:root{
  --green:#1d6b3f;        /* メインの緑（濃） */
  --green-2:#2f8d57;      /* 中間の緑 */
  --green-light:#5cc488;  /* 明るい緑アクセント */
  --green-pale:#f1f8f3;   /* ごく薄い緑（背景の差し色） */
  --green-pale2:#e6f2ea;
  --ink:#1f2a23;          /* 文字色（黒に近い緑グレー） */
  --gray:#5f6f66;
  --line:#dfeae3;
  --white:#fff;
  --maxw:1120px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans JP",sans-serif;
  color:var(--ink);
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  background:var(--white);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:15px 38px;border-radius:3px;font-weight:700;font-size:.95rem;
  letter-spacing:.05em;transition:.25s;border:2px solid transparent;
}
.btn--primary{background:var(--green);color:#fff}
.btn--primary:hover{background:var(--green-2);transform:translateY(-2px)}
.btn--ghost{border-color:var(--green);color:var(--green)}
.btn--ghost:hover{background:var(--green);color:#fff}
.btn--lg{padding:18px 56px;font-size:1.05rem}

/* ===== Header ===== */
.header{
  position:fixed;top:0;left:0;width:100%;z-index:100;
  background:rgba(255,255,255,.96);backdrop-filter:blur(6px);
  border-bottom:1px solid var(--line);
}
.header__inner{
  max-width:1240px;margin:0 auto;padding:0 24px;height:74px;
  display:flex;align-items:center;gap:32px;
}
.logo{display:flex;flex-direction:column;line-height:1.1;color:var(--green)}
.logo__mark{font-size:1.35rem;font-weight:900;letter-spacing:.08em}
.logo__sub{font-family:"Oswald",sans-serif;font-size:.62rem;letter-spacing:.18em;color:var(--green-2);margin-top:3px}
.gnav{margin-left:auto;display:flex;align-items:center;gap:22px}
.gnav a{color:var(--ink);font-size:.92rem;font-weight:500;transition:.2s}
.gnav a:hover{color:var(--green)}
.gnav__cta{
  background:var(--green);color:#fff!important;
  padding:10px 22px;border-radius:3px;font-weight:700;
}
.gnav__cta:hover{background:var(--green-2)}
.header__tel{display:flex;flex-direction:column;text-align:right;line-height:1.2}
.header__tel-label{font-size:.62rem;color:var(--gray);letter-spacing:.05em}
.header__tel a{font-family:"Oswald",sans-serif;color:var(--green);font-size:1.25rem;font-weight:600}
.hamburger{display:none}

/* ===== Hero（全画面ビジュアル＋スライドショー） ===== */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:flex-end;
  color:#fff;overflow:hidden;background:#0f3a24;
}
.hero__slider{position:absolute;inset:0;z-index:0}
.hero__slide{
  position:absolute;inset:0;background-size:cover;background-position:center;
  opacity:0;animation:heroFade 21s infinite;
}
/* 実写真：images/ に保存。url が無ければ下のグラデーションが背景になります */
.hero__slide--1{
  background-image:url('images/hero-trucks.jpg'),radial-gradient(circle at 70% 35%,#2f8d57,#0f3a24 75%);
  animation-delay:0s;
}
.hero__slide--2{
  background-image:url('images/site-tunnel.jpg'),radial-gradient(circle at 30% 60%,#5a8a33,#16331a 75%);
  animation-delay:7s;
}
.hero__slide--3{
  background-image:url('images/site-loading.jpg'),radial-gradient(circle at 60% 50%,#2f9d7a,#0f3a2e 75%);
  animation-delay:14s;
}
@keyframes heroFade{
  0%{opacity:0;transform:scale(1.1)}
  4%{opacity:1}
  29%{opacity:1}
  35%{opacity:0;transform:scale(1)}
  100%{opacity:0;transform:scale(1)}
}
.hero__overlay{
  position:absolute;inset:0;
  background:linear-gradient(95deg,rgba(8,32,19,.86) 0%,rgba(13,50,31,.62) 48%,rgba(20,80,50,.3) 100%),
             linear-gradient(transparent 62%,rgba(8,32,19,.7));
}
.hero__side{
  position:absolute;top:50%;right:28px;transform:translateY(-50%);
  writing-mode:vertical-rl;font-family:"Oswald",sans-serif;letter-spacing:.32em;
  font-size:.72rem;color:rgba(255,255,255,.55);z-index:1;
}
.hero__inner{position:relative;z-index:1;max-width:none;margin:0;padding:0 24px 104px clamp(24px,3vw,44px);width:100%}
.hero__en-top{font-size:1rem;letter-spacing:.14em;line-height:2;color:rgba(255,255,255,.85);font-weight:400;margin-bottom:30px;max-width:760px}
.hero__title{font-size:clamp(1.9rem,3.9vw,3.15rem);font-weight:900;line-height:1.5;letter-spacing:.02em;margin-bottom:28px;color:#fff;text-shadow:0 2px 20px rgba(0,0,0,.3)}
.hero__text{font-size:1.12rem;line-height:1.95;color:#e9f4ee;margin-bottom:40px;max-width:660px}
.hero__actions{display:flex;gap:16px;flex-wrap:wrap}
.hero .btn--ghost{border-color:rgba(255,255,255,.8);color:#fff}
.hero .btn--ghost:hover{background:#fff;color:var(--green)}
.hero__scroll{
  position:absolute;bottom:26px;left:50%;transform:translateX(-50%);
  font-family:"Oswald",sans-serif;font-size:.7rem;letter-spacing:.3em;color:rgba(255,255,255,.85);z-index:1;
}
.hero__scroll::after{content:"";display:block;width:1px;height:46px;background:var(--green-light);margin:8px auto 0;animation:scroll 2s infinite}
@keyframes scroll{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}}

/* ===== Section base ===== */
.section{padding:100px 0}
.sec-head{margin-bottom:54px}
.sec-head__en{
  display:block;font-family:"Oswald",sans-serif;font-size:.95rem;letter-spacing:.3em;
  color:var(--green-2);font-weight:600;margin-bottom:8px;text-transform:uppercase;
}
.sec-head__ja{font-size:2rem;font-weight:900;letter-spacing:.04em;color:var(--green)}
.sec-head__ja::after{content:"";display:block;width:48px;height:3px;background:var(--green-light);margin-top:16px}
.sec-head--light .sec-head__en{color:#bfe6cd}
.sec-head--light .sec-head__ja{color:#fff}
.sec-head--light .sec-head__ja::after{background:#bfe6cd}
.sec-head__en--center{text-align:center;margin-bottom:10px;color:#bfe6cd}

/* ===== Company ===== */
.section--company{background:#fff}
.company{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:center}
.company__img{
  min-height:380px;border-radius:6px;
  background-image:url('images/site-loading.jpg'),linear-gradient(135deg,var(--green-2),var(--green));
  background-size:cover;background-position:center;
  position:relative;overflow:hidden;
}
.company__img::after{
  content:"";position:absolute;left:18px;bottom:18px;width:70px;height:70px;
  border-left:3px solid #fff;border-bottom:3px solid #fff;opacity:.85;
}
.company__catch{font-size:1.7rem;font-weight:900;line-height:1.4;color:var(--green);margin-bottom:24px}
.company__body p{margin-bottom:18px;color:#3a4a40}
.company__points{list-style:none;display:flex;gap:28px;margin-top:32px;flex-wrap:wrap}
.company__points li{display:flex;flex-direction:column}
.company__points .num{font-family:"Oswald",sans-serif;font-size:2.6rem;font-weight:600;color:var(--green-2);line-height:1}
.company__points .lbl{font-size:.82rem;color:var(--gray);margin-top:6px;font-weight:500}

/* ===== Business ===== */
.section--business{background:var(--green-pale)}
.section--business .sec-head__ja,.section--business .sec-head__en{color:var(--green)}
.section--business .sec-head__en{color:var(--green-2)}
.biz{display:flex;flex-direction:column;gap:40px}
.biz__card{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden;
}
.biz__card--reverse .biz__img{order:2}
.biz__img{min-height:320px;position:relative;overflow:hidden;background:var(--green);background-size:cover;background-position:center}
.biz__img--transport{background-image:url('images/hero-trucks.jpg'),linear-gradient(135deg,#1d6b3f,#2f8d57)}
.biz__img--civil{background-image:url('images/site-excavation.jpg'),linear-gradient(135deg,#3f7d2c,#6aa83a)}
.biz__img--maintenance{background-image:url('images/site-tunnel.jpg'),linear-gradient(135deg,#1f6149,#2f9d7a)}
.biz__text{padding:40px 44px 40px 8px}
.biz__card--reverse .biz__text{padding:40px 8px 40px 44px}
.biz__no{font-family:"Oswald",sans-serif;font-size:3rem;font-weight:600;color:var(--green-light);line-height:1;display:block;margin-bottom:6px}
.biz__title{font-size:1.7rem;font-weight:900;margin-bottom:12px;color:var(--green)}
.biz__sub{color:var(--green-2);font-weight:700;margin-bottom:16px;font-size:1.05rem}
.biz__text p:last-child{color:#3a4a40}

/* ===== Results ===== */
.section--results{background:#fff}
.results__lead{max-width:760px;color:#3a4a40;margin-bottom:46px}
.results__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.result-card{background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden;transition:.25s}
.result-card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(29,107,63,.12)}
.result-card__img{height:160px;position:relative;background-size:cover;background-position:center}
.result-card__img--1{background-image:url('images/hero-trucks.jpg'),linear-gradient(135deg,#1d6b3f,#2f8d57)}
.result-card__img--2{background-image:url('images/site-loading.jpg'),linear-gradient(135deg,#3f7d2c,#6aa83a)}
.result-card__img--3{background-image:url('images/site-excavation.jpg'),linear-gradient(135deg,#1f6149,#2f9d7a)}
.result-card__img--4{background-image:url('images/site-tunnel.jpg'),linear-gradient(135deg,#2f6b57,#4fae8a)}
.result-card__body{padding:22px 22px 26px}
.result-card__cat{
  display:inline-block;background:var(--green-pale2);color:var(--green);
  font-size:.72rem;font-weight:700;padding:4px 12px;border-radius:20px;margin-bottom:12px;
}
.result-card__body h3{font-size:1.15rem;color:var(--green);margin-bottom:10px;font-weight:900;line-height:1.4}
.result-card__body p{font-size:.86rem;color:#3a4a40}
.results__stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;margin-top:56px;
  background:var(--line);border:1px solid var(--line);border-radius:8px;overflow:hidden;
}
.stat{background:var(--green-pale);text-align:center;padding:32px 16px;display:flex;flex-direction:column;align-items:center}
.stat__num{font-family:"Oswald",sans-serif;font-size:2.6rem;font-weight:600;color:var(--green);line-height:1}
.stat__lbl{font-size:.85rem;color:var(--gray);margin-top:8px;font-weight:500}

/* ===== Movie (緑ブロック) ===== */
.section--movie{background:linear-gradient(120deg,var(--green),var(--green-2));color:#fff}
.movie__lead{color:#e4f2ea;margin-bottom:36px;max-width:760px}
.movie__frame{position:relative;max-width:900px;margin:0 auto;aspect-ratio:16/9;border-radius:10px;overflow:hidden;box-shadow:0 18px 40px rgba(0,0,0,.25)}
.movie__placeholder{
  position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;
  background:linear-gradient(135deg,#0f3a24,#1d6b3f);
}
.movie__play{
  width:80px;height:80px;border-radius:50%;border:0;cursor:pointer;
  background:rgba(255,255,255,.95);display:flex;align-items:center;justify-content:center;transition:.25s;
}
.movie__play:hover{transform:scale(1.08);background:#fff}
.movie__tri{width:0;height:0;border-left:22px solid var(--green);border-top:14px solid transparent;border-bottom:14px solid transparent;margin-left:5px}
.movie__note{font-size:.85rem;color:rgba(255,255,255,.75);letter-spacing:.05em}
.movie__iframe{position:absolute;inset:0;width:100%;height:100%;border:0}

/* ===== Recruit (緑ブロック) ===== */
.section--recruit{position:relative;color:#fff;overflow:hidden}
.recruit__bg{position:absolute;inset:0;z-index:0;background:linear-gradient(120deg,var(--green),var(--green-2));}
.recruit__bg::after{content:"";position:absolute;inset:0;background:repeating-linear-gradient(45deg,rgba(255,255,255,.03) 0 2px,transparent 2px 20px)}
.section--recruit .container{position:relative;z-index:1}
.recruit__catch{font-size:1.7rem;font-weight:900;line-height:1.4;margin-bottom:20px}
.recruit__lead{max-width:760px;color:#e4f2ea;margin-bottom:46px}
.recruit__features{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:44px}
.recruit__features li{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);border-radius:6px;padding:28px 26px}
.recruit__features h4{font-size:1.15rem;margin-bottom:12px;color:#cdeed9}
.recruit__features p{font-size:.92rem;color:#e4f2ea}
.recruit__cta{text-align:center}
.section--recruit .btn--primary{background:#fff;color:var(--green)}
.section--recruit .btn--primary:hover{background:var(--green-pale)}

/* ===== Safety ===== */
.section--safety{background:#fff}
.safety{display:grid;grid-template-columns:1fr 1fr;gap:36px}
.safety__item{background:var(--green-pale);border:1px solid var(--line);border-radius:8px;padding:42px 38px;border-top:4px solid var(--green)}
.safety__icon{font-family:"Oswald",sans-serif;letter-spacing:.2em;font-size:.8rem;color:var(--green-2);font-weight:600;margin-bottom:14px}
.safety__item h3{font-size:1.4rem;color:var(--green);margin-bottom:16px;font-weight:900}
.safety__item p{color:#3a4a40}

/* ===== Profile ===== */
.section--profile{background:var(--green-pale)}
.profile{width:100%;border-collapse:collapse;max-width:840px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.profile th,.profile td{text-align:left;padding:18px 24px;border-bottom:1px solid var(--line);vertical-align:top}
.profile tr:last-child th,.profile tr:last-child td{border-bottom:0}
.profile th{width:200px;font-weight:700;color:#fff;background:var(--green);font-size:.95rem}
.profile td{color:var(--ink)}
.profile a{color:var(--green);border-bottom:1px solid var(--green-light)}
.profile__note{max-width:840px;margin:18px auto 0;font-size:.82rem;color:var(--gray)}

/* ===== Access ===== */
.section--access{background:#fff}
.access{display:grid;grid-template-columns:1fr 1.4fr;gap:40px;align-items:start}
.access__info h3{font-size:1.3rem;color:var(--green);margin-bottom:16px;font-weight:900}
.access__info p{margin-bottom:12px;color:#3a4a40}
.access__info a{color:var(--green);font-weight:700}
.access__note{font-size:.8rem;color:var(--gray)}
.access__map{border-radius:8px;overflow:hidden;border:1px solid var(--line)}

/* ===== Contact (緑ブロック) ===== */
.section--contact{background:linear-gradient(120deg,var(--green),var(--green-2));color:#fff;text-align:center}
.contact__title{font-size:2.2rem;font-weight:900;margin-bottom:18px}
.contact__lead{color:#e4f2ea;margin-bottom:36px}
.contact__tel{margin-bottom:30px}
.contact__tel span{display:block;font-size:.8rem;color:#cdeed9;letter-spacing:.05em;margin-bottom:4px}
.contact__tel a{font-family:"Oswald",sans-serif;font-size:2.6rem;font-weight:600;color:#fff}
.section--contact .btn--primary{background:#fff;color:var(--green)}
.section--contact .btn--primary:hover{background:var(--green-pale)}

/* ===== Footer ===== */
.footer{background:#123a25;color:#cdded3;padding:54px 0 24px}
.footer__inner{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer__brand .logo__mark{display:block;font-size:1.2rem;font-weight:900;color:#fff}
.footer__brand .logo__sub{display:block;font-family:"Oswald",sans-serif;font-size:.6rem;letter-spacing:.18em;color:var(--green-light);margin:4px 0 10px}
.footer__brand p{color:var(--green-light);font-size:.9rem}
.footer__nav{display:flex;flex-wrap:wrap;gap:8px 24px;align-content:flex-start}
.footer__nav a{font-size:.9rem;transition:.2s}
.footer__nav a:hover{color:var(--green-light)}
.footer__copy{text-align:center;font-family:"Oswald",sans-serif;font-size:.72rem;letter-spacing:.15em;color:#7fa790;margin-top:22px}

/* ===== Responsive ===== */

/* --- タブレット以下：ヘッダーをハンバーガーメニューに --- */
@media(max-width:1024px){
  .header__tel{display:none}
  .gnav{
    position:fixed;top:74px;right:0;width:min(82%,340px);height:calc(100vh - 74px);
    background:var(--green);flex-direction:column;align-items:flex-start;gap:0;
    padding:20px 28px;transform:translateX(100%);transition:.3s;overflow-y:auto;
  }
  .gnav.open{transform:translateX(0)}
  .gnav a{width:100%;padding:16px 0;border-bottom:1px solid rgba(255,255,255,.14);font-size:1rem;color:#fff}
  .gnav a:hover{color:#cdeed9}
  .gnav__cta{margin-top:18px;text-align:center;background:#fff;color:var(--green)!important}
  .hamburger{display:flex;flex-direction:column;justify-content:center;gap:6px;width:38px;height:38px;margin-left:auto;background:none;border:0;cursor:pointer}
  .hamburger span{display:block;height:2px;background:var(--green);transition:.3s}
  .hamburger.open span:nth-child(1){transform:translateY(8px) rotate(45deg)}
  .hamburger.open span:nth-child(2){opacity:0}
  .hamburger.open span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}
  .hero__side{display:none}
}

/* --- タブレット縦・スマホ：レイアウトを1カラムに --- */
@media(max-width:880px){
  .section{padding:72px 0}
  .hero__text{font-size:.98rem}
  .company,.biz__card,.safety,.access,.recruit__features{grid-template-columns:1fr}
  .company,.safety,.access{gap:32px}
  .recruit__features{gap:18px}
  .biz__card{gap:0}
  .biz__card--reverse .biz__img{order:0}
  .biz__text,.biz__card--reverse .biz__text{padding:32px 28px}
  .biz__img{min-height:220px}
  .results__grid{grid-template-columns:1fr 1fr;gap:16px}
  .results__stats{grid-template-columns:1fr 1fr}
  .sec-head__ja{font-size:1.6rem}
  .profile th{width:36%;padding:14px 16px;font-size:.85rem}
  .profile td{padding:14px 16px;font-size:.92rem}
  .access__map iframe{height:260px}
  .footer__inner{flex-direction:column;gap:20px}
}

/* --- 小型スマホ：文字サイズ・余白を最適化 --- */
@media(max-width:560px){
  .container{padding:0 18px}
  .header__inner{padding:0 18px}
  .logo__mark{font-size:1.15rem}
  .section{padding:58px 0}
  .sec-head{margin-bottom:38px}
  .results__grid{grid-template-columns:1fr}
  .hero__title{font-size:1.6rem;line-height:1.6}
  .hero__en-top{font-size:.82rem;letter-spacing:.1em;line-height:1.9;margin-bottom:22px}
  .hero__text{font-size:.98rem;line-height:1.9}
  .hero__actions{gap:12px}
  .hero__actions .btn{flex:1;padding:14px 18px;justify-content:center}
  .company__catch,.recruit__catch,.biz__title{font-size:1.4rem}
  .company__points{gap:20px}
  .company__points .num,.stat__num{font-size:2.1rem}
  .contact__title{font-size:1.7rem}
  .contact__tel a{font-size:2rem}
  .safety__item,.biz__text,.biz__card--reverse .biz__text{padding:28px 22px}
  .profile th{width:38%}
}