:root {
  --primary: #1a3a6b;
  --accent: #2a5090;
  --gold: #2a4a80;
  --text: #1a1a1a;
  --text-sub: #666;
  --bg: #ffffff;
  --bg-muted: #f4f6fa;
  --bg-dark: #080f1a;
  --white: #fff;
  --border: #b8c8d8;
  --ink: #080f1a;
  --radius: 4px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Noto Sans JP', sans-serif; color: var(--text); background: var(--bg); line-height: 1.7; }
a { text-decoration: none; color: inherit; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 32px; }
section { padding: 100px 0; }

/* Header */
#header { position: fixed; top: 0; left: 0; right: 0; z-index: 100; background: rgba(255,255,255,0.96); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.nav-logo { font-size: 1rem; font-weight: 700; color: var(--primary); letter-spacing: 0.05em; }
.nav-logo span { font-weight: 400; font-size: 0.8rem; margin-left: 6px; color: var(--text-sub); }
.nav-links { display: flex; gap: 28px; list-style: none; align-items: center; }
.nav-links a { font-size: 0.82rem; color: var(--text-sub); letter-spacing: 0.05em; transition: color .2s; }
.nav-links a:hover { color: var(--primary); }
.nav-cta { background: var(--primary) !important; color: var(--white) !important; padding: 8px 18px; border-radius: 2px; font-weight: 600; font-size: 0.8rem !important; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; }
.nav-toggle span { display: block; width: 22px; height: 1.5px; background: var(--text); }

/* Hero */
#hero { display: grid; grid-template-columns: minmax(0,1fr) minmax(0,1fr); min-height: 100vh; padding: 0; margin-top: 64px; }
.hero-left { display: flex; flex-direction: column; justify-content: center; padding: 80px 60px 80px 80px; }
.hero-eyebrow { font-size: 0.75rem; letter-spacing: 0.2em; color: var(--text-sub); margin-bottom: 24px; }
.hero-title { font-size: clamp(2.4rem, 4.5vw, 3.6rem); font-weight: 700; line-height: 1.25; color: var(--text); margin-bottom: 24px; }
.hero-title em { font-style: normal; color: var(--primary); }
.hero-desc { font-size: 0.95rem; color: var(--text-sub); line-height: 2; margin-bottom: 40px; }
.hero-actions { display: flex; flex-direction: column; gap: 12px; align-items: flex-start; margin-bottom: 48px; }
.btn-primary { background: var(--primary); color: var(--white); padding: 15px 28px; border-radius: 2px; font-weight: 700; font-size: 0.9rem; letter-spacing: 0.05em; display: inline-block; transition: background .2s; }
.btn-primary:hover { background: #0f2550; }
.btn-outline { background: transparent; color: var(--primary); padding: 13px 28px; border-radius: 2px; font-weight: 600; font-size: 0.9rem; border: 1.5px solid var(--primary); display: inline-block; transition: .2s; }
.btn-outline:hover { background: var(--primary); color: var(--white); }
.hero-proof { display: flex; align-items: center; gap: 24px; }
.proof-item { display: flex; flex-direction: column; }
.proof-item strong { font-size: 1.8rem; font-weight: 700; color: var(--primary); line-height: 1; }
.proof-item span { font-size: 0.72rem; color: var(--text-sub); margin-top: 4px; }
.proof-sep { width: 1px; height: 32px; background: var(--border); }
.hero-right { overflow: hidden; }
.hero-right img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* Section header */
.section-header { text-align: center; margin-bottom: 56px; }
.section-en { font-size: 0.78rem; letter-spacing: 0.4em; color: var(--gold); margin-bottom: 10px; }
.section-title { font-size: clamp(1.8rem, 3vw, 2.4rem); font-weight: 700; color: var(--text); }
.section-lead { font-size: 0.9rem; color: var(--text-sub); margin-top: 12px; }

/* サービスグリッド */
.section-muted { background: var(--bg-muted); }
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.service-card { background: var(--white); border: 1px solid var(--border); border-top: 3px solid var(--primary); padding: 28px 20px; text-align: center; }
.service-icon { font-size: 2.2rem; margin-bottom: 14px; }
.service-card h3 { font-size: 0.95rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.service-card p { font-size: 0.8rem; color: var(--text-sub); line-height: 1.8; }

/* 特長 */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card { padding: 36px 28px; border: 1px solid var(--border); border-left: 4px solid var(--primary); }
.feature-num { font-size: 2rem; font-weight: 700; color: var(--border); line-height: 1; margin-bottom: 12px; }
.feature-card h3 { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.feature-card p { font-size: 0.85rem; color: var(--text-sub); line-height: 1.9; }

/* 施工実績 */
.works-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.work-card { overflow: hidden; border-radius: 2px; }
.work-card img { width: 100%; height: 220px; object-fit: cover; display: block; transition: transform .3s; }
.work-card:hover img { transform: scale(1.03); }
.work-info { padding: 14px 0 0; }
.work-info h3 { font-size: 0.9rem; font-weight: 700; margin-bottom: 4px; }
.work-info p { font-size: 0.78rem; color: var(--text-sub); }

/* 口コミ */
.reviews-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.review-block { background: var(--bg-muted); border-left: 3px solid var(--primary); padding: 28px; border-radius: 0 4px 4px 0; }
.review-stars { color: #c9a227; font-size: 0.9rem; margin-bottom: 12px; }
.review-block p { font-size: 0.9rem; color: var(--text); line-height: 1.9; margin-bottom: 12px; }
.review-block cite { font-size: 0.78rem; color: var(--text-sub); }

/* 会社概要 */
.company-table { width: 100%; border-collapse: collapse; }
.company-table th { background: var(--bg-muted); padding: 14px 20px; font-size: 0.85rem; font-weight: 600; text-align: left; border-bottom: 1px solid var(--border); width: 140px; }
.company-table td { padding: 14px 20px; border-bottom: 1px solid var(--border); font-size: 0.88rem; }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 0; border-top: 1px solid var(--border); }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-q { display: flex; justify-content: space-between; align-items: center; padding: 20px 4px; cursor: pointer; font-weight: 600; font-size: 0.92rem; gap: 16px; }
.faq-q::after { content: '+'; font-size: 1.2rem; color: var(--primary); flex-shrink: 0; transition: transform .3s; }
.faq-item.open .faq-q::after { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .4s ease; }
.faq-a p { padding: 0 4px 20px; font-size: 0.88rem; color: var(--text-sub); line-height: 2; }

/* アクセス */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.access-dl { display: grid; grid-template-columns: 80px 1fr; gap: 12px 16px; margin-top: 20px; }
.access-dl dt { font-size: 0.78rem; color: var(--text-sub); padding-top: 2px; }
.access-dl dd { font-size: 0.9rem; }
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-field label { display: block; font-size: 0.78rem; color: var(--text-sub); margin-bottom: 6px; font-weight: 600; }
.form-field input, .form-field textarea, .form-field select { width: 100%; border: 1px solid var(--border); padding: 12px 14px; font-size: 0.88rem; font-family: inherit; border-radius: 2px; background: var(--bg-muted); color: var(--text); transition: border-color .2s; }
.form-field input:focus, .form-field textarea:focus { outline: none; border-color: var(--primary); background: #fff; }
.req { color: #c0392b; font-size: 0.7rem; margin-left: 4px; }
.btn-submit { background: var(--primary); color: var(--white); border: none; padding: 16px; font-size: 0.95rem; font-weight: 700; cursor: pointer; border-radius: 2px; transition: background .2s; }
.btn-submit:hover { background: #0f2550; }

/* CTA dark */
.section-dark { background: var(--bg-dark); padding: 80px 0; }

/* Footer */
#footer { background: var(--ink); color: rgba(255,255,255,0.5); text-align: center; padding: 48px 32px; }
.footer-logo { font-size: 1.1rem; font-weight: 700; color: rgba(255,255,255,0.85); margin-bottom: 8px; }
.footer-copy { font-size: 0.75rem; margin-top: 8px; }

/* Fade-in */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.fade-in.visible { opacity: 1; transform: none; }

/* Mobile */
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  section { padding: 64px 0; }
  #hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-left { padding: 80px 20px 48px; }
  .hero-right { height: 260px; }
  .hero-proof { flex-wrap: wrap; gap: 16px; }
  .nav-links { display: none; flex-direction: column; position: absolute; top: 64px; left: 0; right: 0; background: #fff; padding: 20px; gap: 16px; box-shadow: 0 8px 24px rgba(0,0,0,0.1); }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: 1fr; }
  .works-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-list { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
}