/* ===== リセット & 基底 ===== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#4A6741;
  --primary-dark:#2D4226;
  --accent:#C9A227;
  --accent-light:#E0C040;
  --bg:#FFFFFF;
  --bg-alt:#F5F6F2;
  --text:#1A1F18;
  --text-muted:#5A6555;
  --border:#E0E4DA;
  --radius:14px;
  --shadow:0 10px 30px rgba(45,66,38,.08);
  --font:'Noto Sans JP','Inter',sans-serif;
}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.7;overflow-x:hidden}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}

/* ===== ヘッダー ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);transition:background .3s,box-shadow .3s}
.site-header.scrolled{background:rgba(255,255,255,.98);box-shadow:0 4px 20px rgba(15,45,86,.08)}
.header-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:72px;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px}
.logo-mark{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:9px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff}
.logo-text{font-weight:800;font-size:18px;line-height:1.1;color:var(--text)}
.logo-sub{display:block;font-size:10px;font-weight:600;letter-spacing:2px;color:var(--text-muted);font-family:'Inter',sans-serif}
.nav-menu{display:flex;gap:36px}
.nav-menu a{font-size:14px;font-weight:600;color:var(--text);position:relative;padding:4px 0;transition:color .2s}
.nav-menu a::after{content:'';position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--accent);transition:width .25s}
.nav-menu a:hover{color:var(--primary)}
.nav-menu a:hover::after{width:100%}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.hamburger span{width:22px;height:2px;background:var(--text);border-radius:2px;transition:transform .3s}
.hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== ヒーロー ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:80px 0 40px;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;transform:scale(1.08);animation:heroZoom 12s ease-out forwards}
@keyframes heroZoom{to{transform:scale(1)}}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(45,66,38,.92) 0%,rgba(74,103,65,.7) 60%,rgba(45,66,38,.85) 100%)}
.hero-content{position:relative;z-index:2;max-width:820px;padding:0 24px}
.hero-tag{display:inline-block;font-size:13px;font-weight:600;letter-spacing:1px;color:#fff;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.25);padding:8px 18px;border-radius:50px;margin-bottom:24px}
.hero-title{font-size:clamp(32px,6vw,56px);font-weight:800;color:#fff;line-height:1.25;margin-bottom:20px}
.hero-title .accent{color:var(--accent);position:relative}
.hero-desc{font-size:clamp(15px,2.2vw,18px);color:rgba(255,255,255,.88);margin-bottom:36px;line-height:1.8}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn-primary{display:inline-flex;align-items:center;justify-content:center;padding:15px 36px;background:var(--accent);color:var(--primary-dark);font-weight:700;font-size:15px;border-radius:50px;border:none;cursor:pointer;transition:transform .2s,box-shadow .2s}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(255,182,39,.4)}
.btn-ghost{display:inline-flex;align-items:center;justify-content:center;padding:15px 36px;background:transparent;color:#fff;font-weight:600;font-size:15px;border-radius:50px;border:1.5px solid rgba(255,255,255,.5);cursor:pointer;transition:background .2s}
.btn-ghost:hover{background:rgba(255,255,255,.1)}
.btn-primary.full{width:100%;padding:18px}
.hero-scroll{position:absolute;bottom:28px;left:50%;transform:translateX(-50%);color:rgba(255,255,255,.7);font-size:11px;letter-spacing:3px;writing-mode:vertical-rl;animation:scrollHint 1.8s ease-in-out infinite}
@keyframes scrollHint{0%,100%{opacity:.5}50%{opacity:1}}

/* ===== 統計 ===== */
.stats{background:var(--primary-dark);padding:48px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat-item{text-align:center;padding:20px}
.stat-num{font-family:'Inter',sans-serif;font-size:48px;font-weight:800;color:var(--accent);line-height:1}
.stat-label{font-size:13px;color:rgba(255,255,255,.8);margin-top:8px;font-weight:500}

/* ===== セクション共通 ===== */
section{padding:100px 0}
.section-head{max-width:640px;margin-bottom:56px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-label{display:inline-block;font-family:'Inter',sans-serif;font-size:12px;font-weight:700;letter-spacing:3px;color:var(--accent);margin-bottom:14px}
.section-title{font-size:clamp(26px,4vw,40px);font-weight:800;line-height:1.2;margin-bottom:18px}
.section-lead{font-size:16px;color:var(--text-muted);line-height:1.7}

/* ===== 事業内容 ===== */
.services{background:var(--bg)}
.services-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.service-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:32px 24px;transition:transform .3s,box-shadow .3s,border-color .3s}
.service-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.service-icon{width:60px;height:60px;border-radius:14px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;display:flex;align-items:center;justify-content:center;margin-bottom:22px}
.service-card h3{font-size:19px;font-weight:700;margin-bottom:12px}
.service-card p{font-size:14px;color:var(--text-muted);line-height:1.7;margin-bottom:16px}
.service-tags{display:flex;flex-wrap:wrap;gap:8px}
.service-tags li{font-size:11px;font-weight:600;color:var(--primary);background:rgba(27,75,140,.08);padding:5px 12px;border-radius:50px}

/* ===== 強み ===== */
.strengths{background:var(--bg-alt)}
.strengths-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.strength-item{position:relative;padding:36px 28px;background:#fff;border-radius:var(--radius);border-top:4px solid var(--accent)}
.strength-num{font-family:'Inter',sans-serif;font-size:52px;font-weight:800;color:rgba(27,75,140,.1);line-height:1;margin-bottom:10px}
.strength-item h3{font-size:20px;font-weight:700;margin-bottom:12px}
.strength-item p{font-size:14px;color:var(--text-muted);line-height:1.75}

/* ===== 施工実績 ===== */
.works{background:var(--bg)}
.works-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.work-card{border-radius:var(--radius);overflow:hidden;background:#fff;border:1px solid var(--border);box-shadow:0 4px 16px rgba(15,45,86,.05);transition:transform .3s,box-shadow .3s}
.work-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.work-img{height:220px;background-size:cover;background-position:center;transition:transform .5s}
.work-card:hover .work-img{transform:scale(1.06)}
.work-body{padding:24px}
.work-cat{display:inline-block;font-size:11px;font-weight:700;letter-spacing:1px;color:var(--accent);text-transform:uppercase;margin-bottom:10px}
.work-body h3{font-size:18px;font-weight:700;margin-bottom:8px}
.work-body p{font-size:14px;color:var(--text-muted);line-height:1.65}

/* ===== 会社概要 ===== */
.about{background:var(--bg-alt);padding:0}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:100px 24px;max-width:1200px;margin:0 auto}
.about-img{height:520px;border-radius:20px;background-size:cover;background-position:center}
.about-body .section-title{margin-bottom:20px}
.about-lead{font-size:15px;color:var(--text-muted);line-height:1.8;margin-bottom:28px}
.company-info{display:grid;grid-template-columns:100px 1fr;gap:12px 20px;font-size:14px}
.company-info dt{font-weight:700;color:var(--primary)}
.company-info dd{color:var(--text-muted)}

/* ===== お問い合わせ ===== */
.contact{background:var(--primary-dark);color:#fff}
.contact .section-title{color:#fff}
.contact .section-lead{color:rgba(255,255,255,.75)}
.contact .section-label{color:var(--accent)}
.contact-grid{display:grid;grid-template-columns:1fr 1.4fr;gap:48px;align-items:start}
.contact-info{display:flex;flex-direction:column;gap:24px}
.contact-row{display:flex;align-items:flex-start;gap:14px}
.contact-row svg{color:var(--accent);margin-top:2px;flex-shrink:0}
.contact-label{font-size:12px;color:rgba(255,255,255,.6);text-transform:uppercase;letter-spacing:1px;margin-bottom:4px}
.contact-value{font-size:16px;font-weight:600;color:#fff}
.contact-note{font-size:12px;color:rgba(255,255,255,.55);margin-top:3px}
.contact-form{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);padding:32px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-field{margin-bottom:18px}
.form-field label{display:block;font-size:13px;font-weight:600;color:rgba(255,255,255,.85);margin-bottom:7px}
.form-field input,.form-field select,.form-field textarea{width:100%;padding:12px 14px;border:1px solid rgba(255,255,255,.2);border-radius:10px;background:rgba(255,255,255,.06);color:#fff;font-size:14px;font-family:var(--font);transition:border-color .2s,background .2s}
.form-field input::placeholder,.form-field textarea::placeholder{color:rgba(255,255,255,.4)}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{outline:none;border-color:var(--accent);background:rgba(255,255,255,.1)}
.form-field select option{background:var(--primary-dark);color:#fff}
.contact-form .btn-primary{margin-top:6px}

/* ===== フッター ===== */
.site-footer{background:#1A2A14;color:rgba(255,255,255,.7);padding:48px 0 32px}
.footer-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-brand .logo-mark{width:32px;height:32px}
.footer-brand .logo-text{color:#fff}
.footer-nav{display:flex;gap:24px}
.footer-nav a{font-size:13px;color:rgba(255,255,255,.6);transition:color .2s}
.footer-nav a:hover{color:#fff}
.footer-copy{font-size:12px;color:rgba(255,255,255,.45)}

/* ===== レスポンシブ ===== */
@media (max-width:1024px){
  .services-grid{grid-template-columns:repeat(2,1fr)}
  .strengths-grid{grid-template-columns:1fr;gap:20px}
  .works-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .nav-menu{display:none}
  .hamburger{display:flex}
  .nav-menu.active{display:flex;position:absolute;top:72px;left:0;right:0;flex-direction:column;background:#fff;padding:20px 24px;border-bottom:1px solid var(--border);gap:18px}
  .nav-menu.active a{padding:8px 0;font-size:16px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:8px}
  .stat-num{font-size:36px}
  .services-grid{grid-template-columns:1fr}
  .works-grid{grid-template-columns:1fr}
  .about-grid{grid-template-columns:1fr;gap:32px;padding:60px 24px}
  .about-img{height:300px}
  .contact-grid{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .footer-inner{flex-direction:column;text-align:center}
}
@media (max-width:480px){
  section{padding:60px 0}
  .hero{min-height:90vh}
  .btn-primary,.btn-ghost{padding:13px 28px;font-size:14px}
}