:root{
  --yellow:#ffd400; --red:#e8380d; --black:#101010; --white:#fff; --gray:#f4f4f4;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Hiragino Sans","Hiragino Kaku Gothic ProN",sans-serif;color:var(--black);background:var(--white);line-height:1.7;overflow-x:hidden}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
.wrap{width:min(1180px,92%);margin:0 auto}

/* ===== 警告ストライプ帯 ===== */
.stripe{height:8px;background:repeating-linear-gradient(-45deg,var(--yellow) 0 14px,var(--black) 14px 28px)}

/* ===== ヘッダー ===== */
header{position:sticky;top:0;z-index:100;background:var(--black)}
.nav{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;gap:12px;color:var(--white);font-weight:900;font-size:1.25rem;letter-spacing:.04em}
.logo .mark{width:30px;height:30px;background:var(--yellow);flex:none}
.menu{display:flex;align-items:center;gap:28px;list-style:none}
.menu a{color:var(--white);font-weight:900;letter-spacing:.04em;font-size:.98rem;padding:6px 0}
.menu a.current{color:var(--yellow);border-bottom:3px solid var(--yellow)}
.menu a.btn-contact{background:var(--red);color:var(--white);padding:12px 20px}
.menu a.btn-contact:hover{background:#fff;color:var(--red)}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.burger span{width:28px;height:3px;background:var(--white);display:block}

/* ===== ボタン ===== */
.btn{display:inline-flex;align-items:center;gap:10px;background:var(--red);color:var(--white);font-weight:900;letter-spacing:.04em;padding:16px 30px;border:0;cursor:pointer;font-size:1rem;transition:.2s}
.btn:hover{background:var(--black)}
.btn.ghost{background:transparent;border:3px solid var(--white)}
.btn.ghost:hover{background:var(--white);color:var(--black)}

/* ===== ヒーロー ===== */
.hero{position:relative;min-height:88vh;display:flex;align-items:center;color:var(--white);background-position:center;background-size:cover;background-repeat:no-repeat}
.hero::before{content:"";position:absolute;inset:0;background:rgba(0,0,0,.55)}
.hero .wrap{position:relative;z-index:2;padding:60px 0}
.hero .tag{display:inline-block;background:var(--yellow);color:var(--black);font-weight:900;letter-spacing:.06em;padding:8px 18px;margin-bottom:22px;font-size:.95rem}
.hero h1{font-size:clamp(3rem,8vw,6.5rem);font-weight:900;letter-spacing:.04em;line-height:1.05;text-shadow:0 4px 24px rgba(0,0,0,.4)}
.hero p.sub{font-size:clamp(1rem,2.2vw,1.4rem);font-weight:700;margin:24px 0 36px;max-width:640px}
.hero .cta{display:flex;gap:16px;flex-wrap:wrap}

/* ===== ページタイトルヒーロー（下層）===== */
.pagehero{position:relative;min-height:46vh;display:flex;align-items:center;color:var(--white);background-position:center;background-size:cover;background-repeat:no-repeat}
.pagehero::before{content:"";position:absolute;inset:0;background:rgba(0,0,0,.6)}
.pagehero .wrap{position:relative;z-index:2;padding:70px 0}
.pagehero .en{display:block;font-size:clamp(2.4rem,7vw,4.5rem);font-weight:900;letter-spacing:.06em;color:transparent;-webkit-text-stroke:2px var(--yellow);line-height:1}
.pagehero h1{font-size:clamp(1.8rem,4.5vw,2.8rem);font-weight:900;letter-spacing:.06em;margin-top:8px}
.pagehero h1::before{content:"";display:inline-block;width:40px;height:8px;background:var(--red);margin-right:14px;vertical-align:middle}

/* ===== セクション共通 ===== */
section{position:relative}
.sec-pad{padding:90px 0}
.sec-head{position:relative;margin-bottom:50px}
.sec-head .ghosttext{position:absolute;top:-46px;left:-6px;font-size:clamp(4rem,11vw,8rem);font-weight:900;-webkit-text-stroke:1px rgba(0,0,0,.12);color:transparent;letter-spacing:.04em;z-index:0;white-space:nowrap;pointer-events:none}
.sec-head h2{position:relative;font-size:clamp(1.8rem,4vw,2.6rem);font-weight:900;letter-spacing:.04em;z-index:1}
.sec-head h2::after{content:"";display:block;width:60px;height:6px;background:var(--red);margin-top:16px}

/* ===== 数字 ===== */
.stats{background:var(--black);color:var(--white)}
.stats .grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stats .num{font-size:clamp(2.6rem,6vw,4.2rem);font-weight:900;color:var(--red);letter-spacing:.02em;line-height:1;white-space:nowrap}
.stats .num small{font-size:.4em;color:var(--yellow);margin-left:4px}
.stats .lbl{margin-top:10px;font-weight:700;letter-spacing:.04em;font-size:.95rem}

/* ===== 事業カード ===== */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{background:var(--white);border:2px solid var(--black);display:flex;flex-direction:column;transition:.2s}
.card:hover{transform:translateY(-6px)}
.card .ph{aspect-ratio:4/3;overflow:hidden}
.card .ph img{width:100%;height:100%;object-fit:cover;transition:.4s}
.card:hover .ph img{transform:scale(1.08)}
.card .body{padding:22px;flex:1;display:flex;flex-direction:column}
.card .body h3{font-size:1.3rem;font-weight:900;letter-spacing:.04em;margin-bottom:10px}
.card .body p{font-size:.95rem;color:#333;flex:1}
.card .body .more{margin-top:16px;font-weight:900;color:var(--red)}

/* ===== 施工実績ハイライト ===== */
.gray{background:var(--gray)}
.works-hl{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.works-hl a{position:relative;aspect-ratio:4/3;overflow:hidden;display:block}
.works-hl img{width:100%;height:100%;object-fit:cover;transition:.4s}
.works-hl a:hover img{transform:scale(1.08)}
.works-hl .cap{position:absolute;left:0;bottom:0;background:var(--black);color:var(--white);font-weight:900;font-size:.85rem;padding:8px 14px;letter-spacing:.03em}

/* ===== 強み（黄色ブロック）===== */
.promise{background:var(--yellow)}
.promise .grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.promise .blk{background:var(--black);color:var(--white);padding:34px 26px;clip-path:polygon(0 0,100% 0,100% 100%,0 calc(100% - 22px))}
.promise .blk .n{color:var(--yellow);font-weight:900;font-size:1rem;letter-spacing:.1em}
.promise .blk h3{font-size:1.7rem;font-weight:900;letter-spacing:.04em;margin:8px 0 12px}
.promise .blk p{font-size:.92rem;color:#ddd}

/* ===== CTAバンド ===== */
.ctaband{background:var(--red);color:var(--white);text-align:center;clip-path:polygon(0 22px,100% 0,100% 100%,0 100%)}
.ctaband h2{font-size:clamp(1.6rem,4vw,2.5rem);font-weight:900;letter-spacing:.04em;line-height:1.3}
.ctaband .tel{font-size:clamp(2.4rem,7vw,4rem);font-weight:900;letter-spacing:.02em;margin:16px 0 6px;display:inline-block}
.ctaband .hours{font-weight:700;margin-bottom:26px}
.ctaband .btn{background:var(--black)}
.ctaband .btn:hover{background:var(--white);color:var(--black)}
.ctaband.small{clip-path:none;padding:70px 0}

/* ===== services: 交互レイアウト ===== */
.svc{display:grid;grid-template-columns:1fr 1fr;gap:0;align-items:stretch;margin-bottom:70px}
.svc .ph{overflow:hidden;min-height:340px}
.svc .ph img{width:100%;height:100%;object-fit:cover}
.svc .txt{padding:44px;display:flex;flex-direction:column;justify-content:center}
.svc.alt .ph{order:2}
.svc.alt .txt{order:1}
.svc .no{font-weight:900;color:var(--red);font-size:1.1rem;letter-spacing:.1em}
.svc h3{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:900;letter-spacing:.04em;margin:6px 0 16px}
.svc p{color:#333;margin-bottom:18px}
.svc .tags{display:flex;flex-wrap:wrap;gap:8px}
.svc .tags span{background:var(--black);color:var(--white);font-weight:700;font-size:.82rem;padding:6px 14px;letter-spacing:.03em}

/* ===== 施工の流れ ===== */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;counter-reset:step}
.flow .step{position:relative;background:var(--gray);border-top:6px solid var(--red);padding:26px 18px}
.flow .step .n{position:absolute;top:-18px;right:14px;font-size:2.4rem;font-weight:900;color:var(--red);opacity:.25;line-height:1}
.flow .step h4{font-weight:900;letter-spacing:.03em;font-size:1.05rem;margin-bottom:8px}
.flow .step p{font-size:.85rem;color:#444}

/* ===== works: 実績グリッド ===== */
.wgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.wcard{border:2px solid var(--black);background:var(--white);overflow:hidden;transition:.2s;display:flex;flex-direction:column}
.wcard:hover{transform:translateY(-6px)}
.wcard .ph{aspect-ratio:4/3;overflow:hidden;position:relative}
.wcard .ph img{width:100%;height:100%;object-fit:cover;transition:.5s}
.wcard:hover .ph img{transform:scale(1.12)}
.wcard .badge{position:absolute;top:12px;left:12px;color:var(--white);font-weight:900;font-size:.78rem;padding:5px 12px;letter-spacing:.04em}
.badge.doboku{background:#e8380d}
.badge.kenchiku{background:#101010}
.badge.reform{background:#0a7d2c}
.badge.koukyou{background:#1153c9}
.wcard .body{padding:18px}
.wcard .body h3{font-size:1.12rem;font-weight:900;letter-spacing:.03em;line-height:1.5}
.wcard .body .year{margin-top:8px;font-weight:700;color:#666;font-size:.85rem}

/* ===== company: 代表挨拶 ===== */
.greet{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center}
.greet .txt h2{font-size:clamp(1.6rem,4vw,2.4rem);font-weight:900;letter-spacing:.04em;margin-bottom:18px}
.greet .txt h2::after{content:"";display:block;width:56px;height:6px;background:var(--red);margin-top:14px}
.greet .txt p{color:#333;margin-bottom:14px}
.greet .txt .sign{font-weight:900;font-size:1.15rem;letter-spacing:.05em;margin-top:8px}
.greet .ph img{width:100%;aspect-ratio:3/4;object-fit:cover}

/* ===== 会社概要テーブル ===== */
.tbl{width:100%;border-collapse:collapse}
.tbl th,.tbl td{text-align:left;padding:16px 18px;border-bottom:1px solid #ddd;font-size:.95rem;vertical-align:top}
.tbl th{width:200px;background:var(--black);color:var(--white);font-weight:900;letter-spacing:.04em}

/* ===== 沿革タイムライン ===== */
.tl{list-style:none;position:relative;padding-left:34px}
.tl::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:3px;background:var(--black)}
.tl li{position:relative;padding:0 0 30px 8px}
.tl li::before{content:"";position:absolute;left:-32px;top:4px;width:16px;height:16px;border-radius:50%;background:var(--yellow);border:3px solid var(--black)}
.tl .yr{font-weight:900;color:var(--red);font-size:1.05rem;letter-spacing:.04em}
.tl .ev{font-weight:700}

/* ===== 採用バンド ===== */
.recruit{background:var(--black);color:var(--white);text-align:center;padding:70px 0}
.recruit h2{font-size:clamp(1.5rem,4vw,2.4rem);font-weight:900;letter-spacing:.04em}
.recruit .stripe-line{height:8px;background:repeating-linear-gradient(-45deg,var(--yellow) 0 14px,var(--black) 14px 28px);width:120px;margin:20px auto 0}

/* ===== お問い合わせ ===== */
.contact{display:grid;grid-template-columns:1.4fr 1fr;gap:40px}
.form label{display:block;font-weight:900;letter-spacing:.03em;margin:0 0 6px}
.form .field{margin-bottom:20px}
.form input,.form select,.form textarea{width:100%;padding:13px 14px;border:2px solid var(--black);font-family:inherit;font-size:1rem;background:var(--white)}
.form textarea{min-height:140px;resize:vertical}
.form .note{font-size:.82rem;color:#888;margin-top:6px}
.callbox{background:var(--black);color:var(--white);padding:36px 28px;display:flex;flex-direction:column;justify-content:center}
.callbox .lbl{font-weight:900;color:var(--yellow);letter-spacing:.06em}
.callbox .tel{white-space:nowrap;font-size:clamp(1.6rem,2.2vw,2.2rem);font-weight:900;letter-spacing:.02em;margin:8px 0;display:inline-block}
.callbox .hours{font-weight:700}

/* ===== フッター ===== */
footer{background:var(--black);color:#ccc}
footer .inner{padding:56px 0 30px}
footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px}
footer h4{color:var(--white);font-weight:900;letter-spacing:.04em;font-size:1.2rem;margin-bottom:14px;display:flex;align-items:center;gap:10px}
footer h4 .mark{width:22px;height:22px;background:var(--yellow);flex:none}
footer p{font-size:.9rem;line-height:1.9}
footer ul{list-style:none}
footer ul li{margin-bottom:8px}
footer ul a{font-size:.9rem}
footer ul a:hover{color:var(--yellow)}
footer .copy{border-top:1px solid #333;margin-top:36px;padding-top:20px;font-size:.82rem;color:#888;text-align:center}

@media(max-width:900px){
  .menu{position:fixed;top:70px;right:0;height:calc(100vh - 70px);width:min(78%,320px);background:var(--black);flex-direction:column;align-items:flex-start;gap:0;padding:24px;transform:translateX(100%);transition:.3s;box-shadow:-10px 0 30px rgba(0,0,0,.4)}
  .menu.open{transform:translateX(0)}
  .menu li{width:100%}
  .menu a{display:block;padding:16px 0;width:100%;border-bottom:1px solid #333}
  .menu a.current{border-bottom:3px solid var(--yellow)}
  .menu a.btn-contact{margin-top:16px;text-align:center;border-bottom:0}
  .burger{display:flex}
  .stats .grid{grid-template-columns:repeat(2,1fr);gap:34px 20px}
  .cards{grid-template-columns:1fr}
  .works-hl{grid-template-columns:1fr 1fr}
  .promise .grid{grid-template-columns:1fr}
  .svc{grid-template-columns:1fr}
  .svc.alt .ph{order:0}
  .svc.alt .txt{order:0}
  .flow{grid-template-columns:1fr 1fr}
  .wgrid{grid-template-columns:1fr 1fr}
  .greet{grid-template-columns:1fr}
  .contact{grid-template-columns:1fr}
  .tbl th{width:130px}
  footer .cols{grid-template-columns:1fr}
}
@media(max-width:520px){
  .works-hl{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr}
  .wgrid{grid-template-columns:1fr}
}