@import url('https://fonts.googleapis.com/css2?family=Zen+Kaku+Gothic+New:wght@400;500;700;900&family=Noto+Sans+JP:wght@300;400;500;700&family=Outfit:wght@300;400;500;600&display=swap');

/* ===== パレット（モダン・ミニマル / ウォームニュートラル） ===== */
:root{
  --ink:#1f1c18;        /* 本文・見出し（温かみのある墨色） */
  --ink-soft:#4a443c;
  --muted:#9c9384;      /* キャプション */
  --bg:#ffffff;
  --bg-2:#f5f2ec;       /* セクション交互背景 */
  --bg-3:#ebe6dd;
  --line:#e4ded3;       /* ヘアライン */
  --brown:#6E5232;      /* アクセント（木目） */
  --olive:#5E6B47;      /* CTA */
  --olive-dark:#4b5739;
  --maxw:1240px;
  --ease:cubic-bezier(.4,0,.2,1);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Noto Sans JP','Zen Kaku Gothic New',sans-serif;
  color:var(--ink);background:var(--bg);
  font-weight:400;line-height:1.9;font-size:15.5px;
  -webkit-font-smoothing:antialiased;letter-spacing:.01em;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

h1,h2,h3,h4{font-family:'Zen Kaku Gothic New',sans-serif;font-weight:700;line-height:1.45;letter-spacing:.02em}
.en{font-family:'Outfit',sans-serif;letter-spacing:.22em;text-transform:uppercase;font-weight:500}

.container{max-width:var(--maxw);margin:0 auto;padding:0 32px}
.section{padding:120px 0}
.section.alt{background:var(--bg-2)}
.section.dark{background:var(--ink);color:#fff}

/* ===== セクション見出し（ミニマル） ===== */
.sec-head{margin-bottom:64px;max-width:640px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-head .en{display:block;color:var(--brown);font-size:.72rem;margin-bottom:18px}
.sec-head h2{font-size:2.1rem;font-weight:700;letter-spacing:.04em;line-height:1.4}
.sec-head p{margin-top:20px;color:var(--ink-soft);font-size:.96rem;font-weight:300}
.section.dark .sec-head .en{color:#b9a986}
.section.dark .sec-head p{color:#c9c2b6}

/* ===== ボタン（ミニマル / 角なし） ===== */
.btn{
  display:inline-flex;align-items:center;gap:.8em;
  padding:17px 38px;font-family:'Zen Kaku Gothic New',sans-serif;font-weight:500;
  font-size:.92rem;letter-spacing:.06em;transition:.35s var(--ease);cursor:pointer;border:none;
  position:relative;
}
.btn .ar{font-family:'Outfit';transition:transform .35s var(--ease)}
.btn:hover .ar{transform:translateX(5px)}
.btn-primary{background:var(--olive);color:#fff}
.btn-primary:hover{background:var(--olive-dark)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#000}
.btn-outline{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.btn-outline:hover{background:var(--ink);color:#fff}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.6)}
.btn-ghost:hover{background:#fff;color:var(--ink)}

/* ===== ヘッダー（極細・透過→スクロールで白） ===== */
header{position:fixed;top:0;left:0;right:0;z-index:100;transition:.4s var(--ease)}
header.solid{background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:84px}
.logo{display:flex;align-items:baseline;gap:10px;color:var(--ink)}
.logo .name{font-family:'Outfit',sans-serif;font-weight:600;font-size:1.35rem;letter-spacing:.12em}
.logo small{font-size:.6rem;color:var(--muted);letter-spacing:.3em}
.hero-on .logo{color:#fff}.hero-on .logo small{color:rgba(255,255,255,.7)}
header.solid .logo{color:var(--ink)}header.solid .logo small{color:var(--muted)}
.nav-links{display:flex;align-items:center;gap:38px;list-style:none}
.nav-links a{font-size:.86rem;letter-spacing:.06em;font-weight:500;color:var(--ink);transition:opacity .25s;opacity:.85}
.hero-on .nav-links a{color:#fff}
header.solid .nav-links a{color:var(--ink)}
.nav-links a:hover{opacity:1}
.nav-links a.active{border-bottom:1px solid currentColor;padding-bottom:3px}
.nav-cta{border:1px solid currentColor;padding:11px 24px !important;opacity:1 !important;letter-spacing:.08em}
.nav-cta:hover{background:var(--olive);border-color:var(--olive);color:#fff !important}
.hero-on .nav-cta:hover{color:#fff !important}
.hamburger{display:none;flex-direction:column;gap:6px;background:none;border:none;cursor:pointer;padding:6px;z-index:120}
.hamburger span{width:28px;height:1.5px;background:var(--ink);transition:.3s}
.hero-on .hamburger span{background:#fff}
header.solid .hamburger span{background:var(--ink)}

/* ===== ヒーロー（フルブリード写真） ===== */
.hero{position:relative;height:100vh;min-height:640px;color:#fff;overflow:hidden;display:flex;align-items:flex-end}
.hero-media{position:absolute;inset:0;z-index:0}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,18,15,.35) 0%,rgba(20,18,15,.15) 40%,rgba(20,18,15,.72) 100%)}
.hero .container{position:relative;z-index:2;padding-bottom:88px;width:100%}
.hero .en{display:block;font-size:.78rem;margin-bottom:24px;opacity:.9}
.hero h1{font-size:clamp(2.1rem,4.6vw,3.7rem);font-weight:700;line-height:1.5;letter-spacing:.03em}
.hero .lead{margin-top:26px;font-size:1.02rem;max-width:32em;font-weight:300;opacity:.92;line-height:2}
.hero .btns{margin-top:44px;display:flex;gap:18px;flex-wrap:wrap}
.scroll-hint{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:2;font-family:'Outfit';font-size:.62rem;letter-spacing:.3em;color:rgba(255,255,255,.8);writing-mode:vertical-rl;text-orientation:mixed}
.scroll-hint::after{content:"";display:block;width:1px;height:46px;background:rgba(255,255,255,.6);margin:14px auto 0;animation:scl 2s var(--ease) infinite}
@keyframes scl{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ===== 下層ページヘッダー ===== */
.page-hero{position:relative;height:48vh;min-height:340px;color:#fff;display:flex;align-items:center;overflow:hidden}
.page-hero .hero-media{position:absolute;inset:0;z-index:0}
.page-hero .hero-media img{width:100%;height:100%;object-fit:cover}
.page-hero .hero-media::after{content:"";position:absolute;inset:0;background:rgba(20,18,15,.5)}
.page-hero .container{position:relative;z-index:2;padding-top:40px}
.page-hero .en{display:block;font-size:.74rem;margin-bottom:16px;opacity:.9}
.page-hero h1{font-size:clamp(1.8rem,3.5vw,2.7rem);letter-spacing:.05em}
.breadcrumb{font-family:'Outfit';font-size:.74rem;letter-spacing:.08em;color:var(--muted);padding:22px 0;border-bottom:1px solid var(--line)}
.breadcrumb a:hover{color:var(--ink)}

/* ===== グリッド ===== */
.grid{display:grid;gap:2px}
.grid-2{grid-template-columns:repeat(2,1fr);gap:64px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* ===== 事業カード（写真フォワード / ミニマル） ===== */
.biz-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line)}
.biz-cards a{position:relative;aspect-ratio:3/4;overflow:hidden;background:var(--bg-3);display:flex;align-items:flex-end;color:#fff}
.biz-cards img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease);z-index:0}
.biz-cards a::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.05),rgba(20,18,15,.7));z-index:1;transition:.4s}
.biz-cards a:hover img{transform:scale(1.07)}
.biz-cards .cap{position:relative;z-index:2;padding:28px 24px}
.biz-cards .num{font-family:'Outfit';font-size:.66rem;letter-spacing:.2em;opacity:.8;display:block;margin-bottom:8px}
.biz-cards .cap h3{font-size:1.2rem;letter-spacing:.06em}
.biz-cards .cap p{font-size:.78rem;font-weight:300;opacity:.85;margin-top:6px}

/* ===== 強み（番号付き・ヘアライン区切り） ===== */
.strengths{display:grid;grid-template-columns:repeat(3,1fr)}
.strengths .item{padding:0 40px;border-left:1px solid var(--line)}
.strengths .item:first-child{padding-left:0;border-left:none}
.strengths .num{font-family:'Outfit';font-size:.8rem;letter-spacing:.2em;color:var(--brown);display:block;margin-bottom:22px}
.strengths h3{font-size:1.25rem;margin-bottom:16px;letter-spacing:.03em}
.strengths p{font-size:.9rem;font-weight:300;color:var(--ink-soft)}

/* ===== リード文 ===== */
.lead-box{max-width:780px;font-size:1.18rem;line-height:2.2;font-weight:300;letter-spacing:.02em}
.lead-box.center{margin:0 auto;text-align:center}
.lead-box strong{font-weight:500;border-bottom:2px solid var(--brown);padding-bottom:1px}

/* ===== 事業詳細（編集的・写真大） ===== */
.biz-detail{display:grid;grid-template-columns:1.1fr 1fr;gap:72px;align-items:center;padding:90px 0;border-bottom:1px solid var(--line)}
.biz-detail:last-child{border-bottom:none}
.biz-detail:nth-child(even) .biz-img{order:2}
.biz-detail .biz-img{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--bg-3)}
.biz-detail .biz-img img{width:100%;height:100%;object-fit:cover;transition:transform .9s var(--ease)}
.biz-detail:hover .biz-img img{transform:scale(1.04)}
.biz-detail .biz-img .idx{position:absolute;top:24px;left:24px;font-family:'Outfit';font-size:.72rem;letter-spacing:.2em;color:#fff;mix-blend-mode:difference;z-index:2}
.biz-detail .en{display:block;color:var(--brown);font-size:.72rem;margin-bottom:12px}
.biz-detail h3{font-size:1.9rem;margin-bottom:14px;letter-spacing:.04em}
.biz-detail .catch{color:var(--ink-soft);font-weight:300;font-size:1.05rem;margin-bottom:24px}
.biz-detail ul{list-style:none;margin:24px 0}
.biz-detail ul li{padding:14px 0;border-bottom:1px solid var(--line);font-size:.92rem;display:flex;gap:14px;align-items:baseline}
.biz-detail ul li::before{content:"—";color:var(--brown)}
.recommend{font-size:.86rem;color:var(--ink-soft);margin-top:24px;font-weight:300}
.recommend strong{color:var(--brown);font-weight:500}

/* ===== 施工事例ギャラリー ===== */
.filters{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:52px;justify-content:center}
.filter-btn{
  padding:11px 28px;border:1px solid var(--line);background:transparent;
  font-family:'Zen Kaku Gothic New',sans-serif;font-weight:500;color:var(--muted);
  cursor:pointer;transition:.3s;font-size:.84rem;letter-spacing:.06em;
}
.filter-btn:hover{border-color:var(--ink);color:var(--ink)}
.filter-btn.active{background:var(--ink);color:#fff;border-color:var(--ink)}
.filter-btn:disabled{opacity:.4;cursor:not-allowed}
.works-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:36px 28px}
.work-item.hide{display:none}
.work-item .frame{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--bg-3)}
.work-item .frame img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--ease)}
.work-item:hover .frame img{transform:scale(1.06)}
.work-item .meta{padding:18px 2px}
.work-item .cat{font-family:'Outfit';font-size:.66rem;letter-spacing:.18em;color:var(--brown);text-transform:uppercase}
.work-item h3{font-size:1.05rem;margin:8px 0 4px;font-weight:500;letter-spacing:.03em}
.work-item p{font-size:.84rem;font-weight:300;color:var(--muted)}

/* ===== テーブル（ミニマル / ヘアラインのみ） ===== */
.info-table{width:100%;border-collapse:collapse}
.info-table th,.info-table td{padding:22px 4px;text-align:left;border-bottom:1px solid var(--line);font-size:.92rem;vertical-align:top}
.info-table th{width:30%;font-weight:500;color:var(--ink);letter-spacing:.04em}
.info-table td{font-weight:300;color:var(--ink-soft)}

/* ===== メッセージ ===== */
.message-box{max-width:820px}
.message-box p{margin-bottom:24px;font-size:1.02rem;font-weight:300;line-height:2.2}
.message-box .sign{color:var(--muted);font-size:.86rem;margin-top:32px;font-family:'Outfit';letter-spacing:.08em}

/* ===== 採用：人材像 ===== */
.persona-grid{display:grid;grid-template-columns:repeat(3,1fr)}
.persona{padding:0 40px;border-left:1px solid var(--line)}
.persona:first-child{padding-left:0;border-left:none}
.persona .en{font-size:.68rem;color:var(--brown);display:block;margin-bottom:14px}
.persona h3{font-size:1.15rem;margin-bottom:14px;letter-spacing:.03em}
.persona p{font-size:.88rem;font-weight:300;color:var(--ink-soft)}

/* 採用特集バナー（写真背景） */
.feature-banner{position:relative;overflow:hidden;color:#fff;padding:0}
.feature-banner .bg{position:absolute;inset:0;z-index:0}
.feature-banner .bg img{width:100%;height:100%;object-fit:cover}
.feature-banner .bg::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(20,18,15,.82),rgba(20,18,15,.4))}
.feature-banner .inner{position:relative;z-index:2;padding:96px 0;max-width:600px}
.feature-banner .en{display:block;font-size:.72rem;color:#cdbf9e;margin-bottom:18px}
.feature-banner h2{font-size:2rem;line-height:1.5;margin-bottom:20px;letter-spacing:.03em}
.feature-banner p{font-weight:300;opacity:.9;margin-bottom:30px}

/* ===== お問い合わせ：分岐 ===== */
.entry-split{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line)}
.entry-card{background:var(--bg);padding:54px 44px;transition:.35s}
.entry-card:hover{background:var(--bg-2)}
.entry-card .en{font-size:.7rem;color:var(--brown);display:block;margin-bottom:16px}
.entry-card h3{font-size:1.4rem;margin-bottom:12px;letter-spacing:.03em}
.entry-card p{font-size:.9rem;font-weight:300;color:var(--ink-soft);margin-bottom:28px}

/* ===== フォーム ===== */
.form{max-width:680px}
.form-group{margin-bottom:30px}
.form-group label{display:block;font-weight:500;font-size:.84rem;letter-spacing:.05em;margin-bottom:12px}
.form-group label .req{color:var(--brown);font-size:.7rem;margin-left:8px;font-family:'Outfit'}
.form-group input,.form-group select,.form-group textarea{
  width:100%;padding:15px 0;border:none;border-bottom:1px solid var(--line);
  font-family:inherit;font-size:1rem;color:var(--ink);background:transparent;transition:border .3s;font-weight:300;
}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-bottom-color:var(--olive)}
.form-group textarea{min-height:130px;resize:vertical}
.form-group input::placeholder,.form-group textarea::placeholder{color:#c3bbad}
.form .btn{margin-top:14px}
.form-note{font-size:.78rem;color:var(--muted);margin-top:20px;font-weight:300}

.tel-box{border-top:1px solid var(--line);margin-top:64px;padding-top:48px}
.tel-box .en{font-size:.7rem;color:var(--brown);display:block;margin-bottom:14px}
.tel-box .num{font-family:'Outfit';font-size:2.4rem;font-weight:300;letter-spacing:.04em;margin:4px 0}
.tel-box .num a{display:inline-flex;align-items:center;gap:14px}
.tel-box small{color:var(--muted);font-size:.8rem;font-weight:300}

/* ===== 注記 ===== */
.note{border-left:2px solid var(--brown);padding:14px 0 14px 22px;font-size:.84rem;color:var(--muted);margin-top:40px;font-weight:300}

/* ===== CTA帯（暗・ミニマル） ===== */
.cta-band{background:var(--ink);color:#fff;text-align:center;padding:130px 0}
.cta-band .en{display:block;color:#b9a986;font-size:.74rem;margin-bottom:22px}
.cta-band h2{font-size:2.2rem;margin-bottom:18px;font-weight:700;letter-spacing:.04em}
.cta-band p{margin-bottom:40px;color:#c9c2b6;font-weight:300}
.cta-band .btns{display:flex;gap:18px;justify-content:center;flex-wrap:wrap}

/* ===== フッター ===== */
footer{background:var(--ink);color:#9a9183;padding:0 0 40px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:48px;padding:80px 0 56px;border-top:1px solid rgba(255,255,255,.1)}
.footer-brand .name{font-family:'Outfit';font-weight:600;font-size:1.4rem;letter-spacing:.12em;color:#fff;margin-bottom:18px}
.footer-brand p{max-width:26em;font-size:.85rem;font-weight:300;line-height:1.95}
.footer-col h4{color:#fff;font-size:.72rem;letter-spacing:.12em;font-family:'Outfit';text-transform:uppercase;margin-bottom:20px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:13px}
.footer-col a{font-size:.85rem;font-weight:300;transition:color .25s}
.footer-col a:hover{color:#fff}
.footer-bottom{text-align:center;font-family:'Outfit';font-size:.7rem;letter-spacing:.1em;color:#6f675b;padding-top:32px;border-top:1px solid rgba(255,255,255,.07)}

/* ===== 追従CTA（モバイル） ===== */
.sticky-cta{display:none}

/* ===== reveal アニメ ===== */
.reveal{opacity:0;transform:translateY(28px);transition:.9s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ===== レスポンシブ ===== */
@media(max-width:980px){
  .section{padding:88px 0}
  .biz-cards{grid-template-columns:repeat(2,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .biz-detail{grid-template-columns:1fr;gap:36px;padding:60px 0}
  .biz-detail:nth-child(even) .biz-img{order:0}
  .strengths,.persona-grid{grid-template-columns:1fr;gap:0}
  .strengths .item,.persona{padding:36px 0;border-left:none;border-top:1px solid var(--line)}
  .strengths .item:first-child,.persona:first-child{border-top:none;padding-top:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media(max-width:640px){
  body{font-size:15px}
  .container{padding:0 22px}
  .section{padding:64px 0}
  .sec-head{margin-bottom:44px}
  .sec-head h2,.cta-band h2,.feature-banner h2{font-size:1.6rem}
  .nav{height:68px}
  .nav-links{
    position:fixed;inset:0 0 auto 0;top:0;height:100vh;background:var(--ink);
    flex-direction:column;justify-content:center;align-items:center;gap:8px;
    transform:translateX(100%);transition:transform .45s var(--ease);
  }
  .nav-links.open{transform:none}
  .nav-links a{color:#fff !important;font-size:1.1rem;padding:14px;opacity:1}
  .nav-cta{margin-top:16px}
  .hamburger{display:flex}
  .nav-links.open ~ .hamburger span,.hamburger.x span{background:#fff}
  .grid-2{gap:36px}
  .biz-cards{grid-template-columns:1fr}
  .grid-4,.works-grid{grid-template-columns:1fr}
  .entry-split{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero{height:88vh}
  .lead-box{font-size:1.05rem}
  .feature-banner .inner{padding:64px 0}
  .tel-box .num{font-size:1.8rem}
  .sticky-cta{
    display:flex;position:fixed;bottom:0;left:0;right:0;z-index:90;border-top:1px solid rgba(255,255,255,.1);
  }
  .sticky-cta a{flex:1;text-align:center;padding:16px;font-family:'Zen Kaku Gothic New';font-weight:500;font-size:.86rem;color:#fff;letter-spacing:.04em}
  .sticky-cta .tel{background:var(--ink)}
  .sticky-cta .fm{background:var(--olive)}
  body{padding-bottom:54px}
}