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: 16px;
        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: 8px;
        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: 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: 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;
    }
}