@charset "UTF-8";

/* set variables */
:root {
    --mainColor: #3ea4b9;
    --subColor: #A36F7A;
    --navColor: ;
    --bgColorGlay: #e8e8e8;
    --rightColor: #fff;
    --txtColor: #231815;
    --linkColor: #000;
    --borderColor: #231815;
    --min : "Noto Serif JP", serif;

    --textNormal: 16px;
    --textMiddle: 18px;
    --textMiddle2: 20px;
    --textBig: 24px;
    --textLarge: 30px;
    --textSmall: 14px;

    --gap: 100px;
    --gaps: 30px;
    --gap_sp: 30px;
    --sectionPadding: 10rem;
    --sectionPadding_sp: 3rem;
    --contentWidth: 1500px;
    --innerWidth: 1200px;
}
body {
    width: 100%;
    font-size: 10px;
    color: var(--txtColor);
    position: relative;
    font-family: "Noto Sans JP", sans-serif;
    overflow-x: hidden;
    background-color: #f5f5f5;
}

/* PC用コンテナ */
@media screen and (min-width: 1169px) {
    .main-container {
        max-width: 1700px;
        margin: 0 auto;
        background-color: #ffffff !important;
        box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
        position: relative;
        z-index: 1;
    }
    
    .main-container::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: #ffffff;
        z-index: -1;
    }
}

/* コンテンツエリアの背景を確実に白にする */
#container,
main,
section:not(#top_news , #products_bg , .gas_02),
.top_company_bottom,
#footer {
    background-color: #ffffff !important;
}

/* モバイル表示でも確実に白背景 */
@media screen and (max-width: 1168px) {
    #container,
    main,
    section:not(#top_news , #products_bg , .gas_02),
    .top_company_bottom,
    #footer {
        background-color: #ffffff !important;
    }
}

body.menu-open {
    overflow: hidden;
}
p {
    line-height: 1.8;

}
h2 , h3 , p {
    margin-top: 0;
    margin-bottom: 0;
}
.p_center {
    text-align: center;
}
.p_bold {
    font-weight: 600;
}
.p_right {
    text-align: right;
}
.br-sp {
    display: none;
}
a img {
    transition: 0.2s;
}
a:hover img {
    opacity: 0.6;
}
.clearfix::after {
	clear: both;
	display: block;
	content: "";
	height: 0;
	width: 0;
}
.flt_right {
    float: right;
}
.flt_left {
    float: left;
}

/* PC . SP 切り替え */
@media screen and (max-width: 999px) {
    .sp_none {
        display: none;
    }
    img {
        max-width: 100%;
        height: auto;
    }
}
@media screen and (min-width: 1000px) {
    .pc_none {
        display: none;
    }
}


.wrap {
    width: 100%;
    max-width: var(--contentWidth);
    margin-left: auto;
    margin-right: auto;
}
.wrap_s {
    width: 100%;
    max-width: var(--innerWidth);
    margin-left: auto;
    margin-right: auto;
}
.mt_10 {
    margin-top: 1rem;
}
.mt_20 {
    margin-top: 2rem;
}
.mt_30 {
    margin-top: 3rem;
}
.mt_40 {
    margin-top: 4rem;
}
.mt_50 {
    margin-top: 5rem;
}
.mt_100 {
    margin-top: 10rem;
}
.mb_0 {
    margin-bottom: 0 !important;
}
.mb_10 {
    margin-bottom: 1rem;
}
.mb_20 {
    margin-bottom: 2rem;
}
.mb_30 {
    margin-bottom: 3rem;
}
.mb_40 {
    margin-bottom: 3rem;
}
.mb_50 {
    margin-bottom: 5rem;
}
.p12 {
    font-size: 12px;
    line-height: 200%;
}
.p14 {
    font-size: 14px;
    line-height: 200%;
}
.p16 {
    font-size: 16px;
    line-height: 200%;
}
.p18 {
    font-size: 18px;
    line-height: 200%;
}
.p20 {
    font-size: 20px;
    line-height: 180%;
}
.p22 {
    font-size: 22px;
    line-height: 200%;
}
.p26 {
    font-size: 26px;
    line-height: 180%;
}
.p30 {
    font-size: 30px;
    line-height: 180%;
}
.p36 {
    font-size: 36px;
    line-height: 180%;
}
.p40 {
    font-size: 40px;
    line-height: 150%;
}
.p50 {
    font-size: 50px;
    line-height: 150%;
}
.p100{
    font-size: 100px;
    line-height: 150%;
}
.p_light {
    color: var(--rightColor);
}
.bg_01 {
    background-color: var(--mainColor);
}
.sec_padding {
    padding-top: var(--gap);
    padding-bottom: var(--gap);
}

@media screen and (max-width: 1519px) {
    .wrap  {
        width: auto;
        max-width: auto;
        margin-left: 20px;
        margin-right: 20px;
    }
    .wrap_s  {
        width: auto;
        max-width: auto;
    }
}
@media screen and (max-width: 768px) {
    .mb_20 {
        margin-bottom: 1rem;
    }
    .mb_30 {
        margin-bottom: 1rem;
    }
    .mb_40 {
        margin-bottom: 2rem;
    }
    .mb_50 {
        margin-bottom: 3rem;
    }
    .p18 {
        font-size: 16px;
        line-height: 200%;
    }
    .p20 {
        font-size: 18px;
        line-height: 180%;
    }
    .p22 {
        font-size: 18px;
        line-height: 200%;
    }
    .p26 {
        font-size: 20px;
        line-height: 180%;
    }
    .p30 {
        font-size: 22px;
        line-height: 180%;
    }
    .p36 {
        font-size: 24px;
        line-height: 180%;
    }
    .p40 {
        font-size: 28px;
        line-height: 150%;
    }
    .p50 {
        font-size: 30px;
        line-height: 150%;
    }
    .p100{
        font-size: 38px;
        line-height: 150%;
    }
    .sec_padding {
        padding-top: 3rem;
        padding-bottom: 3rem;
    }
}
@media screen and (max-width: 500px) {
    .p18 {
        font-size: 16px;
        line-height: 200%;
    }
    .p20 {
        font-size: 16px;
        line-height: 180%;
    }
    .p22 {
        font-size: 18px;
        line-height: 200%;
    }
    .p26 {
        font-size: 18px;
        line-height: 180%;
    }
    .p30 {
        font-size: 22px;
        line-height: 180%;
    }
    .p36 {
        font-size: 24px;
        line-height: 180%;
    }
    .p40 {
        font-size: 24px;
        line-height: 150%;
    }
    .p50 {
        font-size: 24px;
        line-height: 150%;
    }
}
/* ヘッダー */
#header {
    
}
#header .header_top {
    padding: 30px 20px;
    display: flex;
    width: 100%;
    justify-content: space-between;
    align-items: center;
}
#header nav {
    background-color: var(--mainColor);
    padding: 15px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 30px;
}
#header nav a {
    position: relative;
    text-align: center;
    color: #fff;
    font-weight: bold;
    text-decoration: none;
    line-height: 150%;
    padding: 10px 0;
    transition: 0.3s;
}
#header nav a::after {
    content: "";
    display: block;
    background-color: #fff;
    width: 1px;
    height: 100%;
    position: absolute;
    right: 0;
    margin-right: -15px;
    top: 0;
}
#header nav span {
    display: block;
    font-size: 55%;
}
#header nav a:hover {
    color: #5ed9ea;
}
#header nav a:last-child::after {
    display: none;
}
#header h1 {
    width: 400px;
}
#header .header-right {
    display: flex;
    flex: 1;
    justify-content: right;
    align-items: center;
    gap: 10px;
}
#header .tel {
    text-align: center;
    font-weight: bolder;
}
#header .tel span {
    display: block;
}
#header .telnom a {
    color: var(--mainColor);
    font-size: 28px;
    line-height: 120%;
    text-decoration: none;
}

/* ハンバーガーメニュー */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    width: 30px;
    height: 24px;
    justify-content: space-between;
}

.hamburger span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--mainColor);
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* モバイルメニュー */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu-content {
    position: absolute;
    top: 0;
    right: -300px;
    width: 300px;
    height: 100vh;
    background-color: white;
    transition: right 0.3s ease;
    overflow-y: auto;
}

.mobile-menu.active .mobile-menu-content {
    right: 0;
}

.mobile-menu-header {
    padding: 20px;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mobile-menu-close {
    font-size: 24px;
    cursor: pointer;
    color: var(--mainColor);
}

.mobile-menu-nav {
    padding: 20px 0;
}

.mobile-menu-nav a {
    display: block;
    padding: 15px 20px;
    color: var(--txtColor);
    text-decoration: none;
    border-bottom: 1px solid #eee;
    font-weight: bold;
}

.mobile-menu-nav a:hover {
    background-color: #f5f5f5;
    color: var(--mainColor);
}

.mobile-menu-nav span {
    display: block;
    font-size: 12px;
    color: #666;
    margin-top: 5px;
}

.mobile-menu-contact {
    padding: 20px;
    border-top: 2px solid var(--mainColor);
}

.mobile-menu-tel {
    text-align: center;
    margin-bottom: 15px;
}

.mobile-menu-tel a {
    color: var(--mainColor);
    font-size: 24px;
    font-weight: bold;
    text-decoration: none;
}

.mobile-menu-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.mobile-menu-buttons img {
    width: 120px;
}

@media screen and (max-width: 1168px) {
    #header .header_top {
        padding: 15px 20px;
    }
    
    #header h1 {
        width: 200px;
    }
    
    #header .header-right {
        display: none !important;
    }
    
    #header nav {
        display: none !important;
    }
    
    .hamburger {
        display: flex !important;
    }
}

@media screen and (max-width: 768px) {
    #header .header_top {
        padding: 15px 20px;
    }
    
    #header h1 {
        width: 200px;
    }
}

/* footer */

#footer {
    padding-top: 100px;
    text-align: center;
}
.footer_bottom {
    line-height: 0;
}
.footer_bottom img {
    width: 100%;
    height: auto;
}
.footer_sns {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}
.footer_nav {
    list-style: none;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
}
.footer_nav li {
    background-image: url(../img/footer_arrow.png);
    background-position: left center;
    background-repeat: no-repeat;
    background-size: 20px auto;
    padding-left: 25px;
    font-weight: bold;
}
.footer_nav li a {
    color: var(--txtColor);
    text-decoration: none;
    transition: 0.3s;
}
.footer_nav li a:hover {
    color: var(--mainColor);
}
.footer_nav li:first-child {
    padding-left: 0;
    background-image: none;
    font-size: 130%;
    color: var(--mainColor);
}
#footer .copy {
    background-color: var(--mainColor);
    color: #fff;
    padding: 20px 0;
}

/* フッターの電話番号リンク */
#footer a[href^="tel:"] {
    color: inherit;
    text-decoration: none;
}
@media screen and (max-width: 798px) {
}

/* kv */
#kv {
    text-align: center;
    line-height: 0;
}
#kv img {
    width: 100%;
    height: auto;
}

/* main */
#main {
    width: 100%;
}
/* 共通で使いそうなcss */
.blue_text{
    color: var(--mainColor);
}
.blue_bg{
    background-color: var(--mainColor);
}
.oswald{
    font-family: "Oswald", sans-serif;
    font-weight: 400;
}


/* トップページ */
.top_sec_padding {
    padding: 50px 0;
}
.h2_top {
    text-align: center;
    font-family: "Oswald", sans-serif;
    font-weight: 400;
    color: var(--mainColor);
    font-size: 50px;
    line-height: 150%;
}
.h2_top span {
    display: block;
    color: var(--txtColor);
    font-weight: 600;
    font-size: 14px;
    line-height: 150%;
}
#top_news {
    background-color: var(--bgColorGlay);
    background-image: url(../img/top_news_img01.png);
    background-size: 300px auto;
    background-repeat: no-repeat;
    background-position: center left 50px;
}
#top_news dl {
    display: flex;
    margin: 0 auto;
    width: 100%;
    max-width: 800px;
    gap: 0;
    flex-wrap: wrap;
}
#top_news dt {
    width: 180px;
}
#top_news dd {
    width: calc(100% - 180px);
}
#top_news a {
    color: var(--txtColor);
}
#top_news a:hover {
    text-decoration: none;
}
#top_examples {   
}

/* 施工実績スライダー */
.scroll_img {
    width: 100%;
    max-width: 1700px;
    margin: 0 auto;
    overflow: hidden;
    padding: 30px 0;
    box-sizing: border-box;
}

@media screen and (max-width: 1168px) {
    .scroll_img {
        width: 100vw;
        position: relative;
        left: 50%;
        right: 50%;
        margin-left: -50vw;
        margin-right: -50vw;
        max-width: none;
    }
}

.scroll_img .slider {
    display: flex;
    gap: 0;
    will-change: transform;
}

.scroll_img .slider > div {
    width: 400px;
    flex-shrink: 0;
}

.scroll_img .slider a {
    display: block;
    width: 100%;
    height: 300px;
    text-decoration: none;
    overflow: hidden;
    position: relative;
}

.scroll_img .slider img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    transform-origin: center center;
}

.scroll_img .slider a:hover img {
    transform: scale(1.1);
}

@media screen and (max-width: 768px) {
    .scroll_img .slider > div {
        width: 300px;
    }
    
    .scroll_img .slider a {
        height: 225px;
    }
    
    .scroll_img .slider img {
        height: 225px;
    }
}




/* ページトップへ戻るボタン */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 80px;
    height: 80px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.scroll-to-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-to-top:hover {
    transform: translateY(-2px);
}

.scroll-to-top img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all 0.3s ease;
}

@media screen and (max-width: 768px) {
    .scroll-to-top {
        width: 60px;
        height: 60px;
        bottom: 20px;
        right: 20px;
    }
}
#top_contents {
    background-image: url(../img/top_contents_bg.jpg);
    background-position: center top;
    background-repeat: no-repeat;
    background-size: 100% auto;
    padding-top: 100px;
}
.top_contents_wrap {
    background-color: #fff;
    width: 100%;
    max-width: var(--contentWidth);
    margin: 0 auto;
    padding: 50px 0 100px 0;
    position: relative;
    z-index: 1;
}
.top_contents_wrap::after {
    content: "";
    display: block;
    width: 180px;
    height: 250px;
    background-image: url(../img/top_contents_img00.png);
    background-repeat: no-repeat;
    background-size: contain;
    background-position: center top;
    position: absolute;
    z-index: 2;
    top: 0;
    right: 50px;
    margin-top: -50px;
}
#top_contents ul {
    display: flex;
    flex-wrap: wrap;
    margin: 0 50px;
    gap: 50px;
    list-style: none;
    align-items: flex-start;
}
#top_contents li {
   width: calc((100% - 100px) / 3);
}
#top_contents li div {
    font-weight: bold;
    display: flex;
    padding: 0 10px;
}
#top_contents li div p {
    width: 50%;
}
#top_contents li div p:last-child {
    text-align: right;
    font-size: 75%;
}
#top_contents li img {
    width: 100%;
    height: auto;
    margin: 10px 0;
}
#top_contents li a {
    color: var(--txtColor);
    text-decoration: none;
    transition: 0.3s;
}
#top_contents li a:hover {
    color: var(--mainColor);
}
.top_company_top {
    background-image: url(../img/top_profile_img01.jpg);
    background-position: center top;
    background-size: cover;
}
.top_company_top div {
    margin-left: 0;
    margin-right: auto;
    width: 50%;
    min-width: 600px;
    padding: 200px 0;
    text-align: center;
    background-image: url(../img/top_profile_img02.png);
    background-position: right top;  
    background-size: 100% 100%;
}
.top_company_top a {
    text-decoration: none;
}
.top_company_top a .h2_top.white , .top_company_top a .h2_top.white span {
    transition: 0.3s;    
} 
.top_company_top a:hover .h2_top.white , .top_company_top a:hover .h2_top.white span {
    color: var(--mainColor) !important;
}
.h2_top.white , .h2_top.white span {
    color: #fff;
}
.top_company_bottom {
    position: relative;
}
.top_company_bottom::after {
    content: "";
    display: block;
    width: 400px;
    height: 100%;
    position: absolute;
    z-index: 1;
    right: 0;
    top: 0;
    background-image: url(../img/top_profile_img04.jpg);
    background-position: left center;
    background-repeat: no-repeat;
    background-size: cover;
}
.top_company_bottom .left {
    display: flex;
    width: calc(100% - 400px);
    margin-left: 0;
    margin-right: auto;
    padding: 50px 0 50px 50px;
    gap: 30px;
    position: relative;
    z-index: 2;
}
/* キービジュアルのレスポンシブ - トリミング禁止 */
@media screen and (max-width: 768px) {
    #kv img {
        width: 100%;
        height: auto;
    }
}

/* ニュースセクションのレスポンシブ */
@media screen and (max-width: 1500px) {
    #top_news {
        padding-left: 380px;
    }
}

@media screen and (max-width: 1200px) {
    #top_news {
        padding-left: 50px;
        background-size: 200px auto;
        background-position: left 20px center;
    }
}

@media screen and (max-width: 1168px) {
    #top_news {
        padding-left: 20px;
        background-image: none;
    }
}

@media screen and (max-width: 768px) {
    #top_news {
        padding-left: 20px;
        background-image: none;
    }
    
    #top_news dl {
        flex-direction: column;
        gap: 10px;
    }
    
    #top_news dt {
        width: 100%;
        font-size: 14px;
        color: var(--mainColor);
        font-weight: bold;
    }
    
    #top_news dd {
        width: 100%;
        padding-left: 0;
        margin-bottom: 15px;
        border-bottom: 1px solid #ddd;
        padding-bottom: 10px;
    }
}

@media screen and (max-width: 480px) {
    .top_sec_padding {
        padding: 30px 15px;
    }
    
    .h2_top {
        font-size: 20px;
    }
    
    .h2_top span {
        font-size: 12px;
    }
}

/* CONTENTSセクションのレスポンシブ */
@media screen and (max-width: 1200px) {
    #top_contents ul {
        margin: 0 30px;
        gap: 30px;
    }
    
    #top_contents li {
        width: calc((100% - 60px) / 3);
    }
}

@media screen and (max-width: 900px) {
    #top_contents ul {
        margin: 0 20px;
        gap: 20px;
    }
    
    #top_contents li {
        width: calc((100% - 20px) / 2);
    }
}

@media screen and (max-width: 768px) {
    #top_contents {
        padding-top: 50px;
        background-size: 100% auto;
    }
    
    #top_contents ul {
        margin: 0 15px;
        gap: 20px;
    }
    
    #top_contents li {
        width: 100%;
        max-width: 400px;
        margin: 0 auto;
    }
    
    #top_contents li div {
        padding: 0 15px;
    }
    
    #top_contents li div p {
        font-size: 14px;
    }
}

@media screen and (max-width: 480px) {
    #top_contents ul {
        margin: 0 10px;
        gap: 15px;
    }
    
    #top_contents li div {
        padding: 0 10px;
    }
}

/* モバイル用要素は通常時は非表示 */
.top_company_mobile_bg,
.top_company_mobile_title {
    display: none;
}

/* COMPANY PROFILEセクションのレスポンシブ */
@media screen and (max-width: 1200px) {
    .top_company_bottom .left {
        gap: 30px;
    }
    
    .top_company_bottom .left img {
        width: 150px !important;
        height: 150px !important;
        object-fit: contain;
        flex-shrink: 0;
    }
}

@media screen and (max-width: 1068px) {
    .top_company_bottom .left {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }
    
    .top_company_bottom .left img {
        width: 150px !important;
        height: 150px !important;
        object-fit: contain;
        margin: 0 auto;
    }
}

@media screen and (max-width: 768px) {
    .top_company_top {
        height: auto;
        background-size: cover;
        padding-bottom: 0;
    }
    
    .top_company_top div {
        display: none;
    }
    
    /* 背景写真のみ表示 */
    .top_company_mobile_bg {
        display: block;
        height: 250px;
        background-image: url(../img/top_profile_img01.jpg);
        background-size: cover;
        background-position: center;
    }
    
    /* タイトル部分 */
    .top_company_mobile_title {
        display: block;
        background-color: var(--mainColor);
        padding: 30px 20px;
        text-align: center;
    }
    
    .top_company_mobile_title a {
        text-decoration: none;
    }
    
    .top_company_mobile_title .h2_top {
        color: white;
        margin: 0;
    }
    
    .top_company_mobile_title .h2_top span {
        color: white;
    }
    
    .top_company_bottom {
        padding: 30px 20px;
        background-color: white;
    }
    
    /* スマホでは背景画像を非表示 */
    .top_company_bottom::after {
        display: none;
    }
    

    
    .top_company_bottom .left {
        width: 100%;
        flex-direction: column;
        text-align: center;
        gap: 20px;
        padding: 30px 20px;
    }
    
    .top_company_bottom .left img {
        width: 120px !important;
        height: 120px !important;
        object-fit: contain;
        margin: 0 auto;
        display: block;
    }
    
    .top_company_bottom .left div h3 {
        font-size: 18px;
        margin-bottom: 15px;
    }
    
    .top_company_bottom .left div p {
        font-size: 14px;
        line-height: 1.6;
    }
}

@media screen and (max-width: 480px) {
    .top_company_bottom {
        padding: 20px 15px;
    }
    
    .top_company_bottom .left div h3 {
        font-size: 16px;
    }
    
    .top_company_bottom .left div p {
        font-size: 13px;
    }
}

/* 1068px以下でのコンテンツ余白 */
@media screen and (max-width: 1068px) {
    #top_news,
    #top_contents,
    .top_company_bottom {
        padding-left: 20px;
        padding-right: 20px;
        box-sizing: border-box;
    }
}

/* フッターナビゲーションのレスポンシブ */
@media screen and (max-width: 1068px) {
    .footer_nav {
        display: flex;
        flex-wrap: wrap;
        padding: 0 20px;
        box-sizing: border-box;
        gap: 10px;
    }
    
    .footer_nav li.title {
        width: 100%;
        text-align: center;
        margin-bottom: 10px;
        padding: 0;
        order: -1;
    }
    
    .footer_nav li:not(.title) {
        width: calc(33.333% - 7px);
        text-align: left;
    }
}

/* フッターのレスポンシブ */
@media screen and (max-width: 768px) {
    #footer {
        padding-top: 50px;
    }
    
    #footer .mb_10 img {
        width: 300px;
    }
    
    #footer .p18 {
        font-size: 14px;
        line-height: 1.6;
    }
    
    #footer .p14 {
        font-size: 12px;
        line-height: 1.5;
        margin-bottom: 20px;
    }
    
    .footer_sns {
        margin: 20px 0;
        gap: 15px;
    }
    
    .footer_nav {
        flex-direction: column;
        gap: 10px;
        text-align: left;
    }
    
    .footer_nav li {
        background-size: 15px auto;
        padding-left: 20px;
        font-size: 14px;
    }
    
    .copy {
        margin-top: 30px;
    }
}

@media screen and (max-width: 480px) {
    #footer .mb_10 img {
        width: 250px;
    }
    
    #footer .p18 {
        font-size: 13px;
    }
    
    #footer .p14 {
        font-size: 11px;
    }
    
    .footer_nav li {
        font-size: 13px;
    }
}

/* 会社概要 */
.gas_kv.company_kv{
    background-image: url(../img/company_kv.jpg);
    background-position: center;
}
.company h2 span.block , .flow h2 span.block , .gas_01 h2 span.block , .faq h2 span.block , .news h2 span.block , .contact h2 span.block{
    display: block;
    font-weight: 600;
    font-size: 20px;
}
h2 .block.block_line{
    margin-top: 2rem;
}
h2.company_h2 , h2.flow_h2 , h2.gas_h2 , h2.faq_h2 , h2.news_h2 ,h2.contact_h2{
    padding: 120px 0 100px;
    font-size: 36px;
    font-weight: 500;
}
h2 .h2_line{
    border-bottom: 5px solid var(--mainColor);
    line-height: 0;
}
h2.history_h2 , h2.policy_h2 , h2.profile_h2{
    padding: 80px 0 40px;
    font-size: 36px;
    font-weight: 500;
}
.history_flex{
    display: flex;
    gap: 30px;
    color: var(--rightColor);
}
.history_text{
    width: calc(100% - 366px - 30px);
}
.history_dl{
    display: inline-block;
    text-align: left;
}
.history_dl div{
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 1rem;
}
.history_dl dt {
    width: 140px;
}
.history_dl dd {
    flex: 1;
}
.history_flex_img{
    display: flex;
    gap: 5px;
}
.history_flex_img img{
    width: calc((100% - 10px) / 3);
}
.policy{
    background-color: #e6ebee;
}
.policy_ul_wrap{
    text-align: center;
}
.policy_ul{
    display: inline-block;
    list-style: none;
    text-align: left;
    padding-left: 2rem;
}
.policy_ul li{
    position: relative;
    margin-bottom: 1rem;
}
.policy_ul li::before {
    content: "■";
    position: absolute;
    left: -2rem;
    top: 0;
    color: #3ea4b9;
}
.profile_dl{
    padding-bottom: 100px;
}
.profile_dl div {
    display: flex;
    gap: 50px;
    flex-wrap: wrap;
    padding: 10px 0;
    border-bottom: 2px solid #dcdddd;
}
.profile_dl div:last-child{
    border-bottom: none;
}
.profile_dl dt {
    width: 150px;
    color: var(--mainColor);
}
.profile_dl dd{
    flex: 1;
}
@media screen and (max-width: 1000px) {
    .history_flex {
        flex-direction: column;
    }
    .history_img{
        text-align: center;
    }
    .history_text {
        width: 100%;
    }
}
@media screen and (max-width: 768px) {
    .history_dl div {
        gap: 0;
        flex-direction: column;
        margin-bottom: 1rem;
    }
    .profile_dl div {
        gap: 0;
        flex-direction: column;
    }
    .history_flex_img {
        flex-direction: column;
        gap: 0;
    }
    .history_flex_img img {
        width: 100%;
    }
    h2 .block.block_line {
        margin-top: 1rem;
    }
    h2.history_h2 , h2.policy_h2 , h2.profile_h2{
        padding: 20px 0;
    }
}
/* よくある質問 */
.gas_kv.faq_kv{
    background-image: url(../img/faq_kv.jpg);
    background-position: center;
}
  #faq .faq_dl .inner {
    margin-top: 30px;
    background-color: #fff;
  }
  section#faq .faq_dl dt {
    padding: 1rem 4rem 1rem 4rem;
    position: relative;
    cursor: pointer;
    border: #000 0.34px solid;
    transition: background-color 0.4s ease, color 0.4s ease;
  }
  section#faq .faq_dl dt::before {
    content: "Q";
    display: block;
    position: absolute;
    left: 15px;
    top: 50%;
    font-size: 25px;
    line-height: 25px;
    margin-top: -18px;
    padding: 0 7px 7px 7px;
    border-radius: 5px;
    background-color: #3ea4b9;
    color: #fff;
    font-weight: bold;
  }
  section#faq .faq_dl .btn {
    position: absolute;
    top: 50%;
    margin-top: -10px;
    right: 1.5rem;
  }
  section#faq .faq_dl .btn span {
    display: block;
    position: relative;
    width: 20px;
    height: 20px;
    background-color: #000;
    border-radius: 10px;
  }
  section#faq .faq_dl dt.highlight {
    background-color: #000;
    color: #fff;

  }
  section#faq .faq_dl .btn span::before,
  section#faq .faq_dl .btn span::after {
    content: "";
    display: inline-block;
    width: 14px;
    height: 2px;
    background-color: #fff;
    position: absolute;
    right: 3px;
    top: 50%;
    transform: translateY(-50%);
    transition: opacity 0.3s;
  }
  section#faq .faq_dl .btn span::after {
    transform: translateY(-50%) rotate(90deg);
    transition: transform 0.3s;
  }
  section#faq .faq_dl dt.highlight .btn span::before {
    opacity: 0;
  }
  section#faq .faq_dl dt.highlight .btn span::after {
    transform: translateY(-50%) rotate(180deg);
  }
  section#faq .faq_dl dd {
    display: none;
    background-color: var(--bgColorlight);
    font-size: 80%;
    padding: 1rem 2rem;
    line-height: 180%;
    font-weight: 500;
  }
  section#faq .faq_dl dd a {
    color: #fff;
  }
  section#faq .faq_dl dd a:hover {
    text-decoration: none;
  }
  @media screen and (max-width: 600px) {
    section#faq h3 {
      justify-content: center;
    }
    section#faq h3 img {
      width: 1.8rem;
    }
  }
  @media screen and (max-width: 850px) {
    section#faq .faq_dl .inner {
      margin-top: 20px;
    }
  }
  /* 工事の流れ */
  .gas_kv.flow_kv {
    background-image: url(../img/flow_kv.jpg);
    background-position: center right;
}
  .flow_bg{
    background-color: #e6ebee;
  }
  .flow_wrap{
    position: relative;
  }
  .flow_flex{
    display: flex;
    gap: var(--gaps);
    align-items: stretch;
  }
  .flow_flex_img{
    background-position: center center;
    background-size: cover;
    background-repeat: no-repeat;
    width: calc(45% - 15px);
    height: auto;
    min-height: 500px;
  }
  .flow_img_01{
    background-image: url(../img/flow_img01.jpg);
  }
  .flow_img_02{
    background-image: url(../img/flow_img02.jpg);
  }
  .flow_img_03{
    background-image: url(../img/flow_img03.jpg);
  }
  .flow_img_04{
    background-image: url(../img/flow_img04.jpg);
  }
  .flow_img_05{
    background-image: url(../img/flow_img05.jpg);
  }
  .flow_img_06{
    background-image: url(../img/flow_img06.jpg);
  }
  .flow_img_07{
    background-image: url(../img/flow_img07.jpg);
  }
  .flow_img_08{
    background-image: url(../img/flow_img08.jpg);
  }
  .flow_flex_reverse{
    flex-direction: row-reverse;
  }
  .flow_flex_contents{
    width: calc(55% - 15px);
    height: auto;
    min-height: 500px;
    padding-right: 20px;
  }
  .flow_flex_reverse .flow_flex_contents{
    padding-right: 0;
    padding-left: 20px;
  }
  .flow_h3 span , .news_post_category span{
    color: #fff;
    background-color: #000;
    padding: 0 10px;
    margin-right: 10px;
  }
  .flow_arrow{
    position: absolute;
    z-index: 2;
    bottom: calc(-71px / 2);
    left: 50%;
    transform: translateX(-50%);
  }
  @media screen and (max-width: 1719px) {
  .flow_flex_reverse .flow_flex_contents {
    padding-left: 0;
}
.flow_flex_contents {
    padding-right: 0;
}
  }

  @media screen and (max-width: 1079px) {
    .flow_flex {
        flex-direction: column;
    }
    .flow_flex_img {
        width: 100%;
        min-height: 450px;
    }
    .flow_flex_contents{
        width: 100%;
        min-height: auto;
    }
  }
  @media screen and (max-width: 768px) {
    .flow_flex_img{
        min-height: 300px;
    }
  }
  @media screen and (max-width: 500px) {
    .flow_h3 span{
        display: block;
        width: fit-content;
    }
    .flow_arrow {
        bottom: calc(-44px / 2);
        width: 44px;
    }
}
  /* プロパンガス */
  .gas_kv{
    background-image: url(../img/propane_gas_kv.jpg);
    height: 539px;
    width: 100%;
    background-size: cover;
  }
  .gas_kv_bg {
    position: relative;
    max-width: 1920px;
    width: 100%;
    height: 100%;
    margin: 0 auto;
    }
  .gas_kv_title{
    position: absolute;
    top: 50%;
    right: 20px;
  }
  .gas_img_01{
    background-image: url(../img/propane_gas_img01.jpg);
  }
  .gas_img_02{
    background-image: url(../img/propane_gas_img02.jpg);
  }
  .flow_flex_img.gas_img_01 {
    background-position: right top;
}
.flow_flex_img.gas_img_02 {
    background-position: right center;
}
  .gas_flex_contents.flow_flex_contents{
    color: #fff;
  }
  .gas_ul{
    list-style: none;
  }
  .gas_ul li{
    padding-left: 35px;
    position: relative;
  }
  .gas_ul li::before{
    content: "●";
    font-size: 18px;
    position: absolute;
    left: 0;
    top: 0;
  }
  .gas_flex02{
    display: flex;
    gap: var(--gaps);
    padding: 1rem;
    border: #3ea4b9 2.26px solid;
    border-radius: 15px;
  }
  .gas_flex02 img{
    max-width: 100%;
    height: auto;
    display: block;
    flex-shrink: 0; /* テキストのために画像が縮まないようにする */
  }
  .gas_flex02_contents {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
  .gas_02{
    background-color: #e6ebee;
  }
  .center-container {
    display: flex;
    justify-content: center; /* 横中央 */
  }
  .gas_02 h2.underline {
    position: relative;
    display: inline-block;
    text-align: center;
    line-height: 1.8;
    padding-bottom: 2rem;
    margin-bottom: 2rem;
}
.gas_02 h2.underline::after {
    content: "";
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 8px;
    width: 100px;
    height: 5px;
    background-color: var(--mainColor)
  }
  @media screen and (max-width: 768px) {
    .gas_02 h2.underline {
        padding-bottom: 1.5rem;
        margin-bottom: 1.5rem;
    }
    .gas_02 h2.underline::after {
        bottom: 0;
      }
}
  .gas_flex03{
    display: flex;
    gap: var(--gaps);
  }
  .gas_flex03 img{
    width: calc((100% - 60px) / 3);
  }
  @media screen and (max-width: 1179px) {
    .gas_kv {
        height: 300px;
    }
    .gas_kv_title {
        top: 10%;
    }
    .gas_kv_title img {
        width: 180px;
    }
  }
  @media screen and (max-width: 1079px) {
    .gas_flex02 {
        flex-direction: column;
    }
    .gas_flex02 img {
        width: 100%;
        max-width: 650px;
        margin: 0 auto;
    }
}
@media screen and (max-width: 768px) {
    .gas_flex03 {
        gap: 0;
        flex-direction: column;
    }
    .gas_flex03 img{
        width: 100%;
        height: auto;
    }
    .gas_kv_title img {
        width: 100px;
    }
    h2.company_h2, h2.flow_h2, h2.gas_h2 , h2.faq_h2 , h2.news_h2, h2.contact_h2{
        padding: 50px 0;
    }
    .gas_kv {
        height: 200px;
    }
}
@media screen and (max-width: 500px) {
    h2.company_h2, h2.flow_h2, h2.gas_h2 , h2.news_h2, h2.contact_h2{
        padding: 30px 0;
    }
    .gas_flex03 img {
        height: 250px;
        object-fit: cover;
        object-position: bottom;
    }
    .gas_ul li::before{
        font-size: 16px;
      }
      .gas_02 h2.underline {
        font-size: 5.5vw;
    }
}
/* ニュース＆トピックス 一覧*/
.gas_kv.news_kv {
    background-image: url(../img/news_kv.jpg);
    background-position: center left;
}
.news_wrap , .ex_wrap{
    width: 100%;
    position: relative;
}
.news_ul, .ex_ul , .news_post_wrap , .ex_post_wrap{
    width: 70%;
    list-style: none;
    border-top: #231815 0.45px solid;
    height: auto;
}
.news_ul li , .ex_ul li{
    padding: 1rem 0;
    border-bottom: #231815 0.45px solid;
}
.news_date a {
    border: 1px solid #3ea4b9;
    background-color: #3ea4b9;
    color: #fff;
    padding: 0 1rem;
    margin-left: 1rem;
    transition: 0.3s;
    text-decoration: none;
}
.news_date a:hover {
    background-color: #fff;
    color: #3ea4b9;
}
.news_title a{
    display: block;
    text-decoration: none;
    color: #000;
}.news_title a:hover{
    opacity: 0.6;
    transition: 0.2s;
}
.news_pager_flex , .ex_pager_flex{
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 10px;
}
.pager_prev , .ex_prev{
    margin-right: 10px;
}
.pager_prev a , .pager_no a , .pager_next a{
    text-decoration: none;
    color: #000;
    transition: 0.2s;
}
.pager_prev a:hover , .pager_next a:hover{
    color: #3ea4b9;
    transition: 0.2s;
}
.pager_no span {
    border: 1px solid #000;
    padding: 0 10px;
}
.pager_next{
    margin-left: 10px;
}
.news_category {
    position: absolute;
    top: 0;
    width: calc(30% - 70px);
    height: auto;
    right: 0;
}
.news_category_ul , .ex_category_ul{
    list-style: none;
}
.news_category_ul a{
    text-decoration: none;
    color: #000;
    transition: 0.2s;
}
.news_category_ul a:hover{
    opacity: 0.6;
    transition: 0.2s;
}
@media screen and (max-width: 1079px) {
    .news_category {
        position: relative;
        left: auto;
        width: 100%;
        padding-left: 0;
    }
    .news_ul, .ex_ul , .news_post_wrap , .ex_post_wrap{
        width: 100%;
    }
}
.news_post_wrap , .ex_post_wrap{
    border-top: none;
}
.news_post_title , .ex_post_title{
    border-bottom: #231815 0.45px solid;
}
.news_post_img img , .ex_post_img img{
    width: 100%;
}
.pager_list a{
    padding: 5px 10px;
    background-color: var(--mainColor);
    text-decoration: none;
    color: #fff;
    border: 1px solid var(--mainColor);
    transition: 0.3s;
}
.pager_list a:hover{
    background-color: var(--rightColor);
    color: var(--mainColor);

}
/* 施工実績　一覧 */
    .ex_kv_bg{
        background-image: url(../img/examples_kv.jpg);
        background-position: center;
        background-size: cover;
    }
    .ex_h2{
        padding: 150px 20px;
        color: #fff;
    }
    .ex_list{
        position: relative;
    }
    .ex_h2 span{
        display: block;
    }
    .ex_ul li{
        display: flex;
        gap: 1rem;
    }
    .ex_content{
        display: flex;
        flex-direction: column;
        justify-content: center;
    }
    .ex_title a{
        text-decoration: none;
        color: #000;
    }
    .ex_title a:hover{
        opacity: 0.6;
    }
    .ex_category{
        position: absolute;
        width: calc(30% - 100px);
        top: 100px;
        right: 20px;
        min-width: 250px;
        height: auto;
    }
    .ex_category_ul a{
        color: #000;
    }
    .ex_category_title {
        background-color: #3ea4b9;
        text-align: center;
        color: #fff;
    }
    .ex_category_ul{
        border: #040000 0.34px solid;
    }
    .ex_category_ul li{
        padding: 10px 20px;
    }
    .ex_category_ul a:hover{
        opacity: 0.6;
    }
    @media screen and (min-width: 1719px) {
        .news_wrap, .ex_wrap {
            padding-left: 20px;
        }
    }
    @media screen and (max-width: 1719px) {
        .ex_category{
            right: 0px;
        }
        .news_wrap, .ex_wrap {
            padding-left: 0;
        }
    }
    @media screen and (max-width: 1079px) {
        .ex_category {
            width: 100%;
            position: relative;
            top: 0;
            right: auto;
        }
    .ex_category_ul {
        display: flex;
        flex-wrap: wrap;
    }
}
@media screen and (max-width: 768px) {
    .ex_category_ul li {
        padding: 10px;
    }
    .ex_h2 {
        padding: 100px 20px;
    }
}
@media screen and (max-width: 600px) {
    .ex_ul li {
        flex-direction: column;
    }
    .ex_ul li img{
        width: 100%;
        height: 250px;
        object-fit: cover;
    }
    
}
  /* 新商品紹介 */
  .products_kv {
  }
  
  .products_kv_bg {
    width: 100%;
    height: 350px; 
    background-image: url(../img/new_products_kv02.png), url(../img/new_products_kv01.jpg);
    background-size: cover, cover;
    background-position: top, top;
    background-repeat: repeat, no-repeat;
    z-index: 1;
    position: relative;

  }

  .products_kv_title{
    position: relative;
    height: 100%;
  }
  .products_kv_title img{
    position: absolute;
    top: 50%;
    right: 20px;
  }
  .products_kv_flex{
    display: flex;
    height: auto;
    align-items: stretch;
    top: -50px;
    width: calc(100% - 276px);
    gap: 50px;
    padding: 0 20px;
  }
  .products_kv_flex .img{
    border: 8.5px solid #fff;
    width: calc(50% - 25px);
  }
  .products_kv_flex .img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
  .products_kv_h2{
    width: calc(50% - 25px);
    display: flex;
    align-items: flex-end;
  }
  .products h2 span.block{
    display: block;
  }
  .products_kv_h2_title{
    font-size: clamp(38px, 5vw, 100px);
    font-weight: 400;
  }
  .products_kv_wrap {
    position: relative;
    margin-top: -80px;
    z-index: 3;
    margin-bottom: 100px;
}
.products_bg {
    background-color: #e6ebee!important;
}
.products_ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    row-gap: 30px;
}
.products_ul li {
    width: calc(100% / 3 );
    background-color: #fff;
    border: 1px solid #b5b5b6;
    display: flex;
    flex-direction: column;
    margin-left: -1px;
}

.products_ul li:first-child,
.products_ul li:nth-child(3n+1) {
    margin-left: 0;
}
.products_item_inner {
    display: flex;
    flex-direction: column;
    height: 100%;
}
.products_item_img img {
    width: 100%;
    height: auto;
    object-fit: contain;
}
.products_item_text {
    padding: 20px 20px 10px 20px;
    flex-grow: 1;
}
.products_item_footer {
    padding: 10px 20px 20px 20px;
    text-align: center;
}
@media screen and (min-width: 1720px) and (max-width: 1950px) {
    .products_ul {
        padding: 0 20px;
    }
}
  @media screen and (max-width: 1719px) {
    .products_kv_title img{
        right: 0;
      }
    }
    .products_kv_flex {
        padding: 0;
    }

  @media screen and (max-width: 1179px) {
    .products_kv_title img{
        width: 180px;
    }
    .products_kv_flex{
        width: calc(100% - 200px);
        gap: 30px;
      }
      .products_kv_bg {
        height: 300px;
    }
      .products_kv_flex .img{
        border: 8.5px solid #fff;
        width: calc(50% - 15px);
      }
      .products_kv_h2{
        width: calc(50% - 15px);
      }
      .products_kv_title img{
        top: 10%;
      }
  }
  @media screen and (max-width: 900px) {
    .products_ul li {
        width: calc(100% / 2 );
    }
    
    .products_ul li:nth-child(3n+1) {
        margin-left: 0;
    }
    
    .products_ul li:nth-child(2n+1) {
        margin-left: 0;
    }
  }
  @media screen and (max-width: 768px) {
    .products_kv_title img{
        width: 100px;
    }
    .products_kv_flex{
        width: 100%;
      }
      .products_kv_bg {
        height: 250px;
    }
    .products_kv_flex .img {
        display: none;
    }
    .products_kv_h2 {
        width: 100%;
    }
    .products_kv_wrap {
        margin-top: -50px;
        margin-bottom: 50px;
    }
    .products_kv_title img{
        top: 5%;
      }
  }
  @media screen and (max-width: 500px) {
  .products_kv_wrap {
    margin-bottom: 30px;
        }
        .products_ul li {
            width: 100%;
            margin-left: 0;
        }
        .products_ul {
            row-gap: 20px;
        }
    }
      /* 給湯器 */
      .products_post_kv_bg{
        background-image: url(../img/new_products_detail_bg.jpg);
        background-repeat: no-repeat;
        background-size: cover;
        background-position: center;
        height: 539px;
      }
      .products_post_kv_bg div{
        position: relative;
        height: 100%;
}
      .products_post_kv_bg h2{
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
        left: 20px;
      }
      .products_post_ul {
        list-style: none;
      }
      .products_post_li {
        display: flex;
        gap: 30px;
        padding: 80px 20px;
        align-items: start;
        border-bottom: 0.85px solid #231815;
    }
      .products_post_li img{
        width: 500px;
        height: auto;
        object-fit: contain;
      }
      .products_post_item{
        width: calc(100% - 30px - 500px);
      }
      .products_post_spec{
        background-color: #fff;
        background-image: url(../img/prducts_post_spec_bg.png);
        background-repeat: repeat;
        background-position: center;
        padding: 20px;
      }
      .products_post_spec dl{
        display: flex;
        gap: 10px;
        flex-direction: column;
        margin-left: 1rem;
      }
      .products_post_spec dl div{
        display: flex;
        gap: 10px;
      }
      .price_rec , .kitchin_spec dd{
        color: #b8292d;
        font-weight: 600;
      }
      @media screen and (max-width: 1719px) {
      .products_post_li {
        padding: 80px 0;
    }
    .products_post_kv_bg h2{
        left: 0;
      }
    }
    @media screen and (max-width: 1179px) {
        .products_post_kv_bg{
            height: 300px;
        }
        .products_post_kv_bg img{
            width: 150px;
          }
    }
      @media screen and (max-width: 1079px) {
      .products_post_li {
        flex-direction: column;
        }
        .products_post_li img {
            width: 100%;
            max-width: 500px;
            margin: 0 auto;
        }
        .products_post_item {
            width: 100%;
        }
    }
    @media screen and (max-width: 768px) {
        .products_post_kv_bg{
            height: 200px;
        }
        .products_post_kv_bg img{
            width: 100px;
        }
        .products_post_li {
            padding: 30px 0;
        }
        .products_post_spec dl div {
            flex-direction: column;
            gap: 0;
        }
    }
          /* お問い合わせ */
          .gas_kv.gascontact_kv{
            background-image: url(../img/contact_gas_kv.jpg);
            background-position: center left;
        }
        .contact_block{
            display: block;
        }
        .gas_kv.reformcontact_kv{
            background-image: url(../img/contact_reform_kv.jpg);
            background-position: center;
        }

.ex_contents {
    display: flex;
    flex-direction: column;
    gap: 30px 0;
}
.comingsoon {
    padding-top: 100px;
    text-align: center;
}
@media screen and (max-width: 768px) {
    .comingsoon {
        padding-top: 50px;
    }
}
.gas_flex04{
    display: flex;
    gap: 50px;
    padding: 0 30px;
}
.gas_flex04 div{
    width: calc(50% - 25px);
}
.gas_flex04 div img{
    width: 100%;
}
.gas_03{
    background-color: #e6ebee;
    padding: 50px 0;
    border-radius: 15px;
    border: #3ea4b9 2.26px solid;
}
.gas_price div{
    display: flex;
    justify-content: center;
}
.gas_price div p{
    text-align: justify;
}
@media screen and (max-width: 1200px) {
    .gas_flex04{
        gap: 30px;
        padding: 0 10px;
    }
    .gas_flex04 div{
        width: calc(50% - 15px);
    }
}
@media screen and (max-width: 768px) {
    .gas_flex04{
        flex-direction: column;
    }
    .gas_flex04 div{
        width: 100%;
    }
    .gas_flex04{
        gap: 20px;
        padding: 0;
    }
    .gas_flex04 div{
        width: 100%;
    }
    .gas_flex04_inner{
        max-width: 400px;
        margin: 0 auto;
    }
}
@media screen and (min-width: 500px) {
    .gas_03_sp_br{
        display: none;
    }
}
@media screen and (min-width: 960px) {
    .gas_03_tab_br{
        display: none;
    }
}
.center-container {
    display: flex;
    justify-content: center; /* 横中央 */

  }