*{margin: 0;padding: 0;box-sizing: border-box;}
html,body{width: 100%;height: 100vh;}

.big_bg{width: 100%;min-height: 100vh;background: url(./bg.png)no-repeat center;background-size: cover;}
.wp{width: 1000px;margin: 0 auto;padding-top: 70px;padding-bottom: 20px;display: flex;flex-direction: column;justify-content: space-between;
    min-height: 100vh;
}
.logo_w{width: 200px;}
.logo_w img{width: 100%;}
.content_w{display: flex;justify-content: space-between;}
.content_l{width: 55%;padding-top: 50px;}
.content_r{width: 35%;}
.content_r img{width: 100%;}
.content_t{font-size: 18px;text-indent: 36px;line-height: 2;color: #fff;text-align: justify;}
.download_w{margin-top: 30px;display: flex;justify-content: center;}
.download_item{display: flex;justify-content: center;align-items: center;padding: 10px 25px;background: #fff;height: 40px;
border-radius: 20px;margin: 0 10px;color: #666;position: relative;}
.download_item > img{width: 20px;margin-left: 5px;}
.down_qr{width: 140px;position: absolute;left: 50%;top: 101%;background: #fff;border-radius: 10px;padding: 10px;z-index: 5;
    display: flex;justify-content: center;display: none;height:140px;border:1px solid #eee;transform: translateX(-50%);}
.download_item:hover .down_qr{display: flex;}
.down_qr canvas{width:100%;height:100%;}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-40px); }
}
.floating-image {
    animation: float 5s ease-in-out infinite;
}
.footer{display: flex;justify-content: center;align-items: center;color: #fff;}
.footer img{width: 20px;margin: 0 10px;}

@media screen and (max-width: 1000px) {
    .big_bg{width: 100%;min-height: 100vh;background: url(./sjbg.png)no-repeat center;background-size: cover;}
    .wp{width: 100%;padding: 20px 10px 10px;}
    .logo_w{width: 100px;}
    .content_w{flex-direction: column;}
    .content_l{width: 100%;padding-top: 20px;}
    .content_t{font-size: 16px;text-indent: 32px;line-height: 1.5;padding: 0 20px;}
    .content_r{width: 100%;display: flex;justify-content: center;margin-top: 160px;}
    .content_r img{width: 50%;}
    .download_item{font-size: 12px;padding: 10px 15px;}
}