* {
    box-sizing: border-box;
    padding: 0;
    margin: 0;
}

:root {
    --color-ink: #333;
    --color-white: #fff;
    --color-brown: #A98B68;
    --color-gold: #93897A;
    --color-grey: #E0E0DF;
    --color-darkbrown: #211E1A;
    --font-base: 15px;
    --font-height: 2.26em;
    --another-font-height: 1.9em;
    --font-serifja: "Zen Old Mincho", serif;
    --font-serifen: "EB Garamond", sans-serif;
}
  
body {
    color: var(--color-ink);
    background-color: var(--color-white);
    font-size: var(--font-base);
    font-family: var(--font-serifja);
    line-height: var(--font-height);
    letter-spacing: 0.0213em;
}
  
li {
    list-style: none;
}

a {
    text-decoration: none;
    color: var(--color-ink);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    object-fit: cover;      /* アスペクト比を保ったまま指定枠に収める */
    vertical-align: middle; /* display:blockにしない場合の余白対策の代替案 */
}

.fixed-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    mix-blend-mode: difference;
    padding: 20px 60px 20px 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header_logo {
    width: 345px;
    transition: all .3s;
}

.header_logo:hover {
    opacity: .5;
}

.fixed-header .nav_cta {
    display: flex;
    align-items: center;
    gap: 50px;
}

.fixed-header .nav_cta .header_nav ul {
    display: flex;
    gap: 30px;
}

.fixed-header .nav_cta .header_nav ul li a {
    color: var(--color-white);
}

.fixed-header.is-over-hero {
    mix-blend-mode: normal;
}

.header_nav ul li a {
    color: #fff;
    transition: all .3s;
  }

  .header_nav ul li a:hover {
    opacity: .5;
  }

.contact {
    color: var(--color-white);
    border: 1px solid var(--color-white);
    padding: 10px 30px;
    font-size: 12px;
    transition: .3s all;
}

.contact:hover {
    background-color: var(--color-white);
    color: var(--color-ink);
}

.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 7px;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 200;
    position: relative;
}

.hamburger span {
    display: block;
    width: 28px;
    height: 1px;
    background-color: var(--color-white);
    transition: transform .3s ease, opacity .3s ease;
}

.hamburger.is-active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
.hamburger.is-active span:nth-child(2) {
    opacity: 0;
}
.hamburger.is-active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

.mobile-nav {
    position: fixed;
    inset: 0;
    z-index: 90;
    background-color: var(--color-darkbrown);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-16px);
    transition: opacity .4s ease, transform .4s ease, visibility .4s;
}

.mobile-nav.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
}

.mobile-nav nav {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 50px;
}

.mobile-nav ul {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.mobile-nav ul li a {
    color: var(--color-white);
    font-size: 14px;
    letter-spacing: .05em;
    transition: opacity .3s;
}

.mobile-nav ul li a:hover {
    opacity: .6;
}

.mobile-nav .contact {
    color: var(--color-white);
    border: 1px solid var(--color-white);
    padding: 12px 40px;
    font-size: 13px;
    transition: all .3s;
}

.mobile-nav .contact:hover {
    background-color: var(--color-white);
    color: var(--color-ink);
}

body.nav-open {
    overflow: hidden;
}

#hero {
    width: 100%;
    height: 100vh;
    background-image: url(../images/hero.jpg);
    background-position: center center;
    background-size: cover;
    position: relative;
}

h1 {
    position: absolute;
    left: 60px;
    bottom: 60px;
    color: var(--color-white);
    font-size: 92px;
    line-height: 110px;
    font-weight: 600;
}

h2 {
    margin: 0 0 60px; /* タイトルとコンテンツの間隔 */
}

.h2_s {
    font-family: var(--font-serifen);
    font-weight: 600;
    font-size: 13px;
    line-height: var(--another-font-height);
    margin: 0 0 10px;
    font-style: italic;
    color: var(--color-brown);
}

.h2_l {
    font-size: 50px;
    line-height: 1.3em;
    font-weight: 600;
}

.view_more {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 17px;
    transition: all .3s;
}

.view_more span {
    display: inline-block;
    width: 36px;
}

.view_more:hover {
    opacity: .5;
}

#about_hp {
    padding: 200px 100px 0;
    display: flex;
    justify-content: space-between;
}

.about_content {
    width: 600px;
}

.about_txt {
    margin: 0 0 30px;
}


.stage-title {
    position: absolute;
    z-index: 3;
    top: 30px; /* 50% → 上から120pxに変更 */
    left: 50%;
    transform: translateX(-50%); /* translate(-50%, -50%) → Xのみに変更 */
    text-align: center;
    color: #fff;
    opacity: 0;
    will-change: opacity;
}

.stage-title .h2_s,
.stage-title .h2_l {
    white-space: nowrap;  /* ← 追加：改行を禁止 */
}

.scroll-stage {
    position: relative;
    /* 高さはJSで動的に設定 */
  }
  
.scroll-stage-sticky {
    position: sticky;
    top: 0;
    height: 100vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.stage-view-more {
    position: absolute;
    z-index: 3;
    bottom: 60px;
    left: 50%;
    transform: translateX(-50%);
    color: #fff;
    opacity: 0;              /* h2と同様、フェードインだけさせる */
    will-change: opacity;
}

.stage-bg {
    position: absolute;
    inset: 0;
    margin: auto;
    width: 88%;
    height: 70vh;
    background-image: url(../images/about_omg.jpg);
    background-position: center center;
    background-size: cover;
    will-change: width, height;
}
  
.stage-overlay {
    position: absolute;
    inset: 0;
    background-color: #211e1ab0;
    opacity: 0;
}
  
.stage-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 0;
    color: #fff;
    transform: translateY(60px);
    will-change: opacity, transform;
    width: 100%;
    margin: 60px 0 0;
}


.commitment_list {
    display: flex;
    will-change: transform;
    gap: 80px;
    align-self: flex-start;   /* リストだけ左端起点にする */
    padding: 0 100px;      /* about_hp などと余白を揃えたい場合 */

}

.commitment_list li .com_img {
    width: 690px;
    height: 460px;
    margin: 0 0 20px;
    overflow: hidden;
}

.commitment_list li .com_img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.commitment_list li h3 {
    font-weight: 600;
    font-size: 22px;
    line-height: 1.64em;
    margin: 0 0 10px;
}
.commitment_list li h3 span {
    font-family: var(--font-serifen);
    font-size: 24px;
    line-height: 1.167em;
    margin: 0 10px 0 0;
}

.view_more_white {
    display: none;
}



#process_hp {
    position: relative;
    height: 600vh; /* 100vh × ステップ数(6)。スクロール量を決める */
    padding: 100px 0 0;
}

/* タイトル＋画像＋テキストをまとめて画面に固定・中央配置 */
.process_pin {
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 100px;
}

.process_pin h2 {
    text-align: center;
}

.process_wrapper {
    display: flex;
    align-items: center; /* 画像とテキストの高さが違っても中央揃えにできる */
    justify-content: space-between;
    height: 630px; /* 60vh → 画像の実際の高さに合わせて固定 */
    gap: 60px; /* 画像とテキストの間隔(現状指定がないため追加推奨) */
}

.pc-only { display: block; }
.sp-only { display: none; }

/* 左：画像 */
.process_images {
    position: relative;
    width: 42.28%; 
    height: 630px; /* 100% → 実サイズを直接指定 */
    flex-shrink: 0; /* flexで縮まないように */
}

.process_image {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.process_image.is-active {
    opacity: 1;
}

.process_image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 右：テキスト */
.process_txt {
    position: relative;
    width: 44%;
    height: 630px;
}

.step {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.step.is-active {
    opacity: 1;
}

.step h3 {
    font-weight: 600;
    font-size: 36px;
    line-height: 1.33em;
    margin: 0 0 20px;
    display: flex;
    align-items: flex-end;
}

.step h3 span {
    font-family: var(--font-serifen);
    font-size: 20px;
    line-height: 1.33em;
    margin: 0 20px 3px 0;
    display: block;
    font-style: italic;
    color: var(--color-brown);
}

/* トリガー：見えないがスクロール量と切り替えタイミングを担う */
.process_triggers {
    position: absolute;
    inset: 0;
    z-index: -1;
    pointer-events: none;
}

.trigger {
    height: calc(100% / 6); /* ステップ数で割る */
}


#works_hp {
    padding: 100px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

#works_hp h2 {
    text-align: center;
}



.work_list {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 60px;
}

.work_list>li {
    width: 47%;
}

.work_list li img {
    margin: 0 0 20px;
}

.work_list li h3 {
    font-size: 28px;
    font-weight: 600;
    line-height: var(--another-font-height);
    border-bottom: 1px solid var(--color-grey);
    padding: 0 0 10px;
}

.spec {
    margin: 15px 0 0;
    display: flex;
    gap: 28px;
}

.title {
    font-size: 11px;
    line-height: 1.4em;
    color: var(--color-gold);
}

.value {
    font-size: 13px;
    line-height: var(--another-font-height);
}

#works_hp .view_more {
    margin: 60px 0 0;
}


#news_hp {
    padding: 100px 100px 200px;
    display: flex;
    justify-content: space-between;
}

.news_content {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 60px;
    width: 50%;
}

.news_list {
    border-top: 1px solid var(--color-grey);
    width: 100%;
}

.news_list li {
    padding: 37px 0;
    border-bottom: 1px solid var(--color-grey);
}

.news_list li a {
    transition: all .3s;
}

.news_list li a:hover {
    opacity: .5;
}

.post_info {
    display: flex;
    gap: 30px;
    align-items: center;
    margin: 0 0 20px;
}

.post_info .date {
    font-size: 15px;
    font-weight: 500;
    font-family: var(--font-serifen);
    line-height: var(--another-font-height);
    color: var(--color-gold);
}

.post_info .news_category {
    display: inline-block;
    padding: 4px 10px;
    font-size: 11px;
    font-weight: 600;
    line-height: var(--another-font-height);
    color: var(--color-gold);
    border: 1px solid var(--color-gold);
}


footer {
    display: flex;
    position: relative;
}

.footer_left,
.footer_right {
    width: 50%;
}

.footer_left {
    padding: 50px 50px 150px;
    background-color: var(--color-darkbrown);
    display: flex;
    justify-content: space-between;
}


.footer_logo {
    width: 250px;
    margin: 0 0 20px;
}

.company_info,
.company_info p,
.company_info a {
    color: var(--color-white);
}

.address {
    line-height: 1.54em;
    margin: 0 0 5px;
}

.contact_info {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.contact_info a {
    line-height: 1.54em;
    display: inline;
}

.footer_nav {
    width: 400px;
}

.footer_nav ul {
    display: flex;
    flex-direction: column;
    gap: 20px 0;
}
.footer_nav ul li {
    width: 100%;
    border-bottom: 1px solid var(--color-white);
}


.footer_nav ul li a  {
    display: block;
    padding: 0 0 20px;
    color: var(--color-white);
    transition: all .3s;
}


.footer_nav ul li a:hover {
    opacity: .5;
}

.footer_right {
    position: relative;
}

.footer_right::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background-image: url(../images/cta_bg.jpg);
    background-position: top center;
    background-size: cover;
    z-index: 1;
}
.footer_right::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background-color: var(--color-darkbrown);
    opacity: .6;
    z-index: 2;
}

.footer_right_content {
    position: relative;
    z-index: 10;
    padding: 150px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--color-white);
    text-align: center;
}

.footer_right_content h2 .h2_s {
    color: var(--color-white);
}

.contact_us {
    margin: 0 0 60px;
    font-size: 24px;
    line-height: 1.5em;
}

.footer_right_content .view_more {
    color: var(--color-white);
}

.bottom {
    position: absolute;
    left: 50px;
    bottom: 20px;
    right: 50px;
    color: var(--color-white);
    z-index: 10;
    padding: 20px 0 0;
    display: flex;
    justify-content: space-between;
}

.bottom small {
    color: var(--color-white);
}


@media (max-width: 1500px) {
    .fixed-header {
        padding: 10px 60px 10px 60px;
    }
    .header_logo {
        width: 280px;
    }
    .stage-title {
        top: 60px;
    }
    .stage-content {
        margin: 60px 0 0;
    }
    .stage-view-more {
        bottom: 30px;
    }
    .commitment_list {
        margin-top: 30px; 
        gap: 60px;
    }
    .commitment_list li .com_img {
        width: 540px;
        height: 360px;
    }

    .process_wrapper,
    .process_images {
        height: 400px;
    }

    .news_content {
        width: 65%;
    }

    .footer_left {
        flex-direction: column;
        gap: 40px;
    }

    .footer_nav {
        width: 100%;
    }

    .footer_nav ul {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: space-between;
    }

    .footer_nav ul li {
        width: 48%;
    }
}

@media (max-width: 1100px) {
    .fixed-header {
        padding: 25px 40px 20px 40px;
    }
    .header_logo {
        width: 200px;
    }
    .fixed-header .nav_cta .header_nav ul {
        gap: 20px;
    }
    .fixed-header .nav_cta .header_nav ul li a {
        font-size: 13px;
    }
    .fixed-header .nav_cta {
        gap: 40px;
    }
    .contact {
        padding: 7px 24px;
        font-size: 11px;
    }

    h1 {
        font-size: 60px;
        line-height: 70px;
        left: 40px;
    }
    .h2_l {
      font-size: 40px;  
    }
    .h2_s {
        font-size: 12px;
    }
    #about_hp {
        padding: 150px 5% 80px;
    }
    .about_content {
        width: 50%;
    }
    .scroll-stage {
        height: auto !important; /* JSが入れるheightを上書き */
    }

    .scroll-stage-sticky {
        position: static;
        height: auto;
        overflow: visible;
        display: block;
        padding: 0 0 100px;
        background-color: var(--color-darkbrown);
    }

    .stage-bg {
        position: static;
        width: 100% !important;
        height: 50vh !important;
        margin: 0 0 40px;
    }

    .stage-overlay {
        display: none;
    }

    .stage-title {
        position: static;
        transform: none;
        opacity: 1 !important;
        margin: 100px 0 40px;
    }

    .stage-title .h2_s,
    .stage-title .h2_l {
        white-space: normal; /* PC用のnowrapを解除、自然に折り返す */
    }

    .stage-content {
        opacity: 1 !important;
        transform: none !important;
        margin: 0;
    }

    .commitment_list {
        flex-direction: column;
        padding: 0;
        gap: 60px;
        margin-top: 0;
        width: 90%;
        margin: 0 auto;
    }

    .commitment_list li .com_img {
        width: 100%;
        height: auto;
        aspect-ratio: 3 / 2;
    }

    .stage-view-more {
        position: static;
        transform: none;
        opacity: 1 !important;
        color: var(--color-ink); /* 背景が白地になるので文字色を戻す */
        margin: 60px 0 0;
        display: none;
    }

    .view_more_white {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 17px;
        transition: all .3s;
        color: var(--color-white);
        margin: 60px auto 0;
        width: fit-content;   
    }
    .view_more_white span {
        display: inline-block;
        width: 36px;
    }

    .step h3 {
        flex-direction: column;
        align-items: flex-start;
        font-size: 30px;
        margin: 0 0 15px;
    }
    .step h3 span {
        font-size: 18px;
    }
    .process_pin {
        padding: 50px 5% 75px;
    }
    .process_txt {
        width: 50%;
    }
    #works_hp {
        padding: 75px 5%;
    }
    .work_list {
        gap: 50px 0;
    }
    #news_hp {
        padding: 75px 5% 150px;
    }
    footer {
        flex-direction: column;        
    }
    .footer_left, 
    .footer_right {
        width: 100%;
    }
    .footer_left {
        padding: 50px;
    }
}


@media (max-width: 767px) {
    body {
        font-size: 13px;
    }
    .fixed-header {
        padding: 15px 5% ;
    }
    .fixed-header .nav_cta {
        display: none;
    }
    .hamburger {
        display: flex;
    }
    #hero {
        height: 600px;
        background-image: url(../images/hero_resoponsive.png);
    }
    h1 {
        font-size: 36px;
        line-height: 48px;
        left: 5%;
        bottom: 30px;
        /* transform: translateY(50%); */
    }
    h2 {
        text-align: center;
        margin: 0 0 30px;
    }
    .h2_l {
        font-size: 28px;
    }
    .h2_s {
        font-size: 10px;
    }
    .view_more_white,
    .view_more {
        font-size: 15px;
    }
    .view_more span,
    .view_more_white span {
        width: 32px;
    }

    #about_hp {
        flex-direction: column;
        padding: 100px 5% 80px;
    }
    .about_txt {
        margin: 0 0 20px;
    }

    .about_content {
        width: 100%;
    }
    .about_content .view_more {
        width: fit-content;
        margin: 0 auto;
    }
    .stage-bg {
        height: 250px !important;
    }
    .stage-title {
        margin: 80px 0 30px;
    }

    .commitment_list li .com_img {
        margin: 0 0 15px;
    }
    .commitment_list li h3 {
        font-size: 20px;
        margin: 0 0 5px;
    }
    .commitment_list li h3 span {
        font-size: 18px;
    }
    .commitment_list {
        gap: 40px;
    }

    .view_more_white {
        margin: 20px auto 0;
    }
    #process_hp { 
        height: auto; 
        padding: 100px 5% 50px;
    }
  
    .process_pin {
        position: static;
        height: auto;
        padding: 0;
    }

    .process_pin h2 { margin: 0 0 30px; }

    .pc-only { display: none; }
    .sp-only { display: block; }

    .process_triggers { display: none; }
    .process_wrapper {
        display: block;       /* flexのままだと単一の子要素に余計な整形が入るためblockに */
        height: auto;         /* 固定pxを解除し、中身に応じて伸縮させる */
        align-items: normal;  /* flex用プロパティのリセット(念のため) */
        justify-content: normal;
        gap: 0;
    }

    .process_mobile_item {
        margin: 0 0 40px;
    }

    .process_mobile_item:last-child {
        margin-bottom: 0;
    }

    .process_mobile_img {
        width: 100%;
        aspect-ratio: 720 / 630;
        margin: 0 0 20px;
    }

    .process_mobile_img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .process_mobile_item h3 {
        font-weight: 600;
        font-size: 24px;
        line-height: 1.6em;
        margin: 0 0 10px;
        text-align: center;
    }

    .process_mobile_item h3 span {
        font-family: var(--font-serifen);
        font-size: 16px;
        line-height: 1.167em;
        margin: 0 0 4px;
        display: block;
    }

    #works_hp {
        padding: 50px 5%;
    }

    .work_list {
        gap: 30px;
    }

    .work_list>li {
        width: 100%;
    }

    .work_list li img {
        margin: 0 0 10px;
    }

    .work_list li h3 {
        font-size: 20px;
    }
    #works_hp .view_more {
        margin: 20px 0 0;
    }

    #news_hp {
        flex-direction: column;
        padding: 50px 5% 100px;
    }

    .news_content {
        width: 100%;
        gap: 30px;
        align-items: center;
    }
    .news_list li {
        padding: 25px 0;
    }
    .post_info {
        margin: 0 0 10px;
        gap: 15px;
    }
    .footer_left {
        padding: 40px 5% 50px;
        gap: 25px;
    }
    .footer_nav ul li {
        width: 46%;
    }
    .footer_nav ul li a {
        padding: 0 0 12px;
    }
    .footer_right_content {
        padding: 100px 0 150px;   
    }

    .contact_us {
        font-size: 20px;
        margin: 0 0 30px;
    }

    .bottom {
        flex-direction: column;
        font-size: 10px;
        align-items: center;
        line-height: 2em;
    }
}