body > iframe {
    width: 100%;
    height: 100vh;
    position: fixed;
    top: 0;
}

body {
    overflow: hidden;
    margin: 0;
    background:#202020;
}

.banner_wrapper {
    position: fixed;
    z-index: 5;
}

.banner-left { 
    bottom: 0;
}

.banner-right {
    right: 20px;
    width: 160px;
    bottom: 0;
}

.banner-ngang {
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}
@media only screen and (max-width: 1500px) {
    .banner-right,.banner-left {
        display: none;
    }
}
.ngang-mobi{
    display: none;
}
@media only screen and (max-width: 728px) {

    .ngang-pc {
        display: none;
    }
    .ngang-mobi{
        display: block;
    }
}
     
.header {
    width: 160px;
    height: 50px;
    display: block;
    margin: auto;
    position: fixed;
    left: calc(50vw);
    transform: translateX(-508px);
    z-index: 2;
}

.header a {
    max-width: 1016px;
    height: 50px;
    display: block;
    margin: 0 auto;
}

.logo {
    z-index:9999; position:fixed; top:4px; border-radius: 2px;
    display: flex;
    width: 160px;
    height: 42px;
    padding: 3px;
    padding-top: 6px;
    justify-content: space-around;
    box-sizing: border-box;
}

@media only screen and (max-width: 896px) {
    .header {
        left: calc(50vw - 80px);
        transform: initial;
    }
}