<!-- /*モバイル専用CSS　ここから*/ -->
/* ハンバーガー展開時に画面上から出るように調整 */
#navbarNav .mobile {
    position: absolute; /* ナビバーの下から出す */
    top: 100%;
    left: 0;
    width: 100%;
    background-color: #fff;
    z-index: 999;
}
/* デフォルトの3本線を消す */
.navbar-toggler {
    border: none;
    padding: 0 18px 0 18px;
}

    .navbar-toggler:focus {
        box-shadow: none;
    }

/* アイコンのベース */
.navbar-toggler-icon {
    background-image: none;
    position: relative;
    width: 24px;
    height: 2px;
    background-color: #000;
    transition: background-color 0.2s ease;
}

    /* 上下の線 */
    .navbar-toggler-icon::before,
    .navbar-toggler-icon::after {
        content: "";
        position: absolute;
        left: 0;
        width: 24px;
        height: 2px;
        background-color: #000;
        transition: transform 0.25s ease, top 0.25s ease;
    }

    .navbar-toggler-icon::before {
        top: -8px;
    }

    .navbar-toggler-icon::after {
        top: 8px;
    }

/* ----- 閉じているとき ----- */
.navbar-toggler.collapsed .navbar-toggler-icon {
    background-color: #000;
}

    .navbar-toggler.collapsed .navbar-toggler-icon::before {
        top: -8px;
        transform: rotate(0deg);
    }

    .navbar-toggler.collapsed .navbar-toggler-icon::after {
        top: 8px;
        transform: rotate(0deg);
    }

/* ----- 開いているとき（×に変形） ----- */
.navbar-toggler:not(.collapsed) .navbar-toggler-icon {
    background-color: transparent;
}

    .navbar-toggler:not(.collapsed) .navbar-toggler-icon::before {
        top: 0;
        transform: rotate(45deg);
    }

    .navbar-toggler:not(.collapsed) .navbar-toggler-icon::after {
        top: 0;
        transform: rotate(-45deg);
    }
/*naviのデザイン*/
.nav-item_title {
    background-color: #d20920;
}

    .nav-item_title > a {
        color: #ffffff !important;
        font-weight: bold;
    }
/*naviのデザインエンド*/


/* ----- 共通のアニメーション ----- */
.navbar-toggler-icon,
.navbar-toggler-icon::before,
.navbar-toggler-icon::after {
    transition: none;
}
/* メニュー開いているときの背景色 */
.custom-dropdown-bg {
    background-color: #e5e5e5; /* 薄いグレー */
    border: none;
}

#navbarNav.collapse.show, .navbar-nav.dropdown-menu.show, .dropdown-menu-.show {
    background-color: #e5e5e5; /* 薄いベージュ */
    transition: none;
}

.dropdown-menu .dropdown-menu {
    display: block !important;
    padding-top: 0px;
    padding-bottom: 8px;
}

.dropdown-submenu {
    border-bottom: 1px solid #666;
    margin-top: 5px;
}

.dropdown-item:focus, .dropdown-item:hover {
    color: #FFFFFF;
    background-color: #FF4500;
}

.dropdown-menu .dropdown-item div {
    padding-left: 10px;
    border-bottom: solid 1px #666;
}

.dropdown-submenu .dropdown-toggle {
    color: #FF4500;
    font-weight: bold;
}

.navbar {
    position: relative;
}

.navbar-collapse {
    position: absolute;
    top: 100%;
}

    .navbar-collapse.collapse.show {
        z-index: 1000;
    }

/*footerの縦線*/
.footer-links {
    display: flex;
    flex-wrap: wrap; /* 自動改行 */
    justify-content: center;
    list-style: none;
    padding: 0;
    margin: 0;
}

    .footer-links li {
        white-space: nowrap;
    }

        /* デフォルト：すべての | を表示 */
        .footer-links li:not(:last-child)::after {
            content: " | ";
            margin: 0 0.5em;
            color: #666;
        }

        .footer-links li a {
            display: inline-block;
            text-align: center;
            vertical-align: middle;
        }

#jtblogo2 {
    height: 60px;
}

.fw-bold.mb-2 {
    color: #FF4500 !important;
}

.dropdown-item div img {
    margin-right: 5px;
}
/* モバイル時だけ適用 */
@media (min-width: 992px) {
    #navbarNav .mobile {
        position: static;
        width: auto;
        background-color: transparent;
        /*display:block !important;*/
    }
}

@media (max-width: 991.98px) {
    .navbar-collapse {
        background-color: #fff; /* ← 背景色を付ける */
        box-shadow: 0 4px 10px rgba(0,0,0,.15); /* 見やすく */
    }

    .navbar-collapse {
        width: 25vw; /* 画面幅いっぱい */
        left: 0;
        right: 0;
    }
    /* navbar を基準にする */
    .navbar {
        position: relative;
        z-index: 1000;
    }
    /* メニューを右からスライド */
    .navbar-collapse {
        position: fixed; /* コンテンツの上に重ねる */
        top: 68px; /*メニューの開く始点*/
        right: 0;
        width: 70vw; /* メニュー幅 */
        height: 100vh; /* 画面全高 */
        background: #fff; /* 背景色 */
        transform: translateX(100%); /* 初期は右に隠す */
        /*transition: transform .3s ease;*/
        transition: none;
        z-index: 1050;
        overflow-y: auto;
    }

    .nav-item {
        border-bottom: 1px solid #666;
        margin-left: 0px;
    }

        .nav-item a {
            padding-left: 10px;
        }

    .dropdown-menu {
        border-radius: 0;
    }
}

@media (max-width:769px) {
    .navbar-collapse {
        width: 60vw;
        left: 0;
        right: 0;
    }
}

@media (max-width:767.98px) {
    .navbar-collapse {
        width: 50vw;
        left: 0;
        right: 0;
    }
}

/* ===== 携帯 ===== */

/* ================= 小さいスマホ向け（〜414px） ================= */
@media (max-width: 413px) {
    /* お問い合わせの後の | を消す */
    .footer-links li:nth-child(2)::after {
        content: "";
    }

    /* FAQ とご注意・ご案内を2行目に */
    /*.footer-links li:nth-child(3) {
                    flex-basis: 100%;
                    height: 0;
                }*/
}

/* ================= 小型スマホ〜タブレット（415px〜430px） ================= */
@media (min-width: 414px) and (max-width: 430px) {

    .footer-links li:nth-child(3)::after {
        content: "";
    }

    .footer-links li:nth-child(4)::after {
        content: " | ";
    }

    .footer-links li:nth-child(4) {
        flex-basis: auto;
        height: auto;
    }
}
<!-- /*モバイル専用CSS　ここまで*/ -->
<!-- /*PC専用CSS　ここから*/ -->

.jtb-logo-icon {
    height: 70px;
}

#header_pnCampaign {
    background-color: #e5e5e5;
}

    #header_pnCampaign a,
    #header_pnCampaign a:hover,
    #header_pnCampaign a:focus,
    #header_pnCampaign a:active {
        text-decoration: none;
        font-weight: normal;
    }

        #header_pnCampaign a b {
            font-weight: normal;
            font-size: 12px;
        }

#PC-header a {
    color: #333333;
}

a {
    text-decoration: none;
}

.tourleft, .tourleft1 {
    width: 260px;
    position: relative;
    top: -500px;
    background-color: white;
    padding: 0px;
    margin: 0px 0px 15px 0px;
    z-index: 1020;
}

    .tourleft h3, .tourleft1 h3 {
        margin: 0 0 0 0;
        padding: 17px 14px 16px 30px;
        height: 48px;
        font-size: 16px;
        font-weight: 600;
        text-indent: 0px;
        color: white !important;
        background: #d20920 none repeat scroll 0 0;
    }

#collapsePuropse, #collapseUSCities {
    margin: 0 0 0 0;
    border-left: 1px solid #c7c7c7;
    border-right: 1px solid #c7c7c7;
    border-bottom: 1px solid #c7c7c7;
}

#america_cities, #each_purpose {
    margin: 0px;
    padding: 8px;
    background: no-repeat;
}

    #america_cities ul li, #each_purpose ul li {
        padding: 0px 0px 0px 10px !important;
        margin: 10px;
    }

        #america_cities ul li div, #each_purpose ul li div {
            font-size: 18px !important;
            line-height: 1.8;
            color: #333333;
        }

.uscity_menu, .purpose_menu {
    background-position: 97% !important;
    background: bottom url(/contents/images/Look/Top/menu_arrow.png) no-repeat;
    border-bottom: 0.5px solid lightgray;
}

.tourleft .dropdown-toggle::after {
    display: none;
}

.crunchify-top {
    display: none;
    color: #fff !important;
    text-decoration: none;
    position: fixed;
    bottom: 5rem;
    right: 3rem;
    width: 3.2rem;
    height: 3.2rem;
    line-height: 3.2rem;
    font-size: 1.4rem;
    color: #fff;
    background-color: #d20920;
    text-decoration: none;
    border-radius: 3.2rem;
    text-align: center;
    cursor: pointer;
    z-index: 9999;
}

#uscity_other .show leftMenuFlag {
    line-height: 55px;
}


li.leftMenuFlag:last-child:before, li.leftMenuFlagLi:before {
    content: "";
    position: absolute;
    width: 0;
    height: 0;
    left: 0;
    border-top: 24px solid transparent;
    border-left: 0px solid white;
    border-bottom: 24px solid transparent;
    margin: -10px 0px 0 0px;
}

li.leftMenuFlag:first-child:after, li.leftMenuFlagLi:after {
    content: "";
    position: absolute;
    width: 0;
    height: 0;
    border-top: 23px solid transparent;
    border-left: 15px solid orangered;
    border-bottom: 23px solid transparent;
    margin: -3px 0px 0 0px;
    left: 260px;
    padding-left: 27.8px !important;
}

.dropdown-menu.pull-left {
    position: absolute;
    top: -43px !important;
    left: -28px !important;
    z-index: 1031;
    width: 280px;
    height: 47px;
    font-size: 14px;
    -webkit-box-shadow: 0 0px 0px rgba(0, 0, 0, .175);
    box-shadow: 0 0px 0px rgba(0, 0, 0, .175);
    background-color: transparent !important;
    border: 0px;
}

.tourlist ul, .tourleft1 ul {
    list-style-type: none;
    padding: 0px;
}

.pull-left {
    float: left !important;
}

.uscity_menu {
    position: relative;
}

/* 共通：初期非表示 */
.above-menu,
.side-menu {
    display: none;
    z-index: 1000;
}

    /* 表示状態 */
    .above-menu.show,
    .side-menu.show {
        display: block;
    }

.leftMenuArrow {
    font-size: 21px;
    font-weight: 600;
    color: orange;
    left: 200px;
    position: absolute;
    line-height: 52.2px;
}

<!-- CSS 全部-- >
/*footer*/
* {
    margin: 0;
    padding: 0;
    font-family: Meiryo, Helvetica, Arial, "Hiragino Kaku Gothic Pro", sans-serif;
    line-height: 1.3;
    text-decoration: none !important;
}

.home-footer {
    background: #f2f2f2;
    border-top: 5px solid #d20920;
}

.footer-title, .toppage-modal h3 {
    font-size: 13px;
    color: #464646;
    border-bottom: 1px solid #b7b7b7;
    padding-bottom: 10px;
    font-weight: bold;
    text-align: left;
}

.list-group ul li {
    list-style: none;
    line-height: 20px;
    font-size: 13px;
    color: #333;
}
/* 共通 */

/*boday*/
.toppage-wall-img {
    object-position: center center !important;
    height: 142px;
    width: 189px;
    object-fit: cover !important;
}

.toppage-wall-img-box {
    overflow: hidden;
}

.fancyhover img, .fhover .img-box .img-responsive {
    transition: transform .5s ease;
}

.fancyhover:hover img, .fhover:hover .img-box .img-responsive {
    transform: scale(1.18);
    opacity: 0.8;
}

.toppage-wall-box-title h3 span {
    line-height: 25px;
    font-weight: bold;
    font-size: 14px;
}

.toppage-wall-box a h3 {
    color: #337ab7 !important;
    font-weight: normal !important;
    font-size: 12px !important;
}

#mainTopicbox, #cyuumoku, #osusumesite {
    margin-top: 30px;
}

    #mainTopicbox .card.card-body {
        border: none;
        font-size: small;
    }

.toppage-subtitle_bar_center, .staticpage-subtitle_bar {
    /* background-color: #d20920 !important; */
    padding: 5px;
    color: #666666;
    /* color: white; */
    font-weight: Bold;
    font-size: 30px;
    margin-bottom: 10px;
    /* background: url(/Contents/images/Look/common/contents/icon-title.png); */
    padding-left: 35px !important;
    background-repeat: no-repeat;
    background-position: 1.5% 45%;
}

.home-footer a {
    color: #444444 !important;
}

.list-group {
    padding: 20px;
}

.footer-bottom-line {
    position: relative;
    bottom: 0px;
    height: auto;
    width: 100%;
    background-color: #464646;
    padding-top: 10px;
    padding-bottom: 10px;
    padding: 20px;
}

    .footer-bottom-line a {
        color: white !important;
    }

#header_pnCampaign a:link {
    color: #2e56a6;
}

a:hover span, a:focus span {
    color: #23527c;
}

a:link {
    color: #2e56a6;
}

#servicesDropdown-visit.dropdown-menu.show {
    list-style: none;
}

/*body end*/
@media (min-width:1025px) {
    .first-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/1916x540/Fuku2025_1916x540.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 540px;
        margin: 40px, 0px, 0px 0px;
    }

    .second-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/1916x540/mlb2024_1916x540.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 540px;
        margin: 40px, 0px, 0px 0px;
    }

    .third-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/1916x540/aurora2025_1916x540.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 540px;
        margin: 40px, 0px, 0px 0px;
    }

    .fourth-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/1916x540/Grandcircle2025_1916x540.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 540px;
        margin: 40px, 0px, 0px 0px;
    }

    /*.fifth-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/1916x540/Grandcircle2025_1916x540.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 540px;
        margin: 40px, 0px, 0px 0px;
    }*/


    body {
        /*padding-top: 133px;*/ /*後で調整*/
    }
}

@media (max-width:1024px) {
    .first-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/1024x540/Fuku2025_1024x540.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 540px;
        margin: 0 auto;
    }

    .second-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/1024x540/mlb2024_1024x540.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 540px;
        margin: 0 auto;
    }

    .third-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/1024x540/aurora2025_1024x540.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 540px;
        margin: 0 auto;
    }

    .fourth-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/1024x540/Grandcircle2025_1024x540.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 540px;
        margin: 0 auto;
    }

    /*.fifth-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/1024x540/niagara_1024x540.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 540px;
        margin: 0 auto;
    }*/


    body {
        /*padding-top: 110px;*/ /*後で調整*/
    }
}

@media (max-width:768px) {
    .first-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/768x300/Fuku2025_768x300.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 300px;
        margin: 0 auto;
    }

    .second-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/768x300/mlb2024_768x300.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 300px;
        margin: 0 auto;
    }

    .third-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/768x300/aurora2025_768x300.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 300px;
        margin: 0 auto;
    }

    .fourth-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/768x300/Grandcircle2025_768x300.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 300px;
        margin: 0 auto;
    }

    /*.fifth-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/768x300/niagara_768x300.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 300px;
        margin: 0 auto;
    }*/


    body {
        /*padding-top: 87px;*/ /*後で調整*/
    }

    h1 {
        font-size: 2em;
    }
}

@media (max-width:415px) {
    .first-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/415x300/Fuku2025_415x300.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 300px;
        margin: 0 auto;
    }

    .second-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/415x300/mlb2024_415x300.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 300px;
        margin: 0 auto;
    }

    .third-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/415x300/aurora2025_415x300.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 300px;
        margin: 0 auto;
    }

    .fourth-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/415x300/Grandcircle2025_415x300.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 300px;
        margin: 0 auto;
    }

    /*.fifth-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/415x300/niagara_415x300.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 300px;
        margin: 0 auto;
    }*/
}

@media (max-width:376px) {
    .first-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/375x250/Fuku2025_375x250.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 250px;
        margin: 0 auto;
    }

    .second-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/375x250/mlb2024_375x250.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 250px;
        margin: 0 auto;
    }

    .third-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/375x250/aurora2025_375x250.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 250px;
        margin: 0 auto;
    }

    .fourth-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/375x250/Grandcircle2025_375x250.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 300px;
        margin: 0 auto;
    }

   /* .fifth-slide {
        background-position: center center !important;
        background-image: url(/Contents/images/slide_images/375x250/niagara_375x250.jpg);
        background-repeat: no-repeat;
        width: 100%;
        height: 250px;
        margin: 0 auto;
    }*/

    .navbar-brand {
        padding-top: 0px;
        padding-bottom: 0px;
        margin-right: 0px;
    }
}
<!-- /*PC専用CSS　ここから*/ -->