body.sub    {
    background-position: center top 78.125vw;
}

.scrollhint {
    width: 100%;
    position: relative;
    max-width: 1040px;
    padding: 0 20px;
    overflow-x: scroll;
    margin-left: auto;
    margin-right: auto;
}

.scrollhint::-webkit-scrollbar {
  display: none;
}

.scrollhint img {
    width: min(100%,700px);
    height: auto;
    max-width: none;
}

main section.sec3 .sec3_robot   {
    position: absolute;
    right: 0;
    bottom: 0;
}

main section.sec4 .inner .box > .flex   {
    gap: min(1.9841vw, 30px) min(2.6455vw, 40px);
}

main section.sec4 .inner .box > .flex > .col   {
    width: calc((100% - min(2.6455vw, 40px)) / 2);
    border-bottom: 1px dashed #007A4C;
}

main section.sec4 .inner .box > .flex > .col dt {
    background-color: #608DAA;
}

@media screen and (max-width: 834px)    {
    .scrollhint img {
        min-width: 525px !important;
    }
    
    main section.sec3 .sec3_robot   {
        position: absolute;
        right: 5vw;
        bottom: -5vw;
    }
    
    main section.sec4 .inner .box > .flex > .col:last-of-type   {
        border-bottom: 0;
    }
}