient(110deg, rgba(176, 231, 255, 1), rgba(43, 131, 245, 1));
}
/* 页面头部 */
.page-header {
    margin-bottom: .3rem;
    padding-top: 1rem;
}
/* 页面头部 - 标志 */
.page-header .logo {
    margin-bottom: .1rem;
}
.page-header .logo img {
    display: block;
    width: 5.66rem;
    height: .97rem;
    margin: 0 auto;
}
.page-header small {
    font-size: .36rem;
    line-height: 1.5;
    display: block;
    margin-bottom: .26rem;
    text-align: center;
    letter-spacing: .05rem;
    color: #fff;
    text-shadow: .04rem .05rem .05rem rgba(0, 0, 0, .2);
}
.page-header .caption {
    font: 0/0 a;
    height: .4rem;
    color: transparent;
    border: 0;
    background: transparent url(../images/download/page-header-caption.png) center 0 no-repeat;
    background-size: 3.73rem .4rem;
    text-shadow: none;
}
/* 页面主体 */
.page-main {
    box-sizing: border-box;
    padding-top: 6rem;
    padding-bottom: 1rem;
    background: transparent url(../images/download/bg.png) center 0 no-repeat;
    background-size: 6.95rem 6rem;
}
/* 页面主体 - 下载按钮 */
.page-main .btn-download {
    font-size: .36rem;
    line-height: 1.5;
    display: block;
    margin-top: .4rem;
    margin-right: 1.2rem;
    margin-left: 1.2rem;
    padding: .15rem;
    user-select: none;
    transition: color .15s ease-in-out, background-color .15s ease-in-out, border-color .15s ease-in-out, box-shadow .15s ease-in-out;
    text-align: center;
    white-space: nowrap;
    text-decoration: none;
    color: #2c82f9;
    border-radius: .1rem;
    background-color: #fff;
    box-shadow: .04rem .05rem .05rem rgba(0, 0, 0, .2);
}
.page-main .btn-download:first-child {
    margin-top: 0;
}

.download-tips {
    font-size: .4rem;
    line-height: 2;
    position: fixed;
    z-index: 9999;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    display: none;
    padding: 1rem 1rem 0 .6rem;
    color: #fff;
    background-color: #000;
    background-color: rgba(0, 0, 0, .8);
}
.download-tips .icon-tips {
    position: absolute;
    top: .3rem;
    right: .15rem;
    width: .49rem;
    height: 1.08rem;
    background: transparent url(../images/download_app_tips_icon.png) 0 0 no-repeat;
    background-size: 100% 100%;
}