.top-full-banner{
    width: 100%;
    height: 100vh;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    background: url(https://picsum.photos/1920/1080) no-repeat;
    background-position: center center;
    background-size: cover;
    padding: 0;
    position: relative;
 
}

@media all and (max-width: 768px){

    .top-full-banner{
       
        background: url(https://picsum.photos/id/468/768/1080) no-repeat;
        background-position: center center;
        background-size: cover;

    }

} 


.top-full-banner .title-box{
    text-align: left;
}

/* ipad  768px */
@media all and (max-width: 768px){

    .top-full-banner .title-box{
        width: 480px;
        
    }

}

@media all and (min-width:500px) and (max-width:549px){

    .top-full-banner .title-box{
        width: 420px;
        
    }

}

@media all and (min-width:450px) and (max-width:499px){

    .top-full-banner .title-box{
        width: 390px;
        
    }

}

/* iPhone 12 Pro Max 428px */
@media all and (min-width:428px) and (max-width:499px){

    .top-full-banner .title-box{
        width: 380px;
        
    }

}

/* iphone 6/7/8 plus  &  iPhone XS Max  &  iPhone 11 Pro Max 414px */
@media all and (min-width:414px) and (max-width:427px){

    .top-full-banner .title-box{
        width: 360px;
        
    }

}

/* iphone 12 & iphone 12 Pro  390px */
@media all and (min-width:390px) and (max-width:413px){

    .top-full-banner .title-box{
        width: 340px;
        
    }

}

/* iphone X  &  iphone 6/7/8  &  iPhone 11 Pro  375px*/
@media all and (min-width:375px) and (max-width:389px){

    .top-full-banner .title-box{
        width: 320px;
        
    }

}

/* iphone 12 mini  360px*/
@media all and (min-width:321px) and (max-width:374px){

    .top-full-banner .title-box{
        width: 310px;
        
    }
}

@media all and (min-width:321px) and (max-width:374px){

    .top-full-banner .title-box{
        width: 290px;
        
    }
}

/* iphone 5/SE 320px*/
@media all and (max-width:320px){

    .top-full-banner .title-box{
        width: 280px;
        
    }
}

/* 320px以下 */
@media all and (max-width:319px){

    .top-full-banner .title-box{
        width: 250px;
        
    }
}

.banner-arrow{
    width: 30px;
    height: 30px;
    position: absolute;
    margin: auto;
    left: 0;
    right: 0;
    top: 70%;
    bottom: 0px;
    animation: arrowAni 1.5s infinite;
    -webkit-animation: arrowAni 1.5s infinite;
   
}

@-webkit-keyframes arrowAni {
    0% {
      -webkit-transform: translate(0, 0);
      opacity: 0;
    }
    50% {
      opacity: 1;
    }
    100% {
      -webkit-transform: translate(0px, 20px);
      opacity: 0;
    }
}

@keyframes arrowAni {
    0% {
      transform: translate(0, 0);
      opacity: 0;
    }
    50% {
      opacity: 1;
    }
    100% {
      transform: translate(0px, 20px);
      opacity: 0;
    }
}

