.page-top-fab {
    position: fixed;
    right: 134px;
    bottom: 24px;
    z-index: 1100;
    width: 62px;
    height: 62px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.55);
    background: linear-gradient(145deg, #1b5f8e 0%, #0f3f62 58%, #0a2e48 100%);
    box-shadow: 0 18px 40px rgba(12, 37, 56, 0.34), inset 0 1px 0 rgba(255, 255, 255, 0.28);
    color: #ffffff;
    font-family: "Helvetica Neue", "Noto Sans JP", Arial, "Hiragino Sans",
        "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
    font-weight: 700;
    font-size: 10px;
    letter-spacing: 0.08em;
    line-height: 1.2;
    text-align: center;
    opacity: 0;
    transform: translateY(20px) scale(0.92);
    pointer-events: none;
    transition: opacity 220ms ease, transform 220ms ease, box-shadow 220ms ease;
    cursor: pointer;
}

.page-top-fab .arrow {
    display: block;
    font-size: 15px;
    line-height: 1;
}

.page-top-fab.is-visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.page-top-fab:hover {
    box-shadow:
        0 20px 44px rgba(12, 37, 56, 0.42),
        inset 0 1px 0 rgba(255, 255, 255, 0.34);
}

@media screen and (max-width: 767px) {
    .page-top-fab {
        right: 16px;
        bottom: 24px;
    }
}