.index-banner-box{
    width: 100%;
    display: block;
    position: relative;
    overflow: hidden;
    margin-top: 80px;
}
.index-banner{
    height: calc(100vh - 80px);
}
.not-banner{
    display: none;
}
.index-banner-logo{
    position: absolute;
    bottom: 20vh;
    right: calc((50% - 250px) / 2);
}



@media only screen and (max-width: 1000px){
    .index-banner-logo{
        width: 30vw;
        bottom: 15vw;
        right: 10vw;
    }
    .index-banner{
        height: 75vw;
    }
}
@media only screen and (max-width: 550px){
    .index-banner-box{
        margin-top: 63px;
    }
    .index-banner-logo{
        bottom: 10vw;
    }
}




@media only screen and (min-width: 769px){
    .index-banner-logo::after{
        content: '';
        width: 25px;
        height: 22px;
        background-color: #fff;
        position: absolute;
        top: 21%;
        left: 29%;
        border-radius: 50%;
        opacity: 0;
    }
    @-webkit-keyframes fade_eye {
        0%,
        48%,
        52%,
        56%,
        100% {
            opacity: 0;
            top: 18%;
        
        }
        
        50%,
        54% {
            opacity: 1;
            top: 21%;
        
        }
    }
    @keyframes fade_eye {
        0%,
        48%,
        52%,
        56%,
        100% {
            opacity: 0;
            top: 18%;
        
        }
        
        50%,
        54% {
            opacity: 1;
            top: 21%;
        
        }
    }
    .index-banner-logo::after{
        animation: fade_eye 5s linear 0s infinite;
    }
}