/* ナビゲーションリンクの強制リセット */
.header .nav__link,
.header .nav__link:hover,
.header .nav__link:focus,
.header .nav__link:active,
.header .nav__link:visited {
    text-decoration: none !important;
    border-bottom: none !important;
    text-decoration-line: none !important;
    text-decoration-style: none !important;
    text-decoration-color: transparent !important;
}

.header .nav__link::after,
.header .nav__link::before {
    display: none !important;
    content: none !important;
    text-decoration: none !important;
    border-bottom: none !important;
}