.l-ft_bnr-box {
    gap: 10px 20px;
}
.l-ft_bnr-box a {
    width: calc((100% / 3) - (20px * 2 / 3));
}
.l-ft_bnr-box a:nth-of-type(1),
.l-ft_bnr-box a:nth-of-type(2),
.l-ft_bnr-box a:nth-of-type(n+3) {
    margin: 0;
}

.l-ft_bnr-box-bottom {
    display: flex;
    gap: 10px 20px;
    margin: 0 auto;
    margin-top: 30px;
    justify-content: space-between;
    max-width: 560px;
}
.l-ft_bnr-box-bottom a {
    display: block;
    max-width: 250px;
}

@media (max-width: 1000px) {
    .l-ft_bnr-box a:nth-of-type(1),
    .l-ft_bnr-box a:nth-of-type(2),
    .l-ft_bnr-box a:nth-of-type(n+3) {
        margin: 0 !important;
    }
    .l-ft_bnr-box a {
        width: calc(50% - (20px / 2));
    }
    .l-ft_bnr-box-bottom {
        padding: 0 20px;
        justify-content: center;
    }
    .l-ft_bnr-box-bottom a {
        max-width: 180px;
    }
}