.sfb-root {
    position: relative;
    z-index: var(--sfb-z-index, 9999);
}

.sfb-banner {
    position: fixed;
    line-height: 0;
    z-index: var(--sfb-z-index, 9999);
}

.sfb-banner img {
    display: block;
    width: 100%;
    height: auto;
}

.sfb-banner-pc {
    right: var(--sfb-pc-right, 20px);
    bottom: var(--sfb-pc-bottom, 20px);
    width: min(var(--sfb-pc-width, 320px), calc(100vw - 40px));
}

.sfb-banner-mobile {
    left: 0;
    right: 0;
    bottom: 0;
    width: 100vw;
}

.sfb-close {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    font-size: 18px;
    line-height: 1;
    cursor: pointer;
    z-index: 2;
}

@media (min-width: 768px) {
    .sfb-banner-mobile {
        display: none;
    }
}

@media (max-width: 767px) {
    .sfb-banner-pc {
        display: none;
    }

    .sfb-banner-mobile img {
        width: 100vw;
        max-width: 100vw;
    }
}