:root{
  --bg:#FFFFFF;
  --bg-soft:#F5F6F4;
  --line:#E3E5E1;
  --green:#123A2C;
  --green-2:#1F5C46;
  --gray:#8A9089;
  --gray-soft:#EFF1EE;
  --text:#2A2E2A;
  --text-dim:#6E736D;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);color:var(--text);
  font-family:'Noto Sans JP',sans-serif;font-weight:400;
  line-height:1.9;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
.en{font-family:'Montserrat',sans-serif;}
h1,h2,h3{font-family:'Noto Sans JP',sans-serif;font-weight:700;letter-spacing:0.02em;color:var(--text);}
a{color:inherit;text-decoration:none;}
img{display:block;max-width:100%;}
.wrap{max-width:1400px;margin:0 auto;padding:0 48px;}

/* HEADER */
header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,0.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;}
.logo{display:flex;align-items:center;gap:10px;}
.logo-text{font-family:'Noto Sans JP',sans-serif;font-weight:700;font-size:19px;letter-spacing:0.08em;color:var(--green);}
nav ul{display:flex;gap:34px;list-style:none;}
nav ul li a{font-size:12.5px;letter-spacing:0.08em;color:var(--text-dim);transition:color .2s;}
nav ul li a:hover{color:var(--green);}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 30px;font-size:13px;letter-spacing:0.06em;transition:all .25s;border:1px solid transparent;font-weight:500;}
.btn-fill{background:var(--green);color:#fff;}
.btn-fill:hover{background:var(--green-2);}
.btn-line{border-color:var(--line);color:var(--text);}
.btn-line:hover{border-color:var(--green);color:var(--green);}

/* HERO — 左右分割: 左=ロゴ+ターミナル背景 / 右=大見出し */
.hero{position:relative;min-height:100vh;display:flex;flex-direction:column;justify-content:center;border-bottom:1px solid var(--line);overflow:hidden;padding:0;}
.hero-split{position:relative;display:grid;grid-template-columns:1fr 1.1fr;align-items:stretch;gap:20px;min-height:100vh;}
.hero-left{position:relative;display:flex;align-items:center;justify-content:center;min-height:100vh;height:100%;overflow:hidden;}
.hero-logo{position:relative;z-index:1;height:clamp(220px,26vw,420px);width:auto;max-width:90%;}
.circuit-bg{position:absolute;top:0;left:0;right:0;bottom:0;z-index:5;overflow:hidden;pointer-events:none;}
.circuit-row{position:absolute;left:0;top:0;white-space:nowrap;font-family:'JetBrains Mono',monospace;font-size:12.5px;letter-spacing:0.02em;transition:top .35s ease, opacity .4s ease;}
.circuit-row.align-right{left:auto;right:0;}

/* 簡易説明（HOME・右側にターミナル背景を右揃えで配置） */
.intro-grid{display:grid;grid-template-columns:1.1fr 0.9fr;gap:40px;align-items:center;min-height:260px;}
.intro-term{position:relative;height:100%;min-height:220px;overflow:hidden;pointer-events:none;}
.hero-right{position:relative;display:flex;flex-direction:column;justify-content:center;}
.hero-h1{font-family:'Noto Serif JP',serif;font-weight:700;line-height:1.15;}
.hero-h1 .l1{display:block;font-size:clamp(32px,4.5vw,67px);color:var(--text);white-space:nowrap;}
.hero-h1 .l2{display:block;font-size:clamp(32px,4.5vw,67px);color:#E88A1F;margin-left:14%;margin-top:8px;white-space:nowrap;}
.hero-sub-wrap{position:relative;z-index:1;margin-top:56px;}
.hero-sub-wrap .eyebrow{font-family:'Montserrat',sans-serif;font-size:11px;color:var(--green);letter-spacing:0.22em;margin-bottom:14px;font-weight:600;}
.hero-sub-text{font-size:14.5px;color:var(--text-dim);max-width:640px;line-height:2;}

/* SECTION */
.section{padding:100px 0;border-bottom:1px solid var(--line);}
.section.soft{background:var(--bg-soft);}
.sec-head{margin-bottom:50px;max-width:640px;}
.sec-head.between{display:flex;justify-content:space-between;align-items:flex-end;max-width:none;flex-wrap:wrap;gap:16px;}
.sec-head .eyebrow{font-family:'Montserrat',sans-serif;font-size:11px;color:var(--green);letter-spacing:0.2em;margin-bottom:14px;font-weight:600;}
.sec-head h2{font-size:clamp(22px,2.8vw,30px);line-height:1.6;font-weight:700;}
.sec-head p{font-size:13.5px;color:var(--text-dim);margin-top:16px;}
.link-more{font-family:'Montserrat';font-size:12px;color:var(--green);letter-spacing:0.08em;font-weight:600;white-space:nowrap;padding-bottom:6px;}
.link-more:hover{color:var(--green-2);}

/* ページ見出し（下層ページ共通） */
.page-head{padding:140px 0 60px;}
.page-head .eyebrow{font-family:'Montserrat';font-size:11px;color:var(--green);letter-spacing:0.2em;margin-bottom:16px;font-weight:600;}
.page-head h1{font-size:clamp(28px,3.6vw,42px);font-weight:700;margin-bottom:14px;}
.page-head p{font-size:14px;color:var(--text-dim);}

nav ul li a.active{color:var(--green);}

/* ハンバーガーメニュー（モバイル） */
.hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;width:34px;height:34px;background:none;border:none;cursor:pointer;padding:0;z-index:60;}
.hamburger span{display:block;width:24px;height:2px;background:var(--text);transition:transform .25s, opacity .25s;}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.hamburger.open span:nth-child(2){opacity:0;}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.mobile-nav{display:none;position:fixed;top:72px;left:0;right:0;bottom:0;background:#fff;z-index:55;transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity .25s, transform .25s;overflow-y:auto;}
.mobile-nav.open{opacity:1;transform:translateY(0);pointer-events:auto;}
.mobile-nav ul{list-style:none;padding:20px 32px 40px;}
.mobile-nav ul li{border-bottom:1px solid var(--line);}
.mobile-nav ul li a{display:block;padding:20px 4px;font-size:15px;color:var(--text);letter-spacing:0.04em;}
.mobile-nav ul li a.active{color:var(--green);font-weight:700;}

@media(max-width:900px){
  .hamburger{display:flex;}
  nav ul{display:none;}
}

/* 代表作 PRODUCT GRID */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.prod-card{background:#fff;display:flex;flex-direction:column;}
.prod-card .ph{aspect-ratio:4/3;background:var(--bg-soft);overflow:hidden;position:relative;display:flex;align-items:center;justify-content:center;}
.prod-card .ph img{width:100%;height:100%;object-fit:contain;}
.prod-card .ph .noimg{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--gray);font-family:'Montserrat';font-size:11px;letter-spacing:0.1em;}
.prod-card .info{padding:26px 24px;flex:1;}
.prod-card .info .num{font-family:'Montserrat';font-size:11px;color:var(--gray);letter-spacing:0.1em;margin-bottom:10px;}
.prod-card .info h3{font-size:16px;margin-bottom:8px;}
.prod-card .info p{font-size:12.5px;color:var(--text-dim);line-height:1.8;}

/* 藤井工藝について */
.about-grid{display:grid;grid-template-columns:0.9fr 1.1fr;gap:60px;align-items:start;}
.about-grid .lead{font-size:16px;line-height:2;color:var(--text);font-weight:500;position:sticky;top:110px;}
.about-grid .body p{font-size:14px;color:var(--text-dim);margin-bottom:18px;}
.info-block{margin-top:56px;padding-top:32px;border-top:1px solid var(--line);display:flex;gap:48px;flex-wrap:wrap;}
.info-row{display:flex;flex-direction:column;gap:6px;}
.info-row .k{font-family:'Montserrat';font-size:11px;color:var(--green);letter-spacing:0.15em;font-weight:600;}
.info-row .v{font-size:14px;color:var(--text);}
.info-row .v a{color:var(--green);}

/* PROFILE */
.profile-grid{display:grid;grid-template-columns:320px 1fr;gap:60px;align-items:start;}
.profile-photo{aspect-ratio:3/4;overflow:hidden;background:var(--line);}
.profile-photo img{width:100%;height:100%;object-fit:cover;}
.profile-body{display:flex;flex-direction:column;gap:26px;}
.p-row{display:grid;grid-template-columns:140px 1fr;gap:20px;padding-bottom:22px;border-bottom:1px solid var(--line);}
.p-row:last-child{border-bottom:none;}
.p-k{font-family:'Montserrat';font-size:11px;color:var(--green);letter-spacing:0.12em;font-weight:600;padding-top:2px;}
.p-v{font-size:14px;color:var(--text);line-height:1.9;}

/* 事業内容（HOME・タイトルのみ） */
.biz-title-row{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.biz-title-card{background:#fff;padding:30px 26px;display:flex;align-items:center;gap:16px;transition:background .2s;}
.biz-title-card:hover{background:var(--bg-soft);}
.biz-title-card .no{font-family:'Montserrat';font-size:12px;color:var(--green);letter-spacing:0.1em;}
.biz-title-card h3{font-size:15.5px;font-weight:700;}

/* ABOUT（要点カード・about.html） */
.about-lead{font-size:16px;line-height:2;color:var(--text);font-weight:500;max-width:680px;margin-bottom:56px;}
.point-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.point-card{background:#fff;padding:34px 30px;}
.point-card .no{font-family:'Montserrat';font-size:12px;color:var(--green);letter-spacing:0.1em;margin-bottom:14px;}
.point-card h3{font-size:16px;margin-bottom:10px;}
.point-card p{font-size:13.5px;color:var(--text-dim);line-height:1.85;}

/* 製品一覧 */
.order-note{display:flex;gap:1px;background:var(--line);border:1px solid var(--line);flex-wrap:wrap;}
.on-item{flex:1;min-width:240px;background:#fff;padding:20px 24px;display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--text);}
.on-item .k{font-family:'Montserrat';font-size:10.5px;color:var(--green);letter-spacing:0.15em;font-weight:600;}
.item-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:24px;}
.item-card{background:#fff;border:1px solid var(--line);padding:0 0 32px;display:flex;flex-direction:column;overflow:hidden;}
.i-photo{aspect-ratio:4/3;background:var(--bg-soft);display:flex;align-items:center;justify-content:center;overflow:hidden;margin-bottom:26px;}
.i-photo img{width:100%;height:100%;object-fit:contain;}
.i-photo .noimg{color:var(--gray);font-family:'Montserrat';font-size:11px;letter-spacing:0.1em;}
.item-card .i-head,.item-card .i-desc,.item-card .i-notes{margin-left:30px;margin-right:30px;}
.i-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:16px;flex-wrap:wrap;}
.i-head h3{font-size:16.5px;line-height:1.5;}
.i-head .price{font-family:'Montserrat';font-size:16px;font-weight:700;color:var(--green);white-space:nowrap;}
.i-desc{font-size:13.5px;color:var(--text-dim);line-height:1.9;margin-bottom:18px;flex:1;}
.i-notes{list-style:none;padding-top:16px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:8px;}
.i-notes li{font-size:12px;color:var(--text-dim);padding-left:16px;position:relative;line-height:1.7;}
.i-notes li::before{content:"※";position:absolute;left:0;color:var(--gray);}

/* リンク化した代表作カード */
a.prod-card{transition:box-shadow .25s, transform .25s;}
a.prod-card:hover{box-shadow:0 8px 28px rgba(18,58,44,0.10);transform:translateY(-2px);}

/* アプリ開発ページ */
.app-shots{display:grid;grid-template-columns:1.4fr 1fr;gap:24px;margin-bottom:56px;align-items:start;}
.app-shots img{width:100%;border:1px solid var(--line);background:#111;}
.app-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;margin-bottom:56px;}
.app-desc h3{font-size:19px;margin-bottom:16px;line-height:1.7;}
.app-desc p{font-size:14px;color:var(--text-dim);line-height:2;}
.app-features{display:flex;flex-direction:column;gap:1px;background:var(--line);border:1px solid var(--line);}
.feat{background:#fff;padding:22px 26px;}
.feat h4{font-family:'Montserrat';font-size:11.5px;color:var(--green);letter-spacing:0.12em;margin-bottom:8px;font-weight:700;}
.feat p{font-size:13px;color:var(--text-dim);line-height:1.85;}
.app-env{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.env-col{background:var(--bg-soft);border:1px solid var(--line);padding:28px 30px;}
.env-col h4{font-size:15px;margin-bottom:16px;}
.rb-asterisk{font-size:11.5px;color:var(--text-dim);margin-top:10px;}

/* トピック（HOME） */
.topic-list{display:flex;flex-direction:column;gap:1px;background:var(--line);border:1px solid var(--line);}
.topic-item{background:#fff;padding:26px 32px;display:grid;grid-template-columns:130px 1fr;gap:24px;align-items:start;}
.t-date{font-family:'Montserrat';font-size:13px;font-weight:600;color:var(--green);padding-top:2px;}
.t-body h3{font-size:15.5px;margin-bottom:6px;}
.t-body p{font-size:13px;color:var(--text-dim);line-height:1.9;}
.t-body a{color:var(--green);border-bottom:1px solid var(--green);padding-bottom:1px;}

/* カテゴリ共通注意事項（製品一覧） */
.cat-notes{margin-top:28px;background:#fff;border:1px solid var(--line);padding:26px 30px;}
.cat-notes h4{font-size:14px;margin-bottom:14px;color:var(--text);}
.cat-notes .i-notes{padding-top:0;border-top:none;}

/* 売り切れバッジ */
.sold-badge{display:inline-block;background:var(--gray);color:#fff;font-size:12px;font-weight:700;letter-spacing:0.08em;padding:5px 14px;}

/* お客様の設計 リターンプログラム */
.return-box{border:1px solid var(--green);background:#fff;}
.rb-head{background:var(--green);color:#fff;padding:26px 34px;}
.rb-head .rb-label{font-family:'Montserrat';font-size:10.5px;letter-spacing:0.2em;opacity:0.7;display:block;margin-bottom:8px;}
.rb-head h3{color:#fff;font-size:20px;}
.rb-body{padding:34px;}
.rb-formula{display:flex;flex-direction:column;gap:8px;margin-bottom:26px;font-family:'JetBrains Mono',monospace;}
.rb-formula .f-line{font-size:14.5px;color:var(--text);}
.rb-formula .f-line.dim{color:var(--green);font-weight:700;}
.rb-example{background:var(--bg-soft);padding:22px 26px;margin-bottom:20px;}
.rb-example .ex-title{font-family:'Montserrat';font-size:10.5px;color:var(--green);letter-spacing:0.15em;font-weight:600;margin-bottom:10px;}
.rb-example p{font-size:14px;line-height:2;color:var(--text);}
.rb-example strong{color:var(--green);font-size:16px;}
.rb-note{font-size:12.5px;color:var(--text-dim);}

/* 開発依頼 フロー */
.flow-list{display:flex;flex-direction:column;gap:1px;background:var(--line);border:1px solid var(--line);}
.flow-item{background:#fff;padding:34px 36px;display:grid;grid-template-columns:70px 1fr;gap:24px;align-items:start;}
.f-no{font-family:'Montserrat';font-size:22px;font-weight:700;color:var(--green);}
.f-body h3{font-size:16.5px;margin-bottom:8px;}
.f-body p{font-size:13.5px;color:var(--text-dim);line-height:1.9;}

/* 価格の目安 */
.price-table{border:1px solid var(--line);}
.pt-row{display:flex;justify-content:space-between;align-items:center;padding:22px 30px;border-bottom:1px solid var(--line);background:#fff;gap:16px;flex-wrap:wrap;}
.pt-row:last-child{border-bottom:none;}
.pt-item{font-size:14.5px;font-weight:500;color:var(--text);}
.pt-price{font-family:'Montserrat';font-size:15px;font-weight:700;color:var(--green);}

/* 材料 */
.mat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.mat-card{background:#fff;padding:30px 26px;}
.mat-card h3{font-size:15.5px;margin-bottom:10px;font-family:'Montserrat','Noto Sans JP',sans-serif;}
.mat-card p{font-size:12.5px;color:var(--text-dim);line-height:1.8;}

/* お問い合わせ */
.contact-grid2{display:grid;grid-template-columns:1.3fr 0.7fr;gap:48px;align-items:start;}
.contact-main{display:flex;flex-direction:column;gap:48px;}
.c-block .eyebrow{font-family:'Montserrat';font-size:11px;color:var(--green);letter-spacing:0.2em;margin-bottom:12px;font-weight:600;}
.c-block h3{font-size:18px;margin-bottom:10px;}
.c-block p{font-size:13.5px;color:var(--text-dim);line-height:1.9;}
.mail-link{display:inline-block;font-family:'JetBrains Mono',monospace;font-size:19px;color:var(--green);margin-top:14px;border-bottom:1px solid var(--green);padding-bottom:2px;}
.contact-side{display:flex;flex-direction:column;gap:24px;}
.side-box{background:var(--bg-soft);border:1px solid var(--line);padding:28px 26px;}
.side-box h3{font-size:15px;margin-bottom:14px;}

/* 事業内容 */
.biz-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);}
.biz-card{background:#fff;padding:38px 30px;}
.biz-card .no{font-family:'Montserrat';font-size:12px;color:var(--green);letter-spacing:0.1em;margin-bottom:20px;}
.biz-card h3{font-size:17px;margin-bottom:14px;}
.biz-card p{font-size:13px;color:var(--text-dim);}

/* 制作実績 */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.gallery .g-item{aspect-ratio:4/5;background:var(--bg-soft);overflow:hidden;position:relative;}
.gallery .g-item img{width:100%;height:100%;object-fit:cover;transition:.4s;}
.gallery .g-item:hover img{transform:scale(1.04);}
.gallery .g-item .noimg{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:var(--gray);font-family:'Montserrat';font-size:11px;letter-spacing:0.1em;}

/* お問い合わせ */
.contact-cta{text-align:center;max-width:560px;margin:0 auto;}
.contact-cta h2{font-size:clamp(24px,3vw,32px);margin-bottom:18px;line-height:1.6;}
.contact-cta p{font-size:14px;color:var(--text-dim);margin-bottom:36px;}

/* FOOTER */
footer{padding:44px 0;background:var(--green);}
.foot{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px;}
.foot .c{font-family:'Montserrat';font-size:11px;color:rgba(255,255,255,0.6);letter-spacing:0.05em;}
.foot .sns{display:flex;gap:20px;}
.foot .sns a{font-size:12px;color:rgba(255,255,255,0.7);transition:.2s;}
.foot .sns a:hover{color:#fff;}

@media(max-width:900px){
  .prod-grid,.biz-grid,.gallery,.biz-title-row,.point-grid,.mat-row{grid-template-columns:1fr;}
  .item-grid{grid-template-columns:1fr;}
  .app-shots,.app-grid,.app-env{grid-template-columns:1fr;}
  .contact-grid2{grid-template-columns:1fr;gap:32px;}
  .flow-item{grid-template-columns:1fr;gap:10px;padding:28px 24px;}
  .topic-item{grid-template-columns:1fr;gap:8px;padding:22px 24px;}
  .about-grid{grid-template-columns:1fr;gap:32px;}
  .about-grid .lead{position:static;}
  .profile-grid{grid-template-columns:1fr;gap:32px;}
  .profile-photo{max-width:320px;}
  .p-row{grid-template-columns:1fr;gap:6px;}
  .hero-split{grid-template-columns:1fr;min-height:auto;}
  .hero-left{min-height:60vh;}
  .intro-grid{grid-template-columns:1fr;}
  .intro-term{display:none;}
  nav ul{display:none;}
}