body {
        font-family: メイリオ;
}
* {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
}
@media screen and (min-width: 1920px) {
        /*header top */
        .header_img {
            width: 100%;
            height: 685px;
            object-fit: cover;
        }
        .header_top {
            position: relative;
        }
        .header_top h2 {
            position: absolute;
            color: black;
            bottom: 0;
            right: 5px;
            font-size: 60px;
            font-weight: lighter;
        }
        /*フッター横線*/
        .title {
            position: relative;
            border-top: 3px solid #658DAA;
        }
        .title .contact {
            position: absolute;
            color: black;
            top: 0px;
            right: 0;
            font-weight:  bold;
        }
        /*footer start*/
        .title p {
            padding-top: 10px;
            font-size:20px;
            padding-left: 5px;
        }
        .title a {
            text-decoration: none;
            color: black;
            font-size: 15px;
            padding-bottom: 10px;
            padding-left: 5px;
        }
        .contact {
            padding-right: 5px;
        }
        .footer {
            margin-top: 60px;
        }
        /*戻るボタン*/
        html {
            scroll-behavior: smooth;
        }
        .startbtn {
            position: fixed;
            bottom: 160px;
            right: 24px;
            width: 48px;
            height: 48px;
            text-decoration: none;
            background-color: #0261a5;
            display: block;
            text-align: center;
            border-radius: 24px;
            z-index: 100;
        }
        .startbtn::before {
            content: '\f062';
            font-family: 'Font Awesome 6 Free';
            font-size: 30px;
            font-weight: 900;
            color: #fff;
            line-height: 48px;
            z-index: 100;
        }
        /*飛行機画像*/
        .airplane_img {
            width: 95px;
            padding-top: 15px;
        }
        .airplane_line{
            position: absolute;
            border-top: 5px dashed #658DAA;
            width: 95%;
            left: 80px;
            bottom: 40px;
        }
        .airplane {
            position: relative;
            padding-top: 50px;
        }
        /*空港名・地区名*/
        .airplane h2 {
            position: absolute;
            padding-left: 110px;
            font-size: 25px;
            font-weight: lighter;
        }
        /*四角の中*/
        .item {
            position: relative;
            box-sizing: border-box;
            background: white;
            box-shadow: 0 0 10px gray;
            border-radius: 17px;
            margin-bottom: 45px;
            margin-top: 25px;
            width: 95%;
            left: 35px;
        }
        .item img {
            width: 15%;
            height: 200px;
            object-fit: cover;
            margin-bottom: 30px;
            margin-left: 40px;
            margin-top: 20px;
        }
        .airplane_list {
            font-size: 40px;
            padding-bottom: 10px;
        }
        .sponsors_list {
            font-size: 40px;
            padding-bottom: 0;
        }
        .item h3 {
            font-size: 22px;
            padding-bottom: 5px;
            font-weight: lighter;
        }
        .item h4 {
            font-size: 19px;
            font-weight: lighter;
            padding-bottom: 20px;
        }
        .item p {
            font-size: 19px;
            color: black;
            text-decoration: none;
        }
        .item_two {
            position: absolute;
            bottom: 50px;
            margin-left: 20%;
        }
        .item a {
            text-decoration: none;
            color: black;
        }
        .item .change:hover {
            text-decoration: underline;
            color: #0261a5;
        }
        /*ボタン*/
        .btn {
            border-radius: 5px;
            background-color: #658DAA;
            padding: 15px;
            text-decoration: none;
            color: black;
            font-weight: 600;
            font-size: 22px;
        }
        .inline_block_button {
            margin-top: 15px;
            display:flex;
            justify-content:center;
        }
        .inline_block_button :hover {
            color: gray;
            font-size: 23px;
            font-weight: bold;
        }
}
@media screen and (min-width: 1201px) and (max-width: 1919px) {
        /*header top */
        .header_img {
            width: 100%;
            height: 485px;
            object-fit: cover;
        }
        .header_top {
            position: relative;
        }
        .header_top h2 {
            position: absolute;
            color: black;
            bottom: 0;
            right: 5px;
            font-size: 50px;
            font-weight: lighter;
        }
        /*フッター横線*/
        .title {
            position: relative;
            border-top: 3px solid #658DAA;
        }
        .title .contact {
            position: absolute;
            color: black;
            top: 0px;
            right: 0;
            font-weight:  bold;
        }
        /*footer start*/
        .title p {
            padding-top: 10px;
            font-size:20px;
            padding-left: 5px;
        }
        .title a {
            text-decoration: none;
            color: black;
            font-size: 15px;
            padding-bottom: 10px;
            padding-left: 5px;
        }
        .contact {
            padding-right: 5px;
        }
        .footer {
            margin-top: 60px;
        }
        /*戻るボタン*/
        html {
            scroll-behavior: smooth;
        }
        .startbtn {
            position: fixed;
            bottom: 160px;
            right: 24px;
            width: 48px;
            height: 48px;
            text-decoration: none;
            background-color: #0261a5;
            display: block;
            text-align: center;
            border-radius: 24px;
            z-index: 100;
        }
        .startbtn::before {
            content: '\f062';
            font-family: 'Font Awesome 6 Free';
            font-size: 30px;
            font-weight: 900;
            color: #fff;
            line-height: 48px;
            z-index: 100;
        }
        /*飛行機画像*/
        .airplane_img {
            width: 80px;
            padding-top: 15px;
        }
        .airplane_line{
            position: absolute;
            border-top: 5px dashed #658DAA;
            width: 85%;
            left: 80px;
            bottom: 40px;
        }
        .airplane {
            position: relative;
            padding-top: 50px;
        }
        /*空港名・地区名*/
        .airplane h2 {
            position: absolute;
            padding-left: 90px;
            font-size: 25px;
            font-weight: lighter;
        }
        /*四角の中*/
        .item {
            position: relative;
            box-sizing: border-box;
            background: white;
            box-shadow: 0 0 10px gray;
            border-radius: 17px;
            margin-bottom: 45px;
            margin-top: 25px;
            width: 95%;
            left: 15px;
        }
        .item img {
            width: 15%;
            height: 174px;
            object-fit: cover;
            margin-bottom: 30px;
            margin-left: 40px;
            margin-top: 20px;
        }
        .airplane_list {
            font-size: 28px;
            padding-bottom: 10px;
        }
        .sponsors_list {
            font-size: 28px;
            padding-bottom: 0;
        }
        .item h3 {
            font-size: 22px;
            padding-bottom: 5px;
            font-weight: lighter;
        }
        .item h4 {
            font-size: 19px;
            font-weight: lighter;
            padding-bottom: 20px;
        }
        .item p {
            font-size: 19px;
            color: black;
            text-decoration: none;
        }
        .item_two {
            position: absolute;
            bottom: 35px;
            margin-left: 20%;
        }
        .item a {
            text-decoration: none;
            color: black;
        }
        .item .change:hover {
            text-decoration: underline;
            color: #0261a5;
        }
        /*ボタン*/
        .btn {
            border-radius: 5px;
            background-color: #658DAA;
            padding: 15px;
            text-decoration: none;
            color: black;
            font-weight: 600;
            font-size: 22px;
        }
        .inline_block_button {
            margin-top: 15px;
            display:flex;
            justify-content:center;
        }
        .inline_block_button :hover {
            color: gray;
            font-size: 23px;
            font-weight: bold;
        }
    }
    @media screen and (min-width: 961px) and (max-width: 1200px) {
        /*header top */
        .header_img {
            width: 100%;
            height: 445px;
            object-fit: cover;
        }
        .header_top {
            position: relative;
            box-sizing: border-box;
            -moz-box-sizing: border-box;
            width: 100%;
        }
        .header_top h2 {
            position: absolute;
            color: black;
            bottom: 0;
            right: 5px;
            font-size: 45px;
            font-weight: lighter;
        }
        /*フッター横線*/
        .title {
            position: relative;
            border-top: 3px solid #658DAA;
        }
        .title .contact {
            position: absolute;
            color: black;
            top: 0px;
            right: 0;
            font-weight:  bold;
        }
        /*footer start*/
        .title p {
            padding-top: 10px;
            font-size:20px;
            padding-left: 5px;
        }
        .title a {
            text-decoration: none;
            color: black;
            font-size: 15px;
            padding-bottom: 10px;
            padding-left: 5px;
        }
        .contact {
            padding-right: 5px;
        }
        .footer {
            margin-top: 60px;
        }
        /*戻るボタン*/
        html {
            scroll-behavior: smooth;
        }
        .startbtn {
            position: fixed;
            bottom: 110px;
            right: 24px;
            width: 48px;
            height: 48px;
            text-decoration: none;
            background-color: #0261a5;
            display: block;
            text-align: center;
            border-radius: 24px;
            z-index: 100;
        }
        .startbtn::before {
            content: '\f062';
            font-family: 'Font Awesome 6 Free';
            font-size: 30px;
            font-weight: 900;
            color: #fff;
            line-height: 48px;
            z-index: 100;
        }
        /*飛行機画像*/
        .airplane_img {
            width: 70px;
            padding-top: 15px;
        }
        .airplane_line{
            position: absolute;
            border-top: 5px dashed #658DAA;
            width: 94%;
            left: 80px;
            bottom: 40px;
        }
        .airplane {
            position: relative;
            padding-top: 50px;
            box-sizing: border-box;
            -moz-box-sizing: border-box;
            width: 100%;
        }
        /*空港名・地区名*/
        .airplane h2 {
            position: absolute;
            padding-left: 90px;
            font-size: 20px;
            font-weight: lighter;
        }
        /*四角の中*/
        .item {
            position: relative;
            box-sizing: border-box;
            background: white;
            box-shadow: 0 0 10px gray;
            border-radius: 17px;
            margin-bottom: 45px;
            margin-top: 25px;
            width: 95%;
            left: 35px;
        }
        .item img {
            width: 15%;
            height: 174px;
            object-fit: cover;
            margin-bottom: 30px;
            margin-left: 40px;
            margin-top: 20px;
        }
        .airplane_list {
            font-size: 28px;
            padding-bottom: 10px;
        }
        .sponsors_list {
            font-size: 28px;
            padding-bottom: 0;
        }
        .item h3 {
            font-size: 22px;
            padding-bottom: 5px;
            font-weight: lighter;
        }
        .item h4 {
            font-size: 19px;
            font-weight: lighter;
            padding-bottom: 20px;
        }
        .item p {
            font-size: 19px;
            color: black;
            text-decoration: none;
        }
        .item_two {
            position: absolute;
            bottom: 20px;
            margin-left: 20%;
        }
        .item a {
            text-decoration: none;
            color: black;
        }
        .item .change:hover {
            text-decoration: underline;
            color: #0261a5;
        }
        /*ボタン*/
        .btn {
            border-radius: 5px;
            background-color: #658DAA;
            padding: 15px;
            text-decoration: none;
            color: black;
            font-weight: 600;
            font-size: 22px;
        }
        .inline_block_button {
            margin-top: 15px;
            display:flex;
            justify-content:center;
        }
        .inline_block_button :hover {
            color: gray;
            font-size: 23px;
            font-weight: bold;
        }
}
@media screen and (min-width: 601px) and (max-width: 960px) {
        /*header top */
        .header_img {
            width: 100%;
            height: 445px;
            object-fit: cover;
        }
        .header_top {
            position: relative;
            box-sizing: border-box;
            -moz-box-sizing: border-box;
            width: 100%;
        }
        .header_top h2 {
            position: absolute;
            color: black;
            bottom: 0;
            right: 5px;
            font-size: 40px;
            font-weight: lighter;
        }
        /*フッター横線*/
        .title {
            position: relative;
            border-top: 3px solid #658DAA;
        }
        .title .contact {
            position: absolute;
            color: black;
            top: 0px;
            right: 0;
            font-weight:  bold;
        }
        /*footer start*/
        .title p {
            padding-top: 10px;
            font-size:20px;
            padding-left: 5px;
        }
        .title a {
            text-decoration: none;
            color: black;
            font-size: 15px;
            padding-bottom: 10px;
            padding-left: 5px;
        }
        .contact {
            padding-right: 5px;
        }
        .footer {
            margin-top: 60px;
        }
        /*戻るボタン*/
        html {
            scroll-behavior: smooth;
        }
        .startbtn {
            position: fixed;
            bottom: 110px;
            right: 24px;
            width: 48px;
            height: 48px;
            text-decoration: none;
            background-color: #0261a5;
            display: block;
            text-align: center;
            border-radius: 24px;
            z-index: 100;
        }
        .startbtn::before {
            content: '\f062';
            font-family: 'Font Awesome 6 Free';
            font-size: 30px;
            font-weight: 900;
            color: #fff;
            line-height: 48px;
            z-index: 100;
        }
        /*飛行機画像*/
        .airplane_img {
            width: 70px;
            padding-top: 15px;
        }
        .airplane_line{
            position: absolute;
            border-top: 5px dashed #658DAA;
            width: 85%;
            left: 80px;
            bottom: 40px;
        }
        .airplane {
            position: relative;
            padding-top: 50px;
        }
        /*空港名・地区名*/
        .airplane h2 {
            position: absolute;
            padding-left: 90px;
            font-size: 25px;
            font-weight: lighter;
        }
        /*四角の中*/
        .item {
            position: relative;
            box-sizing: border-box;
            background: white;
            box-shadow: 0 0 10px gray;
            border-radius: 17px;
            margin-bottom: 45px;
            margin-top: 25px;
            width: 95%;
            left: 20px;
        }
        .item img {
            width: 15%;
            height: 174px;
            object-fit: cover;
            margin-bottom: 30px;
            margin-left: 15px;
            margin-top: 20px;
        }
        .airplane_list {
            font-size: 28px;
            padding-bottom: 10px;
        }
        .sponsors_list {
            font-size: 28px;
            padding-bottom: 0;
        }
        .item h3 {
            font-size: 22px;
            padding-bottom: 5px;
            font-weight: lighter;
        }
        .item h4 {
            font-size: 19px;
            font-weight: lighter;
            padding-bottom: 20px;
        }
        .item p {
            font-size: 19px;
            color: black;
            text-decoration: none;
        }
        .item_two {
            position: absolute;
            bottom: 15px;
            margin-left: 20%;
        }
        .item a {
            text-decoration: none;
            color: black;
        }
        .item .change:hover {
            text-decoration: underline;
            color: #0261a5;
        }
        /*ボタン*/
        .btn {
            border-radius: 5px;
            background-color: #658DAA;
            padding: 15px;
            text-decoration: none;
            color: black;
            font-weight: 600;
            font-size: 22px;
        }
        .inline_block_button {
            margin-top: 15px;
            display:flex;
            justify-content:center;
        }
        .inline_block_button :hover {
            color: gray;
            font-size: 20px;
            font-weight: bold;
        }
}
@media screen and (max-width: 600px) {
        /*header top */
        .header_img {
            width: 100%;
            height: 205px;
            object-fit: cover;
        }
        .header_top {
            position: relative;
        }
        .header_top h2 {
            position: absolute;
            color: black;
            bottom: 5px;
            right: 5px;
            font-size: 20px;
            font-weight: lighter;
        }
        /* sp-nav(ナビ)=================================== */
        .sp-nav {
            position: fixed;
            right: -100%; /*ハンバーガーがクリックされる前はWindow右側に隠す*/    
            top: 0;    
            width: 40%; /* 出てくるスライドメニューの幅 */    
            height: 100vh;
            background-color: #B4CF9E;
            transition: all 0.5s;
            z-index: 200;    
            overflow-y: auto; /* メニューが多くなったらスクロールできるように */
            opacity: 0.9;
        }
        /*フッター横線*/
        .title {
            position: relative;
            border-top: 3px solid #658DAA;
        }
        .title .contact {
            position: absolute;
            color: black;
            top: 0px;
            right: 0;
            font-weight:  bold;
        }
        /*footer start*/
        .footer p {
            font-size: 10px;
            padding-top: 10px;
            margin-left: 5px;
        }
        .title a {
            text-decoration: none;
            color: black;
            font-size: 5px;
            padding-bottom: 10px;
            margin-left: 5px;
        }
        .contact {
            margin-right: 10px;
        }
        .footer {
            margin-top: 20px;
        }
        /*戻るボタン*/
        html {
            scroll-behavior: smooth;
        }
        .startbtn {
            position: fixed;
            bottom: 110px;
            right: 20px;
            width: 28px;
            height: 28px;
            text-decoration: none;
            background-color: #0261a5;
            display: block;
            text-align: center;
            border-radius: 24px;
            z-index: 100;
        }
        .startbtn::before {
            content: '\f062';
            font-family: 'Font Awesome 6 Free';
            font-size: 25px;
            font-weight: 900;
            color: #fff;
            line-height: 28px;
            z-index: 100;
        }
        /*飛行機画像*/
        .airplane_img {
            width: 40px;
            padding-top: 10px;
        }
        .airplane_line{
            position: absolute;
            border-top: 5px dashed #658DAA;
            width: 85%;
            left: 45px;
            bottom: 25px;
        }
        .airplane {
            position: relative;
            padding-top: 30px;
        }
        /*空港名・地区名*/
        .airplane h2 {
            position: absolute;
            padding-left: 45px;
            font-size: 12px;
            font-weight: lighter;
        }
        /*四角の中*/
        .item {
            position: relative;
            box-sizing: border-box;
            background: white;
            box-shadow: 0 0 10px gray;
            border-radius: 17px;
            margin-bottom: 25px;
            margin-top: 25px;
            width: 95%;
            left: 10px;
        }
        .item img {
            width: 15%;
            height: 80px;
            object-fit: cover;
            margin-bottom: 30px;
            margin-left: 15px;
            margin-top: 20px;;
        }
        .airplane_list {
            font-size: 28px;
            padding-bottom: 10px;
        }
        .sponsors_list {
            font-size: 28px;
            padding-bottom: 0;
        }
        .item h3 {
            font-size: 13px;
            padding-bottom: 5px;
            font-weight: lighter;
        }
        .item h4 {
            font-size: 12px;
            font-weight: lighter;
            padding-bottom: 20px;
        }
        .item p {
            font-size: 8px;
            color: black;
            text-decoration: none;
        }
        .item_two {
            position: absolute;
            bottom: 8px;
            margin-left: 20%;
        }
        .item a {
            text-decoration: none;
            color: black;
        }
        .item .change:hover {
            text-decoration: underline;
            color: #0261a5;
        }
        /*ボタン*/
        .btn {
            border-radius: 5px;
            background-color: #658DAA;
            padding: 15px;
            text-decoration: none;
            color: black;
            font-weight: 200;
            font-size: 10px;
        }
        .inline_block_button {
            margin-top: 10px;
            display:flex;
            justify-content:center;
        }
        .inline_block_button :hover {
            color: gray;
            font-size: 10px;
            font-weight: bold;
        }
}